1/*
2 * Copyright (C) 2015 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <wtf/Hasher.h>
29#include <wtf/Vector.h>
30
31namespace WebCore {
32
33namespace ContentExtensions {
34
35struct HashableActionList {
36 enum DeletedValueTag { DeletedValue };
37 explicit HashableActionList(DeletedValueTag) { state = Deleted; }
38
39 enum EmptyValueTag { EmptyValue };
40 explicit HashableActionList(EmptyValueTag) { state = Empty; }
41
42 template<typename AnyVectorType>
43 explicit HashableActionList(const AnyVectorType& otherActions)
44 : actions(otherActions)
45 , state(Valid)
46 {
47 std::sort(actions.begin(), actions.end());
48 StringHasher hasher;
49 hasher.addCharactersAssumingAligned(reinterpret_cast<const UChar*>(actions.data()), actions.size() * sizeof(uint64_t) / sizeof(UChar));
50 hash = hasher.hash();
51 }
52
53 bool isEmptyValue() const { return state == Empty; }
54 bool isDeletedValue() const { return state == Deleted; }
55
56 bool operator==(const HashableActionList& other) const
57 {
58 return state == other.state && actions == other.actions;
59 }
60
61 bool operator!=(const HashableActionList& other) const
62 {
63 return !(*this == other);
64 }
65
66 Vector<uint64_t> actions;
67 unsigned hash;
68 enum {
69 Valid,
70 Empty,
71 Deleted
72 } state;
73};
74
75struct HashableActionListHash {
76 static unsigned hash(const HashableActionList& actionKey)
77 {
78 return actionKey.hash;
79 }
80
81 static bool equal(const HashableActionList& a, const HashableActionList& b)
82 {
83 return a == b;
84 }
85 static const bool safeToCompareToEmptyOrDeleted = false;
86};
87
88struct HashableActionListHashTraits : public WTF::CustomHashTraits<HashableActionList> {
89 static const bool emptyValueIsZero = false;
90};
91
92} // namespace ContentExtensions
93} // namespace WebCore
94