wcscasecmp - compare two wide-character strings, ignoring case
The wcscasecmp() function returns zero if the wide-character strings at
s2 are equal except for case distinctions. It returns a positive integer if
s1 is greater than
s2, ignoring case. It returns a negative integer if
s1 is smaller than
s2, ignoring case.
POSIX.1-2008. This function is not specified in POSIX.1-2001, and is not widely available on other systems.
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