diff options
Diffstat (limited to '3rdparty/lua/src/modules/w32resembed.c')
| -rw-r--r-- | 3rdparty/lua/src/modules/w32resembed.c | 118 |
1 files changed, 77 insertions, 41 deletions
diff --git a/3rdparty/lua/src/modules/w32resembed.c b/3rdparty/lua/src/modules/w32resembed.c index 783e2c4..a854717 100644 --- a/3rdparty/lua/src/modules/w32resembed.c +++ b/3rdparty/lua/src/modules/w32resembed.c @@ -16,11 +16,14 @@ #include <lua.h> #include "w32resembed.h" -static int luaC_registerPreloader_(lua_State* L, const int winresidx, LPCTSTR lpszName) +/* this function expects a name at the top of the stack and the winres table next */ +static int luaC_registerPreloader_(lua_State* L) { const int oldTop = lua_gettop(L); - UNREFERENCED_PARAMETER(winresidx); - // Expects the winres table at -1 + /* + [-2] winres + [-1] name:lower() + */ lua_getfield(L, LUA_GLOBALSINDEX, "package"); if(!lua_istable(L, -1)) { @@ -28,6 +31,11 @@ static int luaC_registerPreloader_(lua_State* L, const int winresidx, LPCTSTR lp lua_pushfstring(L, "Not a table at index %i. Expected '%s' table here.", -1, "package"); return FALSE; } + /* + [-3] winres + [-2] name:lower() + [-1] package + */ lua_getfield(L, -1, "preload"); if(!lua_istable(L, -1)) { @@ -35,19 +43,29 @@ static int luaC_registerPreloader_(lua_State* L, const int winresidx, LPCTSTR lp lua_pushfstring(L, "Not a table at index %i. Expected '%s.%s' table here.", -1, "package", "preload"); return FALSE; } - lua_pushtstring(L, lpszName); - lua_getfield(L, -4, W32RES_LOADER); // get registered C function + /* + [-4] winres + [-3] name:lower() + [-2] package + [-1] package.preload + */ + lua_pushvalue(L, -3); + lua_getfield(L, -5, W32RES_LOADER); // get registered C function if(!lua_isfunction(L, -1)) { lua_settop(L, oldTop); lua_pushfstring(L, "Not a C function when fetching field '%s.%s'.", W32RES_MODNAME, W32RES_LOADER); return 1; } - lua_rawset(L, -3); // package.preload[lpszName] = winres.c_loader - // We checked the parameters already - lua_pushtstring_lowercase(L, lpszName); // lpszName = string:lower(lpszName) - lua_getfield(L, -4, W32RES_LOADER); - lua_rawset(L, -3); // package.preload[lpszName] = winres.c_loader + /* + [-6] winres + [-5] name:lower() + [-4] package + [-3] package.preload [t] + [-2] name:lower() [k] + [-1] winres.c_loader [v] + */ + lua_rawset(L, -3); /* t[k] = v */ lua_settop(L, oldTop); return 0; } @@ -58,31 +76,45 @@ static BOOL CALLBACK enumLuaScriptsLanguageCallback(HANDLE hModule, LPCTSTR lpsz UNREFERENCED_PARAMETER(lpszName); if((0 == lstrcmp(RT_LUASCRIPT,lpszType)) && (LANG_NEUTRAL == PRIMARYLANGID(wIDLanguage))) { - const int winresidx = -1; - // Expecting the winres table at the top of the stack here + const int stktop = lua_gettop(L); + const int winresidx = -2; + LPCSTR lpszNameLower = NULL; + lua_pushtstring_lowercase(L, lpszName); /* name:lower() */ + lpszNameLower = lua_tostring(L, -1); + if (!lpszNameLower) + { + lua_pushstring(L, "Could not convert lowercase name to string."); + return FALSE; + } + /* Expecting the winres table at index winresidx here */ if(!lua_istable(L, winresidx)) { lua_pushfstring(L, "Not a table at index %i. Expected '%s' table here.", winresidx, W32RES_MODNAME); return FALSE; } - // Now register the preloader - if(luaC_registerPreloader_(L, winresidx, lpszName)) + /* Now register the preloader */ + if(luaC_registerPreloader_(L)) { - // we expect a string on the stack here ... don't do anything additional + /* we expect a string on the stack here ... don't do anything additional */ return FALSE; } - lua_getfield(L, -1, W32RES_SCRIPTS); + lua_getfield(L, winresidx, W32RES_SCRIPTS); if(!lua_istable(L, -1)) { - lua_pushfstring(L, "Not a table at index %i. Expected '%s.%s' table here.", winresidx, W32RES_MODNAME, W32RES_SCRIPTS); + lua_pushfstring(L, "Not a table at index %i. Expected '%s.%s' table here.", -1, W32RES_MODNAME, W32RES_SCRIPTS); return FALSE; } - // winres.scripts at top of stack - lua_pushtstring(L, lpszName); + lua_pushvalue(L, -2); lua_pushtstring(L, lpszType); - lua_rawset(L, -3); // winres.scripts[lpszName] = lpszType - // now pop one ... (winres.scripts) - lua_pop(L, 1); + /* + [-5] winres + [-4] name:lower() + [-3] winres.scripts [t] + [-2] name:lower() [k] + [-1] type [v] + */ + lua_rawset(L, -3); /* t[k] = v */ + lua_settop(L, stktop); } return TRUE; } @@ -91,10 +123,10 @@ static BOOL CALLBACK enumLuaScriptsNameCallback(HANDLE hModule, LPCTSTR lpszType { lua_State* L = (lua_State*)lParam; UNREFERENCED_PARAMETER(hModule); - // First string table entry that we encounter will be grabbed + /* First string table entry that we encounter will be grabbed */ if(0 == lstrcmp(RT_LUASCRIPT,lpszType)) { - // Now enumerate the languages of this entry ... + /* Now enumerate the languages of this entry ... */ EnumResourceLanguages((HMODULE)hModule, lpszType, lpszName, (ENUMRESLANGPROC)enumLuaScriptsLanguageCallback, (LONG_PTR)L); } return TRUE; @@ -140,14 +172,14 @@ static int luaC_winres_loader_(lua_State* L) LPCTSTR resName; LPCSTR chunkName; - // Expecting char string here (used as chunk name) + /* Expecting char string here (used as chunk name) */ chunkName = lua_checkstring(L, 1); - // Take a copy on the stack + /* Take a copy on the stack */ lua_pushstring(L, chunkName); - // Converts the copy to a wchar_t string + /* Converts the copy to a wchar_t string */ resName = lua_checktstring(L, 2); - // Get pointer to script contents and size of script from current module + /* Get pointer to script contents and size of script from current module */ if( !getResourcePointer(getMyModuleHandle(), resName, RT_LUASCRIPT, ((LPVOID*)&scriptBuf), &dwScriptLen) || !dwScriptLen @@ -157,21 +189,21 @@ static int luaC_winres_loader_(lua_State* L) return 0; } scriptLen = (size_t)dwScriptLen; - // Skip the UTF-8 BOM, if any + /* Skip the UTF-8 BOM, if any */ if((scriptLen > sizeof(utf8bom)) && 0 == memcmp(utf8bom, scriptBuf, sizeof(utf8bom))) { scriptBuf += sizeof(utf8bom); scriptLen -= sizeof(utf8bom); dwScriptLen -= sizeof(utf8bom); } - // Load the script into the Lua state + /* Load the script into the Lua state */ if(0 != (ret = luaL_loadbuffer(L, scriptBuf, scriptLen, chunkName))) { luaL_error(L, "Could not load Lua chunk from resource (%d): %s", ret, lua_tostring(L, -1)); return 0; } - // the loaded script is at the top of the stack - lua_remove(L, 2); // remove the chunk name now + /* the loaded script is at the top of the stack */ + lua_remove(L, 2); /* remove the chunk name now */ lua_pushtstring(L, resName); if(0 != (ret = lua_pcall(L, 1, LUA_MULTRET, 0))) { @@ -180,28 +212,32 @@ static int luaC_winres_loader_(lua_State* L) return ret; } +/* + this function leaves the winres table at the top of the stack + if it fails, it returns 1 and leaves an addition string value on the stack +*/ int w32res_enumerateEmbeddedLuaScripts(lua_State* L) { const luaL_Reg winres_funcs[] = { {W32RES_LOADER, luaC_winres_loader_}, - {NULL, NULL} + {NULL, NULL}, }; luaL_register(L, W32RES_MODNAME, winres_funcs); - // winres table at top of stack - // Name for the contained table + /* winres table at top of stack */ + /* Name for the contained table */ lua_pushstring(L, W32RES_SCRIPTS); - // winres.scripts (later) + /* winres.scripts (later) */ lua_newtable(L); - // Assign the table as winres.scripts + /* Assign the table as winres.scripts */ lua_rawset(L, -3); - // Enumerate the resource names of type RT_LUASCRIPT in the current module - // The callback functions add the names of resources to the table at the top of the stack + /* Enumerate the resource names of type RT_LUASCRIPT in the current module */ + /* The callback functions add the names of resources to the table at the top of the stack */ (void)EnumResourceNames(getMyModuleHandle(), RT_LUASCRIPT, (ENUMRESNAMEPROC)enumLuaScriptsNameCallback, (LONG_PTR)L); if(lua_isstring(L, -1)) { - // Leave error message at top of stack + /* Leave error message at top of stack */ return 1; } - // leave the winres table on the stack + /* leave the winres table on the stack */ return 0; } |