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/* Copyright (C) 2000-2004, 2006 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 */
#include "heapdef.h"
int heap_rkey(HP_INFO *info, uchar *record, int inx, const uchar *key,
key_part_map keypart_map, enum ha_rkey_function find_flag)
{
uchar *pos;
HP_SHARE *share= info->s;
HP_KEYDEF *keyinfo= share->keydef + inx;
DBUG_ENTER("heap_rkey");
DBUG_PRINT("enter",("info: 0x%lx inx: %d", (long) info, inx));
if ((uint) inx >= share->keys)
{
DBUG_RETURN(my_errno= HA_ERR_WRONG_INDEX);
}
info->lastinx= inx;
info->current_record= (ulong) ~0L; /* For heap_rrnd() */
if (keyinfo->algorithm == HA_KEY_ALG_BTREE)
{
heap_rb_param custom_arg;
custom_arg.keyseg= info->s->keydef[inx].seg;
custom_arg.key_length= info->lastkey_len=
hp_rb_pack_key(keyinfo, (uchar*) info->lastkey,
(uchar*) key, keypart_map);
custom_arg.search_flag= SEARCH_FIND | SEARCH_SAME;
/* for next rkey() after deletion */
if (find_flag == HA_READ_AFTER_KEY)
info->last_find_flag= HA_READ_KEY_OR_NEXT;
else if (find_flag == HA_READ_BEFORE_KEY)
info->last_find_flag= HA_READ_KEY_OR_PREV;
else
info->last_find_flag= find_flag;
if (!(pos= tree_search_key(&keyinfo->rb_tree, info->lastkey, info->parents,
&info->last_pos, find_flag, &custom_arg)))
{
info->update= 0;
DBUG_RETURN(my_errno= HA_ERR_KEY_NOT_FOUND);
}
memcpy(&pos, pos + (*keyinfo->get_key_length)(keyinfo, pos), sizeof(uchar*));
info->current_ptr= pos;
}
else
{
if (!(pos= hp_search(info, share->keydef + inx, key, 0)))
{
info->update= 0;
DBUG_RETURN(my_errno);
}
if (!(keyinfo->flag & HA_NOSAME) || (keyinfo->flag & HA_END_SPACE_KEY))
memcpy(info->lastkey, key, (size_t) keyinfo->length);
}
memcpy(record, pos, (size_t) share->reclength);
info->update= HA_STATE_AKTIV;
DBUG_RETURN(0);
}
/* Quick find of record */
uchar* heap_find(HP_INFO *info, int inx, const uchar *key)
{
return hp_search(info, info->s->keydef + inx, key, 0);
}
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