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1 /* | |
2 * Copyright (C) 2010 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 #include "wtf/text/StringStatics.h" | |
27 | |
28 #include "wtf/DynamicAnnotations.h" | |
29 #include "wtf/StaticConstructors.h" | |
30 #include "wtf/text/AtomicString.h" | |
31 #include "wtf/text/StringImpl.h" | |
32 | |
33 namespace WTF { | |
34 | |
35 WTF_EXPORT DEFINE_GLOBAL(AtomicString, nullAtom); | |
36 WTF_EXPORT DEFINE_GLOBAL(AtomicString, emptyAtom); | |
37 WTF_EXPORT DEFINE_GLOBAL(AtomicString, starAtom); | |
38 WTF_EXPORT DEFINE_GLOBAL(AtomicString, xmlAtom); | |
39 WTF_EXPORT DEFINE_GLOBAL(AtomicString, xmlnsAtom); | |
40 WTF_EXPORT DEFINE_GLOBAL(AtomicString, xlinkAtom); | |
41 WTF_EXPORT DEFINE_GLOBAL(AtomicString, httpAtom); | |
42 WTF_EXPORT DEFINE_GLOBAL(AtomicString, httpsAtom); | |
43 | |
44 // This is not an AtomicString because it is unlikely to be used as an | |
45 // event/element/attribute name, so it shouldn't pollute the AtomicString hash | |
46 // table. | |
47 WTF_EXPORT DEFINE_GLOBAL(String, xmlnsWithColon); | |
48 | |
49 WTF_EXPORT DEFINE_GLOBAL(String, emptyString); | |
50 WTF_EXPORT DEFINE_GLOBAL(String, emptyString16Bit); | |
51 | |
52 NEVER_INLINE unsigned StringImpl::hashSlowCase() const { | |
53 if (is8Bit()) | |
54 setHash(StringHasher::computeHashAndMaskTop8Bits(characters8(), m_length)); | |
55 else | |
56 setHash(StringHasher::computeHashAndMaskTop8Bits(characters16(), m_length)); | |
57 return existingHash(); | |
58 } | |
59 | |
60 void AtomicString::init() { | |
61 DCHECK(isMainThread()); | |
62 | |
63 new (NotNull, (void*)&nullAtom) AtomicString; | |
64 new (NotNull, (void*)&emptyAtom) AtomicString(""); | |
65 } | |
66 | |
67 template <unsigned charactersCount> | |
68 PassRefPtr<StringImpl> addStaticASCIILiteral( | |
69 const char (&characters)[charactersCount]) { | |
70 unsigned length = charactersCount - 1; | |
71 unsigned hash = StringHasher::computeHashAndMaskTop8Bits( | |
72 reinterpret_cast<const LChar*>(characters), length); | |
73 return adoptRef(StringImpl::createStatic(characters, length, hash)); | |
74 } | |
75 | |
76 void StringStatics::init() { | |
77 DCHECK(isMainThread()); | |
78 | |
79 StringImpl::initStatics(); | |
80 new (NotNull, (void*)&emptyString) String(StringImpl::empty); | |
81 new (NotNull, (void*)&emptyString16Bit) String(StringImpl::empty16Bit); | |
82 | |
83 // FIXME: These should be allocated at compile time. | |
84 new (NotNull, (void*)&starAtom) AtomicString("*"); | |
85 new (NotNull, (void*)&xmlAtom) AtomicString(addStaticASCIILiteral("xml")); | |
86 new (NotNull, (void*)&xmlnsAtom) AtomicString(addStaticASCIILiteral("xmlns")); | |
87 new (NotNull, (void*)&xlinkAtom) AtomicString(addStaticASCIILiteral("xlink")); | |
88 new (NotNull, (void*)&xmlnsWithColon) String("xmlns:"); | |
89 new (NotNull, (void*)&httpAtom) AtomicString(addStaticASCIILiteral("http")); | |
90 new (NotNull, (void*)&httpsAtom) AtomicString(addStaticASCIILiteral("https")); | |
91 } | |
92 | |
93 } // namespace WTF | |
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