Class CompressArithmetic

java.lang.Object
  |
  +--CompressArithmetic

public class CompressArithmetic

extends java.lang.Object

CompressArithmetic.java

Mark Nelson
March 8, 1996
http://web2.airmail.net/markn
**** moded by David Scott in May of 2001 to make bijective
Ported to Java by Tim Tyler, July 2001 - http://mandala.co.uk/biac/

DESCRIPTION
-----------

This program performs an order-0 adaptive arithmetic encoding
function on an input file/stream, and sends the result to an
output file or stream.

This program contains the source code from the 1987 CACM article by Witten, Neal, and Cleary. I have taken the source modules and combined them into this single file for ease of distribution and compilation. Other than that, the code is essentially unchanged.

This program takes two arguments: an input file and an output file. You can leave off one argument and send your output to stdout. Leave off two arguments and read your input from stdin as well.

This program accompanies my article "Data Compression with the Burrows-Wheeler Transform."

Build Instructions
------------------

Define the constant unix for UNIX or UNIX-like systems. The use of this constant turns off the code used to force the MS-DOS file system into binary mode. g++ already does this, and your UNIX C++ compiler might also.

Borland C++ 4.5 16 bit : bcc -w ari.cpp
Borland C++ 4.5 32 bit : bcc32 -w ari.cpp
Microsoft Visual C++ 1.52 : cl /W4 ari.cpp
Microsoft Visual C++ 2.1 : cl /W4 ari.cpp
g++ : g++ -o ari ari.cpp

Typical Use
-----------

rle < raw-file | bwt | mtf | rle | ari > compressed-file

Constructor Summary

CompressArithmetic()

Method Summary

void	compress(java.lang.String input_file, java.lang.String output_file) Compresses input_file and store the results in output_file
static void	main(java.lang.String[] args) Handles the Commmand-line interface to the compressor

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CompressArithmetic

public CompressArithmetic()

Method Detail

compress

public void compress(java.lang.String input_file,
                     java.lang.String output_file)
              throws java.io.IOException

Compresses input_file and store the results in output_file

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Handles the Commmand-line interface to the compressor