1 #include <u.h>
2 #include <libc.h>
3 #include "libString.h"
4 
5 String*
6 s_unique(String *s)
7 {
8 	String *p;
9 
10 	if(s->ref > 1){
11 		p = s;
12 		s = s_clone(p);
13 		s_free(p);
14 	}
15 	return s;
16 }