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/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "YarrUnicodeProperties.h"
#include "Yarr.h"
#include "YarrPattern.h"
#include <string_view>
#include <wtf/text/WTFString.h>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC { namespace Yarr {
struct HashIndex {
int16_t value;
int16_t next;
};
struct HashValue {
const char* key;
int index;
};
struct HashTable {
int numberOfValues;
int indexMask;
const HashValue* values;
const HashIndex* index;
ALWAYS_INLINE int entry(WTF::String& key) const
{
int indexEntry = key.impl()->hash() & indexMask;
int valueIndex = index[indexEntry].value;
if (valueIndex == -1)
return -1;
while (true) {
if (WTF::equal(key, StringView::fromLatin1(values[valueIndex].key)))
return values[valueIndex].index;
indexEntry = index[indexEntry].next;
if (indexEntry == -1)
return -1;
valueIndex = index[indexEntry].value;
ASSERT(valueIndex != -1);
};
}
};
#include "UnicodePatternTables.h"
std::optional<BuiltInCharacterClassID> unicodeMatchPropertyValue(WTF::String unicodePropertyName, WTF::String unicodePropertyValue)
{
int propertyIndex = -1;
if (unicodePropertyName == "Script"_s || unicodePropertyName == "sc"_s)
propertyIndex = scriptHashTable.entry(unicodePropertyValue);
else if (unicodePropertyName == "Script_Extensions"_s || unicodePropertyName == "scx"_s)
propertyIndex = scriptExtensionHashTable.entry(unicodePropertyValue);
else if (unicodePropertyName == "General_Category"_s || unicodePropertyName == "gc"_s)
propertyIndex = generalCategoryHashTable.entry(unicodePropertyValue);
if (propertyIndex == -1)
return std::nullopt;
return std::optional<BuiltInCharacterClassID>(static_cast<BuiltInCharacterClassID>(static_cast<int>(BuiltInCharacterClassID::BaseUnicodePropertyID) + propertyIndex));
}
std::optional<BuiltInCharacterClassID> unicodeMatchProperty(WTF::String unicodePropertyValue, CompileMode compileMode)
{
int propertyIndex = -1;
propertyIndex = binaryPropertyHashTable.entry(unicodePropertyValue);
if (propertyIndex == -1)
propertyIndex = generalCategoryHashTable.entry(unicodePropertyValue);
if (propertyIndex == -1 && compileMode == CompileMode::UnicodeSets)
propertyIndex = sequencePropertyHashTable.entry(unicodePropertyValue);
if (propertyIndex == -1)
return std::nullopt;
return std::optional<BuiltInCharacterClassID>(static_cast<BuiltInCharacterClassID>(static_cast<int>(BuiltInCharacterClassID::BaseUnicodePropertyID) + propertyIndex));
}
std::unique_ptr<CharacterClass> createUnicodeCharacterClassFor(BuiltInCharacterClassID unicodeClassID)
{
unsigned unicodePropertyIndex = static_cast<unsigned>(unicodeClassID) - static_cast<unsigned>(BuiltInCharacterClassID::BaseUnicodePropertyID);
return createCharacterClassFunctions[unicodePropertyIndex]();
}
bool characterClassMayContainStrings(BuiltInCharacterClassID unicodeClassID)
{
unsigned unicodePropertyIndex = static_cast<unsigned>(unicodeClassID) - static_cast<unsigned>(BuiltInCharacterClassID::BaseUnicodePropertyID);
return unicodeCharacterClassMayContainStrings(unicodePropertyIndex);
}
} } // namespace JSC::Yarr
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
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