nsisupportsimpl.h

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/**
 * This implements query interface with two assumptions: First, the
 * class in question implements nsISupports and its own interface and
 * nothing else. Second, the implementation of the class's primary
 * inheritance chain leads to its own interface.
 *
 * @param _class The name of the class implementing the method
 * @param _classiiddef The name of the #define symbol that defines the IID
 * for the class (e.g. NS_ISUPPORTS_IID)
 */

#define NS_IMPL_QUERY_HEAD(_class)                                            \
NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr)      \
{                                                                             \
  NS_ASSERTION(aInstancePtr,                                                  \
               "QueryInterface requires a non-NULL destination!");            \
  nsISupports* foundInterface;

#define NS_IMPL_QUERY_BODY(_interface)                                        \
  if ( aIID.Equals(NS_GET_IID(_interface)) )                                  \
    foundInterface = NS_STATIC_CAST(_interface*, this);                       \
  else

#define NS_IMPL_QUERY_BODY_CONDITIONAL(_interface, condition)                 \
  if ( (condition) && aIID.Equals(NS_GET_IID(_interface)))                    \
    foundInterface = NS_STATIC_CAST(_interface*, this);                       \
  else

#define NS_IMPL_QUERY_BODY_AMBIGUOUS(_interface, _implClass)                  \
  if ( aIID.Equals(NS_GET_IID(_interface)) )                                  \
    foundInterface = NS_STATIC_CAST(_interface*,                              \
                                    NS_STATIC_CAST(_implClass*, this));       \
  else

#define NS_IMPL_QUERY_BODY_AGGREGATED(_interface, _aggregate)                 \
  if ( aIID.Equals(NS_GET_IID(_interface)) )                                  \
    foundInterface = NS_STATIC_CAST(_interface*, _aggregate);                 \
  else

#define NS_IMPL_QUERY_TAIL_GUTS                                               \
    foundInterface = 0;                                                       \
  nsresult status;                                                            \
  if ( !foundInterface )                                                      \
    status = NS_NOINTERFACE;                                                  \
  else                                                                        \
    {                                                                         \
      NS_ADDREF(foundInterface);                                              \
      status = NS_OK;                                                         \
    }                                                                         \
  *aInstancePtr = foundInterface;                                             \
  return status;                                                              \
}

#define NS_IMPL_QUERY_TAIL_INHERITING(_baseclass)                             \
    foundInterface = 0;                                                       \
  nsresult status;                                                            \
  if ( !foundInterface )                                                      \
    status = _baseclass::QueryInterface(aIID, (void**)&foundInterface);       \
  else                                                                        \
    {                                                                         \
      NS_ADDREF(foundInterface);                                              \
      status = NS_OK;                                                         \
    }                                                                         \
  *aInstancePtr = foundInterface;                                             \
  return status;                                                              \
}

#define NS_IMPL_QUERY_TAIL_USING_AGGREGATOR(_aggregator)                      \
    foundInterface = 0;                                                       \
  nsresult status;                                                            \
  if ( !foundInterface ) {                                                    \
    NS_ASSERTION(_aggregator, "null aggregator");                             \
    status = _aggregator->QueryInterface(aIID, (void**)&foundInterface);      \
  } else                                                                      \
    {                                                                         \
      NS_ADDREF(foundInterface);                                              \
      status = NS_OK;                                                         \
    }                                                                         \
  *aInstancePtr = foundInterface;                                             \
  return status;                                                              \
}

#define NS_IMPL_QUERY_TAIL(_supports_interface)                               \
  NS_IMPL_QUERY_BODY_AMBIGUOUS(nsISupports, _supports_interface)              \
  NS_IMPL_QUERY_TAIL_GUTS


  /*
    This is the new scheme.  Using this notation now will allow us to switch to
    a table driven mechanism when it's ready.  Note the difference between this
    and the (currently) underlying NS_IMPL_QUERY_INTERFACE mechanism.  You must
    explicitly mention |nsISupports| when using the interface maps.
  */
#define NS_INTERFACE_MAP_BEGIN(_implClass)      NS_IMPL_QUERY_HEAD(_implClass)
#define NS_INTERFACE_MAP_ENTRY(_interface)      NS_IMPL_QUERY_BODY(_interface)
#define NS_INTERFACE_MAP_ENTRY_CONDITIONAL(_interface, condition)             \
  NS_IMPL_QUERY_BODY_CONDITIONAL(_interface, condition)
#define NS_INTERFACE_MAP_ENTRY_AGGREGATED(_interface,_aggregate)              \
  NS_IMPL_QUERY_BODY_AGGREGATED(_interface,_aggregate)

#define NS_INTERFACE_MAP_END                    NS_IMPL_QUERY_TAIL_GUTS
#define NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(_interface, _implClass)              \
  NS_IMPL_QUERY_BODY_AMBIGUOUS(_interface, _implClass)
#define NS_INTERFACE_MAP_END_INHERITING(_baseClass)                           \
  NS_IMPL_QUERY_TAIL_INHERITING(_baseClass)
#define NS_INTERFACE_MAP_END_AGGREGATED(_aggregator)                          \
  NS_IMPL_QUERY_TAIL_USING_AGGREGATOR(_aggregator)

#define NS_IMPL_QUERY_INTERFACE0(_class)                                      \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(nsISupports)                                       \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE1(_class, _i1)                                 \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE2(_class, _i1, _i2)                            \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY(_i2)                                               \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE3(_class, _i1, _i2, _i3)                       \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY(_i2)                                               \
    NS_INTERFACE_MAP_ENTRY(_i3)                                               \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE4(_class, _i1, _i2, _i3, _i4)                  \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY(_i2)                                               \
    NS_INTERFACE_MAP_ENTRY(_i3)                                               \
    NS_INTERFACE_MAP_ENTRY(_i4)                                               \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE5(_class, _i1, _i2, _i3, _i4, _i5)             \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY(_i2)                                               \
    NS_INTERFACE_MAP_ENTRY(_i3)                                               \
    NS_INTERFACE_MAP_ENTRY(_i4)                                               \
    NS_INTERFACE_MAP_ENTRY(_i5)                                               \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE6(_class, _i1, _i2, _i3, _i4, _i5, _i6)        \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY(_i2)                                               \
    NS_INTERFACE_MAP_ENTRY(_i3)                                               \
    NS_INTERFACE_MAP_ENTRY(_i4)                                               \
    NS_INTERFACE_MAP_ENTRY(_i5)                                               \
    NS_INTERFACE_MAP_ENTRY(_i6)                                               \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE7(_class, _i1, _i2, _i3, _i4, _i5, _i6, _i7)   \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY(_i2)                                               \
    NS_INTERFACE_MAP_ENTRY(_i3)                                               \
    NS_INTERFACE_MAP_ENTRY(_i4)                                               \
    NS_INTERFACE_MAP_ENTRY(_i5)                                               \
    NS_INTERFACE_MAP_ENTRY(_i6)                                               \
    NS_INTERFACE_MAP_ENTRY(_i7)                                               \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE8(_class, _i1, _i2, _i3, _i4, _i5, _i6,        \
                                 _i7, _i8)                                    \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY(_i2)                                               \
    NS_INTERFACE_MAP_ENTRY(_i3)                                               \
    NS_INTERFACE_MAP_ENTRY(_i4)                                               \
    NS_INTERFACE_MAP_ENTRY(_i5)                                               \
    NS_INTERFACE_MAP_ENTRY(_i6)                                               \
    NS_INTERFACE_MAP_ENTRY(_i7)                                               \
    NS_INTERFACE_MAP_ENTRY(_i8)                                               \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE9(_class, _i1, _i2, _i3, _i4, _i5, _i6,        \
                                 _i7, _i8, _i9)                               \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY(_i2)                                               \
    NS_INTERFACE_MAP_ENTRY(_i3)                                               \
    NS_INTERFACE_MAP_ENTRY(_i4)                                               \
    NS_INTERFACE_MAP_ENTRY(_i5)                                               \
    NS_INTERFACE_MAP_ENTRY(_i6)                                               \
    NS_INTERFACE_MAP_ENTRY(_i7)                                               \
    NS_INTERFACE_MAP_ENTRY(_i8)                                               \
    NS_INTERFACE_MAP_ENTRY(_i9)                                               \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE10(_class, _i1, _i2, _i3, _i4, _i5, _i6,       \
                                  _i7, _i8, _i9, _i10)                        \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \
    NS_INTERFACE_MAP_ENTRY(_i1)                                               \
    NS_INTERFACE_MAP_ENTRY(_i2)                                               \
    NS_INTERFACE_MAP_ENTRY(_i3)                                               \
    NS_INTERFACE_MAP_ENTRY(_i4)                                               \
    NS_INTERFACE_MAP_ENTRY(_i5)                                               \
    NS_INTERFACE_MAP_ENTRY(_i6)                                               \
    NS_INTERFACE_MAP_ENTRY(_i7)                                               \
    NS_INTERFACE_MAP_ENTRY(_i8)                                               \
    NS_INTERFACE_MAP_ENTRY(_i9)                                               \
    NS_INTERFACE_MAP_ENTRY(_i10)                                              \
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, _i1)                        \
  NS_INTERFACE_MAP_END

#define NS_IMPL_QUERY_INTERFACE11(_class, _i1, _i2, _i3, _i4, _i5, _i6,       \
                                  _i7, _i8, _i9, _i10, _i11)                  \
  NS_INTERFACE_MAP_BEGIN(_class)                                              \