Organize barcode codes into modules.

xfa/src/fxbarcode/src/BC_PDF417ECModulusPoly.cpp

-// 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 "barcode.h"
-#include "include/BC_PDF417Common.h"
-#include "include/BC_PDF417ECModulusGF.h"
-#include "include/BC_PDF417ECModulusPoly.h"
-CBC_PDF417ECModulusPoly::CBC_PDF417ECModulusPoly(CBC_PDF417ECModulusGF* field, CFX_Int32Array &coefficients, FX_INT32 &e)
-{
-    if (coefficients.GetSize() == 0) {
-        e = BCExceptionIllegalArgument;
-    }
-    m_field = field;
-    FX_INT32 coefficientsLength = coefficients.GetSize();
-    if (coefficientsLength > 1 && coefficients[0] == 0) {
-        FX_INT32 firstNonZero = 1;
-        while (firstNonZero < coefficientsLength && coefficients[firstNonZero] == 0) {
-            firstNonZero++;
-        }
-        if (firstNonZero == coefficientsLength) {
-            m_coefficients = field->getZero()->m_coefficients;
-        } else {
-            m_coefficients.SetSize(coefficientsLength - firstNonZero);
-            FX_INT32 l = 0;
-            for (FX_INT32 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;
-}
-FX_INT32 CBC_PDF417ECModulusPoly::getDegree()
-{
-    return m_coefficients.GetSize() - 1;
-}
-FX_BOOL CBC_PDF417ECModulusPoly::isZero()
-{
-    return m_coefficients[0] == 0;
-}
-FX_INT32 CBC_PDF417ECModulusPoly::getCoefficient(FX_INT32 degree)
-{
-    return m_coefficients[m_coefficients.GetSize() - 1 - degree];
-}
-FX_INT32 CBC_PDF417ECModulusPoly::evaluateAt(FX_INT32 a)
-{
-    if (a == 0) {
-        return getCoefficient(0);
-    }
-    FX_INT32 size = m_coefficients.GetSize();
-    if (a == 1) {
-        FX_INT32 result = 0;
-        for (FX_INT32 l = 0; l < m_coefficients.GetSize(); l++) {
-            FX_INT32 coefficient = m_coefficients.GetAt(l);
-            result = m_field->add(result, coefficient);
-        }
-        return result;
-    }
-    FX_INT32 result = m_coefficients[0];
-    for (FX_INT32 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, FX_INT32 &e)
-{
-    CBC_PDF417ECModulusPoly* modulusPoly = NULL;
-    if (isZero()) {
-        modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(other->getField(), other->getCoefficients(), e);
-        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-        return modulusPoly;
-    }
-    if (other->isZero()) {
-        modulusPoly = FX_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());
-    FX_INT32 lengthDiff = largerCoefficients.GetSize() - smallerCoefficients.GetSize();
-    for (FX_INT32 l = 0; l < lengthDiff; l++) {
-        sumDiff.SetAt(l, largerCoefficients.GetAt(l));
-    }
-    for (FX_INT32 i = lengthDiff; i < largerCoefficients.GetSize(); i++) {
-        sumDiff[i] = m_field->add(smallerCoefficients[i - lengthDiff], largerCoefficients[i]);
-    }
-    modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(m_field, sumDiff, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    return modulusPoly;
-}
-CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::subtract(CBC_PDF417ECModulusPoly* other, FX_INT32 &e)
-{
-    CBC_PDF417ECModulusPoly* modulusPoly = NULL;
-    if (other->isZero()) {
-        modulusPoly = FX_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, FX_INT32 &e)
-{
-    CBC_PDF417ECModulusPoly* modulusPoly = NULL;
-    if (isZero() || other->isZero()) {
-        modulusPoly = FX_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);
-    FX_INT32 aLength = aCoefficients.GetSize();
-    CFX_Int32Array bCoefficients;
-    bCoefficients.Copy(other->m_coefficients);
-    FX_INT32 bLength = bCoefficients.GetSize();
-    CFX_Int32Array product;
-    product.SetSize(aLength + bLength - 1);
-    for (FX_INT32 i = 0; i < aLength; i++) {
-        FX_INT32 aCoeff = aCoefficients[i];
-        for (FX_INT32 j = 0; j < bLength; j++) {
-            product[i + j] = m_field->add(product[i + j], m_field->multiply(aCoeff, bCoefficients[j]));
-        }
-    }
-    modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(m_field, product, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    return modulusPoly;
-}
-CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::negative(FX_INT32 &e)
-{
-    FX_INT32 size = m_coefficients.GetSize();
-    CFX_Int32Array negativeCoefficients;
-    negativeCoefficients.SetSize(size);
-    for (FX_INT32 i = 0; i < size; i++) {
-        negativeCoefficients[i] = m_field->subtract(0, m_coefficients[i]);
-    }
-    CBC_PDF417ECModulusPoly* modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(m_field, negativeCoefficients, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    return modulusPoly;
-}
-CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiply(FX_INT32 scalar, FX_INT32 &e)
-{
-    CBC_PDF417ECModulusPoly* modulusPoly = NULL;
-    if (scalar == 0) {
-        modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(m_field->getZero()->getField(), m_field->getZero()->getCoefficients(), e);
-        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-        return modulusPoly;
-    }
-    if (scalar == 1) {
-        modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
-        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-        return modulusPoly;
-    }
-    FX_INT32 size = m_coefficients.GetSize();
-    CFX_Int32Array product;
-    product.SetSize(size);
-    for (FX_INT32 i = 0; i < size; i++) {
-        product[i] = m_field->multiply(m_coefficients[i], scalar);
-    }
-    modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(m_field, product, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    return modulusPoly;
-}
-CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusPoly::multiplyByMonomial(FX_INT32 degree, FX_INT32 coefficient, FX_INT32 &e)
-{
-    if (degree < 0) {
-        e = BCExceptionIllegalArgument;
-        return NULL;
-    }
-    CBC_PDF417ECModulusPoly* modulusPoly = NULL;
-    if (coefficient == 0) {
-        modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(m_field->getZero()->m_field, m_field->getZero()->m_coefficients, e);
-        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-        return modulusPoly;
-    }
-    FX_INT32 size = m_coefficients.GetSize();
-    CFX_Int32Array product;
-    product.SetSize(size + degree);
-    for (FX_INT32 i = 0; i < size; i++) {
-        product[i] = m_field->multiply(m_coefficients[i], coefficient);
-    }
-    modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(m_field, product, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    return modulusPoly;
-}
-CFX_PtrArray* CBC_PDF417ECModulusPoly::divide(CBC_PDF417ECModulusPoly* other, FX_INT32 &e)
-{
-    if (other->isZero()) {
-        e = BCExceptionDivideByZero;
-        return NULL;
-    }
-    CBC_PDF417ECModulusPoly* quotient = FX_NEW CBC_PDF417ECModulusPoly(m_field->getZero()->m_field, m_field->getZero()->m_coefficients, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    CBC_PDF417ECModulusPoly* remainder = FX_NEW CBC_PDF417ECModulusPoly(m_field, m_coefficients, e);
-    if (e != BCExceptionNO) {
-        delete quotient;
-        return NULL;
-    }
-    FX_INT32 denominatorLeadingTerm = other->getCoefficient(other->getDegree());
-    FX_INT32 inverseDenominatorLeadingTerm = m_field->inverse(denominatorLeadingTerm, e);
-    if (e != BCExceptionNO) {
-        delete quotient;
-        delete remainder;
-        return NULL;
-    }
-    while (remainder->getDegree() >= other->getDegree() && !remainder->isZero()) {
-        FX_INT32 degreeDifference = remainder->getDegree() - other->getDegree();
-        FX_INT32 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 = FX_NEW CFX_PtrArray;
-    modulusPoly->Add(quotient);
-    modulusPoly->Add(remainder);
-    return modulusPoly;
-}
-CFX_ByteString CBC_PDF417ECModulusPoly::toString()
-{
-    CFX_ByteString result;
-    for (FX_INT32 degree = getDegree(); degree >= 0; degree--) {
-        FX_INT32 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;
-}