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 | |
32 | namespace 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 | |