summaryrefslogtreecommitdiff
path: root/vfs_stdio.c
blob: 6f006efaffa516484ce3b1f68ead6b79c0afb615 (plain)
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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
/*
    DeaDBeeF - ultimate music player for GNU/Linux systems with X11
    Copyright (C) 2009-2011 Alexey Yakovenko <waker@users.sourceforge.net>

    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 "deadbeef.h"
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#ifndef __linux__
#define off64_t off_t
#define lseek64 lseek
#define O_LARGEFILE 0
#endif

//#define USE_STDIO

static DB_functions_t *deadbeef;
typedef struct {
    DB_vfs_t *vfs;
#ifdef USE_STDIO
    FILE *stream;
#else
    int stream;
    int64_t offs;
#endif
} STDIO_FILE;

static DB_vfs_t plugin;

static DB_FILE *
stdio_open (const char *fname) {
    if (!memcmp (fname, "file://", 7)) {
        fname += 7;
    }
#ifdef USE_STDIO
    FILE *file = fopen (fname, "rb");
    if (!file) {
        return NULL;
    }
#else
    int file = open (fname, O_LARGEFILE);
    if (file == -1) {
        return NULL;
    }
#endif
    STDIO_FILE *fp = malloc (sizeof (STDIO_FILE));
    fp->vfs = &plugin;
    fp->stream = file;
#ifndef USE_STDIO
    fp->offs = 0;
#endif
    return (DB_FILE*)fp;
}

static void
stdio_close (DB_FILE *stream) {
    assert (stream);
#ifdef USE_STDIO
    fclose (((STDIO_FILE *)stream)->stream);
#else
    close (((STDIO_FILE *)stream)->stream);
#endif
    free (stream);
}

static size_t
stdio_read (void *ptr, size_t size, size_t nmemb, DB_FILE *stream) {
    assert (stream);
    assert (ptr);
#ifdef USE_STDIO
    return fread (ptr, size, nmemb, ((STDIO_FILE*)stream)->stream);
#else
    int res = read (((STDIO_FILE*)stream)->stream, ptr, size*nmemb);
    if (res == -1) {
        return 0;
    }
    ((STDIO_FILE*)stream)->offs += res;
    return res / size;
#endif
}

static int
stdio_seek (DB_FILE *stream, int64_t offset, int whence) {
    assert (stream);
#ifdef USE_STDIO
    return fseek (((STDIO_FILE *)stream)->stream, offset, whence);
#else
    off64_t res = lseek64 (((STDIO_FILE *)stream)->stream, offset, whence);
    if (res == -1) {
        return -1;
    }
//    printf ("lseek res: %lld (%lld, %d, prev=%lld)\n", res, offset, whence,  ((STDIO_FILE*)stream)->offs);
    ((STDIO_FILE*)stream)->offs = res; 
#endif
    return 0;
}

static int64_t
stdio_tell (DB_FILE *stream) {
    assert (stream);
#ifdef USE_STDIO
    return ftell (((STDIO_FILE*)stream)->stream);
#else
    return ((STDIO_FILE*)stream)->offs;
#endif
}

static void
stdio_rewind (DB_FILE *stream) {
    assert (stream);
#ifdef USE_STDIO
    rewind (((STDIO_FILE*)stream)->stream);
#else
    stdio_seek (stream, 0, SEEK_SET);
#endif
}

static int64_t
stdio_getlength (DB_FILE *stream) {
    assert (stream);
    STDIO_FILE *f = (STDIO_FILE *)stream;
#ifdef USE_STDIO
    size_t offs = ftell (f->stream);
    fseek (f->stream, 0, SEEK_END);
    size_t l = ftell (f->stream);
    fseek (f->stream, offs, SEEK_SET);
    return l;
#else
    int64_t size = lseek64 (f->stream, 0, SEEK_END);
    lseek64 (f->stream, f->offs, SEEK_SET);
    return size;
#endif
}

const char *
stdio_get_content_type (DB_FILE *stream) {
    return NULL;
}

int
stdio_is_streaming (void) {
    return 0;
}

// standard stdio vfs
static DB_vfs_t plugin = {
    DB_PLUGIN_SET_API_VERSION
    .plugin.version_major = 1,
    .plugin.version_minor = 0,
    .plugin.type = DB_PLUGIN_VFS,
    .plugin.name = "stdio vfs",
    .plugin.id = "vfs_stdio",
    .plugin.descr = "Standard IO plugin\nUsed for reading normal local files\nIt is statically linked, so you can't delete it.",
    .plugin.copyright = 
        "Copyright (C) 2009-2011 Alexey Yakovenko <waker@users.sourceforge.net>\n"
        "\n"
        "This program is free software; you can redistribute it and/or\n"
        "modify it under the terms of the GNU General Public License\n"
        "as published by the Free Software Foundation; either version 2\n"
        "of the License, or (at your option) any later version.\n"
        "\n"
        "This program is distributed in the hope that it will be useful,\n"
        "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
        "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
        "GNU General Public License for more details.\n"
        "\n"
        "You should have received a copy of the GNU General Public License\n"
        "along with this program; if not, write to the Free Software\n"
        "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.\n"
    ,
    .plugin.website = "http://deadbeef.sf.net",
    .open = stdio_open,
    .close = stdio_close,
    .read = stdio_read,
    .seek = stdio_seek,
    .tell = stdio_tell,
    .rewind = stdio_rewind,
    .getlength = stdio_getlength,
    .get_content_type = stdio_get_content_type,
    .is_streaming = stdio_is_streaming
};

DB_plugin_t *
stdio_load (DB_functions_t *api) {
    deadbeef = api;
    return DB_PLUGIN (&plugin);
}