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Fixed potential NULL pointer and leak when setting node metadata

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MetaDucky 2013-11-20 22:11:57 +01:00 • committed by kwolekr
parent 747bc40840
commit 5be786c804
5 changed files with 56 additions and 19 deletions
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18
src/script/lua_api/l_nodemeta.cpp
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@ -42,10 +42,12 @@ NodeMetaRef* NodeMetaRef::checkobject(lua_State *L, int narg)
NodeMetadata* NodeMetaRef::getmeta(NodeMetaRef *ref, bool auto_create)
{
NodeMetadata *meta = ref->m_env->getMap().getNodeMetadata(ref->m_p);
if(meta == NULL && auto_create)
{
if(meta == NULL && auto_create) {
meta = new NodeMetadata(ref->m_env->getGameDef());
ref->m_env->getMap().setNodeMetadata(ref->m_p, meta);
if(!ref->m_env->getMap().setNodeMetadata(ref->m_p, meta)) {
delete meta;
return NULL;
}
}
return meta;
}
@ -227,17 +229,21 @@ int NodeMetaRef::l_from_table(lua_State *L)
NodeMetaRef *ref = checkobject(L, 1);
int base = 2;
// clear old metadata first
ref->m_env->getMap().removeNodeMetadata(ref->m_p);
if(lua_isnil(L, base)){
// No metadata
ref->m_env->getMap().removeNodeMetadata(ref->m_p);
lua_pushboolean(L, true);
return 1;
}
// Has metadata; clear old one first
ref->m_env->getMap().removeNodeMetadata(ref->m_p);
// Create new metadata
NodeMetadata *meta = getmeta(ref, true);
if(meta == NULL){
lua_pushboolean(L, false);
return 1;
}
// Set fields
lua_getfield(L, base, "fields");
int fieldstable = lua_gettop(L);