5 * Created by Lukasz Warchol on 10-01-22.
6 * Copyright 2010 ZXing authors All rights reserved.
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
21 #include "EAN13Reader.h"
22 #include <zxing/ReaderException.h>
27 static const int FIRST_DIGIT_ENCODINGS[10] = {0x00, 0x0B, 0x0D, 0xE, 0x13, 0x19, 0x1C, 0x15, 0x16, 0x1A};
30 EAN13Reader::EAN13Reader() { }
32 int EAN13Reader::decodeMiddle(Ref<BitArray> row, int startRange[], int startRangeLen, std::string& resultString){
33 const int countersLen = 4;
34 int counters[countersLen] = { 0, 0, 0, 0 };
37 int end = row->getSize();
38 int rowOffset = startRange[1];
40 int lgPatternFound = 0;
42 for (int x = 0; x < 6 && rowOffset < end; x++) {
43 int bestMatch = decodeDigit(row, counters, countersLen, rowOffset, UPC_EAN_PATTERNS_L_AND_G_PATTERNS);
44 resultString.append(1, (char) ('0' + bestMatch % 10));
45 for (int i = 0; i < countersLen; i++) {
46 rowOffset += counters[i];
48 if (bestMatch >= 10) {
49 lgPatternFound |= 1 << (5 - x);
53 determineFirstDigit(resultString, lgPatternFound);
55 int* middleRange = findGuardPattern(row, rowOffset, true, (int*)getMIDDLE_PATTERN(), getMIDDLE_PATTERN_LEN());
56 rowOffset = middleRange[1];
58 for (int x = 0; x < 6 && rowOffset < end; x++) {
59 int bestMatch = decodeDigit(row, counters, countersLen, rowOffset, UPC_EAN_PATTERNS_L_PATTERNS);
60 resultString.append(1, (char) ('0' + bestMatch));
61 for (int i = 0; i < countersLen; i++) {
62 rowOffset += counters[i];
69 void EAN13Reader::determineFirstDigit(std::string& resultString, int lgPatternFound){
70 for (int d = 0; d < 10; d++) {
71 if (lgPatternFound == FIRST_DIGIT_ENCODINGS[d]) {
72 resultString.insert(0, 1, (char) ('0' + d));
76 throw ReaderException("determineFirstDigit");
79 BarcodeFormat EAN13Reader::getBarcodeFormat(){
80 return BarcodeFormat_EAN_13;