• Standalone (no dependency).
• Pure Ada 2012 (nothing compiler/system specific); can be used in projects in Ada 2012 and later language versions.
• Unconditionally portable: compilable on every Ada compiler and for every system ^(*).
• Files and memory streams supported, for archives and entries, for compression and decompression.
• Task safe.
• Endian-neutral.
• Zip methods supported for compression: Reduce, Shrink, Deflate, BZip2, LZMA.
• Zip methods supported for decompression: the above methods, plus: Implode, Deflate64.
• Tests and demos included.
• Permissive license (MIT).
• Free, open-source.

• Independence:
  with this library you can zip and unzip data without any OS-dependent external call.
  Furthermore, you can use Zip-Ada with any data stream instead of files, for the archives as well as for the archived entries.
• Unconditional portability ^(*):
  • the C code has "only" been widely ported, with specific source parts (via conditional compilation) for different Operating Systems and compilers;
  • a single Ada source code set produces a native Zip/UnZip in machine code for every OS, with every Ada compiler - no "header hell", nothing to configure (sceptic ? click here to see a list of reportedly successfully tested environments).
• No effort of interfacing: interfacing is a frequent source of maintenance troubles, compatibility issues and portability constraints.
  With Zip-Ada, it is possible to have full-Ada projects using Zip archives, all compiled by a single compiler.
• Transparency: full sources are visible; it is easier to verify and customize.
• Benefit from the powerful LZMA and BZip2 compression formats, which are not available in zlib and zlib-based Zip tools (they are limited to the weaker Deflate format).
  Additionally, Zip-Ada provides the Preselection algorithm-picking method for compressing data depending on their type and size.
• Zip-Ada can use an archive as a read-only file system. Since the archive itself can be stored in memory, Zip-Ada can even work as a RAM-disk.

Download the library from the SourceForge project page.

• get the corresponding crate on Alire; for details, click here: 
• check the mirror on GitHub.

• The full library Ada sources inside one directory, Zip_Lib.
• Within the Zip_Lib library:
  • a standalone generic streaming LZ77 encoder (can be used outside of the Zip context)
  • standalone generic streaming BZip2 encoder and decoder (can be used outside of the Zip context).
  • standalone generic streaming LZMA encoder and decoder (can be used outside of the Zip context).
• Some command-line demos, and the following tools:
  • ZipAda, a tool that creates a compressed Zip archive.
  • UnZipAda, a tool that extracts some or all files from a Zip archive.
  • Comp_Zip, an utility for comparing two Zip archives (compare contents, check missing files).
  • Find_Zip, an utility for searching a text string across contents of a Zip archive.
  • ReZip, a tool for recompressing Zip archives towards optimal compression.
  • bzip2_enc and bzip2_dec, a tool pair that encodes/decodes BZip2 compressed files (.bz2).
  • lzma_enc and lzma_dec, a tool pair that encodes/decodes LZMA compressed files (.lzma).

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