1/*
2 * Copyright (C) 2007-2017 Apple, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "TextCodecUserDefined.h"
28
29#include <array>
30#include <wtf/text/CString.h>
31#include <wtf/text/StringBuilder.h>
32#include <wtf/text/WTFString.h>
33
34namespace WebCore {
35
36void TextCodecUserDefined::registerEncodingNames(EncodingNameRegistrar registrar)
37{
38 registrar("x-user-defined", "x-user-defined");
39}
40
41void TextCodecUserDefined::registerCodecs(TextCodecRegistrar registrar)
42{
43 registrar("x-user-defined", [] {
44 return std::make_unique<TextCodecUserDefined>();
45 });
46}
47
48String TextCodecUserDefined::decode(const char* bytes, size_t length, bool, bool, bool&)
49{
50 StringBuilder result;
51 result.reserveCapacity(length);
52 for (size_t i = 0; i < length; ++i) {
53 signed char c = bytes[i];
54 result.append(static_cast<UChar>(c & 0xF7FF));
55 }
56 return result.toString();
57}
58
59static Vector<uint8_t> encodeComplexUserDefined(StringView string, UnencodableHandling handling)
60{
61 Vector<uint8_t> result;
62
63 for (auto character : string.codePoints()) {
64 int8_t signedByte = character;
65 if ((signedByte & 0xF7FF) == character)
66 result.append(signedByte);
67 else {
68 // No way to encode this character with x-user-defined.
69 UnencodableReplacementArray replacement;
70 int replacementLength = TextCodec::getUnencodableReplacement(character, handling, replacement);
71 result.append(replacement.data(), replacementLength);
72 }
73 }
74
75 return result;
76}
77
78Vector<uint8_t> TextCodecUserDefined::encode(StringView string, UnencodableHandling handling)
79{
80 {
81 Vector<uint8_t> result(string.length());
82 auto* bytes = result.data();
83
84 // Convert and simultaneously do a check to see if it's all ASCII.
85 UChar ored = 0;
86 for (auto character : string.codeUnits()) {
87 *bytes++ = character;
88 ored |= character;
89 }
90
91 if (!(ored & 0xFF80))
92 return result;
93 }
94
95 // If it wasn't all ASCII, call the function that handles more-complex cases.
96 return encodeComplexUserDefined(string, handling);
97}
98
99} // namespace WebCore
100