1/*
2 * Copyright (C) 2008 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
27#ifndef CallIdentifier_h
28#define CallIdentifier_h
29
30#include <runtime/UString.h>
31#include <wtf/text/CString.h>
32#include <wtf/text/StringHash.h>
33
34namespace JSC {
35
36    struct CallIdentifier {
37        WTF_MAKE_FAST_ALLOCATED;
38    public:
39        UString m_name;
40        UString m_url;
41        unsigned m_lineNumber;
42
43        CallIdentifier()
44            : m_lineNumber(0)
45        {
46        }
47
48        CallIdentifier(const UString& name, const UString& url, int lineNumber)
49            : m_name(name)
50            , m_url(!url.isNull() ? url : "")
51            , m_lineNumber(lineNumber)
52        {
53        }
54
55        inline bool operator==(const CallIdentifier& ci) const { return ci.m_lineNumber == m_lineNumber && ci.m_name == m_name && ci.m_url == m_url; }
56        inline bool operator!=(const CallIdentifier& ci) const { return !(*this == ci); }
57
58        struct Hash {
59            static unsigned hash(const CallIdentifier& key)
60            {
61                unsigned hashCodes[3] = {
62                    key.m_name.impl()->hash(),
63                    key.m_url.impl()->hash(),
64                    key.m_lineNumber
65                };
66                return StringHasher::hashMemory<sizeof(hashCodes)>(hashCodes);
67            }
68
69            static bool equal(const CallIdentifier& a, const CallIdentifier& b) { return a == b; }
70            static const bool safeToCompareToEmptyOrDeleted = true;
71        };
72
73        unsigned hash() const { return Hash::hash(*this); }
74
75#ifndef NDEBUG
76        operator const char*() const { return c_str(); }
77        const char* c_str() const { return m_name.utf8().data(); }
78#endif
79    };
80
81} // namespace JSC
82
83namespace WTF {
84
85    template<> struct DefaultHash<JSC::CallIdentifier> { typedef JSC::CallIdentifier::Hash Hash; };
86
87    template<> struct HashTraits<JSC::CallIdentifier> : GenericHashTraits<JSC::CallIdentifier> {
88        static void constructDeletedValue(JSC::CallIdentifier& slot)
89        {
90            new (&slot) JSC::CallIdentifier(JSC::UString(), JSC::UString(), std::numeric_limits<unsigned>::max());
91        }
92        static bool isDeletedValue(const JSC::CallIdentifier& value)
93        {
94            return value.m_name.isNull() && value.m_url.isNull() && value.m_lineNumber == std::numeric_limits<unsigned>::max();
95        }
96    };
97
98} // namespace WTF
99
100#endif  // CallIdentifier_h
101
102