1/*
2 * Copyright (C) 2008, 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 SmallStrings_h
27#define SmallStrings_h
28
29#include "UString.h"
30#include <wtf/OwnPtr.h>
31
32namespace JSC {
33
34 class JSGlobalData;
35 class JSString;
36 class MarkStack;
37 class SmallStringsStorage;
38
39 class SmallStrings : public Noncopyable {
40 public:
41 SmallStrings();
42 ~SmallStrings();
43
44 JSString* emptyString(JSGlobalData* globalData)
45 {
46 if (!m_emptyString)
47 createEmptyString(globalData);
48 return m_emptyString;
49 }
50 JSString* singleCharacterString(JSGlobalData* globalData, unsigned char character)
51 {
52 if (!m_singleCharacterStrings[character])
53 createSingleCharacterString(globalData, character);
54 return m_singleCharacterStrings[character];
55 }
56
57 UString::Rep* singleCharacterStringRep(unsigned char character);
58
59 void markChildren(MarkStack&);
60
61 unsigned count() const;
62
63 private:
64 void createEmptyString(JSGlobalData*);
65 void createSingleCharacterString(JSGlobalData*, unsigned char);
66
67 JSString* m_emptyString;
68 JSString* m_singleCharacterStrings[0x100];
69 OwnPtr<SmallStringsStorage> m_storage;
70 };
71
72} // namespace JSC
73
74#endif // SmallStrings_h
75

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/runtime/SmallStrings.h