/* Class index function * If the object is a userdata (ie, an object), it searches the field in * the alternative table stored in the corresponding "ubox" table. */ static int class_index_event (lua_State* L) { int t = lua_type(L,1); if (t == LUA_TUSERDATA) { /* Access alternative table */ #ifdef LUA_VERSION_NUM /* new macro on version 5.1 */ lua_getfenv(L,1); if (!lua_rawequal(L, -1, TOLUA_NOPEER)) { lua_pushvalue(L, 2); /* key */ lua_gettable(L, -2); /* on lua 5.1, we trade the "tolua_peers" lookup for a gettable call */ if (!lua_isnil(L, -1)) return 1; }; #else lua_pushstring(L,"tolua_peers"); lua_rawget(L,LUA_REGISTRYINDEX); /* stack: obj key ubox */ lua_pushvalue(L,1); lua_rawget(L,-2); /* stack: obj key ubox ubox[u] */ if (lua_istable(L,-1)) { lua_pushvalue(L,2); /* key */ lua_rawget(L,-2); /* stack: obj key ubox ubox[u] value */ if (!lua_isnil(L,-1)) return 1; } #endif lua_settop(L,2); /* stack: obj key */ /* Try metatables */ lua_pushvalue(L,1); /* stack: obj key obj */ while (lua_getmetatable(L,-1)) { /* stack: obj key obj mt */ lua_remove(L,-2); /* stack: obj key mt */ if (lua_isnumber(L,2)) /* check if key is a numeric value */ { /* try operator[] */ lua_pushstring(L,".geti"); lua_rawget(L,-2); /* stack: obj key mt func */ if (lua_isfunction(L,-1)) { lua_pushvalue(L,1); lua_pushvalue(L,2); lua_call(L,2,1); return 1; } } else { lua_pushvalue(L,2); /* stack: obj key mt key */ lua_rawget(L,-2); /* stack: obj key mt value */ if (!lua_isnil(L,-1)) return 1; else lua_pop(L,1); /* try C/C++ variable */ lua_pushstring(L,".get"); lua_rawget(L,-2); /* stack: obj key mt tget */ if (lua_istable(L,-1)) { lua_pushvalue(L,2); lua_rawget(L,-2); /* stack: obj key mt value */ if (lua_iscfunction(L,-1)) { lua_pushvalue(L,1); lua_pushvalue(L,2); lua_call(L,2,1); return 1; } else if (lua_istable(L,-1)) { /* deal with array: create table to be returned and cache it in ubox */ void* u = *((void**)lua_touserdata(L,1)); lua_newtable(L); /* stack: obj key mt value table */ lua_pushstring(L,".self"); lua_pushlightuserdata(L,u); lua_rawset(L,-3); /* store usertype in ".self" */ lua_insert(L,-2); /* stack: obj key mt table value */ lua_setmetatable(L,-2); /* set stored value as metatable */ lua_pushvalue(L,-1); /* stack: obj key met table table */ lua_pushvalue(L,2); /* stack: obj key mt table table key */ lua_insert(L,-2); /* stack: obj key mt table key table */ storeatubox(L,1); /* stack: obj key mt table */ return 1; } } } lua_settop(L,3); } lua_pushnil(L); return 1; } else if (t== LUA_TTABLE) { module_index_event(L); return 1; } lua_pushnil(L); return 1; }
/* Class index function * If the object is a userdata (ie, an object), it searches the field in * the alternative table stored in the corresponding "peer" table. */ static int class_index_event (lua_State* L) { int t = lua_type(L,1); if (t == LUA_TUSERDATA) { /* Access alternative table */ lua_pushstring(L,"tolua_peer"); lua_rawget(L,LUA_REGISTRYINDEX); /* stack: obj key peer */ lua_pushvalue(L,1); lua_rawget(L,-2); /* stack: obj key peer peer[u] */ if (lua_istable(L,-1)) { lua_pushvalue(L,2); /* key */ lua_rawget(L,-2); /* stack: obj key peer peer[u] value */ if (!lua_isnil(L,-1)) return 1; } lua_settop(L,2); /* stack: obj key */ /* Try metatables */ lua_pushvalue(L,1); /* stack: obj key obj */ while (lua_getmetatable(L,-1)) { /* stack: obj key obj mt */ lua_remove(L,-2); /* stack: obj key mt */ if (lua_isnumber(L,2)) /* check if key is a numeric value */ { /* try operator[] */ lua_pushstring(L,".geti"); lua_rawget(L,-2); /* stack: obj key mt func */ if (lua_isfunction(L,-1)) { lua_pushvalue(L,1); lua_pushvalue(L,2); lua_call(L,2,1); return 1; } } else { lua_pushvalue(L,2); /* stack: obj key mt key */ lua_rawget(L,-2); /* stack: obj key mt value */ if (!lua_isnil(L,-1)) return 1; else lua_pop(L,1); /* try C/C++ variable */ lua_pushstring(L,".get"); lua_rawget(L,-2); /* stack: obj key mt tget */ if (lua_istable(L,-1)) { lua_pushvalue(L,2); lua_rawget(L,-2); /* stack: obj key mt value */ if (lua_iscfunction(L,-1)) { lua_pushvalue(L,1); lua_pushvalue(L,2); lua_call(L,2,1); return 1; } else if (lua_istable(L,-1)) { /* deal with array: create table to be returned and cache it in peer */ void* u = *((void**)lua_touserdata(L,1)); lua_newtable(L); /* stack: obj key mt value table */ lua_pushstring(L,".self"); lua_pushlightuserdata(L,u); lua_rawset(L,-3); /* store usertype in ".self" */ lua_insert(L,-2); /* stack: obj key mt table value */ lua_setmetatable(L,-2); /* set stored value as metatable */ lua_pushvalue(L,-1); /* stack: obj key met table table */ lua_pushvalue(L,2); /* stack: obj key mt table table key */ lua_insert(L,-2); /* stack: obj key mt table key table */ storeatpeer(L,1); /* stack: obj key mt table */ return 1; } } } lua_settop(L,3); } lua_pushnil(L); return 1; } else if (t== LUA_TTABLE) { module_index_event(L); return 1; } lua_pushnil(L); return 1; }