diff options
Diffstat (limited to 'xfa/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp')
| -rw-r--r-- | xfa/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/xfa/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp b/xfa/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp deleted file mode 100644 index a41eeea472..0000000000 --- a/xfa/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp +++ /dev/null @@ -1,323 +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 2012 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 <memory> - -#include "xfa/fxbarcode/pdf417/BC_PDF417Common.h" -#include "xfa/fxbarcode/pdf417/BC_PDF417ECModulusGF.h" -#include "xfa/fxbarcode/pdf417/BC_PDF417ECModulusPoly.h" -#include "xfa/fxbarcode/utils.h" - -CBC_PDF417ECModulusPoly::CBC_PDF417ECModulusPoly(CBC_PDF417ECModulusGF* field, - CFX_Int32Array& coefficients, - int32_t& e) { - if (coefficients.GetSize() == 0) { - e = BCExceptionIllegalArgument; - } - 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 = field->getZero()->m_coefficients; - } else { - m_coefficients.SetSize(coefficientsLength - firstNonZero); - int32_t l = 0; - for (int32_t i = firstNonZero; - i < firstNonZero + m_coefficients.GetSize(); i++) { - m_coefficients.SetAt(l, coefficients.GetAt(i)); - l++; - } - } - } else { - m_coefficients.Copy(coefficients); - } -} -CBC_PDF417ECModulusPoly::~CBC_PDF417ECModulusPoly() {} -CFX_Int32Array& CBC_PDF417ECModulusPoly::getCoefficients() { - return m_coefficients; -} -CBC_PDF417ECModulusGF* CBC_PDF417ECModulusPoly::getField() { - return m_field; -} -int32_t CBC_PDF417ECModulusPoly::getDegree() { - return m_coefficients.GetSize() - 1; -} -FX_BOOL CBC_PDF417ECModulusPoly::isZero() { - return m_coefficients[0] == 0; -} -int32_t CBC_PDF417ECModulusPoly::getCoefficient(int32_t degree) { - return m_coefficients[m_coefficients.GetSize() - 1 - degree]; -} -int32_t CBC_PDF417ECModulusPoly::evaluateAt(int32_t a) { - if (a == 0) { - return getCoefficient(0); - } - int32_t size = m_coefficients.GetSize(); - if (a == 1) { - int32_t result = 0; - for (int32_t l = 0; l < m_coefficients.GetSize(); l++) { - int32_t coefficient = m_coefficients.GetAt(l); - result = m_field->add(result, coefficient); - } - return result; - } - int32_t result = m_coefficients[0]; - for (int32_t i = 1; i < size; i++) { - result = m_field->add(m_field->multiply(a, result), m_coefficients[i]); - } - return result; -} -CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::add( - CBC_PDF417ECModulusPoly* other, - int32_t& e) { - CBC_PDF417ECModulusPoly* modulusPoly = nullptr; - if (isZero()) { - modulusPoly = new CBC_PDF417ECModulusPoly(other->getField(), - other->getCoefficients(), e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; - } - if (other->isZero()) { - modulusPoly = new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; - } - CFX_Int32Array smallerCoefficients; - smallerCoefficients.Copy(m_coefficients); - CFX_Int32Array largerCoefficients; - largerCoefficients.Copy(other->m_coefficients); - 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 l = 0; l < lengthDiff; l++) { - sumDiff.SetAt(l, largerCoefficients.GetAt(l)); - } - for (int32_t i = lengthDiff; i < largerCoefficients.GetSize(); i++) { - sumDiff[i] = m_field->add(smallerCoefficients[i - lengthDiff], - largerCoefficients[i]); - } - modulusPoly = new CBC_PDF417ECModulusPoly(m_field, sumDiff, e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; -} -CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::subtract( - CBC_PDF417ECModulusPoly* other, - int32_t& e) { - CBC_PDF417ECModulusPoly* modulusPoly = nullptr; - if (other->isZero()) { - modulusPoly = new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; - } - CBC_PDF417ECModulusPoly* poly = other->negative(e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - modulusPoly = add(poly, e); - delete poly; - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; -} -CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiply( - CBC_PDF417ECModulusPoly* other, - int32_t& e) { - CBC_PDF417ECModulusPoly* modulusPoly = nullptr; - if (isZero() || other->isZero()) { - modulusPoly = - new CBC_PDF417ECModulusPoly(m_field->getZero()->getField(), - m_field->getZero()->getCoefficients(), e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; - } - CFX_Int32Array aCoefficients; - aCoefficients.Copy(m_coefficients); - int32_t aLength = aCoefficients.GetSize(); - CFX_Int32Array bCoefficients; - bCoefficients.Copy(other->m_coefficients); - int32_t bLength = bCoefficients.GetSize(); - CFX_Int32Array product; - product.SetSize(aLength + bLength - 1); - for (int32_t i = 0; i < aLength; i++) { - int32_t aCoeff = aCoefficients[i]; - for (int32_t j = 0; j < bLength; j++) { - product[i + j] = m_field->add( - product[i + j], m_field->multiply(aCoeff, bCoefficients[j])); - } - } - modulusPoly = new CBC_PDF417ECModulusPoly(m_field, product, e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; -} -CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::negative(int32_t& e) { - int32_t size = m_coefficients.GetSize(); - CFX_Int32Array negativeCoefficients; - negativeCoefficients.SetSize(size); - for (int32_t i = 0; i < size; i++) { - negativeCoefficients[i] = m_field->subtract(0, m_coefficients[i]); - } - CBC_PDF417ECModulusPoly* modulusPoly = - new CBC_PDF417ECModulusPoly(m_field, negativeCoefficients, e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; -} -CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiply(int32_t scalar, - int32_t& e) { - CBC_PDF417ECModulusPoly* modulusPoly = nullptr; - if (scalar == 0) { - modulusPoly = - new CBC_PDF417ECModulusPoly(m_field->getZero()->getField(), - m_field->getZero()->getCoefficients(), e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; - } - if (scalar == 1) { - modulusPoly = new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; - } - 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); - } - modulusPoly = new CBC_PDF417ECModulusPoly(m_field, product, e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; -} - -CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiplyByMonomial( - int32_t degree, - int32_t coefficient, - int32_t& e) { - if (degree < 0) { - e = BCExceptionIllegalArgument; - return nullptr; - } - CBC_PDF417ECModulusPoly* modulusPoly = nullptr; - if (coefficient == 0) { - modulusPoly = new CBC_PDF417ECModulusPoly( - m_field->getZero()->m_field, m_field->getZero()->m_coefficients, e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; - } - 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); - } - modulusPoly = new CBC_PDF417ECModulusPoly(m_field, product, e); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - return modulusPoly; -} - -CFX_ArrayTemplate<CBC_PDF417ECModulusPoly*>* CBC_PDF417ECModulusPoly::divide( - CBC_PDF417ECModulusPoly* other, - int32_t& e) { - if (other->isZero()) { - e = BCExceptionDivideByZero; - return nullptr; - } - std::unique_ptr<CBC_PDF417ECModulusPoly> quotient(new CBC_PDF417ECModulusPoly( - m_field->getZero()->m_field, m_field->getZero()->m_coefficients, e)); - BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); - std::unique_ptr<CBC_PDF417ECModulusPoly> remainder( - new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e)); - if (e != BCExceptionNO) - return nullptr; - - int32_t denominatorLeadingTerm = other->getCoefficient(other->getDegree()); - int32_t inverseDenominatorLeadingTerm = - 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->getCoefficient(remainder->getDegree()), - inverseDenominatorLeadingTerm); - std::unique_ptr<CBC_PDF417ECModulusPoly> term( - other->multiplyByMonomial(degreeDifference, scale, e)); - if (e != BCExceptionNO) - return nullptr; - - std::unique_ptr<CBC_PDF417ECModulusPoly> iterationQuotient( - m_field->buildMonomial(degreeDifference, scale, e)); - if (e != BCExceptionNO) - return nullptr; - - quotient.reset(quotient->add(iterationQuotient.get(), e)); - if (e != BCExceptionNO) - return nullptr; - - remainder.reset(remainder->subtract(term.get(), e)); - if (e != BCExceptionNO) - return nullptr; - } - - CFX_ArrayTemplate<CBC_PDF417ECModulusPoly*>* modulusPoly = - new CFX_ArrayTemplate<CBC_PDF417ECModulusPoly*>(); - modulusPoly->Add(quotient.release()); - modulusPoly->Add(remainder.release()); - return modulusPoly; -} - -CFX_ByteString CBC_PDF417ECModulusPoly::toString() { - CFX_ByteString result; - for (int32_t degree = getDegree(); degree >= 0; degree--) { - int32_t coefficient = getCoefficient(degree); - if (coefficient != 0) { - if (coefficient < 0) { - result += " - "; - coefficient = -coefficient; - } else { - if (result.GetLength() > 0) { - result += " + "; - } - } - if (degree == 0 || coefficient != 1) { - result += coefficient; - } - if (degree != 0) { - if (degree == 1) { - result += 'x'; - } else { - result += "x^"; - result += degree; - } - } - } - } - return result; -} |