| /* |
| * Copyright (C) 2011 Research In Motion Limited. 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. |
| */ |
| |
| #ifndef HexNumber_h |
| #define HexNumber_h |
| |
| #include <wtf/text/StringConcatenate.h> |
| |
| namespace WTF { |
| |
| enum HexConversionMode { |
| Lowercase, |
| Uppercase |
| }; |
| |
| namespace Internal { |
| |
| const char lowerHexDigits[17] = "0123456789abcdef"; |
| const char upperHexDigits[17] = "0123456789ABCDEF"; |
| inline const char* 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 char* 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 char* 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 char* 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 char* hexDigits = Internal::hexDigitsForMode(mode); |
| Vector<UChar, 8> result; |
| do { |
| result.prepend(hexDigits[number % 16]); |
| number >>= 4; |
| } while (number > 0); |
| |
| 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 char* hexDigits = Internal::hexDigitsForMode(mode); |
| Vector<UChar, 8> result; |
| do { |
| result.prepend(hexDigits[number % 16]); |
| number >>= 4; |
| } while (result.size() < desiredDigits); |
| |
| ASSERT(result.size() == desiredDigits); |
| destination.append(result.data(), result.size()); |
| } |
| |
| } // namespace WTF |
| |
| using WTF::appendByteAsHex; |
| using WTF::appendUnsignedAsHex; |
| using WTF::appendUnsignedAsHexFixedSize; |
| using WTF::placeByteAsHex; |
| using WTF::placeByteAsHexCompressIfPossible; |
| using WTF::Lowercase; |
| |
| #endif // HexNumber_h |