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-rw-r--r--storage/myisam/mi_scan.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/storage/myisam/mi_scan.c b/storage/myisam/mi_scan.c
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+++ b/storage/myisam/mi_scan.c
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+/* Copyright (c) 2000, 2001, 2005-2007 MySQL AB
+ Use is subject to license terms
+
+ 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; version 2 of the License.
+
+ 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+/* Read through all rows sequntially */
+
+#include "myisamdef.h"
+
+int mi_scan_init(register MI_INFO *info)
+{
+ DBUG_ENTER("mi_scan_init");
+ info->nextpos=info->s->pack.header_length; /* Read first record */
+ info->lastinx= -1; /* Can't forward or backward */
+ if (info->opt_flag & WRITE_CACHE_USED && flush_io_cache(&info->rec_cache))
+ DBUG_RETURN(my_errno);
+ DBUG_RETURN(0);
+}
+
+/*
+ Read a row based on position.
+ If filepos= HA_OFFSET_ERROR then read next row
+ Return values
+ Returns one of following values:
+ 0 = Ok.
+ HA_ERR_END_OF_FILE = EOF.
+*/
+
+int mi_scan(MI_INFO *info, uchar *buf)
+{
+ DBUG_ENTER("mi_scan");
+ /* Init all but update-flag */
+ info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
+ DBUG_RETURN ((*info->s->read_rnd)(info,buf,info->nextpos,1));
+}