From f4c589ff6c653d1d2a09c26e46ead3c8a15655d8 Mon Sep 17 00:00:00 2001
From: "bk@work.mysql.com" <>
Date: Mon, 31 Jul 2000 21:29:14 +0200
Subject: Import changeset

---
 heap/hp_scan.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 heap/hp_scan.c

(limited to 'heap/hp_scan.c')

diff --git a/heap/hp_scan.c b/heap/hp_scan.c
new file mode 100644
index 00000000000..b7684cd2673
--- /dev/null
+++ b/heap/hp_scan.c
@@ -0,0 +1,72 @@
+/* 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 */
+
+/* Scan through all rows */
+
+#include "heapdef.h"
+
+/*
+	   Returns one of following values:
+	   0 = Ok.
+	   HA_ERR_RECORD_DELETED = Record is deleted.
+	   HA_ERR_END_OF_FILE = EOF.
+*/
+
+int heap_scan_init(register HP_INFO *info)
+{
+  DBUG_ENTER("heap_scan_init");
+  info->lastinx= -1;
+  info->current_record= (ulong) ~0L;		/* No current record */
+  info->update=0;
+  info->next_block=0;
+  DBUG_RETURN(0);
+}
+
+int heap_scan(register HP_INFO *info, byte *record)
+{
+  HP_SHARE *share=info->s;
+  ulong pos;
+  DBUG_ENTER("heap_scan");
+
+  pos= ++info->current_record;
+  if (pos < info->next_block)
+  {
+    info->current_ptr+=share->block.recbuffer;
+  }
+  else
+  {
+    info->next_block+=share->block.records_in_block;
+    if (info->next_block >= share->records+share->deleted)
+    {
+      info->next_block= share->records+share->deleted;
+      if (pos >= info->next_block)
+      {
+	info->update= 0;
+	DBUG_RETURN(my_errno= HA_ERR_END_OF_FILE);
+      }
+    }
+    _hp_find_record(info,pos);
+  }
+  if (!info->current_ptr[share->reclength])
+  {
+    info->update= HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND;
+    DBUG_RETURN(my_errno=HA_ERR_RECORD_DELETED);
+  }
+  info->update= HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND | HA_STATE_AKTIV;
+  memcpy(record,info->current_ptr,(size_t) share->reclength);
+  info->current_hash_ptr=0;			/* Can't use read_next */
+  DBUG_RETURN(0);
+} /* heap_scan */
-- 
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