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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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WCSNCPY(3P) POSIX Programmer's Manual WCSNCPY(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.
wcpncpy, wcsncpy — copy a fixed-size wide-character string,
returning a pointer to its end
#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);
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
standard.
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.
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.
No errors are defined.
The following sections are informative.
None.
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
null-terminated.
None.
None.
strncpy(3p), wcscpy(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 WCSNCPY(3P)
Pages that refer to this page: wchar.h(0p), strncpy(3p), wcpncpy(3p), wcscpy(3p)
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HTML rendering created 2023-12-22 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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