Update Lua to 5.3.3

develop
lethosor 2016-07-26 23:23:26 -04:00
parent a684e1dd0f
commit e2c6350978
60 changed files with 8743 additions and 4995 deletions

@ -1,5 +1,5 @@
/* /*
** $Id: lapi.h,v 2.7.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lapi.h,v 2.9 2015/03/06 19:49:50 roberto Exp $
** Auxiliary functions from Lua API ** Auxiliary functions from Lua API
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */

@ -1,5 +1,5 @@
/* /*
** $Id: lauxlib.h,v 1.120.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lauxlib.h,v 1.129 2015/11/23 11:29:43 roberto Exp $
** Auxiliary functions for building Lua libraries ** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -16,7 +16,7 @@
/* extra error code for `luaL_load' */ /* extra error code for 'luaL_load' */
#define LUA_ERRFILE (LUA_ERRERR+1) #define LUA_ERRFILE (LUA_ERRERR+1)
@ -26,30 +26,30 @@ typedef struct luaL_Reg {
} luaL_Reg; } luaL_Reg;
LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver); #define LUAL_NUMSIZES (sizeof(lua_Integer)*16 + sizeof(lua_Number))
#define luaL_checkversion(L) luaL_checkversion_(L, LUA_VERSION_NUM)
LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver, size_t sz);
#define luaL_checkversion(L) \
luaL_checkversion_(L, LUA_VERSION_NUM, LUAL_NUMSIZES)
LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e); LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e); LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len); LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len);
LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg); LUALIB_API int (luaL_argerror) (lua_State *L, int arg, const char *extramsg);
LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg, LUALIB_API const char *(luaL_checklstring) (lua_State *L, int arg,
size_t *l); size_t *l);
LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg, LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg,
const char *def, size_t *l); const char *def, size_t *l);
LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg); LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int arg);
LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def); LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def);
LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg); LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg);
LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg, LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg,
lua_Integer def); lua_Integer def);
LUALIB_API lua_Unsigned (luaL_checkunsigned) (lua_State *L, int numArg);
LUALIB_API lua_Unsigned (luaL_optunsigned) (lua_State *L, int numArg,
lua_Unsigned def);
LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg); LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t); LUALIB_API void (luaL_checktype) (lua_State *L, int arg, int t);
LUALIB_API void (luaL_checkany) (lua_State *L, int narg); LUALIB_API void (luaL_checkany) (lua_State *L, int arg);
LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname); LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname);
LUALIB_API void (luaL_setmetatable) (lua_State *L, const char *tname); LUALIB_API void (luaL_setmetatable) (lua_State *L, const char *tname);
@ -59,13 +59,13 @@ LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
LUALIB_API void (luaL_where) (lua_State *L, int lvl); LUALIB_API void (luaL_where) (lua_State *L, int lvl);
LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...); LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def, LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def,
const char *const lst[]); const char *const lst[]);
LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname); LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname);
LUALIB_API int (luaL_execresult) (lua_State *L, int stat); LUALIB_API int (luaL_execresult) (lua_State *L, int stat);
/* pre-defined references */ /* predefined references */
#define LUA_NOREF (-2) #define LUA_NOREF (-2)
#define LUA_REFNIL (-1) #define LUA_REFNIL (-1)
@ -83,7 +83,7 @@ LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
LUALIB_API lua_State *(luaL_newstate) (void); LUALIB_API lua_State *(luaL_newstate) (void);
LUALIB_API int (luaL_len) (lua_State *L, int idx); LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx);
LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p, LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
const char *r); const char *r);
@ -108,16 +108,13 @@ LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
#define luaL_newlibtable(L,l) \ #define luaL_newlibtable(L,l) \
lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1) lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1)
#define luaL_newlib(L,l) (luaL_newlibtable(L,l), luaL_setfuncs(L,l,0)) #define luaL_newlib(L,l) \
(luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
#define luaL_argcheck(L, cond,numarg,extramsg) \ #define luaL_argcheck(L, cond,arg,extramsg) \
((void)((cond) || luaL_argerror(L, (numarg), (extramsg)))) ((void)((cond) || luaL_argerror(L, (arg), (extramsg))))
#define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL)) #define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL))
#define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL)) #define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL))
#define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n)))
#define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d)))
#define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n)))
#define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d)))
#define luaL_typename(L,i) lua_typename(L, lua_type(L,(i))) #define luaL_typename(L,i) lua_typename(L, lua_type(L,(i)))
@ -207,6 +204,53 @@ LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname,
#endif #endif
/*
** {==================================================================
** "Abstraction Layer" for basic report of messages and errors
** ===================================================================
*/
/* print a string */
#if !defined(lua_writestring)
#define lua_writestring(s,l) fwrite((s), sizeof(char), (l), stdout)
#endif
/* print a newline and flush the output */
#if !defined(lua_writeline)
#define lua_writeline() (lua_writestring("\n", 1), fflush(stdout))
#endif
/* print an error message */
#if !defined(lua_writestringerror)
#define lua_writestringerror(s,p) \
(fprintf(stderr, (s), (p)), fflush(stderr))
#endif
/* }================================================================== */
/*
** {============================================================
** Compatibility with deprecated conversions
** =============================================================
*/
#if defined(LUA_COMPAT_APIINTCASTS)
#define luaL_checkunsigned(L,a) ((lua_Unsigned)luaL_checkinteger(L,a))
#define luaL_optunsigned(L,a,d) \
((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d)))
#define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n)))
#define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d)))
#define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n)))
#define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d)))
#endif
/* }============================================================ */
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: lcode.h,v 1.58.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lcode.h,v 1.64 2016/01/05 16:22:37 roberto Exp $
** Code generator for Lua ** Code generator for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -24,7 +24,11 @@
** grep "ORDER OPR" if you change these enums (ORDER OP) ** grep "ORDER OPR" if you change these enums (ORDER OP)
*/ */
typedef enum BinOpr { typedef enum BinOpr {
OPR_ADD, OPR_SUB, OPR_MUL, OPR_DIV, OPR_MOD, OPR_POW, OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW,
OPR_DIV,
OPR_IDIV,
OPR_BAND, OPR_BOR, OPR_BXOR,
OPR_SHL, OPR_SHR,
OPR_CONCAT, OPR_CONCAT,
OPR_EQ, OPR_LT, OPR_LE, OPR_EQ, OPR_LT, OPR_LE,
OPR_NE, OPR_GT, OPR_GE, OPR_NE, OPR_GT, OPR_GE,
@ -33,10 +37,11 @@ typedef enum BinOpr {
} BinOpr; } BinOpr;
typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr; typedef enum UnOpr { OPR_MINUS, OPR_BNOT, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
#define getcode(fs,e) ((fs)->f->code[(e)->u.info]) /* get (pointer to) instruction of given 'expdesc' */
#define getinstruction(fs,e) ((fs)->f->code[(e)->u.info])
#define luaK_codeAsBx(fs,o,A,sBx) luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx) #define luaK_codeAsBx(fs,o,A,sBx) luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx)
@ -52,7 +57,7 @@ LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n); LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);
LUAI_FUNC void luaK_checkstack (FuncState *fs, int n); LUAI_FUNC void luaK_checkstack (FuncState *fs, int n);
LUAI_FUNC int luaK_stringK (FuncState *fs, TString *s); LUAI_FUNC int luaK_stringK (FuncState *fs, TString *s);
LUAI_FUNC int luaK_numberK (FuncState *fs, lua_Number r); LUAI_FUNC int luaK_intK (FuncState *fs, lua_Integer n);
LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e); LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e);
LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e); LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_exp2anyregup (FuncState *fs, expdesc *e); LUAI_FUNC void luaK_exp2anyregup (FuncState *fs, expdesc *e);

@ -1,5 +1,5 @@
/* /*
** $Id: lctype.h,v 1.12.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lctype.h,v 1.12 2011/07/15 12:50:29 roberto Exp $
** 'ctype' functions for Lua ** 'ctype' functions for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */

@ -1,5 +1,5 @@
/* /*
** $Id: ldebug.h,v 2.7.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: ldebug.h,v 2.14 2015/05/22 17:45:56 roberto Exp $
** Auxiliary functions from Debug Interface module ** Auxiliary functions from Debug Interface module
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,22 +13,27 @@
#define pcRel(pc, p) (cast(int, (pc) - (p)->code) - 1) #define pcRel(pc, p) (cast(int, (pc) - (p)->code) - 1)
#define getfuncline(f,pc) (((f)->lineinfo) ? (f)->lineinfo[pc] : 0) #define getfuncline(f,pc) (((f)->lineinfo) ? (f)->lineinfo[pc] : -1)
#define resethookcount(L) (L->hookcount = L->basehookcount) #define resethookcount(L) (L->hookcount = L->basehookcount)
/* Active Lua function (given call info) */
#define ci_func(ci) (clLvalue((ci)->func))
LUAI_FUNC l_noret luaG_typeerror (lua_State *L, const TValue *o, LUAI_FUNC l_noret luaG_typeerror (lua_State *L, const TValue *o,
const char *opname); const char *opname);
LUAI_FUNC l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2); LUAI_FUNC l_noret luaG_concaterror (lua_State *L, const TValue *p1,
LUAI_FUNC l_noret luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2);
LUAI_FUNC l_noret luaG_opinterror (lua_State *L, const TValue *p1,
const TValue *p2,
const char *msg);
LUAI_FUNC l_noret luaG_tointerror (lua_State *L, const TValue *p1,
const TValue *p2); const TValue *p2);
LUAI_FUNC l_noret luaG_ordererror (lua_State *L, const TValue *p1, LUAI_FUNC l_noret luaG_ordererror (lua_State *L, const TValue *p1,
const TValue *p2); const TValue *p2);
LUAI_FUNC l_noret luaG_runerror (lua_State *L, const char *fmt, ...); LUAI_FUNC l_noret luaG_runerror (lua_State *L, const char *fmt, ...);
LUAI_FUNC const char *luaG_addinfo (lua_State *L, const char *msg,
TString *src, int line);
LUAI_FUNC l_noret luaG_errormsg (lua_State *L); LUAI_FUNC l_noret luaG_errormsg (lua_State *L);
LUAI_FUNC void luaG_traceexec (lua_State *L);
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: ldo.h,v 2.20.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: ldo.h,v 2.29 2015/12/21 13:02:14 roberto Exp $
** Stack and Call structure of Lua ** Stack and Call structure of Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,31 +13,43 @@
#include "lzio.h" #include "lzio.h"
#define luaD_checkstack(L,n) if (L->stack_last - L->top <= (n)) \ /*
luaD_growstack(L, n); else condmovestack(L); ** Macro to check stack size and grow stack if needed. Parameters
** 'pre'/'pos' allow the macro to preserve a pointer into the
** stack across reallocations, doing the work only when needed.
** 'condmovestack' is used in heavy tests to force a stack reallocation
** at every check.
*/
#define luaD_checkstackaux(L,n,pre,pos) \
if (L->stack_last - L->top <= (n)) \
{ pre; luaD_growstack(L, n); pos; } else { condmovestack(L,pre,pos); }
/* In general, 'pre'/'pos' are empty (nothing to save) */
#define luaD_checkstack(L,n) luaD_checkstackaux(L,n,(void)0,(void)0)
#define incr_top(L) {L->top++; luaD_checkstack(L,0);}
#define savestack(L,p) ((char *)(p) - (char *)L->stack) #define savestack(L,p) ((char *)(p) - (char *)L->stack)
#define restorestack(L,n) ((TValue *)((char *)L->stack + (n))) #define restorestack(L,n) ((TValue *)((char *)L->stack + (n)))
/* type of protected functions, to be ran by `runprotected' */ /* type of protected functions, to be ran by 'runprotected' */
typedef void (*Pfunc) (lua_State *L, void *ud); typedef void (*Pfunc) (lua_State *L, void *ud);
LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name, LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name,
const char *mode); const char *mode);
LUAI_FUNC void luaD_hook (lua_State *L, int event, int line); LUAI_FUNC void luaD_hook (lua_State *L, int event, int line);
LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults); LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults);
LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults, LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults);
int allowyield); LUAI_FUNC void luaD_callnoyield (lua_State *L, StkId func, int nResults);
LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u, LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
ptrdiff_t oldtop, ptrdiff_t ef); ptrdiff_t oldtop, ptrdiff_t ef);
LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult); LUAI_FUNC int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult,
int nres);
LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize); LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize);
LUAI_FUNC void luaD_growstack (lua_State *L, int n); LUAI_FUNC void luaD_growstack (lua_State *L, int n);
LUAI_FUNC void luaD_shrinkstack (lua_State *L); LUAI_FUNC void luaD_shrinkstack (lua_State *L);
LUAI_FUNC void luaD_inctop (lua_State *L);
LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode); LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode);
LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud); LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);

@ -1,5 +1,5 @@
/* /*
** $Id: lfunc.h,v 2.8.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lfunc.h,v 2.15 2015/01/13 15:49:11 roberto Exp $
** Auxiliary functions to manipulate prototypes and closures ** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -18,14 +18,42 @@
cast(int, sizeof(TValue *)*((n)-1))) cast(int, sizeof(TValue *)*((n)-1)))
/* test whether thread is in 'twups' list */
#define isintwups(L) (L->twups != L)
/*
** maximum number of upvalues in a closure (both C and Lua). (Value
** must fit in a VM register.)
*/
#define MAXUPVAL 255
/*
** Upvalues for Lua closures
*/
struct UpVal {
TValue *v; /* points to stack or to its own value */
lu_mem refcount; /* reference counter */
union {
struct { /* (when open) */
UpVal *next; /* linked list */
int touched; /* mark to avoid cycles with dead threads */
} open;
TValue value; /* the value (when closed) */
} u;
};
#define upisopen(up) ((up)->v != &(up)->u.value)
LUAI_FUNC Proto *luaF_newproto (lua_State *L); LUAI_FUNC Proto *luaF_newproto (lua_State *L);
LUAI_FUNC Closure *luaF_newCclosure (lua_State *L, int nelems); LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nelems);
LUAI_FUNC Closure *luaF_newLclosure (lua_State *L, int nelems); LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nelems);
LUAI_FUNC UpVal *luaF_newupval (lua_State *L); LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
LUAI_FUNC void luaF_close (lua_State *L, StkId level); LUAI_FUNC void luaF_close (lua_State *L, StkId level);
LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
LUAI_FUNC void luaF_freeupval (lua_State *L, UpVal *uv);
LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
int pc); int pc);

@ -1,5 +1,5 @@
/* /*
** $Id: lgc.h,v 2.58.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lgc.h,v 2.91 2015/12/21 13:02:14 roberto Exp $
** Garbage Collector ** Garbage Collector
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -38,36 +38,27 @@
*/ */
#define GCSpropagate 0 #define GCSpropagate 0
#define GCSatomic 1 #define GCSatomic 1
#define GCSsweepstring 2 #define GCSswpallgc 2
#define GCSsweepudata 3 #define GCSswpfinobj 3
#define GCSsweep 4 #define GCSswptobefnz 4
#define GCSpause 5 #define GCSswpend 5
#define GCScallfin 6
#define GCSpause 7
#define issweepphase(g) \ #define issweepphase(g) \
(GCSsweepstring <= (g)->gcstate && (g)->gcstate <= GCSsweep) (GCSswpallgc <= (g)->gcstate && (g)->gcstate <= GCSswpend)
#define isgenerational(g) ((g)->gckind == KGC_GEN)
/* /*
** macros to tell when main invariant (white objects cannot point to black ** macro to tell when main invariant (white objects cannot point to black
** ones) must be kept. During a non-generational collection, the sweep ** ones) must be kept. During a collection, the sweep
** phase may break the invariant, as objects turned white may point to ** phase may break the invariant, as objects turned white may point to
** still-black objects. The invariant is restored when sweep ends and ** still-black objects. The invariant is restored when sweep ends and
** all objects are white again. During a generational collection, the ** all objects are white again.
** invariant must be kept all times.
*/ */
#define keepinvariant(g) (isgenerational(g) || g->gcstate <= GCSatomic) #define keepinvariant(g) ((g)->gcstate <= GCSatomic)
/*
** Outside the collector, the state in generational mode is kept in
** 'propagate', so 'keepinvariant' is always true.
*/
#define keepinvariantout(g) \
check_exp(g->gcstate == GCSpropagate || !isgenerational(g), \
g->gcstate <= GCSatomic)
/* /*
@ -83,75 +74,74 @@
#define testbit(x,b) testbits(x, bitmask(b)) #define testbit(x,b) testbits(x, bitmask(b))
/* Layout for bit use in `marked' field: */ /* Layout for bit use in 'marked' field: */
#define WHITE0BIT 0 /* object is white (type 0) */ #define WHITE0BIT 0 /* object is white (type 0) */
#define WHITE1BIT 1 /* object is white (type 1) */ #define WHITE1BIT 1 /* object is white (type 1) */
#define BLACKBIT 2 /* object is black */ #define BLACKBIT 2 /* object is black */
#define FINALIZEDBIT 3 /* object has been separated for finalization */ #define FINALIZEDBIT 3 /* object has been marked for finalization */
#define SEPARATED 4 /* object is in 'finobj' list or in 'tobefnz' */
#define FIXEDBIT 5 /* object is fixed (should not be collected) */
#define OLDBIT 6 /* object is old (only in generational mode) */
/* bit 7 is currently used by tests (luaL_checkmemory) */ /* bit 7 is currently used by tests (luaL_checkmemory) */
#define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT) #define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT)
#define iswhite(x) testbits((x)->gch.marked, WHITEBITS) #define iswhite(x) testbits((x)->marked, WHITEBITS)
#define isblack(x) testbit((x)->gch.marked, BLACKBIT) #define isblack(x) testbit((x)->marked, BLACKBIT)
#define isgray(x) /* neither white nor black */ \ #define isgray(x) /* neither white nor black */ \
(!testbits((x)->gch.marked, WHITEBITS | bitmask(BLACKBIT))) (!testbits((x)->marked, WHITEBITS | bitmask(BLACKBIT)))
#define isold(x) testbit((x)->gch.marked, OLDBIT)
/* MOVE OLD rule: whenever an object is moved to the beginning of #define tofinalize(x) testbit((x)->marked, FINALIZEDBIT)
a GC list, its old bit must be cleared */
#define resetoldbit(o) resetbit((o)->gch.marked, OLDBIT)
#define otherwhite(g) (g->currentwhite ^ WHITEBITS) #define otherwhite(g) ((g)->currentwhite ^ WHITEBITS)
#define isdeadm(ow,m) (!(((m) ^ WHITEBITS) & (ow))) #define isdeadm(ow,m) (!(((m) ^ WHITEBITS) & (ow)))
#define isdead(g,v) isdeadm(otherwhite(g), (v)->gch.marked) #define isdead(g,v) isdeadm(otherwhite(g), (v)->marked)
#define changewhite(x) ((x)->gch.marked ^= WHITEBITS) #define changewhite(x) ((x)->marked ^= WHITEBITS)
#define gray2black(x) l_setbit((x)->gch.marked, BLACKBIT) #define gray2black(x) l_setbit((x)->marked, BLACKBIT)
#define valiswhite(x) (iscollectable(x) && iswhite(gcvalue(x)))
#define luaC_white(g) cast(lu_byte, (g)->currentwhite & WHITEBITS) #define luaC_white(g) cast(lu_byte, (g)->currentwhite & WHITEBITS)
#define luaC_condGC(L,c) \ /*
{if (G(L)->GCdebt > 0) {c;}; condchangemem(L);} ** Does one step of collection when debt becomes positive. 'pre'/'pos'
#define luaC_checkGC(L) luaC_condGC(L, luaC_step(L);) ** allows some adjustments to be done only when needed. macro
** 'condchangemem' is used only for heavy tests (forcing a full
** GC cycle on every opportunity)
*/
#define luaC_condGC(L,pre,pos) \
{ if (G(L)->GCdebt > 0) { pre; luaC_step(L); pos;}; \
condchangemem(L,pre,pos); }
/* more often than not, 'pre'/'pos' are empty */
#define luaC_checkGC(L) luaC_condGC(L,(void)0,(void)0)
#define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \
luaC_barrier_(L,obj2gco(p),gcvalue(v)); }
#define luaC_barrierback(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \ #define luaC_barrier(L,p,v) ( \
luaC_barrierback_(L,p); } (iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) ? \
luaC_barrier_(L,obj2gco(p),gcvalue(v)) : cast_void(0))
#define luaC_objbarrier(L,p,o) \ #define luaC_barrierback(L,p,v) ( \
{ if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \ (iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) ? \
luaC_barrier_(L,obj2gco(p),obj2gco(o)); } luaC_barrierback_(L,p) : cast_void(0))
#define luaC_objbarrierback(L,p,o) \ #define luaC_objbarrier(L,p,o) ( \
{ if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) luaC_barrierback_(L,p); } (isblack(p) && iswhite(o)) ? \
luaC_barrier_(L,obj2gco(p),obj2gco(o)) : cast_void(0))
#define luaC_barrierproto(L,p,c) \ #define luaC_upvalbarrier(L,uv) ( \
{ if (isblack(obj2gco(p))) luaC_barrierproto_(L,p,c); } (iscollectable((uv)->v) && !upisopen(uv)) ? \
luaC_upvalbarrier_(L,uv) : cast_void(0))
LUAI_FUNC void luaC_fix (lua_State *L, GCObject *o);
LUAI_FUNC void luaC_freeallobjects (lua_State *L); LUAI_FUNC void luaC_freeallobjects (lua_State *L);
LUAI_FUNC void luaC_step (lua_State *L); LUAI_FUNC void luaC_step (lua_State *L);
LUAI_FUNC void luaC_forcestep (lua_State *L);
LUAI_FUNC void luaC_runtilstate (lua_State *L, int statesmask); LUAI_FUNC void luaC_runtilstate (lua_State *L, int statesmask);
LUAI_FUNC void luaC_fullgc (lua_State *L, int isemergency); LUAI_FUNC void luaC_fullgc (lua_State *L, int isemergency);
LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz, LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz);
GCObject **list, int offset);
LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v); LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v);
LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o); LUAI_FUNC void luaC_barrierback_ (lua_State *L, Table *o);
LUAI_FUNC void luaC_barrierproto_ (lua_State *L, Proto *p, Closure *c); LUAI_FUNC void luaC_upvalbarrier_ (lua_State *L, UpVal *uv);
LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt); LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt);
LUAI_FUNC void luaC_checkupvalcolor (global_State *g, UpVal *uv); LUAI_FUNC void luaC_upvdeccount (lua_State *L, UpVal *uv);
LUAI_FUNC void luaC_changemode (lua_State *L, int mode);
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: llex.h,v 1.72.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: llex.h,v 1.79 2016/05/02 14:02:12 roberto Exp $
** Lexical Analyzer ** Lexical Analyzer
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -14,6 +14,10 @@
#define FIRST_RESERVED 257 #define FIRST_RESERVED 257
#if !defined(LUA_ENV)
#define LUA_ENV "_ENV"
#endif
/* /*
* WARNING: if you change the order of this enumeration, * WARNING: if you change the order of this enumeration,
@ -26,8 +30,10 @@ enum RESERVED {
TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT, TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE, TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
/* other terminal symbols */ /* other terminal symbols */
TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_DBCOLON, TK_EOS, TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE,
TK_NUMBER, TK_NAME, TK_STRING TK_SHL, TK_SHR,
TK_DBCOLON, TK_EOS,
TK_FLT, TK_INT, TK_NAME, TK_STRING
}; };
/* number of reserved words */ /* number of reserved words */
@ -36,6 +42,7 @@ enum RESERVED {
typedef union { typedef union {
lua_Number r; lua_Number r;
lua_Integer i;
TString *ts; TString *ts;
} SemInfo; /* semantics information */ } SemInfo; /* semantics information */
@ -51,17 +58,17 @@ typedef struct Token {
typedef struct LexState { typedef struct LexState {
int current; /* current character (charint) */ int current; /* current character (charint) */
int linenumber; /* input line counter */ int linenumber; /* input line counter */
int lastline; /* line of last token `consumed' */ int lastline; /* line of last token 'consumed' */
Token t; /* current token */ Token t; /* current token */
Token lookahead; /* look ahead token */ Token lookahead; /* look ahead token */
struct FuncState *fs; /* current function (parser) */ struct FuncState *fs; /* current function (parser) */
struct lua_State *L; struct lua_State *L;
ZIO *z; /* input stream */ ZIO *z; /* input stream */
Mbuffer *buff; /* buffer for tokens */ Mbuffer *buff; /* buffer for tokens */
Table *h; /* to avoid collection/reuse strings */
struct Dyndata *dyd; /* dynamic structures used by the parser */ struct Dyndata *dyd; /* dynamic structures used by the parser */
TString *source; /* current source name */ TString *source; /* current source name */
TString *envn; /* environment variable name */ TString *envn; /* environment variable name */
char decpoint; /* locale decimal point */
} LexState; } LexState;

@ -1,6 +1,6 @@
/* /*
** $Id: llimits.h,v 1.103.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: llimits.h,v 1.141 2015/11/19 19:16:22 roberto Exp $
** Limits, basic types, and some other `installation-dependent' definitions ** Limits, basic types, and some other 'installation-dependent' definitions
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -14,54 +14,77 @@
#include "lua.h" #include "lua.h"
/*
typedef unsigned LUA_INT32 lu_int32; ** 'lu_mem' and 'l_mem' are unsigned/signed integers big enough to count
** the total memory used by Lua (in bytes). Usually, 'size_t' and
** 'ptrdiff_t' should work, but we use 'long' for 16-bit machines.
*/
#if defined(LUAI_MEM) /* { external definitions? */
typedef LUAI_UMEM lu_mem; typedef LUAI_UMEM lu_mem;
typedef LUAI_MEM l_mem; typedef LUAI_MEM l_mem;
#elif LUAI_BITSINT >= 32 /* }{ */
typedef size_t lu_mem;
typedef ptrdiff_t l_mem;
#else /* 16-bit ints */ /* }{ */
typedef unsigned long lu_mem;
typedef long l_mem;
#endif /* } */
/* chars used as small naturals (so that 'char' is reserved for characters) */
/* chars used as small naturals (so that `char' is reserved for characters) */
typedef unsigned char lu_byte; typedef unsigned char lu_byte;
#define MAX_SIZET ((size_t)(~(size_t)0)-2) /* maximum value for size_t */
#define MAX_SIZET ((size_t)(~(size_t)0))
/* maximum size visible for Lua (must be representable in a lua_Integer */
#define MAX_SIZE (sizeof(size_t) < sizeof(lua_Integer) ? MAX_SIZET \
: (size_t)(LUA_MAXINTEGER))
#define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2) #define MAX_LUMEM ((lu_mem)(~(lu_mem)0))
#define MAX_LMEM ((l_mem) ((MAX_LUMEM >> 1) - 2)) #define MAX_LMEM ((l_mem)(MAX_LUMEM >> 1))
#define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */ #define MAX_INT INT_MAX /* maximum value of an int */
/* /*
** conversion of pointer to integer ** conversion of pointer to unsigned integer:
** this is for hashing only; there is no problem if the integer ** this is for hashing only; there is no problem if the integer
** cannot hold the whole pointer value ** cannot hold the whole pointer value
*/ */
#define IntPoint(p) ((unsigned int)(lu_mem)(p)) #define point2uint(p) ((unsigned int)((size_t)(p) & UINT_MAX))
/* type to ensure maximum alignment */ /* type to ensure maximum alignment */
#if !defined(LUAI_USER_ALIGNMENT_T) #if defined(LUAI_USER_ALIGNMENT_T)
#define LUAI_USER_ALIGNMENT_T union { double u; void *s; long l; } typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
#else
typedef union {
lua_Number n;
double u;
void *s;
lua_Integer i;
long l;
} L_Umaxalign;
#endif #endif
typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
/* result of a `usual argument conversion' over lua_Number */ /* types of 'usual argument conversions' for lua_Number and lua_Integer */
typedef LUAI_UACNUMBER l_uacNumber; typedef LUAI_UACNUMBER l_uacNumber;
typedef LUAI_UACINT l_uacInt;
/* internal assertions for in-house debugging */ /* internal assertions for in-house debugging */
#if defined(lua_assert) #if defined(lua_assert)
#define check_exp(c,e) (lua_assert(c), (e)) #define check_exp(c,e) (lua_assert(c), (e))
/* to avoid problems with conditions too long */ /* to avoid problems with conditions too long */
#define lua_longassert(c) { if (!(c)) lua_assert(0); } #define lua_longassert(c) ((c) ? (void)0 : lua_assert(0))
#else #else
#define lua_assert(c) ((void)0) #define lua_assert(c) ((void)0)
#define check_exp(c,e) (e) #define check_exp(c,e) (e)
@ -72,38 +95,49 @@ typedef LUAI_UACNUMBER l_uacNumber;
** assertion for checking API calls ** assertion for checking API calls
*/ */
#if !defined(luai_apicheck) #if !defined(luai_apicheck)
#define luai_apicheck(l,e) lua_assert(e)
#if defined(LUA_USE_APICHECK)
#include <assert.h>
#define luai_apicheck(L,e) assert(e)
#else
#define luai_apicheck(L,e) lua_assert(e)
#endif
#endif #endif
#define api_check(l,e,msg) luai_apicheck(l,(e) && msg) #define api_check(l,e,msg) luai_apicheck(l,(e) && msg)
/* macro to avoid warnings about unused variables */
#if !defined(UNUSED) #if !defined(UNUSED)
#define UNUSED(x) ((void)(x)) /* to avoid warnings */ #define UNUSED(x) ((void)(x))
#endif #endif
/* type casts (a macro highlights casts in the code) */
#define cast(t, exp) ((t)(exp)) #define cast(t, exp) ((t)(exp))
#define cast_void(i) cast(void, (i))
#define cast_byte(i) cast(lu_byte, (i)) #define cast_byte(i) cast(lu_byte, (i))
#define cast_num(i) cast(lua_Number, (i)) #define cast_num(i) cast(lua_Number, (i))
#define cast_int(i) cast(int, (i)) #define cast_int(i) cast(int, (i))
#define cast_uchar(i) cast(unsigned char, (i)) #define cast_uchar(i) cast(unsigned char, (i))
/* cast a signed lua_Integer to lua_Unsigned */
#if !defined(l_castS2U)
#define l_castS2U(i) ((lua_Unsigned)(i))
#endif
/*
** cast a lua_Unsigned to a signed lua_Integer; this cast is
** not strict ISO C, but two-complement architectures should
** work fine.
*/
#if !defined(l_castU2S)
#define l_castU2S(i) ((lua_Integer)(i))
#endif
/* /*
** non-return type ** non-return type
*/ */
#if defined(__GNUC__) #if defined(__GNUC__)
#define l_noret void __attribute__((noreturn)) #define l_noret void __attribute__((noreturn))
#elif defined(_MSC_VER) #elif defined(_MSC_VER) && _MSC_VER >= 1200
#define l_noret void __declspec(noreturn) #define l_noret void __declspec(noreturn)
#else #else
#define l_noret void #define l_noret void
@ -119,29 +153,50 @@ typedef LUAI_UACNUMBER l_uacNumber;
#define LUAI_MAXCCALLS 200 #define LUAI_MAXCCALLS 200
#endif #endif
/*
** maximum number of upvalues in a closure (both C and Lua). (Value
** must fit in an unsigned char.)
*/
#define MAXUPVAL UCHAR_MAX
/* /*
** type for virtual-machine instructions ** type for virtual-machine instructions;
** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h) ** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
*/ */
typedef lu_int32 Instruction; #if LUAI_BITSINT >= 32
typedef unsigned int Instruction;
#else
typedef unsigned long Instruction;
#endif
/* maximum stack for a Lua function */
#define MAXSTACK 250
/*
** Maximum length for short strings, that is, strings that are
** internalized. (Cannot be smaller than reserved words or tags for
** metamethods, as these strings must be internalized;
** #("function") = 8, #("__newindex") = 10.)
*/
#if !defined(LUAI_MAXSHORTLEN)
#define LUAI_MAXSHORTLEN 40
#endif
/* minimum size for the string table (must be power of 2) */ /*
** Initial size for the string table (must be power of 2).
** The Lua core alone registers ~50 strings (reserved words +
** metaevent keys + a few others). Libraries would typically add
** a few dozens more.
*/
#if !defined(MINSTRTABSIZE) #if !defined(MINSTRTABSIZE)
#define MINSTRTABSIZE 32 #define MINSTRTABSIZE 128
#endif
/*
** Size of cache for strings in the API. 'N' is the number of
** sets (better be a prime) and "M" is the size of each set (M == 1
** makes a direct cache.)
*/
#if !defined(STRCACHE_N)
#define STRCACHE_N 53
#define STRCACHE_M 2
#endif #endif
@ -151,13 +206,21 @@ typedef lu_int32 Instruction;
#endif #endif
/*
** macros that are executed whenever program enters the Lua core
** ('lua_lock') and leaves the core ('lua_unlock')
*/
#if !defined(lua_lock) #if !defined(lua_lock)
#define lua_lock(L) ((void) 0) #define lua_lock(L) ((void) 0)
#define lua_unlock(L) ((void) 0) #define lua_unlock(L) ((void) 0)
#endif #endif
/*
** macro executed during Lua functions at points where the
** function can yield.
*/
#if !defined(luai_threadyield) #if !defined(luai_threadyield)
#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);} #define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
#endif #endif
@ -183,127 +246,78 @@ typedef lu_int32 Instruction;
#endif #endif
#if !defined(luai_userstateresume) #if !defined(luai_userstateresume)
#define luai_userstateresume(L,n) ((void)L) #define luai_userstateresume(L,n) ((void)L)
#endif #endif
#if !defined(luai_userstateyield) #if !defined(luai_userstateyield)
#define luai_userstateyield(L,n) ((void)L) #define luai_userstateyield(L,n) ((void)L)
#endif #endif
/*
** lua_number2int is a macro to convert lua_Number to int.
** lua_number2integer is a macro to convert lua_Number to lua_Integer.
** lua_number2unsigned is a macro to convert a lua_Number to a lua_Unsigned.
** lua_unsigned2number is a macro to convert a lua_Unsigned to a lua_Number.
** luai_hashnum is a macro to hash a lua_Number value into an integer.
** The hash must be deterministic and give reasonable values for
** both small and large values (outside the range of integers).
*/
#if defined(MS_ASMTRICK) || defined(LUA_MSASMTRICK) /* { */
/* trick with Microsoft assembler for X86 */
#define lua_number2int(i,n) __asm {__asm fld n __asm fistp i}
#define lua_number2integer(i,n) lua_number2int(i, n)
#define lua_number2unsigned(i,n) \
{__int64 l; __asm {__asm fld n __asm fistp l} i = (unsigned int)l;}
#elif defined(LUA_IEEE754TRICK) /* }{ */
/* the next trick should work on any machine using IEEE754 with
a 32-bit int type */
union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
#if !defined(LUA_IEEEENDIAN) /* { */
#define LUAI_EXTRAIEEE \
static const union luai_Cast ieeeendian = {-(33.0 + 6755399441055744.0)};
#define LUA_IEEEENDIANLOC (ieeeendian.l_p[1] == 33)
#else
#define LUA_IEEEENDIANLOC LUA_IEEEENDIAN
#define LUAI_EXTRAIEEE /* empty */
#endif /* } */
#define lua_number2int32(i,n,t) \
{ LUAI_EXTRAIEEE \
volatile union luai_Cast u; u.l_d = (n) + 6755399441055744.0; \
(i) = (t)u.l_p[LUA_IEEEENDIANLOC]; }
#define luai_hashnum(i,n) \ /*
{ volatile union luai_Cast u; u.l_d = (n) + 1.0; /* avoid -0 */ \ ** The luai_num* macros define the primitive operations over numbers.
(i) = u.l_p[0]; (i) += u.l_p[1]; } /* add double bits for his hash */ */
#define lua_number2int(i,n) lua_number2int32(i, n, int)
#define lua_number2unsigned(i,n) lua_number2int32(i, n, lua_Unsigned)
/* the trick can be expanded to lua_Integer when it is a 32-bit value */ /* floor division (defined as 'floor(a/b)') */
#if defined(LUA_IEEELL) #if !defined(luai_numidiv)
#define lua_number2integer(i,n) lua_number2int32(i, n, lua_Integer) #define luai_numidiv(L,a,b) ((void)L, l_floor(luai_numdiv(L,a,b)))
#endif #endif
#endif /* } */ /* float division */
#if !defined(luai_numdiv)
#define luai_numdiv(L,a,b) ((a)/(b))
/* the following definitions always work, but may be slow */
#if !defined(lua_number2int)
#define lua_number2int(i,n) ((i)=(int)(n))
#endif #endif
#if !defined(lua_number2integer) /*
#define lua_number2integer(i,n) ((i)=(lua_Integer)(n)) ** modulo: defined as 'a - floor(a/b)*b'; this definition gives NaN when
** 'b' is huge, but the result should be 'a'. 'fmod' gives the result of
** 'a - trunc(a/b)*b', and therefore must be corrected when 'trunc(a/b)
** ~= floor(a/b)'. That happens when the division has a non-integer
** negative result, which is equivalent to the test below.
*/
#if !defined(luai_nummod)
#define luai_nummod(L,a,b,m) \
{ (m) = l_mathop(fmod)(a,b); if ((m)*(b) < 0) (m) += (b); }
#endif #endif
#if !defined(lua_number2unsigned) /* { */ /* exponentiation */
/* the following definition assures proper modulo behavior */ #if !defined(luai_numpow)
#if defined(LUA_NUMBER_DOUBLE) || defined(LUA_NUMBER_FLOAT) #define luai_numpow(L,a,b) ((void)L, l_mathop(pow)(a,b))
#include <math.h>
#define SUPUNSIGNED ((lua_Number)(~(lua_Unsigned)0) + 1)
#define lua_number2unsigned(i,n) \
((i)=(lua_Unsigned)((n) - floor((n)/SUPUNSIGNED)*SUPUNSIGNED))
#else
#define lua_number2unsigned(i,n) ((i)=(lua_Unsigned)(n))
#endif #endif
#endif /* } */
/* the others are quite standard operations */
#if !defined(lua_unsigned2number) #if !defined(luai_numadd)
/* on several machines, coercion from unsigned to double is slow, #define luai_numadd(L,a,b) ((a)+(b))
so it may be worth to avoid */ #define luai_numsub(L,a,b) ((a)-(b))
#define lua_unsigned2number(u) \ #define luai_nummul(L,a,b) ((a)*(b))
(((u) <= (lua_Unsigned)INT_MAX) ? (lua_Number)(int)(u) : (lua_Number)(u)) #define luai_numunm(L,a) (-(a))
#define luai_numeq(a,b) ((a)==(b))
#define luai_numlt(a,b) ((a)<(b))
#define luai_numle(a,b) ((a)<=(b))
#define luai_numisnan(a) (!luai_numeq((a), (a)))
#endif #endif
#if defined(ltable_c) && !defined(luai_hashnum)
#include <float.h>
#include <math.h>
#define luai_hashnum(i,n) { int e; \
n = l_mathop(frexp)(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP); \
lua_number2int(i, n); i += e; }
#endif
/* /*
** macro to control inclusion of some hard tests on stack reallocation ** macro to control inclusion of some hard tests on stack reallocation
*/ */
#if !defined(HARDSTACKTESTS) #if !defined(HARDSTACKTESTS)
#define condmovestack(L) ((void)0) #define condmovestack(L,pre,pos) ((void)0)
#else #else
/* realloc stack keeping its size */ /* realloc stack keeping its size */
#define condmovestack(L) luaD_reallocstack((L), (L)->stacksize) #define condmovestack(L,pre,pos) \
{ int sz_ = (L)->stacksize; pre; luaD_reallocstack((L), sz_); pos; }
#endif #endif
#if !defined(HARDMEMTESTS) #if !defined(HARDMEMTESTS)
#define condchangemem(L) condmovestack(L) #define condchangemem(L,pre,pos) ((void)0)
#else #else
#define condchangemem(L) \ #define condchangemem(L,pre,pos) \
((void)(!(G(L)->gcrunning) || (luaC_fullgc(L, 0), 1))) { if (G(L)->gcrunning) { pre; luaC_fullgc(L, 0); pos; } }
#endif #endif
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: lmem.h,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lmem.h,v 1.43 2014/12/19 17:26:14 roberto Exp $
** Interface to Memory Manager ** Interface to Memory Manager
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -15,20 +15,32 @@
/* /*
** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is ** This macro reallocs a vector 'b' from 'on' to 'n' elements, where
** always constant. ** each element has size 'e'. In case of arithmetic overflow of the
** The macro is somewhat complex to avoid warnings: ** product 'n'*'e', it raises an error (calling 'luaM_toobig'). Because
** +1 avoids warnings of "comparison has constant result"; ** 'e' is always constant, it avoids the runtime division MAX_SIZET/(e).
** cast to 'void' avoids warnings of "value unused". **
** (The macro is somewhat complex to avoid warnings: The 'sizeof'
** comparison avoids a runtime comparison when overflow cannot occur.
** The compiler should be able to optimize the real test by itself, but
** when it does it, it may give a warning about "comparison is always
** false due to limited range of data type"; the +1 tricks the compiler,
** avoiding this warning but also this optimization.)
*/ */
#define luaM_reallocv(L,b,on,n,e) \ #define luaM_reallocv(L,b,on,n,e) \
(cast(void, \ (((sizeof(n) >= sizeof(size_t) && cast(size_t, (n)) + 1 > MAX_SIZET/(e)) \
(cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \ ? luaM_toobig(L) : cast_void(0)) , \
luaM_realloc_(L, (b), (on)*(e), (n)*(e))) luaM_realloc_(L, (b), (on)*(e), (n)*(e)))
/*
** Arrays of chars do not need any test
*/
#define luaM_reallocvchar(L,b,on,n) \
cast(char *, luaM_realloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))
#define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0) #define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0)
#define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0) #define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0)
#define luaM_freearray(L, b, n) luaM_reallocv(L, (b), n, 0, sizeof((b)[0])) #define luaM_freearray(L, b, n) luaM_realloc_(L, (b), (n)*sizeof(*(b)), 0)
#define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s)) #define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s))
#define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t))) #define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t)))

@ -1,5 +1,5 @@
/* /*
** $Id: lobject.h,v 2.71.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lobject.h,v 2.116 2015/11/03 18:33:10 roberto Exp $
** Type definitions for Lua objects ** Type definitions for Lua objects
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -19,14 +19,13 @@
/* /*
** Extra tags for non-values ** Extra tags for non-values
*/ */
#define LUA_TPROTO LUA_NUMTAGS #define LUA_TPROTO LUA_NUMTAGS /* function prototypes */
#define LUA_TUPVAL (LUA_NUMTAGS+1) #define LUA_TDEADKEY (LUA_NUMTAGS+1) /* removed keys in tables */
#define LUA_TDEADKEY (LUA_NUMTAGS+2)
/* /*
** number of all possible tags (including LUA_TNONE but excluding DEADKEY) ** number of all possible tags (including LUA_TNONE but excluding DEADKEY)
*/ */
#define LUA_TOTALTAGS (LUA_TUPVAL+2) #define LUA_TOTALTAGS (LUA_TPROTO + 2)
/* /*
@ -36,8 +35,6 @@
** bit 6: whether value is collectable ** bit 6: whether value is collectable
*/ */
#define VARBITS (3 << 4)
/* /*
** LUA_TFUNCTION variants: ** LUA_TFUNCTION variants:
@ -57,6 +54,11 @@
#define LUA_TLNGSTR (LUA_TSTRING | (1 << 4)) /* long strings */ #define LUA_TLNGSTR (LUA_TSTRING | (1 << 4)) /* long strings */
/* Variant tags for numbers */
#define LUA_TNUMFLT (LUA_TNUMBER | (0 << 4)) /* float numbers */
#define LUA_TNUMINT (LUA_TNUMBER | (1 << 4)) /* integer numbers */
/* Bit mark for collectable types */ /* Bit mark for collectable types */
#define BIT_ISCOLLECTABLE (1 << 6) #define BIT_ISCOLLECTABLE (1 << 6)
@ -65,9 +67,9 @@
/* /*
** Union of all collectable objects ** Common type for all collectable objects
*/ */
typedef union GCObject GCObject; typedef struct GCObject GCObject;
/* /*
@ -78,21 +80,12 @@ typedef union GCObject GCObject;
/* /*
** Common header in struct form ** Common type has only the common header
*/ */
typedef struct GCheader { struct GCObject {
CommonHeader; CommonHeader;
} GCheader; };
/*
** Union of all Lua values
*/
typedef union Value Value;
#define numfield lua_Number n; /* numbers */
@ -101,9 +94,26 @@ typedef union Value Value;
** an actual value plus a tag with its type. ** an actual value plus a tag with its type.
*/ */
/*
** Union of all Lua values
*/
typedef union Value {
GCObject *gc; /* collectable objects */
void *p; /* light userdata */
int b; /* booleans */
lua_CFunction f; /* light C functions */
lua_Integer i; /* integer numbers */
lua_Number n; /* float numbers */
} Value;
#define TValuefields Value value_; int tt_ #define TValuefields Value value_; int tt_
typedef struct lua_TValue TValue;
typedef struct lua_TValue {
TValuefields;
} TValue;
/* macro defining a nil value */ /* macro defining a nil value */
@ -111,7 +121,6 @@ typedef struct lua_TValue TValue;
#define val_(o) ((o)->value_) #define val_(o) ((o)->value_)
#define num_(o) (val_(o).n)
/* raw type tag of a TValue */ /* raw type tag of a TValue */
@ -124,13 +133,15 @@ typedef struct lua_TValue TValue;
#define ttype(o) (rttype(o) & 0x3F) #define ttype(o) (rttype(o) & 0x3F)
/* type tag of a TValue with no variants (bits 0-3) */ /* type tag of a TValue with no variants (bits 0-3) */
#define ttypenv(o) (novariant(rttype(o))) #define ttnov(o) (novariant(rttype(o)))
/* Macros to test type */ /* Macros to test type */
#define checktag(o,t) (rttype(o) == (t)) #define checktag(o,t) (rttype(o) == (t))
#define checktype(o,t) (ttypenv(o) == (t)) #define checktype(o,t) (ttnov(o) == (t))
#define ttisnumber(o) checktag((o), LUA_TNUMBER) #define ttisnumber(o) checktype((o), LUA_TNUMBER)
#define ttisfloat(o) checktag((o), LUA_TNUMFLT)
#define ttisinteger(o) checktag((o), LUA_TNUMINT)
#define ttisnil(o) checktag((o), LUA_TNIL) #define ttisnil(o) checktag((o), LUA_TNIL)
#define ttisboolean(o) checktag((o), LUA_TBOOLEAN) #define ttisboolean(o) checktag((o), LUA_TBOOLEAN)
#define ttislightuserdata(o) checktag((o), LUA_TLIGHTUSERDATA) #define ttislightuserdata(o) checktag((o), LUA_TLIGHTUSERDATA)
@ -143,27 +154,27 @@ typedef struct lua_TValue TValue;
#define ttisCclosure(o) checktag((o), ctb(LUA_TCCL)) #define ttisCclosure(o) checktag((o), ctb(LUA_TCCL))
#define ttisLclosure(o) checktag((o), ctb(LUA_TLCL)) #define ttisLclosure(o) checktag((o), ctb(LUA_TLCL))
#define ttislcf(o) checktag((o), LUA_TLCF) #define ttislcf(o) checktag((o), LUA_TLCF)
#define ttisuserdata(o) checktag((o), ctb(LUA_TUSERDATA)) #define ttisfulluserdata(o) checktag((o), ctb(LUA_TUSERDATA))
#define ttisthread(o) checktag((o), ctb(LUA_TTHREAD)) #define ttisthread(o) checktag((o), ctb(LUA_TTHREAD))
#define ttisdeadkey(o) checktag((o), LUA_TDEADKEY) #define ttisdeadkey(o) checktag((o), LUA_TDEADKEY)
#define ttisequal(o1,o2) (rttype(o1) == rttype(o2))
/* Macros to access values */ /* Macros to access values */
#define nvalue(o) check_exp(ttisnumber(o), num_(o)) #define ivalue(o) check_exp(ttisinteger(o), val_(o).i)
#define fltvalue(o) check_exp(ttisfloat(o), val_(o).n)
#define nvalue(o) check_exp(ttisnumber(o), \
(ttisinteger(o) ? cast_num(ivalue(o)) : fltvalue(o)))
#define gcvalue(o) check_exp(iscollectable(o), val_(o).gc) #define gcvalue(o) check_exp(iscollectable(o), val_(o).gc)
#define pvalue(o) check_exp(ttislightuserdata(o), val_(o).p) #define pvalue(o) check_exp(ttislightuserdata(o), val_(o).p)
#define rawtsvalue(o) check_exp(ttisstring(o), &val_(o).gc->ts) #define tsvalue(o) check_exp(ttisstring(o), gco2ts(val_(o).gc))
#define tsvalue(o) (&rawtsvalue(o)->tsv) #define uvalue(o) check_exp(ttisfulluserdata(o), gco2u(val_(o).gc))
#define rawuvalue(o) check_exp(ttisuserdata(o), &val_(o).gc->u) #define clvalue(o) check_exp(ttisclosure(o), gco2cl(val_(o).gc))
#define uvalue(o) (&rawuvalue(o)->uv) #define clLvalue(o) check_exp(ttisLclosure(o), gco2lcl(val_(o).gc))
#define clvalue(o) check_exp(ttisclosure(o), &val_(o).gc->cl) #define clCvalue(o) check_exp(ttisCclosure(o), gco2ccl(val_(o).gc))
#define clLvalue(o) check_exp(ttisLclosure(o), &val_(o).gc->cl.l)
#define clCvalue(o) check_exp(ttisCclosure(o), &val_(o).gc->cl.c)
#define fvalue(o) check_exp(ttislcf(o), val_(o).f) #define fvalue(o) check_exp(ttislcf(o), val_(o).f)
#define hvalue(o) check_exp(ttistable(o), &val_(o).gc->h) #define hvalue(o) check_exp(ttistable(o), gco2t(val_(o).gc))
#define bvalue(o) check_exp(ttisboolean(o), val_(o).b) #define bvalue(o) check_exp(ttisboolean(o), val_(o).b)
#define thvalue(o) check_exp(ttisthread(o), &val_(o).gc->th) #define thvalue(o) check_exp(ttisthread(o), gco2th(val_(o).gc))
/* a dead value may get the 'gc' field, but cannot access its contents */ /* a dead value may get the 'gc' field, but cannot access its contents */
#define deadvalue(o) check_exp(ttisdeadkey(o), cast(void *, val_(o).gc)) #define deadvalue(o) check_exp(ttisdeadkey(o), cast(void *, val_(o).gc))
@ -174,18 +185,27 @@ typedef struct lua_TValue TValue;
/* Macros for internal tests */ /* Macros for internal tests */
#define righttt(obj) (ttype(obj) == gcvalue(obj)->gch.tt) #define righttt(obj) (ttype(obj) == gcvalue(obj)->tt)
#define checkliveness(g,obj) \ #define checkliveness(L,obj) \
lua_longassert(!iscollectable(obj) || \ lua_longassert(!iscollectable(obj) || \
(righttt(obj) && !isdead(g,gcvalue(obj)))) (righttt(obj) && (L == NULL || !isdead(G(L),gcvalue(obj)))))
/* Macros to set values */ /* Macros to set values */
#define settt_(o,t) ((o)->tt_=(t)) #define settt_(o,t) ((o)->tt_=(t))
#define setnvalue(obj,x) \ #define setfltvalue(obj,x) \
{ TValue *io=(obj); num_(io)=(x); settt_(io, LUA_TNUMBER); } { TValue *io=(obj); val_(io).n=(x); settt_(io, LUA_TNUMFLT); }
#define chgfltvalue(obj,x) \
{ TValue *io=(obj); lua_assert(ttisfloat(io)); val_(io).n=(x); }
#define setivalue(obj,x) \
{ TValue *io=(obj); val_(io).i=(x); settt_(io, LUA_TNUMINT); }
#define chgivalue(obj,x) \
{ TValue *io=(obj); lua_assert(ttisinteger(io)); val_(io).i=(x); }
#define setnilvalue(obj) settt_(obj, LUA_TNIL) #define setnilvalue(obj) settt_(obj, LUA_TNIL)
@ -199,48 +219,46 @@ typedef struct lua_TValue TValue;
{ TValue *io=(obj); val_(io).b=(x); settt_(io, LUA_TBOOLEAN); } { TValue *io=(obj); val_(io).b=(x); settt_(io, LUA_TBOOLEAN); }
#define setgcovalue(L,obj,x) \ #define setgcovalue(L,obj,x) \
{ TValue *io=(obj); GCObject *i_g=(x); \ { TValue *io = (obj); GCObject *i_g=(x); \
val_(io).gc=i_g; settt_(io, ctb(gch(i_g)->tt)); } val_(io).gc = i_g; settt_(io, ctb(i_g->tt)); }
#define setsvalue(L,obj,x) \ #define setsvalue(L,obj,x) \
{ TValue *io=(obj); \ { TValue *io = (obj); TString *x_ = (x); \
TString *x_ = (x); \ val_(io).gc = obj2gco(x_); settt_(io, ctb(x_->tt)); \
val_(io).gc=cast(GCObject *, x_); settt_(io, ctb(x_->tsv.tt)); \ checkliveness(L,io); }
checkliveness(G(L),io); }
#define setuvalue(L,obj,x) \ #define setuvalue(L,obj,x) \
{ TValue *io=(obj); \ { TValue *io = (obj); Udata *x_ = (x); \
val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TUSERDATA)); \ val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TUSERDATA)); \
checkliveness(G(L),io); } checkliveness(L,io); }
#define setthvalue(L,obj,x) \ #define setthvalue(L,obj,x) \
{ TValue *io=(obj); \ { TValue *io = (obj); lua_State *x_ = (x); \
val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTHREAD)); \ val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTHREAD)); \
checkliveness(G(L),io); } checkliveness(L,io); }
#define setclLvalue(L,obj,x) \ #define setclLvalue(L,obj,x) \
{ TValue *io=(obj); \ { TValue *io = (obj); LClosure *x_ = (x); \
val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TLCL)); \ val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TLCL)); \
checkliveness(G(L),io); } checkliveness(L,io); }
#define setclCvalue(L,obj,x) \ #define setclCvalue(L,obj,x) \
{ TValue *io=(obj); \ { TValue *io = (obj); CClosure *x_ = (x); \
val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TCCL)); \ val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TCCL)); \
checkliveness(G(L),io); } checkliveness(L,io); }
#define sethvalue(L,obj,x) \ #define sethvalue(L,obj,x) \
{ TValue *io=(obj); \ { TValue *io = (obj); Table *x_ = (x); \
val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTABLE)); \ val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTABLE)); \
checkliveness(G(L),io); } checkliveness(L,io); }
#define setdeadvalue(obj) settt_(obj, LUA_TDEADKEY) #define setdeadvalue(obj) settt_(obj, LUA_TDEADKEY)
#define setobj(L,obj1,obj2) \ #define setobj(L,obj1,obj2) \
{ const TValue *io2=(obj2); TValue *io1=(obj1); \ { TValue *io1=(obj1); *io1 = *(obj2); \
io1->value_ = io2->value_; io1->tt_ = io2->tt_; \ (void)L; checkliveness(L,io1); }
checkliveness(G(L),io1); }
/* /*
@ -256,188 +274,110 @@ typedef struct lua_TValue TValue;
#define setptvalue2s setptvalue #define setptvalue2s setptvalue
/* from table to same table */ /* from table to same table */
#define setobjt2t setobj #define setobjt2t setobj
/* to table */
#define setobj2t setobj
/* to new object */ /* to new object */
#define setobj2n setobj #define setobj2n setobj
#define setsvalue2n setsvalue #define setsvalue2n setsvalue
/* to table (define it as an expression to be used in macros) */
#define setobj2t(L,o1,o2) ((void)L, *(o1)=*(o2), checkliveness(L,(o1)))
/* check whether a number is valid (useful only for NaN trick) */
#define luai_checknum(L,o,c) { /* empty */ }
/* /*
** {====================================================== ** {======================================================
** NaN Trick ** types and prototypes
** ======================================================= ** =======================================================
*/ */
#if defined(LUA_NANTRICK)
/*
** numbers are represented in the 'd_' field. All other values have the
** value (NNMARK | tag) in 'tt__'. A number with such pattern would be
** a "signaled NaN", which is never generated by regular operations by
** the CPU (nor by 'strtod')
*/
/* allows for external implementation for part of the trick */
#if !defined(NNMARK) /* { */
#if !defined(LUA_IEEEENDIAN)
#error option 'LUA_NANTRICK' needs 'LUA_IEEEENDIAN'
#endif
#define NNMARK 0x7FF7A500
#define NNMASK 0x7FFFFF00
#undef TValuefields
#undef NILCONSTANT
#if (LUA_IEEEENDIAN == 0) /* { */
/* little endian */
#define TValuefields \
union { struct { Value v__; int tt__; } i; double d__; } u
#define NILCONSTANT {{{NULL}, tag2tt(LUA_TNIL)}}
/* field-access macros */
#define v_(o) ((o)->u.i.v__)
#define d_(o) ((o)->u.d__)
#define tt_(o) ((o)->u.i.tt__)
#else /* }{ */
/* big endian */
#define TValuefields \
union { struct { int tt__; Value v__; } i; double d__; } u
#define NILCONSTANT {{tag2tt(LUA_TNIL), {NULL}}}
/* field-access macros */
#define v_(o) ((o)->u.i.v__)
#define d_(o) ((o)->u.d__)
#define tt_(o) ((o)->u.i.tt__)
#endif /* } */
#endif /* } */
/* correspondence with standard representation */ typedef TValue *StkId; /* index to stack elements */
#undef val_
#define val_(o) v_(o)
#undef num_
#define num_(o) d_(o)
#undef numfield
#define numfield /* no such field; numbers are the entire struct */
/* basic check to distinguish numbers from non-numbers */
#undef ttisnumber
#define ttisnumber(o) ((tt_(o) & NNMASK) != NNMARK)
#define tag2tt(t) (NNMARK | (t))
#undef rttype
#define rttype(o) (ttisnumber(o) ? LUA_TNUMBER : tt_(o) & 0xff)
#undef settt_
#define settt_(o,t) (tt_(o) = tag2tt(t))
#undef setnvalue
#define setnvalue(obj,x) \
{ TValue *io_=(obj); num_(io_)=(x); lua_assert(ttisnumber(io_)); }
#undef setobj
#define setobj(L,obj1,obj2) \
{ const TValue *o2_=(obj2); TValue *o1_=(obj1); \
o1_->u = o2_->u; \
checkliveness(G(L),o1_); }
/* /*
** these redefinitions are not mandatory, but these forms are more efficient ** Header for string value; string bytes follow the end of this structure
** (aligned according to 'UTString'; see next).
*/ */
typedef struct TString {
#undef checktag CommonHeader;
#undef checktype lu_byte extra; /* reserved words for short strings; "has hash" for longs */
#define checktag(o,t) (tt_(o) == tag2tt(t)) lu_byte shrlen; /* length for short strings */
#define checktype(o,t) (ctb(tt_(o) | VARBITS) == ctb(tag2tt(t) | VARBITS)) unsigned int hash;
union {
#undef ttisequal size_t lnglen; /* length for long strings */
#define ttisequal(o1,o2) \ struct TString *hnext; /* linked list for hash table */
(ttisnumber(o1) ? ttisnumber(o2) : (tt_(o1) == tt_(o2))) } u;
} TString;
#undef luai_checknum
#define luai_checknum(L,o,c) { if (!ttisnumber(o)) c; }
#endif
/* }====================================================== */
/* /*
** {====================================================== ** Ensures that address after this type is always fully aligned.
** types and prototypes
** =======================================================
*/ */
typedef union UTString {
L_Umaxalign dummy; /* ensures maximum alignment for strings */
TString tsv;
} UTString;
union Value { /*
GCObject *gc; /* collectable objects */ ** Get the actual string (array of bytes) from a 'TString'.
void *p; /* light userdata */ ** (Access to 'extra' ensures that value is really a 'TString'.)
int b; /* booleans */ */
lua_CFunction f; /* light C functions */ #define getstr(ts) \
numfield /* numbers */ check_exp(sizeof((ts)->extra), cast(char *, (ts)) + sizeof(UTString))
};
struct lua_TValue {
TValuefields;
};
typedef TValue *StkId; /* index to stack elements */ /* get the actual string (array of bytes) from a Lua value */
#define svalue(o) getstr(tsvalue(o))
/* get string length from 'TString *s' */
#define tsslen(s) ((s)->tt == LUA_TSHRSTR ? (s)->shrlen : (s)->u.lnglen)
/* get string length from 'TValue *o' */
#define vslen(o) tsslen(tsvalue(o))
/* /*
** Header for string value; string bytes follow the end of this structure ** Header for userdata; memory area follows the end of this structure
** (aligned according to 'UUdata'; see next).
*/ */
typedef union TString { typedef struct Udata {
L_Umaxalign dummy; /* ensures maximum alignment for strings */ CommonHeader;
struct { lu_byte ttuv_; /* user value's tag */
CommonHeader; struct Table *metatable;
lu_byte extra; /* reserved words for short strings; "has hash" for longs */ size_t len; /* number of bytes */
unsigned int hash; union Value user_; /* user value */
size_t len; /* number of characters in string */ } Udata;
} tsv;
} TString;
/* get the actual string (array of bytes) from a TString */
#define getstr(ts) cast(const char *, (ts) + 1)
/* get the actual string (array of bytes) from a Lua value */ /*
#define svalue(o) getstr(rawtsvalue(o)) ** Ensures that address after this type is always fully aligned.
*/
typedef union UUdata {
L_Umaxalign dummy; /* ensures maximum alignment for 'local' udata */
Udata uv;
} UUdata;
/* /*
** Header for userdata; memory area follows the end of this structure ** Get the address of memory block inside 'Udata'.
** (Access to 'ttuv_' ensures that value is really a 'Udata'.)
*/ */
typedef union Udata { #define getudatamem(u) \
L_Umaxalign dummy; /* ensures maximum alignment for `local' udata */ check_exp(sizeof((u)->ttuv_), (cast(char*, (u)) + sizeof(UUdata)))
struct {
CommonHeader; #define setuservalue(L,u,o) \
struct Table *metatable; { const TValue *io=(o); Udata *iu = (u); \
struct Table *env; iu->user_ = io->value_; iu->ttuv_ = rttype(io); \
size_t len; /* number of bytes */ checkliveness(L,io); }
} uv;
} Udata;
#define getuservalue(L,u,o) \
{ TValue *io=(o); const Udata *iu = (u); \
io->value_ = iu->user_; settt_(io, iu->ttuv_); \
checkliveness(L,io); }
/* /*
@ -445,7 +385,7 @@ typedef union Udata {
*/ */
typedef struct Upvaldesc { typedef struct Upvaldesc {
TString *name; /* upvalue name (for debug information) */ TString *name; /* upvalue name (for debug information) */
lu_byte instack; /* whether it is in stack */ lu_byte instack; /* whether it is in stack (register) */
lu_byte idx; /* index of upvalue (in stack or in outer function's list) */ lu_byte idx; /* index of upvalue (in stack or in outer function's list) */
} Upvaldesc; } Upvaldesc;
@ -466,26 +406,26 @@ typedef struct LocVar {
*/ */
typedef struct Proto { typedef struct Proto {
CommonHeader; CommonHeader;
lu_byte numparams; /* number of fixed parameters */
lu_byte is_vararg; /* 2: declared vararg; 1: uses vararg */
lu_byte maxstacksize; /* number of registers needed by this function */
int sizeupvalues; /* size of 'upvalues' */
int sizek; /* size of 'k' */
int sizecode;
int sizelineinfo;
int sizep; /* size of 'p' */
int sizelocvars;
int linedefined; /* debug information */
int lastlinedefined; /* debug information */
TValue *k; /* constants used by the function */ TValue *k; /* constants used by the function */
Instruction *code; Instruction *code; /* opcodes */
struct Proto **p; /* functions defined inside the function */ struct Proto **p; /* functions defined inside the function */
int *lineinfo; /* map from opcodes to source lines (debug information) */ int *lineinfo; /* map from opcodes to source lines (debug information) */
LocVar *locvars; /* information about local variables (debug information) */ LocVar *locvars; /* information about local variables (debug information) */
Upvaldesc *upvalues; /* upvalue information */ Upvaldesc *upvalues; /* upvalue information */
union Closure *cache; /* last created closure with this prototype */ struct LClosure *cache; /* last-created closure with this prototype */
TString *source; /* used for debug information */ TString *source; /* used for debug information */
int sizeupvalues; /* size of 'upvalues' */
int sizek; /* size of `k' */
int sizecode;
int sizelineinfo;
int sizep; /* size of `p' */
int sizelocvars;
int linedefined;
int lastlinedefined;
GCObject *gclist; GCObject *gclist;
lu_byte numparams; /* number of fixed parameters */
lu_byte is_vararg;
lu_byte maxstacksize; /* maximum stack used by this function */
} Proto; } Proto;
@ -493,17 +433,7 @@ typedef struct Proto {
/* /*
** Lua Upvalues ** Lua Upvalues
*/ */
typedef struct UpVal { typedef struct UpVal UpVal;
CommonHeader;
TValue *v; /* points to stack or to its own value */
union {
TValue value; /* the value (when closed) */
struct { /* double linked list (when open) */
struct UpVal *prev;
struct UpVal *next;
} l;
} u;
} UpVal;
/* /*
@ -545,12 +475,19 @@ typedef union Closure {
typedef union TKey { typedef union TKey {
struct { struct {
TValuefields; TValuefields;
struct Node *next; /* for chaining */ int next; /* for chaining (offset for next node) */
} nk; } nk;
TValue tvk; TValue tvk;
} TKey; } TKey;
/* copy a value into a key without messing up field 'next' */
#define setnodekey(L,key,obj) \
{ TKey *k_=(key); const TValue *io_=(obj); \
k_->nk.value_ = io_->value_; k_->nk.tt_ = io_->tt_; \
(void)L; checkliveness(L,io_); }
typedef struct Node { typedef struct Node {
TValue i_val; TValue i_val;
TKey i_key; TKey i_key;
@ -560,19 +497,19 @@ typedef struct Node {
typedef struct Table { typedef struct Table {
CommonHeader; CommonHeader;
lu_byte flags; /* 1<<p means tagmethod(p) is not present */ lu_byte flags; /* 1<<p means tagmethod(p) is not present */
lu_byte lsizenode; /* log2 of size of `node' array */ lu_byte lsizenode; /* log2 of size of 'node' array */
struct Table *metatable; unsigned int sizearray; /* size of 'array' array */
TValue *array; /* array part */ TValue *array; /* array part */
Node *node; Node *node;
Node *lastfree; /* any free position is before this position */ Node *lastfree; /* any free position is before this position */
struct Table *metatable;
GCObject *gclist; GCObject *gclist;
int sizearray; /* size of `array' array */
} Table; } Table;
/* /*
** `module' operation for hashing (size is always a power of 2) ** 'module' operation for hashing (size is always a power of 2)
*/ */
#define lmod(s,size) \ #define lmod(s,size) \
(check_exp((size&(size-1))==0, (cast(int, (s) & ((size)-1))))) (check_exp((size&(size-1))==0, (cast(int, (s) & ((size)-1)))))
@ -590,13 +527,18 @@ typedef struct Table {
LUAI_DDEC const TValue luaO_nilobject_; LUAI_DDEC const TValue luaO_nilobject_;
/* size of buffer for 'luaO_utf8esc' function */
#define UTF8BUFFSZ 8
LUAI_FUNC int luaO_int2fb (unsigned int x); LUAI_FUNC int luaO_int2fb (unsigned int x);
LUAI_FUNC int luaO_fb2int (int x); LUAI_FUNC int luaO_fb2int (int x);
LUAI_FUNC int luaO_utf8esc (char *buff, unsigned long x);
LUAI_FUNC int luaO_ceillog2 (unsigned int x); LUAI_FUNC int luaO_ceillog2 (unsigned int x);
LUAI_FUNC lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2); LUAI_FUNC void luaO_arith (lua_State *L, int op, const TValue *p1,
LUAI_FUNC int luaO_str2d (const char *s, size_t len, lua_Number *result); const TValue *p2, TValue *res);
LUAI_FUNC size_t luaO_str2num (const char *s, TValue *o);
LUAI_FUNC int luaO_hexavalue (int c); LUAI_FUNC int luaO_hexavalue (int c);
LUAI_FUNC void luaO_tostring (lua_State *L, StkId obj);
LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt, LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
va_list argp); va_list argp);
LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...); LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);

@ -1,5 +1,5 @@
/* /*
** $Id: lopcodes.h,v 1.142.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lopcodes.h,v 1.148 2014/10/25 11:50:46 roberto Exp $
** Opcodes for Lua virtual machine ** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -14,12 +14,12 @@
We assume that instructions are unsigned numbers. We assume that instructions are unsigned numbers.
All instructions have an opcode in the first 6 bits. All instructions have an opcode in the first 6 bits.
Instructions can have the following fields: Instructions can have the following fields:
`A' : 8 bits 'A' : 8 bits
`B' : 9 bits 'B' : 9 bits
`C' : 9 bits 'C' : 9 bits
'Ax' : 26 bits ('A', 'B', and 'C' together) 'Ax' : 26 bits ('A', 'B', and 'C' together)
`Bx' : 18 bits (`B' and `C' together) 'Bx' : 18 bits ('B' and 'C' together)
`sBx' : signed Bx 'sBx' : signed Bx
A signed argument is represented in excess K; that is, the number A signed argument is represented in excess K; that is, the number
value is the unsigned value minus K. K is exactly the maximum value value is the unsigned value minus K. K is exactly the maximum value
@ -58,7 +58,7 @@ enum OpMode {iABC, iABx, iAsBx, iAx}; /* basic instruction format */
*/ */
#if SIZE_Bx < LUAI_BITSINT-1 #if SIZE_Bx < LUAI_BITSINT-1
#define MAXARG_Bx ((1<<SIZE_Bx)-1) #define MAXARG_Bx ((1<<SIZE_Bx)-1)
#define MAXARG_sBx (MAXARG_Bx>>1) /* `sBx' is signed */ #define MAXARG_sBx (MAXARG_Bx>>1) /* 'sBx' is signed */
#else #else
#define MAXARG_Bx MAX_INT #define MAXARG_Bx MAX_INT
#define MAXARG_sBx MAX_INT #define MAXARG_sBx MAX_INT
@ -76,10 +76,10 @@ enum OpMode {iABC, iABx, iAsBx, iAx}; /* basic instruction format */
#define MAXARG_C ((1<<SIZE_C)-1) #define MAXARG_C ((1<<SIZE_C)-1)
/* creates a mask with `n' 1 bits at position `p' */ /* creates a mask with 'n' 1 bits at position 'p' */
#define MASK1(n,p) ((~((~(Instruction)0)<<(n)))<<(p)) #define MASK1(n,p) ((~((~(Instruction)0)<<(n)))<<(p))
/* creates a mask with `n' 0 bits at position `p' */ /* creates a mask with 'n' 0 bits at position 'p' */
#define MASK0(n,p) (~MASK1(n,p)) #define MASK0(n,p) (~MASK1(n,p))
/* /*
@ -187,16 +187,23 @@ OP_SELF,/* A B C R(A+1) := R(B); R(A) := R(B)[RK(C)] */
OP_ADD,/* A B C R(A) := RK(B) + RK(C) */ OP_ADD,/* A B C R(A) := RK(B) + RK(C) */
OP_SUB,/* A B C R(A) := RK(B) - RK(C) */ OP_SUB,/* A B C R(A) := RK(B) - RK(C) */
OP_MUL,/* A B C R(A) := RK(B) * RK(C) */ OP_MUL,/* A B C R(A) := RK(B) * RK(C) */
OP_DIV,/* A B C R(A) := RK(B) / RK(C) */
OP_MOD,/* A B C R(A) := RK(B) % RK(C) */ OP_MOD,/* A B C R(A) := RK(B) % RK(C) */
OP_POW,/* A B C R(A) := RK(B) ^ RK(C) */ OP_POW,/* A B C R(A) := RK(B) ^ RK(C) */
OP_DIV,/* A B C R(A) := RK(B) / RK(C) */
OP_IDIV,/* A B C R(A) := RK(B) // RK(C) */
OP_BAND,/* A B C R(A) := RK(B) & RK(C) */
OP_BOR,/* A B C R(A) := RK(B) | RK(C) */
OP_BXOR,/* A B C R(A) := RK(B) ~ RK(C) */
OP_SHL,/* A B C R(A) := RK(B) << RK(C) */
OP_SHR,/* A B C R(A) := RK(B) >> RK(C) */
OP_UNM,/* A B R(A) := -R(B) */ OP_UNM,/* A B R(A) := -R(B) */
OP_BNOT,/* A B R(A) := ~R(B) */
OP_NOT,/* A B R(A) := not R(B) */ OP_NOT,/* A B R(A) := not R(B) */
OP_LEN,/* A B R(A) := length of R(B) */ OP_LEN,/* A B R(A) := length of R(B) */
OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */ OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */
OP_JMP,/* A sBx pc+=sBx; if (A) close all upvalues >= R(A) + 1 */ OP_JMP,/* A sBx pc+=sBx; if (A) close all upvalues >= R(A - 1) */
OP_EQ,/* A B C if ((RK(B) == RK(C)) ~= A) then pc++ */ OP_EQ,/* A B C if ((RK(B) == RK(C)) ~= A) then pc++ */
OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */ OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */
OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */ OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */
@ -231,16 +238,16 @@ OP_EXTRAARG/* Ax extra (larger) argument for previous opcode */
/*=========================================================================== /*===========================================================================
Notes: Notes:
(*) In OP_CALL, if (B == 0) then B = top. If (C == 0), then `top' is (*) In OP_CALL, if (B == 0) then B = top. If (C == 0), then 'top' is
set to last_result+1, so next open instruction (OP_CALL, OP_RETURN, set to last_result+1, so next open instruction (OP_CALL, OP_RETURN,
OP_SETLIST) may use `top'. OP_SETLIST) may use 'top'.
(*) In OP_VARARG, if (B == 0) then use actual number of varargs and (*) In OP_VARARG, if (B == 0) then use actual number of varargs and
set top (like in OP_CALL with C == 0). set top (like in OP_CALL with C == 0).
(*) In OP_RETURN, if (B == 0) then return up to `top'. (*) In OP_RETURN, if (B == 0) then return up to 'top'.
(*) In OP_SETLIST, if (B == 0) then B = `top'; if (C == 0) then next (*) In OP_SETLIST, if (B == 0) then B = 'top'; if (C == 0) then next
'instruction' is EXTRAARG(real C). 'instruction' is EXTRAARG(real C).
(*) In OP_LOADKX, the next 'instruction' is always EXTRAARG. (*) In OP_LOADKX, the next 'instruction' is always EXTRAARG.
@ -248,7 +255,7 @@ OP_EXTRAARG/* Ax extra (larger) argument for previous opcode */
(*) For comparisons, A specifies what condition the test should accept (*) For comparisons, A specifies what condition the test should accept
(true or false). (true or false).
(*) All `skips' (pc++) assume that next instruction is a jump. (*) All 'skips' (pc++) assume that next instruction is a jump.
===========================================================================*/ ===========================================================================*/

@ -1,5 +1,5 @@
/* /*
** $Id: lparser.h,v 1.70.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lparser.h,v 1.76 2015/12/30 18:16:13 roberto Exp $
** Lua Parser ** Lua Parser
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,24 +13,38 @@
/* /*
** Expression descriptor ** Expression and variable descriptor.
** Code generation for variables and expressions can be delayed to allow
** optimizations; An 'expdesc' structure describes a potentially-delayed
** variable/expression. It has a description of its "main" value plus a
** list of conditional jumps that can also produce its value (generated
** by short-circuit operators 'and'/'or').
*/ */
/* kinds of variables/expressions */
typedef enum { typedef enum {
VVOID, /* no value */ VVOID, /* when 'expdesc' describes the last expression a list,
VNIL, this kind means an empty list (so, no expression) */
VTRUE, VNIL, /* constant nil */
VFALSE, VTRUE, /* constant true */
VK, /* info = index of constant in `k' */ VFALSE, /* constant false */
VKNUM, /* nval = numerical value */ VK, /* constant in 'k'; info = index of constant in 'k' */
VNONRELOC, /* info = result register */ VKFLT, /* floating constant; nval = numerical float value */
VLOCAL, /* info = local register */ VKINT, /* integer constant; nval = numerical integer value */
VUPVAL, /* info = index of upvalue in 'upvalues' */ VNONRELOC, /* expression has its value in a fixed register;
VINDEXED, /* t = table register/upvalue; idx = index R/K */ info = result register */
VJMP, /* info = instruction pc */ VLOCAL, /* local variable; info = local register */
VRELOCABLE, /* info = instruction pc */ VUPVAL, /* upvalue variable; info = index of upvalue in 'upvalues' */
VCALL, /* info = instruction pc */ VINDEXED, /* indexed variable;
VVARARG /* info = instruction pc */ ind.vt = whether 't' is register or upvalue;
ind.t = table register or upvalue;
ind.idx = key's R/K index */
VJMP, /* expression is a test/comparison;
info = pc of corresponding jump instruction */
VRELOCABLE, /* expression can put result in any register;
info = instruction pc */
VCALL, /* expression is a function call; info = instruction pc */
VVARARG /* vararg expression; info = instruction pc */
} expkind; } expkind;
@ -40,16 +54,17 @@ typedef enum {
typedef struct expdesc { typedef struct expdesc {
expkind k; expkind k;
union { union {
lua_Integer ival; /* for VKINT */
lua_Number nval; /* for VKFLT */
int info; /* for generic use */
struct { /* for indexed variables (VINDEXED) */ struct { /* for indexed variables (VINDEXED) */
short idx; /* index (R/K) */ short idx; /* index (R/K) */
lu_byte t; /* table (register or upvalue) */ lu_byte t; /* table (register or upvalue) */
lu_byte vt; /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */ lu_byte vt; /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */
} ind; } ind;
int info; /* for generic use */
lua_Number nval; /* for VKNUM */
} u; } u;
int t; /* patch list of `exit when true' */ int t; /* patch list of 'exit when true' */
int f; /* patch list of `exit when false' */ int f; /* patch list of 'exit when false' */
} expdesc; } expdesc;
@ -95,15 +110,14 @@ struct BlockCnt; /* defined in lparser.c */
/* state needed to generate code for a given function */ /* state needed to generate code for a given function */
typedef struct FuncState { typedef struct FuncState {
Proto *f; /* current function header */ Proto *f; /* current function header */
Table *h; /* table to find (and reuse) elements in `k' */
struct FuncState *prev; /* enclosing function */ struct FuncState *prev; /* enclosing function */
struct LexState *ls; /* lexical state */ struct LexState *ls; /* lexical state */
struct BlockCnt *bl; /* chain of current blocks */ struct BlockCnt *bl; /* chain of current blocks */
int pc; /* next position to code (equivalent to `ncode') */ int pc; /* next position to code (equivalent to 'ncode') */
int lasttarget; /* 'label' of last 'jump label' */ int lasttarget; /* 'label' of last 'jump label' */
int jpc; /* list of pending jumps to `pc' */ int jpc; /* list of pending jumps to 'pc' */
int nk; /* number of elements in `k' */ int nk; /* number of elements in 'k' */
int np; /* number of elements in `p' */ int np; /* number of elements in 'p' */
int firstlocal; /* index of first local var (in Dyndata array) */ int firstlocal; /* index of first local var (in Dyndata array) */
short nlocvars; /* number of elements in 'f->locvars' */ short nlocvars; /* number of elements in 'f->locvars' */
lu_byte nactvar; /* number of active local variables */ lu_byte nactvar; /* number of active local variables */
@ -112,8 +126,8 @@ typedef struct FuncState {
} FuncState; } FuncState;
LUAI_FUNC Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff, LUAI_FUNC LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
Dyndata *dyd, const char *name, int firstchar); Dyndata *dyd, const char *name, int firstchar);
#endif #endif

@ -0,0 +1,45 @@
/*
** $Id: lprefix.h,v 1.2 2014/12/29 16:54:13 roberto Exp $
** Definitions for Lua code that must come before any other header file
** See Copyright Notice in lua.h
*/
#ifndef lprefix_h
#define lprefix_h
/*
** Allows POSIX/XSI stuff
*/
#if !defined(LUA_USE_C89) /* { */
#if !defined(_XOPEN_SOURCE)
#define _XOPEN_SOURCE 600
#elif _XOPEN_SOURCE == 0
#undef _XOPEN_SOURCE /* use -D_XOPEN_SOURCE=0 to undefine it */
#endif
/*
** Allows manipulation of large files in gcc and some other compilers
*/
#if !defined(LUA_32BITS) && !defined(_FILE_OFFSET_BITS)
#define _LARGEFILE_SOURCE 1
#define _FILE_OFFSET_BITS 64
#endif
#endif /* } */
/*
** Windows stuff
*/
#if defined(_WIN32) /* { */
#if !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS /* avoid warnings about ISO C functions */
#endif
#endif /* } */
#endif

@ -1,5 +1,5 @@
/* /*
** $Id: lstate.h,v 2.82.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lstate.h,v 2.130 2015/12/16 16:39:38 roberto Exp $
** Global State ** Global State
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -16,25 +16,16 @@
/* /*
** Some notes about garbage-collected objects: All objects in Lua must ** Some notes about garbage-collected objects: All objects in Lua must
** be kept somehow accessible until being freed. ** be kept somehow accessible until being freed, so all objects always
** belong to one (and only one) of these lists, using field 'next' of
** the 'CommonHeader' for the link:
** **
** Lua keeps most objects linked in list g->allgc. The link uses field ** 'allgc': all objects not marked for finalization;
** 'next' of the CommonHeader. ** 'finobj': all objects marked for finalization;
** ** 'tobefnz': all objects ready to be finalized;
** Strings are kept in several lists headed by the array g->strt.hash. ** 'fixedgc': all objects that are not to be collected (currently
** ** only small strings, such as reserved words).
** Open upvalues are not subject to independent garbage collection. They
** are collected together with their respective threads. Lua keeps a
** double-linked list with all open upvalues (g->uvhead) so that it can
** mark objects referred by them. (They are always gray, so they must
** be remarked in the atomic step. Usually their contents would be marked
** when traversing the respective threads, but the thread may already be
** dead, while the upvalue is still accessible through closures.)
**
** Objects with finalizers are kept in the list g->finobj.
**
** The list g->tobefnz links all objects being finalized.
*/ */
@ -42,6 +33,15 @@
struct lua_longjmp; /* defined in ldo.c */ struct lua_longjmp; /* defined in ldo.c */
/*
** Atomic type (relative to signals) to better ensure that 'lua_sethook'
** is thread safe
*/
#if !defined(l_signalT)
#include <signal.h>
#define l_signalT sig_atomic_t
#endif
/* extra stack space to handle TM calls and some other extras */ /* extra stack space to handle TM calls and some other extras */
#define EXTRA_STACK 5 #define EXTRA_STACK 5
@ -53,66 +53,72 @@ struct lua_longjmp; /* defined in ldo.c */
/* kinds of Garbage Collection */ /* kinds of Garbage Collection */
#define KGC_NORMAL 0 #define KGC_NORMAL 0
#define KGC_EMERGENCY 1 /* gc was forced by an allocation failure */ #define KGC_EMERGENCY 1 /* gc was forced by an allocation failure */
#define KGC_GEN 2 /* generational collection */
typedef struct stringtable { typedef struct stringtable {
GCObject **hash; TString **hash;
lu_int32 nuse; /* number of elements */ int nuse; /* number of elements */
int size; int size;
} stringtable; } stringtable;
/* /*
** information about a call ** Information about a call.
** When a thread yields, 'func' is adjusted to pretend that the
** top function has only the yielded values in its stack; in that
** case, the actual 'func' value is saved in field 'extra'.
** When a function calls another with a continuation, 'extra' keeps
** the function index so that, in case of errors, the continuation
** function can be called with the correct top.
*/ */
typedef struct CallInfo { typedef struct CallInfo {
StkId func; /* function index in the stack */ StkId func; /* function index in the stack */
StkId top; /* top for this function */ StkId top; /* top for this function */
struct CallInfo *previous, *next; /* dynamic call link */ struct CallInfo *previous, *next; /* dynamic call link */
short nresults; /* expected number of results from this function */
lu_byte callstatus;
ptrdiff_t extra;
union { union {
struct { /* only for Lua functions */ struct { /* only for Lua functions */
StkId base; /* base for this function */ StkId base; /* base for this function */
const Instruction *savedpc; const Instruction *savedpc;
} l; } l;
struct { /* only for C functions */ struct { /* only for C functions */
int ctx; /* context info. in case of yields */ lua_KFunction k; /* continuation in case of yields */
lua_CFunction k; /* continuation in case of yields */
ptrdiff_t old_errfunc; ptrdiff_t old_errfunc;
lu_byte old_allowhook; lua_KContext ctx; /* context info. in case of yields */
lu_byte status;
} c; } c;
} u; } u;
ptrdiff_t extra;
short nresults; /* expected number of results from this function */
lu_byte callstatus;
} CallInfo; } CallInfo;
/* /*
** Bits in CallInfo status ** Bits in CallInfo status
*/ */
#define CIST_LUA (1<<0) /* call is running a Lua function */ #define CIST_OAH (1<<0) /* original value of 'allowhook' */
#define CIST_HOOKED (1<<1) /* call is running a debug hook */ #define CIST_LUA (1<<1) /* call is running a Lua function */
#define CIST_REENTRY (1<<2) /* call is running on same invocation of #define CIST_HOOKED (1<<2) /* call is running a debug hook */
luaV_execute of previous call */ #define CIST_FRESH (1<<3) /* call is running on a fresh invocation
#define CIST_YIELDED (1<<3) /* call reentered after suspension */ of luaV_execute */
#define CIST_YPCALL (1<<4) /* call is a yieldable protected call */ #define CIST_YPCALL (1<<4) /* call is a yieldable protected call */
#define CIST_STAT (1<<5) /* call has an error status (pcall) */ #define CIST_TAIL (1<<5) /* call was tail called */
#define CIST_TAIL (1<<6) /* call was tail called */ #define CIST_HOOKYIELD (1<<6) /* last hook called yielded */
#define CIST_HOOKYIELD (1<<7) /* last hook called yielded */ #define CIST_LEQ (1<<7) /* using __lt for __le */
#define isLua(ci) ((ci)->callstatus & CIST_LUA) #define isLua(ci) ((ci)->callstatus & CIST_LUA)
/* assume that CIST_OAH has offset 0 and that 'v' is strictly 0/1 */
#define setoah(st,v) ((st) = ((st) & ~CIST_OAH) | (v))
#define getoah(st) ((st) & CIST_OAH)
/* /*
** `global state', shared by all threads of this state ** 'global state', shared by all threads of this state
*/ */
typedef struct global_State { typedef struct global_State {
lua_Alloc frealloc; /* function to reallocate memory */ lua_Alloc frealloc; /* function to reallocate memory */
void *ud; /* auxiliary data to `frealloc' */ void *ud; /* auxiliary data to 'frealloc' */
lu_mem totalbytes; /* number of bytes currently allocated - GCdebt */ l_mem totalbytes; /* number of bytes currently allocated - GCdebt */
l_mem GCdebt; /* bytes allocated not yet compensated by the collector */ l_mem GCdebt; /* bytes allocated not yet compensated by the collector */
lu_mem GCmemtrav; /* memory traversed by the GC */ lu_mem GCmemtrav; /* memory traversed by the GC */
lu_mem GCestimate; /* an estimate of the non-garbage memory in use */ lu_mem GCestimate; /* an estimate of the non-garbage memory in use */
@ -123,36 +129,36 @@ typedef struct global_State {
lu_byte gcstate; /* state of garbage collector */ lu_byte gcstate; /* state of garbage collector */
lu_byte gckind; /* kind of GC running */ lu_byte gckind; /* kind of GC running */
lu_byte gcrunning; /* true if GC is running */ lu_byte gcrunning; /* true if GC is running */
int sweepstrgc; /* position of sweep in `strt' */
GCObject *allgc; /* list of all collectable objects */ GCObject *allgc; /* list of all collectable objects */
GCObject **sweepgc; /* current position of sweep in list */
GCObject *finobj; /* list of collectable objects with finalizers */ GCObject *finobj; /* list of collectable objects with finalizers */
GCObject **sweepgc; /* current position of sweep in list 'allgc' */
GCObject **sweepfin; /* current position of sweep in list 'finobj' */
GCObject *gray; /* list of gray objects */ GCObject *gray; /* list of gray objects */
GCObject *grayagain; /* list of objects to be traversed atomically */ GCObject *grayagain; /* list of objects to be traversed atomically */
GCObject *weak; /* list of tables with weak values */ GCObject *weak; /* list of tables with weak values */
GCObject *ephemeron; /* list of ephemeron tables (weak keys) */ GCObject *ephemeron; /* list of ephemeron tables (weak keys) */
GCObject *allweak; /* list of all-weak tables */ GCObject *allweak; /* list of all-weak tables */
GCObject *tobefnz; /* list of userdata to be GC */ GCObject *tobefnz; /* list of userdata to be GC */
UpVal uvhead; /* head of double-linked list of all open upvalues */ GCObject *fixedgc; /* list of objects not to be collected */
Mbuffer buff; /* temporary buffer for string concatenation */ struct lua_State *twups; /* list of threads with open upvalues */
unsigned int gcfinnum; /* number of finalizers to call in each GC step */
int gcpause; /* size of pause between successive GCs */ int gcpause; /* size of pause between successive GCs */
int gcmajorinc; /* pause between major collections (only in gen. mode) */ int gcstepmul; /* GC 'granularity' */
int gcstepmul; /* GC `granularity' */
lua_CFunction panic; /* to be called in unprotected errors */ lua_CFunction panic; /* to be called in unprotected errors */
struct lua_State *mainthread; struct lua_State *mainthread;
const lua_Number *version; /* pointer to version number */ const lua_Number *version; /* pointer to version number */
TString *memerrmsg; /* memory-error message */ TString *memerrmsg; /* memory-error message */
TString *tmname[TM_N]; /* array with tag-method names */ TString *tmname[TM_N]; /* array with tag-method names */
struct Table *mt[LUA_NUMTAGS]; /* metatables for basic types */ struct Table *mt[LUA_NUMTAGS]; /* metatables for basic types */
TString *strcache[STRCACHE_N][STRCACHE_M]; /* cache for strings in API */
} global_State; } global_State;
/* /*
** `per thread' state ** 'per thread' state
*/ */
struct lua_State { struct lua_State {
CommonHeader; CommonHeader;
unsigned short nci; /* number of items in 'ci' list */
lu_byte status; lu_byte status;
StkId top; /* first free slot in the stack */ StkId top; /* first free slot in the stack */
global_State *l_G; global_State *l_G;
@ -160,19 +166,20 @@ struct lua_State {
const Instruction *oldpc; /* last pc traced */ const Instruction *oldpc; /* last pc traced */
StkId stack_last; /* last free slot in the stack */ StkId stack_last; /* last free slot in the stack */
StkId stack; /* stack base */ StkId stack; /* stack base */
UpVal *openupval; /* list of open upvalues in this stack */
GCObject *gclist;
struct lua_State *twups; /* list of threads with open upvalues */
struct lua_longjmp *errorJmp; /* current error recover point */
CallInfo base_ci; /* CallInfo for first level (C calling Lua) */
volatile lua_Hook hook;
ptrdiff_t errfunc; /* current error handling function (stack index) */
int stacksize; int stacksize;
int basehookcount;
int hookcount;
unsigned short nny; /* number of non-yieldable calls in stack */ unsigned short nny; /* number of non-yieldable calls in stack */
unsigned short nCcalls; /* number of nested C calls */ unsigned short nCcalls; /* number of nested C calls */
lu_byte hookmask; l_signalT hookmask;
lu_byte allowhook; lu_byte allowhook;
int basehookcount;
int hookcount;
lua_Hook hook;
GCObject *openupval; /* list of open upvalues in this stack */
GCObject *gclist;
struct lua_longjmp *errorJmp; /* current error recover point */
ptrdiff_t errfunc; /* current error handling function (stack index) */
CallInfo base_ci; /* CallInfo for first level (C calling Lua) */
}; };
@ -180,48 +187,47 @@ struct lua_State {
/* /*
** Union of all collectable objects ** Union of all collectable objects (only for conversions)
*/ */
union GCObject { union GCUnion {
GCheader gch; /* common header */ GCObject gc; /* common header */
union TString ts; struct TString ts;
union Udata u; struct Udata u;
union Closure cl; union Closure cl;
struct Table h; struct Table h;
struct Proto p; struct Proto p;
struct UpVal uv;
struct lua_State th; /* thread */ struct lua_State th; /* thread */
}; };
#define gch(o) (&(o)->gch) #define cast_u(o) cast(union GCUnion *, (o))
/* macros to convert a GCObject into a specific value */ /* macros to convert a GCObject into a specific value */
#define rawgco2ts(o) \ #define gco2ts(o) \
check_exp(novariant((o)->gch.tt) == LUA_TSTRING, &((o)->ts)) check_exp(novariant((o)->tt) == LUA_TSTRING, &((cast_u(o))->ts))
#define gco2ts(o) (&rawgco2ts(o)->tsv) #define gco2u(o) check_exp((o)->tt == LUA_TUSERDATA, &((cast_u(o))->u))
#define rawgco2u(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u)) #define gco2lcl(o) check_exp((o)->tt == LUA_TLCL, &((cast_u(o))->cl.l))
#define gco2u(o) (&rawgco2u(o)->uv) #define gco2ccl(o) check_exp((o)->tt == LUA_TCCL, &((cast_u(o))->cl.c))
#define gco2lcl(o) check_exp((o)->gch.tt == LUA_TLCL, &((o)->cl.l))
#define gco2ccl(o) check_exp((o)->gch.tt == LUA_TCCL, &((o)->cl.c))
#define gco2cl(o) \ #define gco2cl(o) \
check_exp(novariant((o)->gch.tt) == LUA_TFUNCTION, &((o)->cl)) check_exp(novariant((o)->tt) == LUA_TFUNCTION, &((cast_u(o))->cl))
#define gco2t(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h)) #define gco2t(o) check_exp((o)->tt == LUA_TTABLE, &((cast_u(o))->h))
#define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p)) #define gco2p(o) check_exp((o)->tt == LUA_TPROTO, &((cast_u(o))->p))
#define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv)) #define gco2th(o) check_exp((o)->tt == LUA_TTHREAD, &((cast_u(o))->th))
#define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
/* macro to convert any Lua object into a GCObject */ /* macro to convert a Lua object into a GCObject */
#define obj2gco(v) (cast(GCObject *, (v))) #define obj2gco(v) \
check_exp(novariant((v)->tt) < LUA_TDEADKEY, (&(cast_u(v)->gc)))
/* actual number of total bytes allocated */ /* actual number of total bytes allocated */
#define gettotalbytes(g) ((g)->totalbytes + (g)->GCdebt) #define gettotalbytes(g) cast(lu_mem, (g)->totalbytes + (g)->GCdebt)
LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt); LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt);
LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1); LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L); LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L);
LUAI_FUNC void luaE_freeCI (lua_State *L); LUAI_FUNC void luaE_freeCI (lua_State *L);
LUAI_FUNC void luaE_shrinkCI (lua_State *L);
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: lstring.h,v 1.49.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lstring.h,v 1.61 2015/11/03 15:36:01 roberto Exp $
** String table (keep all strings handled by Lua) ** String table (keep all strings handled by Lua)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -12,35 +12,38 @@
#include "lstate.h" #include "lstate.h"
#define sizestring(s) (sizeof(union TString)+((s)->len+1)*sizeof(char)) #define sizelstring(l) (sizeof(union UTString) + ((l) + 1) * sizeof(char))
#define sizeudata(u) (sizeof(union Udata)+(u)->len) #define sizeludata(l) (sizeof(union UUdata) + (l))
#define sizeudata(u) sizeludata((u)->len)
#define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \ #define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \
(sizeof(s)/sizeof(char))-1)) (sizeof(s)/sizeof(char))-1))
#define luaS_fix(s) l_setbit((s)->tsv.marked, FIXEDBIT)
/* /*
** test whether a string is a reserved word ** test whether a string is a reserved word
*/ */
#define isreserved(s) ((s)->tsv.tt == LUA_TSHRSTR && (s)->tsv.extra > 0) #define isreserved(s) ((s)->tt == LUA_TSHRSTR && (s)->extra > 0)
/* /*
** equality for short strings, which are always internalized ** equality for short strings, which are always internalized
*/ */
#define eqshrstr(a,b) check_exp((a)->tsv.tt == LUA_TSHRSTR, (a) == (b)) #define eqshrstr(a,b) check_exp((a)->tt == LUA_TSHRSTR, (a) == (b))
LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed); LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts);
LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b); LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
LUAI_FUNC int luaS_eqstr (TString *a, TString *b);
LUAI_FUNC void luaS_resize (lua_State *L, int newsize); LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, Table *e); LUAI_FUNC void luaS_clearcache (global_State *g);
LUAI_FUNC void luaS_init (lua_State *L);
LUAI_FUNC void luaS_remove (lua_State *L, TString *ts);
LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s);
LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l); LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
LUAI_FUNC TString *luaS_new (lua_State *L, const char *str); LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
LUAI_FUNC TString *luaS_createlngstrobj (lua_State *L, size_t l);
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: ltable.h,v 2.16.1.2 2013/08/30 15:49:41 roberto Exp $ ** $Id: ltable.h,v 2.21 2015/11/03 15:47:30 roberto Exp $
** Lua tables (hash) ** Lua tables (hash)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -11,26 +11,39 @@
#define gnode(t,i) (&(t)->node[i]) #define gnode(t,i) (&(t)->node[i])
#define gkey(n) (&(n)->i_key.tvk)
#define gval(n) (&(n)->i_val) #define gval(n) (&(n)->i_val)
#define gnext(n) ((n)->i_key.nk.next) #define gnext(n) ((n)->i_key.nk.next)
/* 'const' to avoid wrong writings that can mess up field 'next' */
#define gkey(n) cast(const TValue*, (&(n)->i_key.tvk))
/*
** writable version of 'gkey'; allows updates to individual fields,
** but not to the whole (which has incompatible type)
*/
#define wgkey(n) (&(n)->i_key.nk)
#define invalidateTMcache(t) ((t)->flags = 0) #define invalidateTMcache(t) ((t)->flags = 0)
/* returns the key, given the value of a table entry */ /* returns the key, given the value of a table entry */
#define keyfromval(v) \ #define keyfromval(v) \
(gkey(cast(Node *, cast(char *, (v)) - offsetof(Node, i_val)))) (gkey(cast(Node *, cast(char *, (v)) - offsetof(Node, i_val))))
LUAI_FUNC const TValue *luaH_getint (Table *t, int key); LUAI_FUNC const TValue *luaH_getint (Table *t, lua_Integer key);
LUAI_FUNC void luaH_setint (lua_State *L, Table *t, int key, TValue *value); LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key,
TValue *value);
LUAI_FUNC const TValue *luaH_getshortstr (Table *t, TString *key);
LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key); LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key); LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
LUAI_FUNC TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key); LUAI_FUNC TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key);
LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key); LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key);
LUAI_FUNC Table *luaH_new (lua_State *L); LUAI_FUNC Table *luaH_new (lua_State *L);
LUAI_FUNC void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize); LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, int nasize); unsigned int nhsize);
LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize);
LUAI_FUNC void luaH_free (lua_State *L, Table *t); LUAI_FUNC void luaH_free (lua_State *L, Table *t);
LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key); LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
LUAI_FUNC int luaH_getn (Table *t); LUAI_FUNC int luaH_getn (Table *t);

@ -1,5 +1,5 @@
/* /*
** $Id: ltm.h,v 2.11.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: ltm.h,v 2.22 2016/02/26 19:20:15 roberto Exp $
** Tag methods ** Tag methods
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,7 +13,7 @@
/* /*
* WARNING: if you change the order of this enumeration, * WARNING: if you change the order of this enumeration,
* grep "ORDER TM" * grep "ORDER TM" and "ORDER OP"
*/ */
typedef enum { typedef enum {
TM_INDEX, TM_INDEX,
@ -21,14 +21,21 @@ typedef enum {
TM_GC, TM_GC,
TM_MODE, TM_MODE,
TM_LEN, TM_LEN,
TM_EQ, /* last tag method with `fast' access */ TM_EQ, /* last tag method with fast access */
TM_ADD, TM_ADD,
TM_SUB, TM_SUB,
TM_MUL, TM_MUL,
TM_DIV,
TM_MOD, TM_MOD,
TM_POW, TM_POW,
TM_DIV,
TM_IDIV,
TM_BAND,
TM_BOR,
TM_BXOR,
TM_SHL,
TM_SHR,
TM_UNM, TM_UNM,
TM_BNOT,
TM_LT, TM_LT,
TM_LE, TM_LE,
TM_CONCAT, TM_CONCAT,
@ -44,14 +51,26 @@ typedef enum {
#define fasttm(l,et,e) gfasttm(G(l), et, e) #define fasttm(l,et,e) gfasttm(G(l), et, e)
#define ttypename(x) luaT_typenames_[(x) + 1] #define ttypename(x) luaT_typenames_[(x) + 1]
#define objtypename(x) ttypename(ttypenv(x))
LUAI_DDEC const char *const luaT_typenames_[LUA_TOTALTAGS]; LUAI_DDEC const char *const luaT_typenames_[LUA_TOTALTAGS];
LUAI_FUNC const char *luaT_objtypename (lua_State *L, const TValue *o);
LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename); LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename);
LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o,
TMS event); TMS event);
LUAI_FUNC void luaT_init (lua_State *L); LUAI_FUNC void luaT_init (lua_State *L);
LUAI_FUNC void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
const TValue *p2, TValue *p3, int hasres);
LUAI_FUNC int luaT_callbinTM (lua_State *L, const TValue *p1, const TValue *p2,
StkId res, TMS event);
LUAI_FUNC void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
StkId res, TMS event);
LUAI_FUNC int luaT_callorderTM (lua_State *L, const TValue *p1,
const TValue *p2, TMS event);
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: lua.h,v 1.285.1.2 2013/11/11 12:09:16 roberto Exp $ ** $Id: lua.h,v 1.331 2016/05/30 15:53:28 roberto Exp $
** Lua - A Scripting Language ** Lua - A Scripting Language
** Lua.org, PUC-Rio, Brazil (http://www.lua.org) ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
** See Copyright Notice at the end of this file ** See Copyright Notice at the end of this file
@ -17,27 +17,29 @@
#define LUA_VERSION_MAJOR "5" #define LUA_VERSION_MAJOR "5"
#define LUA_VERSION_MINOR "2" #define LUA_VERSION_MINOR "3"
#define LUA_VERSION_NUM 502 #define LUA_VERSION_NUM 503
#define LUA_VERSION_RELEASE "3" #define LUA_VERSION_RELEASE "3"
#define LUA_VERSION "Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR #define LUA_VERSION "Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
#define LUA_RELEASE LUA_VERSION "." LUA_VERSION_RELEASE #define LUA_RELEASE LUA_VERSION "." LUA_VERSION_RELEASE
#define LUA_COPYRIGHT LUA_RELEASE " Copyright (C) 1994-2013 Lua.org, PUC-Rio" #define LUA_COPYRIGHT LUA_RELEASE " Copyright (C) 1994-2016 Lua.org, PUC-Rio"
#define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo, W. Celes" #define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
/* mark for precompiled code ('<esc>Lua') */ /* mark for precompiled code ('<esc>Lua') */
#define LUA_SIGNATURE "\033Lua" #define LUA_SIGNATURE "\x1bLua"
/* option for multiple returns in 'lua_pcall' and 'lua_call' */ /* option for multiple returns in 'lua_pcall' and 'lua_call' */
#define LUA_MULTRET (-1) #define LUA_MULTRET (-1)
/* /*
** pseudo-indices ** Pseudo-indices
** (-LUAI_MAXSTACK is the minimum valid index; we keep some free empty
** space after that to help overflow detection)
*/ */
#define LUA_REGISTRYINDEX LUAI_FIRSTPSEUDOIDX #define LUA_REGISTRYINDEX (-LUAI_MAXSTACK - 1000)
#define lua_upvalueindex(i) (LUA_REGISTRYINDEX - (i)) #define lua_upvalueindex(i) (LUA_REGISTRYINDEX - (i))
@ -53,22 +55,6 @@
typedef struct lua_State lua_State; typedef struct lua_State lua_State;
typedef int (*lua_CFunction) (lua_State *L);
/*
** functions that read/write blocks when loading/dumping Lua chunks
*/
typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
typedef int (*lua_Writer) (lua_State *L, const void* p, size_t sz, void* ud);
/*
** prototype for memory-allocation functions
*/
typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
/* /*
** basic types ** basic types
@ -109,6 +95,34 @@ typedef LUA_INTEGER lua_Integer;
/* unsigned integer type */ /* unsigned integer type */
typedef LUA_UNSIGNED lua_Unsigned; typedef LUA_UNSIGNED lua_Unsigned;
/* type for continuation-function contexts */
typedef LUA_KCONTEXT lua_KContext;
/*
** Type for C functions registered with Lua
*/
typedef int (*lua_CFunction) (lua_State *L);
/*
** Type for continuation functions
*/
typedef int (*lua_KFunction) (lua_State *L, int status, lua_KContext ctx);
/*
** Type for functions that read/write blocks when loading/dumping Lua chunks
*/
typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
typedef int (*lua_Writer) (lua_State *L, const void *p, size_t sz, void *ud);
/*
** Type for memory-allocation functions
*/
typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
/* /*
@ -145,11 +159,9 @@ LUA_API int (lua_absindex) (lua_State *L, int idx);
LUA_API int (lua_gettop) (lua_State *L); LUA_API int (lua_gettop) (lua_State *L);
LUA_API void (lua_settop) (lua_State *L, int idx); LUA_API void (lua_settop) (lua_State *L, int idx);
LUA_API void (lua_pushvalue) (lua_State *L, int idx); LUA_API void (lua_pushvalue) (lua_State *L, int idx);
LUA_API void (lua_remove) (lua_State *L, int idx); LUA_API void (lua_rotate) (lua_State *L, int idx, int n);
LUA_API void (lua_insert) (lua_State *L, int idx);
LUA_API void (lua_replace) (lua_State *L, int idx);
LUA_API void (lua_copy) (lua_State *L, int fromidx, int toidx); LUA_API void (lua_copy) (lua_State *L, int fromidx, int toidx);
LUA_API int (lua_checkstack) (lua_State *L, int sz); LUA_API int (lua_checkstack) (lua_State *L, int n);
LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n); LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n);
@ -161,13 +173,13 @@ LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n);
LUA_API int (lua_isnumber) (lua_State *L, int idx); LUA_API int (lua_isnumber) (lua_State *L, int idx);
LUA_API int (lua_isstring) (lua_State *L, int idx); LUA_API int (lua_isstring) (lua_State *L, int idx);
LUA_API int (lua_iscfunction) (lua_State *L, int idx); LUA_API int (lua_iscfunction) (lua_State *L, int idx);
LUA_API int (lua_isinteger) (lua_State *L, int idx);
LUA_API int (lua_isuserdata) (lua_State *L, int idx); LUA_API int (lua_isuserdata) (lua_State *L, int idx);
LUA_API int (lua_type) (lua_State *L, int idx); LUA_API int (lua_type) (lua_State *L, int idx);
LUA_API const char *(lua_typename) (lua_State *L, int tp); LUA_API const char *(lua_typename) (lua_State *L, int tp);
LUA_API lua_Number (lua_tonumberx) (lua_State *L, int idx, int *isnum); LUA_API lua_Number (lua_tonumberx) (lua_State *L, int idx, int *isnum);
LUA_API lua_Integer (lua_tointegerx) (lua_State *L, int idx, int *isnum); LUA_API lua_Integer (lua_tointegerx) (lua_State *L, int idx, int *isnum);
LUA_API lua_Unsigned (lua_tounsignedx) (lua_State *L, int idx, int *isnum);
LUA_API int (lua_toboolean) (lua_State *L, int idx); LUA_API int (lua_toboolean) (lua_State *L, int idx);
LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len); LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len);
LUA_API size_t (lua_rawlen) (lua_State *L, int idx); LUA_API size_t (lua_rawlen) (lua_State *L, int idx);
@ -181,13 +193,20 @@ LUA_API const void *(lua_topointer) (lua_State *L, int idx);
** Comparison and arithmetic functions ** Comparison and arithmetic functions
*/ */
#define LUA_OPADD 0 /* ORDER TM */ #define LUA_OPADD 0 /* ORDER TM, ORDER OP */
#define LUA_OPSUB 1 #define LUA_OPSUB 1
#define LUA_OPMUL 2 #define LUA_OPMUL 2
#define LUA_OPDIV 3 #define LUA_OPMOD 3
#define LUA_OPMOD 4 #define LUA_OPPOW 4
#define LUA_OPPOW 5 #define LUA_OPDIV 5
#define LUA_OPUNM 6 #define LUA_OPIDIV 6
#define LUA_OPBAND 7
#define LUA_OPBOR 8
#define LUA_OPBXOR 9
#define LUA_OPSHL 10
#define LUA_OPSHR 11
#define LUA_OPUNM 12
#define LUA_OPBNOT 13
LUA_API void (lua_arith) (lua_State *L, int op); LUA_API void (lua_arith) (lua_State *L, int op);
@ -205,8 +224,7 @@ LUA_API int (lua_compare) (lua_State *L, int idx1, int idx2, int op);
LUA_API void (lua_pushnil) (lua_State *L); LUA_API void (lua_pushnil) (lua_State *L);
LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n); LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n);
LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n); LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n);
LUA_API void (lua_pushunsigned) (lua_State *L, lua_Unsigned n); LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t len);
LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t l);
LUA_API const char *(lua_pushstring) (lua_State *L, const char *s); LUA_API const char *(lua_pushstring) (lua_State *L, const char *s);
LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt, LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
va_list argp); va_list argp);
@ -220,26 +238,29 @@ LUA_API int (lua_pushthread) (lua_State *L);
/* /*
** get functions (Lua -> stack) ** get functions (Lua -> stack)
*/ */
LUA_API void (lua_getglobal) (lua_State *L, const char *var); LUA_API int (lua_getglobal) (lua_State *L, const char *name);
LUA_API void (lua_gettable) (lua_State *L, int idx); LUA_API int (lua_gettable) (lua_State *L, int idx);
LUA_API void (lua_getfield) (lua_State *L, int idx, const char *k); LUA_API int (lua_getfield) (lua_State *L, int idx, const char *k);
LUA_API void (lua_rawget) (lua_State *L, int idx); LUA_API int (lua_geti) (lua_State *L, int idx, lua_Integer n);
LUA_API void (lua_rawgeti) (lua_State *L, int idx, int n); LUA_API int (lua_rawget) (lua_State *L, int idx);
LUA_API void (lua_rawgetp) (lua_State *L, int idx, const void *p); LUA_API int (lua_rawgeti) (lua_State *L, int idx, lua_Integer n);
LUA_API int (lua_rawgetp) (lua_State *L, int idx, const void *p);
LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec); LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec);
LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz); LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz);
LUA_API int (lua_getmetatable) (lua_State *L, int objindex); LUA_API int (lua_getmetatable) (lua_State *L, int objindex);
LUA_API void (lua_getuservalue) (lua_State *L, int idx); LUA_API int (lua_getuservalue) (lua_State *L, int idx);
/* /*
** set functions (stack -> Lua) ** set functions (stack -> Lua)
*/ */
LUA_API void (lua_setglobal) (lua_State *L, const char *var); LUA_API void (lua_setglobal) (lua_State *L, const char *name);
LUA_API void (lua_settable) (lua_State *L, int idx); LUA_API void (lua_settable) (lua_State *L, int idx);
LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k); LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k);
LUA_API void (lua_seti) (lua_State *L, int idx, lua_Integer n);
LUA_API void (lua_rawset) (lua_State *L, int idx); LUA_API void (lua_rawset) (lua_State *L, int idx);
LUA_API void (lua_rawseti) (lua_State *L, int idx, int n); LUA_API void (lua_rawseti) (lua_State *L, int idx, lua_Integer n);
LUA_API void (lua_rawsetp) (lua_State *L, int idx, const void *p); LUA_API void (lua_rawsetp) (lua_State *L, int idx, const void *p);
LUA_API int (lua_setmetatable) (lua_State *L, int objindex); LUA_API int (lua_setmetatable) (lua_State *L, int objindex);
LUA_API void (lua_setuservalue) (lua_State *L, int idx); LUA_API void (lua_setuservalue) (lua_State *L, int idx);
@ -248,31 +269,31 @@ LUA_API void (lua_setuservalue) (lua_State *L, int idx);
/* /*
** 'load' and 'call' functions (load and run Lua code) ** 'load' and 'call' functions (load and run Lua code)
*/ */
LUA_API void (lua_callk) (lua_State *L, int nargs, int nresults, int ctx, LUA_API void (lua_callk) (lua_State *L, int nargs, int nresults,
lua_CFunction k); lua_KContext ctx, lua_KFunction k);
#define lua_call(L,n,r) lua_callk(L, (n), (r), 0, NULL) #define lua_call(L,n,r) lua_callk(L, (n), (r), 0, NULL)
LUA_API int (lua_getctx) (lua_State *L, int *ctx);
LUA_API int (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc, LUA_API int (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc,
int ctx, lua_CFunction k); lua_KContext ctx, lua_KFunction k);
#define lua_pcall(L,n,r,f) lua_pcallk(L, (n), (r), (f), 0, NULL) #define lua_pcall(L,n,r,f) lua_pcallk(L, (n), (r), (f), 0, NULL)
LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt, LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt,
const char *chunkname, const char *chunkname, const char *mode);
const char *mode);
LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data); LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data, int strip);
/* /*
** coroutine functions ** coroutine functions
*/ */
LUA_API int (lua_yieldk) (lua_State *L, int nresults, int ctx, LUA_API int (lua_yieldk) (lua_State *L, int nresults, lua_KContext ctx,
lua_CFunction k); lua_KFunction k);
LUA_API int (lua_resume) (lua_State *L, lua_State *from, int narg);
LUA_API int (lua_status) (lua_State *L);
LUA_API int (lua_isyieldable) (lua_State *L);
#define lua_yield(L,n) lua_yieldk(L, (n), 0, NULL) #define lua_yield(L,n) lua_yieldk(L, (n), 0, NULL)
LUA_API int (lua_resume) (lua_State *L, lua_State *from, int narg);
LUA_API int (lua_status) (lua_State *L);
/* /*
** garbage-collection function and options ** garbage-collection function and options
@ -286,10 +307,7 @@ LUA_API int (lua_status) (lua_State *L);
#define LUA_GCSTEP 5 #define LUA_GCSTEP 5
#define LUA_GCSETPAUSE 6 #define LUA_GCSETPAUSE 6
#define LUA_GCSETSTEPMUL 7 #define LUA_GCSETSTEPMUL 7
#define LUA_GCSETMAJORINC 8
#define LUA_GCISRUNNING 9 #define LUA_GCISRUNNING 9
#define LUA_GCGEN 10
#define LUA_GCINC 11
LUA_API int (lua_gc) (lua_State *L, int what, int data); LUA_API int (lua_gc) (lua_State *L, int what, int data);
@ -305,20 +323,23 @@ LUA_API int (lua_next) (lua_State *L, int idx);
LUA_API void (lua_concat) (lua_State *L, int n); LUA_API void (lua_concat) (lua_State *L, int n);
LUA_API void (lua_len) (lua_State *L, int idx); LUA_API void (lua_len) (lua_State *L, int idx);
LUA_API size_t (lua_stringtonumber) (lua_State *L, const char *s);
LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud); LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
LUA_API void (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud); LUA_API void (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
/* /*
** =============================================================== ** {==============================================================
** some useful macros ** some useful macros
** =============================================================== ** ===============================================================
*/ */
#define lua_tonumber(L,i) lua_tonumberx(L,i,NULL) #define lua_getextraspace(L) ((void *)((char *)(L) - LUA_EXTRASPACE))
#define lua_tointeger(L,i) lua_tointegerx(L,i,NULL)
#define lua_tounsigned(L,i) lua_tounsignedx(L,i,NULL) #define lua_tonumber(L,i) lua_tonumberx(L,(i),NULL)
#define lua_tointeger(L,i) lua_tointegerx(L,(i),NULL)
#define lua_pop(L,n) lua_settop(L, -(n)-1) #define lua_pop(L,n) lua_settop(L, -(n)-1)
@ -337,15 +358,36 @@ LUA_API void (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
#define lua_isnone(L,n) (lua_type(L, (n)) == LUA_TNONE) #define lua_isnone(L,n) (lua_type(L, (n)) == LUA_TNONE)
#define lua_isnoneornil(L, n) (lua_type(L, (n)) <= 0) #define lua_isnoneornil(L, n) (lua_type(L, (n)) <= 0)
#define lua_pushliteral(L, s) \ #define lua_pushliteral(L, s) lua_pushstring(L, "" s)
lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)
#define lua_pushglobaltable(L) \ #define lua_pushglobaltable(L) \
lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS) ((void)lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS))
#define lua_tostring(L,i) lua_tolstring(L, (i), NULL) #define lua_tostring(L,i) lua_tolstring(L, (i), NULL)
#define lua_insert(L,idx) lua_rotate(L, (idx), 1)
#define lua_remove(L,idx) (lua_rotate(L, (idx), -1), lua_pop(L, 1))
#define lua_replace(L,idx) (lua_copy(L, -1, (idx)), lua_pop(L, 1))
/* }============================================================== */
/*
** {==============================================================
** compatibility macros for unsigned conversions
** ===============================================================
*/
#if defined(LUA_COMPAT_APIINTCASTS)
#define lua_pushunsigned(L,n) lua_pushinteger(L, (lua_Integer)(n))
#define lua_tounsignedx(L,i,is) ((lua_Unsigned)lua_tointegerx(L,i,is))
#define lua_tounsigned(L,i) lua_tounsignedx(L,(i),NULL)
#endif
/* }============================================================== */
/* /*
** {====================================================================== ** {======================================================================
@ -390,7 +432,7 @@ LUA_API void *(lua_upvalueid) (lua_State *L, int fidx, int n);
LUA_API void (lua_upvaluejoin) (lua_State *L, int fidx1, int n1, LUA_API void (lua_upvaluejoin) (lua_State *L, int fidx1, int n1,
int fidx2, int n2); int fidx2, int n2);
LUA_API int (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count); LUA_API void (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count);
LUA_API lua_Hook (lua_gethook) (lua_State *L); LUA_API lua_Hook (lua_gethook) (lua_State *L);
LUA_API int (lua_gethookmask) (lua_State *L); LUA_API int (lua_gethookmask) (lua_State *L);
LUA_API int (lua_gethookcount) (lua_State *L); LUA_API int (lua_gethookcount) (lua_State *L);
@ -418,7 +460,7 @@ struct lua_Debug {
/****************************************************************************** /******************************************************************************
* Copyright (C) 1994-2013 Lua.org, PUC-Rio. * Copyright (C) 1994-2016 Lua.org, PUC-Rio.
* *
* Permission is hereby granted, free of charge, to any person obtaining * Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the * a copy of this software and associated documentation files (the

@ -1,113 +1,204 @@
/* /*
** $Id: luaconf.h,v 1.176.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: luaconf.h,v 1.255 2016/05/01 20:06:09 roberto Exp $
** Configuration file for Lua ** Configuration file for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#ifndef lconfig_h #ifndef luaconf_h
#define lconfig_h #define luaconf_h
#include <limits.h> #include <limits.h>
#include <stddef.h> #include <stddef.h>
/* /*
** ================================================================== ** ===================================================================
** Search for "@@" to find all configurable definitions. ** Search for "@@" to find all configurable definitions.
** =================================================================== ** ===================================================================
*/ */
/* /*
@@ LUA_ANSI controls the use of non-ansi features. ** {====================================================================
** CHANGE it (define it) if you want Lua to avoid the use of any ** System Configuration: macros to adapt (if needed) Lua to some
** non-ansi feature or library. ** particular platform, for instance compiling it with 32-bit numbers or
** restricting it to C89.
** =====================================================================
*/ */
#if !defined(LUA_ANSI) && defined(__STRICT_ANSI__)
#define LUA_ANSI /*
#endif @@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats. You
** can also define LUA_32BITS in the make file, but changing here you
** ensure that all software connected to Lua will be compiled with the
** same configuration.
*/
/* #define LUA_32BITS */
#if !defined(LUA_ANSI) && defined(_WIN32) && !defined(_WIN32_WCE) /*
#define LUA_WIN /* enable goodies for regular Windows platforms */ @@ LUA_USE_C89 controls the use of non-ISO-C89 features.
#endif ** Define it if you want Lua to avoid the use of a few C99 features
** or Windows-specific features on Windows.
*/
/* #define LUA_USE_C89 */
#if defined(LUA_WIN)
#define LUA_DL_DLL /*
#define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */ ** By default, Lua on Windows use (some) specific Windows features
*/
#if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE)
#define LUA_USE_WINDOWS /* enable goodies for regular Windows */
#endif #endif
#if defined(LUA_USE_WINDOWS)
#define LUA_DL_DLL /* enable support for DLL */
#define LUA_USE_C89 /* broadly, Windows is C89 */
#endif
#if defined(LUA_USE_LINUX) #if defined(LUA_USE_LINUX)
#define LUA_USE_POSIX #define LUA_USE_POSIX
#define LUA_USE_DLOPEN /* needs an extra library: -ldl */ #define LUA_USE_DLOPEN /* needs an extra library: -ldl */
#define LUA_USE_READLINE /* needs some extra libraries */ #define LUA_USE_READLINE /* needs some extra libraries */
#define LUA_USE_STRTODHEX /* assume 'strtod' handles hex formats */
#define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
#define LUA_USE_LONGLONG /* assume support for long long */
#endif #endif
#if defined(LUA_USE_MACOSX) #if defined(LUA_USE_MACOSX)
#define LUA_USE_POSIX #define LUA_USE_POSIX
#define LUA_USE_DLOPEN /* does not need -ldl */ #define LUA_USE_DLOPEN /* MacOS does not need -ldl */
#define LUA_USE_READLINE /* needs an extra library: -lreadline */ #define LUA_USE_READLINE /* needs an extra library: -lreadline */
#define LUA_USE_STRTODHEX /* assume 'strtod' handles hex formats */ #endif
#define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
#define LUA_USE_LONGLONG /* assume support for long long */
/*
@@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for
** C89 ('long' and 'double'); Windows always has '__int64', so it does
** not need to use this case.
*/
#if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS)
#define LUA_C89_NUMBERS
#endif #endif
/* /*
@@ LUA_USE_POSIX includes all functionality listed as X/Open System @@ LUAI_BITSINT defines the (minimum) number of bits in an 'int'.
@* Interfaces Extension (XSI).
** CHANGE it (define it) if your system is XSI compatible.
*/ */
#if defined(LUA_USE_POSIX) /* avoid undefined shifts */
#define LUA_USE_MKSTEMP #if ((INT_MAX >> 15) >> 15) >= 1
#define LUA_USE_ISATTY #define LUAI_BITSINT 32
#define LUA_USE_POPEN #else
#define LUA_USE_ULONGJMP /* 'int' always must have at least 16 bits */
#define LUA_USE_GMTIME_R #define LUAI_BITSINT 16
#endif #endif
/*
@@ LUA_INT_TYPE defines the type for Lua integers.
@@ LUA_FLOAT_TYPE defines the type for Lua floats.
** Lua should work fine with any mix of these options (if supported
** by your C compiler). The usual configurations are 64-bit integers
** and 'double' (the default), 32-bit integers and 'float' (for
** restricted platforms), and 'long'/'double' (for C compilers not
** compliant with C99, which may not have support for 'long long').
*/
/* predefined options for LUA_INT_TYPE */
#define LUA_INT_INT 1
#define LUA_INT_LONG 2
#define LUA_INT_LONGLONG 3
/* predefined options for LUA_FLOAT_TYPE */
#define LUA_FLOAT_FLOAT 1
#define LUA_FLOAT_DOUBLE 2
#define LUA_FLOAT_LONGDOUBLE 3
#if defined(LUA_32BITS) /* { */
/*
** 32-bit integers and 'float'
*/
#if LUAI_BITSINT >= 32 /* use 'int' if big enough */
#define LUA_INT_TYPE LUA_INT_INT
#else /* otherwise use 'long' */
#define LUA_INT_TYPE LUA_INT_LONG
#endif
#define LUA_FLOAT_TYPE LUA_FLOAT_FLOAT
#elif defined(LUA_C89_NUMBERS) /* }{ */
/*
** largest types available for C89 ('long' and 'double')
*/
#define LUA_INT_TYPE LUA_INT_LONG
#define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE
#endif /* } */
/*
** default configuration for 64-bit Lua ('long long' and 'double')
*/
#if !defined(LUA_INT_TYPE)
#define LUA_INT_TYPE LUA_INT_LONGLONG
#endif
#if !defined(LUA_FLOAT_TYPE)
#define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE
#endif
/* }================================================================== */
/*
** {==================================================================
** Configuration for Paths.
** ===================================================================
*/
/* /*
@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
@* Lua libraries. ** Lua libraries.
@@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
@* C libraries. ** C libraries.
** CHANGE them if your machine has a non-conventional directory ** CHANGE them if your machine has a non-conventional directory
** hierarchy or if you want to install your libraries in ** hierarchy or if you want to install your libraries in
** non-conventional directories. ** non-conventional directories.
*/ */
#define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
#if defined(_WIN32) /* { */ #if defined(_WIN32) /* { */
/* /*
** In Windows, any exclamation mark ('!') in the path is replaced by the ** In Windows, any exclamation mark ('!') in the path is replaced by the
** path of the directory of the executable file of the current process. ** path of the directory of the executable file of the current process.
*/ */
#define LUA_LDIR "!\\hack\\lua\\" #define LUA_LDIR "!\\lua\\"
#define LUA_CDIR "!\\" #define LUA_CDIR "!\\"
#define LUA_SHRDIR "!\\..\\share\\lua\\" LUA_VDIR "\\"
#define LUA_PATH_DEFAULT \ #define LUA_PATH_DEFAULT \
LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" ".\\?.lua" LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \
LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" \
LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \
".\\?.lua;" ".\\?\\init.lua"
#define LUA_CPATH_DEFAULT \ #define LUA_CPATH_DEFAULT \
LUA_CDIR"?.dll;" ".\\?.dll" LUA_CDIR"?.dll;" \
LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \
LUA_CDIR"loadall.dll;" ".\\?.dll"
#else /* }{ */ #else /* }{ */
#define LUA_LDIR "./hack/lua/" #define LUA_ROOT "/usr/local/"
#define LUA_CDIR "./hack/" #define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR "/"
#define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR "/"
#define LUA_PATH_DEFAULT \ #define LUA_PATH_DEFAULT \
LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" "./?.lua" LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \
LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" \
"./?.lua;" "./?/init.lua"
#define LUA_CPATH_DEFAULT \ #define LUA_CPATH_DEFAULT \
LUA_CDIR"?.so;" "./?.so" LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
#endif /* } */ #endif /* } */
#define LUA_PATH "DFHACK_LUA_PATH"
#define LUA_CPATH "DFHACK_LUA_CPATH"
/* /*
@@ LUA_DIRSEP is the directory separator (for submodules). @@ LUA_DIRSEP is the directory separator (for submodules).
@ -120,14 +211,14 @@
#define LUA_DIRSEP "/" #define LUA_DIRSEP "/"
#endif #endif
/* }================================================================== */
/* /*
@@ LUA_ENV is the name of the variable that holds the current ** {==================================================================
@@ environment, used to access global names. ** Marks for exported symbols in the C code
** CHANGE it if you do not like this name. ** ===================================================================
*/ */
#define LUA_ENV "_ENV"
/* /*
@@ LUA_API is a mark for all core API functions. @@ LUA_API is a mark for all core API functions.
@ -140,15 +231,11 @@
*/ */
#if defined(LUA_BUILD_AS_DLL) /* { */ #if defined(LUA_BUILD_AS_DLL) /* { */
#if defined(_MSC_VER)
#if defined(LUA_CORE) || defined(LUA_LIB) /* { */ #if defined(LUA_CORE) || defined(LUA_LIB) /* { */
#define LUA_API __declspec(dllexport) #define LUA_API __declspec(dllexport)
#else /* }{ */ #else /* }{ */
#define LUA_API __declspec(dllimport) #define LUA_API __declspec(dllimport)
#endif /* } */ #endif /* } */
#else
#define LUA_API __attribute__ ((visibility("default")))
#endif
#else /* }{ */ #else /* }{ */
@ -164,10 +251,10 @@
/* /*
@@ LUAI_FUNC is a mark for all extern functions that are not to be @@ LUAI_FUNC is a mark for all extern functions that are not to be
@* exported to outside modules. ** exported to outside modules.
@@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables
@* that are not to be exported to outside modules (LUAI_DDEF for ** that are not to be exported to outside modules (LUAI_DDEF for
@* definitions and LUAI_DDEC for declarations). ** definitions and LUAI_DDEC for declarations).
** CHANGE them if you need to mark them in some special way. Elf/gcc ** CHANGE them if you need to mark them in some special way. Elf/gcc
** (versions 3.2 and later) mark them as "hidden" to optimize access ** (versions 3.2 and later) mark them as "hidden" to optimize access
** when Lua is compiled as a shared library. Not all elf targets support ** when Lua is compiled as a shared library. Not all elf targets support
@ -179,74 +266,61 @@
#if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
defined(__ELF__) /* { */ defined(__ELF__) /* { */
#define LUAI_FUNC __attribute__((visibility("hidden"))) extern #define LUAI_FUNC __attribute__((visibility("hidden"))) extern
#define LUAI_DDEC LUAI_FUNC
#define LUAI_DDEF /* empty */
#else /* }{ */ #else /* }{ */
#define LUAI_FUNC extern #define LUAI_FUNC extern
#define LUAI_DDEC extern
#define LUAI_DDEF /* empty */
#endif /* } */ #endif /* } */
#define LUAI_DDEC LUAI_FUNC
#define LUAI_DDEF /* empty */
/* }================================================================== */
/* /*
@@ LUA_QL describes how error messages quote program elements. ** {==================================================================
** CHANGE it if you want a different appearance. ** Compatibility with previous versions
** ===================================================================
*/ */
#define LUA_QL(x) "'" x "'"
#define LUA_QS LUA_QL("%s")
/* /*
@@ LUA_IDSIZE gives the maximum size for the description of the source @@ LUA_COMPAT_5_2 controls other macros for compatibility with Lua 5.2.
@* of a function in debug information. @@ LUA_COMPAT_5_1 controls other macros for compatibility with Lua 5.1.
** CHANGE it if you want a different size. ** You can define it to get all options, or change specific options
** to fit your specific needs.
*/ */
#define LUA_IDSIZE 60 #if defined(LUA_COMPAT_5_2) /* { */
/* /*
@@ luai_writestring/luai_writeline define how 'print' prints its results. @@ LUA_COMPAT_MATHLIB controls the presence of several deprecated
** They are only used in libraries and the stand-alone program. (The #if ** functions in the mathematical library.
** avoids including 'stdio.h' everywhere.)
*/ */
#if defined(LUA_LIB) || defined(lua_c) #define LUA_COMPAT_MATHLIB
#include <stdio.h>
#define luai_writestring(s,l) fwrite((s), sizeof(char), (l), stdout)
#define luai_writeline() (luai_writestring("\n", 1), fflush(stdout))
#endif
/* /*
@@ luai_writestringerror defines how to print error messages. @@ LUA_COMPAT_BITLIB controls the presence of library 'bit32'.
** (A format string with one argument is enough for Lua...)
*/ */
#define luai_writestringerror(s,p) \ #define LUA_COMPAT_BITLIB
(fprintf(stderr, (s), (p)), fflush(stderr))
/*
@@ LUA_COMPAT_IPAIRS controls the effectiveness of the __ipairs metamethod.
*/
#define LUA_COMPAT_IPAIRS
/* /*
@@ LUAI_MAXSHORTLEN is the maximum length for short strings, that is, @@ LUA_COMPAT_APIINTCASTS controls the presence of macros for
** strings that are internalized. (Cannot be smaller than reserved words ** manipulating other integer types (lua_pushunsigned, lua_tounsigned,
** or tags for metamethods, as these strings must be internalized; ** luaL_checkint, luaL_checklong, etc.)
** #("function") = 8, #("__newindex") = 10.)
*/ */
#define LUAI_MAXSHORTLEN 40 #define LUA_COMPAT_APIINTCASTS
#endif /* } */
/* #if defined(LUA_COMPAT_5_1) /* { */
** {==================================================================
** Compatibility with previous versions
** ===================================================================
*/
/* /* Incompatibilities from 5.2 -> 5.3 */
@@ LUA_COMPAT_ALL controls all compatibility options. #define LUA_COMPAT_MATHLIB
** You can define it to get all options, or change specific options #define LUA_COMPAT_APIINTCASTS
** to fit your specific needs.
*/
#if defined(LUA_COMPAT_ALL) /* { */
/* /*
@@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'. @@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'.
@ -307,237 +381,375 @@
#endif /* } */ #endif /* } */
/*
@@ LUA_COMPAT_FLOATSTRING makes Lua format integral floats without a
@@ a float mark ('.0').
** This macro is not on by default even in compatibility mode,
** because this is not really an incompatibility.
*/
/* #define LUA_COMPAT_FLOATSTRING */
/* }================================================================== */ /* }================================================================== */
/* /*
@@ LUAI_BITSINT defines the number of bits in an int. ** {==================================================================
** CHANGE here if Lua cannot automatically detect the number of bits of ** Configuration for Numbers.
** your machine. Probably you do not need to change this. ** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_*
** satisfy your needs.
** ===================================================================
*/ */
/* avoid overflows in comparison */
#if INT_MAX-20 < 32760 /* { */
#define LUAI_BITSINT 16
#elif INT_MAX > 2147483640L /* }{ */
/* int has at least 32 bits */
#define LUAI_BITSINT 32
#else /* }{ */
#error "you must define LUA_BITSINT with number of bits in an integer"
#endif /* } */
/*
@@ LUA_NUMBER is the floating-point type used by Lua.
@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
@@ over a floating number.
@@ l_mathlim(x) corrects limit name 'x' to the proper float type
** by prefixing it with one of FLT/DBL/LDBL.
@@ LUA_NUMBER_FRMLEN is the length modifier for writing floats.
@@ LUA_NUMBER_FMT is the format for writing floats.
@@ lua_number2str converts a float to a string.
@@ l_mathop allows the addition of an 'l' or 'f' to all math operations.
@@ l_floor takes the floor of a float.
@@ lua_str2number converts a decimal numeric string to a number.
*/
/* The following definitions are good for most cases here */
#define l_floor(x) (l_mathop(floor)(x))
#define lua_number2str(s,sz,n) l_sprintf((s), sz, LUA_NUMBER_FMT, (n))
/* /*
@@ LUA_INT32 is an signed integer with exactly 32 bits. @@ lua_numbertointeger converts a float number to an integer, or
@@ LUAI_UMEM is an unsigned integer big enough to count the total ** returns 0 if float is not within the range of a lua_Integer.
@* memory used by Lua. ** (The range comparisons are tricky because of rounding. The tests
@@ LUAI_MEM is a signed integer big enough to count the total memory ** here assume a two-complement representation, where MININTEGER always
@* used by Lua. ** has an exact representation as a float; MAXINTEGER may not have one,
** CHANGE here if for some weird reason the default definitions are not ** and therefore its conversion to float may have an ill-defined value.)
** good enough for your machine. Probably you do not need to change
** this.
*/ */
#if LUAI_BITSINT >= 32 /* { */ #define lua_numbertointeger(n,p) \
#define LUA_INT32 int ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \
#define LUAI_UMEM size_t (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \
#define LUAI_MEM ptrdiff_t (*(p) = (LUA_INTEGER)(n), 1))
#else /* }{ */
/* 16-bit ints */
#define LUA_INT32 long /* now the variable definitions */
#define LUAI_UMEM unsigned long
#define LUAI_MEM long #if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT /* { single float */
#endif /* } */
#define LUA_NUMBER float
#define l_mathlim(n) (FLT_##n)
#define LUAI_UACNUMBER double
#define LUA_NUMBER_FRMLEN ""
#define LUA_NUMBER_FMT "%.7g"
#define l_mathop(op) op##f
#define lua_str2number(s,p) strtof((s), (p))
#elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE /* }{ long double */
#define LUA_NUMBER long double
#define l_mathlim(n) (LDBL_##n)
#define LUAI_UACNUMBER long double
#define LUA_NUMBER_FRMLEN "L"
#define LUA_NUMBER_FMT "%.19Lg"
#define l_mathop(op) op##l
#define lua_str2number(s,p) strtold((s), (p))
#elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE /* }{ double */
#define LUA_NUMBER double
#define l_mathlim(n) (DBL_##n)
#define LUAI_UACNUMBER double
#define LUA_NUMBER_FRMLEN ""
#define LUA_NUMBER_FMT "%.14g"
#define l_mathop(op) op
#define lua_str2number(s,p) strtod((s), (p))
#else /* }{ */
#error "numeric float type not defined"
#endif /* } */
/* /*
@@ LUAI_MAXSTACK limits the size of the Lua stack. @@ LUA_INTEGER is the integer type used by Lua.
** CHANGE it if you need a different limit. This limit is arbitrary; **
** its only purpose is to stop Lua to consume unlimited stack @@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
** space (and to reserve some numbers for pseudo-indices). **
@@ LUAI_UACINT is the result of an 'usual argument conversion'
@@ over a lUA_INTEGER.
@@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers.
@@ LUA_INTEGER_FMT is the format for writing integers.
@@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER.
@@ LUA_MININTEGER is the minimum value for a LUA_INTEGER.
@@ lua_integer2str converts an integer to a string.
*/ */
#if LUAI_BITSINT >= 32
#define LUAI_MAXSTACK 1000000
#else
#define LUAI_MAXSTACK 15000
#endif
/* reserve some space for error handling */
#define LUAI_FIRSTPSEUDOIDX (-LUAI_MAXSTACK - 1000)
/* The following definitions are good for most cases here */
#define LUA_INTEGER_FMT "%" LUA_INTEGER_FRMLEN "d"
#define lua_integer2str(s,sz,n) l_sprintf((s), sz, LUA_INTEGER_FMT, (n))
#define LUAI_UACINT LUA_INTEGER
/* /*
@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system. ** use LUAI_UACINT here to avoid problems with promotions (which
** CHANGE it if it uses too much C-stack space. ** can turn a comparison between unsigneds into a signed comparison)
*/ */
#define LUAL_BUFFERSIZE BUFSIZ #define LUA_UNSIGNED unsigned LUAI_UACINT
/* now the variable definitions */
#if LUA_INT_TYPE == LUA_INT_INT /* { int */
#define LUA_INTEGER int
#define LUA_INTEGER_FRMLEN ""
#define LUA_MAXINTEGER INT_MAX
#define LUA_MININTEGER INT_MIN
#elif LUA_INT_TYPE == LUA_INT_LONG /* }{ long */
#define LUA_INTEGER long
#define LUA_INTEGER_FRMLEN "l"
#define LUA_MAXINTEGER LONG_MAX
#define LUA_MININTEGER LONG_MIN
#elif LUA_INT_TYPE == LUA_INT_LONGLONG /* }{ long long */
/* use presence of macro LLONG_MAX as proxy for C99 compliance */
#if defined(LLONG_MAX) /* { */
/* use ISO C99 stuff */
#define LUA_INTEGER long long
#define LUA_INTEGER_FRMLEN "ll"
#define LUA_MAXINTEGER LLONG_MAX
#define LUA_MININTEGER LLONG_MIN
#elif defined(LUA_USE_WINDOWS) /* }{ */
/* in Windows, can use specific Windows types */
#define LUA_INTEGER __int64
#define LUA_INTEGER_FRMLEN "I64"
#define LUA_MAXINTEGER _I64_MAX
#define LUA_MININTEGER _I64_MIN
#else /* }{ */
#error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \
or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)"
#endif /* } */
#else /* }{ */
#error "numeric integer type not defined"
#endif /* } */
/* }================================================================== */
/* /*
** {================================================================== ** {==================================================================
@@ LUA_NUMBER is the type of numbers in Lua. ** Dependencies with C99 and other C details
** CHANGE the following definitions only if you want to build Lua
** with a number type different from double. You may also need to
** change lua_number2int & lua_number2integer.
** =================================================================== ** ===================================================================
*/ */
#define LUA_NUMBER_DOUBLE
#define LUA_NUMBER double
/* /*
@@ LUAI_UACNUMBER is the result of an 'usual argument conversion' @@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89.
@* over a number. ** (All uses in Lua have only one format item.)
*/ */
#define LUAI_UACNUMBER double #if !defined(LUA_USE_C89)
#define l_sprintf(s,sz,f,i) snprintf(s,sz,f,i)
#else
#define l_sprintf(s,sz,f,i) ((void)(sz), sprintf(s,f,i))
#endif
/* /*
@@ LUA_NUMBER_SCAN is the format for reading numbers. @@ lua_strx2number converts an hexadecimal numeric string to a number.
@@ LUA_NUMBER_FMT is the format for writing numbers. ** In C99, 'strtod' does that conversion. Otherwise, you can
@@ lua_number2str converts a number to a string. ** leave 'lua_strx2number' undefined and Lua will provide its own
@@ LUAI_MAXNUMBER2STR is maximum size of previous conversion. ** implementation.
*/ */
#define LUA_NUMBER_SCAN "%lf" #if !defined(LUA_USE_C89)
#define LUA_NUMBER_FMT "%.14g" #define lua_strx2number(s,p) lua_str2number(s,p)
#define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n)) #endif
#define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */
/* /*
@@ l_mathop allows the addition of an 'l' or 'f' to all math operations @@ lua_number2strx converts a float to an hexadecimal numeric string.
** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that.
** Otherwise, you can leave 'lua_number2strx' undefined and Lua will
** provide its own implementation.
*/ */
#define l_mathop(x) (x) #if !defined(LUA_USE_C89)
#define lua_number2strx(L,b,sz,f,n) ((void)L, l_sprintf(b,sz,f,n))
#endif
/* /*
@@ lua_str2number converts a decimal numeric string to a number. ** 'strtof' and 'opf' variants for math functions are not valid in
@@ lua_strx2number converts an hexadecimal numeric string to a number. ** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the
** In C99, 'strtod' does both conversions. C89, however, has no function ** availability of these variants. ('math.h' is already included in
** to convert floating hexadecimal strings to numbers. For these ** all files that use these macros.)
** systems, you can leave 'lua_strx2number' undefined and Lua will
** provide its own implementation.
*/ */
#define lua_str2number(s,p) strtod((s), (p)) #if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF))
#undef l_mathop /* variants not available */
#if defined(LUA_USE_STRTODHEX) #undef lua_str2number
#define lua_strx2number(s,p) strtod((s), (p)) #define l_mathop(op) (lua_Number)op /* no variant */
#define lua_str2number(s,p) ((lua_Number)strtod((s), (p)))
#endif #endif
/* /*
@@ The luai_num* macros define the primitive operations over numbers. @@ LUA_KCONTEXT is the type of the context ('ctx') for continuation
** functions. It must be a numerical type; Lua will use 'intptr_t' if
** available, otherwise it will use 'ptrdiff_t' (the nearest thing to
** 'intptr_t' in C89)
*/ */
#define LUA_KCONTEXT ptrdiff_t
/* the following operations need the math library */ #if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \
#if defined(lobject_c) || defined(lvm_c) __STDC_VERSION__ >= 199901L
#include <math.h> #include <stdint.h>
#define luai_nummod(L,a,b) ((a) - l_mathop(floor)((a)/(b))*(b)) #if defined(INTPTR_MAX) /* even in C99 this type is optional */
#define luai_numpow(L,a,b) (l_mathop(pow)(a,b)) #undef LUA_KCONTEXT
#define LUA_KCONTEXT intptr_t
#endif #endif
/* these are quite standard operations */
#if defined(LUA_CORE)
#define luai_numadd(L,a,b) ((a)+(b))
#define luai_numsub(L,a,b) ((a)-(b))
#define luai_nummul(L,a,b) ((a)*(b))
#define luai_numdiv(L,a,b) ((a)/(b))
#define luai_numunm(L,a) (-(a))
#define luai_numeq(a,b) ((a)==(b))
#define luai_numlt(L,a,b) ((a)<(b))
#define luai_numle(L,a,b) ((a)<=(b))
#define luai_numisnan(L,a) (!luai_numeq((a), (a)))
#endif #endif
/* /*
@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger. @@ lua_getlocaledecpoint gets the locale "radix character" (decimal point).
** CHANGE that if ptrdiff_t is not adequate on your machine. (On most ** Change that if you do not want to use C locales. (Code using this
** machines, ptrdiff_t gives a good choice between int or long.) ** macro must include header 'locale.h'.)
*/ */
#define LUA_INTEGER ptrdiff_t #if !defined(lua_getlocaledecpoint)
#define lua_getlocaledecpoint() (localeconv()->decimal_point[0])
/* #endif
@@ LUA_UNSIGNED is the integral type used by lua_pushunsigned/lua_tounsigned.
** It must have at least 32 bits.
*/
#define LUA_UNSIGNED unsigned LUA_INT32
/* }================================================================== */
/* /*
** Some tricks with doubles ** {==================================================================
** Language Variations
** =====================================================================
*/ */
#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) /* { */
/* /*
** The next definitions activate some tricks to speed up the @@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some
** conversion from doubles to integer types, mainly to LUA_UNSIGNED. ** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from
** ** numbers to strings. Define LUA_NOCVTS2N to turn off automatic
@@ LUA_MSASMTRICK uses Microsoft assembler to avoid clashes with a ** coercion from strings to numbers.
** DirectX idiosyncrasy.
**
@@ LUA_IEEE754TRICK uses a trick that should work on any machine
** using IEEE754 with a 32-bit integer type.
**
@@ LUA_IEEELL extends the trick to LUA_INTEGER; should only be
** defined when LUA_INTEGER is a 32-bit integer.
**
@@ LUA_IEEEENDIAN is the endianness of doubles in your machine
** (0 for little endian, 1 for big endian); if not defined, Lua will
** check it dynamically for LUA_IEEE754TRICK (but not for LUA_NANTRICK).
**
@@ LUA_NANTRICK controls the use of a trick to pack all types into
** a single double value, using NaN values to represent non-number
** values. The trick only works on 32-bit machines (ints and pointers
** are 32-bit values) with numbers represented as IEEE 754-2008 doubles
** with conventional endianess (12345678 or 87654321), in CPUs that do
** not produce signaling NaN values (all NaNs are quiet).
*/ */
/* #define LUA_NOCVTN2S */
/* #define LUA_NOCVTS2N */
/* Microsoft compiler on a Pentium (32 bit) ? */
#if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86) /* { */
#define LUA_MSASMTRICK
#define LUA_IEEEENDIAN 0
#define LUA_NANTRICK
/*
@@ LUA_USE_APICHECK turns on several consistency checks on the C API.
** Define it as a help when debugging C code.
*/
#if defined(LUA_USE_APICHECK)
#include <assert.h>
#define luai_apicheck(l,e) assert(e)
#endif
/* pentium 32 bits? */ /* }================================================================== */
#elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */
#define LUA_IEEE754TRICK
#define LUA_IEEELL
#define LUA_IEEEENDIAN 0
#define LUA_NANTRICK
/* pentium 64 bits? */ /*
#elif defined(__x86_64) /* }{ */ ** {==================================================================
** Macros that affect the API and must be stable (that is, must be the
** same when you compile Lua and when you compile code that links to
** Lua). You probably do not want/need to change them.
** =====================================================================
*/
#define LUA_IEEE754TRICK /*
#define LUA_IEEEENDIAN 0 @@ LUAI_MAXSTACK limits the size of the Lua stack.
** CHANGE it if you need a different limit. This limit is arbitrary;
** its only purpose is to stop Lua from consuming unlimited stack
** space (and to reserve some numbers for pseudo-indices).
*/
#if LUAI_BITSINT >= 32
#define LUAI_MAXSTACK 1000000
#else
#define LUAI_MAXSTACK 15000
#endif
#elif defined(__POWERPC__) || defined(__ppc__) /* }{ */
#define LUA_IEEE754TRICK /*
#define LUA_IEEEENDIAN 1 @@ LUA_EXTRASPACE defines the size of a raw memory area associated with
** a Lua state with very fast access.
** CHANGE it if you need a different size.
*/
#define LUA_EXTRASPACE (sizeof(void *))
#else /* }{ */
/* assume IEEE754 and a 32-bit integer type */ /*
#define LUA_IEEE754TRICK @@ LUA_IDSIZE gives the maximum size for the description of the source
@@ of a function in debug information.
** CHANGE it if you want a different size.
*/
#define LUA_IDSIZE 60
#endif /* } */
#endif /* } */ /*
@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
** CHANGE it if it uses too much C-stack space. (For long double,
** 'string.format("%.99f", 1e4932)' needs ~5030 bytes, so a
** smaller buffer would force a memory allocation for each call to
** 'string.format'.)
*/
#if defined(LUA_FLOAT_LONGDOUBLE)
#define LUAL_BUFFERSIZE 8192
#else
#define LUAL_BUFFERSIZE ((int)(0x80 * sizeof(void*) * sizeof(lua_Integer)))
#endif
/* }================================================================== */ /* }================================================================== */
/*
@@ LUA_QL describes how error messages quote program elements.
** Lua does not use these macros anymore; they are here for
** compatibility only.
*/
#define LUA_QL(x) "'" x "'"
#define LUA_QS LUA_QL("%s")
/* =================================================================== */ /* =================================================================== */
@ -549,5 +761,7 @@
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: lualib.h,v 1.43.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lualib.h,v 1.44 2014/02/06 17:32:33 roberto Exp $
** Lua standard libraries ** Lua standard libraries
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -29,6 +29,9 @@ LUAMOD_API int (luaopen_os) (lua_State *L);
#define LUA_STRLIBNAME "string" #define LUA_STRLIBNAME "string"
LUAMOD_API int (luaopen_string) (lua_State *L); LUAMOD_API int (luaopen_string) (lua_State *L);
#define LUA_UTF8LIBNAME "utf8"
LUAMOD_API int (luaopen_utf8) (lua_State *L);
#define LUA_BITLIBNAME "bit32" #define LUA_BITLIBNAME "bit32"
LUAMOD_API int (luaopen_bit32) (lua_State *L); LUAMOD_API int (luaopen_bit32) (lua_State *L);

@ -1,5 +1,5 @@
/* /*
** $Id: lundump.h,v 1.39.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lundump.h,v 1.45 2015/09/08 15:41:05 roberto Exp $
** load precompiled Lua chunks ** load precompiled Lua chunks
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -7,22 +7,26 @@
#ifndef lundump_h #ifndef lundump_h
#define lundump_h #define lundump_h
#include "llimits.h"
#include "lobject.h" #include "lobject.h"
#include "lzio.h" #include "lzio.h"
/* load one chunk; from lundump.c */
LUAI_FUNC Closure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name);
/* make header; from lundump.c */ /* data to catch conversion errors */
LUAI_FUNC void luaU_header (lu_byte* h); #define LUAC_DATA "\x19\x93\r\n\x1a\n"
/* dump one chunk; from ldump.c */ #define LUAC_INT 0x5678
LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip); #define LUAC_NUM cast_num(370.5)
/* data to catch conversion errors */ #define MYINT(s) (s[0]-'0')
#define LUAC_TAIL "\x19\x93\r\n\x1a\n" #define LUAC_VERSION (MYINT(LUA_VERSION_MAJOR)*16+MYINT(LUA_VERSION_MINOR))
#define LUAC_FORMAT 0 /* this is the official format */
/* size in bytes of header of binary files */ /* load one chunk; from lundump.c */
#define LUAC_HEADERSIZE (sizeof(LUA_SIGNATURE)-sizeof(char)+2+6+sizeof(LUAC_TAIL)-sizeof(char)) LUAI_FUNC LClosure* luaU_undump (lua_State* L, ZIO* Z, const char* name);
/* dump one chunk; from ldump.c */
LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w,
void* data, int strip);
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: lvm.h,v 2.18.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lvm.h,v 2.40 2016/01/05 16:07:21 roberto Exp $
** Lua virtual machine ** Lua virtual machine
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,32 +13,101 @@
#include "ltm.h" #include "ltm.h"
#define tostring(L,o) (ttisstring(o) || (luaV_tostring(L, o))) #if !defined(LUA_NOCVTN2S)
#define cvt2str(o) ttisnumber(o)
#else
#define cvt2str(o) 0 /* no conversion from numbers to strings */
#endif
#if !defined(LUA_NOCVTS2N)
#define cvt2num(o) ttisstring(o)
#else
#define cvt2num(o) 0 /* no conversion from strings to numbers */
#endif
/*
** You can define LUA_FLOORN2I if you want to convert floats to integers
** by flooring them (instead of raising an error if they are not
** integral values)
*/
#if !defined(LUA_FLOORN2I)
#define LUA_FLOORN2I 0
#endif
#define tonumber(o,n) \
(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
#define tointeger(o,i) \
(ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I))
#define tonumber(o,n) (ttisnumber(o) || (((o) = luaV_tonumber(o,n)) != NULL)) #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
#define equalobj(L,o1,o2) (ttisequal(o1, o2) && luaV_equalobj_(L, o1, o2)) #define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2)
/*
** fast track for 'gettable': if 't' is a table and 't[k]' is not nil,
** return 1 with 'slot' pointing to 't[k]' (final result). Otherwise,
** return 0 (meaning it will have to check metamethod) with 'slot'
** pointing to a nil 't[k]' (if 't' is a table) or NULL (otherwise).
** 'f' is the raw get function to use.
*/
#define luaV_fastget(L,t,k,slot,f) \
(!ttistable(t) \
? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
: (slot = f(hvalue(t), k), /* else, do raw access */ \
!ttisnil(slot))) /* result not nil? */
/*
** standard implementation for 'gettable'
*/
#define luaV_gettable(L,t,k,v) { const TValue *slot; \
if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
else luaV_finishget(L,t,k,v,slot); }
/*
** Fast track for set table. If 't' is a table and 't[k]' is not nil,
** call GC barrier, do a raw 't[k]=v', and return true; otherwise,
** return false with 'slot' equal to NULL (if 't' is not a table) or
** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro
** returns true, there is no need to 'invalidateTMcache', because the
** call is not creating a new entry.
*/
#define luaV_fastset(L,t,k,slot,f,v) \
(!ttistable(t) \
? (slot = NULL, 0) \
: (slot = f(hvalue(t), k), \
ttisnil(slot) ? 0 \
: (luaC_barrierback(L, hvalue(t), v), \
setobj2t(L, cast(TValue *,slot), v), \
1)))
#define luaV_rawequalobj(o1,o2) equalobj(NULL,o1,o2)
#define luaV_settable(L,t,k,v) { const TValue *slot; \
if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
luaV_finishset(L,t,k,v,slot); }
/* not to called directly */
LUAI_FUNC int luaV_equalobj_ (lua_State *L, const TValue *t1, const TValue *t2);
LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r); LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
LUAI_FUNC const TValue *luaV_tonumber (const TValue *obj, TValue *n); LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
LUAI_FUNC int luaV_tostring (lua_State *L, StkId obj); LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
LUAI_FUNC void luaV_gettable (lua_State *L, const TValue *t, TValue *key, LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
StkId val); StkId val, const TValue *slot);
LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key, LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
StkId val); StkId val, const TValue *slot);
LUAI_FUNC void luaV_finishOp (lua_State *L); LUAI_FUNC void luaV_finishOp (lua_State *L);
LUAI_FUNC void luaV_execute (lua_State *L); LUAI_FUNC void luaV_execute (lua_State *L);
LUAI_FUNC void luaV_concat (lua_State *L, int total); LUAI_FUNC void luaV_concat (lua_State *L, int total);
LUAI_FUNC void luaV_arith (lua_State *L, StkId ra, const TValue *rb, LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y);
const TValue *rc, TMS op); LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb); LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
#endif #endif

@ -1,5 +1,5 @@
/* /*
** $Id: lzio.h,v 1.26.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lzio.h,v 1.31 2015/09/08 15:41:05 roberto Exp $
** Buffered streams ** Buffered streams
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -32,20 +32,21 @@ typedef struct Mbuffer {
#define luaZ_sizebuffer(buff) ((buff)->buffsize) #define luaZ_sizebuffer(buff) ((buff)->buffsize)
#define luaZ_bufflen(buff) ((buff)->n) #define luaZ_bufflen(buff) ((buff)->n)
#define luaZ_buffremove(buff,i) ((buff)->n -= (i))
#define luaZ_resetbuffer(buff) ((buff)->n = 0) #define luaZ_resetbuffer(buff) ((buff)->n = 0)
#define luaZ_resizebuffer(L, buff, size) \ #define luaZ_resizebuffer(L, buff, size) \
(luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \ ((buff)->buffer = luaM_reallocvchar(L, (buff)->buffer, \
(buff)->buffsize, size), \
(buff)->buffsize = size) (buff)->buffsize = size)
#define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0) #define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0)
LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
void *data); void *data);
LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */ LUAI_FUNC size_t luaZ_read (ZIO* z, void *b, size_t n); /* read next n bytes */
@ -55,7 +56,7 @@ struct Zio {
size_t n; /* bytes still unread */ size_t n; /* bytes still unread */
const char *p; /* current position in buffer */ const char *p; /* current position in buffer */
lua_Reader reader; /* reader function */ lua_Reader reader; /* reader function */
void* data; /* additional data */ void *data; /* additional data */
lua_State *L; /* Lua state (for reader) */ lua_State *L; /* Lua state (for reader) */
}; };

File diff suppressed because it is too large Load Diff

@ -1,9 +1,14 @@
/* /*
** $Id: lauxlib.c,v 1.248.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lauxlib.c,v 1.286 2016/01/08 15:33:09 roberto Exp $
** Auxiliary functions for building Lua libraries ** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define lauxlib_c
#define LUA_LIB
#include "lprefix.h"
#include <errno.h> #include <errno.h>
#include <stdarg.h> #include <stdarg.h>
@ -12,13 +17,11 @@
#include <string.h> #include <string.h>
/* This file uses only the official API of Lua. /*
** This file uses only the official API of Lua.
** Any function declared here could be written as an application function. ** Any function declared here could be written as an application function.
*/ */
#define lauxlib_c
#define LUA_LIB
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
@ -31,8 +34,8 @@
*/ */
#define LEVELS1 12 /* size of the first part of the stack */ #define LEVELS1 10 /* size of the first part of the stack */
#define LEVELS2 10 /* size of the second part of the stack */ #define LEVELS2 11 /* size of the second part of the stack */
@ -64,11 +67,20 @@ static int findfield (lua_State *L, int objidx, int level) {
} }
/*
** Search for a name for a function in all loaded modules
** (registry._LOADED).
*/
static int pushglobalfuncname (lua_State *L, lua_Debug *ar) { static int pushglobalfuncname (lua_State *L, lua_Debug *ar) {
int top = lua_gettop(L); int top = lua_gettop(L);
lua_getinfo(L, "f", ar); /* push function */ lua_getinfo(L, "f", ar); /* push function */
lua_pushglobaltable(L); lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
if (findfield(L, top + 1, 2)) { if (findfield(L, top + 1, 2)) {
const char *name = lua_tostring(L, -1);
if (strncmp(name, "_G.", 3) == 0) { /* name start with '_G.'? */
lua_pushstring(L, name + 3); /* push name without prefix */
lua_remove(L, -2); /* remove original name */
}
lua_copy(L, -1, top + 1); /* move name to proper place */ lua_copy(L, -1, top + 1); /* move name to proper place */
lua_pop(L, 2); /* remove pushed values */ lua_pop(L, 2); /* remove pushed values */
return 1; return 1;
@ -81,24 +93,22 @@ static int pushglobalfuncname (lua_State *L, lua_Debug *ar) {
static void pushfuncname (lua_State *L, lua_Debug *ar) { static void pushfuncname (lua_State *L, lua_Debug *ar) {
if (*ar->namewhat != '\0') /* is there a name? */ if (pushglobalfuncname(L, ar)) { /* try first a global name */
lua_pushfstring(L, "function " LUA_QS, ar->name); lua_pushfstring(L, "function '%s'", lua_tostring(L, -1));
lua_remove(L, -2); /* remove name */
}
else if (*ar->namewhat != '\0') /* is there a name from code? */
lua_pushfstring(L, "%s '%s'", ar->namewhat, ar->name); /* use it */
else if (*ar->what == 'm') /* main? */ else if (*ar->what == 'm') /* main? */
lua_pushliteral(L, "main chunk"); lua_pushliteral(L, "main chunk");
else if (*ar->what == 'C') { else if (*ar->what != 'C') /* for Lua functions, use <file:line> */
if (pushglobalfuncname(L, ar)) {
lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1));
lua_remove(L, -2); /* remove name */
}
else
lua_pushliteral(L, "?");
}
else
lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined); lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined);
else /* nothing left... */
lua_pushliteral(L, "?");
} }
static int countlevels (lua_State *L) { static int lastlevel (lua_State *L) {
lua_Debug ar; lua_Debug ar;
int li = 1, le = 1; int li = 1, le = 1;
/* find an upper bound */ /* find an upper bound */
@ -117,14 +127,16 @@ LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1,
const char *msg, int level) { const char *msg, int level) {
lua_Debug ar; lua_Debug ar;
int top = lua_gettop(L); int top = lua_gettop(L);
int numlevels = countlevels(L1); int last = lastlevel(L1);
int mark = (numlevels > LEVELS1 + LEVELS2) ? LEVELS1 : 0; int n1 = (last - level > LEVELS1 + LEVELS2) ? LEVELS1 : -1;
if (msg) lua_pushfstring(L, "%s\n", msg); if (msg)
lua_pushfstring(L, "%s\n", msg);
luaL_checkstack(L, 10, NULL);
lua_pushliteral(L, "stack traceback:"); lua_pushliteral(L, "stack traceback:");
while (lua_getstack(L1, level++, &ar)) { while (lua_getstack(L1, level++, &ar)) {
if (level == mark) { /* too many levels? */ if (n1-- == 0) { /* too many levels? */
lua_pushliteral(L, "\n\t..."); /* add a '...' */ lua_pushliteral(L, "\n\t..."); /* add a '...' */
level = numlevels - LEVELS2; /* and skip to last ones */ level = last - LEVELS2 + 1; /* and skip to last ones */
} }
else { else {
lua_getinfo(L1, "Slnt", &ar); lua_getinfo(L1, "Slnt", &ar);
@ -150,36 +162,47 @@ LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1,
** ======================================================= ** =======================================================
*/ */
LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) { LUALIB_API int luaL_argerror (lua_State *L, int arg, const char *extramsg) {
lua_Debug ar; lua_Debug ar;
if (!lua_getstack(L, 0, &ar)) /* no stack frame? */ if (!lua_getstack(L, 0, &ar)) /* no stack frame? */
return luaL_error(L, "bad argument #%d (%s)", narg, extramsg); return luaL_error(L, "bad argument #%d (%s)", arg, extramsg);
lua_getinfo(L, "n", &ar); lua_getinfo(L, "n", &ar);
if (strcmp(ar.namewhat, "method") == 0) { if (strcmp(ar.namewhat, "method") == 0) {
narg--; /* do not count `self' */ arg--; /* do not count 'self' */
if (narg == 0) /* error is in the self argument itself? */ if (arg == 0) /* error is in the self argument itself? */
return luaL_error(L, "calling " LUA_QS " on bad self (%s)", return luaL_error(L, "calling '%s' on bad self (%s)",
ar.name, extramsg); ar.name, extramsg);
} }
if (ar.name == NULL) if (ar.name == NULL)
ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?"; ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?";
return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)", return luaL_error(L, "bad argument #%d to '%s' (%s)",
narg, ar.name, extramsg); arg, ar.name, extramsg);
} }
static int typeerror (lua_State *L, int narg, const char *tname) { static int typeerror (lua_State *L, int arg, const char *tname) {
const char *msg = lua_pushfstring(L, "%s expected, got %s", const char *msg;
tname, luaL_typename(L, narg)); const char *typearg; /* name for the type of the actual argument */
return luaL_argerror(L, narg, msg); if (luaL_getmetafield(L, arg, "__name") == LUA_TSTRING)
typearg = lua_tostring(L, -1); /* use the given type name */
else if (lua_type(L, arg) == LUA_TLIGHTUSERDATA)
typearg = "light userdata"; /* special name for messages */
else
typearg = luaL_typename(L, arg); /* standard name */
msg = lua_pushfstring(L, "%s expected, got %s", tname, typearg);
return luaL_argerror(L, arg, msg);
} }
static void tag_error (lua_State *L, int narg, int tag) { static void tag_error (lua_State *L, int arg, int tag) {
typeerror(L, narg, lua_typename(L, tag)); typeerror(L, arg, lua_typename(L, tag));
} }
/*
** The use of 'lua_pushfstring' ensures this function does not
** need reserved stack space when called.
*/
LUALIB_API void luaL_where (lua_State *L, int level) { LUALIB_API void luaL_where (lua_State *L, int level) {
lua_Debug ar; lua_Debug ar;
if (lua_getstack(L, level, &ar)) { /* check function at level */ if (lua_getstack(L, level, &ar)) { /* check function at level */
@ -189,10 +212,15 @@ LUALIB_API void luaL_where (lua_State *L, int level) {
return; return;
} }
} }
lua_pushliteral(L, ""); /* else, no information available... */ lua_pushfstring(L, ""); /* else, no information available... */
} }
/*
** Again, the use of 'lua_pushvfstring' ensures this function does
** not need reserved stack space when called. (At worst, it generates
** an error with "stack overflow" instead of the given message.)
*/
LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) { LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
va_list argp; va_list argp;
va_start(argp, fmt); va_start(argp, fmt);
@ -222,7 +250,7 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
} }
#if !defined(inspectstat) /* { */ #if !defined(l_inspectstat) /* { */
#if defined(LUA_USE_POSIX) #if defined(LUA_USE_POSIX)
@ -231,13 +259,13 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
/* /*
** use appropriate macros to interpret 'pclose' return status ** use appropriate macros to interpret 'pclose' return status
*/ */
#define inspectstat(stat,what) \ #define l_inspectstat(stat,what) \
if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \ if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \
else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; } else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; }
#else #else
#define inspectstat(stat,what) /* no op */ #define l_inspectstat(stat,what) /* no op */
#endif #endif
@ -249,7 +277,7 @@ LUALIB_API int luaL_execresult (lua_State *L, int stat) {
if (stat == -1) /* error? */ if (stat == -1) /* error? */
return luaL_fileresult(L, 0, NULL); return luaL_fileresult(L, 0, NULL);
else { else {
inspectstat(stat, what); /* interpret result */ l_inspectstat(stat, what); /* interpret result */
if (*what == 'e' && stat == 0) /* successful termination? */ if (*what == 'e' && stat == 0) /* successful termination? */
lua_pushboolean(L, 1); lua_pushboolean(L, 1);
else else
@ -270,11 +298,12 @@ LUALIB_API int luaL_execresult (lua_State *L, int stat) {
*/ */
LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) { LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
luaL_getmetatable(L, tname); /* try to get metatable */ if (luaL_getmetatable(L, tname) != LUA_TNIL) /* name already in use? */
if (!lua_isnil(L, -1)) /* name already in use? */
return 0; /* leave previous value on top, but return 0 */ return 0; /* leave previous value on top, but return 0 */
lua_pop(L, 1); lua_pop(L, 1);
lua_newtable(L); /* create metatable */ lua_createtable(L, 0, 2); /* create metatable */
lua_pushstring(L, tname);
lua_setfield(L, -2, "__name"); /* metatable.__name = tname */
lua_pushvalue(L, -1); lua_pushvalue(L, -1);
lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */ lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */
return 1; return 1;
@ -317,23 +346,28 @@ LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
** ======================================================= ** =======================================================
*/ */
LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def, LUALIB_API int luaL_checkoption (lua_State *L, int arg, const char *def,
const char *const lst[]) { const char *const lst[]) {
const char *name = (def) ? luaL_optstring(L, narg, def) : const char *name = (def) ? luaL_optstring(L, arg, def) :
luaL_checkstring(L, narg); luaL_checkstring(L, arg);
int i; int i;
for (i=0; lst[i]; i++) for (i=0; lst[i]; i++)
if (strcmp(lst[i], name) == 0) if (strcmp(lst[i], name) == 0)
return i; return i;
return luaL_argerror(L, narg, return luaL_argerror(L, arg,
lua_pushfstring(L, "invalid option " LUA_QS, name)); lua_pushfstring(L, "invalid option '%s'", name));
} }
/*
** Ensures the stack has at least 'space' extra slots, raising an error
** if it cannot fulfill the request. (The error handling needs a few
** extra slots to format the error message. In case of an error without
** this extra space, Lua will generate the same 'stack overflow' error,
** but without 'msg'.)
*/
LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) { LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) {
/* keep some extra space to run error routines, if needed */ if (!lua_checkstack(L, space)) {
const int extra = LUA_MINSTACK;
if (!lua_checkstack(L, space + extra)) {
if (msg) if (msg)
luaL_error(L, "stack overflow (%s)", msg); luaL_error(L, "stack overflow (%s)", msg);
else else
@ -342,77 +376,71 @@ LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) {
} }
LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) { LUALIB_API void luaL_checktype (lua_State *L, int arg, int t) {
if (lua_type(L, narg) != t) if (lua_type(L, arg) != t)
tag_error(L, narg, t); tag_error(L, arg, t);
} }
LUALIB_API void luaL_checkany (lua_State *L, int narg) { LUALIB_API void luaL_checkany (lua_State *L, int arg) {
if (lua_type(L, narg) == LUA_TNONE) if (lua_type(L, arg) == LUA_TNONE)
luaL_argerror(L, narg, "value expected"); luaL_argerror(L, arg, "value expected");
} }
LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) { LUALIB_API const char *luaL_checklstring (lua_State *L, int arg, size_t *len) {
const char *s = lua_tolstring(L, narg, len); const char *s = lua_tolstring(L, arg, len);
if (!s) tag_error(L, narg, LUA_TSTRING); if (!s) tag_error(L, arg, LUA_TSTRING);
return s; return s;
} }
LUALIB_API const char *luaL_optlstring (lua_State *L, int narg, LUALIB_API const char *luaL_optlstring (lua_State *L, int arg,
const char *def, size_t *len) { const char *def, size_t *len) {
if (lua_isnoneornil(L, narg)) { if (lua_isnoneornil(L, arg)) {
if (len) if (len)
*len = (def ? strlen(def) : 0); *len = (def ? strlen(def) : 0);
return def; return def;
} }
else return luaL_checklstring(L, narg, len); else return luaL_checklstring(L, arg, len);
} }
LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) { LUALIB_API lua_Number luaL_checknumber (lua_State *L, int arg) {
int isnum; int isnum;
lua_Number d = lua_tonumberx(L, narg, &isnum); lua_Number d = lua_tonumberx(L, arg, &isnum);
if (!isnum) if (!isnum)
tag_error(L, narg, LUA_TNUMBER); tag_error(L, arg, LUA_TNUMBER);
return d; return d;
} }
LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) { LUALIB_API lua_Number luaL_optnumber (lua_State *L, int arg, lua_Number def) {
return luaL_opt(L, luaL_checknumber, narg, def); return luaL_opt(L, luaL_checknumber, arg, def);
} }
LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) { static void interror (lua_State *L, int arg) {
int isnum; if (lua_isnumber(L, arg))
lua_Integer d = lua_tointegerx(L, narg, &isnum); luaL_argerror(L, arg, "number has no integer representation");
if (!isnum) else
tag_error(L, narg, LUA_TNUMBER); tag_error(L, arg, LUA_TNUMBER);
return d;
} }
LUALIB_API lua_Unsigned luaL_checkunsigned (lua_State *L, int narg) { LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int arg) {
int isnum; int isnum;
lua_Unsigned d = lua_tounsignedx(L, narg, &isnum); lua_Integer d = lua_tointegerx(L, arg, &isnum);
if (!isnum) if (!isnum) {
tag_error(L, narg, LUA_TNUMBER); interror(L, arg);
}
return d; return d;
} }
LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg, LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int arg,
lua_Integer def) { lua_Integer def) {
return luaL_opt(L, luaL_checkinteger, narg, def); return luaL_opt(L, luaL_checkinteger, arg, def);
}
LUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg,
lua_Unsigned def) {
return luaL_opt(L, luaL_checkunsigned, narg, def);
} }
/* }====================================================== */ /* }====================================================== */
@ -424,6 +452,47 @@ LUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg,
** ======================================================= ** =======================================================
*/ */
/* userdata to box arbitrary data */
typedef struct UBox {
void *box;
size_t bsize;
} UBox;
static void *resizebox (lua_State *L, int idx, size_t newsize) {
void *ud;
lua_Alloc allocf = lua_getallocf(L, &ud);
UBox *box = (UBox *)lua_touserdata(L, idx);
void *temp = allocf(ud, box->box, box->bsize, newsize);
if (temp == NULL && newsize > 0) { /* allocation error? */
resizebox(L, idx, 0); /* free buffer */
luaL_error(L, "not enough memory for buffer allocation");
}
box->box = temp;
box->bsize = newsize;
return temp;
}
static int boxgc (lua_State *L) {
resizebox(L, 1, 0);
return 0;
}
static void *newbox (lua_State *L, size_t newsize) {
UBox *box = (UBox *)lua_newuserdata(L, sizeof(UBox));
box->box = NULL;
box->bsize = 0;
if (luaL_newmetatable(L, "LUABOX")) { /* creating metatable? */
lua_pushcfunction(L, boxgc);
lua_setfield(L, -2, "__gc"); /* metatable.__gc = boxgc */
}
lua_setmetatable(L, -2);
return resizebox(L, -1, newsize);
}
/* /*
** check whether buffer is using a userdata on the stack as a temporary ** check whether buffer is using a userdata on the stack as a temporary
** buffer ** buffer
@ -444,11 +513,12 @@ LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) {
if (newsize < B->n || newsize - B->n < sz) if (newsize < B->n || newsize - B->n < sz)
luaL_error(L, "buffer too large"); luaL_error(L, "buffer too large");
/* create larger buffer */ /* create larger buffer */
newbuff = (char *)lua_newuserdata(L, newsize * sizeof(char));
/* move content to new buffer */
memcpy(newbuff, B->b, B->n * sizeof(char));
if (buffonstack(B)) if (buffonstack(B))
lua_remove(L, -2); /* remove old buffer */ newbuff = (char *)resizebox(L, -1, newsize);
else { /* no buffer yet */
newbuff = (char *)newbox(L, newsize);
memcpy(newbuff, B->b, B->n * sizeof(char)); /* copy original content */
}
B->b = newbuff; B->b = newbuff;
B->size = newsize; B->size = newsize;
} }
@ -457,9 +527,11 @@ LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) {
LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) { LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {
char *b = luaL_prepbuffsize(B, l); if (l > 0) { /* avoid 'memcpy' when 's' can be NULL */
memcpy(b, s, l * sizeof(char)); char *b = luaL_prepbuffsize(B, l);
luaL_addsize(B, l); memcpy(b, s, l * sizeof(char));
luaL_addsize(B, l);
}
} }
@ -471,8 +543,10 @@ LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {
LUALIB_API void luaL_pushresult (luaL_Buffer *B) { LUALIB_API void luaL_pushresult (luaL_Buffer *B) {
lua_State *L = B->L; lua_State *L = B->L;
lua_pushlstring(L, B->b, B->n); lua_pushlstring(L, B->b, B->n);
if (buffonstack(B)) if (buffonstack(B)) {
lua_remove(L, -2); /* remove old buffer */ resizebox(L, -2, 0); /* delete old buffer */
lua_remove(L, -2); /* remove its header from the stack */
}
} }
@ -523,7 +597,7 @@ LUALIB_API int luaL_ref (lua_State *L, int t) {
int ref; int ref;
if (lua_isnil(L, -1)) { if (lua_isnil(L, -1)) {
lua_pop(L, 1); /* remove from stack */ lua_pop(L, 1); /* remove from stack */
return LUA_REFNIL; /* `nil' has a unique fixed reference */ return LUA_REFNIL; /* 'nil' has a unique fixed reference */
} }
t = lua_absindex(L, t); t = lua_absindex(L, t);
lua_rawgeti(L, t, freelist); /* get first free element */ lua_rawgeti(L, t, freelist); /* get first free element */
@ -562,7 +636,7 @@ LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
typedef struct LoadF { typedef struct LoadF {
int n; /* number of pre-read characters */ int n; /* number of pre-read characters */
FILE *f; /* file being read */ FILE *f; /* file being read */
char buff[LUAL_BUFFERSIZE]; /* area for reading file */ char buff[BUFSIZ]; /* area for reading file */
} LoadF; } LoadF;
@ -594,7 +668,7 @@ static int errfile (lua_State *L, const char *what, int fnameindex) {
static int skipBOM (LoadF *lf) { static int skipBOM (LoadF *lf) {
const char *p = "\xEF\xBB\xBF"; /* Utf8 BOM mark */ const char *p = "\xEF\xBB\xBF"; /* UTF-8 BOM mark */
int c; int c;
lf->n = 0; lf->n = 0;
do { do {
@ -619,7 +693,7 @@ static int skipcomment (LoadF *lf, int *cp) {
if (c == '#') { /* first line is a comment (Unix exec. file)? */ if (c == '#') { /* first line is a comment (Unix exec. file)? */
do { /* skip first line */ do { /* skip first line */
c = getc(lf->f); c = getc(lf->f);
} while (c != EOF && c != '\n') ; } while (c != EOF && c != '\n');
*cp = getc(lf->f); /* skip end-of-line, if present */ *cp = getc(lf->f); /* skip end-of-line, if present */
return 1; /* there was a comment */ return 1; /* there was a comment */
} }
@ -655,7 +729,7 @@ LUALIB_API int luaL_loadfilex (lua_State *L, const char *filename,
readstatus = ferror(lf.f); readstatus = ferror(lf.f);
if (filename) fclose(lf.f); /* close file (even in case of errors) */ if (filename) fclose(lf.f); /* close file (even in case of errors) */
if (readstatus) { if (readstatus) {
lua_settop(L, fnameindex); /* ignore results from `lua_load' */ lua_settop(L, fnameindex); /* ignore results from 'lua_load' */
return errfile(L, "read", fnameindex); return errfile(L, "read", fnameindex);
} }
lua_remove(L, fnameindex); lua_remove(L, fnameindex);
@ -698,23 +772,23 @@ LUALIB_API int luaL_loadstring (lua_State *L, const char *s) {
LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) { LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
if (!lua_getmetatable(L, obj)) /* no metatable? */ if (!lua_getmetatable(L, obj)) /* no metatable? */
return 0; return LUA_TNIL;
lua_pushstring(L, event);
lua_rawget(L, -2);
if (lua_isnil(L, -1)) {
lua_pop(L, 2); /* remove metatable and metafield */
return 0;
}
else { else {
lua_remove(L, -2); /* remove only metatable */ int tt;
return 1; lua_pushstring(L, event);
tt = lua_rawget(L, -2);
if (tt == LUA_TNIL) /* is metafield nil? */
lua_pop(L, 2); /* remove metatable and metafield */
else
lua_remove(L, -2); /* remove only metatable */
return tt; /* return metafield type */
} }
} }
LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) { LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
obj = lua_absindex(L, obj); obj = lua_absindex(L, obj);
if (!luaL_getmetafield(L, obj, event)) /* no metafield? */ if (luaL_getmetafield(L, obj, event) == LUA_TNIL) /* no metafield? */
return 0; return 0;
lua_pushvalue(L, obj); lua_pushvalue(L, obj);
lua_call(L, 1, 1); lua_call(L, 1, 1);
@ -722,13 +796,13 @@ LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
} }
LUALIB_API int luaL_len (lua_State *L, int idx) { LUALIB_API lua_Integer luaL_len (lua_State *L, int idx) {
int l; lua_Integer l;
int isnum; int isnum;
lua_len(L, idx); lua_len(L, idx);
l = (int)lua_tointegerx(L, -1, &isnum); l = lua_tointegerx(L, -1, &isnum);
if (!isnum) if (!isnum)
luaL_error(L, "object length is not a number"); luaL_error(L, "object length is not an integer");
lua_pop(L, 1); /* remove object */ lua_pop(L, 1); /* remove object */
return l; return l;
} }
@ -737,7 +811,13 @@ LUALIB_API int luaL_len (lua_State *L, int idx) {
LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) { LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
if (!luaL_callmeta(L, idx, "__tostring")) { /* no metafield? */ if (!luaL_callmeta(L, idx, "__tostring")) { /* no metafield? */
switch (lua_type(L, idx)) { switch (lua_type(L, idx)) {
case LUA_TNUMBER: case LUA_TNUMBER: {
if (lua_isinteger(L, idx))
lua_pushfstring(L, "%I", lua_tointeger(L, idx));
else
lua_pushfstring(L, "%f", lua_tonumber(L, idx));
break;
}
case LUA_TSTRING: case LUA_TSTRING:
lua_pushvalue(L, idx); lua_pushvalue(L, idx);
break; break;
@ -772,8 +852,7 @@ static const char *luaL_findtable (lua_State *L, int idx,
e = strchr(fname, '.'); e = strchr(fname, '.');
if (e == NULL) e = fname + strlen(fname); if (e == NULL) e = fname + strlen(fname);
lua_pushlstring(L, fname, e - fname); lua_pushlstring(L, fname, e - fname);
lua_rawget(L, -2); if (lua_rawget(L, -2) == LUA_TNIL) { /* no such field? */
if (lua_isnil(L, -1)) { /* no such field? */
lua_pop(L, 1); /* remove this nil */ lua_pop(L, 1); /* remove this nil */
lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */ lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */
lua_pushlstring(L, fname, e - fname); lua_pushlstring(L, fname, e - fname);
@ -810,13 +889,12 @@ static int libsize (const luaL_Reg *l) {
LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname, LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname,
int sizehint) { int sizehint) {
luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1); /* get _LOADED table */ luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1); /* get _LOADED table */
lua_getfield(L, -1, modname); /* get _LOADED[modname] */ if (lua_getfield(L, -1, modname) != LUA_TTABLE) { /* no _LOADED[modname]? */
if (!lua_istable(L, -1)) { /* not found? */
lua_pop(L, 1); /* remove previous result */ lua_pop(L, 1); /* remove previous result */
/* try global variable (and create one if it does not exist) */ /* try global variable (and create one if it does not exist) */
lua_pushglobaltable(L); lua_pushglobaltable(L);
if (luaL_findtable(L, 0, modname, sizehint) != NULL) if (luaL_findtable(L, 0, modname, sizehint) != NULL)
luaL_error(L, "name conflict for module " LUA_QS, modname); luaL_error(L, "name conflict for module '%s'", modname);
lua_pushvalue(L, -1); lua_pushvalue(L, -1);
lua_setfield(L, -3, modname); /* _LOADED[modname] = new table */ lua_setfield(L, -3, modname); /* _LOADED[modname] = new table */
} }
@ -846,7 +924,6 @@ LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
** Returns with only the table at the stack. ** Returns with only the table at the stack.
*/ */
LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
luaL_checkversion(L);
luaL_checkstack(L, nup, "too many upvalues"); luaL_checkstack(L, nup, "too many upvalues");
for (; l->name != NULL; l++) { /* fill the table with given functions */ for (; l->name != NULL; l++) { /* fill the table with given functions */
int i; int i;
@ -864,8 +941,8 @@ LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
** into the stack ** into the stack
*/ */
LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) { LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) {
lua_getfield(L, idx, fname); if (lua_getfield(L, idx, fname) == LUA_TTABLE)
if (lua_istable(L, -1)) return 1; /* table already there */ return 1; /* table already there */
else { else {
lua_pop(L, 1); /* remove previous result */ lua_pop(L, 1); /* remove previous result */
idx = lua_absindex(L, idx); idx = lua_absindex(L, idx);
@ -878,22 +955,26 @@ LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) {
/* /*
** stripped-down 'require'. Calls 'openf' to open a module, ** Stripped-down 'require': After checking "loaded" table, calls 'openf'
** registers the result in 'package.loaded' table and, if 'glb' ** to open a module, registers the result in 'package.loaded' table and,
** is true, also registers the result in the global table. ** if 'glb' is true, also registers the result in the global table.
** Leaves resulting module on the top. ** Leaves resulting module on the top.
*/ */
LUALIB_API void luaL_requiref (lua_State *L, const char *modname, LUALIB_API void luaL_requiref (lua_State *L, const char *modname,
lua_CFunction openf, int glb) { lua_CFunction openf, int glb) {
lua_pushcfunction(L, openf);
lua_pushstring(L, modname); /* argument to open function */
lua_call(L, 1, 1); /* open module */
luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED"); luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
lua_pushvalue(L, -2); /* make copy of module (call result) */ lua_getfield(L, -1, modname); /* _LOADED[modname] */
lua_setfield(L, -2, modname); /* _LOADED[modname] = module */ if (!lua_toboolean(L, -1)) { /* package not already loaded? */
lua_pop(L, 1); /* remove _LOADED table */ lua_pop(L, 1); /* remove field */
lua_pushcfunction(L, openf);
lua_pushstring(L, modname); /* argument to open function */
lua_call(L, 1, 1); /* call 'openf' to open module */
lua_pushvalue(L, -1); /* make copy of module (call result) */
lua_setfield(L, -3, modname); /* _LOADED[modname] = module */
}
lua_remove(L, -2); /* remove _LOADED table */
if (glb) { if (glb) {
lua_pushvalue(L, -1); /* copy of 'mod' */ lua_pushvalue(L, -1); /* copy of module */
lua_setglobal(L, modname); /* _G[modname] = module */ lua_setglobal(L, modname); /* _G[modname] = module */
} }
} }
@ -908,7 +989,7 @@ LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p,
while ((wild = strstr(s, p)) != NULL) { while ((wild = strstr(s, p)) != NULL) {
luaL_addlstring(&b, s, wild - s); /* push prefix */ luaL_addlstring(&b, s, wild - s); /* push prefix */
luaL_addstring(&b, r); /* push replacement in place of pattern */ luaL_addstring(&b, r); /* push replacement in place of pattern */
s = wild + l; /* continue after `p' */ s = wild + l; /* continue after 'p' */
} }
luaL_addstring(&b, s); /* push last suffix */ luaL_addstring(&b, s); /* push last suffix */
luaL_pushresult(&b); luaL_pushresult(&b);
@ -928,8 +1009,8 @@ static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
static int panic (lua_State *L) { static int panic (lua_State *L) {
luai_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n", lua_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n",
lua_tostring(L, -1)); lua_tostring(L, -1));
return 0; /* return to Lua to abort */ return 0; /* return to Lua to abort */
} }
@ -941,19 +1022,14 @@ LUALIB_API lua_State *luaL_newstate (void) {
} }
LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver) { LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) {
const lua_Number *v = lua_version(L); const lua_Number *v = lua_version(L);
if (sz != LUAL_NUMSIZES) /* check numeric types */
luaL_error(L, "core and library have incompatible numeric types");
if (v != lua_version(NULL)) if (v != lua_version(NULL))
luaL_error(L, "multiple Lua VMs detected"); luaL_error(L, "multiple Lua VMs detected");
else if (*v != ver) else if (*v != ver)
luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f", luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
ver, *v); ver, *v);
/* check conversions number -> integer types */
lua_pushnumber(L, -(lua_Number)0x1234);
if (lua_tointeger(L, -1) != -0x1234 ||
lua_tounsigned(L, -1) != (lua_Unsigned)-0x1234)
luaL_error(L, "bad conversion number->int;"
" must recompile Lua with proper settings");
lua_pop(L, 1);
} }

@ -1,9 +1,13 @@
/* /*
** $Id: lbaselib.c,v 1.276.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lbaselib.c,v 1.313 2016/04/11 19:18:40 roberto Exp $
** Basic library ** Basic library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define lbaselib_c
#define LUA_LIB
#include "lprefix.h"
#include <ctype.h> #include <ctype.h>
@ -11,9 +15,6 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define lbaselib_c
#define LUA_LIB
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
@ -32,65 +33,77 @@ static int luaB_print (lua_State *L) {
lua_call(L, 1, 1); lua_call(L, 1, 1);
s = lua_tolstring(L, -1, &l); /* get result */ s = lua_tolstring(L, -1, &l); /* get result */
if (s == NULL) if (s == NULL)
return luaL_error(L, return luaL_error(L, "'tostring' must return a string to 'print'");
LUA_QL("tostring") " must return a string to " LUA_QL("print")); if (i>1) lua_writestring("\t", 1);
if (i>1) luai_writestring("\t", 1); lua_writestring(s, l);
luai_writestring(s, l);
lua_pop(L, 1); /* pop result */ lua_pop(L, 1); /* pop result */
} }
luai_writeline(); lua_writeline();
return 0; return 0;
} }
#define SPACECHARS " \f\n\r\t\v" #define SPACECHARS " \f\n\r\t\v"
static const char *b_str2int (const char *s, int base, lua_Integer *pn) {
lua_Unsigned n = 0;
int neg = 0;
s += strspn(s, SPACECHARS); /* skip initial spaces */
if (*s == '-') { s++; neg = 1; } /* handle signal */
else if (*s == '+') s++;
if (!isalnum((unsigned char)*s)) /* no digit? */
return NULL;
do {
int digit = (isdigit((unsigned char)*s)) ? *s - '0'
: (toupper((unsigned char)*s) - 'A') + 10;
if (digit >= base) return NULL; /* invalid numeral */
n = n * base + digit;
s++;
} while (isalnum((unsigned char)*s));
s += strspn(s, SPACECHARS); /* skip trailing spaces */
*pn = (lua_Integer)((neg) ? (0u - n) : n);
return s;
}
static int luaB_tonumber (lua_State *L) { static int luaB_tonumber (lua_State *L) {
if (lua_isnoneornil(L, 2)) { /* standard conversion */ if (lua_isnoneornil(L, 2)) { /* standard conversion? */
int isnum;
lua_Number n = lua_tonumberx(L, 1, &isnum);
if (isnum) {
lua_pushnumber(L, n);
return 1;
} /* else not a number; must be something */
luaL_checkany(L, 1); luaL_checkany(L, 1);
if (lua_type(L, 1) == LUA_TNUMBER) { /* already a number? */
lua_settop(L, 1); /* yes; return it */
return 1;
}
else {
size_t l;
const char *s = lua_tolstring(L, 1, &l);
if (s != NULL && lua_stringtonumber(L, s) == l + 1)
return 1; /* successful conversion to number */
/* else not a number */
}
} }
else { else {
size_t l; size_t l;
const char *s = luaL_checklstring(L, 1, &l); const char *s;
const char *e = s + l; /* end point for 's' */ lua_Integer n = 0; /* to avoid warnings */
int base = luaL_checkint(L, 2); lua_Integer base = luaL_checkinteger(L, 2);
int neg = 0; luaL_checktype(L, 1, LUA_TSTRING); /* no numbers as strings */
s = lua_tolstring(L, 1, &l);
luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range"); luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
s += strspn(s, SPACECHARS); /* skip initial spaces */ if (b_str2int(s, (int)base, &n) == s + l) {
if (*s == '-') { s++; neg = 1; } /* handle signal */ lua_pushinteger(L, n);
else if (*s == '+') s++; return 1;
if (isalnum((unsigned char)*s)) {
lua_Number n = 0;
do {
int digit = (isdigit((unsigned char)*s)) ? *s - '0'
: toupper((unsigned char)*s) - 'A' + 10;
if (digit >= base) break; /* invalid numeral; force a fail */
n = n * (lua_Number)base + (lua_Number)digit;
s++;
} while (isalnum((unsigned char)*s));
s += strspn(s, SPACECHARS); /* skip trailing spaces */
if (s == e) { /* no invalid trailing characters? */
lua_pushnumber(L, (neg) ? -n : n);
return 1;
} /* else not a number */
} /* else not a number */ } /* else not a number */
} } /* else not a number */
lua_pushnil(L); /* not a number */ lua_pushnil(L); /* not a number */
return 1; return 1;
} }
static int luaB_error (lua_State *L) { static int luaB_error (lua_State *L) {
int level = luaL_optint(L, 2, 1); int level = (int)luaL_optinteger(L, 2, 1);
lua_settop(L, 1); lua_settop(L, 1);
if (lua_isstring(L, 1) && level > 0) { /* add extra information? */ if (lua_type(L, 1) == LUA_TSTRING && level > 0) {
luaL_where(L, level); luaL_where(L, level); /* add extra information */
lua_pushvalue(L, 1); lua_pushvalue(L, 1);
lua_concat(L, 2); lua_concat(L, 2);
} }
@ -114,7 +127,7 @@ static int luaB_setmetatable (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE); luaL_checktype(L, 1, LUA_TTABLE);
luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2, luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
"nil or table expected"); "nil or table expected");
if (luaL_getmetafield(L, 1, "__metatable")) if (luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL)
return luaL_error(L, "cannot change a protected metatable"); return luaL_error(L, "cannot change a protected metatable");
lua_settop(L, 2); lua_settop(L, 2);
lua_setmetatable(L, 1); lua_setmetatable(L, 1);
@ -160,19 +173,18 @@ static int luaB_rawset (lua_State *L) {
static int luaB_collectgarbage (lua_State *L) { static int luaB_collectgarbage (lua_State *L) {
static const char *const opts[] = {"stop", "restart", "collect", static const char *const opts[] = {"stop", "restart", "collect",
"count", "step", "setpause", "setstepmul", "count", "step", "setpause", "setstepmul",
"setmajorinc", "isrunning", "generational", "incremental", NULL}; "isrunning", NULL};
static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT, static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL, LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL,
LUA_GCSETMAJORINC, LUA_GCISRUNNING, LUA_GCGEN, LUA_GCINC}; LUA_GCISRUNNING};
int o = optsnum[luaL_checkoption(L, 1, "collect", opts)]; int o = optsnum[luaL_checkoption(L, 1, "collect", opts)];
int ex = luaL_optint(L, 2, 0); int ex = (int)luaL_optinteger(L, 2, 0);
int res = lua_gc(L, o, ex); int res = lua_gc(L, o, ex);
switch (o) { switch (o) {
case LUA_GCCOUNT: { case LUA_GCCOUNT: {
int b = lua_gc(L, LUA_GCCOUNTB, 0); int b = lua_gc(L, LUA_GCCOUNTB, 0);
lua_pushnumber(L, res + ((lua_Number)b/1024)); lua_pushnumber(L, (lua_Number)res + ((lua_Number)b/1024));
lua_pushinteger(L, b); return 1;
return 2;
} }
case LUA_GCSTEP: case LUA_GCISRUNNING: { case LUA_GCSTEP: case LUA_GCISRUNNING: {
lua_pushboolean(L, res); lua_pushboolean(L, res);
@ -187,15 +199,16 @@ static int luaB_collectgarbage (lua_State *L) {
static int luaB_type (lua_State *L) { static int luaB_type (lua_State *L) {
luaL_checkany(L, 1); int t = lua_type(L, 1);
lua_pushstring(L, luaL_typename(L, 1)); luaL_argcheck(L, t != LUA_TNONE, 1, "value expected");
lua_pushstring(L, lua_typename(L, t));
return 1; return 1;
} }
static int pairsmeta (lua_State *L, const char *method, int iszero, static int pairsmeta (lua_State *L, const char *method, int iszero,
lua_CFunction iter) { lua_CFunction iter) {
if (!luaL_getmetafield(L, 1, method)) { /* no metamethod? */ if (luaL_getmetafield(L, 1, method) == LUA_TNIL) { /* no metamethod? */
luaL_checktype(L, 1, LUA_TTABLE); /* argument must be a table */ luaL_checktype(L, 1, LUA_TTABLE); /* argument must be a table */
lua_pushcfunction(L, iter); /* will return generator, */ lua_pushcfunction(L, iter); /* will return generator, */
lua_pushvalue(L, 1); /* state, */ lua_pushvalue(L, 1); /* state, */
@ -227,18 +240,30 @@ static int luaB_pairs (lua_State *L) {
} }
/*
** Traversal function for 'ipairs'
*/
static int ipairsaux (lua_State *L) { static int ipairsaux (lua_State *L) {
int i = luaL_checkint(L, 2); lua_Integer i = luaL_checkinteger(L, 2) + 1;
luaL_checktype(L, 1, LUA_TTABLE);
i++; /* next value */
lua_pushinteger(L, i); lua_pushinteger(L, i);
lua_rawgeti(L, 1, i); return (lua_geti(L, 1, i) == LUA_TNIL) ? 1 : 2;
return (lua_isnil(L, -1)) ? 1 : 2;
} }
/*
** 'ipairs' function. Returns 'ipairsaux', given "table", 0.
** (The given "table" may not be a table.)
*/
static int luaB_ipairs (lua_State *L) { static int luaB_ipairs (lua_State *L) {
#if defined(LUA_COMPAT_IPAIRS)
return pairsmeta(L, "__ipairs", 1, ipairsaux); return pairsmeta(L, "__ipairs", 1, ipairsaux);
#else
luaL_checkany(L, 1);
lua_pushcfunction(L, ipairsaux); /* iteration function */
lua_pushvalue(L, 1); /* state */
lua_pushinteger(L, 0); /* initial value */
return 3;
#endif
} }
@ -284,7 +309,7 @@ static int luaB_loadfile (lua_State *L) {
/* /*
** Reader for generic `load' function: `lua_load' uses the ** Reader for generic 'load' function: 'lua_load' uses the
** stack for internal stuff, so the reader cannot change the ** stack for internal stuff, so the reader cannot change the
** stack top. Instead, it keeps its resulting string in a ** stack top. Instead, it keeps its resulting string in a
** reserved slot inside the stack. ** reserved slot inside the stack.
@ -328,7 +353,8 @@ static int luaB_load (lua_State *L) {
/* }====================================================== */ /* }====================================================== */
static int dofilecont (lua_State *L) { static int dofilecont (lua_State *L, int d1, lua_KContext d2) {
(void)d1; (void)d2; /* only to match 'lua_Kfunction' prototype */
return lua_gettop(L) - 1; return lua_gettop(L) - 1;
} }
@ -339,14 +365,20 @@ static int luaB_dofile (lua_State *L) {
if (luaL_loadfile(L, fname) != LUA_OK) if (luaL_loadfile(L, fname) != LUA_OK)
return lua_error(L); return lua_error(L);
lua_callk(L, 0, LUA_MULTRET, 0, dofilecont); lua_callk(L, 0, LUA_MULTRET, 0, dofilecont);
return dofilecont(L); return dofilecont(L, 0, 0);
} }
static int luaB_assert (lua_State *L) { static int luaB_assert (lua_State *L) {
if (!lua_toboolean(L, 1)) if (lua_toboolean(L, 1)) /* condition is true? */
return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!")); return lua_gettop(L); /* return all arguments */
return lua_gettop(L); else { /* error */
luaL_checkany(L, 1); /* there must be a condition */
lua_remove(L, 1); /* remove it */
lua_pushliteral(L, "assertion failed!"); /* default message */
lua_settop(L, 1); /* leave only message (default if no other one) */
return luaB_error(L); /* call 'error' */
}
} }
@ -357,53 +389,57 @@ static int luaB_select (lua_State *L) {
return 1; return 1;
} }
else { else {
int i = luaL_checkint(L, 1); lua_Integer i = luaL_checkinteger(L, 1);
if (i < 0) i = n + i; if (i < 0) i = n + i;
else if (i > n) i = n; else if (i > n) i = n;
luaL_argcheck(L, 1 <= i, 1, "index out of range"); luaL_argcheck(L, 1 <= i, 1, "index out of range");
return n - i; return n - (int)i;
} }
} }
static int finishpcall (lua_State *L, int status) { /*
if (!lua_checkstack(L, 1)) { /* no space for extra boolean? */ ** Continuation function for 'pcall' and 'xpcall'. Both functions
lua_settop(L, 0); /* create space for return values */ ** already pushed a 'true' before doing the call, so in case of success
lua_pushboolean(L, 0); ** 'finishpcall' only has to return everything in the stack minus
lua_pushstring(L, "stack overflow"); ** 'extra' values (where 'extra' is exactly the number of items to be
** ignored).
*/
static int finishpcall (lua_State *L, int status, lua_KContext extra) {
if (status != LUA_OK && status != LUA_YIELD) { /* error? */
lua_pushboolean(L, 0); /* first result (false) */
lua_pushvalue(L, -2); /* error message */
return 2; /* return false, msg */ return 2; /* return false, msg */
} }
lua_pushboolean(L, status); /* first result (status) */ else
lua_replace(L, 1); /* put first result in first slot */ return lua_gettop(L) - (int)extra; /* return all results */
return lua_gettop(L);
}
static int pcallcont (lua_State *L) {
int status = lua_getctx(L, NULL);
return finishpcall(L, (status == LUA_YIELD));
} }
static int luaB_pcall (lua_State *L) { static int luaB_pcall (lua_State *L) {
int status; int status;
luaL_checkany(L, 1); luaL_checkany(L, 1);
lua_pushnil(L); lua_pushboolean(L, 1); /* first result if no errors */
lua_insert(L, 1); /* create space for status result */ lua_insert(L, 1); /* put it in place */
status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, pcallcont); status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, finishpcall);
return finishpcall(L, (status == LUA_OK)); return finishpcall(L, status, 0);
} }
/*
** Do a protected call with error handling. After 'lua_rotate', the
** stack will have <f, err, true, f, [args...]>; so, the function passes
** 2 to 'finishpcall' to skip the 2 first values when returning results.
*/
static int luaB_xpcall (lua_State *L) { static int luaB_xpcall (lua_State *L) {
int status; int status;
int n = lua_gettop(L); int n = lua_gettop(L);
luaL_argcheck(L, n >= 2, 2, "value expected"); luaL_checktype(L, 2, LUA_TFUNCTION); /* check error function */
lua_pushvalue(L, 1); /* exchange function... */ lua_pushboolean(L, 1); /* first result */
lua_copy(L, 2, 1); /* ...and error handler */ lua_pushvalue(L, 1); /* function */
lua_replace(L, 2); lua_rotate(L, 3, 2); /* move them below function's arguments */
status = lua_pcallk(L, n - 2, LUA_MULTRET, 1, 0, pcallcont); status = lua_pcallk(L, n - 2, LUA_MULTRET, 2, 2, finishpcall);
return finishpcall(L, (status == LUA_OK)); return finishpcall(L, status, 2);
} }
@ -440,19 +476,23 @@ static const luaL_Reg base_funcs[] = {
{"tostring", luaB_tostring}, {"tostring", luaB_tostring},
{"type", luaB_type}, {"type", luaB_type},
{"xpcall", luaB_xpcall}, {"xpcall", luaB_xpcall},
/* placeholders */
{"_G", NULL},
{"_VERSION", NULL},
{NULL, NULL} {NULL, NULL}
}; };
LUAMOD_API int luaopen_base (lua_State *L) { LUAMOD_API int luaopen_base (lua_State *L) {
/* set global _G */
lua_pushglobaltable(L);
lua_pushglobaltable(L);
lua_setfield(L, -2, "_G");
/* open lib into global table */ /* open lib into global table */
lua_pushglobaltable(L);
luaL_setfuncs(L, base_funcs, 0); luaL_setfuncs(L, base_funcs, 0);
/* set global _G */
lua_pushvalue(L, -1);
lua_setfield(L, -2, "_G");
/* set global _VERSION */
lua_pushliteral(L, LUA_VERSION); lua_pushliteral(L, LUA_VERSION);
lua_setfield(L, -2, "_VERSION"); /* set global _VERSION */ lua_setfield(L, -2, "_VERSION");
return 1; return 1;
} }

@ -1,5 +1,5 @@
/* /*
** $Id: lbitlib.c,v 1.18.1.2 2013/07/09 18:01:41 roberto Exp $ ** $Id: lbitlib.c,v 1.30 2015/11/11 19:08:09 roberto Exp $
** Standard library for bitwise operations ** Standard library for bitwise operations
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -7,20 +7,36 @@
#define lbitlib_c #define lbitlib_c
#define LUA_LIB #define LUA_LIB
#include "lprefix.h"
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
#include "lualib.h" #include "lualib.h"
#if defined(LUA_COMPAT_BITLIB) /* { */
#define pushunsigned(L,n) lua_pushinteger(L, (lua_Integer)(n))
#define checkunsigned(L,i) ((lua_Unsigned)luaL_checkinteger(L,i))
/* number of bits to consider in a number */ /* number of bits to consider in a number */
#if !defined(LUA_NBITS) #if !defined(LUA_NBITS)
#define LUA_NBITS 32 #define LUA_NBITS 32
#endif #endif
/*
** a lua_Unsigned with its first LUA_NBITS bits equal to 1. (Shift must
** be made in two parts to avoid problems when LUA_NBITS is equal to the
** number of bits in a lua_Unsigned.)
*/
#define ALLONES (~(((~(lua_Unsigned)0) << (LUA_NBITS - 1)) << 1)) #define ALLONES (~(((~(lua_Unsigned)0) << (LUA_NBITS - 1)) << 1))
/* macro to trim extra bits */ /* macro to trim extra bits */
#define trim(x) ((x) & ALLONES) #define trim(x) ((x) & ALLONES)
@ -29,28 +45,25 @@
#define mask(n) (~((ALLONES << 1) << ((n) - 1))) #define mask(n) (~((ALLONES << 1) << ((n) - 1)))
typedef lua_Unsigned b_uint;
static lua_Unsigned andaux (lua_State *L) {
static b_uint andaux (lua_State *L) {
int i, n = lua_gettop(L); int i, n = lua_gettop(L);
b_uint r = ~(b_uint)0; lua_Unsigned r = ~(lua_Unsigned)0;
for (i = 1; i <= n; i++) for (i = 1; i <= n; i++)
r &= luaL_checkunsigned(L, i); r &= checkunsigned(L, i);
return trim(r); return trim(r);
} }
static int b_and (lua_State *L) { static int b_and (lua_State *L) {
b_uint r = andaux(L); lua_Unsigned r = andaux(L);
lua_pushunsigned(L, r); pushunsigned(L, r);
return 1; return 1;
} }
static int b_test (lua_State *L) { static int b_test (lua_State *L) {
b_uint r = andaux(L); lua_Unsigned r = andaux(L);
lua_pushboolean(L, r != 0); lua_pushboolean(L, r != 0);
return 1; return 1;
} }
@ -58,32 +71,32 @@ static int b_test (lua_State *L) {
static int b_or (lua_State *L) { static int b_or (lua_State *L) {
int i, n = lua_gettop(L); int i, n = lua_gettop(L);
b_uint r = 0; lua_Unsigned r = 0;
for (i = 1; i <= n; i++) for (i = 1; i <= n; i++)
r |= luaL_checkunsigned(L, i); r |= checkunsigned(L, i);
lua_pushunsigned(L, trim(r)); pushunsigned(L, trim(r));
return 1; return 1;
} }
static int b_xor (lua_State *L) { static int b_xor (lua_State *L) {
int i, n = lua_gettop(L); int i, n = lua_gettop(L);
b_uint r = 0; lua_Unsigned r = 0;
for (i = 1; i <= n; i++) for (i = 1; i <= n; i++)
r ^= luaL_checkunsigned(L, i); r ^= checkunsigned(L, i);
lua_pushunsigned(L, trim(r)); pushunsigned(L, trim(r));
return 1; return 1;
} }
static int b_not (lua_State *L) { static int b_not (lua_State *L) {
b_uint r = ~luaL_checkunsigned(L, 1); lua_Unsigned r = ~checkunsigned(L, 1);
lua_pushunsigned(L, trim(r)); pushunsigned(L, trim(r));
return 1; return 1;
} }
static int b_shift (lua_State *L, b_uint r, int i) { static int b_shift (lua_State *L, lua_Unsigned r, lua_Integer i) {
if (i < 0) { /* shift right? */ if (i < 0) { /* shift right? */
i = -i; i = -i;
r = trim(r); r = trim(r);
@ -95,54 +108,54 @@ static int b_shift (lua_State *L, b_uint r, int i) {
else r <<= i; else r <<= i;
r = trim(r); r = trim(r);
} }
lua_pushunsigned(L, r); pushunsigned(L, r);
return 1; return 1;
} }
static int b_lshift (lua_State *L) { static int b_lshift (lua_State *L) {
return b_shift(L, luaL_checkunsigned(L, 1), luaL_checkint(L, 2)); return b_shift(L, checkunsigned(L, 1), luaL_checkinteger(L, 2));
} }
static int b_rshift (lua_State *L) { static int b_rshift (lua_State *L) {
return b_shift(L, luaL_checkunsigned(L, 1), -luaL_checkint(L, 2)); return b_shift(L, checkunsigned(L, 1), -luaL_checkinteger(L, 2));
} }
static int b_arshift (lua_State *L) { static int b_arshift (lua_State *L) {
b_uint r = luaL_checkunsigned(L, 1); lua_Unsigned r = checkunsigned(L, 1);
int i = luaL_checkint(L, 2); lua_Integer i = luaL_checkinteger(L, 2);
if (i < 0 || !(r & ((b_uint)1 << (LUA_NBITS - 1)))) if (i < 0 || !(r & ((lua_Unsigned)1 << (LUA_NBITS - 1))))
return b_shift(L, r, -i); return b_shift(L, r, -i);
else { /* arithmetic shift for 'negative' number */ else { /* arithmetic shift for 'negative' number */
if (i >= LUA_NBITS) r = ALLONES; if (i >= LUA_NBITS) r = ALLONES;
else else
r = trim((r >> i) | ~(~(b_uint)0 >> i)); /* add signal bit */ r = trim((r >> i) | ~(trim(~(lua_Unsigned)0) >> i)); /* add signal bit */
lua_pushunsigned(L, r); pushunsigned(L, r);
return 1; return 1;
} }
} }
static int b_rot (lua_State *L, int i) { static int b_rot (lua_State *L, lua_Integer d) {
b_uint r = luaL_checkunsigned(L, 1); lua_Unsigned r = checkunsigned(L, 1);
i &= (LUA_NBITS - 1); /* i = i % NBITS */ int i = d & (LUA_NBITS - 1); /* i = d % NBITS */
r = trim(r); r = trim(r);
if (i != 0) /* avoid undefined shift of LUA_NBITS when i == 0 */ if (i != 0) /* avoid undefined shift of LUA_NBITS when i == 0 */
r = (r << i) | (r >> (LUA_NBITS - i)); r = (r << i) | (r >> (LUA_NBITS - i));
lua_pushunsigned(L, trim(r)); pushunsigned(L, trim(r));
return 1; return 1;
} }
static int b_lrot (lua_State *L) { static int b_lrot (lua_State *L) {
return b_rot(L, luaL_checkint(L, 2)); return b_rot(L, luaL_checkinteger(L, 2));
} }
static int b_rrot (lua_State *L) { static int b_rrot (lua_State *L) {
return b_rot(L, -luaL_checkint(L, 2)); return b_rot(L, -luaL_checkinteger(L, 2));
} }
@ -153,36 +166,35 @@ static int b_rrot (lua_State *L) {
** 'width' being used uninitialized.) ** 'width' being used uninitialized.)
*/ */
static int fieldargs (lua_State *L, int farg, int *width) { static int fieldargs (lua_State *L, int farg, int *width) {
int f = luaL_checkint(L, farg); lua_Integer f = luaL_checkinteger(L, farg);
int w = luaL_optint(L, farg + 1, 1); lua_Integer w = luaL_optinteger(L, farg + 1, 1);
luaL_argcheck(L, 0 <= f, farg, "field cannot be negative"); luaL_argcheck(L, 0 <= f, farg, "field cannot be negative");
luaL_argcheck(L, 0 < w, farg + 1, "width must be positive"); luaL_argcheck(L, 0 < w, farg + 1, "width must be positive");
if (f + w > LUA_NBITS) if (f + w > LUA_NBITS)
luaL_error(L, "trying to access non-existent bits"); luaL_error(L, "trying to access non-existent bits");
*width = w; *width = (int)w;
return f; return (int)f;
} }
static int b_extract (lua_State *L) { static int b_extract (lua_State *L) {
int w; int w;
b_uint r = luaL_checkunsigned(L, 1); lua_Unsigned r = trim(checkunsigned(L, 1));
int f = fieldargs(L, 2, &w); int f = fieldargs(L, 2, &w);
r = (r >> f) & mask(w); r = (r >> f) & mask(w);
lua_pushunsigned(L, r); pushunsigned(L, r);
return 1; return 1;
} }
static int b_replace (lua_State *L) { static int b_replace (lua_State *L) {
int w; int w;
b_uint r = luaL_checkunsigned(L, 1); lua_Unsigned r = trim(checkunsigned(L, 1));
b_uint v = luaL_checkunsigned(L, 2); lua_Unsigned v = trim(checkunsigned(L, 2));
int f = fieldargs(L, 3, &w); int f = fieldargs(L, 3, &w);
int m = mask(w); lua_Unsigned m = mask(w);
v &= m; /* erase bits outside given width */ r = (r & ~(m << f)) | ((v & m) << f);
r = (r & ~(m << f)) | (v << f); pushunsigned(L, r);
lua_pushunsigned(L, r);
return 1; return 1;
} }
@ -210,3 +222,12 @@ LUAMOD_API int luaopen_bit32 (lua_State *L) {
return 1; return 1;
} }
#else /* }{ */
LUAMOD_API int luaopen_bit32 (lua_State *L) {
return luaL_error(L, "library 'bit32' has been deprecated");
}
#endif /* } */

File diff suppressed because it is too large Load Diff

@ -1,15 +1,16 @@
/* /*
** $Id: lcorolib.c,v 1.5.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lcorolib.c,v 1.10 2016/04/11 19:19:55 roberto Exp $
** Coroutine Library ** Coroutine Library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define lcorolib_c
#define LUA_LIB
#include <stdlib.h> #include "lprefix.h"
#define lcorolib_c #include <stdlib.h>
#define LUA_LIB
#include "lua.h" #include "lua.h"
@ -17,6 +18,13 @@
#include "lualib.h" #include "lualib.h"
static lua_State *getco (lua_State *L) {
lua_State *co = lua_tothread(L, 1);
luaL_argcheck(L, co, 1, "thread expected");
return co;
}
static int auxresume (lua_State *L, lua_State *co, int narg) { static int auxresume (lua_State *L, lua_State *co, int narg) {
int status; int status;
if (!lua_checkstack(co, narg)) { if (!lua_checkstack(co, narg)) {
@ -47,9 +55,8 @@ static int auxresume (lua_State *L, lua_State *co, int narg) {
static int luaB_coresume (lua_State *L) { static int luaB_coresume (lua_State *L) {
lua_State *co = lua_tothread(L, 1); lua_State *co = getco(L);
int r; int r;
luaL_argcheck(L, co, 1, "coroutine expected");
r = auxresume(L, co, lua_gettop(L) - 1); r = auxresume(L, co, lua_gettop(L) - 1);
if (r < 0) { if (r < 0) {
lua_pushboolean(L, 0); lua_pushboolean(L, 0);
@ -59,7 +66,7 @@ static int luaB_coresume (lua_State *L) {
else { else {
lua_pushboolean(L, 1); lua_pushboolean(L, 1);
lua_insert(L, -(r + 1)); lua_insert(L, -(r + 1));
return r + 1; /* return true + `resume' returns */ return r + 1; /* return true + 'resume' returns */
} }
} }
@ -68,7 +75,7 @@ static int luaB_auxwrap (lua_State *L) {
lua_State *co = lua_tothread(L, lua_upvalueindex(1)); lua_State *co = lua_tothread(L, lua_upvalueindex(1));
int r = auxresume(L, co, lua_gettop(L)); int r = auxresume(L, co, lua_gettop(L));
if (r < 0) { if (r < 0) {
if (lua_isstring(L, -1)) { /* error object is a string? */ if (lua_type(L, -1) == LUA_TSTRING) { /* error object is a string? */
luaL_where(L, 1); /* add extra info */ luaL_where(L, 1); /* add extra info */
lua_insert(L, -2); lua_insert(L, -2);
lua_concat(L, 2); lua_concat(L, 2);
@ -102,8 +109,7 @@ static int luaB_yield (lua_State *L) {
static int luaB_costatus (lua_State *L) { static int luaB_costatus (lua_State *L) {
lua_State *co = lua_tothread(L, 1); lua_State *co = getco(L);
luaL_argcheck(L, co, 1, "coroutine expected");
if (L == co) lua_pushliteral(L, "running"); if (L == co) lua_pushliteral(L, "running");
else { else {
switch (lua_status(co)) { switch (lua_status(co)) {
@ -129,6 +135,12 @@ static int luaB_costatus (lua_State *L) {
} }
static int luaB_yieldable (lua_State *L) {
lua_pushboolean(L, lua_isyieldable(L));
return 1;
}
static int luaB_corunning (lua_State *L) { static int luaB_corunning (lua_State *L) {
int ismain = lua_pushthread(L); int ismain = lua_pushthread(L);
lua_pushboolean(L, ismain); lua_pushboolean(L, ismain);
@ -143,6 +155,7 @@ static const luaL_Reg co_funcs[] = {
{"status", luaB_costatus}, {"status", luaB_costatus},
{"wrap", luaB_cowrap}, {"wrap", luaB_cowrap},
{"yield", luaB_yield}, {"yield", luaB_yield},
{"isyieldable", luaB_yieldable},
{NULL, NULL} {NULL, NULL}
}; };

@ -1,5 +1,5 @@
/* /*
** $Id: lctype.c,v 1.11.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lctype.c,v 1.12 2014/11/02 19:19:04 roberto Exp $
** 'ctype' functions for Lua ** 'ctype' functions for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -7,6 +7,9 @@
#define lctype_c #define lctype_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include "lctype.h" #include "lctype.h"
#if !LUA_USE_CTYPE /* { */ #if !LUA_USE_CTYPE /* { */

@ -1,26 +1,42 @@
/* /*
** $Id: ldblib.c,v 1.132.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: ldblib.c,v 1.151 2015/11/23 11:29:43 roberto Exp $
** Interface from Lua to its debug API ** Interface from Lua to its debug API
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define ldblib_c
#define LUA_LIB
#include "lprefix.h"
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define ldblib_c
#define LUA_LIB
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
#include "lualib.h" #include "lualib.h"
#define HOOKKEY "_HKEY" /*
** The hook table at registry[&HOOKKEY] maps threads to their current
** hook function. (We only need the unique address of 'HOOKKEY'.)
*/
static const int HOOKKEY = 0;
/*
** If L1 != L, L1 can be in any state, and therefore there are no
** guarantees about its stack space; any push in L1 must be
** checked.
*/
static void checkstack (lua_State *L, lua_State *L1, int n) {
if (L != L1 && !lua_checkstack(L1, n))
luaL_error(L, "stack overflow");
}
static int db_getregistry (lua_State *L) { static int db_getregistry (lua_State *L) {
lua_pushvalue(L, LUA_REGISTRYINDEX); lua_pushvalue(L, LUA_REGISTRYINDEX);
@ -57,35 +73,20 @@ static int db_getuservalue (lua_State *L) {
static int db_setuservalue (lua_State *L) { static int db_setuservalue (lua_State *L) {
if (lua_type(L, 1) == LUA_TLIGHTUSERDATA)
luaL_argerror(L, 1, "full userdata expected, got light userdata");
luaL_checktype(L, 1, LUA_TUSERDATA); luaL_checktype(L, 1, LUA_TUSERDATA);
if (!lua_isnoneornil(L, 2)) luaL_checkany(L, 2);
luaL_checktype(L, 2, LUA_TTABLE);
lua_settop(L, 2); lua_settop(L, 2);
lua_setuservalue(L, 1); lua_setuservalue(L, 1);
return 1; return 1;
} }
static void settabss (lua_State *L, const char *i, const char *v) { /*
lua_pushstring(L, v); ** Auxiliary function used by several library functions: check for
lua_setfield(L, -2, i); ** an optional thread as function's first argument and set 'arg' with
} ** 1 if this argument is present (so that functions can skip it to
** access their other arguments)
*/
static void settabsi (lua_State *L, const char *i, int v) {
lua_pushinteger(L, v);
lua_setfield(L, -2, i);
}
static void settabsb (lua_State *L, const char *i, int v) {
lua_pushboolean(L, v);
lua_setfield(L, -2, i);
}
static lua_State *getthread (lua_State *L, int *arg) { static lua_State *getthread (lua_State *L, int *arg) {
if (lua_isthread(L, 1)) { if (lua_isthread(L, 1)) {
*arg = 1; *arg = 1;
@ -93,44 +94,74 @@ static lua_State *getthread (lua_State *L, int *arg) {
} }
else { else {
*arg = 0; *arg = 0;
return L; return L; /* function will operate over current thread */
} }
} }
/*
** Variations of 'lua_settable', used by 'db_getinfo' to put results
** from 'lua_getinfo' into result table. Key is always a string;
** value can be a string, an int, or a boolean.
*/
static void settabss (lua_State *L, const char *k, const char *v) {
lua_pushstring(L, v);
lua_setfield(L, -2, k);
}
static void settabsi (lua_State *L, const char *k, int v) {
lua_pushinteger(L, v);
lua_setfield(L, -2, k);
}
static void settabsb (lua_State *L, const char *k, int v) {
lua_pushboolean(L, v);
lua_setfield(L, -2, k);
}
/*
** In function 'db_getinfo', the call to 'lua_getinfo' may push
** results on the stack; later it creates the result table to put
** these objects. Function 'treatstackoption' puts the result from
** 'lua_getinfo' on top of the result table so that it can call
** 'lua_setfield'.
*/
static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) { static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {
if (L == L1) { if (L == L1)
lua_pushvalue(L, -2); lua_rotate(L, -2, 1); /* exchange object and table */
lua_remove(L, -3);
}
else else
lua_xmove(L1, L, 1); lua_xmove(L1, L, 1); /* move object to the "main" stack */
lua_setfield(L, -2, fname); lua_setfield(L, -2, fname); /* put object into table */
} }
/*
** Calls 'lua_getinfo' and collects all results in a new table.
** L1 needs stack space for an optional input (function) plus
** two optional outputs (function and line table) from function
** 'lua_getinfo'.
*/
static int db_getinfo (lua_State *L) { static int db_getinfo (lua_State *L) {
lua_Debug ar; lua_Debug ar;
int arg; int arg;
lua_State *L1 = getthread(L, &arg); lua_State *L1 = getthread(L, &arg);
const char *options = luaL_optstring(L, arg+2, "flnStu"); const char *options = luaL_optstring(L, arg+2, "flnStu");
if (lua_isnumber(L, arg+1)) { checkstack(L, L1, 3);
if (!lua_getstack(L1, (int)lua_tointeger(L, arg+1), &ar)) { if (lua_isfunction(L, arg + 1)) { /* info about a function? */
options = lua_pushfstring(L, ">%s", options); /* add '>' to 'options' */
lua_pushvalue(L, arg + 1); /* move function to 'L1' stack */
lua_xmove(L, L1, 1);
}
else { /* stack level */
if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) {
lua_pushnil(L); /* level out of range */ lua_pushnil(L); /* level out of range */
return 1; return 1;
} }
} }
else if (lua_isfunction(L, arg+1)) {
lua_pushfstring(L, ">%s", options);
options = lua_tostring(L, -1);
lua_pushvalue(L, arg+1);
lua_xmove(L, L1, 1);
}
else
return luaL_argerror(L, arg+1, "function or level expected");
if (!lua_getinfo(L1, options, &ar)) if (!lua_getinfo(L1, options, &ar))
return luaL_argerror(L, arg+2, "invalid option"); return luaL_argerror(L, arg+2, "invalid option");
lua_createtable(L, 0, 2); lua_newtable(L); /* table to collect results */
if (strchr(options, 'S')) { if (strchr(options, 'S')) {
settabss(L, "source", ar.source); settabss(L, "source", ar.source);
settabss(L, "short_src", ar.short_src); settabss(L, "short_src", ar.short_src);
@ -164,20 +195,22 @@ static int db_getlocal (lua_State *L) {
lua_State *L1 = getthread(L, &arg); lua_State *L1 = getthread(L, &arg);
lua_Debug ar; lua_Debug ar;
const char *name; const char *name;
int nvar = luaL_checkint(L, arg+2); /* local-variable index */ int nvar = (int)luaL_checkinteger(L, arg + 2); /* local-variable index */
if (lua_isfunction(L, arg + 1)) { /* function argument? */ if (lua_isfunction(L, arg + 1)) { /* function argument? */
lua_pushvalue(L, arg + 1); /* push function */ lua_pushvalue(L, arg + 1); /* push function */
lua_pushstring(L, lua_getlocal(L, NULL, nvar)); /* push local name */ lua_pushstring(L, lua_getlocal(L, NULL, nvar)); /* push local name */
return 1; return 1; /* return only name (there is no value) */
} }
else { /* stack-level argument */ else { /* stack-level argument */
if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */ int level = (int)luaL_checkinteger(L, arg + 1);
if (!lua_getstack(L1, level, &ar)) /* out of range? */
return luaL_argerror(L, arg+1, "level out of range"); return luaL_argerror(L, arg+1, "level out of range");
checkstack(L, L1, 1);
name = lua_getlocal(L1, &ar, nvar); name = lua_getlocal(L1, &ar, nvar);
if (name) { if (name) {
lua_xmove(L1, L, 1); /* push local value */ lua_xmove(L1, L, 1); /* move local value */
lua_pushstring(L, name); /* push name */ lua_pushstring(L, name); /* push name */
lua_pushvalue(L, -2); /* re-order */ lua_rotate(L, -2, 1); /* re-order */
return 2; return 2;
} }
else { else {
@ -190,26 +223,36 @@ static int db_getlocal (lua_State *L) {
static int db_setlocal (lua_State *L) { static int db_setlocal (lua_State *L) {
int arg; int arg;
const char *name;
lua_State *L1 = getthread(L, &arg); lua_State *L1 = getthread(L, &arg);
lua_Debug ar; lua_Debug ar;
if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */ int level = (int)luaL_checkinteger(L, arg + 1);
int nvar = (int)luaL_checkinteger(L, arg + 2);
if (!lua_getstack(L1, level, &ar)) /* out of range? */
return luaL_argerror(L, arg+1, "level out of range"); return luaL_argerror(L, arg+1, "level out of range");
luaL_checkany(L, arg+3); luaL_checkany(L, arg+3);
lua_settop(L, arg+3); lua_settop(L, arg+3);
checkstack(L, L1, 1);
lua_xmove(L, L1, 1); lua_xmove(L, L1, 1);
lua_pushstring(L, lua_setlocal(L1, &ar, luaL_checkint(L, arg+2))); name = lua_setlocal(L1, &ar, nvar);
if (name == NULL)
lua_pop(L1, 1); /* pop value (if not popped by 'lua_setlocal') */
lua_pushstring(L, name);
return 1; return 1;
} }
/*
** get (if 'get' is true) or set an upvalue from a closure
*/
static int auxupvalue (lua_State *L, int get) { static int auxupvalue (lua_State *L, int get) {
const char *name; const char *name;
int n = luaL_checkint(L, 2); int n = (int)luaL_checkinteger(L, 2); /* upvalue index */
luaL_checktype(L, 1, LUA_TFUNCTION); luaL_checktype(L, 1, LUA_TFUNCTION); /* closure */
name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n); name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
if (name == NULL) return 0; if (name == NULL) return 0;
lua_pushstring(L, name); lua_pushstring(L, name);
lua_insert(L, -(get+1)); lua_insert(L, -(get+1)); /* no-op if get is false */
return get + 1; return get + 1;
} }
@ -225,13 +268,15 @@ static int db_setupvalue (lua_State *L) {
} }
/*
** Check whether a given upvalue from a given closure exists and
** returns its index
*/
static int checkupval (lua_State *L, int argf, int argnup) { static int checkupval (lua_State *L, int argf, int argnup) {
lua_Debug ar; int nup = (int)luaL_checkinteger(L, argnup); /* upvalue index */
int nup = luaL_checkint(L, argnup); luaL_checktype(L, argf, LUA_TFUNCTION); /* closure */
luaL_checktype(L, argf, LUA_TFUNCTION); luaL_argcheck(L, (lua_getupvalue(L, argf, nup) != NULL), argnup,
lua_pushvalue(L, argf); "invalid upvalue index");
lua_getinfo(L, ">u", &ar);
luaL_argcheck(L, 1 <= nup && nup <= ar.nups, argnup, "invalid upvalue index");
return nup; return nup;
} }
@ -253,26 +298,29 @@ static int db_upvaluejoin (lua_State *L) {
} }
#define gethooktable(L) luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY) /*
** Call hook function registered at hook table for the current
** thread (if there is one)
*/
static void hookf (lua_State *L, lua_Debug *ar) { static void hookf (lua_State *L, lua_Debug *ar) {
static const char *const hooknames[] = static const char *const hooknames[] =
{"call", "return", "line", "count", "tail call"}; {"call", "return", "line", "count", "tail call"};
gethooktable(L); lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY);
lua_pushthread(L); lua_pushthread(L);
lua_rawget(L, -2); if (lua_rawget(L, -2) == LUA_TFUNCTION) { /* is there a hook function? */
if (lua_isfunction(L, -1)) { lua_pushstring(L, hooknames[(int)ar->event]); /* push event name */
lua_pushstring(L, hooknames[(int)ar->event]);
if (ar->currentline >= 0) if (ar->currentline >= 0)
lua_pushinteger(L, ar->currentline); lua_pushinteger(L, ar->currentline); /* push current line */
else lua_pushnil(L); else lua_pushnil(L);
lua_assert(lua_getinfo(L, "lS", ar)); lua_assert(lua_getinfo(L, "lS", ar));
lua_call(L, 2, 0); lua_call(L, 2, 0); /* call hook function */
} }
} }
/*
** Convert a string mask (for 'sethook') into a bit mask
*/
static int makemask (const char *smask, int count) { static int makemask (const char *smask, int count) {
int mask = 0; int mask = 0;
if (strchr(smask, 'c')) mask |= LUA_MASKCALL; if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
@ -283,6 +331,9 @@ static int makemask (const char *smask, int count) {
} }
/*
** Convert a bit mask (for 'gethook') into a string mask
*/
static char *unmakemask (int mask, char *smask) { static char *unmakemask (int mask, char *smask) {
int i = 0; int i = 0;
if (mask & LUA_MASKCALL) smask[i++] = 'c'; if (mask & LUA_MASKCALL) smask[i++] = 'c';
@ -297,26 +348,30 @@ static int db_sethook (lua_State *L) {
int arg, mask, count; int arg, mask, count;
lua_Hook func; lua_Hook func;
lua_State *L1 = getthread(L, &arg); lua_State *L1 = getthread(L, &arg);
if (lua_isnoneornil(L, arg+1)) { if (lua_isnoneornil(L, arg+1)) { /* no hook? */
lua_settop(L, arg+1); lua_settop(L, arg+1);
func = NULL; mask = 0; count = 0; /* turn off hooks */ func = NULL; mask = 0; count = 0; /* turn off hooks */
} }
else { else {
const char *smask = luaL_checkstring(L, arg+2); const char *smask = luaL_checkstring(L, arg+2);
luaL_checktype(L, arg+1, LUA_TFUNCTION); luaL_checktype(L, arg+1, LUA_TFUNCTION);
count = luaL_optint(L, arg+3, 0); count = (int)luaL_optinteger(L, arg + 3, 0);
func = hookf; mask = makemask(smask, count); func = hookf; mask = makemask(smask, count);
} }
if (gethooktable(L) == 0) { /* creating hook table? */ if (lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY) == LUA_TNIL) {
lua_createtable(L, 0, 2); /* create a hook table */
lua_pushvalue(L, -1);
lua_rawsetp(L, LUA_REGISTRYINDEX, &HOOKKEY); /* set it in position */
lua_pushstring(L, "k"); lua_pushstring(L, "k");
lua_setfield(L, -2, "__mode"); /** hooktable.__mode = "k" */ lua_setfield(L, -2, "__mode"); /** hooktable.__mode = "k" */
lua_pushvalue(L, -1); lua_pushvalue(L, -1);
lua_setmetatable(L, -2); /* setmetatable(hooktable) = hooktable */ lua_setmetatable(L, -2); /* setmetatable(hooktable) = hooktable */
} }
lua_pushthread(L1); lua_xmove(L1, L, 1); checkstack(L, L1, 1);
lua_pushvalue(L, arg+1); lua_pushthread(L1); lua_xmove(L1, L, 1); /* key (thread) */
lua_rawset(L, -3); /* set new hook */ lua_pushvalue(L, arg + 1); /* value (hook function) */
lua_sethook(L1, func, mask, count); /* set hooks */ lua_rawset(L, -3); /* hooktable[L1] = new Lua hook */
lua_sethook(L1, func, mask, count);
return 0; return 0;
} }
@ -327,16 +382,19 @@ static int db_gethook (lua_State *L) {
char buff[5]; char buff[5];
int mask = lua_gethookmask(L1); int mask = lua_gethookmask(L1);
lua_Hook hook = lua_gethook(L1); lua_Hook hook = lua_gethook(L1);
if (hook != NULL && hook != hookf) /* external hook? */ if (hook == NULL) /* no hook? */
lua_pushnil(L);
else if (hook != hookf) /* external hook? */
lua_pushliteral(L, "external hook"); lua_pushliteral(L, "external hook");
else { else { /* hook table must exist */
gethooktable(L); lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY);
checkstack(L, L1, 1);
lua_pushthread(L1); lua_xmove(L1, L, 1); lua_pushthread(L1); lua_xmove(L1, L, 1);
lua_rawget(L, -2); /* get hook */ lua_rawget(L, -2); /* 1st result = hooktable[L1] */
lua_remove(L, -2); /* remove hook table */ lua_remove(L, -2); /* remove hook table */
} }
lua_pushstring(L, unmakemask(mask, buff)); lua_pushstring(L, unmakemask(mask, buff)); /* 2nd result = mask */
lua_pushinteger(L, lua_gethookcount(L1)); lua_pushinteger(L, lua_gethookcount(L1)); /* 3rd result = count */
return 3; return 3;
} }
@ -344,13 +402,13 @@ static int db_gethook (lua_State *L) {
static int db_debug (lua_State *L) { static int db_debug (lua_State *L) {
for (;;) { for (;;) {
char buffer[250]; char buffer[250];
luai_writestringerror("%s", "lua_debug> "); lua_writestringerror("%s", "lua_debug> ");
if (fgets(buffer, sizeof(buffer), stdin) == 0 || if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
strcmp(buffer, "cont\n") == 0) strcmp(buffer, "cont\n") == 0)
return 0; return 0;
if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") || if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") ||
lua_pcall(L, 0, 0, 0)) lua_pcall(L, 0, 0, 0))
luai_writestringerror("%s\n", lua_tostring(L, -1)); lua_writestringerror("%s\n", lua_tostring(L, -1));
lua_settop(L, 0); /* remove eventual returns */ lua_settop(L, 0); /* remove eventual returns */
} }
} }
@ -363,7 +421,7 @@ static int db_traceback (lua_State *L) {
if (msg == NULL && !lua_isnoneornil(L, arg + 1)) /* non-string 'msg'? */ if (msg == NULL && !lua_isnoneornil(L, arg + 1)) /* non-string 'msg'? */
lua_pushvalue(L, arg + 1); /* return it untouched */ lua_pushvalue(L, arg + 1); /* return it untouched */
else { else {
int level = luaL_optint(L, arg + 2, (L == L1) ? 1 : 0); int level = (int)luaL_optinteger(L, arg + 2, (L == L1) ? 1 : 0);
luaL_traceback(L, L1, msg, level); luaL_traceback(L, L1, msg, level);
} }
return 1; return 1;

@ -1,18 +1,19 @@
/* /*
** $Id: ldebug.c,v 2.90.1.3 2013/05/16 16:04:15 roberto Exp $ ** $Id: ldebug.c,v 2.120 2016/03/31 19:01:21 roberto Exp $
** Debug Interface ** Debug Interface
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define ldebug_c
#define LUA_CORE
#include "lprefix.h"
#include <stdarg.h> #include <stdarg.h>
#include <stddef.h> #include <stddef.h>
#include <string.h> #include <string.h>
#define ldebug_c
#define LUA_CORE
#include "lua.h" #include "lua.h"
#include "lapi.h" #include "lapi.h"
@ -33,6 +34,10 @@
#define noLuaClosure(f) ((f) == NULL || (f)->c.tt == LUA_TCCL) #define noLuaClosure(f) ((f) == NULL || (f)->c.tt == LUA_TCCL)
/* Active Lua function (given call info) */
#define ci_func(ci) (clLvalue((ci)->func))
static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name); static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
@ -48,9 +53,31 @@ static int currentline (CallInfo *ci) {
/* /*
** this function can be called asynchronous (e.g. during a signal) ** If function yielded, its 'func' can be in the 'extra' field. The
** next function restores 'func' to its correct value for debugging
** purposes. (It exchanges 'func' and 'extra'; so, when called again,
** after debugging, it also "re-restores" ** 'func' to its altered value.
*/
static void swapextra (lua_State *L) {
if (L->status == LUA_YIELD) {
CallInfo *ci = L->ci; /* get function that yielded */
StkId temp = ci->func; /* exchange its 'func' and 'extra' values */
ci->func = restorestack(L, ci->extra);
ci->extra = savestack(L, temp);
}
}
/*
** This function can be called asynchronously (e.g. during a signal).
** Fields 'oldpc', 'basehookcount', and 'hookcount' (set by
** 'resethookcount') are for debug only, and it is no problem if they
** get arbitrary values (causes at most one wrong hook call). 'hookmask'
** is an atomic value. We assume that pointers are atomic too (e.g., gcc
** ensures that for all platforms where it runs). Moreover, 'hook' is
** always checked before being called (see 'luaD_hook').
*/ */
LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) { LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
if (func == NULL || mask == 0) { /* turn off hooks? */ if (func == NULL || mask == 0) { /* turn off hooks? */
mask = 0; mask = 0;
func = NULL; func = NULL;
@ -61,7 +88,6 @@ LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
L->basehookcount = count; L->basehookcount = count;
resethookcount(L); resethookcount(L);
L->hookmask = cast_byte(mask); L->hookmask = cast_byte(mask);
return 1;
} }
@ -106,7 +132,7 @@ static const char *upvalname (Proto *p, int uv) {
static const char *findvararg (CallInfo *ci, int n, StkId *pos) { static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
int nparams = clLvalue(ci->func)->p->numparams; int nparams = clLvalue(ci->func)->p->numparams;
if (n >= ci->u.l.base - ci->func - nparams) if (n >= cast_int(ci->u.l.base - ci->func) - nparams)
return NULL; /* no such vararg */ return NULL; /* no such vararg */
else { else {
*pos = ci->func + nparams + n; *pos = ci->func + nparams + n;
@ -144,6 +170,7 @@ static const char *findlocal (lua_State *L, CallInfo *ci, int n,
LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) { LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
const char *name; const char *name;
lua_lock(L); lua_lock(L);
swapextra(L);
if (ar == NULL) { /* information about non-active function? */ if (ar == NULL) { /* information about non-active function? */
if (!isLfunction(L->top - 1)) /* not a Lua function? */ if (!isLfunction(L->top - 1)) /* not a Lua function? */
name = NULL; name = NULL;
@ -151,25 +178,30 @@ LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0); name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);
} }
else { /* active function; get information through 'ar' */ else { /* active function; get information through 'ar' */
StkId pos = 0; /* to avoid warnings */ StkId pos = NULL; /* to avoid warnings */
name = findlocal(L, ar->i_ci, n, &pos); name = findlocal(L, ar->i_ci, n, &pos);
if (name) { if (name) {
setobj2s(L, L->top, pos); setobj2s(L, L->top, pos);
api_incr_top(L); api_incr_top(L);
} }
} }
swapextra(L);
lua_unlock(L); lua_unlock(L);
return name; return name;
} }
LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) { LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
StkId pos = 0; /* to avoid warnings */ StkId pos = NULL; /* to avoid warnings */
const char *name = findlocal(L, ar->i_ci, n, &pos); const char *name;
lua_lock(L); lua_lock(L);
if (name) swapextra(L);
name = findlocal(L, ar->i_ci, n, &pos);
if (name) {
setobjs2s(L, pos, L->top - 1); setobjs2s(L, pos, L->top - 1);
L->top--; /* pop value */ L->top--; /* pop value */
}
swapextra(L);
lua_unlock(L); lua_unlock(L);
return name; return name;
} }
@ -269,6 +301,7 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
CallInfo *ci; CallInfo *ci;
StkId func; StkId func;
lua_lock(L); lua_lock(L);
swapextra(L);
if (*what == '>') { if (*what == '>') {
ci = NULL; ci = NULL;
func = L->top - 1; func = L->top - 1;
@ -287,6 +320,7 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
setobjs2s(L, L->top, func); setobjs2s(L, L->top, func);
api_incr_top(L); api_incr_top(L);
} }
swapextra(L); /* correct before option 'L', which can raise a mem. error */
if (strchr(what, 'L')) if (strchr(what, 'L'))
collectvalidlines(L, cl); collectvalidlines(L, cl);
lua_unlock(L); lua_unlock(L);
@ -366,18 +400,13 @@ static int findsetreg (Proto *p, int lastpc, int reg) {
case OP_JMP: { case OP_JMP: {
int b = GETARG_sBx(i); int b = GETARG_sBx(i);
int dest = pc + 1 + b; int dest = pc + 1 + b;
/* jump is forward and do not skip `lastpc'? */ /* jump is forward and do not skip 'lastpc'? */
if (pc < dest && dest <= lastpc) { if (pc < dest && dest <= lastpc) {
if (dest > jmptarget) if (dest > jmptarget)
jmptarget = dest; /* update 'jmptarget' */ jmptarget = dest; /* update 'jmptarget' */
} }
break; break;
} }
case OP_TEST: {
if (reg == a) /* jumped code can change 'a' */
setreg = filterpc(pc, jmptarget);
break;
}
default: default:
if (testAMode(op) && reg == a) /* any instruction that set A */ if (testAMode(op) && reg == a) /* any instruction that set A */
setreg = filterpc(pc, jmptarget); setreg = filterpc(pc, jmptarget);
@ -443,10 +472,14 @@ static const char *getobjname (Proto *p, int lastpc, int reg,
static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) { static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
TMS tm; TMS tm = (TMS)0; /* to avoid warnings */
Proto *p = ci_func(ci)->p; /* calling function */ Proto *p = ci_func(ci)->p; /* calling function */
int pc = currentpc(ci); /* calling instruction index */ int pc = currentpc(ci); /* calling instruction index */
Instruction i = p->code[pc]; /* calling instruction */ Instruction i = p->code[pc]; /* calling instruction */
if (ci->callstatus & CIST_HOOKED) { /* was it called inside a hook? */
*name = "?";
return "hook";
}
switch (GET_OPCODE(i)) { switch (GET_OPCODE(i)) {
case OP_CALL: case OP_CALL:
case OP_TAILCALL: /* get function name */ case OP_TAILCALL: /* get function name */
@ -456,25 +489,27 @@ static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
return "for iterator"; return "for iterator";
} }
/* all other instructions can call only through metamethods */ /* all other instructions can call only through metamethods */
case OP_SELF: case OP_SELF: case OP_GETTABUP: case OP_GETTABLE:
case OP_GETTABUP: tm = TM_INDEX;
case OP_GETTABLE: tm = TM_INDEX; break; break;
case OP_SETTABUP: case OP_SETTABUP: case OP_SETTABLE:
case OP_SETTABLE: tm = TM_NEWINDEX; break; tm = TM_NEWINDEX;
case OP_EQ: tm = TM_EQ; break; break;
case OP_ADD: tm = TM_ADD; break; case OP_ADD: case OP_SUB: case OP_MUL: case OP_MOD:
case OP_SUB: tm = TM_SUB; break; case OP_POW: case OP_DIV: case OP_IDIV: case OP_BAND:
case OP_MUL: tm = TM_MUL; break; case OP_BOR: case OP_BXOR: case OP_SHL: case OP_SHR: {
case OP_DIV: tm = TM_DIV; break; int offset = cast_int(GET_OPCODE(i)) - cast_int(OP_ADD); /* ORDER OP */
case OP_MOD: tm = TM_MOD; break; tm = cast(TMS, offset + cast_int(TM_ADD)); /* ORDER TM */
case OP_POW: tm = TM_POW; break; break;
}
case OP_UNM: tm = TM_UNM; break; case OP_UNM: tm = TM_UNM; break;
case OP_BNOT: tm = TM_BNOT; break;
case OP_LEN: tm = TM_LEN; break; case OP_LEN: tm = TM_LEN; break;
case OP_CONCAT: tm = TM_CONCAT; break;
case OP_EQ: tm = TM_EQ; break;
case OP_LT: tm = TM_LT; break; case OP_LT: tm = TM_LT; break;
case OP_LE: tm = TM_LE; break; case OP_LE: tm = TM_LE; break;
case OP_CONCAT: tm = TM_CONCAT; break; default: lua_assert(0); /* other instructions cannot call a function */
default:
return NULL; /* else no useful name can be found */
} }
*name = getstr(G(L)->tmname[tm]); *name = getstr(G(L)->tmname[tm]);
return "metamethod"; return "metamethod";
@ -485,17 +520,21 @@ static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
/* /*
** only ANSI way to check whether a pointer points to an array ** The subtraction of two potentially unrelated pointers is
** (used only for error messages, so efficiency is not a big concern) ** not ISO C, but it should not crash a program; the subsequent
** checks are ISO C and ensure a correct result.
*/ */
static int isinstack (CallInfo *ci, const TValue *o) { static int isinstack (CallInfo *ci, const TValue *o) {
StkId p; ptrdiff_t i = o - ci->u.l.base;
for (p = ci->u.l.base; p < ci->top; p++) return (0 <= i && i < (ci->top - ci->u.l.base) && ci->u.l.base + i == o);
if (o == p) return 1;
return 0;
} }
/*
** Checks whether value 'o' came from an upvalue. (That can only happen
** with instructions OP_GETTABUP/OP_SETTABUP, which operate directly on
** upvalues.)
*/
static const char *getupvalname (CallInfo *ci, const TValue *o, static const char *getupvalname (CallInfo *ci, const TValue *o,
const char **name) { const char **name) {
LClosure *c = ci_func(ci); LClosure *c = ci_func(ci);
@ -510,10 +549,9 @@ static const char *getupvalname (CallInfo *ci, const TValue *o,
} }
l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) { static const char *varinfo (lua_State *L, const TValue *o) {
const char *name = NULL; /* to avoid warnings */
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
const char *name = NULL;
const char *t = objtypename(o);
const char *kind = NULL; const char *kind = NULL;
if (isLua(ci)) { if (isLua(ci)) {
kind = getupvalname(ci, o, &name); /* check whether 'o' is an upvalue */ kind = getupvalname(ci, o, &name); /* check whether 'o' is an upvalue */
@ -521,73 +559,121 @@ l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
kind = getobjname(ci_func(ci)->p, currentpc(ci), kind = getobjname(ci_func(ci)->p, currentpc(ci),
cast_int(o - ci->u.l.base), &name); cast_int(o - ci->u.l.base), &name);
} }
if (kind) return (kind) ? luaO_pushfstring(L, " (%s '%s')", kind, name) : "";
luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
op, kind, name, t);
else
luaG_runerror(L, "attempt to %s a %s value", op, t);
} }
l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2) { l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
if (ttisstring(p1) || ttisnumber(p1)) p1 = p2; const char *t = luaT_objtypename(L, o);
lua_assert(!ttisstring(p1) && !ttisnumber(p1)); luaG_runerror(L, "attempt to %s a %s value%s", op, t, varinfo(L, o));
}
l_noret luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2) {
if (ttisstring(p1) || cvt2str(p1)) p1 = p2;
luaG_typeerror(L, p1, "concatenate"); luaG_typeerror(L, p1, "concatenate");
} }
l_noret luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) { l_noret luaG_opinterror (lua_State *L, const TValue *p1,
TValue temp; const TValue *p2, const char *msg) {
if (luaV_tonumber(p1, &temp) == NULL) lua_Number temp;
p2 = p1; /* first operand is wrong */ if (!tonumber(p1, &temp)) /* first operand is wrong? */
luaG_typeerror(L, p2, "perform arithmetic on"); p2 = p1; /* now second is wrong */
luaG_typeerror(L, p2, msg);
}
/*
** Error when both values are convertible to numbers, but not to integers
*/
l_noret luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2) {
lua_Integer temp;
if (!tointeger(p1, &temp))
p2 = p1;
luaG_runerror(L, "number%s has no integer representation", varinfo(L, p2));
} }
l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) { l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
const char *t1 = objtypename(p1); const char *t1 = luaT_objtypename(L, p1);
const char *t2 = objtypename(p2); const char *t2 = luaT_objtypename(L, p2);
if (t1 == t2) if (strcmp(t1, t2) == 0)
luaG_runerror(L, "attempt to compare two %s values", t1); luaG_runerror(L, "attempt to compare two %s values", t1);
else else
luaG_runerror(L, "attempt to compare %s with %s", t1, t2); luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
} }
static void addinfo (lua_State *L, const char *msg) { /* add src:line information to 'msg' */
CallInfo *ci = L->ci; const char *luaG_addinfo (lua_State *L, const char *msg, TString *src,
if (isLua(ci)) { /* is Lua code? */ int line) {
char buff[LUA_IDSIZE]; /* add file:line information */ char buff[LUA_IDSIZE];
int line = currentline(ci); if (src)
TString *src = ci_func(ci)->p->source; luaO_chunkid(buff, getstr(src), LUA_IDSIZE);
if (src) else { /* no source available; use "?" instead */
luaO_chunkid(buff, getstr(src), LUA_IDSIZE); buff[0] = '?'; buff[1] = '\0';
else { /* no source available; use "?" instead */
buff[0] = '?'; buff[1] = '\0';
}
luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
} }
return luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
} }
l_noret luaG_errormsg (lua_State *L) { l_noret luaG_errormsg (lua_State *L) {
if (L->errfunc != 0) { /* is there an error handling function? */ if (L->errfunc != 0) { /* is there an error handling function? */
StkId errfunc = restorestack(L, L->errfunc); StkId errfunc = restorestack(L, L->errfunc);
if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
setobjs2s(L, L->top, L->top - 1); /* move argument */ setobjs2s(L, L->top, L->top - 1); /* move argument */
setobjs2s(L, L->top - 1, errfunc); /* push function */ setobjs2s(L, L->top - 1, errfunc); /* push function */
L->top++; L->top++; /* assume EXTRA_STACK */
luaD_call(L, L->top - 2, 1, 0); /* call it */ luaD_callnoyield(L, L->top - 2, 1); /* call it */
} }
luaD_throw(L, LUA_ERRRUN); luaD_throw(L, LUA_ERRRUN);
} }
l_noret luaG_runerror (lua_State *L, const char *fmt, ...) { l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
CallInfo *ci = L->ci;
const char *msg;
va_list argp; va_list argp;
va_start(argp, fmt); va_start(argp, fmt);
addinfo(L, luaO_pushvfstring(L, fmt, argp)); msg = luaO_pushvfstring(L, fmt, argp); /* format message */
va_end(argp); va_end(argp);
if (isLua(ci)) /* if Lua function, add source:line information */
luaG_addinfo(L, msg, ci_func(ci)->p->source, currentline(ci));
luaG_errormsg(L); luaG_errormsg(L);
} }
void luaG_traceexec (lua_State *L) {
CallInfo *ci = L->ci;
lu_byte mask = L->hookmask;
int counthook = (--L->hookcount == 0 && (mask & LUA_MASKCOUNT));
if (counthook)
resethookcount(L); /* reset count */
else if (!(mask & LUA_MASKLINE))
return; /* no line hook and count != 0; nothing to be done */
if (ci->callstatus & CIST_HOOKYIELD) { /* called hook last time? */
ci->callstatus &= ~CIST_HOOKYIELD; /* erase mark */
return; /* do not call hook again (VM yielded, so it did not move) */
}
if (counthook)
luaD_hook(L, LUA_HOOKCOUNT, -1); /* call count hook */
if (mask & LUA_MASKLINE) {
Proto *p = ci_func(ci)->p;
int npc = pcRel(ci->u.l.savedpc, p);
int newline = getfuncline(p, npc);
if (npc == 0 || /* call linehook when enter a new function, */
ci->u.l.savedpc <= L->oldpc || /* when jump back (loop), or when */
newline != getfuncline(p, pcRel(L->oldpc, p))) /* enter a new line */
luaD_hook(L, LUA_HOOKLINE, newline); /* call line hook */
}
L->oldpc = ci->u.l.savedpc;
if (L->status == LUA_YIELD) { /* did hook yield? */
if (counthook)
L->hookcount = 1; /* undo decrement to zero */
ci->u.l.savedpc--; /* undo increment (resume will increment it again) */
ci->callstatus |= CIST_HOOKYIELD; /* mark that it yielded */
ci->func = L->top - 1; /* protect stack below results */
luaD_throw(L, LUA_YIELD);
}
}

@ -1,17 +1,19 @@
/* /*
** $Id: ldo.c,v 2.108.1.3 2013/11/08 18:22:50 roberto Exp $ ** $Id: ldo.c,v 2.151 2015/12/16 16:40:07 roberto Exp $
** Stack and Call structure of Lua ** Stack and Call structure of Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define ldo_c
#define LUA_CORE
#include "lprefix.h"
#include <setjmp.h> #include <setjmp.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define ldo_c
#define LUA_CORE
#include "lua.h" #include "lua.h"
#include "lapi.h" #include "lapi.h"
@ -33,6 +35,8 @@
#define errorstatus(s) ((s) > LUA_YIELD)
/* /*
** {====================================================== ** {======================================================
@ -46,30 +50,33 @@
** C++ code, with _longjmp/_setjmp when asked to use them, and with ** C++ code, with _longjmp/_setjmp when asked to use them, and with
** longjmp/setjmp otherwise. ** longjmp/setjmp otherwise.
*/ */
#if !defined(LUAI_THROW) #if !defined(LUAI_THROW) /* { */
#if defined(__cplusplus) && !defined(LUA_USE_LONGJMP) /* { */
#if defined(__cplusplus) && !defined(LUA_USE_LONGJMP)
/* C++ exceptions */ /* C++ exceptions */
#define LUAI_THROW(L,c) throw(c) #define LUAI_THROW(L,c) throw(c)
#define LUAI_TRY(L,c,a) \ #define LUAI_TRY(L,c,a) \
try { a } catch(...) { if ((c)->status == 0) (c)->status = -1; } try { a } catch(...) { if ((c)->status == 0) (c)->status = -1; }
#define luai_jmpbuf int /* dummy variable */ #define luai_jmpbuf int /* dummy variable */
#elif defined(LUA_USE_ULONGJMP) #elif defined(LUA_USE_POSIX) /* }{ */
/* in Unix, try _longjmp/_setjmp (more efficient) */
/* in POSIX, try _longjmp/_setjmp (more efficient) */
#define LUAI_THROW(L,c) _longjmp((c)->b, 1) #define LUAI_THROW(L,c) _longjmp((c)->b, 1)
#define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a } #define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }
#define luai_jmpbuf jmp_buf #define luai_jmpbuf jmp_buf
#else #else /* }{ */
/* default handling with long jumps */
/* ISO C handling with long jumps */
#define LUAI_THROW(L,c) longjmp((c)->b, 1) #define LUAI_THROW(L,c) longjmp((c)->b, 1)
#define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a } #define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }
#define luai_jmpbuf jmp_buf #define luai_jmpbuf jmp_buf
#endif #endif /* } */
#endif #endif /* } */
@ -106,15 +113,19 @@ l_noret luaD_throw (lua_State *L, int errcode) {
LUAI_THROW(L, L->errorJmp); /* jump to it */ LUAI_THROW(L, L->errorJmp); /* jump to it */
} }
else { /* thread has no error handler */ else { /* thread has no error handler */
global_State *g = G(L);
L->status = cast_byte(errcode); /* mark it as dead */ L->status = cast_byte(errcode); /* mark it as dead */
if (G(L)->mainthread->errorJmp) { /* main thread has a handler? */ if (g->mainthread->errorJmp) { /* main thread has a handler? */
setobjs2s(L, G(L)->mainthread->top++, L->top - 1); /* copy error obj. */ setobjs2s(L, g->mainthread->top++, L->top - 1); /* copy error obj. */
luaD_throw(G(L)->mainthread, errcode); /* re-throw in main thread */ luaD_throw(g->mainthread, errcode); /* re-throw in main thread */
} }
else { /* no handler at all; abort */ else { /* no handler at all; abort */
if (G(L)->panic) { /* panic function? */ if (g->panic) { /* panic function? */
seterrorobj(L, errcode, L->top); /* assume EXTRA_STACK */
if (L->ci->top < L->top)
L->ci->top = L->top; /* pushing msg. can break this invariant */
lua_unlock(L); lua_unlock(L);
G(L)->panic(L); /* call it (last chance to jump out) */ g->panic(L); /* call panic function (last chance to jump out) */
} }
abort(); abort();
} }
@ -139,12 +150,17 @@ int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
/* }====================================================== */ /* }====================================================== */
/*
** {==================================================================
** Stack reallocation
** ===================================================================
*/
static void correctstack (lua_State *L, TValue *oldstack) { static void correctstack (lua_State *L, TValue *oldstack) {
CallInfo *ci; CallInfo *ci;
GCObject *up; UpVal *up;
L->top = (L->top - oldstack) + L->stack; L->top = (L->top - oldstack) + L->stack;
for (up = L->openupval; up != NULL; up = up->gch.next) for (up = L->openupval; up != NULL; up = up->u.open.next)
gco2uv(up)->v = (gco2uv(up)->v - oldstack) + L->stack; up->v = (up->v - oldstack) + L->stack;
for (ci = L->ci; ci != NULL; ci = ci->previous) { for (ci = L->ci; ci != NULL; ci = ci->previous) {
ci->top = (ci->top - oldstack) + L->stack; ci->top = (ci->top - oldstack) + L->stack;
ci->func = (ci->func - oldstack) + L->stack; ci->func = (ci->func - oldstack) + L->stack;
@ -206,17 +222,34 @@ void luaD_shrinkstack (lua_State *L) {
int inuse = stackinuse(L); int inuse = stackinuse(L);
int goodsize = inuse + (inuse / 8) + 2*EXTRA_STACK; int goodsize = inuse + (inuse / 8) + 2*EXTRA_STACK;
if (goodsize > LUAI_MAXSTACK) goodsize = LUAI_MAXSTACK; if (goodsize > LUAI_MAXSTACK) goodsize = LUAI_MAXSTACK;
if (inuse > LUAI_MAXSTACK || /* handling stack overflow? */ if (L->stacksize > LUAI_MAXSTACK) /* was handling stack overflow? */
goodsize >= L->stacksize) /* would grow instead of shrink? */ luaE_freeCI(L); /* free all CIs (list grew because of an error) */
condmovestack(L); /* don't change stack (change only for debugging) */
else else
luaE_shrinkCI(L); /* shrink list */
if (inuse <= LUAI_MAXSTACK && /* not handling stack overflow? */
goodsize < L->stacksize) /* trying to shrink? */
luaD_reallocstack(L, goodsize); /* shrink it */ luaD_reallocstack(L, goodsize); /* shrink it */
else
condmovestack(L,,); /* don't change stack (change only for debugging) */
} }
void luaD_inctop (lua_State *L) {
luaD_checkstack(L, 1);
L->top++;
}
/* }================================================================== */
/*
** Call a hook for the given event. Make sure there is a hook to be
** called. (Both 'L->hook' and 'L->hookmask', which triggers this
** function, can be changed asynchronously by signals.)
*/
void luaD_hook (lua_State *L, int event, int line) { void luaD_hook (lua_State *L, int event, int line) {
lua_Hook hook = L->hook; lua_Hook hook = L->hook;
if (hook && L->allowhook) { if (hook && L->allowhook) { /* make sure there is a hook */
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
ptrdiff_t top = savestack(L, L->top); ptrdiff_t top = savestack(L, L->top);
ptrdiff_t ci_top = savestack(L, ci->top); ptrdiff_t ci_top = savestack(L, ci->top);
@ -258,31 +291,34 @@ static StkId adjust_varargs (lua_State *L, Proto *p, int actual) {
int i; int i;
int nfixargs = p->numparams; int nfixargs = p->numparams;
StkId base, fixed; StkId base, fixed;
lua_assert(actual >= nfixargs);
/* move fixed parameters to final position */ /* move fixed parameters to final position */
luaD_checkstack(L, p->maxstacksize); /* check again for new 'base' */
fixed = L->top - actual; /* first fixed argument */ fixed = L->top - actual; /* first fixed argument */
base = L->top; /* final position of first argument */ base = L->top; /* final position of first argument */
for (i=0; i<nfixargs; i++) { for (i = 0; i < nfixargs && i < actual; i++) {
setobjs2s(L, L->top++, fixed + i); setobjs2s(L, L->top++, fixed + i);
setnilvalue(fixed + i); setnilvalue(fixed + i); /* erase original copy (for GC) */
} }
for (; i < nfixargs; i++)
setnilvalue(L->top++); /* complete missing arguments */
return base; return base;
} }
static StkId tryfuncTM (lua_State *L, StkId func) { /*
** Check whether __call metafield of 'func' is a function. If so, put
** it in stack below original 'func' so that 'luaD_precall' can call
** it. Raise an error if __call metafield is not a function.
*/
static void tryfuncTM (lua_State *L, StkId func) {
const TValue *tm = luaT_gettmbyobj(L, func, TM_CALL); const TValue *tm = luaT_gettmbyobj(L, func, TM_CALL);
StkId p; StkId p;
ptrdiff_t funcr = savestack(L, func);
if (!ttisfunction(tm)) if (!ttisfunction(tm))
luaG_typeerror(L, func, "call"); luaG_typeerror(L, func, "call");
/* Open a hole inside the stack at `func' */ /* Open a hole inside the stack at 'func' */
for (p = L->top; p > func; p--) setobjs2s(L, p, p-1); for (p = L->top; p > func; p--)
incr_top(L); setobjs2s(L, p, p-1);
func = restorestack(L, funcr); /* previous call may change stack */ L->top++; /* slot ensured by caller */
setobj2s(L, func, tm); /* tag method is the new function to be called */ setobj2s(L, func, tm); /* tag method is the new function to be called */
return func;
} }
@ -290,79 +326,133 @@ static StkId tryfuncTM (lua_State *L, StkId func) {
#define next_ci(L) (L->ci = (L->ci->next ? L->ci->next : luaE_extendCI(L))) #define next_ci(L) (L->ci = (L->ci->next ? L->ci->next : luaE_extendCI(L)))
/* macro to check stack size, preserving 'p' */
#define checkstackp(L,n,p) \
luaD_checkstackaux(L, n, \
ptrdiff_t t__ = savestack(L, p); /* save 'p' */ \
luaC_checkGC(L), /* stack grow uses memory */ \
p = restorestack(L, t__)) /* 'pos' part: restore 'p' */
/* /*
** returns true if function has been executed (C function) ** Prepares a function call: checks the stack, creates a new CallInfo
** entry, fills in the relevant information, calls hook if needed.
** If function is a C function, does the call, too. (Otherwise, leave
** the execution ('luaV_execute') to the caller, to allow stackless
** calls.) Returns true iff function has been executed (C function).
*/ */
int luaD_precall (lua_State *L, StkId func, int nresults) { int luaD_precall (lua_State *L, StkId func, int nresults) {
lua_CFunction f; lua_CFunction f;
CallInfo *ci; CallInfo *ci;
int n; /* number of arguments (Lua) or returns (C) */
ptrdiff_t funcr = savestack(L, func);
switch (ttype(func)) { switch (ttype(func)) {
case LUA_TCCL: /* C closure */
f = clCvalue(func)->f;
goto Cfunc;
case LUA_TLCF: /* light C function */ case LUA_TLCF: /* light C function */
f = fvalue(func); f = fvalue(func);
goto Cfunc; Cfunc: {
case LUA_TCCL: { /* C closure */ int n; /* number of returns */
f = clCvalue(func)->f; checkstackp(L, LUA_MINSTACK, func); /* ensure minimum stack size */
Cfunc:
luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
ci = next_ci(L); /* now 'enter' new function */ ci = next_ci(L); /* now 'enter' new function */
ci->nresults = nresults; ci->nresults = nresults;
ci->func = restorestack(L, funcr); ci->func = func;
ci->top = L->top + LUA_MINSTACK; ci->top = L->top + LUA_MINSTACK;
lua_assert(ci->top <= L->stack_last); lua_assert(ci->top <= L->stack_last);
ci->callstatus = 0; ci->callstatus = 0;
luaC_checkGC(L); /* stack grow uses memory */
if (L->hookmask & LUA_MASKCALL) if (L->hookmask & LUA_MASKCALL)
luaD_hook(L, LUA_HOOKCALL, -1); luaD_hook(L, LUA_HOOKCALL, -1);
lua_unlock(L); lua_unlock(L);
n = (*f)(L); /* do the actual call */ n = (*f)(L); /* do the actual call */
lua_lock(L); lua_lock(L);
api_checknelems(L, n); api_checknelems(L, n);
luaD_poscall(L, L->top - n); luaD_poscall(L, ci, L->top - n, n);
return 1; return 1;
} }
case LUA_TLCL: { /* Lua function: prepare its call */ case LUA_TLCL: { /* Lua function: prepare its call */
StkId base; StkId base;
Proto *p = clLvalue(func)->p; Proto *p = clLvalue(func)->p;
n = cast_int(L->top - func) - 1; /* number of real arguments */ int n = cast_int(L->top - func) - 1; /* number of real arguments */
luaD_checkstack(L, p->maxstacksize); int fsize = p->maxstacksize; /* frame size */
for (; n < p->numparams; n++) checkstackp(L, fsize, func);
setnilvalue(L->top++); /* complete missing arguments */ if (p->is_vararg != 1) { /* do not use vararg? */
if (!p->is_vararg) { for (; n < p->numparams; n++)
func = restorestack(L, funcr); setnilvalue(L->top++); /* complete missing arguments */
base = func + 1; base = func + 1;
} }
else { else
base = adjust_varargs(L, p, n); base = adjust_varargs(L, p, n);
func = restorestack(L, funcr); /* previous call can change stack */
}
ci = next_ci(L); /* now 'enter' new function */ ci = next_ci(L); /* now 'enter' new function */
ci->nresults = nresults; ci->nresults = nresults;
ci->func = func; ci->func = func;
ci->u.l.base = base; ci->u.l.base = base;
ci->top = base + p->maxstacksize; L->top = ci->top = base + fsize;
lua_assert(ci->top <= L->stack_last); lua_assert(ci->top <= L->stack_last);
ci->u.l.savedpc = p->code; /* starting point */ ci->u.l.savedpc = p->code; /* starting point */
ci->callstatus = CIST_LUA; ci->callstatus = CIST_LUA;
L->top = ci->top;
luaC_checkGC(L); /* stack grow uses memory */
if (L->hookmask & LUA_MASKCALL) if (L->hookmask & LUA_MASKCALL)
callhook(L, ci); callhook(L, ci);
return 0; return 0;
} }
default: { /* not a function */ default: { /* not a function */
func = tryfuncTM(L, func); /* retry with 'function' tag method */ checkstackp(L, 1, func); /* ensure space for metamethod */
tryfuncTM(L, func); /* try to get '__call' metamethod */
return luaD_precall(L, func, nresults); /* now it must be a function */ return luaD_precall(L, func, nresults); /* now it must be a function */
} }
} }
} }
int luaD_poscall (lua_State *L, StkId firstResult) { /*
** Given 'nres' results at 'firstResult', move 'wanted' of them to 'res'.
** Handle most typical cases (zero results for commands, one result for
** expressions, multiple results for tail calls/single parameters)
** separated.
*/
static int moveresults (lua_State *L, const TValue *firstResult, StkId res,
int nres, int wanted) {
switch (wanted) { /* handle typical cases separately */
case 0: break; /* nothing to move */
case 1: { /* one result needed */
if (nres == 0) /* no results? */
firstResult = luaO_nilobject; /* adjust with nil */
setobjs2s(L, res, firstResult); /* move it to proper place */
break;
}
case LUA_MULTRET: {
int i;
for (i = 0; i < nres; i++) /* move all results to correct place */
setobjs2s(L, res + i, firstResult + i);
L->top = res + nres;
return 0; /* wanted == LUA_MULTRET */
}
default: {
int i;
if (wanted <= nres) { /* enough results? */
for (i = 0; i < wanted; i++) /* move wanted results to correct place */
setobjs2s(L, res + i, firstResult + i);
}
else { /* not enough results; use all of them plus nils */
for (i = 0; i < nres; i++) /* move all results to correct place */
setobjs2s(L, res + i, firstResult + i);
for (; i < wanted; i++) /* complete wanted number of results */
setnilvalue(res + i);
}
break;
}
}
L->top = res + wanted; /* top points after the last result */
return 1;
}
/*
** Finishes a function call: calls hook if necessary, removes CallInfo,
** moves current number of results to proper place; returns 0 iff call
** wanted multiple (variable number of) results.
*/
int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult, int nres) {
StkId res; StkId res;
int wanted, i; int wanted = ci->nresults;
CallInfo *ci = L->ci;
if (L->hookmask & (LUA_MASKRET | LUA_MASKLINE)) { if (L->hookmask & (LUA_MASKRET | LUA_MASKLINE)) {
if (L->hookmask & LUA_MASKRET) { if (L->hookmask & LUA_MASKRET) {
ptrdiff_t fr = savestack(L, firstResult); /* hook may change stack */ ptrdiff_t fr = savestack(L, firstResult); /* hook may change stack */
@ -372,15 +462,24 @@ int luaD_poscall (lua_State *L, StkId firstResult) {
L->oldpc = ci->previous->u.l.savedpc; /* 'oldpc' for caller function */ L->oldpc = ci->previous->u.l.savedpc; /* 'oldpc' for caller function */
} }
res = ci->func; /* res == final position of 1st result */ res = ci->func; /* res == final position of 1st result */
wanted = ci->nresults; L->ci = ci->previous; /* back to caller */
L->ci = ci = ci->previous; /* back to caller */ /* move results to proper place */
/* move results to correct place */ return moveresults(L, firstResult, res, nres, wanted);
for (i = wanted; i != 0 && firstResult < L->top; i--) }
setobjs2s(L, res++, firstResult++);
while (i-- > 0)
setnilvalue(res++); /*
L->top = res; ** Check appropriate error for stack overflow ("regular" overflow or
return (wanted - LUA_MULTRET); /* 0 iff wanted == LUA_MULTRET */ ** overflow while handling stack overflow). If 'nCalls' is larger than
** LUAI_MAXCCALLS (which means it is handling a "regular" overflow) but
** smaller than 9/8 of LUAI_MAXCCALLS, does not report an error (to
** allow overflow handling to work)
*/
static void stackerror (lua_State *L) {
if (L->nCcalls == LUAI_MAXCCALLS)
luaG_runerror(L, "C stack overflow");
else if (L->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3)))
luaD_throw(L, LUA_ERRERR); /* error while handing stack error */
} }
@ -390,53 +489,67 @@ int luaD_poscall (lua_State *L, StkId firstResult) {
** When returns, all the results are on the stack, starting at the original ** When returns, all the results are on the stack, starting at the original
** function position. ** function position.
*/ */
void luaD_call (lua_State *L, StkId func, int nResults, int allowyield) { void luaD_call (lua_State *L, StkId func, int nResults) {
if (++L->nCcalls >= LUAI_MAXCCALLS) { if (++L->nCcalls >= LUAI_MAXCCALLS)
if (L->nCcalls == LUAI_MAXCCALLS) stackerror(L);
luaG_runerror(L, "C stack overflow");
else if (L->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3)))
luaD_throw(L, LUA_ERRERR); /* error while handing stack error */
}
if (!allowyield) L->nny++;
if (!luaD_precall(L, func, nResults)) /* is a Lua function? */ if (!luaD_precall(L, func, nResults)) /* is a Lua function? */
luaV_execute(L); /* call it */ luaV_execute(L); /* call it */
if (!allowyield) L->nny--;
L->nCcalls--; L->nCcalls--;
} }
static void finishCcall (lua_State *L) { /*
** Similar to 'luaD_call', but does not allow yields during the call
*/
void luaD_callnoyield (lua_State *L, StkId func, int nResults) {
L->nny++;
luaD_call(L, func, nResults);
L->nny--;
}
/*
** Completes the execution of an interrupted C function, calling its
** continuation function.
*/
static void finishCcall (lua_State *L, int status) {
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
int n; int n;
lua_assert(ci->u.c.k != NULL); /* must have a continuation */ /* must have a continuation and must be able to call it */
lua_assert(L->nny == 0); lua_assert(ci->u.c.k != NULL && L->nny == 0);
/* error status can only happen in a protected call */
lua_assert((ci->callstatus & CIST_YPCALL) || status == LUA_YIELD);
if (ci->callstatus & CIST_YPCALL) { /* was inside a pcall? */ if (ci->callstatus & CIST_YPCALL) { /* was inside a pcall? */
ci->callstatus &= ~CIST_YPCALL; /* finish 'lua_pcall' */ ci->callstatus &= ~CIST_YPCALL; /* finish 'lua_pcall' */
L->errfunc = ci->u.c.old_errfunc; L->errfunc = ci->u.c.old_errfunc;
} }
/* finish 'lua_callk'/'lua_pcall' */ /* finish 'lua_callk'/'lua_pcall'; CIST_YPCALL and 'errfunc' already
handled */
adjustresults(L, ci->nresults); adjustresults(L, ci->nresults);
/* call continuation function */ /* call continuation function */
if (!(ci->callstatus & CIST_STAT)) /* no call status? */
ci->u.c.status = LUA_YIELD; /* 'default' status */
lua_assert(ci->u.c.status != LUA_OK);
ci->callstatus = (ci->callstatus & ~(CIST_YPCALL | CIST_STAT)) | CIST_YIELDED;
lua_unlock(L); lua_unlock(L);
n = (*ci->u.c.k)(L); n = (*ci->u.c.k)(L, status, ci->u.c.ctx);
lua_lock(L); lua_lock(L);
api_checknelems(L, n); api_checknelems(L, n);
/* finish 'luaD_precall' */ /* finish 'luaD_precall' */
luaD_poscall(L, L->top - n); luaD_poscall(L, ci, L->top - n, n);
} }
/*
** Executes "full continuation" (everything in the stack) of a
** previously interrupted coroutine until the stack is empty (or another
** interruption long-jumps out of the loop). If the coroutine is
** recovering from an error, 'ud' points to the error status, which must
** be passed to the first continuation function (otherwise the default
** status is LUA_YIELD).
*/
static void unroll (lua_State *L, void *ud) { static void unroll (lua_State *L, void *ud) {
UNUSED(ud); if (ud != NULL) /* error status? */
for (;;) { finishCcall(L, *(int *)ud); /* finish 'lua_pcallk' callee */
if (L->ci == &L->base_ci) /* stack is empty? */ while (L->ci != &L->base_ci) { /* something in the stack */
return; /* coroutine finished normally */
if (!isLua(L->ci)) /* C function? */ if (!isLua(L->ci)) /* C function? */
finishCcall(L); finishCcall(L, LUA_YIELD); /* complete its execution */
else { /* Lua function */ else { /* Lua function */
luaV_finishOp(L); /* finish interrupted instruction */ luaV_finishOp(L); /* finish interrupted instruction */
luaV_execute(L); /* execute down to higher C 'boundary' */ luaV_execute(L); /* execute down to higher C 'boundary' */
@ -446,7 +559,8 @@ static void unroll (lua_State *L, void *ud) {
/* /*
** check whether thread has a suspended protected call ** Try to find a suspended protected call (a "recover point") for the
** given thread.
*/ */
static CallInfo *findpcall (lua_State *L) { static CallInfo *findpcall (lua_State *L) {
CallInfo *ci; CallInfo *ci;
@ -458,6 +572,11 @@ static CallInfo *findpcall (lua_State *L) {
} }
/*
** Recovers from an error in a coroutine. Finds a recover point (if
** there is one) and completes the execution of the interrupted
** 'luaD_pcall'. If there is no recover point, returns zero.
*/
static int recover (lua_State *L, int status) { static int recover (lua_State *L, int status) {
StkId oldtop; StkId oldtop;
CallInfo *ci = findpcall(L); CallInfo *ci = findpcall(L);
@ -467,12 +586,10 @@ static int recover (lua_State *L, int status) {
luaF_close(L, oldtop); luaF_close(L, oldtop);
seterrorobj(L, status, oldtop); seterrorobj(L, status, oldtop);
L->ci = ci; L->ci = ci;
L->allowhook = ci->u.c.old_allowhook; L->allowhook = getoah(ci->callstatus); /* restore original 'allowhook' */
L->nny = 0; /* should be zero to be yieldable */ L->nny = 0; /* should be zero to be yieldable */
luaD_shrinkstack(L); luaD_shrinkstack(L);
L->errfunc = ci->u.c.old_errfunc; L->errfunc = ci->u.c.old_errfunc;
ci->callstatus |= CIST_STAT; /* call has error status */
ci->u.c.status = status; /* (here it is) */
return 1; /* continue running the coroutine */ return 1; /* continue running the coroutine */
} }
@ -491,11 +608,16 @@ static l_noret resume_error (lua_State *L, const char *msg, StkId firstArg) {
/* /*
** do the work for 'lua_resume' in protected mode ** Do the work for 'lua_resume' in protected mode. Most of the work
** depends on the status of the coroutine: initial state, suspended
** inside a hook, or regularly suspended (optionally with a continuation
** function), plus erroneous cases: non-suspended coroutine or dead
** coroutine.
*/ */
static void resume (lua_State *L, void *ud) { static void resume (lua_State *L, void *ud) {
int nCcalls = L->nCcalls; int nCcalls = L->nCcalls;
StkId firstArg = cast(StkId, ud); int n = *(cast(int*, ud)); /* number of arguments */
StkId firstArg = L->top - n; /* first argument */
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
if (nCcalls >= LUAI_MAXCCALLS) if (nCcalls >= LUAI_MAXCCALLS)
resume_error(L, "C stack overflow", firstArg); resume_error(L, "C stack overflow", firstArg);
@ -509,24 +631,21 @@ static void resume (lua_State *L, void *ud) {
else if (L->status != LUA_YIELD) else if (L->status != LUA_YIELD)
resume_error(L, "cannot resume dead coroutine", firstArg); resume_error(L, "cannot resume dead coroutine", firstArg);
else { /* resuming from previous yield */ else { /* resuming from previous yield */
L->status = LUA_OK; L->status = LUA_OK; /* mark that it is running (again) */
ci->func = restorestack(L, ci->extra); ci->func = restorestack(L, ci->extra);
if (isLua(ci)) /* yielded inside a hook? */ if (isLua(ci)) /* yielded inside a hook? */
luaV_execute(L); /* just continue running Lua code */ luaV_execute(L); /* just continue running Lua code */
else { /* 'common' yield */ else { /* 'common' yield */
if (ci->u.c.k != NULL) { /* does it have a continuation? */ if (ci->u.c.k != NULL) { /* does it have a continuation function? */
int n;
ci->u.c.status = LUA_YIELD; /* 'default' status */
ci->callstatus |= CIST_YIELDED;
lua_unlock(L); lua_unlock(L);
n = (*ci->u.c.k)(L); /* call continuation */ n = (*ci->u.c.k)(L, LUA_YIELD, ci->u.c.ctx); /* call continuation */
lua_lock(L); lua_lock(L);
api_checknelems(L, n); api_checknelems(L, n);
firstArg = L->top - n; /* yield results come from continuation */ firstArg = L->top - n; /* yield results come from continuation */
} }
luaD_poscall(L, firstArg); /* finish 'luaD_precall' */ luaD_poscall(L, ci, firstArg, n); /* finish 'luaD_precall' */
} }
unroll(L, NULL); unroll(L, NULL); /* run continuation */
} }
lua_assert(nCcalls == L->nCcalls); lua_assert(nCcalls == L->nCcalls);
} }
@ -534,27 +653,26 @@ static void resume (lua_State *L, void *ud) {
LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) { LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
int status; int status;
int oldnny = L->nny; /* save 'nny' */ unsigned short oldnny = L->nny; /* save "number of non-yieldable" calls */
lua_lock(L); lua_lock(L);
luai_userstateresume(L, nargs); luai_userstateresume(L, nargs);
L->nCcalls = (from) ? from->nCcalls + 1 : 1; L->nCcalls = (from) ? from->nCcalls + 1 : 1;
L->nny = 0; /* allow yields */ L->nny = 0; /* allow yields */
api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs); api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs);
status = luaD_rawrunprotected(L, resume, L->top - nargs); status = luaD_rawrunprotected(L, resume, &nargs);
if (status == -1) /* error calling 'lua_resume'? */ if (status == -1) /* error calling 'lua_resume'? */
status = LUA_ERRRUN; status = LUA_ERRRUN;
else { /* yield or regular error */ else { /* continue running after recoverable errors */
while (status != LUA_OK && status != LUA_YIELD) { /* error? */ while (errorstatus(status) && recover(L, status)) {
if (recover(L, status)) /* recover point? */ /* unroll continuation */
status = luaD_rawrunprotected(L, unroll, NULL); /* run continuation */ status = luaD_rawrunprotected(L, unroll, &status);
else { /* unrecoverable error */
L->status = cast_byte(status); /* mark thread as `dead' */
seterrorobj(L, status, L->top);
L->ci->top = L->top;
break;
}
} }
lua_assert(status == L->status); if (errorstatus(status)) { /* unrecoverable error? */
L->status = cast_byte(status); /* mark thread as 'dead' */
seterrorobj(L, status, L->top); /* push error message */
L->ci->top = L->top;
}
else lua_assert(status == L->status); /* normal end or yield */
} }
L->nny = oldnny; /* restore 'nny' */ L->nny = oldnny; /* restore 'nny' */
L->nCcalls--; L->nCcalls--;
@ -564,7 +682,13 @@ LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
} }
LUA_API int lua_yieldk (lua_State *L, int nresults, int ctx, lua_CFunction k) { LUA_API int lua_isyieldable (lua_State *L) {
return (L->nny == 0);
}
LUA_API int lua_yieldk (lua_State *L, int nresults, lua_KContext ctx,
lua_KFunction k) {
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
luai_userstateyield(L, nresults); luai_userstateyield(L, nresults);
lua_lock(L); lua_lock(L);
@ -619,7 +743,7 @@ int luaD_pcall (lua_State *L, Pfunc func, void *u,
/* /*
** Execute a protected parser. ** Execute a protected parser.
*/ */
struct SParser { /* data to `f_parser' */ struct SParser { /* data to 'f_parser' */
ZIO *z; ZIO *z;
Mbuffer buff; /* dynamic structure used by the scanner */ Mbuffer buff; /* dynamic structure used by the scanner */
Dyndata dyd; /* dynamic structures used by the parser */ Dyndata dyd; /* dynamic structures used by the parser */
@ -631,31 +755,26 @@ struct SParser { /* data to `f_parser' */
static void checkmode (lua_State *L, const char *mode, const char *x) { static void checkmode (lua_State *L, const char *mode, const char *x) {
if (mode && strchr(mode, x[0]) == NULL) { if (mode && strchr(mode, x[0]) == NULL) {
luaO_pushfstring(L, luaO_pushfstring(L,
"attempt to load a %s chunk (mode is " LUA_QS ")", x, mode); "attempt to load a %s chunk (mode is '%s')", x, mode);
luaD_throw(L, LUA_ERRSYNTAX); luaD_throw(L, LUA_ERRSYNTAX);
} }
} }
static void f_parser (lua_State *L, void *ud) { static void f_parser (lua_State *L, void *ud) {
int i; LClosure *cl;
Closure *cl;
struct SParser *p = cast(struct SParser *, ud); struct SParser *p = cast(struct SParser *, ud);
int c = zgetc(p->z); /* read first character */ int c = zgetc(p->z); /* read first character */
if (c == LUA_SIGNATURE[0]) { if (c == LUA_SIGNATURE[0]) {
checkmode(L, p->mode, "binary"); checkmode(L, p->mode, "binary");
cl = luaU_undump(L, p->z, &p->buff, p->name); cl = luaU_undump(L, p->z, p->name);
} }
else { else {
checkmode(L, p->mode, "text"); checkmode(L, p->mode, "text");
cl = luaY_parser(L, p->z, &p->buff, &p->dyd, p->name, c); cl = luaY_parser(L, p->z, &p->buff, &p->dyd, p->name, c);
} }
lua_assert(cl->l.nupvalues == cl->l.p->sizeupvalues); lua_assert(cl->nupvalues == cl->p->sizeupvalues);
for (i = 0; i < cl->l.nupvalues; i++) { /* initialize upvalues */ luaF_initupvals(L, cl);
UpVal *up = luaF_newupval(L);
cl->l.upvals[i] = up;
luaC_objbarrier(L, cl, up);
}
} }

@ -1,173 +1,215 @@
/* /*
** $Id: ldump.c,v 2.17.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: ldump.c,v 2.37 2015/10/08 15:53:49 roberto Exp $
** save precompiled Lua chunks ** save precompiled Lua chunks
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <stddef.h>
#define ldump_c #define ldump_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include <stddef.h>
#include "lua.h" #include "lua.h"
#include "lobject.h" #include "lobject.h"
#include "lstate.h" #include "lstate.h"
#include "lundump.h" #include "lundump.h"
typedef struct { typedef struct {
lua_State* L; lua_State *L;
lua_Writer writer; lua_Writer writer;
void* data; void *data;
int strip; int strip;
int status; int status;
} DumpState; } DumpState;
#define DumpMem(b,n,size,D) DumpBlock(b,(n)*(size),D)
#define DumpVar(x,D) DumpMem(&x,1,sizeof(x),D) /*
** All high-level dumps go through DumpVector; you can change it to
static void DumpBlock(const void* b, size_t size, DumpState* D) ** change the endianness of the result
{ */
if (D->status==0) #define DumpVector(v,n,D) DumpBlock(v,(n)*sizeof((v)[0]),D)
{
lua_unlock(D->L); #define DumpLiteral(s,D) DumpBlock(s, sizeof(s) - sizeof(char), D)
D->status=(*D->writer)(D->L,b,size,D->data);
lua_lock(D->L);
} static void DumpBlock (const void *b, size_t size, DumpState *D) {
if (D->status == 0 && size > 0) {
lua_unlock(D->L);
D->status = (*D->writer)(D->L, b, size, D->data);
lua_lock(D->L);
}
} }
static void DumpChar(int y, DumpState* D)
{ #define DumpVar(x,D) DumpVector(&x,1,D)
char x=(char)y;
DumpVar(x,D);
static void DumpByte (int y, DumpState *D) {
lu_byte x = (lu_byte)y;
DumpVar(x, D);
} }
static void DumpInt(int x, DumpState* D)
{ static void DumpInt (int x, DumpState *D) {
DumpVar(x,D); DumpVar(x, D);
} }
static void DumpNumber(lua_Number x, DumpState* D)
{ static void DumpNumber (lua_Number x, DumpState *D) {
DumpVar(x,D); DumpVar(x, D);
} }
static void DumpVector(const void* b, int n, size_t size, DumpState* D)
{ static void DumpInteger (lua_Integer x, DumpState *D) {
DumpInt(n,D); DumpVar(x, D);
DumpMem(b,n,size,D);
} }
static void DumpString(const TString* s, DumpState* D)
{ static void DumpString (const TString *s, DumpState *D) {
if (s==NULL) if (s == NULL)
{ DumpByte(0, D);
size_t size=0; else {
DumpVar(size,D); size_t size = tsslen(s) + 1; /* include trailing '\0' */
} const char *str = getstr(s);
else if (size < 0xFF)
{ DumpByte(cast_int(size), D);
size_t size=s->tsv.len+1; /* include trailing '\0' */ else {
DumpVar(size,D); DumpByte(0xFF, D);
DumpBlock(getstr(s),size*sizeof(char),D); DumpVar(size, D);
} }
DumpVector(str, size - 1, D); /* no need to save '\0' */
}
} }
#define DumpCode(f,D) DumpVector(f->code,f->sizecode,sizeof(Instruction),D)
static void DumpCode (const Proto *f, DumpState *D) {
static void DumpFunction(const Proto* f, DumpState* D); DumpInt(f->sizecode, D);
DumpVector(f->code, f->sizecode, D);
static void DumpConstants(const Proto* f, DumpState* D) }
{
int i,n=f->sizek;
DumpInt(n,D); static void DumpFunction(const Proto *f, TString *psource, DumpState *D);
for (i=0; i<n; i++)
{ static void DumpConstants (const Proto *f, DumpState *D) {
const TValue* o=&f->k[i]; int i;
DumpChar(ttypenv(o),D); int n = f->sizek;
switch (ttypenv(o)) DumpInt(n, D);
{ for (i = 0; i < n; i++) {
case LUA_TNIL: const TValue *o = &f->k[i];
break; DumpByte(ttype(o), D);
case LUA_TBOOLEAN: switch (ttype(o)) {
DumpChar(bvalue(o),D); case LUA_TNIL:
break; break;
case LUA_TNUMBER: case LUA_TBOOLEAN:
DumpNumber(nvalue(o),D); DumpByte(bvalue(o), D);
break; break;
case LUA_TSTRING: case LUA_TNUMFLT:
DumpString(rawtsvalue(o),D); DumpNumber(fltvalue(o), D);
break; break;
default: lua_assert(0); case LUA_TNUMINT:
DumpInteger(ivalue(o), D);
break;
case LUA_TSHRSTR:
case LUA_TLNGSTR:
DumpString(tsvalue(o), D);
break;
default:
lua_assert(0);
}
} }
}
n=f->sizep;
DumpInt(n,D);
for (i=0; i<n; i++) DumpFunction(f->p[i],D);
} }
static void DumpUpvalues(const Proto* f, DumpState* D)
{ static void DumpProtos (const Proto *f, DumpState *D) {
int i,n=f->sizeupvalues; int i;
DumpInt(n,D); int n = f->sizep;
for (i=0; i<n; i++) DumpInt(n, D);
{ for (i = 0; i < n; i++)
DumpChar(f->upvalues[i].instack,D); DumpFunction(f->p[i], f->source, D);
DumpChar(f->upvalues[i].idx,D); }
}
static void DumpUpvalues (const Proto *f, DumpState *D) {
int i, n = f->sizeupvalues;
DumpInt(n, D);
for (i = 0; i < n; i++) {
DumpByte(f->upvalues[i].instack, D);
DumpByte(f->upvalues[i].idx, D);
}
} }
static void DumpDebug(const Proto* f, DumpState* D)
{ static void DumpDebug (const Proto *f, DumpState *D) {
int i,n; int i, n;
DumpString((D->strip) ? NULL : f->source,D); n = (D->strip) ? 0 : f->sizelineinfo;
n= (D->strip) ? 0 : f->sizelineinfo; DumpInt(n, D);
DumpVector(f->lineinfo,n,sizeof(int),D); DumpVector(f->lineinfo, n, D);
n= (D->strip) ? 0 : f->sizelocvars; n = (D->strip) ? 0 : f->sizelocvars;
DumpInt(n,D); DumpInt(n, D);
for (i=0; i<n; i++) for (i = 0; i < n; i++) {
{ DumpString(f->locvars[i].varname, D);
DumpString(f->locvars[i].varname,D); DumpInt(f->locvars[i].startpc, D);
DumpInt(f->locvars[i].startpc,D); DumpInt(f->locvars[i].endpc, D);
DumpInt(f->locvars[i].endpc,D); }
} n = (D->strip) ? 0 : f->sizeupvalues;
n= (D->strip) ? 0 : f->sizeupvalues; DumpInt(n, D);
DumpInt(n,D); for (i = 0; i < n; i++)
for (i=0; i<n; i++) DumpString(f->upvalues[i].name,D); DumpString(f->upvalues[i].name, D);
} }
static void DumpFunction(const Proto* f, DumpState* D)
{ static void DumpFunction (const Proto *f, TString *psource, DumpState *D) {
DumpInt(f->linedefined,D); if (D->strip || f->source == psource)
DumpInt(f->lastlinedefined,D); DumpString(NULL, D); /* no debug info or same source as its parent */
DumpChar(f->numparams,D); else
DumpChar(f->is_vararg,D); DumpString(f->source, D);
DumpChar(f->maxstacksize,D); DumpInt(f->linedefined, D);
DumpCode(f,D); DumpInt(f->lastlinedefined, D);
DumpConstants(f,D); DumpByte(f->numparams, D);
DumpUpvalues(f,D); DumpByte(f->is_vararg, D);
DumpDebug(f,D); DumpByte(f->maxstacksize, D);
DumpCode(f, D);
DumpConstants(f, D);
DumpUpvalues(f, D);
DumpProtos(f, D);
DumpDebug(f, D);
} }
static void DumpHeader(DumpState* D)
{ static void DumpHeader (DumpState *D) {
lu_byte h[LUAC_HEADERSIZE]; DumpLiteral(LUA_SIGNATURE, D);
luaU_header(h); DumpByte(LUAC_VERSION, D);
DumpBlock(h,LUAC_HEADERSIZE,D); DumpByte(LUAC_FORMAT, D);
DumpLiteral(LUAC_DATA, D);
DumpByte(sizeof(int), D);
DumpByte(sizeof(size_t), D);
DumpByte(sizeof(Instruction), D);
DumpByte(sizeof(lua_Integer), D);
DumpByte(sizeof(lua_Number), D);
DumpInteger(LUAC_INT, D);
DumpNumber(LUAC_NUM, D);
} }
/* /*
** dump Lua function as precompiled chunk ** dump Lua function as precompiled chunk
*/ */
int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip) int luaU_dump(lua_State *L, const Proto *f, lua_Writer w, void *data,
{ int strip) {
DumpState D; DumpState D;
D.L=L; D.L = L;
D.writer=w; D.writer = w;
D.data=data; D.data = data;
D.strip=strip; D.strip = strip;
D.status=0; D.status = 0;
DumpHeader(&D); DumpHeader(&D);
DumpFunction(f,&D); DumpByte(f->sizeupvalues, &D);
return D.status; DumpFunction(f, NULL, &D);
return D.status;
} }

@ -1,15 +1,17 @@
/* /*
** $Id: lfunc.c,v 2.30.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lfunc.c,v 2.45 2014/11/02 19:19:04 roberto Exp $
** Auxiliary functions to manipulate prototypes and closures ** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <stddef.h>
#define lfunc_c #define lfunc_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include <stddef.h>
#include "lua.h" #include "lua.h"
#include "lfunc.h" #include "lfunc.h"
@ -20,95 +22,83 @@
Closure *luaF_newCclosure (lua_State *L, int n) { CClosure *luaF_newCclosure (lua_State *L, int n) {
Closure *c = &luaC_newobj(L, LUA_TCCL, sizeCclosure(n), NULL, 0)->cl; GCObject *o = luaC_newobj(L, LUA_TCCL, sizeCclosure(n));
c->c.nupvalues = cast_byte(n); CClosure *c = gco2ccl(o);
c->nupvalues = cast_byte(n);
return c; return c;
} }
Closure *luaF_newLclosure (lua_State *L, int n) { LClosure *luaF_newLclosure (lua_State *L, int n) {
Closure *c = &luaC_newobj(L, LUA_TLCL, sizeLclosure(n), NULL, 0)->cl; GCObject *o = luaC_newobj(L, LUA_TLCL, sizeLclosure(n));
c->l.p = NULL; LClosure *c = gco2lcl(o);
c->l.nupvalues = cast_byte(n); c->p = NULL;
while (n--) c->l.upvals[n] = NULL; c->nupvalues = cast_byte(n);
while (n--) c->upvals[n] = NULL;
return c; return c;
} }
/*
UpVal *luaF_newupval (lua_State *L) { ** fill a closure with new closed upvalues
UpVal *uv = &luaC_newobj(L, LUA_TUPVAL, sizeof(UpVal), NULL, 0)->uv; */
uv->v = &uv->u.value; void luaF_initupvals (lua_State *L, LClosure *cl) {
setnilvalue(uv->v); int i;
return uv; for (i = 0; i < cl->nupvalues; i++) {
UpVal *uv = luaM_new(L, UpVal);
uv->refcount = 1;
uv->v = &uv->u.value; /* make it closed */
setnilvalue(uv->v);
cl->upvals[i] = uv;
}
} }
UpVal *luaF_findupval (lua_State *L, StkId level) { UpVal *luaF_findupval (lua_State *L, StkId level) {
global_State *g = G(L); UpVal **pp = &L->openupval;
GCObject **pp = &L->openupval;
UpVal *p; UpVal *p;
UpVal *uv; UpVal *uv;
while (*pp != NULL && (p = gco2uv(*pp))->v >= level) { lua_assert(isintwups(L) || L->openupval == NULL);
GCObject *o = obj2gco(p); while (*pp != NULL && (p = *pp)->v >= level) {
lua_assert(p->v != &p->u.value); lua_assert(upisopen(p));
lua_assert(!isold(o) || isold(obj2gco(L))); if (p->v == level) /* found a corresponding upvalue? */
if (p->v == level) { /* found a corresponding upvalue? */ return p; /* return it */
if (isdead(g, o)) /* is it dead? */ pp = &p->u.open.next;
changewhite(o); /* resurrect it */
return p;
}
pp = &p->next;
} }
/* not found: create a new one */ /* not found: create a new upvalue */
uv = &luaC_newobj(L, LUA_TUPVAL, sizeof(UpVal), pp, 0)->uv; uv = luaM_new(L, UpVal);
uv->refcount = 0;
uv->u.open.next = *pp; /* link it to list of open upvalues */
uv->u.open.touched = 1;
*pp = uv;
uv->v = level; /* current value lives in the stack */ uv->v = level; /* current value lives in the stack */
uv->u.l.prev = &g->uvhead; /* double link it in `uvhead' list */ if (!isintwups(L)) { /* thread not in list of threads with upvalues? */
uv->u.l.next = g->uvhead.u.l.next; L->twups = G(L)->twups; /* link it to the list */
uv->u.l.next->u.l.prev = uv; G(L)->twups = L;
g->uvhead.u.l.next = uv; }
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
return uv; return uv;
} }
static void unlinkupval (UpVal *uv) {
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
uv->u.l.next->u.l.prev = uv->u.l.prev; /* remove from `uvhead' list */
uv->u.l.prev->u.l.next = uv->u.l.next;
}
void luaF_freeupval (lua_State *L, UpVal *uv) {
if (uv->v != &uv->u.value) /* is it open? */
unlinkupval(uv); /* remove from open list */
luaM_free(L, uv); /* free upvalue */
}
void luaF_close (lua_State *L, StkId level) { void luaF_close (lua_State *L, StkId level) {
UpVal *uv; UpVal *uv;
global_State *g = G(L); while (L->openupval != NULL && (uv = L->openupval)->v >= level) {
while (L->openupval != NULL && (uv = gco2uv(L->openupval))->v >= level) { lua_assert(upisopen(uv));
GCObject *o = obj2gco(uv); L->openupval = uv->u.open.next; /* remove from 'open' list */
lua_assert(!isblack(o) && uv->v != &uv->u.value); if (uv->refcount == 0) /* no references? */
L->openupval = uv->next; /* remove from `open' list */ luaM_free(L, uv); /* free upvalue */
if (isdead(g, o))
luaF_freeupval(L, uv); /* free upvalue */
else { else {
unlinkupval(uv); /* remove upvalue from 'uvhead' list */
setobj(L, &uv->u.value, uv->v); /* move value to upvalue slot */ setobj(L, &uv->u.value, uv->v); /* move value to upvalue slot */
uv->v = &uv->u.value; /* now current value lives here */ uv->v = &uv->u.value; /* now current value lives here */
gch(o)->next = g->allgc; /* link upvalue into 'allgc' list */ luaC_upvalbarrier(L, uv);
g->allgc = o;
luaC_checkupvalcolor(g, uv);
} }
} }
} }
Proto *luaF_newproto (lua_State *L) { Proto *luaF_newproto (lua_State *L) {
Proto *f = &luaC_newobj(L, LUA_TPROTO, sizeof(Proto), NULL, 0)->p; GCObject *o = luaC_newobj(L, LUA_TPROTO, sizeof(Proto));
Proto *f = gco2p(o);
f->k = NULL; f->k = NULL;
f->sizek = 0; f->sizek = 0;
f->p = NULL; f->p = NULL;
@ -144,7 +134,7 @@ void luaF_freeproto (lua_State *L, Proto *f) {
/* /*
** Look for n-th local variable at line `line' in function `func'. ** Look for n-th local variable at line 'line' in function 'func'.
** Returns NULL if not found. ** Returns NULL if not found.
*/ */
const char *luaF_getlocalname (const Proto *f, int local_number, int pc) { const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {

File diff suppressed because it is too large Load Diff

@ -1,20 +1,33 @@
/* /*
** $Id: linit.c,v 1.32.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: linit.c,v 1.38 2015/01/05 13:48:33 roberto Exp $
** Initialization of libraries for lua.c and other clients ** Initialization of libraries for lua.c and other clients
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define linit_c
#define LUA_LIB
/* /*
** If you embed Lua in your program and need to open the standard ** If you embed Lua in your program and need to open the standard
** libraries, call luaL_openlibs in your program. If you need a ** libraries, call luaL_openlibs in your program. If you need a
** different set of libraries, copy this file to your project and edit ** different set of libraries, copy this file to your project and edit
** it to suit your needs. ** it to suit your needs.
**
** You can also *preload* libraries, so that a later 'require' can
** open the library, which is already linked to the application.
** For that, do the following code:
**
** luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
** lua_pushcfunction(L, luaopen_modname);
** lua_setfield(L, -2, modname);
** lua_pop(L, 1); // remove _PRELOAD table
*/ */
#include "lprefix.h"
#define linit_c
#define LUA_LIB #include <stddef.h>
#include "lua.h" #include "lua.h"
@ -34,34 +47,22 @@ static const luaL_Reg loadedlibs[] = {
{LUA_IOLIBNAME, luaopen_io}, {LUA_IOLIBNAME, luaopen_io},
{LUA_OSLIBNAME, luaopen_os}, {LUA_OSLIBNAME, luaopen_os},
{LUA_STRLIBNAME, luaopen_string}, {LUA_STRLIBNAME, luaopen_string},
{LUA_BITLIBNAME, luaopen_bit32},
{LUA_MATHLIBNAME, luaopen_math}, {LUA_MATHLIBNAME, luaopen_math},
{LUA_UTF8LIBNAME, luaopen_utf8},
{LUA_DBLIBNAME, luaopen_debug}, {LUA_DBLIBNAME, luaopen_debug},
{NULL, NULL} #if defined(LUA_COMPAT_BITLIB)
}; {LUA_BITLIBNAME, luaopen_bit32},
#endif
/*
** these libs are preloaded and must be required before used
*/
static const luaL_Reg preloadedlibs[] = {
{NULL, NULL} {NULL, NULL}
}; };
LUALIB_API void luaL_openlibs (lua_State *L) { LUALIB_API void luaL_openlibs (lua_State *L) {
const luaL_Reg *lib; const luaL_Reg *lib;
/* call open functions from 'loadedlibs' and set results to global table */ /* "require" functions from 'loadedlibs' and set results to global table */
for (lib = loadedlibs; lib->func; lib++) { for (lib = loadedlibs; lib->func; lib++) {
luaL_requiref(L, lib->name, lib->func, 1); luaL_requiref(L, lib->name, lib->func, 1);
lua_pop(L, 1); /* remove lib */ lua_pop(L, 1); /* remove lib */
} }
/* add open functions from 'preloadedlibs' into 'package.preload' table */
luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
for (lib = preloadedlibs; lib->func; lib++) {
lua_pushcfunction(L, lib->func);
lua_setfield(L, -2, lib->name);
}
lua_pop(L, 1); /* remove _PRELOAD table */
} }

@ -1,120 +1,139 @@
/* /*
** $Id: liolib.c,v 2.112.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: liolib.c,v 2.149 2016/05/02 14:03:19 roberto Exp $
** Standard I/O (and system) library ** Standard I/O (and system) library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define liolib_c
#define LUA_LIB
/* #include "lprefix.h"
** This definition must come before the inclusion of 'stdio.h'; it
** should not affect non-POSIX systems
*/
#if !defined(_FILE_OFFSET_BITS)
#define _LARGEFILE_SOURCE 1
#define _FILE_OFFSET_BITS 64
#endif
#include <ctype.h>
#include <errno.h> #include <errno.h>
#include <locale.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define liolib_c
#define LUA_LIB
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
#include "lualib.h" #include "lualib.h"
#if !defined(lua_checkmode)
/* /*
** Check whether 'mode' matches '[rwa]%+?b?'.
** Change this macro to accept other modes for 'fopen' besides ** Change this macro to accept other modes for 'fopen' besides
** the standard ones. ** the standard ones.
*/ */
#define lua_checkmode(mode) \ #if !defined(l_checkmode)
/* accepted extensions to 'mode' in 'fopen' */
#if !defined(L_MODEEXT)
#define L_MODEEXT "b"
#endif
/* Check whether 'mode' matches '[rwa]%+?[L_MODEEXT]*' */
#define l_checkmode(mode) \
(*mode != '\0' && strchr("rwa", *(mode++)) != NULL && \ (*mode != '\0' && strchr("rwa", *(mode++)) != NULL && \
(*mode != '+' || ++mode) && /* skip if char is '+' */ \ (*mode != '+' || (++mode, 1)) && /* skip if char is '+' */ \
(*mode != 'b' || ++mode) && /* skip if char is 'b' */ \ (strspn(mode, L_MODEEXT) == strlen(mode)))
(*mode == '\0'))
#endif #endif
/* /*
** {====================================================== ** {======================================================
** lua_popen spawns a new process connected to the current ** l_popen spawns a new process connected to the current
** one through the file streams. ** one through the file streams.
** ======================================================= ** =======================================================
*/ */
#if !defined(lua_popen) /* { */ #if !defined(l_popen) /* { */
#if defined(LUA_USE_POPEN) /* { */
#define lua_popen(L,c,m) ((void)L, fflush(NULL), popen(c,m)) #if defined(LUA_USE_POSIX) /* { */
#define lua_pclose(L,file) ((void)L, pclose(file))
#elif defined(LUA_WIN) /* }{ */ #define l_popen(L,c,m) (fflush(NULL), popen(c,m))
#define l_pclose(L,file) (pclose(file))
#define lua_popen(L,c,m) ((void)L, _popen(c,m)) #elif defined(LUA_USE_WINDOWS) /* }{ */
#define lua_pclose(L,file) ((void)L, _pclose(file))
#define l_popen(L,c,m) (_popen(c,m))
#define l_pclose(L,file) (_pclose(file))
#else /* }{ */ #else /* }{ */
#define lua_popen(L,c,m) ((void)((void)c, m), \ /* ISO C definitions */
luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0) #define l_popen(L,c,m) \
#define lua_pclose(L,file) ((void)((void)L, file), -1) ((void)((void)c, m), \
luaL_error(L, "'popen' not supported"), \
(FILE*)0)
#define l_pclose(L,file) ((void)L, (void)file, -1)
#endif /* } */ #endif /* } */
#endif /* } */ #endif /* } */
/* }====================================================== */ /* }====================================================== */
#if !defined(l_getc) /* { */
#if defined(LUA_USE_POSIX)
#define l_getc(f) getc_unlocked(f)
#define l_lockfile(f) flockfile(f)
#define l_unlockfile(f) funlockfile(f)
#else
#define l_getc(f) getc(f)
#define l_lockfile(f) ((void)0)
#define l_unlockfile(f) ((void)0)
#endif
#endif /* } */
/* /*
** {====================================================== ** {======================================================
** lua_fseek: configuration for longer offsets ** l_fseek: configuration for longer offsets
** ======================================================= ** =======================================================
*/ */
#if !defined(lua_fseek) && !defined(LUA_ANSI) /* { */ #if !defined(l_fseek) /* { */
#if defined(LUA_USE_POSIX) /* { */ #if defined(LUA_USE_POSIX) /* { */
#include <sys/types.h>
#define l_fseek(f,o,w) fseeko(f,o,w) #define l_fseek(f,o,w) fseeko(f,o,w)
#define l_ftell(f) ftello(f) #define l_ftell(f) ftello(f)
#define l_seeknum off_t #define l_seeknum off_t
#elif defined(LUA_WIN) && !defined(_CRTIMP_TYPEINFO) \ #elif defined(LUA_USE_WINDOWS) && !defined(_CRTIMP_TYPEINFO) \
&& defined(_MSC_VER) && (_MSC_VER >= 1400) /* }{ */ && defined(_MSC_VER) && (_MSC_VER >= 1400) /* }{ */
/* Windows (but not DDK) and Visual C++ 2005 or higher */
/* Windows (but not DDK) and Visual C++ 2005 or higher */
#define l_fseek(f,o,w) _fseeki64(f,o,w) #define l_fseek(f,o,w) _fseeki64(f,o,w)
#define l_ftell(f) _ftelli64(f) #define l_ftell(f) _ftelli64(f)
#define l_seeknum __int64 #define l_seeknum __int64
#endif /* } */ #else /* }{ */
#endif /* } */
#if !defined(l_fseek) /* default definitions */ /* ISO C definitions */
#define l_fseek(f,o,w) fseek(f,o,w) #define l_fseek(f,o,w) fseek(f,o,w)
#define l_ftell(f) ftell(f) #define l_ftell(f) ftell(f)
#define l_seeknum long #define l_seeknum long
#endif
#endif /* } */
#endif /* } */
/* }====================================================== */ /* }====================================================== */
#define IO_PREFIX "_IO_" #define IO_PREFIX "_IO_"
#define IOPREF_LEN (sizeof(IO_PREFIX)/sizeof(char) - 1)
#define IO_INPUT (IO_PREFIX "input") #define IO_INPUT (IO_PREFIX "input")
#define IO_OUTPUT (IO_PREFIX "output") #define IO_OUTPUT (IO_PREFIX "output")
@ -161,9 +180,9 @@ static FILE *tofile (lua_State *L) {
/* /*
** When creating file handles, always creates a `closed' file handle ** When creating file handles, always creates a 'closed' file handle
** before opening the actual file; so, if there is a memory error, the ** before opening the actual file; so, if there is a memory error, the
** file is not left opened. ** handle is in a consistent state.
*/ */
static LStream *newprefile (lua_State *L) { static LStream *newprefile (lua_State *L) {
LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream)); LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream));
@ -173,9 +192,14 @@ static LStream *newprefile (lua_State *L) {
} }
/*
** Calls the 'close' function from a file handle. The 'volatile' avoids
** a bug in some versions of the Clang compiler (e.g., clang 3.0 for
** 32 bits).
*/
static int aux_close (lua_State *L) { static int aux_close (lua_State *L) {
LStream *p = tolstream(L); LStream *p = tolstream(L);
lua_CFunction cf = p->closef; volatile lua_CFunction cf = p->closef;
p->closef = NULL; /* mark stream as closed */ p->closef = NULL; /* mark stream as closed */
return (*cf)(L); /* close it */ return (*cf)(L); /* close it */
} }
@ -219,7 +243,7 @@ static void opencheck (lua_State *L, const char *fname, const char *mode) {
LStream *p = newfile(L); LStream *p = newfile(L);
p->f = fopen(fname, mode); p->f = fopen(fname, mode);
if (p->f == NULL) if (p->f == NULL)
luaL_error(L, "cannot open file " LUA_QS " (%s)", fname, strerror(errno)); luaL_error(L, "cannot open file '%s' (%s)", fname, strerror(errno));
} }
@ -228,7 +252,7 @@ static int io_open (lua_State *L) {
const char *mode = luaL_optstring(L, 2, "r"); const char *mode = luaL_optstring(L, 2, "r");
LStream *p = newfile(L); LStream *p = newfile(L);
const char *md = mode; /* to traverse/check mode */ const char *md = mode; /* to traverse/check mode */
luaL_argcheck(L, lua_checkmode(md), 2, "invalid mode"); luaL_argcheck(L, l_checkmode(md), 2, "invalid mode");
p->f = fopen(filename, mode); p->f = fopen(filename, mode);
return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1; return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
} }
@ -239,7 +263,7 @@ static int io_open (lua_State *L) {
*/ */
static int io_pclose (lua_State *L) { static int io_pclose (lua_State *L) {
LStream *p = tolstream(L); LStream *p = tolstream(L);
return luaL_execresult(L, lua_pclose(L, p->f)); return luaL_execresult(L, l_pclose(L, p->f));
} }
@ -247,7 +271,7 @@ static int io_popen (lua_State *L) {
const char *filename = luaL_checkstring(L, 1); const char *filename = luaL_checkstring(L, 1);
const char *mode = luaL_optstring(L, 2, "r"); const char *mode = luaL_optstring(L, 2, "r");
LStream *p = newprefile(L); LStream *p = newprefile(L);
p->f = lua_popen(L, filename, mode); p->f = l_popen(L, filename, mode);
p->closef = &io_pclose; p->closef = &io_pclose;
return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1; return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
} }
@ -265,7 +289,7 @@ static FILE *getiofile (lua_State *L, const char *findex) {
lua_getfield(L, LUA_REGISTRYINDEX, findex); lua_getfield(L, LUA_REGISTRYINDEX, findex);
p = (LStream *)lua_touserdata(L, -1); p = (LStream *)lua_touserdata(L, -1);
if (isclosed(p)) if (isclosed(p))
luaL_error(L, "standard %s file is closed", findex + strlen(IO_PREFIX)); luaL_error(L, "standard %s file is closed", findex + IOPREF_LEN);
return p->f; return p->f;
} }
@ -300,15 +324,18 @@ static int io_output (lua_State *L) {
static int io_readline (lua_State *L); static int io_readline (lua_State *L);
/*
** maximum number of arguments to 'f:lines'/'io.lines' (it + 3 must fit
** in the limit for upvalues of a closure)
*/
#define MAXARGLINE 250
static void aux_lines (lua_State *L, int toclose) { static void aux_lines (lua_State *L, int toclose) {
int i;
int n = lua_gettop(L) - 1; /* number of arguments to read */ int n = lua_gettop(L) - 1; /* number of arguments to read */
/* ensure that arguments will fit here and into 'io_readline' stack */ luaL_argcheck(L, n <= MAXARGLINE, MAXARGLINE + 2, "too many arguments");
luaL_argcheck(L, n <= LUA_MINSTACK - 3, LUA_MINSTACK - 3, "too many options");
lua_pushvalue(L, 1); /* file handle */
lua_pushinteger(L, n); /* number of arguments to read */ lua_pushinteger(L, n); /* number of arguments to read */
lua_pushboolean(L, toclose); /* close/not close file when finished */ lua_pushboolean(L, toclose); /* close/not close file when finished */
for (i = 1; i <= n; i++) lua_pushvalue(L, i + 1); /* copy arguments */ lua_rotate(L, 2, 2); /* move 'n' and 'toclose' to their positions */
lua_pushcclosure(L, io_readline, 3 + n); lua_pushcclosure(L, io_readline, 3 + n);
} }
@ -347,13 +374,91 @@ static int io_lines (lua_State *L) {
*/ */
static int read_number (lua_State *L, FILE *f) { /* maximum length of a numeral */
lua_Number d; #if !defined (L_MAXLENNUM)
if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) { #define L_MAXLENNUM 200
lua_pushnumber(L, d); #endif
return 1;
/* auxiliary structure used by 'read_number' */
typedef struct {
FILE *f; /* file being read */
int c; /* current character (look ahead) */
int n; /* number of elements in buffer 'buff' */
char buff[L_MAXLENNUM + 1]; /* +1 for ending '\0' */
} RN;
/*
** Add current char to buffer (if not out of space) and read next one
*/
static int nextc (RN *rn) {
if (rn->n >= L_MAXLENNUM) { /* buffer overflow? */
rn->buff[0] = '\0'; /* invalidate result */
return 0; /* fail */
} }
else { else {
rn->buff[rn->n++] = rn->c; /* save current char */
rn->c = l_getc(rn->f); /* read next one */
return 1;
}
}
/*
** Accept current char if it is in 'set' (of size 2)
*/
static int test2 (RN *rn, const char *set) {
if (rn->c == set[0] || rn->c == set[1])
return nextc(rn);
else return 0;
}
/*
** Read a sequence of (hex)digits
*/
static int readdigits (RN *rn, int hex) {
int count = 0;
while ((hex ? isxdigit(rn->c) : isdigit(rn->c)) && nextc(rn))
count++;
return count;
}
/*
** Read a number: first reads a valid prefix of a numeral into a buffer.
** Then it calls 'lua_stringtonumber' to check whether the format is
** correct and to convert it to a Lua number
*/
static int read_number (lua_State *L, FILE *f) {
RN rn;
int count = 0;
int hex = 0;
char decp[2];
rn.f = f; rn.n = 0;
decp[0] = lua_getlocaledecpoint(); /* get decimal point from locale */
decp[1] = '.'; /* always accept a dot */
l_lockfile(rn.f);
do { rn.c = l_getc(rn.f); } while (isspace(rn.c)); /* skip spaces */
test2(&rn, "-+"); /* optional signal */
if (test2(&rn, "00")) {
if (test2(&rn, "xX")) hex = 1; /* numeral is hexadecimal */
else count = 1; /* count initial '0' as a valid digit */
}
count += readdigits(&rn, hex); /* integral part */
if (test2(&rn, decp)) /* decimal point? */
count += readdigits(&rn, hex); /* fractional part */
if (count > 0 && test2(&rn, (hex ? "pP" : "eE"))) { /* exponent mark? */
test2(&rn, "-+"); /* exponent signal */
readdigits(&rn, 0); /* exponent digits */
}
ungetc(rn.c, rn.f); /* unread look-ahead char */
l_unlockfile(rn.f);
rn.buff[rn.n] = '\0'; /* finish string */
if (lua_stringtonumber(L, rn.buff)) /* is this a valid number? */
return 1; /* ok */
else { /* invalid format */
lua_pushnil(L); /* "result" to be removed */ lua_pushnil(L); /* "result" to be removed */
return 0; /* read fails */ return 0; /* read fails */
} }
@ -362,48 +467,42 @@ static int read_number (lua_State *L, FILE *f) {
static int test_eof (lua_State *L, FILE *f) { static int test_eof (lua_State *L, FILE *f) {
int c = getc(f); int c = getc(f);
ungetc(c, f); ungetc(c, f); /* no-op when c == EOF */
lua_pushlstring(L, NULL, 0); lua_pushliteral(L, "");
return (c != EOF); return (c != EOF);
} }
static int read_line (lua_State *L, FILE *f, int chop) { static int read_line (lua_State *L, FILE *f, int chop) {
luaL_Buffer b; luaL_Buffer b;
int c = '\0';
luaL_buffinit(L, &b); luaL_buffinit(L, &b);
for (;;) { while (c != EOF && c != '\n') { /* repeat until end of line */
size_t l; char *buff = luaL_prepbuffer(&b); /* preallocate buffer */
char *p = luaL_prepbuffer(&b); int i = 0;
if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) { /* eof? */ l_lockfile(f); /* no memory errors can happen inside the lock */
luaL_pushresult(&b); /* close buffer */ while (i < LUAL_BUFFERSIZE && (c = l_getc(f)) != EOF && c != '\n')
return (lua_rawlen(L, -1) > 0); /* check whether read something */ buff[i++] = c;
} l_unlockfile(f);
l = strlen(p); luaL_addsize(&b, i);
if (l == 0 || p[l-1] != '\n')
luaL_addsize(&b, l);
else {
luaL_addsize(&b, l - chop); /* chop 'eol' if needed */
luaL_pushresult(&b); /* close buffer */
return 1; /* read at least an `eol' */
}
} }
if (!chop && c == '\n') /* want a newline and have one? */
luaL_addchar(&b, c); /* add ending newline to result */
luaL_pushresult(&b); /* close buffer */
/* return ok if read something (either a newline or something else) */
return (c == '\n' || lua_rawlen(L, -1) > 0);
} }
#define MAX_SIZE_T (~(size_t)0)
static void read_all (lua_State *L, FILE *f) { static void read_all (lua_State *L, FILE *f) {
size_t rlen = LUAL_BUFFERSIZE; /* how much to read in each cycle */ size_t nr;
luaL_Buffer b; luaL_Buffer b;
luaL_buffinit(L, &b); luaL_buffinit(L, &b);
for (;;) { do { /* read file in chunks of LUAL_BUFFERSIZE bytes */
char *p = luaL_prepbuffsize(&b, rlen); char *p = luaL_prepbuffer(&b);
size_t nr = fread(p, sizeof(char), rlen, f); nr = fread(p, sizeof(char), LUAL_BUFFERSIZE, f);
luaL_addsize(&b, nr); luaL_addsize(&b, nr);
if (nr < rlen) break; /* eof? */ } while (nr == LUAL_BUFFERSIZE);
else if (rlen <= (MAX_SIZE_T / 4)) /* avoid buffers too large */
rlen *= 2; /* double buffer size at each iteration */
}
luaL_pushresult(&b); /* close buffer */ luaL_pushresult(&b); /* close buffer */
} }
@ -435,13 +534,13 @@ static int g_read (lua_State *L, FILE *f, int first) {
success = 1; success = 1;
for (n = first; nargs-- && success; n++) { for (n = first; nargs-- && success; n++) {
if (lua_type(L, n) == LUA_TNUMBER) { if (lua_type(L, n) == LUA_TNUMBER) {
size_t l = (size_t)lua_tointeger(L, n); size_t l = (size_t)luaL_checkinteger(L, n);
success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l); success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
} }
else { else {
const char *p = lua_tostring(L, n); const char *p = luaL_checkstring(L, n);
luaL_argcheck(L, p && p[0] == '*', n, "invalid option"); if (*p == '*') p++; /* skip optional '*' (for compatibility) */
switch (p[1]) { switch (*p) {
case 'n': /* number */ case 'n': /* number */
success = read_number(L, f); success = read_number(L, f);
break; break;
@ -488,11 +587,12 @@ static int io_readline (lua_State *L) {
if (isclosed(p)) /* file is already closed? */ if (isclosed(p)) /* file is already closed? */
return luaL_error(L, "file is already closed"); return luaL_error(L, "file is already closed");
lua_settop(L , 1); lua_settop(L , 1);
luaL_checkstack(L, n, "too many arguments");
for (i = 1; i <= n; i++) /* push arguments to 'g_read' */ for (i = 1; i <= n; i++) /* push arguments to 'g_read' */
lua_pushvalue(L, lua_upvalueindex(3 + i)); lua_pushvalue(L, lua_upvalueindex(3 + i));
n = g_read(L, p->f, 2); /* 'n' is number of results */ n = g_read(L, p->f, 2); /* 'n' is number of results */
lua_assert(n > 0); /* should return at least a nil */ lua_assert(n > 0); /* should return at least a nil */
if (!lua_isnil(L, -n)) /* read at least one value? */ if (lua_toboolean(L, -n)) /* read at least one value? */
return n; /* return them */ return n; /* return them */
else { /* first result is nil: EOF or error */ else { /* first result is nil: EOF or error */
if (n > 1) { /* is there error information? */ if (n > 1) { /* is there error information? */
@ -517,8 +617,10 @@ static int g_write (lua_State *L, FILE *f, int arg) {
for (; nargs--; arg++) { for (; nargs--; arg++) {
if (lua_type(L, arg) == LUA_TNUMBER) { if (lua_type(L, arg) == LUA_TNUMBER) {
/* optimization: could be done exactly as for strings */ /* optimization: could be done exactly as for strings */
status = status && int len = lua_isinteger(L, arg)
fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0; ? fprintf(f, LUA_INTEGER_FMT, lua_tointeger(L, arg))
: fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg));
status = status && (len > 0);
} }
else { else {
size_t l; size_t l;
@ -548,15 +650,15 @@ static int f_seek (lua_State *L) {
static const char *const modenames[] = {"set", "cur", "end", NULL}; static const char *const modenames[] = {"set", "cur", "end", NULL};
FILE *f = tofile(L); FILE *f = tofile(L);
int op = luaL_checkoption(L, 2, "cur", modenames); int op = luaL_checkoption(L, 2, "cur", modenames);
lua_Number p3 = luaL_optnumber(L, 3, 0); lua_Integer p3 = luaL_optinteger(L, 3, 0);
l_seeknum offset = (l_seeknum)p3; l_seeknum offset = (l_seeknum)p3;
luaL_argcheck(L, (lua_Number)offset == p3, 3, luaL_argcheck(L, (lua_Integer)offset == p3, 3,
"not an integer in proper range"); "not an integer in proper range");
op = l_fseek(f, offset, mode[op]); op = l_fseek(f, offset, mode[op]);
if (op) if (op)
return luaL_fileresult(L, 0, NULL); /* error */ return luaL_fileresult(L, 0, NULL); /* error */
else { else {
lua_pushnumber(L, (lua_Number)l_ftell(f)); lua_pushinteger(L, (lua_Integer)l_ftell(f));
return 1; return 1;
} }
} }
@ -568,7 +670,7 @@ static int f_setvbuf (lua_State *L) {
FILE *f = tofile(L); FILE *f = tofile(L);
int op = luaL_checkoption(L, 2, NULL, modenames); int op = luaL_checkoption(L, 2, NULL, modenames);
lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE); lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
int res = setvbuf(f, NULL, mode[op], sz); int res = setvbuf(f, NULL, mode[op], (size_t)sz);
return luaL_fileresult(L, res == 0, NULL); return luaL_fileresult(L, res == 0, NULL);
} }

@ -1,20 +1,24 @@
/* /*
** $Id: llex.c,v 2.63.1.2 2013/08/30 15:49:41 roberto Exp $ ** $Id: llex.c,v 2.96 2016/05/02 14:02:12 roberto Exp $
** Lexical Analyzer ** Lexical Analyzer
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define llex_c
#define LUA_CORE
#include "lprefix.h"
#include <locale.h> #include <locale.h>
#include <string.h> #include <string.h>
#define llex_c
#define LUA_CORE
#include "lua.h" #include "lua.h"
#include "lctype.h" #include "lctype.h"
#include "ldebug.h"
#include "ldo.h" #include "ldo.h"
#include "lgc.h"
#include "llex.h" #include "llex.h"
#include "lobject.h" #include "lobject.h"
#include "lparser.h" #include "lparser.h"
@ -38,8 +42,9 @@ static const char *const luaX_tokens [] = {
"end", "false", "for", "function", "goto", "if", "end", "false", "for", "function", "goto", "if",
"in", "local", "nil", "not", "or", "repeat", "in", "local", "nil", "not", "or", "repeat",
"return", "then", "true", "until", "while", "return", "then", "true", "until", "while",
"..", "...", "==", ">=", "<=", "~=", "::", "<eof>", "//", "..", "...", "==", ">=", "<=", "~=",
"<number>", "<name>", "<string>" "<<", ">>", "::", "<eof>",
"<number>", "<integer>", "<name>", "<string>"
}; };
@ -53,7 +58,7 @@ static void save (LexState *ls, int c) {
Mbuffer *b = ls->buff; Mbuffer *b = ls->buff;
if (luaZ_bufflen(b) + 1 > luaZ_sizebuffer(b)) { if (luaZ_bufflen(b) + 1 > luaZ_sizebuffer(b)) {
size_t newsize; size_t newsize;
if (luaZ_sizebuffer(b) >= MAX_SIZET/2) if (luaZ_sizebuffer(b) >= MAX_SIZE/2)
lexerror(ls, "lexical element too long", 0); lexerror(ls, "lexical element too long", 0);
newsize = luaZ_sizebuffer(b) * 2; newsize = luaZ_sizebuffer(b) * 2;
luaZ_resizebuffer(ls->L, b, newsize); luaZ_resizebuffer(ls->L, b, newsize);
@ -64,24 +69,25 @@ static void save (LexState *ls, int c) {
void luaX_init (lua_State *L) { void luaX_init (lua_State *L) {
int i; int i;
TString *e = luaS_newliteral(L, LUA_ENV); /* create env name */
luaC_fix(L, obj2gco(e)); /* never collect this name */
for (i=0; i<NUM_RESERVED; i++) { for (i=0; i<NUM_RESERVED; i++) {
TString *ts = luaS_new(L, luaX_tokens[i]); TString *ts = luaS_new(L, luaX_tokens[i]);
luaS_fix(ts); /* reserved words are never collected */ luaC_fix(L, obj2gco(ts)); /* reserved words are never collected */
ts->tsv.extra = cast_byte(i+1); /* reserved word */ ts->extra = cast_byte(i+1); /* reserved word */
} }
} }
const char *luaX_token2str (LexState *ls, int token) { const char *luaX_token2str (LexState *ls, int token) {
if (token < FIRST_RESERVED) { /* single-byte symbols? */ if (token < FIRST_RESERVED) { /* single-byte symbols? */
lua_assert(token == cast(unsigned char, token)); lua_assert(token == cast_uchar(token));
return (lisprint(token)) ? luaO_pushfstring(ls->L, LUA_QL("%c"), token) : return luaO_pushfstring(ls->L, "'%c'", token);
luaO_pushfstring(ls->L, "char(%d)", token);
} }
else { else {
const char *s = luaX_tokens[token - FIRST_RESERVED]; const char *s = luaX_tokens[token - FIRST_RESERVED];
if (token < TK_EOS) /* fixed format (symbols and reserved words)? */ if (token < TK_EOS) /* fixed format (symbols and reserved words)? */
return luaO_pushfstring(ls->L, LUA_QS, s); return luaO_pushfstring(ls->L, "'%s'", s);
else /* names, strings, and numerals */ else /* names, strings, and numerals */
return s; return s;
} }
@ -90,11 +96,10 @@ const char *luaX_token2str (LexState *ls, int token) {
static const char *txtToken (LexState *ls, int token) { static const char *txtToken (LexState *ls, int token) {
switch (token) { switch (token) {
case TK_NAME: case TK_NAME: case TK_STRING:
case TK_STRING: case TK_FLT: case TK_INT:
case TK_NUMBER:
save(ls, '\0'); save(ls, '\0');
return luaO_pushfstring(ls->L, LUA_QS, luaZ_buffer(ls->buff)); return luaO_pushfstring(ls->L, "'%s'", luaZ_buffer(ls->buff));
default: default:
return luaX_token2str(ls, token); return luaX_token2str(ls, token);
} }
@ -102,9 +107,7 @@ static const char *txtToken (LexState *ls, int token) {
static l_noret lexerror (LexState *ls, const char *msg, int token) { static l_noret lexerror (LexState *ls, const char *msg, int token) {
char buff[LUA_IDSIZE]; msg = luaG_addinfo(ls->L, msg, ls->source, ls->linenumber);
luaO_chunkid(buff, getstr(ls->source), LUA_IDSIZE);
msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg);
if (token) if (token)
luaO_pushfstring(ls->L, "%s near %s", msg, txtToken(ls, token)); luaO_pushfstring(ls->L, "%s near %s", msg, txtToken(ls, token));
luaD_throw(ls->L, LUA_ERRSYNTAX); luaD_throw(ls->L, LUA_ERRSYNTAX);
@ -117,24 +120,24 @@ l_noret luaX_syntaxerror (LexState *ls, const char *msg) {
/* /*
** creates a new string and anchors it in function's table so that ** creates a new string and anchors it in scanner's table so that
** it will not be collected until the end of the function's compilation ** it will not be collected until the end of the compilation
** (by that time it should be anchored in function's prototype) ** (by that time it should be anchored somewhere)
*/ */
TString *luaX_newstring (LexState *ls, const char *str, size_t l) { TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
lua_State *L = ls->L; lua_State *L = ls->L;
TValue *o; /* entry for `str' */ TValue *o; /* entry for 'str' */
TString *ts = luaS_newlstr(L, str, l); /* create new string */ TString *ts = luaS_newlstr(L, str, l); /* create new string */
setsvalue2s(L, L->top++, ts); /* temporarily anchor it in stack */ setsvalue2s(L, L->top++, ts); /* temporarily anchor it in stack */
o = luaH_set(L, ls->fs->h, L->top - 1); o = luaH_set(L, ls->h, L->top - 1);
if (ttisnil(o)) { /* not in use yet? (see 'addK') */ if (ttisnil(o)) { /* not in use yet? */
/* boolean value does not need GC barrier; /* boolean value does not need GC barrier;
table has no metatable, so it does not need to invalidate cache */ table has no metatable, so it does not need to invalidate cache */
setbvalue(o, 1); /* t[string] = true */ setbvalue(o, 1); /* t[string] = true */
luaC_checkGC(L); luaC_checkGC(L);
} }
else { /* string already present */ else { /* string already present */
ts = rawtsvalue(keyfromval(o)); /* re-use value previously stored */ ts = tsvalue(keyfromval(o)); /* re-use value previously stored */
} }
L->top--; /* remove string from stack */ L->top--; /* remove string from stack */
return ts; return ts;
@ -148,17 +151,17 @@ TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
static void inclinenumber (LexState *ls) { static void inclinenumber (LexState *ls) {
int old = ls->current; int old = ls->current;
lua_assert(currIsNewline(ls)); lua_assert(currIsNewline(ls));
next(ls); /* skip `\n' or `\r' */ next(ls); /* skip '\n' or '\r' */
if (currIsNewline(ls) && ls->current != old) if (currIsNewline(ls) && ls->current != old)
next(ls); /* skip `\n\r' or `\r\n' */ next(ls); /* skip '\n\r' or '\r\n' */
if (++ls->linenumber >= MAX_INT) if (++ls->linenumber >= MAX_INT)
luaX_syntaxerror(ls, "chunk has too many lines"); lexerror(ls, "chunk has too many lines", 0);
} }
void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source, void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
int firstchar) { int firstchar) {
ls->decpoint = '.'; ls->t.token = 0;
ls->L = L; ls->L = L;
ls->current = firstchar; ls->current = firstchar;
ls->lookahead.token = TK_EOS; /* no look-ahead token */ ls->lookahead.token = TK_EOS; /* no look-ahead token */
@ -167,8 +170,7 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
ls->linenumber = 1; ls->linenumber = 1;
ls->lastline = 1; ls->lastline = 1;
ls->source = source; ls->source = source;
ls->envn = luaS_new(L, LUA_ENV); /* create env name */ ls->envn = luaS_newliteral(L, LUA_ENV); /* get env name */
luaS_fix(ls->envn); /* never collect this name */
luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER); /* initialize buffer */ luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER); /* initialize buffer */
} }
@ -181,78 +183,70 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
*/ */
static int check_next1 (LexState *ls, int c) {
static int check_next (LexState *ls, const char *set) { if (ls->current == c) {
if (ls->current == '\0' || !strchr(set, ls->current)) next(ls);
return 0; return 1;
save_and_next(ls); }
return 1; else return 0;
}
/*
** change all characters 'from' in buffer to 'to'
*/
static void buffreplace (LexState *ls, char from, char to) {
size_t n = luaZ_bufflen(ls->buff);
char *p = luaZ_buffer(ls->buff);
while (n--)
if (p[n] == from) p[n] = to;
} }
#if !defined(getlocaledecpoint)
#define getlocaledecpoint() (localeconv()->decimal_point[0])
#endif
#define buff2d(b,e) luaO_str2d(luaZ_buffer(b), luaZ_bufflen(b) - 1, e)
/* /*
** in case of format error, try to change decimal point separator to ** Check whether current char is in set 'set' (with two chars) and
** the one defined in the current locale and check again ** saves it
*/ */
static void trydecpoint (LexState *ls, SemInfo *seminfo) { static int check_next2 (LexState *ls, const char *set) {
char old = ls->decpoint; lua_assert(set[2] == '\0');
ls->decpoint = getlocaledecpoint(); if (ls->current == set[0] || ls->current == set[1]) {
buffreplace(ls, old, ls->decpoint); /* try new decimal separator */ save_and_next(ls);
if (!buff2d(ls->buff, &seminfo->r)) { return 1;
/* format error with correct decimal point: no more options */
buffreplace(ls, ls->decpoint, '.'); /* undo change (for error message) */
lexerror(ls, "malformed number", TK_NUMBER);
} }
else return 0;
} }
/* LUA_NUMBER */ /* LUA_NUMBER */
/* /*
** this function is quite liberal in what it accepts, as 'luaO_str2d' ** this function is quite liberal in what it accepts, as 'luaO_str2num'
** will reject ill-formed numerals. ** will reject ill-formed numerals.
*/ */
static void read_numeral (LexState *ls, SemInfo *seminfo) { static int read_numeral (LexState *ls, SemInfo *seminfo) {
TValue obj;
const char *expo = "Ee"; const char *expo = "Ee";
int first = ls->current; int first = ls->current;
lua_assert(lisdigit(ls->current)); lua_assert(lisdigit(ls->current));
save_and_next(ls); save_and_next(ls);
if (first == '0' && check_next(ls, "Xx")) /* hexadecimal? */ if (first == '0' && check_next2(ls, "xX")) /* hexadecimal? */
expo = "Pp"; expo = "Pp";
for (;;) { for (;;) {
if (check_next(ls, expo)) /* exponent part? */ if (check_next2(ls, expo)) /* exponent part? */
check_next(ls, "+-"); /* optional exponent sign */ check_next2(ls, "-+"); /* optional exponent sign */
if (lisxdigit(ls->current) || ls->current == '.') if (lisxdigit(ls->current))
save_and_next(ls);
else if (ls->current == '.')
save_and_next(ls); save_and_next(ls);
else break; else break;
} }
save(ls, '\0'); save(ls, '\0');
buffreplace(ls, '.', ls->decpoint); /* follow locale for decimal point */ if (luaO_str2num(luaZ_buffer(ls->buff), &obj) == 0) /* format error? */
if (!buff2d(ls->buff, &seminfo->r)) /* format error? */ lexerror(ls, "malformed number", TK_FLT);
trydecpoint(ls, seminfo); /* try to update decimal point separator */ if (ttisinteger(&obj)) {
seminfo->i = ivalue(&obj);
return TK_INT;
}
else {
lua_assert(ttisfloat(&obj));
seminfo->r = fltvalue(&obj);
return TK_FLT;
}
} }
/* /*
** skip a sequence '[=*[' or ']=*]' and return its number of '='s or ** skip a sequence '[=*[' or ']=*]'; if sequence is well formed, return
** -1 if sequence is malformed ** its number of '='s; otherwise, return a negative number (-1 iff there
** are no '='s after initial bracket)
*/ */
static int skip_sep (LexState *ls) { static int skip_sep (LexState *ls) {
int count = 0; int count = 0;
@ -268,18 +262,22 @@ static int skip_sep (LexState *ls) {
static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) { static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
save_and_next(ls); /* skip 2nd `[' */ int line = ls->linenumber; /* initial line (for error message) */
save_and_next(ls); /* skip 2nd '[' */
if (currIsNewline(ls)) /* string starts with a newline? */ if (currIsNewline(ls)) /* string starts with a newline? */
inclinenumber(ls); /* skip it */ inclinenumber(ls); /* skip it */
for (;;) { for (;;) {
switch (ls->current) { switch (ls->current) {
case EOZ: case EOZ: { /* error */
lexerror(ls, (seminfo) ? "unfinished long string" : const char *what = (seminfo ? "string" : "comment");
"unfinished long comment", TK_EOS); const char *msg = luaO_pushfstring(ls->L,
"unfinished long %s (starting at line %d)", what, line);
lexerror(ls, msg, TK_EOS);
break; /* to avoid warnings */ break; /* to avoid warnings */
}
case ']': { case ']': {
if (skip_sep(ls) == sep) { if (skip_sep(ls) == sep) {
save_and_next(ls); /* skip 2nd `]' */ save_and_next(ls); /* skip 2nd ']' */
goto endloop; goto endloop;
} }
break; break;
@ -302,40 +300,65 @@ static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
} }
static void escerror (LexState *ls, int *c, int n, const char *msg) { static void esccheck (LexState *ls, int c, const char *msg) {
int i; if (!c) {
luaZ_resetbuffer(ls->buff); /* prepare error message */ if (ls->current != EOZ)
save(ls, '\\'); save_and_next(ls); /* add current to buffer for error message */
for (i = 0; i < n && c[i] != EOZ; i++) lexerror(ls, msg, TK_STRING);
save(ls, c[i]); }
lexerror(ls, msg, TK_STRING); }
static int gethexa (LexState *ls) {
save_and_next(ls);
esccheck (ls, lisxdigit(ls->current), "hexadecimal digit expected");
return luaO_hexavalue(ls->current);
} }
static int readhexaesc (LexState *ls) { static int readhexaesc (LexState *ls) {
int c[3], i; /* keep input for error message */ int r = gethexa(ls);
int r = 0; /* result accumulator */ r = (r << 4) + gethexa(ls);
c[0] = 'x'; /* for error message */ luaZ_buffremove(ls->buff, 2); /* remove saved chars from buffer */
for (i = 1; i < 3; i++) { /* read two hexadecimal digits */ return r;
c[i] = next(ls); }
if (!lisxdigit(c[i]))
escerror(ls, c, i + 1, "hexadecimal digit expected");
r = (r << 4) + luaO_hexavalue(c[i]); static unsigned long readutf8esc (LexState *ls) {
unsigned long r;
int i = 4; /* chars to be removed: '\', 'u', '{', and first digit */
save_and_next(ls); /* skip 'u' */
esccheck(ls, ls->current == '{', "missing '{'");
r = gethexa(ls); /* must have at least one digit */
while ((save_and_next(ls), lisxdigit(ls->current))) {
i++;
r = (r << 4) + luaO_hexavalue(ls->current);
esccheck(ls, r <= 0x10FFFF, "UTF-8 value too large");
} }
esccheck(ls, ls->current == '}', "missing '}'");
next(ls); /* skip '}' */
luaZ_buffremove(ls->buff, i); /* remove saved chars from buffer */
return r; return r;
} }
static void utf8esc (LexState *ls) {
char buff[UTF8BUFFSZ];
int n = luaO_utf8esc(buff, readutf8esc(ls));
for (; n > 0; n--) /* add 'buff' to string */
save(ls, buff[UTF8BUFFSZ - n]);
}
static int readdecesc (LexState *ls) { static int readdecesc (LexState *ls) {
int c[3], i; int i;
int r = 0; /* result accumulator */ int r = 0; /* result accumulator */
for (i = 0; i < 3 && lisdigit(ls->current); i++) { /* read up to 3 digits */ for (i = 0; i < 3 && lisdigit(ls->current); i++) { /* read up to 3 digits */
c[i] = ls->current; r = 10*r + ls->current - '0';
r = 10*r + c[i] - '0'; save_and_next(ls);
next(ls);
} }
if (r > UCHAR_MAX) esccheck(ls, r <= UCHAR_MAX, "decimal escape too large");
escerror(ls, c, i, "decimal escape too large"); luaZ_buffremove(ls->buff, i); /* remove read digits from buffer */
return r; return r;
} }
@ -353,7 +376,7 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
break; /* to avoid warnings */ break; /* to avoid warnings */
case '\\': { /* escape sequences */ case '\\': { /* escape sequences */
int c; /* final character to be saved */ int c; /* final character to be saved */
next(ls); /* do not save the `\' */ save_and_next(ls); /* keep '\\' for error messages */
switch (ls->current) { switch (ls->current) {
case 'a': c = '\a'; goto read_save; case 'a': c = '\a'; goto read_save;
case 'b': c = '\b'; goto read_save; case 'b': c = '\b'; goto read_save;
@ -363,12 +386,14 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
case 't': c = '\t'; goto read_save; case 't': c = '\t'; goto read_save;
case 'v': c = '\v'; goto read_save; case 'v': c = '\v'; goto read_save;
case 'x': c = readhexaesc(ls); goto read_save; case 'x': c = readhexaesc(ls); goto read_save;
case 'u': utf8esc(ls); goto no_save;
case '\n': case '\r': case '\n': case '\r':
inclinenumber(ls); c = '\n'; goto only_save; inclinenumber(ls); c = '\n'; goto only_save;
case '\\': case '\"': case '\'': case '\\': case '\"': case '\'':
c = ls->current; goto read_save; c = ls->current; goto read_save;
case EOZ: goto no_save; /* will raise an error next loop */ case EOZ: goto no_save; /* will raise an error next loop */
case 'z': { /* zap following span of spaces */ case 'z': { /* zap following span of spaces */
luaZ_buffremove(ls->buff, 1); /* remove '\\' */
next(ls); /* skip the 'z' */ next(ls); /* skip the 'z' */
while (lisspace(ls->current)) { while (lisspace(ls->current)) {
if (currIsNewline(ls)) inclinenumber(ls); if (currIsNewline(ls)) inclinenumber(ls);
@ -377,15 +402,18 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
goto no_save; goto no_save;
} }
default: { default: {
if (!lisdigit(ls->current)) esccheck(ls, lisdigit(ls->current), "invalid escape sequence");
escerror(ls, &ls->current, 1, "invalid escape sequence"); c = readdecesc(ls); /* digital escape '\ddd' */
/* digital escape \ddd */
c = readdecesc(ls);
goto only_save; goto only_save;
} }
} }
read_save: next(ls); /* read next character */ read_save:
only_save: save(ls, c); /* save 'c' */ next(ls);
/* go through */
only_save:
luaZ_buffremove(ls->buff, 1); /* remove '\\' */
save(ls, c);
/* go through */
no_save: break; no_save: break;
} }
default: default:
@ -417,7 +445,7 @@ static int llex (LexState *ls, SemInfo *seminfo) {
next(ls); next(ls);
if (ls->current == '[') { /* long comment? */ if (ls->current == '[') { /* long comment? */
int sep = skip_sep(ls); int sep = skip_sep(ls);
luaZ_resetbuffer(ls->buff); /* `skip_sep' may dirty the buffer */ luaZ_resetbuffer(ls->buff); /* 'skip_sep' may dirty the buffer */
if (sep >= 0) { if (sep >= 0) {
read_long_string(ls, NULL, sep); /* skip long comment */ read_long_string(ls, NULL, sep); /* skip long comment */
luaZ_resetbuffer(ls->buff); /* previous call may dirty the buff. */ luaZ_resetbuffer(ls->buff); /* previous call may dirty the buff. */
@ -435,33 +463,41 @@ static int llex (LexState *ls, SemInfo *seminfo) {
read_long_string(ls, seminfo, sep); read_long_string(ls, seminfo, sep);
return TK_STRING; return TK_STRING;
} }
else if (sep == -1) return '['; else if (sep != -1) /* '[=...' missing second bracket */
else lexerror(ls, "invalid long string delimiter", TK_STRING); lexerror(ls, "invalid long string delimiter", TK_STRING);
return '[';
} }
case '=': { case '=': {
next(ls); next(ls);
if (ls->current != '=') return '='; if (check_next1(ls, '=')) return TK_EQ;
else { next(ls); return TK_EQ; } else return '=';
} }
case '<': { case '<': {
next(ls); next(ls);
if (ls->current != '=') return '<'; if (check_next1(ls, '=')) return TK_LE;
else { next(ls); return TK_LE; } else if (check_next1(ls, '<')) return TK_SHL;
else return '<';
} }
case '>': { case '>': {
next(ls); next(ls);
if (ls->current != '=') return '>'; if (check_next1(ls, '=')) return TK_GE;
else { next(ls); return TK_GE; } else if (check_next1(ls, '>')) return TK_SHR;
else return '>';
}
case '/': {
next(ls);
if (check_next1(ls, '/')) return TK_IDIV;
else return '/';
} }
case '~': { case '~': {
next(ls); next(ls);
if (ls->current != '=') return '~'; if (check_next1(ls, '=')) return TK_NE;
else { next(ls); return TK_NE; } else return '~';
} }
case ':': { case ':': {
next(ls); next(ls);
if (ls->current != ':') return ':'; if (check_next1(ls, ':')) return TK_DBCOLON;
else { next(ls); return TK_DBCOLON; } else return ':';
} }
case '"': case '\'': { /* short literal strings */ case '"': case '\'': { /* short literal strings */
read_string(ls, ls->current, seminfo); read_string(ls, ls->current, seminfo);
@ -469,18 +505,17 @@ static int llex (LexState *ls, SemInfo *seminfo) {
} }
case '.': { /* '.', '..', '...', or number */ case '.': { /* '.', '..', '...', or number */
save_and_next(ls); save_and_next(ls);
if (check_next(ls, ".")) { if (check_next1(ls, '.')) {
if (check_next(ls, ".")) if (check_next1(ls, '.'))
return TK_DOTS; /* '...' */ return TK_DOTS; /* '...' */
else return TK_CONCAT; /* '..' */ else return TK_CONCAT; /* '..' */
} }
else if (!lisdigit(ls->current)) return '.'; else if (!lisdigit(ls->current)) return '.';
/* else go through */ else return read_numeral(ls, seminfo);
} }
case '0': case '1': case '2': case '3': case '4': case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': { case '5': case '6': case '7': case '8': case '9': {
read_numeral(ls, seminfo); return read_numeral(ls, seminfo);
return TK_NUMBER;
} }
case EOZ: { case EOZ: {
return TK_EOS; return TK_EOS;
@ -495,7 +530,7 @@ static int llex (LexState *ls, SemInfo *seminfo) {
luaZ_bufflen(ls->buff)); luaZ_bufflen(ls->buff));
seminfo->ts = ts; seminfo->ts = ts;
if (isreserved(ts)) /* reserved word? */ if (isreserved(ts)) /* reserved word? */
return ts->tsv.extra - 1 + FIRST_RESERVED; return ts->extra - 1 + FIRST_RESERVED;
else { else {
return TK_NAME; return TK_NAME;
} }

@ -1,16 +1,18 @@
/* /*
** $Id: lmathlib.c,v 1.83.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lmathlib.c,v 1.117 2015/10/02 15:39:23 roberto Exp $
** Standard mathematical library ** Standard mathematical library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define lmathlib_c
#define LUA_LIB
#include "lprefix.h"
#include <stdlib.h> #include <stdlib.h>
#include <math.h> #include <math.h>
#define lmathlib_c
#define LUA_LIB
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
@ -18,13 +20,30 @@
#undef PI #undef PI
#define PI ((lua_Number)(3.1415926535897932384626433832795)) #define PI (l_mathop(3.141592653589793238462643383279502884))
#define RADIANS_PER_DEGREE ((lua_Number)(PI/180.0))
#if !defined(l_rand) /* { */
#if defined(LUA_USE_POSIX)
#define l_rand() random()
#define l_srand(x) srandom(x)
#define L_RANDMAX 2147483647 /* (2^31 - 1), following POSIX */
#else
#define l_rand() rand()
#define l_srand(x) srand(x)
#define L_RANDMAX RAND_MAX
#endif
#endif /* } */
static int math_abs (lua_State *L) { static int math_abs (lua_State *L) {
lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1))); if (lua_isinteger(L, 1)) {
lua_Integer n = lua_tointeger(L, 1);
if (n < 0) n = (lua_Integer)(0u - (lua_Unsigned)n);
lua_pushinteger(L, n);
}
else
lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
@ -33,31 +52,16 @@ static int math_sin (lua_State *L) {
return 1; return 1;
} }
static int math_sinh (lua_State *L) {
lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_cos (lua_State *L) { static int math_cos (lua_State *L) {
lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_cosh (lua_State *L) {
lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_tan (lua_State *L) { static int math_tan (lua_State *L) {
lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_tanh (lua_State *L) {
lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_asin (lua_State *L) { static int math_asin (lua_State *L) {
lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
return 1; return 1;
@ -69,49 +73,106 @@ static int math_acos (lua_State *L) {
} }
static int math_atan (lua_State *L) { static int math_atan (lua_State *L) {
lua_pushnumber(L, l_mathop(atan)(luaL_checknumber(L, 1))); lua_Number y = luaL_checknumber(L, 1);
lua_Number x = luaL_optnumber(L, 2, 1);
lua_pushnumber(L, l_mathop(atan2)(y, x));
return 1; return 1;
} }
static int math_atan2 (lua_State *L) {
lua_pushnumber(L, l_mathop(atan2)(luaL_checknumber(L, 1), static int math_toint (lua_State *L) {
luaL_checknumber(L, 2))); int valid;
lua_Integer n = lua_tointegerx(L, 1, &valid);
if (valid)
lua_pushinteger(L, n);
else {
luaL_checkany(L, 1);
lua_pushnil(L); /* value is not convertible to integer */
}
return 1; return 1;
} }
static int math_ceil (lua_State *L) {
lua_pushnumber(L, l_mathop(ceil)(luaL_checknumber(L, 1))); static void pushnumint (lua_State *L, lua_Number d) {
return 1; lua_Integer n;
if (lua_numbertointeger(d, &n)) /* does 'd' fit in an integer? */
lua_pushinteger(L, n); /* result is integer */
else
lua_pushnumber(L, d); /* result is float */
} }
static int math_floor (lua_State *L) { static int math_floor (lua_State *L) {
lua_pushnumber(L, l_mathop(floor)(luaL_checknumber(L, 1))); if (lua_isinteger(L, 1))
lua_settop(L, 1); /* integer is its own floor */
else {
lua_Number d = l_mathop(floor)(luaL_checknumber(L, 1));
pushnumint(L, d);
}
return 1;
}
static int math_ceil (lua_State *L) {
if (lua_isinteger(L, 1))
lua_settop(L, 1); /* integer is its own ceil */
else {
lua_Number d = l_mathop(ceil)(luaL_checknumber(L, 1));
pushnumint(L, d);
}
return 1; return 1;
} }
static int math_fmod (lua_State *L) { static int math_fmod (lua_State *L) {
lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1), if (lua_isinteger(L, 1) && lua_isinteger(L, 2)) {
luaL_checknumber(L, 2))); lua_Integer d = lua_tointeger(L, 2);
if ((lua_Unsigned)d + 1u <= 1u) { /* special cases: -1 or 0 */
luaL_argcheck(L, d != 0, 2, "zero");
lua_pushinteger(L, 0); /* avoid overflow with 0x80000... / -1 */
}
else
lua_pushinteger(L, lua_tointeger(L, 1) % d);
}
else
lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
luaL_checknumber(L, 2)));
return 1; return 1;
} }
/*
** next function does not use 'modf', avoiding problems with 'double*'
** (which is not compatible with 'float*') when lua_Number is not
** 'double'.
*/
static int math_modf (lua_State *L) { static int math_modf (lua_State *L) {
lua_Number ip; if (lua_isinteger(L ,1)) {
lua_Number fp = l_mathop(modf)(luaL_checknumber(L, 1), &ip); lua_settop(L, 1); /* number is its own integer part */
lua_pushnumber(L, ip); lua_pushnumber(L, 0); /* no fractional part */
lua_pushnumber(L, fp); }
else {
lua_Number n = luaL_checknumber(L, 1);
/* integer part (rounds toward zero) */
lua_Number ip = (n < 0) ? l_mathop(ceil)(n) : l_mathop(floor)(n);
pushnumint(L, ip);
/* fractional part (test needed for inf/-inf) */
lua_pushnumber(L, (n == ip) ? l_mathop(0.0) : (n - ip));
}
return 2; return 2;
} }
static int math_sqrt (lua_State *L) { static int math_sqrt (lua_State *L) {
lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_pow (lua_State *L) {
lua_Number x = luaL_checknumber(L, 1); static int math_ult (lua_State *L) {
lua_Number y = luaL_checknumber(L, 2); lua_Integer a = luaL_checkinteger(L, 1);
lua_pushnumber(L, l_mathop(pow)(x, y)); lua_Integer b = luaL_checkinteger(L, 2);
lua_pushboolean(L, (lua_Unsigned)a < (lua_Unsigned)b);
return 1; return 1;
} }
@ -122,145 +183,208 @@ static int math_log (lua_State *L) {
res = l_mathop(log)(x); res = l_mathop(log)(x);
else { else {
lua_Number base = luaL_checknumber(L, 2); lua_Number base = luaL_checknumber(L, 2);
if (base == (lua_Number)10.0) res = l_mathop(log10)(x); #if !defined(LUA_USE_C89)
if (base == 2.0) res = l_mathop(log2)(x); else
#endif
if (base == 10.0) res = l_mathop(log10)(x);
else res = l_mathop(log)(x)/l_mathop(log)(base); else res = l_mathop(log)(x)/l_mathop(log)(base);
} }
lua_pushnumber(L, res); lua_pushnumber(L, res);
return 1; return 1;
} }
#if defined(LUA_COMPAT_LOG10)
static int math_log10 (lua_State *L) {
lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
return 1;
}
#endif
static int math_exp (lua_State *L) { static int math_exp (lua_State *L) {
lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_deg (lua_State *L) { static int math_deg (lua_State *L) {
lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE); lua_pushnumber(L, luaL_checknumber(L, 1) * (l_mathop(180.0) / PI));
return 1; return 1;
} }
static int math_rad (lua_State *L) { static int math_rad (lua_State *L) {
lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE); lua_pushnumber(L, luaL_checknumber(L, 1) * (PI / l_mathop(180.0)));
return 1;
}
static int math_frexp (lua_State *L) {
int e;
lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));
lua_pushinteger(L, e);
return 2;
}
static int math_ldexp (lua_State *L) {
lua_Number x = luaL_checknumber(L, 1);
int ep = luaL_checkint(L, 2);
lua_pushnumber(L, l_mathop(ldexp)(x, ep));
return 1; return 1;
} }
static int math_min (lua_State *L) { static int math_min (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */ int n = lua_gettop(L); /* number of arguments */
lua_Number dmin = luaL_checknumber(L, 1); int imin = 1; /* index of current minimum value */
int i; int i;
for (i=2; i<=n; i++) { luaL_argcheck(L, n >= 1, 1, "value expected");
lua_Number d = luaL_checknumber(L, i); for (i = 2; i <= n; i++) {
if (d < dmin) if (lua_compare(L, i, imin, LUA_OPLT))
dmin = d; imin = i;
} }
lua_pushnumber(L, dmin); lua_pushvalue(L, imin);
return 1; return 1;
} }
static int math_max (lua_State *L) { static int math_max (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */ int n = lua_gettop(L); /* number of arguments */
lua_Number dmax = luaL_checknumber(L, 1); int imax = 1; /* index of current maximum value */
int i; int i;
for (i=2; i<=n; i++) { luaL_argcheck(L, n >= 1, 1, "value expected");
lua_Number d = luaL_checknumber(L, i); for (i = 2; i <= n; i++) {
if (d > dmax) if (lua_compare(L, imax, i, LUA_OPLT))
dmax = d; imax = i;
} }
lua_pushnumber(L, dmax); lua_pushvalue(L, imax);
return 1; return 1;
} }
/*
** This function uses 'double' (instead of 'lua_Number') to ensure that
** all bits from 'l_rand' can be represented, and that 'RANDMAX + 1.0'
** will keep full precision (ensuring that 'r' is always less than 1.0.)
*/
static int math_random (lua_State *L) { static int math_random (lua_State *L) {
/* the `%' avoids the (rare) case of r==1, and is needed also because on lua_Integer low, up;
some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */ double r = (double)l_rand() * (1.0 / ((double)L_RANDMAX + 1.0));
lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;
switch (lua_gettop(L)) { /* check number of arguments */ switch (lua_gettop(L)) { /* check number of arguments */
case 0: { /* no arguments */ case 0: { /* no arguments */
lua_pushnumber(L, r); /* Number between 0 and 1 */ lua_pushnumber(L, (lua_Number)r); /* Number between 0 and 1 */
break; return 1;
} }
case 1: { /* only upper limit */ case 1: { /* only upper limit */
lua_Number u = luaL_checknumber(L, 1); low = 1;
luaL_argcheck(L, (lua_Number)1.0 <= u, 1, "interval is empty"); up = luaL_checkinteger(L, 1);
lua_pushnumber(L, l_mathop(floor)(r*u) + (lua_Number)(1.0)); /* [1, u] */
break; break;
} }
case 2: { /* lower and upper limits */ case 2: { /* lower and upper limits */
lua_Number l = luaL_checknumber(L, 1); low = luaL_checkinteger(L, 1);
lua_Number u = luaL_checknumber(L, 2); up = luaL_checkinteger(L, 2);
luaL_argcheck(L, l <= u, 2, "interval is empty");
lua_pushnumber(L, l_mathop(floor)(r*(u-l+1)) + l); /* [l, u] */
break; break;
} }
default: return luaL_error(L, "wrong number of arguments"); default: return luaL_error(L, "wrong number of arguments");
} }
/* random integer in the interval [low, up] */
luaL_argcheck(L, low <= up, 1, "interval is empty");
luaL_argcheck(L, low >= 0 || up <= LUA_MAXINTEGER + low, 1,
"interval too large");
r *= (double)(up - low) + 1.0;
lua_pushinteger(L, (lua_Integer)r + low);
return 1; return 1;
} }
static int math_randomseed (lua_State *L) { static int math_randomseed (lua_State *L) {
srand(luaL_checkunsigned(L, 1)); l_srand((unsigned int)(lua_Integer)luaL_checknumber(L, 1));
(void)rand(); /* discard first value to avoid undesirable correlations */ (void)l_rand(); /* discard first value to avoid undesirable correlations */
return 0; return 0;
} }
static int math_type (lua_State *L) {
if (lua_type(L, 1) == LUA_TNUMBER) {
if (lua_isinteger(L, 1))
lua_pushliteral(L, "integer");
else
lua_pushliteral(L, "float");
}
else {
luaL_checkany(L, 1);
lua_pushnil(L);
}
return 1;
}
/*
** {==================================================================
** Deprecated functions (for compatibility only)
** ===================================================================
*/
#if defined(LUA_COMPAT_MATHLIB)
static int math_cosh (lua_State *L) {
lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_sinh (lua_State *L) {
lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_tanh (lua_State *L) {
lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_pow (lua_State *L) {
lua_Number x = luaL_checknumber(L, 1);
lua_Number y = luaL_checknumber(L, 2);
lua_pushnumber(L, l_mathop(pow)(x, y));
return 1;
}
static int math_frexp (lua_State *L) {
int e;
lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));
lua_pushinteger(L, e);
return 2;
}
static int math_ldexp (lua_State *L) {
lua_Number x = luaL_checknumber(L, 1);
int ep = (int)luaL_checkinteger(L, 2);
lua_pushnumber(L, l_mathop(ldexp)(x, ep));
return 1;
}
static int math_log10 (lua_State *L) {
lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
return 1;
}
#endif
/* }================================================================== */
static const luaL_Reg mathlib[] = { static const luaL_Reg mathlib[] = {
{"abs", math_abs}, {"abs", math_abs},
{"acos", math_acos}, {"acos", math_acos},
{"asin", math_asin}, {"asin", math_asin},
{"atan2", math_atan2},
{"atan", math_atan}, {"atan", math_atan},
{"ceil", math_ceil}, {"ceil", math_ceil},
{"cosh", math_cosh},
{"cos", math_cos}, {"cos", math_cos},
{"deg", math_deg}, {"deg", math_deg},
{"exp", math_exp}, {"exp", math_exp},
{"tointeger", math_toint},
{"floor", math_floor}, {"floor", math_floor},
{"fmod", math_fmod}, {"fmod", math_fmod},
{"frexp", math_frexp}, {"ult", math_ult},
{"ldexp", math_ldexp},
#if defined(LUA_COMPAT_LOG10)
{"log10", math_log10},
#endif
{"log", math_log}, {"log", math_log},
{"max", math_max}, {"max", math_max},
{"min", math_min}, {"min", math_min},
{"modf", math_modf}, {"modf", math_modf},
{"pow", math_pow},
{"rad", math_rad}, {"rad", math_rad},
{"random", math_random}, {"random", math_random},
{"randomseed", math_randomseed}, {"randomseed", math_randomseed},
{"sinh", math_sinh},
{"sin", math_sin}, {"sin", math_sin},
{"sqrt", math_sqrt}, {"sqrt", math_sqrt},
{"tanh", math_tanh},
{"tan", math_tan}, {"tan", math_tan},
{"type", math_type},
#if defined(LUA_COMPAT_MATHLIB)
{"atan2", math_atan},
{"cosh", math_cosh},
{"sinh", math_sinh},
{"tanh", math_tanh},
{"pow", math_pow},
{"frexp", math_frexp},
{"ldexp", math_ldexp},
{"log10", math_log10},
#endif
/* placeholders */
{"pi", NULL},
{"huge", NULL},
{"maxinteger", NULL},
{"mininteger", NULL},
{NULL, NULL} {NULL, NULL}
}; };
@ -272,8 +396,12 @@ LUAMOD_API int luaopen_math (lua_State *L) {
luaL_newlib(L, mathlib); luaL_newlib(L, mathlib);
lua_pushnumber(L, PI); lua_pushnumber(L, PI);
lua_setfield(L, -2, "pi"); lua_setfield(L, -2, "pi");
lua_pushnumber(L, HUGE_VAL); lua_pushnumber(L, (lua_Number)HUGE_VAL);
lua_setfield(L, -2, "huge"); lua_setfield(L, -2, "huge");
lua_pushinteger(L, LUA_MAXINTEGER);
lua_setfield(L, -2, "maxinteger");
lua_pushinteger(L, LUA_MININTEGER);
lua_setfield(L, -2, "mininteger");
return 1; return 1;
} }

@ -1,15 +1,17 @@
/* /*
** $Id: lmem.c,v 1.84.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lmem.c,v 1.91 2015/03/06 19:45:54 roberto Exp $
** Interface to Memory Manager ** Interface to Memory Manager
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <stddef.h>
#define lmem_c #define lmem_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include <stddef.h>
#include "lua.h" #include "lua.h"
#include "ldebug.h" #include "ldebug.h"
@ -24,15 +26,15 @@
/* /*
** About the realloc function: ** About the realloc function:
** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize); ** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
** (`osize' is the old size, `nsize' is the new size) ** ('osize' is the old size, 'nsize' is the new size)
** **
** * frealloc(ud, NULL, x, s) creates a new block of size `s' (no ** * frealloc(ud, NULL, x, s) creates a new block of size 's' (no
** matter 'x'). ** matter 'x').
** **
** * frealloc(ud, p, x, 0) frees the block `p' ** * frealloc(ud, p, x, 0) frees the block 'p'
** (in this specific case, frealloc must return NULL); ** (in this specific case, frealloc must return NULL);
** particularly, frealloc(ud, NULL, 0, 0) does nothing ** particularly, frealloc(ud, NULL, 0, 0) does nothing
** (which is equivalent to free(NULL) in ANSI C) ** (which is equivalent to free(NULL) in ISO C)
** **
** frealloc returns NULL if it cannot create or reallocate the area ** frealloc returns NULL if it cannot create or reallocate the area
** (any reallocation to an equal or smaller size cannot fail!) ** (any reallocation to an equal or smaller size cannot fail!)
@ -83,9 +85,8 @@ void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
#endif #endif
newblock = (*g->frealloc)(g->ud, block, osize, nsize); newblock = (*g->frealloc)(g->ud, block, osize, nsize);
if (newblock == NULL && nsize > 0) { if (newblock == NULL && nsize > 0) {
api_check(L, nsize > realosize, lua_assert(nsize > realosize); /* cannot fail when shrinking a block */
"realloc cannot fail when shrinking a block"); if (g->version) { /* is state fully built? */
if (g->gcrunning) {
luaC_fullgc(L, 1); /* try to free some memory... */ luaC_fullgc(L, 1); /* try to free some memory... */
newblock = (*g->frealloc)(g->ud, block, osize, nsize); /* try again */ newblock = (*g->frealloc)(g->ud, block, osize, nsize); /* try again */
} }

@ -1,5 +1,5 @@
/* /*
** $Id: loadlib.c,v 1.111.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: loadlib.c,v 1.127 2015/11/23 11:30:45 roberto Exp $
** Dynamic library loader for Lua ** Dynamic library loader for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
** **
@ -8,22 +8,16 @@
** systems. ** systems.
*/ */
#define loadlib_c
#define LUA_LIB
/* #include "lprefix.h"
** if needed, includes windows header before everything else
*/
#if defined(_WIN32)
#include <windows.h>
#endif
#include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define loadlib_c
#define LUA_LIB
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
@ -31,21 +25,21 @@
/* /*
** LUA_PATH and LUA_CPATH are the names of the environment ** LUA_PATH_VAR and LUA_CPATH_VAR are the names of the environment
** variables that Lua check to set its paths. ** variables that Lua check to set its paths.
*/ */
#if !defined(LUA_PATH) #if !defined(LUA_PATH_VAR)
#define LUA_PATH "LUA_PATH" #define LUA_PATH_VAR "LUA_PATH"
#endif #endif
#if !defined(LUA_CPATH) #if !defined(LUA_CPATH_VAR)
#define LUA_CPATH "LUA_CPATH" #define LUA_CPATH_VAR "LUA_CPATH"
#endif #endif
#define LUA_PATHSUFFIX "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR #define LUA_PATHSUFFIX "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
#define LUA_PATHVERSION LUA_PATH LUA_PATHSUFFIX #define LUA_PATHVARVERSION LUA_PATH_VAR LUA_PATHSUFFIX
#define LUA_CPATHVERSION LUA_CPATH LUA_PATHSUFFIX #define LUA_CPATHVARVERSION LUA_CPATH_VAR LUA_PATHSUFFIX
/* /*
** LUA_PATH_SEP is the character that separates templates in a path. ** LUA_PATH_SEP is the character that separates templates in a path.
@ -92,29 +86,45 @@
#define LUA_OFSEP "_" #define LUA_OFSEP "_"
/* table (in the registry) that keeps handles for all loaded C libraries */ /*
#define CLIBS "_CLIBS" ** unique key for table in the registry that keeps handles
** for all loaded C libraries
*/
static const int CLIBS = 0;
#define LIB_FAIL "open" #define LIB_FAIL "open"
/* error codes for ll_loadfunc */
#define ERRLIB 1
#define ERRFUNC 2
#define setprogdir(L) ((void)0) #define setprogdir(L) ((void)0)
/* /*
** system-dependent functions ** system-dependent functions
*/ */
static void ll_unloadlib (void *lib);
static void *ll_load (lua_State *L, const char *path, int seeglb);
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym);
/*
** unload library 'lib'
*/
static void lsys_unloadlib (void *lib);
/*
** load C library in file 'path'. If 'seeglb', load with all names in
** the library global.
** Returns the library; in case of error, returns NULL plus an
** error string in the stack.
*/
static void *lsys_load (lua_State *L, const char *path, int seeglb);
/*
** Try to find a function named 'sym' in library 'lib'.
** Returns the function; in case of error, returns NULL plus an
** error string in the stack.
*/
static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym);
#if defined(LUA_USE_DLOPEN)
#if defined(LUA_USE_DLOPEN) /* { */
/* /*
** {======================================================================== ** {========================================================================
** This is an implementation of loadlib based on the dlfcn interface. ** This is an implementation of loadlib based on the dlfcn interface.
@ -126,20 +136,32 @@ static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym);
#include <dlfcn.h> #include <dlfcn.h>
static void ll_unloadlib (void *lib) { /*
** Macro to convert pointer-to-void* to pointer-to-function. This cast
** is undefined according to ISO C, but POSIX assumes that it works.
** (The '__extension__' in gnu compilers is only to avoid warnings.)
*/
#if defined(__GNUC__)
#define cast_func(p) (__extension__ (lua_CFunction)(p))
#else
#define cast_func(p) ((lua_CFunction)(p))
#endif
static void lsys_unloadlib (void *lib) {
dlclose(lib); dlclose(lib);
} }
static void *ll_load (lua_State *L, const char *path, int seeglb) { static void *lsys_load (lua_State *L, const char *path, int seeglb) {
void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL)); void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL));
if (lib == NULL) lua_pushstring(L, dlerror()); if (lib == NULL) lua_pushstring(L, dlerror());
return lib; return lib;
} }
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) { static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
lua_CFunction f = (lua_CFunction)dlsym(lib, sym); lua_CFunction f = cast_func(dlsym(lib, sym));
if (f == NULL) lua_pushstring(L, dlerror()); if (f == NULL) lua_pushstring(L, dlerror());
return f; return f;
} }
@ -148,13 +170,15 @@ static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
#elif defined(LUA_DL_DLL) #elif defined(LUA_DL_DLL) /* }{ */
/* /*
** {====================================================================== ** {======================================================================
** This is an implementation of loadlib for Windows using native functions. ** This is an implementation of loadlib for Windows using native functions.
** ======================================================================= ** =======================================================================
*/ */
#include <windows.h>
#undef setprogdir #undef setprogdir
/* /*
@ -190,12 +214,12 @@ static void pusherror (lua_State *L) {
lua_pushfstring(L, "system error %d\n", error); lua_pushfstring(L, "system error %d\n", error);
} }
static void ll_unloadlib (void *lib) { static void lsys_unloadlib (void *lib) {
FreeLibrary((HMODULE)lib); FreeLibrary((HMODULE)lib);
} }
static void *ll_load (lua_State *L, const char *path, int seeglb) { static void *lsys_load (lua_State *L, const char *path, int seeglb) {
HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS); HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS);
(void)(seeglb); /* not used: symbols are 'global' by default */ (void)(seeglb); /* not used: symbols are 'global' by default */
if (lib == NULL) pusherror(L); if (lib == NULL) pusherror(L);
@ -203,7 +227,7 @@ static void *ll_load (lua_State *L, const char *path, int seeglb) {
} }
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) { static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym); lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym);
if (f == NULL) pusherror(L); if (f == NULL) pusherror(L);
return f; return f;
@ -212,7 +236,7 @@ static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
/* }====================================================== */ /* }====================================================== */
#else #else /* }{ */
/* /*
** {====================================================== ** {======================================================
** Fallback for other systems ** Fallback for other systems
@ -226,31 +250,34 @@ static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
#define DLMSG "dynamic libraries not enabled; check your Lua installation" #define DLMSG "dynamic libraries not enabled; check your Lua installation"
static void ll_unloadlib (void *lib) { static void lsys_unloadlib (void *lib) {
(void)(lib); /* not used */ (void)(lib); /* not used */
} }
static void *ll_load (lua_State *L, const char *path, int seeglb) { static void *lsys_load (lua_State *L, const char *path, int seeglb) {
(void)(path); (void)(seeglb); /* not used */ (void)(path); (void)(seeglb); /* not used */
lua_pushliteral(L, DLMSG); lua_pushliteral(L, DLMSG);
return NULL; return NULL;
} }
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) { static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
(void)(lib); (void)(sym); /* not used */ (void)(lib); (void)(sym); /* not used */
lua_pushliteral(L, DLMSG); lua_pushliteral(L, DLMSG);
return NULL; return NULL;
} }
/* }====================================================== */ /* }====================================================== */
#endif #endif /* } */
static void *ll_checkclib (lua_State *L, const char *path) { /*
** return registry.CLIBS[path]
*/
static void *checkclib (lua_State *L, const char *path) {
void *plib; void *plib;
lua_getfield(L, LUA_REGISTRYINDEX, CLIBS); lua_rawgetp(L, LUA_REGISTRYINDEX, &CLIBS);
lua_getfield(L, -1, path); lua_getfield(L, -1, path);
plib = lua_touserdata(L, -1); /* plib = CLIBS[path] */ plib = lua_touserdata(L, -1); /* plib = CLIBS[path] */
lua_pop(L, 2); /* pop CLIBS table and 'plib' */ lua_pop(L, 2); /* pop CLIBS table and 'plib' */
@ -258,8 +285,12 @@ static void *ll_checkclib (lua_State *L, const char *path) {
} }
static void ll_addtoclib (lua_State *L, const char *path, void *plib) { /*
lua_getfield(L, LUA_REGISTRYINDEX, CLIBS); ** registry.CLIBS[path] = plib -- for queries
** registry.CLIBS[#CLIBS + 1] = plib -- also keep a list of all libraries
*/
static void addtoclib (lua_State *L, const char *path, void *plib) {
lua_rawgetp(L, LUA_REGISTRYINDEX, &CLIBS);
lua_pushlightuserdata(L, plib); lua_pushlightuserdata(L, plib);
lua_pushvalue(L, -1); lua_pushvalue(L, -1);
lua_setfield(L, -3, path); /* CLIBS[path] = plib */ lua_setfield(L, -3, path); /* CLIBS[path] = plib */
@ -269,33 +300,49 @@ static void ll_addtoclib (lua_State *L, const char *path, void *plib) {
/* /*
** __gc tag method for CLIBS table: calls 'll_unloadlib' for all lib ** __gc tag method for CLIBS table: calls 'lsys_unloadlib' for all lib
** handles in list CLIBS ** handles in list CLIBS
*/ */
static int gctm (lua_State *L) { static int gctm (lua_State *L) {
int n = luaL_len(L, 1); lua_Integer n = luaL_len(L, 1);
for (; n >= 1; n--) { /* for each handle, in reverse order */ for (; n >= 1; n--) { /* for each handle, in reverse order */
lua_rawgeti(L, 1, n); /* get handle CLIBS[n] */ lua_rawgeti(L, 1, n); /* get handle CLIBS[n] */
ll_unloadlib(lua_touserdata(L, -1)); lsys_unloadlib(lua_touserdata(L, -1));
lua_pop(L, 1); /* pop handle */ lua_pop(L, 1); /* pop handle */
} }
return 0; return 0;
} }
static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
void *reg = ll_checkclib(L, path); /* check loaded C libraries */ /* error codes for 'lookforfunc' */
#define ERRLIB 1
#define ERRFUNC 2
/*
** Look for a C function named 'sym' in a dynamically loaded library
** 'path'.
** First, check whether the library is already loaded; if not, try
** to load it.
** Then, if 'sym' is '*', return true (as library has been loaded).
** Otherwise, look for symbol 'sym' in the library and push a
** C function with that symbol.
** Return 0 and 'true' or a function in the stack; in case of
** errors, return an error code and an error message in the stack.
*/
static int lookforfunc (lua_State *L, const char *path, const char *sym) {
void *reg = checkclib(L, path); /* check loaded C libraries */
if (reg == NULL) { /* must load library? */ if (reg == NULL) { /* must load library? */
reg = ll_load(L, path, *sym == '*'); reg = lsys_load(L, path, *sym == '*'); /* global symbols if 'sym'=='*' */
if (reg == NULL) return ERRLIB; /* unable to load library */ if (reg == NULL) return ERRLIB; /* unable to load library */
ll_addtoclib(L, path, reg); addtoclib(L, path, reg);
} }
if (*sym == '*') { /* loading only library (no function)? */ if (*sym == '*') { /* loading only library (no function)? */
lua_pushboolean(L, 1); /* return 'true' */ lua_pushboolean(L, 1); /* return 'true' */
return 0; /* no errors */ return 0; /* no errors */
} }
else { else {
lua_CFunction f = ll_sym(L, reg, sym); lua_CFunction f = lsys_sym(L, reg, sym);
if (f == NULL) if (f == NULL)
return ERRFUNC; /* unable to find function */ return ERRFUNC; /* unable to find function */
lua_pushcfunction(L, f); /* else create new function */ lua_pushcfunction(L, f); /* else create new function */
@ -307,7 +354,7 @@ static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
static int ll_loadlib (lua_State *L) { static int ll_loadlib (lua_State *L) {
const char *path = luaL_checkstring(L, 1); const char *path = luaL_checkstring(L, 1);
const char *init = luaL_checkstring(L, 2); const char *init = luaL_checkstring(L, 2);
int stat = ll_loadfunc(L, path, init); int stat = lookforfunc(L, path, init);
if (stat == 0) /* no errors? */ if (stat == 0) /* no errors? */
return 1; /* return the loaded function */ return 1; /* return the loaded function */
else { /* error; error message is on stack top */ else { /* error; error message is on stack top */
@ -360,7 +407,7 @@ static const char *searchpath (lua_State *L, const char *name,
lua_remove(L, -2); /* remove path template */ lua_remove(L, -2); /* remove path template */
if (readable(filename)) /* does file exist and is readable? */ if (readable(filename)) /* does file exist and is readable? */
return filename; /* return that file name */ return filename; /* return that file name */
lua_pushfstring(L, "\n\tno file " LUA_QS, filename); lua_pushfstring(L, "\n\tno file '%s'", filename);
lua_remove(L, -2); /* remove file name */ lua_remove(L, -2); /* remove file name */
luaL_addvalue(&msg); /* concatenate error msg. entry */ luaL_addvalue(&msg); /* concatenate error msg. entry */
} }
@ -390,7 +437,7 @@ static const char *findfile (lua_State *L, const char *name,
lua_getfield(L, lua_upvalueindex(1), pname); lua_getfield(L, lua_upvalueindex(1), pname);
path = lua_tostring(L, -1); path = lua_tostring(L, -1);
if (path == NULL) if (path == NULL)
luaL_error(L, LUA_QL("package.%s") " must be a string", pname); luaL_error(L, "'package.%s' must be a string", pname);
return searchpath(L, name, path, ".", dirsep); return searchpath(L, name, path, ".", dirsep);
} }
@ -401,8 +448,7 @@ static int checkload (lua_State *L, int stat, const char *filename) {
return 2; /* return open function and file name */ return 2; /* return open function and file name */
} }
else else
return luaL_error(L, "error loading module " LUA_QS return luaL_error(L, "error loading module '%s' from file '%s':\n\t%s",
" from file " LUA_QS ":\n\t%s",
lua_tostring(L, 1), filename, lua_tostring(L, -1)); lua_tostring(L, 1), filename, lua_tostring(L, -1));
} }
@ -416,21 +462,29 @@ static int searcher_Lua (lua_State *L) {
} }
/*
** Try to find a load function for module 'modname' at file 'filename'.
** First, change '.' to '_' in 'modname'; then, if 'modname' has
** the form X-Y (that is, it has an "ignore mark"), build a function
** name "luaopen_X" and look for it. (For compatibility, if that
** fails, it also tries "luaopen_Y".) If there is no ignore mark,
** look for a function named "luaopen_modname".
*/
static int loadfunc (lua_State *L, const char *filename, const char *modname) { static int loadfunc (lua_State *L, const char *filename, const char *modname) {
const char *funcname; const char *openfunc;
const char *mark; const char *mark;
modname = luaL_gsub(L, modname, ".", LUA_OFSEP); modname = luaL_gsub(L, modname, ".", LUA_OFSEP);
mark = strchr(modname, *LUA_IGMARK); mark = strchr(modname, *LUA_IGMARK);
if (mark) { if (mark) {
int stat; int stat;
funcname = lua_pushlstring(L, modname, mark - modname); openfunc = lua_pushlstring(L, modname, mark - modname);
funcname = lua_pushfstring(L, LUA_POF"%s", funcname); openfunc = lua_pushfstring(L, LUA_POF"%s", openfunc);
stat = ll_loadfunc(L, filename, funcname); stat = lookforfunc(L, filename, openfunc);
if (stat != ERRFUNC) return stat; if (stat != ERRFUNC) return stat;
modname = mark + 1; /* else go ahead and try old-style name */ modname = mark + 1; /* else go ahead and try old-style name */
} }
funcname = lua_pushfstring(L, LUA_POF"%s", modname); openfunc = lua_pushfstring(L, LUA_POF"%s", modname);
return ll_loadfunc(L, filename, funcname); return lookforfunc(L, filename, openfunc);
} }
@ -455,8 +509,7 @@ static int searcher_Croot (lua_State *L) {
if (stat != ERRFUNC) if (stat != ERRFUNC)
return checkload(L, 0, filename); /* real error */ return checkload(L, 0, filename); /* real error */
else { /* open function not found */ else { /* open function not found */
lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS, lua_pushfstring(L, "\n\tno module '%s' in file '%s'", name, filename);
name, filename);
return 1; return 1;
} }
} }
@ -468,8 +521,7 @@ static int searcher_Croot (lua_State *L) {
static int searcher_preload (lua_State *L) { static int searcher_preload (lua_State *L) {
const char *name = luaL_checkstring(L, 1); const char *name = luaL_checkstring(L, 1);
lua_getfield(L, LUA_REGISTRYINDEX, "_PRELOAD"); lua_getfield(L, LUA_REGISTRYINDEX, "_PRELOAD");
lua_getfield(L, -1, name); if (lua_getfield(L, -1, name) == LUA_TNIL) /* not found? */
if (lua_isnil(L, -1)) /* not found? */
lua_pushfstring(L, "\n\tno field package.preload['%s']", name); lua_pushfstring(L, "\n\tno field package.preload['%s']", name);
return 1; return 1;
} }
@ -479,17 +531,15 @@ static void findloader (lua_State *L, const char *name) {
int i; int i;
luaL_Buffer msg; /* to build error message */ luaL_Buffer msg; /* to build error message */
luaL_buffinit(L, &msg); luaL_buffinit(L, &msg);
lua_getfield(L, lua_upvalueindex(1), "searchers"); /* will be at index 3 */ /* push 'package.searchers' to index 3 in the stack */
if (!lua_istable(L, 3)) if (lua_getfield(L, lua_upvalueindex(1), "searchers") != LUA_TTABLE)
luaL_error(L, LUA_QL("package.searchers") " must be a table"); luaL_error(L, "'package.searchers' must be a table");
/* iterate over available searchers to find a loader */ /* iterate over available searchers to find a loader */
for (i = 1; ; i++) { for (i = 1; ; i++) {
lua_rawgeti(L, 3, i); /* get a searcher */ if (lua_rawgeti(L, 3, i) == LUA_TNIL) { /* no more searchers? */
if (lua_isnil(L, -1)) { /* no more searchers? */
lua_pop(L, 1); /* remove nil */ lua_pop(L, 1); /* remove nil */
luaL_pushresult(&msg); /* create error message */ luaL_pushresult(&msg); /* create error message */
luaL_error(L, "module " LUA_QS " not found:%s", luaL_error(L, "module '%s' not found:%s", name, lua_tostring(L, -1));
name, lua_tostring(L, -1));
} }
lua_pushstring(L, name); lua_pushstring(L, name);
lua_call(L, 1, 2); /* call it */ lua_call(L, 1, 2); /* call it */
@ -520,8 +570,7 @@ static int ll_require (lua_State *L) {
lua_call(L, 2, 1); /* run loader to load module */ lua_call(L, 2, 1); /* run loader to load module */
if (!lua_isnil(L, -1)) /* non-nil return? */ if (!lua_isnil(L, -1)) /* non-nil return? */
lua_setfield(L, 2, name); /* _LOADED[name] = returned value */ lua_setfield(L, 2, name); /* _LOADED[name] = returned value */
lua_getfield(L, 2, name); if (lua_getfield(L, 2, name) == LUA_TNIL) { /* module set no value? */
if (lua_isnil(L, -1)) { /* module did not set a value? */
lua_pushboolean(L, 1); /* use true as result */ lua_pushboolean(L, 1); /* use true as result */
lua_pushvalue(L, -1); /* extra copy to be returned */ lua_pushvalue(L, -1); /* extra copy to be returned */
lua_setfield(L, 2, name); /* _LOADED[name] = true */ lua_setfield(L, 2, name); /* _LOADED[name] = true */
@ -548,7 +597,7 @@ static void set_env (lua_State *L) {
if (lua_getstack(L, 1, &ar) == 0 || if (lua_getstack(L, 1, &ar) == 0 ||
lua_getinfo(L, "f", &ar) == 0 || /* get calling function */ lua_getinfo(L, "f", &ar) == 0 || /* get calling function */
lua_iscfunction(L, -1)) lua_iscfunction(L, -1))
luaL_error(L, LUA_QL("module") " not called from a Lua function"); luaL_error(L, "'module' not called from a Lua function");
lua_pushvalue(L, -2); /* copy new environment table to top */ lua_pushvalue(L, -2); /* copy new environment table to top */
lua_setupvalue(L, -2, 1); lua_setupvalue(L, -2, 1);
lua_pop(L, 1); /* remove function */ lua_pop(L, 1); /* remove function */
@ -587,9 +636,8 @@ static int ll_module (lua_State *L) {
int lastarg = lua_gettop(L); /* last parameter */ int lastarg = lua_gettop(L); /* last parameter */
luaL_pushmodule(L, modname, 1); /* get/create module table */ luaL_pushmodule(L, modname, 1); /* get/create module table */
/* check whether table already has a _NAME field */ /* check whether table already has a _NAME field */
lua_getfield(L, -1, "_NAME"); if (lua_getfield(L, -1, "_NAME") != LUA_TNIL)
if (!lua_isnil(L, -1)) /* is table an initialized module? */ lua_pop(L, 1); /* table is an initialized module */
lua_pop(L, 1);
else { /* no; initialize it */ else { /* no; initialize it */
lua_pop(L, 1); lua_pop(L, 1);
modinit(L, modname); modinit(L, modname);
@ -659,6 +707,12 @@ static const luaL_Reg pk_funcs[] = {
#if defined(LUA_COMPAT_MODULE) #if defined(LUA_COMPAT_MODULE)
{"seeall", ll_seeall}, {"seeall", ll_seeall},
#endif #endif
/* placeholders */
{"preload", NULL},
{"cpath", NULL},
{"path", NULL},
{"searchers", NULL},
{"loaded", NULL},
{NULL, NULL} {NULL, NULL}
}; };
@ -678,42 +732,50 @@ static void createsearcherstable (lua_State *L) {
int i; int i;
/* create 'searchers' table */ /* create 'searchers' table */
lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0); lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0);
/* fill it with pre-defined searchers */ /* fill it with predefined searchers */
for (i=0; searchers[i] != NULL; i++) { for (i=0; searchers[i] != NULL; i++) {
lua_pushvalue(L, -2); /* set 'package' as upvalue for all searchers */ lua_pushvalue(L, -2); /* set 'package' as upvalue for all searchers */
lua_pushcclosure(L, searchers[i], 1); lua_pushcclosure(L, searchers[i], 1);
lua_rawseti(L, -2, i+1); lua_rawseti(L, -2, i+1);
} }
#if defined(LUA_COMPAT_LOADERS)
lua_pushvalue(L, -1); /* make a copy of 'searchers' table */
lua_setfield(L, -3, "loaders"); /* put it in field 'loaders' */
#endif
lua_setfield(L, -2, "searchers"); /* put it in field 'searchers' */
} }
LUAMOD_API int luaopen_package (lua_State *L) { /*
/* create table CLIBS to keep track of loaded C libraries */ ** create table CLIBS to keep track of loaded C libraries,
luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS); ** setting a finalizer to close all libraries when closing state.
lua_createtable(L, 0, 1); /* metatable for CLIBS */ */
static void createclibstable (lua_State *L) {
lua_newtable(L); /* create CLIBS table */
lua_createtable(L, 0, 1); /* create metatable for CLIBS */
lua_pushcfunction(L, gctm); lua_pushcfunction(L, gctm);
lua_setfield(L, -2, "__gc"); /* set finalizer for CLIBS table */ lua_setfield(L, -2, "__gc"); /* set finalizer for CLIBS table */
lua_setmetatable(L, -2); lua_setmetatable(L, -2);
/* create `package' table */ lua_rawsetp(L, LUA_REGISTRYINDEX, &CLIBS); /* set CLIBS table in registry */
luaL_newlib(L, pk_funcs); }
LUAMOD_API int luaopen_package (lua_State *L) {
createclibstable(L);
luaL_newlib(L, pk_funcs); /* create 'package' table */
createsearcherstable(L); createsearcherstable(L);
#if defined(LUA_COMPAT_LOADERS)
lua_pushvalue(L, -1); /* make a copy of 'searchers' table */
lua_setfield(L, -3, "loaders"); /* put it in field `loaders' */
#endif
lua_setfield(L, -2, "searchers"); /* put it in field 'searchers' */
/* set field 'path' */ /* set field 'path' */
setpath(L, "path", LUA_PATHVERSION, LUA_PATH, LUA_PATH_DEFAULT); setpath(L, "path", LUA_PATHVARVERSION, LUA_PATH_VAR, LUA_PATH_DEFAULT);
/* set field 'cpath' */ /* set field 'cpath' */
setpath(L, "cpath", LUA_CPATHVERSION, LUA_CPATH, LUA_CPATH_DEFAULT); setpath(L, "cpath", LUA_CPATHVARVERSION, LUA_CPATH_VAR, LUA_CPATH_DEFAULT);
/* store config information */ /* store config information */
lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n" lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n"
LUA_EXEC_DIR "\n" LUA_IGMARK "\n"); LUA_EXEC_DIR "\n" LUA_IGMARK "\n");
lua_setfield(L, -2, "config"); lua_setfield(L, -2, "config");
/* set field `loaded' */ /* set field 'loaded' */
luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED"); luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
lua_setfield(L, -2, "loaded"); lua_setfield(L, -2, "loaded");
/* set field `preload' */ /* set field 'preload' */
luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD"); luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
lua_setfield(L, -2, "preload"); lua_setfield(L, -2, "preload");
lua_pushglobaltable(L); lua_pushglobaltable(L);

@ -1,17 +1,22 @@
/* /*
** $Id: lobject.c,v 2.58.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lobject.c,v 2.111 2016/05/20 14:07:48 roberto Exp $
** Some generic functions over Lua objects ** Some generic functions over Lua objects
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define lobject_c
#define LUA_CORE
#include "lprefix.h"
#include <locale.h>
#include <math.h>
#include <stdarg.h> #include <stdarg.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define lobject_c
#define LUA_CORE
#include "lua.h" #include "lua.h"
#include "lctype.h" #include "lctype.h"
@ -36,8 +41,12 @@ LUAI_DDEF const TValue luaO_nilobject_ = {NILCONSTANT};
int luaO_int2fb (unsigned int x) { int luaO_int2fb (unsigned int x) {
int e = 0; /* exponent */ int e = 0; /* exponent */
if (x < 8) return x; if (x < 8) return x;
while (x >= 0x10) { while (x >= (8 << 4)) { /* coarse steps */
x = (x+1) >> 1; x = (x + 0xf) >> 4; /* x = ceil(x / 16) */
e += 4;
}
while (x >= (8 << 1)) { /* fine steps */
x = (x + 1) >> 1; /* x = ceil(x / 2) */
e++; e++;
} }
return ((e+1) << 3) | (cast_int(x) - 8); return ((e+1) << 3) | (cast_int(x) - 8);
@ -46,14 +55,15 @@ int luaO_int2fb (unsigned int x) {
/* converts back */ /* converts back */
int luaO_fb2int (int x) { int luaO_fb2int (int x) {
int e = (x >> 3) & 0x1f; return (x < 8) ? x : ((x & 7) + 8) << ((x >> 3) - 1);
if (e == 0) return x;
else return ((x & 7) + 8) << (e - 1);
} }
/*
** Computes ceil(log2(x))
*/
int luaO_ceillog2 (unsigned int x) { int luaO_ceillog2 (unsigned int x) {
static const lu_byte log_2[256] = { static const lu_byte log_2[256] = { /* log_2[i] = ceil(log2(i - 1)) */
0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
@ -70,29 +80,90 @@ int luaO_ceillog2 (unsigned int x) {
} }
lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2) { static lua_Integer intarith (lua_State *L, int op, lua_Integer v1,
lua_Integer v2) {
switch (op) { switch (op) {
case LUA_OPADD: return luai_numadd(NULL, v1, v2); case LUA_OPADD: return intop(+, v1, v2);
case LUA_OPSUB: return luai_numsub(NULL, v1, v2); case LUA_OPSUB:return intop(-, v1, v2);
case LUA_OPMUL: return luai_nummul(NULL, v1, v2); case LUA_OPMUL:return intop(*, v1, v2);
case LUA_OPDIV: return luai_numdiv(NULL, v1, v2); case LUA_OPMOD: return luaV_mod(L, v1, v2);
case LUA_OPMOD: return luai_nummod(NULL, v1, v2); case LUA_OPIDIV: return luaV_div(L, v1, v2);
case LUA_OPPOW: return luai_numpow(NULL, v1, v2); case LUA_OPBAND: return intop(&, v1, v2);
case LUA_OPUNM: return luai_numunm(NULL, v1); case LUA_OPBOR: return intop(|, v1, v2);
case LUA_OPBXOR: return intop(^, v1, v2);
case LUA_OPSHL: return luaV_shiftl(v1, v2);
case LUA_OPSHR: return luaV_shiftl(v1, -v2);
case LUA_OPUNM: return intop(-, 0, v1);
case LUA_OPBNOT: return intop(^, ~l_castS2U(0), v1);
default: lua_assert(0); return 0; default: lua_assert(0); return 0;
} }
} }
int luaO_hexavalue (int c) { static lua_Number numarith (lua_State *L, int op, lua_Number v1,
if (lisdigit(c)) return c - '0'; lua_Number v2) {
else return ltolower(c) - 'a' + 10; switch (op) {
case LUA_OPADD: return luai_numadd(L, v1, v2);
case LUA_OPSUB: return luai_numsub(L, v1, v2);
case LUA_OPMUL: return luai_nummul(L, v1, v2);
case LUA_OPDIV: return luai_numdiv(L, v1, v2);
case LUA_OPPOW: return luai_numpow(L, v1, v2);
case LUA_OPIDIV: return luai_numidiv(L, v1, v2);
case LUA_OPUNM: return luai_numunm(L, v1);
case LUA_OPMOD: {
lua_Number m;
luai_nummod(L, v1, v2, m);
return m;
}
default: lua_assert(0); return 0;
}
} }
#if !defined(lua_strx2number) void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2,
TValue *res) {
switch (op) {
case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR:
case LUA_OPSHL: case LUA_OPSHR:
case LUA_OPBNOT: { /* operate only on integers */
lua_Integer i1; lua_Integer i2;
if (tointeger(p1, &i1) && tointeger(p2, &i2)) {
setivalue(res, intarith(L, op, i1, i2));
return;
}
else break; /* go to the end */
}
case LUA_OPDIV: case LUA_OPPOW: { /* operate only on floats */
lua_Number n1; lua_Number n2;
if (tonumber(p1, &n1) && tonumber(p2, &n2)) {
setfltvalue(res, numarith(L, op, n1, n2));
return;
}
else break; /* go to the end */
}
default: { /* other operations */
lua_Number n1; lua_Number n2;
if (ttisinteger(p1) && ttisinteger(p2)) {
setivalue(res, intarith(L, op, ivalue(p1), ivalue(p2)));
return;
}
else if (tonumber(p1, &n1) && tonumber(p2, &n2)) {
setfltvalue(res, numarith(L, op, n1, n2));
return;
}
else break; /* go to the end */
}
}
/* could not perform raw operation; try metamethod */
lua_assert(L != NULL); /* should not fail when folding (compile time) */
luaT_trybinTM(L, p1, p2, res, cast(TMS, (op - LUA_OPADD) + TM_ADD));
}
#include <math.h>
int luaO_hexavalue (int c) {
if (lisdigit(c)) return c - '0';
else return (ltolower(c) - 'a') + 10;
}
static int isneg (const char **s) { static int isneg (const char **s) {
@ -102,122 +173,285 @@ static int isneg (const char **s) {
} }
static lua_Number readhexa (const char **s, lua_Number r, int *count) {
for (; lisxdigit(cast_uchar(**s)); (*s)++) { /* read integer part */
r = (r * cast_num(16.0)) + cast_num(luaO_hexavalue(cast_uchar(**s)));
(*count)++;
}
return r;
}
/*
** {==================================================================
** Lua's implementation for 'lua_strx2number'
** ===================================================================
*/
#if !defined(lua_strx2number)
/* maximum number of significant digits to read (to avoid overflows
even with single floats) */
#define MAXSIGDIG 30
/* /*
** convert an hexadecimal numeric string to a number, following ** convert an hexadecimal numeric string to a number, following
** C99 specification for 'strtod' ** C99 specification for 'strtod'
*/ */
static lua_Number lua_strx2number (const char *s, char **endptr) { static lua_Number lua_strx2number (const char *s, char **endptr) {
lua_Number r = 0.0; int dot = lua_getlocaledecpoint();
int e = 0, i = 0; lua_Number r = 0.0; /* result (accumulator) */
int neg = 0; /* 1 if number is negative */ int sigdig = 0; /* number of significant digits */
int nosigdig = 0; /* number of non-significant digits */
int e = 0; /* exponent correction */
int neg; /* 1 if number is negative */
int hasdot = 0; /* true after seen a dot */
*endptr = cast(char *, s); /* nothing is valid yet */ *endptr = cast(char *, s); /* nothing is valid yet */
while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */ while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */
neg = isneg(&s); /* check signal */ neg = isneg(&s); /* check signal */
if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X'))) /* check '0x' */ if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X'))) /* check '0x' */
return 0.0; /* invalid format (no '0x') */ return 0.0; /* invalid format (no '0x') */
s += 2; /* skip '0x' */ for (s += 2; ; s++) { /* skip '0x' and read numeral */
r = readhexa(&s, r, &i); /* read integer part */ if (*s == dot) {
if (*s == '.') { if (hasdot) break; /* second dot? stop loop */
s++; /* skip dot */ else hasdot = 1;
r = readhexa(&s, r, &e); /* read fractional part */ }
else if (lisxdigit(cast_uchar(*s))) {
if (sigdig == 0 && *s == '0') /* non-significant digit (zero)? */
nosigdig++;
else if (++sigdig <= MAXSIGDIG) /* can read it without overflow? */
r = (r * cast_num(16.0)) + luaO_hexavalue(*s);
else e++; /* too many digits; ignore, but still count for exponent */
if (hasdot) e--; /* decimal digit? correct exponent */
}
else break; /* neither a dot nor a digit */
} }
if (i == 0 && e == 0) if (nosigdig + sigdig == 0) /* no digits? */
return 0.0; /* invalid format (no digit) */ return 0.0; /* invalid format */
e *= -4; /* each fractional digit divides value by 2^-4 */
*endptr = cast(char *, s); /* valid up to here */ *endptr = cast(char *, s); /* valid up to here */
e *= 4; /* each digit multiplies/divides value by 2^4 */
if (*s == 'p' || *s == 'P') { /* exponent part? */ if (*s == 'p' || *s == 'P') { /* exponent part? */
int exp1 = 0; int exp1 = 0; /* exponent value */
int neg1; int neg1; /* exponent signal */
s++; /* skip 'p' */ s++; /* skip 'p' */
neg1 = isneg(&s); /* signal */ neg1 = isneg(&s); /* signal */
if (!lisdigit(cast_uchar(*s))) if (!lisdigit(cast_uchar(*s)))
goto ret; /* must have at least one digit */ return 0.0; /* invalid; must have at least one digit */
while (lisdigit(cast_uchar(*s))) /* read exponent */ while (lisdigit(cast_uchar(*s))) /* read exponent */
exp1 = exp1 * 10 + *(s++) - '0'; exp1 = exp1 * 10 + *(s++) - '0';
if (neg1) exp1 = -exp1; if (neg1) exp1 = -exp1;
e += exp1; e += exp1;
*endptr = cast(char *, s); /* valid up to here */
} }
*endptr = cast(char *, s); /* valid up to here */
ret:
if (neg) r = -r; if (neg) r = -r;
return l_mathop(ldexp)(r, e); return l_mathop(ldexp)(r, e);
} }
#endif #endif
/* }====================================================== */
/* maximum length of a numeral */
#if !defined (L_MAXLENNUM)
#define L_MAXLENNUM 200
#endif
int luaO_str2d (const char *s, size_t len, lua_Number *result) { static const char *l_str2dloc (const char *s, lua_Number *result, int mode) {
char *endptr; char *endptr;
if (strpbrk(s, "nN")) /* reject 'inf' and 'nan' */ *result = (mode == 'x') ? lua_strx2number(s, &endptr) /* try to convert */
return 0; : lua_str2number(s, &endptr);
else if (strpbrk(s, "xX")) /* hexa? */ if (endptr == s) return NULL; /* nothing recognized? */
*result = lua_strx2number(s, &endptr); while (lisspace(cast_uchar(*endptr))) endptr++; /* skip trailing spaces */
return (*endptr == '\0') ? endptr : NULL; /* OK if no trailing characters */
}
/*
** Convert string 's' to a Lua number (put in 'result'). Return NULL
** on fail or the address of the ending '\0' on success.
** 'pmode' points to (and 'mode' contains) special things in the string:
** - 'x'/'X' means an hexadecimal numeral
** - 'n'/'N' means 'inf' or 'nan' (which should be rejected)
** - '.' just optimizes the search for the common case (nothing special)
** This function accepts both the current locale or a dot as the radix
** mark. If the convertion fails, it may mean number has a dot but
** locale accepts something else. In that case, the code copies 's'
** to a buffer (because 's' is read-only), changes the dot to the
** current locale radix mark, and tries to convert again.
*/
static const char *l_str2d (const char *s, lua_Number *result) {
const char *endptr;
const char *pmode = strpbrk(s, ".xXnN");
int mode = pmode ? ltolower(cast_uchar(*pmode)) : 0;
if (mode == 'n') /* reject 'inf' and 'nan' */
return NULL;
endptr = l_str2dloc(s, result, mode); /* try to convert */
if (endptr == NULL) { /* failed? may be a different locale */
char buff[L_MAXLENNUM + 1];
char *pdot = strchr(s, '.');
if (strlen(s) > L_MAXLENNUM || pdot == NULL)
return NULL; /* string too long or no dot; fail */
strcpy(buff, s); /* copy string to buffer */
buff[pdot - s] = lua_getlocaledecpoint(); /* correct decimal point */
endptr = l_str2dloc(buff, result, mode); /* try again */
if (endptr != NULL)
endptr = s + (endptr - buff); /* make relative to 's' */
}
return endptr;
}
#define MAXBY10 cast(lua_Unsigned, LUA_MAXINTEGER / 10)
#define MAXLASTD cast_int(LUA_MAXINTEGER % 10)
static const char *l_str2int (const char *s, lua_Integer *result) {
lua_Unsigned a = 0;
int empty = 1;
int neg;
while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */
neg = isneg(&s);
if (s[0] == '0' &&
(s[1] == 'x' || s[1] == 'X')) { /* hex? */
s += 2; /* skip '0x' */
for (; lisxdigit(cast_uchar(*s)); s++) {
a = a * 16 + luaO_hexavalue(*s);
empty = 0;
}
}
else { /* decimal */
for (; lisdigit(cast_uchar(*s)); s++) {
int d = *s - '0';
if (a >= MAXBY10 && (a > MAXBY10 || d > MAXLASTD + neg)) /* overflow? */
return NULL; /* do not accept it (as integer) */
a = a * 10 + d;
empty = 0;
}
}
while (lisspace(cast_uchar(*s))) s++; /* skip trailing spaces */
if (empty || *s != '\0') return NULL; /* something wrong in the numeral */
else {
*result = l_castU2S((neg) ? 0u - a : a);
return s;
}
}
size_t luaO_str2num (const char *s, TValue *o) {
lua_Integer i; lua_Number n;
const char *e;
if ((e = l_str2int(s, &i)) != NULL) { /* try as an integer */
setivalue(o, i);
}
else if ((e = l_str2d(s, &n)) != NULL) { /* else try as a float */
setfltvalue(o, n);
}
else else
*result = lua_str2number(s, &endptr); return 0; /* conversion failed */
if (endptr == s) return 0; /* nothing recognized */ return (e - s) + 1; /* success; return string size */
while (lisspace(cast_uchar(*endptr))) endptr++; }
return (endptr == s + len); /* OK if no trailing characters */
int luaO_utf8esc (char *buff, unsigned long x) {
int n = 1; /* number of bytes put in buffer (backwards) */
lua_assert(x <= 0x10FFFF);
if (x < 0x80) /* ascii? */
buff[UTF8BUFFSZ - 1] = cast(char, x);
else { /* need continuation bytes */
unsigned int mfb = 0x3f; /* maximum that fits in first byte */
do { /* add continuation bytes */
buff[UTF8BUFFSZ - (n++)] = cast(char, 0x80 | (x & 0x3f));
x >>= 6; /* remove added bits */
mfb >>= 1; /* now there is one less bit available in first byte */
} while (x > mfb); /* still needs continuation byte? */
buff[UTF8BUFFSZ - n] = cast(char, (~mfb << 1) | x); /* add first byte */
}
return n;
} }
/* maximum length of the conversion of a number to a string */
#define MAXNUMBER2STR 50
/*
** Convert a number object to a string
*/
void luaO_tostring (lua_State *L, StkId obj) {
char buff[MAXNUMBER2STR];
size_t len;
lua_assert(ttisnumber(obj));
if (ttisinteger(obj))
len = lua_integer2str(buff, sizeof(buff), ivalue(obj));
else {
len = lua_number2str(buff, sizeof(buff), fltvalue(obj));
#if !defined(LUA_COMPAT_FLOATSTRING)
if (buff[strspn(buff, "-0123456789")] == '\0') { /* looks like an int? */
buff[len++] = lua_getlocaledecpoint();
buff[len++] = '0'; /* adds '.0' to result */
}
#endif
}
setsvalue2s(L, obj, luaS_newlstr(L, buff, len));
}
static void pushstr (lua_State *L, const char *str, size_t l) { static void pushstr (lua_State *L, const char *str, size_t l) {
setsvalue2s(L, L->top++, luaS_newlstr(L, str, l)); setsvalue2s(L, L->top, luaS_newlstr(L, str, l));
luaD_inctop(L);
} }
/* this function handles only `%d', `%c', %f, %p, and `%s' formats */ /*
** this function handles only '%d', '%c', '%f', '%p', and '%s'
conventional formats, plus Lua-specific '%I' and '%U'
*/
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
int n = 0; int n = 0;
for (;;) { for (;;) {
const char *e = strchr(fmt, '%'); const char *e = strchr(fmt, '%');
if (e == NULL) break; if (e == NULL) break;
luaD_checkstack(L, 2); /* fmt + item */
pushstr(L, fmt, e - fmt); pushstr(L, fmt, e - fmt);
switch (*(e+1)) { switch (*(e+1)) {
case 's': { case 's': { /* zero-terminated string */
const char *s = va_arg(argp, char *); const char *s = va_arg(argp, char *);
if (s == NULL) s = "(null)"; if (s == NULL) s = "(null)";
pushstr(L, s, strlen(s)); pushstr(L, s, strlen(s));
break; break;
} }
case 'c': { case 'c': { /* an 'int' as a character */
char buff; char buff = cast(char, va_arg(argp, int));
buff = cast(char, va_arg(argp, int)); if (lisprint(cast_uchar(buff)))
pushstr(L, &buff, 1); pushstr(L, &buff, 1);
else /* non-printable character; print its code */
luaO_pushfstring(L, "<\\%d>", cast_uchar(buff));
break; break;
} }
case 'd': { case 'd': { /* an 'int' */
setnvalue(L->top++, cast_num(va_arg(argp, int))); setivalue(L->top, va_arg(argp, int));
break; goto top2str;
}
case 'I': { /* a 'lua_Integer' */
setivalue(L->top, cast(lua_Integer, va_arg(argp, l_uacInt)));
goto top2str;
} }
case 'f': { case 'f': { /* a 'lua_Number' */
setnvalue(L->top++, cast_num(va_arg(argp, l_uacNumber))); setfltvalue(L->top, cast_num(va_arg(argp, l_uacNumber)));
top2str: /* convert the top element to a string */
luaD_inctop(L);
luaO_tostring(L, L->top - 1);
break; break;
} }
case 'p': { case 'p': { /* a pointer */
char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */ char buff[4*sizeof(void *) + 8]; /* should be enough space for a '%p' */
int l = sprintf(buff, "%p", va_arg(argp, void *)); int l = l_sprintf(buff, sizeof(buff), "%p", va_arg(argp, void *));
pushstr(L, buff, l); pushstr(L, buff, l);
break; break;
} }
case 'U': { /* an 'int' as a UTF-8 sequence */
char buff[UTF8BUFFSZ];
int l = luaO_utf8esc(buff, cast(long, va_arg(argp, long)));
pushstr(L, buff + UTF8BUFFSZ - l, l);
break;
}
case '%': { case '%': {
pushstr(L, "%", 1); pushstr(L, "%", 1);
break; break;
} }
default: { default: {
luaG_runerror(L, luaG_runerror(L, "invalid option '%%%c' to 'lua_pushfstring'",
"invalid option " LUA_QL("%%%c") " to " LUA_QL("lua_pushfstring"), *(e + 1));
*(e + 1));
} }
} }
n += 2; n += 2;

@ -1,13 +1,16 @@
/* /*
** $Id: lopcodes.c,v 1.49.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lopcodes.c,v 1.55 2015/01/05 13:48:33 roberto Exp $
** Opcodes for Lua virtual machine ** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define lopcodes_c #define lopcodes_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include <stddef.h>
#include "lopcodes.h" #include "lopcodes.h"
@ -31,10 +34,17 @@ LUAI_DDEF const char *const luaP_opnames[NUM_OPCODES+1] = {
"ADD", "ADD",
"SUB", "SUB",
"MUL", "MUL",
"DIV",
"MOD", "MOD",
"POW", "POW",
"DIV",
"IDIV",
"BAND",
"BOR",
"BXOR",
"SHL",
"SHR",
"UNM", "UNM",
"BNOT",
"NOT", "NOT",
"LEN", "LEN",
"CONCAT", "CONCAT",
@ -79,10 +89,17 @@ LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_ADD */ ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_ADD */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_SUB */ ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_SUB */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_MUL */ ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_MUL */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_DIV */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_MOD */ ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_MOD */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_POW */ ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_POW */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_DIV */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_IDIV */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_BAND */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_BOR */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_BXOR */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_SHL */
,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_SHR */
,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_UNM */ ,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_UNM */
,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_BNOT */
,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_NOT */ ,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_NOT */
,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_LEN */ ,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_LEN */
,opmode(0, 1, OpArgR, OpArgR, iABC) /* OP_CONCAT */ ,opmode(0, 1, OpArgR, OpArgR, iABC) /* OP_CONCAT */

@ -1,9 +1,14 @@
/* /*
** $Id: loslib.c,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: loslib.c,v 1.64 2016/04/18 13:06:55 roberto Exp $
** Standard Operating System library ** Standard Operating System library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define loslib_c
#define LUA_LIB
#include "lprefix.h"
#include <errno.h> #include <errno.h>
#include <locale.h> #include <locale.h>
@ -11,9 +16,6 @@
#include <string.h> #include <string.h>
#include <time.h> #include <time.h>
#define loslib_c
#define LUA_LIB
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
@ -21,60 +23,119 @@
/* /*
** list of valid conversion specifiers for the 'strftime' function ** {==================================================================
** List of valid conversion specifiers for the 'strftime' function;
** options are grouped by length; group of length 2 start with '||'.
** ===================================================================
*/ */
#if !defined(LUA_STRFTIMEOPTIONS) #if !defined(LUA_STRFTIMEOPTIONS) /* { */
#if !defined(LUA_USE_POSIX)
#define LUA_STRFTIMEOPTIONS { "aAbBcdHIjmMpSUwWxXyYz%", "" }
#else
#define LUA_STRFTIMEOPTIONS \
{ "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "" \
"", "E", "cCxXyY", \
"O", "deHImMSuUVwWy" }
#endif
/* options for ANSI C 89 */
#define L_STRFTIMEC89 "aAbBcdHIjmMpSUwWxXyYZ%"
/* options for ISO C 99 and POSIX */
#define L_STRFTIMEC99 "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%" \
"||" "EcECExEXEyEY" "OdOeOHOIOmOMOSOuOUOVOwOWOy"
/* options for Windows */
#define L_STRFTIMEWIN "aAbBcdHIjmMpSUwWxXyYzZ%" \
"||" "#c#x#d#H#I#j#m#M#S#U#w#W#y#Y"
#if defined(LUA_USE_WINDOWS)
#define LUA_STRFTIMEOPTIONS L_STRFTIMEWIN
#elif defined(LUA_USE_C89)
#define LUA_STRFTIMEOPTIONS L_STRFTIMEC89
#else /* C99 specification */
#define LUA_STRFTIMEOPTIONS L_STRFTIMEC99
#endif #endif
#endif /* } */
/* }================================================================== */
/* /*
** By default, Lua uses tmpnam except when POSIX is available, where it ** {==================================================================
** uses mkstemp. ** Configuration for time-related stuff
** ===================================================================
*/ */
#if defined(LUA_USE_MKSTEMP)
#include <unistd.h>
#define LUA_TMPNAMBUFSIZE 32
#define lua_tmpnam(b,e) { \
strcpy(b, "/tmp/lua_XXXXXX"); \
e = mkstemp(b); \
if (e != -1) close(e); \
e = (e == -1); }
#elif !defined(lua_tmpnam) #if !defined(l_time_t) /* { */
/*
** type to represent time_t in Lua
*/
#define l_timet lua_Integer
#define l_pushtime(L,t) lua_pushinteger(L,(lua_Integer)(t))
#define LUA_TMPNAMBUFSIZE L_tmpnam static time_t l_checktime (lua_State *L, int arg) {
#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); } lua_Integer t = luaL_checkinteger(L, arg);
luaL_argcheck(L, (time_t)t == t, arg, "time out-of-bounds");
return (time_t)t;
}
#endif #endif /* } */
#if !defined(l_gmtime) /* { */
/* /*
** By default, Lua uses gmtime/localtime, except when POSIX is available, ** By default, Lua uses gmtime/localtime, except when POSIX is available,
** where it uses gmtime_r/localtime_r ** where it uses gmtime_r/localtime_r
*/ */
#if defined(LUA_USE_GMTIME_R)
#if defined(LUA_USE_POSIX) /* { */
#define l_gmtime(t,r) gmtime_r(t,r) #define l_gmtime(t,r) gmtime_r(t,r)
#define l_localtime(t,r) localtime_r(t,r) #define l_localtime(t,r) localtime_r(t,r)
#elif !defined(l_gmtime) #else /* }{ */
/* ISO C definitions */
#define l_gmtime(t,r) ((void)(r)->tm_sec, gmtime(t))
#define l_localtime(t,r) ((void)(r)->tm_sec, localtime(t))
#endif /* } */
#endif /* } */
/* }================================================================== */
/*
** {==================================================================
** Configuration for 'tmpnam':
** By default, Lua uses tmpnam except when POSIX is available, where
** it uses mkstemp.
** ===================================================================
*/
#if !defined(lua_tmpnam) /* { */
#if defined(LUA_USE_POSIX) /* { */
#include <unistd.h>
#define l_gmtime(t,r) ((void)r, gmtime(t)) #define LUA_TMPNAMBUFSIZE 32
#define l_localtime(t,r) ((void)r, localtime(t))
#if !defined(LUA_TMPNAMTEMPLATE)
#define LUA_TMPNAMTEMPLATE "/tmp/lua_XXXXXX"
#endif #endif
#define lua_tmpnam(b,e) { \
strcpy(b, LUA_TMPNAMTEMPLATE); \
e = mkstemp(b); \
if (e != -1) close(e); \
e = (e == -1); }
#else /* }{ */
/* ISO C definitions */
#define LUA_TMPNAMBUFSIZE L_tmpnam
#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); }
#endif /* } */
#endif /* } */
/* }================================================================== */
static int os_execute (lua_State *L) { static int os_execute (lua_State *L) {
@ -145,45 +206,67 @@ static void setboolfield (lua_State *L, const char *key, int value) {
lua_setfield(L, -2, key); lua_setfield(L, -2, key);
} }
/*
** Set all fields from structure 'tm' in the table on top of the stack
*/
static void setallfields (lua_State *L, struct tm *stm) {
setfield(L, "sec", stm->tm_sec);
setfield(L, "min", stm->tm_min);
setfield(L, "hour", stm->tm_hour);
setfield(L, "day", stm->tm_mday);
setfield(L, "month", stm->tm_mon + 1);
setfield(L, "year", stm->tm_year + 1900);
setfield(L, "wday", stm->tm_wday + 1);
setfield(L, "yday", stm->tm_yday + 1);
setboolfield(L, "isdst", stm->tm_isdst);
}
static int getboolfield (lua_State *L, const char *key) { static int getboolfield (lua_State *L, const char *key) {
int res; int res;
lua_getfield(L, -1, key); res = (lua_getfield(L, -1, key) == LUA_TNIL) ? -1 : lua_toboolean(L, -1);
res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
lua_pop(L, 1); lua_pop(L, 1);
return res; return res;
} }
static int getfield (lua_State *L, const char *key, int d) { /* maximum value for date fields (to avoid arithmetic overflows with 'int') */
int res, isnum; #if !defined(L_MAXDATEFIELD)
lua_getfield(L, -1, key); #define L_MAXDATEFIELD (INT_MAX / 2)
res = (int)lua_tointegerx(L, -1, &isnum); #endif
if (!isnum) {
if (d < 0) static int getfield (lua_State *L, const char *key, int d, int delta) {
return luaL_error(L, "field " LUA_QS " missing in date table", key); int isnum;
int t = lua_getfield(L, -1, key); /* get field and its type */
lua_Integer res = lua_tointegerx(L, -1, &isnum);
if (!isnum) { /* field is not an integer? */
if (t != LUA_TNIL) /* some other value? */
return luaL_error(L, "field '%s' is not an integer", key);
else if (d < 0) /* absent field; no default? */
return luaL_error(L, "field '%s' missing in date table", key);
res = d; res = d;
} }
else {
if (!(-L_MAXDATEFIELD <= res && res <= L_MAXDATEFIELD))
return luaL_error(L, "field '%s' is out-of-bound", key);
res -= delta;
}
lua_pop(L, 1); lua_pop(L, 1);
return res; return (int)res;
} }
static const char *checkoption (lua_State *L, const char *conv, char *buff) { static const char *checkoption (lua_State *L, const char *conv, char *buff) {
static const char *const options[] = LUA_STRFTIMEOPTIONS; const char *option;
unsigned int i; int oplen = 1;
for (i = 0; i < sizeof(options)/sizeof(options[0]); i += 2) { for (option = LUA_STRFTIMEOPTIONS; *option != '\0'; option += oplen) {
if (*conv != '\0' && strchr(options[i], *conv) != NULL) { if (*option == '|') /* next block? */
buff[1] = *conv; oplen++; /* next length */
if (*options[i + 1] == '\0') { /* one-char conversion specifier? */ else if (memcmp(conv, option, oplen) == 0) { /* match? */
buff[2] = '\0'; /* end buffer */ memcpy(buff, conv, oplen); /* copy valid option to buffer */
return conv + 1; buff[oplen] = '\0';
} return conv + oplen; /* return next item */
else if (*(conv + 1) != '\0' &&
strchr(options[i + 1], *(conv + 1)) != NULL) {
buff[2] = *(conv + 1); /* valid two-char conversion specifier */
buff[3] = '\0'; /* end buffer */
return conv + 2;
}
} }
} }
luaL_argerror(L, 1, luaL_argerror(L, 1,
@ -192,44 +275,40 @@ static const char *checkoption (lua_State *L, const char *conv, char *buff) {
} }
/* maximum size for an individual 'strftime' item */
#define SIZETIMEFMT 250
static int os_date (lua_State *L) { static int os_date (lua_State *L) {
const char *s = luaL_optstring(L, 1, "%c"); const char *s = luaL_optstring(L, 1, "%c");
time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL)); time_t t = luaL_opt(L, l_checktime, 2, time(NULL));
struct tm tmr, *stm; struct tm tmr, *stm;
if (*s == '!') { /* UTC? */ if (*s == '!') { /* UTC? */
stm = l_gmtime(&t, &tmr); stm = l_gmtime(&t, &tmr);
s++; /* skip `!' */ s++; /* skip '!' */
} }
else else
stm = l_localtime(&t, &tmr); stm = l_localtime(&t, &tmr);
if (stm == NULL) /* invalid date? */ if (stm == NULL) /* invalid date? */
lua_pushnil(L); luaL_error(L, "time result cannot be represented in this installation");
else if (strcmp(s, "*t") == 0) { if (strcmp(s, "*t") == 0) {
lua_createtable(L, 0, 9); /* 9 = number of fields */ lua_createtable(L, 0, 9); /* 9 = number of fields */
setfield(L, "sec", stm->tm_sec); setallfields(L, stm);
setfield(L, "min", stm->tm_min);
setfield(L, "hour", stm->tm_hour);
setfield(L, "day", stm->tm_mday);
setfield(L, "month", stm->tm_mon+1);
setfield(L, "year", stm->tm_year+1900);
setfield(L, "wday", stm->tm_wday+1);
setfield(L, "yday", stm->tm_yday+1);
setboolfield(L, "isdst", stm->tm_isdst);
} }
else { else {
char cc[4]; char cc[4]; /* buffer for individual conversion specifiers */
luaL_Buffer b; luaL_Buffer b;
cc[0] = '%'; cc[0] = '%';
luaL_buffinit(L, &b); luaL_buffinit(L, &b);
while (*s) { while (*s) {
if (*s != '%') /* no conversion specifier? */ if (*s != '%') /* not a conversion specifier? */
luaL_addchar(&b, *s++); luaL_addchar(&b, *s++);
else { else {
size_t reslen; size_t reslen;
char buff[200]; /* should be big enough for any conversion result */ char *buff = luaL_prepbuffsize(&b, SIZETIMEFMT);
s = checkoption(L, s + 1, cc); s = checkoption(L, s + 1, cc + 1); /* copy specifier to 'cc' */
reslen = strftime(buff, sizeof(buff), cc, stm); reslen = strftime(buff, SIZETIMEFMT, cc, stm);
luaL_addlstring(&b, buff, reslen); luaL_addsize(&b, reslen);
} }
} }
luaL_pushresult(&b); luaL_pushresult(&b);
@ -246,26 +325,27 @@ static int os_time (lua_State *L) {
struct tm ts; struct tm ts;
luaL_checktype(L, 1, LUA_TTABLE); luaL_checktype(L, 1, LUA_TTABLE);
lua_settop(L, 1); /* make sure table is at the top */ lua_settop(L, 1); /* make sure table is at the top */
ts.tm_sec = getfield(L, "sec", 0); ts.tm_sec = getfield(L, "sec", 0, 0);
ts.tm_min = getfield(L, "min", 0); ts.tm_min = getfield(L, "min", 0, 0);
ts.tm_hour = getfield(L, "hour", 12); ts.tm_hour = getfield(L, "hour", 12, 0);
ts.tm_mday = getfield(L, "day", -1); ts.tm_mday = getfield(L, "day", -1, 0);
ts.tm_mon = getfield(L, "month", -1) - 1; ts.tm_mon = getfield(L, "month", -1, 1);
ts.tm_year = getfield(L, "year", -1) - 1900; ts.tm_year = getfield(L, "year", -1, 1900);
ts.tm_isdst = getboolfield(L, "isdst"); ts.tm_isdst = getboolfield(L, "isdst");
t = mktime(&ts); t = mktime(&ts);
setallfields(L, &ts); /* update fields with normalized values */
} }
if (t == (time_t)(-1)) if (t != (time_t)(l_timet)t || t == (time_t)(-1))
lua_pushnil(L); luaL_error(L, "time result cannot be represented in this installation");
else l_pushtime(L, t);
lua_pushnumber(L, (lua_Number)t);
return 1; return 1;
} }
static int os_difftime (lua_State *L) { static int os_difftime (lua_State *L) {
lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)), time_t t1 = l_checktime(L, 1);
(time_t)(luaL_optnumber(L, 2, 0)))); time_t t2 = l_checktime(L, 2);
lua_pushnumber(L, (lua_Number)difftime(t1, t2));
return 1; return 1;
} }
@ -289,7 +369,7 @@ static int os_exit (lua_State *L) {
if (lua_isboolean(L, 1)) if (lua_isboolean(L, 1))
status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE); status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
else else
status = luaL_optint(L, 1, EXIT_SUCCESS); status = (int)luaL_optinteger(L, 1, EXIT_SUCCESS);
if (lua_toboolean(L, 2)) if (lua_toboolean(L, 2))
lua_close(L); lua_close(L);
if (L) exit(status); /* 'if' to avoid warnings for unreachable 'return' */ if (L) exit(status); /* 'if' to avoid warnings for unreachable 'return' */

@ -1,15 +1,17 @@
/* /*
** $Id: lparser.c,v 2.130.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lparser.c,v 2.153 2016/05/13 19:10:16 roberto Exp $
** Lua Parser ** Lua Parser
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <string.h>
#define lparser_c #define lparser_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include <string.h>
#include "lua.h" #include "lua.h"
#include "lcode.h" #include "lcode.h"
@ -35,17 +37,21 @@
#define hasmultret(k) ((k) == VCALL || (k) == VVARARG) #define hasmultret(k) ((k) == VCALL || (k) == VVARARG)
/* because all strings are unified by the scanner, the parser
can use pointer equality for string equality */
#define eqstr(a,b) ((a) == (b))
/* /*
** nodes for block list (list of active blocks) ** nodes for block list (list of active blocks)
*/ */
typedef struct BlockCnt { typedef struct BlockCnt {
struct BlockCnt *previous; /* chain */ struct BlockCnt *previous; /* chain */
short firstlabel; /* index of first label in this block */ int firstlabel; /* index of first label in this block */
short firstgoto; /* index of first pending goto in this block */ int firstgoto; /* index of first pending goto in this block */
lu_byte nactvar; /* # active locals outside the block */ lu_byte nactvar; /* # active locals outside the block */
lu_byte upval; /* true if some variable in the block is an upvalue */ lu_byte upval; /* true if some variable in the block is an upvalue */
lu_byte isloop; /* true if `block' is a loop */ lu_byte isloop; /* true if 'block' is a loop */
} BlockCnt; } BlockCnt;
@ -57,19 +63,9 @@ static void statement (LexState *ls);
static void expr (LexState *ls, expdesc *v); static void expr (LexState *ls, expdesc *v);
static void anchor_token (LexState *ls) {
/* last token from outer function must be EOS */
lua_assert(ls->fs != NULL || ls->t.token == TK_EOS);
if (ls->t.token == TK_NAME || ls->t.token == TK_STRING) {
TString *ts = ls->t.seminfo.ts;
luaX_newstring(ls, getstr(ts), ts->tsv.len);
}
}
/* semantic error */ /* semantic error */
static l_noret semerror (LexState *ls, const char *msg) { static l_noret semerror (LexState *ls, const char *msg) {
ls->t.token = 0; /* remove 'near to' from final message */ ls->t.token = 0; /* remove "near <token>" from final message */
luaX_syntaxerror(ls, msg); luaX_syntaxerror(ls, msg);
} }
@ -168,7 +164,8 @@ static int registerlocalvar (LexState *ls, TString *varname) {
int oldsize = f->sizelocvars; int oldsize = f->sizelocvars;
luaM_growvector(ls->L, f->locvars, fs->nlocvars, f->sizelocvars, luaM_growvector(ls->L, f->locvars, fs->nlocvars, f->sizelocvars,
LocVar, SHRT_MAX, "local variables"); LocVar, SHRT_MAX, "local variables");
while (oldsize < f->sizelocvars) f->locvars[oldsize++].varname = NULL; while (oldsize < f->sizelocvars)
f->locvars[oldsize++].varname = NULL;
f->locvars[fs->nlocvars].varname = varname; f->locvars[fs->nlocvars].varname = varname;
luaC_objbarrier(ls->L, f, varname); luaC_objbarrier(ls->L, f, varname);
return fs->nlocvars++; return fs->nlocvars++;
@ -222,7 +219,7 @@ static int searchupvalue (FuncState *fs, TString *name) {
int i; int i;
Upvaldesc *up = fs->f->upvalues; Upvaldesc *up = fs->f->upvalues;
for (i = 0; i < fs->nups; i++) { for (i = 0; i < fs->nups; i++) {
if (luaS_eqstr(up[i].name, name)) return i; if (eqstr(up[i].name, name)) return i;
} }
return -1; /* not found */ return -1; /* not found */
} }
@ -234,7 +231,8 @@ static int newupvalue (FuncState *fs, TString *name, expdesc *v) {
checklimit(fs, fs->nups + 1, MAXUPVAL, "upvalues"); checklimit(fs, fs->nups + 1, MAXUPVAL, "upvalues");
luaM_growvector(fs->ls->L, f->upvalues, fs->nups, f->sizeupvalues, luaM_growvector(fs->ls->L, f->upvalues, fs->nups, f->sizeupvalues,
Upvaldesc, MAXUPVAL, "upvalues"); Upvaldesc, MAXUPVAL, "upvalues");
while (oldsize < f->sizeupvalues) f->upvalues[oldsize++].name = NULL; while (oldsize < f->sizeupvalues)
f->upvalues[oldsize++].name = NULL;
f->upvalues[fs->nups].instack = (v->k == VLOCAL); f->upvalues[fs->nups].instack = (v->k == VLOCAL);
f->upvalues[fs->nups].idx = cast_byte(v->u.info); f->upvalues[fs->nups].idx = cast_byte(v->u.info);
f->upvalues[fs->nups].name = name; f->upvalues[fs->nups].name = name;
@ -246,7 +244,7 @@ static int newupvalue (FuncState *fs, TString *name, expdesc *v) {
static int searchvar (FuncState *fs, TString *n) { static int searchvar (FuncState *fs, TString *n) {
int i; int i;
for (i = cast_int(fs->nactvar) - 1; i >= 0; i--) { for (i = cast_int(fs->nactvar) - 1; i >= 0; i--) {
if (luaS_eqstr(n, getlocvar(fs, i)->varname)) if (eqstr(n, getlocvar(fs, i)->varname))
return i; return i;
} }
return -1; /* not found */ return -1; /* not found */
@ -259,7 +257,8 @@ static int searchvar (FuncState *fs, TString *n) {
*/ */
static void markupval (FuncState *fs, int level) { static void markupval (FuncState *fs, int level) {
BlockCnt *bl = fs->bl; BlockCnt *bl = fs->bl;
while (bl->nactvar > level) bl = bl->previous; while (bl->nactvar > level)
bl = bl->previous;
bl->upval = 1; bl->upval = 1;
} }
@ -268,27 +267,26 @@ static void markupval (FuncState *fs, int level) {
Find variable with given name 'n'. If it is an upvalue, add this Find variable with given name 'n'. If it is an upvalue, add this
upvalue into all intermediate functions. upvalue into all intermediate functions.
*/ */
static int singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) { static void singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) {
if (fs == NULL) /* no more levels? */ if (fs == NULL) /* no more levels? */
return VVOID; /* default is global */ init_exp(var, VVOID, 0); /* default is global */
else { else {
int v = searchvar(fs, n); /* look up locals at current level */ int v = searchvar(fs, n); /* look up locals at current level */
if (v >= 0) { /* found? */ if (v >= 0) { /* found? */
init_exp(var, VLOCAL, v); /* variable is local */ init_exp(var, VLOCAL, v); /* variable is local */
if (!base) if (!base)
markupval(fs, v); /* local will be used as an upval */ markupval(fs, v); /* local will be used as an upval */
return VLOCAL;
} }
else { /* not found as local at current level; try upvalues */ else { /* not found as local at current level; try upvalues */
int idx = searchupvalue(fs, n); /* try existing upvalues */ int idx = searchupvalue(fs, n); /* try existing upvalues */
if (idx < 0) { /* not found? */ if (idx < 0) { /* not found? */
if (singlevaraux(fs->prev, n, var, 0) == VVOID) /* try upper levels */ singlevaraux(fs->prev, n, var, 0); /* try upper levels */
return VVOID; /* not found; is a global */ if (var->k == VVOID) /* not found? */
return; /* it is a global */
/* else was LOCAL or UPVAL */ /* else was LOCAL or UPVAL */
idx = newupvalue(fs, n, var); /* will be a new upvalue */ idx = newupvalue(fs, n, var); /* will be a new upvalue */
} }
init_exp(var, VUPVAL, idx); init_exp(var, VUPVAL, idx); /* new or old upvalue */
return VUPVAL;
} }
} }
} }
@ -297,10 +295,11 @@ static int singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) {
static void singlevar (LexState *ls, expdesc *var) { static void singlevar (LexState *ls, expdesc *var) {
TString *varname = str_checkname(ls); TString *varname = str_checkname(ls);
FuncState *fs = ls->fs; FuncState *fs = ls->fs;
if (singlevaraux(fs, varname, var, 1) == VVOID) { /* global name? */ singlevaraux(fs, varname, var, 1);
if (var->k == VVOID) { /* global name? */
expdesc key; expdesc key;
singlevaraux(fs, ls->envn, var, 1); /* get environment variable */ singlevaraux(fs, ls->envn, var, 1); /* get environment variable */
lua_assert(var->k == VLOCAL || var->k == VUPVAL); lua_assert(var->k != VVOID); /* this one must exist */
codestring(ls, &key, varname); /* key is variable name */ codestring(ls, &key, varname); /* key is variable name */
luaK_indexed(fs, var, &key); /* env[varname] */ luaK_indexed(fs, var, &key); /* env[varname] */
} }
@ -342,11 +341,11 @@ static void closegoto (LexState *ls, int g, Labeldesc *label) {
FuncState *fs = ls->fs; FuncState *fs = ls->fs;
Labellist *gl = &ls->dyd->gt; Labellist *gl = &ls->dyd->gt;
Labeldesc *gt = &gl->arr[g]; Labeldesc *gt = &gl->arr[g];
lua_assert(luaS_eqstr(gt->name, label->name)); lua_assert(eqstr(gt->name, label->name));
if (gt->nactvar < label->nactvar) { if (gt->nactvar < label->nactvar) {
TString *vname = getlocvar(fs, gt->nactvar)->varname; TString *vname = getlocvar(fs, gt->nactvar)->varname;
const char *msg = luaO_pushfstring(ls->L, const char *msg = luaO_pushfstring(ls->L,
"<goto %s> at line %d jumps into the scope of local " LUA_QS, "<goto %s> at line %d jumps into the scope of local '%s'",
getstr(gt->name), gt->line, getstr(vname)); getstr(gt->name), gt->line, getstr(vname));
semerror(ls, msg); semerror(ls, msg);
} }
@ -369,7 +368,7 @@ static int findlabel (LexState *ls, int g) {
/* check labels in current block for a match */ /* check labels in current block for a match */
for (i = bl->firstlabel; i < dyd->label.n; i++) { for (i = bl->firstlabel; i < dyd->label.n; i++) {
Labeldesc *lb = &dyd->label.arr[i]; Labeldesc *lb = &dyd->label.arr[i];
if (luaS_eqstr(lb->name, gt->name)) { /* correct label? */ if (eqstr(lb->name, gt->name)) { /* correct label? */
if (gt->nactvar > lb->nactvar && if (gt->nactvar > lb->nactvar &&
(bl->upval || dyd->label.n > bl->firstlabel)) (bl->upval || dyd->label.n > bl->firstlabel))
luaK_patchclose(ls->fs, gt->pc, lb->nactvar); luaK_patchclose(ls->fs, gt->pc, lb->nactvar);
@ -390,7 +389,7 @@ static int newlabelentry (LexState *ls, Labellist *l, TString *name,
l->arr[n].line = line; l->arr[n].line = line;
l->arr[n].nactvar = ls->fs->nactvar; l->arr[n].nactvar = ls->fs->nactvar;
l->arr[n].pc = pc; l->arr[n].pc = pc;
l->n++; l->n = n + 1;
return n; return n;
} }
@ -403,7 +402,7 @@ static void findgotos (LexState *ls, Labeldesc *lb) {
Labellist *gl = &ls->dyd->gt; Labellist *gl = &ls->dyd->gt;
int i = ls->fs->bl->firstgoto; int i = ls->fs->bl->firstgoto;
while (i < gl->n) { while (i < gl->n) {
if (luaS_eqstr(gl->arr[i].name, lb->name)) if (eqstr(gl->arr[i].name, lb->name))
closegoto(ls, i, lb); closegoto(ls, i, lb);
else else
i++; i++;
@ -412,7 +411,7 @@ static void findgotos (LexState *ls, Labeldesc *lb) {
/* /*
** "export" pending gotos to outer level, to check them against ** export pending gotos to outer level, to check them against
** outer labels; if the block being exited has upvalues, and ** outer labels; if the block being exited has upvalues, and
** the goto exits the scope of any variable (which can be the ** the goto exits the scope of any variable (which can be the
** upvalue), close those variables being exited. ** upvalue), close those variables being exited.
@ -448,7 +447,7 @@ static void enterblock (FuncState *fs, BlockCnt *bl, lu_byte isloop) {
/* /*
** create a label named "break" to resolve break statements ** create a label named 'break' to resolve break statements
*/ */
static void breaklabel (LexState *ls) { static void breaklabel (LexState *ls) {
TString *n = luaS_new(ls->L, "break"); TString *n = luaS_new(ls->L, "break");
@ -463,7 +462,7 @@ static void breaklabel (LexState *ls) {
static l_noret undefgoto (LexState *ls, Labeldesc *gt) { static l_noret undefgoto (LexState *ls, Labeldesc *gt) {
const char *msg = isreserved(gt->name) const char *msg = isreserved(gt->name)
? "<%s> at line %d not inside a loop" ? "<%s> at line %d not inside a loop"
: "no visible label " LUA_QS " for <goto> at line %d"; : "no visible label '%s' for <goto> at line %d";
msg = luaO_pushfstring(ls->L, msg, getstr(gt->name), gt->line); msg = luaO_pushfstring(ls->L, msg, getstr(gt->name), gt->line);
semerror(ls, msg); semerror(ls, msg);
} }
@ -503,7 +502,8 @@ static Proto *addprototype (LexState *ls) {
if (fs->np >= f->sizep) { if (fs->np >= f->sizep) {
int oldsize = f->sizep; int oldsize = f->sizep;
luaM_growvector(L, f->p, fs->np, f->sizep, Proto *, MAXARG_Bx, "functions"); luaM_growvector(L, f->p, fs->np, f->sizep, Proto *, MAXARG_Bx, "functions");
while (oldsize < f->sizep) f->p[oldsize++] = NULL; while (oldsize < f->sizep)
f->p[oldsize++] = NULL;
} }
f->p[fs->np++] = clp = luaF_newproto(L); f->p[fs->np++] = clp = luaF_newproto(L);
luaC_objbarrier(L, f, clp); luaC_objbarrier(L, f, clp);
@ -525,7 +525,6 @@ static void codeclosure (LexState *ls, expdesc *v) {
static void open_func (LexState *ls, FuncState *fs, BlockCnt *bl) { static void open_func (LexState *ls, FuncState *fs, BlockCnt *bl) {
lua_State *L = ls->L;
Proto *f; Proto *f;
fs->prev = ls->fs; /* linked list of funcstates */ fs->prev = ls->fs; /* linked list of funcstates */
fs->ls = ls; fs->ls = ls;
@ -544,10 +543,6 @@ static void open_func (LexState *ls, FuncState *fs, BlockCnt *bl) {
f = fs->f; f = fs->f;
f->source = ls->source; f->source = ls->source;
f->maxstacksize = 2; /* registers 0/1 are always valid */ f->maxstacksize = 2; /* registers 0/1 are always valid */
fs->h = luaH_new(L);
/* anchor table of constants (to avoid being collected) */
sethvalue2s(L, L->top, fs->h);
incr_top(L);
enterblock(fs, bl, 0); enterblock(fs, bl, 0);
} }
@ -572,9 +567,6 @@ static void close_func (LexState *ls) {
f->sizeupvalues = fs->nups; f->sizeupvalues = fs->nups;
lua_assert(fs->bl == NULL); lua_assert(fs->bl == NULL);
ls->fs = fs->prev; ls->fs = fs->prev;
/* last token read was anchored in defunct function; must re-anchor it */
anchor_token(ls);
L->top--; /* pop table of constants */
luaC_checkGC(L); luaC_checkGC(L);
} }
@ -588,7 +580,7 @@ static void close_func (LexState *ls) {
/* /*
** check whether current token is in the follow set of a block. ** check whether current token is in the follow set of a block.
** 'until' closes syntactical blocks, but do not close scope, ** 'until' closes syntactical blocks, but do not close scope,
** so it handled in separate. ** so it is handled in separate.
*/ */
static int block_follow (LexState *ls, int withuntil) { static int block_follow (LexState *ls, int withuntil) {
switch (ls->t.token) { switch (ls->t.token) {
@ -602,7 +594,7 @@ static int block_follow (LexState *ls, int withuntil) {
static void statlist (LexState *ls) { static void statlist (LexState *ls) {
/* statlist -> { stat [`;'] } */ /* statlist -> { stat [';'] } */
while (!block_follow(ls, 1)) { while (!block_follow(ls, 1)) {
if (ls->t.token == TK_RETURN) { if (ls->t.token == TK_RETURN) {
statement(ls); statement(ls);
@ -643,14 +635,14 @@ static void yindex (LexState *ls, expdesc *v) {
struct ConsControl { struct ConsControl {
expdesc v; /* last list item read */ expdesc v; /* last list item read */
expdesc *t; /* table descriptor */ expdesc *t; /* table descriptor */
int nh; /* total number of `record' elements */ int nh; /* total number of 'record' elements */
int na; /* total number of array elements */ int na; /* total number of array elements */
int tostore; /* number of array elements pending to be stored */ int tostore; /* number of array elements pending to be stored */
}; };
static void recfield (LexState *ls, struct ConsControl *cc) { static void recfield (LexState *ls, struct ConsControl *cc) {
/* recfield -> (NAME | `['exp1`]') = exp1 */ /* recfield -> (NAME | '['exp1']') = exp1 */
FuncState *fs = ls->fs; FuncState *fs = ls->fs;
int reg = ls->fs->freereg; int reg = ls->fs->freereg;
expdesc key, val; expdesc key, val;
@ -757,12 +749,12 @@ static void constructor (LexState *ls, expdesc *t) {
static void parlist (LexState *ls) { static void parlist (LexState *ls) {
/* parlist -> [ param { `,' param } ] */ /* parlist -> [ param { ',' param } ] */
FuncState *fs = ls->fs; FuncState *fs = ls->fs;
Proto *f = fs->f; Proto *f = fs->f;
int nparams = 0; int nparams = 0;
f->is_vararg = 0; f->is_vararg = 0;
if (ls->t.token != ')') { /* is `parlist' not empty? */ if (ls->t.token != ')') { /* is 'parlist' not empty? */
do { do {
switch (ls->t.token) { switch (ls->t.token) {
case TK_NAME: { /* param -> NAME */ case TK_NAME: { /* param -> NAME */
@ -770,12 +762,12 @@ static void parlist (LexState *ls) {
nparams++; nparams++;
break; break;
} }
case TK_DOTS: { /* param -> `...' */ case TK_DOTS: { /* param -> '...' */
luaX_next(ls); luaX_next(ls);
f->is_vararg = 1; f->is_vararg = 2; /* declared vararg */
break; break;
} }
default: luaX_syntaxerror(ls, "<name> or " LUA_QL("...") " expected"); default: luaX_syntaxerror(ls, "<name> or '...' expected");
} }
} while (!f->is_vararg && testnext(ls, ',')); } while (!f->is_vararg && testnext(ls, ','));
} }
@ -786,7 +778,7 @@ static void parlist (LexState *ls) {
static void body (LexState *ls, expdesc *e, int ismethod, int line) { static void body (LexState *ls, expdesc *e, int ismethod, int line) {
/* body -> `(' parlist `)' block END */ /* body -> '(' parlist ')' block END */
FuncState new_fs; FuncState new_fs;
BlockCnt bl; BlockCnt bl;
new_fs.f = addprototype(ls); new_fs.f = addprototype(ls);
@ -808,7 +800,7 @@ static void body (LexState *ls, expdesc *e, int ismethod, int line) {
static int explist (LexState *ls, expdesc *v) { static int explist (LexState *ls, expdesc *v) {
/* explist -> expr { `,' expr } */ /* explist -> expr { ',' expr } */
int n = 1; /* at least one expression */ int n = 1; /* at least one expression */
expr(ls, v); expr(ls, v);
while (testnext(ls, ',')) { while (testnext(ls, ',')) {
@ -825,7 +817,7 @@ static void funcargs (LexState *ls, expdesc *f, int line) {
expdesc args; expdesc args;
int base, nparams; int base, nparams;
switch (ls->t.token) { switch (ls->t.token) {
case '(': { /* funcargs -> `(' [ explist ] `)' */ case '(': { /* funcargs -> '(' [ explist ] ')' */
luaX_next(ls); luaX_next(ls);
if (ls->t.token == ')') /* arg list is empty? */ if (ls->t.token == ')') /* arg list is empty? */
args.k = VVOID; args.k = VVOID;
@ -842,7 +834,7 @@ static void funcargs (LexState *ls, expdesc *f, int line) {
} }
case TK_STRING: { /* funcargs -> STRING */ case TK_STRING: { /* funcargs -> STRING */
codestring(ls, &args, ls->t.seminfo.ts); codestring(ls, &args, ls->t.seminfo.ts);
luaX_next(ls); /* must use `seminfo' before `next' */ luaX_next(ls); /* must use 'seminfo' before 'next' */
break; break;
} }
default: { default: {
@ -908,14 +900,14 @@ static void suffixedexp (LexState *ls, expdesc *v) {
fieldsel(ls, v); fieldsel(ls, v);
break; break;
} }
case '[': { /* `[' exp1 `]' */ case '[': { /* '[' exp1 ']' */
expdesc key; expdesc key;
luaK_exp2anyregup(fs, v); luaK_exp2anyregup(fs, v);
yindex(ls, &key); yindex(ls, &key);
luaK_indexed(fs, v, &key); luaK_indexed(fs, v, &key);
break; break;
} }
case ':': { /* `:' NAME funcargs */ case ':': { /* ':' NAME funcargs */
expdesc key; expdesc key;
luaX_next(ls); luaX_next(ls);
checkname(ls, &key); checkname(ls, &key);
@ -935,14 +927,19 @@ static void suffixedexp (LexState *ls, expdesc *v) {
static void simpleexp (LexState *ls, expdesc *v) { static void simpleexp (LexState *ls, expdesc *v) {
/* simpleexp -> NUMBER | STRING | NIL | TRUE | FALSE | ... | /* simpleexp -> FLT | INT | STRING | NIL | TRUE | FALSE | ... |
constructor | FUNCTION body | suffixedexp */ constructor | FUNCTION body | suffixedexp */
switch (ls->t.token) { switch (ls->t.token) {
case TK_NUMBER: { case TK_FLT: {
init_exp(v, VKNUM, 0); init_exp(v, VKFLT, 0);
v->u.nval = ls->t.seminfo.r; v->u.nval = ls->t.seminfo.r;
break; break;
} }
case TK_INT: {
init_exp(v, VKINT, 0);
v->u.ival = ls->t.seminfo.i;
break;
}
case TK_STRING: { case TK_STRING: {
codestring(ls, v, ls->t.seminfo.ts); codestring(ls, v, ls->t.seminfo.ts);
break; break;
@ -962,7 +959,8 @@ static void simpleexp (LexState *ls, expdesc *v) {
case TK_DOTS: { /* vararg */ case TK_DOTS: { /* vararg */
FuncState *fs = ls->fs; FuncState *fs = ls->fs;
check_condition(ls, fs->f->is_vararg, check_condition(ls, fs->f->is_vararg,
"cannot use " LUA_QL("...") " outside a vararg function"); "cannot use '...' outside a vararg function");
fs->f->is_vararg = 1; /* function actually uses vararg */
init_exp(v, VVARARG, luaK_codeABC(fs, OP_VARARG, 0, 1, 0)); init_exp(v, VVARARG, luaK_codeABC(fs, OP_VARARG, 0, 1, 0));
break; break;
} }
@ -988,6 +986,7 @@ static UnOpr getunopr (int op) {
switch (op) { switch (op) {
case TK_NOT: return OPR_NOT; case TK_NOT: return OPR_NOT;
case '-': return OPR_MINUS; case '-': return OPR_MINUS;
case '~': return OPR_BNOT;
case '#': return OPR_LEN; case '#': return OPR_LEN;
default: return OPR_NOUNOPR; default: return OPR_NOUNOPR;
} }
@ -999,9 +998,15 @@ static BinOpr getbinopr (int op) {
case '+': return OPR_ADD; case '+': return OPR_ADD;
case '-': return OPR_SUB; case '-': return OPR_SUB;
case '*': return OPR_MUL; case '*': return OPR_MUL;
case '/': return OPR_DIV;
case '%': return OPR_MOD; case '%': return OPR_MOD;
case '^': return OPR_POW; case '^': return OPR_POW;
case '/': return OPR_DIV;
case TK_IDIV: return OPR_IDIV;
case '&': return OPR_BAND;
case '|': return OPR_BOR;
case '~': return OPR_BXOR;
case TK_SHL: return OPR_SHL;
case TK_SHR: return OPR_SHR;
case TK_CONCAT: return OPR_CONCAT; case TK_CONCAT: return OPR_CONCAT;
case TK_NE: return OPR_NE; case TK_NE: return OPR_NE;
case TK_EQ: return OPR_EQ; case TK_EQ: return OPR_EQ;
@ -1020,19 +1025,24 @@ static const struct {
lu_byte left; /* left priority for each binary operator */ lu_byte left; /* left priority for each binary operator */
lu_byte right; /* right priority */ lu_byte right; /* right priority */
} priority[] = { /* ORDER OPR */ } priority[] = { /* ORDER OPR */
{6, 6}, {6, 6}, {7, 7}, {7, 7}, {7, 7}, /* `+' `-' `*' `/' `%' */ {10, 10}, {10, 10}, /* '+' '-' */
{10, 9}, {5, 4}, /* ^, .. (right associative) */ {11, 11}, {11, 11}, /* '*' '%' */
{3, 3}, {3, 3}, {3, 3}, /* ==, <, <= */ {14, 13}, /* '^' (right associative) */
{3, 3}, {3, 3}, {3, 3}, /* ~=, >, >= */ {11, 11}, {11, 11}, /* '/' '//' */
{2, 2}, {1, 1} /* and, or */ {6, 6}, {4, 4}, {5, 5}, /* '&' '|' '~' */
{7, 7}, {7, 7}, /* '<<' '>>' */
{9, 8}, /* '..' (right associative) */
{3, 3}, {3, 3}, {3, 3}, /* ==, <, <= */
{3, 3}, {3, 3}, {3, 3}, /* ~=, >, >= */
{2, 2}, {1, 1} /* and, or */
}; };
#define UNARY_PRIORITY 8 /* priority for unary operators */ #define UNARY_PRIORITY 12 /* priority for unary operators */
/* /*
** subexpr -> (simpleexp | unop subexpr) { binop subexpr } ** subexpr -> (simpleexp | unop subexpr) { binop subexpr }
** where `binop' is any binary operator with a priority higher than `limit' ** where 'binop' is any binary operator with a priority higher than 'limit'
*/ */
static BinOpr subexpr (LexState *ls, expdesc *v, int limit) { static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {
BinOpr op; BinOpr op;
@ -1046,7 +1056,7 @@ static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {
luaK_prefix(ls->fs, uop, v, line); luaK_prefix(ls->fs, uop, v, line);
} }
else simpleexp(ls, v); else simpleexp(ls, v);
/* expand while operators have priorities higher than `limit' */ /* expand while operators have priorities higher than 'limit' */
op = getbinopr(ls->t.token); op = getbinopr(ls->t.token);
while (op != OPR_NOBINOPR && priority[op].left > limit) { while (op != OPR_NOBINOPR && priority[op].left > limit) {
expdesc v2; expdesc v2;
@ -1146,7 +1156,7 @@ static void assignment (LexState *ls, struct LHS_assign *lh, int nvars) {
"C levels"); "C levels");
assignment(ls, &nv, nvars+1); assignment(ls, &nv, nvars+1);
} }
else { /* assignment -> `=' explist */ else { /* assignment -> '=' explist */
int nexps; int nexps;
checknext(ls, '='); checknext(ls, '=');
nexps = explist(ls, &e); nexps = explist(ls, &e);
@ -1170,7 +1180,7 @@ static int cond (LexState *ls) {
/* cond -> exp */ /* cond -> exp */
expdesc v; expdesc v;
expr(ls, &v); /* read condition */ expr(ls, &v); /* read condition */
if (v.k == VNIL) v.k = VFALSE; /* `falses' are all equal here */ if (v.k == VNIL) v.k = VFALSE; /* 'falses' are all equal here */
luaK_goiftrue(ls->fs, &v); luaK_goiftrue(ls->fs, &v);
return v.f; return v.f;
} }
@ -1195,9 +1205,9 @@ static void gotostat (LexState *ls, int pc) {
static void checkrepeated (FuncState *fs, Labellist *ll, TString *label) { static void checkrepeated (FuncState *fs, Labellist *ll, TString *label) {
int i; int i;
for (i = fs->bl->firstlabel; i < ll->n; i++) { for (i = fs->bl->firstlabel; i < ll->n; i++) {
if (luaS_eqstr(label, ll->arr[i].name)) { if (eqstr(label, ll->arr[i].name)) {
const char *msg = luaO_pushfstring(fs->ls->L, const char *msg = luaO_pushfstring(fs->ls->L,
"label " LUA_QS " already defined on line %d", "label '%s' already defined on line %d",
getstr(label), ll->arr[i].line); getstr(label), ll->arr[i].line);
semerror(fs->ls, msg); semerror(fs->ls, msg);
} }
@ -1220,7 +1230,7 @@ static void labelstat (LexState *ls, TString *label, int line) {
checkrepeated(fs, ll, label); /* check for repeated labels */ checkrepeated(fs, ll, label); /* check for repeated labels */
checknext(ls, TK_DBCOLON); /* skip double colon */ checknext(ls, TK_DBCOLON); /* skip double colon */
/* create new entry for this label */ /* create new entry for this label */
l = newlabelentry(ls, ll, label, line, fs->pc); l = newlabelentry(ls, ll, label, line, luaK_getlabel(fs));
skipnoopstat(ls); /* skip other no-op statements */ skipnoopstat(ls); /* skip other no-op statements */
if (block_follow(ls, 0)) { /* label is last no-op statement in the block? */ if (block_follow(ls, 0)) { /* label is last no-op statement in the block? */
/* assume that locals are already out of scope */ /* assume that locals are already out of scope */
@ -1321,7 +1331,7 @@ static void fornum (LexState *ls, TString *varname, int line) {
if (testnext(ls, ',')) if (testnext(ls, ','))
exp1(ls); /* optional step */ exp1(ls); /* optional step */
else { /* default step = 1 */ else { /* default step = 1 */
luaK_codek(fs, fs->freereg, luaK_numberK(fs, 1)); luaK_codek(fs, fs->freereg, luaK_intK(fs, 1));
luaK_reserveregs(fs, 1); luaK_reserveregs(fs, 1);
} }
forbody(ls, base, line, 1, 1); forbody(ls, base, line, 1, 1);
@ -1359,15 +1369,15 @@ static void forstat (LexState *ls, int line) {
TString *varname; TString *varname;
BlockCnt bl; BlockCnt bl;
enterblock(fs, &bl, 1); /* scope for loop and control variables */ enterblock(fs, &bl, 1); /* scope for loop and control variables */
luaX_next(ls); /* skip `for' */ luaX_next(ls); /* skip 'for' */
varname = str_checkname(ls); /* first variable name */ varname = str_checkname(ls); /* first variable name */
switch (ls->t.token) { switch (ls->t.token) {
case '=': fornum(ls, varname, line); break; case '=': fornum(ls, varname, line); break;
case ',': case TK_IN: forlist(ls, varname); break; case ',': case TK_IN: forlist(ls, varname); break;
default: luaX_syntaxerror(ls, LUA_QL("=") " or " LUA_QL("in") " expected"); default: luaX_syntaxerror(ls, "'=' or 'in' expected");
} }
check_match(ls, TK_END, TK_FOR, line); check_match(ls, TK_END, TK_FOR, line);
leaveblock(fs); /* loop scope (`break' jumps to this point) */ leaveblock(fs); /* loop scope ('break' jumps to this point) */
} }
@ -1397,7 +1407,7 @@ static void test_then_block (LexState *ls, int *escapelist) {
enterblock(fs, &bl, 0); enterblock(fs, &bl, 0);
jf = v.f; jf = v.f;
} }
statlist(ls); /* `then' part */ statlist(ls); /* 'then' part */
leaveblock(fs); leaveblock(fs);
if (ls->t.token == TK_ELSE || if (ls->t.token == TK_ELSE ||
ls->t.token == TK_ELSEIF) /* followed by 'else'/'elseif'? */ ls->t.token == TK_ELSEIF) /* followed by 'else'/'elseif'? */
@ -1414,7 +1424,7 @@ static void ifstat (LexState *ls, int line) {
while (ls->t.token == TK_ELSEIF) while (ls->t.token == TK_ELSEIF)
test_then_block(ls, &escapelist); /* ELSEIF cond THEN block */ test_then_block(ls, &escapelist); /* ELSEIF cond THEN block */
if (testnext(ls, TK_ELSE)) if (testnext(ls, TK_ELSE))
block(ls); /* `else' part */ block(ls); /* 'else' part */
check_match(ls, TK_END, TK_IF, line); check_match(ls, TK_END, TK_IF, line);
luaK_patchtohere(fs, escapelist); /* patch escape list to 'if' end */ luaK_patchtohere(fs, escapelist); /* patch escape list to 'if' end */
} }
@ -1432,7 +1442,7 @@ static void localfunc (LexState *ls) {
static void localstat (LexState *ls) { static void localstat (LexState *ls) {
/* stat -> LOCAL NAME {`,' NAME} [`=' explist] */ /* stat -> LOCAL NAME {',' NAME} ['=' explist] */
int nvars = 0; int nvars = 0;
int nexps; int nexps;
expdesc e; expdesc e;
@ -1452,7 +1462,7 @@ static void localstat (LexState *ls) {
static int funcname (LexState *ls, expdesc *v) { static int funcname (LexState *ls, expdesc *v) {
/* funcname -> NAME {fieldsel} [`:' NAME] */ /* funcname -> NAME {fieldsel} [':' NAME] */
int ismethod = 0; int ismethod = 0;
singlevar(ls, v); singlevar(ls, v);
while (ls->t.token == '.') while (ls->t.token == '.')
@ -1473,7 +1483,7 @@ static void funcstat (LexState *ls, int line) {
ismethod = funcname(ls, &v); ismethod = funcname(ls, &v);
body(ls, &b, ismethod, line); body(ls, &b, ismethod, line);
luaK_storevar(ls->fs, &v, &b); luaK_storevar(ls->fs, &v, &b);
luaK_fixline(ls->fs, line); /* definition `happens' in the first line */ luaK_fixline(ls->fs, line); /* definition "happens" in the first line */
} }
@ -1488,7 +1498,7 @@ static void exprstat (LexState *ls) {
} }
else { /* stat -> func */ else { /* stat -> func */
check_condition(ls, v.v.k == VCALL, "syntax error"); check_condition(ls, v.v.k == VCALL, "syntax error");
SETARG_C(getcode(fs, &v.v), 1); /* call statement uses no results */ SETARG_C(getinstruction(fs, &v.v), 1); /* call statement uses no results */
} }
} }
@ -1505,8 +1515,8 @@ static void retstat (LexState *ls) {
if (hasmultret(e.k)) { if (hasmultret(e.k)) {
luaK_setmultret(fs, &e); luaK_setmultret(fs, &e);
if (e.k == VCALL && nret == 1) { /* tail call? */ if (e.k == VCALL && nret == 1) { /* tail call? */
SET_OPCODE(getcode(fs,&e), OP_TAILCALL); SET_OPCODE(getinstruction(fs,&e), OP_TAILCALL);
lua_assert(GETARG_A(getcode(fs,&e)) == fs->nactvar); lua_assert(GETARG_A(getinstruction(fs,&e)) == fs->nactvar);
} }
first = fs->nactvar; first = fs->nactvar;
nret = LUA_MULTRET; /* return all values */ nret = LUA_MULTRET; /* return all values */
@ -1515,8 +1525,8 @@ static void retstat (LexState *ls) {
if (nret == 1) /* only one single value? */ if (nret == 1) /* only one single value? */
first = luaK_exp2anyreg(fs, &e); first = luaK_exp2anyreg(fs, &e);
else { else {
luaK_exp2nextreg(fs, &e); /* values must go to the `stack' */ luaK_exp2nextreg(fs, &e); /* values must go to the stack */
first = fs->nactvar; /* return all `active' values */ first = fs->nactvar; /* return all active values */
lua_assert(nret == fs->freereg - first); lua_assert(nret == fs->freereg - first);
} }
} }
@ -1605,7 +1615,7 @@ static void mainfunc (LexState *ls, FuncState *fs) {
BlockCnt bl; BlockCnt bl;
expdesc v; expdesc v;
open_func(ls, fs, &bl); open_func(ls, fs, &bl);
fs->f->is_vararg = 1; /* main function is always vararg */ fs->f->is_vararg = 2; /* main function is always declared vararg */
init_exp(&v, VLOCAL, 0); /* create and... */ init_exp(&v, VLOCAL, 0); /* create and... */
newupvalue(fs, ls->envn, &v); /* ...set environment upvalue */ newupvalue(fs, ls->envn, &v); /* ...set environment upvalue */
luaX_next(ls); /* read first token */ luaX_next(ls); /* read first token */
@ -1615,16 +1625,19 @@ static void mainfunc (LexState *ls, FuncState *fs) {
} }
Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff, LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
Dyndata *dyd, const char *name, int firstchar) { Dyndata *dyd, const char *name, int firstchar) {
LexState lexstate; LexState lexstate;
FuncState funcstate; FuncState funcstate;
Closure *cl = luaF_newLclosure(L, 1); /* create main closure */ LClosure *cl = luaF_newLclosure(L, 1); /* create main closure */
/* anchor closure (to avoid being collected) */ setclLvalue(L, L->top, cl); /* anchor it (to avoid being collected) */
setclLvalue(L, L->top, cl); luaD_inctop(L);
incr_top(L); lexstate.h = luaH_new(L); /* create table for scanner */
funcstate.f = cl->l.p = luaF_newproto(L); sethvalue(L, L->top, lexstate.h); /* anchor it */
luaD_inctop(L);
funcstate.f = cl->p = luaF_newproto(L);
funcstate.f->source = luaS_new(L, name); /* create and anchor TString */ funcstate.f->source = luaS_new(L, name); /* create and anchor TString */
lua_assert(iswhite(funcstate.f)); /* do not need barrier here */
lexstate.buff = buff; lexstate.buff = buff;
lexstate.dyd = dyd; lexstate.dyd = dyd;
dyd->actvar.n = dyd->gt.n = dyd->label.n = 0; dyd->actvar.n = dyd->gt.n = dyd->label.n = 0;
@ -1633,6 +1646,7 @@ Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
lua_assert(!funcstate.prev && funcstate.nups == 1 && !lexstate.fs); lua_assert(!funcstate.prev && funcstate.nups == 1 && !lexstate.fs);
/* all scopes should be correctly finished */ /* all scopes should be correctly finished */
lua_assert(dyd->actvar.n == 0 && dyd->gt.n == 0 && dyd->label.n == 0); lua_assert(dyd->actvar.n == 0 && dyd->gt.n == 0 && dyd->label.n == 0);
return cl; /* it's on the stack too */ L->top--; /* remove scanner's table */
return cl; /* closure is on the stack, too */
} }

@ -1,16 +1,18 @@
/* /*
** $Id: lstate.c,v 2.99.1.2 2013/11/08 17:45:31 roberto Exp $ ** $Id: lstate.c,v 2.133 2015/11/13 12:16:51 roberto Exp $
** Global State ** Global State
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define lstate_c
#define LUA_CORE
#include "lprefix.h"
#include <stddef.h> #include <stddef.h>
#include <string.h> #include <string.h>
#define lstate_c
#define LUA_CORE
#include "lua.h" #include "lua.h"
#include "lapi.h" #include "lapi.h"
@ -30,18 +32,11 @@
#define LUAI_GCPAUSE 200 /* 200% */ #define LUAI_GCPAUSE 200 /* 200% */
#endif #endif
#if !defined(LUAI_GCMAJOR)
#define LUAI_GCMAJOR 200 /* 200% */
#endif
#if !defined(LUAI_GCMUL) #if !defined(LUAI_GCMUL)
#define LUAI_GCMUL 200 /* GC runs 'twice the speed' of memory allocation */ #define LUAI_GCMUL 200 /* GC runs 'twice the speed' of memory allocation */
#endif #endif
#define MEMERRMSG "not enough memory"
/* /*
** a macro to help the creation of a unique random seed when a state is ** a macro to help the creation of a unique random seed when a state is
** created; the seed is used to randomize hashes. ** created; the seed is used to randomize hashes.
@ -57,9 +52,7 @@
** thread state + extra space ** thread state + extra space
*/ */
typedef struct LX { typedef struct LX {
#if defined(LUAI_EXTRASPACE) lu_byte extra_[LUA_EXTRASPACE];
char buff[LUAI_EXTRASPACE];
#endif
lua_State l; lua_State l;
} LX; } LX;
@ -78,13 +71,12 @@ typedef struct LG {
/* /*
** Compute an initial seed as random as possible. In ANSI, rely on ** Compute an initial seed as random as possible. Rely on Address Space
** Address Space Layout Randomization (if present) to increase ** Layout Randomization (if present) to increase randomness..
** randomness..
*/ */
#define addbuff(b,p,e) \ #define addbuff(b,p,e) \
{ size_t t = cast(size_t, e); \ { size_t t = cast(size_t, e); \
memcpy(buff + p, &t, sizeof(t)); p += sizeof(t); } memcpy(b + p, &t, sizeof(t)); p += sizeof(t); }
static unsigned int makeseed (lua_State *L) { static unsigned int makeseed (lua_State *L) {
char buff[4 * sizeof(size_t)]; char buff[4 * sizeof(size_t)];
@ -101,10 +93,14 @@ static unsigned int makeseed (lua_State *L) {
/* /*
** set GCdebt to a new value keeping the value (totalbytes + GCdebt) ** set GCdebt to a new value keeping the value (totalbytes + GCdebt)
** invariant ** invariant (and avoiding underflows in 'totalbytes')
*/ */
void luaE_setdebt (global_State *g, l_mem debt) { void luaE_setdebt (global_State *g, l_mem debt) {
g->totalbytes -= (debt - g->GCdebt); l_mem tb = gettotalbytes(g);
lua_assert(tb > 0);
if (debt < tb - MAX_LMEM)
debt = tb - MAX_LMEM; /* will make 'totalbytes == MAX_LMEM' */
g->totalbytes = tb - debt;
g->GCdebt = debt; g->GCdebt = debt;
} }
@ -115,10 +111,14 @@ CallInfo *luaE_extendCI (lua_State *L) {
L->ci->next = ci; L->ci->next = ci;
ci->previous = L->ci; ci->previous = L->ci;
ci->next = NULL; ci->next = NULL;
L->nci++;
return ci; return ci;
} }
/*
** free all CallInfo structures not in use by a thread
*/
void luaE_freeCI (lua_State *L) { void luaE_freeCI (lua_State *L) {
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
CallInfo *next = ci->next; CallInfo *next = ci->next;
@ -126,6 +126,24 @@ void luaE_freeCI (lua_State *L) {
while ((ci = next) != NULL) { while ((ci = next) != NULL) {
next = ci->next; next = ci->next;
luaM_free(L, ci); luaM_free(L, ci);
L->nci--;
}
}
/*
** free half of the CallInfo structures not in use by a thread
*/
void luaE_shrinkCI (lua_State *L) {
CallInfo *ci = L->ci;
CallInfo *next2; /* next's next */
/* while there are two nexts */
while (ci->next != NULL && (next2 = ci->next->next) != NULL) {
luaM_free(L, ci->next); /* free next */
L->nci--;
ci->next = next2; /* remove 'next' from the list */
next2->previous = ci;
ci = next2; /* keep next's next */
} }
} }
@ -155,6 +173,7 @@ static void freestack (lua_State *L) {
return; /* stack not completely built yet */ return; /* stack not completely built yet */
L->ci = &L->base_ci; /* free the entire 'ci' list */ L->ci = &L->base_ci; /* free the entire 'ci' list */
luaE_freeCI(L); luaE_freeCI(L);
lua_assert(L->nci == 0);
luaM_freearray(L, L->stack, L->stacksize); /* free stack array */ luaM_freearray(L, L->stack, L->stacksize); /* free stack array */
} }
@ -163,34 +182,32 @@ static void freestack (lua_State *L) {
** Create registry table and its predefined values ** Create registry table and its predefined values
*/ */
static void init_registry (lua_State *L, global_State *g) { static void init_registry (lua_State *L, global_State *g) {
TValue mt; TValue temp;
/* create registry */ /* create registry */
Table *registry = luaH_new(L); Table *registry = luaH_new(L);
sethvalue(L, &g->l_registry, registry); sethvalue(L, &g->l_registry, registry);
luaH_resize(L, registry, LUA_RIDX_LAST, 0); luaH_resize(L, registry, LUA_RIDX_LAST, 0);
/* registry[LUA_RIDX_MAINTHREAD] = L */ /* registry[LUA_RIDX_MAINTHREAD] = L */
setthvalue(L, &mt, L); setthvalue(L, &temp, L); /* temp = L */
luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &mt); luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &temp);
/* registry[LUA_RIDX_GLOBALS] = table of globals */ /* registry[LUA_RIDX_GLOBALS] = table of globals */
sethvalue(L, &mt, luaH_new(L)); sethvalue(L, &temp, luaH_new(L)); /* temp = new table (global table) */
luaH_setint(L, registry, LUA_RIDX_GLOBALS, &mt); luaH_setint(L, registry, LUA_RIDX_GLOBALS, &temp);
} }
/* /*
** open parts of the state that may cause memory-allocation errors ** open parts of the state that may cause memory-allocation errors.
** ('g->version' != NULL flags that the state was completely build)
*/ */
static void f_luaopen (lua_State *L, void *ud) { static void f_luaopen (lua_State *L, void *ud) {
global_State *g = G(L); global_State *g = G(L);
UNUSED(ud); UNUSED(ud);
stack_init(L, L); /* init stack */ stack_init(L, L); /* init stack */
init_registry(L, g); init_registry(L, g);
luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */ luaS_init(L);
luaT_init(L); luaT_init(L);
luaX_init(L); luaX_init(L);
/* pre-create memory-error message */
g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
luaS_fix(g->memerrmsg); /* it should never be collected */
g->gcrunning = 1; /* allow gc */ g->gcrunning = 1; /* allow gc */
g->version = lua_version(NULL); g->version = lua_version(NULL);
luai_userstateopen(L); luai_userstateopen(L);
@ -198,14 +215,16 @@ static void f_luaopen (lua_State *L, void *ud) {
/* /*
** preinitialize a state with consistent values without allocating ** preinitialize a thread with consistent values without allocating
** any memory (to avoid errors) ** any memory (to avoid errors)
*/ */
static void preinit_state (lua_State *L, global_State *g) { static void preinit_thread (lua_State *L, global_State *g) {
G(L) = g; G(L) = g;
L->stack = NULL; L->stack = NULL;
L->ci = NULL; L->ci = NULL;
L->nci = 0;
L->stacksize = 0; L->stacksize = 0;
L->twups = L; /* thread has no upvalues */
L->errorJmp = NULL; L->errorJmp = NULL;
L->nCcalls = 0; L->nCcalls = 0;
L->hook = NULL; L->hook = NULL;
@ -227,7 +246,6 @@ static void close_state (lua_State *L) {
if (g->version) /* closing a fully built state? */ if (g->version) /* closing a fully built state? */
luai_userstateclose(L); luai_userstateclose(L);
luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size); luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
luaZ_freebuffer(L, &g->buff);
freestack(L); freestack(L);
lua_assert(gettotalbytes(g) == sizeof(LG)); lua_assert(gettotalbytes(g) == sizeof(LG));
(*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0); /* free main block */ (*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0); /* free main block */
@ -235,17 +253,28 @@ static void close_state (lua_State *L) {
LUA_API lua_State *lua_newthread (lua_State *L) { LUA_API lua_State *lua_newthread (lua_State *L) {
global_State *g = G(L);
lua_State *L1; lua_State *L1;
lua_lock(L); lua_lock(L);
luaC_checkGC(L); luaC_checkGC(L);
L1 = &luaC_newobj(L, LUA_TTHREAD, sizeof(LX), NULL, offsetof(LX, l))->th; /* create new thread */
L1 = &cast(LX *, luaM_newobject(L, LUA_TTHREAD, sizeof(LX)))->l;
L1->marked = luaC_white(g);
L1->tt = LUA_TTHREAD;
/* link it on list 'allgc' */
L1->next = g->allgc;
g->allgc = obj2gco(L1);
/* anchor it on L stack */
setthvalue(L, L->top, L1); setthvalue(L, L->top, L1);
api_incr_top(L); api_incr_top(L);
preinit_state(L1, G(L)); preinit_thread(L1, g);
L1->hookmask = L->hookmask; L1->hookmask = L->hookmask;
L1->basehookcount = L->basehookcount; L1->basehookcount = L->basehookcount;
L1->hook = L->hook; L1->hook = L->hook;
resethookcount(L1); resethookcount(L1);
/* initialize L1 extra space */
memcpy(lua_getextraspace(L1), lua_getextraspace(g->mainthread),
LUA_EXTRASPACE);
luai_userstatethread(L, L1); luai_userstatethread(L, L1);
stack_init(L1, L); /* init stack */ stack_init(L1, L); /* init stack */
lua_unlock(L); lua_unlock(L);
@ -273,36 +302,31 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
g = &l->g; g = &l->g;
L->next = NULL; L->next = NULL;
L->tt = LUA_TTHREAD; L->tt = LUA_TTHREAD;
g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT); g->currentwhite = bitmask(WHITE0BIT);
L->marked = luaC_white(g); L->marked = luaC_white(g);
g->gckind = KGC_NORMAL; preinit_thread(L, g);
preinit_state(L, g);
g->frealloc = f; g->frealloc = f;
g->ud = ud; g->ud = ud;
g->mainthread = L; g->mainthread = L;
g->seed = makeseed(L); g->seed = makeseed(L);
g->uvhead.u.l.prev = &g->uvhead;
g->uvhead.u.l.next = &g->uvhead;
g->gcrunning = 0; /* no GC while building state */ g->gcrunning = 0; /* no GC while building state */
g->GCestimate = 0; g->GCestimate = 0;
g->strt.size = 0; g->strt.size = g->strt.nuse = 0;
g->strt.nuse = 0;
g->strt.hash = NULL; g->strt.hash = NULL;
setnilvalue(&g->l_registry); setnilvalue(&g->l_registry);
luaZ_initbuffer(L, &g->buff);
g->panic = NULL; g->panic = NULL;
g->version = NULL; g->version = NULL;
g->gcstate = GCSpause; g->gcstate = GCSpause;
g->allgc = NULL; g->gckind = KGC_NORMAL;
g->finobj = NULL; g->allgc = g->finobj = g->tobefnz = g->fixedgc = NULL;
g->tobefnz = NULL; g->sweepgc = NULL;
g->sweepgc = g->sweepfin = NULL;
g->gray = g->grayagain = NULL; g->gray = g->grayagain = NULL;
g->weak = g->ephemeron = g->allweak = NULL; g->weak = g->ephemeron = g->allweak = NULL;
g->twups = NULL;
g->totalbytes = sizeof(LG); g->totalbytes = sizeof(LG);
g->GCdebt = 0; g->GCdebt = 0;
g->gcfinnum = 0;
g->gcpause = LUAI_GCPAUSE; g->gcpause = LUAI_GCPAUSE;
g->gcmajorinc = LUAI_GCMAJOR;
g->gcstepmul = LUAI_GCMUL; g->gcstepmul = LUAI_GCMUL;
for (i=0; i < LUA_NUMTAGS; i++) g->mt[i] = NULL; for (i=0; i < LUA_NUMTAGS; i++) g->mt[i] = NULL;
if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) { if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) {

@ -1,23 +1,30 @@
/* /*
** $Id: lstring.c,v 2.26.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lstring.c,v 2.56 2015/11/23 11:32:51 roberto Exp $
** String table (keeps all strings handled by Lua) ** String table (keeps all strings handled by Lua)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <string.h>
#define lstring_c #define lstring_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include <string.h>
#include "lua.h" #include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lmem.h" #include "lmem.h"
#include "lobject.h" #include "lobject.h"
#include "lstate.h" #include "lstate.h"
#include "lstring.h" #include "lstring.h"
#define MEMERRMSG "not enough memory"
/* /*
** Lua will use at most ~(2^LUAI_HASHLIMIT) bytes from a string to ** Lua will use at most ~(2^LUAI_HASHLIMIT) bytes from a string to
** compute its hash ** compute its hash
@ -31,99 +38,126 @@
** equality for long strings ** equality for long strings
*/ */
int luaS_eqlngstr (TString *a, TString *b) { int luaS_eqlngstr (TString *a, TString *b) {
size_t len = a->tsv.len; size_t len = a->u.lnglen;
lua_assert(a->tsv.tt == LUA_TLNGSTR && b->tsv.tt == LUA_TLNGSTR); lua_assert(a->tt == LUA_TLNGSTR && b->tt == LUA_TLNGSTR);
return (a == b) || /* same instance or... */ return (a == b) || /* same instance or... */
((len == b->tsv.len) && /* equal length and ... */ ((len == b->u.lnglen) && /* equal length and ... */
(memcmp(getstr(a), getstr(b), len) == 0)); /* equal contents */ (memcmp(getstr(a), getstr(b), len) == 0)); /* equal contents */
} }
/*
** equality for strings
*/
int luaS_eqstr (TString *a, TString *b) {
return (a->tsv.tt == b->tsv.tt) &&
(a->tsv.tt == LUA_TSHRSTR ? eqshrstr(a, b) : luaS_eqlngstr(a, b));
}
unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) { unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
unsigned int h = seed ^ cast(unsigned int, l); unsigned int h = seed ^ cast(unsigned int, l);
size_t l1;
size_t step = (l >> LUAI_HASHLIMIT) + 1; size_t step = (l >> LUAI_HASHLIMIT) + 1;
for (l1 = l; l1 >= step; l1 -= step) for (; l >= step; l -= step)
h = h ^ ((h<<5) + (h>>2) + cast_byte(str[l1 - 1])); h ^= ((h<<5) + (h>>2) + cast_byte(str[l - 1]));
return h; return h;
} }
unsigned int luaS_hashlongstr (TString *ts) {
lua_assert(ts->tt == LUA_TLNGSTR);
if (ts->extra == 0) { /* no hash? */
ts->hash = luaS_hash(getstr(ts), ts->u.lnglen, ts->hash);
ts->extra = 1; /* now it has its hash */
}
return ts->hash;
}
/* /*
** resizes the string table ** resizes the string table
*/ */
void luaS_resize (lua_State *L, int newsize) { void luaS_resize (lua_State *L, int newsize) {
int i; int i;
stringtable *tb = &G(L)->strt; stringtable *tb = &G(L)->strt;
/* cannot resize while GC is traversing strings */ if (newsize > tb->size) { /* grow table if needed */
luaC_runtilstate(L, ~bitmask(GCSsweepstring)); luaM_reallocvector(L, tb->hash, tb->size, newsize, TString *);
if (newsize > tb->size) { for (i = tb->size; i < newsize; i++)
luaM_reallocvector(L, tb->hash, tb->size, newsize, GCObject *); tb->hash[i] = NULL;
for (i = tb->size; i < newsize; i++) tb->hash[i] = NULL;
} }
/* rehash */ for (i = 0; i < tb->size; i++) { /* rehash */
for (i=0; i<tb->size; i++) { TString *p = tb->hash[i];
GCObject *p = tb->hash[i];
tb->hash[i] = NULL; tb->hash[i] = NULL;
while (p) { /* for each node in the list */ while (p) { /* for each node in the list */
GCObject *next = gch(p)->next; /* save next */ TString *hnext = p->u.hnext; /* save next */
unsigned int h = lmod(gco2ts(p)->hash, newsize); /* new position */ unsigned int h = lmod(p->hash, newsize); /* new position */
gch(p)->next = tb->hash[h]; /* chain it */ p->u.hnext = tb->hash[h]; /* chain it */
tb->hash[h] = p; tb->hash[h] = p;
resetoldbit(p); /* see MOVE OLD rule */ p = hnext;
p = next;
} }
} }
if (newsize < tb->size) { if (newsize < tb->size) { /* shrink table if needed */
/* shrinking slice must be empty */ /* vanishing slice should be empty */
lua_assert(tb->hash[newsize] == NULL && tb->hash[tb->size - 1] == NULL); lua_assert(tb->hash[newsize] == NULL && tb->hash[tb->size - 1] == NULL);
luaM_reallocvector(L, tb->hash, tb->size, newsize, GCObject *); luaM_reallocvector(L, tb->hash, tb->size, newsize, TString *);
} }
tb->size = newsize; tb->size = newsize;
} }
/*
** Clear API string cache. (Entries cannot be empty, so fill them with
** a non-collectable string.)
*/
void luaS_clearcache (global_State *g) {
int i, j;
for (i = 0; i < STRCACHE_N; i++)
for (j = 0; j < STRCACHE_M; j++) {
if (iswhite(g->strcache[i][j])) /* will entry be collected? */
g->strcache[i][j] = g->memerrmsg; /* replace it with something fixed */
}
}
/*
** Initialize the string table and the string cache
*/
void luaS_init (lua_State *L) {
global_State *g = G(L);
int i, j;
luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */
/* pre-create memory-error message */
g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
luaC_fix(L, obj2gco(g->memerrmsg)); /* it should never be collected */
for (i = 0; i < STRCACHE_N; i++) /* fill cache with valid strings */
for (j = 0; j < STRCACHE_M; j++)
g->strcache[i][j] = g->memerrmsg;
}
/* /*
** creates a new string object ** creates a new string object
*/ */
static TString *createstrobj (lua_State *L, const char *str, size_t l, static TString *createstrobj (lua_State *L, size_t l, int tag, unsigned int h) {
int tag, unsigned int h, GCObject **list) {
TString *ts; TString *ts;
GCObject *o;
size_t totalsize; /* total size of TString object */ size_t totalsize; /* total size of TString object */
totalsize = sizeof(TString) + ((l + 1) * sizeof(char)); totalsize = sizelstring(l);
ts = &luaC_newobj(L, tag, totalsize, list, 0)->ts; o = luaC_newobj(L, tag, totalsize);
ts->tsv.len = l; ts = gco2ts(o);
ts->tsv.hash = h; ts->hash = h;
ts->tsv.extra = 0; ts->extra = 0;
memcpy(ts+1, str, l*sizeof(char)); getstr(ts)[l] = '\0'; /* ending 0 */
((char *)(ts+1))[l] = '\0'; /* ending 0 */
return ts; return ts;
} }
/* TString *luaS_createlngstrobj (lua_State *L, size_t l) {
** creates a new short string, inserting it into string table TString *ts = createstrobj(L, l, LUA_TLNGSTR, G(L)->seed);
*/ ts->u.lnglen = l;
static TString *newshrstr (lua_State *L, const char *str, size_t l, return ts;
unsigned int h) { }
GCObject **list; /* (pointer to) list where it will be inserted */
void luaS_remove (lua_State *L, TString *ts) {
stringtable *tb = &G(L)->strt; stringtable *tb = &G(L)->strt;
TString *s; TString **p = &tb->hash[lmod(ts->hash, tb->size)];
if (tb->nuse >= cast(lu_int32, tb->size) && tb->size <= MAX_INT/2) while (*p != ts) /* find previous element */
luaS_resize(L, tb->size*2); /* too crowded */ p = &(*p)->u.hnext;
list = &tb->hash[lmod(h, tb->size)]; *p = (*p)->u.hnext; /* remove element from its list */
s = createstrobj(L, str, l, LUA_TSHRSTR, h, list); tb->nuse--;
tb->nuse++;
return s;
} }
@ -131,22 +165,31 @@ static TString *newshrstr (lua_State *L, const char *str, size_t l,
** checks whether short string exists and reuses it or creates a new one ** checks whether short string exists and reuses it or creates a new one
*/ */
static TString *internshrstr (lua_State *L, const char *str, size_t l) { static TString *internshrstr (lua_State *L, const char *str, size_t l) {
GCObject *o; TString *ts;
global_State *g = G(L); global_State *g = G(L);
unsigned int h = luaS_hash(str, l, g->seed); unsigned int h = luaS_hash(str, l, g->seed);
for (o = g->strt.hash[lmod(h, g->strt.size)]; TString **list = &g->strt.hash[lmod(h, g->strt.size)];
o != NULL; lua_assert(str != NULL); /* otherwise 'memcmp'/'memcpy' are undefined */
o = gch(o)->next) { for (ts = *list; ts != NULL; ts = ts->u.hnext) {
TString *ts = rawgco2ts(o); if (l == ts->shrlen &&
if (h == ts->tsv.hash &&
l == ts->tsv.len &&
(memcmp(str, getstr(ts), l * sizeof(char)) == 0)) { (memcmp(str, getstr(ts), l * sizeof(char)) == 0)) {
if (isdead(G(L), o)) /* string is dead (but was not collected yet)? */ /* found! */
changewhite(o); /* resurrect it */ if (isdead(g, ts)) /* dead (but not collected yet)? */
changewhite(ts); /* resurrect it */
return ts; return ts;
} }
} }
return newshrstr(L, str, l, h); /* not found; create a new string */ if (g->strt.nuse >= g->strt.size && g->strt.size <= MAX_INT/2) {
luaS_resize(L, g->strt.size * 2);
list = &g->strt.hash[lmod(h, g->strt.size)]; /* recompute with new size */
}
ts = createstrobj(L, l, LUA_TSHRSTR, h);
memcpy(getstr(ts), str, l * sizeof(char));
ts->shrlen = cast_byte(l);
ts->u.hnext = *list;
*list = ts;
g->strt.nuse++;
return ts;
} }
@ -157,29 +200,49 @@ TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
if (l <= LUAI_MAXSHORTLEN) /* short string? */ if (l <= LUAI_MAXSHORTLEN) /* short string? */
return internshrstr(L, str, l); return internshrstr(L, str, l);
else { else {
if (l + 1 > (MAX_SIZET - sizeof(TString))/sizeof(char)) TString *ts;
if (l >= (MAX_SIZE - sizeof(TString))/sizeof(char))
luaM_toobig(L); luaM_toobig(L);
return createstrobj(L, str, l, LUA_TLNGSTR, G(L)->seed, NULL); ts = luaS_createlngstrobj(L, l);
memcpy(getstr(ts), str, l * sizeof(char));
return ts;
} }
} }
/* /*
** new zero-terminated string ** Create or reuse a zero-terminated string, first checking in the
** cache (using the string address as a key). The cache can contain
** only zero-terminated strings, so it is safe to use 'strcmp' to
** check hits.
*/ */
TString *luaS_new (lua_State *L, const char *str) { TString *luaS_new (lua_State *L, const char *str) {
return luaS_newlstr(L, str, strlen(str)); unsigned int i = point2uint(str) % STRCACHE_N; /* hash */
int j;
TString **p = G(L)->strcache[i];
for (j = 0; j < STRCACHE_M; j++) {
if (strcmp(str, getstr(p[j])) == 0) /* hit? */
return p[j]; /* that is it */
}
/* normal route */
for (j = STRCACHE_M - 1; j > 0; j--)
p[j] = p[j - 1]; /* move out last element */
/* new element is first in the list */
p[0] = luaS_newlstr(L, str, strlen(str));
return p[0];
} }
Udata *luaS_newudata (lua_State *L, size_t s, Table *e) { Udata *luaS_newudata (lua_State *L, size_t s) {
Udata *u; Udata *u;
if (s > MAX_SIZET - sizeof(Udata)) GCObject *o;
if (s > MAX_SIZE - sizeof(Udata))
luaM_toobig(L); luaM_toobig(L);
u = &luaC_newobj(L, LUA_TUSERDATA, sizeof(Udata) + s, NULL, 0)->u; o = luaC_newobj(L, LUA_TUSERDATA, sizeludata(s));
u->uv.len = s; u = gco2u(o);
u->uv.metatable = NULL; u->len = s;
u->uv.env = e; u->metatable = NULL;
setuservalue(L, u, luaO_nilobject);
return u; return u;
} }

File diff suppressed because it is too large Load Diff

@ -1,27 +1,30 @@
/* /*
** $Id: ltable.c,v 2.72.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: ltable.c,v 2.117 2015/11/19 19:16:22 roberto Exp $
** Lua tables (hash) ** Lua tables (hash)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define ltable_c
#define LUA_CORE
#include "lprefix.h"
/* /*
** Implementation of tables (aka arrays, objects, or hash tables). ** Implementation of tables (aka arrays, objects, or hash tables).
** Tables keep its elements in two parts: an array part and a hash part. ** Tables keep its elements in two parts: an array part and a hash part.
** Non-negative integer keys are all candidates to be kept in the array ** Non-negative integer keys are all candidates to be kept in the array
** part. The actual size of the array is the largest `n' such that at ** part. The actual size of the array is the largest 'n' such that
** least half the slots between 0 and n are in use. ** more than half the slots between 1 and n are in use.
** Hash uses a mix of chained scatter table with Brent's variation. ** Hash uses a mix of chained scatter table with Brent's variation.
** A main invariant of these tables is that, if an element is not ** A main invariant of these tables is that, if an element is not
** in its main position (i.e. the `original' position that its hash gives ** in its main position (i.e. the 'original' position that its hash gives
** to it), then the colliding element is in its own main position. ** to it), then the colliding element is in its own main position.
** Hence even when the load factor reaches 100%, performance remains good. ** Hence even when the load factor reaches 100%, performance remains good.
*/ */
#include <string.h> #include <math.h>
#include <limits.h>
#define ltable_c
#define LUA_CORE
#include "lua.h" #include "lua.h"
@ -37,21 +40,26 @@
/* /*
** max size of array part is 2^MAXBITS ** Maximum size of array part (MAXASIZE) is 2^MAXABITS. MAXABITS is
** the largest integer such that MAXASIZE fits in an unsigned int.
*/ */
#if LUAI_BITSINT >= 32 #define MAXABITS cast_int(sizeof(int) * CHAR_BIT - 1)
#define MAXBITS 30 #define MAXASIZE (1u << MAXABITS)
#else
#define MAXBITS (LUAI_BITSINT-2)
#endif
#define MAXASIZE (1 << MAXBITS) /*
** Maximum size of hash part is 2^MAXHBITS. MAXHBITS is the largest
** integer such that 2^MAXHBITS fits in a signed int. (Note that the
** maximum number of elements in a table, 2^MAXABITS + 2^MAXHBITS, still
** fits comfortably in an unsigned int.)
*/
#define MAXHBITS (MAXABITS - 1)
#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t)))) #define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t))))
#define hashstr(t,str) hashpow2(t, (str)->tsv.hash) #define hashstr(t,str) hashpow2(t, (str)->hash)
#define hashboolean(t,p) hashpow2(t, p) #define hashboolean(t,p) hashpow2(t, p)
#define hashint(t,i) hashpow2(t, i)
/* /*
@ -61,7 +69,7 @@
#define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1)))) #define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1))))
#define hashpointer(t,p) hashmod(t, IntPoint(p)) #define hashpointer(t,p) hashmod(t, point2uint(p))
#define dummynode (&dummynode_) #define dummynode (&dummynode_)
@ -70,44 +78,54 @@
static const Node dummynode_ = { static const Node dummynode_ = {
{NILCONSTANT}, /* value */ {NILCONSTANT}, /* value */
{{NILCONSTANT, NULL}} /* key */ {{NILCONSTANT, 0}} /* key */
}; };
/* /*
** hash for lua_Numbers ** Hash for floating-point numbers.
** The main computation should be just
** n = frexp(n, &i); return (n * INT_MAX) + i
** but there are some numerical subtleties.
** In a two-complement representation, INT_MAX does not has an exact
** representation as a float, but INT_MIN does; because the absolute
** value of 'frexp' is smaller than 1 (unless 'n' is inf/NaN), the
** absolute value of the product 'frexp * -INT_MIN' is smaller or equal
** to INT_MAX. Next, the use of 'unsigned int' avoids overflows when
** adding 'i'; the use of '~u' (instead of '-u') avoids problems with
** INT_MIN.
*/ */
static Node *hashnum (const Table *t, lua_Number n) { #if !defined(l_hashfloat)
static int l_hashfloat (lua_Number n) {
int i; int i;
luai_hashnum(i, n); lua_Integer ni;
if (i < 0) { n = l_mathop(frexp)(n, &i) * -cast_num(INT_MIN);
if (cast(unsigned int, i) == 0u - i) /* use unsigned to avoid overflows */ if (!lua_numbertointeger(n, &ni)) { /* is 'n' inf/-inf/NaN? */
i = 0; /* handle INT_MIN */ lua_assert(luai_numisnan(n) || l_mathop(fabs)(n) == cast_num(HUGE_VAL));
i = -i; /* must be a positive value */ return 0;
}
else { /* normal case */
unsigned int u = cast(unsigned int, i) + cast(unsigned int, ni);
return cast_int(u <= cast(unsigned int, INT_MAX) ? u : ~u);
} }
return hashmod(t, i);
} }
#endif
/* /*
** returns the `main' position of an element in a table (that is, the index ** returns the 'main' position of an element in a table (that is, the index
** of its hash value) ** of its hash value)
*/ */
static Node *mainposition (const Table *t, const TValue *key) { static Node *mainposition (const Table *t, const TValue *key) {
switch (ttype(key)) { switch (ttype(key)) {
case LUA_TNUMBER: case LUA_TNUMINT:
return hashnum(t, nvalue(key)); return hashint(t, ivalue(key));
case LUA_TLNGSTR: { case LUA_TNUMFLT:
TString *s = rawtsvalue(key); return hashmod(t, l_hashfloat(fltvalue(key)));
if (s->tsv.extra == 0) { /* no hash? */
s->tsv.hash = luaS_hash(getstr(s), s->tsv.len, s->tsv.hash);
s->tsv.extra = 1; /* now it has its hash */
}
return hashstr(t, rawtsvalue(key));
}
case LUA_TSHRSTR: case LUA_TSHRSTR:
return hashstr(t, rawtsvalue(key)); return hashstr(t, tsvalue(key));
case LUA_TLNGSTR:
return hashpow2(t, luaS_hashlongstr(tsvalue(key)));
case LUA_TBOOLEAN: case LUA_TBOOLEAN:
return hashboolean(t, bvalue(key)); return hashboolean(t, bvalue(key));
case LUA_TLIGHTUSERDATA: case LUA_TLIGHTUSERDATA:
@ -115,67 +133,68 @@ static Node *mainposition (const Table *t, const TValue *key) {
case LUA_TLCF: case LUA_TLCF:
return hashpointer(t, fvalue(key)); return hashpointer(t, fvalue(key));
default: default:
lua_assert(!ttisdeadkey(key));
return hashpointer(t, gcvalue(key)); return hashpointer(t, gcvalue(key));
} }
} }
/* /*
** returns the index for `key' if `key' is an appropriate key to live in ** returns the index for 'key' if 'key' is an appropriate key to live in
** the array part of the table, -1 otherwise. ** the array part of the table, 0 otherwise.
*/ */
static int arrayindex (const TValue *key) { static unsigned int arrayindex (const TValue *key) {
if (ttisnumber(key)) { if (ttisinteger(key)) {
lua_Number n = nvalue(key); lua_Integer k = ivalue(key);
int k; if (0 < k && (lua_Unsigned)k <= MAXASIZE)
lua_number2int(k, n); return cast(unsigned int, k); /* 'key' is an appropriate array index */
if (luai_numeq(cast_num(k), n))
return k;
} }
return -1; /* `key' did not match some condition */ return 0; /* 'key' did not match some condition */
} }
/* /*
** returns the index of a `key' for table traversals. First goes all ** returns the index of a 'key' for table traversals. First goes all
** elements in the array part, then elements in the hash part. The ** elements in the array part, then elements in the hash part. The
** beginning of a traversal is signaled by -1. ** beginning of a traversal is signaled by 0.
*/ */
static int findindex (lua_State *L, Table *t, StkId key) { static unsigned int findindex (lua_State *L, Table *t, StkId key) {
int i; unsigned int i;
if (ttisnil(key)) return -1; /* first iteration */ if (ttisnil(key)) return 0; /* first iteration */
i = arrayindex(key); i = arrayindex(key);
if (0 < i && i <= t->sizearray) /* is `key' inside array part? */ if (i != 0 && i <= t->sizearray) /* is 'key' inside array part? */
return i-1; /* yes; that's the index (corrected to C) */ return i; /* yes; that's the index */
else { else {
int nx;
Node *n = mainposition(t, key); Node *n = mainposition(t, key);
for (;;) { /* check whether `key' is somewhere in the chain */ for (;;) { /* check whether 'key' is somewhere in the chain */
/* key may be dead already, but it is ok to use it in `next' */ /* key may be dead already, but it is ok to use it in 'next' */
if (luaV_rawequalobj(gkey(n), key) || if (luaV_rawequalobj(gkey(n), key) ||
(ttisdeadkey(gkey(n)) && iscollectable(key) && (ttisdeadkey(gkey(n)) && iscollectable(key) &&
deadvalue(gkey(n)) == gcvalue(key))) { deadvalue(gkey(n)) == gcvalue(key))) {
i = cast_int(n - gnode(t, 0)); /* key index in hash table */ i = cast_int(n - gnode(t, 0)); /* key index in hash table */
/* hash elements are numbered after array ones */ /* hash elements are numbered after array ones */
return i + t->sizearray; return (i + 1) + t->sizearray;
} }
else n = gnext(n); nx = gnext(n);
if (n == NULL) if (nx == 0)
luaG_runerror(L, "invalid key to " LUA_QL("next")); /* key not found */ luaG_runerror(L, "invalid key to 'next'"); /* key not found */
else n += nx;
} }
} }
} }
int luaH_next (lua_State *L, Table *t, StkId key) { int luaH_next (lua_State *L, Table *t, StkId key) {
int i = findindex(L, t, key); /* find original element */ unsigned int i = findindex(L, t, key); /* find original element */
for (i++; i < t->sizearray; i++) { /* try first array part */ for (; i < t->sizearray; i++) { /* try first array part */
if (!ttisnil(&t->array[i])) { /* a non-nil value? */ if (!ttisnil(&t->array[i])) { /* a non-nil value? */
setnvalue(key, cast_num(i+1)); setivalue(key, i + 1);
setobj2s(L, key+1, &t->array[i]); setobj2s(L, key+1, &t->array[i]);
return 1; return 1;
} }
} }
for (i -= t->sizearray; i < sizenode(t); i++) { /* then hash part */ for (i -= t->sizearray; cast_int(i) < sizenode(t); i++) { /* hash part */
if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */ if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */
setobj2s(L, key, gkey(gnode(t, i))); setobj2s(L, key, gkey(gnode(t, i)));
setobj2s(L, key+1, gval(gnode(t, i))); setobj2s(L, key+1, gval(gnode(t, i)));
@ -192,32 +211,38 @@ int luaH_next (lua_State *L, Table *t, StkId key) {
** ============================================================== ** ==============================================================
*/ */
/*
static int computesizes (int nums[], int *narray) { ** Compute the optimal size for the array part of table 't'. 'nums' is a
** "count array" where 'nums[i]' is the number of integers in the table
** between 2^(i - 1) + 1 and 2^i. 'pna' enters with the total number of
** integer keys in the table and leaves with the number of keys that
** will go to the array part; return the optimal size.
*/
static unsigned int computesizes (unsigned int nums[], unsigned int *pna) {
int i; int i;
int twotoi; /* 2^i */ unsigned int twotoi; /* 2^i (candidate for optimal size) */
int a = 0; /* number of elements smaller than 2^i */ unsigned int a = 0; /* number of elements smaller than 2^i */
int na = 0; /* number of elements to go to array part */ unsigned int na = 0; /* number of elements to go to array part */
int n = 0; /* optimal size for array part */ unsigned int optimal = 0; /* optimal size for array part */
for (i = 0, twotoi = 1; twotoi/2 < *narray; i++, twotoi *= 2) { /* loop while keys can fill more than half of total size */
for (i = 0, twotoi = 1; *pna > twotoi / 2; i++, twotoi *= 2) {
if (nums[i] > 0) { if (nums[i] > 0) {
a += nums[i]; a += nums[i];
if (a > twotoi/2) { /* more than half elements present? */ if (a > twotoi/2) { /* more than half elements present? */
n = twotoi; /* optimal size (till now) */ optimal = twotoi; /* optimal size (till now) */
na = a; /* all elements smaller than n will go to array part */ na = a; /* all elements up to 'optimal' will go to array part */
} }
} }
if (a == *narray) break; /* all elements already counted */
} }
*narray = n; lua_assert((optimal == 0 || optimal / 2 < na) && na <= optimal);
lua_assert(*narray/2 <= na && na <= *narray); *pna = na;
return na; return optimal;
} }
static int countint (const TValue *key, int *nums) { static int countint (const TValue *key, unsigned int *nums) {
int k = arrayindex(key); unsigned int k = arrayindex(key);
if (0 < k && k <= MAXASIZE) { /* is `key' an appropriate array index? */ if (k != 0) { /* is 'key' an appropriate array index? */
nums[luaO_ceillog2(k)]++; /* count as such */ nums[luaO_ceillog2(k)]++; /* count as such */
return 1; return 1;
} }
@ -226,20 +251,26 @@ static int countint (const TValue *key, int *nums) {
} }
static int numusearray (const Table *t, int *nums) { /*
** Count keys in array part of table 't': Fill 'nums[i]' with
** number of keys that will go into corresponding slice and return
** total number of non-nil keys.
*/
static unsigned int numusearray (const Table *t, unsigned int *nums) {
int lg; int lg;
int ttlg; /* 2^lg */ unsigned int ttlg; /* 2^lg */
int ause = 0; /* summation of `nums' */ unsigned int ause = 0; /* summation of 'nums' */
int i = 1; /* count to traverse all array keys */ unsigned int i = 1; /* count to traverse all array keys */
for (lg=0, ttlg=1; lg<=MAXBITS; lg++, ttlg*=2) { /* for each slice */ /* traverse each slice */
int lc = 0; /* counter */ for (lg = 0, ttlg = 1; lg <= MAXABITS; lg++, ttlg *= 2) {
int lim = ttlg; unsigned int lc = 0; /* counter */
unsigned int lim = ttlg;
if (lim > t->sizearray) { if (lim > t->sizearray) {
lim = t->sizearray; /* adjust upper limit */ lim = t->sizearray; /* adjust upper limit */
if (i > lim) if (i > lim)
break; /* no more elements to count */ break; /* no more elements to count */
} }
/* count elements in range (2^(lg-1), 2^lg] */ /* count elements in range (2^(lg - 1), 2^lg] */
for (; i <= lim; i++) { for (; i <= lim; i++) {
if (!ttisnil(&t->array[i-1])) if (!ttisnil(&t->array[i-1]))
lc++; lc++;
@ -251,9 +282,9 @@ static int numusearray (const Table *t, int *nums) {
} }
static int numusehash (const Table *t, int *nums, int *pnasize) { static int numusehash (const Table *t, unsigned int *nums, unsigned int *pna) {
int totaluse = 0; /* total number of elements */ int totaluse = 0; /* total number of elements */
int ause = 0; /* summation of `nums' */ int ause = 0; /* elements added to 'nums' (can go to array part) */
int i = sizenode(t); int i = sizenode(t);
while (i--) { while (i--) {
Node *n = &t->node[i]; Node *n = &t->node[i];
@ -262,13 +293,13 @@ static int numusehash (const Table *t, int *nums, int *pnasize) {
totaluse++; totaluse++;
} }
} }
*pnasize += ause; *pna += ause;
return totaluse; return totaluse;
} }
static void setarrayvector (lua_State *L, Table *t, int size) { static void setarrayvector (lua_State *L, Table *t, unsigned int size) {
int i; unsigned int i;
luaM_reallocvector(L, t->array, t->sizearray, size, TValue); luaM_reallocvector(L, t->array, t->sizearray, size, TValue);
for (i=t->sizearray; i<size; i++) for (i=t->sizearray; i<size; i++)
setnilvalue(&t->array[i]); setnilvalue(&t->array[i]);
@ -276,23 +307,23 @@ static void setarrayvector (lua_State *L, Table *t, int size) {
} }
static void setnodevector (lua_State *L, Table *t, int size) { static void setnodevector (lua_State *L, Table *t, unsigned int size) {
int lsize; int lsize;
if (size == 0) { /* no elements to hash part? */ if (size == 0) { /* no elements to hash part? */
t->node = cast(Node *, dummynode); /* use common `dummynode' */ t->node = cast(Node *, dummynode); /* use common 'dummynode' */
lsize = 0; lsize = 0;
} }
else { else {
int i; int i;
lsize = luaO_ceillog2(size); lsize = luaO_ceillog2(size);
if (lsize > MAXBITS) if (lsize > MAXHBITS)
luaG_runerror(L, "table overflow"); luaG_runerror(L, "table overflow");
size = twoto(lsize); size = twoto(lsize);
t->node = luaM_newvector(L, size, Node); t->node = luaM_newvector(L, size, Node);
for (i=0; i<size; i++) { for (i = 0; i < (int)size; i++) {
Node *n = gnode(t, i); Node *n = gnode(t, i);
gnext(n) = NULL; gnext(n) = 0;
setnilvalue(gkey(n)); setnilvalue(wgkey(n));
setnilvalue(gval(n)); setnilvalue(gval(n));
} }
} }
@ -301,9 +332,11 @@ static void setnodevector (lua_State *L, Table *t, int size) {
} }
void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) { void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
int i; unsigned int nhsize) {
int oldasize = t->sizearray; unsigned int i;
int j;
unsigned int oldasize = t->sizearray;
int oldhsize = t->lsizenode; int oldhsize = t->lsizenode;
Node *nold = t->node; /* save old hash ... */ Node *nold = t->node; /* save old hash ... */
if (nasize > oldasize) /* array part must grow? */ if (nasize > oldasize) /* array part must grow? */
@ -321,8 +354,8 @@ void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) {
luaM_reallocvector(L, t->array, oldasize, nasize, TValue); luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
} }
/* re-insert elements from hash part */ /* re-insert elements from hash part */
for (i = twoto(oldhsize) - 1; i >= 0; i--) { for (j = twoto(oldhsize) - 1; j >= 0; j--) {
Node *old = nold+i; Node *old = nold + j;
if (!ttisnil(gval(old))) { if (!ttisnil(gval(old))) {
/* doesn't need barrier/invalidate cache, as entry was /* doesn't need barrier/invalidate cache, as entry was
already present in the table */ already present in the table */
@ -330,32 +363,35 @@ void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) {
} }
} }
if (!isdummy(nold)) if (!isdummy(nold))
luaM_freearray(L, nold, cast(size_t, twoto(oldhsize))); /* free old array */ luaM_freearray(L, nold, cast(size_t, twoto(oldhsize))); /* free old hash */
} }
void luaH_resizearray (lua_State *L, Table *t, int nasize) { void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize) {
int nsize = isdummy(t->node) ? 0 : sizenode(t); int nsize = isdummy(t->node) ? 0 : sizenode(t);
luaH_resize(L, t, nasize, nsize); luaH_resize(L, t, nasize, nsize);
} }
/*
** nums[i] = number of keys 'k' where 2^(i - 1) < k <= 2^i
*/
static void rehash (lua_State *L, Table *t, const TValue *ek) { static void rehash (lua_State *L, Table *t, const TValue *ek) {
int nasize, na; unsigned int asize; /* optimal size for array part */
int nums[MAXBITS+1]; /* nums[i] = number of keys with 2^(i-1) < k <= 2^i */ unsigned int na; /* number of keys in the array part */
unsigned int nums[MAXABITS + 1];
int i; int i;
int totaluse; int totaluse;
for (i=0; i<=MAXBITS; i++) nums[i] = 0; /* reset counts */ for (i = 0; i <= MAXABITS; i++) nums[i] = 0; /* reset counts */
nasize = numusearray(t, nums); /* count keys in array part */ na = numusearray(t, nums); /* count keys in array part */
totaluse = nasize; /* all those keys are integer keys */ totaluse = na; /* all those keys are integer keys */
totaluse += numusehash(t, nums, &nasize); /* count keys in hash part */ totaluse += numusehash(t, nums, &na); /* count keys in hash part */
/* count extra key */ /* count extra key */
nasize += countint(ek, nums); na += countint(ek, nums);
totaluse++; totaluse++;
/* compute new size for array part */ /* compute new size for array part */
na = computesizes(nums, &nasize); asize = computesizes(nums, &na);
/* resize the table to new computed sizes */ /* resize the table to new computed sizes */
luaH_resize(L, t, nasize, totaluse - na); luaH_resize(L, t, asize, totaluse - na);
} }
@ -366,7 +402,8 @@ static void rehash (lua_State *L, Table *t, const TValue *ek) {
Table *luaH_new (lua_State *L) { Table *luaH_new (lua_State *L) {
Table *t = &luaC_newobj(L, LUA_TTABLE, sizeof(Table), NULL, 0)->h; GCObject *o = luaC_newobj(L, LUA_TTABLE, sizeof(Table));
Table *t = gco2t(o);
t->metatable = NULL; t->metatable = NULL;
t->flags = cast_byte(~0); t->flags = cast_byte(~0);
t->array = NULL; t->array = NULL;
@ -404,37 +441,51 @@ static Node *getfreepos (Table *t) {
*/ */
TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) { TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
Node *mp; Node *mp;
TValue aux;
if (ttisnil(key)) luaG_runerror(L, "table index is nil"); if (ttisnil(key)) luaG_runerror(L, "table index is nil");
else if (ttisnumber(key) && luai_numisnan(L, nvalue(key))) else if (ttisfloat(key)) {
luaG_runerror(L, "table index is NaN"); lua_Integer k;
if (luaV_tointeger(key, &k, 0)) { /* index is int? */
setivalue(&aux, k);
key = &aux; /* insert it as an integer */
}
else if (luai_numisnan(fltvalue(key)))
luaG_runerror(L, "table index is NaN");
}
mp = mainposition(t, key); mp = mainposition(t, key);
if (!ttisnil(gval(mp)) || isdummy(mp)) { /* main position is taken? */ if (!ttisnil(gval(mp)) || isdummy(mp)) { /* main position is taken? */
Node *othern; Node *othern;
Node *n = getfreepos(t); /* get a free place */ Node *f = getfreepos(t); /* get a free place */
if (n == NULL) { /* cannot find a free place? */ if (f == NULL) { /* cannot find a free place? */
rehash(L, t, key); /* grow table */ rehash(L, t, key); /* grow table */
/* whatever called 'newkey' take care of TM cache and GC barrier */ /* whatever called 'newkey' takes care of TM cache */
return luaH_set(L, t, key); /* insert key into grown table */ return luaH_set(L, t, key); /* insert key into grown table */
} }
lua_assert(!isdummy(n)); lua_assert(!isdummy(f));
othern = mainposition(t, gkey(mp)); othern = mainposition(t, gkey(mp));
if (othern != mp) { /* is colliding node out of its main position? */ if (othern != mp) { /* is colliding node out of its main position? */
/* yes; move colliding node into free position */ /* yes; move colliding node into free position */
while (gnext(othern) != mp) othern = gnext(othern); /* find previous */ while (othern + gnext(othern) != mp) /* find previous */
gnext(othern) = n; /* redo the chain with `n' in place of `mp' */ othern += gnext(othern);
*n = *mp; /* copy colliding node into free pos. (mp->next also goes) */ gnext(othern) = cast_int(f - othern); /* rechain to point to 'f' */
gnext(mp) = NULL; /* now `mp' is free */ *f = *mp; /* copy colliding node into free pos. (mp->next also goes) */
if (gnext(mp) != 0) {
gnext(f) += cast_int(mp - f); /* correct 'next' */
gnext(mp) = 0; /* now 'mp' is free */
}
setnilvalue(gval(mp)); setnilvalue(gval(mp));
} }
else { /* colliding node is in its own main position */ else { /* colliding node is in its own main position */
/* new node will go into free position */ /* new node will go into free position */
gnext(n) = gnext(mp); /* chain new position */ if (gnext(mp) != 0)
gnext(mp) = n; gnext(f) = cast_int((mp + gnext(mp)) - f); /* chain new position */
mp = n; else lua_assert(gnext(f) == 0);
gnext(mp) = cast_int(f - mp);
mp = f;
} }
} }
setobj2t(L, gkey(mp), key); setnodekey(L, &mp->i_key, key);
luaC_barrierback(L, obj2gco(t), key); luaC_barrierback(L, t, key);
lua_assert(ttisnil(gval(mp))); lua_assert(ttisnil(gval(mp)));
return gval(mp); return gval(mp);
} }
@ -443,18 +494,21 @@ TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
/* /*
** search function for integers ** search function for integers
*/ */
const TValue *luaH_getint (Table *t, int key) { const TValue *luaH_getint (Table *t, lua_Integer key) {
/* (1 <= key && key <= t->sizearray) */ /* (1 <= key && key <= t->sizearray) */
if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray)) if (l_castS2U(key) - 1 < t->sizearray)
return &t->array[key-1]; return &t->array[key - 1];
else { else {
lua_Number nk = cast_num(key); Node *n = hashint(t, key);
Node *n = hashnum(t, nk); for (;;) { /* check whether 'key' is somewhere in the chain */
do { /* check whether `key' is somewhere in the chain */ if (ttisinteger(gkey(n)) && ivalue(gkey(n)) == key)
if (ttisnumber(gkey(n)) && luai_numeq(nvalue(gkey(n)), nk))
return gval(n); /* that's it */ return gval(n); /* that's it */
else n = gnext(n); else {
} while (n); int nx = gnext(n);
if (nx == 0) break;
n += nx;
}
}
return luaO_nilobject; return luaO_nilobject;
} }
} }
@ -463,15 +517,50 @@ const TValue *luaH_getint (Table *t, int key) {
/* /*
** search function for short strings ** search function for short strings
*/ */
const TValue *luaH_getstr (Table *t, TString *key) { const TValue *luaH_getshortstr (Table *t, TString *key) {
Node *n = hashstr(t, key); Node *n = hashstr(t, key);
lua_assert(key->tsv.tt == LUA_TSHRSTR); lua_assert(key->tt == LUA_TSHRSTR);
do { /* check whether `key' is somewhere in the chain */ for (;;) { /* check whether 'key' is somewhere in the chain */
if (ttisshrstring(gkey(n)) && eqshrstr(rawtsvalue(gkey(n)), key)) const TValue *k = gkey(n);
if (ttisshrstring(k) && eqshrstr(tsvalue(k), key))
return gval(n); /* that's it */
else {
int nx = gnext(n);
if (nx == 0)
return luaO_nilobject; /* not found */
n += nx;
}
}
}
/*
** "Generic" get version. (Not that generic: not valid for integers,
** which may be in array part, nor for floats with integral values.)
*/
static const TValue *getgeneric (Table *t, const TValue *key) {
Node *n = mainposition(t, key);
for (;;) { /* check whether 'key' is somewhere in the chain */
if (luaV_rawequalobj(gkey(n), key))
return gval(n); /* that's it */ return gval(n); /* that's it */
else n = gnext(n); else {
} while (n); int nx = gnext(n);
return luaO_nilobject; if (nx == 0)
return luaO_nilobject; /* not found */
n += nx;
}
}
}
const TValue *luaH_getstr (Table *t, TString *key) {
if (key->tt == LUA_TSHRSTR)
return luaH_getshortstr(t, key);
else { /* for long strings, use generic case */
TValue ko;
setsvalue(cast(lua_State *, NULL), &ko, key);
return getgeneric(t, &ko);
}
} }
@ -480,25 +569,17 @@ const TValue *luaH_getstr (Table *t, TString *key) {
*/ */
const TValue *luaH_get (Table *t, const TValue *key) { const TValue *luaH_get (Table *t, const TValue *key) {
switch (ttype(key)) { switch (ttype(key)) {
case LUA_TSHRSTR: return luaH_getstr(t, rawtsvalue(key)); case LUA_TSHRSTR: return luaH_getshortstr(t, tsvalue(key));
case LUA_TNUMINT: return luaH_getint(t, ivalue(key));
case LUA_TNIL: return luaO_nilobject; case LUA_TNIL: return luaO_nilobject;
case LUA_TNUMBER: { case LUA_TNUMFLT: {
int k; lua_Integer k;
lua_Number n = nvalue(key); if (luaV_tointeger(key, &k, 0)) /* index is int? */
lua_number2int(k, n);
if (luai_numeq(cast_num(k), n)) /* index is int? */
return luaH_getint(t, k); /* use specialized version */ return luaH_getint(t, k); /* use specialized version */
/* else go through */ /* else... */
} } /* FALLTHROUGH */
default: { default:
Node *n = mainposition(t, key); return getgeneric(t, key);
do { /* check whether `key' is somewhere in the chain */
if (luaV_rawequalobj(gkey(n), key))
return gval(n); /* that's it */
else n = gnext(n);
} while (n);
return luaO_nilobject;
}
} }
} }
@ -515,14 +596,14 @@ TValue *luaH_set (lua_State *L, Table *t, const TValue *key) {
} }
void luaH_setint (lua_State *L, Table *t, int key, TValue *value) { void luaH_setint (lua_State *L, Table *t, lua_Integer key, TValue *value) {
const TValue *p = luaH_getint(t, key); const TValue *p = luaH_getint(t, key);
TValue *cell; TValue *cell;
if (p != luaO_nilobject) if (p != luaO_nilobject)
cell = cast(TValue *, p); cell = cast(TValue *, p);
else { else {
TValue k; TValue k;
setnvalue(&k, cast_num(key)); setivalue(&k, key);
cell = luaH_newkey(L, t, &k); cell = luaH_newkey(L, t, &k);
} }
setobj2t(L, cell, value); setobj2t(L, cell, value);
@ -532,16 +613,16 @@ void luaH_setint (lua_State *L, Table *t, int key, TValue *value) {
static int unbound_search (Table *t, unsigned int j) { static int unbound_search (Table *t, unsigned int j) {
unsigned int i = j; /* i is zero or a present index */ unsigned int i = j; /* i is zero or a present index */
j++; j++;
/* find `i' and `j' such that i is present and j is not */ /* find 'i' and 'j' such that i is present and j is not */
while (!ttisnil(luaH_getint(t, j))) { while (!ttisnil(luaH_getint(t, j))) {
i = j; i = j;
j *= 2; if (j > cast(unsigned int, MAX_INT)/2) { /* overflow? */
if (j > cast(unsigned int, MAX_INT)) { /* overflow? */
/* table was built with bad purposes: resort to linear search */ /* table was built with bad purposes: resort to linear search */
i = 1; i = 1;
while (!ttisnil(luaH_getint(t, i))) i++; while (!ttisnil(luaH_getint(t, i))) i++;
return i - 1; return i - 1;
} }
j *= 2;
} }
/* now do a binary search between them */ /* now do a binary search between them */
while (j - i > 1) { while (j - i > 1) {
@ -554,7 +635,7 @@ static int unbound_search (Table *t, unsigned int j) {
/* /*
** Try to find a boundary in table `t'. A `boundary' is an integer index ** Try to find a boundary in table 't'. A 'boundary' is an integer index
** such that t[i] is non-nil and t[i+1] is nil (and 0 if t[1] is nil). ** such that t[i] is non-nil and t[i+1] is nil (and 0 if t[1] is nil).
*/ */
int luaH_getn (Table *t) { int luaH_getn (Table *t) {

@ -1,23 +1,61 @@
/* /*
** $Id: ltablib.c,v 1.65.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: ltablib.c,v 1.93 2016/02/25 19:41:54 roberto Exp $
** Library for Table Manipulation ** Library for Table Manipulation
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <stddef.h>
#define ltablib_c #define ltablib_c
#define LUA_LIB #define LUA_LIB
#include "lprefix.h"
#include <limits.h>
#include <stddef.h>
#include <string.h>
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
#include "lualib.h" #include "lualib.h"
#define aux_getn(L,n) (luaL_checktype(L, n, LUA_TTABLE), luaL_len(L, n)) /*
** Operations that an object must define to mimic a table
** (some functions only need some of them)
*/
#define TAB_R 1 /* read */
#define TAB_W 2 /* write */
#define TAB_L 4 /* length */
#define TAB_RW (TAB_R | TAB_W) /* read/write */
#define aux_getn(L,n,w) (checktab(L, n, (w) | TAB_L), luaL_len(L, n))
static int checkfield (lua_State *L, const char *key, int n) {
lua_pushstring(L, key);
return (lua_rawget(L, -n) != LUA_TNIL);
}
/*
** Check that 'arg' either is a table or can behave like one (that is,
** has a metatable with the required metamethods)
*/
static void checktab (lua_State *L, int arg, int what) {
if (lua_type(L, arg) != LUA_TTABLE) { /* is it not a table? */
int n = 1; /* number of elements to pop */
if (lua_getmetatable(L, arg) && /* must have metatable */
(!(what & TAB_R) || checkfield(L, "__index", ++n)) &&
(!(what & TAB_W) || checkfield(L, "__newindex", ++n)) &&
(!(what & TAB_L) || checkfield(L, "__len", ++n))) {
lua_pop(L, n); /* pop metatable and tested metamethods */
}
else
luaL_checktype(L, arg, LUA_TTABLE); /* force an error */
}
}
#if defined(LUA_COMPAT_MAXN) #if defined(LUA_COMPAT_MAXN)
@ -39,65 +77,102 @@ static int maxn (lua_State *L) {
static int tinsert (lua_State *L) { static int tinsert (lua_State *L) {
int e = aux_getn(L, 1) + 1; /* first empty element */ lua_Integer e = aux_getn(L, 1, TAB_RW) + 1; /* first empty element */
int pos; /* where to insert new element */ lua_Integer pos; /* where to insert new element */
switch (lua_gettop(L)) { switch (lua_gettop(L)) {
case 2: { /* called with only 2 arguments */ case 2: { /* called with only 2 arguments */
pos = e; /* insert new element at the end */ pos = e; /* insert new element at the end */
break; break;
} }
case 3: { case 3: {
int i; lua_Integer i;
pos = luaL_checkint(L, 2); /* 2nd argument is the position */ pos = luaL_checkinteger(L, 2); /* 2nd argument is the position */
luaL_argcheck(L, 1 <= pos && pos <= e, 2, "position out of bounds"); luaL_argcheck(L, 1 <= pos && pos <= e, 2, "position out of bounds");
for (i = e; i > pos; i--) { /* move up elements */ for (i = e; i > pos; i--) { /* move up elements */
lua_rawgeti(L, 1, i-1); lua_geti(L, 1, i - 1);
lua_rawseti(L, 1, i); /* t[i] = t[i-1] */ lua_seti(L, 1, i); /* t[i] = t[i - 1] */
} }
break; break;
} }
default: { default: {
return luaL_error(L, "wrong number of arguments to " LUA_QL("insert")); return luaL_error(L, "wrong number of arguments to 'insert'");
} }
} }
lua_rawseti(L, 1, pos); /* t[pos] = v */ lua_seti(L, 1, pos); /* t[pos] = v */
return 0; return 0;
} }
static int tremove (lua_State *L) { static int tremove (lua_State *L) {
int size = aux_getn(L, 1); lua_Integer size = aux_getn(L, 1, TAB_RW);
int pos = luaL_optint(L, 2, size); lua_Integer pos = luaL_optinteger(L, 2, size);
if (pos != size) /* validate 'pos' if given */ if (pos != size) /* validate 'pos' if given */
luaL_argcheck(L, 1 <= pos && pos <= size + 1, 1, "position out of bounds"); luaL_argcheck(L, 1 <= pos && pos <= size + 1, 1, "position out of bounds");
lua_rawgeti(L, 1, pos); /* result = t[pos] */ lua_geti(L, 1, pos); /* result = t[pos] */
for ( ; pos < size; pos++) { for ( ; pos < size; pos++) {
lua_rawgeti(L, 1, pos+1); lua_geti(L, 1, pos + 1);
lua_rawseti(L, 1, pos); /* t[pos] = t[pos+1] */ lua_seti(L, 1, pos); /* t[pos] = t[pos + 1] */
} }
lua_pushnil(L); lua_pushnil(L);
lua_rawseti(L, 1, pos); /* t[pos] = nil */ lua_seti(L, 1, pos); /* t[pos] = nil */
return 1; return 1;
} }
static void addfield (lua_State *L, luaL_Buffer *b, int i) { /*
lua_rawgeti(L, 1, i); ** Copy elements (1[f], ..., 1[e]) into (tt[t], tt[t+1], ...). Whenever
** possible, copy in increasing order, which is better for rehashing.
** "possible" means destination after original range, or smaller
** than origin, or copying to another table.
*/
static int tmove (lua_State *L) {
lua_Integer f = luaL_checkinteger(L, 2);
lua_Integer e = luaL_checkinteger(L, 3);
lua_Integer t = luaL_checkinteger(L, 4);
int tt = !lua_isnoneornil(L, 5) ? 5 : 1; /* destination table */
checktab(L, 1, TAB_R);
checktab(L, tt, TAB_W);
if (e >= f) { /* otherwise, nothing to move */
lua_Integer n, i;
luaL_argcheck(L, f > 0 || e < LUA_MAXINTEGER + f, 3,
"too many elements to move");
n = e - f + 1; /* number of elements to move */
luaL_argcheck(L, t <= LUA_MAXINTEGER - n + 1, 4,
"destination wrap around");
if (t > e || t <= f || (tt != 1 && !lua_compare(L, 1, tt, LUA_OPEQ))) {
for (i = 0; i < n; i++) {
lua_geti(L, 1, f + i);
lua_seti(L, tt, t + i);
}
}
else {
for (i = n - 1; i >= 0; i--) {
lua_geti(L, 1, f + i);
lua_seti(L, tt, t + i);
}
}
}
lua_pushvalue(L, tt); /* return destination table */
return 1;
}
static void addfield (lua_State *L, luaL_Buffer *b, lua_Integer i) {
lua_geti(L, 1, i);
if (!lua_isstring(L, -1)) if (!lua_isstring(L, -1))
luaL_error(L, "invalid value (%s) at index %d in table for " luaL_error(L, "invalid value (%s) at index %d in table for 'concat'",
LUA_QL("concat"), luaL_typename(L, -1), i); luaL_typename(L, -1), i);
luaL_addvalue(b); luaL_addvalue(b);
} }
static int tconcat (lua_State *L) { static int tconcat (lua_State *L) {
luaL_Buffer b; luaL_Buffer b;
lua_Integer last = aux_getn(L, 1, TAB_R);
size_t lsep; size_t lsep;
int i, last;
const char *sep = luaL_optlstring(L, 2, "", &lsep); const char *sep = luaL_optlstring(L, 2, "", &lsep);
luaL_checktype(L, 1, LUA_TTABLE); lua_Integer i = luaL_optinteger(L, 3, 1);
i = luaL_optint(L, 3, 1); last = luaL_optinteger(L, 4, last);
last = luaL_opt(L, luaL_checkint, 4, luaL_len(L, 1));
luaL_buffinit(L, &b); luaL_buffinit(L, &b);
for (; i < last; i++) { for (; i < last; i++) {
addfield(L, &b, i); addfield(L, &b, i);
@ -117,35 +192,31 @@ static int tconcat (lua_State *L) {
*/ */
static int pack (lua_State *L) { static int pack (lua_State *L) {
int i;
int n = lua_gettop(L); /* number of elements to pack */ int n = lua_gettop(L); /* number of elements to pack */
lua_createtable(L, n, 1); /* create result table */ lua_createtable(L, n, 1); /* create result table */
lua_insert(L, 1); /* put it at index 1 */
for (i = n; i >= 1; i--) /* assign elements */
lua_seti(L, 1, i);
lua_pushinteger(L, n); lua_pushinteger(L, n);
lua_setfield(L, -2, "n"); /* t.n = number of elements */ lua_setfield(L, 1, "n"); /* t.n = number of elements */
if (n > 0) { /* at least one element? */
int i;
lua_pushvalue(L, 1);
lua_rawseti(L, -2, 1); /* insert first element */
lua_replace(L, 1); /* move table into index 1 */
for (i = n; i >= 2; i--) /* assign other elements */
lua_rawseti(L, 1, i);
}
return 1; /* return table */ return 1; /* return table */
} }
static int unpack (lua_State *L) { static int unpack (lua_State *L) {
int i, e, n; lua_Unsigned n;
luaL_checktype(L, 1, LUA_TTABLE); lua_Integer i = luaL_optinteger(L, 2, 1);
i = luaL_optint(L, 2, 1); lua_Integer e = luaL_opt(L, luaL_checkinteger, 3, luaL_len(L, 1));
e = luaL_opt(L, luaL_checkint, 3, luaL_len(L, 1));
if (i > e) return 0; /* empty range */ if (i > e) return 0; /* empty range */
n = e - i + 1; /* number of elements */ n = (lua_Unsigned)e - i; /* number of elements minus 1 (avoid overflows) */
if (n <= 0 || !lua_checkstack(L, n)) /* n <= 0 means arith. overflow */ if (n >= (unsigned int)INT_MAX || !lua_checkstack(L, (int)(++n)))
return luaL_error(L, "too many results to unpack"); return luaL_error(L, "too many results to unpack");
lua_rawgeti(L, 1, i); /* push arg[i] (avoiding overflow problems) */ for (; i < e; i++) { /* push arg[i..e - 1] (to avoid overflows) */
while (i++ < e) /* push arg[i + 1...e] */ lua_geti(L, 1, i);
lua_rawgeti(L, 1, i); }
return n; lua_geti(L, 1, e); /* push last element */
return (int)n;
} }
/* }====================================================== */ /* }====================================================== */
@ -155,102 +226,197 @@ static int unpack (lua_State *L) {
/* /*
** {====================================================== ** {======================================================
** Quicksort ** Quicksort
** (based on `Algorithms in MODULA-3', Robert Sedgewick; ** (based on 'Algorithms in MODULA-3', Robert Sedgewick;
** Addison-Wesley, 1993.) ** Addison-Wesley, 1993.)
** ======================================================= ** =======================================================
*/ */
static void set2 (lua_State *L, int i, int j) { /* type for array indices */
lua_rawseti(L, 1, i); typedef unsigned int IdxT;
lua_rawseti(L, 1, j);
/*
** Produce a "random" 'unsigned int' to randomize pivot choice. This
** macro is used only when 'sort' detects a big imbalance in the result
** of a partition. (If you don't want/need this "randomness", ~0 is a
** good choice.)
*/
#if !defined(l_randomizePivot) /* { */
#include <time.h>
/* size of 'e' measured in number of 'unsigned int's */
#define sof(e) (sizeof(e) / sizeof(unsigned int))
/*
** Use 'time' and 'clock' as sources of "randomness". Because we don't
** know the types 'clock_t' and 'time_t', we cannot cast them to
** anything without risking overflows. A safe way to use their values
** is to copy them to an array of a known type and use the array values.
*/
static unsigned int l_randomizePivot (void) {
clock_t c = clock();
time_t t = time(NULL);
unsigned int buff[sof(c) + sof(t)];
unsigned int i, rnd = 0;
memcpy(buff, &c, sof(c) * sizeof(unsigned int));
memcpy(buff + sof(c), &t, sof(t) * sizeof(unsigned int));
for (i = 0; i < sof(buff); i++)
rnd += buff[i];
return rnd;
}
#endif /* } */
/* arrays larger than 'RANLIMIT' may use randomized pivots */
#define RANLIMIT 100u
static void set2 (lua_State *L, IdxT i, IdxT j) {
lua_seti(L, 1, i);
lua_seti(L, 1, j);
} }
/*
** Return true iff value at stack index 'a' is less than the value at
** index 'b' (according to the order of the sort).
*/
static int sort_comp (lua_State *L, int a, int b) { static int sort_comp (lua_State *L, int a, int b) {
if (!lua_isnil(L, 2)) { /* function? */ if (lua_isnil(L, 2)) /* no function? */
return lua_compare(L, a, b, LUA_OPLT); /* a < b */
else { /* function */
int res; int res;
lua_pushvalue(L, 2); lua_pushvalue(L, 2); /* push function */
lua_pushvalue(L, a-1); /* -1 to compensate function */ lua_pushvalue(L, a-1); /* -1 to compensate function */
lua_pushvalue(L, b-2); /* -2 to compensate function and `a' */ lua_pushvalue(L, b-2); /* -2 to compensate function and 'a' */
lua_call(L, 2, 1); lua_call(L, 2, 1); /* call function */
res = lua_toboolean(L, -1); res = lua_toboolean(L, -1); /* get result */
lua_pop(L, 1); lua_pop(L, 1); /* pop result */
return res; return res;
} }
else /* a < b? */
return lua_compare(L, a, b, LUA_OPLT);
} }
static void auxsort (lua_State *L, int l, int u) {
while (l < u) { /* for tail recursion */ /*
int i, j; ** Does the partition: Pivot P is at the top of the stack.
/* sort elements a[l], a[(l+u)/2] and a[u] */ ** precondition: a[lo] <= P == a[up-1] <= a[up],
lua_rawgeti(L, 1, l); ** so it only needs to do the partition from lo + 1 to up - 2.
lua_rawgeti(L, 1, u); ** Pos-condition: a[lo .. i - 1] <= a[i] == P <= a[i + 1 .. up]
if (sort_comp(L, -1, -2)) /* a[u] < a[l]? */ ** returns 'i'.
set2(L, l, u); /* swap a[l] - a[u] */ */
static IdxT partition (lua_State *L, IdxT lo, IdxT up) {
IdxT i = lo; /* will be incremented before first use */
IdxT j = up - 1; /* will be decremented before first use */
/* loop invariant: a[lo .. i] <= P <= a[j .. up] */
for (;;) {
/* next loop: repeat ++i while a[i] < P */
while (lua_geti(L, 1, ++i), sort_comp(L, -1, -2)) {
if (i == up - 1) /* a[i] < P but a[up - 1] == P ?? */
luaL_error(L, "invalid order function for sorting");
lua_pop(L, 1); /* remove a[i] */
}
/* after the loop, a[i] >= P and a[lo .. i - 1] < P */
/* next loop: repeat --j while P < a[j] */
while (lua_geti(L, 1, --j), sort_comp(L, -3, -1)) {
if (j < i) /* j < i but a[j] > P ?? */
luaL_error(L, "invalid order function for sorting");
lua_pop(L, 1); /* remove a[j] */
}
/* after the loop, a[j] <= P and a[j + 1 .. up] >= P */
if (j < i) { /* no elements out of place? */
/* a[lo .. i - 1] <= P <= a[j + 1 .. i .. up] */
lua_pop(L, 1); /* pop a[j] */
/* swap pivot (a[up - 1]) with a[i] to satisfy pos-condition */
set2(L, up - 1, i);
return i;
}
/* otherwise, swap a[i] - a[j] to restore invariant and repeat */
set2(L, i, j);
}
}
/*
** Choose an element in the middle (2nd-3th quarters) of [lo,up]
** "randomized" by 'rnd'
*/
static IdxT choosePivot (IdxT lo, IdxT up, unsigned int rnd) {
IdxT r4 = (up - lo) / 4; /* range/4 */
IdxT p = rnd % (r4 * 2) + (lo + r4);
lua_assert(lo + r4 <= p && p <= up - r4);
return p;
}
/*
** QuickSort algorithm (recursive function)
*/
static void auxsort (lua_State *L, IdxT lo, IdxT up,
unsigned int rnd) {
while (lo < up) { /* loop for tail recursion */
IdxT p; /* Pivot index */
IdxT n; /* to be used later */
/* sort elements 'lo', 'p', and 'up' */
lua_geti(L, 1, lo);
lua_geti(L, 1, up);
if (sort_comp(L, -1, -2)) /* a[up] < a[lo]? */
set2(L, lo, up); /* swap a[lo] - a[up] */
else else
lua_pop(L, 2); lua_pop(L, 2); /* remove both values */
if (u-l == 1) break; /* only 2 elements */ if (up - lo == 1) /* only 2 elements? */
i = (l+u)/2; return; /* already sorted */
lua_rawgeti(L, 1, i); if (up - lo < RANLIMIT || rnd == 0) /* small interval or no randomize? */
lua_rawgeti(L, 1, l); p = (lo + up)/2; /* middle element is a good pivot */
if (sort_comp(L, -2, -1)) /* a[i]<a[l]? */ else /* for larger intervals, it is worth a random pivot */
set2(L, i, l); p = choosePivot(lo, up, rnd);
lua_geti(L, 1, p);
lua_geti(L, 1, lo);
if (sort_comp(L, -2, -1)) /* a[p] < a[lo]? */
set2(L, p, lo); /* swap a[p] - a[lo] */
else { else {
lua_pop(L, 1); /* remove a[l] */ lua_pop(L, 1); /* remove a[lo] */
lua_rawgeti(L, 1, u); lua_geti(L, 1, up);
if (sort_comp(L, -1, -2)) /* a[u]<a[i]? */ if (sort_comp(L, -1, -2)) /* a[up] < a[p]? */
set2(L, i, u); set2(L, p, up); /* swap a[up] - a[p] */
else else
lua_pop(L, 2); lua_pop(L, 2);
} }
if (u-l == 2) break; /* only 3 elements */ if (up - lo == 2) /* only 3 elements? */
lua_rawgeti(L, 1, i); /* Pivot */ return; /* already sorted */
lua_pushvalue(L, -1); lua_geti(L, 1, p); /* get middle element (Pivot) */
lua_rawgeti(L, 1, u-1); lua_pushvalue(L, -1); /* push Pivot */
set2(L, i, u-1); lua_geti(L, 1, up - 1); /* push a[up - 1] */
/* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */ set2(L, p, up - 1); /* swap Pivot (a[p]) with a[up - 1] */
i = l; j = u-1; p = partition(L, lo, up);
for (;;) { /* invariant: a[l..i] <= P <= a[j..u] */ /* a[lo .. p - 1] <= a[p] == P <= a[p + 1 .. up] */
/* repeat ++i until a[i] >= P */ if (p - lo < up - p) { /* lower interval is smaller? */
while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) { auxsort(L, lo, p - 1, rnd); /* call recursively for lower interval */
if (i>=u) luaL_error(L, "invalid order function for sorting"); n = p - lo; /* size of smaller interval */
lua_pop(L, 1); /* remove a[i] */ lo = p + 1; /* tail call for [p + 1 .. up] (upper interval) */
}
/* repeat --j until a[j] <= P */
while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
if (j<=l) luaL_error(L, "invalid order function for sorting");
lua_pop(L, 1); /* remove a[j] */
}
if (j<i) {
lua_pop(L, 3); /* pop pivot, a[i], a[j] */
break;
}
set2(L, i, j);
}
lua_rawgeti(L, 1, u-1);
lua_rawgeti(L, 1, i);
set2(L, u-1, i); /* swap pivot (a[u-1]) with a[i] */
/* a[l..i-1] <= a[i] == P <= a[i+1..u] */
/* adjust so that smaller half is in [j..i] and larger one in [l..u] */
if (i-l < u-i) {
j=l; i=i-1; l=i+2;
} }
else { else {
j=i+1; i=u; u=j-2; auxsort(L, p + 1, up, rnd); /* call recursively for upper interval */
n = up - p; /* size of smaller interval */
up = p - 1; /* tail call for [lo .. p - 1] (lower interval) */
} }
auxsort(L, j, i); /* call recursively the smaller one */ if ((up - lo) / 128 > n) /* partition too imbalanced? */
} /* repeat the routine for the larger one */ rnd = l_randomizePivot(); /* try a new randomization */
} /* tail call auxsort(L, lo, up, rnd) */
} }
static int sort (lua_State *L) { static int sort (lua_State *L) {
int n = aux_getn(L, 1); lua_Integer n = aux_getn(L, 1, TAB_RW);
luaL_checkstack(L, 40, ""); /* assume array is smaller than 2^40 */ if (n > 1) { /* non-trivial interval? */
if (!lua_isnoneornil(L, 2)) /* is there a 2nd argument? */ luaL_argcheck(L, n < INT_MAX, 1, "array too big");
luaL_checktype(L, 2, LUA_TFUNCTION); if (!lua_isnoneornil(L, 2)) /* is there a 2nd argument? */
lua_settop(L, 2); /* make sure there is two arguments */ luaL_checktype(L, 2, LUA_TFUNCTION); /* must be a function */
auxsort(L, 1, n); lua_settop(L, 2); /* make sure there are two arguments */
auxsort(L, 1, (IdxT)n, 0);
}
return 0; return 0;
} }
@ -266,6 +432,7 @@ static const luaL_Reg tab_funcs[] = {
{"pack", pack}, {"pack", pack},
{"unpack", unpack}, {"unpack", unpack},
{"remove", tremove}, {"remove", tremove},
{"move", tmove},
{"sort", sort}, {"sort", sort},
{NULL, NULL} {NULL, NULL}
}; };

@ -1,22 +1,27 @@
/* /*
** $Id: ltm.c,v 2.14.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: ltm.c,v 2.37 2016/02/26 19:20:15 roberto Exp $
** Tag methods ** Tag methods
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <string.h>
#define ltm_c #define ltm_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include <string.h>
#include "lua.h" #include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lobject.h" #include "lobject.h"
#include "lstate.h" #include "lstate.h"
#include "lstring.h" #include "lstring.h"
#include "ltable.h" #include "ltable.h"
#include "ltm.h" #include "ltm.h"
#include "lvm.h"
static const char udatatypename[] = "userdata"; static const char udatatypename[] = "userdata";
@ -25,7 +30,7 @@ LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTAGS] = {
"no value", "no value",
"nil", "boolean", udatatypename, "number", "nil", "boolean", udatatypename, "number",
"string", "table", "function", udatatypename, "thread", "string", "table", "function", udatatypename, "thread",
"proto", "upval" /* these last two cases are used for tests only */ "proto" /* this last case is used for tests only */
}; };
@ -33,14 +38,16 @@ void luaT_init (lua_State *L) {
static const char *const luaT_eventname[] = { /* ORDER TM */ static const char *const luaT_eventname[] = { /* ORDER TM */
"__index", "__newindex", "__index", "__newindex",
"__gc", "__mode", "__len", "__eq", "__gc", "__mode", "__len", "__eq",
"__add", "__sub", "__mul", "__div", "__mod", "__add", "__sub", "__mul", "__mod", "__pow",
"__pow", "__unm", "__lt", "__le", "__div", "__idiv",
"__band", "__bor", "__bxor", "__shl", "__shr",
"__unm", "__bnot", "__lt", "__le",
"__concat", "__call" "__concat", "__call"
}; };
int i; int i;
for (i=0; i<TM_N; i++) { for (i=0; i<TM_N; i++) {
G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]); G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]);
luaS_fix(G(L)->tmname[i]); /* never collect these names */ luaC_fix(L, obj2gco(G(L)->tmname[i])); /* never collect these names */
} }
} }
@ -50,7 +57,7 @@ void luaT_init (lua_State *L) {
** tag methods ** tag methods
*/ */
const TValue *luaT_gettm (Table *events, TMS event, TString *ename) { const TValue *luaT_gettm (Table *events, TMS event, TString *ename) {
const TValue *tm = luaH_getstr(events, ename); const TValue *tm = luaH_getshortstr(events, ename);
lua_assert(event <= TM_EQ); lua_assert(event <= TM_EQ);
if (ttisnil(tm)) { /* no tag method? */ if (ttisnil(tm)) { /* no tag method? */
events->flags |= cast_byte(1u<<event); /* cache this fact */ events->flags |= cast_byte(1u<<event); /* cache this fact */
@ -62,7 +69,7 @@ const TValue *luaT_gettm (Table *events, TMS event, TString *ename) {
const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) { const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
Table *mt; Table *mt;
switch (ttypenv(o)) { switch (ttnov(o)) {
case LUA_TTABLE: case LUA_TTABLE:
mt = hvalue(o)->metatable; mt = hvalue(o)->metatable;
break; break;
@ -70,8 +77,89 @@ const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
mt = uvalue(o)->metatable; mt = uvalue(o)->metatable;
break; break;
default: default:
mt = G(L)->mt[ttypenv(o)]; mt = G(L)->mt[ttnov(o)];
}
return (mt ? luaH_getshortstr(mt, G(L)->tmname[event]) : luaO_nilobject);
}
/*
** Return the name of the type of an object. For tables and userdata
** with metatable, use their '__name' metafield, if present.
*/
const char *luaT_objtypename (lua_State *L, const TValue *o) {
Table *mt;
if ((ttistable(o) && (mt = hvalue(o)->metatable) != NULL) ||
(ttisfulluserdata(o) && (mt = uvalue(o)->metatable) != NULL)) {
const TValue *name = luaH_getshortstr(mt, luaS_new(L, "__name"));
if (ttisstring(name)) /* is '__name' a string? */
return getstr(tsvalue(name)); /* use it as type name */
} }
return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject); return ttypename(ttnov(o)); /* else use standard type name */
}
void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
const TValue *p2, TValue *p3, int hasres) {
ptrdiff_t result = savestack(L, p3);
StkId func = L->top;
setobj2s(L, func, f); /* push function (assume EXTRA_STACK) */
setobj2s(L, func + 1, p1); /* 1st argument */
setobj2s(L, func + 2, p2); /* 2nd argument */
L->top += 3;
if (!hasres) /* no result? 'p3' is third argument */
setobj2s(L, L->top++, p3); /* 3rd argument */
/* metamethod may yield only when called from Lua code */
if (isLua(L->ci))
luaD_call(L, func, hasres);
else
luaD_callnoyield(L, func, hasres);
if (hasres) { /* if has result, move it to its place */
p3 = restorestack(L, result);
setobjs2s(L, p3, --L->top);
}
}
int luaT_callbinTM (lua_State *L, const TValue *p1, const TValue *p2,
StkId res, TMS event) {
const TValue *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */
if (ttisnil(tm))
tm = luaT_gettmbyobj(L, p2, event); /* try second operand */
if (ttisnil(tm)) return 0;
luaT_callTM(L, tm, p1, p2, res, 1);
return 1;
}
void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
StkId res, TMS event) {
if (!luaT_callbinTM(L, p1, p2, res, event)) {
switch (event) {
case TM_CONCAT:
luaG_concaterror(L, p1, p2);
/* call never returns, but to avoid warnings: *//* FALLTHROUGH */
case TM_BAND: case TM_BOR: case TM_BXOR:
case TM_SHL: case TM_SHR: case TM_BNOT: {
lua_Number dummy;
if (tonumber(p1, &dummy) && tonumber(p2, &dummy))
luaG_tointerror(L, p1, p2);
else
luaG_opinterror(L, p1, p2, "perform bitwise operation on");
}
/* calls never return, but to avoid warnings: *//* FALLTHROUGH */
default:
luaG_opinterror(L, p1, p2, "perform arithmetic on");
}
}
}
int luaT_callorderTM (lua_State *L, const TValue *p1, const TValue *p2,
TMS event) {
if (!luaT_callbinTM(L, p1, p2, L->top, event))
return -1; /* no metamethod */
else
return !l_isfalse(L->top);
} }

@ -1,17 +1,19 @@
/* /*
** $Id: lua.c,v 1.206.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lua.c,v 1.226 2015/08/14 19:11:20 roberto Exp $
** Lua stand-alone interpreter ** Lua stand-alone interpreter
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define lua_c
#include "lprefix.h"
#include <signal.h> #include <signal.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define lua_c
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
@ -31,28 +33,38 @@
#define LUA_MAXINPUT 512 #define LUA_MAXINPUT 512
#endif #endif
#if !defined(LUA_INIT) #if !defined(LUA_INIT_VAR)
#define LUA_INIT "LUA_INIT" #define LUA_INIT_VAR "LUA_INIT"
#endif #endif
#define LUA_INITVERSION \ #define LUA_INITVARVERSION \
LUA_INIT "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR LUA_INIT_VAR "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
/* /*
** lua_stdin_is_tty detects whether the standard input is a 'tty' (that ** lua_stdin_is_tty detects whether the standard input is a 'tty' (that
** is, whether we're running lua interactively). ** is, whether we're running lua interactively).
*/ */
#if defined(LUA_USE_ISATTY) #if !defined(lua_stdin_is_tty) /* { */
#if defined(LUA_USE_POSIX) /* { */
#include <unistd.h> #include <unistd.h>
#define lua_stdin_is_tty() isatty(0) #define lua_stdin_is_tty() isatty(0)
#elif defined(LUA_WIN)
#elif defined(LUA_USE_WINDOWS) /* }{ */
#include <io.h> #include <io.h>
#include <stdio.h>
#define lua_stdin_is_tty() _isatty(_fileno(stdin)) #define lua_stdin_is_tty() _isatty(_fileno(stdin))
#else
#else /* }{ */
/* ISO C definition */
#define lua_stdin_is_tty() 1 /* assume stdin is a tty */ #define lua_stdin_is_tty() 1 /* assume stdin is a tty */
#endif
#endif /* } */
#endif /* } */
/* /*
@ -61,26 +73,27 @@
** lua_saveline defines how to "save" a read line in a "history". ** lua_saveline defines how to "save" a read line in a "history".
** lua_freeline defines how to free a line read by lua_readline. ** lua_freeline defines how to free a line read by lua_readline.
*/ */
#if defined(LUA_USE_READLINE) #if !defined(lua_readline) /* { */
#if defined(LUA_USE_READLINE) /* { */
#include <stdio.h>
#include <readline/readline.h> #include <readline/readline.h>
#include <readline/history.h> #include <readline/history.h>
#define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL) #define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL)
#define lua_saveline(L,idx) \ #define lua_saveline(L,line) ((void)L, add_history(line))
if (lua_rawlen(L,idx) > 0) /* non-empty line? */ \
add_history(lua_tostring(L, idx)); /* add it to history */
#define lua_freeline(L,b) ((void)L, free(b)) #define lua_freeline(L,b) ((void)L, free(b))
#elif !defined(lua_readline) #else /* }{ */
#define lua_readline(L,b,p) \ #define lua_readline(L,b,p) \
((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \ ((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \
fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */ fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */
#define lua_saveline(L,idx) { (void)L; (void)idx; } #define lua_saveline(L,line) { (void)L; (void)line; }
#define lua_freeline(L,b) { (void)L; (void)b; } #define lua_freeline(L,b) { (void)L; (void)b; }
#endif #endif /* } */
#endif /* } */
@ -90,33 +103,40 @@ static lua_State *globalL = NULL;
static const char *progname = LUA_PROGNAME; static const char *progname = LUA_PROGNAME;
/*
** Hook set by signal function to stop the interpreter.
*/
static void lstop (lua_State *L, lua_Debug *ar) { static void lstop (lua_State *L, lua_Debug *ar) {
(void)ar; /* unused arg. */ (void)ar; /* unused arg. */
lua_sethook(L, NULL, 0, 0); lua_sethook(L, NULL, 0, 0); /* reset hook */
luaL_error(L, "interrupted!"); luaL_error(L, "interrupted!");
} }
/*
** Function to be called at a C signal. Because a C signal cannot
** just change a Lua state (as there is no proper synchronization),
** this function only sets a hook that, when called, will stop the
** interpreter.
*/
static void laction (int i) { static void laction (int i) {
signal(i, SIG_DFL); /* if another SIGINT happens before lstop, signal(i, SIG_DFL); /* if another SIGINT happens, terminate process */
terminate process (default action) */
lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1); lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
} }
static void print_usage (const char *badoption) { static void print_usage (const char *badoption) {
luai_writestringerror("%s: ", progname); lua_writestringerror("%s: ", progname);
if (badoption[1] == 'e' || badoption[1] == 'l') if (badoption[1] == 'e' || badoption[1] == 'l')
luai_writestringerror("'%s' needs argument\n", badoption); lua_writestringerror("'%s' needs argument\n", badoption);
else else
luai_writestringerror("unrecognized option '%s'\n", badoption); lua_writestringerror("unrecognized option '%s'\n", badoption);
luai_writestringerror( lua_writestringerror(
"usage: %s [options] [script [args]]\n" "usage: %s [options] [script [args]]\n"
"Available options are:\n" "Available options are:\n"
" -e stat execute string " LUA_QL("stat") "\n" " -e stat execute string 'stat'\n"
" -i enter interactive mode after executing " LUA_QL("script") "\n" " -i enter interactive mode after executing 'script'\n"
" -l name require library " LUA_QL("name") "\n" " -l name require library 'name'\n"
" -v show version information\n" " -v show version information\n"
" -E ignore environment variables\n" " -E ignore environment variables\n"
" -- stop handling options\n" " -- stop handling options\n"
@ -126,101 +146,114 @@ static void print_usage (const char *badoption) {
} }
/*
** Prints an error message, adding the program name in front of it
** (if present)
*/
static void l_message (const char *pname, const char *msg) { static void l_message (const char *pname, const char *msg) {
if (pname) luai_writestringerror("%s: ", pname); if (pname) lua_writestringerror("%s: ", pname);
luai_writestringerror("%s\n", msg); lua_writestringerror("%s\n", msg);
} }
/*
** Check whether 'status' is not OK and, if so, prints the error
** message on the top of the stack. It assumes that the error object
** is a string, as it was either generated by Lua or by 'msghandler'.
*/
static int report (lua_State *L, int status) { static int report (lua_State *L, int status) {
if (status != LUA_OK && !lua_isnil(L, -1)) { if (status != LUA_OK) {
const char *msg = lua_tostring(L, -1); const char *msg = lua_tostring(L, -1);
if (msg == NULL) msg = "(error object is not a string)";
l_message(progname, msg); l_message(progname, msg);
lua_pop(L, 1); lua_pop(L, 1); /* remove message */
/* force a complete garbage collection in case of errors */
lua_gc(L, LUA_GCCOLLECT, 0);
} }
return status; return status;
} }
/* the next function is called unprotected, so it must avoid errors */ /*
static void finalreport (lua_State *L, int status) { ** Message handler used to run all chunks
if (status != LUA_OK) { */
const char *msg = (lua_type(L, -1) == LUA_TSTRING) ? lua_tostring(L, -1) static int msghandler (lua_State *L) {
: NULL;
if (msg == NULL) msg = "(error object is not a string)";
l_message(progname, msg);
lua_pop(L, 1);
}
}
static int traceback (lua_State *L) {
const char *msg = lua_tostring(L, 1); const char *msg = lua_tostring(L, 1);
if (msg) if (msg == NULL) { /* is error object not a string? */
luaL_traceback(L, L, msg, 1); if (luaL_callmeta(L, 1, "__tostring") && /* does it have a metamethod */
else if (!lua_isnoneornil(L, 1)) { /* is there an error object? */ lua_type(L, -1) == LUA_TSTRING) /* that produces a string? */
if (!luaL_callmeta(L, 1, "__tostring")) /* try its 'tostring' metamethod */ return 1; /* that is the message */
lua_pushliteral(L, "(no error message)"); else
msg = lua_pushfstring(L, "(error object is a %s value)",
luaL_typename(L, 1));
} }
return 1; luaL_traceback(L, L, msg, 1); /* append a standard traceback */
return 1; /* return the traceback */
} }
/*
** Interface to 'lua_pcall', which sets appropriate message function
** and C-signal handler. Used to run all chunks.
*/
static int docall (lua_State *L, int narg, int nres) { static int docall (lua_State *L, int narg, int nres) {
int status; int status;
int base = lua_gettop(L) - narg; /* function index */ int base = lua_gettop(L) - narg; /* function index */
lua_pushcfunction(L, traceback); /* push traceback function */ lua_pushcfunction(L, msghandler); /* push message handler */
lua_insert(L, base); /* put it under chunk and args */ lua_insert(L, base); /* put it under function and args */
globalL = L; /* to be available to 'laction' */ globalL = L; /* to be available to 'laction' */
signal(SIGINT, laction); signal(SIGINT, laction); /* set C-signal handler */
status = lua_pcall(L, narg, nres, base); status = lua_pcall(L, narg, nres, base);
signal(SIGINT, SIG_DFL); signal(SIGINT, SIG_DFL); /* reset C-signal handler */
lua_remove(L, base); /* remove traceback function */ lua_remove(L, base); /* remove message handler from the stack */
return status; return status;
} }
static void print_version (void) { static void print_version (void) {
luai_writestring(LUA_COPYRIGHT, strlen(LUA_COPYRIGHT)); lua_writestring(LUA_COPYRIGHT, strlen(LUA_COPYRIGHT));
luai_writeline(); lua_writeline();
} }
static int getargs (lua_State *L, char **argv, int n) { /*
int narg; ** Create the 'arg' table, which stores all arguments from the
int i; ** command line ('argv'). It should be aligned so that, at index 0,
int argc = 0; ** it has 'argv[script]', which is the script name. The arguments
while (argv[argc]) argc++; /* count total number of arguments */ ** to the script (everything after 'script') go to positive indices;
narg = argc - (n + 1); /* number of arguments to the script */ ** other arguments (before the script name) go to negative indices.
luaL_checkstack(L, narg + 3, "too many arguments to script"); ** If there is no script name, assume interpreter's name as base.
for (i=n+1; i < argc; i++) */
lua_pushstring(L, argv[i]); static void createargtable (lua_State *L, char **argv, int argc, int script) {
lua_createtable(L, narg, n + 1); int i, narg;
for (i=0; i < argc; i++) { if (script == argc) script = 0; /* no script name? */
narg = argc - (script + 1); /* number of positive indices */
lua_createtable(L, narg, script + 1);
for (i = 0; i < argc; i++) {
lua_pushstring(L, argv[i]); lua_pushstring(L, argv[i]);
lua_rawseti(L, -2, i - n); lua_rawseti(L, -2, i - script);
} }
return narg; lua_setglobal(L, "arg");
} }
static int dofile (lua_State *L, const char *name) { static int dochunk (lua_State *L, int status) {
int status = luaL_loadfile(L, name);
if (status == LUA_OK) status = docall(L, 0, 0); if (status == LUA_OK) status = docall(L, 0, 0);
return report(L, status); return report(L, status);
} }
static int dofile (lua_State *L, const char *name) {
return dochunk(L, luaL_loadfile(L, name));
}
static int dostring (lua_State *L, const char *s, const char *name) { static int dostring (lua_State *L, const char *s, const char *name) {
int status = luaL_loadbuffer(L, s, strlen(s), name); return dochunk(L, luaL_loadbuffer(L, s, strlen(s), name));
if (status == LUA_OK) status = docall(L, 0, 0);
return report(L, status);
} }
/*
** Calls 'require(name)' and stores the result in a global variable
** with the given name.
*/
static int dolibrary (lua_State *L, const char *name) { static int dolibrary (lua_State *L, const char *name) {
int status; int status;
lua_getglobal(L, "require"); lua_getglobal(L, "require");
@ -232,6 +265,9 @@ static int dolibrary (lua_State *L, const char *name) {
} }
/*
** Returns the string to be used as a prompt by the interpreter.
*/
static const char *get_prompt (lua_State *L, int firstline) { static const char *get_prompt (lua_State *L, int firstline) {
const char *p; const char *p;
lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2"); lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2");
@ -244,6 +280,12 @@ static const char *get_prompt (lua_State *L, int firstline) {
#define EOFMARK "<eof>" #define EOFMARK "<eof>"
#define marklen (sizeof(EOFMARK)/sizeof(char) - 1) #define marklen (sizeof(EOFMARK)/sizeof(char) - 1)
/*
** Check whether 'status' signals a syntax error and the error
** message at the top of the stack ends with the above mark for
** incomplete statements.
*/
static int incomplete (lua_State *L, int status) { static int incomplete (lua_State *L, int status) {
if (status == LUA_ERRSYNTAX) { if (status == LUA_ERRSYNTAX) {
size_t lmsg; size_t lmsg;
@ -257,163 +299,230 @@ static int incomplete (lua_State *L, int status) {
} }
/*
** Prompt the user, read a line, and push it into the Lua stack.
*/
static int pushline (lua_State *L, int firstline) { static int pushline (lua_State *L, int firstline) {
char buffer[LUA_MAXINPUT]; char buffer[LUA_MAXINPUT];
char *b = buffer; char *b = buffer;
size_t l; size_t l;
const char *prmt = get_prompt(L, firstline); const char *prmt = get_prompt(L, firstline);
int readstatus = lua_readline(L, b, prmt); int readstatus = lua_readline(L, b, prmt);
lua_pop(L, 1); /* remove result from 'get_prompt' */
if (readstatus == 0) if (readstatus == 0)
return 0; /* no input */ return 0; /* no input (prompt will be popped by caller) */
lua_pop(L, 1); /* remove prompt */
l = strlen(b); l = strlen(b);
if (l > 0 && b[l-1] == '\n') /* line ends with newline? */ if (l > 0 && b[l-1] == '\n') /* line ends with newline? */
b[l-1] = '\0'; /* remove it */ b[--l] = '\0'; /* remove it */
if (firstline && b[0] == '=') /* first line starts with `=' ? */ if (firstline && b[0] == '=') /* for compatibility with 5.2, ... */
lua_pushfstring(L, "return %s", b+1); /* change it to `return' */ lua_pushfstring(L, "return %s", b + 1); /* change '=' to 'return' */
else else
lua_pushstring(L, b); lua_pushlstring(L, b, l);
lua_freeline(L, b); lua_freeline(L, b);
return 1; return 1;
} }
/*
** Try to compile line on the stack as 'return <line>;'; on return, stack
** has either compiled chunk or original line (if compilation failed).
*/
static int addreturn (lua_State *L) {
const char *line = lua_tostring(L, -1); /* original line */
const char *retline = lua_pushfstring(L, "return %s;", line);
int status = luaL_loadbuffer(L, retline, strlen(retline), "=stdin");
if (status == LUA_OK) {
lua_remove(L, -2); /* remove modified line */
if (line[0] != '\0') /* non empty? */
lua_saveline(L, line); /* keep history */
}
else
lua_pop(L, 2); /* pop result from 'luaL_loadbuffer' and modified line */
return status;
}
/*
** Read multiple lines until a complete Lua statement
*/
static int multiline (lua_State *L) {
for (;;) { /* repeat until gets a complete statement */
size_t len;
const char *line = lua_tolstring(L, 1, &len); /* get what it has */
int status = luaL_loadbuffer(L, line, len, "=stdin"); /* try it */
if (!incomplete(L, status) || !pushline(L, 0)) {
lua_saveline(L, line); /* keep history */
return status; /* cannot or should not try to add continuation line */
}
lua_pushliteral(L, "\n"); /* add newline... */
lua_insert(L, -2); /* ...between the two lines */
lua_concat(L, 3); /* join them */
}
}
/*
** Read a line and try to load (compile) it first as an expression (by
** adding "return " in front of it) and second as a statement. Return
** the final status of load/call with the resulting function (if any)
** in the top of the stack.
*/
static int loadline (lua_State *L) { static int loadline (lua_State *L) {
int status; int status;
lua_settop(L, 0); lua_settop(L, 0);
if (!pushline(L, 1)) if (!pushline(L, 1))
return -1; /* no input */ return -1; /* no input */
for (;;) { /* repeat until gets a complete line */ if ((status = addreturn(L)) != LUA_OK) /* 'return ...' did not work? */
size_t l; status = multiline(L); /* try as command, maybe with continuation lines */
const char *line = lua_tolstring(L, 1, &l); lua_remove(L, 1); /* remove line from the stack */
status = luaL_loadbuffer(L, line, l, "=stdin"); lua_assert(lua_gettop(L) == 1);
if (!incomplete(L, status)) break; /* cannot try to add lines? */
if (!pushline(L, 0)) /* no more input? */
return -1;
lua_pushliteral(L, "\n"); /* add a new line... */
lua_insert(L, -2); /* ...between the two lines */
lua_concat(L, 3); /* join them */
}
lua_saveline(L, 1);
lua_remove(L, 1); /* remove line */
return status; return status;
} }
static void dotty (lua_State *L) { /*
** Prints (calling the Lua 'print' function) any values on the stack
*/
static void l_print (lua_State *L) {
int n = lua_gettop(L);
if (n > 0) { /* any result to be printed? */
luaL_checkstack(L, LUA_MINSTACK, "too many results to print");
lua_getglobal(L, "print");
lua_insert(L, 1);
if (lua_pcall(L, n, 0, 0) != LUA_OK)
l_message(progname, lua_pushfstring(L, "error calling 'print' (%s)",
lua_tostring(L, -1)));
}
}
/*
** Do the REPL: repeatedly read (load) a line, evaluate (call) it, and
** print any results.
*/
static void doREPL (lua_State *L) {
int status; int status;
const char *oldprogname = progname; const char *oldprogname = progname;
progname = NULL; progname = NULL; /* no 'progname' on errors in interactive mode */
while ((status = loadline(L)) != -1) { while ((status = loadline(L)) != -1) {
if (status == LUA_OK) status = docall(L, 0, LUA_MULTRET); if (status == LUA_OK)
report(L, status); status = docall(L, 0, LUA_MULTRET);
if (status == LUA_OK && lua_gettop(L) > 0) { /* any result to print? */ if (status == LUA_OK) l_print(L);
luaL_checkstack(L, LUA_MINSTACK, "too many results to print"); else report(L, status);
lua_getglobal(L, "print");
lua_insert(L, 1);
if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != LUA_OK)
l_message(progname, lua_pushfstring(L,
"error calling " LUA_QL("print") " (%s)",
lua_tostring(L, -1)));
}
} }
lua_settop(L, 0); /* clear stack */ lua_settop(L, 0); /* clear stack */
luai_writeline(); lua_writeline();
progname = oldprogname; progname = oldprogname;
} }
static int handle_script (lua_State *L, char **argv, int n) { /*
** Push on the stack the contents of table 'arg' from 1 to #arg
*/
static int pushargs (lua_State *L) {
int i, n;
if (lua_getglobal(L, "arg") != LUA_TTABLE)
luaL_error(L, "'arg' is not a table");
n = (int)luaL_len(L, -1);
luaL_checkstack(L, n + 3, "too many arguments to script");
for (i = 1; i <= n; i++)
lua_rawgeti(L, -i, i);
lua_remove(L, -i); /* remove table from the stack */
return n;
}
static int handle_script (lua_State *L, char **argv) {
int status; int status;
const char *fname; const char *fname = argv[0];
int narg = getargs(L, argv, n); /* collect arguments */ if (strcmp(fname, "-") == 0 && strcmp(argv[-1], "--") != 0)
lua_setglobal(L, "arg");
fname = argv[n];
if (strcmp(fname, "-") == 0 && strcmp(argv[n-1], "--") != 0)
fname = NULL; /* stdin */ fname = NULL; /* stdin */
status = luaL_loadfile(L, fname); status = luaL_loadfile(L, fname);
lua_insert(L, -(narg+1)); if (status == LUA_OK) {
if (status == LUA_OK) int n = pushargs(L); /* push arguments to script */
status = docall(L, narg, LUA_MULTRET); status = docall(L, n, LUA_MULTRET);
else }
lua_pop(L, narg);
return report(L, status); return report(L, status);
} }
/* check that argument has no extra characters at the end */
#define noextrachars(x) {if ((x)[2] != '\0') return -1;}
/* indices of various argument indicators in array args */
#define has_i 0 /* -i */
#define has_v 1 /* -v */
#define has_e 2 /* -e */
#define has_E 3 /* -E */
#define num_has 4 /* number of 'has_*' */
/* bits of various argument indicators in 'args' */
#define has_error 1 /* bad option */
#define has_i 2 /* -i */
#define has_v 4 /* -v */
#define has_e 8 /* -e */
#define has_E 16 /* -E */
static int collectargs (char **argv, int *args) { /*
** Traverses all arguments from 'argv', returning a mask with those
** needed before running any Lua code (or an error code if it finds
** any invalid argument). 'first' returns the first not-handled argument
** (either the script name or a bad argument in case of error).
*/
static int collectargs (char **argv, int *first) {
int args = 0;
int i; int i;
for (i = 1; argv[i] != NULL; i++) { for (i = 1; argv[i] != NULL; i++) {
*first = i;
if (argv[i][0] != '-') /* not an option? */ if (argv[i][0] != '-') /* not an option? */
return i; return args; /* stop handling options */
switch (argv[i][1]) { /* option */ switch (argv[i][1]) { /* else check option */
case '-': case '-': /* '--' */
noextrachars(argv[i]); if (argv[i][2] != '\0') /* extra characters after '--'? */
return (argv[i+1] != NULL ? i+1 : 0); return has_error; /* invalid option */
case '\0': *first = i + 1;
return i; return args;
case '\0': /* '-' */
return args; /* script "name" is '-' */
case 'E': case 'E':
args[has_E] = 1; if (argv[i][2] != '\0') /* extra characters after 1st? */
return has_error; /* invalid option */
args |= has_E;
break; break;
case 'i': case 'i':
noextrachars(argv[i]); args |= has_i; /* (-i implies -v) *//* FALLTHROUGH */
args[has_i] = 1; /* go through */
case 'v': case 'v':
noextrachars(argv[i]); if (argv[i][2] != '\0') /* extra characters after 1st? */
args[has_v] = 1; return has_error; /* invalid option */
args |= has_v;
break; break;
case 'e': case 'e':
args[has_e] = 1; /* go through */ args |= has_e; /* FALLTHROUGH */
case 'l': /* both options need an argument */ case 'l': /* both options need an argument */
if (argv[i][2] == '\0') { /* no concatenated argument? */ if (argv[i][2] == '\0') { /* no concatenated argument? */
i++; /* try next 'argv' */ i++; /* try next 'argv' */
if (argv[i] == NULL || argv[i][0] == '-') if (argv[i] == NULL || argv[i][0] == '-')
return -(i - 1); /* no next argument or it is another option */ return has_error; /* no next argument or it is another option */
} }
break; break;
default: /* invalid option; return its index... */ default: /* invalid option */
return -i; /* ...as a negative value */ return has_error;
} }
} }
return 0; *first = i; /* no script name */
return args;
} }
/*
** Processes options 'e' and 'l', which involve running Lua code.
** Returns 0 if some code raises an error.
*/
static int runargs (lua_State *L, char **argv, int n) { static int runargs (lua_State *L, char **argv, int n) {
int i; int i;
for (i = 1; i < n; i++) { for (i = 1; i < n; i++) {
lua_assert(argv[i][0] == '-'); int option = argv[i][1];
switch (argv[i][1]) { /* option */ lua_assert(argv[i][0] == '-'); /* already checked */
case 'e': { if (option == 'e' || option == 'l') {
const char *chunk = argv[i] + 2; int status;
if (*chunk == '\0') chunk = argv[++i]; const char *extra = argv[i] + 2; /* both options need an argument */
lua_assert(chunk != NULL); if (*extra == '\0') extra = argv[++i];
if (dostring(L, chunk, "=(command line)") != LUA_OK) lua_assert(extra != NULL);
return 0; status = (option == 'e')
break; ? dostring(L, extra, "=(command line)")
} : dolibrary(L, extra);
case 'l': { if (status != LUA_OK) return 0;
const char *filename = argv[i] + 2;
if (*filename == '\0') filename = argv[++i];
lua_assert(filename != NULL);
if (dolibrary(L, filename) != LUA_OK)
return 0; /* stop if file fails */
break;
}
default: break;
} }
} }
return 1; return 1;
@ -421,10 +530,10 @@ static int runargs (lua_State *L, char **argv, int n) {
static int handle_luainit (lua_State *L) { static int handle_luainit (lua_State *L) {
const char *name = "=" LUA_INITVERSION; const char *name = "=" LUA_INITVARVERSION;
const char *init = getenv(name + 1); const char *init = getenv(name + 1);
if (init == NULL) { if (init == NULL) {
name = "=" LUA_INIT; name = "=" LUA_INIT_VAR;
init = getenv(name + 1); /* try alternative name */ init = getenv(name + 1); /* try alternative name */
} }
if (init == NULL) return LUA_OK; if (init == NULL) return LUA_OK;
@ -435,40 +544,44 @@ static int handle_luainit (lua_State *L) {
} }
/*
** Main body of stand-alone interpreter (to be called in protected mode).
** Reads the options and handles them all.
*/
static int pmain (lua_State *L) { static int pmain (lua_State *L) {
int argc = (int)lua_tointeger(L, 1); int argc = (int)lua_tointeger(L, 1);
char **argv = (char **)lua_touserdata(L, 2); char **argv = (char **)lua_touserdata(L, 2);
int script; int script;
int args[num_has]; int args = collectargs(argv, &script);
args[has_i] = args[has_v] = args[has_e] = args[has_E] = 0; luaL_checkversion(L); /* check that interpreter has correct version */
if (argv[0] && argv[0][0]) progname = argv[0]; if (argv[0] && argv[0][0]) progname = argv[0];
script = collectargs(argv, args); if (args == has_error) { /* bad arg? */
if (script < 0) { /* invalid arg? */ print_usage(argv[script]); /* 'script' has index of bad arg. */
print_usage(argv[-script]);
return 0; return 0;
} }
if (args[has_v]) print_version(); if (args & has_v) /* option '-v'? */
if (args[has_E]) { /* option '-E'? */ print_version();
if (args & has_E) { /* option '-E'? */
lua_pushboolean(L, 1); /* signal for libraries to ignore env. vars. */ lua_pushboolean(L, 1); /* signal for libraries to ignore env. vars. */
lua_setfield(L, LUA_REGISTRYINDEX, "LUA_NOENV"); lua_setfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
} }
/* open standard libraries */ luaL_openlibs(L); /* open standard libraries */
luaL_checkversion(L); createargtable(L, argv, argc, script); /* create table 'arg' */
lua_gc(L, LUA_GCSTOP, 0); /* stop collector during initialization */ if (!(args & has_E)) { /* no option '-E'? */
luaL_openlibs(L); /* open libraries */ if (handle_luainit(L) != LUA_OK) /* run LUA_INIT */
lua_gc(L, LUA_GCRESTART, 0); return 0; /* error running LUA_INIT */
if (!args[has_E] && handle_luainit(L) != LUA_OK) }
return 0; /* error running LUA_INIT */ if (!runargs(L, argv, script)) /* execute arguments -e and -l */
/* execute arguments -e and -l */ return 0; /* something failed */
if (!runargs(L, argv, (script > 0) ? script : argc)) return 0; if (script < argc && /* execute main script (if there is one) */
/* execute main script (if there is one) */ handle_script(L, argv + script) != LUA_OK)
if (script && handle_script(L, argv, script) != LUA_OK) return 0; return 0;
if (args[has_i]) /* -i option? */ if (args & has_i) /* -i option? */
dotty(L); doREPL(L); /* do read-eval-print loop */
else if (script == 0 && !args[has_e] && !args[has_v]) { /* no arguments? */ else if (script == argc && !(args & (has_e | has_v))) { /* no arguments? */
if (lua_stdin_is_tty()) { if (lua_stdin_is_tty()) { /* running in interactive mode? */
print_version(); print_version();
dotty(L); doREPL(L); /* do read-eval-print loop */
} }
else dofile(L, NULL); /* executes stdin as a file */ else dofile(L, NULL); /* executes stdin as a file */
} }
@ -484,13 +597,12 @@ int main (int argc, char **argv) {
l_message(argv[0], "cannot create state: not enough memory"); l_message(argv[0], "cannot create state: not enough memory");
return EXIT_FAILURE; return EXIT_FAILURE;
} }
/* call 'pmain' in protected mode */ lua_pushcfunction(L, &pmain); /* to call 'pmain' in protected mode */
lua_pushcfunction(L, &pmain);
lua_pushinteger(L, argc); /* 1st argument */ lua_pushinteger(L, argc); /* 1st argument */
lua_pushlightuserdata(L, argv); /* 2nd argument */ lua_pushlightuserdata(L, argv); /* 2nd argument */
status = lua_pcall(L, 2, 1, 0); status = lua_pcall(L, 2, 1, 0); /* do the call */
result = lua_toboolean(L, -1); /* get result */ result = lua_toboolean(L, -1); /* get result */
finalreport(L, status); report(L, status);
lua_close(L); lua_close(L);
return (result && status == LUA_OK) ? EXIT_SUCCESS : EXIT_FAILURE; return (result && status == LUA_OK) ? EXIT_SUCCESS : EXIT_FAILURE;
} }

@ -1,17 +1,20 @@
/* /*
** $Id: luac.c,v 1.69 2011/11/29 17:46:33 lhf Exp $ ** $Id: luac.c,v 1.75 2015/03/12 01:58:27 lhf Exp $
** Lua compiler (saves bytecodes to files; also list bytecodes) ** Lua compiler (saves bytecodes to files; also lists bytecodes)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#define luac_c
#define LUA_CORE
#include "lprefix.h"
#include <ctype.h>
#include <errno.h> #include <errno.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define luac_c
#define LUA_CORE
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
@ -47,14 +50,14 @@ static void cannot(const char* what)
static void usage(const char* message) static void usage(const char* message)
{ {
if (*message=='-') if (*message=='-')
fprintf(stderr,"%s: unrecognized option " LUA_QS "\n",progname,message); fprintf(stderr,"%s: unrecognized option '%s'\n",progname,message);
else else
fprintf(stderr,"%s: %s\n",progname,message); fprintf(stderr,"%s: %s\n",progname,message);
fprintf(stderr, fprintf(stderr,
"usage: %s [options] [filenames]\n" "usage: %s [options] [filenames]\n"
"Available options are:\n" "Available options are:\n"
" -l list (use -l -l for full listing)\n" " -l list (use -l -l for full listing)\n"
" -o name output to file " LUA_QL("name") " (default is \"%s\")\n" " -o name output to file 'name' (default is \"%s\")\n"
" -p parse only\n" " -p parse only\n"
" -s strip debug information\n" " -s strip debug information\n"
" -v show version information\n" " -v show version information\n"
@ -89,7 +92,7 @@ static int doargs(int argc, char* argv[])
{ {
output=argv[++i]; output=argv[++i];
if (output==NULL || *output==0 || (*output=='-' && output[1]!=0)) if (output==NULL || *output==0 || (*output=='-' && output[1]!=0))
usage(LUA_QL("-o") " needs argument"); usage("'-o' needs argument");
if (IS("-")) output=NULL; if (IS("-")) output=NULL;
} }
else if (IS("-p")) /* parse only */ else if (IS("-p")) /* parse only */
@ -203,7 +206,7 @@ int main(int argc, char* argv[])
} }
/* /*
** $Id: print.c,v 1.69 2013/07/04 01:03:46 lhf Exp $ ** $Id: luac.c,v 1.75 2015/03/12 01:58:27 lhf Exp $
** print bytecodes ** print bytecodes
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -223,7 +226,7 @@ int main(int argc, char* argv[])
static void PrintString(const TString* ts) static void PrintString(const TString* ts)
{ {
const char* s=getstr(ts); const char* s=getstr(ts);
size_t i,n=ts->tsv.len; size_t i,n=tsslen(ts);
printf("%c",'"'); printf("%c",'"');
for (i=0; i<n; i++) for (i=0; i<n; i++)
{ {
@ -251,7 +254,7 @@ static void PrintString(const TString* ts)
static void PrintConstant(const Proto* f, int i) static void PrintConstant(const Proto* f, int i)
{ {
const TValue* o=&f->k[i]; const TValue* o=&f->k[i];
switch (ttypenv(o)) switch (ttype(o))
{ {
case LUA_TNIL: case LUA_TNIL:
printf("nil"); printf("nil");
@ -259,11 +262,19 @@ static void PrintConstant(const Proto* f, int i)
case LUA_TBOOLEAN: case LUA_TBOOLEAN:
printf(bvalue(o) ? "true" : "false"); printf(bvalue(o) ? "true" : "false");
break; break;
case LUA_TNUMBER: case LUA_TNUMFLT:
printf(LUA_NUMBER_FMT,nvalue(o)); {
char buff[100];
sprintf(buff,LUA_NUMBER_FMT,fltvalue(o));
printf("%s",buff);
if (buff[strspn(buff,"-0123456789")]=='\0') printf(".0");
break;
}
case LUA_TNUMINT:
printf(LUA_INTEGER_FMT,ivalue(o));
break; break;
case LUA_TSTRING: case LUA_TSHRSTR: case LUA_TLNGSTR:
PrintString(rawtsvalue(o)); PrintString(tsvalue(o));
break; break;
default: /* cannot happen */ default: /* cannot happen */
printf("? type=%d",ttype(o)); printf("? type=%d",ttype(o));
@ -337,8 +348,14 @@ static void PrintCode(const Proto* f)
case OP_ADD: case OP_ADD:
case OP_SUB: case OP_SUB:
case OP_MUL: case OP_MUL:
case OP_DIV:
case OP_POW: case OP_POW:
case OP_DIV:
case OP_IDIV:
case OP_BAND:
case OP_BOR:
case OP_BXOR:
case OP_SHL:
case OP_SHR:
case OP_EQ: case OP_EQ:
case OP_LT: case OP_LT:
case OP_LE: case OP_LE:

@ -1,14 +1,17 @@
/* /*
** $Id: lundump.c,v 2.22.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lundump.c,v 2.44 2015/11/02 16:09:30 roberto Exp $
** load precompiled Lua chunks ** load precompiled Lua chunks
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <string.h>
#define lundump_c #define lundump_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include <string.h>
#include "lua.h" #include "lua.h"
#include "ldebug.h" #include "ldebug.h"
@ -20,239 +23,257 @@
#include "lundump.h" #include "lundump.h"
#include "lzio.h" #include "lzio.h"
#if !defined(luai_verifycode)
#define luai_verifycode(L,b,f) /* empty */
#endif
typedef struct { typedef struct {
lua_State* L; lua_State *L;
ZIO* Z; ZIO *Z;
Mbuffer* b; const char *name;
const char* name;
} LoadState; } LoadState;
static l_noret error(LoadState* S, const char* why)
{ static l_noret error(LoadState *S, const char *why) {
luaO_pushfstring(S->L,"%s: %s precompiled chunk",S->name,why); luaO_pushfstring(S->L, "%s: %s precompiled chunk", S->name, why);
luaD_throw(S->L,LUA_ERRSYNTAX); luaD_throw(S->L, LUA_ERRSYNTAX);
} }
#define LoadMem(S,b,n,size) LoadBlock(S,b,(n)*(size))
#define LoadByte(S) (lu_byte)LoadChar(S)
#define LoadVar(S,x) LoadMem(S,&x,1,sizeof(x))
#define LoadVector(S,b,n,size) LoadMem(S,b,n,size)
#if !defined(luai_verifycode) /*
#define luai_verifycode(L,b,f) /* empty */ ** All high-level loads go through LoadVector; you can change it to
#endif ** adapt to the endianness of the input
*/
#define LoadVector(S,b,n) LoadBlock(S,b,(n)*sizeof((b)[0]))
static void LoadBlock(LoadState* S, void* b, size_t size) static void LoadBlock (LoadState *S, void *b, size_t size) {
{ if (luaZ_read(S->Z, b, size) != 0)
if (luaZ_read(S->Z,b,size)!=0) error(S,"truncated"); error(S, "truncated");
} }
static int LoadChar(LoadState* S)
{ #define LoadVar(S,x) LoadVector(S,&x,1)
char x;
LoadVar(S,x);
return x; static lu_byte LoadByte (LoadState *S) {
lu_byte x;
LoadVar(S, x);
return x;
} }
static int LoadInt(LoadState* S)
{ static int LoadInt (LoadState *S) {
int x; int x;
LoadVar(S,x); LoadVar(S, x);
if (x<0) error(S,"corrupted"); return x;
return x;
} }
static lua_Number LoadNumber(LoadState* S)
{ static lua_Number LoadNumber (LoadState *S) {
lua_Number x; lua_Number x;
LoadVar(S,x); LoadVar(S, x);
return x; return x;
} }
static TString* LoadString(LoadState* S)
{ static lua_Integer LoadInteger (LoadState *S) {
size_t size; lua_Integer x;
LoadVar(S,size); LoadVar(S, x);
if (size==0) return x;
return NULL;
else
{
char* s=luaZ_openspace(S->L,S->b,size);
LoadBlock(S,s,size*sizeof(char));
return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
}
} }
static void LoadCode(LoadState* S, Proto* f)
{ static TString *LoadString (LoadState *S) {
int n=LoadInt(S); size_t size = LoadByte(S);
f->code=luaM_newvector(S->L,n,Instruction); if (size == 0xFF)
f->sizecode=n; LoadVar(S, size);
LoadVector(S,f->code,n,sizeof(Instruction)); if (size == 0)
return NULL;
else if (--size <= LUAI_MAXSHORTLEN) { /* short string? */
char buff[LUAI_MAXSHORTLEN];
LoadVector(S, buff, size);
return luaS_newlstr(S->L, buff, size);
}
else { /* long string */
TString *ts = luaS_createlngstrobj(S->L, size);
LoadVector(S, getstr(ts), size); /* load directly in final place */
return ts;
}
} }
static void LoadFunction(LoadState* S, Proto* f);
static void LoadCode (LoadState *S, Proto *f) {
static void LoadConstants(LoadState* S, Proto* f) int n = LoadInt(S);
{ f->code = luaM_newvector(S->L, n, Instruction);
int i,n; f->sizecode = n;
n=LoadInt(S); LoadVector(S, f->code, n);
f->k=luaM_newvector(S->L,n,TValue); }
f->sizek=n;
for (i=0; i<n; i++) setnilvalue(&f->k[i]);
for (i=0; i<n; i++) static void LoadFunction(LoadState *S, Proto *f, TString *psource);
{
TValue* o=&f->k[i];
int t=LoadChar(S); static void LoadConstants (LoadState *S, Proto *f) {
switch (t) int i;
{ int n = LoadInt(S);
case LUA_TNIL: f->k = luaM_newvector(S->L, n, TValue);
setnilvalue(o); f->sizek = n;
break; for (i = 0; i < n; i++)
case LUA_TBOOLEAN: setnilvalue(&f->k[i]);
setbvalue(o,LoadChar(S)); for (i = 0; i < n; i++) {
break; TValue *o = &f->k[i];
case LUA_TNUMBER: int t = LoadByte(S);
setnvalue(o,LoadNumber(S)); switch (t) {
break; case LUA_TNIL:
case LUA_TSTRING: setnilvalue(o);
setsvalue2n(S->L,o,LoadString(S)); break;
break; case LUA_TBOOLEAN:
default: lua_assert(0); setbvalue(o, LoadByte(S));
break;
case LUA_TNUMFLT:
setfltvalue(o, LoadNumber(S));
break;
case LUA_TNUMINT:
setivalue(o, LoadInteger(S));
break;
case LUA_TSHRSTR:
case LUA_TLNGSTR:
setsvalue2n(S->L, o, LoadString(S));
break;
default:
lua_assert(0);
}
} }
}
n=LoadInt(S);
f->p=luaM_newvector(S->L,n,Proto*);
f->sizep=n;
for (i=0; i<n; i++) f->p[i]=NULL;
for (i=0; i<n; i++)
{
f->p[i]=luaF_newproto(S->L);
LoadFunction(S,f->p[i]);
}
} }
static void LoadUpvalues(LoadState* S, Proto* f)
{ static void LoadProtos (LoadState *S, Proto *f) {
int i,n; int i;
n=LoadInt(S); int n = LoadInt(S);
f->upvalues=luaM_newvector(S->L,n,Upvaldesc); f->p = luaM_newvector(S->L, n, Proto *);
f->sizeupvalues=n; f->sizep = n;
for (i=0; i<n; i++) f->upvalues[i].name=NULL; for (i = 0; i < n; i++)
for (i=0; i<n; i++) f->p[i] = NULL;
{ for (i = 0; i < n; i++) {
f->upvalues[i].instack=LoadByte(S); f->p[i] = luaF_newproto(S->L);
f->upvalues[i].idx=LoadByte(S); LoadFunction(S, f->p[i], f->source);
} }
} }
static void LoadDebug(LoadState* S, Proto* f)
{ static void LoadUpvalues (LoadState *S, Proto *f) {
int i,n; int i, n;
f->source=LoadString(S); n = LoadInt(S);
n=LoadInt(S); f->upvalues = luaM_newvector(S->L, n, Upvaldesc);
f->lineinfo=luaM_newvector(S->L,n,int); f->sizeupvalues = n;
f->sizelineinfo=n; for (i = 0; i < n; i++)
LoadVector(S,f->lineinfo,n,sizeof(int)); f->upvalues[i].name = NULL;
n=LoadInt(S); for (i = 0; i < n; i++) {
f->locvars=luaM_newvector(S->L,n,LocVar); f->upvalues[i].instack = LoadByte(S);
f->sizelocvars=n; f->upvalues[i].idx = LoadByte(S);
for (i=0; i<n; i++) f->locvars[i].varname=NULL; }
for (i=0; i<n; i++)
{
f->locvars[i].varname=LoadString(S);
f->locvars[i].startpc=LoadInt(S);
f->locvars[i].endpc=LoadInt(S);
}
n=LoadInt(S);
for (i=0; i<n; i++) f->upvalues[i].name=LoadString(S);
} }
static void LoadFunction(LoadState* S, Proto* f)
{ static void LoadDebug (LoadState *S, Proto *f) {
f->linedefined=LoadInt(S); int i, n;
f->lastlinedefined=LoadInt(S); n = LoadInt(S);
f->numparams=LoadByte(S); f->lineinfo = luaM_newvector(S->L, n, int);
f->is_vararg=LoadByte(S); f->sizelineinfo = n;
f->maxstacksize=LoadByte(S); LoadVector(S, f->lineinfo, n);
LoadCode(S,f); n = LoadInt(S);
LoadConstants(S,f); f->locvars = luaM_newvector(S->L, n, LocVar);
LoadUpvalues(S,f); f->sizelocvars = n;
LoadDebug(S,f); for (i = 0; i < n; i++)
f->locvars[i].varname = NULL;
for (i = 0; i < n; i++) {
f->locvars[i].varname = LoadString(S);
f->locvars[i].startpc = LoadInt(S);
f->locvars[i].endpc = LoadInt(S);
}
n = LoadInt(S);
for (i = 0; i < n; i++)
f->upvalues[i].name = LoadString(S);
} }
/* the code below must be consistent with the code in luaU_header */
#define N0 LUAC_HEADERSIZE static void LoadFunction (LoadState *S, Proto *f, TString *psource) {
#define N1 (sizeof(LUA_SIGNATURE)-sizeof(char)) f->source = LoadString(S);
#define N2 N1+2 if (f->source == NULL) /* no source in dump? */
#define N3 N2+6 f->source = psource; /* reuse parent's source */
f->linedefined = LoadInt(S);
static void LoadHeader(LoadState* S) f->lastlinedefined = LoadInt(S);
{ f->numparams = LoadByte(S);
lu_byte h[LUAC_HEADERSIZE]; f->is_vararg = LoadByte(S);
lu_byte s[LUAC_HEADERSIZE]; f->maxstacksize = LoadByte(S);
luaU_header(h); LoadCode(S, f);
memcpy(s,h,sizeof(char)); /* first char already read */ LoadConstants(S, f);
LoadBlock(S,s+sizeof(char),LUAC_HEADERSIZE-sizeof(char)); LoadUpvalues(S, f);
if (memcmp(h,s,N0)==0) return; LoadProtos(S, f);
if (memcmp(h,s,N1)!=0) error(S,"not a"); LoadDebug(S, f);
if (memcmp(h,s,N2)!=0) error(S,"version mismatch in");
if (memcmp(h,s,N3)!=0) error(S,"incompatible"); else error(S,"corrupted");
} }
/*
** load precompiled chunk static void checkliteral (LoadState *S, const char *s, const char *msg) {
*/ char buff[sizeof(LUA_SIGNATURE) + sizeof(LUAC_DATA)]; /* larger than both */
Closure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name) size_t len = strlen(s);
{ LoadVector(S, buff, len);
LoadState S; if (memcmp(s, buff, len) != 0)
Closure* cl; error(S, msg);
if (*name=='@' || *name=='=') }
S.name=name+1;
else if (*name==LUA_SIGNATURE[0])
S.name="binary string"; static void fchecksize (LoadState *S, size_t size, const char *tname) {
else if (LoadByte(S) != size)
S.name=name; error(S, luaO_pushfstring(S->L, "%s size mismatch in", tname));
S.L=L; }
S.Z=Z;
S.b=buff;
LoadHeader(&S); #define checksize(S,t) fchecksize(S,sizeof(t),#t)
cl=luaF_newLclosure(L,1);
setclLvalue(L,L->top,cl); incr_top(L); static void checkHeader (LoadState *S) {
cl->l.p=luaF_newproto(L); checkliteral(S, LUA_SIGNATURE + 1, "not a"); /* 1st char already checked */
LoadFunction(&S,cl->l.p); if (LoadByte(S) != LUAC_VERSION)
if (cl->l.p->sizeupvalues != 1) error(S, "version mismatch in");
{ if (LoadByte(S) != LUAC_FORMAT)
Proto* p=cl->l.p; error(S, "format mismatch in");
cl=luaF_newLclosure(L,cl->l.p->sizeupvalues); checkliteral(S, LUAC_DATA, "corrupted");
cl->l.p=p; checksize(S, int);
setclLvalue(L,L->top-1,cl); checksize(S, size_t);
} checksize(S, Instruction);
luai_verifycode(L,buff,cl->l.p); checksize(S, lua_Integer);
return cl; checksize(S, lua_Number);
if (LoadInteger(S) != LUAC_INT)
error(S, "endianness mismatch in");
if (LoadNumber(S) != LUAC_NUM)
error(S, "float format mismatch in");
} }
#define MYINT(s) (s[0]-'0')
#define VERSION MYINT(LUA_VERSION_MAJOR)*16+MYINT(LUA_VERSION_MINOR)
#define FORMAT 0 /* this is the official format */
/* /*
* make header for precompiled chunks ** load precompiled chunk
* if you change the code below be sure to update LoadHeader and FORMAT above
* and LUAC_HEADERSIZE in lundump.h
*/ */
void luaU_header (lu_byte* h) LClosure *luaU_undump(lua_State *L, ZIO *Z, const char *name) {
{ LoadState S;
int x=1; LClosure *cl;
memcpy(h,LUA_SIGNATURE,sizeof(LUA_SIGNATURE)-sizeof(char)); if (*name == '@' || *name == '=')
h+=sizeof(LUA_SIGNATURE)-sizeof(char); S.name = name + 1;
*h++=cast_byte(VERSION); else if (*name == LUA_SIGNATURE[0])
*h++=cast_byte(FORMAT); S.name = "binary string";
*h++=cast_byte(*(char*)&x); /* endianness */ else
*h++=cast_byte(sizeof(int)); S.name = name;
*h++=cast_byte(sizeof(size_t)); S.L = L;
*h++=cast_byte(sizeof(Instruction)); S.Z = Z;
*h++=cast_byte(sizeof(lua_Number)); checkHeader(&S);
*h++=cast_byte(((lua_Number)0.5)==0); /* is lua_Number integral? */ cl = luaF_newLclosure(L, LoadByte(&S));
memcpy(h,LUAC_TAIL,sizeof(LUAC_TAIL)-sizeof(char)); setclLvalue(L, L->top, cl);
luaD_inctop(L);
cl->p = luaF_newproto(L);
LoadFunction(&S, cl->p, NULL);
lua_assert(cl->nupvalues == cl->p->sizeupvalues);
luai_verifycode(L, buff, cl->p);
return cl;
} }

@ -0,0 +1,256 @@
/*
** $Id: lutf8lib.c,v 1.15 2015/03/28 19:16:55 roberto Exp $
** Standard library for UTF-8 manipulation
** See Copyright Notice in lua.h
*/
#define lutf8lib_c
#define LUA_LIB
#include "lprefix.h"
#include <assert.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
#define MAXUNICODE 0x10FFFF
#define iscont(p) ((*(p) & 0xC0) == 0x80)
/* from strlib */
/* translate a relative string position: negative means back from end */
static lua_Integer u_posrelat (lua_Integer pos, size_t len) {
if (pos >= 0) return pos;
else if (0u - (size_t)pos > len) return 0;
else return (lua_Integer)len + pos + 1;
}
/*
** Decode one UTF-8 sequence, returning NULL if byte sequence is invalid.
*/
static const char *utf8_decode (const char *o, int *val) {
static const unsigned int limits[] = {0xFF, 0x7F, 0x7FF, 0xFFFF};
const unsigned char *s = (const unsigned char *)o;
unsigned int c = s[0];
unsigned int res = 0; /* final result */
if (c < 0x80) /* ascii? */
res = c;
else {
int count = 0; /* to count number of continuation bytes */
while (c & 0x40) { /* still have continuation bytes? */
int cc = s[++count]; /* read next byte */
if ((cc & 0xC0) != 0x80) /* not a continuation byte? */
return NULL; /* invalid byte sequence */
res = (res << 6) | (cc & 0x3F); /* add lower 6 bits from cont. byte */
c <<= 1; /* to test next bit */
}
res |= ((c & 0x7F) << (count * 5)); /* add first byte */
if (count > 3 || res > MAXUNICODE || res <= limits[count])
return NULL; /* invalid byte sequence */
s += count; /* skip continuation bytes read */
}
if (val) *val = res;
return (const char *)s + 1; /* +1 to include first byte */
}
/*
** utf8len(s [, i [, j]]) --> number of characters that start in the
** range [i,j], or nil + current position if 's' is not well formed in
** that interval
*/
static int utflen (lua_State *L) {
int n = 0;
size_t len;
const char *s = luaL_checklstring(L, 1, &len);
lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
lua_Integer posj = u_posrelat(luaL_optinteger(L, 3, -1), len);
luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 2,
"initial position out of string");
luaL_argcheck(L, --posj < (lua_Integer)len, 3,
"final position out of string");
while (posi <= posj) {
const char *s1 = utf8_decode(s + posi, NULL);
if (s1 == NULL) { /* conversion error? */
lua_pushnil(L); /* return nil ... */
lua_pushinteger(L, posi + 1); /* ... and current position */
return 2;
}
posi = s1 - s;
n++;
}
lua_pushinteger(L, n);
return 1;
}
/*
** codepoint(s, [i, [j]]) -> returns codepoints for all characters
** that start in the range [i,j]
*/
static int codepoint (lua_State *L) {
size_t len;
const char *s = luaL_checklstring(L, 1, &len);
lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
lua_Integer pose = u_posrelat(luaL_optinteger(L, 3, posi), len);
int n;
const char *se;
luaL_argcheck(L, posi >= 1, 2, "out of range");
luaL_argcheck(L, pose <= (lua_Integer)len, 3, "out of range");
if (posi > pose) return 0; /* empty interval; return no values */
if (pose - posi >= INT_MAX) /* (lua_Integer -> int) overflow? */
return luaL_error(L, "string slice too long");
n = (int)(pose - posi) + 1;
luaL_checkstack(L, n, "string slice too long");
n = 0;
se = s + pose;
for (s += posi - 1; s < se;) {
int code;
s = utf8_decode(s, &code);
if (s == NULL)
return luaL_error(L, "invalid UTF-8 code");
lua_pushinteger(L, code);
n++;
}
return n;
}
static void pushutfchar (lua_State *L, int arg) {
lua_Integer code = luaL_checkinteger(L, arg);
luaL_argcheck(L, 0 <= code && code <= MAXUNICODE, arg, "value out of range");
lua_pushfstring(L, "%U", (long)code);
}
/*
** utfchar(n1, n2, ...) -> char(n1)..char(n2)...
*/
static int utfchar (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
if (n == 1) /* optimize common case of single char */
pushutfchar(L, 1);
else {
int i;
luaL_Buffer b;
luaL_buffinit(L, &b);
for (i = 1; i <= n; i++) {
pushutfchar(L, i);
luaL_addvalue(&b);
}
luaL_pushresult(&b);
}
return 1;
}
/*
** offset(s, n, [i]) -> index where n-th character counting from
** position 'i' starts; 0 means character at 'i'.
*/
static int byteoffset (lua_State *L) {
size_t len;
const char *s = luaL_checklstring(L, 1, &len);
lua_Integer n = luaL_checkinteger(L, 2);
lua_Integer posi = (n >= 0) ? 1 : len + 1;
posi = u_posrelat(luaL_optinteger(L, 3, posi), len);
luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 3,
"position out of range");
if (n == 0) {
/* find beginning of current byte sequence */
while (posi > 0 && iscont(s + posi)) posi--;
}
else {
if (iscont(s + posi))
luaL_error(L, "initial position is a continuation byte");
if (n < 0) {
while (n < 0 && posi > 0) { /* move back */
do { /* find beginning of previous character */
posi--;
} while (posi > 0 && iscont(s + posi));
n++;
}
}
else {
n--; /* do not move for 1st character */
while (n > 0 && posi < (lua_Integer)len) {
do { /* find beginning of next character */
posi++;
} while (iscont(s + posi)); /* (cannot pass final '\0') */
n--;
}
}
}
if (n == 0) /* did it find given character? */
lua_pushinteger(L, posi + 1);
else /* no such character */
lua_pushnil(L);
return 1;
}
static int iter_aux (lua_State *L) {
size_t len;
const char *s = luaL_checklstring(L, 1, &len);
lua_Integer n = lua_tointeger(L, 2) - 1;
if (n < 0) /* first iteration? */
n = 0; /* start from here */
else if (n < (lua_Integer)len) {
n++; /* skip current byte */
while (iscont(s + n)) n++; /* and its continuations */
}
if (n >= (lua_Integer)len)
return 0; /* no more codepoints */
else {
int code;
const char *next = utf8_decode(s + n, &code);
if (next == NULL || iscont(next))
return luaL_error(L, "invalid UTF-8 code");
lua_pushinteger(L, n + 1);
lua_pushinteger(L, code);
return 2;
}
}
static int iter_codes (lua_State *L) {
luaL_checkstring(L, 1);
lua_pushcfunction(L, iter_aux);
lua_pushvalue(L, 1);
lua_pushinteger(L, 0);
return 3;
}
/* pattern to match a single UTF-8 character */
#define UTF8PATT "[\0-\x7F\xC2-\xF4][\x80-\xBF]*"
static const luaL_Reg funcs[] = {
{"offset", byteoffset},
{"codepoint", codepoint},
{"char", utfchar},
{"len", utflen},
{"codes", iter_codes},
/* placeholders */
{"charpattern", NULL},
{NULL, NULL}
};
LUAMOD_API int luaopen_utf8 (lua_State *L) {
luaL_newlib(L, funcs);
lua_pushlstring(L, UTF8PATT, sizeof(UTF8PATT)/sizeof(char) - 1);
lua_setfield(L, -2, "charpattern");
return 1;
}

File diff suppressed because it is too large Load Diff

@ -1,15 +1,17 @@
/* /*
** $Id: lzio.c,v 1.35.1.1 2013/04/12 18:48:47 roberto Exp $ ** $Id: lzio.c,v 1.37 2015/09/08 15:41:05 roberto Exp $
** Buffered streams ** Buffered streams
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <string.h>
#define lzio_c #define lzio_c
#define LUA_CORE #define LUA_CORE
#include "lprefix.h"
#include <string.h>
#include "lua.h" #include "lua.h"
#include "llimits.h" #include "llimits.h"
@ -64,13 +66,3 @@ size_t luaZ_read (ZIO *z, void *b, size_t n) {
return 0; return 0;
} }
/* ------------------------------------------------------------------------ */
char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
if (n > buff->buffsize) {
if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
luaZ_resizebuffer(L, buff, n);
}
return buff->buffer;
}