AWARE [SYSTEMS]
AWare Systems, Home TIFF and LibTiff Mail List Archive

LibTiff Mailing List

TIFF and LibTiff Mailing List Archive
November 2018

Previous Thread
Next Thread

Previous by Thread
Next by Thread

Previous by Date
Next by Date

Contact

The TIFF Mailing List Homepage
Archive maintained by AWare Systems



New Datamatrix section



Valid HTML 4.01!



Thread

2018.11.10 19:39 "[Tiff] Libtiff 4.0.10 is now available", by Bob Friesenhahn
2018.12.11 18:54 "Re: [Tiff] SeekOK and WriteOK", by Bob Friesenhahn
2018.12.11 14:24 "Re: [Tiff] SeekOK and WriteOK", by Emmanuel Cosnard
2018.12.12 08:53 "Re: [Tiff] SeekOK and WriteOK", by Emmanuel Cosnard
2018.12.13 11:04 "Re: [Tiff] SeekOK and WriteOK", by Emmanuel Cosnard
[...]

2018.12.12 08:53 "Re: [Tiff] SeekOK and WriteOK", by Emmanuel Cosnard

I actually noticed that I never get any problem with the SeekOK, but only with writeOK.

I sometimes returns -1 although he wrote everything I wanted to, and sometimes returns -1 and doesn't write anything but I have no clue why on some occasions he doesn't write...

________________________________
De: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
Envoyé: mardi 11 décembre 2018 18:54
À: Nicolas RUFF
Cc: emmanuel.cosnard@outlook.fr; tiff@lists.osgeo.org
Objet: Re: [Tiff] SeekOK and WriteOK

On Tue, 11 Dec 2018, Nicolas RUFF wrote:

> This might be by design of the API :)
> http://bugzilla.maptools.org/show_bug.cgi?id=2726
>
> lseek() returns -1 in both cases:
> - lseek(-1, SEEK_SET)
> - An error occurred
>
> You have to clear then check errno to distinguish between cases.

One approach is to call 'lseek(fd,SEEK_CUR)' and verify that the
return value is the expected offset.

Bob
--
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
Public Key, http://www.simplesystems.org/users/bfriesen/public-key.txt