Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>

int
utfnlen(char *s, long m)
{
        int c;
        long n;
        Rune rune;
        char *es;

        es = s + m;
        for(n = 0; s < es; n++) {
                c = *(uchar*)s;
                if(c < Runeself){
                        if(c == '\0')
                                break;
                        s++;
                        continue;
                }
                if(!fullrune(s, es-s))
                        break;
                s += chartorune(&rune, s);
        }
        return n;
}