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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_EdifactEncoder.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_EdifactEncoder::CBC_EdifactEncoder() {}
CBC_EdifactEncoder::~CBC_EdifactEncoder() {}
int32_t CBC_EdifactEncoder::getEncodingMode() {
return EDIFACT_ENCODATION;
}
void CBC_EdifactEncoder::Encode(CBC_EncoderContext& context, int32_t& e) {
CFX_WideString buffer;
while (context.hasMoreCharacters()) {
FX_WCHAR c = context.getCurrentChar();
encodeChar(c, buffer, e);
if (e != BCExceptionNO) {
return;
}
context.m_pos++;
int32_t count = buffer.GetLength();
if (count >= 4) {
context.writeCodewords(encodeToCodewords(buffer, 0, e));
if (e != BCExceptionNO) {
return;
}
buffer.Delete(0, 4);
int32_t 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,
int32_t& e) {
int32_t count = buffer.GetLength();
if (count == 0) {
return;
}
if (count == 1) {
context.updateSymbolInfo(e);
if (e != BCExceptionNO) {
return;
}
int32_t available =
context.m_symbolInfo->m_dataCapacity - context.getCodewordCount();
int32_t remaining = context.getRemainingCharacters();
if (remaining == 0 && available <= 2) {
return;
}
}
if (count > 4) {
e = BCExceptionIllegalStateCountMustNotExceed4;
return;
}
int32_t restChars = count - 1;
CFX_WideString encoded = encodeToCodewords(buffer, 0, e);
if (e != BCExceptionNO) {
return;
}
bool endOfSymbolReached = !context.hasMoreCharacters();
bool restInAscii = endOfSymbolReached && restChars <= 2;
if (restChars <= 2) {
context.updateSymbolInfo(context.getCodewordCount() + restChars, e);
if (e != BCExceptionNO) {
return;
}
int32_t 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,
int32_t& 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,
int32_t startPos,
int32_t& e) {
int32_t len = sb.GetLength() - startPos;
if (len == 0) {
e = BCExceptionNoContents;
return CFX_WideString();
}
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;
int32_t 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;
}
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