aboutsummaryrefslogtreecommitdiff
path: root/src/libjin-lua/modules/bit/l_bit.cpp
blob: 43be8925608a33f939b5b336ffeeb57f6352ad37 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
#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