|
1
by brian
clean slate |
1 |
/* Copyright (C) 2000-2002 MySQL AB
|
2 |
||
3 |
This program is free software; you can redistribute it and/or modify
|
|
4 |
it under the terms of the GNU General Public License as published by
|
|
5 |
the Free Software Foundation; version 2 of the License.
|
|
6 |
||
7 |
This program is distributed in the hope that it will be useful,
|
|
8 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
9 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
10 |
GNU General Public License for more details.
|
|
11 |
||
12 |
You should have received a copy of the GNU General Public License
|
|
13 |
along with this program; if not, write to the Free Software
|
|
14 |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
15 |
||
|
1130.3.28
by Monty Taylor
Moved heapdef.h and myisamdef.h to *_priv.h for easier filtering for include guard check. |
16 |
#include "heap_priv.h" |
|
1
by brian
clean slate |
17 |
|
|
612.2.13
by Monty Taylor
Work on removing global.h from headers that should be installed. |
18 |
#include <string.h> |
19 |
||
|
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
20 |
using namespace drizzled; |
21 |
||
|
1
by brian
clean slate |
22 |
/* Read prev record for key */
|
23 |
||
24 |
||
|
481
by Brian Aker
Remove all of uchar. |
25 |
int heap_rprev(HP_INFO *info, unsigned char *record) |
|
1
by brian
clean slate |
26 |
{
|
|
481
by Brian Aker
Remove all of uchar. |
27 |
unsigned char *pos; |
|
1
by brian
clean slate |
28 |
HP_SHARE *share=info->s; |
29 |
HP_KEYDEF *keyinfo; |
|
30 |
||
31 |
if (info->lastinx < 0) |
|
|
1241.9.57
by Monty Taylor
Oy. Bigger change than I normally like - but this stuff is all intertwined. |
32 |
return(errno=HA_ERR_WRONG_INDEX); |
|
1
by brian
clean slate |
33 |
keyinfo = share->keydef + info->lastinx; |
34 |
if (keyinfo->algorithm == HA_KEY_ALG_BTREE) |
|
35 |
{
|
|
36 |
heap_rb_param custom_arg; |
|
37 |
||
38 |
if (info->last_pos) |
|
|
960.2.3
by Monty Taylor
Changed heap to c++. |
39 |
pos = (unsigned char *)tree_search_next(&keyinfo->rb_tree, |
40 |
&info->last_pos, |
|
41 |
offsetof(TREE_ELEMENT, right), |
|
42 |
offsetof(TREE_ELEMENT, left)); |
|
|
1
by brian
clean slate |
43 |
else
|
44 |
{
|
|
45 |
custom_arg.keyseg = keyinfo->seg; |
|
46 |
custom_arg.key_length = keyinfo->length; |
|
47 |
custom_arg.search_flag = SEARCH_SAME; |
|
|
960.2.3
by Monty Taylor
Changed heap to c++. |
48 |
pos = (unsigned char *)tree_search_key(&keyinfo->rb_tree, |
49 |
info->lastkey, info->parents, |
|
50 |
&info->last_pos, |
|
51 |
info->last_find_flag, |
|
52 |
&custom_arg); |
|
|
1
by brian
clean slate |
53 |
}
|
54 |
if (pos) |
|
55 |
{
|
|
56 |
memcpy(&pos, pos + (*keyinfo->get_key_length)(keyinfo, pos), |
|
|
481
by Brian Aker
Remove all of uchar. |
57 |
sizeof(unsigned char*)); |
|
1
by brian
clean slate |
58 |
info->current_ptr = pos; |
59 |
}
|
|
60 |
else
|
|
61 |
{
|
|
|
1241.9.57
by Monty Taylor
Oy. Bigger change than I normally like - but this stuff is all intertwined. |
62 |
errno = HA_ERR_KEY_NOT_FOUND; |
|
1
by brian
clean slate |
63 |
}
|
64 |
}
|
|
65 |
else
|
|
66 |
{
|
|
67 |
if (info->current_ptr || (info->update & HA_STATE_NEXT_FOUND)) |
|
68 |
{
|
|
69 |
if ((info->update & HA_STATE_DELETED)) |
|
70 |
pos= hp_search(info, share->keydef + info->lastinx, info->lastkey, 3); |
|
71 |
else
|
|
72 |
pos= hp_search(info, share->keydef + info->lastinx, info->lastkey, 2); |
|
73 |
}
|
|
74 |
else
|
|
75 |
{
|
|
76 |
pos=0; /* Read next after last */ |
|
|
1241.9.57
by Monty Taylor
Oy. Bigger change than I normally like - but this stuff is all intertwined. |
77 |
errno=HA_ERR_KEY_NOT_FOUND; |
|
1
by brian
clean slate |
78 |
}
|
79 |
}
|
|
80 |
if (!pos) |
|
81 |
{
|
|
82 |
info->update=HA_STATE_PREV_FOUND; /* For heap_rprev */ |
|
|
1241.9.57
by Monty Taylor
Oy. Bigger change than I normally like - but this stuff is all intertwined. |
83 |
if (errno == HA_ERR_KEY_NOT_FOUND) |
84 |
errno=HA_ERR_END_OF_FILE; |
|
85 |
return(errno); |
|
|
1
by brian
clean slate |
86 |
}
|
|
244.1.1
by Harrison Fisk
Port Ebay/Google memory storage engine variable width columns. |
87 |
hp_extract_record(share, record, pos); |
|
1
by brian
clean slate |
88 |
info->update=HA_STATE_AKTIV | HA_STATE_PREV_FOUND; |
|
51.3.1
by Jay Pipes
Removed all DBUG symbols from heap storage engine |
89 |
return(0); |
|
1
by brian
clean slate |
90 |
}
|