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 2010 ZXing authors
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/oned/BC_OnedCode128Writer.h"
24 
25 #include <cctype>
26 #include <memory>
27 
28 #include "fxbarcode/BC_Writer.h"
29 #include "fxbarcode/oned/BC_OneDimWriter.h"
30 
31 namespace {
32 
33 constexpr size_t kPatternSize = 7;
34 
35 const int8_t CODE_PATTERNS[107][kPatternSize] = {
36     {2, 1, 2, 2, 2, 2, 0}, {2, 2, 2, 1, 2, 2, 0}, {2, 2, 2, 2, 2, 1, 0},
37     {1, 2, 1, 2, 2, 3, 0}, {1, 2, 1, 3, 2, 2, 0}, {1, 3, 1, 2, 2, 2, 0},
38     {1, 2, 2, 2, 1, 3, 0}, {1, 2, 2, 3, 1, 2, 0}, {1, 3, 2, 2, 1, 2, 0},
39     {2, 2, 1, 2, 1, 3, 0}, {2, 2, 1, 3, 1, 2, 0}, {2, 3, 1, 2, 1, 2, 0},
40     {1, 1, 2, 2, 3, 2, 0}, {1, 2, 2, 1, 3, 2, 0}, {1, 2, 2, 2, 3, 1, 0},
41     {1, 1, 3, 2, 2, 2, 0}, {1, 2, 3, 1, 2, 2, 0}, {1, 2, 3, 2, 2, 1, 0},
42     {2, 2, 3, 2, 1, 1, 0}, {2, 2, 1, 1, 3, 2, 0}, {2, 2, 1, 2, 3, 1, 0},
43     {2, 1, 3, 2, 1, 2, 0}, {2, 2, 3, 1, 1, 2, 0}, {3, 1, 2, 1, 3, 1, 0},
44     {3, 1, 1, 2, 2, 2, 0}, {3, 2, 1, 1, 2, 2, 0}, {3, 2, 1, 2, 2, 1, 0},
45     {3, 1, 2, 2, 1, 2, 0}, {3, 2, 2, 1, 1, 2, 0}, {3, 2, 2, 2, 1, 1, 0},
46     {2, 1, 2, 1, 2, 3, 0}, {2, 1, 2, 3, 2, 1, 0}, {2, 3, 2, 1, 2, 1, 0},
47     {1, 1, 1, 3, 2, 3, 0}, {1, 3, 1, 1, 2, 3, 0}, {1, 3, 1, 3, 2, 1, 0},
48     {1, 1, 2, 3, 1, 3, 0}, {1, 3, 2, 1, 1, 3, 0}, {1, 3, 2, 3, 1, 1, 0},
49     {2, 1, 1, 3, 1, 3, 0}, {2, 3, 1, 1, 1, 3, 0}, {2, 3, 1, 3, 1, 1, 0},
50     {1, 1, 2, 1, 3, 3, 0}, {1, 1, 2, 3, 3, 1, 0}, {1, 3, 2, 1, 3, 1, 0},
51     {1, 1, 3, 1, 2, 3, 0}, {1, 1, 3, 3, 2, 1, 0}, {1, 3, 3, 1, 2, 1, 0},
52     {3, 1, 3, 1, 2, 1, 0}, {2, 1, 1, 3, 3, 1, 0}, {2, 3, 1, 1, 3, 1, 0},
53     {2, 1, 3, 1, 1, 3, 0}, {2, 1, 3, 3, 1, 1, 0}, {2, 1, 3, 1, 3, 1, 0},
54     {3, 1, 1, 1, 2, 3, 0}, {3, 1, 1, 3, 2, 1, 0}, {3, 3, 1, 1, 2, 1, 0},
55     {3, 1, 2, 1, 1, 3, 0}, {3, 1, 2, 3, 1, 1, 0}, {3, 3, 2, 1, 1, 1, 0},
56     {3, 1, 4, 1, 1, 1, 0}, {2, 2, 1, 4, 1, 1, 0}, {4, 3, 1, 1, 1, 1, 0},
57     {1, 1, 1, 2, 2, 4, 0}, {1, 1, 1, 4, 2, 2, 0}, {1, 2, 1, 1, 2, 4, 0},
58     {1, 2, 1, 4, 2, 1, 0}, {1, 4, 1, 1, 2, 2, 0}, {1, 4, 1, 2, 2, 1, 0},
59     {1, 1, 2, 2, 1, 4, 0}, {1, 1, 2, 4, 1, 2, 0}, {1, 2, 2, 1, 1, 4, 0},
60     {1, 2, 2, 4, 1, 1, 0}, {1, 4, 2, 1, 1, 2, 0}, {1, 4, 2, 2, 1, 1, 0},
61     {2, 4, 1, 2, 1, 1, 0}, {2, 2, 1, 1, 1, 4, 0}, {4, 1, 3, 1, 1, 1, 0},
62     {2, 4, 1, 1, 1, 2, 0}, {1, 3, 4, 1, 1, 1, 0}, {1, 1, 1, 2, 4, 2, 0},
63     {1, 2, 1, 1, 4, 2, 0}, {1, 2, 1, 2, 4, 1, 0}, {1, 1, 4, 2, 1, 2, 0},
64     {1, 2, 4, 1, 1, 2, 0}, {1, 2, 4, 2, 1, 1, 0}, {4, 1, 1, 2, 1, 2, 0},
65     {4, 2, 1, 1, 1, 2, 0}, {4, 2, 1, 2, 1, 1, 0}, {2, 1, 2, 1, 4, 1, 0},
66     {2, 1, 4, 1, 2, 1, 0}, {4, 1, 2, 1, 2, 1, 0}, {1, 1, 1, 1, 4, 3, 0},
67     {1, 1, 1, 3, 4, 1, 0}, {1, 3, 1, 1, 4, 1, 0}, {1, 1, 4, 1, 1, 3, 0},
68     {1, 1, 4, 3, 1, 1, 0}, {4, 1, 1, 1, 1, 3, 0}, {4, 1, 1, 3, 1, 1, 0},
69     {1, 1, 3, 1, 4, 1, 0}, {1, 1, 4, 1, 3, 1, 0}, {3, 1, 1, 1, 4, 1, 0},
70     {4, 1, 1, 1, 3, 1, 0}, {2, 1, 1, 4, 1, 2, 0}, {2, 1, 1, 2, 1, 4, 0},
71     {2, 1, 1, 2, 3, 2, 0}, {2, 3, 3, 1, 1, 1, 2}};
72 
73 const int32_t CODE_START_B = 104;
74 const int32_t CODE_START_C = 105;
75 const int32_t CODE_STOP = 106;
76 
77 }  // namespace
78 
CBC_OnedCode128Writer(BC_TYPE type)79 CBC_OnedCode128Writer::CBC_OnedCode128Writer(BC_TYPE type)
80     : m_codeFormat(type) {
81   assert(m_codeFormat == BC_CODE128_B || m_codeFormat == BC_CODE128_C);
82 }
83 
~CBC_OnedCode128Writer()84 CBC_OnedCode128Writer::~CBC_OnedCode128Writer() {}
85 
CheckContentValidity(const WideStringView & contents)86 bool CBC_OnedCode128Writer::CheckContentValidity(
87     const WideStringView& contents) {
88   for (const auto& ch : contents) {
89     int32_t patternIndex = static_cast<int32_t>(ch);
90     if (patternIndex < 32 || patternIndex > 126 || patternIndex == 34)
91       return false;
92   }
93   return true;
94 }
95 
FilterContents(const WideStringView & contents)96 WideString CBC_OnedCode128Writer::FilterContents(
97     const WideStringView& contents) {
98   WideString filterChineseChar;
99   for (size_t i = 0; i < contents.GetLength(); i++) {
100     wchar_t ch = contents[i];
101     if (ch > 175) {
102       i++;
103       continue;
104     }
105     filterChineseChar += ch;
106   }
107   const wchar_t limit = m_codeFormat == BC_CODE128_B ? 126 : 106;
108   WideString filtercontents;
109   for (const auto& ch : filterChineseChar) {
110     if (ch >= 32 && ch <= limit)
111       filtercontents += ch;
112   }
113   return filtercontents;
114 }
115 
SetTextLocation(BC_TEXT_LOC location)116 bool CBC_OnedCode128Writer::SetTextLocation(BC_TEXT_LOC location) {
117   if (location < BC_TEXT_LOC_NONE || location > BC_TEXT_LOC_BELOWEMBED) {
118     return false;
119   }
120   m_locTextLoc = location;
121   return true;
122 }
123 
EncodeWithHint(const ByteString & contents,BCFORMAT format,int32_t & outWidth,int32_t & outHeight,int32_t hints)124 uint8_t* CBC_OnedCode128Writer::EncodeWithHint(const ByteString& contents,
125                                                BCFORMAT format,
126                                                int32_t& outWidth,
127                                                int32_t& outHeight,
128                                                int32_t hints) {
129   if (format != BCFORMAT_CODE_128)
130     return nullptr;
131   return CBC_OneDimWriter::EncodeWithHint(contents, format, outWidth, outHeight,
132                                           hints);
133 }
134 
EncodeImpl(const ByteString & contents,int32_t & outLength)135 uint8_t* CBC_OnedCode128Writer::EncodeImpl(const ByteString& contents,
136                                            int32_t& outLength) {
137   if (contents.GetLength() < 1 || contents.GetLength() > 80)
138     return nullptr;
139 
140   std::vector<int32_t> patterns;
141   int32_t checkSum = 0;
142   if (m_codeFormat == BC_CODE128_B)
143     checkSum = Encode128B(contents, &patterns);
144   else
145     checkSum = Encode128C(contents, &patterns);
146 
147   checkSum %= 103;
148   patterns.push_back(checkSum);
149   patterns.push_back(CODE_STOP);
150   m_iContentLen = contents.GetLength() + 3;
151   int32_t codeWidth = 0;
152   for (const auto& patternIndex : patterns) {
153     const int8_t* pattern = CODE_PATTERNS[patternIndex];
154     for (size_t i = 0; i < kPatternSize; ++i)
155       codeWidth += pattern[i];
156   }
157   outLength = codeWidth;
158   std::unique_ptr<uint8_t, FxFreeDeleter> result(FX_Alloc(uint8_t, outLength));
159   int32_t pos = 0;
160   for (size_t i = 0; i < patterns.size(); ++i) {
161     const int8_t* pattern = CODE_PATTERNS[patterns[i]];
162     int32_t e = BCExceptionNO;
163     pos += AppendPattern(result.get(), pos, pattern, kPatternSize, 1, e);
164     if (e != BCExceptionNO)
165       return nullptr;
166   }
167   return result.release();
168 }
169 
170 // static
Encode128B(const ByteString & contents,std::vector<int32_t> * patterns)171 int32_t CBC_OnedCode128Writer::Encode128B(const ByteString& contents,
172                                           std::vector<int32_t>* patterns) {
173   int32_t checkWeight = 1;
174   patterns->push_back(CODE_START_B);
175   int32_t checkSum = CODE_START_B * checkWeight;
176   for (size_t position = 0; position < contents.GetLength(); position++) {
177     int32_t patternIndex = contents[position] - ' ';
178     patterns->push_back(patternIndex);
179     checkSum += patternIndex * checkWeight++;
180   }
181   return checkSum;
182 }
183 
184 // static
Encode128C(const ByteString & contents,std::vector<int32_t> * patterns)185 int32_t CBC_OnedCode128Writer::Encode128C(const ByteString& contents,
186                                           std::vector<int32_t>* patterns) {
187   int32_t checkWeight = 1;
188   patterns->push_back(CODE_START_C);
189   int32_t checkSum = CODE_START_C * checkWeight;
190   size_t position = 0;
191   while (position < contents.GetLength()) {
192     int32_t patternIndex;
193     char ch = contents[position];
194     if (std::isdigit(ch)) {
195       patternIndex = FXSYS_atoi(
196           contents.Mid(position, contents.IsValidIndex(position + 1) ? 2 : 1)
197               .c_str());
198       ++position;
199       if (position < contents.GetLength() && std::isdigit(contents[position]))
200         ++position;
201     } else {
202       patternIndex = static_cast<int32_t>(ch);
203       ++position;
204     }
205     patterns->push_back(patternIndex);
206     checkSum += patternIndex * checkWeight++;
207   }
208   return checkSum;
209 }
210