// 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/datamatrix/BC_Base256Encoder.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_Base256Encoder::CBC_Base256Encoder() {}
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CBC_Base256Encoder::~CBC_Base256Encoder() {}
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int32_t CBC_Base256Encoder::getEncodingMode() {
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return BASE256_ENCODATION;
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}
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void CBC_Base256Encoder::Encode(CBC_EncoderContext& context, int32_t& e) {
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CFX_WideString buffer;
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buffer += (FX_WCHAR)'\0';
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while (context.hasMoreCharacters()) {
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FX_WCHAR c = context.getCurrentChar();
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buffer += c;
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context.m_pos++;
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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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int32_t dataCount = buffer.GetLength() - 1;
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FX_CHAR buf[128];
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FXSYS_itoa(dataCount, buf, 10);
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buffer.SetAt(0, FX_WCHAR(*buf) - '0');
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int32_t lengthFieldSize = 1;
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int32_t currentSize =
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context.getCodewordCount() + dataCount + lengthFieldSize;
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context.updateSymbolInfo(currentSize, e);
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if (e != BCExceptionNO) {
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return;
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}
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FX_BOOL mustPad = (context.m_symbolInfo->m_dataCapacity - currentSize) > 0;
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if (context.hasMoreCharacters() || mustPad) {
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if (dataCount <= 249) {
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buffer.SetAt(0, (FX_WCHAR)dataCount);
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} else if (dataCount > 249 && dataCount <= 1555) {
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buffer.SetAt(0, (FX_WCHAR)((dataCount / 250) + 249));
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buffer.Insert(1, (FX_WCHAR)(dataCount % 250));
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} else {
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e = BCExceptionIllegalStateMessageLengthInvalid;
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return;
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}
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}
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for (int32_t i = 0, c = buffer.GetLength(); i < c; i++) {
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context.writeCodeword(
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randomize255State(buffer.GetAt(i), context.getCodewordCount() + 1));
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}
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}
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FX_WCHAR CBC_Base256Encoder::randomize255State(FX_WCHAR ch,
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int32_t codewordPosition) {
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int32_t pseudoRandom = ((149 * codewordPosition) % 255) + 1;
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int32_t tempVariable = ch + pseudoRandom;
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if (tempVariable <= 255) {
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return (FX_WCHAR)tempVariable;
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} else {
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return (FX_WCHAR)(tempVariable - 256);
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}
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}
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