1 files changed, 88 insertions, 0 deletions
diff --git a/newlib/libc/stdio/fwide.c b/newlib/libc/stdio/fwide.c
new file mode 100644
index 0000000..b81327a
--- /dev/null
+++ b/newlib/libc/stdio/fwide.c
@@ -0,0 +1,88 @@
+/*
+FUNCTION
+<<fwide>>---set and determine the orientation of a FILE stream
+
+INDEX
+	fwide
+INDEX
+	_fwide_r
+
+ANSI_SYNOPSIS
+	#include <wchar.h>
+	int fwide(FILE *<[fp]>, int <[mode]>)
+
+	int _fwide_r(struct _reent *<[ptr]>, FILE *<[fp]>, int <[mode]>)
+
+TRAD_SYNOPSIS
+	#include <wchar.h>
+	int fwide(<[fp]>, <[mode]>)
+	FILE *<[fp]>;
+	int <[mode]>;
+
+	int fwide(<[ptr]>, <[fp]>, <[mode]>)
+	struct _reent *<[ptr]>;
+	FILE *<[fp]>;
+	int <[mode]>;
+
+DESCRIPTION
+When <[mode]> is zero, the <<fwide>> function determines the current
+orientation of <[fp]>. It returns a value > 0 if <[fp]> is
+wide-character oriented, i.e. if wide character I/O is permitted but
+char I/O is disallowed. It returns a value < 0 if <[fp]> is byte
+oriented, i.e. if char I/O is permitted but wide character I/O is
+disallowed. It returns zero if <[fp]> has no orientation yet; in
+this case the next I/O operation might change the orientation (to byte
+oriented if it is a char I/O operation, or to wide-character oriented
+if it is a wide character I/O operation).
+
+Once a stream has an orientation, it cannot be changed and persists
+until the stream is closed, unless the stream is re-opened with freopen,
+which removes the orientation of the stream.
+
+When <[mode]> is non-zero, the <<fwide>> function first attempts to set
+<[fp]>'s orientation (to wide-character oriented if <[mode]> > 0, or to
+byte oriented if <[mode]> < 0). It then returns a value denoting the
+current orientation, as above.
+
+RETURNS
+The <<fwide>> function returns <[fp]>'s orientation, after possibly
+changing it. A return value > 0 means wide-character oriented. A return
+value < 0 means byte oriented. A return value of zero means undecided.
+
+PORTABILITY
+C99, POSIX.1-2001.
+
+*/
+
+#include <_ansi.h>
+#include "local.h"
+
+int
+_DEFUN(_fwide_r, (ptr, fp, mode),
+	struct _reent *ptr _AND
+	FILE *fp _AND
+	int mode)
+{
+  int ret;
+
+  CHECK_INIT(ptr, fp);
+
+  _flockfile (fp);
+  if (mode != 0) {
+    ORIENT (fp, mode);
+  }
+  if (!(fp->_flags & __SORD))
+    ret = 0;
+  else
+    ret = (fp->_flags2 & __SWID) ? 1 : -1;
+  _funlockfile (fp);
+  return ret;
+}
+
+int
+_DEFUN(fwide, (fp, mode),
+	FILE *fp _AND
+	int mode)
+{
+  return _fwide_r (_REENT, fp, mode);
+}