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#include <lua.h>
#include <lauxlib.h>
#if LUA_VERSION_NUM == 501
void luaL_setfuncs(lua_State *L, const luaL_Reg *l, int nup) {
luaL_checkstack(L, nup+1, "too many upvalues");
for (; l->name != NULL; l++) { /* fill the table with given functions */
int i;
lua_pushstring(L, l->name);
for (i = 0; i < nup; i++) /* copy upvalues to the top */
lua_pushvalue(L, -(nup+1));
lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */
lua_settable(L, -(nup + 3));
}
lua_pop(L, nup); /* remove upvalues */
}
void *luaL_testudata(lua_State *L, int ud, const char *tname) {
void *p = lua_touserdata(L, ud);
if (p != NULL) { /* Check for userdata */
if (lua_getmetatable(L, ud)) { /* Does it have a metatable? */
lua_getfield(L, LUA_REGISTRYINDEX, tname); /* Get metatable we're looking for */
if (lua_rawequal(L, -1, -2)) { /* Compare metatables */
lua_pop(L, 2); /* Remove metatables from stack */
return p;
}
lua_pop(L, 2); /* Remove metatables from stack */
}
}
return NULL; /* Return NULL if check fails */
}
#endif
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