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// 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/fxbarcode/BC_Dimension.h"
#include "xfa/fxbarcode/datamatrix/BC_Base256Encoder.h"
#include "xfa/fxbarcode/datamatrix/BC_Encoder.h"
#include "xfa/fxbarcode/datamatrix/BC_EncoderContext.h"
#include "xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.h"
#include "xfa/fxbarcode/datamatrix/BC_SymbolInfo.h"
#include "xfa/fxbarcode/datamatrix/BC_SymbolShapeHint.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 += (wchar_t)'\0';
while (context.hasMoreCharacters()) {
wchar_t 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;
char buf[128];
FXSYS_itoa(dataCount, buf, 10);
buffer.SetAt(0, wchar_t(*buf) - '0');
int32_t lengthFieldSize = 1;
int32_t currentSize =
context.getCodewordCount() + dataCount + lengthFieldSize;
context.updateSymbolInfo(currentSize, e);
if (e != BCExceptionNO) {
return;
}
bool mustPad = (context.m_symbolInfo->m_dataCapacity - currentSize) > 0;
if (context.hasMoreCharacters() || mustPad) {
if (dataCount <= 249) {
buffer.SetAt(0, (wchar_t)dataCount);
} else if (dataCount > 249 && dataCount <= 1555) {
buffer.SetAt(0, (wchar_t)((dataCount / 250) + 249));
buffer.Insert(1, (wchar_t)(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));
}
}
wchar_t CBC_Base256Encoder::randomize255State(wchar_t ch,
int32_t codewordPosition) {
int32_t pseudoRandom = ((149 * codewordPosition) % 255) + 1;
int32_t tempVariable = ch + pseudoRandom;
if (tempVariable <= 255) {
return (wchar_t)tempVariable;
} else {
return (wchar_t)(tempVariable - 256);
}
}
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