diff options
Diffstat (limited to 'isam/rsame.c')
-rw-r--r-- | isam/rsame.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/isam/rsame.c b/isam/rsame.c new file mode 100644 index 00000000000..fe617cf258c --- /dev/null +++ b/isam/rsame.c @@ -0,0 +1,70 @@ +/* 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 */ + +/* L{ser nuvarande record med direktl{sning */ +/* Klarar b}de poster l{sta med nyckel och rrnd. */ + +#include "isamdef.h" + + /* Funktionen ger som resultat: + 0 = Ok. + 1 = Posten borttagen + -1 = EOF (eller motsvarande: se errno) */ + + +int nisam_rsame(N_INFO *info, byte *record, int inx) + + + /* If inx >= 0 find record using key */ +{ + DBUG_ENTER("nisam_rsame"); + + if (inx >= (int) info->s->state.keys || inx < -1) + { + my_errno=HA_ERR_WRONG_INDEX; + DBUG_RETURN(-1); + } + if (info->lastpos == NI_POS_ERROR || info->update & HA_STATE_DELETED) + { + my_errno=HA_ERR_KEY_NOT_FOUND; /* No current record */ + DBUG_RETURN(-1); + } + info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED); + + /* L{s record fr}n datafilen */ + +#ifndef NO_LOCKING + if (_nisam_readinfo(info,F_RDLCK,1)) + DBUG_RETURN(-1); +#endif + + if (inx >= 0) + { + info->lastinx=inx; + VOID(_nisam_make_key(info,(uint) inx,info->lastkey,record,info->lastpos)); + VOID(_nisam_search(info,info->s->keyinfo+inx,info->lastkey,0,SEARCH_SAME, + info->s->state.key_root[inx])); + } + + if ((*info->read_record)(info,info->lastpos,record) == 0) + DBUG_RETURN(0); + if (my_errno == HA_ERR_RECORD_DELETED) + { + my_errno=HA_ERR_KEY_NOT_FOUND; + DBUG_RETURN(1); + } + DBUG_RETURN(-1); +} /* nisam_rsame */ |