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 "FastAllocBase.h" 32 33 namespace JSC { 34 35 struct CallIdentifier : public FastAllocBase { 36 UString m_name; 37 UString m_url; 38 unsigned m_lineNumber; 39 40 CallIdentifier() 41 : m_lineNumber(0) 42 { 43 } 44 45 CallIdentifier(const UString& name, const UString& url, int lineNumber) 46 : m_name(name) 47 , m_url(url) 48 , m_lineNumber(lineNumber) 49 { 50 } 51 52 inline bool operator==(const CallIdentifier& ci) const { return ci.m_lineNumber == m_lineNumber && ci.m_name == m_name && ci.m_url == m_url; } 53 inline bool operator!=(const CallIdentifier& ci) const { return !(*this == ci); } 54 55 struct Hash { 56 static unsigned hash(const CallIdentifier& key) 57 { 58 unsigned hashCodes[3] = { 59 key.m_name.rep()->hash(), 60 key.m_url.rep()->hash(), 61 key.m_lineNumber 62 }; 63 return UString::Rep::computeHash(reinterpret_cast<char*>(hashCodes), sizeof(hashCodes)); 64 } 65 66 static bool equal(const CallIdentifier& a, const CallIdentifier& b) { return a == b; } 67 static const bool safeToCompareToEmptyOrDeleted = true; 68 }; 69 70 unsigned hash() const { return Hash::hash(*this); } 71 72 #ifndef NDEBUG 73 operator const char*() const { return c_str(); } 74 const char* c_str() const { return m_name.UTF8String().c_str(); } 75 #endif 76 }; 77 78 } // namespace JSC 79 80 namespace WTF { 81 82 template<> struct DefaultHash<JSC::CallIdentifier> { typedef JSC::CallIdentifier::Hash Hash; }; 83 84 template<> struct HashTraits<JSC::CallIdentifier> : GenericHashTraits<JSC::CallIdentifier> { 85 static void constructDeletedValue(JSC::CallIdentifier& slot) 86 { 87 new (&slot) JSC::CallIdentifier(JSC::UString(), JSC::UString(), std::numeric_limits<unsigned>::max()); 88 } 89 static bool isDeletedValue(const JSC::CallIdentifier& value) 90 { 91 return value.m_name.isNull() && value.m_url.isNull() && value.m_lineNumber == std::numeric_limits<unsigned>::max(); 92 } 93 }; 94 95 } // namespace WTF 96 97 #endif // CallIdentifier_h 98 99
