1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 // Original code is licensed as follows:
7 /*
8 * Copyright 2006-2007 Jeremias Maerki.
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 */
22
23 #include "fxbarcode/datamatrix/BC_Base256Encoder.h"
24
25 #include "fxbarcode/datamatrix/BC_Encoder.h"
26 #include "fxbarcode/datamatrix/BC_EncoderContext.h"
27 #include "fxbarcode/datamatrix/BC_HighLevelEncoder.h"
28 #include "fxbarcode/datamatrix/BC_SymbolInfo.h"
29 #include "fxbarcode/utils.h"
30
CBC_Base256Encoder()31 CBC_Base256Encoder::CBC_Base256Encoder() {}
~CBC_Base256Encoder()32 CBC_Base256Encoder::~CBC_Base256Encoder() {}
getEncodingMode()33 int32_t CBC_Base256Encoder::getEncodingMode() {
34 return BASE256_ENCODATION;
35 }
Encode(CBC_EncoderContext & context,int32_t & e)36 void CBC_Base256Encoder::Encode(CBC_EncoderContext& context, int32_t& e) {
37 WideString buffer;
38 buffer += L'\0';
39 while (context.hasMoreCharacters()) {
40 wchar_t c = context.getCurrentChar();
41 buffer += c;
42 context.m_pos++;
43 int32_t newMode = CBC_HighLevelEncoder::lookAheadTest(
44 context.m_msg, context.m_pos, getEncodingMode());
45 if (newMode != getEncodingMode()) {
46 context.signalEncoderChange(newMode);
47 break;
48 }
49 }
50 int32_t dataCount = buffer.GetLength() - 1;
51 char buf[128];
52 FXSYS_itoa(dataCount, buf, 10);
53 buffer.SetAt(0, static_cast<wchar_t>(*buf) - '0');
54 int32_t lengthFieldSize = 1;
55 int32_t currentSize =
56 context.getCodewordCount() + dataCount + lengthFieldSize;
57 context.updateSymbolInfo(currentSize, e);
58 if (e != BCExceptionNO) {
59 return;
60 }
61 bool mustPad = (context.m_symbolInfo->dataCapacity() - currentSize) > 0;
62 if (context.hasMoreCharacters() || mustPad) {
63 if (dataCount <= 249) {
64 buffer.SetAt(0, static_cast<wchar_t>(dataCount));
65 } else if (dataCount > 249 && dataCount <= 1555) {
66 buffer.SetAt(0, static_cast<wchar_t>((dataCount / 250) + 249));
67 buffer.Insert(1, static_cast<wchar_t>(dataCount % 250));
68 } else {
69 e = BCExceptionIllegalStateMessageLengthInvalid;
70 return;
71 }
72 }
73 for (const auto& c : buffer) {
74 context.writeCodeword(randomize255State(c, context.getCodewordCount() + 1));
75 }
76 }
randomize255State(wchar_t ch,int32_t codewordPosition)77 wchar_t CBC_Base256Encoder::randomize255State(wchar_t ch,
78 int32_t codewordPosition) {
79 int32_t pseudoRandom = ((149 * codewordPosition) % 255) + 1;
80 int32_t tempVariable = ch + pseudoRandom;
81 if (tempVariable <= 255) {
82 return static_cast<wchar_t>(tempVariable);
83 } else {
84 return static_cast<wchar_t>(tempVariable - 256);
85 }
86 }
87