// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
#ifndef __ITF_READER_H__
#define __ITF_READER_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 <zxing/oned/OneDReader.h>
#include <zxing/common/BitArray.h>
#include <zxing/Result.h>

namespace zxing {
    namespace oned {

        class ITFReader : public OneDReader {
        private:
            enum { MAX_AVG_VARIANCE = (unsigned int)(PATTERN_MATCH_RESULT_SCALE_FACTOR * 420 / 1000) };
            enum { MAX_INDIVIDUAL_VARIANCE = (int)(PATTERN_MATCH_RESULT_SCALE_FACTOR * 780 / 1000) };
            // Stores the actual narrow line width of the image being decoded.
            int narrowLineWidth;

            Range decodeStart(Ref<BitArray> row);
            Range decodeEnd(Ref<BitArray> row);
            static void decodeMiddle(Ref<BitArray> row, int payloadStart, int payloadEnd, std::string& resultString);
            void validateQuietZone(Ref<BitArray> row, int startPattern);
            static int skipWhiteSpace(Ref<BitArray> row);

            static Range findGuardPattern(Ref<BitArray> row, int rowOffset, std::vector<int> const& pattern);
            static int decodeDigit(std::vector<int>& counters);

            void append(char* s, char c);
        public:
            Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row);
            ITFReader();
            ~ITFReader();
        };

    }
}

#endif