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Diffstat (limited to 'fxbarcode/datamatrix/BC_ErrorCorrection.cpp')
| -rw-r--r-- | fxbarcode/datamatrix/BC_ErrorCorrection.cpp | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/fxbarcode/datamatrix/BC_ErrorCorrection.cpp b/fxbarcode/datamatrix/BC_ErrorCorrection.cpp new file mode 100644 index 0000000000..72ce8fcdf3 --- /dev/null +++ b/fxbarcode/datamatrix/BC_ErrorCorrection.cpp @@ -0,0 +1,209 @@ +// Copyright 2014 PDFium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com +// Original code is licensed as follows: +/* + * Copyright 2006 Jeremias Maerki. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <vector> + +#include "fxbarcode/datamatrix/BC_Encoder.h" +#include "fxbarcode/datamatrix/BC_ErrorCorrection.h" +#include "fxbarcode/datamatrix/BC_SymbolInfo.h" +#include "fxbarcode/datamatrix/BC_SymbolShapeHint.h" + +namespace { + +const uint8_t FACTOR_SETS[] = {5, 7, 10, 11, 12, 14, 18, 20, + 24, 28, 36, 42, 48, 56, 62, 68}; + +const uint8_t FACTORS_0[5] = {228, 48, 15, 111, 62}; +const uint8_t FACTORS_1[7] = {23, 68, 144, 134, 240, 92, 254}; +const uint8_t FACTORS_2[10] = {28, 24, 185, 166, 223, 248, 116, 255, 110, 61}; +const uint8_t FACTORS_3[11] = {175, 138, 205, 12, 194, 168, + 39, 245, 60, 97, 120}; + +const uint8_t FACTORS_4[12] = {41, 153, 158, 91, 61, 42, + 142, 213, 97, 178, 100, 242}; + +const uint8_t FACTORS_5[14] = {156, 97, 192, 252, 95, 9, 157, + 119, 138, 45, 18, 186, 83, 185}; + +const uint8_t FACTORS_6[18] = {83, 195, 100, 39, 188, 75, 66, 61, 241, + 213, 109, 129, 94, 254, 225, 48, 90, 188}; + +const uint8_t FACTORS_7[20] = {15, 195, 244, 9, 233, 71, 168, 2, 188, 160, + 153, 145, 253, 79, 108, 82, 27, 174, 186, 172}; + +const uint8_t FACTORS_8[24] = {52, 190, 88, 205, 109, 39, 176, 21, + 155, 197, 251, 223, 155, 21, 5, 172, + 254, 124, 12, 181, 184, 96, 50, 193}; + +const uint8_t FACTORS_9[28] = {211, 231, 43, 97, 71, 96, 103, 174, 37, 151, + 170, 53, 75, 34, 249, 121, 17, 138, 110, 213, + 141, 136, 120, 151, 233, 168, 93, 255}; + +const uint8_t FACTORS_10[36] = {245, 127, 242, 218, 130, 250, 162, 181, 102, + 120, 84, 179, 220, 251, 80, 182, 229, 18, + 2, 4, 68, 33, 101, 137, 95, 119, 115, + 44, 175, 184, 59, 25, 225, 98, 81, 112}; + +const uint8_t FACTORS_11[42] = { + 77, 193, 137, 31, 19, 38, 22, 153, 247, 105, 122, 2, 245, 133, + 242, 8, 175, 95, 100, 9, 167, 105, 214, 111, 57, 121, 21, 1, + 253, 57, 54, 101, 248, 202, 69, 50, 150, 177, 226, 5, 9, 5}; + +const uint8_t FACTORS_12[48] = { + 245, 132, 172, 223, 96, 32, 117, 22, 238, 133, 238, 231, + 205, 188, 237, 87, 191, 106, 16, 147, 118, 23, 37, 90, + 170, 205, 131, 88, 120, 100, 66, 138, 186, 240, 82, 44, + 176, 87, 187, 147, 160, 175, 69, 213, 92, 253, 225, 19}; + +const uint8_t FACTORS_13[56] = { + 175, 9, 223, 238, 12, 17, 220, 208, 100, 29, 175, 170, 230, 192, + 215, 235, 150, 159, 36, 223, 38, 200, 132, 54, 228, 146, 218, 234, + 117, 203, 29, 232, 144, 238, 22, 150, 201, 117, 62, 207, 164, 13, + 137, 245, 127, 67, 247, 28, 155, 43, 203, 107, 233, 53, 143, 46}; + +const uint8_t FACTORS_14[62] = { + 242, 93, 169, 50, 144, 210, 39, 118, 202, 188, 201, 189, 143, + 108, 196, 37, 185, 112, 134, 230, 245, 63, 197, 190, 250, 106, + 185, 221, 175, 64, 114, 71, 161, 44, 147, 6, 27, 218, 51, + 63, 87, 10, 40, 130, 188, 17, 163, 31, 176, 170, 4, 107, + 232, 7, 94, 166, 224, 124, 86, 47, 11, 204}; + +const uint8_t FACTORS_15[68] = { + 220, 228, 173, 89, 251, 149, 159, 56, 89, 33, 147, 244, 154, 36, + 73, 127, 213, 136, 248, 180, 234, 197, 158, 177, 68, 122, 93, 213, + 15, 160, 227, 236, 66, 139, 153, 185, 202, 167, 179, 25, 220, 232, + 96, 210, 231, 136, 223, 239, 181, 241, 59, 52, 172, 25, 49, 232, + 211, 189, 64, 54, 108, 153, 132, 63, 96, 103, 82, 186}; + +const uint8_t* const FACTORS[16] = { + FACTORS_0, FACTORS_1, FACTORS_2, FACTORS_3, FACTORS_4, FACTORS_5, + FACTORS_6, FACTORS_7, FACTORS_8, FACTORS_9, FACTORS_10, FACTORS_11, + FACTORS_12, FACTORS_13, FACTORS_14, FACTORS_15}; + +} // namespace + +int32_t CBC_ErrorCorrection::MODULO_VALUE = 0x12D; +int32_t CBC_ErrorCorrection::LOG[256] = {0}; +int32_t CBC_ErrorCorrection::ALOG[256] = {0}; +void CBC_ErrorCorrection::Initialize() { + int32_t p = 1; + for (int32_t i = 0; i < 255; i++) { + ALOG[i] = p; + LOG[p] = i; + p <<= 1; + if (p >= 256) { + p ^= MODULO_VALUE; + } + } +} +void CBC_ErrorCorrection::Finalize() {} +CBC_ErrorCorrection::CBC_ErrorCorrection() {} +CBC_ErrorCorrection::~CBC_ErrorCorrection() {} +CFX_WideString CBC_ErrorCorrection::encodeECC200(CFX_WideString codewords, + CBC_SymbolInfo* symbolInfo, + int32_t& e) { + if (codewords.GetLength() != symbolInfo->m_dataCapacity) { + e = BCExceptionIllegalArgument; + return CFX_WideString(); + } + CFX_WideString sb; + sb += codewords; + int32_t blockCount = symbolInfo->getInterleavedBlockCount(); + if (blockCount == 1) { + CFX_WideString ecc = + createECCBlock(codewords, symbolInfo->m_errorCodewords, e); + if (e != BCExceptionNO) + return CFX_WideString(); + sb += ecc; + } else { + std::vector<int32_t> dataSizes(blockCount); + std::vector<int32_t> errorSizes(blockCount); + std::vector<int32_t> startPos(blockCount); + for (int32_t i = 0; i < blockCount; i++) { + dataSizes[i] = symbolInfo->getDataLengthForInterleavedBlock(i + 1); + errorSizes[i] = symbolInfo->getErrorLengthForInterleavedBlock(i + 1); + startPos[i] = 0; + if (i > 0) { + startPos[i] = startPos[i - 1] + dataSizes[i]; + } + } + for (int32_t block = 0; block < blockCount; block++) { + CFX_WideString temp; + for (int32_t d = block; d < symbolInfo->m_dataCapacity; d += blockCount) { + temp += (wchar_t)codewords.GetAt(d); + } + CFX_WideString ecc = createECCBlock(temp, errorSizes[block], e); + if (e != BCExceptionNO) + return CFX_WideString(); + int32_t pos = 0; + for (int32_t l = block; l < errorSizes[block] * blockCount; + l += blockCount) { + sb.SetAt(symbolInfo->m_dataCapacity + l, ecc.GetAt(pos++)); + } + } + } + return sb; +} +CFX_WideString CBC_ErrorCorrection::createECCBlock(CFX_WideString codewords, + int32_t numECWords, + int32_t& e) { + return createECCBlock(codewords, 0, codewords.GetLength(), numECWords, e); +} +CFX_WideString CBC_ErrorCorrection::createECCBlock(CFX_WideString codewords, + int32_t start, + int32_t len, + int32_t numECWords, + int32_t& e) { + static const size_t kFactorTableNum = sizeof(FACTOR_SETS) / sizeof(int32_t); + size_t table = 0; + while (table < kFactorTableNum && FACTOR_SETS[table] != numECWords) + table++; + + if (table >= kFactorTableNum) { + e = BCExceptionIllegalArgument; + return CFX_WideString(); + } + uint16_t* ecc = FX_Alloc(uint16_t, numECWords); + FXSYS_memset(ecc, 0, numECWords * sizeof(uint16_t)); + for (int32_t l = start; l < start + len; l++) { + uint16_t m = ecc[numECWords - 1] ^ codewords.GetAt(l); + for (int32_t k = numECWords - 1; k > 0; k--) { + if (m != 0 && FACTORS[table][k] != 0) { + ecc[k] = (uint16_t)(ecc[k - 1] ^ + ALOG[(LOG[m] + LOG[FACTORS[table][k]]) % 255]); + } else { + ecc[k] = ecc[k - 1]; + } + } + if (m != 0 && FACTORS[table][0] != 0) { + ecc[0] = (uint16_t)ALOG[(LOG[m] + LOG[FACTORS[table][0]]) % 255]; + } else { + ecc[0] = 0; + } + } + CFX_WideString strecc; + for (int32_t j = 0; j < numECWords; j++) { + strecc += (wchar_t)ecc[numECWords - j - 1]; + } + FX_Free(ecc); + return strecc; +} |