Issue 829 C# port of Code 39 encoder

git-svn-id: https://zxing.googlecode.com/svn/trunk@1765 59b500cc-1b3d-0410-9834-0bbf25fbcc57

AUTHORS

@@ -22,6 +22,7 @@ David Olivier
 Diego Pierotto
 drejc83
 Eduardo Castillejo (University of Deusto)
+Emanuele Aina
 Eric Kobrin (Velocitude)
 Erik Barbara
 Fred Lin (Anobiit)

csharp/oned/Code39Reader.cs

@@ -32,7 +32,7 @@ namespace com.google.zxing.oned
 	public sealed class Code39Reader:OneDReader
 	{
 		
-		private const System.String ALPHABET_STRING = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. *$/+%";
+		internal const System.String ALPHABET_STRING = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. *$/+%";
 		//UPGRADE_NOTE: Final was removed from the declaration of 'ALPHABET '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
 		private static readonly char[] ALPHABET = ALPHABET_STRING.ToCharArray();
 		
@@ -41,7 +41,7 @@ namespace com.google.zxing.oned
 		/// with 1s representing "wide" and 0s representing narrow.
 		/// </summary>
 		//UPGRADE_NOTE: Final was removed from the declaration of 'CHARACTER_ENCODINGS'. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
-		private static readonly int[] CHARACTER_ENCODINGS = new int[]{0x034, 0x121, 0x061, 0x160, 0x031, 0x130, 0x070, 0x025, 0x124, 0x064, 0x109, 0x049, 0x148, 0x019, 0x118, 0x058, 0x00D, 0x10C, 0x04C, 0x01C, 0x103, 0x043, 0x142, 0x013, 0x112, 0x052, 0x007, 0x106, 0x046, 0x016, 0x181, 0x0C1, 0x1C0, 0x091, 0x190, 0x0D0, 0x085, 0x184, 0x0C4, 0x094, 0x0A8, 0x0A2, 0x08A, 0x02A};
+		internal static readonly int[] CHARACTER_ENCODINGS = new int[]{0x034, 0x121, 0x061, 0x160, 0x031, 0x130, 0x070, 0x025, 0x124, 0x064, 0x109, 0x049, 0x148, 0x019, 0x118, 0x058, 0x00D, 0x10C, 0x04C, 0x01C, 0x103, 0x043, 0x142, 0x013, 0x112, 0x052, 0x007, 0x106, 0x046, 0x016, 0x181, 0x0C1, 0x1C0, 0x091, 0x190, 0x0D0, 0x085, 0x184, 0x0C4, 0x094, 0x0A8, 0x0A2, 0x08A, 0x02A};
 		
 		//UPGRADE_NOTE: Final was removed from the declaration of 'ASTERISK_ENCODING '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
 		private static readonly int ASTERISK_ENCODING = CHARACTER_ENCODINGS[39];
@@ -389,4 +389,4 @@ namespace com.google.zxing.oned
 			return decoded.ToString();
 		}
 	}
-}
+}

csharp/oned/Code39Writer.cs

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2011 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+using System;
+using System.Collections;
+using BarcodeFormat = com.google.zxing.BarcodeFormat;
+using ReaderException = com.google.zxing.ReaderException;
+using Result = com.google.zxing.Result;
+using ResultPoint = com.google.zxing.ResultPoint;
+using ByteMatrix = com.google.zxing.common.ByteMatrix;
+namespace com.google.zxing.oned
+{
+    /// <summary> <p>Implements decoding of the EAN-13 format.</p>
+    ///
+    /// </summary>
+    /// <author>  erik.barbara@gmail.com (Erik Barbara)
+    /// </author>
+    /// <author>  em@nerd.ocracy.org (Emanuele Aina) - Ported from ZXING Java Source
+    /// </author>
+    public sealed class Code39Writer:UPCEANWriter
+    {
+      public override ByteMatrix encode(string contents, BarcodeFormat format, int width, int height, Hashtable hints)  {
+            if (format != BarcodeFormat.CODE_39) {
+                throw new ArgumentException("Can only encode CODE_39, but got " + format);
+            }
+            return base.encode(contents, format, width, height, hints);
+      }
+    
+      public override sbyte[] encode(string contents) {
+            int length = contents.Length;
+            if (length > 80) {
+                throw new ArgumentException("Requested contents should be less than 80 digits long, but got " + length);
+            }
+
+            int[] widths = new int[9];
+            int codeWidth = 24 + 1 + length;
+            for (int i = 0; i < length; i++) {
+                int indexInString = Code39Reader.ALPHABET_STRING.IndexOf(contents[i]);
+                toIntArray(Code39Reader.CHARACTER_ENCODINGS[indexInString], widths);
+                for(int j = 0; j < widths.Length; j++) {
+                    codeWidth += widths[j];
+                }
+            }
+            sbyte[] result = new sbyte[codeWidth];
+            toIntArray(Code39Reader.CHARACTER_ENCODINGS[39], widths);
+            int pos = appendPattern(result, 0, widths, 1);
+            int[] narrowWhite = {1};
+            pos += appendPattern(result, pos, narrowWhite, 0);
+            //append next character to bytematrix
+            for(int i = length-1; i >= 0; i--) {
+                int indexInString = Code39Reader.ALPHABET_STRING.IndexOf(contents[i]);
+                toIntArray(Code39Reader.CHARACTER_ENCODINGS[indexInString], widths);
+                pos += appendPattern(result, pos, widths, 1);
+                pos += appendPattern(result, pos, narrowWhite, 0);
+            }
+            toIntArray(Code39Reader.CHARACTER_ENCODINGS[39], widths);
+            pos += appendPattern(result, pos, widths, 1);
+            return result;
+        }
+
+        private static void toIntArray(int a, int[] toReturn) {
+            for (int i = 0; i < 9; i++) {
+                int temp = a & (1 << i);
+                toReturn[i] = (temp == 0) ? 1 : 2;
+            }
+        }
+    }
+}

csharp/zxing.csproj

@@ -232,6 +232,7 @@
     <Compile Include="SupportClass.cs" />
     <Compile Include="Writer.cs" />
     <Compile Include="WriterException.cs" />
+    <Compile Include="oned\Code39Writer.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
@@ -240,4 +241,4 @@
     <PostBuildEvent>
     </PostBuildEvent>
   </PropertyGroup>
-</Project>
+</Project>