diff options
Diffstat (limited to 'gl/lib/di-set.c')
-rw-r--r-- | gl/lib/di-set.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gl/lib/di-set.c b/gl/lib/di-set.c index 05d24d609..5e839a311 100644 --- a/gl/lib/di-set.c +++ b/gl/lib/di-set.c @@ -235,3 +235,25 @@ di_set_insert (struct di_set *dis, dev_t dev, ino_t ino) /* Put I into the inode set. */ return hash_insert0 (ino_set, (void *) i, NULL); } + +/* Look up the DEV,INO pair in the set DIS. + If found, return 1; if not found, return 0. + Upon any failure return -1. */ +int +di_set_lookup (struct di_set *dis, dev_t dev, ino_t ino) +{ + hashint i; + + /* Map the device number to a set of inodes. */ + struct hash_table *ino_set = map_device (dis, dev); + if (! ino_set) + return -1; + + /* Map the inode number to a small representative I. */ + i = map_inode_number (dis, ino); + if (i == INO_MAP_INSERT_FAILURE) + return -1; + + /* Perform the look-up. */ + return !!hash_lookup (ino_set, (void const *) i); +} |