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 COMPUTER, 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 COMPUTER, 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 "config.h"
27 #include "IdentifierRep.h"
28 #include "JSDOMBinding.h"
29
30 #include "PlatformString.h"
31 #include <runtime/UString.h>
32 #include <wtf/HashMap.h>
33 #include <wtf/StdLibExtras.h>
34
35 using namespace JSC;
36
37 namespace WebCore {
38
39 typedef HashSet<IdentifierRep*> IdentifierSet;
40
identifierSet()41 static IdentifierSet& identifierSet()
42 {
43 DEFINE_STATIC_LOCAL(IdentifierSet, identifierSet, ());
44 return identifierSet;
45 }
46
47 typedef HashMap<int, IdentifierRep*> IntIdentifierMap;
48
intIdentifierMap()49 static IntIdentifierMap& intIdentifierMap()
50 {
51 DEFINE_STATIC_LOCAL(IntIdentifierMap, intIdentifierMap, ());
52 return intIdentifierMap;
53 }
54
get(int intID)55 IdentifierRep* IdentifierRep::get(int intID)
56 {
57 if (intID == 0 || intID == -1) {
58 static IdentifierRep* negativeOneAndZeroIdentifiers[2];
59
60 IdentifierRep* identifier = negativeOneAndZeroIdentifiers[intID + 1];
61 if (!identifier) {
62 identifier = new IdentifierRep(intID);
63
64 negativeOneAndZeroIdentifiers[intID + 1] = identifier;
65 }
66
67 return identifier;
68 }
69
70 pair<IntIdentifierMap::iterator, bool> result = intIdentifierMap().add(intID, 0);
71 if (result.second) {
72 ASSERT(!result.first->second);
73 result.first->second = new IdentifierRep(intID);
74
75 identifierSet().add(result.first->second);
76 }
77
78 return result.first->second;
79 }
80
81 typedef HashMap<RefPtr<StringImpl>, IdentifierRep*> StringIdentifierMap;
82
stringIdentifierMap()83 static StringIdentifierMap& stringIdentifierMap()
84 {
85 DEFINE_STATIC_LOCAL(StringIdentifierMap, stringIdentifierMap, ());
86 return stringIdentifierMap;
87 }
88
get(const char * name)89 IdentifierRep* IdentifierRep::get(const char* name)
90 {
91 ASSERT(name);
92 if (!name)
93 return 0;
94
95 UString string = stringToUString(String::fromUTF8WithLatin1Fallback(name, strlen(name)));
96 pair<StringIdentifierMap::iterator, bool> result = stringIdentifierMap().add(string.impl(), 0);
97 if (result.second) {
98 ASSERT(!result.first->second);
99 result.first->second = new IdentifierRep(name);
100
101 identifierSet().add(result.first->second);
102 }
103
104 return result.first->second;
105 }
106
isValid(IdentifierRep * identifier)107 bool IdentifierRep::isValid(IdentifierRep* identifier)
108 {
109 return identifierSet().contains(identifier);
110 }
111
112 } // namespace WebCore
113