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/* tolua: functions to push C values.
** Support code for Lua bindings.
** Written by Waldemar Celes
** TeCGraf/PUC-Rio
** Apr 2003
*/
/* This code is free software; you can redistribute it and/or modify it.
** The software provided hereunder is on an "as is" basis, and
** the author has no obligation to provide maintenance, support, updates,
** enhancements, or modifications.
*/
#include "tolua++.h"
#include "lauxlib.h"
#include <stdlib.h>
TOLUA_API void tolua_pushvalue (lua_State* L, int lo)
{
lua_pushvalue(L,lo);
}
TOLUA_API void tolua_pushboolean (lua_State* L, int value)
{
lua_pushboolean(L,value);
}
TOLUA_API void tolua_pushnumber (lua_State* L, lua_Number value)
{
lua_pushnumber(L,value);
}
TOLUA_API void tolua_pushstring (lua_State* L, const char* value)
{
if (value == NULL)
lua_pushnil(L);
else
lua_pushstring(L,value);
}
TOLUA_API void tolua_pushuserdata (lua_State* L, void* value)
{
if (value == NULL)
lua_pushnil(L);
else
lua_pushlightuserdata(L,value);
}
TOLUA_API void tolua_pushusertype (lua_State* L, void* value, const char* type)
{
if (value == NULL)
lua_pushnil(L);
else
{
luaL_getmetatable(L, type);
lua_pushstring(L,"tolua_ubox");
lua_rawget(L,-2); /* stack: mt ubox */
if (lua_isnil(L, -1)) {
lua_pop(L, 1);
lua_pushstring(L, "tolua_ubox");
lua_rawget(L, LUA_REGISTRYINDEX);
};
lua_pushlightuserdata(L,value);
lua_rawget(L,-2); /* stack: mt ubox ubox[u] */
if (lua_isnil(L,-1))
{
lua_pop(L,1); /* stack: mt ubox */
lua_pushlightuserdata(L,value);
*(void**)lua_newuserdata(L,sizeof(void *)) = value; /* stack: mt ubox u newud */
lua_pushvalue(L,-1); /* stack: mt ubox u newud newud */
lua_insert(L,-4); /* stack: mt newud ubox u newud */
lua_rawset(L,-3); /* stack: mt newud ubox */
lua_pop(L,1); /* stack: mt newud */
/*luaL_getmetatable(L,type);*/
lua_pushvalue(L, -2); /* stack: mt newud mt */
lua_setmetatable(L,-2); /* stack: mt newud */
#ifdef LUA_VERSION_NUM
lua_pushvalue(L, TOLUA_NOPEER);
lua_setfenv(L, -2);
#endif
}
else
{
/* check the need of updating the metatable to a more specialized class */
lua_insert(L,-2); /* stack: mt ubox[u] ubox */
lua_pop(L,1); /* stack: mt ubox[u] */
lua_pushstring(L,"tolua_super");
lua_rawget(L,LUA_REGISTRYINDEX); /* stack: mt ubox[u] super */
lua_getmetatable(L,-2); /* stack: mt ubox[u] super mt */
lua_rawget(L,-2); /* stack: mt ubox[u] super super[mt] */
if (lua_istable(L,-1))
{
lua_pushstring(L,type); /* stack: mt ubox[u] super super[mt] type */
lua_rawget(L,-2); /* stack: mt ubox[u] super super[mt] flag */
if (lua_toboolean(L,-1) == 1) /* if true */
{
lua_pop(L,3); /* mt ubox[u]*/
lua_remove(L, -2);
return;
}
}
/* type represents a more specilized type */
/*luaL_getmetatable(L,type); // stack: mt ubox[u] super super[mt] flag mt */
lua_pushvalue(L, -5); /* stack: mt ubox[u] super super[mt] flag mt */
lua_setmetatable(L,-5); /* stack: mt ubox[u] super super[mt] flag */
lua_pop(L,3); /* stack: mt ubox[u] */
}
lua_remove(L, -2); /* stack: ubox[u]*/
}
}
TOLUA_API void tolua_pushusertype_and_takeownership (lua_State* L, void* value, const char* type)
{
tolua_pushusertype(L,value,type);
tolua_register_gc(L,lua_gettop(L));
}
TOLUA_API void tolua_pushfieldvalue (lua_State* L, int lo, int index, int v)
{
lua_pushnumber(L,index);
lua_pushvalue(L,v);
lua_settable(L,lo);
}
TOLUA_API void tolua_pushfieldboolean (lua_State* L, int lo, int index, int v)
{
lua_pushnumber(L,index);
lua_pushboolean(L,v);
lua_settable(L,lo);
}
TOLUA_API void tolua_pushfieldnumber (lua_State* L, int lo, int index, lua_Number v)
{
lua_pushnumber(L,index);
tolua_pushnumber(L,v);
lua_settable(L,lo);
}
TOLUA_API void tolua_pushfieldstring (lua_State* L, int lo, int index, const char* v)
{
lua_pushnumber(L,index);
tolua_pushstring(L,v);
lua_settable(L,lo);
}
TOLUA_API void tolua_pushfielduserdata (lua_State* L, int lo, int index, void* v)
{
lua_pushnumber(L,index);
tolua_pushuserdata(L,v);
lua_settable(L,lo);
}
TOLUA_API void tolua_pushfieldusertype (lua_State* L, int lo, int index, void* v, const char* type)
{
lua_pushnumber(L,index);
tolua_pushusertype(L,v,type);
lua_settable(L,lo);
}
TOLUA_API void tolua_pushfieldusertype_and_takeownership (lua_State* L, int lo, int index, void* v, const char* type)
{
lua_pushnumber(L,index);
tolua_pushusertype(L,v,type);
tolua_register_gc(L,lua_gettop(L));
lua_settable(L,lo);
}
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