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
|
/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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 "config.h"
#include "StateFile.hxx"
#include "OutputState.hxx"
#include "PlaylistState.hxx"
#include "TextFile.hxx"
#include "Partition.hxx"
#include "Volume.hxx"
#include "event/Loop.hxx"
#include "fs/FileSystem.hxx"
#include "util/Domain.hxx"
#include "Log.hxx"
#include <string.h>
static constexpr Domain state_file_domain("state_file");
StateFile::StateFile(Path &&_path,
Partition &_partition, EventLoop &_loop)
:TimeoutMonitor(_loop),
path(std::move(_path)), path_utf8(path.ToUTF8()),
partition(_partition),
prev_volume_version(0), prev_output_version(0),
prev_playlist_version(0)
{
}
void
StateFile::RememberVersions()
{
prev_volume_version = sw_volume_state_get_hash();
prev_output_version = audio_output_state_get_version();
prev_playlist_version = playlist_state_get_hash(&partition.playlist,
&partition.pc);
}
bool
StateFile::IsModified() const
{
return prev_volume_version != sw_volume_state_get_hash() ||
prev_output_version != audio_output_state_get_version() ||
prev_playlist_version != playlist_state_get_hash(&partition.playlist,
&partition.pc);
}
void
StateFile::Write()
{
FormatDebug(state_file_domain,
"Saving state file %s", path_utf8.c_str());
FILE *fp = FOpen(path, FOpenMode::WriteText);
if (gcc_unlikely(!fp)) {
FormatErrno(state_file_domain, "failed to create %s",
path_utf8.c_str());
return;
}
save_sw_volume_state(fp);
audio_output_state_save(fp);
playlist_state_save(fp, &partition.playlist, &partition.pc);
fclose(fp);
RememberVersions();
}
void
StateFile::Read()
{
bool success;
FormatDebug(state_file_domain, "Loading state file %s", path_utf8.c_str());
TextFile file(path);
if (file.HasFailed()) {
FormatErrno(state_file_domain, "failed to open %s",
path_utf8.c_str());
return;
}
const char *line;
while ((line = file.ReadLine()) != NULL) {
success = read_sw_volume_state(line) ||
audio_output_state_read(line) ||
playlist_state_restore(line, file, &partition.playlist,
&partition.pc);
if (!success)
FormatError(state_file_domain,
"Unrecognized line in state file: %s",
line);
}
RememberVersions();
}
void
StateFile::CheckModified()
{
if (!IsActive() && IsModified())
ScheduleSeconds(2 * 60);
}
void
StateFile::OnTimeout()
{
Write();
}
|
