getwc - Man Page

get a wide character from a stream


This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.


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

wint_t getwc(FILE *stream);


The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C standard.

The getwc() function shall be equivalent to fgetwc(), except that if it is implemented as a macro it may evaluate stream more than once, so the argument should never be an expression with side-effects.

Return Value

Refer to fgetwc().


Refer to fgetwc().

The following sections are informative.



Application Usage

Since it may be implemented as a macro, getwc() may treat incorrectly a stream argument with side-effects. In particular, getwc(*f++) does not necessarily work as expected. Therefore, use of this function is not recommended; fgetwc() should be used instead.



Future Directions


See Also

Section 2.5, Standard I/O Streams, fgetwc()

The Base Definitions volume of POSIX.1-2017, <stdio.h>, <wchar.h>

Referenced By

fwscanf(3p), getwchar(3p), wchar.h(0p).

2017 IEEE/The Open Group POSIX Programmer's Manual