bug#15325: How does gzip reads/writes data from/to the file.

[ddun]

Hello,

I am trying to figure out what functions does gzip uses to read/write the
data to/from the files. I saw that for error cases gzip was using *fprintf
(stderr.. *but saw no fread/fscanf functions anywhere in the code.
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Can anyone point out the functions used by gzip to read/write to a file and
in which code file are they.
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Thanks* *