Function fl_log_iterator_buffer_init

sql/handler.cc:369–426

@brief returns buffer, to be assigned in handler_iterator struct */

  returns buffer, to be assigned in handler_iterator struct
*/
enum handler_create_iterator_result
fl_log_iterator_buffer_init(struct handler_iterator *iterator)
{
  MY_DIR *dirp;
  struct fl_buff *buff;
  char *name_ptr;
  uchar *ptr;
  FILEINFO *file;
  uint32 i;

  /* to be able to make my_free without crash in case of error */
  iterator->buffer= 0;

  if (!(dirp = my_dir(fl_dir, MYF(0))))
  {
    return HA_ITERATOR_ERROR;
  }
  if ((ptr= (uchar*)my_malloc(ALIGN_SIZE(sizeof(fl_buff)) +
                             ((ALIGN_SIZE(sizeof(LEX_STRING)) +
                               sizeof(enum log_status) +
                               + FN_REFLEN + 1) *
                              (uint) dirp->number_off_files),
                             MYF(0))) == 0)
  {
    return HA_ITERATOR_ERROR;
  }
  buff= (struct fl_buff *)ptr;
  buff->entries= buff->current= 0;
  ptr= ptr + (ALIGN_SIZE(sizeof(fl_buff)));
  buff->names= (LEX_STRING*) (ptr);
  ptr= ptr + ((ALIGN_SIZE(sizeof(LEX_STRING)) *
               (uint) dirp->number_off_files));
  buff->statuses= (enum log_status *)(ptr);
  name_ptr= (char *)(ptr + (sizeof(enum log_status) *
                            (uint) dirp->number_off_files));
  for (i=0 ; i < (uint) dirp->number_off_files  ; i++)
  {
    enum log_status st;
    file= dirp->dir_entry + i;
    if ((file->name[0] == '.' &&
         ((file->name[1] == '.' && file->name[2] == '\0') ||
            file->name[1] == '\0')))
      continue;
    if ((st= fl_get_log_status(file->name)) == HA_LOG_STATUS_NOSUCHLOG)
      continue;
    name_ptr= strxnmov(buff->names[buff->entries].str= name_ptr,
                       FN_REFLEN, fl_dir, file->name, NullS);
    buff->names[buff->entries].length= (name_ptr -
                                        buff->names[buff->entries].str);
    buff->statuses[buff->entries]= st;
    buff->entries++;
  }

  iterator->buffer= buff;
  iterator->next= &fl_log_iterator_next;
  iterator->destroy= &fl_log_iterator_destroy;
  return HA_ITERATOR_OK;
}