mirror of https://github.com/status-im/qzxing.git
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
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/*
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* EAN8Reader.cpp
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* ZXing
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*
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* Copyright 2010 ZXing authors All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "EAN8Reader.h"
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#include <zxing/ReaderException.h>
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namespace zxing {
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namespace oned {
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EAN8Reader::EAN8Reader(){ }
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int EAN8Reader::decodeMiddle(Ref<BitArray> row, int startGuardBegin, int startGuardEnd,
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std::string& resultString){
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const int countersLen = 4;
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int counters[countersLen] = { 0, 0, 0, 0 };
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int end = row->getSize();
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int rowOffset = startGuardEnd;
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for (int x = 0; x < 4 && rowOffset < end; x++) {
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int bestMatch = decodeDigit(row, counters, countersLen, rowOffset,
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UPC_EAN_PATTERNS_L_PATTERNS);
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if (bestMatch < 0) {
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return -1;
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}
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resultString.append(1, (char) ('0' + bestMatch));
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for (int i = 0; i < countersLen; i++) {
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rowOffset += counters[i];
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}
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}
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int middleRangeStart;
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int middleRangeEnd;
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if (findGuardPattern(row, rowOffset, true, (int*)getMIDDLE_PATTERN(),
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getMIDDLE_PATTERN_LEN(), &middleRangeStart, &middleRangeEnd)) {
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rowOffset = middleRangeEnd;
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for (int x = 0; x < 4 && rowOffset < end; x++) {
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int bestMatch = decodeDigit(row, counters, countersLen, rowOffset,
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UPC_EAN_PATTERNS_L_PATTERNS);
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if (bestMatch < 0) {
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return -1;
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}
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resultString.append(1, (char) ('0' + bestMatch));
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for (int i = 0; i < countersLen; i++) {
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rowOffset += counters[i];
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}
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}
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return rowOffset;
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}
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return -1;
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}
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BarcodeFormat EAN8Reader::getBarcodeFormat(){
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return BarcodeFormat_EAN_8;
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}
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}
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}
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