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2011.01.10 16:47 "[libtiff v3.9.4] TIFFClientOpen() & 'w' mode", by <imol00@gmail.com>
[Sending again since it didn't seem to make it to the list.]
I've been trying to track down a problem with writing TIFF files to a
networked drive using Qt and I ran across an oddity in
TIFFClientOpen(). Don't think it has anything to do with my problem,
but I'm curious.
If called with mode == 'w':
...
m = _TIFFgetMode(mode, module);
// m will be O_RDWR|O_CREAT|O_TRUNC
...
tif->tif_mode = m &~ (O_CREAT|O_TRUNC);
// tif->tif_mode will be O_RDWR
...
/*
* Read in TIFF header.
*/
if (tif->tif_mode & O_TRUNC ||
!ReadOK(tif, &tif->tif_header, sizeof (TIFFHeader))) {
...
If I'm reading the code correctly, tif->tif_mode & O_TRUNC in the if
statement will always be false. So shouldn't that be m & O_TRUNC?
Thanks for any insight.
-- Andy
[After writing this I found a post from 2005 about this:
http://www.asmail.be/msg0055533963.html but I don't think his
solution can be correct...]