33 lines
1.0 KiB
C++
33 lines
1.0 KiB
C++
#pragma once
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#include <string>
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#include <cassert>
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namespace hex {
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inline std::string hex(const std::string& input, char beg, char end){
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assert(end - beg == 16);
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int len = input.length() * 2;
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char output[len];
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int idx = 0;
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for (char elm : input) {
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output[idx++] = static_cast<char>(beg + ((elm >> 4) & 0x0F));
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output[idx++] = static_cast<char>(beg + ((elm & 0x0F) >> 0));
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}
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return std::string(output, len);
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}
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inline std::string hex(const std::string& input){
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size_t len = input.length() * 2;
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char output[len];
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size_t idx = 0;
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for (char elm : input) {
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auto lower = ((uint8_t) elm >> 4U) & 0xFU;
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auto upper = ((uint8_t) elm & 0xFU) >> 0U;
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output[idx++] = static_cast<char>(lower > 9 ? 'a' + (lower - 9) : '0' + lower);
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output[idx++] = static_cast<char>(upper > 9 ? 'a' + (upper - 9) : '0' + upper);
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}
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return std::string(output, len);
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}
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} |