From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Mon, 24 Jun 2013 16:59:07 -0400
To: 9fans@9fans.net
Message-ID: <29ac93811382ec8ac9e116ef6b36969f@ladd.quanstro.net>
In-Reply-To: <20130624212514.RPF/QfniRbVCEYsL8rYhpXyb@dietcurd.local>
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	<20130624212514.RPF/QfniRbVCEYsL8rYhpXyb@dietcurd.local>
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Subject: Re: [9fans] Character case mappings
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On Mon Jun 24 16:26:37 EDT 2013, sdaoden@gmail.com wrote:
> erik quanstrom <quanstro@quanstro.net> wrote:
>  |all the other rune tables work this way.  there is one
>  |table per property.  having a structure doesn't fit the
>  |current programming interface, nor usage.
>
> uuh, ok, 9atom seems to have seen a lot of progress compared to
> what i have yet looked at.

just a few tables.  and a bit of time spent applying them.  ;-)
if you have plan 9 installed and can

	nflag=-n srv $nflag -q tcp!atom.9atom.org atom &&
		mount $nflag /srv/atom /n/atom atom

then the tables, &c. are in /n/atom/plan9/sys/src/libc/port.
the awk code to generate them, and the supporting functions
are in /n/atom/plan9/sys/src/cmd/runetype.

a particularlly nifty (if straightforward) application is grep -I, which is like
grep -i, but translates its input with tolowerrune(tobaserune(r))
rather than tolower(c).  also straightforward is rune/case, which is
like tr 'A-Z' 'a-z', except generalized for unicode.

see also,
http://www.9atom.org/magic/man2html/1/rune
http://www.9atom.org/magic/man2html/2/isalpharune
http://www.9atom.org/magic/man2html/2/runeclass

- erik