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/*
* Copyright (C) 2021 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 "JSONAtomStringCache.h"
#include "SmallStrings.h"
#include "VM.h"
namespace JSC {
template<typename CharacterType>
ALWAYS_INLINE Ref<AtomStringImpl> JSONAtomStringCache::make(Type type, const CharacterType* characters, unsigned length)
{
if (!length)
return *static_cast<AtomStringImpl*>(StringImpl::empty());
auto firstCharacter = characters[0];
if (length == 1) {
if (firstCharacter <= maxSingleCharacterString)
return vm().smallStrings.singleCharacterStringRep(firstCharacter);
} else if (length > maxStringLengthForCache)
return AtomStringImpl::add(characters, length).releaseNonNull();
auto lastCharacter = characters[length - 1];
auto& slot = cacheSlot(type, firstCharacter, lastCharacter, length);
if (!equal(slot.get(), characters, length)) {
auto result = AtomStringImpl::add(characters, length);
slot = result;
return result.releaseNonNull();
}
return *slot;
}
ALWAYS_INLINE VM& JSONAtomStringCache::vm() const
{
return *bitwise_cast<VM*>(bitwise_cast<uintptr_t>(this) - OBJECT_OFFSETOF(VM, jsonAtomStringCache));
}
} // namespace JSC
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