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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 "../barcode.h"
#include "../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_ASCIIEncoder.h"
CBC_ASCIIEncoder::CBC_ASCIIEncoder()
{
}
CBC_ASCIIEncoder::~CBC_ASCIIEncoder()
{
}
int32_t CBC_ASCIIEncoder::getEncodingMode()
{
return ASCII_ENCODATION;
}
void CBC_ASCIIEncoder::Encode(CBC_EncoderContext &context, int32_t &e)
{
int32_t n = CBC_HighLevelEncoder::determineConsecutiveDigitCount(context.m_msg, context.m_pos);
if (n >= 2) {
FX_WCHAR code = encodeASCIIDigits(context.m_msg.GetAt(context.m_pos), context.m_msg.GetAt(context.m_pos + 1), e);
if (e != BCExceptionNO) {
return;
}
context.writeCodeword(code);
context.m_pos += 2;
} else {
FX_WCHAR c = context.getCurrentChar();
int32_t newMode = CBC_HighLevelEncoder::lookAheadTest(context.m_msg, context.m_pos, getEncodingMode());
if (newMode != getEncodingMode()) {
switch (newMode) {
case BASE256_ENCODATION:
context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_BASE256);
context.signalEncoderChange(BASE256_ENCODATION);
return;
case C40_ENCODATION:
context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_C40);
context.signalEncoderChange(C40_ENCODATION);
return;
case X12_ENCODATION:
context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_ANSIX12);
context.signalEncoderChange(X12_ENCODATION);
break;
case TEXT_ENCODATION:
context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_TEXT);
context.signalEncoderChange(TEXT_ENCODATION);
break;
case EDIFACT_ENCODATION:
context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_EDIFACT);
context.signalEncoderChange(EDIFACT_ENCODATION);
break;
default:
e = BCExceptionIllegalStateIllegalMode;
return;
}
} else if (CBC_HighLevelEncoder::isExtendedASCII(c)) {
context.writeCodeword(CBC_HighLevelEncoder::UPPER_SHIFT);
context.writeCodeword((FX_WCHAR) (c - 128 + 1));
context.m_pos++;
} else {
context.writeCodeword((FX_WCHAR) (c + 1));
context.m_pos++;
}
}
}
FX_WCHAR CBC_ASCIIEncoder::encodeASCIIDigits(FX_WCHAR digit1, FX_WCHAR digit2, int32_t &e)
{
if (CBC_HighLevelEncoder::isDigit(digit1) && CBC_HighLevelEncoder::isDigit(digit2)) {
int32_t num = (digit1 - 48) * 10 + (digit2 - 48);
FX_WCHAR a = (FX_WCHAR) (num + 130);
return (FX_WCHAR) (num + 130);
}
e = BCExceptionIllegalArgumentNotGigits;
return 0;
}
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