ref: 71f807873b43a4d2a2e2c9d1acbe1d97b5fdf18c
dir: /sys/src/libc/port/runestrecpy.c/
#include <u.h>
#include <libc.h>
Rune*
runestrecpy(Rune *s1, Rune *es1, Rune *s2)
{
if(s1 >= es1)
return s1;
while(*s1++ = *s2++){
if(s1 == es1){
s1[-1] = '\0';
break;
}
}
return s1-1;
}