summaryrefslogtreecommitdiff
path: root/xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp')
-rw-r--r--xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp253
1 files changed, 0 insertions, 253 deletions
diff --git a/xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp b/xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
deleted file mode 100644
index e4ee30b586..0000000000
--- a/xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
+++ /dev/null
@@ -1,253 +0,0 @@
-// 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/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h"
-
-#include <memory>
-#include <utility>
-
-#include "third_party/base/stl_util.h"
-#include "xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
-
-CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly(CBC_ReedSolomonGF256* field,
- int32_t coefficients) {
- if (!field)
- return;
-
- m_field = field;
- m_coefficients.push_back(coefficients);
-}
-
-CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly() {
- m_field = nullptr;
-}
-
-void CBC_ReedSolomonGF256Poly::Init(CBC_ReedSolomonGF256* field,
- std::vector<int32_t>* coefficients,
- int32_t& e) {
- if (!coefficients || coefficients->empty()) {
- e = BCExceptionCoefficientsSizeIsNull;
- return;
- }
- m_field = field;
- size_t coefficientsLength = coefficients->size();
- if (coefficientsLength > 1 && coefficients->front() == 0) {
- size_t firstNonZero = 1;
- while (firstNonZero < coefficientsLength &&
- (*coefficients)[firstNonZero] == 0) {
- firstNonZero++;
- }
- if (firstNonZero == coefficientsLength) {
- m_coefficients = *(m_field->GetZero()->GetCoefficients());
- } else {
- m_coefficients.resize(coefficientsLength - firstNonZero);
- for (size_t i = firstNonZero, j = 0; i < coefficientsLength; i++, j++)
- m_coefficients[j] = (*coefficients)[i];
- }
- } else {
- m_coefficients = *coefficients;
- }
-}
-
-std::vector<int32_t>* CBC_ReedSolomonGF256Poly::GetCoefficients() {
- return &m_coefficients;
-}
-
-int32_t CBC_ReedSolomonGF256Poly::GetDegree() {
- return pdfium::CollectionSize<int32_t>(m_coefficients) - 1;
-}
-
-bool CBC_ReedSolomonGF256Poly::IsZero() {
- return m_coefficients.front() == 0;
-}
-
-int32_t CBC_ReedSolomonGF256Poly::GetCoefficients(int32_t degree) {
- return m_coefficients[m_coefficients.size() - 1 - degree];
-}
-
-int32_t CBC_ReedSolomonGF256Poly::EvaluateAt(int32_t a) {
- if (a == 0) {
- return GetCoefficients(0);
- }
- size_t size = m_coefficients.size();
- if (a == 1) {
- int32_t result = 0;
- for (size_t i = 0; i < size; i++)
- result = CBC_ReedSolomonGF256::AddOrSubtract(result, m_coefficients[i]);
- return result;
- }
- int32_t result = m_coefficients[0];
- for (size_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);
- if (e != BCExceptionNO)
- return nullptr;
- return temp;
-}
-CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::AddOrSubtract(
- CBC_ReedSolomonGF256Poly* other,
- int32_t& e) {
- if (IsZero())
- return other->Clone(e);
- if (other->IsZero())
- return Clone(e);
-
- std::vector<int32_t> smallerCoefficients = m_coefficients;
- std::vector<int32_t> largerCoefficients = *(other->GetCoefficients());
- if (smallerCoefficients.size() > largerCoefficients.size()) {
- std::swap(smallerCoefficients, largerCoefficients);
- }
- std::vector<int32_t> sumDiff(largerCoefficients.size());
- size_t lengthDiff = largerCoefficients.size() - smallerCoefficients.size();
- for (size_t i = 0; i < lengthDiff; i++) {
- sumDiff[i] = largerCoefficients[i];
- }
- for (size_t j = lengthDiff; j < largerCoefficients.size(); j++) {
- sumDiff[j] = CBC_ReedSolomonGF256::AddOrSubtract(
- smallerCoefficients[j - lengthDiff], largerCoefficients[j]);
- }
- CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
- temp->Init(m_field, &sumDiff, e);
- if (e != BCExceptionNO)
- return nullptr;
- return temp;
-}
-CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(
- CBC_ReedSolomonGF256Poly* other,
- int32_t& e) {
- if (IsZero() || other->IsZero())
- return m_field->GetZero()->Clone(e);
-
- std::vector<int32_t> aCoefficients = m_coefficients;
- std::vector<int32_t> bCoefficients = *(other->GetCoefficients());
- size_t aLength = aCoefficients.size();
- size_t bLength = bCoefficients.size();
- std::vector<int32_t> product(aLength + bLength - 1);
- for (size_t i = 0; i < aLength; i++) {
- int32_t aCoeff = m_coefficients[i];
- for (size_t j = 0; j < bLength; j++) {
- product[i + j] = CBC_ReedSolomonGF256::AddOrSubtract(
- product[i + j],
- m_field->Multiply(aCoeff, (*other->GetCoefficients())[j]));
- }
- }
- CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
- temp->Init(m_field, &product, e);
- if (e != BCExceptionNO)
- return nullptr;
- return temp;
-}
-CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(int32_t scalar,
- int32_t& e) {
- if (scalar == 0)
- return m_field->GetZero()->Clone(e);
- if (scalar == 1)
- return Clone(e);
-
- size_t size = m_coefficients.size();
- std::vector<int32_t> product(size);
- for (size_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);
- if (e != BCExceptionNO)
- return nullptr;
- return temp;
-}
-CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::MultiplyByMonomial(
- int32_t degree,
- int32_t coefficient,
- int32_t& e) {
- if (degree < 0) {
- e = BCExceptionDegreeIsNegative;
- return nullptr;
- }
- if (coefficient == 0)
- return m_field->GetZero()->Clone(e);
-
- size_t size = m_coefficients.size();
- std::vector<int32_t> product(size + degree);
- for (size_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);
- if (e != BCExceptionNO)
- return nullptr;
- return temp;
-}
-
-std::vector<CBC_ReedSolomonGF256Poly*>* CBC_ReedSolomonGF256Poly::Divide(
- CBC_ReedSolomonGF256Poly* other,
- int32_t& e) {
- if (other->IsZero()) {
- e = BCExceptionDivideByZero;
- return nullptr;
- }
- std::unique_ptr<CBC_ReedSolomonGF256Poly> quotient(
- m_field->GetZero()->Clone(e));
- if (e != BCExceptionNO)
- return nullptr;
- std::unique_ptr<CBC_ReedSolomonGF256Poly> remainder(Clone(e));
- if (e != BCExceptionNO)
- return nullptr;
- int32_t denominatorLeadingTerm = other->GetCoefficients(other->GetDegree());
- int32_t inverseDenominatorLeadingTeam =
- m_field->Inverse(denominatorLeadingTerm, e);
- if (e != BCExceptionNO)
- return nullptr;
- 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);
- std::unique_ptr<CBC_ReedSolomonGF256Poly> term(
- other->MultiplyByMonomial(degreeDifference, scale, e));
- if (e != BCExceptionNO)
- return nullptr;
- std::unique_ptr<CBC_ReedSolomonGF256Poly> iteratorQuotient(
- m_field->BuildMonomial(degreeDifference, scale, e));
- if (e != BCExceptionNO)
- return nullptr;
- quotient.reset(quotient->AddOrSubtract(iteratorQuotient.get(), e));
- if (e != BCExceptionNO)
- return nullptr;
- remainder.reset(remainder->AddOrSubtract(term.get(), e));
- if (e != BCExceptionNO)
- return nullptr;
- }
- std::vector<CBC_ReedSolomonGF256Poly*>* tempPtrA =
- new std::vector<CBC_ReedSolomonGF256Poly*>();
- tempPtrA->push_back(quotient.release());
- tempPtrA->push_back(remainder.release());
- return tempPtrA;
-}
-
-CBC_ReedSolomonGF256Poly::~CBC_ReedSolomonGF256Poly() {}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 07:56:26 +0000