1/* 2 * Copyright (C) 2009 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef IdentifierRep_h 27#define IdentifierRep_h 28 29#include <wtf/Assertions.h> 30#include <wtf/FastMalloc.h> 31#include <wtf/StringExtras.h> 32#include <string.h> 33 34namespace WebCore { 35 36class IdentifierRep { 37 WTF_MAKE_FAST_ALLOCATED; 38public: 39 static IdentifierRep* get(int); 40 static IdentifierRep* get(const char*); 41 42 static bool isValid(IdentifierRep*); 43 44 bool isString() const { return m_isString; } 45 46 int number() const { return m_isString ? 0 : m_value.m_number; } 47 const char* string() const { return m_isString ? m_value.m_string : 0; } 48 49private: 50 explicit IdentifierRep(int number) 51 : m_isString(false) 52 { 53 m_value.m_number = number; 54 } 55 56 explicit IdentifierRep(const char* name) 57 : m_isString(true) 58 { 59 m_value.m_string = fastStrDup(name); 60 } 61 62 ~IdentifierRep(); // Not implemented 63 64 union { 65 const char* m_string; 66 int m_number; 67 } m_value; 68 bool m_isString; 69}; 70 71} // namespace WebCore 72 73#endif // IdentifierRep_h 74