SQ
Section: User Commands (1)
Updated: LOCAL
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NAME
sq - squeeze a sorted word list
unsq - unsqueeze a sorted word list
SYNOPSIS
sq
< infile > outfile
unsq
< infile > outfile
DESCRIPTION
sq
compresses a sorted list of words (a dictionary).
For example:
-
sort /usr/dict/words | sq | compress > words.sq.Z
will compress dict by about a factor of 4.
unsq
uncompress the output of
sq.
For example:
-
compress -d < words.sq.Z | unsq | sort -f -o words
will uncompress a dictionary compressed with
sq.
The squeezing is achieved by eliminating common prefixes, and replacing
them with a single character which encodes the number of characters
shared with the preceding word.
The prefix size is encoded as a single printable character:
0-9 represent 0-9, A-Z represent 10-35, and a-z represent 36-61.
AUTHOR
Mike Wexler
SEE ALSO
compress(1), sort(1).
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- AUTHOR
-
- SEE ALSO
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Time: 12:52:44 GMT, February 12, 2023