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/*
* Copyright (C) 2017 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 "WasmIndexOrName.h"
namespace JSC { namespace Wasm {
IndexOrName::IndexOrName(Index index, const Name* name)
{
static_assert(sizeof(m_index) == sizeof(m_name), "bit-tagging depends on sizes being equal");
static_assert(sizeof(m_index) == sizeof(*this), "bit-tagging depends on object being the size of the union's types");
if ((index & allTags) || (bitwise_cast<Index>(name) & allTags))
*this = IndexOrName();
else if (name)
m_name = name;
else
m_index = indexTag | index;
}
String makeString(const IndexOrName& ion)
{
if (ion.isEmpty())
return String();
if (ion.isIndex())
return String::number(ion.m_index & ~IndexOrName::indexTag);
return String(ion.m_name->data(), ion.m_name->size());
};
} } // namespace JSC::Wasm
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