// 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 "../common/BC_CommonBitMatrix.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_EdifactEncoder.h" | |
CBC_EdifactEncoder::CBC_EdifactEncoder() | |
{ | |
} | |
CBC_EdifactEncoder::~CBC_EdifactEncoder() | |
{ | |
} | |
FX_INT32 CBC_EdifactEncoder::getEncodingMode() | |
{ | |
return EDIFACT_ENCODATION; | |
} | |
void CBC_EdifactEncoder::Encode(CBC_EncoderContext &context, FX_INT32 &e) | |
{ | |
CFX_WideString buffer; | |
while (context.hasMoreCharacters()) { | |
FX_WCHAR c = context.getCurrentChar(); | |
encodeChar(c, buffer, e); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
context.m_pos++; | |
FX_INT32 count = buffer.GetLength(); | |
if (count >= 4) { | |
context.writeCodewords(encodeToCodewords(buffer, 0, e)); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
buffer.Delete(0, 4); | |
FX_INT32 newMode = CBC_HighLevelEncoder::lookAheadTest(context.m_msg, context.m_pos, getEncodingMode()); | |
if (newMode != getEncodingMode()) { | |
context.signalEncoderChange(ASCII_ENCODATION); | |
break; | |
} | |
} | |
} | |
buffer += (FX_WCHAR)31; | |
handleEOD(context, buffer, e); | |
} | |
void CBC_EdifactEncoder::handleEOD(CBC_EncoderContext &context, CFX_WideString buffer, FX_INT32 &e) | |
{ | |
FX_INT32 count = buffer.GetLength(); | |
if (count == 0) { | |
return; | |
} | |
if (count == 1) { | |
context.updateSymbolInfo(e); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
FX_INT32 available = context.m_symbolInfo->m_dataCapacity - context.getCodewordCount(); | |
FX_INT32 remaining = context.getRemainingCharacters(); | |
if (remaining == 0 && available <= 2) { | |
return; | |
} | |
} | |
if (count > 4) { | |
e = BCExceptionIllegalStateCountMustNotExceed4; | |
return; | |
} | |
FX_INT32 restChars = count - 1; | |
CFX_WideString encoded = encodeToCodewords(buffer, 0, e); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
FX_BOOL endOfSymbolReached = !context.hasMoreCharacters(); | |
FX_BOOL restInAscii = endOfSymbolReached && restChars <= 2; | |
if (restChars <= 2) { | |
context.updateSymbolInfo(context.getCodewordCount() + restChars, e); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
FX_INT32 available = context.m_symbolInfo->m_dataCapacity - context.getCodewordCount(); | |
if (available >= 3) { | |
restInAscii = FALSE; | |
context.updateSymbolInfo(context.getCodewordCount() + encoded.GetLength(), e); | |
if (e != BCExceptionNO) { | |
return; | |
} | |
} | |
} | |
if (restInAscii) { | |
context.resetSymbolInfo(); | |
context.m_pos -= restChars; | |
} else { | |
context.writeCodewords(encoded); | |
} | |
context.signalEncoderChange(ASCII_ENCODATION); | |
} | |
void CBC_EdifactEncoder::encodeChar(FX_WCHAR c, CFX_WideString &sb, FX_INT32 &e) | |
{ | |
if (c >= ' ' && c <= '?') { | |
sb += c; | |
} else if (c >= '@' && c <= '^') { | |
sb += (FX_WCHAR)(c - 64); | |
} else { | |
CBC_HighLevelEncoder::illegalCharacter(c, e); | |
} | |
} | |
CFX_WideString CBC_EdifactEncoder::encodeToCodewords(CFX_WideString sb, FX_INT32 startPos, FX_INT32 &e) | |
{ | |
FX_INT32 len = sb.GetLength() - startPos; | |
if (len == 0) { | |
e = BCExceptionNoContents; | |
return (FX_LPWSTR)""; | |
} | |
FX_WCHAR c1 = sb.GetAt(startPos); | |
FX_WCHAR c2 = len >= 2 ? sb.GetAt(startPos + 1) : 0; | |
FX_WCHAR c3 = len >= 3 ? sb.GetAt(startPos + 2) : 0; | |
FX_WCHAR c4 = len >= 4 ? sb.GetAt(startPos + 3) : 0; | |
FX_INT32 v = (c1 << 18) + (c2 << 12) + (c3 << 6) + c4; | |
FX_WCHAR cw1 = (FX_WCHAR) ((v >> 16) & 255); | |
FX_WCHAR cw2 = (FX_WCHAR) ((v >> 8) & 255); | |
FX_WCHAR cw3 = (FX_WCHAR) (v & 255); | |
CFX_WideString res; | |
res += cw1; | |
if (len >= 2) { | |
res += cw2; | |
} | |
if (len >= 3) { | |
res += cw3; | |
} | |
return res; | |
} |