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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// Original code is licensed as follows:
/*
* Copyright 2008 ZXing authors
*
* 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 "../barcode.h"
#include "../BC_Reader.h"
#include "../common/BC_CommonBitArray.h"
#include "BC_OneDReader.h"
#include "BC_OneDimReader.h"
#include "BC_OnedEAN13Reader.h"
const int32_t CBC_OnedEAN13Reader::FIRST_DIGIT_ENCODINGS[10] = {
0x00, 0x0B, 0x0D, 0xE, 0x13, 0x19, 0x1C, 0x15, 0x16, 0x1A};
CBC_OnedEAN13Reader::CBC_OnedEAN13Reader() {}
CBC_OnedEAN13Reader::~CBC_OnedEAN13Reader() {}
void CBC_OnedEAN13Reader::DetermineFirstDigit(CFX_ByteString& result,
int32_t lgPatternFound,
int32_t& e) {
for (int32_t d = 0; d < 10; d++) {
if (lgPatternFound == FIRST_DIGIT_ENCODINGS[d]) {
result.Insert(0, (FX_CHAR)('0' + d));
return;
}
}
e = BCExceptionNotFound;
BC_EXCEPTION_CHECK_ReturnVoid(e);
}
int32_t CBC_OnedEAN13Reader::DecodeMiddle(CBC_CommonBitArray* row,
CFX_Int32Array* startRange,
CFX_ByteString& resultString,
int32_t& e) {
CFX_Int32Array counters;
counters.Add(0);
counters.Add(0);
counters.Add(0);
counters.Add(0);
int32_t end = row->GetSize();
int32_t rowOffset = (*startRange)[1];
int32_t lgPatternFound = 0;
for (int32_t x = 0; x < 6 && rowOffset < end; x++) {
int32_t bestMatch =
DecodeDigit(row, &counters, rowOffset,
&(CBC_OneDimReader::L_AND_G_PATTERNS[0][0]), 20, e);
BC_EXCEPTION_CHECK_ReturnValue(e, 0);
resultString += (FX_CHAR)('0' + bestMatch % 10);
for (int32_t i = 0; i < counters.GetSize(); i++) {
rowOffset += counters[i];
}
if (bestMatch >= 10) {
lgPatternFound |= 1 << (5 - x);
}
}
DetermineFirstDigit(resultString, lgPatternFound, e);
BC_EXCEPTION_CHECK_ReturnValue(e, 0);
CFX_Int32Array result;
result.Add(CBC_OneDimReader::MIDDLE_PATTERN[0]);
result.Add(CBC_OneDimReader::MIDDLE_PATTERN[1]);
result.Add(CBC_OneDimReader::MIDDLE_PATTERN[2]);
result.Add(CBC_OneDimReader::MIDDLE_PATTERN[3]);
result.Add(CBC_OneDimReader::MIDDLE_PATTERN[4]);
CFX_Int32Array* middleRange =
FindGuardPattern(row, rowOffset, TRUE, &result, e);
BC_EXCEPTION_CHECK_ReturnValue(e, 0);
rowOffset = (*middleRange)[1];
if (middleRange != NULL) {
delete middleRange;
middleRange = NULL;
}
for (int32_t Y = 0; Y < 6 && rowOffset < end; Y++) {
int32_t bestMatch =
DecodeDigit(row, &counters, rowOffset,
&(CBC_OneDimReader::L_PATTERNS[0][0]), 10, e);
BC_EXCEPTION_CHECK_ReturnValue(e, 0);
resultString += (FX_CHAR)('0' + bestMatch);
for (int32_t k = 0; k < counters.GetSize(); k++) {
rowOffset += counters[k];
}
}
return rowOffset;
}
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