| /* |
| * 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_HEX_NUMBER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_HEX_NUMBER_H_ |
| |
| #include "third_party/blink/renderer/platform/wtf/text/string_concatenate.h" |
| |
| namespace WTF { |
| |
| namespace internal { |
| |
| const LChar kLowerHexDigits[17] = "0123456789abcdef"; |
| const LChar kUpperHexDigits[17] = "0123456789ABCDEF"; |
| |
| } // namespace internal |
| |
| class HexNumber final { |
| STATIC_ONLY(HexNumber); |
| |
| public: |
| enum HexConversionMode { kLowercase, kUppercase }; |
| |
| template <typename T> |
| static inline void AppendByteAsHex(unsigned char byte, |
| T& destination, |
| HexConversionMode mode = kUppercase) { |
| const LChar* hex_digits = HexDigitsForMode(mode); |
| destination.Append(hex_digits[byte >> 4]); |
| destination.Append(hex_digits[byte & 0xF]); |
| } |
| |
| static inline void AppendByteAsHex(unsigned char byte, |
| Vector<LChar>& destination, |
| HexConversionMode mode = kUppercase) { |
| const LChar* hex_digits = HexDigitsForMode(mode); |
| destination.push_back(hex_digits[byte >> 4]); |
| destination.push_back(hex_digits[byte & 0xF]); |
| } |
| |
| static inline void AppendByteAsHex(unsigned char byte, |
| Vector<char>& destination, |
| HexConversionMode mode = kUppercase) { |
| const LChar* hex_digits = HexDigitsForMode(mode); |
| destination.push_back(hex_digits[byte >> 4]); |
| destination.push_back(hex_digits[byte & 0xF]); |
| } |
| |
| template <typename T> |
| static inline void AppendUnsignedAsHex(unsigned number, |
| T& destination, |
| HexConversionMode mode = kUppercase) { |
| const LChar* hex_digits = HexDigitsForMode(mode); |
| Vector<LChar, 8> result; |
| do { |
| result.push_front(hex_digits[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> |
| static inline void AppendUnsignedAsHexFixedSize( |
| unsigned number, |
| T& destination, |
| unsigned desired_digits, |
| HexConversionMode mode = kUppercase) { |
| DCHECK(desired_digits); |
| |
| const LChar* hex_digits = HexDigitsForMode(mode); |
| Vector<LChar, 8> result; |
| do { |
| result.push_front(hex_digits[number % 16]); |
| number >>= 4; |
| } while (result.size() < desired_digits); |
| |
| DCHECK_EQ(result.size(), desired_digits); |
| destination.Append(result.data(), result.size()); |
| } |
| |
| private: |
| static inline const LChar* HexDigitsForMode(HexConversionMode mode) { |
| return mode == kLowercase ? internal::kLowerHexDigits |
| : internal::kUpperHexDigits; |
| } |
| }; |
| |
| } // namespace WTF |
| |
| using WTF::HexNumber; |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_HEX_NUMBER_H_ |