Warmist
parent
7969a701c3
commit
3afa35df61
@ -0,0 +1,38 @@
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#ifndef LUASTUFF_H
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#define LUASTUFF_H
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#include <string>
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using std::string;
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extern "C" {
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#include "lua.h"
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#include "lauxlib.h"
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#include "lualib.h"
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}
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//#include "lune.h"
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#include "luaxx.hpp"
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namespace lua
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{
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//global lua state singleton
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class glua
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{
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public:
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static state &Get();
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private:
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glua();
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static glua *ptr;
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state mystate;
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};
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//registers basic lua commands
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void RegBasics(lua::state &L);
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//dumps lua function trace, useless unless called from lua.
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string DebugDump(lua::state &L);
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//register functions, first registers into global scope, second into current table
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void RegFunctions(lua::state &L,luaL_reg const *arr);
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void RegFunctionsLocal(lua::state &L,luaL_reg const *arr);
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}
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#endif // LUASTUFF_H
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@ -0,0 +1,525 @@
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/* vim: set et sw=3 tw=0 fo=croqlaw cino=t0:
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*
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* Luaxx, the C++ Lua wrapper library.
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* Copyright (c) 2006-2008 Matthew Nicholson
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef LUAXX_H
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#define LUAXX_H
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#define lua_Integer_long 1
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#define lua_Integer_int 1
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#include <lua.hpp>
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#include <string>
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#include <vector>
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#include <new>
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#include <exception>
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/** @file
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* Luaxx header file.
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*/
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/** @mainpage Luaxx
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*
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* Luaxx is a thin wrapper around the Lua C API. The wrapper adds some
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* convenience functions and integrates well with modern C++.
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*
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* Luaxx is not designed like toLua, instead Luaxx is more of a 1 to 1
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* logical mapping of the lua API in C++. For example: in C you would write
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* 'lua_pushnumber(L, 3)', in C++ with Luaxx you would write
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* 'L.push(3)'.
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*
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* Every thing is contained in the 'lua' namespace and exceptions are thrown
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* when a lua API function returns an error. Most of the functionality is
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* contained in the lua::state class, which can be passed directly to lua C API
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* functions (the compiler will automatically use the internal lua_State
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* pointer). See the documentation for that class for more information.
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*/
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namespace lua
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{
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void StackDump(lua_State *L);
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/** A generic lua exception.
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*/
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class exception : public std::exception {
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public:
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/// Constructor.
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exception() : std::exception() { }
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/// Constructor.
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explicit exception(const char* desc) : std::exception(), description(desc) { }
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virtual ~exception() throw() { }
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/** Get a description of the error.
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* @returns a C-string describing the error
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*/
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virtual const char* what() const throw() {
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return description.c_str();
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}
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private:
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std::string description;
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};
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/** A lua runtime error.
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* This is thrown when there was an error executing some lua code.
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* @note This is not an std::runtime error.
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*/
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class runtime_error : public exception {
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public:
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/// Constructor.
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runtime_error() : exception() { }
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/// Constructor.
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explicit runtime_error(const char* desc) : exception(desc) { }
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virtual ~runtime_error() throw() { }
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};
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/** A syntax error.
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*/
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class syntax_error : public exception {
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public:
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/// Constructor.
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syntax_error() : exception() { }
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/// Constructor.
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explicit syntax_error(const char* desc) : exception(desc) { }
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virtual ~syntax_error() throw() { }
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};
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/** An error loading a lua file.
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* This is thrown when a call to lua::loadfile failed because the file could
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* not be opened or read.
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*/
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class file_error : public exception {
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public:
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/// Constructor.
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file_error() : exception() { }
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/// Constructor.
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explicit file_error(const char* desc) : exception(desc) { }
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virtual ~file_error() throw() { }
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};
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/** A memory allocation error.
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*/
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class bad_alloc : public exception, std::bad_alloc {
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public:
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/// Constructor.
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bad_alloc() : lua::exception(), std::bad_alloc() { }
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/// Constructor.
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explicit bad_alloc(const char* desc) : lua::exception(desc), std::bad_alloc() { }
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virtual ~bad_alloc() throw() { }
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};
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/** An error converting a lua type.
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*/
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class bad_conversion : public exception {
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public:
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/// Constructor.
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bad_conversion() : exception() { }
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/// Constructor.
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explicit bad_conversion(const char* desc) : exception(desc) { }
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virtual ~bad_conversion() throw() { }
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};
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/// A Lua table (this class does not have any data).
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class table { };
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/// A Lua nil (this class does not have any data).
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class nil { };
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/// A lua function (not a cfunction).
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class function { };
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/// A lua userdatum
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class userdata { };
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/// A lua light userdatum
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class lightuserdata { };
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typedef lua_CFunction cfunction; ///< A cfunction on the lua statck
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typedef lua_Integer integer; ///< The default lua integer type
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typedef lua_Number number; ///< The default lua number type
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typedef lua_Reader reader; ///< The type of function used by lua_load
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const int multiret = LUA_MULTRET; ///< LUA_MULTIRET
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/** This is the Luaxx equivalent of lua_State.
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* The functions provided by this class, closely resemble those of the Lua C
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* API.
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*/
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void StackDump(lua_State *L);
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class state {
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public:
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state();
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state(lua_State* L);
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state(const state& t)
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{
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managed=false;
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L=t.L;
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}
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state& operator = (const state& t);
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~state();
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operator lua_State*();
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state& push();
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state& push(nil);
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state& push(bool boolean);
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template<typename T> state& push(T number);
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state& push(const char* s, size_t length);
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state& push(const char* s);
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state& push(const std::string& s);
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state& push(cfunction f);
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state& push(table);
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state& push(void* p);
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template<typename T> state& pushlightuserdata(T p);
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template<typename T> state& to(T& number, int index = -1);
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template<typename T> state& touserdata(T& p, int index = -1);
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template<typename T> T as(T default_value, int index = -1);
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template<typename T> T as(int index = -1);
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template<typename T> T vpop()
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{
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T ret;
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ret=as<T>();
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pop();
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return ret;
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}
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template<typename T> bool is(int index = -1);
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state& check(int narg);
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#ifndef lua_Integer_int
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state& check(int& i, int narg);
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#endif
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state& check(integer& i, int narg);
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#ifndef lua_Integer_long
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state& check(long& l, int narg);
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#endif
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state& check(std::string& s, int narg);
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state& check(number& n, int narg);
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template<typename msg_t> void error(msg_t message);
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#if 0
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template<> void error(const std::string& message);
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#endif
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state& pcall(int nargs = 0, int nresults = 0, int on_error = 0);
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state& call(int nargs = 0, int nresults = 0);
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state& checkstack(int size);
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state& settop(int index);
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int gettop();
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int size();
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bool empty();
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state& insert(int index);
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state& replace(int index);
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state& remove(int index);
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state& pop(int elements = 1);
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state& pushvalue(int index);
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state& newtable();
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bool newmetatable(const std::string& tname);
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template<typename userdata_t> userdata_t* newuserdata();
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void* newuserdata(size_t nbytes);
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state& gettable(int index = -2);
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state& getfield(const std::string& k, int index = -1);
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state& settable(int index = -3);
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state& setfield(const std::string& k, int index = -2);
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state& getmetatable(const std::string& tname);
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bool getmetatable(int index);
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bool next(int index = -2);
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state& getglobal(const std::string& name);
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state& setglobal(const std::string& name);
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state& loadfile(const std::string& filename);
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state& loadstring(const std::string& s);
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template<typename iterator_t> state& load(iterator_t begin, iterator_t end);
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size_t objlen(int index = -1);
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private:
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lua_State* L;
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bool managed;
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int throw_error(int code);
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};
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// template functions
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/** Push a number onto the stack.
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* @tparam T the numeric type to push (should be automatically determined,
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* if there is no specialization for the desired type, lua_pushnumber() will
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* be used, and may fail)
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* @param number the number to push
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* @returns a reference to this lua::state
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*/
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template<typename T>
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state& state::push(T number) {
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lua_pushnumber(L, number);
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return *this;
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}
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/** Push a light userdatum on to the stack.
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* @tparam T the type of data to push (should be automatically determined)
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* @param p the pointer to push
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* @returns a reference to this lua::state
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*/
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template<typename T>
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state& state::pushlightuserdata(T p) {
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lua_pushlightuserdata(L, p);
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return *this;
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}
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/** Check if the given index is of the given type (defaults to using
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* lua_isnumber()).
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* @tparam T the type to check for (the default, if no specializations
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* match, does lua_isnumber())
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* @param index the index to check
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* @note the default version (used if no specialization is matched) will
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* check if the given value is a number
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* @returns whether the value at the given index is a nil
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*/
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template<typename T>
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bool state::is(int index) {
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return lua_isnumber(L, index);
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}
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/** Get the value at index as the given numeric type.
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* @tparam T they numeric type to static_cast<T>() the numeric value on the
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* stack to
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* @param number where to store the value
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* @param index the index to get
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* @note This function does \em not pop the value from the stack.
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* @todo Instead of throwing an exception here, we may just return an
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* error code.
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* @throws lua::bad_conversion if the value on the stack could not be
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* converted to the indicated type
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* @returns a reference to this lua::state
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*/
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template<typename T>
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state& state::to(T& number, int index) {
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if (lua_isnumber(L, index))
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number = static_cast<T>(lua_tonumber(L, index));
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else
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throw bad_conversion("Cannot convert non 'number' value to number");
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return *this;
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}
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/** Get the value at index as (light) userdata.
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* @tparam T the type of data pointed to (pointer is returned as
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* reinterpret_cast<T>())
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* @param p the pointer to store the value in
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* @param index the index to get
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* @note This function does \em not pop the value from the stack.
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* @todo Instead of throwing an exception here, we may just return an
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* error code.
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* @throws lua::bad_conversion if the value on the stack could not be
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* converted to the indicated type
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* @returns a reference to this lua::state
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*/
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template<typename T>
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state& state::touserdata(T& p, int index) {
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if (lua_isuserdata(L, index))
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p = reinterpret_cast<T>(lua_touserdata(L, index));
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else
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throw bad_conversion("Cannot convert non 'userdata' or 'lightuserdata' value to userdata");
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return *this;
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}
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/** Get the value at index as the given type.
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* @tparam T the type to retrieve the value on the stack as (the default
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* template function uses lua_tonumber(), specializations may cause
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* different behavior)
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* @param default_value this value is returned if the conversion fails
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* @param index the index to get
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* @note This function does \em not pop the value from the stack.
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* @returns the indicated value from the stack or the default value if
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* the conversion fails
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*/
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template<typename T>
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T state::as(T default_value, int index) {
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if (lua_isnumber(L, index))
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return static_cast<T>(lua_tonumber(L, index));
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else
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return default_value;
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}
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/** Get the value at index as the given type.
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* @tparam T the expected type of the value
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* @param index the index to get
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*
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* @note This function does \em not pop the value from the stack.
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* @note The default version of this function uses lua_tonumber() but
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* specializations may cause different behavior.
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*
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* @todo Instead of throwing an exception here, we may just return an
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* error code.
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*
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* @throws lua::bad_conversion if the value on the stack could not be
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* converted to the indicated type
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*
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* This function will return the value on the stack as the given type. If
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* the value is not of the given type <em>no conversion will be
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* performed</em> and lua::bad_conversion will be thrown. There are some
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* exceptions to this rule, for example, numbers will be converted to
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* strings and vice-versa (conversion is only performed if the matching
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* lua_is*() function returns true). The state::to() function should be
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* used to perform automatic conversion.
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*
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* @returns the indicated value as the given type if possible
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*/
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template<typename T>
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T state::as(int index) {
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if (lua_isnumber(L, index))
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return static_cast<T>(lua_tonumber(L, index));
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else
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throw bad_conversion("Cannot convert non 'number' value to number");
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}
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/** Create a new userdatum on the stack.
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* @tparam userdata_t the type of the userdata (will be passed to sizeof())
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*
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* This function creates a new userdatum on the stack the size of
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* userdata_t and return a pointer to it.
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* @returns a pointer to the new userdatum
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*/
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template<typename userdata_t>
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userdata_t* state::newuserdata() {
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return reinterpret_cast<userdata_t*>(lua_newuserdata(L, sizeof(userdata_t)));
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}
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/** Generate a Lua error.
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* @tparam msg_t the type of error message data (should be automatically
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* determined)
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* @param message the error message/value
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* @note This function is used to raise errors from lua::cfunctions.
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* @note This function never returns, instead it throws an exception
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* caught by the intepreter.
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*/
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template<typename msg_t>
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void state::error(msg_t message) {
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push(message);
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lua_error(L);
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}
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/** Load a sequence of data as a Lua chunk.
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* @tparam iterator_t the type of iterator to use (should be automatically
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* determined)
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* @param begin an iterator to the start of the sequence
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* @param end an iterator to the end of the sequence (one past the
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* end)
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*
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* This function takes a sequence of data and attempts to convert it
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* into a Lua chunk. The type of data passed must be able to be
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* converted into an 8-bit char.
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*
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* @note This function should automatically detect if the data is text
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* or binary.
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*
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* @returns a reference to this lua::state
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*/
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template<typename iterator_t>
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state& state::load(iterator_t begin, iterator_t end) {
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// convert the data to characters
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std::vector<char> chunk(begin, end);
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// Here we use the address of the first element of our vector.
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// This works because the data in std::vectors is contiguous.
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throw_error(luaL_loadbuffer(L, &(*chunk.begin()), chunk.size(), NULL));
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return *this;
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}
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// template specializations
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template<> state& state::to(bool& boolean, int index);
|
||||
template<> state& state::to(std::string& string, int index);
|
||||
|
||||
template<> bool state::as(bool default_value, int index);
|
||||
template<> std::string state::as(std::string default_value, int index);
|
||||
template<> bool state::as(int index);
|
||||
template<> std::string state::as(int index);
|
||||
|
||||
template<> bool state::is<nil>(int index);
|
||||
template<> bool state::is<bool>(int index);
|
||||
template<> bool state::is<std::string>(int index);
|
||||
template<> bool state::is<table>(int index);
|
||||
template<> bool state::is<cfunction>(int index);
|
||||
template<> bool state::is<function>(int index);
|
||||
template<> bool state::is<userdata>(int index);
|
||||
template<> bool state::is<lightuserdata>(int index);
|
||||
|
||||
|
||||
// inline functions
|
||||
|
||||
/** Convert a lua::state to a lua_State*.
|
||||
* This operator allows lua::state to behave like a lua_State
|
||||
* pointer.
|
||||
*
|
||||
* @note This should be used as a last result to interoperate with C
|
||||
* code. This may be removed in future versions of Luaxx.
|
||||
*/
|
||||
inline state::operator lua_State*() {
|
||||
return L;
|
||||
}
|
||||
|
||||
/** Throws exceptions for error return codes.
|
||||
* @param code the return code
|
||||
*
|
||||
* This function throws an exception based on the error it was passed.
|
||||
* If it is passed a 0 it will not throw anything.
|
||||
*
|
||||
* @todo In the future this function may check an exception mask
|
||||
* before throwing an error.
|
||||
*
|
||||
* @returns the code it was passed
|
||||
*/
|
||||
inline int state::throw_error(int code) {
|
||||
std::string error;
|
||||
|
||||
// below, we package lua errors into exceptions
|
||||
switch (code) {
|
||||
case 0:
|
||||
break;
|
||||
case LUA_ERRSYNTAX:
|
||||
to(error).pop();
|
||||
throw syntax_error(error.c_str());
|
||||
case LUA_ERRMEM:
|
||||
to(error).pop();
|
||||
throw bad_alloc(error.c_str());
|
||||
case LUA_ERRRUN:
|
||||
to(error).pop();
|
||||
throw runtime_error(error.c_str());
|
||||
case LUA_ERRFILE:
|
||||
to(error).pop();
|
||||
throw file_error(error.c_str());
|
||||
default:
|
||||
to(error).pop();
|
||||
throw exception(error.c_str());
|
||||
}
|
||||
return code;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
#endif
|
||||
@ -0,0 +1,69 @@
|
||||
#include "luamain.h"
|
||||
#include <vector>
|
||||
|
||||
|
||||
lua::glua* lua::glua::ptr=0;
|
||||
lua::glua::glua()
|
||||
{
|
||||
RegBasics(mystate);
|
||||
}
|
||||
lua::state &lua::glua::Get()
|
||||
{
|
||||
if(!glua::ptr)
|
||||
glua::ptr=new glua();
|
||||
return glua::ptr->mystate;
|
||||
}
|
||||
|
||||
|
||||
int lua_Ver_Lua(lua_State *L)
|
||||
{
|
||||
lua::state st(L);
|
||||
st.push(LUA_RELEASE);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static const struct luaL_reg lua_basic_lib [] =
|
||||
{
|
||||
{"getluaver", lua_Ver_Lua},
|
||||
{NULL, NULL} /* sentinel */
|
||||
};
|
||||
void lua::RegBasics(lua::state &L)
|
||||
{
|
||||
luaL_openlibs(L);
|
||||
RegFunctions(L,lua_basic_lib);
|
||||
}
|
||||
|
||||
void lua::RegFunctions(lua::state &L,luaL_reg const*arr)
|
||||
{
|
||||
luaL_reg const *cur=arr;
|
||||
while(cur->name!=NULL)
|
||||
{
|
||||
lua_pushcfunction(L, cur->func);
|
||||
lua_setglobal(L, cur->name);
|
||||
|
||||
cur++;
|
||||
}
|
||||
}
|
||||
void lua::RegFunctionsLocal(lua::state &L,luaL_reg const*arr)
|
||||
{
|
||||
luaL_reg const *cur=arr;
|
||||
while(cur->name!=NULL)
|
||||
{
|
||||
lua_pushcfunction(L, cur->func);
|
||||
//lua_setglobal(L, cur->name);
|
||||
L.setfield(cur->name);
|
||||
|
||||
cur++;
|
||||
}
|
||||
}
|
||||
string lua::DebugDump(lua::state &L)
|
||||
{
|
||||
L.getglobal("debug");
|
||||
L.getfield("traceback");
|
||||
L.call(0,1);
|
||||
string ret=L.as<string>();
|
||||
//cout<<"StackTrace:"<<ret<<endl;
|
||||
L.settop(0);
|
||||
return ret;
|
||||
}
|
||||
@ -0,0 +1,824 @@
|
||||
/* vim: set et sw=3 tw=0 fo=croqlaw cino=t0:
|
||||
*
|
||||
* Luaxx, the C++ Lua wrapper library.
|
||||
* Copyright (c) 2006-2008 Matthew Nicholson
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to
|
||||
* deal in the Software without restriction, including without limitation the
|
||||
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
||||
* sell copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||||
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
||||
* IN THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <luaxx.hpp>
|
||||
#include <iostream>
|
||||
#define LOG std::cout
|
||||
/** @file
|
||||
* Luaxx implementation file.
|
||||
*/
|
||||
|
||||
namespace lua
|
||||
{
|
||||
void StackDump(lua_State *L)
|
||||
{
|
||||
int i;
|
||||
int top = lua_gettop(L);
|
||||
for (i = 1; i <= top; i++) /* repeat for each level */
|
||||
{
|
||||
int t = lua_type(L, i);
|
||||
LOG<<i<<":";
|
||||
switch (t)
|
||||
{
|
||||
|
||||
case LUA_TSTRING: /* strings */
|
||||
LOG<<"str ="<<lua_tostring(L, i)<<"\n";
|
||||
break;
|
||||
|
||||
case LUA_TBOOLEAN: /* booleans */
|
||||
LOG<<"bool="<<(lua_toboolean(L, i) ? "true" : "false")<<"\n";
|
||||
break;
|
||||
|
||||
case LUA_TNUMBER: /* numbers */
|
||||
LOG<<"num ="<<lua_tonumber(L, i)<<"\n";
|
||||
break;
|
||||
case LUA_TTABLE:
|
||||
|
||||
LOG<<lua_typename(L, t);
|
||||
{
|
||||
//LOG<<"PRE TOP:"<< lua_gettop(L)<<"\n";
|
||||
lua_getglobal(L,"PrintTable");
|
||||
//lua_insert(L,-2);
|
||||
lua_pushvalue(L,i);
|
||||
lua_pcall(L,1,0,0);
|
||||
//LOG<<"POST TOP:"<< lua_gettop(L)<<"\n";
|
||||
}
|
||||
|
||||
break;
|
||||
default: /* other values */
|
||||
LOG<<lua_typename(L, t);
|
||||
{
|
||||
//LOG<<"PRE TOP:"<< lua_gettop(L)<<"\n";
|
||||
lua_getglobal(L,"tostring");
|
||||
//lua_insert(L,-2);
|
||||
lua_pushvalue(L,i);
|
||||
lua_pcall(L,1,1,0);
|
||||
LOG<<"=";
|
||||
LOG<<lua_tostring(L,-1)<<"\n";
|
||||
lua_pop(L,1);
|
||||
//LOG<<"POST TOP:"<< lua_gettop(L)<<"\n";
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
LOG<<"\n"; /* end the listing */
|
||||
LOG<<"==============================\n";
|
||||
}
|
||||
#undef LOG
|
||||
/// Construct our lua environment.
|
||||
state::state() : L(luaL_newstate()), managed(true) {
|
||||
if (L == NULL)
|
||||
throw bad_alloc("Error creating lua state");
|
||||
}
|
||||
|
||||
/** Construct our lua environment from an existing lua_State.
|
||||
* @param L the existing state to use.
|
||||
*
|
||||
* This function differs from the normal constructor as it sets a flag
|
||||
* that prevents lua_close() from being called when this class is
|
||||
* destroyed.
|
||||
*/
|
||||
state::state(lua_State* L) :
|
||||
L(L), managed(false) {
|
||||
}
|
||||
state& state::operator = (const state& t)
|
||||
{
|
||||
if(managed)
|
||||
lua_close(L);
|
||||
managed=false;
|
||||
L=t.L;
|
||||
return *this;
|
||||
}
|
||||
/// Destroy our lua environment.
|
||||
state::~state() {
|
||||
if (managed)
|
||||
lua_close(L);
|
||||
}
|
||||
|
||||
/** Push a nil onto the stack.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::push() {
|
||||
lua_pushnil(L);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Push a nil onto the stack.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::push(nil) {
|
||||
lua_pushnil(L);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Push a boolean onto the stack.
|
||||
* @param boolean the value to push
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::push(bool boolean) {
|
||||
lua_pushboolean(L, boolean);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Push a C-style string onto the stack.
|
||||
* @param s the string to push
|
||||
* @param length the length of the string
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::push(const char* s, size_t length) {
|
||||
lua_pushlstring(L, s, length);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Push a C-style string onto the stack.
|
||||
* @param s the string to push
|
||||
* @note This must be a '0' terminated string.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::push(const char* s) {
|
||||
lua_pushstring(L, s);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Push an std::string onto the stack.
|
||||
* @param s the string to push
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::push(const std::string& s) {
|
||||
lua_pushlstring(L, s.c_str(), s.size());
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Push an C function onto the stack.
|
||||
* @param f the function to push
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::push(cfunction f) {
|
||||
lua_pushcfunction(L, f);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Create a new table on to the stack.
|
||||
* @see state::newtable()
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::push(table) {
|
||||
lua_newtable(L);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Push a light userdatum on to the stack.
|
||||
* @param p the pointer to push
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::push(void* p) {
|
||||
lua_pushlightuserdata(L, p);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Get the value at index as a string.
|
||||
* @param default_value this value is returned if the conversion fails
|
||||
* @param index the index to get
|
||||
* @note This function does \em not pop the value from the stack.
|
||||
*
|
||||
* @note lua::state::as(std::string()) will convert the value at the
|
||||
* indicated index to a string <em>on the stack</em>. This can
|
||||
* confuse lua::state::next();
|
||||
*
|
||||
* @returns the indicated value from the stack or the default value if the
|
||||
* conversion fails
|
||||
*/
|
||||
template<>
|
||||
std::string state::as(std::string default_value, int index) {
|
||||
if (lua_isstring(L, index))
|
||||
return std::string(lua_tostring(L, index), lua_strlen(L, index));
|
||||
else
|
||||
return default_value;
|
||||
}
|
||||
|
||||
/** Check an argument of the current function.
|
||||
* @param narg the argument number to check
|
||||
*
|
||||
* This function will throw a lua error if there is no argument at the
|
||||
* given position.
|
||||
*
|
||||
* @note This function is meant to be called from with in a lua::cfunction.
|
||||
* The error throw is internal to the lua interpreter. When compiled as
|
||||
* C++, a C++ exception is thrown, so the stack is properly unwound. This
|
||||
* exception is not meant to be caught.
|
||||
*/
|
||||
state& state::check(int narg) {
|
||||
luaL_checkany(L, narg);
|
||||
return *this;
|
||||
}
|
||||
|
||||
#ifndef lua_Integer_int
|
||||
/** Check an argument of the current function.
|
||||
* @param i the int to hold the returned value
|
||||
* @param narg the argument number to check
|
||||
*
|
||||
* This function checks if the given argument number is an int.
|
||||
*
|
||||
* @note This function is meant to be called from with in a
|
||||
* lua::cfunction. The error throw is internal to the lua intrepeter.
|
||||
* When compiled as C++, a C++ exception is thrown, so the stack is
|
||||
* properly unwound. This exception is not meant to be caught.
|
||||
*/
|
||||
state& state::check(int& i, int narg) {
|
||||
i = luaL_checkint(L, narg);
|
||||
return *this;
|
||||
}
|
||||
#endif
|
||||
|
||||
/** Check an argument of the current function.
|
||||
* @param i the lua::integer (lua_Integer) to hold the returned value
|
||||
* @param narg the argument number to check
|
||||
*
|
||||
* This function checks if the given argument number is an integer.
|
||||
*
|
||||
* @note This is different from lua::check(int(), ...). It returns a
|
||||
* lua::integer (lua_Integer), which may not be an int.
|
||||
*
|
||||
* @note This function is meant to be called from with in a
|
||||
* lua::cfunction. The error throw is internal to the lua intrepeter.
|
||||
* When compiled as C++, a C++ exception is thrown, so the stack is
|
||||
* properly unwound. This exception is not meant to be caught.
|
||||
*/
|
||||
state& state::check(integer& i, int narg) {
|
||||
i = luaL_checkinteger(L, narg);
|
||||
return *this;
|
||||
}
|
||||
|
||||
#ifndef lua_Integer_long
|
||||
/** Check an argument of the current function.
|
||||
* @param l the long to hold the returned value
|
||||
* @param narg the argument number to check
|
||||
*
|
||||
* This function checks if the given argument number is a long.
|
||||
*
|
||||
* @note This function is meant to be called from with in a
|
||||
* lua::cfunction. The error throw is internal to the lua intrepeter.
|
||||
* When compiled as C++, a C++ exception is thrown, so the stack is
|
||||
* properly unwound. This exception is not meant to be caught.
|
||||
*/
|
||||
state& state::check(long& l, int narg) {
|
||||
l = luaL_checklong(L, narg);
|
||||
return *this;
|
||||
}
|
||||
#endif
|
||||
|
||||
/** Check an argument of the current function.
|
||||
* @param s the string to hold the returned value
|
||||
* @param narg the argument number to check
|
||||
*
|
||||
* This function checks if the given argument number is a string.
|
||||
*
|
||||
* @note This function is meant to be called from with in a
|
||||
* lua::cfunction. The error throw is internal to the lua intrepeter.
|
||||
* When compiled as C++, a C++ exception is thrown, so the stack is
|
||||
* properly unwound. This exception is not meant to be caught.
|
||||
*/
|
||||
state& state::check(std::string& s, int narg) {
|
||||
const char* c;
|
||||
size_t l;
|
||||
c = luaL_checklstring(L, narg, &l);
|
||||
|
||||
s.assign(c, l);
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Check an argument of the current function.
|
||||
* @param n the lua::number (lua_Number) to hold the returned value
|
||||
* @param narg the argument number to check
|
||||
*
|
||||
* This function checks if the given argument number is a lua::number
|
||||
* (lua_Number, a double by default).
|
||||
*
|
||||
* @note This function is meant to be called from with in a lua::cfunction.
|
||||
* The error throw is internal to the lua interpreter. When compiled as
|
||||
* C++, a C++ exception is thrown, so the stack is properly unwound. This
|
||||
* exception is not meant to be caught.
|
||||
*/
|
||||
state& state::check(number& n, int narg) {
|
||||
n = luaL_checknumber(L, narg);
|
||||
return *this;
|
||||
}
|
||||
|
||||
#if 0
|
||||
/** [specialization] Generate a Lua error (T = std::string).
|
||||
*/
|
||||
template<>
|
||||
void state::error(const std::string& message) {
|
||||
push(message);
|
||||
lua_error(L);
|
||||
}
|
||||
#endif
|
||||
|
||||
/** Call a lua function.
|
||||
* @param nargs the number of args to pass to the function
|
||||
* @param nresults the number of values to return from the function
|
||||
* @param on_error A stack index where the error handling function is
|
||||
* stored.
|
||||
* @note The error handling function must be pushed in the stack
|
||||
* before the function to be called and its arguments.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::pcall(int nargs, int nresults, int on_error) {
|
||||
throw_error(lua_pcall(L, nargs, nresults, on_error));
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Call a lua function in unprotected mode.
|
||||
* @param nargs the number of args to pass to the function
|
||||
* @param nresults the number of values to return from the function
|
||||
* stored.
|
||||
* @note If there is an error in the call the program will terminate.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::call(int nargs, int nresults) {
|
||||
lua_call(L, nargs, nresults);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Ensure the stack is at least the given size.
|
||||
* @param size the size to use
|
||||
*
|
||||
* If the stack is smaller than the given size, it will grow to the
|
||||
* specified size.
|
||||
*
|
||||
* @exception lua::exception Thrown if the operation fails.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::checkstack(int size) {
|
||||
if (!lua_checkstack(L, size))
|
||||
throw lua::exception("Error growing the stack");
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Set a new index as the top of the stack.
|
||||
* @param index the index to use as the new top
|
||||
* @note If the previous top was higher than the new one, top values
|
||||
* are discarded. Otherwise this function pushs nils on to the stack
|
||||
* to get the proper size.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::settop(int index) {
|
||||
lua_settop(L, index);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Get the number of elements in the stack.
|
||||
* @note This value is also the index of the top element.
|
||||
* @returns the number of elements in the stack
|
||||
*/
|
||||
int state::gettop() {
|
||||
return lua_gettop(L);
|
||||
}
|
||||
|
||||
/** Get the number of elements in the stack.
|
||||
* @note This value is also the index of the top element.
|
||||
* @returns the number of elements in the stack
|
||||
*/
|
||||
int state::size() {
|
||||
return lua_gettop(L);
|
||||
}
|
||||
|
||||
/** Check if the stack is empty.
|
||||
* @returns true if the stack is empty, false otherwise
|
||||
*/
|
||||
bool state::empty() {
|
||||
return !lua_gettop(L);
|
||||
}
|
||||
|
||||
/** Move the top element to the given index.
|
||||
* @param index the index to insert at
|
||||
* @note All elements on top of the given index are shifted up to open
|
||||
* space for this element.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::insert(int index) {
|
||||
lua_insert(L, index);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Replace the given index with the top element.
|
||||
* @param index the index to replae
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::replace(int index) {
|
||||
lua_replace(L, index);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Remove the given index from the stack.
|
||||
* @param index the index to remove
|
||||
* @note Elements are shifted down to fill in the empty spot.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::remove(int index) {
|
||||
lua_remove(L, index);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Remove the given number of elemens from the stack.
|
||||
* @param elements the number of elements to remove
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::pop(int elements) {
|
||||
lua_pop(L, elements);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Push a copy of the element at the given index to the top of the
|
||||
* stack.
|
||||
* @param index the index of the element to copy
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::pushvalue(int index) {
|
||||
lua_pushvalue(L, index);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Create a new table on the stack.
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::newtable() {
|
||||
lua_newtable(L);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Create a new metatable and add it to the registry.
|
||||
* @param tname the name to use for the new metatable in the registry
|
||||
*
|
||||
* This function creates a new metatable and adds it to the registry
|
||||
* with the given key. This function also pushes the new metatable
|
||||
* onto the stack.
|
||||
*
|
||||
* @note Regardless of the return value, the new metatable is always pushed
|
||||
* on to the stack.
|
||||
*
|
||||
* @return true if a new metatable was created, false if the registry
|
||||
* alread has a key with the given name.
|
||||
*/
|
||||
bool state::newmetatable(const std::string& tname) {
|
||||
return luaL_newmetatable(L, tname.c_str());
|
||||
}
|
||||
|
||||
/** Create a new userdatum on the stack.
|
||||
* @param nbytes the size of the new userdatum
|
||||
* @return a pointer to the new userdatum
|
||||
*/
|
||||
void* state::newuserdata(size_t nbytes) {
|
||||
return lua_newuserdata(L, nbytes);
|
||||
}
|
||||
|
||||
/** Get a value from a table on the stack.
|
||||
* @param index the index the table is stored at
|
||||
*
|
||||
* This function gets a value from the table at the given index and
|
||||
* pushes it onto the stack.
|
||||
*
|
||||
* @note You should have already pushed the key used to reference this
|
||||
* value onto the stack before calling this function.
|
||||
*
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::gettable(int index) {
|
||||
lua_gettable(L, index);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Get a value from a table on the stack.
|
||||
* @param k the key
|
||||
* @param index the index the table is stored at
|
||||
*
|
||||
* This function gets a value from the table at the given index and
|
||||
* pushes it onto the stack.
|
||||
*
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::getfield(const std::string& k, int index) {
|
||||
lua_getfield(L, index, k.c_str());
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Set a value in a table.
|
||||
* @param index the index the table is stored at
|
||||
*
|
||||
* This function sets a value in a table stored at the given index.
|
||||
*
|
||||
* @note The key and value to be used should have already been pushed
|
||||
* on the stack in that order.
|
||||
*
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::settable(int index) {
|
||||
lua_settable(L, index);
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Set a field in a table.
|
||||
* @param k the key
|
||||
* @param index the index the table is stored at
|
||||
*
|
||||
* This function sets a value in a table stored at the given index.
|
||||
*
|
||||
* @note The value to be used should be on the top of the stack.
|
||||
*
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::setfield(const std::string& k, int index) {
|
||||
lua_setfield(L, index, k.c_str());
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Get the metatable associated with the given registry entry.
|
||||
* @param tname the name in the registry
|
||||
*
|
||||
* This function gets the metatable associated with the given key in
|
||||
* the registry. The resulting metatable is pushed onto the stack.
|
||||
*
|
||||
* @note This function uses luaL_getmetatable() internally.
|
||||
*
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::getmetatable(const std::string& tname) {
|
||||
luaL_getmetatable(L, tname.c_str());
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Get the metatable of the value at the given index.
|
||||
* @param index the index the value is stored at
|
||||
*
|
||||
* This function pushes on to the stack the metatabe of the value at
|
||||
* the given index.
|
||||
*
|
||||
* @note This function uses lua_getmetatable() internally.
|
||||
*
|
||||
* @returns false if the value at the given index does not have a
|
||||
* metatable or if the index is not valid
|
||||
*/
|
||||
bool state::getmetatable(int index) {
|
||||
return lua_getmetatable(L, index);
|
||||
}
|
||||
|
||||
/** Get the next key value pair from a table on the stack.
|
||||
* @param index the stack index the table is at
|
||||
*
|
||||
* This function pops a key from the stack and pushes the next key
|
||||
* value pair to the stack. The key will be stored at index -2 and
|
||||
* the value will be at index -1. The key is expected to be on the
|
||||
* top of the stack.
|
||||
*
|
||||
* @note While traversing a table, do not call
|
||||
* lua::state::to(std::string()) directly on a key, unless you know
|
||||
* that the key is actually a string. lua::state::to(std::string())
|
||||
* changes the value at the given index; this confuses the next call
|
||||
* to lua::state::next().
|
||||
*
|
||||
* <strong>While Loop Example:</strong>
|
||||
* @code
|
||||
* while(L.next() != 0) {
|
||||
* // do stuff
|
||||
* L.pop();
|
||||
* }
|
||||
* @endcode
|
||||
*
|
||||
* <strong>For Loop Example:</strong>
|
||||
* @code
|
||||
* for(L.push(lua::nil()); L.next(); L.pop()) {
|
||||
* // do stuff
|
||||
* }
|
||||
* @endcode
|
||||
*
|
||||
* @returns true as long as there are remaining items in the table
|
||||
*/
|
||||
bool state::next(int index) {
|
||||
return lua_next(L, index);
|
||||
}
|
||||
|
||||
/** Load a global symbol onto the stack.
|
||||
* @param name the name of the global to load
|
||||
*
|
||||
* This function loads a global symbol onto the stack from the lua
|
||||
* state.
|
||||
*
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::getglobal(const std::string& name) {
|
||||
lua_getglobal(L, name.c_str());
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Set a global symbol.
|
||||
* @param name the name of the global to set
|
||||
*
|
||||
* This function sets/creates a global symbol from the value above it
|
||||
* on the stack.
|
||||
*
|
||||
* @note You should have pushed the value of the symbol onto the stack
|
||||
* before calling this function.
|
||||
*
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::setglobal(const std::string& name) {
|
||||
lua_setglobal(L, name.c_str());
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Load a file as a Lua chunk.
|
||||
* @param filename the name of the file to load
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::loadfile(const std::string& filename) {
|
||||
throw_error(luaL_loadfile(L, filename.c_str()));
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Load a string as a Lua chunk.
|
||||
* @param s the string to load
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
state& state::loadstring(const std::string& s) {
|
||||
throw_error(luaL_loadstring(L, s.c_str()));
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Get the length of a value on the stack.
|
||||
* @param index the index the value is stored at
|
||||
* @returns the length of the indicated value
|
||||
*/
|
||||
size_t state::objlen(int index) {
|
||||
return lua_objlen(L, index);
|
||||
}
|
||||
|
||||
/** Get the value at index as a bool.
|
||||
* @param boolean where to store the value
|
||||
* @param index the index to get
|
||||
* @note This function does \em not pop the value from the stack.
|
||||
* @todo Instead of throwing an exception here, we may just return an
|
||||
* error code.
|
||||
* @throws lua::bad_conversion if the value on the stack could not be
|
||||
* converted to the indicated type
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
template<>
|
||||
state& state::to(bool& boolean, int index) {
|
||||
if (lua_isboolean(L, index))
|
||||
boolean = lua_toboolean(L, index);
|
||||
else
|
||||
throw bad_conversion("Cannot convert non 'boolean' value to bool");
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Get the value at index as a string.
|
||||
* @param string where to store the value
|
||||
* @param index the index to get
|
||||
* @note This function does \em not pop the value from the stack.
|
||||
* @todo Instead of throwing an exception here, we may just return an
|
||||
* error code.
|
||||
*
|
||||
* @note lua::state::to(std::string()) will convert the value at the
|
||||
* indicated index to a string <em>on the stack</em>. This can
|
||||
* confuse lua::state::next();
|
||||
*
|
||||
* @throws lua::bad_conversion if the value on the stack could not be
|
||||
* converted to the indicated type
|
||||
* @returns a reference to this lua::state
|
||||
*/
|
||||
template<>
|
||||
state& state::to(std::string& string, int index) {
|
||||
if (lua_isstring(L, index))
|
||||
string.replace(0, std::string::npos, lua_tostring(L, index), lua_strlen(L, index));
|
||||
else
|
||||
throw bad_conversion("Cannot convert value to string");
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
/** Get the value at index as a bool.
|
||||
* @param default_value this value is returned if the conversion fails
|
||||
* @param index the index to get
|
||||
* @note This function does \em not pop the value from the stack.
|
||||
* @returns the indicated value from the stack or the default value if the
|
||||
* conversion fails
|
||||
*/
|
||||
template<>
|
||||
bool state::as(bool default_value, int index) {
|
||||
if (lua_isboolean(L, index))
|
||||
return lua_toboolean(L, index);
|
||||
else
|
||||
return default_value;
|
||||
}
|
||||
|
||||
/** [specialization] Get the value at index as a bool (T = bool).
|
||||
*/
|
||||
template<>
|
||||
bool state::as(int index) {
|
||||
if (lua_isboolean(L, index))
|
||||
return lua_toboolean(L, index);
|
||||
else
|
||||
throw bad_conversion("Cannot convert non 'boolean' value to bool");
|
||||
}
|
||||
|
||||
/** [specialization] Get the value at index as a string (T = std::string).
|
||||
* @note lua::state::as(std::string()) will convert the value at the
|
||||
* indicated index to a string <em>on the stack</em>. This can confuse
|
||||
* lua::state::next();
|
||||
*/
|
||||
template<>
|
||||
std::string state::as(int index) {
|
||||
if (lua_isstring(L, index))
|
||||
return std::string(lua_tostring(L, index), lua_strlen(L, index));
|
||||
else
|
||||
throw bad_conversion("Cannot convert value to string");
|
||||
}
|
||||
|
||||
/** [specialization] Check if the given index is a nil (T = lua::nil).
|
||||
*/
|
||||
template<>
|
||||
bool state::is<nil>(int index) {
|
||||
return lua_isnil(L, index);
|
||||
}
|
||||
|
||||
/** [specialization] Check if the given index is a boolean (T = bool).
|
||||
*/
|
||||
template<>
|
||||
bool state::is<bool>(int index) {
|
||||
return lua_isboolean(L, index);
|
||||
}
|
||||
|
||||
/** [specialization] Check if the given index is a string (T = std::string).
|
||||
*/
|
||||
template<>
|
||||
bool state::is<std::string>(int index) {
|
||||
return lua_isstring(L, index);
|
||||
}
|
||||
|
||||
/** [specialization] Check if the given index is a table (T = lua::table).
|
||||
*/
|
||||
template<>
|
||||
bool state::is<table>(int index) {
|
||||
return lua_istable(L, index);
|
||||
}
|
||||
|
||||
/** [specialization] Check if the given index is a C function (T =
|
||||
* lua::cfunction).
|
||||
*/
|
||||
template<>
|
||||
bool state::is<cfunction>(int index) {
|
||||
return lua_iscfunction(L, index);
|
||||
}
|
||||
|
||||
/** [specialization] Check if the given index is a function (T =
|
||||
* lua::function).
|
||||
*/
|
||||
template<>
|
||||
bool state::is<function>(int index) {
|
||||
return lua_isfunction(L, index);
|
||||
}
|
||||
|
||||
/** [specialization] Check if the given index is userdata (T =
|
||||
* lua::userdata).
|
||||
*/
|
||||
template<>
|
||||
bool state::is<userdata>(int index) {
|
||||
return lua_isuserdata(L, index);
|
||||
}
|
||||
|
||||
/** [specialization] Check if the given index is light userdata (T =
|
||||
* lua::lightuserdata).
|
||||
*/
|
||||
template<>
|
||||
bool state::is<lightuserdata>(int index) {
|
||||
return lua_islightuserdata(L, index);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue