mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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61 lines
2.5 KiB
C++
61 lines
2.5 KiB
C++
/*
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* Copyright (C) 2018 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 "JSImmutableButterfly.h"
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#include "ButterflyInlines.h"
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namespace JSC {
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const ClassInfo JSImmutableButterfly::s_info = { "Immutable Butterfly", nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(JSImmutableButterfly) };
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void JSImmutableButterfly::visitChildren(JSCell* cell, SlotVisitor& visitor)
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{
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ASSERT_GC_OBJECT_INHERITS(cell, info());
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Base::visitChildren(cell, visitor);
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if (!hasContiguous(cell->indexingType())) {
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ASSERT(hasDouble(cell->indexingType()) || hasInt32(cell->indexingType()));
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return;
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}
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Butterfly* butterfly = jsCast<JSImmutableButterfly*>(cell)->toButterfly();
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visitor.appendValuesHidden(butterfly->contiguous().data(), butterfly->publicLength());
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}
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void JSImmutableButterfly::copyToArguments(JSGlobalObject*, JSValue* firstElementDest, unsigned offset, unsigned length)
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{
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for (unsigned i = 0; i < length; ++i) {
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if ((i + offset) < publicLength())
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firstElementDest[i] = get(i + offset);
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else
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firstElementDest[i] = jsUndefined();
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}
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}
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static_assert(JSImmutableButterfly::offsetOfData() == sizeof(JSImmutableButterfly), "m_header needs to be adjacent to Data");
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} // namespace JSC
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