Attribute.hh

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#ifndef ATTRIBUTE_HH
#define ATTRIBUTE_HH

//---------------------------------------------------------------------------
// Copyright (c) 2004-2005 Clifton Labs, Inc. All Rights Reserved.

// You may modify, distribute, and use the software contained in this package
// under the terms of the "GNU LIBRARY GENERAL PUBLIC LICENSE" version 2,
// June 1991. A copy of this license agreement can be found in the file
// "LGPL", distributed with this archive.

//---------------------------------------------------------------------------

class SignalBase;

enum AttribType { LAST_EVENT, EVENT, ACTIVE, LAST_ACTIVE, LAST_VALUE, 
                  DRIVING, DRIVING_VALUE, QUIET, STABLE, TRANSACTION,
                  INVALID};

class Attribute {
public:
  Attribute( AttribType initType, SignalBase &initSignal ) :
    myAttrib( initType ), mySignal( initSignal ){}

  SignalBase &getSignal() const { return mySignal; }
  AttribType getType() const { return myAttrib; }

private:
  AttribType myAttrib;
  SignalBase &mySignal;
};

inline ostream & 
operator << (ostream &os, const Attribute &at) {
  switch( at.getType() ) {
  case EVENT:
  case ACTIVE:
  case LAST_VALUE:
  case DRIVING:
  case DRIVING_VALUE:
    os << "Driving_Value Attribute";
    break;
  case LAST_ACTIVE:
  case LAST_EVENT:
    os << "Last_Event attribute";;
    break;
  case STABLE:
  case QUIET:
  case TRANSACTION:
    break;
  default:
    os << "(invalid attribute)";
    break;
  }
  return os;
}

inline ostream &
operator << (ostream &os, const AttribType &at) {
  switch(at) {
  case EVENT:
    os << "EVENT";
    break;
  case ACTIVE:
    os << "ACTIVE";
    break;
  case LAST_EVENT:
    os << "LAST_EVENT";
    break;
  case LAST_ACTIVE:
    os << "LAST_ACTIVE";
    break;
  case LAST_VALUE:
    os << "LAST_VALUE";
    break;
  case DRIVING:
    os << "DRIVING";
    break;
  case DRIVING_VALUE:
    os << "DRIVING_VALUE";
    break;
  case STABLE:
    os << "STABLE";
    break;
  case QUIET:
    os << "QUIET";
    break;
  case TRANSACTION:
    os << "TRANSACTION";
    break;
  default:
    os << "(invalid attribute type)";
    break;
  }
  return os;
}

#endif

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