Zip-Ada is a free, open-source programming library for dealing with the Zip compressed archive file format. The full sources of Zip-Ada are in Ada, compilable on every compiler and for every system (*).

Key features of Zip-Ada:

• Files and streams supported, for archives and entries, for compression and decompression
• Task safe
• Endian-neutral
• Standalone
• Zip methods supported for compression: Reduce, Shrink, Deflate, BZip2, LZMA.
• Zip methods supported for decompression: the above methods, plus: Implode, Deflate64
• Library is in pure Ada 2012 (nothing compiler/system specific), can be used in projects in Ada 2012 and later versions of the language
• Unconditionally portable: OS-, CPU-, compiler- independent code (*)
• Tests and demos included
• Free, open-source

The library includes LZMA & BZip2 independant encoder & decoder pairs (can be used outside of the Zip archive context).

Note that the BZip2 encoder is the best of its kind in terms of compression ratio!

(*) within limits of compiler’s provided integer types and target architecture capacity.