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 }