func (a *adler32Hash) Reset() {
a.adler = C.adler32(0, (*C.Bytef)(unsafe.Pointer(nil)), 0)
}
// io.Writer interface
func (a *adler32Hash) Write(p []byte) (n int, err error) {
if len(p) > 0 {
a.adler = C.adler32(a.adler, (*C.Bytef)(unsafe.Pointer(&p[0])), (C.uInt)(len(p)))
}
return len(p), nil
}