1 files changed, 64 insertions, 0 deletions
diff --git a/lib/libc/stdio/fwide.c b/lib/libc/stdio/fwide.c
new file mode 100644
index 00000000000..6fd31b0e73e
--- /dev/null
+++ b/lib/libc/stdio/fwide.c
@@ -0,0 +1,64 @@
+/*	$OpenBSD: fwide.c,v 1.1 2005/06/17 20:40:32 espie Exp $	*/
+/* $NetBSD: fwide.c,v 1.2 2003/01/18 11:29:54 thorpej Exp $ */
+
+/*-
+ * Copyright (c)2001 Citrus Project,
+ * 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.
+ *
+ * $Citrus$
+ */
+
+#include <stdio.h>
+#include <wchar.h>
+#include "local.h"
+
+int
+fwide(FILE *fp, int mode)
+{
+	struct wchar_io_data *wcio;
+
+	/*
+	 * this implementation use only -1, 0, 1
+	 * for mode value.
+	 * (we don't need to do this, but
+	 *  this can make things simpler.)
+	 */
+	if (mode > 0)
+		mode = 1;
+	else if (mode < 0)
+		mode = -1;
+
+	flockfile(fp);
+	wcio = WCIO_GET(fp);
+	if (!wcio)
+		return 0; /* XXX */
+
+	if (wcio->wcio_mode == 0 && mode != 0)
+		wcio->wcio_mode = mode;
+	else
+		mode = wcio->wcio_mode;
+	funlockfile(fp);
+
+	return mode;
+}