-/*\r
+/*\r
+* Copyright 2008 ZXing authors\r
+*\r
* Licensed under the Apache License, Version 2.0 (the "License");\r
* you may not use this file except in compliance with the License.\r
* You may obtain a copy of the License at\r
* See the License for the specific language governing permissions and\r
* limitations under the License.\r
*/\r
+using System;\r
+using BarcodeFormat = com.google.zxing.BarcodeFormat;\r
+using ReaderException = com.google.zxing.ReaderException;\r
+using BitArray = com.google.zxing.common.BitArray;\r
namespace com.google.zxing.oned\r
{\r
- /**\r
- * <p>Implements decoding of the EAN-13 format.</p>\r
- *\r
- * @author dswitkin@google.com (Daniel Switkin)\r
- * @author Sean Owen\r
- * @author alasdair@google.com (Alasdair Mackintosh)\r
- */\r
-\r
- using System.Text;\r
- using com.google.zxing.common;\r
-\r
- public sealed class EAN13Reader : AbstractUPCEANReader \r
- {\r
- // For an EAN-13 barcode, the first digit is represented by the parities used\r
- // to encode the next six digits, according to the table below. For example,\r
- // if the barcode is 5 123456 789012 then the value of the first digit is\r
- // signified by using odd for '1', even for '2', even for '3', odd for '4',\r
- // odd for '5', and even for '6'. See http://en.wikipedia.org/wiki/EAN-13\r
- //\r
- // Parity of next 6 digits\r
- // Digit 0 1 2 3 4 5\r
- // 0 Odd Odd Odd Odd Odd Odd\r
- // 1 Odd Odd Even Odd Even Even\r
- // 2 Odd Odd Even Even Odd Even\r
- // 3 Odd Odd Even Even Even Odd\r
- // 4 Odd Even Odd Odd Even Even\r
- // 5 Odd Even Even Odd Odd Even\r
- // 6 Odd Even Even Even Odd Odd\r
- // 7 Odd Even Odd Even Odd Even\r
- // 8 Odd Even Odd Even Even Odd\r
- // 9 Odd Even Even Odd Even Odd\r
- //\r
- // Note that the encoding for '0' uses the same parity as a UPC barcode. Hence\r
- // a UPC barcode can be converted to an EAN-13 barcode by prepending a 0.\r
- //\r
- // The encodong is represented by the following array, which is a bit pattern\r
- // using Odd = 0 and Even = 1. For example, 5 is represented by:\r
- //\r
- // Odd Even Even Odd Odd Even\r
- // in binary:\r
- // 0 1 1 0 0 1 == 0x19\r
- //\r
- private static int[] FIRST_DIGIT_ENCODINGS = {\r
- 0x00, 0x0B, 0x0D, 0xE, 0x13, 0x19, 0x1C, 0x15, 0x16, 0x1A\r
- };\r
-\r
- private int[] decodeMiddleCounters;\r
-\r
- public EAN13Reader() {\r
- decodeMiddleCounters = new int[4];\r
- }\r
-\r
- protected override int decodeMiddle(BitArray row, int[] startRange, StringBuilder resultString) {\r
- int[] counters = decodeMiddleCounters;\r
- counters[0] = 0;\r
- counters[1] = 0;\r
- counters[2] = 0;\r
- counters[3] = 0;\r
- int end = row.getSize();\r
- int rowOffset = startRange[1];\r
-\r
- int lgPatternFound = 0;\r
-\r
- for (int x = 0; x < 6 && rowOffset < end; x++) {\r
- int bestMatch = decodeDigit(row, counters, rowOffset, L_AND_G_PATTERNS);\r
- resultString.Append((char) ('0' + bestMatch % 10));\r
- for (int i = 0; i < counters.Length; i++) {\r
- rowOffset += counters[i];\r
- }\r
- if (bestMatch >= 10) {\r
- lgPatternFound |= 1 << (5 - x);\r
- }\r
- }\r
-\r
- determineFirstDigit(resultString, lgPatternFound);\r
-\r
- int[] middleRange = findGuardPattern(row, rowOffset, true, MIDDLE_PATTERN);\r
- rowOffset = middleRange[1];\r
-\r
- for (int x = 0; x < 6 && rowOffset < end; x++) {\r
- int bestMatch = decodeDigit(row, counters, rowOffset, L_PATTERNS);\r
- resultString.Append((char) ('0' + bestMatch));\r
- for (int i = 0; i < counters.Length; i++) {\r
- rowOffset += counters[i];\r
- }\r
- }\r
-\r
- return rowOffset;\r
- }\r
-\r
- public override BarcodeFormat getBarcodeFormat() {\r
- return BarcodeFormat.EAN_13;\r
- }\r
-\r
- /**\r
- * Based on pattern of odd-even ('L' and 'G') patterns used to encoded the explicitly-encoded digits\r
- * in a barcode, determines the implicitly encoded first digit and adds it to the result string.\r
- *\r
- * @param resultString string to insert decoded first digit into\r
- * @param lgPatternFound int whose bits indicates the pattern of odd/even L/G patterns used to\r
- * encode digits\r
- * @throws ReaderException if first digit cannot be determined\r
- */\r
- private static void determineFirstDigit(StringBuilder resultString, int lgPatternFound) {\r
- for (int d = 0; d < 10; d++) {\r
- if (lgPatternFound == FIRST_DIGIT_ENCODINGS[d]) {\r
- resultString.Insert(0, (char) ('0' + d));\r
- return;\r
- }\r
- }\r
- throw new ReaderException();\r
- }\r
-\r
- \r
- \r
- }\r
+ \r
+ /// <summary> <p>Implements decoding of the EAN-13 format.</p>\r
+ /// \r
+ /// </summary>\r
+ /// <author> dswitkin@google.com (Daniel Switkin)\r
+ /// </author>\r
+ /// <author> Sean Owen\r
+ /// </author>\r
+ /// <author> alasdair@google.com (Alasdair Mackintosh)\r
+ /// </author>\r
+ /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
+ /// </author>\r
+ public sealed class EAN13Reader:UPCEANReader\r
+ {\r
+ override internal BarcodeFormat BarcodeFormat\r
+ {\r
+ get\r
+ {\r
+ return BarcodeFormat.EAN_13;\r
+ }\r
+ \r
+ }\r
+ \r
+ // For an EAN-13 barcode, the first digit is represented by the parities used\r
+ // to encode the next six digits, according to the table below. For example,\r
+ // if the barcode is 5 123456 789012 then the value of the first digit is\r
+ // signified by using odd for '1', even for '2', even for '3', odd for '4',\r
+ // odd for '5', and even for '6'. See http://en.wikipedia.org/wiki/EAN-13\r
+ //\r
+ // Parity of next 6 digits\r
+ // Digit 0 1 2 3 4 5\r
+ // 0 Odd Odd Odd Odd Odd Odd\r
+ // 1 Odd Odd Even Odd Even Even\r
+ // 2 Odd Odd Even Even Odd Even\r
+ // 3 Odd Odd Even Even Even Odd\r
+ // 4 Odd Even Odd Odd Even Even\r
+ // 5 Odd Even Even Odd Odd Even\r
+ // 6 Odd Even Even Even Odd Odd\r
+ // 7 Odd Even Odd Even Odd Even\r
+ // 8 Odd Even Odd Even Even Odd\r
+ // 9 Odd Even Even Odd Even Odd\r
+ //\r
+ // Note that the encoding for '0' uses the same parity as a UPC barcode. Hence\r
+ // a UPC barcode can be converted to an EAN-13 barcode by prepending a 0.\r
+ //\r
+ // The encoding is represented by the following array, which is a bit pattern\r
+ // using Odd = 0 and Even = 1. For example, 5 is represented by:\r
+ //\r
+ // Odd Even Even Odd Odd Even\r
+ // in binary:\r
+ // 0 1 1 0 0 1 == 0x19\r
+ //\r
+ //UPGRADE_NOTE: Final was removed from the declaration of 'FIRST_DIGIT_ENCODINGS'. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"\r
+ internal static readonly int[] FIRST_DIGIT_ENCODINGS = new int[]{0x00, 0x0B, 0x0D, 0xE, 0x13, 0x19, 0x1C, 0x15, 0x16, 0x1A};\r
+ \r
+ //UPGRADE_NOTE: Final was removed from the declaration of 'decodeMiddleCounters '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"\r
+ private int[] decodeMiddleCounters;\r
+ \r
+ public EAN13Reader()\r
+ {\r
+ decodeMiddleCounters = new int[4];\r
+ }\r
+ \r
+ protected internal override int decodeMiddle(BitArray row, int[] startRange, System.Text.StringBuilder resultString)\r
+ {\r
+ int[] counters = decodeMiddleCounters;\r
+ counters[0] = 0;\r
+ counters[1] = 0;\r
+ counters[2] = 0;\r
+ counters[3] = 0;\r
+ int end = row.Size;\r
+ int rowOffset = startRange[1];\r
+ \r
+ int lgPatternFound = 0;\r
+ \r
+ for (int x = 0; x < 6 && rowOffset < end; x++)\r
+ {\r
+ int bestMatch = decodeDigit(row, counters, rowOffset, L_AND_G_PATTERNS);\r
+ resultString.Append((char) ('0' + bestMatch % 10));\r
+ for (int i = 0; i < counters.Length; i++)\r
+ {\r
+ rowOffset += counters[i];\r
+ }\r
+ if (bestMatch >= 10)\r
+ {\r
+ lgPatternFound |= 1 << (5 - x);\r
+ }\r
+ }\r
+ \r
+ determineFirstDigit(resultString, lgPatternFound);\r
+ \r
+ int[] middleRange = findGuardPattern(row, rowOffset, true, MIDDLE_PATTERN);\r
+ rowOffset = middleRange[1];\r
+ \r
+ for (int x = 0; x < 6 && rowOffset < end; x++)\r
+ {\r
+ int bestMatch = decodeDigit(row, counters, rowOffset, L_PATTERNS);\r
+ resultString.Append((char) ('0' + bestMatch));\r
+ for (int i = 0; i < counters.Length; i++)\r
+ {\r
+ rowOffset += counters[i];\r
+ }\r
+ }\r
+ \r
+ return rowOffset;\r
+ }\r
+ \r
+ /// <summary> Based on pattern of odd-even ('L' and 'G') patterns used to encoded the explicitly-encoded\r
+ /// digits in a barcode, determines the implicitly encoded first digit and adds it to the\r
+ /// result string.\r
+ /// \r
+ /// </summary>\r
+ /// <param name="resultString">string to insert decoded first digit into\r
+ /// </param>\r
+ /// <param name="lgPatternFound">int whose bits indicates the pattern of odd/even L/G patterns used to\r
+ /// encode digits\r
+ /// </param>\r
+ /// <throws> ReaderException if first digit cannot be determined </throws>\r
+ private static void determineFirstDigit(System.Text.StringBuilder resultString, int lgPatternFound)\r
+ {\r
+ for (int d = 0; d < 10; d++)\r
+ {\r
+ if (lgPatternFound == FIRST_DIGIT_ENCODINGS[d])\r
+ {\r
+ resultString.Insert(0, (char) ('0' + d));\r
+ return ;\r
+ }\r
+ }\r
+ throw ReaderException.Instance;\r
+ }\r
+ }\r
}
\ No newline at end of file
projects / zxing.git / blobdiff