1/* Copyright (c) 2000, 2001, 2005-2007 MySQL AB
2 Use is subject to license terms
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; version 2 of the License.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
16
17/* read record through position and fix key-position */
18/* As mi_rsame but supply a position */
19
20#include "myisamdef.h"
21
22
23 /*
24 ** If inx >= 0 update index pointer
25 ** Returns one of the following values:
26 ** 0 = Ok.
27 ** HA_ERR_KEY_NOT_FOUND = Row is deleted
28 ** HA_ERR_END_OF_FILE = End of file
29 */
30
31int mi_rsame_with_pos(MI_INFO *info, uchar *record, int inx, my_off_t filepos)
32{
33 DBUG_ENTER("mi_rsame_with_pos");
34 DBUG_PRINT("enter",("index: %d filepos: %ld", inx, (long) filepos));
35
36 if (inx < -1 ||
37 (inx >= 0 && ! mi_is_key_active(info->s->state.key_map, inx)))
38 {
39 DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
40 }
41
42 info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
43 if ((*info->s->read_rnd)(info,record,filepos,0))
44 {
45 if (my_errno == HA_ERR_RECORD_DELETED)
46 my_errno=HA_ERR_KEY_NOT_FOUND;
47 DBUG_RETURN(my_errno);
48 }
49 info->lastpos=filepos;
50 info->lastinx=inx;
51 if (inx >= 0)
52 {
53 info->lastkey_length=_mi_make_key(info,(uint) inx,info->lastkey,record,
54 info->lastpos);
55 info->update|=HA_STATE_KEY_CHANGED; /* Don't use indexposition */
56 }
57 DBUG_RETURN(0);
58} /* mi_rsame_pos */
59