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Linux / Unix Command: fwide
Command Library

NAME

fwide - set and determine the orientation of a FILE stream  

SYNOPSIS

#include <wchar.h>

int fwide(FILE *stream, int mode);
 

DESCRIPTION

When mode is zero, the fwide function determines the current orientation of stream. It returns a value > 0 if stream 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 stream is byte oriented, i.e. if char I/O is permitted but wide character I/O is disallowed. It returns zero if stream 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.

When mode is non-zero, the fwide function first attempts to set stream'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.  

RETURN VALUE

The fwide function returns the stream's orientation, after possibly changing it. A return value > 0 means wide-character oriented. A return value < 0 means byte oriented. A return value zero means undecided.  

CONFORMING TO

ISO/ANSI C, UNIX98  

SEE ALSO

fprintf(3), fwprintf(3)  

Important: Use the man command (% man) to see how a command is used on your particular computer.

>> Linux/Unix Command Library

>> Shell Command Library

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