Hi hackers,
Is it possible to create and use a userdata value, this way?
typedef struct MyItem {
int size;
} MyItem;
typedef struct MyValue {
const char * name;
MyItem * item;
} MyValue;
static int lua_myvalue_new(lua_State *L) {
MyValue * value;
const char * name;
size_t l;
int n;
name = luaL_checklstring(L, 1, &l);
if (name == NULL) {
return 0;
}
n = luaL_checkinteger(L, 2);
luaL_argcheck(L, n >= 1, 2, "invalid size");
value = (MyValue *) lua_newuserdata(L, sizeof(MyValue));
if (value == NULL) {
return 0;
}
value->name = name;
luaL_getmetatable(L, MYVALUE_REGISTRY);
lua_setmetatable(L, -2);
value->item = (MyItem *) lua_newuserdata(L, sizeof(MyItem));
if (value->item == NULL) {
return 0;
}
value->item->size = n;
luaL_getmetatable(L, UIMYITEM_REGISTRY);
lua_setmetatable(L, -2);
return 1; /* Must return value (MyValue) */
}
Howto return to Lua MyValue struct (userdata)?
MyItem needs to be allocated by malloc rather than
lua_newuserdata?
best regards,
Ranier Vilela
