134 lines
3.0 KiB
C
134 lines
3.0 KiB
C
/* tolua: funcitons to convert to C types
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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 "../../include/tolua++.h"
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#include <string.h>
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#include <stdlib.h>
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TOLUA_API lua_Number tolua_tonumber (lua_State* L, int narg, lua_Number def)
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{
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return lua_gettop(L)<abs(narg) ? def : lua_tonumber(L,narg);
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}
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TOLUA_API const char* tolua_tostring (lua_State* L, int narg, const char* def)
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{
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return lua_gettop(L)<abs(narg) ? def : lua_tostring(L,narg);
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}
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TOLUA_API void* tolua_touserdata (lua_State* L, int narg, void* def)
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{
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/* return lua_gettop(L)<abs(narg) ? def : lua_touserdata(L,narg); */
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if (lua_gettop(L)<abs(narg)) {
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return def;
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};
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if (lua_islightuserdata(L, narg)) {
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return lua_touserdata(L,narg);
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};
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return tolua_tousertype(L, narg, def);
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}
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extern int push_table_instance(lua_State* L, int lo);
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TOLUA_API void* tolua_tousertype (lua_State* L, int narg, void* def)
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{
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if (lua_gettop(L)<abs(narg))
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return def;
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else
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{
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void* u;
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if (!lua_isuserdata(L, narg)) {
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if (!push_table_instance(L, narg)) return NULL;
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};
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u = lua_touserdata(L,narg);
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return (u==NULL) ? NULL : *((void**)u); /* nil represents NULL */
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}
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}
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TOLUA_API int tolua_tovalue (lua_State* L, int narg, int def)
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{
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return lua_gettop(L)<abs(narg) ? def : narg;
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}
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TOLUA_API int tolua_toboolean (lua_State* L, int narg, int def)
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{
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return lua_gettop(L)<abs(narg) ? def : lua_toboolean(L,narg);
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}
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TOLUA_API lua_Number tolua_tofieldnumber (lua_State* L, int lo, int index, lua_Number def)
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{
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double v;
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lua_pushnumber(L,index);
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lua_gettable(L,lo);
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v = lua_isnil(L,-1) ? def : lua_tonumber(L,-1);
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lua_pop(L,1);
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return v;
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}
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TOLUA_API const char* tolua_tofieldstring
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(lua_State* L, int lo, int index, const char* def)
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{
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const char* v;
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lua_pushnumber(L,index);
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lua_gettable(L,lo);
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v = lua_isnil(L,-1) ? def : lua_tostring(L,-1);
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lua_pop(L,1);
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return v;
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}
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TOLUA_API void* tolua_tofielduserdata (lua_State* L, int lo, int index, void* def)
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{
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void* v;
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lua_pushnumber(L,index);
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lua_gettable(L,lo);
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v = lua_isnil(L,-1) ? def : lua_touserdata(L,-1);
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lua_pop(L,1);
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return v;
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}
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TOLUA_API void* tolua_tofieldusertype (lua_State* L, int lo, int index, void* def)
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{
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void* v;
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lua_pushnumber(L,index);
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lua_gettable(L,lo);
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v = lua_isnil(L,-1) ? def : (*(void **)(lua_touserdata(L, -1))); /* lua_unboxpointer(L,-1); */
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lua_pop(L,1);
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return v;
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}
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TOLUA_API int tolua_tofieldvalue (lua_State* L, int lo, int index, int def)
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{
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int v;
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lua_pushnumber(L,index);
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lua_gettable(L,lo);
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v = lua_isnil(L,-1) ? def : lo;
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lua_pop(L,1);
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return v;
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}
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TOLUA_API int tolua_getfieldboolean (lua_State* L, int lo, int index, int def)
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{
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int v;
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lua_pushnumber(L,index);
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lua_gettable(L,lo);
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v = lua_isnil(L,-1) ? 0 : lua_toboolean(L,-1);
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lua_pop(L,1);
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return v;
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}
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