From NetBSD: Merge with NetBSD 960217

1 files changed, 66 insertions, 0 deletions

diff --git a/sys/lib/libkern/strncasecmp.c b/sys/lib/libkern/strncasecmp.c
new file mode 100644
index 00000000000..a0c6633adeb
--- /dev/null
+++ b/sys/lib/libkern/strncasecmp.c
@@ -0,0 +1,66 @@
+/*	$OpenBSD: strncasecmp.c,v 1.1 1996/02/29 13:27:50 niklas Exp $	*/
+
+/*
+ * Copyright (c) 1994 Christian E. Hopps
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Christian E. Hopps.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$Id: strncasecmp.c,v 1.1 1996/02/29 13:27:50 niklas Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <string.h>
+
+int
+strncasecmp(s1, s2, n)
+	const char *s1;
+	const char *s2;
+	size_t n;
+{
+	if (n == 0)
+		return 0;
+
+	do {
+		unsigned char c1 = (unsigned char) *s1++;
+		unsigned char c2 = (unsigned char) *s2++;
+
+		if (c1 != c2) {
+			if (c1 >= 'A' && c1 <= 'Z' && 
+			    c2 >= 'a' && c2 <= 'z')
+				c1 += 'a' - 'A';
+			else if (c1 >= 'a' && c1 <= 'z' && 
+				 c2 >= 'A' && c2 <= 'Z')
+				c2 += 'a' - 'A';
+			if (c1 != c2)
+				return c1 - c2;
+		}
+		if (c1 == 0)
+			break;
+	} while (--n != 0);
+
+	return 0;
+}