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new function 'luaL_setmetatable'

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This commit is contained in:
Roberto Ierusalimschy 2010-11-10 16:05:36 -02:00
parent e885b91326
commit c97aa9485c
4 changed files with 13 additions and 8 deletions
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8
lauxlib.c
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@ -1,5 +1,5 @@
/*
** $Id: lauxlib.c,v 1.225 2010/11/09 11:04:15 roberto Exp roberto $
** $Id: lauxlib.c,v 1.226 2010/11/10 17:38:10 roberto Exp roberto $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
@ -224,6 +224,12 @@ LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
}
LUALIB_API void luaL_setmetatable (lua_State *L, const char *tname) {
luaL_getmetatable(L, tname);
lua_setmetatable(L, -2);
}
LUALIB_API void *luaL_testudata (lua_State *L, int ud, const char *tname) {
void *p = lua_touserdata(L, ud);
if (p != NULL) { /* value is a userdata? */

3
lauxlib.h
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@ -1,5 +1,5 @@
/*
** $Id: lauxlib.h,v 1.109 2010/10/25 20:31:11 roberto Exp roberto $
** $Id: lauxlib.h,v 1.110 2010/11/10 17:38:10 roberto Exp roberto $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
@ -52,6 +52,7 @@ LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
LUALIB_API void (luaL_checkany) (lua_State *L, int narg);
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_testudata) (lua_State *L, int ud, const char *tname);
LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);

5
liolib.c
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@ -1,5 +1,5 @@
/*
** $Id: liolib.c,v 2.93 2010/11/08 17:27:22 roberto Exp roberto $
** $Id: liolib.c,v 2.94 2010/11/09 16:57:49 roberto Exp roberto $
** Standard I/O (and system) library
** See Copyright Notice in lua.h
*/
@ -114,8 +114,7 @@ static FILE *tofile (lua_State *L) {
static FILE **newprefile (lua_State *L) {
FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));
*pf = NULL; /* file handle is currently `closed' */
luaL_getmetatable(L, LUA_FILEHANDLE);
lua_setmetatable(L, -2);
luaL_setmetatable(L, LUA_FILEHANDLE);
return pf;
}

5
loadlib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: loadlib.c,v 1.91 2010/09/07 19:21:39 roberto Exp roberto $
** $Id: loadlib.c,v 1.92 2010/10/29 14:35:09 roberto Exp roberto $
** Dynamic library loader for Lua
** See Copyright Notice in lua.h
**
@ -239,8 +239,7 @@ static void **ll_register (lua_State *L, const char *path) {
lua_pop(L, 1); /* remove result from gettable */
plib = (void **)lua_newuserdata(L, sizeof(const void *));
*plib = NULL;
luaL_getmetatable(L, "_LOADLIB");
lua_setmetatable(L, -2);
luaL_setmetatable(L, "_LOADLIB");
lua_pushfstring(L, "%s%s", LIBPREFIX, path);
lua_pushvalue(L, -2);
lua_settable(L, LUA_REGISTRYINDEX);