| Index: xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
|
| diff --git a/xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp b/xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
|
| index f87cd5ba86eff0047bff3041fb5562a1a2569452..b1eed008cf184997da7e255c8016012a0dafbd3f 100644
|
| --- a/xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
|
| +++ b/xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
|
| @@ -1,259 +1,259 @@
|
| -// 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 2007 ZXing authors
|
| - *
|
| - * 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 "xfa/src/fxbarcode/barcode.h"
|
| -#include "BC_ReedSolomonGF256.h"
|
| -#include "BC_ReedSolomonGF256Poly.h"
|
| -CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly(CBC_ReedSolomonGF256* field,
|
| - int32_t coefficients) {
|
| - if (field == NULL) {
|
| - return;
|
| - }
|
| - m_field = field;
|
| - m_coefficients.Add(coefficients);
|
| -}
|
| -CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly() {
|
| - m_field = NULL;
|
| -}
|
| -void CBC_ReedSolomonGF256Poly::Init(CBC_ReedSolomonGF256* field,
|
| - CFX_Int32Array* coefficients,
|
| - int32_t& e) {
|
| - if (coefficients == NULL || coefficients->GetSize() == 0) {
|
| - e = BCExceptionCoefficientsSizeIsNull;
|
| - BC_EXCEPTION_CHECK_ReturnVoid(e);
|
| - }
|
| - m_field = field;
|
| - int32_t coefficientsLength = coefficients->GetSize();
|
| - if ((coefficientsLength > 1 && (*coefficients)[0] == 0)) {
|
| - int32_t firstNonZero = 1;
|
| - while ((firstNonZero < coefficientsLength) &&
|
| - ((*coefficients)[firstNonZero] == 0)) {
|
| - firstNonZero++;
|
| - }
|
| - if (firstNonZero == coefficientsLength) {
|
| - m_coefficients.Copy(*(m_field->GetZero()->GetCoefficients()));
|
| - } else {
|
| - m_coefficients.SetSize(coefficientsLength - firstNonZero);
|
| - for (int32_t i = firstNonZero, j = 0; i < coefficientsLength; i++, j++) {
|
| - m_coefficients[j] = coefficients->operator[](i);
|
| - }
|
| - }
|
| - } else {
|
| - m_coefficients.Copy(*coefficients);
|
| - }
|
| -}
|
| -CFX_Int32Array* CBC_ReedSolomonGF256Poly::GetCoefficients() {
|
| - return &m_coefficients;
|
| -}
|
| -int32_t CBC_ReedSolomonGF256Poly::GetDegree() {
|
| - return m_coefficients.GetSize() - 1;
|
| -}
|
| -FX_BOOL CBC_ReedSolomonGF256Poly::IsZero() {
|
| - return m_coefficients[0] == 0;
|
| -}
|
| -int32_t CBC_ReedSolomonGF256Poly::GetCoefficients(int32_t degree) {
|
| - return m_coefficients[m_coefficients.GetSize() - 1 - degree];
|
| -}
|
| -int32_t CBC_ReedSolomonGF256Poly::EvaluateAt(int32_t a) {
|
| - if (a == 0) {
|
| - return GetCoefficients(0);
|
| - }
|
| - int32_t size = m_coefficients.GetSize();
|
| - if (a == 1) {
|
| - int32_t result = 0;
|
| - for (int32_t i = 0; i < size; i++) {
|
| - result = CBC_ReedSolomonGF256::AddOrSubtract(result, m_coefficients[i]);
|
| - }
|
| - return result;
|
| - }
|
| - int32_t result = m_coefficients[0];
|
| - for (int32_t j = 1; j < size; j++) {
|
| - result = CBC_ReedSolomonGF256::AddOrSubtract(m_field->Multiply(a, result),
|
| - m_coefficients[j]);
|
| - }
|
| - return result;
|
| -}
|
| -CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Clone(int32_t& e) {
|
| - CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| - temp->Init(m_field, &m_coefficients, e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - return temp;
|
| -}
|
| -CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::AddOrSubtract(
|
| - CBC_ReedSolomonGF256Poly* other,
|
| - int32_t& e) {
|
| - if (IsZero()) {
|
| - return other->Clone(e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - }
|
| - if (other->IsZero()) {
|
| - return this->Clone(e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - }
|
| - CFX_Int32Array smallerCoefficients;
|
| - smallerCoefficients.Copy(m_coefficients);
|
| - CFX_Int32Array largerCoefficients;
|
| - largerCoefficients.Copy(*(other->GetCoefficients()));
|
| - if (smallerCoefficients.GetSize() > largerCoefficients.GetSize()) {
|
| - CFX_Int32Array temp;
|
| - temp.Copy(smallerCoefficients);
|
| - smallerCoefficients.Copy(largerCoefficients);
|
| - largerCoefficients.Copy(temp);
|
| - }
|
| - CFX_Int32Array sumDiff;
|
| - sumDiff.SetSize(largerCoefficients.GetSize());
|
| - int32_t lengthDiff =
|
| - largerCoefficients.GetSize() - smallerCoefficients.GetSize();
|
| - for (int32_t i = 0; i < lengthDiff; i++) {
|
| - sumDiff[i] = largerCoefficients[i];
|
| - }
|
| - for (int32_t j = lengthDiff; j < largerCoefficients.GetSize(); j++) {
|
| - sumDiff[j] = (CBC_ReedSolomonGF256::AddOrSubtract(
|
| - smallerCoefficients[j - lengthDiff], largerCoefficients[j]));
|
| - }
|
| - CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| - temp->Init(m_field, &sumDiff, e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - return temp;
|
| -}
|
| -CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(
|
| - CBC_ReedSolomonGF256Poly* other,
|
| - int32_t& e) {
|
| - if (IsZero() || other->IsZero()) {
|
| - CBC_ReedSolomonGF256Poly* temp = m_field->GetZero()->Clone(e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - return temp;
|
| - }
|
| - CFX_Int32Array aCoefficients;
|
| - aCoefficients.Copy(m_coefficients);
|
| - int32_t aLength = m_coefficients.GetSize();
|
| - CFX_Int32Array bCoefficients;
|
| - bCoefficients.Copy(*(other->GetCoefficients()));
|
| - int32_t bLength = other->GetCoefficients()->GetSize();
|
| - CFX_Int32Array product;
|
| - product.SetSize(aLength + bLength - 1);
|
| - for (int32_t i = 0; i < aLength; i++) {
|
| - int32_t aCoeff = m_coefficients[i];
|
| - for (int32_t j = 0; j < bLength; j++) {
|
| - product[i + j] = CBC_ReedSolomonGF256::AddOrSubtract(
|
| - product[i + j],
|
| - m_field->Multiply(aCoeff, other->GetCoefficients()->operator[](j)));
|
| - }
|
| - }
|
| - CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| - temp->Init(m_field, &product, e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - return temp;
|
| -}
|
| -CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(int32_t scalar,
|
| - int32_t& e) {
|
| - if (scalar == 0) {
|
| - CBC_ReedSolomonGF256Poly* temp = m_field->GetZero()->Clone(e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - return temp;
|
| - }
|
| - if (scalar == 1) {
|
| - return this->Clone(e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - }
|
| - int32_t size = m_coefficients.GetSize();
|
| - CFX_Int32Array product;
|
| - product.SetSize(size);
|
| - for (int32_t i = 0; i < size; i++) {
|
| - product[i] = m_field->Multiply(m_coefficients[i], scalar);
|
| - }
|
| - CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| - temp->Init(m_field, &product, e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - return temp;
|
| -}
|
| -CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::MultiplyByMonomial(
|
| - int32_t degree,
|
| - int32_t coefficient,
|
| - int32_t& e) {
|
| - if (degree < 0) {
|
| - e = BCExceptionDegreeIsNegative;
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - }
|
| - if (coefficient == 0) {
|
| - CBC_ReedSolomonGF256Poly* temp = m_field->GetZero()->Clone(e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - return temp;
|
| - }
|
| - int32_t size = m_coefficients.GetSize();
|
| - CFX_Int32Array product;
|
| - product.SetSize(size + degree);
|
| - for (int32_t i = 0; i < size; i++) {
|
| - product[i] = (m_field->Multiply(m_coefficients[i], coefficient));
|
| - }
|
| - CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| - temp->Init(m_field, &product, e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - return temp;
|
| -}
|
| -CFX_PtrArray* CBC_ReedSolomonGF256Poly::Divide(CBC_ReedSolomonGF256Poly* other,
|
| - int32_t& e) {
|
| - if (other->IsZero()) {
|
| - e = BCExceptionDivideByZero;
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - }
|
| - CBC_ReedSolomonGF256Poly* rsg1 = m_field->GetZero()->Clone(e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - CBC_AutoPtr<CBC_ReedSolomonGF256Poly> quotient(rsg1);
|
| - CBC_ReedSolomonGF256Poly* rsg2 = this->Clone(e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - CBC_AutoPtr<CBC_ReedSolomonGF256Poly> remainder(rsg2);
|
| - int32_t denominatorLeadingTerm = other->GetCoefficients(other->GetDegree());
|
| - int32_t inverseDenominatorLeadingTeam =
|
| - m_field->Inverse(denominatorLeadingTerm, e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - while (remainder->GetDegree() >= other->GetDegree() && !remainder->IsZero()) {
|
| - int32_t degreeDifference = remainder->GetDegree() - other->GetDegree();
|
| - int32_t scale =
|
| - m_field->Multiply(remainder->GetCoefficients((remainder->GetDegree())),
|
| - inverseDenominatorLeadingTeam);
|
| - CBC_ReedSolomonGF256Poly* rsg3 =
|
| - other->MultiplyByMonomial(degreeDifference, scale, e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - CBC_AutoPtr<CBC_ReedSolomonGF256Poly> term(rsg3);
|
| - CBC_ReedSolomonGF256Poly* rsg4 =
|
| - m_field->BuildMonomial(degreeDifference, scale, e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - CBC_AutoPtr<CBC_ReedSolomonGF256Poly> iteratorQuotient(rsg4);
|
| - CBC_ReedSolomonGF256Poly* rsg5 =
|
| - quotient->AddOrSubtract(iteratorQuotient.get(), e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp(rsg5);
|
| - quotient = temp;
|
| - CBC_ReedSolomonGF256Poly* rsg6 = remainder->AddOrSubtract(term.get(), e);
|
| - BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| - CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp1(rsg6);
|
| - remainder = temp1;
|
| - }
|
| - CFX_PtrArray* tempPtrA = new CFX_PtrArray;
|
| - tempPtrA->Add(quotient.release());
|
| - tempPtrA->Add(remainder.release());
|
| - return tempPtrA;
|
| -}
|
| -CBC_ReedSolomonGF256Poly::~CBC_ReedSolomonGF256Poly() {
|
| - m_coefficients.RemoveAll();
|
| -}
|
| +// 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 2007 ZXing authors
|
| + *
|
| + * 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 "xfa/src/fxbarcode/barcode.h"
|
| +#include "BC_ReedSolomonGF256.h"
|
| +#include "BC_ReedSolomonGF256Poly.h"
|
| +CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly(CBC_ReedSolomonGF256* field,
|
| + int32_t coefficients) {
|
| + if (field == NULL) {
|
| + return;
|
| + }
|
| + m_field = field;
|
| + m_coefficients.Add(coefficients);
|
| +}
|
| +CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly() {
|
| + m_field = NULL;
|
| +}
|
| +void CBC_ReedSolomonGF256Poly::Init(CBC_ReedSolomonGF256* field,
|
| + CFX_Int32Array* coefficients,
|
| + int32_t& e) {
|
| + if (coefficients == NULL || coefficients->GetSize() == 0) {
|
| + e = BCExceptionCoefficientsSizeIsNull;
|
| + BC_EXCEPTION_CHECK_ReturnVoid(e);
|
| + }
|
| + m_field = field;
|
| + int32_t coefficientsLength = coefficients->GetSize();
|
| + if ((coefficientsLength > 1 && (*coefficients)[0] == 0)) {
|
| + int32_t firstNonZero = 1;
|
| + while ((firstNonZero < coefficientsLength) &&
|
| + ((*coefficients)[firstNonZero] == 0)) {
|
| + firstNonZero++;
|
| + }
|
| + if (firstNonZero == coefficientsLength) {
|
| + m_coefficients.Copy(*(m_field->GetZero()->GetCoefficients()));
|
| + } else {
|
| + m_coefficients.SetSize(coefficientsLength - firstNonZero);
|
| + for (int32_t i = firstNonZero, j = 0; i < coefficientsLength; i++, j++) {
|
| + m_coefficients[j] = coefficients->operator[](i);
|
| + }
|
| + }
|
| + } else {
|
| + m_coefficients.Copy(*coefficients);
|
| + }
|
| +}
|
| +CFX_Int32Array* CBC_ReedSolomonGF256Poly::GetCoefficients() {
|
| + return &m_coefficients;
|
| +}
|
| +int32_t CBC_ReedSolomonGF256Poly::GetDegree() {
|
| + return m_coefficients.GetSize() - 1;
|
| +}
|
| +FX_BOOL CBC_ReedSolomonGF256Poly::IsZero() {
|
| + return m_coefficients[0] == 0;
|
| +}
|
| +int32_t CBC_ReedSolomonGF256Poly::GetCoefficients(int32_t degree) {
|
| + return m_coefficients[m_coefficients.GetSize() - 1 - degree];
|
| +}
|
| +int32_t CBC_ReedSolomonGF256Poly::EvaluateAt(int32_t a) {
|
| + if (a == 0) {
|
| + return GetCoefficients(0);
|
| + }
|
| + int32_t size = m_coefficients.GetSize();
|
| + if (a == 1) {
|
| + int32_t result = 0;
|
| + for (int32_t i = 0; i < size; i++) {
|
| + result = CBC_ReedSolomonGF256::AddOrSubtract(result, m_coefficients[i]);
|
| + }
|
| + return result;
|
| + }
|
| + int32_t result = m_coefficients[0];
|
| + for (int32_t j = 1; j < size; j++) {
|
| + result = CBC_ReedSolomonGF256::AddOrSubtract(m_field->Multiply(a, result),
|
| + m_coefficients[j]);
|
| + }
|
| + return result;
|
| +}
|
| +CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Clone(int32_t& e) {
|
| + CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| + temp->Init(m_field, &m_coefficients, e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + return temp;
|
| +}
|
| +CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::AddOrSubtract(
|
| + CBC_ReedSolomonGF256Poly* other,
|
| + int32_t& e) {
|
| + if (IsZero()) {
|
| + return other->Clone(e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + }
|
| + if (other->IsZero()) {
|
| + return this->Clone(e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + }
|
| + CFX_Int32Array smallerCoefficients;
|
| + smallerCoefficients.Copy(m_coefficients);
|
| + CFX_Int32Array largerCoefficients;
|
| + largerCoefficients.Copy(*(other->GetCoefficients()));
|
| + if (smallerCoefficients.GetSize() > largerCoefficients.GetSize()) {
|
| + CFX_Int32Array temp;
|
| + temp.Copy(smallerCoefficients);
|
| + smallerCoefficients.Copy(largerCoefficients);
|
| + largerCoefficients.Copy(temp);
|
| + }
|
| + CFX_Int32Array sumDiff;
|
| + sumDiff.SetSize(largerCoefficients.GetSize());
|
| + int32_t lengthDiff =
|
| + largerCoefficients.GetSize() - smallerCoefficients.GetSize();
|
| + for (int32_t i = 0; i < lengthDiff; i++) {
|
| + sumDiff[i] = largerCoefficients[i];
|
| + }
|
| + for (int32_t j = lengthDiff; j < largerCoefficients.GetSize(); j++) {
|
| + sumDiff[j] = (CBC_ReedSolomonGF256::AddOrSubtract(
|
| + smallerCoefficients[j - lengthDiff], largerCoefficients[j]));
|
| + }
|
| + CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| + temp->Init(m_field, &sumDiff, e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + return temp;
|
| +}
|
| +CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(
|
| + CBC_ReedSolomonGF256Poly* other,
|
| + int32_t& e) {
|
| + if (IsZero() || other->IsZero()) {
|
| + CBC_ReedSolomonGF256Poly* temp = m_field->GetZero()->Clone(e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + return temp;
|
| + }
|
| + CFX_Int32Array aCoefficients;
|
| + aCoefficients.Copy(m_coefficients);
|
| + int32_t aLength = m_coefficients.GetSize();
|
| + CFX_Int32Array bCoefficients;
|
| + bCoefficients.Copy(*(other->GetCoefficients()));
|
| + int32_t bLength = other->GetCoefficients()->GetSize();
|
| + CFX_Int32Array product;
|
| + product.SetSize(aLength + bLength - 1);
|
| + for (int32_t i = 0; i < aLength; i++) {
|
| + int32_t aCoeff = m_coefficients[i];
|
| + for (int32_t j = 0; j < bLength; j++) {
|
| + product[i + j] = CBC_ReedSolomonGF256::AddOrSubtract(
|
| + product[i + j],
|
| + m_field->Multiply(aCoeff, other->GetCoefficients()->operator[](j)));
|
| + }
|
| + }
|
| + CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| + temp->Init(m_field, &product, e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + return temp;
|
| +}
|
| +CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(int32_t scalar,
|
| + int32_t& e) {
|
| + if (scalar == 0) {
|
| + CBC_ReedSolomonGF256Poly* temp = m_field->GetZero()->Clone(e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + return temp;
|
| + }
|
| + if (scalar == 1) {
|
| + return this->Clone(e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + }
|
| + int32_t size = m_coefficients.GetSize();
|
| + CFX_Int32Array product;
|
| + product.SetSize(size);
|
| + for (int32_t i = 0; i < size; i++) {
|
| + product[i] = m_field->Multiply(m_coefficients[i], scalar);
|
| + }
|
| + CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| + temp->Init(m_field, &product, e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + return temp;
|
| +}
|
| +CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::MultiplyByMonomial(
|
| + int32_t degree,
|
| + int32_t coefficient,
|
| + int32_t& e) {
|
| + if (degree < 0) {
|
| + e = BCExceptionDegreeIsNegative;
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + }
|
| + if (coefficient == 0) {
|
| + CBC_ReedSolomonGF256Poly* temp = m_field->GetZero()->Clone(e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + return temp;
|
| + }
|
| + int32_t size = m_coefficients.GetSize();
|
| + CFX_Int32Array product;
|
| + product.SetSize(size + degree);
|
| + for (int32_t i = 0; i < size; i++) {
|
| + product[i] = (m_field->Multiply(m_coefficients[i], coefficient));
|
| + }
|
| + CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
|
| + temp->Init(m_field, &product, e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + return temp;
|
| +}
|
| +CFX_PtrArray* CBC_ReedSolomonGF256Poly::Divide(CBC_ReedSolomonGF256Poly* other,
|
| + int32_t& e) {
|
| + if (other->IsZero()) {
|
| + e = BCExceptionDivideByZero;
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + }
|
| + CBC_ReedSolomonGF256Poly* rsg1 = m_field->GetZero()->Clone(e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + CBC_AutoPtr<CBC_ReedSolomonGF256Poly> quotient(rsg1);
|
| + CBC_ReedSolomonGF256Poly* rsg2 = this->Clone(e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + CBC_AutoPtr<CBC_ReedSolomonGF256Poly> remainder(rsg2);
|
| + int32_t denominatorLeadingTerm = other->GetCoefficients(other->GetDegree());
|
| + int32_t inverseDenominatorLeadingTeam =
|
| + m_field->Inverse(denominatorLeadingTerm, e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + while (remainder->GetDegree() >= other->GetDegree() && !remainder->IsZero()) {
|
| + int32_t degreeDifference = remainder->GetDegree() - other->GetDegree();
|
| + int32_t scale =
|
| + m_field->Multiply(remainder->GetCoefficients((remainder->GetDegree())),
|
| + inverseDenominatorLeadingTeam);
|
| + CBC_ReedSolomonGF256Poly* rsg3 =
|
| + other->MultiplyByMonomial(degreeDifference, scale, e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + CBC_AutoPtr<CBC_ReedSolomonGF256Poly> term(rsg3);
|
| + CBC_ReedSolomonGF256Poly* rsg4 =
|
| + m_field->BuildMonomial(degreeDifference, scale, e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + CBC_AutoPtr<CBC_ReedSolomonGF256Poly> iteratorQuotient(rsg4);
|
| + CBC_ReedSolomonGF256Poly* rsg5 =
|
| + quotient->AddOrSubtract(iteratorQuotient.get(), e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp(rsg5);
|
| + quotient = temp;
|
| + CBC_ReedSolomonGF256Poly* rsg6 = remainder->AddOrSubtract(term.get(), e);
|
| + BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
|
| + CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp1(rsg6);
|
| + remainder = temp1;
|
| + }
|
| + CFX_PtrArray* tempPtrA = new CFX_PtrArray;
|
| + tempPtrA->Add(quotient.release());
|
| + tempPtrA->Add(remainder.release());
|
| + return tempPtrA;
|
| +}
|
| +CBC_ReedSolomonGF256Poly::~CBC_ReedSolomonGF256Poly() {
|
| + m_coefficients.RemoveAll();
|
| +}
|
|
|