WebCore/SecurityOriginHash.h

   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  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef SecurityOriginHash_h
  30 #define SecurityOriginHash_h
  31
  32 #include "KURL.h"
  33 #include "SecurityOrigin.h"
  34 #include <wtf/RefPtr.h>
  35
  36 namespace WebCore {
  37
  38 struct SecurityOriginHash {
  39     static unsigned hash(SecurityOrigin* origin)
  40     {
  41         unsigned hashCodes[3] = {
  42             origin->protocol().impl() ? origin->protocol().impl()->hash() : 0,
  43             origin->host().impl() ? origin->host().impl()->hash() : 0,
  44             origin->port()
  45         };
  46         return StringImpl::computeHash(reinterpret_cast<UChar*>(hashCodes), sizeof(hashCodes) / sizeof(UChar));
  47     }
  48     static unsigned hash(const RefPtr<SecurityOrigin>& origin)
  49     {
  50         return hash(origin.get());
  51     }
  52
  53     static bool equal(SecurityOrigin* a, SecurityOrigin* b)
  54     {
  55         // FIXME: The hash function above compares three specific fields.
  56         // This code to compare those three specific fields should be moved here from
  57         // SecurityOrigin as mentioned in SecurityOrigin.h so we don't accidentally change
  58         // equal without changing hash to match it.
  59         if (!a || !b)
  60             return a == b;
  61         return a->equal(b);
  62     }
  63     static bool equal(SecurityOrigin* a, const RefPtr<SecurityOrigin>& b)
  64     {
  65         return equal(a, b.get());
  66     }
  67     static bool equal(const RefPtr<SecurityOrigin>& a, SecurityOrigin* b)
  68     {
  69         return equal(a.get(), b);
  70     }
  71     static bool equal(const RefPtr<SecurityOrigin>& a, const RefPtr<SecurityOrigin>& b)
  72     {
  73         return equal(a.get(), b.get());
  74     }
  75
  76     static const bool safeToCompareToEmptyOrDeleted = false;
  77 };
  78
  79 } // namespace WebCore
  80
  81 #endif