From a231d5c7d0005ab35af9cfa29e859bc9a3a9cac9 Mon Sep 17 00:00:00 2001
From: John Marino <draco@marino.st>
Date: Mon, 21 Nov 2011 23:13:43 +0100
Subject: [PATCH] libc: Add wcscasecmp function

This function performs a case-insensitive string comparison test on
wide characters.  It is a GNU extension, not POSIX.  Some packages
in pkgsrc require it.
---
 include/wchar.h              |  1 +
 lib/libc/string/Makefile.inc |  2 ++
 lib/libc/string/wcscasecmp.c | 42 ++++++++++++++++++++++++++++++++++++
 lib/libc/string/wmemchr.3    |  6 +++++-
 4 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 lib/libc/string/wcscasecmp.c

diff --git a/include/wchar.h b/include/wchar.h
index 770332b750..9a7e0277d0 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -133,6 +133,7 @@ wchar_t	*wcscpy(wchar_t * __restrict, const wchar_t * __restrict);
 size_t	wcscspn(const wchar_t *, const wchar_t *);
 size_t	wcsftime(wchar_t * __restrict, size_t, const wchar_t * __restrict,
 		 const struct tm * __restrict);
+int	wcscasecmp(const wchar_t *, const wchar_t *);
 size_t	wcslen(const wchar_t *);
 wchar_t	*wcsncat(wchar_t * __restrict, const wchar_t * __restrict, size_t);
 int	wcsncmp(const wchar_t *, const wchar_t *, size_t);
diff --git a/lib/libc/string/Makefile.inc b/lib/libc/string/Makefile.inc
index cb52808237..c6b60b042c 100644
--- a/lib/libc/string/Makefile.inc
+++ b/lib/libc/string/Makefile.inc
@@ -18,6 +18,7 @@ MISRCS+=bcmp.c bcopy.c bzero.c ffs.c ffsl.c ffsll.c fls.c flsl.c flsll.c \
 	wcscspn.c wcsdup.c \
 	wcslcat.c wcslcpy.c wcslen.c wcsncat.c wcsncmp.c wcsncpy.c wcsnlen.c \
 	wcspbrk.c \
+	wcscasecmp.c \
 	wcsrchr.c wcsspn.c wcsstr.c wcstok.c wcswidth.c wcsxfrm.c wmemchr.c \
 	wmemcmp.c \
 	wmemcpy.c wmemmove.c wmemset.c
@@ -75,6 +76,7 @@ MLINKS+=wmemchr.3 wcscat.3 \
 	wmemchr.3 wcsrchr.3 \
 	wmemchr.3 wcsspn.3 \
 	wmemchr.3 wcsstr.3 \
+	wmemchr.3 wcscasecmp.3 \
 	wmemchr.3 wmemcmp.3 \
 	wmemchr.3 wmemcpy.3 \
 	wmemchr.3 wmemmove.3 \
diff --git a/lib/libc/string/wcscasecmp.c b/lib/libc/string/wcscasecmp.c
new file mode 100644
index 0000000000..1f5630d96e
--- /dev/null
+++ b/lib/libc/string/wcscasecmp.c
@@ -0,0 +1,42 @@
+/*-
+ * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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>
+
+int
+wcscasecmp(const wchar_t *s1, const wchar_t *s2)
+{
+	wchar_t c1, c2;
+
+	for (; *s1; s1++, s2++) {
+		c1 = towlower(*s1);
+		c2 = towlower(*s2);
+		if (c1 != c2)
+			return ((int)c1 - c2);
+	}
+	return (-*s2);
+}
diff --git a/lib/libc/string/wmemchr.3 b/lib/libc/string/wmemchr.3
index 5528943d2c..f26abc7714 100644
--- a/lib/libc/string/wmemchr.3
+++ b/lib/libc/string/wmemchr.3
@@ -36,7 +36,7 @@
 .\" $FreeBSD: src/lib/libc/string/wmemchr.3,v 1.8 2007/01/09 00:28:12 imp Exp $
 .\" $DragonFly: src/lib/libc/string/wmemchr.3,v 1.2 2003/06/17 04:26:47 dillon Exp $
 .\"
-.Dd April 23, 2009
+.Dd November 21, 2011
 .Dt WMEMCHR 3
 .Os
 .Sh NAME
@@ -45,6 +45,7 @@
 .Nm wmemcpy ,
 .Nm wmemmove ,
 .Nm wmemset ,
+.Nm wcscasecmp ,
 .Nm wcscat ,
 .Nm wcschr ,
 .Nm wcscmp ,
@@ -77,6 +78,8 @@
 .Fn wmemmove "wchar_t *s1" "const wchar_t *s2" "size_t n"
 .Ft wchar_t *
 .Fn wmemset "wchar_t *s" "wchar_t c" "size_t n"
+.Ft int
+.Fn wcscasecmp "const wchar_t *s1" "const wchar_t *s2"
 .Ft wchar_t *
 .Fn wcscat "wchar_t * restrict s1" "const wchar_t * restrict s2"
 .Ft wchar_t *
@@ -146,6 +149,7 @@ counterpart, such as
 These functions conform to
 .St -isoC-99 ,
 with the exception of
+.Fn wcscasecmp ,
 .Fn wcsdup ,
 and
 .Fn wcsnlen ,
-- 
2.41.0