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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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WCSFTIME(3P) POSIX Programmer's Manual WCSFTIME(3P)
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.
wcsftime — convert date and time to a wide-character string
#include <wchar.h>
size_t wcsftime(wchar_t *restrict wcs, size_t maxsize,
const wchar_t *restrict format, const struct tm *restrict timeptr);
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 wcsftime() function shall be equivalent to the strftime()
function, except that:
* The argument wcs points to the initial element of an array of
wide characters into which the generated output is to be
placed.
* The argument maxsize indicates the maximum number of wide
characters to be placed in the output array.
* The argument format is a wide-character string and the
conversion specifications are replaced by corresponding
sequences of wide characters. It is unspecified whether an
encoding error occurs if the format string contains wchar_t
values that do not correspond to members of the character set
of the current locale.
* Field widths specify the number of wide characters instead of
the number of bytes.
* The return value indicates the number of wide characters
placed in the output array.
If copying takes place between objects that overlap, the behavior
is undefined.
If the total number of resulting wide-character codes including
the terminating null wide-character code is no more than maxsize,
wcsftime() shall return the number of wide-character codes placed
into the array pointed to by wcs, not including the terminating
null wide-character code. Otherwise, zero is returned and the
contents of the array are unspecified.
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
strftime(3p)
The Base Definitions volume of POSIX.1‐2017, wchar.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, 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/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 WCSFTIME(3P)
Pages that refer to this page: wchar.h(0p)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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