wcsncpy(3p) — Linux manual page


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

PROLOG         top

       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         top

       wcpncpy, wcsncpy — copy a fixed-size wide-character string,
       returning a pointer to its end

SYNOPSIS         top

       #include <wchar.h>

       wchar_t *wcpncpy(wchar_t restrict *ws1, const wchar_t *restrict ws2,
           size_t n);
       wchar_t *wcsncpy(wchar_t *restrict ws1, const wchar_t *restrict ws2,
           size_t n);

DESCRIPTION         top

       For wcsncpy(): 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

       The wcpncpy() and wcsncpy() functions shall copy not more than n
       wide-character codes (wide-character codes that follow a null
       wide-character code are not copied) from the array pointed to by
       ws2 to the array pointed to by ws1.  If copying takes place
       between objects that overlap, the behavior is undefined.

       If the array pointed to by ws2 is a wide-character string that is
       shorter than n wide-character codes, null wide-character codes
       shall be appended to the copy in the array pointed to by ws1,
       until n wide-character codes in all are written.

RETURN VALUE         top

       If any null wide-character codes were written into the
       destination, the wcpncpy() function shall return the address of
       the first such null wide-character code. Otherwise, it shall
       return &ws1[n].

       The wcsncpy() function shall return ws1.

       No return values are reserved to indicate an error.

ERRORS         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top



       If there is no null wide-character code in the first n wide-
       character codes of the array pointed to by ws2, the result is not

RATIONALE         top




SEE ALSO         top

       strncpy(3p), wcscpy(3p)

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

COPYRIGHT         top

       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                       WCSNCPY(3P)

Pages that refer to this page: wchar.h(0p)strncpy(3p)wcpncpy(3p)wcscpy(3p)