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/////////////////////////////////////////////////////////////////////////////
// Name: wx/scopedarray.h
// Purpose: scoped smart pointer class
// Author: Vadim Zeitlin
// Created: 2009-02-03
// 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_
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