65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
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// Common/DynamicBuffer.h
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#ifndef __COMMON_DYNAMIC_BUFFER_H
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#define __COMMON_DYNAMIC_BUFFER_H
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template <class T> class CDynamicBuffer
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{
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T *_items;
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size_t _size;
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size_t _pos;
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CDynamicBuffer(const CDynamicBuffer &buffer);
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void operator=(const CDynamicBuffer &buffer);
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void Grow(size_t size)
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{
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size_t delta = _size >= 64 ? _size : 64;
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if (delta < size)
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delta = size;
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size_t newCap = _size + delta;
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if (newCap < delta)
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{
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newCap = _size + size;
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if (newCap < size)
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throw 20120116;
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}
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T *newBuffer = new T[newCap];
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if (_pos != 0)
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memcpy(newBuffer, _items, _pos * sizeof(T));
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delete []_items;
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_items = newBuffer;
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_size = newCap;
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}
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public:
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CDynamicBuffer(): _items(0), _size(0), _pos(0) {}
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// operator T *() { return _items; }
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operator const T *() const { return _items; }
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~CDynamicBuffer() { delete []_items; }
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T *GetCurPtrAndGrow(size_t addSize)
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{
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size_t rem = _size - _pos;
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if (rem < addSize)
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Grow(addSize - rem);
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T *res = _items + _pos;
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_pos += addSize;
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return res;
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}
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void AddData(const T *data, size_t size)
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{
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memcpy(GetCurPtrAndGrow(size), data, size * sizeof(T));
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}
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const size_t GetPos() const { return _pos; }
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// void Empty() { _pos = 0; }
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};
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typedef CDynamicBuffer<unsigned char> CByteDynamicBuffer;
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#endif
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