1 /*
2 *
3 * (c) 2005-2009 Laurent Vivier <Laurent@vivier.eu>
4 *
5 * This file has been copied from EMILE, http://emile.sf.net
6 *
7 */
8
9 #include "libiso9660.h"
10
iso9660_is_directory(struct iso_directory_record * idr)11 static inline int iso9660_is_directory(struct iso_directory_record * idr)
12 {
13 return ((idr->flags[0] & 2) != 0);
14 }
15
iso9660_opendir_node(iso9660_VOLUME * volume,struct iso_directory_record * node)16 static iso9660_DIR* iso9660_opendir_node(iso9660_VOLUME *volume, struct iso_directory_record *node)
17 {
18 iso9660_DIR *dir;
19
20 dir = (iso9660_DIR*)malloc(sizeof(iso9660_DIR));
21 if (dir == NULL)
22 return NULL;
23
24 dir->extent = isonum_733((char *)node->extent);
25 dir->len = isonum_733((char *)node->size);
26 dir->index = sizeof (dir->buffer);
27 dir->volume = volume;
28
29 return dir;
30 }
31
idr_new(struct iso_directory_record * idr)32 static struct iso_directory_record* idr_new(struct iso_directory_record* idr)
33 {
34 struct iso_directory_record* result;
35 int size = sizeof(*idr) + (int)idr->name_len[0];
36
37 result = (struct iso_directory_record*)malloc(size);
38 memcpy(result, idr, size);
39
40 return result;
41 }
42
seek_name(iso9660_VOLUME * volume,struct iso_directory_record * idr,char * name)43 static struct iso_directory_record * seek_name(iso9660_VOLUME *volume,
44 struct iso_directory_record *idr,
45 char *name)
46 {
47 struct iso_directory_record *result;
48 char name_buf[256];
49 iso9660_DIR *dir;
50
51 dir = iso9660_opendir_node(volume, idr);
52 if (dir == NULL)
53 return NULL;
54
55 while ((idr = iso9660_readdir(dir)) != NULL)
56 {
57 iso9660_name(volume, idr, name_buf);
58 if (strcasecmp(name, name_buf) == 0)
59 {
60 result = idr_new(idr);
61 iso9660_closedir(dir);
62 return result;
63 }
64 }
65 iso9660_closedir(dir);
66 return NULL;
67 }
68
iso9660_get_node(iso9660_VOLUME * volume,struct iso_directory_record * dirnode,const char * path)69 struct iso_directory_record* iso9660_get_node(
70 iso9660_VOLUME *volume,
71 struct iso_directory_record *dirnode,
72 const char *path)
73 {
74 struct iso_directory_record* result;
75 struct iso_directory_record* current;
76 char name[256];
77 int i;
78
79 current = idr_new(dirnode);
80 while(1)
81 {
82 /* ignore head '\' */
83
84 while (*path && *path == '\\')
85 path++;
86
87 if (*path == 0)
88 break;
89
90 /* extract first path component */
91
92 i = 0;
93 while (*path && *path != '\\')
94 name[i++] = *path++;
95 name[i] = 0;
96
97 /* seek first component in current directory */
98
99 result = seek_name(volume, current, name);
100 if (result == NULL)
101 return NULL;
102
103 free(current);
104 current = result;
105 }
106 return current;
107 }
108
iso9660_opendir(iso9660_VOLUME * volume,const char * name)109 iso9660_DIR* iso9660_opendir(iso9660_VOLUME *volume, const char *name)
110 {
111 iso9660_DIR *dir;
112 struct iso_directory_record *node;
113
114 node = iso9660_get_root_node((iso9660_VOLUME*)volume);
115 if (node == NULL)
116 return NULL;
117
118 node = iso9660_get_node((iso9660_VOLUME*)volume, node, name);
119 if (node == NULL)
120 return NULL;
121 if (!iso9660_is_directory(node)) {
122 free(node);
123 return NULL;
124 }
125
126 dir = iso9660_opendir_node((iso9660_VOLUME*)volume, node);
127
128 free(node);
129
130 dir->volume = (iso9660_VOLUME*)volume;
131
132 return dir;
133 }
134