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Add lua_lightuserdatatag

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This commit is contained in:
Petri Häkkinen 2023-11-02 11:05:44 +02:00
parent 661734412f
commit 002aaf8dcf
3 changed files with 11 additions and 0 deletions
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1
VM/include/lua.h
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@ -163,6 +163,7 @@ LUA_API void* lua_tolightuserdatatagged(lua_State* L, int idx, int tag);
LUA_API void* lua_touserdata(lua_State* L, int idx);
LUA_API void* lua_touserdatatagged(lua_State* L, int idx, int tag);
LUA_API int lua_userdatatag(lua_State* L, int idx);
LUA_API int lua_lightuserdatatag(lua_State* L, int idx);
LUA_API lua_State* lua_tothread(lua_State* L, int idx);
LUA_API void* lua_tobuffer(lua_State* L, int idx, size_t* len);
LUA_API const void* lua_topointer(lua_State* L, int idx);

8
VM/src/lapi.cpp
View file

@ -536,6 +536,14 @@ int lua_userdatatag(lua_State* L, int idx)
return -1;
}
int lua_lightuserdatatag(lua_State* L, int idx)
{
StkId o = index2addr(L, idx);
if (ttislightuserdata(o))
return o->extra[0];
return -1;
}
lua_State* lua_tothread(lua_State* L, int idx)
{
StkId o = index2addr(L, idx);

2
tests/Conformance.test.cpp
View file

@ -1675,10 +1675,12 @@ TEST_CASE("LightuserdataApi")
void* value = (void*)0x12345678;
lua_pushlightuserdata(L, value);
CHECK(lua_lightuserdatatag(L, -1) == 0);
CHECK(lua_tolightuserdatatagged(L, -1, 0) == value);
CHECK(lua_tolightuserdatatagged(L, -1, 1) == nullptr);
lua_pushlightuserdatatagged(L, value, 1);
CHECK(lua_lightuserdatatag(L, -1) == 1);
CHECK(lua_tolightuserdatatagged(L, -1, 0) == nullptr);
CHECK(lua_tolightuserdatatagged(L, -1, 1) == value);