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Unified Diff: xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp

Issue 1636873004: XFA: Fix DOS newlines (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@xfa
Patch Set: All of them Created 4 years, 11 months ago
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Index: xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp
diff --git a/xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp b/xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp
index cc4976d2103eff54f2f662b55a6b42f6df376aff..710b0c703dd54ecbc71cac89bf7badab67f98840 100644
--- a/xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp
+++ b/xfa/src/fxbarcode/pdf417/BC_PDF417ECModulusPoly.cpp
@@ -1,331 +1,331 @@
-// 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 "xfa/src/fxbarcode/barcode.h"
-#include "BC_PDF417Common.h"
-#include "BC_PDF417ECModulusGF.h"
-#include "BC_PDF417ECModulusPoly.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 = NULL;
- if (isZero()) {
- modulusPoly = new CBC_PDF417ECModulusPoly(other->getField(),
- other->getCoefficients(), e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- return modulusPoly;
- }
- if (other->isZero()) {
- modulusPoly = new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- 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, NULL);
- return modulusPoly;
-}
-CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::subtract(
- CBC_PDF417ECModulusPoly* other,
- int32_t& e) {
- CBC_PDF417ECModulusPoly* modulusPoly = NULL;
- if (other->isZero()) {
- modulusPoly = new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- return modulusPoly;
- }
- CBC_PDF417ECModulusPoly* poly = other->negative(e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- modulusPoly = add(poly, e);
- delete poly;
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- return modulusPoly;
-}
-CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiply(
- CBC_PDF417ECModulusPoly* other,
- int32_t& e) {
- CBC_PDF417ECModulusPoly* modulusPoly = NULL;
- if (isZero() || other->isZero()) {
- modulusPoly =
- new CBC_PDF417ECModulusPoly(m_field->getZero()->getField(),
- m_field->getZero()->getCoefficients(), e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- 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, NULL);
- 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, NULL);
- return modulusPoly;
-}
-CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiply(int32_t scalar,
- int32_t& e) {
- CBC_PDF417ECModulusPoly* modulusPoly = NULL;
- if (scalar == 0) {
- modulusPoly =
- new CBC_PDF417ECModulusPoly(m_field->getZero()->getField(),
- m_field->getZero()->getCoefficients(), e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- return modulusPoly;
- }
- if (scalar == 1) {
- modulusPoly = new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- 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, NULL);
- return modulusPoly;
-}
-CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiplyByMonomial(
- int32_t degree,
- int32_t coefficient,
- int32_t& e) {
- if (degree < 0) {
- e = BCExceptionIllegalArgument;
- return NULL;
- }
- CBC_PDF417ECModulusPoly* modulusPoly = NULL;
- if (coefficient == 0) {
- modulusPoly = new CBC_PDF417ECModulusPoly(
- m_field->getZero()->m_field, m_field->getZero()->m_coefficients, e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- 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, NULL);
- return modulusPoly;
-}
-CFX_PtrArray* CBC_PDF417ECModulusPoly::divide(CBC_PDF417ECModulusPoly* other,
- int32_t& e) {
- if (other->isZero()) {
- e = BCExceptionDivideByZero;
- return NULL;
- }
- CBC_PDF417ECModulusPoly* quotient = new CBC_PDF417ECModulusPoly(
- m_field->getZero()->m_field, m_field->getZero()->m_coefficients, e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- CBC_PDF417ECModulusPoly* remainder =
- new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
- if (e != BCExceptionNO) {
- delete quotient;
- return NULL;
- }
- int32_t denominatorLeadingTerm = other->getCoefficient(other->getDegree());
- int32_t inverseDenominatorLeadingTerm =
- m_field->inverse(denominatorLeadingTerm, e);
- if (e != BCExceptionNO) {
- delete quotient;
- delete remainder;
- return NULL;
- }
- 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);
- CBC_PDF417ECModulusPoly* term =
- other->multiplyByMonomial(degreeDifference, scale, e);
- if (e != BCExceptionNO) {
- delete quotient;
- delete remainder;
- return NULL;
- }
- CBC_PDF417ECModulusPoly* iterationQuotient =
- m_field->buildMonomial(degreeDifference, scale, e);
- if (e != BCExceptionNO) {
- delete quotient;
- delete remainder;
- delete term;
- return NULL;
- }
- CBC_PDF417ECModulusPoly* temp = quotient;
- quotient = temp->add(iterationQuotient, e);
- delete iterationQuotient;
- delete temp;
- if (e != BCExceptionNO) {
- delete remainder;
- return NULL;
- }
- temp = remainder;
- remainder = temp->subtract(term, e);
- delete term;
- delete temp;
- if (e != BCExceptionNO) {
- delete quotient;
- return NULL;
- }
- }
- CFX_PtrArray* modulusPoly = new CFX_PtrArray;
- modulusPoly->Add(quotient);
- modulusPoly->Add(remainder);
- 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;
-}
+// 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 "xfa/src/fxbarcode/barcode.h"
+#include "BC_PDF417Common.h"
+#include "BC_PDF417ECModulusGF.h"
+#include "BC_PDF417ECModulusPoly.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 = NULL;
+ if (isZero()) {
+ modulusPoly = new CBC_PDF417ECModulusPoly(other->getField(),
+ other->getCoefficients(), e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ return modulusPoly;
+ }
+ if (other->isZero()) {
+ modulusPoly = new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ 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, NULL);
+ return modulusPoly;
+}
+CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::subtract(
+ CBC_PDF417ECModulusPoly* other,
+ int32_t& e) {
+ CBC_PDF417ECModulusPoly* modulusPoly = NULL;
+ if (other->isZero()) {
+ modulusPoly = new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ return modulusPoly;
+ }
+ CBC_PDF417ECModulusPoly* poly = other->negative(e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ modulusPoly = add(poly, e);
+ delete poly;
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ return modulusPoly;
+}
+CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiply(
+ CBC_PDF417ECModulusPoly* other,
+ int32_t& e) {
+ CBC_PDF417ECModulusPoly* modulusPoly = NULL;
+ if (isZero() || other->isZero()) {
+ modulusPoly =
+ new CBC_PDF417ECModulusPoly(m_field->getZero()->getField(),
+ m_field->getZero()->getCoefficients(), e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ 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, NULL);
+ 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, NULL);
+ return modulusPoly;
+}
+CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiply(int32_t scalar,
+ int32_t& e) {
+ CBC_PDF417ECModulusPoly* modulusPoly = NULL;
+ if (scalar == 0) {
+ modulusPoly =
+ new CBC_PDF417ECModulusPoly(m_field->getZero()->getField(),
+ m_field->getZero()->getCoefficients(), e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ return modulusPoly;
+ }
+ if (scalar == 1) {
+ modulusPoly = new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ 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, NULL);
+ return modulusPoly;
+}
+CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiplyByMonomial(
+ int32_t degree,
+ int32_t coefficient,
+ int32_t& e) {
+ if (degree < 0) {
+ e = BCExceptionIllegalArgument;
+ return NULL;
+ }
+ CBC_PDF417ECModulusPoly* modulusPoly = NULL;
+ if (coefficient == 0) {
+ modulusPoly = new CBC_PDF417ECModulusPoly(
+ m_field->getZero()->m_field, m_field->getZero()->m_coefficients, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ 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, NULL);
+ return modulusPoly;
+}
+CFX_PtrArray* CBC_PDF417ECModulusPoly::divide(CBC_PDF417ECModulusPoly* other,
+ int32_t& e) {
+ if (other->isZero()) {
+ e = BCExceptionDivideByZero;
+ return NULL;
+ }
+ CBC_PDF417ECModulusPoly* quotient = new CBC_PDF417ECModulusPoly(
+ m_field->getZero()->m_field, m_field->getZero()->m_coefficients, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ CBC_PDF417ECModulusPoly* remainder =
+ new CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
+ if (e != BCExceptionNO) {
+ delete quotient;
+ return NULL;
+ }
+ int32_t denominatorLeadingTerm = other->getCoefficient(other->getDegree());
+ int32_t inverseDenominatorLeadingTerm =
+ m_field->inverse(denominatorLeadingTerm, e);
+ if (e != BCExceptionNO) {
+ delete quotient;
+ delete remainder;
+ return NULL;
+ }
+ 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);
+ CBC_PDF417ECModulusPoly* term =
+ other->multiplyByMonomial(degreeDifference, scale, e);
+ if (e != BCExceptionNO) {
+ delete quotient;
+ delete remainder;
+ return NULL;
+ }
+ CBC_PDF417ECModulusPoly* iterationQuotient =
+ m_field->buildMonomial(degreeDifference, scale, e);
+ if (e != BCExceptionNO) {
+ delete quotient;
+ delete remainder;
+ delete term;
+ return NULL;
+ }
+ CBC_PDF417ECModulusPoly* temp = quotient;
+ quotient = temp->add(iterationQuotient, e);
+ delete iterationQuotient;
+ delete temp;
+ if (e != BCExceptionNO) {
+ delete remainder;
+ return NULL;
+ }
+ temp = remainder;
+ remainder = temp->subtract(term, e);
+ delete term;
+ delete temp;
+ if (e != BCExceptionNO) {
+ delete quotient;
+ return NULL;
+ }
+ }
+ CFX_PtrArray* modulusPoly = new CFX_PtrArray;
+ modulusPoly->Add(quotient);
+ modulusPoly->Add(remainder);
+ 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;
+}
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