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277 lines
12 KiB
C#
277 lines
12 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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/// Code 39 encoding
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/// Written by: Brad Barnhill
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/// </summary>
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class Code39 : BarcodeCommon, IBarcode
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{
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private System.Collections.Hashtable C39_Code = new System.Collections.Hashtable(); //is initialized by init_Code39()
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private System.Collections.Hashtable ExtC39_Translation = new System.Collections.Hashtable();
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private bool _AllowExtended = false;
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private bool _EnableChecksum = false;
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/// <summary>
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/// Encodes with Code39.
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/// </summary>
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/// <param name="input">Data to encode.</param>
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public Code39(string input)
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{
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Raw_Data = input;
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}//Code39
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/// <summary>
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/// Encodes with Code39.
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/// </summary>
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/// <param name="input">Data to encode.</param>
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/// <param name="AllowExtended">Allow Extended Code 39 (Full Ascii mode).</param>
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public Code39(string input, bool AllowExtended)
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{
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Raw_Data = input;
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_AllowExtended = AllowExtended;
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}
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/// <summary>
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/// Encodes with Code39.
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/// </summary>
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/// <param name="input">Data to encode.</param>
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/// <param name="AllowExtended">Allow Extended Code 39 (Full Ascii mode).</param>
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/// <param name="EnableChecksum">Whether to calculate the Mod 43 checksum and encode it into the barcode</param>
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public Code39(string input, bool AllowExtended, bool EnableChecksum)
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{
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Raw_Data = input;
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_AllowExtended = AllowExtended;
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_EnableChecksum = EnableChecksum;
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}
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/// <summary>
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/// Encode the raw data using the Code 39 algorithm.
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/// </summary>
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private string Encode_Code39()
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{
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this.init_Code39();
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this.init_ExtendedCode39();
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string strNoAstr = Raw_Data.Replace("*", "");
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string strFormattedData = "*" + strNoAstr + (_EnableChecksum ? getChecksumChar(strNoAstr).ToString() : String.Empty) + "*";
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if (_AllowExtended)
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InsertExtendedCharsIfNeeded(ref strFormattedData);
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string result = "";
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//foreach (char c in this.FormattedData)
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foreach (char c in strFormattedData)
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{
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try
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{
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result += C39_Code[c].ToString();
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result += "0";//whitespace
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}//try
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catch
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{
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if (_AllowExtended)
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Error("EC39-1: Invalid data.");
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else
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Error("EC39-1: Invalid data. (Try using Extended Code39)");
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}//catch
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}//foreach
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result = result.Substring(0, result.Length-1);
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//clear the hashtable so it no longer takes up memory
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this.C39_Code.Clear();
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return result;
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}//Encode_Code39
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private void init_Code39()
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{
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C39_Code.Clear();
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C39_Code.Add('0', "101001101101");
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C39_Code.Add('1', "110100101011");
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C39_Code.Add('2', "101100101011");
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C39_Code.Add('3', "110110010101");
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C39_Code.Add('4', "101001101011");
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C39_Code.Add('5', "110100110101");
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C39_Code.Add('6', "101100110101");
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C39_Code.Add('7', "101001011011");
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C39_Code.Add('8', "110100101101");
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C39_Code.Add('9', "101100101101");
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C39_Code.Add('A', "110101001011");
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C39_Code.Add('B', "101101001011");
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C39_Code.Add('C', "110110100101");
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C39_Code.Add('D', "101011001011");
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C39_Code.Add('E', "110101100101");
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C39_Code.Add('F', "101101100101");
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C39_Code.Add('G', "101010011011");
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C39_Code.Add('H', "110101001101");
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C39_Code.Add('I', "101101001101");
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C39_Code.Add('J', "101011001101");
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C39_Code.Add('K', "110101010011");
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C39_Code.Add('L', "101101010011");
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C39_Code.Add('M', "110110101001");
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C39_Code.Add('N', "101011010011");
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C39_Code.Add('O', "110101101001");
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C39_Code.Add('P', "101101101001");
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C39_Code.Add('Q', "101010110011");
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C39_Code.Add('R', "110101011001");
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C39_Code.Add('S', "101101011001");
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C39_Code.Add('T', "101011011001");
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C39_Code.Add('U', "110010101011");
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C39_Code.Add('V', "100110101011");
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C39_Code.Add('W', "110011010101");
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C39_Code.Add('X', "100101101011");
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C39_Code.Add('Y', "110010110101");
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C39_Code.Add('Z', "100110110101");
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C39_Code.Add('-', "100101011011");
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C39_Code.Add('.', "110010101101");
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C39_Code.Add(' ', "100110101101");
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C39_Code.Add('$', "100100100101");
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C39_Code.Add('/', "100100101001");
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C39_Code.Add('+', "100101001001");
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C39_Code.Add('%', "101001001001");
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C39_Code.Add('*', "100101101101");
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}//init_Code39
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private void init_ExtendedCode39()
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{
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ExtC39_Translation.Clear();
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ExtC39_Translation.Add(Convert.ToChar(0).ToString(), "%U");
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ExtC39_Translation.Add(Convert.ToChar(1).ToString(), "$A");
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ExtC39_Translation.Add(Convert.ToChar(2).ToString(), "$B");
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ExtC39_Translation.Add(Convert.ToChar(3).ToString(), "$C");
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ExtC39_Translation.Add(Convert.ToChar(4).ToString(), "$D");
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ExtC39_Translation.Add(Convert.ToChar(5).ToString(), "$E");
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ExtC39_Translation.Add(Convert.ToChar(6).ToString(), "$F");
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ExtC39_Translation.Add(Convert.ToChar(7).ToString(), "$G");
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ExtC39_Translation.Add(Convert.ToChar(8).ToString(), "$H");
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ExtC39_Translation.Add(Convert.ToChar(9).ToString(), "$I");
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ExtC39_Translation.Add(Convert.ToChar(10).ToString(), "$J");
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ExtC39_Translation.Add(Convert.ToChar(11).ToString(), "$K");
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ExtC39_Translation.Add(Convert.ToChar(12).ToString(), "$L");
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ExtC39_Translation.Add(Convert.ToChar(13).ToString(), "$M");
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ExtC39_Translation.Add(Convert.ToChar(14).ToString(), "$N");
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ExtC39_Translation.Add(Convert.ToChar(15).ToString(), "$O");
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ExtC39_Translation.Add(Convert.ToChar(16).ToString(), "$P");
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ExtC39_Translation.Add(Convert.ToChar(17).ToString(), "$Q");
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ExtC39_Translation.Add(Convert.ToChar(18).ToString(), "$R");
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ExtC39_Translation.Add(Convert.ToChar(19).ToString(), "$S");
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ExtC39_Translation.Add(Convert.ToChar(20).ToString(), "$T");
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ExtC39_Translation.Add(Convert.ToChar(21).ToString(), "$U");
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ExtC39_Translation.Add(Convert.ToChar(22).ToString(), "$V");
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ExtC39_Translation.Add(Convert.ToChar(23).ToString(), "$W");
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ExtC39_Translation.Add(Convert.ToChar(24).ToString(), "$X");
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ExtC39_Translation.Add(Convert.ToChar(25).ToString(), "$Y");
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ExtC39_Translation.Add(Convert.ToChar(26).ToString(), "$Z");
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ExtC39_Translation.Add(Convert.ToChar(27).ToString(), "%A");
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ExtC39_Translation.Add(Convert.ToChar(28).ToString(), "%B");
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ExtC39_Translation.Add(Convert.ToChar(29).ToString(), "%C");
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ExtC39_Translation.Add(Convert.ToChar(30).ToString(), "%D");
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ExtC39_Translation.Add(Convert.ToChar(31).ToString(), "%E");
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ExtC39_Translation.Add("!", "/A");
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ExtC39_Translation.Add("\"", "/B");
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ExtC39_Translation.Add("#", "/C");
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ExtC39_Translation.Add("$", "/D");
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ExtC39_Translation.Add("%", "/E");
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ExtC39_Translation.Add("&", "/F");
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ExtC39_Translation.Add("'", "/G");
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ExtC39_Translation.Add("(", "/H");
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ExtC39_Translation.Add(")", "/I");
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ExtC39_Translation.Add("*", "/J");
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ExtC39_Translation.Add("+", "/K");
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ExtC39_Translation.Add(",", "/L");
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ExtC39_Translation.Add("/", "/O");
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ExtC39_Translation.Add(":", "/Z");
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ExtC39_Translation.Add(";", "%F");
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ExtC39_Translation.Add("<", "%G");
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ExtC39_Translation.Add("=", "%H");
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ExtC39_Translation.Add(">", "%I");
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ExtC39_Translation.Add("?", "%J");
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ExtC39_Translation.Add("[", "%K");
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ExtC39_Translation.Add("\\", "%L");
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ExtC39_Translation.Add("]", "%M");
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ExtC39_Translation.Add("^", "%N");
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ExtC39_Translation.Add("_", "%O");
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ExtC39_Translation.Add("{", "%P");
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ExtC39_Translation.Add("|", "%Q");
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ExtC39_Translation.Add("}", "%R");
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ExtC39_Translation.Add("~", "%S");
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ExtC39_Translation.Add("`", "%W");
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ExtC39_Translation.Add("@", "%V");
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ExtC39_Translation.Add("a", "+A");
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ExtC39_Translation.Add("b", "+B");
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ExtC39_Translation.Add("c", "+C");
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ExtC39_Translation.Add("d", "+D");
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ExtC39_Translation.Add("e", "+E");
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ExtC39_Translation.Add("f", "+F");
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ExtC39_Translation.Add("g", "+G");
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ExtC39_Translation.Add("h", "+H");
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ExtC39_Translation.Add("i", "+I");
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ExtC39_Translation.Add("j", "+J");
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ExtC39_Translation.Add("k", "+K");
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ExtC39_Translation.Add("l", "+L");
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ExtC39_Translation.Add("m", "+M");
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ExtC39_Translation.Add("n", "+N");
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ExtC39_Translation.Add("o", "+O");
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ExtC39_Translation.Add("p", "+P");
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ExtC39_Translation.Add("q", "+Q");
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ExtC39_Translation.Add("r", "+R");
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ExtC39_Translation.Add("s", "+S");
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ExtC39_Translation.Add("t", "+T");
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ExtC39_Translation.Add("u", "+U");
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ExtC39_Translation.Add("v", "+V");
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ExtC39_Translation.Add("w", "+W");
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ExtC39_Translation.Add("x", "+X");
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ExtC39_Translation.Add("y", "+Y");
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ExtC39_Translation.Add("z", "+Z");
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ExtC39_Translation.Add(Convert.ToChar(127).ToString(), "%T"); //also %X, %Y, %Z
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}
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private void InsertExtendedCharsIfNeeded(ref string FormattedData)
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{
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string output = "";
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foreach (char c in FormattedData)
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{
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try
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{
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string s = C39_Code[c].ToString();
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output += c;
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}//try
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catch
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{
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//insert extended substitution
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object oTrans = ExtC39_Translation[c.ToString()];
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output += oTrans.ToString();
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}//catch
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}//foreach
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FormattedData = output;
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}
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private char getChecksumChar(string strNoAstr)
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{
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//checksum
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string Code39_Charset = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%";
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InsertExtendedCharsIfNeeded(ref strNoAstr);
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int sum = 0;
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//Calculate the checksum
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for (int i = 0; i < strNoAstr.Length; ++i)
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{
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sum = sum + Code39_Charset.IndexOf(strNoAstr[i].ToString());
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}
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//return the checksum char
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return Code39_Charset[sum % 43];
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}
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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_Code39(); }
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}
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#endregion
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}//class
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}//namespace
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