2 * MultiFormatUPCEANReader.cpp
5 * Created by Lukasz Warchol on 10-01-25.
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.
20 #include "MultiFormatUPCEANReader.h"
22 #include <zxing/oned/EAN13Reader.h>
23 #include <zxing/oned/EAN8Reader.h>
24 #include <zxing/oned/UPCEReader.h>
25 #include <zxing/oned/OneDResultPoint.h>
26 #include <zxing/common/Array.h>
27 #include <zxing/ReaderException.h>
33 MultiFormatUPCEANReader::MultiFormatUPCEANReader(){
34 readers = new std::vector<OneDReader*>();
35 readers->push_back(new EAN13Reader());
36 // UPC-A is covered by EAN-13
37 readers->push_back(new EAN8Reader());
38 readers->push_back(new UPCEReader());
41 Ref<Result> MultiFormatUPCEANReader::decodeRow(int rowNumber, Ref<BitArray> row){
42 // Compute this location once and reuse it on multiple implementations
43 int size = readers->size();
44 for (int i = 0; i < size; i++) {
45 OneDReader* reader = (*readers)[i];
48 result = reader->decodeRow(rowNumber, row);//decodeRow(rowNumber, row, startGuardPattern);
49 } catch (ReaderException re) {
52 // Special case: a 12-digit code encoded in UPC-A is identical to a "0"
53 // followed by those 12 digits encoded as EAN-13. Each will recognize such a code,
54 // UPC-A as a 12-digit string and EAN-13 as a 13-digit string starting with "0".
55 // Individually these are correct and their readers will both read such a code
56 // and correctly call it EAN-13, or UPC-A, respectively.
58 // In this case, if we've been looking for both types, we'd like to call it
59 // a UPC-A code. But for efficiency we only run the EAN-13 decoder to also read
60 // UPC-A. So we special case it here, and convert an EAN-13 result to a UPC-A
61 // result if appropriate.
62 if (result->getBarcodeFormat() == BarcodeFormat_EAN_13) {
63 std::string& text = (result->getText())->getText();
65 Ref<String> resultString(new String(text.substr(1)));
66 Ref<Result> res(new Result(resultString, result->getRawBytes(), result->getResultPoints(), BarcodeFormat_UPC_A));
72 throw ReaderException("No EAN code detected");
75 MultiFormatUPCEANReader::~MultiFormatUPCEANReader(){