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path: root/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
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Diffstat (limited to 'fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp')
-rw-r--r--fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp169
1 files changed, 78 insertions, 91 deletions
diff --git a/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
index a062589218..5c26188f53 100644
--- a/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
+++ b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
@@ -26,6 +26,7 @@
#include <utility>
#include "fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
+#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly(CBC_ReedSolomonGF256* field,
@@ -41,13 +42,11 @@ 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;
- }
+bool CBC_ReedSolomonGF256Poly::Init(CBC_ReedSolomonGF256* field,
+ const std::vector<int32_t>* coefficients) {
+ if (!coefficients || coefficients->empty())
+ return false;
+
m_field = field;
size_t coefficientsLength = coefficients->size();
if (coefficientsLength > 1 && coefficients->front() == 0) {
@@ -57,7 +56,7 @@ void CBC_ReedSolomonGF256Poly::Init(CBC_ReedSolomonGF256* field,
firstNonZero++;
}
if (firstNonZero == coefficientsLength) {
- m_coefficients = *(m_field->GetZero()->GetCoefficients());
+ m_coefficients = m_field->GetZero()->GetCoefficients();
} else {
m_coefficients.resize(coefficientsLength - firstNonZero);
for (size_t i = firstNonZero, j = 0; i < coefficientsLength; i++, j++)
@@ -66,28 +65,29 @@ void CBC_ReedSolomonGF256Poly::Init(CBC_ReedSolomonGF256* field,
} else {
m_coefficients = *coefficients;
}
+ return true;
}
-std::vector<int32_t>* CBC_ReedSolomonGF256Poly::GetCoefficients() {
- return &m_coefficients;
+const std::vector<int32_t>& CBC_ReedSolomonGF256Poly::GetCoefficients() const {
+ return m_coefficients;
}
-int32_t CBC_ReedSolomonGF256Poly::GetDegree() {
+int32_t CBC_ReedSolomonGF256Poly::GetDegree() const {
return pdfium::CollectionSize<int32_t>(m_coefficients) - 1;
}
-bool CBC_ReedSolomonGF256Poly::IsZero() {
+bool CBC_ReedSolomonGF256Poly::IsZero() const {
return m_coefficients.front() == 0;
}
-int32_t CBC_ReedSolomonGF256Poly::GetCoefficients(int32_t degree) {
+int32_t CBC_ReedSolomonGF256Poly::GetCoefficients(int32_t degree) const {
return m_coefficients[m_coefficients.size() - 1 - degree];
}
int32_t CBC_ReedSolomonGF256Poly::EvaluateAt(int32_t a) {
- if (a == 0) {
+ if (a == 0)
return GetCoefficients(0);
- }
+
size_t size = m_coefficients.size();
if (a == 1) {
int32_t result = 0;
@@ -103,121 +103,114 @@ int32_t CBC_ReedSolomonGF256Poly::EvaluateAt(int32_t a) {
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)
+std::unique_ptr<CBC_ReedSolomonGF256Poly> CBC_ReedSolomonGF256Poly::Clone()
+ const {
+ auto temp = pdfium::MakeUnique<CBC_ReedSolomonGF256Poly>();
+ if (!temp->Init(m_field, &m_coefficients))
return nullptr;
return temp;
}
-CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::AddOrSubtract(
- CBC_ReedSolomonGF256Poly* other,
- int32_t& e) {
+
+std::unique_ptr<CBC_ReedSolomonGF256Poly>
+CBC_ReedSolomonGF256Poly::AddOrSubtract(const CBC_ReedSolomonGF256Poly* other) {
if (IsZero())
- return other->Clone(e);
+ return other->Clone();
if (other->IsZero())
- return Clone(e);
+ return Clone();
std::vector<int32_t> smallerCoefficients = m_coefficients;
- std::vector<int32_t> largerCoefficients = *(other->GetCoefficients());
- if (smallerCoefficients.size() > largerCoefficients.size()) {
+ 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++) {
+ 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)
+ auto temp = pdfium::MakeUnique<CBC_ReedSolomonGF256Poly>();
+ if (!temp->Init(m_field, &sumDiff))
return nullptr;
return temp;
}
-CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(
- CBC_ReedSolomonGF256Poly* other,
- int32_t& e) {
+
+std::unique_ptr<CBC_ReedSolomonGF256Poly> CBC_ReedSolomonGF256Poly::Multiply(
+ const CBC_ReedSolomonGF256Poly* other) {
if (IsZero() || other->IsZero())
- return m_field->GetZero()->Clone(e);
+ return m_field->GetZero()->Clone();
- std::vector<int32_t> aCoefficients = m_coefficients;
- std::vector<int32_t> bCoefficients = *(other->GetCoefficients());
+ const std::vector<int32_t>& aCoefficients = m_coefficients;
+ const 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];
+ int32_t aCoeff = aCoefficients[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]));
+ product[i + j], m_field->Multiply(aCoeff, bCoefficients[j]));
}
}
- CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
- temp->Init(m_field, &product, e);
- if (e != BCExceptionNO)
+ auto temp = pdfium::MakeUnique<CBC_ReedSolomonGF256Poly>();
+ if (!temp->Init(m_field, &product))
return nullptr;
return temp;
}
-CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(int32_t scalar,
- int32_t& e) {
+
+std::unique_ptr<CBC_ReedSolomonGF256Poly> CBC_ReedSolomonGF256Poly::Multiply(
+ int32_t scalar) {
if (scalar == 0)
- return m_field->GetZero()->Clone(e);
+ return m_field->GetZero()->Clone();
if (scalar == 1)
- return Clone(e);
+ return Clone();
size_t size = m_coefficients.size();
std::vector<int32_t> product(size);
- for (size_t i = 0; i < size; i++) {
+ 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)
+
+ auto temp = pdfium::MakeUnique<CBC_ReedSolomonGF256Poly>();
+ if (!temp->Init(m_field, &product))
return nullptr;
return temp;
}
-CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::MultiplyByMonomial(
- int32_t degree,
- int32_t coefficient,
- int32_t& e) {
- if (degree < 0) {
- e = BCExceptionDegreeIsNegative;
+
+std::unique_ptr<CBC_ReedSolomonGF256Poly>
+CBC_ReedSolomonGF256Poly::MultiplyByMonomial(int32_t degree,
+ int32_t coefficient) const {
+ if (degree < 0)
return nullptr;
- }
if (coefficient == 0)
- return m_field->GetZero()->Clone(e);
+ return m_field->GetZero()->Clone();
size_t size = m_coefficients.size();
std::vector<int32_t> product(size + degree);
- for (size_t i = 0; i < size; i++) {
+ 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)
+
+ auto temp = pdfium::MakeUnique<CBC_ReedSolomonGF256Poly>();
+ if (!temp->Init(m_field, &product))
return nullptr;
return temp;
}
-std::vector<CBC_ReedSolomonGF256Poly*>* CBC_ReedSolomonGF256Poly::Divide(
- CBC_ReedSolomonGF256Poly* other,
- int32_t& e) {
- if (other->IsZero()) {
- e = BCExceptionDivideByZero;
+std::unique_ptr<CBC_ReedSolomonGF256Poly> CBC_ReedSolomonGF256Poly::Divide(
+ const CBC_ReedSolomonGF256Poly* other) {
+ if (other->IsZero())
return nullptr;
- }
- std::unique_ptr<CBC_ReedSolomonGF256Poly> quotient(
- m_field->GetZero()->Clone(e));
- if (e != BCExceptionNO)
+
+ auto quotient = m_field->GetZero()->Clone();
+ if (!quotient)
return nullptr;
- std::unique_ptr<CBC_ReedSolomonGF256Poly> remainder(Clone(e));
- if (e != BCExceptionNO)
+ auto remainder = Clone();
+ if (!remainder)
return nullptr;
+
+ int e = BCExceptionNO;
int32_t denominatorLeadingTerm = other->GetCoefficients(other->GetDegree());
int32_t inverseDenominatorLeadingTeam =
m_field->Inverse(denominatorLeadingTerm, e);
@@ -228,26 +221,20 @@ std::vector<CBC_ReedSolomonGF256Poly*>* CBC_ReedSolomonGF256Poly::Divide(
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)
+ auto term = other->MultiplyByMonomial(degreeDifference, scale);
+ if (!term)
return nullptr;
- std::unique_ptr<CBC_ReedSolomonGF256Poly> iteratorQuotient(
- m_field->BuildMonomial(degreeDifference, scale, e));
+ auto iteratorQuotient = m_field->BuildMonomial(degreeDifference, scale, e);
if (e != BCExceptionNO)
return nullptr;
- quotient.reset(quotient->AddOrSubtract(iteratorQuotient.get(), e));
- if (e != BCExceptionNO)
+ quotient = quotient->AddOrSubtract(iteratorQuotient.get());
+ if (!quotient)
return nullptr;
- remainder.reset(remainder->AddOrSubtract(term.get(), e));
- if (e != BCExceptionNO)
+ remainder = remainder->AddOrSubtract(term.get());
+ if (!remainder)
return nullptr;
}
- std::vector<CBC_ReedSolomonGF256Poly*>* tempPtrA =
- new std::vector<CBC_ReedSolomonGF256Poly*>();
- tempPtrA->push_back(quotient.release());
- tempPtrA->push_back(remainder.release());
- return tempPtrA;
+ return remainder;
}
CBC_ReedSolomonGF256Poly::~CBC_ReedSolomonGF256Poly() {}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-07 12:23:33 +0000