int fwcscmpi(const wchar_t *string1, const wchar_t *string2);
DESCRIPTION
The fwcscmpi() function compares the two wide-character strings,
string1 and string2.
RETURN VALUE
The fwcscmpi function returns an int value between 0
and FSTRCMPI_IDENTICAL. A value of 0 means the two wide-character
strings are utterly un-alike. A value of FSTRCMPI_IDENTICAL means
the two wide-character strings are identical. A value of more than
FSTRCMPI_THRESHOLD (it lies between 0 and FSTRCMPI_IDENTICAL) would be
considered "similar" by most people.
A value of FSTRCMPI_ERROR (always negative) indicates a malloc(3)
failure.
The comparison code is derived from the fuzzy comparison functions in
GNU Gettext 0.17. The GNU Gettext comparison functions were, in turn,
derived from GNU Diff 2.7.