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ntfs-3g
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New API's ntfs_runlist_sparse and ntfs_rl_get_compressed_size. 

(Logical change 1.632)
edge.strict_endians
(none)!yura 2004-11-12 17:09:24 +00:00
parent 9a7dd7f07b
commit 38be5f3e95
1 changed files with 61 additions and 0 deletions
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61
libntfs/runlist.c
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@ -1623,3 +1623,64 @@ int ntfs_rl_truncate(runlist **arl, const VCN start_vcn)
/* Done! */
return 0;
}
/**
* ntfs_runlist_sparse - check whether runlist have sparse regions or not.
* @rl: runlist to check
*
* Return 1 if have, 0 if not, -1 on error with errno set to the error code.
*/
int ntfs_rl_sparse(runlist *rl)
{
runlist *rlc;
if (!rl) {
Dprintf("%s(): Ivalid argument passed.\n");
errno = EINVAL;
return -1;
}
for (rlc = rl; rlc->length; rlc++)
if (rlc->lcn < 0) {
if (rlc->lcn != LCN_HOLE) {
Dprintf("%s(): Recevied unmapped runlist.\n",
__FUNCTION__);
errno = EINVAL;
return -1;
}
return 1;
}
return 0;
}
/**
* ntfs_runlist_get_compressed_size - calculate length of non sparse regions
* @vol: ntfs volume (need for cluster size)
* @rl: runlist to calculate for
*
* Return compressed size or -1 on error with errno set to the error code.
*/
s64 ntfs_rl_get_compressed_size(ntfs_volume *vol, runlist *rl)
{
runlist *rlc;
s64 ret = 0;
if (!rl) {
Dprintf("%s(): Ivalid argument passed.\n");
errno = EINVAL;
return -1;
}
for (rlc = rl; rlc->length; rlc++) {
if (rlc->lcn < 0) {
if (rlc->lcn != LCN_HOLE) {
Dprintf("%s(): Recevied unmapped runlist.\n",
__FUNCTION__);
errno = EINVAL;
return -1;
}
} else
ret = rlc->length << vol->cluster_size_bits;
}
return ret;
}