1 files changed, 59 insertions, 0 deletions
diff --git a/usr/src/lib/libbc/libc/gen/common/bsearch.c b/usr/src/lib/libbc/libc/gen/common/bsearch.c
new file mode 100644
index 0000000000..d5ee461163
--- /dev/null
+++ b/usr/src/lib/libbc/libc/gen/common/bsearch.c
@@ -0,0 +1,59 @@
+/*
+ * 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 (c) 1984 AT&T */
+/*        All Rights Reserved   */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"  /* from S5R2 1.5 */
+
+/*LINTLIBRARY*/
+/*
+ * Binary search algorithm, generalized from Knuth (6.2.1) Algorithm B.
+ *
+ */
+
+typedef char *POINTER;
+
+POINTER
+bsearch(key, base, nel, width, compar)
+POINTER	key;			/* Key to be located */
+POINTER	base;			/* Beginning of table */
+unsigned nel;			/* Number of elements in the table */
+unsigned width;			/* Width of an element (bytes) */
+int	(*compar)();		/* Comparison function */
+{
+	int two_width = width + width;
+	POINTER last = base + width * (nel - 1); /* Last element in table */
+
+	while (last >= base) {
+
+		register POINTER p = base + width * ((last - base)/two_width);
+		register int res = (*compar)(key, p);
+
+		if (res == 0)
+			return (p);	/* Key found */
+		if (res < 0)
+			last = p - width;
+		else
+			base = p + width;
+	}
+	return ((POINTER) 0);		/* Key not found */
+}