1*40ef9009SDavid du Colombier /*
2*40ef9009SDavid du Colombier * The authors of this software are Rob Pike and Ken Thompson.
3*40ef9009SDavid du Colombier * Copyright (c) 2002 by Lucent Technologies.
4*40ef9009SDavid du Colombier * Permission to use, copy, modify, and distribute this software for any
5*40ef9009SDavid du Colombier * purpose without fee is hereby granted, provided that this entire notice
6*40ef9009SDavid du Colombier * is included in all copies of any software which is or includes a copy
7*40ef9009SDavid du Colombier * or modification of this software and in all copies of the supporting
8*40ef9009SDavid du Colombier * documentation for such software.
9*40ef9009SDavid du Colombier * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
10*40ef9009SDavid du Colombier * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
11*40ef9009SDavid du Colombier * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
12*40ef9009SDavid du Colombier * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
13*40ef9009SDavid du Colombier */
14*40ef9009SDavid du Colombier #include <stdarg.h>
15*40ef9009SDavid du Colombier #include <string.h>
16*40ef9009SDavid du Colombier #include "utf.h"
17*40ef9009SDavid du Colombier #include "utfdef.h"
18*40ef9009SDavid du Colombier
19*40ef9009SDavid du Colombier int
utfnlen(char * s,long m)20*40ef9009SDavid du Colombier utfnlen(char *s, long m)
21*40ef9009SDavid du Colombier {
22*40ef9009SDavid du Colombier int c;
23*40ef9009SDavid du Colombier long n;
24*40ef9009SDavid du Colombier Rune rune;
25*40ef9009SDavid du Colombier char *es;
26*40ef9009SDavid du Colombier
27*40ef9009SDavid du Colombier es = s + m;
28*40ef9009SDavid du Colombier for(n = 0; s < es; n++) {
29*40ef9009SDavid du Colombier c = *(uchar*)s;
30*40ef9009SDavid du Colombier if(c < Runeself){
31*40ef9009SDavid du Colombier if(c == '\0')
32*40ef9009SDavid du Colombier break;
33*40ef9009SDavid du Colombier s++;
34*40ef9009SDavid du Colombier continue;
35*40ef9009SDavid du Colombier }
36*40ef9009SDavid du Colombier if(!fullrune(s, es-s))
37*40ef9009SDavid du Colombier break;
38*40ef9009SDavid du Colombier s += chartorune(&rune, s);
39*40ef9009SDavid du Colombier }
40*40ef9009SDavid du Colombier return n;
41*40ef9009SDavid du Colombier }
42