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author | peter <peter@FreeBSD.org> | 1996-08-18 17:54:27 +0000 |
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committer | peter <peter@FreeBSD.org> | 1996-08-18 17:54:27 +0000 |
commit | 70c83c0586d07013fa8b7756f44d5ec3839b1db0 (patch) | |
tree | ce8fa1b80a1478f3869ad9324fb5d62892f66e07 /lib/libz/README | |
download | FreeBSD-src-70c83c0586d07013fa8b7756f44d5ec3839b1db0.zip FreeBSD-src-70c83c0586d07013fa8b7756f44d5ec3839b1db0.tar.gz |
Initial import of zlib-1.0.4
Diffstat (limited to 'lib/libz/README')
-rw-r--r-- | lib/libz/README | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/lib/libz/README b/lib/libz/README new file mode 100644 index 0000000..28adc90 --- /dev/null +++ b/lib/libz/README @@ -0,0 +1,99 @@ +zlib 1.0.4 is a general purpose data compression library. All the code +is reentrant (thread safe). The data format used by the zlib library +is described by RFCs (Request for Comments) 1950 to 1952 in the files +ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate +format) and rfc1952.txt (gzip format). These documents are also available in +other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html + +All functions of the compression library are documented in the file +zlib.h. A usage example of the library is given in the file example.c +which also tests that the library is working correctly. Another +example is given in the file minigzip.c. The compression library itself +is composed of all source files except example.c and minigzip.c. + +To compile all files and run the test program, follow the instructions +given at the top of Makefile. In short "make test; make install" +should work for most machines. For MSDOS, use one of the special +makefiles such as Makefile.msc; for VMS, use Make_vms.com or descrip.mms. + +Questions about zlib should be sent to <zlib@quest.jpl.nasa.gov> or, +if this fails, to the addresses given below in the Copyright section. +The zlib home page is http://quest.jpl.nasa.gov/zlib/ + +The changes made in version 1.0.4 are documented in the file ChangeLog. +The main changes since 1.0.3 are: + +- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF + bit, so the decompressor could decompress all the correct data but went + on to attempt decompressing extra garbage data. This affected minigzip too. +- zlibVersion and gzerror return const char* (needed for DLL) +- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno) + + +A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk> +is in the CPAN (Comprehensive Perl Archive Network) sites, such as: +ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib* + + +Notes for some targets: + +- For Turbo C the small model is supported only with reduced performance to + avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3 + +- For 64-bit Iris, deflate.c must be compiled without any optimization. + With -O, one libpng test fails. The test works in 32 bit mode (with + the -32 compiler flag). The compiler bug has been reported to SGI. + +- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 + it works when compiled with cc. + +- zlib doesn't work on HP-UX 9.05 with one cc compiler (the one not + accepting the -O option). It works with the other cc compiler. + +- To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc + and all .c files except example.c and minigzip.c; compile with -DZLIB_DLL + For help on building a zlib DLL, contact Alessandro Iacopetti + <iaco@email.alessandria.alpcom.it> http://lisa.unial.it/iaco , + or contact Brad Clarke <bclarke@cyberus.ca>. + +- gzdopen is not supported on RISCOS + + +Acknowledgments: + + The deflate format used by zlib was defined by Phil Katz. The deflate + and zlib specifications were written by Peter Deutsch. Thanks to all the + people who reported problems and suggested various improvements in zlib; + they are too numerous to cite here. + +Copyright notice: + + (C) 1995-1996 Jean-loup Gailly and Mark Adler + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. + + Jean-loup Gailly Mark Adler + gzip@prep.ai.mit.edu madler@alumni.caltech.edu + +If you use the zlib library in a product, we would appreciate *not* +receiving lengthy legal documents to sign. The sources are provided +for free but without warranty of any kind. The library has been +entirely written by Jean-loup Gailly and Mark Adler; it does not +include third-party code. + +If you redistribute modified sources, we would appreciate that you include +in the file ChangeLog history information documenting your changes. |