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87 lines
3.2 KiB
87 lines
3.2 KiB
// Copyright 2014 PDFium Authors. All rights reserved. |
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// Use of this source code is governed by a BSD-style license that can be |
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// found in the LICENSE file. |
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
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// Original code is licensed as follows: |
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/* |
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* Copyright 2006-2007 Jeremias Maerki. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include "xfa/fxbarcode/BC_Dimension.h" |
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#include "xfa/fxbarcode/datamatrix/BC_Base256Encoder.h" |
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#include "xfa/fxbarcode/datamatrix/BC_Encoder.h" |
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#include "xfa/fxbarcode/datamatrix/BC_EncoderContext.h" |
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#include "xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.h" |
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#include "xfa/fxbarcode/datamatrix/BC_SymbolInfo.h" |
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#include "xfa/fxbarcode/datamatrix/BC_SymbolShapeHint.h" |
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CBC_Base256Encoder::CBC_Base256Encoder() {} |
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CBC_Base256Encoder::~CBC_Base256Encoder() {} |
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int32_t CBC_Base256Encoder::getEncodingMode() { |
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return BASE256_ENCODATION; |
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} |
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void CBC_Base256Encoder::Encode(CBC_EncoderContext& context, int32_t& e) { |
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CFX_WideString buffer; |
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buffer += (FX_WCHAR)'\0'; |
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while (context.hasMoreCharacters()) { |
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FX_WCHAR c = context.getCurrentChar(); |
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buffer += c; |
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context.m_pos++; |
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int32_t newMode = CBC_HighLevelEncoder::lookAheadTest( |
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context.m_msg, context.m_pos, getEncodingMode()); |
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if (newMode != getEncodingMode()) { |
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context.signalEncoderChange(newMode); |
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break; |
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} |
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} |
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int32_t dataCount = buffer.GetLength() - 1; |
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FX_CHAR buf[128]; |
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FXSYS_itoa(dataCount, buf, 10); |
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buffer.SetAt(0, FX_WCHAR(*buf) - '0'); |
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int32_t lengthFieldSize = 1; |
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int32_t currentSize = |
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context.getCodewordCount() + dataCount + lengthFieldSize; |
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context.updateSymbolInfo(currentSize, e); |
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if (e != BCExceptionNO) { |
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return; |
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} |
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bool mustPad = (context.m_symbolInfo->m_dataCapacity - currentSize) > 0; |
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if (context.hasMoreCharacters() || mustPad) { |
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if (dataCount <= 249) { |
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buffer.SetAt(0, (FX_WCHAR)dataCount); |
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} else if (dataCount > 249 && dataCount <= 1555) { |
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buffer.SetAt(0, (FX_WCHAR)((dataCount / 250) + 249)); |
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buffer.Insert(1, (FX_WCHAR)(dataCount % 250)); |
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} else { |
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e = BCExceptionIllegalStateMessageLengthInvalid; |
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return; |
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} |
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} |
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for (int32_t i = 0, c = buffer.GetLength(); i < c; i++) { |
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context.writeCodeword( |
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randomize255State(buffer.GetAt(i), context.getCodewordCount() + 1)); |
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} |
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} |
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FX_WCHAR CBC_Base256Encoder::randomize255State(FX_WCHAR ch, |
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int32_t codewordPosition) { |
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int32_t pseudoRandom = ((149 * codewordPosition) % 255) + 1; |
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int32_t tempVariable = ch + pseudoRandom; |
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if (tempVariable <= 255) { |
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return (FX_WCHAR)tempVariable; |
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} else { |
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return (FX_WCHAR)(tempVariable - 256); |
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} |
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}
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