wcscmp - compare two wide-character strings
int wcscmp(const wchar_t *s1, const wchar_t *s2);
The wcscmp() function is the wide-character equivalent of the
strcmp(3) function. It compares the wide-character string pointed to by
s1 and the wide-character string pointed to by s2.
The wcscmp() function returns zero if the wide-character strings at
s1 and s2 are equal. It returns an integer greater than zero if
at the first differing position i, the corresponding wide-character
s1[i] is greater than s2[i]. It returns an integer less than
zero if at the first differing position i, the corresponding
wide-character s1[i] is less than s2[i].
For an explanation of the terms used in this section, see attributes(7).
POSIX.1-2001, POSIX.1-2008, C99.
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