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SQ.DOC
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1986-02-01
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61 lines
SQ version 1.5a is an experimental outgrowth of Richard
Greenlaw's file compression utility. Note that it was
developed by modifying SQ 1.5, not 1.6 which has been in
the public domain for a year or so.
1.5a changes:
a) Directed I/O support was removed.
b) Leor Zolman's WILDEXP command-line interface was
added. All file and output drive specifications
are taken from the command line.
c) Output file sizes are checked against input file
sizes. If SQ finds a file which doesn't compress
very well then it discards the output file, and,
if the output was on a different disk from the
input file then the input file is simply copied
to the destination disk.
d) A command-line option consisting of a single plus
sign (+) causes SQ to ask whether or not to
discard a poorly-compressed file.
e) Files of 8 sectors or less are never squeezed.
Even on single-density standard CP/M interchange
disks no space saving would be realised and, when
transferring such files by modem the saving in
transmission time is not significant.
Examples:
1 A>sq *.c *.asm
squeezes all .C and .ASM files on the logged-in
disk.
2 A>sq b: *.c *.asm
same as above except that the squeezed files are
written to the B: disk.
3 A>sq b: *.c + *.asm
same again except that if a .ASM file is found not
to compress well then SQ will ask whether or not to
discard the output file and copy the original.
4 A>sq b: *.* !*.com
squeeze all except .COM files and write the output
files to the B: disk.
Note that this IS a pre-release version of SQ. PLEASE USE
IT AND REPORT ANY BUGS OR SUBMIT ANY SUGGESTIONS via this
system or to
John Hastwell-Batten,
38 Silvia St, Hornsby, NSQ 2077
(02)477 4225 ah, (02) 239 9327 bh.