1 | /* |
2 | * Copyright (C) 2016 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 | * |
14 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
15 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
16 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
17 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
18 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
19 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
20 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
21 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 | */ |
25 | |
26 | #pragma once |
27 | |
28 | #include "Color.h" |
29 | #include <wtf/HashTraits.h> |
30 | |
31 | namespace WTF { |
32 | |
33 | struct ColorHash { |
34 | static unsigned hash(const WebCore::Color& key) { return key.hash(); } |
35 | static bool equal(const WebCore::Color& a, const WebCore::Color& b) { return a == b; } |
36 | static const bool safeToCompareToEmptyOrDeleted = true; |
37 | }; |
38 | |
39 | template<> struct DefaultHash<WebCore::Color> { |
40 | using Hash = ColorHash; |
41 | }; |
42 | |
43 | template<> struct HashTraits<WebCore::Color> : GenericHashTraits<WebCore::Color> { |
44 | static const bool emptyValueIsZero = false; |
45 | static WebCore::Color emptyValue() { return WebCore::Color(HashTableEmptyValue); } |
46 | |
47 | static void constructDeletedValue(WebCore::Color& slot) { new (NotNull, &slot) WebCore::Color(HashTableDeletedValue); } |
48 | static bool isDeletedValue(const WebCore::Color& value) { return value.isHashTableDeletedValue(); } |
49 | }; |
50 | |
51 | } // namespace WTF |
52 | |