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FWIDE(P)		   POSIX Programmer's Manual		      FWIDE(P)

NAME
       fwide - set stream orientation

SYNOPSIS
       #include <stdio.h>
       #include <wchar.h>

       int fwide(FILE *stream, int mode);

DESCRIPTION
       The  fwide()  function  shall  determine	 the orientation of the stream
       pointed to by stream. If mode is greater than zero, the function	 first
       attempts	 to make the stream wide-oriented.  If mode is less than zero,
       the function first attempts to make the	stream	byte-oriented.	Other‐
       wise,  mode  is zero and the function does not alter the orientation of
       the stream.

       If the orientation of the stream has already been  determined,  fwide()
       shall not change it.

       Since  no return value is reserved to indicate an error, an application
       wishing to check for error situations should set errno to 0, then  call
       fwide(),	 then  check errno, and if it is non-zero, assume an error has
       occurred.

RETURN VALUE
       The fwide() function shall return a value greater than zero  if,	 after
       the  call,  the	stream has wide-orientation, a value less than zero if
       the stream has byte-orientation, or zero if the stream has no  orienta‐
       tion.

ERRORS
       The fwide() function may fail if:

       EBADF  The stream argument is not a valid stream.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       A  call	to  fwide() with mode set to zero can be used to determine the
       current orientation of a stream.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       The Base Definitions volume of IEEE Std 1003.1-2001, <wchar.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),	The  Open  Group  Base
       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the	referee document. The original Standard can be obtained online
       at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group		     2003			      FWIDE(P)
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