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1 // Common/DynamicBuffer.h
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2
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3 #ifndef __COMMON_DYNAMICBUFFER_H
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4 #define __COMMON_DYNAMICBUFFER_H
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5
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6 #include "Buffer.h"
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7
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8 template <class T> class CDynamicBuffer: public CBuffer<T>
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9 {
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10 void GrowLength(size_t size)
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11 {
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12 size_t delta;
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13 if (this->_capacity > 64)
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14 delta = this->_capacity / 4;
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15 else if (this->_capacity > 8)
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16 delta = 16;
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17 else
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18 delta = 4;
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19 delta = MyMax(delta, size);
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20 SetCapacity(this->_capacity + delta);
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21 }
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22 public:
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23 CDynamicBuffer(): CBuffer<T>() {};
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24 CDynamicBuffer(const CDynamicBuffer &buffer): CBuffer<T>(buffer) {};
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25 CDynamicBuffer(size_t size): CBuffer<T>(size) {};
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26 CDynamicBuffer& operator=(const CDynamicBuffer &buffer)
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27 {
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28 this->Free();
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29 if (buffer._capacity > 0)
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30 {
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31 SetCapacity(buffer._capacity);
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32 memmove(this->_items, buffer._items, buffer._capacity * sizeof(T));
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33 }
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34 return *this;
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35 }
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36 void EnsureCapacity(size_t capacity)
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37 {
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38 if (this->_capacity < capacity)
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39 GrowLength(capacity - this->_capacity);
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40 }
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41 };
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42
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43 typedef CDynamicBuffer<char> CCharDynamicBuffer;
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44 typedef CDynamicBuffer<wchar_t> CWCharDynamicBuffer;
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45 typedef CDynamicBuffer<unsigned char> CByteDynamicBuffer;
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46
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47 #endif
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