mirror of https://github.com/axmolengine/axmol.git
647 lines
20 KiB
C
647 lines
20 KiB
C
/* tolua: event functions
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** Support code for Lua bindings.
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** Written by Waldemar Celes
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** TeCGraf/PUC-Rio
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** Apr 2003
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** $Id: $
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*/
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/* This code is free software; you can redistribute it and/or modify it.
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** The software provided hereunder is on an "as is" basis, and
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** the author has no obligation to provide maintenance, support, updates,
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** enhancements, or modifications.
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*/
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#include <stdio.h>
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#include "tolua++.h"
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/* Store at ubox
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* It stores, creating the corresponding table if needed,
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* the pair key/value in the corresponding ubox table
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*/
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static void storeatubox (lua_State* L, int lo)
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{
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#ifdef LUA_VERSION_NUM
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lua_getfenv(L, lo);
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if (lua_rawequal(L, -1, TOLUA_NOPEER)) {
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lua_pop(L, 1);
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lua_newtable(L);
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lua_pushvalue(L, -1);
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lua_setfenv(L, lo); /* stack: k,v,table */
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};
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lua_insert(L, -3);
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lua_settable(L, -3); /* on lua 5.1, we trade the "tolua_peers" lookup for a settable call */
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lua_pop(L, 1);
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#else
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/* stack: key value (to be stored) */
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lua_pushstring(L,"tolua_peers");
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lua_rawget(L,LUA_REGISTRYINDEX); /* stack: k v ubox */
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lua_pushvalue(L,lo);
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lua_rawget(L,-2); /* stack: k v ubox ubox[u] */
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if (!lua_istable(L,-1))
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{
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lua_pop(L,1); /* stack: k v ubox */
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lua_newtable(L); /* stack: k v ubox table */
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lua_pushvalue(L,1);
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lua_pushvalue(L,-2); /* stack: k v ubox table u table */
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lua_rawset(L,-4); /* stack: k v ubox ubox[u]=table */
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}
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lua_insert(L,-4); /* put table before k */
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lua_pop(L,1); /* pop ubox */
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lua_rawset(L,-3); /* store at table */
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lua_pop(L,1); /* pop ubox[u] */
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#endif
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}
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/* Module index function
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*/
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static int module_index_event (lua_State* L)
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{
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lua_pushstring(L,".get");
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lua_rawget(L,-3);
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if (lua_istable(L,-1))
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{
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lua_pushvalue(L,2); /* key */
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lua_rawget(L,-2);
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if (lua_iscfunction(L,-1))
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{
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lua_call(L,0,1);
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return 1;
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}
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else if (lua_istable(L,-1))
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return 1;
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}
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/* call old index meta event */
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if (lua_getmetatable(L,1))
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{
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lua_pushstring(L,"__index");
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lua_rawget(L,-2);
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lua_pushvalue(L,1);
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lua_pushvalue(L,2);
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if (lua_isfunction(L,-1))
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{
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lua_call(L,2,1);
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return 1;
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}
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else if (lua_istable(L,-1))
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{
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lua_gettable(L,-3);
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return 1;
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}
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}
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lua_pushnil(L);
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return 1;
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}
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/* Module newindex function
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*/
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static int module_newindex_event (lua_State* L)
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{
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lua_pushstring(L,".set");
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lua_rawget(L,-4);
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if (lua_istable(L,-1))
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{
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lua_pushvalue(L,2); /* key */
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lua_rawget(L,-2);
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if (lua_iscfunction(L,-1))
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{
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lua_pushvalue(L,1); /* only to be compatible with non-static vars */
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lua_pushvalue(L,3); /* value */
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lua_call(L,2,0);
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return 0;
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}
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}
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/* call old newindex meta event */
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if (lua_getmetatable(L,1) && lua_getmetatable(L,-1))
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{
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lua_pushstring(L,"__newindex");
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lua_rawget(L,-2);
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if (lua_isfunction(L,-1))
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{
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lua_pushvalue(L,1);
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lua_pushvalue(L,2);
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lua_pushvalue(L,3);
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lua_call(L,3,0);
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}
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}
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lua_settop(L,3);
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lua_rawset(L,-3);
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return 0;
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}
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static int class_table_get_index (lua_State* L)
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{
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// stack: obj key ... obj
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while (lua_getmetatable(L,-1)) { /* stack: obj key obj mt */
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lua_remove(L,-2); /* stack: ... mt */
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lua_pushvalue(L,2); /* stack: ... mt key */
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lua_rawget(L,-2); /* stack: ... mt value */
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if (!lua_isnil(L,-1)) {
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return 1;
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} else {
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lua_pop(L,1);
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}
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/* try C/C++ variable */
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lua_pushstring(L,".get");
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lua_rawget(L,-2); /* stack: obj key ... mt tget */
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if (lua_istable(L,-1)) {
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lua_pushvalue(L,2); /* stack: obj key ... mt tget key */
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lua_rawget(L,-2); /* stack: obj key ... mt tget value */
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if (lua_iscfunction(L,-1)) {
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lua_call(L,0,1);
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return 1;
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} else if (lua_istable(L,-1)) {
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return 1;
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}
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lua_pop(L, 2);
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}
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}
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lua_pushnil(L);
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return 1;
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}
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/* Class index function
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* If the object is a userdata (ie, an object), it searches the field in
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* the alternative table stored in the corresponding "ubox" table.
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*/
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static int class_index_event (lua_State* L)
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{
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int t = lua_type(L,1);
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if (t == LUA_TUSERDATA)
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{
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/* Access alternative table */
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#ifdef LUA_VERSION_NUM /* new macro on version 5.1 */
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lua_getfenv(L,1);
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if (!lua_rawequal(L, -1, TOLUA_NOPEER)) {
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lua_pushvalue(L, 2); /* key */
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lua_gettable(L, -2); /* on lua 5.1, we trade the "tolua_peers" lookup for a gettable call */
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if (!lua_isnil(L, -1))
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return 1;
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};
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#else
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lua_pushstring(L,"tolua_peers");
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lua_rawget(L,LUA_REGISTRYINDEX); /* stack: obj key ubox */
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lua_pushvalue(L,1);
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lua_rawget(L,-2); /* stack: obj key ubox ubox[u] */
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if (lua_istable(L,-1))
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{
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lua_pushvalue(L,2); /* key */
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lua_rawget(L,-2); /* stack: obj key ubox ubox[u] value */
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if (!lua_isnil(L,-1))
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return 1;
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}
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#endif
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lua_settop(L,2); /* stack: obj key */
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/* Try metatables */
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lua_pushvalue(L,1); /* stack: obj key obj */
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while (lua_getmetatable(L,-1))
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{ /* stack: obj key obj mt */
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lua_remove(L,-2); /* stack: obj key mt */
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if (lua_isnumber(L,2)) /* check if key is a numeric value */
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{
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/* try operator[] */
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lua_pushstring(L,".geti");
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lua_rawget(L,-2); /* stack: obj key mt func */
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if (lua_isfunction(L,-1))
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{
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lua_pushvalue(L,1);
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lua_pushvalue(L,2);
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lua_call(L,2,1);
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return 1;
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}
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}
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else
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{
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lua_pushvalue(L,2); /* stack: obj key mt key */
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lua_rawget(L,-2); /* stack: obj key mt value */
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if (!lua_isnil(L,-1))
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return 1;
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else
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lua_pop(L,1);
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/* try C/C++ variable */
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lua_pushstring(L,".get");
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lua_rawget(L,-2); /* stack: obj key mt tget */
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if (lua_istable(L,-1))
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{
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lua_pushvalue(L,2);
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lua_rawget(L,-2); /* stack: obj key mt value */
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if (lua_iscfunction(L,-1))
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{
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lua_pushvalue(L,1);
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lua_pushvalue(L,2);
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lua_call(L,2,1);
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return 1;
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}
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else if (lua_istable(L,-1))
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{
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/* deal with array: create table to be returned and cache it in ubox */
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void* u = *((void**)lua_touserdata(L,1));
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lua_newtable(L); /* stack: obj key mt value table */
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lua_pushstring(L,".self");
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lua_pushlightuserdata(L,u);
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lua_rawset(L,-3); /* store usertype in ".self" */
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lua_insert(L,-2); /* stack: obj key mt table value */
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lua_setmetatable(L,-2); /* set stored value as metatable */
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lua_pushvalue(L,-1); /* stack: obj key met table table */
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lua_pushvalue(L,2); /* stack: obj key mt table table key */
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lua_insert(L,-2); /* stack: obj key mt table key table */
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storeatubox(L,1); /* stack: obj key mt table */
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return 1;
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}
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}
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}
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lua_settop(L,3);
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}
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lua_pushnil(L);
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return 1;
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}
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else if (t== LUA_TTABLE)
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{
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lua_pushvalue(L,1);
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class_table_get_index(L);
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return 1;
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}
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lua_pushnil(L);
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return 1;
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}
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static int class_backup_before_newindex (lua_State* L)
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{
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/* stack: t k v */
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int m;
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lua_pushvalue(L, 1);
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m = lua_getmetatable(L,-1); /* stack: t k v t mt */
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while (m>0 && lua_istable(L,-1)) {
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lua_remove(L, -2); /* stack: t k v mt */
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//Check if key had been backup
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lua_pushstring(L, ".backup");
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lua_rawget(L, -2); /* stack: t k v mt mt[".backup"] */
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if (!lua_isnil(L, -1)) {
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lua_pushvalue(L, 2); /* stack: t k v mt mt[".backup"] k */
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lua_rawget(L, -2);
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if (!lua_isnil(L, -1)) {
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// key had been backup
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return 0;
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}
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lua_pop(L, 1);
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}
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lua_pop(L, 1); /* stack: t k v mt */
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//Check if key is exist in mt
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lua_pushvalue(L, 2);
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lua_rawget(L, -2); /* stack: t k v mt mt[k] */
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if (!lua_isnil(L, -1)) {
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lua_pushvalue(L, -2); /* stack: t k v mt mt[k] mt */
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lua_pushstring(L, ".backup");
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lua_rawget(L, -2); /* stack: t k v mt mt[k] mt mt[".backup"] */
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if (lua_isnil(L, -1)) {
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//Create a table and set to mt[".backup"]
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lua_pop(L, 1); /* stack: t k v mt mt[k] mt */
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lua_pushstring(L, ".backup");
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lua_newtable(L);
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lua_rawset(L, -3);
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lua_pushstring(L, ".backup");
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lua_rawget(L, -2); /* stack: t k v mt mt[k] mt mt[".backup"] */
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}
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lua_pushvalue(L, 2); /* stack: t k v mt mt[k] mt mt[".backup"] k */
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lua_pushvalue(L, -4); /* stack: t k v mt mt[k] mt mt[".backup"] k mt[k] */
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lua_rawset(L, -3);
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return 0;
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}
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lua_pop(L, 1); /* stack: t k v mt */
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m = lua_getmetatable(L,-1); /* stack: t k v mt base_mt */
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}
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return 0;
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}
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/* Newindex function
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* It first searches for a C/C++ varaible to be set.
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* Then, it either stores it in the alternative ubox table (in the case it is
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* an object) or in the own table (that represents the class or module).
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*/
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static int class_newindex_event (lua_State* L)
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{
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int t = lua_type(L,1);
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if (t == LUA_TUSERDATA)
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{
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/* Try accessing a C/C++ variable to be set */
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lua_getmetatable(L,1);
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while (lua_istable(L,-1)) /* stack: t k v mt */
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{
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if (lua_isnumber(L,2)) /* check if key is a numeric value */
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{
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/* try operator[] */
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lua_pushstring(L,".seti");
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lua_rawget(L,-2); /* stack: obj key mt func */
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if (lua_isfunction(L,-1))
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{
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lua_pushvalue(L,1);
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lua_pushvalue(L,2);
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lua_pushvalue(L,3);
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lua_call(L,3,0);
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return 0;
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}
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}
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else
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{
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lua_pushstring(L,".set");
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lua_rawget(L,-2); /* stack: t k v mt tset */
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if (lua_istable(L,-1))
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{
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lua_pushvalue(L,2);
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lua_rawget(L,-2); /* stack: t k v mt tset func */
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if (lua_iscfunction(L,-1))
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{
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lua_pushvalue(L,1);
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lua_pushvalue(L,3);
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lua_call(L,2,0);
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return 0;
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}
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lua_pop(L,1); /* stack: t k v mt tset */
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}
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lua_pop(L,1); /* stack: t k v mt */
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if (!lua_getmetatable(L,-1)) /* stack: t k v mt mt */
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lua_pushnil(L);
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lua_remove(L,-2); /* stack: t k v mt */
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}
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}
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lua_settop(L,3); /* stack: t k v */
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/* then, store as a new field */
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storeatubox(L,1);
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}
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else if (t== LUA_TTABLE)
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{
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lua_getmetatable(L,1); /* stack: t k v mt */
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lua_pushstring(L,".set");
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lua_rawget(L,-2); /* stack: t k v mt tset */
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if (lua_istable(L,-1)) {
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lua_pushvalue(L,2); /* stack: t k v mt tset k */
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lua_rawget(L,-2);
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if (lua_iscfunction(L,-1)) { /* ... func */
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lua_pushvalue(L,1); /* ... func t */
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lua_pushvalue(L,3); /* ... func t v */
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lua_call(L,2,0);
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return 0;
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}
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}
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lua_settop(L,3);
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class_backup_before_newindex(L);
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lua_settop(L,3);
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lua_getmetatable(L,1); /* stack: t k v mt */
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lua_replace(L, 1); /* stack: mt k v */
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lua_rawset(L,1);
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}
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return 0;
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}
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static int class_call_event(lua_State* L) {
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if (lua_istable(L, 1)) {
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//class is not a metatable now, so must get it's metatable to access ".call" function. 2014.6.5 by SunLightJuly
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if (lua_getmetatable(L, 1)) {
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lua_replace(L, 1);
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lua_pushstring(L, ".call");
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lua_rawget(L, 1);
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if (lua_isfunction(L, -1)) {
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lua_insert(L, 1);
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lua_call(L, lua_gettop(L)-1, 1);
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return 1;
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}
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}
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}
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tolua_error(L,"Attempt to call a non-callable object.",NULL);
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return 0;
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};
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static int do_operator (lua_State* L, const char* op)
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{
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if (lua_isuserdata(L,1))
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{
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/* Try metatables */
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lua_pushvalue(L,1); /* stack: op1 op2 */
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while (lua_getmetatable(L,-1))
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{ /* stack: op1 op2 op1 mt */
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lua_remove(L,-2); /* stack: op1 op2 mt */
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lua_pushstring(L,op); /* stack: op1 op2 mt key */
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lua_rawget(L,-2); /* stack: obj key mt func */
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if (lua_isfunction(L,-1))
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{
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lua_pushvalue(L,1);
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lua_pushvalue(L,2);
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lua_call(L,2,1);
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return 1;
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}
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lua_settop(L,3);
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}
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}
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tolua_error(L,"Attempt to perform operation on an invalid operand",NULL);
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return 0;
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}
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static int class_add_event (lua_State* L)
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{
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return do_operator(L,".add");
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}
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int class_sub_event (lua_State* L)
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{
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return do_operator(L,".sub");
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}
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static int class_mul_event (lua_State* L)
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{
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return do_operator(L,".mul");
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}
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static int class_div_event (lua_State* L)
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{
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return do_operator(L,".div");
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}
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static int class_lt_event (lua_State* L)
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{
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return do_operator(L,".lt");
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}
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static int class_le_event (lua_State* L)
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{
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return do_operator(L,".le");
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}
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static int class_eq_event (lua_State* L)
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{
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/* copying code from do_operator here to return false when no operator is found */
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if (lua_isuserdata(L,1))
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{
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/* Try metatables */
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lua_pushvalue(L,1); /* stack: op1 op2 */
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while (lua_getmetatable(L,-1))
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{ /* stack: op1 op2 op1 mt */
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lua_remove(L,-2); /* stack: op1 op2 mt */
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lua_pushstring(L,".eq"); /* stack: op1 op2 mt key */
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lua_rawget(L,-2); /* stack: obj key mt func */
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if (lua_isfunction(L,-1))
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{
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lua_pushvalue(L,1);
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lua_pushvalue(L,2);
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lua_call(L,2,1);
|
|
return 1;
|
|
}
|
|
lua_settop(L,3);
|
|
}
|
|
}
|
|
|
|
lua_settop(L, 3);
|
|
lua_pushboolean(L, 0);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
static int class_gc_event (lua_State* L)
|
|
{
|
|
void* u = *((void**)lua_touserdata(L,1));
|
|
fprintf(stderr, "collecting: looking at %p\n", u);
|
|
lua_pushstring(L,"tolua_gc");
|
|
lua_rawget(L,LUA_REGISTRYINDEX);
|
|
lua_pushlightuserdata(L,u);
|
|
lua_rawget(L,-2);
|
|
if (lua_isfunction(L,-1))
|
|
{
|
|
lua_pushvalue(L,1);
|
|
lua_call(L,1,0);
|
|
lua_pushlightuserdata(L,u);
|
|
lua_pushnil(L);
|
|
lua_rawset(L,-3);
|
|
}
|
|
lua_pop(L,2);
|
|
return 0;
|
|
}
|
|
*/
|
|
TOLUA_API int class_gc_event (lua_State* L)
|
|
{
|
|
void** pu = (void**)lua_touserdata(L, 1);
|
|
if (!pu) return 0;
|
|
void* u = *pu;
|
|
int top;
|
|
/*fprintf(stderr, "collecting: looking at %p\n", u);*/
|
|
/*
|
|
lua_pushstring(L,"tolua_gc");
|
|
lua_rawget(L,LUA_REGISTRYINDEX);
|
|
*/
|
|
lua_pushvalue(L, lua_upvalueindex(1));
|
|
lua_pushlightuserdata(L,u);
|
|
lua_rawget(L,-2); /* stack: gc umt */
|
|
lua_getmetatable(L,1); /* stack: gc umt mt */
|
|
/*fprintf(stderr, "checking type\n");*/
|
|
top = lua_gettop(L);
|
|
if (tolua_fast_isa(L,top,top-1, lua_upvalueindex(2))) /* make sure we collect correct type */
|
|
{
|
|
/*fprintf(stderr, "Found type!\n");*/
|
|
/* get gc function */
|
|
lua_pushliteral(L,".collector");
|
|
lua_rawget(L,-2); /* stack: gc umt mt collector */
|
|
if (lua_isfunction(L,-1)) {
|
|
/*fprintf(stderr, "Found .collector!\n");*/
|
|
}
|
|
else {
|
|
lua_pop(L,1);
|
|
/*fprintf(stderr, "Using default cleanup\n");*/
|
|
lua_pushcfunction(L,tolua_default_collect);
|
|
}
|
|
|
|
lua_pushvalue(L,1); /* stack: gc umt mt collector u */
|
|
lua_call(L,1,0);
|
|
|
|
lua_pushlightuserdata(L,u); /* stack: gc umt mt u */
|
|
lua_pushnil(L); /* stack: gc umt mt u nil */
|
|
lua_rawset(L,-5); /* stack: gc umt mt */
|
|
}
|
|
lua_pop(L,3);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Register module events
|
|
* It expects the metatable on the top of the stack
|
|
*/
|
|
TOLUA_API void tolua_moduleevents (lua_State* L)
|
|
{
|
|
lua_pushstring(L,"__index");
|
|
lua_pushcfunction(L,module_index_event);
|
|
lua_rawset(L,-3);
|
|
lua_pushstring(L,"__newindex");
|
|
lua_pushcfunction(L,module_newindex_event);
|
|
lua_rawset(L,-3);
|
|
}
|
|
|
|
/* Check if the object on the top has a module metatable
|
|
*/
|
|
TOLUA_API int tolua_ismodulemetatable (lua_State* L)
|
|
{
|
|
int r = 0;
|
|
if (lua_getmetatable(L,-1))
|
|
{
|
|
lua_pushstring(L,"__index");
|
|
lua_rawget(L,-2);
|
|
r = (lua_tocfunction(L,-1) == module_index_event);
|
|
lua_pop(L,2);
|
|
}
|
|
return r;
|
|
}
|
|
|
|
/* Register class events
|
|
* It expects the metatable on the top of the stack
|
|
*/
|
|
TOLUA_API void tolua_classevents (lua_State* L)
|
|
{
|
|
lua_pushstring(L,"__index");
|
|
lua_pushcfunction(L,class_index_event);
|
|
lua_rawset(L,-3);
|
|
lua_pushstring(L,"__newindex");
|
|
lua_pushcfunction(L,class_newindex_event);
|
|
lua_rawset(L,-3);
|
|
|
|
lua_pushstring(L,"__add");
|
|
lua_pushcfunction(L,class_add_event);
|
|
lua_rawset(L,-3);
|
|
lua_pushstring(L,"__sub");
|
|
lua_pushcfunction(L,class_sub_event);
|
|
lua_rawset(L,-3);
|
|
lua_pushstring(L,"__mul");
|
|
lua_pushcfunction(L,class_mul_event);
|
|
lua_rawset(L,-3);
|
|
lua_pushstring(L,"__div");
|
|
lua_pushcfunction(L,class_div_event);
|
|
lua_rawset(L,-3);
|
|
|
|
lua_pushstring(L,"__lt");
|
|
lua_pushcfunction(L,class_lt_event);
|
|
lua_rawset(L,-3);
|
|
lua_pushstring(L,"__le");
|
|
lua_pushcfunction(L,class_le_event);
|
|
lua_rawset(L,-3);
|
|
lua_pushstring(L,"__eq");
|
|
lua_pushcfunction(L,class_eq_event);
|
|
lua_rawset(L,-3);
|
|
|
|
lua_pushstring(L,"__call");
|
|
lua_pushcfunction(L,class_call_event);
|
|
lua_rawset(L,-3);
|
|
|
|
lua_pushstring(L,"__gc");
|
|
lua_pushstring(L, "tolua_gc_event");
|
|
lua_rawget(L, LUA_REGISTRYINDEX);
|
|
/*lua_pushcfunction(L,class_gc_event);*/
|
|
lua_rawset(L,-3);
|
|
}
|
|
|