Mercurial > vba-linux

     1 // Common/DynamicBuffer.h

     2 

     3 #ifndef __COMMON_DYNAMICBUFFER_H

     4 #define __COMMON_DYNAMICBUFFER_H

     5 

     6 #include "Buffer.h"

     7 

     8 template <class T> class CDynamicBuffer: public CBuffer<T>

     9 {

    10   void GrowLength(size_t size)

    11   {

    12     size_t delta;

    13     if (this->_capacity > 64)

    14       delta = this->_capacity / 4;

    15     else if (this->_capacity > 8)

    16       delta = 16;

    17     else

    18       delta = 4;

    19     delta = MyMax(delta, size);

    20     SetCapacity(this->_capacity + delta);

    21   }

    22 public:

    23   CDynamicBuffer(): CBuffer<T>() {};

    24   CDynamicBuffer(const CDynamicBuffer &buffer): CBuffer<T>(buffer) {};

    25   CDynamicBuffer(size_t size): CBuffer<T>(size) {};

    26   CDynamicBuffer& operator=(const CDynamicBuffer &buffer)

    27   {

    28     this->Free();

    29     if (buffer._capacity > 0)

    30     {

    31       SetCapacity(buffer._capacity);

    32       memmove(this->_items, buffer._items, buffer._capacity * sizeof(T));

    33     }

    34     return *this;

    35   }

    36   void EnsureCapacity(size_t capacity)

    37   {

    38     if (this->_capacity < capacity)

    39       GrowLength(capacity - this->_capacity);

    40   }

    41 };

    42 

    43 typedef CDynamicBuffer<char> CCharDynamicBuffer;

    44 typedef CDynamicBuffer<wchar_t> CWCharDynamicBuffer;

    45 typedef CDynamicBuffer<unsigned char> CByteDynamicBuffer;

    46 

    47 #endif
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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