1 files changed, 40 insertions, 0 deletions
diff --git a/externals/mysql/mysys/checksum.c b/externals/mysql/mysys/checksum.c
new file mode 100644
index 00000000000..1d264b54321
--- /dev/null
+++ b/externals/mysql/mysys/checksum.c
@@ -0,0 +1,40 @@
+/* Copyright (C) 2000 MySQL 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; 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+
+#include <my_global.h>
+#include <my_sys.h>
+#include <zlib.h>
+
+ha_checksum my_crc_dbug_check= 1;               /* Unlikely number */
+
+/*
+  Calculate a long checksum for a memoryblock.
+
+  SYNOPSIS
+    my_checksum()
+      crc       start value for crc
+      pos       pointer to memory block
+      length    length of the block
+*/
+
+ha_checksum my_checksum(ha_checksum crc, const uchar *pos, size_t length)
+{
+  crc= (ha_checksum) crc32((uint)crc, pos, length);
+  DBUG_PRINT("info", ("crc: %lu", (ulong) crc));
+  if (crc == my_crc_dbug_check)
+    my_debug_put_break_here();
+  return crc;
+}