mirror of
https://github.com/aportelli/LatAnalyze.git
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132 lines
3.8 KiB
C++
132 lines
3.8 KiB
C++
/*
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* CompiledFunction.cpp, part of LatAnalyze 3
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*
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* Copyright (C) 2013 - 2020 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 <LatAnalyze/Functional/CompiledFunction.hpp>
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#include <LatAnalyze/Core/Math.hpp>
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#include <LatAnalyze/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 Index nArg)
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: nArg_(nArg)
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{}
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CompiledDoubleFunction::CompiledDoubleFunction(const string &code,
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const Index nArg)
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: CompiledDoubleFunction(nArg)
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{
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setCode(code);
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}
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// access //////////////////////////////////////////////////////////////////////
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string CompiledDoubleFunction::getCode(void)
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{
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return code_;
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}
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void CompiledDoubleFunction::setCode(const string &code)
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{
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code_ = code;
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interpreter_.reset(new MathInterpreter(code));
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context_.reset(new RunContext);
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varAddress_.reset(new std::vector<unsigned int>);
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isCompiled_.reset(new bool(false));
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}
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// compile /////////////////////////////////////////////////////////////////////
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void CompiledDoubleFunction::compile(void) const
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{
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if (!*isCompiled_)
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{
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varAddress_->clear();
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for (Index i = 0; i < nArg_; ++i)
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{
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varAddress_->push_back(context_->addVariable("x_" + strFrom(i)));
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}
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interpreter_->compile(*(context_));
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*isCompiled_ = true;
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}
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}
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// function call ///////////////////////////////////////////////////////////////
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double CompiledDoubleFunction::operator()(const double *arg) const
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{
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double result;
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compile();
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for (unsigned int i = 0; i < nArg_; ++i)
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{
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context_->setVariable((*varAddress_)[i], arg[i]);
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}
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(*interpreter_)(*context_);
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if (!context_->stack().empty())
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{
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result = context_->stack().top();
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context_->stack().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.compile();
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out << *(f.interpreter_);
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return out;
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}
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// DoubleFunction factory //////////////////////////////////////////////////////
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DoubleFunction CompiledDoubleFunction::makeFunction(const bool makeHardCopy)
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const
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{
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DoubleFunction res;
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if (makeHardCopy)
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{
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CompiledDoubleFunction copy(*this);
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res.setFunction([copy](const double *p){return copy(p);}, nArg_);
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}
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else
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{
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res.setFunction([this](const double *p){return (*this)(p);}, nArg_);
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}
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return res;
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}
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DoubleFunction Latan::compile(const string code, const Index nArg)
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{
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CompiledDoubleFunction compiledFunc(code, nArg);
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return compiledFunc.makeFunction();
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}
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