размер строки широких символов, возвращающей указатель на ее конец (size wide-character string, returning a pointer to its end)
Пролог (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.
Имя (Name)
wcpncpy, wcsncpy — copy a fixed-size wide-character string,
returning a pointer to its end
Синопсис (Synopsis)
#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);
Описание (Description)
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.
Возвращаемое значение (Return value)
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.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
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.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
strncpy(3p), wcscpy(3p)
The Base Definitions volume of POSIX.1‐2017, wchar.h(0p)
