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//Copyright 2017 Ryan Wick
//This file is part of Bandage.
//Bandage is free software: you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//Bandage is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.
//You should have received a copy of the GNU General Public License
//along with Bandage. If not, see <http://www.gnu.org/licenses/>.
#include "QStringList"
#include "scinot.h"
#include "math.h"
SciNot::SciNot() :
m_coefficient(0.0), m_exponent(0)
{
normalise();
}
SciNot::SciNot(double coefficient, int exponent) :
m_coefficient(coefficient), m_exponent(exponent)
{
normalise();
}
SciNot::SciNot(QString sciNotString) :
m_coefficient(0.0), m_exponent(0)
{
QStringList parts = sciNotString.split('e');
if (parts.size() < 1)
return;
if (parts.size() < 2)
m_coefficient = parts[0].toDouble();
else
{
bool ok;
double coefficient = parts[0].toDouble(&ok);
if (!ok)
return;
double exponent = parts[1].toInt(&ok);
if (!ok)
return;
m_coefficient = coefficient;
m_exponent = exponent;
}
normalise();
}
SciNot::SciNot(double num) :
m_coefficient(num), m_exponent(0)
{
normalise();
}
void SciNot::normalise()
{
if (m_coefficient == 0.0)
{
m_exponent = 0;
return;
}
while (fabs(m_coefficient) >= 10.0)
{
m_coefficient /= 10.0;
++m_exponent;
}
while (fabs(m_coefficient) < 1.0)
{
m_coefficient *= 10.0;
--m_exponent;
}
}
bool SciNot::operator<(SciNot const &other) const
{
if (isZero())
return other.isPositive();
if (isPositive())
{
if (other.isNegative() || other.isZero())
return false;
else //Both are positive
{
if (m_exponent < other.m_exponent) return true;
if (m_exponent > other.m_exponent) return false;
return m_coefficient < other.m_coefficient;
}
}
else //It's negative
{
if (other.isPositive() || other.isZero())
return true;
else //Both are negative
{
if (m_exponent > other.m_exponent) return true;
if (m_exponent < other.m_exponent) return false;
return m_coefficient < other.m_coefficient;
}
}
}
bool SciNot::operator>(SciNot const &other) const
{
return !(*this < other) && (*this != other);
}
bool SciNot::operator<=(SciNot const &other) const
{
return (*this < other) || (*this == other);
}
bool SciNot::operator>=(SciNot const &other) const
{
return (*this > other) || (*this == other);
}
bool SciNot::operator==(SciNot const &other) const
{
return m_coefficient == other.m_coefficient && m_exponent == other.m_exponent;
}
bool SciNot::operator!=(SciNot const &other) const
{
return !(*this == other);
}
QString SciNot::asString(bool alwaysInSciNot) const
{
if (!alwaysInSciNot)
{
if (isZero())
return "0";
if (m_exponent < 3 && m_exponent > -3)
return QString::number(toDouble());
}
return QString::number(m_coefficient) + "e" + QString::number(m_exponent);
}
double SciNot::toDouble() const
{
return m_coefficient * pow(10.0, m_exponent);
}
bool SciNot::isValidSciNotString(QString sciNotString)
{
QStringList parts = sciNotString.split('e');
if (parts.size() != 2)
return false;
bool coefficientOk;
parts[0].toDouble(&coefficientOk);
bool exponentOk;
parts[1].toInt(&exponentOk);
return coefficientOk && exponentOk;
}
void SciNot::power(double p) {
double newCoefficient = pow(m_coefficient, p);
double newExponent = m_exponent * p;
int wholePart = int(newExponent);
double fractionalPart = newExponent - wholePart;
m_coefficient = newCoefficient * pow(10.0, fractionalPart);
m_exponent = wholePart;
normalise();
}
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