1 files changed, 69 insertions, 0 deletions
diff --git a/usr/src/lib/libc/port/i18n/strcasestr.c b/usr/src/lib/libc/port/i18n/strcasestr.c
new file mode 100644
index 0000000000..a8f590263a
--- /dev/null
+++ b/usr/src/lib/libc/port/i18n/strcasestr.c
@@ -0,0 +1,69 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (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) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*	Copyright (c) 1988 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+#include "lint.h"
+#include <string.h>
+#include <ctype.h>
+#include <sys/types.h>
+
+/*
+ * strcasestr() locates the first occurrence in the string s1 of the
+ * sequence of characters (excluding the terminating null character)
+ * in the string s2, ignoring case.  strcasestr() returns a pointer
+ * to the located string, or a null pointer if the string is not found.
+ * If s2 is empty, the function returns s1.
+ */
+
+char *
+strcasestr(const char *s1, const char *s2)
+{
+	int *cm = __trans_lower;
+	const uchar_t *us1 = (const uchar_t *)s1;
+	const uchar_t *us2 = (const uchar_t *)s2;
+	const uchar_t *tptr;
+	int c;
+
+	if (us2 == NULL || *us2 == '\0')
+		return ((char *)us1);
+
+	c = cm[*us2];
+	while (*us1 != '\0') {
+		if (c == cm[*us1++]) {
+			tptr = us1;
+			while (cm[c = *++us2] == cm[*us1++] && c != '\0')
+				continue;
+			if (c == '\0')
+				return ((char *)tptr - 1);
+			us1 = tptr;
+			us2 = (const uchar_t *)s2;
+			c = cm[*us2];
+		}
+	}
+
+	return (NULL);
+}