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/src/fxbarcode/barcode.h"
24 #include "BC_Encoder.h"
25 #include "BC_SymbolShapeHint.h"
26 #include "BC_SymbolInfo.h"
27 #include "BC_ErrorCorrection.h"
28 int32_t CBC_ErrorCorrection::FACTOR_SETS[] = {5, 7, 10, 11, 12, 14, 18, 20,
29 24, 28, 36, 42, 48, 56, 62, 68};
30 int32_t CBC_ErrorCorrection::FACTORS[][100] = {
31 {228, 48, 15, 111, 62},
32 {23, 68, 144, 134, 240, 92, 254},
33 {28, 24, 185, 166, 223, 248, 116, 255, 110, 61},
34 {175, 138, 205, 12, 194, 168, 39, 245, 60, 97, 120},
35 {41, 153, 158, 91, 61, 42, 142, 213, 97, 178, 100, 242},
36 {156, 97, 192, 252, 95, 9, 157, 119, 138, 45, 18, 186, 83, 185},
37 {83, 195, 100, 39, 188, 75, 66, 61, 241, 213, 109, 129, 94, 254, 225, 48,
38 90, 188},
39 {15, 195, 244, 9, 233, 71, 168, 2, 188, 160, 153, 145, 253, 79, 108, 82, 27,
40 174, 186, 172},
41 {52, 190, 88, 205, 109, 39, 176, 21, 155, 197, 251, 223, 155, 21, 5, 172,
42 254, 124, 12, 181, 184, 96, 50, 193},
43 {211, 231, 43, 97, 71, 96, 103, 174, 37, 151, 170, 53, 75, 34, 249, 121, 17,
44 138, 110, 213, 141, 136, 120, 151, 233, 168, 93, 255},
45 {245, 127, 242, 218, 130, 250, 162, 181, 102, 120, 84, 179, 220, 251, 80,
46 182, 229, 18, 2, 4, 68, 33, 101, 137, 95, 119, 115, 44, 175, 184, 59, 25,
47 225, 98, 81, 112},
48 {77, 193, 137, 31, 19, 38, 22, 153, 247, 105, 122, 2, 245, 133, 242, 8, 175,
49 95, 100, 9, 167, 105, 214, 111, 57, 121, 21, 1, 253, 57, 54, 101, 248, 202,
50 69, 50, 150, 177, 226, 5, 9, 5},
51 {245, 132, 172, 223, 96, 32, 117, 22, 238, 133, 238, 231, 205, 188, 237, 87,
52 191, 106, 16, 147, 118, 23, 37, 90, 170, 205, 131, 88, 120, 100, 66, 138,
53 186, 240, 82, 44, 176, 87, 187, 147, 160, 175, 69, 213, 92, 253, 225, 19},
54 {175, 9, 223, 238, 12, 17, 220, 208, 100, 29, 175, 170, 230, 192, 215, 235,
55 150, 159, 36, 223, 38, 200, 132, 54, 228, 146, 218, 234, 117, 203, 29, 232,
56 144, 238, 22, 150, 201, 117, 62, 207, 164, 13, 137, 245, 127, 67, 247, 28,
57 155, 43, 203, 107, 233, 53, 143, 46},
58 {242, 93, 169, 50, 144, 210, 39, 118, 202, 188, 201, 189, 143, 108, 196, 37,
59 185, 112, 134, 230, 245, 63, 197, 190, 250, 106, 185, 221, 175, 64, 114,
60 71, 161, 44, 147, 6, 27, 218, 51, 63, 87, 10, 40, 130, 188, 17, 163, 31,
61 176, 170, 4, 107, 232, 7, 94, 166, 224, 124, 86, 47, 11, 204},
62 {220, 228, 173, 89, 251, 149, 159, 56, 89, 33, 147, 244, 154, 36, 73, 127,
63 213, 136, 248, 180, 234, 197, 158, 177, 68, 122, 93, 213, 15, 160, 227,
64 236, 66, 139, 153, 185, 202, 167, 179, 25, 220, 232, 96, 210, 231, 136,
65 223, 239, 181, 241, 59, 52, 172, 25, 49, 232, 211, 189, 64, 54, 108, 153,
66 132, 63, 96, 103, 82, 186}};
67 int32_t CBC_ErrorCorrection::MODULO_VALUE = 0x12D;
68 int32_t CBC_ErrorCorrection::LOG[256] = {0};
69 int32_t CBC_ErrorCorrection::ALOG[256] = {0};
Initialize()70 void CBC_ErrorCorrection::Initialize() {
71 int32_t p = 1;
72 for (int32_t i = 0; i < 255; i++) {
73 ALOG[i] = p;
74 LOG[p] = i;
75 p <<= 1;
76 if (p >= 256) {
77 p ^= MODULO_VALUE;
78 }
79 }
80 }
Finalize()81 void CBC_ErrorCorrection::Finalize() {}
CBC_ErrorCorrection()82 CBC_ErrorCorrection::CBC_ErrorCorrection() {}
~CBC_ErrorCorrection()83 CBC_ErrorCorrection::~CBC_ErrorCorrection() {}
encodeECC200(CFX_WideString codewords,CBC_SymbolInfo * symbolInfo,int32_t & e)84 CFX_WideString CBC_ErrorCorrection::encodeECC200(CFX_WideString codewords,
85 CBC_SymbolInfo* symbolInfo,
86 int32_t& e) {
87 if (codewords.GetLength() != symbolInfo->m_dataCapacity) {
88 e = BCExceptionIllegalArgument;
89 return (FX_WCHAR*)"";
90 }
91 CFX_WideString sb;
92 sb += codewords;
93 int32_t blockCount = symbolInfo->getInterleavedBlockCount();
94 if (blockCount == 1) {
95 CFX_WideString ecc =
96 createECCBlock(codewords, symbolInfo->m_errorCodewords, e);
97 BC_EXCEPTION_CHECK_ReturnValue(e, (FX_WCHAR*)"");
98 sb += ecc;
99 } else {
100 CFX_Int32Array dataSizes;
101 dataSizes.SetSize(blockCount);
102 CFX_Int32Array errorSizes;
103 errorSizes.SetSize(blockCount);
104 CFX_Int32Array startPos;
105 startPos.SetSize(blockCount);
106 for (int32_t i = 0; i < blockCount; i++) {
107 dataSizes[i] = symbolInfo->getDataLengthForInterleavedBlock(i + 1);
108 errorSizes[i] = symbolInfo->getErrorLengthForInterleavedBlock(i + 1);
109 startPos[i] = 0;
110 if (i > 0) {
111 startPos[i] = startPos[i - 1] + dataSizes[i];
112 }
113 }
114 for (int32_t block = 0; block < blockCount; block++) {
115 CFX_WideString temp;
116 for (int32_t d = block; d < symbolInfo->m_dataCapacity; d += blockCount) {
117 temp += (FX_WCHAR)codewords.GetAt(d);
118 }
119 CFX_WideString ecc = createECCBlock(temp, errorSizes[block], e);
120 BC_EXCEPTION_CHECK_ReturnValue(e, (FX_WCHAR*)"");
121 int32_t pos = 0;
122 for (int32_t l = block; l < errorSizes[block] * blockCount;
123 l += blockCount) {
124 sb.SetAt(symbolInfo->m_dataCapacity + l, ecc.GetAt(pos++));
125 }
126 }
127 }
128 return sb;
129 }
createECCBlock(CFX_WideString codewords,int32_t numECWords,int32_t & e)130 CFX_WideString CBC_ErrorCorrection::createECCBlock(CFX_WideString codewords,
131 int32_t numECWords,
132 int32_t& e) {
133 return createECCBlock(codewords, 0, codewords.GetLength(), numECWords, e);
134 }
createECCBlock(CFX_WideString codewords,int32_t start,int32_t len,int32_t numECWords,int32_t & e)135 CFX_WideString CBC_ErrorCorrection::createECCBlock(CFX_WideString codewords,
136 int32_t start,
137 int32_t len,
138 int32_t numECWords,
139 int32_t& e) {
140 int32_t table = -1;
141 for (int32_t i = 0; i < sizeof(FACTOR_SETS) / sizeof(int32_t); i++) {
142 if (FACTOR_SETS[i] == numECWords) {
143 table = i;
144 break;
145 }
146 }
147 if (table < 0) {
148 e = BCExceptionIllegalArgument;
149 return (FX_WCHAR*)"";
150 }
151 FX_WORD* ecc = FX_Alloc(FX_WORD, numECWords);
152 FXSYS_memset(ecc, 0, numECWords * sizeof(FX_WORD));
153 for (int32_t l = start; l < start + len; l++) {
154 FX_WORD m = ecc[numECWords - 1] ^ codewords.GetAt(l);
155 for (int32_t k = numECWords - 1; k > 0; k--) {
156 if (m != 0 && FACTORS[table][k] != 0) {
157 ecc[k] = (FX_WORD)(ecc[k - 1] ^
158 ALOG[(LOG[m] + LOG[FACTORS[table][k]]) % 255]);
159 } else {
160 ecc[k] = ecc[k - 1];
161 }
162 }
163 if (m != 0 && FACTORS[table][0] != 0) {
164 ecc[0] = (FX_WORD)ALOG[(LOG[m] + LOG[FACTORS[table][0]]) % 255];
165 } else {
166 ecc[0] = 0;
167 }
168 }
169 CFX_WideString strecc;
170 for (int32_t j = 0; j < numECWords; j++) {
171 strecc += (FX_WCHAR)ecc[numECWords - j - 1];
172 }
173 FX_Free(ecc);
174 return strecc;
175 }
176