unsq1
Squeeze or unsqueeze a sorted word list
Part of sq(1).
Usage
sq <
infile
>
outfile
unsq <
infile
>
outfile
Overview
sq compresses a sorted list of words (a dictionary). For example:
sort -u /usr/share/dict/words | sq | gzip -9 > words.sq.gz
will compress dict by about a factor of 5.
unsq uncompress the output of sq. For example:
gunzip < words.sq.gz | 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.
Releases
15 releases since Debian 1.1 (Buzz); the text changed 3 times.