diff options
Diffstat (limited to 'isam/rsamepos.c')
| -rw-r--r-- | isam/rsamepos.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/isam/rsamepos.c b/isam/rsamepos.c new file mode 100644 index 00000000000..500dfc60e38 --- /dev/null +++ b/isam/rsamepos.c @@ -0,0 +1,59 @@ +/* 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 */ + +/* read record through position and fix key-position */ +/* As nisam_rsame but supply a position */ + +#include "isamdef.h" + + + /* + ** If inx >= 0 update index pointer + ** Returns one of the following values: + ** 0 = Ok. + ** 1 = Record deleted + ** -1 = EOF (or something similar. More information in my_errno) + */ + +int nisam_rsame_with_pos(N_INFO *info, byte *record, int inx, ulong filepos) +{ + DBUG_ENTER("nisam_rsame_with_pos"); + + if (inx >= (int) info->s->state.keys || inx < -1) + { + my_errno=HA_ERR_WRONG_INDEX; + DBUG_RETURN(-1); + } + + info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED); + if ((*info->s->read_rnd)(info,record,filepos,0)) + { + if (my_errno == HA_ERR_RECORD_DELETED) + { + my_errno=HA_ERR_KEY_NOT_FOUND; + DBUG_RETURN(1); + } + DBUG_RETURN(-1); + } + info->lastpos=filepos; + info->lastinx=inx; + if (inx >= 0) + { + VOID(_nisam_make_key(info,(uint) inx,info->lastkey,record,info->lastpos)); + info->update|=HA_STATE_KEY_CHANGED; /* Don't use indexposition */ + } + DBUG_RETURN(0); +} /* nisam_rsame_pos */ |