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