| /* |
| * Copyright (C) 2011 Research In Motion Limited. All rights reserved. |
| * Copyright (C) 2016 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #pragma once |
| |
| #include <wtf/text/StringConcatenate.h> |
| |
| namespace WTF { |
| |
| enum HexConversionMode { |
| Lowercase, |
| Uppercase |
| }; |
| |
| namespace Internal { |
| |
| const LChar lowerHexDigits[17] = "0123456789abcdef"; |
| const LChar upperHexDigits[17] = "0123456789ABCDEF"; |
| inline const LChar* hexDigitsForMode(HexConversionMode mode) |
| { |
| return mode == Lowercase ? lowerHexDigits : upperHexDigits; |
| } |
| |
| }; // namespace Internal |
| |
| template<typename T> |
| inline void appendByteAsHex(unsigned char byte, T& destination, HexConversionMode mode = Uppercase) |
| { |
| const LChar* hexDigits = Internal::hexDigitsForMode(mode); |
| destination.append(hexDigits[byte >> 4]); |
| destination.append(hexDigits[byte & 0xF]); |
| } |
| |
| template<typename T> |
| inline void placeByteAsHexCompressIfPossible(unsigned char byte, T& destination, unsigned& index, HexConversionMode mode = Uppercase) |
| { |
| const LChar* hexDigits = Internal::hexDigitsForMode(mode); |
| if (byte >= 0x10) |
| destination[index++] = hexDigits[byte >> 4]; |
| destination[index++] = hexDigits[byte & 0xF]; |
| } |
| |
| template<typename T> |
| inline void placeByteAsHex(unsigned char byte, T& destination, HexConversionMode mode = Uppercase) |
| { |
| const LChar* hexDigits = Internal::hexDigitsForMode(mode); |
| *destination++ = hexDigits[byte >> 4]; |
| *destination++ = hexDigits[byte & 0xF]; |
| } |
| |
| template<typename T> |
| inline void appendUnsignedAsHex(unsigned number, T& destination, HexConversionMode mode = Uppercase) |
| { |
| const LChar* hexDigits = Internal::hexDigitsForMode(mode); |
| Vector<LChar, 8> result; |
| do { |
| result.append(hexDigits[number % 16]); |
| number >>= 4; |
| } while (number > 0); |
| |
| result.reverse(); |
| destination.append(result.data(), result.size()); |
| } |
| |
| template<typename T> |
| inline void appendUnsigned64AsHex(uint64_t number, T& destination, HexConversionMode mode = Uppercase) |
| { |
| const LChar* hexDigits = Internal::hexDigitsForMode(mode); |
| Vector<LChar, 8> result; |
| do { |
| result.append(hexDigits[number % 16]); |
| number >>= 4; |
| } while (number > 0); |
| |
| result.reverse(); |
| destination.append(result.data(), result.size()); |
| } |
| |
| // Same as appendUnsignedAsHex, but using exactly 'desiredDigits' for the conversion. |
| template<typename T> |
| inline void appendUnsignedAsHexFixedSize(unsigned number, T& destination, unsigned desiredDigits, HexConversionMode mode = Uppercase) |
| { |
| ASSERT(desiredDigits); |
| |
| const LChar* hexDigits = Internal::hexDigitsForMode(mode); |
| Vector<LChar, 8> result; |
| do { |
| result.append(hexDigits[number % 16]); |
| number >>= 4; |
| } while (result.size() < desiredDigits); |
| |
| ASSERT(result.size() == desiredDigits); |
| result.reverse(); |
| destination.append(result.data(), result.size()); |
| } |
| |
| |
| inline bool isHexDigit(char c) |
| { |
| return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f'); |
| } |
| |
| inline char uncheckedHexDigit(int i) |
| { |
| if (i < 0 || i > 16) |
| return '0'; |
| |
| return (i >= 10) ? i - 10 + 'A' : i + '0'; |
| } |
| |
| inline bool hexDigitValue(char c, char& result) |
| { |
| if (c >= '0' && c <= '9') { |
| result = c - '0'; |
| return true; |
| } |
| |
| if (c >= 'A' && c <= 'F') { |
| result = c - 'A' + 10; |
| return true; |
| } |
| |
| if (c >= 'a' && c <= 'f') { |
| result = c - 'a' + 10; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| inline int uncheckedHexDigitValue(char c) |
| { |
| if (c >= '0' && c <= '9') |
| return c - '0'; |
| |
| if (c >= 'A' && c <= 'F') |
| return c - 'A' + 10; |
| |
| if (c >= 'a' && c <= 'f') |
| return c - 'a' + 10; |
| |
| return 0; |
| } |
| |
| } // namespace WTF |
| |
| using WTF::appendByteAsHex; |
| using WTF::appendUnsignedAsHex; |
| using WTF::appendUnsignedAsHexFixedSize; |
| using WTF::placeByteAsHex; |
| using WTF::placeByteAsHexCompressIfPossible; |
| using WTF::Lowercase; |
| using WTF::isHexDigit; |
| using WTF::uncheckedHexDigit; |
| using WTF::hexDigitValue; |
| using WTF::uncheckedHexDigitValue; |