Add love.filesystem.getLastModified (issue #163)

src/modules/filesystem/physfs/Filesystem.cpp

@@ -557,6 +557,20 @@ namespace physfs
 		}
 	}
 
+	int Filesystem::getLastModified(lua_State * L)
+	{
+		const char * filename = luaL_checkstring(L, 1);
+		int64_t time = PHYSFS_getLastModTime(filename);
+		if (time == -1)
+		{
+			lua_pushnil(L);
+			lua_pushstring(L, "Could not determine file modification date.");
+			return 2;
+		}
+		lua_pushnumber(L, time);
+		return 1;
+	}
+
 } // physfs
 } // filesystem
 } // love

src/modules/filesystem/physfs/Filesystem.h

@@ -278,6 +278,8 @@ namespace physfs
 		**/
 		int load(lua_State * L);
 
+		int getLastModified(lua_State * L);
+
 	}; // Filesystem
 
 } // physfs

src/modules/filesystem/physfs/wrap_Filesystem.cpp

@@ -221,6 +221,11 @@ namespace physfs
 		return instance->load(L);
 	}
 
+	int w_getLastModified(lua_State * L)
+	{
+		return instance->getLastModified(L);
+	}
+
 	int loader(lua_State * L)
 	{
 		const char * filename = lua_tostring(L, -1);
@@ -297,6 +302,7 @@ namespace physfs
 		{ "enumerate",  w_enumerate },
 		{ "lines",  w_lines },
 		{ "load",  w_load },
+		{ "getLastModified", w_getLastModified },
 		{ "newFileData", w_newFileData },
 		{ 0, 0 }
 	};

src/modules/filesystem/physfs/wrap_Filesystem.h

@@ -57,6 +57,7 @@ namespace physfs
 	int w_enumerate(lua_State * L);
 	int w_lines(lua_State * L);
 	int w_load(lua_State * L);
+	int w_getLastModified(lua_State * L);
 	int loader(lua_State * L);
 	extern "C" LOVE_EXPORT int luaopen_love_filesystem(lua_State * L);