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