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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 2006-2007 Jeremias Maerki. | |
| 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_Dimension.h" | |
| 24 #include "xfa/src/fxbarcode/datamatrix/BC_Base256Encoder.h" | |
| 25 #include "xfa/src/fxbarcode/datamatrix/BC_Encoder.h" | |
| 26 #include "xfa/src/fxbarcode/datamatrix/BC_EncoderContext.h" | |
| 27 #include "xfa/src/fxbarcode/datamatrix/BC_HighLevelEncoder.h" | |
| 28 #include "xfa/src/fxbarcode/datamatrix/BC_SymbolInfo.h" | |
| 29 #include "xfa/src/fxbarcode/datamatrix/BC_SymbolShapeHint.h" | |
| 30 | |
| 31 CBC_Base256Encoder::CBC_Base256Encoder() {} | |
| 32 CBC_Base256Encoder::~CBC_Base256Encoder() {} | |
| 33 int32_t CBC_Base256Encoder::getEncodingMode() { | |
| 34 return BASE256_ENCODATION; | |
| 35 } | |
| 36 void CBC_Base256Encoder::Encode(CBC_EncoderContext& context, int32_t& e) { | |
| 37 CFX_WideString buffer; | |
| 38 buffer += (FX_WCHAR)'\0'; | |
| 39 while (context.hasMoreCharacters()) { | |
| 40 FX_WCHAR c = context.getCurrentChar(); | |
| 41 buffer += c; | |
| 42 context.m_pos++; | |
| 43 int32_t newMode = CBC_HighLevelEncoder::lookAheadTest( | |
| 44 context.m_msg, context.m_pos, getEncodingMode()); | |
| 45 if (newMode != getEncodingMode()) { | |
| 46 context.signalEncoderChange(newMode); | |
| 47 break; | |
| 48 } | |
| 49 } | |
| 50 int32_t dataCount = buffer.GetLength() - 1; | |
| 51 FX_CHAR buf[128]; | |
| 52 FXSYS_itoa(dataCount, buf, 10); | |
| 53 buffer.SetAt(0, FX_WCHAR(*buf) - '0'); | |
| 54 int32_t lengthFieldSize = 1; | |
| 55 int32_t currentSize = | |
| 56 context.getCodewordCount() + dataCount + lengthFieldSize; | |
| 57 context.updateSymbolInfo(currentSize, e); | |
| 58 if (e != BCExceptionNO) { | |
| 59 return; | |
| 60 } | |
| 61 FX_BOOL mustPad = (context.m_symbolInfo->m_dataCapacity - currentSize) > 0; | |
| 62 if (context.hasMoreCharacters() || mustPad) { | |
| 63 if (dataCount <= 249) { | |
| 64 buffer.SetAt(0, (FX_WCHAR)dataCount); | |
| 65 } else if (dataCount > 249 && dataCount <= 1555) { | |
| 66 buffer.SetAt(0, (FX_WCHAR)((dataCount / 250) + 249)); | |
| 67 buffer.Insert(1, (FX_WCHAR)(dataCount % 250)); | |
| 68 } else { | |
| 69 e = BCExceptionIllegalStateMessageLengthInvalid; | |
| 70 return; | |
| 71 } | |
| 72 } | |
| 73 for (int32_t i = 0, c = buffer.GetLength(); i < c; i++) { | |
| 74 context.writeCodeword( | |
| 75 randomize255State(buffer.GetAt(i), context.getCodewordCount() + 1)); | |
| 76 } | |
| 77 } | |
| 78 FX_WCHAR CBC_Base256Encoder::randomize255State(FX_WCHAR ch, | |
| 79 int32_t codewordPosition) { | |
| 80 int32_t pseudoRandom = ((149 * codewordPosition) % 255) + 1; | |
| 81 int32_t tempVariable = ch + pseudoRandom; | |
| 82 if (tempVariable <= 255) { | |
| 83 return (FX_WCHAR)tempVariable; | |
| 84 } else { | |
| 85 return (FX_WCHAR)(tempVariable - 256); | |
| 86 } | |
| 87 } | |
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