#include <u.h>
#include <libc.h>
Rune*
runestrncpy(Rune *s1, Rune *s2, long n)
{
int i;
Rune *os1;
os1 = s1;
for(i = 0; i < n; i++)
if((*s1++ = *s2++) == 0) {
while(++i < n)
*s1++ = 0;
return os1;
}