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// interpreter.cc
// marvin - programme du robot 2006. {{{
//
// Copyright (C) 2006 Nicolas Schodet
//
// Robot APB Team/Efrei 2006.
//        Web: http://assos.efrei.fr/robot/
//      Email: robot AT efrei DOT fr
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// }}}
#include "interpreter.hh"

/// Destructor.
Interpreter::~Interpreter (void)
{
    for (Funcs::iterator i = funcs_.begin (); i != funcs_.end (); ++i)
      {
	delete i->second;
      }
}

/// Add a function, Interpreter owns f.
void
Interpreter::add (const std::string &s, Func *f)
{
    if (!funcs_.insert (Funcs::value_type (s, f)).second)
      {
	// Interpreter owns f, therefore, f must be deleted.
	delete f;
	throw std::runtime_error ("function \'" + s
				  + "\' inserted two times");
      }
}

/// Call a function by name.
void
Interpreter::call (const std::string &s, const Args &a,
		   bool dryrun/*false*/) const
{
    Funcs::const_iterator i;
    i = funcs_.find (s);
    if (i == funcs_.end ())
	throw std::runtime_error ("function \'" + s + "\' does not exist");
    try
      {
	(*i->second) (a, dryrun);
      }
    catch (const std::exception &e)
      {
	throw std::runtime_error ("while calling \'" + s + "\', "
				  + e.what ());
      }
}