/*

 * Copyright (C) 2008 Apple Inc. All Rights Reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef CallIdentifier_h

#define CallIdentifier_h

#include <runtime/UString.h>

#include "FastAllocBase.h"

namespace JSC {

    struct CallIdentifier : public FastAllocBase {

        UString m_name;

        UString m_url;

        unsigned m_lineNumber;

        CallIdentifier()

            : m_lineNumber(0)

        {

        }

        CallIdentifier(const UString& name, const UString& url, int lineNumber)

            : m_name(name)

            , m_url(url)

            , m_lineNumber(lineNumber)

        {

        }

        inline bool operator==(const CallIdentifier& ci) const { return ci.m_lineNumber == m_lineNumber && ci.m_name == m_name && ci.m_url == m_url; }

        inline bool operator!=(const CallIdentifier& ci) const { return !(*this == ci); }

        struct Hash {

            static unsigned hash(const CallIdentifier& key)

            {

                unsigned hashCodes[3] = {

                    key.m_name.rep()->hash(),

                    key.m_url.rep()->hash(),

                    key.m_lineNumber

                };

                return UString::Rep::computeHash(reinterpret_cast<char*>(hashCodes), sizeof(hashCodes));

            }

            static bool equal(const CallIdentifier& a, const CallIdentifier& b) { return a == b; }

            static const bool safeToCompareToEmptyOrDeleted = true;

        };

        unsigned hash() const { return Hash::hash(*this); }

#ifndef NDEBUG

        operator const char*() const { return c_str(); }

        const char* c_str() const { return m_name.UTF8String().c_str(); }

#endif

    };

} // namespace JSC

namespace WTF {

    template<> struct DefaultHash<JSC::CallIdentifier> { typedef JSC::CallIdentifier::Hash Hash; };

    template<> struct HashTraits<JSC::CallIdentifier> : GenericHashTraits<JSC::CallIdentifier> {

        static void constructDeletedValue(JSC::CallIdentifier& slot)

        {

            new (&slot) JSC::CallIdentifier(JSC::UString(), JSC::UString(), std::numeric_limits<unsigned>::max());

        }

        static bool isDeletedValue(const JSC::CallIdentifier& value)

        {

            return value.m_name.isNull() && value.m_url.isNull() && value.m_lineNumber == std::numeric_limits<unsigned>::max();

        }

    };

} // namespace WTF

#endif  // CallIdentifier_h