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
|
/*
* bytestream.cpp
*
* (c) 2003,2008 by Jeremy Bowman <jmbowman@alum.mit.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
/** @file bytestream.cpp
* Source file for ByteStream
*/
#include <qstring.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bytestream.h"
/**
* Constructor for reading.
*
* @param data The byte array to read from
*/
ByteStream::ByteStream(const QByteArray &data) : content(data), location(0),
writing(false)
{
}
/**
* Constructor for writing.
*/
ByteStream::ByteStream() : location(0), writing(true)
{
}
/**
* Destructor.
*/
ByteStream::~ByteStream()
{
}
/**
* Fetch some bytes sequentially.
*
* @param buffer A pointer to the location to begin copying bytes to
* @param length The maximum number of bytes to copy
* @return The number of bytes actually copied
*/
int ByteStream::Read(void *buffer, int length)
{
if (content.size() == 0) {
return 0;
}
int size = length;
if (location + length > content.size()) {
size = content.size() - location;
}
memcpy(buffer, content.data() + location, size);
location += size;
return size;
}
/**
* Store some bytes sequentially.
*
* @param buffer A pointer to the byte array to copy from
* @param length The number of bytes to copy
* @return True if the bytes were successfully stored
*/
bool ByteStream::Write(const void *buffer, int length)
{
content.append(QByteArray((const char*)buffer, length));
location += length;
return true;
}
/**
* Get the written content.
*
* @return The written content
*/
QByteArray ByteStream::getContent()
{
return content;
}
|
