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
31namespace WTF {
32
33struct 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
39template<> struct DefaultHash<WebCore::Color> {
40 using Hash = ColorHash;
41};
42
43template<> 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