wcsftime(3p) — Linux manual page

WCSFTIME(3P)            POSIX Programmer's Manual           WCSFTIME(3P)

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

       wcsftime — convert date and time to a wide-character string

SYNOPSIS

       #include <wchar.h>

       size_t wcsftime(wchar_t *restrict wcs, size_t maxsize,
           const wchar_t *restrict format, const struct tm *restrict timeptr);

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 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.

RETURN VALUE

       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.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       strftime(3p)

       The Base Definitions volume of POSIX.1‐2017, wchar.h(0p)

COPYRIGHT

       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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