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Side by Side Diff: third_party/WebKit/Source/wtf/text/TextCodec.h

Issue 2764283002: Move files in wtf/ to platform/wtf/ (Part 10). (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) 2004, 2006 Apple Computer, Inc. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be
3 * Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com> 3 // found in the LICENSE file.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26 4
27 #ifndef TextCodec_h 5 #include "platform/wtf/text/TextCodec.h"
28 #define TextCodec_h
29 6
30 #include "wtf/Forward.h" 7 // The contents of this header was moved to platform/wtf as part of
31 #include "wtf/Noncopyable.h" 8 // WTF migration project. See the following post for details:
32 #include "wtf/text/Unicode.h" 9 // https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gY CAAJ
33 #include "wtf/text/WTFString.h"
34 #include <memory>
35
36 namespace WTF {
37
38 class TextEncoding;
39
40 // Specifies what will happen when a character is encountered that is
41 // not encodable in the character set.
42 enum UnencodableHandling {
43 // Substitutes the replacement character "?".
44 QuestionMarksForUnencodables,
45
46 // Encodes the character as an XML entity. For example, U+06DE
47 // would be "&#1758;" (0x6DE = 1758 in octal).
48 EntitiesForUnencodables,
49
50 // Encodes the character as en entity as above, but escaped
51 // non-alphanumeric characters. This is used in URLs.
52 // For example, U+6DE would be "%26%231758%3B".
53 URLEncodedEntitiesForUnencodables,
54
55 // Encodes the character as a CSS entity. For example U+06DE
56 // would be \06de. See: https://www.w3.org/TR/css-syntax-3/#escaping
57 CSSEncodedEntitiesForUnencodables,
58 };
59
60 typedef char UnencodableReplacementArray[32];
61
62 enum FlushBehavior {
63 // More bytes are coming, don't flush the codec.
64 DoNotFlush = 0,
65
66 // A fetch has hit EOF. Some codecs handle fetches differently, for compat
67 // reasons.
68 FetchEOF,
69
70 // Do a full flush of the codec.
71 DataEOF
72 };
73
74 static_assert(!DoNotFlush, "DoNotFlush should be falsy");
75 static_assert(FetchEOF, "FetchEOF should be truthy");
76 static_assert(DataEOF, "DataEOF should be truthy");
77
78 class WTF_EXPORT TextCodec {
79 WTF_MAKE_NONCOPYABLE(TextCodec);
80 USING_FAST_MALLOC(TextCodec);
81
82 public:
83 TextCodec() {}
84 virtual ~TextCodec();
85
86 String decode(const char* str,
87 size_t length,
88 FlushBehavior flush = DoNotFlush) {
89 bool ignored;
90 return decode(str, length, flush, false, ignored);
91 }
92
93 virtual String decode(const char*,
94 size_t length,
95 FlushBehavior,
96 bool stopOnError,
97 bool& sawError) = 0;
98 virtual CString encode(const UChar*, size_t length, UnencodableHandling) = 0;
99 virtual CString encode(const LChar*, size_t length, UnencodableHandling) = 0;
100
101 // Fills a null-terminated string representation of the given
102 // unencodable character into the given replacement buffer.
103 // The length of the string (not including the null) will be returned.
104 static int getUnencodableReplacement(unsigned codePoint,
105 UnencodableHandling,
106 UnencodableReplacementArray);
107 };
108
109 typedef void (*EncodingNameRegistrar)(const char* alias, const char* name);
110
111 typedef std::unique_ptr<TextCodec> (
112 *NewTextCodecFunction)(const TextEncoding&, const void* additionalData);
113 typedef void (*TextCodecRegistrar)(const char* name,
114 NewTextCodecFunction,
115 const void* additionalData);
116
117 } // namespace WTF
118
119 using WTF::TextCodec;
120
121 #endif // TextCodec_h
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