From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Thu, 30 Jun 2011 09:14:10 -0400
To: 9fans@9fans.net
Message-ID: <07ca4941227790da33d892ee4679c023@ladd.quanstro.net>
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Subject: Re: [9fans] [RFC] fonts and unicode/utf [TeX]
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> But, as the present state allows the use for every character set that
> fits in eight bits, by using (for Plan9 users) tcs(1) to feed TeX with
> what it expects, I will not delay forever the release of 1.0 waiting for
> this next solution.

good grief.  how hard is it to write this code!?  this bit depends on just a
few simple functions from the plan 9 c library and that can be easily
appropriated, namely chartorune and fullrune, and a user-defined getc.
(not compiled, just dashed off.  just an example of how easy this is.)

char
texgetutfchar(void)
{
	char ibuf[UTFmax + 1];
	int c, utfi;
	Rune r;

	for(;;){
		if(utfi == sizeof ibuf - 1){
			itfi = 0;
			print("garbage input rejected\n");
		}
		ibuf[utfi++] = getc();
		ibuf[utfi] = 0;
		if(fullrune(ibuf, utfi)){
			r = chartorune(&r, ibuf);
			utfi = 0;
			if(r >= 256){
				print("codepoint %#.6ux rejected", r);
				continue;
			}
			return (char)r;
		}
	}
}

- erik