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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Scott Collins <scc@mozilla.org> (original author of nsCOMPtr)
+ * L. David Baron <dbaron@dbaron.org>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nsAutoPtr_h___
+#define nsAutoPtr_h___
+
+ // Wrapping includes can speed up compiles (see "Large Scale C++ Software Design")
+#ifndef nsCOMPtr_h___
+ // For |already_AddRefed|, |nsDerivedSafe|, |NSCAP_Zero|,
+ // |NSCAP_DONT_PROVIDE_NONCONST_OPEQ|,
+ // |NSCAP_FEATURE_INLINE_STARTASSIGNMENT|
+#include "nsCOMPtr.h"
+#endif
+
+/*****************************************************************************/
+
+// template <class T> class nsAutoPtrGetterTransfers;
+
+template <class T>
+class nsAutoPtr
+ {
+ private:
+ void**
+ begin_assignment()
+ {
+ assign(0);
+ return NS_REINTERPRET_CAST(void**, &mRawPtr);
+ }
+
+ void
+ assign( T* newPtr )
+ {
+ T* oldPtr = mRawPtr;
+ mRawPtr = newPtr;
+ delete oldPtr;
+ }
+
+ private:
+ T* mRawPtr;
+
+ public:
+ typedef T element_type;
+
+ ~nsAutoPtr()
+ {
+ delete mRawPtr;
+ }
+
+ // Constructors
+
+ nsAutoPtr()
+ : mRawPtr(0)
+ // default constructor
+ {
+ }
+
+ nsAutoPtr( T* aRawPtr )
+ : mRawPtr(aRawPtr)
+ // construct from a raw pointer (of the right type)
+ {
+ }
+
+ nsAutoPtr( nsAutoPtr<T>& aSmartPtr )
+ : mRawPtr( aSmartPtr.forget() )
+ // Construct by transferring ownership from another smart pointer.
+ {
+ }
+
+
+ // Assignment operators
+
+ nsAutoPtr<T>&
+ operator=( T* rhs )
+ // assign from a raw pointer (of the right type)
+ {
+ assign(rhs);
+ return *this;
+ }
+
+ nsAutoPtr<T>& operator=( nsAutoPtr<T>& rhs )
+ // assign by transferring ownership from another smart pointer.
+ {
+ assign(rhs.forget());
+ return *this;
+ }
+
+ // Other pointer operators
+
+ T*
+ get() const
+ /*
+ Prefer the implicit conversion provided automatically by
+ |operator T*() const|. Use |get()| _only_ to resolve
+ ambiguity.
+ */
+ {
+ return mRawPtr;
+ }
+
+ operator T*() const
+ /*
+ ...makes an |nsAutoPtr| act like its underlying raw pointer
+ type whenever it is used in a context where a raw pointer
+ is expected. It is this operator that makes an |nsAutoPtr|
+ substitutable for a raw pointer.
+
+ Prefer the implicit use of this operator to calling |get()|,
+ except where necessary to resolve ambiguity.
+ */
+ {
+ return get();
+ }
+
+ T*
+ forget()
+ {
+ T* temp = mRawPtr;
+ mRawPtr = 0;
+ return temp;
+ }
+
+ T*
+ operator->() const
+ {
+ NS_PRECONDITION(mRawPtr != 0, "You can't dereference a NULL nsAutoPtr with operator->().");
+ return get();
+ }
+
+#ifdef CANT_RESOLVE_CPP_CONST_AMBIGUITY
+ // broken version for IRIX
+
+ nsAutoPtr<T>*
+ get_address() const
+ // This is not intended to be used by clients. See |address_of|
+ // below.
+ {
+ return NS_CONST_CAST(nsAutoPtr<T>*, this);
+ }
+
+#else // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+ nsAutoPtr<T>*
+ get_address()
+ // This is not intended to be used by clients. See |address_of|
+ // below.
+ {
+ return this;
+ }
+
+ const nsAutoPtr<T>*
+ get_address() const
+ // This is not intended to be used by clients. See |address_of|
+ // below.
+ {
+ return this;
+ }
+
+#endif // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+ public:
+ T&
+ operator*() const
+ {
+ NS_PRECONDITION(mRawPtr != 0, "You can't dereference a NULL nsAutoPtr with operator*().");
+ return *get();
+ }
+
+ T**
+ StartAssignment()
+ {
+#ifndef NSCAP_FEATURE_INLINE_STARTASSIGNMENT
+ return NS_REINTERPRET_CAST(T**, begin_assignment());
+#else
+ assign(0);
+ return NS_REINTERPRET_CAST(T**, &mRawPtr);
+#endif
+ }
+ };
+
+#ifdef CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+// This is the broken version for IRIX, which can't handle the version below.
+
+template <class T>
+inline
+nsAutoPtr<T>*
+address_of( const nsAutoPtr<T>& aPtr )
+ {
+ return aPtr.get_address();
+ }
+
+#else // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+template <class T>
+inline
+nsAutoPtr<T>*
+address_of( nsAutoPtr<T>& aPtr )
+ {
+ return aPtr.get_address();
+ }
+
+template <class T>
+inline
+const nsAutoPtr<T>*
+address_of( const nsAutoPtr<T>& aPtr )
+ {
+ return aPtr.get_address();
+ }
+
+#endif // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+template <class T>
+class nsAutoPtrGetterTransfers
+ /*
+ ...
+
+ This class is designed to be used for anonymous temporary objects in the
+ argument list of calls that return COM interface pointers, e.g.,
+
+ nsAutoPtr<IFoo> fooP;
+ ...->GetTransferedPointer(getter_Transfers(fooP))
+
+ DO NOT USE THIS TYPE DIRECTLY IN YOUR CODE. Use |getter_Transfers()| instead.
+
+ When initialized with a |nsAutoPtr|, as in the example above, it returns
+ a |void**|, a |T**|, or an |nsISupports**| as needed, that the
+ outer call (|GetTransferedPointer| in this case) can fill in.
+
+ This type should be a nested class inside |nsAutoPtr<T>|.
+ */
+ {
+ public:
+ explicit
+ nsAutoPtrGetterTransfers( nsAutoPtr<T>& aSmartPtr )
+ : mTargetSmartPtr(aSmartPtr)
+ {
+ // nothing else to do
+ }
+
+ operator void**()
+ {
+ return NS_REINTERPRET_CAST(void**, mTargetSmartPtr.StartAssignment());
+ }
+
+ operator T**()
+ {
+ return mTargetSmartPtr.StartAssignment();
+ }
+
+ T*&
+ operator*()
+ {
+ return *(mTargetSmartPtr.StartAssignment());
+ }
+
+ private:
+ nsAutoPtr<T>& mTargetSmartPtr;
+ };
+
+template <class T>
+inline
+nsAutoPtrGetterTransfers<T>
+getter_Transfers( nsAutoPtr<T>& aSmartPtr )
+ /*
+ Used around a |nsAutoPtr| when
+ ...makes the class |nsAutoPtrGetterTransfers<T>| invisible.
+ */
+ {
+ return nsAutoPtrGetterTransfers<T>(aSmartPtr);
+ }
+
+
+
+ // Comparing two |nsAutoPtr|s
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const nsAutoPtr<T>& lhs, const nsAutoPtr<U>& rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) == NS_STATIC_CAST(const U*, rhs.get());
+ }
+
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const nsAutoPtr<T>& lhs, const nsAutoPtr<U>& rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) != NS_STATIC_CAST(const U*, rhs.get());
+ }
+
+
+ // Comparing an |nsAutoPtr| to a raw pointer
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const nsAutoPtr<T>& lhs, const U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) == NS_STATIC_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const U* lhs, const nsAutoPtr<T>& rhs )
+ {
+ return NS_STATIC_CAST(const U*, lhs) == NS_STATIC_CAST(const T*, rhs.get());
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const nsAutoPtr<T>& lhs, const U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) != NS_STATIC_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const U* lhs, const nsAutoPtr<T>& rhs )
+ {
+ return NS_STATIC_CAST(const U*, lhs) != NS_STATIC_CAST(const T*, rhs.get());
+ }
+
+ // To avoid ambiguities caused by the presence of builtin |operator==|s
+ // creating a situation where one of the |operator==| defined above
+ // has a better conversion for one argument and the builtin has a
+ // better conversion for the other argument, define additional
+ // |operator==| without the |const| on the raw pointer.
+ // See bug 65664 for details.
+
+#ifndef NSCAP_DONT_PROVIDE_NONCONST_OPEQ
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const nsAutoPtr<T>& lhs, U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) == NS_CONST_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( U* lhs, const nsAutoPtr<T>& rhs )
+ {
+ return NS_CONST_CAST(const U*, lhs) == NS_STATIC_CAST(const T*, rhs.get());
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const nsAutoPtr<T>& lhs, U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) != NS_CONST_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( U* lhs, const nsAutoPtr<T>& rhs )
+ {
+ return NS_CONST_CAST(const U*, lhs) != NS_STATIC_CAST(const T*, rhs.get());
+ }
+#endif
+
+
+
+ // Comparing an |nsAutoPtr| to |0|
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( const nsAutoPtr<T>& lhs, NSCAP_Zero* rhs )
+ // specifically to allow |smartPtr == 0|
+ {
+ return NS_STATIC_CAST(const void*, lhs.get()) == NS_REINTERPRET_CAST(const void*, rhs);
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( NSCAP_Zero* lhs, const nsAutoPtr<T>& rhs )
+ // specifically to allow |0 == smartPtr|
+ {
+ return NS_REINTERPRET_CAST(const void*, lhs) == NS_STATIC_CAST(const void*, rhs.get());
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator!=( const nsAutoPtr<T>& lhs, NSCAP_Zero* rhs )
+ // specifically to allow |smartPtr != 0|
+ {
+ return NS_STATIC_CAST(const void*, lhs.get()) != NS_REINTERPRET_CAST(const void*, rhs);
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator!=( NSCAP_Zero* lhs, const nsAutoPtr<T>& rhs )
+ // specifically to allow |0 != smartPtr|
+ {
+ return NS_REINTERPRET_CAST(const void*, lhs) != NS_STATIC_CAST(const void*, rhs.get());
+ }
+
+
+#ifdef HAVE_CPP_TROUBLE_COMPARING_TO_ZERO
+
+ // We need to explicitly define comparison operators for `int'
+ // because the compiler is lame.
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( const nsAutoPtr<T>& lhs, int rhs )
+ // specifically to allow |smartPtr == 0|
+ {
+ return NS_STATIC_CAST(const void*, lhs.get()) == NS_REINTERPRET_CAST(const void*, rhs);
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( int lhs, const nsAutoPtr<T>& rhs )
+ // specifically to allow |0 == smartPtr|
+ {
+ return NS_REINTERPRET_CAST(const void*, lhs) == NS_STATIC_CAST(const void*, rhs.get());
+ }
+
+#endif // !defined(HAVE_CPP_TROUBLE_COMPARING_TO_ZERO)
+
+/*****************************************************************************/
+
+// template <class T> class nsAutoArrayPtrGetterTransfers;
+
+template <class T>
+class nsAutoArrayPtr
+ {
+ private:
+ void**
+ begin_assignment()
+ {
+ assign(0);
+ return NS_REINTERPRET_CAST(void**, &mRawPtr);
+ }
+
+ void
+ assign( T* newPtr )
+ {
+ T* oldPtr = mRawPtr;
+ mRawPtr = newPtr;
+ delete [] oldPtr;
+ }
+
+ private:
+ T* mRawPtr;
+
+ public:
+ typedef T element_type;
+
+ ~nsAutoArrayPtr()
+ {
+ delete [] mRawPtr;
+ }
+
+ // Constructors
+
+ nsAutoArrayPtr()
+ : mRawPtr(0)
+ // default constructor
+ {
+ }
+
+ nsAutoArrayPtr( T* aRawPtr )
+ : mRawPtr(aRawPtr)
+ // construct from a raw pointer (of the right type)
+ {
+ }
+
+ nsAutoArrayPtr( nsAutoArrayPtr<T>& aSmartPtr )
+ : mRawPtr( aSmartPtr.forget() )
+ // Construct by transferring ownership from another smart pointer.
+ {
+ }
+
+
+ // Assignment operators
+
+ nsAutoArrayPtr<T>&
+ operator=( T* rhs )
+ // assign from a raw pointer (of the right type)
+ {
+ assign(rhs);
+ return *this;
+ }
+
+ nsAutoArrayPtr<T>& operator=( nsAutoArrayPtr<T>& rhs )
+ // assign by transferring ownership from another smart pointer.
+ {
+ assign(rhs.forget());
+ return *this;
+ }
+
+ // Other pointer operators
+
+ T*
+ get() const
+ /*
+ Prefer the implicit conversion provided automatically by
+ |operator T*() const|. Use |get()| _only_ to resolve
+ ambiguity.
+ */
+ {
+ return mRawPtr;
+ }
+
+ operator T*() const
+ /*
+ ...makes an |nsAutoArrayPtr| act like its underlying raw pointer
+ type whenever it is used in a context where a raw pointer
+ is expected. It is this operator that makes an |nsAutoArrayPtr|
+ substitutable for a raw pointer.
+
+ Prefer the implicit use of this operator to calling |get()|,
+ except where necessary to resolve ambiguity.
+ */
+ {
+ return get();
+ }
+
+ T*
+ forget()
+ {
+ T* temp = mRawPtr;
+ mRawPtr = 0;
+ return temp;
+ }
+
+ T*
+ operator->() const
+ {
+ NS_PRECONDITION(mRawPtr != 0, "You can't dereference a NULL nsAutoArrayPtr with operator->().");
+ return get();
+ }
+
+#ifdef CANT_RESOLVE_CPP_CONST_AMBIGUITY
+ // broken version for IRIX
+
+ nsAutoArrayPtr<T>*
+ get_address() const
+ // This is not intended to be used by clients. See |address_of|
+ // below.
+ {
+ return NS_CONST_CAST(nsAutoArrayPtr<T>*, this);
+ }
+
+#else // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+ nsAutoArrayPtr<T>*
+ get_address()
+ // This is not intended to be used by clients. See |address_of|
+ // below.
+ {
+ return this;
+ }
+
+ const nsAutoArrayPtr<T>*
+ get_address() const
+ // This is not intended to be used by clients. See |address_of|
+ // below.
+ {
+ return this;
+ }
+
+#endif // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+ public:
+ T&
+ operator*() const
+ {
+ NS_PRECONDITION(mRawPtr != 0, "You can't dereference a NULL nsAutoArrayPtr with operator*().");
+ return *get();
+ }
+
+ T**
+ StartAssignment()
+ {
+#ifndef NSCAP_FEATURE_INLINE_STARTASSIGNMENT
+ return NS_REINTERPRET_CAST(T**, begin_assignment());
+#else
+ assign(0);
+ return NS_REINTERPRET_CAST(T**, &mRawPtr);
+#endif
+ }
+ };
+
+#ifdef CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+// This is the broken version for IRIX, which can't handle the version below.
+
+template <class T>
+inline
+nsAutoArrayPtr<T>*
+address_of( const nsAutoArrayPtr<T>& aPtr )
+ {
+ return aPtr.get_address();
+ }
+
+#else // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+template <class T>
+inline
+nsAutoArrayPtr<T>*
+address_of( nsAutoArrayPtr<T>& aPtr )
+ {
+ return aPtr.get_address();
+ }
+
+template <class T>
+inline
+const nsAutoArrayPtr<T>*
+address_of( const nsAutoArrayPtr<T>& aPtr )
+ {
+ return aPtr.get_address();
+ }
+
+#endif // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+template <class T>
+class nsAutoArrayPtrGetterTransfers
+ /*
+ ...
+
+ This class is designed to be used for anonymous temporary objects in the
+ argument list of calls that return COM interface pointers, e.g.,
+
+ nsAutoArrayPtr<IFoo> fooP;
+ ...->GetTransferedPointer(getter_Transfers(fooP))
+
+ DO NOT USE THIS TYPE DIRECTLY IN YOUR CODE. Use |getter_Transfers()| instead.
+
+ When initialized with a |nsAutoArrayPtr|, as in the example above, it returns
+ a |void**|, a |T**|, or an |nsISupports**| as needed, that the
+ outer call (|GetTransferedPointer| in this case) can fill in.
+
+ This type should be a nested class inside |nsAutoArrayPtr<T>|.
+ */
+ {
+ public:
+ explicit
+ nsAutoArrayPtrGetterTransfers( nsAutoArrayPtr<T>& aSmartPtr )
+ : mTargetSmartPtr(aSmartPtr)
+ {
+ // nothing else to do
+ }
+
+ operator void**()
+ {
+ return NS_REINTERPRET_CAST(void**, mTargetSmartPtr.StartAssignment());
+ }
+
+ operator T**()
+ {
+ return mTargetSmartPtr.StartAssignment();
+ }
+
+ T*&
+ operator*()
+ {
+ return *(mTargetSmartPtr.StartAssignment());
+ }
+
+ private:
+ nsAutoArrayPtr<T>& mTargetSmartPtr;
+ };
+
+template <class T>
+inline
+nsAutoArrayPtrGetterTransfers<T>
+getter_Transfers( nsAutoArrayPtr<T>& aSmartPtr )
+ /*
+ Used around a |nsAutoArrayPtr| when
+ ...makes the class |nsAutoArrayPtrGetterTransfers<T>| invisible.
+ */
+ {
+ return nsAutoArrayPtrGetterTransfers<T>(aSmartPtr);
+ }
+
+
+
+ // Comparing two |nsAutoArrayPtr|s
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const nsAutoArrayPtr<T>& lhs, const nsAutoArrayPtr<U>& rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) == NS_STATIC_CAST(const U*, rhs.get());
+ }
+
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const nsAutoArrayPtr<T>& lhs, const nsAutoArrayPtr<U>& rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) != NS_STATIC_CAST(const U*, rhs.get());
+ }
+
+
+ // Comparing an |nsAutoArrayPtr| to a raw pointer
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const nsAutoArrayPtr<T>& lhs, const U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) == NS_STATIC_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const U* lhs, const nsAutoArrayPtr<T>& rhs )
+ {
+ return NS_STATIC_CAST(const U*, lhs) == NS_STATIC_CAST(const T*, rhs.get());
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const nsAutoArrayPtr<T>& lhs, const U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) != NS_STATIC_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const U* lhs, const nsAutoArrayPtr<T>& rhs )
+ {
+ return NS_STATIC_CAST(const U*, lhs) != NS_STATIC_CAST(const T*, rhs.get());
+ }
+
+ // To avoid ambiguities caused by the presence of builtin |operator==|s
+ // creating a situation where one of the |operator==| defined above
+ // has a better conversion for one argument and the builtin has a
+ // better conversion for the other argument, define additional
+ // |operator==| without the |const| on the raw pointer.
+ // See bug 65664 for details.
+
+#ifndef NSCAP_DONT_PROVIDE_NONCONST_OPEQ
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const nsAutoArrayPtr<T>& lhs, U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) == NS_CONST_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( U* lhs, const nsAutoArrayPtr<T>& rhs )
+ {
+ return NS_CONST_CAST(const U*, lhs) == NS_STATIC_CAST(const T*, rhs.get());
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const nsAutoArrayPtr<T>& lhs, U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) != NS_CONST_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( U* lhs, const nsAutoArrayPtr<T>& rhs )
+ {
+ return NS_CONST_CAST(const U*, lhs) != NS_STATIC_CAST(const T*, rhs.get());
+ }
+#endif
+
+
+
+ // Comparing an |nsAutoArrayPtr| to |0|
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( const nsAutoArrayPtr<T>& lhs, NSCAP_Zero* rhs )
+ // specifically to allow |smartPtr == 0|
+ {
+ return NS_STATIC_CAST(const void*, lhs.get()) == NS_REINTERPRET_CAST(const void*, rhs);
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( NSCAP_Zero* lhs, const nsAutoArrayPtr<T>& rhs )
+ // specifically to allow |0 == smartPtr|
+ {
+ return NS_REINTERPRET_CAST(const void*, lhs) == NS_STATIC_CAST(const void*, rhs.get());
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator!=( const nsAutoArrayPtr<T>& lhs, NSCAP_Zero* rhs )
+ // specifically to allow |smartPtr != 0|
+ {
+ return NS_STATIC_CAST(const void*, lhs.get()) != NS_REINTERPRET_CAST(const void*, rhs);
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator!=( NSCAP_Zero* lhs, const nsAutoArrayPtr<T>& rhs )
+ // specifically to allow |0 != smartPtr|
+ {
+ return NS_REINTERPRET_CAST(const void*, lhs) != NS_STATIC_CAST(const void*, rhs.get());
+ }
+
+
+#ifdef HAVE_CPP_TROUBLE_COMPARING_TO_ZERO
+
+ // We need to explicitly define comparison operators for `int'
+ // because the compiler is lame.
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( const nsAutoArrayPtr<T>& lhs, int rhs )
+ // specifically to allow |smartPtr == 0|
+ {
+ return NS_STATIC_CAST(const void*, lhs.get()) == NS_REINTERPRET_CAST(const void*, rhs);
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( int lhs, const nsAutoArrayPtr<T>& rhs )
+ // specifically to allow |0 == smartPtr|
+ {
+ return NS_REINTERPRET_CAST(const void*, lhs) == NS_STATIC_CAST(const void*, rhs.get());
+ }
+
+#endif // !defined(HAVE_CPP_TROUBLE_COMPARING_TO_ZERO)
+
+
+/*****************************************************************************/
+
+// template <class T> class nsRefPtrGetterAddRefs;
+
+template <class T>
+class nsRefPtr
+ {
+ private:
+
+ void
+ assign_with_AddRef( T* rawPtr )
+ {
+ if ( rawPtr )
+ rawPtr->AddRef();
+ assign_assuming_AddRef(rawPtr);
+ }
+
+ void**
+ begin_assignment()
+ {
+ assign_assuming_AddRef(0);
+ return NS_REINTERPRET_CAST(void**, &mRawPtr);
+ }
+
+ void
+ assign_assuming_AddRef( T* newPtr )
+ {
+ T* oldPtr = mRawPtr;
+ mRawPtr = newPtr;
+ if ( oldPtr )
+ oldPtr->Release();
+ }
+
+ private:
+ T* mRawPtr;
+
+ public:
+ typedef T element_type;
+
+ ~nsRefPtr()
+ {
+ if ( mRawPtr )
+ mRawPtr->Release();
+ }
+
+ // Constructors
+
+ nsRefPtr()
+ : mRawPtr(0)
+ // default constructor
+ {
+ }
+
+ nsRefPtr( const nsRefPtr<T>& aSmartPtr )
+ : mRawPtr(aSmartPtr.mRawPtr)
+ // copy-constructor
+ {
+ if ( mRawPtr )
+ mRawPtr->AddRef();
+ }
+
+ nsRefPtr( T* aRawPtr )
+ : mRawPtr(aRawPtr)
+ // construct from a raw pointer (of the right type)
+ {
+ if ( mRawPtr )
+ mRawPtr->AddRef();
+ }
+
+ nsRefPtr( const already_AddRefed<T>& aSmartPtr )
+ : mRawPtr(aSmartPtr.mRawPtr)
+ // construct from |dont_AddRef(expr)|
+ {
+ }
+
+ // Assignment operators
+
+ nsRefPtr<T>&
+ operator=( const nsRefPtr<T>& rhs )
+ // copy assignment operator
+ {
+ assign_with_AddRef(rhs.mRawPtr);
+ return *this;
+ }
+
+ nsRefPtr<T>&
+ operator=( T* rhs )
+ // assign from a raw pointer (of the right type)
+ {
+ assign_with_AddRef(rhs);
+ return *this;
+ }
+
+ nsRefPtr<T>&
+ operator=( const already_AddRefed<T>& rhs )
+ // assign from |dont_AddRef(expr)|
+ {
+ assign_assuming_AddRef(rhs.mRawPtr);
+ return *this;
+ }
+
+ // Other pointer operators
+
+ void
+ swap( nsRefPtr<T>& rhs )
+ // ...exchange ownership with |rhs|; can save a pair of refcount operations
+ {
+ T* temp = rhs.mRawPtr;
+ rhs.mRawPtr = mRawPtr;
+ mRawPtr = temp;
+ }
+
+ void
+ swap( T*& rhs )
+ // ...exchange ownership with |rhs|; can save a pair of refcount operations
+ {
+ T* temp = rhs;
+ rhs = mRawPtr;
+ mRawPtr = temp;
+ }
+
+ nsDerivedSafe<T>*
+ get() const
+ /*
+ Prefer the implicit conversion provided automatically by |operator nsDerivedSafe<T>*() const|.
+ Use |get()| _only_ to resolve ambiguity.
+
+ Returns a |nsDerivedSafe<T>*| to deny clients the use of |AddRef| and |Release|.
+ */
+ {
+ return NS_CONST_CAST(nsDerivedSafe<T>*,
+ NS_REINTERPRET_CAST(const nsDerivedSafe<T>*, mRawPtr));
+ }
+
+ operator nsDerivedSafe<T>*() const
+ /*
+ ...makes an |nsRefPtr| act like its underlying raw pointer type (except against |AddRef()|, |Release()|,
+ and |delete|) whenever it is used in a context where a raw pointer is expected. It is this operator
+ that makes an |nsRefPtr| substitutable for a raw pointer.
+
+ Prefer the implicit use of this operator to calling |get()|, except where necessary to resolve ambiguity.
+ */
+ {
+ return get();
+ }
+
+ nsDerivedSafe<T>*
+ operator->() const
+ {
+ NS_PRECONDITION(mRawPtr != 0, "You can't dereference a NULL nsRefPtr with operator->().");
+ return get();
+ }
+
+#ifdef CANT_RESOLVE_CPP_CONST_AMBIGUITY
+ // broken version for IRIX
+
+ nsRefPtr<T>*
+ get_address() const
+ // This is not intended to be used by clients. See |address_of|
+ // below.
+ {
+ return NS_CONST_CAST(nsRefPtr<T>*, this);
+ }
+
+#else // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+ nsRefPtr<T>*
+ get_address()
+ // This is not intended to be used by clients. See |address_of|
+ // below.
+ {
+ return this;
+ }
+
+ const nsRefPtr<T>*
+ get_address() const
+ // This is not intended to be used by clients. See |address_of|
+ // below.
+ {
+ return this;
+ }
+
+#endif // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+ public:
+ nsDerivedSafe<T>&
+ operator*() const
+ {
+ NS_PRECONDITION(mRawPtr != 0, "You can't dereference a NULL nsRefPtr with operator*().");
+ return *get();
+ }
+
+ T**
+ StartAssignment()
+ {
+#ifndef NSCAP_FEATURE_INLINE_STARTASSIGNMENT
+ return NS_REINTERPRET_CAST(T**, begin_assignment());
+#else
+ assign_assuming_AddRef(0);
+ return NS_REINTERPRET_CAST(T**, &mRawPtr);
+#endif
+ }
+ };
+
+#ifdef CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+// This is the broken version for IRIX, which can't handle the version below.
+
+template <class T>
+inline
+nsRefPtr<T>*
+address_of( const nsRefPtr<T>& aPtr )
+ {
+ return aPtr.get_address();
+ }
+
+#else // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+template <class T>
+inline
+nsRefPtr<T>*
+address_of( nsRefPtr<T>& aPtr )
+ {
+ return aPtr.get_address();
+ }
+
+template <class T>
+inline
+const nsRefPtr<T>*
+address_of( const nsRefPtr<T>& aPtr )
+ {
+ return aPtr.get_address();
+ }
+
+#endif // CANT_RESOLVE_CPP_CONST_AMBIGUITY
+
+template <class T>
+class nsRefPtrGetterAddRefs
+ /*
+ ...
+
+ This class is designed to be used for anonymous temporary objects in the
+ argument list of calls that return COM interface pointers, e.g.,
+
+ nsRefPtr<IFoo> fooP;
+ ...->GetAddRefedPointer(getter_AddRefs(fooP))
+
+ DO NOT USE THIS TYPE DIRECTLY IN YOUR CODE. Use |getter_AddRefs()| instead.
+
+ When initialized with a |nsRefPtr|, as in the example above, it returns
+ a |void**|, a |T**|, or an |nsISupports**| as needed, that the
+ outer call (|GetAddRefedPointer| in this case) can fill in.
+
+ This type should be a nested class inside |nsRefPtr<T>|.
+ */
+ {
+ public:
+ explicit
+ nsRefPtrGetterAddRefs( nsRefPtr<T>& aSmartPtr )
+ : mTargetSmartPtr(aSmartPtr)
+ {
+ // nothing else to do
+ }
+
+ operator void**()
+ {
+ return NS_REINTERPRET_CAST(void**, mTargetSmartPtr.StartAssignment());
+ }
+
+ operator T**()
+ {
+ return mTargetSmartPtr.StartAssignment();
+ }
+
+ T*&
+ operator*()
+ {
+ return *(mTargetSmartPtr.StartAssignment());
+ }
+
+ private:
+ nsRefPtr<T>& mTargetSmartPtr;
+ };
+
+template <class T>
+inline
+nsRefPtrGetterAddRefs<T>
+getter_AddRefs( nsRefPtr<T>& aSmartPtr )
+ /*
+ Used around a |nsRefPtr| when
+ ...makes the class |nsRefPtrGetterAddRefs<T>| invisible.
+ */
+ {
+ return nsRefPtrGetterAddRefs<T>(aSmartPtr);
+ }
+
+
+
+ // Comparing two |nsRefPtr|s
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const nsRefPtr<T>& lhs, const nsRefPtr<U>& rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) == NS_STATIC_CAST(const U*, rhs.get());
+ }
+
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const nsRefPtr<T>& lhs, const nsRefPtr<U>& rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) != NS_STATIC_CAST(const U*, rhs.get());
+ }
+
+
+ // Comparing an |nsRefPtr| to a raw pointer
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const nsRefPtr<T>& lhs, const U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) == NS_STATIC_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const U* lhs, const nsRefPtr<T>& rhs )
+ {
+ return NS_STATIC_CAST(const U*, lhs) == NS_STATIC_CAST(const T*, rhs.get());
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const nsRefPtr<T>& lhs, const U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) != NS_STATIC_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const U* lhs, const nsRefPtr<T>& rhs )
+ {
+ return NS_STATIC_CAST(const U*, lhs) != NS_STATIC_CAST(const T*, rhs.get());
+ }
+
+ // To avoid ambiguities caused by the presence of builtin |operator==|s
+ // creating a situation where one of the |operator==| defined above
+ // has a better conversion for one argument and the builtin has a
+ // better conversion for the other argument, define additional
+ // |operator==| without the |const| on the raw pointer.
+ // See bug 65664 for details.
+
+#ifndef NSCAP_DONT_PROVIDE_NONCONST_OPEQ
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( const nsRefPtr<T>& lhs, U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) == NS_CONST_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator==( U* lhs, const nsRefPtr<T>& rhs )
+ {
+ return NS_CONST_CAST(const U*, lhs) == NS_STATIC_CAST(const T*, rhs.get());
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( const nsRefPtr<T>& lhs, U* rhs )
+ {
+ return NS_STATIC_CAST(const T*, lhs.get()) != NS_CONST_CAST(const U*, rhs);
+ }
+
+template <class T, class U>
+inline
+NSCAP_BOOL
+operator!=( U* lhs, const nsRefPtr<T>& rhs )
+ {
+ return NS_CONST_CAST(const U*, lhs) != NS_STATIC_CAST(const T*, rhs.get());
+ }
+#endif
+
+
+
+ // Comparing an |nsRefPtr| to |0|
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( const nsRefPtr<T>& lhs, NSCAP_Zero* rhs )
+ // specifically to allow |smartPtr == 0|
+ {
+ return NS_STATIC_CAST(const void*, lhs.get()) == NS_REINTERPRET_CAST(const void*, rhs);
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( NSCAP_Zero* lhs, const nsRefPtr<T>& rhs )
+ // specifically to allow |0 == smartPtr|
+ {
+ return NS_REINTERPRET_CAST(const void*, lhs) == NS_STATIC_CAST(const void*, rhs.get());
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator!=( const nsRefPtr<T>& lhs, NSCAP_Zero* rhs )
+ // specifically to allow |smartPtr != 0|
+ {
+ return NS_STATIC_CAST(const void*, lhs.get()) != NS_REINTERPRET_CAST(const void*, rhs);
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator!=( NSCAP_Zero* lhs, const nsRefPtr<T>& rhs )
+ // specifically to allow |0 != smartPtr|
+ {
+ return NS_REINTERPRET_CAST(const void*, lhs) != NS_STATIC_CAST(const void*, rhs.get());
+ }
+
+
+#ifdef HAVE_CPP_TROUBLE_COMPARING_TO_ZERO
+
+ // We need to explicitly define comparison operators for `int'
+ // because the compiler is lame.
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( const nsRefPtr<T>& lhs, int rhs )
+ // specifically to allow |smartPtr == 0|
+ {
+ return NS_STATIC_CAST(const void*, lhs.get()) == NS_REINTERPRET_CAST(const void*, rhs);
+ }
+
+template <class T>
+inline
+NSCAP_BOOL
+operator==( int lhs, const nsRefPtr<T>& rhs )
+ // specifically to allow |0 == smartPtr|
+ {
+ return NS_REINTERPRET_CAST(const void*, lhs) == NS_STATIC_CAST(const void*, rhs.get());
+ }
+
+#endif // !defined(HAVE_CPP_TROUBLE_COMPARING_TO_ZERO)
+
+/*****************************************************************************/
+
+#endif // !defined(nsAutoPtr_h___)