chuanqi/cq2_sdk/lua-dec2/stab/lockbox/util/bit53.lua

-- local ok, e
-- ok = nil
-- if not ok then
--     ok, e = pcall(require, "bit") -- the LuaJIT one ?
-- end
-- if not ok then
--     ok, e = pcall(require, "bit32") -- Lua 5.2
-- end
-- if not ok then
--     ok, e = pcall(require, "bit.numberlua") -- for Lua 5.1, https://github.com/tst2005/lua-bit-numberlua/
-- end
-- if not ok then
--     error("no bitwise support found", 2)
-- end
-- assert(type(e) == "table", "invalid bit module")

-- -- Workaround to support Lua 5.2 bit32 API with the LuaJIT bit one
-- if e.rol and not e.lrotate then
--     e.lrotate = e.rol
-- end
-- if e.ror and not e.rrotate then
--     e.rrotate = e.ror
-- end

-- return e
local Bit = {};
Bit.bxor = function (p1,p2)
    return p1 ~ p2
end

Bit.band = function (p1,p2)
    return p1 & p2
end

Bit.bor = function (p1,p2)
    return p1 | p2
end

Bit.bnot = function (p1)
    return ~p1
end

Bit.lshift = function (p1,p2)
    return p1 << p2
end

Bit.rshift = function (p1,p2)
    return p1 >> p2
end

return Bit