/* * 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