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 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 "xfa/fxbarcode/datamatrix/BC_Encoder.h"
24 #include "xfa/fxbarcode/datamatrix/BC_ErrorCorrection.h"
25 #include "xfa/fxbarcode/datamatrix/BC_SymbolInfo.h"
26 #include "xfa/fxbarcode/datamatrix/BC_SymbolShapeHint.h"
27
28 namespace {
29
30 const uint8_t FACTOR_SETS[] = {5, 7, 10, 11, 12, 14, 18, 20,
31 24, 28, 36, 42, 48, 56, 62, 68};
32
33 const uint8_t FACTORS_0[5] = {228, 48, 15, 111, 62};
34 const uint8_t FACTORS_1[7] = {23, 68, 144, 134, 240, 92, 254};
35 const uint8_t FACTORS_2[10] = {28, 24, 185, 166, 223, 248, 116, 255, 110, 61};
36 const uint8_t FACTORS_3[11] = {175, 138, 205, 12, 194, 168,
37 39, 245, 60, 97, 120};
38
39 const uint8_t FACTORS_4[12] = {41, 153, 158, 91, 61, 42,
40 142, 213, 97, 178, 100, 242};
41
42 const uint8_t FACTORS_5[14] = {156, 97, 192, 252, 95, 9, 157,
43 119, 138, 45, 18, 186, 83, 185};
44
45 const uint8_t FACTORS_6[18] = {83, 195, 100, 39, 188, 75, 66, 61, 241,
46 213, 109, 129, 94, 254, 225, 48, 90, 188};
47
48 const uint8_t FACTORS_7[20] = {15, 195, 244, 9, 233, 71, 168, 2, 188, 160,
49 153, 145, 253, 79, 108, 82, 27, 174, 186, 172};
50
51 const uint8_t FACTORS_8[24] = {52, 190, 88, 205, 109, 39, 176, 21,
52 155, 197, 251, 223, 155, 21, 5, 172,
53 254, 124, 12, 181, 184, 96, 50, 193};
54
55 const uint8_t FACTORS_9[28] = {211, 231, 43, 97, 71, 96, 103, 174, 37, 151,
56 170, 53, 75, 34, 249, 121, 17, 138, 110, 213,
57 141, 136, 120, 151, 233, 168, 93, 255};
58
59 const uint8_t FACTORS_10[36] = {245, 127, 242, 218, 130, 250, 162, 181, 102,
60 120, 84, 179, 220, 251, 80, 182, 229, 18,
61 2, 4, 68, 33, 101, 137, 95, 119, 115,
62 44, 175, 184, 59, 25, 225, 98, 81, 112};
63
64 const uint8_t FACTORS_11[42] = {
65 77, 193, 137, 31, 19, 38, 22, 153, 247, 105, 122, 2, 245, 133,
66 242, 8, 175, 95, 100, 9, 167, 105, 214, 111, 57, 121, 21, 1,
67 253, 57, 54, 101, 248, 202, 69, 50, 150, 177, 226, 5, 9, 5};
68
69 const uint8_t FACTORS_12[48] = {
70 245, 132, 172, 223, 96, 32, 117, 22, 238, 133, 238, 231,
71 205, 188, 237, 87, 191, 106, 16, 147, 118, 23, 37, 90,
72 170, 205, 131, 88, 120, 100, 66, 138, 186, 240, 82, 44,
73 176, 87, 187, 147, 160, 175, 69, 213, 92, 253, 225, 19};
74
75 const uint8_t FACTORS_13[56] = {
76 175, 9, 223, 238, 12, 17, 220, 208, 100, 29, 175, 170, 230, 192,
77 215, 235, 150, 159, 36, 223, 38, 200, 132, 54, 228, 146, 218, 234,
78 117, 203, 29, 232, 144, 238, 22, 150, 201, 117, 62, 207, 164, 13,
79 137, 245, 127, 67, 247, 28, 155, 43, 203, 107, 233, 53, 143, 46};
80
81 const uint8_t FACTORS_14[62] = {
82 242, 93, 169, 50, 144, 210, 39, 118, 202, 188, 201, 189, 143,
83 108, 196, 37, 185, 112, 134, 230, 245, 63, 197, 190, 250, 106,
84 185, 221, 175, 64, 114, 71, 161, 44, 147, 6, 27, 218, 51,
85 63, 87, 10, 40, 130, 188, 17, 163, 31, 176, 170, 4, 107,
86 232, 7, 94, 166, 224, 124, 86, 47, 11, 204};
87
88 const uint8_t FACTORS_15[68] = {
89 220, 228, 173, 89, 251, 149, 159, 56, 89, 33, 147, 244, 154, 36,
90 73, 127, 213, 136, 248, 180, 234, 197, 158, 177, 68, 122, 93, 213,
91 15, 160, 227, 236, 66, 139, 153, 185, 202, 167, 179, 25, 220, 232,
92 96, 210, 231, 136, 223, 239, 181, 241, 59, 52, 172, 25, 49, 232,
93 211, 189, 64, 54, 108, 153, 132, 63, 96, 103, 82, 186};
94
95 const uint8_t* const FACTORS[16] = {
96 FACTORS_0, FACTORS_1, FACTORS_2, FACTORS_3, FACTORS_4, FACTORS_5,
97 FACTORS_6, FACTORS_7, FACTORS_8, FACTORS_9, FACTORS_10, FACTORS_11,
98 FACTORS_12, FACTORS_13, FACTORS_14, FACTORS_15};
99
100 } // namespace
101
102 int32_t CBC_ErrorCorrection::MODULO_VALUE = 0x12D;
103 int32_t CBC_ErrorCorrection::LOG[256] = {0};
104 int32_t CBC_ErrorCorrection::ALOG[256] = {0};
Initialize()105 void CBC_ErrorCorrection::Initialize() {
106 int32_t p = 1;
107 for (int32_t i = 0; i < 255; i++) {
108 ALOG[i] = p;
109 LOG[p] = i;
110 p <<= 1;
111 if (p >= 256) {
112 p ^= MODULO_VALUE;
113 }
114 }
115 }
Finalize()116 void CBC_ErrorCorrection::Finalize() {}
CBC_ErrorCorrection()117 CBC_ErrorCorrection::CBC_ErrorCorrection() {}
~CBC_ErrorCorrection()118 CBC_ErrorCorrection::~CBC_ErrorCorrection() {}
encodeECC200(CFX_WideString codewords,CBC_SymbolInfo * symbolInfo,int32_t & e)119 CFX_WideString CBC_ErrorCorrection::encodeECC200(CFX_WideString codewords,
120 CBC_SymbolInfo* symbolInfo,
121 int32_t& e) {
122 if (codewords.GetLength() != symbolInfo->m_dataCapacity) {
123 e = BCExceptionIllegalArgument;
124 return CFX_WideString();
125 }
126 CFX_WideString sb;
127 sb += codewords;
128 int32_t blockCount = symbolInfo->getInterleavedBlockCount();
129 if (blockCount == 1) {
130 CFX_WideString ecc =
131 createECCBlock(codewords, symbolInfo->m_errorCodewords, e);
132 if (e != BCExceptionNO)
133 return CFX_WideString();
134 sb += ecc;
135 } else {
136 CFX_ArrayTemplate<int32_t> dataSizes;
137 dataSizes.SetSize(blockCount);
138 CFX_ArrayTemplate<int32_t> errorSizes;
139 errorSizes.SetSize(blockCount);
140 CFX_ArrayTemplate<int32_t> startPos;
141 startPos.SetSize(blockCount);
142 for (int32_t i = 0; i < blockCount; i++) {
143 dataSizes[i] = symbolInfo->getDataLengthForInterleavedBlock(i + 1);
144 errorSizes[i] = symbolInfo->getErrorLengthForInterleavedBlock(i + 1);
145 startPos[i] = 0;
146 if (i > 0) {
147 startPos[i] = startPos[i - 1] + dataSizes[i];
148 }
149 }
150 for (int32_t block = 0; block < blockCount; block++) {
151 CFX_WideString temp;
152 for (int32_t d = block; d < symbolInfo->m_dataCapacity; d += blockCount) {
153 temp += (FX_WCHAR)codewords.GetAt(d);
154 }
155 CFX_WideString ecc = createECCBlock(temp, errorSizes[block], e);
156 if (e != BCExceptionNO)
157 return CFX_WideString();
158 int32_t pos = 0;
159 for (int32_t l = block; l < errorSizes[block] * blockCount;
160 l += blockCount) {
161 sb.SetAt(symbolInfo->m_dataCapacity + l, ecc.GetAt(pos++));
162 }
163 }
164 }
165 return sb;
166 }
createECCBlock(CFX_WideString codewords,int32_t numECWords,int32_t & e)167 CFX_WideString CBC_ErrorCorrection::createECCBlock(CFX_WideString codewords,
168 int32_t numECWords,
169 int32_t& e) {
170 return createECCBlock(codewords, 0, codewords.GetLength(), numECWords, e);
171 }
createECCBlock(CFX_WideString codewords,int32_t start,int32_t len,int32_t numECWords,int32_t & e)172 CFX_WideString CBC_ErrorCorrection::createECCBlock(CFX_WideString codewords,
173 int32_t start,
174 int32_t len,
175 int32_t numECWords,
176 int32_t& e) {
177 static const size_t kFactorTableNum = sizeof(FACTOR_SETS) / sizeof(int32_t);
178 size_t table = 0;
179 while (table < kFactorTableNum && FACTOR_SETS[table] != numECWords)
180 table++;
181
182 if (table >= kFactorTableNum) {
183 e = BCExceptionIllegalArgument;
184 return CFX_WideString();
185 }
186 uint16_t* ecc = FX_Alloc(uint16_t, numECWords);
187 FXSYS_memset(ecc, 0, numECWords * sizeof(uint16_t));
188 for (int32_t l = start; l < start + len; l++) {
189 uint16_t m = ecc[numECWords - 1] ^ codewords.GetAt(l);
190 for (int32_t k = numECWords - 1; k > 0; k--) {
191 if (m != 0 && FACTORS[table][k] != 0) {
192 ecc[k] = (uint16_t)(ecc[k - 1] ^
193 ALOG[(LOG[m] + LOG[FACTORS[table][k]]) % 255]);
194 } else {
195 ecc[k] = ecc[k - 1];
196 }
197 }
198 if (m != 0 && FACTORS[table][0] != 0) {
199 ecc[0] = (uint16_t)ALOG[(LOG[m] + LOG[FACTORS[table][0]]) % 255];
200 } else {
201 ecc[0] = 0;
202 }
203 }
204 CFX_WideString strecc;
205 for (int32_t j = 0; j < numECWords; j++) {
206 strecc += (FX_WCHAR)ecc[numECWords - j - 1];
207 }
208 FX_Free(ecc);
209 return strecc;
210 }
211