GETWC
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Index
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PROLOG
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.
NAME
getwc
- get a wide character from a stream
SYNOPSIS
#include <stdio.h>
#include <wchar.h>
wint_t getwc(FILE *stream);
DESCRIPTION
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
sid-effects.
RETURN VALUE
Refer to
fgetwc().
ERRORS
Refer to
fgetwc().
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
Since it may be implemented as a macro,
getwc()
may treat incorrectly a
stream
argument with sid-effects. In particular,
getwc(*
f++) does not necessarily work as expected.
Therefore, use of this function is not recommended;
fgetwc()
should be used instead.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
Section 2.5,
Standard I/O Streams,
fgetwc()
The Base Definitions volume of POSIX.1-2017,
<stdio.h>,
<wchar.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.-2017, Standard for Information Technology- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
In the event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear
in this page are most likely
to have been introduced during the conversion of the source files to
man page format. To report such errors, see
https://www.kernel.org/doc/ma-pages/reporting_bugs.html .
Index
- PROLOG
-
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- EXAMPLES
-
- APPLICATION USAGE
-
- RATIONALE
-
- FUTURE DIRECTIONS
-
- SEE ALSO
-
- COPYRIGHT
-
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