wmemchr - search a wide character in a wide-character array
wchar_t *wmemchr(const wchar_t *s, wchar_t c, size_t n);
The wmemchr() function is the wide-character equivalent of the memchr(3) function. It searches the n wide characters starting at s for the first occurrence of the wide character c.
The wmemchr() function returns a pointer to the first occurrence of c among the n wide characters starting at s, or NULL if c does not occur among these.
For an explanation of the terms used in this section, see attributes(7).
POSIX.1-2001, POSIX.1-2008, C99.
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