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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/BC_Reader.h" | |
24 #include "xfa/src/fxbarcode/common/BC_CommonBitArray.h" | |
25 #include "xfa/src/fxbarcode/oned/BC_OneDReader.h" | |
26 #include "xfa/src/fxbarcode/oned/BC_OneDimReader.h" | |
27 #include "xfa/src/fxbarcode/oned/BC_OnedEAN13Reader.h" | |
28 #include "xfa/src/fxbarcode/utils.h" | |
29 | |
30 const int32_t CBC_OnedEAN13Reader::FIRST_DIGIT_ENCODINGS[10] = { | |
31 0x00, 0x0B, 0x0D, 0xE, 0x13, 0x19, 0x1C, 0x15, 0x16, 0x1A}; | |
32 | |
33 CBC_OnedEAN13Reader::CBC_OnedEAN13Reader() {} | |
34 CBC_OnedEAN13Reader::~CBC_OnedEAN13Reader() {} | |
35 void CBC_OnedEAN13Reader::DetermineFirstDigit(CFX_ByteString& result, | |
36 int32_t lgPatternFound, | |
37 int32_t& e) { | |
38 for (int32_t d = 0; d < 10; d++) { | |
39 if (lgPatternFound == FIRST_DIGIT_ENCODINGS[d]) { | |
40 result.Insert(0, (FX_CHAR)('0' + d)); | |
41 return; | |
42 } | |
43 } | |
44 e = BCExceptionNotFound; | |
45 BC_EXCEPTION_CHECK_ReturnVoid(e); | |
46 } | |
47 int32_t CBC_OnedEAN13Reader::DecodeMiddle(CBC_CommonBitArray* row, | |
48 CFX_Int32Array* startRange, | |
49 CFX_ByteString& resultString, | |
50 int32_t& e) { | |
51 CFX_Int32Array counters; | |
52 counters.Add(0); | |
53 counters.Add(0); | |
54 counters.Add(0); | |
55 counters.Add(0); | |
56 int32_t end = row->GetSize(); | |
57 int32_t rowOffset = (*startRange)[1]; | |
58 int32_t lgPatternFound = 0; | |
59 for (int32_t x = 0; x < 6 && rowOffset < end; x++) { | |
60 int32_t bestMatch = | |
61 DecodeDigit(row, &counters, rowOffset, | |
62 &(CBC_OneDimReader::L_AND_G_PATTERNS[0][0]), 20, e); | |
63 BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
64 resultString += (FX_CHAR)('0' + bestMatch % 10); | |
65 for (int32_t i = 0; i < counters.GetSize(); i++) { | |
66 rowOffset += counters[i]; | |
67 } | |
68 if (bestMatch >= 10) { | |
69 lgPatternFound |= 1 << (5 - x); | |
70 } | |
71 } | |
72 DetermineFirstDigit(resultString, lgPatternFound, e); | |
73 BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
74 CFX_Int32Array result; | |
75 result.Add(CBC_OneDimReader::MIDDLE_PATTERN[0]); | |
76 result.Add(CBC_OneDimReader::MIDDLE_PATTERN[1]); | |
77 result.Add(CBC_OneDimReader::MIDDLE_PATTERN[2]); | |
78 result.Add(CBC_OneDimReader::MIDDLE_PATTERN[3]); | |
79 result.Add(CBC_OneDimReader::MIDDLE_PATTERN[4]); | |
80 CFX_Int32Array* middleRange = | |
81 FindGuardPattern(row, rowOffset, TRUE, &result, e); | |
82 BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
83 rowOffset = (*middleRange)[1]; | |
84 delete middleRange; | |
85 for (int32_t Y = 0; Y < 6 && rowOffset < end; Y++) { | |
86 int32_t bestMatch = | |
87 DecodeDigit(row, &counters, rowOffset, | |
88 &(CBC_OneDimReader::L_PATTERNS[0][0]), 10, e); | |
89 BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
90 resultString += (FX_CHAR)('0' + bestMatch); | |
91 for (int32_t k = 0; k < counters.GetSize(); k++) { | |
92 rowOffset += counters[k]; | |
93 } | |
94 } | |
95 return rowOffset; | |
96 } | |
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