1 files changed, 54 insertions, 0 deletions
diff --git a/usr/src/lib/libbc/libc/gen/common/swab.c b/usr/src/lib/libbc/libc/gen/common/swab.c
new file mode 100644
index 0000000000..19c50d1e99
--- /dev/null
+++ b/usr/src/lib/libbc/libc/gen/common/swab.c
@@ -0,0 +1,54 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+	  /* from UCB 4.2 83/06/27 */
+
+/*
+ * Swab bytes
+ * Jeffrey Mogul, Stanford
+ */
+
+void
+swab(from, to, n)
+	register char *from, *to;
+	register int n;
+{
+	register unsigned long temp;
+	
+	if (n <= 1)
+		return;
+	n >>= 1; n++;
+#define	STEP	temp = *from++,*to++ = *from++,*to++ = temp
+	/* round to multiple of 8 */
+	while ((--n) & 07)
+		STEP;
+	n >>= 3;
+	while (--n >= 0) {
+		STEP; STEP; STEP; STEP;
+		STEP; STEP; STEP; STEP;
+	}
+}