Mercurial > vba-linux
annotate src/win32/7zip/7z/CPP/Common/DynamicBuffer.h @ 1:f9f4f1b99eed
importing src directory
| author | Robert McIntyre <rlm@mit.edu> |
|---|---|
| date | Sat, 03 Mar 2012 10:31:27 -0600 |
| parents | |
| children |
| rev | line source |
|---|---|
| rlm@1 | 1 // Common/DynamicBuffer.h |
| rlm@1 | 2 |
| rlm@1 | 3 #ifndef __COMMON_DYNAMICBUFFER_H |
| rlm@1 | 4 #define __COMMON_DYNAMICBUFFER_H |
| rlm@1 | 5 |
| rlm@1 | 6 #include "Buffer.h" |
| rlm@1 | 7 |
| rlm@1 | 8 template <class T> class CDynamicBuffer: public CBuffer<T> |
| rlm@1 | 9 { |
| rlm@1 | 10 void GrowLength(size_t size) |
| rlm@1 | 11 { |
| rlm@1 | 12 size_t delta; |
| rlm@1 | 13 if (this->_capacity > 64) |
| rlm@1 | 14 delta = this->_capacity / 4; |
| rlm@1 | 15 else if (this->_capacity > 8) |
| rlm@1 | 16 delta = 16; |
| rlm@1 | 17 else |
| rlm@1 | 18 delta = 4; |
| rlm@1 | 19 delta = MyMax(delta, size); |
| rlm@1 | 20 SetCapacity(this->_capacity + delta); |
| rlm@1 | 21 } |
| rlm@1 | 22 public: |
| rlm@1 | 23 CDynamicBuffer(): CBuffer<T>() {}; |
| rlm@1 | 24 CDynamicBuffer(const CDynamicBuffer &buffer): CBuffer<T>(buffer) {}; |
| rlm@1 | 25 CDynamicBuffer(size_t size): CBuffer<T>(size) {}; |
| rlm@1 | 26 CDynamicBuffer& operator=(const CDynamicBuffer &buffer) |
| rlm@1 | 27 { |
| rlm@1 | 28 this->Free(); |
| rlm@1 | 29 if (buffer._capacity > 0) |
| rlm@1 | 30 { |
| rlm@1 | 31 SetCapacity(buffer._capacity); |
| rlm@1 | 32 memmove(this->_items, buffer._items, buffer._capacity * sizeof(T)); |
| rlm@1 | 33 } |
| rlm@1 | 34 return *this; |
| rlm@1 | 35 } |
| rlm@1 | 36 void EnsureCapacity(size_t capacity) |
| rlm@1 | 37 { |
| rlm@1 | 38 if (this->_capacity < capacity) |
| rlm@1 | 39 GrowLength(capacity - this->_capacity); |
| rlm@1 | 40 } |
| rlm@1 | 41 }; |
| rlm@1 | 42 |
| rlm@1 | 43 typedef CDynamicBuffer<char> CCharDynamicBuffer; |
| rlm@1 | 44 typedef CDynamicBuffer<wchar_t> CWCharDynamicBuffer; |
| rlm@1 | 45 typedef CDynamicBuffer<unsigned char> CByteDynamicBuffer; |
| rlm@1 | 46 |
| rlm@1 | 47 #endif |