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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/* the Music Player Daemon (MPD)
* Copyright (C) 2008 Viliam Mateicka <viliam.mateicka@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
*/
/**
* iso archive handling (requires cdio, and iso9660)
*/
#include "archive_api.h"
#include "input_plugin.h"
#include <cdio/cdio.h>
#include <cdio/iso9660.h>
#include <glib.h>
#include <string.h>
#define CEILING(x, y) ((x+(y-1))/y)
typedef struct {
iso9660_t *iso;
iso9660_stat_t *statbuf;
size_t cur_ofs;
size_t max_blocks;
GSList *list;
GSList *iter;
} iso_context;
static const struct input_plugin iso_inputplugin;
/* archive open && listing routine */
static void
listdir_recur(const char *psz_path, iso_context *context)
{
iso9660_t *iso = context->iso;
CdioList_t *entlist;
CdioListNode_t *entnode;
iso9660_stat_t *statbuf;
char pathname[4096];
entlist = iso9660_ifs_readdir (iso, psz_path);
if (!entlist) {
return;
}
/* Iterate over the list of nodes that iso9660_ifs_readdir gives */
_CDIO_LIST_FOREACH (entnode, entlist) {
statbuf = (iso9660_stat_t *) _cdio_list_node_data (entnode);
strcpy(pathname, psz_path);
strcat(pathname, statbuf->filename);
if (_STAT_DIR == statbuf->type ) {
if (strcmp(statbuf->filename, ".") && strcmp(statbuf->filename, "..")) {
strcat(pathname, "/");
listdir_recur(pathname, context);
}
} else {
//remove leading /
context->list = g_slist_prepend( context->list,
g_strdup(pathname + 1));
}
}
_cdio_list_free (entlist, true);
}
static struct archive_file *
iso_open(char * pathname)
{
iso_context *context = g_malloc(sizeof(iso_context));
context->list = NULL;
/* open archive */
context->iso = iso9660_open (pathname);
if (context->iso == NULL) {
g_warning("iso %s open failed\n", pathname);
return NULL;
}
listdir_recur("/", context);
return (struct archive_file *)context;
}
static void
iso_scan_reset(struct archive_file *file)
{
iso_context *context = (iso_context *) file;
//reset iterator
context->iter = context->list;
}
static char *
iso_scan_next(struct archive_file *file)
{
iso_context *context = (iso_context *) file;
char *data = NULL;
if (context->iter != NULL) {
///fetch data and goto next
data = context->iter->data;
context->iter = g_slist_next(context->iter);
}
return data;
}
static void
iso_close(struct archive_file *file)
{
iso_context *context = (iso_context *) file;
GSList *tmp;
if (context->list) {
//free list
for (tmp = context->list; tmp != NULL; tmp = g_slist_next(tmp))
g_free(tmp->data);
g_slist_free(context->list);
}
//close archive
iso9660_close(context->iso);
context->iso = NULL;
}
/* single archive handling */
static bool
iso_open_stream(struct archive_file *file, struct input_stream *is,
const char *pathname)
{
iso_context *context = (iso_context *) file;
//setup file ops
is->plugin = &iso_inputplugin;
//insert back reference
is->data = context;
//we are not seekable
is->seekable = false;
context->statbuf = iso9660_ifs_stat_translate (context->iso, pathname);
if (context->statbuf == NULL) {
g_warning("file %s not found in iso\n", pathname);
return false;
}
context->cur_ofs = 0;
context->max_blocks = CEILING(context->statbuf->size, ISO_BLOCKSIZE);
return true;
}
static void
iso_is_close(struct input_stream *is)
{
iso_context *context = (iso_context *) is->data;
g_free(context->statbuf);
}
static size_t
iso_is_read(struct input_stream *is, void *ptr, size_t size)
{
iso_context *context = (iso_context *) is->data;
int toread, readed = 0;
int no_blocks, cur_block;
size_t left_bytes = context->statbuf->size - context->cur_ofs;
size = (size * ISO_BLOCKSIZE) / ISO_BLOCKSIZE;
if (left_bytes < size) {
toread = left_bytes;
no_blocks = CEILING(left_bytes,ISO_BLOCKSIZE);
} else {
toread = size;
no_blocks = toread / ISO_BLOCKSIZE;
}
if (no_blocks > 0) {
cur_block = context->cur_ofs / ISO_BLOCKSIZE;
readed = iso9660_iso_seek_read (context->iso, ptr,
context->statbuf->lsn + cur_block, no_blocks);
if (readed != no_blocks * ISO_BLOCKSIZE) {
g_warning("error reading ISO file at lsn %lu\n",
(long unsigned int) cur_block );
return -1;
}
if (left_bytes < size) {
readed = left_bytes;
}
context->cur_ofs += readed;
}
return readed;
}
static bool
iso_is_eof(struct input_stream *is)
{
iso_context *context = (iso_context *) is->data;
return (context->cur_ofs == context->statbuf->size);
}
/* exported structures */
static const char *const iso_extensions[] = {
"iso",
NULL
};
static const struct input_plugin iso_inputplugin = {
.close = iso_is_close,
.read = iso_is_read,
.eof = iso_is_eof,
};
const struct archive_plugin iso_plugin = {
.name = "iso",
.open = iso_open,
.scan_reset = iso_scan_reset,
.scan_next = iso_scan_next,
.open_stream = iso_open_stream,
.close = iso_close,
.suffixes = iso_extensions
};
|
