WCSNCPY(3) manual page
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wcsncpy - copy a fixed-size string of wide characters
#include <wchar.h>
wchar_t *wcsncpy(wchar_t *dest, const wchar_t *src, size_t n);
The
wcsncpy() function is the wide-character equivalent of the strncpy(3)
function.
It copies at most n wide characters from the wide-character string pointed
to by src, including the terminating null wide character (Laq\0aq), to the
array pointed to by dest. Exactly n wide characters are written at dest.
If the length wcslen(src) is smaller than n, the remaining wide characters
in the array pointed to by dest are filled with null wide characters. If
the length wcslen(src) is greater than or equal to n, the string pointed
to by dest will not be terminated by a null wide character.
The strings
may not overlap.
The programmer must ensure that there is room for at least
n wide characters at dest.
wcsncpy() returns dest.
The wcsncpy() function is thread-safe.
C99.
strncpy(3)
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