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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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