wcschr - search a wide character in a wide-character string
wchar_t *wcschr(const wchar_t *wcs, wchar_t wc);
The wcschr() function is the wide-character equivalent of the
strchr(3) function. It searches the first occurrence of wc in
the wide-character string pointed to by wcs.
The wcschr() function returns a pointer to the first occurrence of
wc in the wide-character string pointed to by wcs, or NULL if
wc does not occur in the string.
For an explanation of the terms used in this section, see attributes(7).
POSIX.1-2001, POSIX.1-2008, C99.
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