|| actualOsName.contains("ce"));
            isNT = !is9x;
        }
        switch (family) {
            case FAMILY_WINDOWS:
                return isWindows;
            case FAMILY_WIN9X:
                return isWindows && is9x;
            case FAMILY_NT:
                return isWindows && isNT;
            case FAMILY_OS2:
                return actualOsName.contains(FAMILY_OS2);

	z.a.abs = z.a.abs.setBytes(buf[j:i])
	z.b.abs = z.b.abs.setBytes(buf[i:])
	return nil
}

// MarshalText implements the [encoding.TextMarshaler] interface.
func (x *Rat) MarshalText() (text []byte, err error) {
	if x.IsInt() {
		return x.a.MarshalText()
	}
	return x.marshal(), nil
}

// UnmarshalText implements the [encoding.TextUnmarshaler] interface.
func (z *Rat) UnmarshalText(text []byte) error {