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/* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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)
{
info->lastinx= -1;
info->current_record= (ulong) ~0L; /* No current record */
info->update=0;
info->next_block=0;
return(0);
}
int heap_scan(register HP_INFO *info, uchar *record)
{
HP_SHARE *share=info->s;
ulong pos;
pos= ++info->current_record;
if (pos < info->next_block)
{
info->current_ptr+=share->recordspace.block.recbuffer;
}
else
{
info->next_block+=share->recordspace.block.records_in_block;
if (info->next_block >= share->recordspace.chunk_count)
{
info->next_block= share->recordspace.chunk_count;
if (pos >= info->next_block)
{
info->update= 0;
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)
{
info->update= HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND;
return(my_errno=HA_ERR_RECORD_DELETED);
}
info->update= HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND | HA_STATE_AKTIV;
hp_extract_record(share, record, info->current_ptr);
info->current_hash_ptr=0; /* Can't use read_next */
return(0);
} /* heap_scan */
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