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userdata can have multiple user values

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This commit is contained in:
Roberto Ierusalimschy
2018-02-20 13:52:50 -03:00
parent 1afd5a152d
commit ca6fe7449a
8 changed files with 122 additions and 81 deletions
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13
ldblib.c
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@@ -1,5 +1,5 @@
/*
** $Id: ldblib.c,v 1.151 2015/11/23 11:29:43 roberto Exp roberto $
** $Id: ldblib.c,v 1.152 2018/02/17 19:29:29 roberto Exp roberto $
** Interface from Lua to its debug API
** See Copyright Notice in lua.h
*/
@@ -64,19 +64,24 @@ static int db_setmetatable (lua_State *L) {
static int db_getuservalue (lua_State *L) {
int n = luaL_optinteger(L, 2, 1);
if (lua_type(L, 1) != LUA_TUSERDATA)
lua_pushnil(L);
else
lua_getuservalue(L, 1);
else if (lua_getiuservalue(L, 1, n) != LUA_TNONE) {
lua_pushboolean(L, 1);
return 2;
}
return 1;
}
static int db_setuservalue (lua_State *L) {
int n = luaL_optinteger(L, 3, 1);
luaL_checktype(L, 1, LUA_TUSERDATA);
luaL_checkany(L, 2);
lua_settop(L, 2);
lua_setuservalue(L, 1);
if (!lua_setiuservalue(L, 1, n))
lua_pushnil(L);
return 1;
}