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/*
* Copyright 2017 The Native Object Protocols Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef LIBNOP_EXAMPLES_STRING_TO_HEX_H_
#define LIBNOP_EXAMPLES_STRING_TO_HEX_H_
#include <string>
namespace nop {
// Convertx the bytes of a string to a hexadecimal string.
std::string StringToHex(const std::string& input) {
static const char* const lut = "0123456789ABCDEF";
const size_t len = input.length();
std::string output;
output.reserve(2 * len);
for (size_t i = 0; i < len; ++i) {
const unsigned char c = input[i];
output.push_back(lut[c >> 4]);
output.push_back(lut[c & 15]);
if (i < len - 1)
output.push_back(' ');
}
return output;
}
} // namespace nop
#endif // LIBNOP_EXAMPLES_STRING_TO_HEX_H_
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