1/*
2 * Copyright (C) 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 "YarrUnicodeProperties.h"
28
29#include "Yarr.h"
30#include "YarrPattern.h"
31#include <wtf/Optional.h>
32#include <wtf/text/WTFString.h>
33
34namespace JSC { namespace Yarr {
35
36struct HashIndex {
37 int16_t value;
38 int16_t next;
39};
40
41struct HashValue {
42 const char* key;
43 int index;
44};
45
46struct HashTable {
47 int numberOfValues;
48 int indexMask;
49 const HashValue* values;
50 const HashIndex* index;
51
52 ALWAYS_INLINE int entry(WTF::String& key) const
53 {
54 int indexEntry = key.impl()->hash() & indexMask;
55 int valueIndex = index[indexEntry].value;
56
57 if (valueIndex == -1)
58 return -1;
59
60 while (true) {
61 if (WTF::equal(key, values[valueIndex].key))
62 return values[valueIndex].index;
63
64 indexEntry = index[indexEntry].next;
65 if (indexEntry == -1)
66 return -1;
67 valueIndex = index[indexEntry].value;
68 ASSERT(valueIndex != -1);
69 };
70 }
71};
72
73#include "UnicodePatternTables.h"
74
75Optional<BuiltInCharacterClassID> unicodeMatchPropertyValue(WTF::String unicodePropertyName, WTF::String unicodePropertyValue)
76{
77 int propertyIndex = -1;
78
79 if (unicodePropertyName == "Script" || unicodePropertyName == "sc")
80 propertyIndex = scriptHashTable.entry(unicodePropertyValue);
81 else if (unicodePropertyName == "Script_Extensions" || unicodePropertyName == "scx")
82 propertyIndex = scriptExtensionHashTable.entry(unicodePropertyValue);
83 else if (unicodePropertyName == "General_Category" || unicodePropertyName == "gc")
84 propertyIndex = generalCategoryHashTable.entry(unicodePropertyValue);
85
86 if (propertyIndex == -1)
87 return WTF::nullopt;
88
89 return Optional<BuiltInCharacterClassID>(static_cast<BuiltInCharacterClassID>(static_cast<int>(BuiltInCharacterClassID::BaseUnicodePropertyID) + propertyIndex));
90}
91
92Optional<BuiltInCharacterClassID> unicodeMatchProperty(WTF::String unicodePropertyValue)
93{
94 int propertyIndex = -1;
95
96 propertyIndex = binaryPropertyHashTable.entry(unicodePropertyValue);
97 if (propertyIndex == -1)
98 propertyIndex = generalCategoryHashTable.entry(unicodePropertyValue);
99
100 if (propertyIndex == -1)
101 return WTF::nullopt;
102
103 return Optional<BuiltInCharacterClassID>(static_cast<BuiltInCharacterClassID>(static_cast<int>(BuiltInCharacterClassID::BaseUnicodePropertyID) + propertyIndex));
104}
105
106std::unique_ptr<CharacterClass> createUnicodeCharacterClassFor(BuiltInCharacterClassID unicodeClassID)
107{
108 unsigned unicodePropertyIndex = static_cast<unsigned>(unicodeClassID) - static_cast<unsigned>(BuiltInCharacterClassID::BaseUnicodePropertyID);
109
110 return createFunctions[unicodePropertyIndex]();
111}
112
113} } // namespace JSC::Yarr
114