Filesystem module

Implements a handful of filesystem-related functions (e.g. chdir, mkdir)
in C++ and Lua.

library/CMakeLists.txt

@@ -127,6 +127,7 @@ include/modules/Vermin.h
 include/modules/World.h
 include/modules/Graphic.h
 include/modules/Once.h
+include/modules/Filesystem.h
 )
 
 SET( MODULE_SOURCES
@@ -152,6 +153,7 @@ modules/World.cpp
 modules/Graphic.cpp
 modules/Windows.cpp
 modules/Once.cpp
+modules/Filesystem.cpp
 )
 
 IF(WIN32)

library/LuaApi.cpp

@@ -52,6 +52,7 @@ distribution.
 #include "modules/Buildings.h"
 #include "modules/Constructions.h"
 #include "modules/Random.h"
+#include "modules/Filesystem.h"
 
 #include "LuaWrapper.h"
 #include "LuaTools.h"
@@ -1923,6 +1924,20 @@ static const luaL_Reg dfhack_screen_funcs[] = {
     { NULL, NULL }
 };
 
+/***** Filesystem module *****/
+
+static const LuaWrapper::FunctionReg dfhack_filesystem_module[] = {
+    WRAPM(Filesystem, getcwd),
+    WRAPM(Filesystem, chdir),
+    WRAPM(Filesystem, mkdir),
+    WRAPM(Filesystem, rmdir),
+    WRAPM(Filesystem, exists),
+    WRAPM(Filesystem, isfile),
+    WRAPM(Filesystem, isdir),
+    {NULL, NULL}
+};
+
+
 /***** Internal module *****/
 
 static void *checkaddr(lua_State *L, int idx, bool allow_null = false)
@@ -2265,5 +2280,6 @@ void OpenDFHackApi(lua_State *state)
     OpenModule(state, "buildings", dfhack_buildings_module, dfhack_buildings_funcs);
     OpenModule(state, "constructions", dfhack_constructions_module);
     OpenModule(state, "screen", dfhack_screen_module, dfhack_screen_funcs);
+    OpenModule(state, "filesystem", dfhack_filesystem_module);
     OpenModule(state, "internal", dfhack_internal_module, dfhack_internal_funcs);
 }

library/include/modules/Filesystem.h

@@ -0,0 +1,194 @@
+/*
+https://github.com/peterix/dfhack
+Copyright (c) 2009-2012 Petr Mrázek (peterix@gmail.com)
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any
+damages arising from the use of this software.
+
+Permission is granted to anyone to use this software for any
+purpose, including commercial applications, and to alter it and
+redistribute it freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must
+not claim that you wrote the original software. If you use this
+software in a product, an acknowledgment in the product documentation
+would be appreciated but is not required.
+
+2. Altered source versions must be plainly marked as such, and
+must not be misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source
+distribution.
+*/
+/* Based on luafilesystem
+Copyright © 2003-2014 Kepler Project.
+
+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.
+*/
+
+#pragma once
+#include "Export.h"
+
+#ifndef _WIN32
+#ifndef _AIX
+#define _FILE_OFFSET_BITS 64 /* Linux, Solaris and HP-UX */
+#else
+#define _LARGE_FILES 1 /* AIX */
+#endif
+#endif
+
+#ifndef _LARGEFILE64_SOURCE
+#define _LARGEFILE64_SOURCE
+#endif
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/stat.h>
+
+#ifdef _WIN32
+#include <direct.h>
+#include <windows.h>
+#include <io.h>
+#include <sys/locking.h>
+#ifdef __BORLANDC__
+ #include <utime.h>
+#else
+ #include <sys/utime.h>
+#endif
+#include <fcntl.h>
+#else
+#include <unistd.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <utime.h>
+#endif
+
+#define LFS_VERSION "1.6.2"
+#define LFS_LIBNAME "lfs"
+
+#if LUA_VERSION_NUM < 502
+#  define luaL_newlib(L,l) (lua_newtable(L), luaL_register(L,NULL,l))
+#endif
+
+/* Define 'strerror' for systems that do not implement it */
+#ifdef NO_STRERROR
+#define strerror(_)     "System unable to describe the error"
+#endif
+
+/* Define 'getcwd' for systems that do not implement it */
+#ifdef NO_GETCWD
+#define getcwd(p,s)     NULL
+#define getcwd_error    "Function 'getcwd' not provided by system"
+#else
+#define getcwd_error    strerror(errno)
+  #ifdef _WIN32
+	 /* MAX_PATH seems to be 260. Seems kind of small. Is there a better one? */
+    #define LFS_MAXPATHLEN MAX_PATH
+  #else
+	/* For MAXPATHLEN: */
+    #include <sys/param.h>
+    #define LFS_MAXPATHLEN MAXPATHLEN
+  #endif
+#endif
+
+typedef struct dir_data {
+        int  closed;
+#ifdef _WIN32
+        intptr_t hFile;
+        char pattern[MAX_PATH+1];
+#else
+        DIR *dir;
+#endif
+} dir_data;
+
+#ifdef _WIN32
+ #ifdef __BORLANDC__
+  #define lfs_setmode(L,file,m)   ((void)L, setmode(_fileno(file), m))
+  #define STAT_STRUCT struct stati64
+ #else
+  #define lfs_setmode(L,file,m)   ((void)L, _setmode(_fileno(file), m))
+  #define STAT_STRUCT struct _stati64
+ #endif
+#define STAT_FUNC _stati64
+#define LSTAT_FUNC STAT_FUNC
+#else
+#define _O_TEXT               0
+#define _O_BINARY             0
+#define lfs_setmode(L,file,m)   ((void)L, (void)file, (void)m, 0)
+#define STAT_STRUCT struct stat
+#define STAT_FUNC stat
+#define LSTAT_FUNC lstat
+#endif
+
+#ifdef _WIN32
+ #ifndef S_ISDIR
+   #define S_ISDIR(mode)  (mode&_S_IFDIR)
+ #endif
+ #ifndef S_ISREG
+   #define S_ISREG(mode)  (mode&_S_IFREG)
+ #endif
+ #ifndef S_ISLNK
+   #define S_ISLNK(mode)  (0)
+ #endif
+ #ifndef S_ISSOCK
+   #define S_ISSOCK(mode)  (0)
+ #endif
+ #ifndef S_ISFIFO
+   #define S_ISFIFO(mode)  (0)
+ #endif
+ #ifndef S_ISCHR
+   #define S_ISCHR(mode)  (mode&_S_IFCHR)
+ #endif
+ #ifndef S_ISBLK
+   #define S_ISBLK(mode)  (0)
+ #endif
+#endif
+
+enum _filetype {
+    FILETYPE_NONE = -2,
+    FILETYPE_UNKNOWN = -1,
+    FILETYPE_FILE = 1,
+    FILETYPE_DIRECTORY,
+    FILETYPE_LINK,
+    FILETYPE_SOCKET,
+    FILETYPE_NAMEDPIPE,
+    FILETYPE_CHAR_DEVICE,
+    FILETYPE_BLOCK_DEVICE
+};
+
+namespace DFHack {
+    namespace Filesystem {
+        DFHACK_EXPORT bool chdir (std::string path);
+        DFHACK_EXPORT char * getcwd ();
+        DFHACK_EXPORT bool mkdir (std::string path);
+        DFHACK_EXPORT bool rmdir (std::string path);
+        DFHACK_EXPORT bool stat (std::string path, STAT_STRUCT &info);
+        DFHACK_EXPORT bool exists (std::string path);
+        DFHACK_EXPORT _filetype filetype (std::string path);
+        DFHACK_EXPORT bool isfile (std::string path);
+        DFHACK_EXPORT bool isdir (std::string path);
+    }
+}

library/modules/Filesystem.cpp

@@ -0,0 +1,141 @@
+/*
+https://github.com/peterix/dfhack
+Copyright (c) 2009-2012 Petr Mrázek (peterix@gmail.com)
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any
+damages arising from the use of this software.
+
+Permission is granted to anyone to use this software for any
+purpose, including commercial applications, and to alter it and
+redistribute it freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must
+not claim that you wrote the original software. If you use this
+software in a product, an acknowledgment in the product documentation
+would be appreciated but is not required.
+
+2. Altered source versions must be plainly marked as such, and
+must not be misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source
+distribution.
+*/
+/* Based on luafilesystem
+Copyright © 2003-2014 Kepler Project.
+
+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 <string>
+
+#include "modules/Filesystem.h"
+
+bool DFHack::Filesystem::chdir (std::string path)
+{
+    return !(bool)::chdir(path.c_str());
+}
+
+char * DFHack::Filesystem::getcwd ()
+{
+    char *path;
+    char buf[LFS_MAXPATHLEN];
+    if ((path = ::getcwd(buf, LFS_MAXPATHLEN)) == NULL)
+        return NULL;
+    else
+        return path;
+}
+
+bool DFHack::Filesystem::mkdir (std::string path)
+{
+    int fail;
+#ifdef _WIN32
+    fail = ::_mkdir(path.c_str());
+#else
+    fail = ::mkdir(path.c_str(), S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP |
+                   S_IWGRP | S_IXGRP | S_IROTH | S_IXOTH);
+#endif
+    return !(bool)fail;
+}
+
+bool DFHack::Filesystem::rmdir (std::string path)
+{
+    int fail;
+#ifdef _WIN32
+    fail = ::_rmdir(path.c_str());
+#else
+    fail = ::rmdir(path.c_str());
+#endif
+    return !(bool)fail;
+}
+
+#ifdef _WIN32
+_filetype *mode2type (unsigned short mode) {
+#else
+_filetype mode2type (mode_t mode) {
+#endif
+    if (S_ISREG(mode))
+        return FILETYPE_FILE;
+    else if (S_ISDIR(mode))
+        return FILETYPE_DIRECTORY;
+    else if (S_ISLNK(mode))
+        return FILETYPE_LINK;
+    else if (S_ISSOCK(mode))
+        return FILETYPE_SOCKET;
+    else if (S_ISFIFO(mode))
+        return FILETYPE_NAMEDPIPE;
+    else if (S_ISCHR(mode))
+        return FILETYPE_CHAR_DEVICE;
+    else if (S_ISBLK(mode))
+        return FILETYPE_BLOCK_DEVICE;
+    else
+        return FILETYPE_UNKNOWN;
+}
+
+bool DFHack::Filesystem::stat (std::string path, STAT_STRUCT &info)
+{
+    return !(bool)(STAT_FUNC(path.c_str(), &info));
+}
+
+bool DFHack::Filesystem::exists (std::string path)
+{
+    STAT_STRUCT info;
+    return (bool)DFHack::Filesystem::stat(path.c_str(), info);
+}
+
+#include <iostream>
+_filetype DFHack::Filesystem::filetype (std::string path)
+{
+    STAT_STRUCT info;
+    DFHack::Filesystem::stat(path, info);
+    std::cout << info.st_mode << std::endl;
+    return mode2type(info.st_mode);
+}
+
+bool DFHack::Filesystem::isfile (std::string path)
+{
+    return DFHack::Filesystem::filetype(path) == FILETYPE_FILE;
+}
+
+bool DFHack::Filesystem::isdir (std::string path)
+{
+    return DFHack::Filesystem::filetype(path) == FILETYPE_DIRECTORY;
+}