#include <u.h>#include <libc.h>#include "String.h" /* append a char array ( of up to n characters) to a String */String *s_nappend(String *to, char *from, int n){	if (to == 0)		to = s_new();	if (from == 0)		return to;	for(; n && *from; from++, n--)		s_putc(to, *from);	s_terminate(to);	return to;}