| // 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 "xfa/fxbarcode/BC_Reader.h" |
| #include "xfa/fxbarcode/common/BC_CommonBitArray.h" |
| #include "xfa/fxbarcode/oned/BC_OneDReader.h" |
| #include "xfa/fxbarcode/oned/BC_OneDimReader.h" |
| #include "xfa/fxbarcode/oned/BC_OnedEAN13Reader.h" |
| #include "xfa/fxbarcode/utils.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]; |
| delete middleRange; |
| 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; |
| } |