1 #pragma once
2 
3 #include <array>
4 #include <cstddef>
5 #include <string>
6 
7 template <typename IntegerType>
8 inline std::string intToHexString(IntegerType value,
9                                   size_t digits = sizeof(IntegerType) << 1)
10 {
11     static constexpr std::array<char, 16> digitsArray = {
12         '0', '1', '2', '3', '4', '5', '6', '7',
13         '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
14     std::string rc(digits, '0');
15     size_t bitIndex = (digits - 1) * 4;
16     for (size_t digitIndex = 0; digitIndex < digits; digitIndex++)
17     {
18         rc[digitIndex] = digitsArray[(value >> bitIndex) & 0x0f];
19         bitIndex -= 4;
20     }
21     return rc;
22 }
23