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May 2005
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2005.05.31 23:46 "Re: hot to detect corrupt tif file", by Bruno Ledoux
Hi Gordon,
Not sure exactly what you mean by "corrupt tiff file".
If you want to check that the CONTENT of a TIFF file hasn't been altered,
you will have to use an external CRC method like MD5 as there is no such
thing as a checksum in the TIFF format.
If you want to determine the file format , you can use
TIFFOpen("file_to_check","r"). If it returns NULL it means the file is NOT a
TIFF file. If you want to perform more detailed checks it going to be more
complex considering the number of different tag formats.
HTH,
Bruno.