int fstrcasecmpi(const char *string1, const char *string2);
DESCRIPTION
The fstrcmp() function compares the two strings,
string1 and string2,
ignoring case.
RETURN VALUE
The fstrcasecmpi function returns an int value between
0 and FSTRCMPI_IDENTICAL. A value of 0 means the strings are
utterly un-alike. A value of FSTRCMPI_IDENTICAL means the 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.