[vtkusers] Problem in reading more than 1000 files by vtk readers

[Robert Maynard]

The fixes to having dangling file handles and the incorrect rewinding of
tecplot files
has been fixed on VTK master.

You are correct in that gz_rewind doesn't fully rewind the file, so instead
we are
closing and reopening the file.

On Sat, Feb 11, 2012 at 1:48 AM, Ahmad <falahatpisheh at gmail.com> wrote:

> Excellent catch. That fixed the problem of file handling. The thing is that
> for some reason the rewinding does not work properly. it does not
> completely
> rewound to the beginning of the file. Since my Tecplot file has comments in
> the first few lines, the rewound position will be positioned in the middle
> of the comments (in my case s->start=320 in gz_open function) and a lot of
> errors will be printed on the screen indicating "unknown format found in
> the
> file". This significantly slows down the reading of 1000 files. Can you
> please help me with that?
>
> The solution that I found is as follows which works fine for me. But I am
> not sure if this reduce the generality of the library.
>
> In gz_open function in gzio.c file, I found out that in my case
> s->start=320. Can I have your opinion about setting this to s->start=0 to
> completely rewind to the beginning of the file and not skip the header?
>
> Is it really necessary to rewind the file? Isn't it better to close and
> open
> a new one? Is it because of speed? Please let me know. Thank you.
>
> --
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-- 
Robert Maynard
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