1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Concepts.h>
#include <AK/Forward.h>
#include <AK/NumericLimits.h>
#include <AK/StdLibExtras.h>
#include <AK/String.h>
#include <AK/Try.h>
#include <LibCore/SharedCircularQueue.h>
#include <LibCore/Stream.h>
#include <LibIPC/File.h>
#include <LibIPC/Forward.h>
#include <LibIPC/Message.h>
namespace IPC {
template<typename T>
inline ErrorOr<void> decode(Decoder&, T&)
{
static_assert(DependentFalse<T>, "Base IPC::decoder() instantiated");
VERIFY_NOT_REACHED();
}
class Decoder {
public:
Decoder(InputMemoryStream& stream, Core::Stream::LocalSocket& socket)
: m_stream(stream)
, m_socket(socket)
{
}
ErrorOr<void> decode(bool&);
ErrorOr<void> decode(u8&);
ErrorOr<void> decode(u16&);
ErrorOr<void> decode(unsigned&);
ErrorOr<void> decode(unsigned long&);
ErrorOr<void> decode(unsigned long long&);
ErrorOr<void> decode(i8&);
ErrorOr<void> decode(i16&);
ErrorOr<void> decode(i32&);
ErrorOr<void> decode(i64&);
ErrorOr<void> decode(float&);
ErrorOr<void> decode(double&);
ErrorOr<void> decode(String&);
ErrorOr<void> decode(ByteBuffer&);
ErrorOr<void> decode(URL&);
ErrorOr<void> decode(Dictionary&);
ErrorOr<void> decode(File&);
template<typename K, typename V>
ErrorOr<void> decode(HashMap<K, V>& hashmap)
{
u32 size;
TRY(decode(size));
if (size > NumericLimits<i32>::max())
return Error::from_string_literal("IPC: Invalid HashMap size");
for (size_t i = 0; i < size; ++i) {
K key;
TRY(decode(key));
V value;
TRY(decode(value));
TRY(hashmap.try_set(move(key), move(value)));
}
return {};
}
template<typename K, typename V>
ErrorOr<void> decode(OrderedHashMap<K, V>& hashmap)
{
u32 size;
TRY(decode(size));
if (size > NumericLimits<i32>::max())
return Error::from_string_literal("IPC: Invalid HashMap size");
for (size_t i = 0; i < size; ++i) {
K key;
TRY(decode(key));
V value;
TRY(decode(value));
TRY(hashmap.try_set(move(key), move(value)));
}
return {};
}
template<Enum T>
ErrorOr<void> decode(T& enum_value)
{
UnderlyingType<T> inner_value;
TRY(decode(inner_value));
enum_value = T(inner_value);
return {};
}
template<typename T>
ErrorOr<void> decode(T& value)
{
return IPC::decode(*this, value);
}
template<typename T>
ErrorOr<void> decode(Vector<T>& vector)
{
u64 size;
TRY(decode(size));
if (size > NumericLimits<i32>::max())
return Error::from_string_literal("IPC: Invalid Vector size");
VERIFY(vector.is_empty());
TRY(vector.try_ensure_capacity(size));
for (size_t i = 0; i < size; ++i) {
T value;
TRY(decode(value));
vector.template unchecked_append(move(value));
}
return {};
}
template<typename T, size_t Size>
ErrorOr<void> decode(Core::SharedSingleProducerCircularQueue<T, Size>& queue)
{
// FIXME: We don't support decoding into valid queues.
VERIFY(!queue.is_valid());
IPC::File anon_file;
TRY(decode(anon_file));
queue = TRY((Core::SharedSingleProducerCircularQueue<T, Size>::try_create(anon_file.take_fd())));
return {};
}
template<typename T>
ErrorOr<void> decode(Optional<T>& optional)
{
bool has_value;
TRY(decode(has_value));
if (!has_value) {
optional = {};
return {};
}
T value;
TRY(decode(value));
optional = move(value);
return {};
}
private:
InputMemoryStream& m_stream;
Core::Stream::LocalSocket& m_socket;
};
}
|
