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#ifndef DownloadID_h
27#define DownloadID_h
28
29#include "ArgumentCoder.h"
30#include "Decoder.h"
31#include "Encoder.h"
32#include <wtf/HashTraits.h>
33
34namespace WebKit {
35
36class DownloadID {
37public:
38 DownloadID()
39 {
40 }
41
42 explicit DownloadID(uint64_t downloadID)
43 : m_downloadID(downloadID)
44 {
45 }
46
47 bool operator==(DownloadID other) const { return m_downloadID == other.m_downloadID; }
48 bool operator!=(DownloadID other) const { return m_downloadID != other.m_downloadID; }
49
50 uint64_t downloadID() const { return m_downloadID; }
51private:
52 uint64_t m_downloadID { 0 };
53};
54
55}
56
57namespace IPC {
58
59template<> struct ArgumentCoder<WebKit::DownloadID> {
60 static void encode(Encoder& encoder, const WebKit::DownloadID& downloadID)
61 {
62 encoder << downloadID.downloadID();
63 }
64 static bool decode(Decoder& decoder, WebKit::DownloadID& downloadID)
65 {
66 uint64_t id;
67 if (!decoder.decode(id))
68 return false;
69
70 downloadID = WebKit::DownloadID(id);
71
72 return true;
73 }
74};
75
76}
77
78namespace WTF {
79
80struct DownloadIDHash {
81 static unsigned hash(const WebKit::DownloadID& d) { return intHash(d.downloadID()); }
82 static bool equal(const WebKit::DownloadID& a, const WebKit::DownloadID& b) { return a.downloadID() == b.downloadID(); }
83 static const bool safeToCompareToEmptyOrDeleted = true;
84};
85template<> struct HashTraits<WebKit::DownloadID> : GenericHashTraits<WebKit::DownloadID> {
86 static WebKit::DownloadID emptyValue() { return { }; }
87
88 static void constructDeletedValue(WebKit::DownloadID& slot) { slot = WebKit::DownloadID(std::numeric_limits<uint64_t>::max()); }
89 static bool isDeletedValue(const WebKit::DownloadID& slot) { return slot.downloadID() == std::numeric_limits<uint64_t>::max(); }
90};
91template<> struct DefaultHash<WebKit::DownloadID> {
92 typedef DownloadIDHash Hash;
93};
94
95}
96#endif /* DownloadID_h */
97