The ZIP packer of DFIncBackup program using general
purpose compression library ZLIB. ZLIB was written by
Jean-loup Gailly (compression) and
Mark Adler
(decompression). This library contain general routines for ZIP files
management. ZLIB is designed to be a free, general-purpose, legally
unencumbered -- that is, not covered by any patents -- lossless
data-compression library for use on virtually any computer hardware
and operating system.
You can find source and compiled versions of ZLIB
library on internet site
ftp://ftp.uu.net/pub/archiving/zip/zlib/.