type.cc

C++ Reflection & Service Library

/* C++ Reflection & Serice Library
 * Copyright (C) 2003  Marcus Perlick
 * mailto: [e-mail]
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 *
 * This file is part of the "C++ Reflection & Serice Library" */
#include "Type.hh"

#include "Exception.hh"

namespace rfl {

  void
  Type::create( void* addr ) const
  {
    if ( create_ ) {
      create_( this, addr );
    }
    else {
      Exception x( X_NO_STD_CTOR,
		   _("class %s has no standard constructor."),
		   name_.c_str() );
      throw x;
    }
  }

  void
  Type::create( void* addr, const void* obj ) const
  {
    if ( cCreate_ ) {
      cCreate_( this, addr, obj );
    }
    else {
      Exception x( X_NO_CPY_CTOR,
		   _("class %s has no copy constructor."),
		   name_.c_str() );
      throw x;
    }
  }

  void
  Type::destroy( void* obj ) const
  {
    if ( destroy_ ) {
      destroy_(  this, obj );
    }
    else {
      Exception x( X_NO_DESTROY,
		   _("class %s has no destructor."),
		   name_.c_str() );
      throw x;
    }
  }

  void
  Type::assign( void* dst, const void* src ) const
  {
    if ( assign_ ) {
      assign_( this, dst, src );
    }
    else {
      Exception x( X_NO_ASSIGN,
		   _("class %s ha no assignment operator"),
		   name_.c_str() );
      throw x;
    }
  }
  
  void*
  Type::newObj( void ) const
  {
    if ( newObj_ ) {
      return newObj_( this );
    }
    
    void* ret = std::malloc( getSize() );
    if ( ret ) {
      create( ret );
    }
    
    return ret;
  }

  void* Type::newObj( const void* obj ) const
  {
    if ( newCopy_ ) {
      return newCopy_( this, obj );
    }

    void* ret = std::malloc( getSize() );
    if ( ret ) {
      create( ret, obj );
    }

    return ret;
  }

  void Type::delObj( void* obj ) const
  {
    if ( delObj_ ) {
      delObj_( this, obj );
    }
    else if ( !newObj_ && !newCopy_ ) {
      destroy( obj );
      std::free( obj );
    }
    else {
      Exception x( X_MISS_DELETE,
		   _("trying to call std::free() for object of class %s "\
		     "that might have been allocated another way."),
		   name_.c_str() );
      throw x;
    }
  }

  class VoidType : public Type {
  public:

    VoidType( void ) :
      Type( ID_VOID, "void", 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 )
    {}

    virtual void avStartCall( av_alist& avList, 
			      void* fnPtr,
			      void* ) const;

    virtual void avPutArg( av_alist& avList, void* arg ) const;

    virtual const Type& getElmType( std::size_t idx ) const;
    virtual void* getElmAddr( void* obj, std::size_t idx ) const;
    virtual unsigned long hash( void ) const { return getId(); }
    virtual bool operator==( const Type& type ) const
    { return type.getId() == ID_VOID; }
  };

  void
  VoidType::avStartCall( av_alist& avList, 
			 void* fnPtr,
			 void* ) const
  {
    av_start_void( avList, fnPtr );
  }

  void
  VoidType::avPutArg( av_alist& avList, void* arg ) const
  {
    Exception x( X_AV_VOIDARG,
		 _("it's not allowed to pass a void argument to a reflected "\
		   "function.") );
    throw x;
  }

  const Type&
  VoidType::getElmType( std::size_t idx ) const
  {
    Exception x( X_NOELM,
		 _("cannot get element type for class \'void\'.") );
    throw x;
  }
  
  void* VoidType::getElmAddr( void* obj, std::size_t idx ) const
  {
    Exception x( X_NOELM,
		 _("cannot get element address for class \'void\'.") );
    throw x;
  }

  static VoidType theVoid_t;
  const Type& TypeVoid = theVoid_t;

} // namespace rfl