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/*
* Copyright (C) 2018-2021 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. ``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
* 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 "JSImmutableButterfly.h"
#include "ButterflyInlines.h"
namespace JSC {
const ClassInfo JSImmutableButterfly::s_info = { "Immutable Butterfly"_s, nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(JSImmutableButterfly) };
template<typename Visitor>
void JSImmutableButterfly::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
ASSERT_GC_OBJECT_INHERITS(cell, info());
Base::visitChildren(cell, visitor);
if (!hasContiguous(cell->indexingType())) {
ASSERT(hasDouble(cell->indexingType()) || hasInt32(cell->indexingType()));
return;
}
Butterfly* butterfly = jsCast<JSImmutableButterfly*>(cell)->toButterfly();
visitor.appendValuesHidden(butterfly->contiguous().data(), butterfly->publicLength());
}
DEFINE_VISIT_CHILDREN(JSImmutableButterfly);
void JSImmutableButterfly::copyToArguments(JSGlobalObject*, JSValue* firstElementDest, unsigned offset, unsigned length)
{
for (unsigned i = 0; i < length; ++i) {
if ((i + offset) < publicLength())
firstElementDest[i] = get(i + offset);
else
firstElementDest[i] = jsUndefined();
}
}
static_assert(JSImmutableButterfly::offsetOfData() == sizeof(JSImmutableButterfly), "m_header needs to be adjacent to Data");
} // namespace JSC
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