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
|
/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "input_file.h"
#include "log.h"
#include "os_compat.h"
static bool
input_file_open(struct input_stream *is, const char *filename)
{
FILE *fp;
if (filename[0] != '/')
return false;
fp = fopen(filename, "r");
if (!fp) {
is->error = errno;
return false;
}
is->seekable = true;
fseek(fp, 0, SEEK_END);
is->size = ftell(fp);
fseek(fp, 0, SEEK_SET);
#ifdef POSIX_FADV_SEQUENTIAL
posix_fadvise(fileno(fp), (off_t)0, is->size, POSIX_FADV_SEQUENTIAL);
#endif
is->data = fp;
is->ready = true;
return true;
}
static bool
input_file_seek(struct input_stream *is, long offset, int whence)
{
if (fseek((FILE *) is->data, offset, whence) == 0) {
is->offset = ftell((FILE *) is->data);
} else {
is->error = errno;
return false;
}
return true;
}
static size_t
input_file_read(struct input_stream *is, void *ptr, size_t size)
{
size_t readSize;
readSize = fread(ptr, 1, size, (FILE *) is->data);
if (readSize <= 0 && ferror((FILE *) is->data)) {
is->error = errno;
DEBUG("input_file_read: error reading: %s\n",
strerror(is->error));
}
is->offset = ftell((FILE *) is->data);
return readSize;
}
static void
input_file_close(struct input_stream *is)
{
fclose((FILE *) is->data);
}
static bool
input_file_eof(struct input_stream *is)
{
if (feof((FILE *) is->data))
return 1;
if (ferror((FILE *) is->data) && is->error != EINTR) {
return 1;
}
return 0;
}
static int
input_file_buffer(mpd_unused struct input_stream *is)
{
return 0;
}
const struct input_plugin input_plugin_file = {
.open = input_file_open,
.close = input_file_close,
.buffer = input_file_buffer,
.read = input_file_read,
.eof = input_file_eof,
.seek = input_file_seek,
};
|
