Date: Sun, 24 Jun 2007 11:21:12 -0500 (CDT) From: "Sean C. Farley" <sean-freebsd@farley.org> To: Gabor Kovesdan <gabor@freebsd.org> Cc: freebsd-current@freebsd.org, Steven Kreuzer <skreuzer@exit2shell.com> Subject: Re: Port of OpenBSD's sdiff Message-ID: <20070624105011.R44958@thor.farley.org> In-Reply-To: <467C45C7.6020401@FreeBSD.org> References: <20070622210119.GA4186@clamps.exit2shell.com> <467C45C7.6020401@FreeBSD.org>
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On Fri, 22 Jun 2007, Gabor Kovesdan wrote:
> Hello Steven,
>
> these are very good news! You might also want to take a look at
> textproc/bsddiff, textproc/bsdgrep and textproc/bsdsort. These are the
> BSD-licensed text processing tools from OpenBSD,
<snip>
I have been looking at freegrep (original source of OpenBSD's grep) off
and on for years. Here[1] is where I proposed it for FreeBSD awhile
ago. This is the patch[2] (part of OpenBSD's grep) I wrote for speeding
up non-regex related searches.
I am interested in fixing it up to be worthy for inclusion. Here are a
few important issues with it:
1. Not multi-byte tested that I know.
2. Uses mmap() instead of read() for scanning a file. This makes it a
bit slower than GNU's grep. OTOH, it makes the code much simpler.
3. fgrep examines each expression in turn. It should use something like
a tree to consolidate the expressions if possible.
Sean
1. http://lists.freebsd.org/pipermail/freebsd-hackers/2003-June/001612.html
2. http://www.farley.org/?page=software#freegrep
--
sean-freebsd@farley.org
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