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
|
/***************************************************************************
* Copyright (C) 2016 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* 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. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <QRegExp>
#include "archiveinputdevice.h"
ArchiveInputDevice::ArchiveInputDevice(const QString &url, QObject *parent) : QIODevice(parent)
{
m_archive = 0;
m_entry = 0;
QString filePath = url.section("#", -1);
QString archivePath = url;
archivePath.remove(QRegExp("^.+://"));
archivePath.remove(QRegExp("#.+$"));
m_archive = archive_read_new();
archive_read_support_filter_all(m_archive);
archive_read_support_format_all(m_archive);
int r = archive_read_open_filename(m_archive, archivePath.toLocal8Bit().constData(), 10240);
if (r != ARCHIVE_OK)
{
qWarning("ArchiveInputDevice: unable to open file '%s', libarchive error: %s",
qPrintable(archivePath), archive_error_string(m_archive));
return;
}
while (archive_read_next_header(m_archive, &m_entry) == ARCHIVE_OK)
{
QString pathName = QString::fromLocal8Bit(archive_entry_pathname(m_entry));
if(!pathName.startsWith("/"))
pathName.prepend("/");
if(archive_entry_filetype(m_entry) == AE_IFREG && filePath == pathName)
{
open(QIODevice::ReadOnly);
m_buffer.open(QBuffer::ReadWrite);
break;
}
archive_read_data_skip(m_archive);
}
m_close_libarchive = true;
}
ArchiveInputDevice::ArchiveInputDevice(archive *a, archive_entry *e, QObject *parent) : QIODevice(parent)
{
m_archive = a;
m_entry = e;
open(QIODevice::ReadOnly);
m_buffer.open(QBuffer::ReadWrite);
m_close_libarchive = false;
}
ArchiveInputDevice::~ArchiveInputDevice()
{
if(m_close_libarchive && m_archive)
{
archive_read_close(m_archive);
archive_read_free(m_archive);
m_archive = 0;
}
}
bool ArchiveInputDevice::seek(qint64 pos)
{
QIODevice::seek(pos);
if(pos > m_buffer.size())
{
char tmp[1024];
qint64 delta = pos - m_buffer.size();
while (delta > 0)
{
qint64 r = qMin(qint64(sizeof(tmp)), delta);
r = archive_read_data(m_archive, tmp, r);
if(r > 0)
{
m_buffer.buffer().append(tmp, r);
delta -= r;
continue;
}
else if(r < 0)
{
qWarning("ArchiveInputDevice: seeking failed; libarchive error: %s", archive_error_string(m_archive));
}
return false;
}
}
return m_buffer.seek(pos);
}
qint64 ArchiveInputDevice::size() const
{
return archive_entry_size(m_entry);
}
qint64 ArchiveInputDevice::readData(char *data, qint64 maxSize)
{
if(m_buffer.pos() + maxSize > m_buffer.size())
{
qint64 l = m_buffer.pos() + maxSize - m_buffer.size();
char tmp[l];
int r = archive_read_data(m_archive, tmp, l);
if(r > 0)
m_buffer.buffer().append(tmp, r);
else if(r < 0)
qWarning("ArchiveInputDevice: reading failed; libarchive error: %s", archive_error_string(m_archive));
}
return m_buffer.read(data, maxSize);
}
qint64 ArchiveInputDevice::writeData(const char *, qint64)
{
return -1;
}
|
