File pointer backend for mvs support #239
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added 5 commits
March 15, 2017 16:24
…nition of Z_HAVE_STDARG_H
thus allowing zlib to be compiled on MVS again (for the first time since 1.2.3). Adds gzfopen (like gzdopen but for file pointer) and gzopen_fp (like gzopen but based on file pointer) and some internal functions.
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I added some parallel functions based on file pointers rather than file descriptors, so that zlib can be compiled and used on MVS again for the first time since version 1.2.3. The company that I work for has used zlib on MVS for many years, but wasn't able to upgrade zlib since version 1.2.3 because the file-pointer-based back-end was dropped after that version, and file descriptors aren't supported on our mainframe.
I did this work on company time, and have permission from the directors to donate the results here.
Regards,
Louis Strous