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path: root/src/libjin-lua/modules/bit/l_bit.cpp
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#include "common/l_common.h"
#include "common/je_lua.h"
#include "libjin/jin.h"

#include <cstdlib>

namespace JinEngine
{
	namespace Lua
	{

		LUA_IMPLEMENT int l_and(lua_State* L)
		{
			int a = luax_checkinteger(L, 1);
			int b = luax_checkinteger(L, 2);
			luax_pushinteger(L, a & b);
			return 1;
		}

		LUA_IMPLEMENT int l_or(lua_State* L)
		{
			int a = luax_checkinteger(L, 1);
			int b = luax_checkinteger(L, 2);
			luax_pushinteger(L, a | b);
			return 1;
		}

		LUA_IMPLEMENT int l_xor(lua_State* L)
		{
			int a = luax_checkinteger(L, 1);
			int b = luax_checkinteger(L, 2);
			luax_pushinteger(L, a ^ b);
			return 1;
		}

		LUA_IMPLEMENT int l_not(lua_State* L)
		{
			int n = luax_checkinteger(L, 1);
			luax_pushinteger(L, ~n);
			return 1;
		}

		LUA_IMPLEMENT int l_lshift(lua_State* L)
		{
			int a = luax_checkinteger(L, 1);
			int b = luax_checkinteger(L, 2);
			luax_pushinteger(L, a << b);
			return 1;
		}

		LUA_IMPLEMENT int l_rshift(lua_State* L)
		{
			int a = luax_checkinteger(L, 1);
			int b = luax_checkinteger(L, 2);
			luax_pushinteger(L, a >> b);
			return 1;
		}

		LUA_IMPLEMENT int l_include(lua_State* L)
		{
			int a = luax_checkinteger(L, 1);
			int b = luax_checkinteger(L, 2);
			luax_pushboolean(L, (a & b) == b);
			return 1;
		}
		
		LUA_EXPORT int luaopen_bit(lua_State* L)
		{
			luaL_Reg methods[] = {
				{ "bAnd", l_and	 },
				{ "bOr" , l_or	  },
				{ "bXor", l_xor	 },
				{ "bNot", l_not	 },
				{ "bLs",  l_lshift  },
				{ "bRs",  l_rshift  },
				{ "bInc", l_include },
				{ 0,	  0		 }
			};

			luax_newlib(L, methods);

			return 1;
		}

	} // namespace Lua
} // namespace JinEngine