wcs(n)casecmp support, manpage comments from jmc@, okay deraadt@

1 files changed, 61 insertions, 0 deletions

diff --git a/lib/libc/string/wcscasecmp.c b/lib/libc/string/wcscasecmp.c
new file mode 100644
index 00000000000..d4085ad3e87
--- /dev/null
+++ b/lib/libc/string/wcscasecmp.c
@@ -0,0 +1,61 @@
+/*	$OpenBSD: wcscasecmp.c,v 1.1 2011/05/28 15:16:46 espie Exp $ */
+
+/*
+ * Copyright (c) 2011 Marc Espie
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
+ * ``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 OPENBSD
+ * PROJECT OR CONTRIBUTORS 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.
+ */
+
+#include <wchar.h>
+#include <wctype.h>
+#include "locale/runetype.h"
+
+int
+wcscasecmp(const wchar_t *s1, const char *s2)
+{
+	wchar_t l1, l2;
+
+	while ((l1 = towlower(*s1++)) == (l2 = towlower(*s2++))) {
+		if (l1 == 0)
+			return (0);
+	}
+	/* XXX assumes wchar_t = int */
+	return ((rune_t)l1 - (rune_t)l2);
+}
+
+int
+wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n)
+{
+	wchar_t l1, l2;
+
+	if (n == 0)
+		return (0);
+	do {
+		if (((l1 = towlower(*s1++))) != (l2 = towlower(*s2++))) {
+			/* XXX assumes wchar_t = int */
+			return ((rune_t)l1 - (rune_t)l2);
+		}
+		if (l1 == 0)
+			break;
+	} while (--n != 0);
+	return (0);
+}