By
Claudio Scordino
Linda Martorini
Francesco Lelli
(2002)
HFFzip is a file compressor for Linux and FreeBSD based upon Huffman coding.
The Huffman algorithm uses a binary tree, and has complexity O(N*N) for compression and O(NlogN) for
decompression.
Although this file compressor is not so good as other compression programs (like gzip), HFFzip
is right for embedded systems, because of its little size and the simple algorithm used.
License
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
If you modify this software, please send me the modified code.
How to use
Before using this program you have to compile it: open a shell and just type
make
The syntax of the program is the following:
hffzip -c|-d [-i input_file][-o output_file]
The flags -c and -d specify if you want compress or decompress the file.
The flags -i and -o let you to operate on files: if these flags are not provided, the programs
works on standard input and standard output.