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52 lines
2.4 KiB
C++
52 lines
2.4 KiB
C++
/*
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* Copyright (C) 2007 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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*
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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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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY 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 OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SymbolTable_h
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#define SymbolTable_h
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#include "ustring.h"
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#include <wtf/AlwaysInline.h>
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namespace KJS {
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struct IdentifierRepHash : PtrHash<RefPtr<UString::Rep> > {
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static unsigned hash(const RefPtr<UString::Rep>& key) { return key->computedHash(); }
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static unsigned hash(UString::Rep* key) { return key->computedHash(); }
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};
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static ALWAYS_INLINE size_t missingSymbolMarker() { return std::numeric_limits<size_t>::max(); }
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struct SymbolTableIndexHashTraits : HashTraits<size_t> {
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static const bool emptyValueIsZero = false;
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static size_t emptyValue() { return missingSymbolMarker(); }
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};
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typedef HashMap<RefPtr<UString::Rep>, size_t, IdentifierRepHash, HashTraits<RefPtr<UString::Rep> >, SymbolTableIndexHashTraits> SymbolTable;
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} // namespace KJS
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#endif // SymbolTable_h
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