FWIDE(3)                   Library Functions Manual                   FWIDE(3)

NAME
     fwide - get/set orientation of a stream

LIBRARY
     Standard C Library (libc, -lc)

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

     int
     fwide(FILE *stream, int mode);

DESCRIPTION
     The fwide() function determines the orientation of the stream pointed at
     by stream.

     If the orientation of stream has already been determined, fwide() leaves
     it unchanged.  Otherwise, fwide() sets the orientation of stream
     according to mode.

     If mode is less than zero, stream is set to be byte-oriented.  If mode is
     greater than zero, stream is set to be wide-oriented.  Otherwise, mode is
     zero, and stream is unchanged.

RETURN VALUES
     The fwide() function returns a value according to orientation after the
     call of fwide(); a value less than zero if byte-oriented, a value greater
     than zero if wide-oriented, and zero if the stream has no orientation.

SEE ALSO
     ferror(3), fgetc(3), fgetwc(3), fopen(3), fputc(3), fputwc(3),
     freopen(3), stdio(3)

STANDARDS
     The fwide() function conforms to ISO/IEC 9899:1999 ("ISO C99").

macOS 26.6                     October 24, 2001                     macOS 26.6