1 files changed, 72 insertions, 0 deletions
diff --git a/StdLib/LibC/Stdio/fwide.c b/StdLib/LibC/Stdio/fwide.c
new file mode 100644
index 0000000000..b89b7a3811
--- /dev/null
+++ b/StdLib/LibC/Stdio/fwide.c
@@ -0,0 +1,72 @@
+/* $NetBSD: fwide.c,v 1.3 2005/06/12 05:21:27 lukem 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  <LibConfig.h>
+#include <sys/EfiCdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+__RCSID("$NetBSD: fwide.c,v 1.3 2005/06/12 05:21:27 lukem Exp $");
+#endif /* LIBC_SCCS and not lint */
+
+#include <assert.h>
+#include <stdio.h>
+#include <wchar.h>
+#include "reentrant.h"
+#include "local.h"
+
+int
+fwide(FILE *fp, int mode)
+{
+  struct wchar_io_data *wcio;
+
+  _DIAGASSERT(fp != NULL);
+
+  /*
+   * 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;
+}