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Diffstat (limited to 'storage/myisam/mi_rsame.c')
-rw-r--r--storage/myisam/mi_rsame.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/storage/myisam/mi_rsame.c b/storage/myisam/mi_rsame.c
new file mode 100644
index 00000000000..56c8d1226ca
--- /dev/null
+++ b/storage/myisam/mi_rsame.c
@@ -0,0 +1,66 @@
+/* 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 */
+
+#include "myisamdef.h"
+
+ /*
+ ** Find current row with read on position or read on key
+ ** If inx >= 0 find record using key
+ ** Return values:
+ ** 0 = Ok.
+ ** HA_ERR_KEY_NOT_FOUND = Row is deleted
+ ** HA_ERR_END_OF_FILE = End of file
+ */
+
+
+int mi_rsame(MI_INFO *info, byte *record, int inx)
+{
+ DBUG_ENTER("mi_rsame");
+
+ if (inx != -1 && ! (((ulonglong) 1 << inx) & info->s->state.key_map))
+ {
+ DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
+ }
+ if (info->lastpos == HA_OFFSET_ERROR || info->update & HA_STATE_DELETED)
+ {
+ DBUG_RETURN(my_errno=HA_ERR_KEY_NOT_FOUND); /* No current record */
+ }
+ info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
+
+ /* Read row from data file */
+ if (fast_mi_readinfo(info))
+ DBUG_RETURN(my_errno);
+
+ if (inx >= 0)
+ {
+ info->lastinx=inx;
+ info->lastkey_length=_mi_make_key(info,(uint) inx,info->lastkey,record,
+ info->lastpos);
+ if (info->s->concurrent_insert)
+ rw_rdlock(&info->s->key_root_lock[inx]);
+ VOID(_mi_search(info,info->s->keyinfo+inx,info->lastkey, USE_WHOLE_KEY,
+ SEARCH_SAME,
+ info->s->state.key_root[inx]));
+ if (info->s->concurrent_insert)
+ rw_unlock(&info->s->key_root_lock[inx]);
+ }
+
+ if (!(*info->read_record)(info,info->lastpos,record))
+ DBUG_RETURN(0);
+ if (my_errno == HA_ERR_RECORD_DELETED)
+ my_errno=HA_ERR_KEY_NOT_FOUND;
+ DBUG_RETURN(my_errno);
+} /* mi_rsame */