TH SQ 1 Local
SH NAME
sq, usq \- squeeze (compress) files
SH SYNOPSYS
B sq
[
I file1
] [
I file2
] ...
br
B usq
[
I \-count
]
[
I \-fcount
]
[
I file1
] [
I file2
] ...
SH DESCRIPTION
I sq
compresses one or more files, using a Huffman coding scheme.
I usq
decompresses or displays one or more files squeezed by
I sq.
The algorithm is identical to the one used by the
popular public domain 'SQ' programs, originally authored by Richard
Greenlaw.
PP
sq will squeeze each file passed on the argument line.  It will
append `.SQ' to the original file name to create the output file
name.  If no file names are given, sq will prompt for file names
from the standard input.  A message is printed for each file,
tracing each pass of the compression process.
PP
I usq
will unsqueeze or display the files requested on the command
line.  If no files are requested,  the file names are input from
the standard input.  If no option is given, the file is unsqueezed
to its original name.
PP
If the \-count option is used, count lines are displayed
from the start of the file, with all unprintable characters
except CR, LF, TAB, and FF converted to periods.  The output is
sent to the standard output.  If the \-fcount option is used,
the file is displayed with a formfeed appended to the preview
of each file.
SH AUTHOR
Richard Greenlaw (original), Theo Pozzy (ported versions)
SH BUGS
The file naming convention is not a one-to-one mapping, so multiple
files may be squeezed to the same output file name.
Also, the output file name for usq cannot be overridden.
SH "SEE ALSO"
compact(1)


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