Import changeset

1 files changed, 46 insertions, 0 deletions

diff --git a/strings/memcmp.c b/strings/memcmp.c
new file mode 100644
index 00000000000..1bb8deaeac0
--- /dev/null
+++ b/strings/memcmp.c
@@ -0,0 +1,46 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library 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
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA */
+
+/* memcmp(lhs, rhs, len)
+   compares the two memory areas lhs[0..len-1]	??  rhs[0..len-1].   It
+   returns  an integer less than, equal to, or greater than 0 according
+   as lhs[-] is lexicographically less than, equal to, or greater  than
+   rhs[-].  Note  that this is not at all the same as bcmp, which tells
+   you *where* the difference is but not what.
+
+   Note:  suppose we have int x, y;  then memcmp(&x, &y, sizeof x) need
+   not bear any relation to x-y.  This is because byte order is machine
+   dependent, and also, some machines have integer representations that
+   are shorter than a machine word and two equal  integers  might  have
+   different  values  in the spare bits.  On a ones complement machine,
+   -0 == 0, but the bit patterns are different.
+*/
+
+#include "strings.h"
+
+#if !defined(HAVE_MEMCPY)
+
+int memcmp(lhs, rhs, len)
+     register char *lhs, *rhs;
+     register int len;
+{
+  while (--len >= 0)
+    if (*lhs++ != *rhs++) return (uchar) lhs[-1] - (uchar) rhs[-1];
+  return 0;
+}
+
+#endif