Imported Upstream version 93u+upstream

1 files changed, 51 insertions, 0 deletions

diff --git a/src/lib/libast/stdio/fwide.c b/src/lib/libast/stdio/fwide.c
new file mode 100644
index 0000000..efcb453
--- /dev/null
+++ b/src/lib/libast/stdio/fwide.c
@@ -0,0 +1,51 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+
+#include "stdhdr.h"
+
+int
+fwide(Sfio_t* f, int mode)
+{
+	STDIO_INT(f, "fwide", int, (Sfio_t*, int), (f, mode))
+
+	if (mode > 0)
+	{
+		f->bits &= ~SF_MB;
+		f->bits |= SF_WC;
+	}
+	else if (mode < 0)
+	{
+		f->bits &= ~SF_WC;
+		f->bits |= SF_MB;
+	}
+	if (f->bits & SF_MB)
+		return -1;
+	if (f->bits & SF_WC)
+		return 1;
+	if ((f->flags & SF_SYNCED) || f->next > f->data)
+	{
+		f->bits |= SF_MB;
+		return -1;
+	}
+	return 0;
+}