int
fat_dir_entry_has_first_cluster (FatDirEntry* dir_entry, PedFileSystem* fs)
{
FatSpecific* fs_info = FAT_SPECIFIC (fs);
FatCluster first_cluster;
if (!fat_dir_entry_is_file (dir_entry)
&& !fat_dir_entry_is_directory (dir_entry))
return 0;
first_cluster = fat_dir_entry_get_first_cluster (dir_entry, fs);
if (first_cluster == 0
|| fat_table_is_eof (fs_info->fat, first_cluster))
return 0;
return 1;
}
/* Recursively builds (i.e. makes consistent) the duplicated directory tree
* (leaving the original directory tree in tact)
*/
static int
fat_construct_directory (FatOpContext* ctx, FatTraverseInfo* trav_info)
{
FatTraverseInfo* sub_dir_info;
FatDirEntry* dir_entry;
FatCluster old_first_cluster;
while ( (dir_entry = fat_traverse_next_dir_entry (trav_info)) ) {
if (fat_dir_entry_is_null_term (dir_entry))
break;
if (!fat_dir_entry_has_first_cluster (dir_entry, ctx->old_fs))
continue;
fat_traverse_mark_dirty (trav_info);
old_first_cluster = fat_dir_entry_get_first_cluster (dir_entry,
ctx->old_fs);
fat_dir_entry_set_first_cluster (dir_entry, ctx->new_fs,
fat_op_context_map_cluster (ctx, old_first_cluster));
if (fat_dir_entry_is_directory (dir_entry)
&& dir_entry->name [0] != '.') {
sub_dir_info
= fat_traverse_directory (trav_info, dir_entry);
if (!sub_dir_info)
return 0;
if (!fat_construct_directory (ctx, sub_dir_info))
return 0;
}
}
/* remove "stale" entries at the end */
while ((dir_entry = fat_traverse_next_dir_entry (trav_info))) {
memset (dir_entry, 0, sizeof (FatDirEntry));
fat_traverse_mark_dirty (trav_info);
}
fat_traverse_complete (trav_info);
return 1;
}
/* Converts the root directory between FAT16 and FAT32. NOTE: this code
* can also do no conversion. I'm leaving fat_construct_directory(), because
* it's really pretty :-) It also leaves a higher chance of deleted file
* recovery, because it doesn't remove redundant entries. (We do this here,
* because brain-damaged FAT16 has an arbitary limit on root directory entries,
* so we save room)
*/
static int
fat_convert_directory (FatOpContext* ctx, FatTraverseInfo* old_trav,
FatTraverseInfo* new_trav)
{
FatTraverseInfo* sub_old_dir_trav;
FatTraverseInfo* sub_new_dir_trav;
FatDirEntry* new_dir_entry;
FatDirEntry* old_dir_entry;
FatCluster old_first_cluster;
while ( (old_dir_entry = fat_traverse_next_dir_entry (old_trav)) ) {
if (fat_dir_entry_is_null_term (old_dir_entry))
break;
if (!fat_dir_entry_is_active (old_dir_entry))
continue;
new_dir_entry = fat_traverse_next_dir_entry (new_trav);
if (!new_dir_entry) {
return ped_exception_throw (PED_EXCEPTION_ERROR,
PED_EXCEPTION_IGNORE_CANCEL,
_("There's not enough room in the root "
"directory for all of the files. Either "
"cancel, or ignore to lose the files."))
== PED_EXCEPTION_IGNORE;
}
*new_dir_entry = *old_dir_entry;
fat_traverse_mark_dirty (new_trav);
if (!fat_dir_entry_has_first_cluster (old_dir_entry,
ctx->old_fs))
continue;
old_first_cluster = fat_dir_entry_get_first_cluster (
old_dir_entry, ctx->old_fs);
fat_dir_entry_set_first_cluster (new_dir_entry, ctx->new_fs,
fat_op_context_map_cluster (ctx, old_first_cluster));
if (fat_dir_entry_is_directory (old_dir_entry)
&& old_dir_entry->name [0] != '.') {
sub_old_dir_trav
= fat_traverse_directory (old_trav, old_dir_entry);
sub_new_dir_trav
= fat_traverse_directory (new_trav, new_dir_entry);
if (!sub_old_dir_trav || !sub_new_dir_trav)
return 0;
if (!fat_convert_directory (ctx, sub_old_dir_trav,
sub_new_dir_trav))
return 0;
}
}
/* remove "stale" entries at the end, just in case there is some
* overlap
*/
while ((new_dir_entry = fat_traverse_next_dir_entry (new_trav))) {
memset (new_dir_entry, 0, sizeof (FatDirEntry));
fat_traverse_mark_dirty (new_trav);
}
fat_traverse_complete (old_trav);
fat_traverse_complete (new_trav);
return 1;
}
