#include "utf8/utf8.h"

#include <iostream>
#include <string>

using namespace std;

void show(string str) {
  cout << "calculate for [" << str << "]" << endl;
  cout << "normal size: " << str.size() << endl;
  cout << "utf-8 size: " << utf8::distance(str.begin(), str.end()) << endl;
}

std::string string_to_hex(const std::string& input) {
  static const char hex_digits[] = "0123456789ABCDEF";
  std::string output;
  output.reserve(input.length() * 2);
  for (unsigned char c : input) {
    output.push_back(hex_digits[c >> 4]);
    output.push_back(hex_digits[c & 15]);
    output.push_back(' ');
  }
  return output;
}

int main()
{
  string s = "zasiąść";
  show(s);
  // the same output as from https://mothereff.in/utf-8
  cout << string_to_hex(s) << endl;
}

/**
 * output:

calculate for [zasiąść]
normal size: 10
utf-8 size: 7
7A 61 73 69 C4 85 C5 9B C4 87 
*/
/*
 * bytes from https://mothereff.in/utf-8
\x7A\x61\x73\x69\xC4\x85\xC5\x9B\xC4\x87
*/