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/*
*
* (c) 2005-2009 Laurent Vivier <Laurent@vivier.eu>
*
* This file has been copied from EMILE, http://emile.sf.net
*
*/
#include "libiso9660.h"
static inline int iso9660_is_directory(struct iso_directory_record * idr)
{
return ((idr->flags[0] & 2) != 0);
}
static iso9660_DIR* iso9660_opendir_node(iso9660_VOLUME *volume, struct iso_directory_record *node)
{
iso9660_DIR *dir;
dir = (iso9660_DIR*)malloc(sizeof(iso9660_DIR));
if (dir == NULL)
return NULL;
dir->extent = isonum_733((char *)node->extent);
dir->len = isonum_733((char *)node->size);
dir->index = sizeof (dir->buffer);
dir->volume = volume;
return dir;
}
static struct iso_directory_record* idr_new(struct iso_directory_record* idr)
{
struct iso_directory_record* result;
int size = sizeof(*idr) + (int)idr->name_len[0];
result = (struct iso_directory_record*)malloc(size);
memcpy(result, idr, size);
return result;
}
static struct iso_directory_record * seek_name(iso9660_VOLUME *volume,
struct iso_directory_record *idr,
char *name)
{
struct iso_directory_record *result;
char name_buf[256];
iso9660_DIR *dir;
dir = iso9660_opendir_node(volume, idr);
if (dir == NULL)
return NULL;
while ((idr = iso9660_readdir(dir)) != NULL)
{
iso9660_name(volume, idr, name_buf);
if (strcasecmp(name, name_buf) == 0)
{
result = idr_new(idr);
iso9660_closedir(dir);
return result;
}
}
iso9660_closedir(dir);
return NULL;
}
struct iso_directory_record* iso9660_get_node(
iso9660_VOLUME *volume,
struct iso_directory_record *dirnode,
const char *path)
{
struct iso_directory_record* result;
struct iso_directory_record* current;
char name[256];
int i;
current = idr_new(dirnode);
while(1)
{
/* ignore head '\' */
while (*path && *path == '\\')
path++;
if (*path == 0)
break;
/* extract first path component */
i = 0;
while (*path && *path != '\\')
name[i++] = *path++;
name[i] = 0;
/* seek first component in current directory */
result = seek_name(volume, current, name);
if (result == NULL)
return NULL;
free(current);
current = result;
}
return current;
}
iso9660_DIR* iso9660_opendir(iso9660_VOLUME *volume, const char *name)
{
iso9660_DIR *dir;
struct iso_directory_record *node;
node = iso9660_get_root_node((iso9660_VOLUME*)volume);
if (node == NULL)
return NULL;
node = iso9660_get_node((iso9660_VOLUME*)volume, node, name);
if (node == NULL)
return NULL;
if (!iso9660_is_directory(node)) {
free(node);
return NULL;
}
dir = iso9660_opendir_node((iso9660_VOLUME*)volume, node);
free(node);
dir->volume = (iso9660_VOLUME*)volume;
return dir;
}
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