renamed wx/ptr_shrd.h to wx/sharedptr.h; split wx/ptr_scpd.h in wx/scopedptr.h and wx/scopedarray.h; extracted common parts into new wx/checkeddelete.h

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58634 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/scopedarray.h

@@ -0,0 +1,120 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/scopedarray.h
+// Purpose:     scoped smart pointer class
+// Author:      Vadim Zeitlin
+// Created:     2009-02-03
+// RCS-ID:      $Id$
+// Copyright:   (c) Jesse Lovelace and original Boost authors (see below)
+//              (c) 2009 Vadim Zeitlin
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_SCOPED_ARRAY_H_
+#define _WX_SCOPED_ARRAY_H_
+
+#include "wx/defs.h"
+#include "wx/checkeddelete.h"
+
+// ----------------------------------------------------------------------------
+// wxScopedArray: A scoped array
+// ----------------------------------------------------------------------------
+
+template <class T>
+class wxScopedArray
+{
+public:
+    typedef T element_type;
+
+    wxEXPLICIT wxScopedArray(T * array = NULL) : m_array(array) { }
+
+    ~wxScopedArray() { delete [] m_array; }
+
+    // test for pointer validity: defining conversion to unspecified_bool_type
+    // and not more obvious bool to avoid implicit conversions to integer types
+    typedef T *(wxScopedArray<T>::*unspecified_bool_type)() const;
+    operator unspecified_bool_type() const
+    {
+        return m_array ? &wxScopedArray<T>::get : NULL;
+    }
+
+    void reset(T *array = NULL)
+    {
+        if ( array != m_array )
+        {
+            delete m_array;
+            m_array = array;
+        }
+    }
+
+    T& operator[](size_t n) const { return m_array[n]; }
+
+    T *get() const { return m_array; }
+
+    void swap(wxScopedArray &other)
+    {
+        T * const tmp = other.m_array;
+        other.m_array = m_array;
+        m_array = tmp;
+    }
+
+private:
+    T *m_array;
+
+    DECLARE_NO_COPY_TEMPLATE_CLASS(wxScopedArray, T)
+};
+
+// ----------------------------------------------------------------------------
+// old macro based implementation
+// ----------------------------------------------------------------------------
+
+// the same but for arrays instead of simple pointers
+#define wxDECLARE_SCOPED_ARRAY(T, name)\
+class name                          \
+{                                   \
+private:                            \
+    T * m_ptr;                      \
+    name(name const &);             \
+    name & operator=(name const &); \
+                                    \
+public:                             \
+    wxEXPLICIT name(T * p = NULL) : m_ptr(p) \
+    {}                              \
+                                    \
+    ~name();                        \
+    void reset(T * p = NULL);       \
+                                    \
+    T & operator[](long int i) const\
+    {                               \
+        wxASSERT(m_ptr != NULL);    \
+        wxASSERT(i >= 0);           \
+        return m_ptr[i];            \
+    }                               \
+                                    \
+    T * get() const                 \
+    {                               \
+        return m_ptr;               \
+    }                               \
+                                    \
+    void swap(name & ot)            \
+    {                               \
+        T * tmp = ot.m_ptr;         \
+        ot.m_ptr = m_ptr;           \
+        m_ptr = tmp;                \
+    }                               \
+};
+
+#define wxDEFINE_SCOPED_ARRAY(T, name)  \
+name::~name()                           \
+{                                       \
+    wxCHECKED_DELETE_ARRAY(m_ptr);      \
+}                                       \
+void name::reset(T * p){                \
+    if (m_ptr != p)                     \
+    {                                   \
+       wxCHECKED_DELETE_ARRAY(m_ptr);   \
+       m_ptr = p;                       \
+    }                                   \
+}
+
+#endif // _WX_SCOPED_ARRAY_H_
+