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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "heap_priv.h"
#include <string.h>
#include <drizzled/error_t.h>
using namespace drizzled;
/* Read prev record for key */
int heap_rprev(HP_INFO *info, unsigned char *record)
{
unsigned char *pos;
HP_SHARE *share=info->getShare();
if (info->lastinx < 0)
return(errno=HA_ERR_WRONG_INDEX);
{
if (info->current_ptr || (info->update & HA_STATE_NEXT_FOUND))
{
if ((info->update & HA_STATE_DELETED))
pos= hp_search(info, share->keydef + info->lastinx, &info->lastkey[0], 3);
else
pos= hp_search(info, share->keydef + info->lastinx, &info->lastkey[0], 2);
}
else
{
pos=0; /* Read next after last */
errno=HA_ERR_KEY_NOT_FOUND;
}
}
if (!pos)
{
info->update=HA_STATE_PREV_FOUND; /* For heap_rprev */
if (errno == HA_ERR_KEY_NOT_FOUND)
errno=HA_ERR_END_OF_FILE;
return(errno);
}
hp_extract_record(share, record, pos);
info->update=HA_STATE_AKTIV | HA_STATE_PREV_FOUND;
return(0);
}
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