| // 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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|
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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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| * 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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| */
|
|
|
| #include "../barcode.h"
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| #include "../BC_Dimension.h"
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| #include "BC_Encoder.h"
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| #include "BC_SymbolShapeHint.h"
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| #include "BC_SymbolInfo.h"
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| #include "BC_EncoderContext.h"
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| #include "BC_HighLevelEncoder.h"
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| #include "BC_Base256Encoder.h"
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| CBC_Base256Encoder::CBC_Base256Encoder()
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| {
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| }
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| CBC_Base256Encoder::~CBC_Base256Encoder()
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| {
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| }
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| FX_INT32 CBC_Base256Encoder::getEncodingMode()
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| {
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| return BASE256_ENCODATION;
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| }
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| void CBC_Base256Encoder::Encode(CBC_EncoderContext &context, FX_INT32 &e)
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| {
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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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| FX_INT32 newMode = CBC_HighLevelEncoder::lookAheadTest(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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| FX_INT32 dataCount = buffer.GetLength() - 1;
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| FX_CHAR buf[128];
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| #if defined(_FX_WINAPI_PARTITION_APP_)
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| memset(buf, 0, sizeof(FX_CHAR) * 128);
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| _itoa_s(dataCount, buf, 128, 10);
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| #else
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| FXSYS_itoa(dataCount, buf, 10);
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| #endif
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| buffer.SetAt(0, FX_WCHAR(*buf) - '0');
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| FX_INT32 lengthFieldSize = 1;
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| FX_INT32 currentSize = 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 (FX_INT32 i = 0, c = buffer.GetLength(); i < c; i++) {
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| context.writeCodeword(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, FX_INT32 codewordPosition)
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| {
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| FX_INT32 pseudoRandom = ((149 * codewordPosition) % 255) + 1;
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| FX_INT32 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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| }
|