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