#pragma once

#include <string>
#include <cassert>

namespace hex {
	inline std::string hex(const std::string& input, char beg, char end){
		assert(end - beg  == 16);

		int len = input.length() * 2;
		char output[len];
		int idx = 0;
		for (char elm : input) {
			output[idx++] = static_cast<char>(beg + ((elm >> 4) & 0x0F));
			output[idx++] = static_cast<char>(beg + ((elm & 0x0F) >> 0));
		}

		return std::string(output, len);
	}
}