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/fxbarcode/BC_Dimension.h" 24 #include "xfa/fxbarcode/datamatrix/BC_Base256Encoder.h" 25 #include "xfa/fxbarcode/datamatrix/BC_Encoder.h" 26 #include "xfa/fxbarcode/datamatrix/BC_EncoderContext.h" 27 #include "xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.h" 28 #include "xfa/fxbarcode/datamatrix/BC_SymbolInfo.h" 29 #include "xfa/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 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 } 88