Il venerdì 17 ottobre 2008 08:18:20 Doriano Blengino ha scritto: > Kari Laine ha scritto: > > Hi All, > > > > could someone please give me a hint how compare two files for binary > > equality? > > I am doing it now int by int basis and it is taking years. I would like > > to read big chunks of both files and compare. > > Also I am thinking a possibility to read whole files in memory at once > > and then compare. > > I think you can read chunks of 256, 512, 1024 or more: > > do > read #file1, s1, -256 > read #file2, s2, -256 > if s1<>s2 then > files_are_different() > break > endif > while len(s1)=256 > > Note the "-256" which reads up to 256 bytes, or up to the end of file. > Ideally, the higher the number the quicker should be, but some > experiment should be done. May be 8192, 16384 or so could do well. > > I didn't try this, however. > > Regards, > Doriano >
If you only want to know if two files are identical, you could use md5sum. Ciao, Stefano > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge Build the coolest Linux based applications with Moblin SDK & win > great prizes Grand prize is a trip for two to an Open Source event anywhere > in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Gambas-user mailing list > Gambas-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/gambas-user ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
