hex_codec.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "flutter/fml/base32.h"
 
#include <cstdint>  // uint8_t
#include <string>
 
namespace fml {
 
static constexpr char kEncoding[] = "0123456789abcdef";
 
std::string HexEncode(std::string_view input) {
  std::string result;
  result.reserve(input.size() * 2);
  for (char c : input) {
    uint8_t b = static_cast<uint8_t>(c);
    result.push_back(kEncoding[b >> 4]);
    result.push_back(kEncoding[b & 0xF]);
  }
  return result;
}
 
}  // namespace fml