// 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 "../common/BC_CommonBitMatrix.h" | |
#include "BC_Encoder.h" | |
#include "BC_SymbolShapeHint.h" | |
#include "BC_SymbolInfo.h" | |
#include "BC_EncoderContext.h" | |
#include "BC_HighLevelEncoder.h" | |
#include "BC_C40Encoder.h" | |
CBC_C40Encoder::CBC_C40Encoder() | |
{ | |
} | |
CBC_C40Encoder::~CBC_C40Encoder() | |
{ | |
} | |
FX_INT32 CBC_C40Encoder::getEncodingMode() | |
{ | |
return C40_ENCODATION; | |
} | |
void CBC_C40Encoder::Encode(CBC_EncoderContext &context, FX_INT32 &e) | |
{ | |
CFX_WideString buffer; | |
while (context.hasMoreCharacters()) { | |
FX_WCHAR c = context.getCurrentChar(); | |
context.m_pos++; | |
FX_INT32 lastCharSize = encodeChar(c, buffer, e); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
FX_INT32 unwritten = (buffer.GetLength() / 3) * 2; | |
FX_INT32 curCodewordCount = context.getCodewordCount() + unwritten; | |
context.updateSymbolInfo(curCodewordCount, e); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
FX_INT32 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; | |
} | |
FX_INT32 count = buffer.GetLength(); | |
if ((count % 3) == 0) { | |
FX_INT32 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, FX_INT32 &e) | |
{ | |
FX_INT32 unwritten = (buffer.GetLength() / 3) * 2; | |
FX_INT32 rest = buffer.GetLength() % 3; | |
FX_INT32 curCodewordCount = context.getCodewordCount() + unwritten; | |
context.updateSymbolInfo(curCodewordCount, e); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
FX_INT32 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); | |
} | |
FX_INT32 CBC_C40Encoder::encodeChar(FX_WCHAR c, CFX_WideString &sb, FX_INT32 &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 >= '\0') && (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; | |
FX_INT32 len = 2; | |
len += encodeChar((c - 128), sb, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
return len; | |
} else { | |
e = BCExceptionIllegalArgument; | |
return 0; | |
} | |
} | |
FX_INT32 CBC_C40Encoder::backtrackOneCharacter(CBC_EncoderContext &context, CFX_WideString &buffer, CFX_WideString &removed, FX_INT32 lastCharSize, FX_INT32 &e) | |
{ | |
FX_INT32 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, FX_INT32 startPos) | |
{ | |
FX_WCHAR c1 = sb.GetAt(startPos); | |
FX_WCHAR c2 = sb.GetAt(startPos + 1); | |
FX_WCHAR c3 = sb.GetAt(startPos + 2); | |
FX_INT32 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; | |
} |