mirror of
https://github.com/aportelli/LatAnalyze.git
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88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
/*
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* CompiledFunction.cpp, part of LatAnalyze 3
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*
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* Copyright (C) 2013 - 2014 Antonin Portelli
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*
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* LatAnalyze 3 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LatAnalyze 3 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LatAnalyze 3. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <latan/CompiledFunction.hpp>
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#include <latan/Math.hpp>
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#include <latan/includes.hpp>
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using namespace std;
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using namespace Latan;
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/******************************************************************************
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* Compiled double function implementation *
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******************************************************************************/
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// constructors ////////////////////////////////////////////////////////////////
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CompiledDoubleFunction::CompiledDoubleFunction(const unsigned nArg)
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: DoubleFunction(nArg)
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{}
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CompiledDoubleFunction::CompiledDoubleFunction(const unsigned nArg,
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const string &code)
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: DoubleFunction(nArg)
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{
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setCode(code);
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}
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// access //////////////////////////////////////////////////////////////////////
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void CompiledDoubleFunction::setCode(const string &code)
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{
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interpreter_.reset(new MathInterpreter(code));
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context_.reset(new RunContext);
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StdMath::addStdMathFunc(context_->fTable);
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}
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// function call ///////////////////////////////////////////////////////////////
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double CompiledDoubleFunction::evaluate(const vector<double> &arg) const
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{
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double result;
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if (arg.size() != getNArg())
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{
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LATAN_ERROR(Size, "function argument vector has a wrong size (got " +
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strFrom(arg.size()) + ", expected " + strFrom(getNArg()) +
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")");
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}
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for (unsigned int i = 0; i < getNArg(); ++i)
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{
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context_->vTable["x_" + strFrom(i)] = arg[i];
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}
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(*interpreter_)(*context_);
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if (!context_->dStack.empty())
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{
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result = context_->dStack.top();
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context_->dStack.pop();
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}
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else
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{
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result = 0.0;
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LATAN_ERROR(Program, "program execution resulted in an empty stack");
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}
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return result;
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}
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// IO //////////////////////////////////////////////////////////////////////////
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ostream & Latan::operator<<(ostream &out, CompiledDoubleFunction &f)
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{
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f.interpreter_->compile();
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out << *(f.interpreter_);
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return out;
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}
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