Lua ip to int 和 int to ip

1function _M.ipToInt( str )
2	local num = 0
3	if str and type(str)=="string" then
4		local o1,o2,o3,o4 = str:match("(%d+)%.(%d+)%.(%d+)%.(%d+)" )
5		num = 2^24*o1 + 2^16*o2 + 2^8*o3 + o4
6	end
7    return num
8end
9-- inter to ip
10function _M.intToIp( n )
11	if n then
12		n = tonumber(n)
13		local n1 = math.floor(n / (2^24)) 
14		local n2 = math.floor((n - n1*(2^24)) / (2^16))
15		local n3 = math.floor((n - n1*(2^24) - n2*(2^16)) / (2^8))
16		local n4 = math.floor((n - n1*(2^24) - n2*(2^16) - n3*(2^8)))
17    	return n1.."."..n2.."."..n3.."."..n4 
18	end
19	return "0.0.0.0"
20end