DecodedBitStreamParser.h Example File

 // -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
 #ifndef __DECODED_BIT_STREAM_PARSER_PD_H__
 #define __DECODED_BIT_STREAM_PARSER_PD_H__

 /*
  * Copyright 2010 ZXing authors All rights reserved.
  *
  * 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.
  */

 #include <bigint/BigInteger.hh>
 #include <zxing/common/Array.h>
 #include <zxing/common/Str.h>
 #include <zxing/common/DecoderResult.h>

 namespace zxing {
 namespace pdf417 {

 class DecodedBitStreamParser {
  protected:
   enum Mode {
     ALPHA,
     LOWER,
     MIXED,
     PUNCT,
     ALPHA_SHIFT,
     PUNCT_SHIFT
   };

  private:

   static const int TEXT_COMPACTION_MODE_LATCH;
   static const int BYTE_COMPACTION_MODE_LATCH;
   static const int NUMERIC_COMPACTION_MODE_LATCH;
   static const int BYTE_COMPACTION_MODE_LATCH_6;
   static const int BEGIN_MACRO_PDF417_CONTROL_BLOCK;
   static const int BEGIN_MACRO_PDF417_OPTIONAL_FIELD;
   static const int MACRO_PDF417_TERMINATOR;
   static const int MODE_SHIFT_TO_BYTE_COMPACTION_MODE;
   static const int MAX_NUMERIC_CODEWORDS;

   static const int PL;
   static const int LL;
   static const int AS;
   static const int ML;
   static const int AL;
   static const int PS;
   static const int PAL;
   static const int EXP900_SIZE;

   static const char PUNCT_CHARS[];
   static const char MIXED_CHARS[];

   static ArrayRef<BigInteger> EXP900;
   static ArrayRef<BigInteger> initEXP900();

   static int textCompaction(ArrayRef<int> codewords, int codeIndex, Ref<String> result);
   static void decodeTextCompaction(ArrayRef<int> textCompactionData,
                                    ArrayRef<int> byteCompactionData,
                                    int length,
                                    Ref<String> result);
   static int byteCompaction(int mode, ArrayRef<int> codewords, int codeIndex, Ref<String> result);
   static int numericCompaction(ArrayRef<int> codewords, int codeIndex, Ref<String> result);
   static Ref<String> decodeBase900toBase10(ArrayRef<int> codewords, int count);

  public:
   DecodedBitStreamParser();
   static Ref<DecoderResult> decode(ArrayRef<int> codewords);
 };

 } /* namespace pdf417 */
 } /* namespace zxing */

 #endif // __DECODED_BIT_STREAM_PARSER_PD_H__