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/*
* Copyright (C) 2023 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. 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.
*/
#pragma once
#include "Identifier.h"
#include "KeyAtomStringCache.h"
#include "SmallStrings.h"
#include "VM.h"
namespace JSC {
template<typename Buffer, typename Func>
ALWAYS_INLINE JSString* KeyAtomStringCache::make(VM& vm, Buffer& buffer, const Func& func)
{
if (buffer.characters.empty())
return jsEmptyString(vm);
if (buffer.characters.size() == 1) {
auto firstCharacter = buffer.characters[0];
if (firstCharacter <= maxSingleCharacterString)
return vm.smallStrings.singleCharacterString(firstCharacter);
}
ASSERT(buffer.characters.size() <= maxStringLengthForCache);
auto& slot = m_cache[buffer.hash % capacity];
if (slot) {
auto* impl = slot->tryGetValueImpl();
if (impl->hash() == buffer.hash && equal(impl, buffer.characters))
return slot;
}
JSString* result = func(vm, buffer);
if (LIKELY(result))
slot = result;
return result;
}
} // namespace JSC
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