/* Copyright (C) 2000-2002 MySQL AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA */

/* Scan through all rows */

#include "heapdef.h"

/*
	   Returns one of following values:
	   0 = Ok.
	   HA_ERR_RECORD_DELETED = Record is deleted.
	   HA_ERR_END_OF_FILE = EOF.
*/

int heap_scan_init(register HP_INFO *info)
{
  DBUG_ENTER("heap_scan_init");
  info->lastinx= -1;
  info->current_record= (ulong) ~0L;		/* No current record */
  info->update=0;
  DBUG_RETURN(0);
}

int heap_scan(register HP_INFO *info, uchar *record)
{
  HP_SHARE *share=info->s;
  ulong pos;
  DBUG_ENTER("heap_scan");

  pos= ++info->current_record;
  if (pos >= share->recordspace.chunk_count)
  {
    info->update= 0;
    DBUG_RETURN(my_errno= HA_ERR_END_OF_FILE);
  }

  hp_find_record(info, pos);

  if (get_chunk_status(&share->recordspace, info->current_ptr) !=
      CHUNK_STATUS_ACTIVE)
  {
    DBUG_PRINT("warning",("Found deleted record or secondary chunk"));
    info->update= HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND;
    DBUG_RETURN(my_errno=HA_ERR_RECORD_DELETED);
  }
  info->update= HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND | HA_STATE_AKTIV;
  if (hp_extract_record(info, record, info->current_ptr))
  {
    DBUG_RETURN(my_errno);
  }
  info->current_hash_ptr=0;			/* Can't use read_next */
  DBUG_RETURN(0);
} /* heap_scan */
