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"
29 const int32_t CBC_OnedEAN13Reader::FIRST_DIGIT_ENCODINGS[10] = {
30 0x00, 0x0B, 0x0D, 0xE, 0x13, 0x19, 0x1C, 0x15, 0x16, 0x1A};
CBC_OnedEAN13Reader()31 CBC_OnedEAN13Reader::CBC_OnedEAN13Reader() {}
~CBC_OnedEAN13Reader()32 CBC_OnedEAN13Reader::~CBC_OnedEAN13Reader() {}
DetermineFirstDigit(CFX_ByteString & result,int32_t lgPatternFound,int32_t & e)33 void 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 }
DecodeMiddle(CBC_CommonBitArray * row,CFX_Int32Array * startRange,CFX_ByteString & resultString,int32_t & e)45 int32_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