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71 lines
2.2 KiB
C#
71 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace BarcodeLib.Symbologies
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{
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/// <summary>
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/// UPC Supplement-2 encoding
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/// Written by: Brad Barnhill
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/// </summary>
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class UPCSupplement2 : BarcodeCommon, IBarcode
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{
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private string [] EAN_CodeA = { "0001101", "0011001", "0010011", "0111101", "0100011", "0110001", "0101111", "0111011", "0110111", "0001011" };
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private string [] EAN_CodeB = { "0100111", "0110011", "0011011", "0100001", "0011101", "0111001", "0000101", "0010001", "0001001", "0010111" };
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private string[] UPC_SUPP_2 = { "aa", "ab", "ba", "bb" };
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public UPCSupplement2(string input)
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{
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Raw_Data = input;
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}
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/// <summary>
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/// Encode the raw data using the UPC Supplemental 2-digit algorithm.
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/// </summary>
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private string Encode_UPCSupplemental_2()
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{
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if (Raw_Data.Length != 2) Error("EUPC-SUP2-1: Invalid data length. (Length = 2 required)");
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if (!CheckNumericOnly(Raw_Data))
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Error("EUPC-SUP2-2: Numeric Data Only");
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string pattern = "";
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try
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{
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pattern = this.UPC_SUPP_2[Int32.Parse(Raw_Data.Trim()) % 4];
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}//try
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catch { Error("EUPC-SUP2-3: Invalid Data. (Numeric only)"); }
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string result = "1011";
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int pos = 0;
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foreach (char c in pattern)
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{
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if (c == 'a')
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{
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//encode using odd parity
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result += EAN_CodeA[Int32.Parse(Raw_Data[pos].ToString())];
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}//if
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else if (c == 'b')
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{
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//encode using even parity
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result += EAN_CodeB[Int32.Parse(Raw_Data[pos].ToString())];
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}//else if
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if (pos++ == 0) result += "01"; //Inter-character separator
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}//foreach
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return result;
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}//Encode_UPSSupplemental_2
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#region IBarcode Members
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public string Encoded_Value
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{
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get { return Encode_UPCSupplemental_2(); }
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}
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#endregion
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}//class
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}//namespace
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