wmemcpy
(void) wmemcpy(bp, oldbp, blen);
(void) wmemcpy(bp + blen, ss, sslen);
(void) wmemcpy(bp + blen + sslen, os, oslen);
extern wchar_t *wmemcpy(wchar_t *_RESTRICT_KYWD,
using std::wmemcpy;
(void) wmemcpy(dst + dstoff, src, nwcs);
(void) wmemcpy(dst, src, nwcs);
(void) wmemcpy((wchar_t *)*bufptr, p, len);
(void) wmemcpy((wchar_t *)*bufptr, p, n);
(void) wmemcpy(wbracket_str,
(void) wmemcpy(buf, test->wt_buf, ARRAY_SIZE(test->wt_buf));