pub unsafe fn GetFilePatchSignatureByBuffer(
    filebufferwritable: &mut [u8],
    optionflags: u32,
    optiondata: Option<*const c_void>,
    ignorerangearray: Option<&[PATCH_IGNORE_RANGE]>,
    retainrangearray: Option<&[PATCH_RETAIN_RANGE]>,
    signaturebuffer: &mut [u8]
) -> BOOL