From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <fc7d8c1bc0687a5996c00867bfbda23b@plan9.jp>
To: 9fans@cse.psu.edu
From: Joel Salomon <JoelCSalomon@Gmail.com>
Date: Sun,  4 Feb 2007 21:41:40 -0500
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Subject: [9fans] s_putc and Runes
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I=E2=80=99ve been appending single Runes to Strings, so I checked
/n/sources/plan9/sys/src/libString/s_putc.c to see if it handled
Runes.  Is there a reason it doesn=E2=80=99t, or that s_putrune doesn=E2=80=
=99t exist?

Here=E2=80=99s my implementation, using none of String internals:

void
s_putrune(String *s, Rune r)
{
	char rbuf[UTFmax];
	s_nappend(s, rbuf, runetochar(rbuf, &r));
}

or as part of the library (where I=E2=80=99m a bit shakier on the semanti=
cs):

void
s_putrune(String *s, Rune r)
{
	char rbuf[UTFmax];
	int n;
	if(s->ref > 1)
		sysfatal("can't s_putc a shared string");
	if (s->ptr >=3D s->end - n=3Drunelen(r))
		s_grow(s, n+1);
	(s->ptr) +=3D runetochar(s->ptr, &r);
}

--Joel