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/*
* Copyright (C) 2019 Sony Interactive Entertainment Inc.
*
* 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. AND ITS CONTRIBUTORS ``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 ITS 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 "YarrFlags.h"
#include <wtf/OptionSet.h>
#include <wtf/text/StringView.h>
namespace JSC { namespace Yarr {
std::optional<OptionSet<Flags>> parseFlags(StringView string)
{
OptionSet<Flags> flags;
for (auto character : string.codeUnits()) {
switch (character) {
#define JSC_HANDLE_REGEXP_FLAG(key, name, lowerCaseName, _) \
case key: \
if (flags.contains(Flags::name)) \
return std::nullopt; \
flags.add(Flags::name); \
break;
JSC_REGEXP_FLAGS(JSC_HANDLE_REGEXP_FLAG)
#undef JSC_HANDLE_REGEXP_FLAG
default:
return std::nullopt;
}
}
// Can only specify one of 'u' and 'v' flags.
if (flags.contains(Flags::Unicode) && flags.contains(Flags::UnicodeSets))
return std::nullopt;
return std::make_optional(flags);
}
FlagsString flagsString(OptionSet<Flags> flags)
{
FlagsString string;
unsigned index = 0;
#define JSC_WRITE_REGEXP_FLAG(key, name, lowerCaseName, _) \
do { \
if (flags.contains(Flags::name)) \
string[index++] = key; \
} while (0);
JSC_REGEXP_FLAGS(JSC_WRITE_REGEXP_FLAG)
#undef JSC_WRITE_REGEXP_FLAG
ASSERT(index < string.size());
string[index] = 0;
return string;
}
} } // namespace JSC::Yarr
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