release/src/router/mysql/storage/heap/hp_rsame.c

   1 /* Copyright (c) 2000-2002, 2005-2007 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 Street, Fifth Floor, Boston, MA  02110-1301, USA */
  15
  16 /* re-read current record */
  17
  18 #include "heapdef.h"
  19
  20         /* If inx != -1 the new record is read according to index
  21            (for next/prev). Record must in this case point to last record
  22            Returncodes:
  23            0 = Ok.
  24            HA_ERR_RECORD_DELETED = Record was removed
  25            HA_ERR_KEY_NOT_FOUND = Record not found with key
  26         */
  27
  28 int heap_rsame(register HP_INFO *info, uchar *record, int inx)
  29 {
  30   HP_SHARE *share=info->s;
  31   DBUG_ENTER("heap_rsame");
  32
  33   test_active(info);
  34   if (info->current_ptr[share->reclength])
  35   {
  36     if (inx < -1 || inx >= (int) share->keys)
  37     {
  38       DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
  39     }
  40     else if (inx != -1)
  41     {
  42       info->lastinx=inx;
  43       hp_make_key(share->keydef + inx, info->lastkey, record);
  44       if (!hp_search(info, share->keydef + inx, info->lastkey, 3))
  45       {
  46         info->update=0;
  47         DBUG_RETURN(my_errno);
  48       }
  49     }
  50     memcpy(record,info->current_ptr,(size_t) share->reclength);
  51     DBUG_RETURN(0);
  52   }
  53   info->update=0;
  54
  55   DBUG_RETURN(my_errno=HA_ERR_RECORD_DELETED);
  56 }