iTextSharp.text.Jpeg.MarkerType C# (CSharp) Метод

        private static int MarkerType(int marker)
        {
            for (int i = 0; i < VALID_MARKERS.Length; i++) {
                if (marker == VALID_MARKERS[i]) {
                    return VALID_MARKER;
                }
            }
            for (int i = 0; i < NOPARAM_MARKERS.Length; i++) {
                if (marker == NOPARAM_MARKERS[i]) {
                    return NOPARAM_MARKER;
                }
            }
            for (int i = 0; i < UNSUPPORTED_MARKERS.Length; i++) {
                if (marker == UNSUPPORTED_MARKERS[i]) {
                    return UNSUPPORTED_MARKER;
                }
            }
            return NOT_A_MARKER;
        }