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#pragma once
27
28#include <wtf/Assertions.h>
29#include <wtf/FastMalloc.h>
30#include <string.h>
31
32namespace WebCore {
33
34class IdentifierRep {
35 WTF_MAKE_FAST_ALLOCATED;
36public:
37 WEBCORE_EXPORT static IdentifierRep* get(int);
38 WEBCORE_EXPORT static IdentifierRep* get(const char*);
39
40 WEBCORE_EXPORT static bool isValid(IdentifierRep*);
41
42 bool isString() const { return m_isString; }
43
44 int number() const { return m_isString ? 0 : m_value.m_number; }
45 const char* string() const { return m_isString ? m_value.m_string : 0; }
46
47private:
48 explicit IdentifierRep(int number)
49 : m_isString(false)
50 {
51 m_value.m_number = number;
52 }
53
54 explicit IdentifierRep(const char* name)
55 : m_isString(true)
56 {
57 m_value.m_string = fastStrDup(name);
58 }
59
60 ~IdentifierRep(); // Not implemented
61
62 union {
63 const char* m_string;
64 int m_number;
65 } m_value;
66 bool m_isString;
67};
68
69} // namespace WebCore
70
71