OLD | NEW |
1 /* | 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
2 * Copyright (C) 2011 Research In Motion Limited. All rights reserved. | 2 // Use of this source code is governed by a BSD-style license that can be |
3 * | 3 // found in the LICENSE file. |
4 * This library is free software; you can redistribute it and/or | |
5 * modify it under the terms of the GNU Library General Public | |
6 * License as published by the Free Software Foundation; either | |
7 * version 2 of the License, or (at your option) any later version. | |
8 * | |
9 * This library is distributed in the hope that it will be useful, | |
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 * Library General Public License for more details. | |
13 * | |
14 * You should have received a copy of the GNU Library General Public License | |
15 * along with this library; see the file COPYING.LIB. If not, write to | |
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
17 * Boston, MA 02110-1301, USA. | |
18 */ | |
19 | 4 |
20 #ifndef HexNumber_h | 5 #include "platform/wtf/HexNumber.h" |
21 #define HexNumber_h | |
22 | 6 |
23 #include "wtf/text/StringConcatenate.h" | 7 // The contents of this header was moved to platform/wtf as part of |
24 | 8 // WTF migration project. See the following post for details: |
25 namespace WTF { | 9 // https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gY
CAAJ |
26 | |
27 namespace Internal { | |
28 | |
29 const LChar lowerHexDigits[17] = "0123456789abcdef"; | |
30 const LChar upperHexDigits[17] = "0123456789ABCDEF"; | |
31 | |
32 } // namespace Internal | |
33 | |
34 class HexNumber final { | |
35 STATIC_ONLY(HexNumber); | |
36 | |
37 public: | |
38 enum HexConversionMode { Lowercase, Uppercase }; | |
39 | |
40 template <typename T> | |
41 static inline void appendByteAsHex(unsigned char byte, | |
42 T& destination, | |
43 HexConversionMode mode = Uppercase) { | |
44 const LChar* hexDigits = hexDigitsForMode(mode); | |
45 destination.append(hexDigits[byte >> 4]); | |
46 destination.append(hexDigits[byte & 0xF]); | |
47 } | |
48 | |
49 static inline void appendByteAsHex(unsigned char byte, | |
50 Vector<LChar>& destination, | |
51 HexConversionMode mode = Uppercase) { | |
52 const LChar* hexDigits = hexDigitsForMode(mode); | |
53 destination.push_back(hexDigits[byte >> 4]); | |
54 destination.push_back(hexDigits[byte & 0xF]); | |
55 } | |
56 | |
57 static inline void appendByteAsHex(unsigned char byte, | |
58 Vector<char>& destination, | |
59 HexConversionMode mode = Uppercase) { | |
60 const LChar* hexDigits = hexDigitsForMode(mode); | |
61 destination.push_back(hexDigits[byte >> 4]); | |
62 destination.push_back(hexDigits[byte & 0xF]); | |
63 } | |
64 | |
65 template <typename T> | |
66 static inline void appendUnsignedAsHex(unsigned number, | |
67 T& destination, | |
68 HexConversionMode mode = Uppercase) { | |
69 const LChar* hexDigits = hexDigitsForMode(mode); | |
70 Vector<LChar, 8> result; | |
71 do { | |
72 result.push_front(hexDigits[number % 16]); | |
73 number >>= 4; | |
74 } while (number > 0); | |
75 | |
76 destination.append(result.data(), result.size()); | |
77 } | |
78 | |
79 // Same as appendUnsignedAsHex, but using exactly 'desiredDigits' for the | |
80 // conversion. | |
81 template <typename T> | |
82 static inline void appendUnsignedAsHexFixedSize( | |
83 unsigned number, | |
84 T& destination, | |
85 unsigned desiredDigits, | |
86 HexConversionMode mode = Uppercase) { | |
87 DCHECK(desiredDigits); | |
88 | |
89 const LChar* hexDigits = hexDigitsForMode(mode); | |
90 Vector<LChar, 8> result; | |
91 do { | |
92 result.push_front(hexDigits[number % 16]); | |
93 number >>= 4; | |
94 } while (result.size() < desiredDigits); | |
95 | |
96 DCHECK_EQ(result.size(), desiredDigits); | |
97 destination.append(result.data(), result.size()); | |
98 } | |
99 | |
100 private: | |
101 static inline const LChar* hexDigitsForMode(HexConversionMode mode) { | |
102 return mode == Lowercase ? Internal::lowerHexDigits | |
103 : Internal::upperHexDigits; | |
104 } | |
105 }; | |
106 | |
107 } // namespace WTF | |
108 | |
109 using WTF::HexNumber; | |
110 | |
111 #endif // HexNumber_h | |
OLD | NEW |