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hp_rnext.c
Package: mysql-3.23.35.tar.gz [view]
Upload User: tsgydb
Upload Date: 2007-04-14
Package Size: 10674k
Code Size: 2k
Category:
MySQL
Development Platform:
Visual C++
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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; either version 2 of the License, or
- (at your option) any later version.
- 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"
- /* Read next record with the same key */
- int heap_rnext(HP_INFO *info, byte *record)
- {
- byte *pos;
- HP_SHARE *share=info->s;
- DBUG_ENTER("heap_rnext");
- if (info->lastinx < 0)
- DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
- if (info->current_hash_ptr)
- pos= _hp_search_next(info,share->keydef+info->lastinx, info->lastkey,
- info->current_hash_ptr);
- else
- {
- if (!info->current_ptr && (info->update & HA_STATE_NEXT_FOUND))
- {
- pos=0; /* Read next after last */
- my_errno=HA_ERR_KEY_NOT_FOUND;
- }
- else if (!info->current_ptr) /* Deleted or first call */
- pos= _hp_search(info,share->keydef+info->lastinx, info->lastkey, 0);
- else
- pos= _hp_search(info,share->keydef+info->lastinx, info->lastkey, 1);
- }
- if (!pos)
- {
- info->update=HA_STATE_NEXT_FOUND; /* For heap_rprev */
- if (my_errno == HA_ERR_KEY_NOT_FOUND)
- my_errno=HA_ERR_END_OF_FILE;
- DBUG_RETURN(my_errno);
- }
- memcpy(record,pos,(size_t) share->reclength);
- info->update=HA_STATE_AKTIV | HA_STATE_NEXT_FOUND;
- DBUG_RETURN(0);
- }