Zip:

These routines are taken from the GNU zip source which compresses and decompresses files in the gzip format. This has been modified for DDS usage in September 2007.

Files:
    z_zip.c 
    z_unzip.c 
    z_deflate.c 
    z_inflate.c 
    z_trees.c 
    z_bits.c 
    z_util.c