Add KBOOT.

apps/elftosb/common/smart_ptr.h

@@ -0,0 +1,218 @@
+/*
+ *  smart_ptr.h
+ *  elftosb
+ *
+ *  Created by Chris Reed on 4/18/06.
+ *  Copyright 2006 __MyCompanyName__. All rights reserved.
+ *
+ */
+#if !defined(_smart_ptr_h_)
+#define _smart_ptr_h_
+
+/*!
+ * \brief Simple, standard smart pointer class.
+ *
+ * This class only supports the single-owner paradigm.
+ */
+template <typename T>
+class smart_ptr
+{
+public:
+    typedef T data_type;
+    typedef T *ptr_type;
+    typedef const T *const_ptr_type;
+    typedef T &ref_type;
+    typedef const T &const_ref_type;
+
+    //! Default constuctor. Initialises with no pointer set.
+    smart_ptr()
+        : _p(0)
+    {
+    }
+
+    //! This constructor takes a pointer to the object to be deleted.
+    smart_ptr(ptr_type p)
+        : _p(p)
+    {
+    }
+
+    //! Destructor. If an object (pointer) has been set, it will be deleted.
+    //! Deletes the object using safe_delete().
+    virtual ~smart_ptr() { safe_delete(); }
+    //! Return the current pointer value.
+    ptr_type get() { return _p; }
+    //! Return the const form of the current pointer value.
+    const_ptr_type get() const { return _p; }
+    //! Change the pointer value, or set if if the default constructor was used.
+    //! If a pointer had previously been associated with the object, and \a p is
+    //! different than that previous pointer, it will be deleted before taking
+    //! ownership of \a p. If this is not desired, call reset() beforehand.
+    void set(ptr_type p)
+    {
+        if (_p && p != _p)
+        {
+            safe_delete();
+        }
+        _p = p;
+    }
+
+    //! Dissociates any previously set pointer value without deleting it.
+    void reset() { _p = 0; }
+    //! Dissociates a previously set pointer value, deleting it at the same time.
+    void clear() { safe_delete(); }
+    //! Forces immediate deletion of the object. If you are planning on using
+    //! this method, think about just using a normal pointer. It probably makes
+    //! more sense.
+    virtual void safe_delete()
+    {
+        if (_p)
+        {
+            delete _p;
+            _p = 0;
+        }
+    }
+
+    //! \name Operators
+    //@{
+
+    //! Makes the object transparent as the template type.
+    operator ptr_type() { return _p; }
+    //! Const version of the pointer operator.
+    operator const_ptr_type() const { return _p; }
+    //! Makes the object transparent as a reference of the template type.
+    operator ref_type() { return *_p; }
+    //! Const version of the reference operator.
+    operator const_ref_type() const { return *_p; }
+    //! Returns a boolean indicating whether the object has a pointer set or not.
+    operator bool() const { return _p != 0; }
+    //! To allow setting the pointer directly. Equivalent to a call to set().
+    smart_ptr<T> &operator=(const_ptr_type p)
+    {
+        set(const_cast<ptr_type>(p));
+        return *this;
+    }
+
+    //! Another operator to allow you to treat the object just like a pointer.
+    ptr_type operator->() { return _p; }
+    //! Another operator to allow you to treat the object just like a pointer.
+    const_ptr_type operator->() const { return _p; }
+    //	//! Pointer dereferencing operator.
+    //	ref_type operator * () const { return *_p; }
+    //
+    //	//! Const version of the pointer dereference operator.
+    //	const_ref_type operator * () const { return *_p; }
+
+    //@}
+
+protected:
+    ptr_type _p; //!< The wrapped pointer.
+};
+
+/*!
+ * \brief Simple, standard smart pointer class that uses the array delete operator.
+ *
+ * This class only supports the single-owner paradigm.
+ *
+ * This is almost entirely a copy of smart_ptr since the final C++ specification
+ * does not allow template subclass members to access members  of the parent that
+ * do not depend on the template parameter.
+ */
+template <typename T>
+class smart_array_ptr
+{
+public:
+    typedef T data_type;
+    typedef T *ptr_type;
+    typedef const T *const_ptr_type;
+    typedef T &ref_type;
+    typedef const T &const_ref_type;
+
+    //! Default constuctor. Initialises with no pointer set.
+    smart_array_ptr()
+        : _p(0)
+    {
+    }
+
+    //! This constructor takes a pointer to the object to be deleted.
+    smart_array_ptr(ptr_type p)
+        : _p(p)
+    {
+    }
+
+    //! Destructor. If an array has been set, it will be deleted.
+    //! Deletes the array using safe_delete().
+    virtual ~smart_array_ptr() { safe_delete(); }
+    //! Return the current pointer value.
+    ptr_type get() { return _p; }
+    //! Return the const form of the current pointer value.
+    const_ptr_type get() const { return _p; }
+    //! Change the pointer value, or set if if the default constructor was used.
+    //! If a pointer had previously been associated with the object, and \a p is
+    //! different than that previous pointer, it will be deleted before taking
+    //! ownership of \a p. If this is not desired, call reset() beforehand.
+    void set(ptr_type p)
+    {
+        if (_p && p != _p)
+        {
+            safe_delete();
+        }
+        _p = p;
+    }
+
+    //! Dissociates any previously set pointer value without deleting it.
+    void reset() { _p = 0; }
+    //! Dissociates a previously set pointer value, deleting it at the same time.
+    void clear() { safe_delete(); }
+    //! Forces immediate deletion of the object. If you are planning on using
+    //! this method, think about just using a normal pointer. It probably makes
+    //! more sense.
+    virtual void safe_delete()
+    {
+        if (_p)
+        {
+            delete[] _p;
+            _p = 0;
+        }
+    }
+
+    //! \name Operators
+    //@{
+
+    //! Makes the object transparent as the template type.
+    operator ptr_type() { return _p; }
+    //! Const version of the pointer operator.
+    operator const_ptr_type() const { return _p; }
+    //! Makes the object transparent as a reference of the template type.
+    operator ref_type() { return *_p; }
+    //! Const version of the reference operator.
+    operator const_ref_type() const { return *_p; }
+    //! Returns a boolean indicating whether the object has a pointer set or not.
+    operator bool() const { return _p != 0; }
+    //! To allow setting the pointer directly. Equivalent to a call to set().
+    smart_array_ptr<T> &operator=(const_ptr_type p)
+    {
+        set(const_cast<ptr_type>(p));
+        return *this;
+    }
+
+    //! Another operator to allow you to treat the object just like a pointer.
+    ptr_type operator->() { return _p; }
+    //! Another operator to allow you to treat the object just like a pointer.
+    const_ptr_type operator->() const { return _p; }
+    //! Indexing operator.
+    ref_type operator[](unsigned index) { return _p[index]; }
+    //! Indexing operator.
+    const_ref_type operator[](unsigned index) const { return _p[index]; }
+    //	//! Pointer dereferencing operator.
+    //	ref_type operator * () const { return *_p; }
+    //
+    //	//! Const version of the pointer dereference operator.
+    //	const_ref_type operator * () const { return *_p; }
+
+    //@}
+
+protected:
+    ptr_type _p; //!< The wrapped pointer.
+};
+
+#endif // _smart_ptr_h_