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59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/base/hex_utils.h"
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#include <algorithm>
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#include <cstdint>
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#include <vector>
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#include "base/strings/string_number_conversions.h"
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#include "base/strings/stringprintf.h"
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namespace net {
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std::string HexDecode(base::StringPiece input) {
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std::vector<uint8_t> output;
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std::string result;
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if (base::HexStringToBytes(input, &output))
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result.assign(reinterpret_cast<const char*>(&output[0]), output.size());
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return result;
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}
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std::string HexDump(base::StringPiece input) {
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const int kBytesPerLine = 16; // Maximum bytes dumped per line.
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int offset = 0;
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const char* buf = input.data();
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int bytes_remaining = input.size();
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std::string output;
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const char* p = buf;
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while (bytes_remaining > 0) {
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const int line_bytes = std::min(bytes_remaining, kBytesPerLine);
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base::StringAppendF(&output, "0x%04x: ", offset);
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for (int i = 0; i < kBytesPerLine; ++i) {
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if (i < line_bytes) {
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base::StringAppendF(&output, "%02x", static_cast<unsigned char>(p[i]));
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} else {
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output += " ";
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}
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if (i % 2) {
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output += ' ';
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}
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}
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output += ' ';
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for (int i = 0; i < line_bytes; ++i) {
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// Replace non-printable characters and 0x20 (space) with '.'
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output += (p[i] > 0x20 && p[i] < 0x7f) ? p[i] : '.';
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}
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bytes_remaining -= line_bytes;
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offset += line_bytes;
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p += line_bytes;
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output += '\n';
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}
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return output;
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}
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} // namespace net
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