mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-09 02:10:43 +00:00
129 lines
4.3 KiB
C++
129 lines
4.3 KiB
C++
/*
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* Copyright (C) 2015-2020 Apple Inc. All rights reserved.
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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. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ScopedArgumentsTable.h"
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#include "JSCJSValueInlines.h"
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#include "JSObjectInlines.h"
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#include "StructureInlines.h"
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namespace JSC {
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const ClassInfo ScopedArgumentsTable::s_info = { "ScopedArgumentsTable", nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(ScopedArgumentsTable) };
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ScopedArgumentsTable::ScopedArgumentsTable(VM& vm)
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: Base(vm, vm.scopedArgumentsTableStructure.get())
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, m_length(0)
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, m_locked(false)
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{
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}
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ScopedArgumentsTable::~ScopedArgumentsTable()
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{
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}
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void ScopedArgumentsTable::destroy(JSCell* cell)
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{
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static_cast<ScopedArgumentsTable*>(cell)->ScopedArgumentsTable::~ScopedArgumentsTable();
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}
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ScopedArgumentsTable* ScopedArgumentsTable::create(VM& vm)
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{
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ScopedArgumentsTable* result =
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new (NotNull, allocateCell<ScopedArgumentsTable>(vm.heap)) ScopedArgumentsTable(vm);
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result->finishCreation(vm);
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return result;
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}
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ScopedArgumentsTable* ScopedArgumentsTable::tryCreate(VM& vm, uint32_t length)
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{
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void* buffer = tryAllocateCell<ScopedArgumentsTable>(vm.heap);
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if (UNLIKELY(!buffer))
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return nullptr;
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ScopedArgumentsTable* result = new (NotNull, buffer) ScopedArgumentsTable(vm);
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result->finishCreation(vm);
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result->m_length = length;
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result->m_arguments = ArgumentsPtr::tryCreate(length);
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if (UNLIKELY(!result->m_arguments))
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return nullptr;
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return result;
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}
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ScopedArgumentsTable* ScopedArgumentsTable::tryClone(VM& vm)
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{
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ScopedArgumentsTable* result = tryCreate(vm, m_length);
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if (UNLIKELY(!result))
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return nullptr;
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for (unsigned i = m_length; i--;)
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result->at(i) = this->at(i);
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return result;
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}
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ScopedArgumentsTable* ScopedArgumentsTable::trySetLength(VM& vm, uint32_t newLength)
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{
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if (LIKELY(!m_locked)) {
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ArgumentsPtr newArguments = ArgumentsPtr::tryCreate(newLength, newLength);
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if (UNLIKELY(!newArguments))
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return nullptr;
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for (unsigned i = std::min(m_length, newLength); i--;)
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newArguments.at(i, newLength) = this->at(i);
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m_length = newLength;
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m_arguments = WTFMove(newArguments);
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return this;
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}
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ScopedArgumentsTable* result = tryCreate(vm, newLength);
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if (UNLIKELY(!result))
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return nullptr;
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for (unsigned i = std::min(m_length, newLength); i--;)
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result->at(i) = this->at(i);
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return result;
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}
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static_assert(std::is_trivially_destructible<ScopeOffset>::value, "");
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ScopedArgumentsTable* ScopedArgumentsTable::trySet(VM& vm, uint32_t i, ScopeOffset value)
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{
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ScopedArgumentsTable* result;
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if (UNLIKELY(m_locked)) {
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result = tryClone(vm);
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if (UNLIKELY(!result))
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return nullptr;
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} else
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result = this;
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result->at(i) = value;
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return result;
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}
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Structure* ScopedArgumentsTable::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
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{
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return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
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}
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} // namespace JSC
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