text: /*	@(#)strlen.c	1.3	*/
  /*	3.0 SID #	1.2	*/
  /*LINTLIBRARY*/
  /*
   * Returns the number of
   * non-NULL bytes in string argument.
   */
  
  int
  strlen(s)
  register char *s;
  {
  	register char *s0 = s + 1;
  
  	while (*s++ != '\0')
  		;
  	return (s - s0);
  }
  