// 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 2006-2007 Jeremias Maerki. | |
* | |
* 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/src/fxbarcode/barcode.h" | |
#include "xfa/src/fxbarcode/BC_Dimension.h" | |
#include "BC_Encoder.h" | |
#include "BC_SymbolShapeHint.h" | |
#include "BC_SymbolInfo.h" | |
#include "BC_EncoderContext.h" | |
#include "BC_HighLevelEncoder.h" | |
#include "BC_Base256Encoder.h" | |
CBC_Base256Encoder::CBC_Base256Encoder() {} | |
CBC_Base256Encoder::~CBC_Base256Encoder() {} | |
int32_t CBC_Base256Encoder::getEncodingMode() { | |
return BASE256_ENCODATION; | |
} | |
void CBC_Base256Encoder::Encode(CBC_EncoderContext& context, int32_t& e) { | |
CFX_WideString buffer; | |
buffer += (FX_WCHAR)'\0'; | |
while (context.hasMoreCharacters()) { | |
FX_WCHAR c = context.getCurrentChar(); | |
buffer += c; | |
context.m_pos++; | |
int32_t newMode = CBC_HighLevelEncoder::lookAheadTest( | |
context.m_msg, context.m_pos, getEncodingMode()); | |
if (newMode != getEncodingMode()) { | |
context.signalEncoderChange(newMode); | |
break; | |
} | |
} | |
int32_t dataCount = buffer.GetLength() - 1; | |
FX_CHAR buf[128]; | |
#if defined(_FX_WINAPI_PARTITION_APP_) | |
memset(buf, 0, sizeof(FX_CHAR) * 128); | |
_itoa_s(dataCount, buf, 128, 10); | |
#else | |
FXSYS_itoa(dataCount, buf, 10); | |
#endif | |
buffer.SetAt(0, FX_WCHAR(*buf) - '0'); | |
int32_t lengthFieldSize = 1; | |
int32_t currentSize = | |
context.getCodewordCount() + dataCount + lengthFieldSize; | |
context.updateSymbolInfo(currentSize, e); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
FX_BOOL mustPad = (context.m_symbolInfo->m_dataCapacity - currentSize) > 0; | |
if (context.hasMoreCharacters() || mustPad) { | |
if (dataCount <= 249) { | |
buffer.SetAt(0, (FX_WCHAR)dataCount); | |
} else if (dataCount > 249 && dataCount <= 1555) { | |
buffer.SetAt(0, (FX_WCHAR)((dataCount / 250) + 249)); | |
buffer.Insert(1, (FX_WCHAR)(dataCount % 250)); | |
} else { | |
e = BCExceptionIllegalStateMessageLengthInvalid; | |
return; | |
} | |
} | |
for (int32_t i = 0, c = buffer.GetLength(); i < c; i++) { | |
context.writeCodeword( | |
randomize255State(buffer.GetAt(i), context.getCodewordCount() + 1)); | |
} | |
} | |
FX_WCHAR CBC_Base256Encoder::randomize255State(FX_WCHAR ch, | |
int32_t codewordPosition) { | |
int32_t pseudoRandom = ((149 * codewordPosition) % 255) + 1; | |
int32_t tempVariable = ch + pseudoRandom; | |
if (tempVariable <= 255) { | |
return (FX_WCHAR)tempVariable; | |
} else { | |
return (FX_WCHAR)(tempVariable - 256); | |
} | |
} |