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