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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/common/BC_CommonBitMatrix.h"
#include "xfa/fxbarcode/datamatrix/BC_C40Encoder.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_C40Encoder::CBC_C40Encoder() {}
CBC_C40Encoder::~CBC_C40Encoder() {}
int32_t CBC_C40Encoder::getEncodingMode() {
return C40_ENCODATION;
}
void CBC_C40Encoder::Encode(CBC_EncoderContext& context, int32_t& e) {
CFX_WideString buffer;
while (context.hasMoreCharacters()) {
FX_WCHAR c = context.getCurrentChar();
context.m_pos++;
int32_t lastCharSize = encodeChar(c, buffer, e);
if (e != BCExceptionNO) {
return;
}
int32_t unwritten = (buffer.GetLength() / 3) * 2;
int32_t curCodewordCount = context.getCodewordCount() + unwritten;
context.updateSymbolInfo(curCodewordCount, e);
if (e != BCExceptionNO) {
return;
}
int32_t available = context.m_symbolInfo->m_dataCapacity - curCodewordCount;
if (!context.hasMoreCharacters()) {
CFX_WideString removed;
if ((buffer.GetLength() % 3) == 2) {
if (available < 2 || available > 2) {
lastCharSize =
backtrackOneCharacter(context, buffer, removed, lastCharSize, e);
if (e != BCExceptionNO) {
return;
}
}
}
while ((buffer.GetLength() % 3) == 1 &&
((lastCharSize <= 3 && available != 1) || lastCharSize > 3)) {
lastCharSize =
backtrackOneCharacter(context, buffer, removed, lastCharSize, e);
if (e != BCExceptionNO) {
return;
}
}
break;
}
int32_t count = buffer.GetLength();
if ((count % 3) == 0) {
int32_t newMode = CBC_HighLevelEncoder::lookAheadTest(
context.m_msg, context.m_pos, getEncodingMode());
if (newMode != getEncodingMode()) {
context.signalEncoderChange(newMode);
break;
}
}
}
handleEOD(context, buffer, e);
}
void CBC_C40Encoder::writeNextTriplet(CBC_EncoderContext& context,
CFX_WideString& buffer) {
context.writeCodewords(encodeToCodewords(buffer, 0));
buffer.Delete(0, 3);
}
void CBC_C40Encoder::handleEOD(CBC_EncoderContext& context,
CFX_WideString& buffer,
int32_t& e) {
int32_t unwritten = (buffer.GetLength() / 3) * 2;
int32_t rest = buffer.GetLength() % 3;
int32_t curCodewordCount = context.getCodewordCount() + unwritten;
context.updateSymbolInfo(curCodewordCount, e);
if (e != BCExceptionNO) {
return;
}
int32_t available = context.m_symbolInfo->m_dataCapacity - curCodewordCount;
if (rest == 2) {
buffer += (FX_WCHAR)'\0';
while (buffer.GetLength() >= 3) {
writeNextTriplet(context, buffer);
}
if (context.hasMoreCharacters()) {
context.writeCodeword(CBC_HighLevelEncoder::C40_UNLATCH);
}
} else if (available == 1 && rest == 1) {
while (buffer.GetLength() >= 3) {
writeNextTriplet(context, buffer);
}
if (context.hasMoreCharacters()) {
context.writeCodeword(CBC_HighLevelEncoder::C40_UNLATCH);
}
context.m_pos--;
} else if (rest == 0) {
while (buffer.GetLength() >= 3) {
writeNextTriplet(context, buffer);
}
if (available > 0 || context.hasMoreCharacters()) {
context.writeCodeword(CBC_HighLevelEncoder::C40_UNLATCH);
}
} else {
e = BCExceptionIllegalStateUnexpectedCase;
return;
}
context.signalEncoderChange(ASCII_ENCODATION);
}
int32_t CBC_C40Encoder::encodeChar(FX_WCHAR c, CFX_WideString& sb, int32_t& e) {
if (c == ' ') {
sb += (FX_WCHAR)'\3';
return 1;
} else if ((c >= '0') && (c <= '9')) {
sb += (FX_WCHAR)(c - 48 + 4);
return 1;
} else if ((c >= 'A') && (c <= 'Z')) {
sb += (FX_WCHAR)(c - 65 + 14);
return 1;
} else if (c <= 0x1f) {
sb += (FX_WCHAR)'\0';
sb += c;
return 2;
} else if ((c >= '!') && (c <= '/')) {
sb += (FX_WCHAR)'\1';
sb += (FX_WCHAR)(c - 33);
return 2;
} else if ((c >= ':') && (c <= '@')) {
sb += (FX_WCHAR)'\1';
sb += (FX_WCHAR)(c - 58 + 15);
return 2;
} else if ((c >= '[') && (c <= '_')) {
sb += (FX_WCHAR)'\1';
sb += (FX_WCHAR)(c - 91 + 22);
return 2;
} else if ((c >= 60) && (c <= 0x7f)) {
sb += (FX_WCHAR)'\2';
sb += (FX_WCHAR)(c - 96);
return 2;
} else if (c >= 80) {
sb += (FX_WCHAR)'\1';
sb += (FX_WCHAR)0x001e;
int32_t len = 2;
len += encodeChar((c - 128), sb, e);
BC_EXCEPTION_CHECK_ReturnValue(e, 0);
return len;
} else {
e = BCExceptionIllegalArgument;
return 0;
}
}
int32_t CBC_C40Encoder::backtrackOneCharacter(CBC_EncoderContext& context,
CFX_WideString& buffer,
CFX_WideString& removed,
int32_t lastCharSize,
int32_t& e) {
int32_t count = buffer.GetLength();
buffer.Delete(count - lastCharSize, count);
context.m_pos--;
FX_WCHAR c = context.getCurrentChar();
lastCharSize = encodeChar(c, removed, e);
BC_EXCEPTION_CHECK_ReturnValue(e, -1);
context.resetSymbolInfo();
return lastCharSize;
}
CFX_WideString CBC_C40Encoder::encodeToCodewords(CFX_WideString sb,
int32_t startPos) {
FX_WCHAR c1 = sb.GetAt(startPos);
FX_WCHAR c2 = sb.GetAt(startPos + 1);
FX_WCHAR c3 = sb.GetAt(startPos + 2);
int32_t v = (1600 * c1) + (40 * c2) + c3 + 1;
FX_WCHAR cw1 = (FX_WCHAR)(v / 256);
FX_WCHAR cw2 = (FX_WCHAR)(v % 256);
CFX_WideString b1(cw1);
CFX_WideString b2(cw2);
return b1 + b2;
}
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