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66 lines
2.7 KiB
Markdown
66 lines
2.7 KiB
Markdown
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Travis CI: [](https://travis-ci.org/Dead2/zlib-ng/)
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zlib-ng - zlib for the next generation systems
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Maintained by Hans Kristian Rosbach
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aka Dead2 (zlib-ng àt circlestorm dót org)
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Fork Motivation and History
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---------------------------
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The motivation for this fork was due to seeing several 3rd party
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contributions containing new optimizations not getting implemented
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into the official zlib repository.
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Mark Adler has been maintaining zlib for a very long time, and he has
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done a great job and hopefully he will continue for a long time yet.
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The idea of zlib-ng is not to replace zlib, but to co-exist as a
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drop-in replacement with a lower threshold for code change.
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zlib has a long history and is incredibly portable, even supporting
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lots of systems that predate the Internet. This is great, but it does
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complicate further development and maintainability.
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The zlib code has to make numerous workarounds for old compilers that
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do not understand ANSI-C or to accommodate systems with limitations
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such as operating in a 16-bit environment.
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Many of these workarounds are only maintenance burdens, some of them
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are pretty huge code-wise. For example, the [v]s[n]printf workaround
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code has a whopping 8 different implementations just to cater to
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various old compilers. With this many workarounds cluttered throughout
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the code, new programmers with an idea/interest for zlib will need
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to take some time to figure out why all of these seemingly strange
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things are used, and how to work within those confines.
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So I decided to make a fork, merge all the Intel optimizations, merge
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the Cloudflare optimizations that did not conflict, plus a couple
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of other smaller patches. Then I started cleaning out workarounds,
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various dead code, all contrib and example code as there is little
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point in having those in this fork for different reasons.
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Lastly I have been cleaning up the handling of different arches,
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so that it will be easier to implement arch-specific code without
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cluttering up the main code too much.
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Now, there is still a lot to do and I am sure there are better ways
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of doing several of the changes I have done. And I would be delighted
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to receive patches, preferably as pull requests on github.
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Just remember that any code you submit must be your own and it must
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be zlib licensed.
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Please read LICENSE.md, it is very simple and very liberal.
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Acknowledgments
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----------------
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Big thanks to Raske Sider AS / raskesider.no for sponsoring my
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maintainership of zlib-ng.
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The deflate format used by zlib was defined by Phil Katz.
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The deflate and zlib specifications were written by L. Peter Deutsch.
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zlib was originally created by Jean-loup Gailly (compression)
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and Mark Adler (decompression).
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