Fill an array of wide-characters with a constant wide character
#include <wchar.h> wchar_t *wmemset(wchar_t *wcs, wchar_t wc, size_t n);
The wmemset() function is the wide-character equivalent of the memset(3) function. It fills the array of n wide-characters starting at wcs with n copies of the wide character wc.
wmemset() returns wcs.
The wmemset() function is thread-safe.
C99.
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