// -*- 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>

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:

            OneDReader();
            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) = 0;

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

    }
}

#endif