#ip #parse_ip

parseIP.cpp

#include <string>
#include <sstream>
#include <iostream>

int getIP(std::string ip_str) {
    if (ip_str.empty()) {
        return 0;
    }

    std::stringstream ss(ip_str);
    char delimeter;
    int val[4];
    ss >>val[3] >>delimeter >>val[2] >>delimeter >>val[1] >>delimeter >>val[0];
    return ((val[3] << 24) | (val[2] << 16) | (val[1] << 8) | val[0]);
}

std::string getIP(int ip_num) {
    int val[4];
    val[3] = (ip_num >> 24) & 0xFF;
    val[2] = (ip_num >>16) & 0xFF;
    val[1] = (ip_num >> 8) & 0xFF;
    val[0] = (ip_num) & 0xFF;
    return (std::to_string(val[3]) + std::string(".") + std::to_string(val[2]) + std::string(".") + std::to_string(val[1]) + std::string(".") + std::to_string(val[0]));
}

int main() {
    std::string ip_str = "10.100.1.19";
    auto ip_num = getIP(ip_str);
    std::cout <<ip_num <<", " <<getIP(ip_num) <<std::endl;
    return 0;
}