Merging upstream version 1.5~rc1.
Signed-off-by: Daniel Baumann <daniel@debian.org>
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21 changed files with 318 additions and 279 deletions
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doc/lzlib.info
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doc/lzlib.info
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@ -3,7 +3,7 @@ lzlib.texinfo.
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INFO-DIR-SECTION Data Compression
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START-INFO-DIR-ENTRY
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* Lzlib: (lzlib). A compression library for lzip files
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* Lzlib: (lzlib). Compression library for lzip files
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END-INFO-DIR-ENTRY
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@ -12,22 +12,22 @@ File: lzlib.info, Node: Top, Next: Introduction, Up: (dir)
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Lzlib Manual
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************
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This manual is for Lzlib (version 1.4, 28 May 2013).
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This manual is for Lzlib (version 1.5-rc1, 28 July 2013).
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* Menu:
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* Introduction:: Purpose and features of Lzlib
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* Library Version:: Checking library version
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* Library version:: Checking library version
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* Buffering:: Sizes of Lzlib's buffers
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* Parameter Limits:: Min / max values for some parameters
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* Compression Functions:: Descriptions of the compression functions
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* Decompression Functions:: Descriptions of the decompression functions
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* Error Codes:: Meaning of codes returned by functions
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* Error Messages:: Error messages corresponding to error codes
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* Data Format:: Detailed format of the compressed data
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* Parameter limits:: Min / max values for some parameters
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* Compression functions:: Descriptions of the compression functions
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* Decompression functions:: Descriptions of the decompression functions
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* Error codes:: Meaning of codes returned by functions
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* Error messages:: Error messages corresponding to error codes
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* Data format:: Detailed format of the compressed data
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* Examples:: A small tutorial with examples
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* Problems:: Reporting bugs
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* Concept Index:: Index of concepts
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* Concept index:: Index of concepts
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Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
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@ -36,7 +36,7 @@ This manual is for Lzlib (version 1.4, 28 May 2013).
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copy, distribute and modify it.
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File: lzlib.info, Node: Introduction, Next: Library Version, Prev: Top, Up: Top
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File: lzlib.info, Node: Introduction, Next: Library version, Prev: Top, Up: Top
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1 Introduction
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**************
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@ -46,6 +46,10 @@ and decompression functions, including integrity checking of the
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decompressed data. The compressed data format used by the library is the
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lzip format. Lzlib is written in C.
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The lzip file format is designed for long-term data archiving. It is
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clean, provides very safe 4 factor integrity checking, and is backed by
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the recovery capabilities of lziprecover.
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The functions and variables forming the interface of the compression
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library are declared in the file `lzlib.h'. Usage examples of the
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library are given in the files `main.c' and `bbexample.c' from the
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@ -73,14 +77,23 @@ compressed data, so the library should never crash even in case of
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corrupted input.
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Lzlib implements a simplified version of the LZMA (Lempel-Ziv-Markov
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chain-Algorithm) algorithm. The original LZMA algorithm was designed by
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Igor Pavlov. For a description of the LZMA algorithm, see the Lzip
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manual.
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chain-Algorithm) algorithm. The high compression of LZMA comes from
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combining two basic, well-proven compression ideas: sliding dictionaries
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(LZ77/78) and markov models (the thing used by every compression
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algorithm that uses a range encoder or similar order-0 entropy coder as
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its last stage) with segregation of contexts according to what the bits
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are used for.
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The ideas embodied in lzlib are due to (at least) the following
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people: Abraham Lempel and Jacob Ziv (for the LZ algorithm), Andrey
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Markov (for the definition of Markov chains), G.N.N. Martin (for the
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definition of range encoding), Igor Pavlov (for putting all the above
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together in LZMA), and Julian Seward (for bzip2's CLI).
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File: lzlib.info, Node: Library Version, Next: Buffering, Prev: Introduction, Up: Top
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File: lzlib.info, Node: Library version, Next: Buffering, Prev: Introduction, Up: Top
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2 Library Version
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2 Library version
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*****************
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-- Function: const char * LZ_version ( void )
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@ -98,7 +111,7 @@ application.
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error( "bad library version" );
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File: lzlib.info, Node: Buffering, Next: Parameter Limits, Prev: Library Version, Up: Top
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File: lzlib.info, Node: Buffering, Next: Parameter limits, Prev: Library version, Up: Top
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3 Buffering
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***********
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@ -126,9 +139,9 @@ minimum sizes:
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member currently being decompressed or 64KiB, whichever is larger.
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File: lzlib.info, Node: Parameter Limits, Next: Compression Functions, Prev: Buffering, Up: Top
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File: lzlib.info, Node: Parameter limits, Next: Compression functions, Prev: Buffering, Up: Top
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4 Parameter Limits
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4 Parameter limits
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******************
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These functions provide minimum and maximum values for some parameters.
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@ -155,9 +168,9 @@ Current values are shown in square brackets.
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Returns the largest valid match length limit [273].
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File: lzlib.info, Node: Compression Functions, Next: Decompression Functions, Prev: Parameter Limits, Up: Top
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File: lzlib.info, Node: Compression functions, Next: Decompression functions, Prev: Parameter limits, Up: Top
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5 Compression Functions
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5 Compression functions
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***********************
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These are the functions used to compress data. In case of error, all of
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@ -254,7 +267,7 @@ calling `LZ_compress_errno' before using it.
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-- Function: enum LZ_Errno LZ_compress_errno ( struct LZ_Encoder *
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const ENCODER )
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Returns the current error code for ENCODER (*note Error Codes::).
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Returns the current error code for ENCODER (*note Error codes::).
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-- Function: int LZ_compress_finished ( struct LZ_Encoder * const
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ENCODER )
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perhaps not yet read.
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File: lzlib.info, Node: Decompression Functions, Next: Error Codes, Prev: Compression Functions, Up: Top
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File: lzlib.info, Node: Decompression functions, Next: Error codes, Prev: Compression functions, Up: Top
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6 Decompression Functions
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6 Decompression functions
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*************************
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These are the functions used to decompress data. In case of error, all
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-- Function: enum LZ_Errno LZ_decompress_errno ( struct LZ_Decoder *
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const DECODER )
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Returns the current error code for DECODER (*note Error Codes::).
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Returns the current error code for DECODER (*note Error codes::).
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-- Function: int LZ_decompress_finished ( struct LZ_Decoder * const
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DECODER )
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but perhaps not yet read.
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File: lzlib.info, Node: Error Codes, Next: Error Messages, Prev: Decompression Functions, Up: Top
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File: lzlib.info, Node: Error codes, Next: Error messages, Prev: Decompression functions, Up: Top
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7 Error Codes
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7 Error codes
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*************
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Most library functions return -1 to indicate that they have failed. But
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Problems::).
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File: lzlib.info, Node: Error Messages, Next: Data Format, Prev: Error Codes, Up: Top
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File: lzlib.info, Node: Error messages, Next: Data format, Prev: Error codes, Up: Top
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8 Error Messages
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8 Error messages
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****************
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-- Function: const char * LZ_strerror ( const enum LZ_Errno LZ_ERRNO )
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`LZ_(de)compress_errno'.
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File: lzlib.info, Node: Data Format, Next: Examples, Prev: Error Messages, Up: Top
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File: lzlib.info, Node: Data format, Next: Examples, Prev: Error messages, Up: Top
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9 Data Format
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9 Data format
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*************
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Perfection is reached, not when there is no longer anything to add, but
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The lzma stream, finished by an end of stream marker. Uses default
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values for encoder properties. See the lzip manual for a full
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description.
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Lzip only uses the LZMA marker `2' ("End Of Stream" marker). Lzlib
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also uses the LZMA marker `3' ("Sync Flush" marker).
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`CRC32 (4 bytes)'
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CRC of the uncompressed original data.
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File: lzlib.info, Node: Examples, Next: Problems, Prev: Data Format, Up: Top
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File: lzlib.info, Node: Examples, Next: Problems, Prev: Data format, Up: Top
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10 A small tutorial with examples
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*********************************
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7) LZ_decompress_close
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File: lzlib.info, Node: Problems, Next: Concept Index, Prev: Examples, Up: Top
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File: lzlib.info, Node: Problems, Next: Concept index, Prev: Examples, Up: Top
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11 Reporting Bugs
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*****************
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`lzlib.h'.
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File: lzlib.info, Node: Concept Index, Prev: Problems, Up: Top
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File: lzlib.info, Node: Concept index, Prev: Problems, Up: Top
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Concept Index
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Concept index
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*************
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