1 files changed, 82 insertions, 0 deletions
diff --git a/strings/bzero.c b/strings/bzero.c
new file mode 100644
index 00000000000..59c7a19385e
--- /dev/null
+++ b/strings/bzero.c
@@ -0,0 +1,82 @@
+/* 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 */
+
+/*  File   : bzero.c
+    Author : Richard A. O'Keefe.
+	     Michael Widenius;	ifdef MC68000
+    Updated: 23 April 1984
+    Defines: bzero()
+
+    bzero(dst, len) moves "len" 0 bytes to "dst".
+    Thus to clear a disc buffer to 0s do bzero(buffer, BUFSIZ).
+
+    Note: the "b" routines are there to exploit certain VAX order codes,
+    The asm code is presented for your interest and amusement.
+*/
+
+#ifndef BSD_FUNCS
+#include "strings.h"
+
+#ifdef bzero
+#undef bzero					/* remove macro */
+#endif
+
+#if VaxAsm
+
+static void _bzero64 _A((void *dst,int	len));
+
+void bzero(dst, len)
+void *dst;
+uint len;
+{
+  while ((int) len >= 64*K)
+  {
+    _bzero64(dst, 64*K-1);
+    dst += 64*K-1;
+    len -= 64*K-1;
+  }
+  _bzero64(dst, len);
+}
+
+_bzero64(dst, len)
+void *dst;
+int  len;
+{
+  asm("movc5 $0,*4(ap),$0,8(ap),*4(ap)");
+}
+
+#else
+
+#if defined(MC68000) && defined(DS90)
+
+void bzero(dst, len)
+void *dst;
+uint len;
+{
+  bfill(dst,len,0);				/* This is very optimized ! */
+} /* bzero */
+
+#else
+
+void bzero(dst, len)
+register void *dst;
+register uint len;
+{
+  while (len-- != 0) *dst++ = 0;
+} /* bzero */
+
+#endif
+#endif
+#endif /* BSD_FUNCS */