Drizzled Public API Documentation

hp_rnext.cc
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
15 
16 #include "heap_priv.h"
17 
18 #include <string.h>
19 #include <drizzled/error_t.h>
20 
21 using namespace drizzled;
22 
23 /* Read next record with the same key */
24 
25 int heap_rnext(HP_INFO *info, unsigned char *record)
26 {
27  unsigned char *pos;
28  HP_SHARE *share=info->getShare();
29  HP_KEYDEF *keyinfo;
30 
31  if (info->lastinx < 0)
32  return(errno=HA_ERR_WRONG_INDEX);
33 
34  keyinfo = share->keydef + info->lastinx;
35  {
36  if (info->current_hash_ptr)
37  pos= hp_search_next(info, keyinfo, &info->lastkey[0],
38  info->current_hash_ptr);
39  else
40  {
41  if (!info->current_ptr && (info->update & HA_STATE_NEXT_FOUND))
42  {
43  pos=0; /* Read next after last */
44  errno=HA_ERR_KEY_NOT_FOUND;
45  }
46  else if (!info->current_ptr) /* Deleted or first call */
47  pos= hp_search(info, keyinfo, &info->lastkey[0], 0);
48  else
49  pos= hp_search(info, keyinfo, &info->lastkey[0], 1);
50  }
51  }
52  if (!pos)
53  {
54  info->update=HA_STATE_NEXT_FOUND; /* For heap_rprev */
55  if (errno == HA_ERR_KEY_NOT_FOUND)
56  errno=HA_ERR_END_OF_FILE;
57  return(errno);
58  }
59  hp_extract_record(share, record, pos);
60  info->update=HA_STATE_AKTIV | HA_STATE_NEXT_FOUND;
61  return(0);
62 }
TODO: Rename this file - func.h is stupid.