Initial release.
USAGE: big_grep [args] -p <patternfile> -i <inputfile>
DESCRIPTION:
Matches every pattern of <patternfile> against every line in <inputfile>.
This is useful for large numbers of patterns, which exceed the normal 'GNU grep'
input limits. Inclusive (default) or exclusive matching modes are possible.
ARGUMENTS:
-i [filename]: target input file
-p [filename]: file with patterns to match
-o [filename]: output file (optional)
-v: <flag> inverse mode, i.e. exclude matches (optional)
-r: <string> perl-style regex which is used to extract a substring from <inputfile>,
which is then searched for in <patternfile> (optional)
-t: <flag> test regex on first line of <inputfile> and exit
-h: <flag> print help and exit
-V: <flag> print program version
COPYRIGHT:
Copyright 2021 Benjamin Leutner
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.