private static void AddErrorCorrection(StringBuilder barPattern)
{
// Adds Reed-Solomon error correction.
int dataCodewords = 0;
byte[] eccBlocks = new byte[4];
byte[] dataBlocks = new byte[31];
// Build the triples data blocks;
for (int i = 0; i < barPattern.Length; i += 3, dataCodewords++)
{
dataBlocks[dataCodewords] = (byte)(ConvertPattern(barPattern[i], 4)
+ ConvertPattern(barPattern[i + 1], 2)
+ ConvertPattern(barPattern[i + 2], 0));
}
ReedSolomon.RSInitialise(0x43, 4, 1);
ReedSolomon.RSEncode(dataCodewords, dataBlocks, eccBlocks);
// Append error correction in reverse order.
for (int i = 4; i > 0; i--)
{
barPattern.Append(AusBarTable[(int)eccBlocks[i - 1]]);
}
}
private static void SecondaryDataCheckOdd(int eccLength, int[] maxiCodewords)
{
// Handles error correction of odd characters in secondary.
int dataLength = 68;
if (eccLength == 20)
{
dataLength = 84;
}
byte[] dataCodewords = new byte[dataLength];
byte[] eccCodewords = new byte[eccLength];
for (int j = 0; j < dataLength; j++)
{
if ((j & 1) != 0) // Odd
{
dataCodewords[(j - 1) / 2] = (byte)maxiCodewords[j + 20];
}
}
ReedSolomon.RSInitialise(0x43, eccLength, 1);
ReedSolomon.RSEncode(dataLength / 2, dataCodewords, eccCodewords);
for (int j = 0; j < eccLength; j++)
{
maxiCodewords[dataLength + (2 * j) + 1 + 20] = eccCodewords[eccLength - 1 - j];
}
}
private static void PrimaryDataCheck(int[] maxiCodewords)
{
// Handles error correction of primary barcodeMessage.
int dataLength = 10;
int eccLength = 10;
byte[] data = new byte[dataLength];
byte[] result = new byte[eccLength];
for (int j = 0; j < dataLength; j++)
data[j] = (byte)maxiCodewords[j];
ReedSolomon.RSInitialise(0x43, eccLength, 1);
ReedSolomon.RSEncode(dataLength, data, result);
for (int j = 0; j < eccLength; j++)
maxiCodewords[dataLength + j] = result[eccLength - 1 - j];
}
private void Mailmark()
{
int inputLength = barcodeData.Length;
char barcodeType = 'C';
int formatId = 0;
int versionId = 0;
int classId = 0;
int supplyChainId = 0;
int itemId = 0;
string postcode = String.Empty;
int postcodeType = 0;
string pattern = String.Empty;
short[] destinationPostcode = new short[112];
short[] aRegister = new short[112];
short[] bRegister = new short[112];
short[] tempRegister = new short[112];
short[] cdvRegister = new short[112];
byte[] data = new byte[26];
int dataTop, dataStep;
byte[] check = new byte[7];
short[] extender = new short[27];
int checkCount;
StringBuilder barPattern = new StringBuilder();
bool result;
if (inputLength > 26)
{
throw new InvalidDataLengthException("Mailmark: Input data too long.");
}
if (inputLength <= 22)
{
for (int i = inputLength; i < 22; i++)
{
barcodeData = ArrayExtensions.Insert(barcodeData, inputLength, ' ');
}
inputLength = barcodeData.Length;
barcodeType = 'C';
}
if (inputLength > 22 && inputLength <= 26)
{
for (int i = inputLength; i < 26; i++)
{
barcodeData = ArrayExtensions.Insert(barcodeData, inputLength, ' ');
}
inputLength = barcodeData.Length;
barcodeType = 'L';
}
for (int i = 0; i < inputLength; i++)
{
barcodeData[i] = Char.ToUpper(barcodeData[i], CultureInfo.CurrentCulture); // Make sure all characters are uppercase.
if (CharacterSets.Mailmark.IndexOf(barcodeData[i]) == -1)
{
throw new InvalidDataException("Mailmark: Invalid character in input data.");
}
}
// Format is in the range 0-4.
result = int.TryParse((new string(barcodeData, 0, 1)), out formatId);
if (!result || formatId < 0 || formatId > 4)
{
throw new InvalidDataException("Mailmark: Invalid Format character in input data.");
}
// Version ID is in the range 1-4.
result = int.TryParse((new string(barcodeData, 1, 1)), out versionId);
versionId--; // Internal field value of 0-3.
if (!result || versionId < 0 || versionId > 3)
{
throw new InvalidDataException("Mailmark: Invalid Version ID character in input data.");
}
// Class is in the range 0-9 & A-E.
result = int.TryParse((new string(barcodeData, 2, 1)), NumberStyles.HexNumber, null, out classId);
if (!result || classId < 0 || classId > 14)
{
throw new InvalidDataException("Mailmark: Invalid Class ID character in input data.");
}
// Supply Chain ID is 2 digits for barcode C and 6 digits for barcode L
int supplyChainLength = (barcodeType == 'C') ? 2 : 6;
result = int.TryParse(new string(barcodeData, 3, supplyChainLength), out supplyChainId);
if (!result)
{
throw new InvalidDataException("Mailmark: Invalid Supply Chain ID character in input data.");
}
// Item ID is 8 digits.
result = int.TryParse(new string(barcodeData, 3 + supplyChainLength, 8), out itemId);
if (!result)
{
throw new InvalidDataException("Mailmark: Invalid Item ID character in input data.");
}
// Seperate Destination Post Code plus DPS field.
postcode = new string(barcodeData, 3 + supplyChainLength + 8, 9);
// Detect postcode type
/* Postcode type is used to select which format of postcode
*
* 1 = FNFNLLNLS
* 2 = FFNNLLNLS
* 3 = FFNNNLLNL
* 4 = FFNFNLLNL
* 5 = FNNLLNLSS
* 6 = FNNNLLNLS
* 7 = International designation*/
if (postcode == "XY11 ")
{
postcodeType = 7;
}
else
{
if (postcode[7] == ' ')
{
postcodeType = 5;
}
else
{
if (postcode[8] == ' ')
{
// Types 1, 2 and 6
if (Char.IsDigit(postcode[1]))
{
if (Char.IsDigit(postcode[2]))
{
postcodeType = 6;
}
else
{
postcodeType = 1;
}
}
else
{
postcodeType = 2;
}
}
else
{
// Types 3 and 4
if (Char.IsDigit(postcode[3]))
{
postcodeType = 3;
}
else
{
postcodeType = 4;
}
}
}
}
// Verify postcode type
if (postcodeType != 7)
{
if (!VerifyPostcode(postcode, postcodeType))
{
throw new InvalidDataException("Mailmark: Invalid Postcode in input data.");
}
}
// Convert postcode to internal user field.
if (postcodeType != 7)
{
pattern = postcodeFormat[postcodeType - 1];
BinaryMath.BinaryLoad(bRegister, "0");
for (int i = 0; i < 9; i++)
{
switch (pattern[i])
{
case 'F':
BinaryMath.BinaryMultiply(bRegister, "26");
BinaryMath.BinaryLoad(tempRegister, "0");
for (int j = 0; j < 5; j++)
{
if ((SetF.IndexOf(postcode[i]) & (0x01 << j)) > 0)
{
tempRegister[j] = 1;
}
}
BinaryMath.BinaryAdd(bRegister, tempRegister);
break;
case 'L':
BinaryMath.BinaryMultiply(bRegister, "20");
BinaryMath.BinaryLoad(tempRegister, "0");
for (int j = 0; j < 5; j++)
{
if ((SetL.IndexOf(postcode[i]) & (0x01 << j)) > 0)
{
tempRegister[j] = 1;
}
}
BinaryMath.BinaryAdd(bRegister, tempRegister);
break;
case 'N':
BinaryMath.BinaryMultiply(bRegister, "10");
BinaryMath.BinaryLoad(tempRegister, "0");
for (int j = 0; j < 5; j++)
{
if ((SetN.IndexOf(postcode[i]) & (0x01 << j)) > 0)
{
tempRegister[j] = 1;
}
}
BinaryMath.BinaryAdd(bRegister, tempRegister);
break;
}
}
// Destination postcode = accumulatorA + accumulatorB.
BinaryMath.BinaryLoad(destinationPostcode, "0");
BinaryMath.BinaryAdd(destinationPostcode, bRegister);
BinaryMath.BinaryLoad(aRegister, "1");
if (postcodeType == 1)
{
BinaryMath.BinaryAdd(destinationPostcode, aRegister);
}
BinaryMath.BinaryLoad(tempRegister, "5408000000");
BinaryMath.BinaryAdd(aRegister, tempRegister);
if (postcodeType == 2)
{
BinaryMath.BinaryAdd(destinationPostcode, aRegister);
}
BinaryMath.BinaryLoad(tempRegister, "5408000000");
BinaryMath.BinaryAdd(aRegister, tempRegister);
if (postcodeType == 3)
{
BinaryMath.BinaryAdd(destinationPostcode, aRegister);
}
BinaryMath.BinaryLoad(tempRegister, "54080000000");
BinaryMath.BinaryAdd(aRegister, tempRegister);
if (postcodeType == 4)
{
BinaryMath.BinaryAdd(destinationPostcode, aRegister);
}
BinaryMath.BinaryLoad(tempRegister, "140608000000");
BinaryMath.BinaryAdd(aRegister, tempRegister);
if (postcodeType == 5)
{
BinaryMath.BinaryAdd(destinationPostcode, aRegister);
}
BinaryMath.BinaryLoad(tempRegister, "208000000");
BinaryMath.BinaryAdd(aRegister, tempRegister);
if (postcodeType == 6)
{
BinaryMath.BinaryAdd(destinationPostcode, aRegister);
}
}
// Conversion from Internal User Fields to Consolidated Data Value
// Set CDV to 0
BinaryMath.BinaryLoad(cdvRegister, "0");
// Add Destination Post Code plus DPS
BinaryMath.BinaryAdd(cdvRegister, destinationPostcode);
// Multiply by 100,000,000
BinaryMath.BinaryMultiply(cdvRegister, "100000000");
// Add Item ID
BinaryMath.BinaryLoad(tempRegister, "0");
for (int i = 0; i < 32; i++)
{
if ((0x01 & (itemId >> i)) > 0)
{
tempRegister[i] = 1;
}
}
BinaryMath.BinaryAdd(cdvRegister, tempRegister);
if (barcodeType == 'C')
{
BinaryMath.BinaryMultiply(cdvRegister, "100"); // Barcode C - Multiply by 100
}
else
{
BinaryMath.BinaryMultiply(cdvRegister, "1000000"); // Barcode L - Multiply by 1,000,000
}
// Add Supply Chain ID
//int scCount = barcodeType == 'C' ? 7 : 20;
BinaryMath.BinaryLoad(tempRegister, "0");
for (int i = 0; i < 20; i++)
{
if ((0x01 & (supplyChainId >> i)) > 0)
{
tempRegister[i] = 1;
}
}
BinaryMath.BinaryAdd(cdvRegister, tempRegister);
// Multiply by 15
BinaryMath.BinaryMultiply(cdvRegister, "15");
// Add Class
BinaryMath.BinaryLoad(tempRegister, "0");
for (int i = 0; i < 4; i++)
{
if ((0x01 & (classId >> i)) > 0)
{
tempRegister[i] = 1;
}
}
BinaryMath.BinaryAdd(cdvRegister, tempRegister);
// Multiply by 5
BinaryMath.BinaryMultiply(cdvRegister, "5");
// Add Format
BinaryMath.BinaryLoad(tempRegister, "0");
for (int i = 0; i < 4; i++)
{
if ((0x01 & (formatId >> i)) > 0)
{
tempRegister[i] = 1;
}
}
BinaryMath.BinaryAdd(cdvRegister, tempRegister);
// Multiply by 4
BinaryMath.BinaryMultiply(cdvRegister, "4");
// Add Version ID
BinaryMath.BinaryLoad(tempRegister, "0");
for (int i = 0; i < 4; i++)
{
if ((0x01 & (versionId >> i)) > 0)
{
tempRegister[i] = 1;
}
}
BinaryMath.BinaryAdd(cdvRegister, tempRegister);
if (barcodeType == 'C')
{
dataTop = 15;
dataStep = 8;
checkCount = 6;
}
else
{
dataTop = 18;
dataStep = 10;
checkCount = 7;
}
// Conversion from Consolidated Data Value to Data Numbers
for (int i = 0; i < 112; i++)
{
bRegister[i] = cdvRegister[i];
}
for (int j = dataTop; j >= (dataStep + 1); j--)
{
for (int i = 0; i < 112; i++)
{
cdvRegister[i] = bRegister[i];
bRegister[i] = 0;
aRegister[i] = 0;
}
aRegister[96] = 1;
for (int i = 91; i >= 0; i--)
{
bRegister[i] = BinaryMath.IsLarger(cdvRegister, aRegister);
if (bRegister[i] == 1)
{
BinaryMath.BinarySubtract(cdvRegister, aRegister);
}
BinaryMath.ShiftDown(aRegister);
}
data[j] = (byte)((cdvRegister[5] * 32) + (cdvRegister[4] * 16) + (cdvRegister[3] * 8) + (cdvRegister[2] * 4) + (cdvRegister[1] * 2) + cdvRegister[0]);
}
for (int j = dataStep; j >= 0; j--)
{
for (int i = 0; i < 112; i++)
{
cdvRegister[i] = bRegister[i];
bRegister[i] = 0;
aRegister[i] = 0;
}
aRegister[95] = 1;
aRegister[94] = 1;
aRegister[93] = 1;
aRegister[92] = 1;
for (int i = 91; i >= 0; i--)
{
bRegister[i] = BinaryMath.IsLarger(cdvRegister, aRegister);
if (bRegister[i] == 1)
{
BinaryMath.BinarySubtract(cdvRegister, aRegister);
}
BinaryMath.ShiftDown(aRegister);
}
data[j] = (byte)((cdvRegister[5] * 32) + (cdvRegister[4] * 16) + (cdvRegister[3] * 8) + (cdvRegister[2] * 4) + (cdvRegister[1] * 2) + cdvRegister[0]);
}
ReedSolomon.RSInitialise(0x25, checkCount, 1);
ReedSolomon.RSEncode(dataTop + 1, data, check);
// Append check digits to data.
for (int i = 1; i <= checkCount; i++)
{
data[dataTop + i] = check[checkCount - i];
}
// Conversion from Data Numbers and Check Numbers to Data Symbols and Check Symbols
for (int i = 0; i <= dataStep; i++)
{
data[i] = dataSymbolEven[data[i]];
}
for (int i = dataStep + 1; i <= (dataTop + checkCount); i++)
{
data[i] = dataSymbolOdd[data[i]];
}
// Conversion from Data Symbols and Check Symbols to Extender Groups
for (int i = 0; i < inputLength; i++)
{
if (barcodeType == 'C')
{
extender[extenderGroupC[i]] = data[i];
}
else
{
extender[extenderGroupL[i]] = data[i];
}
}
// Conversion from Extender Groups to Bar Identifiers
for (int i = 0; i < inputLength; i++)
{
for (int j = 0; j < 3; j++)
{
switch (extender[i] & 0x24)
{
case 0x24:
barPattern.Append("F");
break;
case 0x20:
if (i % 2 > 0)
{
barPattern.Append("D");
}
else
{
barPattern.Append("A");
}
break;
case 0x04:
if (i % 2 > 0)
{
barPattern.Append("A");
}
else
{
barPattern.Append("D");
}
break;
default:
barPattern.Append("T");
break;
}
extender[i] = (short)(extender[i] << 1);
}
}
BuildSymbol(barPattern);
barcodeText = new string(barcodeData);
}