On 12/09/2009 04:57 AM, Mikhail Gusarov wrote: > > Twas brillig at 21:18:18 08.12.2009 UTC-05 when behdad@xxxxxxxxxx did gyre and gimble: > > >> 1) scan directory and subdirectories and use max(mtimes, ctimes) of > >> all files as mtime of directory. > > BE> Would be a PITA. > > >> 2) add "hash" field to directory cache which is hash of all > >> subdirectories' hashes and directory contents. > > BE> Isn't option #1 superior to this? And doesn't need a change to the > BE> cache format. > > I've came up with the following scenario: > > dir/ > foo.ttf (mtime=5,ctime=5) > > otherdir/ > bar.ttf (mtime=4,ctime=4) > > mv otherdir/bar.ttf dir => > > dir/ > foo.ttf (mtime=5,ctime=5) > bar.ttf (mtime=4,ctime=4) > > First variant will fail to detect new font in dir/ in this case, as > Windows does not change any timestamp on moved file. > > Also, it should be possible to reuse mtime field in cache file for a > hash (32-bit one, as cryptographical sthrength is not necessary here). Right. Since we only compare mtime for equality, we can simply use it as the directory hash. Thanks, behdad _______________________________________________ Fontconfig mailing list Fontconfig@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/fontconfig
