fwide() — set stream orientation
int fwide(FILE *stream, int mode);
function determines the orientation of the stream pointed to by
is greater than zero,
the function first attempts to make the
is less than zero, the function first attempts to make the
is zero and the function does not alter the orientation of the stream.
If the orientation of the stream has already been determined,
does not change it.
Because no return value is reserved to indicate an error,
an application wishing to check for error situations should set
to 0, then call
and if it is non-zero, assume an error has occurred.
A call to
set to 0 can be used to determine the current orientation of a stream.
The prototype of this function is available to applications
if they are:
macro with a value >=500.
macro with a value >= 200112.
function returns 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 orientation.
function may fail if:
argument is not a valid stream.
was developed by HP and Mitsubishi Electric Corporation.