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
|
/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2017 - ROLI Ltd.
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
{
int64 juce_fileSetPosition (void* handle, int64 pos);
//==============================================================================
FileInputStream::FileInputStream (const File& f) : file (f)
{
openHandle();
}
int64 FileInputStream::getTotalLength()
{
// You should always check that a stream opened successfully before using it!
jassert (openedOk());
return file.getSize();
}
int FileInputStream::read (void* buffer, int bytesToRead)
{
// You should always check that a stream opened successfully before using it!
jassert (openedOk());
// The buffer should never be null, and a negative size is probably a
// sign that something is broken!
jassert (buffer != nullptr && bytesToRead >= 0);
auto num = readInternal (buffer, (size_t) bytesToRead);
currentPosition += (int64) num;
return (int) num;
}
bool FileInputStream::isExhausted()
{
return currentPosition >= getTotalLength();
}
int64 FileInputStream::getPosition()
{
return currentPosition;
}
bool FileInputStream::setPosition (int64 pos)
{
// You should always check that a stream opened successfully before using it!
jassert (openedOk());
if (pos != currentPosition)
currentPosition = juce_fileSetPosition (fileHandle, pos);
return currentPosition == pos;
}
//==============================================================================
#if JUCE_UNIT_TESTS
struct FileInputStreamTests : public UnitTest
{
FileInputStreamTests()
: UnitTest ("FileInputStream", "Streams")
{}
void runTest() override
{
const MemoryBlock data ("abcdefghijklmnopqrstuvwxyz", 26);
File f (File::createTempFile (".txt"));
f.appendData (data.getData(), data.getSize());
FileInputStream stream (f);
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());
f.deleteFile();
}
};
static FileInputStreamTests fileInputStreamTests;
#endif
} // namespace juce
|
