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56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* read record through position and fix key-position */
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/* As mi_rsame but supply a position */
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#include "myisamdef.h"
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/*
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** If inx >= 0 update index pointer
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** Returns one of the following values:
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** 0 = Ok.
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** HA_ERR_KEY_NOT_FOUND = Row is deleted
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** HA_ERR_END_OF_FILE = End of file
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*/
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int mi_rsame_with_pos(MI_INFO *info, byte *record, int inx, my_off_t filepos)
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{
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DBUG_ENTER("mi_rsame_with_pos");
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if (inx < -1 || ! (((ulonglong) 1 << inx) & info->s->state.key_map))
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{
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DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
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}
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info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
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if ((*info->s->read_rnd)(info,record,filepos,0))
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{
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if (my_errno == HA_ERR_RECORD_DELETED)
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my_errno=HA_ERR_KEY_NOT_FOUND;
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DBUG_RETURN(my_errno);
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}
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info->lastpos=filepos;
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info->lastinx=inx;
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if (inx >= 0)
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{
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info->lastkey_length=_mi_make_key(info,(uint) inx,info->lastkey,record,
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info->lastpos);
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info->update|=HA_STATE_KEY_CHANGED; /* Don't use indexposition */
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}
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DBUG_RETURN(0);
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} /* mi_rsame_pos */
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