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