[Insight-users] Image index limits

[Robert.Atwood at diamond.ac.uk]

 Hi Alex et. al:
I developed a fix for the problem in itkAnalyzeImageIO.cxx , it seems to
work for me both with compressed and uncompressed .img files


I'm not sure if it strictly satisfies code style requirements for itk
but if anyone could help it satisfy these then perhaps it could be
implemented? 

The fixes:
1. Test the return value of gzread to ensure correct data amount is read
and no other error has occurred. Throws exception if the return value is
0 or -1.

2. Only read a chunk of size < (2^32 - 2 ) at a time (defined by a macro
.. ) . Loop through the chunks if the file is bigger than this.

I've tested this with small (10Mb) chunk size on compressed .img.gz and
uncompressed .img files of the 5Gb output (uncompressed) from Alex's
ImageFill_Cube and the results appear correct. 

I hope this helps!

Robert  



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