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// Common/Buffer.h
#ifndef __COMMON_BUFFER_H
#define __COMMON_BUFFER_H
#include "Defs.h"
template <class T> class CBuffer
{
protected:
size_t _capacity;
T *_items;
public:
void Free()
{
delete []_items;
_items = 0;
_capacity = 0;
}
CBuffer(): _capacity(0), _items(0) {};
CBuffer(const CBuffer &buffer): _capacity(0), _items(0) { *this = buffer; }
CBuffer(size_t size): _items(0), _capacity(0) { SetCapacity(size); }
virtual ~CBuffer() { delete []_items; }
operator T *() { return _items; };
operator const T *() const { return _items; };
size_t GetCapacity() const { return _capacity; }
void SetCapacity(size_t newCapacity)
{
if (newCapacity == _capacity)
return;
T *newBuffer;
if (newCapacity > 0)
{
newBuffer = new T[newCapacity];
if(_capacity > 0)
memmove(newBuffer, _items, MyMin(_capacity, newCapacity) * sizeof(T));
}
else
newBuffer = 0;
delete []_items;
_items = newBuffer;
_capacity = newCapacity;
}
CBuffer& operator=(const CBuffer &buffer)
{
Free();
if(buffer._capacity > 0)
{
SetCapacity(buffer._capacity);
memmove(_items, buffer._items, buffer._capacity * sizeof(T));
}
return *this;
}
};
template <class T>
bool operator==(const CBuffer<T>& b1, const CBuffer<T>& b2)
{
if (b1.GetCapacity() != b2.GetCapacity())
return false;
for (size_t i = 0; i < b1.GetCapacity(); i++)
if (b1[i] != b2[i])
return false;
return true;
}
template <class T>
bool operator!=(const CBuffer<T>& b1, const CBuffer<T>& b2)
{
return !(b1 == b2);
}
typedef CBuffer<char> CCharBuffer;
typedef CBuffer<wchar_t> CWCharBuffer;
typedef CBuffer<unsigned char> CByteBuffer;
#endif