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/* Copyright (C) 2006 MySQL AB & Ramil Kalimullin
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 "maria_def.h"
#ifdef HAVE_RTREE_KEYS
#include "ma_rt_index.h"
#include "ma_rt_key.h"
#include "ma_rt_mbr.h"
/*
Add key to the page
RESULT VALUES
-1 Error
0 Not split
1 Split
*/
int maria_rtree_add_key(MARIA_HA *info, MARIA_KEYDEF *keyinfo, uchar *key,
uint key_length, uchar *page_buf, my_off_t *new_page)
{
uint page_size= _ma_get_page_used(info, page_buf);
uint nod_flag= _ma_test_if_nod(info, page_buf);
DBUG_ENTER("maria_rtree_add_key");
if (page_size + key_length + info->s->base.rec_reflength <=
keyinfo->block_length)
{
/* split won't be necessary */
if (nod_flag)
{
/* save key */
DBUG_ASSERT(_ma_kpos(nod_flag, key) < info->state->key_file_length);
memcpy(rt_PAGE_END(info, page_buf), key - nod_flag,
key_length + nod_flag);
page_size+= key_length + nod_flag;
}
else
{
/* save key */
DBUG_ASSERT(_ma_dpos(info, nod_flag, key + key_length +
info->s->base.rec_reflength) <
info->state->data_file_length +
info->s->base.pack_reclength);
memcpy(rt_PAGE_END(info, page_buf), key, key_length +
info->s->base.rec_reflength);
page_size+= key_length + info->s->base.rec_reflength;
}
_ma_store_page_used(info, page_buf, page_size, nod_flag);
DBUG_RETURN(0);
}
DBUG_RETURN(maria_rtree_split_page(info, keyinfo, page_buf, key, key_length,
new_page) ? -1 : 1);
}
/*
Delete key from the page
*/
int maria_rtree_delete_key(MARIA_HA *info, uchar *page_buf, uchar *key,
uint key_length, uint nod_flag)
{
uint16 page_size= _ma_get_page_used(info, page_buf);
uchar *key_start;
key_start= key - nod_flag;
if (!nod_flag)
key_length+= info->s->base.rec_reflength;
memmove(key_start, key + key_length, page_size - key_length -
(key - page_buf));
page_size-= key_length + nod_flag;
_ma_store_page_used(info, page_buf, page_size, nod_flag);
return 0;
}
/*
Calculate and store key MBR
*/
int maria_rtree_set_key_mbr(MARIA_HA *info, MARIA_KEYDEF *keyinfo, uchar *key,
uint key_length, my_off_t child_page)
{
DBUG_ENTER("maria_rtree_set_key_mbr");
if (!_ma_fetch_keypage(info, keyinfo, child_page,
PAGECACHE_LOCK_LEFT_UNLOCKED,
DFLT_INIT_HITS, info->buff, 0, 0))
DBUG_RETURN(-1);
DBUG_RETURN(maria_rtree_page_mbr(info, keyinfo->seg,
info->buff, key, key_length));
}
#endif /*HAVE_RTREE_KEYS*/
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