// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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// Original code is licensed as follows:
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/*
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* Copyright 2006-2007 Jeremias Maerki.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "xfa/fxbarcode/BC_Dimension.h"
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#include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
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#include "xfa/fxbarcode/datamatrix/BC_EdifactEncoder.h"
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#include "xfa/fxbarcode/datamatrix/BC_Encoder.h"
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#include "xfa/fxbarcode/datamatrix/BC_EncoderContext.h"
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#include "xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.h"
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#include "xfa/fxbarcode/datamatrix/BC_SymbolInfo.h"
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#include "xfa/fxbarcode/datamatrix/BC_SymbolShapeHint.h"
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CBC_EdifactEncoder::CBC_EdifactEncoder() {}
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CBC_EdifactEncoder::~CBC_EdifactEncoder() {}
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int32_t CBC_EdifactEncoder::getEncodingMode() {
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return EDIFACT_ENCODATION;
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}
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void CBC_EdifactEncoder::Encode(CBC_EncoderContext& context, int32_t& e) {
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CFX_WideString buffer;
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while (context.hasMoreCharacters()) {
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FX_WCHAR c = context.getCurrentChar();
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encodeChar(c, buffer, e);
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if (e != BCExceptionNO) {
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return;
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}
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context.m_pos++;
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int32_t count = buffer.GetLength();
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if (count >= 4) {
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context.writeCodewords(encodeToCodewords(buffer, 0, e));
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if (e != BCExceptionNO) {
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return;
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}
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buffer.Delete(0, 4);
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int32_t newMode = CBC_HighLevelEncoder::lookAheadTest(
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context.m_msg, context.m_pos, getEncodingMode());
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if (newMode != getEncodingMode()) {
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context.signalEncoderChange(ASCII_ENCODATION);
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break;
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}
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}
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}
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buffer += (FX_WCHAR)31;
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handleEOD(context, buffer, e);
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}
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void CBC_EdifactEncoder::handleEOD(CBC_EncoderContext& context,
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CFX_WideString buffer,
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int32_t& e) {
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int32_t count = buffer.GetLength();
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if (count == 0) {
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return;
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}
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if (count == 1) {
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context.updateSymbolInfo(e);
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if (e != BCExceptionNO) {
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return;
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}
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int32_t available =
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context.m_symbolInfo->m_dataCapacity - context.getCodewordCount();
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int32_t remaining = context.getRemainingCharacters();
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if (remaining == 0 && available <= 2) {
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return;
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}
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}
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if (count > 4) {
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e = BCExceptionIllegalStateCountMustNotExceed4;
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return;
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}
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int32_t restChars = count - 1;
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CFX_WideString encoded = encodeToCodewords(buffer, 0, e);
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if (e != BCExceptionNO) {
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return;
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}
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FX_BOOL endOfSymbolReached = !context.hasMoreCharacters();
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FX_BOOL restInAscii = endOfSymbolReached && restChars <= 2;
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if (restChars <= 2) {
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context.updateSymbolInfo(context.getCodewordCount() + restChars, e);
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if (e != BCExceptionNO) {
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return;
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}
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int32_t available =
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context.m_symbolInfo->m_dataCapacity - context.getCodewordCount();
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if (available >= 3) {
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restInAscii = FALSE;
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context.updateSymbolInfo(context.getCodewordCount() + encoded.GetLength(),
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e);
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if (e != BCExceptionNO) {
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return;
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}
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}
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}
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if (restInAscii) {
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context.resetSymbolInfo();
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context.m_pos -= restChars;
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} else {
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context.writeCodewords(encoded);
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}
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context.signalEncoderChange(ASCII_ENCODATION);
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}
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void CBC_EdifactEncoder::encodeChar(FX_WCHAR c,
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CFX_WideString& sb,
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int32_t& e) {
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if (c >= ' ' && c <= '?') {
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sb += c;
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} else if (c >= '@' && c <= '^') {
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sb += (FX_WCHAR)(c - 64);
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} else {
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CBC_HighLevelEncoder::illegalCharacter(c, e);
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}
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}
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CFX_WideString CBC_EdifactEncoder::encodeToCodewords(CFX_WideString sb,
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int32_t startPos,
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int32_t& e) {
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int32_t len = sb.GetLength() - startPos;
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if (len == 0) {
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e = BCExceptionNoContents;
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return CFX_WideString();
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}
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FX_WCHAR c1 = sb.GetAt(startPos);
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FX_WCHAR c2 = len >= 2 ? sb.GetAt(startPos + 1) : 0;
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FX_WCHAR c3 = len >= 3 ? sb.GetAt(startPos + 2) : 0;
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FX_WCHAR c4 = len >= 4 ? sb.GetAt(startPos + 3) : 0;
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int32_t v = (c1 << 18) + (c2 << 12) + (c3 << 6) + c4;
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FX_WCHAR cw1 = (FX_WCHAR)((v >> 16) & 255);
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FX_WCHAR cw2 = (FX_WCHAR)((v >> 8) & 255);
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FX_WCHAR cw3 = (FX_WCHAR)(v & 255);
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CFX_WideString res;
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res += cw1;
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if (len >= 2) {
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res += cw2;
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}
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if (len >= 3) {
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res += cw3;
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}
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return res;
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}
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