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}; 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 } 81 void CBC_ErrorCorrection::Finalize() {} 82 CBC_ErrorCorrection::CBC_ErrorCorrection() {} 83 CBC_ErrorCorrection::~CBC_ErrorCorrection() {} 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 } 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 } 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
