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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2020 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
MemoryInputStream::MemoryInputStream (const void* sourceData, size_t sourceDataSize, bool keepCopy)
: data (sourceData),
dataSize (sourceDataSize)
{
if (keepCopy)
{
internalCopy = MemoryBlock (sourceData, sourceDataSize);
data = internalCopy.getData();
}
}
MemoryInputStream::MemoryInputStream (const MemoryBlock& sourceData, bool keepCopy)
: data (sourceData.getData()),
dataSize (sourceData.getSize())
{
if (keepCopy)
{
internalCopy = sourceData;
data = internalCopy.getData();
}
}
MemoryInputStream::MemoryInputStream (MemoryBlock&& source)
: internalCopy (std::move (source))
{
data = internalCopy.getData();
dataSize = internalCopy.getSize();
}
MemoryInputStream::~MemoryInputStream() = default;
int64 MemoryInputStream::getTotalLength()
{
return (int64) dataSize;
}
int MemoryInputStream::read (void* buffer, int howMany)
{
jassert (buffer != nullptr && howMany >= 0);
if (howMany <= 0 || position >= dataSize)
return 0;
auto num = jmin ((size_t) howMany, dataSize - position);
if (num > 0)
{
memcpy (buffer, addBytesToPointer (data, position), num);
position += num;
}
return (int) num;
}
bool MemoryInputStream::isExhausted()
{
return position >= dataSize;
}
bool MemoryInputStream::setPosition (const int64 pos)
{
position = (size_t) jlimit ((int64) 0, (int64) dataSize, pos);
return true;
}
int64 MemoryInputStream::getPosition()
{
return (int64) position;
}
void MemoryInputStream::skipNextBytes (int64 numBytesToSkip)
{
if (numBytesToSkip > 0)
setPosition (getPosition() + numBytesToSkip);
}
//==============================================================================
//==============================================================================
#if JUCE_UNIT_TESTS
class MemoryStreamTests : public UnitTest
{
public:
MemoryStreamTests()
: UnitTest ("MemoryInputStream & MemoryOutputStream", UnitTestCategories::streams)
{}
void runTest() override
{
beginTest ("Basics");
Random r = getRandom();
int randomInt = r.nextInt();
int64 randomInt64 = r.nextInt64();
double randomDouble = r.nextDouble();
String randomString (createRandomWideCharString (r));
MemoryOutputStream mo;
mo.writeInt (randomInt);
mo.writeIntBigEndian (randomInt);
mo.writeCompressedInt (randomInt);
mo.writeString (randomString);
mo.writeInt64 (randomInt64);
mo.writeInt64BigEndian (randomInt64);
mo.writeDouble (randomDouble);
mo.writeDoubleBigEndian (randomDouble);
MemoryInputStream mi (mo.getData(), mo.getDataSize(), false);
expect (mi.readInt() == randomInt);
expect (mi.readIntBigEndian() == randomInt);
expect (mi.readCompressedInt() == randomInt);
expectEquals (mi.readString(), randomString);
expect (mi.readInt64() == randomInt64);
expect (mi.readInt64BigEndian() == randomInt64);
expect (mi.readDouble() == randomDouble);
expect (mi.readDoubleBigEndian() == randomDouble);
const MemoryBlock data ("abcdefghijklmnopqrstuvwxyz", 26);
MemoryInputStream stream (data, true);
beginTest ("Read");
expectEquals (stream.getPosition(), (int64) 0);
expectEquals (stream.getTotalLength(), (int64) data.getSize());
expectEquals (stream.getNumBytesRemaining(), stream.getTotalLength());
expect (! stream.isExhausted());
size_t numBytesRead = 0;
MemoryBlock readBuffer (data.getSize());
while (numBytesRead < data.getSize())
{
numBytesRead += (size_t) stream.read (&readBuffer[numBytesRead], 3);
expectEquals (stream.getPosition(), (int64) numBytesRead);
expectEquals (stream.getNumBytesRemaining(), (int64) (data.getSize() - numBytesRead));
expect (stream.isExhausted() == (numBytesRead == data.getSize()));
}
expectEquals (stream.getPosition(), (int64) data.getSize());
expectEquals (stream.getNumBytesRemaining(), (int64) 0);
expect (stream.isExhausted());
expect (readBuffer == data);
beginTest ("Skip");
stream.setPosition (0);
expectEquals (stream.getPosition(), (int64) 0);
expectEquals (stream.getTotalLength(), (int64) data.getSize());
expectEquals (stream.getNumBytesRemaining(), stream.getTotalLength());
expect (! stream.isExhausted());
numBytesRead = 0;
const int numBytesToSkip = 5;
while (numBytesRead < data.getSize())
{
stream.skipNextBytes (numBytesToSkip);
numBytesRead += numBytesToSkip;
numBytesRead = std::min (numBytesRead, data.getSize());
expectEquals (stream.getPosition(), (int64) numBytesRead);
expectEquals (stream.getNumBytesRemaining(), (int64) (data.getSize() - numBytesRead));
expect (stream.isExhausted() == (numBytesRead == data.getSize()));
}
expectEquals (stream.getPosition(), (int64) data.getSize());
expectEquals (stream.getNumBytesRemaining(), (int64) 0);
expect (stream.isExhausted());
}
static String createRandomWideCharString (Random& r)
{
juce_wchar buffer [50] = { 0 };
for (int i = 0; i < numElementsInArray (buffer) - 1; ++i)
{
if (r.nextBool())
{
do
{
buffer[i] = (juce_wchar) (1 + r.nextInt (0x10ffff - 1));
}
while (! CharPointer_UTF16::canRepresent (buffer[i]));
}
else
buffer[i] = (juce_wchar) (1 + r.nextInt (0xff));
}
return CharPointer_UTF32 (buffer);
}
};
static MemoryStreamTests memoryInputStreamUnitTests;
#endif
} // namespace juce
|
