79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
/*
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* Copyright (C) 2019 Sony Interactive Entertainment Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "YarrFlags.h"
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#include <wtf/OptionSet.h>
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#include <wtf/text/StringView.h>
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namespace JSC { namespace Yarr {
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std::optional<OptionSet<Flags>> parseFlags(StringView string)
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{
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OptionSet<Flags> flags;
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for (auto character : string.codeUnits()) {
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switch (character) {
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#define JSC_HANDLE_REGEXP_FLAG(key, name, lowerCaseName, _) \
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case key: \
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if (flags.contains(Flags::name)) \
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return std::nullopt; \
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flags.add(Flags::name); \
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break;
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JSC_REGEXP_FLAGS(JSC_HANDLE_REGEXP_FLAG)
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#undef JSC_HANDLE_REGEXP_FLAG
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default:
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return std::nullopt;
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}
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}
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return std::make_optional(flags);
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}
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FlagsString flagsString(OptionSet<Flags> flags)
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{
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FlagsString string;
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unsigned index = 0;
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#define JSC_WRITE_REGEXP_FLAG(key, name, lowerCaseName, _) \
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do { \
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if (flags.contains(Flags::name)) \
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string[index++] = key; \
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} while (0);
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JSC_REGEXP_FLAGS(JSC_WRITE_REGEXP_FLAG)
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#undef JSC_WRITE_REGEXP_FLAG
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ASSERT(index < string.size());
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string[index] = 0;
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return string;
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}
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} } // namespace JSC::Yarr
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