interpreter.cpp

"More for C++" is a class library that provides some features that are usually common for object ori

//
//  This file is part of the "More for C++" library
//
//  Copyright (c) 1999-2003 by Thorsten Goertz ([e-mail])
//
//  The "More for C++" library is free software; you can redistribute it and/or
//  modify it under the terms of the license that comes with this package.
//
//  Read "license.txt" for more details.
//
//  THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
//  WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES
//  OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

////////////////////////////////////////////////////////////////////////////////

#include <more/stl.hpp>
#include <more/script/interpreter.hpp>

using namespace more;
using namespace more::script;

////////////////////////////////////////////////////////////////////////////////

typedef std::map<String, InterpreterFactory*> FactoryMap;
typedef FactoryMap::const_iterator FactoryMapIterator;
typedef std::map<String, p<Interpreter> > InterpreterMap;
typedef InterpreterMap::const_iterator InterpreterMapIterator;

static FactoryMap factoryMap;
static InterpreterMap interpreterMap;

////////////////////////////////////////////////////////////////////////////////

Interpreter::NotAvailable::operator const char* ( ) const
{
  return "Interpreter not available";
}

////////////////////////////////////////////////////////////////////////////////

p<Interpreter> Interpreter::retrieve
(
  const String& sLanguage

) throw( Interpreter::NotAvailable )
{
  InterpreterMapIterator pInterpreterMapIterator;

  pInterpreterMapIterator = interpreterMap.find( sLanguage );

  if( pInterpreterMapIterator == interpreterMap.end( ) )
  {
    FactoryMapIterator pFactoryMapIterator = factoryMap.find( sLanguage );

    if( pFactoryMapIterator != factoryMap.end( ) )
    {
      InterpreterFactory* pInterpreterFactory = pFactoryMapIterator -> second;

      interpreterMap[sLanguage] = pInterpreterFactory -> createInterpreter( );
      pInterpreterMapIterator = interpreterMap.find( sLanguage );
    }
  }

  if( pInterpreterMapIterator == interpreterMap.end( ) )
  {
    throw Interpreter::NotAvailable( );
  }

  return pInterpreterMapIterator -> second;
}

////////////////////////////////////////////////////////////////////////////////

Interpreter::~Interpreter( )
{
}

////////////////////////////////////////////////////////////////////////////////

InterpreterFactory::~InterpreterFactory( )
{
}

////////////////////////////////////////////////////////////////////////////////

void InterpreterFactory::init( )
{
  factoryMap[getLanguage( )] = this;
}

////////////////////////////////////////////////////////////////////////////////

void InterpreterFactory::dispose( )
{
  interpreterMap.clear( );
  factoryMap.clear( );
}

////////////////////////////////////////////////////////////////////////////////

#include <more/features.hpp>
#ifdef MORE_PYTHON_ENABLED
#  include "pythoninterpreterimpl.hpp"

// Must be done in this module to prevent linker optimization!
static PythonInterpreterFactory factory;

#endif

////////////////////////////////////////////////////////////////////////////////