fxbarcode/datamatrix/BC_ErrorCorrection.cpp - pdfium - Git at Google

 // 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 "fxbarcode/datamatrix/BC_ErrorCorrection.h"

 #include <vector>

 #include "fxbarcode/datamatrix/BC_Encoder.h"
 #include "fxbarcode/datamatrix/BC_SymbolInfo.h"
 #include "fxbarcode/utils.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() {}
 WideString CBC_ErrorCorrection::encodeECC200(WideString codewords,
                                              CBC_SymbolInfo* symbolInfo,
                                              int32_t& e) {
   if (pdfium::base::checked_cast<int32_t>(codewords.GetLength()) !=
       symbolInfo->dataCapacity()) {
     e = BCExceptionIllegalArgument;
     return WideString();
   }
   WideString sb;
   sb += codewords;
   int32_t blockCount = symbolInfo->getInterleavedBlockCount();
   if (blockCount == 1) {
     WideString ecc = createECCBlock(codewords, symbolInfo->errorCodewords(), e);
     if (e != BCExceptionNO)
       return 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++) {
       WideString temp;
       for (int32_t d = block; d < symbolInfo->dataCapacity(); d += blockCount) {
         temp += (wchar_t)codewords[d];
       }
       WideString ecc = createECCBlock(temp, errorSizes[block], e);
       if (e != BCExceptionNO)
         return WideString();
       int32_t pos = 0;
       for (int32_t l = block; l < errorSizes[block] * blockCount;
            l += blockCount) {
         sb.SetAt(symbolInfo->dataCapacity() + l, ecc[pos++]);
       }
     }
   }
   return sb;
 }
 WideString CBC_ErrorCorrection::createECCBlock(WideString codewords,
                                                int32_t numECWords,
                                                int32_t& e) {
   return createECCBlock(codewords, 0, codewords.GetLength(), numECWords, e);
 }
 WideString CBC_ErrorCorrection::createECCBlock(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 WideString();
   }
   uint16_t* ecc = FX_Alloc(uint16_t, numECWords);
   memset(ecc, 0, numECWords * sizeof(uint16_t));
   for (int32_t l = start; l < start + len; l++) {
     uint16_t m = ecc[numECWords - 1] ^ codewords[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;
     }
   }
   WideString strecc;
   for (int32_t j = 0; j < numECWords; j++) {
     strecc += (wchar_t)ecc[numECWords - j - 1];
   }
   FX_Free(ecc);
   return strecc;
 }
	// 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 "fxbarcode/datamatrix/BC_ErrorCorrection.h"

	#include <vector>

	#include "fxbarcode/datamatrix/BC_Encoder.h"
	#include "fxbarcode/datamatrix/BC_SymbolInfo.h"
	#include "fxbarcode/utils.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() {}
	WideString CBC_ErrorCorrection::encodeECC200(WideString codewords,
	CBC_SymbolInfo* symbolInfo,
	int32_t& e) {
	if (pdfium::base::checked_cast<int32_t>(codewords.GetLength()) !=
	symbolInfo->dataCapacity()) {
	e = BCExceptionIllegalArgument;
	return WideString();
	}
	WideString sb;
	sb += codewords;
	int32_t blockCount = symbolInfo->getInterleavedBlockCount();
	if (blockCount == 1) {
	WideString ecc = createECCBlock(codewords, symbolInfo->errorCodewords(), e);
	if (e != BCExceptionNO)
	return 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++) {
	WideString temp;
	for (int32_t d = block; d < symbolInfo->dataCapacity(); d += blockCount) {
	temp += (wchar_t)codewords[d];
	}
	WideString ecc = createECCBlock(temp, errorSizes[block], e);
	if (e != BCExceptionNO)
	return WideString();
	int32_t pos = 0;
	for (int32_t l = block; l < errorSizes[block] * blockCount;
	l += blockCount) {
	sb.SetAt(symbolInfo->dataCapacity() + l, ecc[pos++]);
	}
	}
	}
	return sb;
	}
	WideString CBC_ErrorCorrection::createECCBlock(WideString codewords,
	int32_t numECWords,
	int32_t& e) {
	return createECCBlock(codewords, 0, codewords.GetLength(), numECWords, e);
	}
	WideString CBC_ErrorCorrection::createECCBlock(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 WideString();
	}
	uint16_t* ecc = FX_Alloc(uint16_t, numECWords);
	memset(ecc, 0, numECWords * sizeof(uint16_t));
	for (int32_t l = start; l < start + len; l++) {
	uint16_t m = ecc[numECWords - 1] ^ codewords[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;
	}
	}
	WideString strecc;
	for (int32_t j = 0; j < numECWords; j++) {
	strecc += (wchar_t)ecc[numECWords - j - 1];
	}
	FX_Free(ecc);
	return strecc;
	}