OneDReader.h Example File

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

 /*
  *  OneDReader.h
  *  ZXing
  *
  *  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 <zxing/Reader.h>
 #include <zxing/DecodeHints.h>

 namespace zxing {
 namespace oned {

 class OneDReader : public Reader {
 private:
   Ref<Result> doDecode(Ref<BinaryBitmap> image, DecodeHints hints);

 protected:
   static const int INTEGER_MATH_SHIFT = 8;

   struct Range {
   private:
     int data[2];
   public:
     Range() {}
     Range(int zero, int one) {
       data[0] = zero;
       data[1] = one;
     }
     int& operator [] (int index) {
       return data[index];
     }
     int const& operator [] (int index) const {
       return data[index];
     }
   };

   static int patternMatchVariance(std::vector<int>& counters,
                                   std::vector<int> const& pattern,
                                   int maxIndividualVariance);
   static int patternMatchVariance(std::vector<int>& counters,
                                   int const pattern[],
                                   int maxIndividualVariance);

 protected:
   static const int PATTERN_MATCH_RESULT_SCALE_FACTOR = 1 << INTEGER_MATH_SHIFT;

 public:

   virtual Ref<Result> decode(Ref<BinaryBitmap> image, DecodeHints hints);

   // Implementations must not throw any exceptions. If a barcode is not found on this row,
   // a empty ref should be returned e.g. return Ref<Result>();
   virtual Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row, DecodeHints hints) = 0;

   static void recordPattern(Ref<BitArray> row,
                             int start,
                             std::vector<int>& counters);
   virtual ~OneDReader();
 };

 }
 }

 #endif