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#include <u.h>#include <libc.h>#include "String.h" String*s_reset(String *s){	if(s != nil){		s = s_unique(s);		s->ptr = s->base;		*s->ptr = '\0';	} else		s = s_new();	return s;} String*s_restart(String *s){	s = s_unique(s);	s->ptr = s->base;	return s;}