rem: char const *base = name + FILESYSTEM_PREFIX_LEN (name);
add: char const *base = name + FILE_SYSTEM_PREFIX_LEN (name);
context: base_name (char const *name){  char const *base = name + FILESYSTEM_PREFIX_LEN (name);  char const *p;  for (p = base; *p; p++)    {      if (ISSLASH (*p))	{	  /* Treat multiple adjacent slashes like a single slash.  */	  do p++;	  while (ISSLASH (*p));	  /* If the file name ends in slash, use the trailing slash as	     the basename if no non-slashes have been found.  */	  if (! *p)	    {	      if (ISSLASH (*base))		base = p - 1;	      break;	    }	  /* *P is a non-slash preceded by a slash.  */	  base = p;	}    }  return (char *) base;}