1// Copyright 2014 PDFium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6// Original code is licensed as follows:
7/*
8 * Copyright 2008 ZXing authors
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 *      http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 */
22
23#include "xfa/src/fxbarcode/barcode.h"
24#include "xfa/src/fxbarcode/BC_Reader.h"
25#include "xfa/src/fxbarcode/common/BC_CommonBitArray.h"
26#include "BC_OneDReader.h"
27#include "BC_OneDimReader.h"
28#include "BC_OnedEAN13Reader.h"
29const int32_t CBC_OnedEAN13Reader::FIRST_DIGIT_ENCODINGS[10] = {
30    0x00, 0x0B, 0x0D, 0xE, 0x13, 0x19, 0x1C, 0x15, 0x16, 0x1A};
31CBC_OnedEAN13Reader::CBC_OnedEAN13Reader() {}
32CBC_OnedEAN13Reader::~CBC_OnedEAN13Reader() {}
33void CBC_OnedEAN13Reader::DetermineFirstDigit(CFX_ByteString& result,
34                                              int32_t lgPatternFound,
35                                              int32_t& e) {
36  for (int32_t d = 0; d < 10; d++) {
37    if (lgPatternFound == FIRST_DIGIT_ENCODINGS[d]) {
38      result.Insert(0, (FX_CHAR)('0' + d));
39      return;
40    }
41  }
42  e = BCExceptionNotFound;
43  BC_EXCEPTION_CHECK_ReturnVoid(e);
44}
45int32_t CBC_OnedEAN13Reader::DecodeMiddle(CBC_CommonBitArray* row,
46                                          CFX_Int32Array* startRange,
47                                          CFX_ByteString& resultString,
48                                          int32_t& e) {
49  CFX_Int32Array counters;
50  counters.Add(0);
51  counters.Add(0);
52  counters.Add(0);
53  counters.Add(0);
54  int32_t end = row->GetSize();
55  int32_t rowOffset = (*startRange)[1];
56  int32_t lgPatternFound = 0;
57  for (int32_t x = 0; x < 6 && rowOffset < end; x++) {
58    int32_t bestMatch =
59        DecodeDigit(row, &counters, rowOffset,
60                    &(CBC_OneDimReader::L_AND_G_PATTERNS[0][0]), 20, e);
61    BC_EXCEPTION_CHECK_ReturnValue(e, 0);
62    resultString += (FX_CHAR)('0' + bestMatch % 10);
63    for (int32_t i = 0; i < counters.GetSize(); i++) {
64      rowOffset += counters[i];
65    }
66    if (bestMatch >= 10) {
67      lgPatternFound |= 1 << (5 - x);
68    }
69  }
70  DetermineFirstDigit(resultString, lgPatternFound, e);
71  BC_EXCEPTION_CHECK_ReturnValue(e, 0);
72  CFX_Int32Array result;
73  result.Add(CBC_OneDimReader::MIDDLE_PATTERN[0]);
74  result.Add(CBC_OneDimReader::MIDDLE_PATTERN[1]);
75  result.Add(CBC_OneDimReader::MIDDLE_PATTERN[2]);
76  result.Add(CBC_OneDimReader::MIDDLE_PATTERN[3]);
77  result.Add(CBC_OneDimReader::MIDDLE_PATTERN[4]);
78  CFX_Int32Array* middleRange =
79      FindGuardPattern(row, rowOffset, TRUE, &result, e);
80  BC_EXCEPTION_CHECK_ReturnValue(e, 0);
81  rowOffset = (*middleRange)[1];
82  if (middleRange != NULL) {
83    delete middleRange;
84    middleRange = NULL;
85  }
86  for (int32_t Y = 0; Y < 6 && rowOffset < end; Y++) {
87    int32_t bestMatch =
88        DecodeDigit(row, &counters, rowOffset,
89                    &(CBC_OneDimReader::L_PATTERNS[0][0]), 10, e);
90    BC_EXCEPTION_CHECK_ReturnValue(e, 0);
91    resultString += (FX_CHAR)('0' + bestMatch);
92    for (int32_t k = 0; k < counters.GetSize(); k++) {
93      rowOffset += counters[k];
94    }
95  }
96  return rowOffset;
97}
98