fwide man page on DigitalUNIX

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fwide(3)							      fwide(3)

NAME
       fwide - Set stream orientation to byte or wide-character

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

       int fwide(
	       FILE *stream,
		int mode );

LIBRARY
       Standard C Library (libc)

STANDARDS
       Interfaces  documented on this reference page conform to industry stan‐
       dards as follows:

       fwide(): XSH5.0

       Refer to the standards(5) reference page	 for  more  information	 about
       industry standards and associated tags.

PARAMETERS
       Points to a FILE structure specifying an open stream Specifies an inte‐
       ger that determines the orientation of the stream. If  the  integer  is
       greater	than zero, the function attempts to make the stream wide-char‐
       acter oriented. If the integer is less than zero, the function attempts
       to  make the stream byte oriented. If the integer is zero, the function
       does not attempt to alter the stream orientation.

DESCRIPTION
       The fwide() function, depending on the value  of	 the  mode  parameter,
       sets or queries the orientation of a stream of data specified by a FILE
       structure.

       If the stream has no orientation, a positive  or	 negative  mode	 value
       causes  the function to change the stream orientation to wide character
       or byte, respectively. The function does not change stream  orientation
       when it is already set. When the stream orientation is already set, the
       application must first call freopen() to reinitialize  the  stream  and
       then call fwide() to reset the stream orientation.

       A  mode	value of zero causes the function to return the current stream
       orientation without attempting to change it.

RETURN VALUES
       The fwide() function returns an integer value to	 indicate  the	stream
       orientation  after  the call. The function returns a value greater than
       zero if the stream orientation is wide-character,  a  value  less  than
       zero  if the stream orientation is byte, and 0 (zero) if the stream has
       no orientation. On error, the function returns 0 (zero) and sets	 errno
       to indicate the condition.

ERRORS
       The file descriptor associated with stream is invalid.

SEE ALSO
       Functions: fopen(3)

								      fwide(3)
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