public void ProperlyCorrectsErrorInAMessage2() { var reedSolomon = new ReedSolomon(); var data = new int[223]; for (var i = 0; i < 223; i++) { data[i] = i + 10; } var modifiedData = reedSolomon.EncodeRawBytesArray(data); modifiedData[12] += 87; var simpleDecoder = new SimpleRSDecoder(GenericGF.DATA_MATRIX_FIELD_256); var response = simpleDecoder.Decode(modifiedData, 32); Assert.IsTrue(response); for (var i = 0; i < 223; i++) { Assert.AreEqual(data[i], modifiedData[i]); } }
public void ProperlyCorrectsErrorInAMessageLoop() { var random = new Random(1); for (var j = 0; j < 10;) { var reedSolomon = new ReedSolomon(); var data = new int[223]; for (var i = 0; i < 223; i++) { data[i] = random.Next(1, 255); } var modifiedData = reedSolomon.EncodeRawBytesArray(data); var modifIndex = random.Next(255); modifiedData[modifIndex] = random.Next(255); var simpleDecoder = new SimpleRSDecoder(GenericGF.DATA_MATRIX_FIELD_256); var response = simpleDecoder.Decode(modifiedData, 32); if (response) { j++; for (var i = 0; i < 223; i++) { Assert.AreEqual(data[i], modifiedData[i]); } } } }
public void LongDivideProperlyCorrectsErrorInAMessage4() { var reedSolomon = new ReedSolomon(); var data = new int[223]; for (var i = 0; i < 223; i++) { data[i] = ((i + 50) % 255) + 1; } var modifiedData = reedSolomon.EncodeRawBytesArray(data); modifiedData[0] = 1; modifiedData[15] = 16; var simpleDecoder = new SimpleRSDecoder(GenericGF.DATA_MATRIX_FIELD_256); var response = simpleDecoder.LongDecode(modifiedData, 32); Assert.IsTrue(response); for (var i = 0; i < 223; i++) { Assert.AreEqual(data[i], modifiedData[i]); } }
public ReedSolomon(GenericGF galoisField, int correctionBytes) { _messageLength = galoisField.Size - 1; _correctionLength = correctionBytes; _informationLength = _messageLength - _correctionLength; _reedSolomonEncoder = new ReedSolomonEncoder(galoisField); _reedSolomonDecoder = new ReedSolomonDecoder(galoisField); _simpleRsDecoder = new SimpleRSDecoder(); }
public ReedSolomon(int correctionBytes) { var galoisField = GenericGF.DATA_MATRIX_FIELD_256; _messageLength = galoisField.Size - 1; _correctionLength = correctionBytes; _informationLength = _messageLength - _correctionLength; _reedSolomonEncoder = new ReedSolomonEncoder(galoisField); _reedSolomonDecoder = new ReedSolomonDecoder(galoisField); _simpleRsDecoder = new SimpleRSDecoder(); }
public void ProperlyCorrects2ErrorsInAMessageLoop() { var random = new Random(1); for (var j = 0; j < 5;) { var reedSolomon = new ReedSolomon(); var data = new int[223]; for (var i = 0; i < 223; i++) { data[i] = random.Next(1, 255); } var modifiedData = reedSolomon.EncodeRawBytesArray(data); var modifIndex = random.Next(255); var modifValue = random.Next(255); while (modifValue == modifiedData[modifIndex]) { modifValue = random.Next(255); } modifiedData[modifIndex] = modifValue; var modifIndex2 = random.Next(255); var modifValue2 = random.Next(255); while (modifIndex == modifIndex2) { modifIndex2 = random.Next(255); } while (modifValue2 == modifiedData[modifIndex2]) { modifValue2 = random.Next(255); } modifiedData[modifIndex2] = modifValue2; var simpleDecoder = new SimpleRSDecoder(GenericGF.DATA_MATRIX_FIELD_256); var response = simpleDecoder.Decode(modifiedData, 32); var bytesDiffCount = GetDiffTable(data, modifiedData, 223); Assert.IsTrue(bytesDiffCount.Count <= 2); if (response) { j++; for (var i = 0; i < 223; i++) { Assert.AreEqual(data[i], modifiedData[i]); } } } }
public void ProperlyCorrectsUpto16ErrorsInAMessageLoop() { var random = new Random(1); for (var j = 0; j < 17; j++) { var reedSolomon = new ReedSolomon(); var data = new int[223]; for (var i = 0; i < 223; i++) { data[i] = random.Next(255); } var modifiedData = reedSolomon.EncodeRawBytesArray(data); var errorCount = 0; var startIndex = random.Next(0, 255 - 16); for (var k = startIndex; k < startIndex + j; k++) { var modifValue = random.Next(255); while (modifValue == modifiedData[k]) { modifValue = random.Next(255); } modifiedData[k] = modifValue; errorCount++; } var simpleDecoder = new SimpleRSDecoder(GenericGF.DATA_MATRIX_FIELD_256); var response = simpleDecoder.Decode(modifiedData, 32); var bytesDiffCount = GetDiffTable(data, modifiedData, 223); Assert.IsTrue(bytesDiffCount.Count <= errorCount); for (var i = 0; i < 223; i++) { Assert.AreEqual(data[i], modifiedData[i]); } } }
public void ProperlyNotCorrectsErrorInAMessage5() { var reedSolomon = new ReedSolomon(); var data = new int[223]; for (var i = 0; i < 223; i++) { data[i] = ((i + 50) % 255) + 1; } var modifiedData = reedSolomon.EncodeRawBytesArray(data); modifiedData[0] = 0; modifiedData[170] = 170; var simpleDecoder = new SimpleRSDecoder(GenericGF.DATA_MATRIX_FIELD_256); var response = simpleDecoder.Decode(modifiedData, 32); Assert.IsFalse(response); }
public void ProperlyFindsErrorInAMessage() { var reedSolomon = new ReedSolomon(32); var data = new int[223]; for (var i = 0; i < 223; i++) { data[i] = i + 10; } var modifiedData = reedSolomon.EncodeRawBytesArray(data); for (var i = 10; i < 30; i++) { modifiedData[i] = i + 5; } var simpleDecoder = new SimpleRSDecoder(); var response = simpleDecoder.Decode(modifiedData, 32); Assert.IsFalse(response); }
public void ProperlyDecodesNoErrorMessage() { var reedSolomon = new ReedSolomon(32); var data = new int[223]; for (var i = 0; i < 223; i++) { data[i] = i + 10; } var modifiedData = reedSolomon.EncodeRawBytesArray(data); var simpleDecoder = new SimpleRSDecoder(); var response = simpleDecoder.Decode(modifiedData, 32); Assert.IsTrue(response); for (var i = 0; i < 223; i++) { Assert.AreEqual(data[i], modifiedData[i]); } }