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/* Copyright (C) 2000-2001 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 */
/* Read through all rows sequntially */
#include "myisamdef.h"
int mi_scan_init(register MI_INFO *info)
{
DBUG_ENTER("mi_scan_init");
info->nextpos=info->s->pack.header_length; /* Read first record */
info->lastinx= -1; /* Can't forward or backward */
if (info->opt_flag & WRITE_CACHE_USED && flush_io_cache(&info->rec_cache))
DBUG_RETURN(my_errno);
DBUG_RETURN(0);
}
/*
Read a row based on position.
If filepos= HA_OFFSET_ERROR then read next row
Return values
Returns one of following values:
0 = Ok.
HA_ERR_END_OF_FILE = EOF.
*/
int mi_scan(MI_INFO *info, uchar *buf)
{
DBUG_ENTER("mi_scan");
/* Init all but update-flag */
info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
DBUG_RETURN ((*info->s->read_rnd)(info,buf,info->nextpos,1));
}
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