rlm@1: // Common/Buffer.h
rlm@1: 
rlm@1: #ifndef __COMMON_BUFFER_H
rlm@1: #define __COMMON_BUFFER_H
rlm@1: 
rlm@1: #include "Defs.h"
rlm@1: 
rlm@1: template <class T> class CBuffer
rlm@1: {
rlm@1: protected:
rlm@1:   size_t _capacity;
rlm@1:   T *_items;
rlm@1: public:
rlm@1:   void Free()
rlm@1:   {
rlm@1:     delete []_items;
rlm@1:     _items = 0;
rlm@1:     _capacity = 0;
rlm@1:   }
rlm@1:   CBuffer(): _capacity(0), _items(0) {};
rlm@1:   CBuffer(const CBuffer &buffer): _capacity(0), _items(0) { *this = buffer; }
rlm@1:   CBuffer(size_t size): _items(0),  _capacity(0) {  SetCapacity(size); }
rlm@1:   virtual ~CBuffer() { delete []_items; }
rlm@1:   operator T *() { return _items; };
rlm@1:   operator const T *() const { return _items; };
rlm@1:   size_t GetCapacity() const { return  _capacity; }
rlm@1:   void SetCapacity(size_t newCapacity)
rlm@1:   {
rlm@1:     if (newCapacity == _capacity)
rlm@1:       return;
rlm@1:     T *newBuffer;
rlm@1:     if (newCapacity > 0)
rlm@1:     {
rlm@1:       newBuffer = new T[newCapacity];
rlm@1:       if (_capacity > 0)
rlm@1:         memmove(newBuffer, _items, MyMin(_capacity, newCapacity) * sizeof(T));
rlm@1:     }
rlm@1:     else
rlm@1:       newBuffer = 0;
rlm@1:     delete []_items;
rlm@1:     _items = newBuffer;
rlm@1:     _capacity = newCapacity;
rlm@1:   }
rlm@1:   CBuffer& operator=(const CBuffer &buffer)
rlm@1:   {
rlm@1:     Free();
rlm@1:     if (buffer._capacity > 0)
rlm@1:     {
rlm@1:       SetCapacity(buffer._capacity);
rlm@1:       memmove(_items, buffer._items, buffer._capacity * sizeof(T));
rlm@1:     }
rlm@1:     return *this;
rlm@1:   }
rlm@1: };
rlm@1: 
rlm@1: template <class T>
rlm@1: bool operator==(const CBuffer<T>& b1, const CBuffer<T>& b2)
rlm@1: {
rlm@1:   if (b1.GetCapacity() != b2.GetCapacity())
rlm@1:     return false;
rlm@1:   for (size_t i = 0; i < b1.GetCapacity(); i++)
rlm@1:     if (b1[i] != b2[i])
rlm@1:       return false;
rlm@1:   return true;
rlm@1: }
rlm@1: 
rlm@1: template <class T>
rlm@1: bool operator!=(const CBuffer<T>& b1, const CBuffer<T>& b2)
rlm@1: {
rlm@1:   return !(b1 == b2);
rlm@1: }
rlm@1: 
rlm@1: typedef CBuffer<char> CCharBuffer;
rlm@1: typedef CBuffer<wchar_t> CWCharBuffer;
rlm@1: typedef CBuffer<unsigned char> CByteBuffer;
rlm@1: 
rlm@1: #endif