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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
#include "barcode.h"
#include "include/BC_Encoder.h"
#include "include/BC_Dimension.h"
#include "include/BC_SymbolShapeHint.h"
#include "include/BC_SymbolInfo.h"
#include "include/BC_EncoderContext.h"
#include "include/BC_HighLevelEncoder.h"
#include "include/BC_Base256Encoder.h"
CBC_Base256Encoder::CBC_Base256Encoder()
{
}
CBC_Base256Encoder::~CBC_Base256Encoder()
{
}
FX_INT32 CBC_Base256Encoder::getEncodingMode()
{
return BASE256_ENCODATION;
}
void CBC_Base256Encoder::Encode(CBC_EncoderContext &context, FX_INT32 &e)
{
CFX_WideString buffer;
buffer += (FX_WCHAR)'\0';
while (context.hasMoreCharacters()) {
FX_WCHAR c = context.getCurrentChar();
buffer += c;
context.m_pos++;
FX_INT32 newMode = CBC_HighLevelEncoder::lookAheadTest(context.m_msg, context.m_pos, getEncodingMode());
if (newMode != getEncodingMode()) {
context.signalEncoderChange(newMode);
break;
}
}
FX_INT32 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');
FX_INT32 lengthFieldSize = 1;
FX_INT32 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 (FX_INT32 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, FX_INT32 codewordPosition)
{
FX_INT32 pseudoRandom = ((149 * codewordPosition) % 255) + 1;
FX_INT32 tempVariable = ch + pseudoRandom;
if (tempVariable <= 255) {
return (FX_WCHAR) tempVariable;
} else {
return (FX_WCHAR) (tempVariable - 256);
}
}
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