How to decompress gzip stream with zlib

How to decompress gzip stream with zlib

How to decompress gzip stream with zlib

I'm posting this in my journal because it trips me up every time I have to do this, and I need something googleable so I can easily find this info next time.

To decompress a GZIP format file with zlib, callInflateinit2WithWindowbitsParameter16 + max_wbits, Like this:

Inflateinit2 (& stream, 16 + max_wbits );

If you don't do this, zlib will complain about a bad stream format. by default, zlib creates streams with a zlib header, and on inflate does not recognize the different gzip header unless you tell it so. although this is already ented starting in version 1.2.1 ofZlib. hHeader file, it is not in the zlib manual.

Update: I 've added this as a question (and answer !) On Stack Overflow: How can I decompress a gzip stream with zlib?