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-rwxr-xr-xCPP/Common/Buffer.h77
1 files changed, 77 insertions, 0 deletions
diff --git a/CPP/Common/Buffer.h b/CPP/Common/Buffer.h
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+++ b/CPP/Common/Buffer.h
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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