xref: /plan9/sys/src/cmd/unix/drawterm/libc/fmtrune.c (revision 0d601874851962e88c6c60fdd2e637bba04e13c2)
1 /*
2  * The authors of this software are Rob Pike and Ken Thompson.
3  *              Copyright (c) 2002 by Lucent Technologies.
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose without fee is hereby granted, provided that this entire notice
6  * is included in all copies of any software which is or includes a copy
7  * or modification of this software and in all copies of the supporting
8  * documentation for such software.
9  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
10  * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE
11  * ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
12  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
13  */
14 #include <u.h>
15 #include <libc.h>
16 #include "fmtdef.h"
17 
18 int
19 fmtrune(Fmt *f, int r)
20 {
21 	Rune *rt;
22 	char *t;
23 	int n;
24 
25 	if(f->runes){
26 		rt = (Rune*)f->to;
27 		FMTRCHAR(f, rt, f->stop, r);
28 		f->to = rt;
29 		n = 1;
30 	}else{
31 		t = (char*)f->to;
32 		FMTRUNE(f, t, f->stop, r);
33 		n = t - (char*)f->to;
34 		f->to = t;
35 	}
36 	f->nfmt += n;
37 	return 0;
38 }
39