cppcheck/src/mathlib.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2009 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam,
* Leandro Penz, Kimmo Varis, Vesa Pikki, Nguyen Duong Tuan
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/
*/
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#include "mathlib.h"
#include <fstream>
#include <string>
#include <cstring>
#include <iostream>
#include <sstream>
#include <cstdlib>
#include <cmath>
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long MathLib::toLongNumber(const std::string &str)
{
if (strncmp(str.c_str(), "0x", 2) == 0)
{
return strtoul(str.c_str(), '\0', 16);
}
if (strncmp(str.c_str(), "0", 1) == 0)
{
return strtoul(str.c_str(), '\0', 8);
}
return atol(str.c_str());
}
double MathLib::toDoubleNumber(const std::string &str)
{
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return atof(str.c_str());
}
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template <typename T>
std::string MathLib::toString(T d)
{
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std::ostringstream result;
result << d;
return result.str();
}
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bool MathLib::isInt(const std::string & str)
{
if (str.find(".", 0) != std::string::npos || str.find("e", 0) != std::string::npos
|| str.find("E", 0) != std::string::npos)
{
return false;
}
return true;
}
std::string MathLib::add(const std::string & first, const std::string & second)
{
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if (MathLib::isInt(first) && MathLib::isInt(second))
{
return toString<long>(toLongNumber(first) + toLongNumber(second));
}
return toString<double>(toDoubleNumber(first) + toDoubleNumber(second));
}
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std::string MathLib::subtract(const std::string &first, const std::string &second)
{
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if (MathLib::isInt(first) && MathLib::isInt(second))
{
return toString<long>(toLongNumber(first) - toLongNumber(second));
}
return toString<double>(toDoubleNumber(first) - toDoubleNumber(second));
}
std::string MathLib::divide(const std::string &first, const std::string &second)
{
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if (MathLib::isInt(first) && MathLib::isInt(second))
{
return toString<long>(toLongNumber(first) / toLongNumber(second));
}
return toString<double>(toDoubleNumber(first) / toDoubleNumber(second));
}
std::string MathLib::multiply(const std::string &first, const std::string &second)
{
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if (MathLib::isInt(first) && MathLib::isInt(second))
{
return toString<long>(toLongNumber(first) * toLongNumber(second));
}
return toString<double>(toDoubleNumber(first) * toDoubleNumber(second));
}
std::string MathLib::sin(const std::string &tok)
{
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return toString<double>(::sin(toDoubleNumber(tok)));
}
std::string MathLib::cos(const std::string &tok)
{
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return toString<double>(::cos(toDoubleNumber(tok)));
}
std::string MathLib::tan(const std::string &tok)
{
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return toString<double>(::tan(toDoubleNumber(tok)));
}
std::string MathLib::abs(const std::string &tok)
{
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return toString<double>(::abs(toDoubleNumber(tok)));
}
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bool MathLib::isGreater(const std::string &first, const std::string &second)
{
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return toDoubleNumber(first) > toDoubleNumber(second);
}