CFITSIO is a library of C and Fortran subroutines for
reading and writing data files in the FITS (Flexible Image
Transport System) data format. It simplifies the task of
writing software that deals with FITS files by providing an
easy to use set of high-level routines that insulate the
programmer from the internal complexities of the FITS file
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A 32-bit limitation on low-level table reads was removed. Much faster byte-swapping algorithms were implemented, accelerating FITS on little-endian machines. Data type conversion on losslessly compressed files was improved. Support for IBM System Z mainframes was improved. Numerous bugs were fixed.
This release restores support for tile compression of 1-byte integer images. It modifies the command line parsing routine to perform more rigorous checks to determine if the token can be interpreted as a number or not. It adds support for reading and writing large FITS files (> 2.1 GB) when building CFITSIO using Microsoft Visual C++ on Windows platforms. There are numerous bugfixes.
In cases where an image tile cannot be quantized, the floating-point pixel values will be losslessly compressed with gzip before writing them to the tile-compressed file. Significant internal changes have been made to the structure of the tile compression and uncompression routines to make them more modular and easier to maintain. The ffiter function has been modified to properly clean up allocated memory if an error occurs.