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125 lines
4.0 KiB
Plaintext
125 lines
4.0 KiB
Plaintext
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============================================================================
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miniLZO -- mini subset of the LZO real-time data compression library
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============================================================================
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Author : Markus Franz Xaver Johannes Oberhumer
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<markus@oberhumer.com>
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http://www.oberhumer.com/opensource/lzo/
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Version : 2.06
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Date : 12 Aug 2011
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I've created miniLZO for projects where it is inconvenient to
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include (or require) the full LZO source code just because you
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want to add a little bit of data compression to your application.
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miniLZO implements the LZO1X-1 compressor and both the standard and
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safe LZO1X decompressor. Apart from fast compression it also useful
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for situations where you want to use pre-compressed data files (which
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must have been compressed with LZO1X-999).
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miniLZO consists of one C source file and three header files:
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minilzo.c
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minilzo.h, lzoconf.h, lzodefs.h
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To use miniLZO just copy these files into your source directory, add
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minilzo.c to your Makefile and #include minilzo.h from your program.
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Note: you also must distribute this file ('README.LZO') with your project.
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minilzo.o compiles to about 6 KiB (using gcc or Visual C on an i386), and
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the sources are about 30 KiB when packed with zip - so there's no more
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excuse that your application doesn't support data compression :-)
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For more information, documentation, example programs and other support
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files (like Makefiles and build scripts) please download the full LZO
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package from
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http://www.oberhumer.com/opensource/lzo/
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Have fun,
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Markus
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P.S. minilzo.c is generated automatically from the LZO sources and
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therefore functionality is completely identical
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Appendix A: building miniLZO
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----------------------------
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miniLZO is written such a way that it should compile and run
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out-of-the-box on most machines.
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If you are running on a very unusual architecture and lzo_init() fails then
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you should first recompile with '-DLZO_DEBUG' to see what causes the failure.
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The most probable case is something like 'sizeof(void *) != sizeof(size_t)'.
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After identifying the problem you can compile by adding some defines
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like '-DSIZEOF_VOID_P=8' to your Makefile.
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The best solution is (of course) using Autoconf - if your project uses
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Autoconf anyway just add '-DMINILZO_HAVE_CONFIG_H' to your compiler
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flags when compiling minilzo.c. See the LZO distribution for an example
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how to set up configure.ac.
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Appendix B: list of public functions available in miniLZO
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---------------------------------------------------------
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Library initialization
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lzo_init()
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Compression
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lzo1x_1_compress()
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Decompression
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lzo1x_decompress()
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lzo1x_decompress_safe()
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Checksum functions
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lzo_adler32()
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Version functions
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lzo_version()
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lzo_version_string()
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lzo_version_date()
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Portable (but slow) string functions
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lzo_memcmp()
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lzo_memcpy()
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lzo_memmove()
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lzo_memset()
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Appendix C: suggested macros for 'configure.ac' when using Autoconf
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-------------------------------------------------------------------
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Checks for typedefs and structures
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AC_CHECK_TYPE(ptrdiff_t,long)
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AC_TYPE_SIZE_T
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AC_CHECK_SIZEOF(short)
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AC_CHECK_SIZEOF(int)
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AC_CHECK_SIZEOF(long)
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AC_CHECK_SIZEOF(long long)
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AC_CHECK_SIZEOF(__int64)
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AC_CHECK_SIZEOF(void *)
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AC_CHECK_SIZEOF(size_t)
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AC_CHECK_SIZEOF(ptrdiff_t)
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Checks for compiler characteristics
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AC_C_CONST
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Checks for library functions
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AC_CHECK_FUNCS(memcmp memcpy memmove memset)
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Appendix D: Copyright
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---------------------
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LZO and miniLZO are Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001,
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2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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Markus Franz Xaver Oberhumer <markus@oberhumer.com>.
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LZO and miniLZO are distributed under the terms of the GNU General
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Public License (GPL). See the file COPYING.
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Special licenses for commercial and other applications which
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are not willing to accept the GNU General Public License
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are available by contacting the author.
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