box-server/common/utils/bitUtil.lua

local root = {data32 = {}}

for i = 1, 32 do
	root.data32[i] = 2 ^ (32 - i)
end

-- 数字转2进制
function root:d2b(arg)
	local tr = {}

	for i = 1, 32 do
		if arg >= self.data32[i] then
			tr[i] = 1
			arg = arg - self.data32[i]
		else
			tr[i] = 0
		end
	end

	return tr
end

-- 2进制转数字
function root:b2d(arg)
	local nr = 0
	for i = 1, 32 do
		if arg[i] == 1 then
			nr = nr + 2 ^ (32 - i)
		end
	end

	return nr
end

function root:_xor(a, b)
	local op1 = self:d2b(a)
	local op2 = self:d2b(b)
	local r = {}

	for i = 1, 32 do
		if op1[i] == op2[i] then
			r[i] = 0
		else
			r[i] = 1
		end
	end

	return self:b2d(r)
end --root:xor

function root:_and(a, b)
	local op1 = self:d2b(a)
	local op2 = self:d2b(b)
	local r = {}
	for i = 1, 32 do
		if op1[i] == 1 and op2[i] == 1 then
			r[i] = 1
		else
			r[i] = 0
		end
	end

	return self:b2d(r)
end --root:_and

function root:_or(a, b)
	local op1 = self:d2b(a)
	local op2 = self:d2b(b)
	local r = {}

	for i = 1, 32 do
		if op1[i] == 1 or op2[i] == 1 then
			r[i] = 1
		else
			r[i] = 0
		end
	end

	return self:b2d(r)
end --root:_or

function root:_not(a)
	local op1 = self:d2b(a)
	local r = {}

	for i = 1, 32 do
		if op1[i] == 1 then
			r[i] = 0
		else
			r[i] = 1
		end
	end
	return self:b2d(r)
end --root:_not

function root:_rshift(a, n)
	local op1 = self:d2b(a)
	local r = self:d2b(0)

	if n < 32 and n > 0 then
		for i = 1, n do
			for i = 31, 1, -1 do
				op1[i + 1] = op1[i]
			end
			op1[1] = 0
		end
		r = op1
	end

	return self:b2d(r)
end --root:_rshift

function root:_lshift(a, n)
	local op1 = self:d2b(a)
	local r = self:d2b(0)

	if n < 32 and n > 0 then
		for i = 1, n do
			for i = 1, 31 do
				op1[i] = op1[i + 1]
			end
			op1[32] = 0
		end
		r = op1
	end
	return self:b2d(r)
end --root:_lshift

function root:print(ta)
	local sr = ""
	for i = 1, 32 do
		sr = sr .. ta[i]
	end
end

return root