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#include "StdAfx.h"
// LuaBitOps.cpp: implementation of the LuaBitOps class.
//
//////////////////////////////////////////////////////////////////////
#include "mmgr.h"
#include "LuaBitOps.h"
#include "LuaInclude.h"
#include "LuaUtils.h"
const int mask = 0x00FFFFFF; // 2^24
/******************************************************************************/
/******************************************************************************/
bool LuaBitOps::PushEntries(lua_State* L)
{
LuaPushNamedCFunc(L, "bit_or", bit_or);
LuaPushNamedCFunc(L, "bit_and", bit_and);
LuaPushNamedCFunc(L, "bit_xor", bit_xor);
LuaPushNamedCFunc(L, "bit_inv", bit_inv);
LuaPushNamedCFunc(L, "bit_bits", bit_bits);
return true;
}
/******************************************************************************/
/******************************************************************************/
static inline unsigned int luaL_checkuint(lua_State* L, int index)
{
return (unsigned int)luaL_checkint(L, index);
}
int LuaBitOps::bit_or(lua_State* L)
{
unsigned int result = 0x00000000;
for (int i = 1; !lua_isnone(L, i); i++) {
result = result | luaL_checkuint(L, i);
}
lua_pushnumber(L, result & mask);
return 1;
}
int LuaBitOps::bit_and(lua_State* L)
{
unsigned int result = 0xFFFFFFFF;
for (int i = 1; !lua_isnone(L, i); i++) {
result = result & luaL_checkuint(L, i);
}
lua_pushnumber(L, result & mask);
return 1;
}
int LuaBitOps::bit_xor(lua_State* L)
{
unsigned int result = 0x00000000;
for (int i = 1; !lua_isnone(L, i); i++) {
result = result ^ luaL_checkuint(L, i);
}
lua_pushnumber(L, result & mask);
return 1;
}
int LuaBitOps::bit_inv(lua_State* L)
{
const unsigned int result = ~luaL_checkuint(L, 1);
lua_pushnumber(L, result & mask);
return 1;
}
int LuaBitOps::bit_bits(lua_State* L)
{
unsigned int result = 0x00000000;
for (int i = 1; !lua_isnone(L, i); i++) {
const int bit = (unsigned int)luaL_checkint(L, i);
result = result | (1 << bit);
}
lua_pushnumber(L, result & mask);
return 1;
}
/******************************************************************************/
/******************************************************************************/
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