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Side by Side Diff: third_party/WebKit/Source/wtf/HexNumber.h

Issue 2764243002: Move files in wtf/ to platform/wtf/ (Part 9). (Closed)
Patch Set: Rebase. Created 3 years, 9 months ago
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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
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