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zlib 1.2.8

A Massively Spiffy Yet Delicately Unobtrusive Compression Library

 

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zlib 1.2.8 facilities

Vendor
Vendor`s Webhttp://zlib.net
Zlib webshot
OSWindows 98, Windows 2000, Windows XP, Windows Vista, Windows 7, Linux, Unix
Limitationsnot specified
Actualizedmore than year ago
Downloads819
LocalizedEnglish
LicenseOpen source
Snapshotzlib snapshot
Snapshot of zlib

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zlib manufacturer description

zlib 1.2.8 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. The zlib Components & libraries data format is itself portable across platforms. Unlike the LZW compression method used in Unix compress(1) and in the GIF image format, the compression method currently used in zlib essentially never expands the data. (LZW can double or triple the file size in extreme cases.) zlib`s memory footprint is also independent of the input data and can be reduced, if necessary, at some cost in compression. A more precise, technical discussion of both points is available on another page.
zlib download was written by Jean-loup Gailly (compression) and Mark Adler (decompression). Jean-loup is also the primary author/maintainer of gzip(1), the author of the comp.compression FAQ list and the former maintainer of Info-ZIP`s Zip; Mark is also the author of gzip`s and UnZip`s main decompression routines and was the original author of Zip. Not surprisingly, the compression algorithm used in zlib is essentially the same as that in gzip and Zip, namely, the `deflate` method that originated in PKWARE`s PKZIP 2.x.
Mark and Jean-loup can be reached by e-mail at . Please read the FAQ and the manual before asking us for help. We are getting too many questions which already have an answer in the zlib documentation.
Greg, Mark and/or Jean-loup will add some more stuff here when they think of something to add. For now this page is mainly a pointer to zlib itself and to the official zlib and deflate documentation. Note that the specifications both achieved official Internet RFC status in May 1996, and zlib itself was adopted in version 1.1 of the Java Development Kit (JDK), both as a raw class and as a component of the JAR archive format.
The lovely zlib-vise image above was provided courtesy of Bruce Gardner, art director of Dr. Dobb`s Journal. It appears in Mark Nelson`s article in the January 1997 issue (see below).
free download zlib 1.2.8QUICK DOWNLOAD
Free download zlib 1.2.8
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zlib categories

Compressing File-I, compression library, O Library, zlib

What is new in 1.2.8 changeinfo log

  • Add new inflateGetDictionary() function
  • Fix bug where gzopen() immediately followed by gzclose() would write an empty file instead of an empty gzip stream.
  • Fix bug in gzclose() when gzwrite() runs out of memory

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