Mercurial > vba-clojure

comparison src/win32/7zip/7z/CPP/Common/Buffer.h @ 1:f9f4f1b99eed

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
importing src directory
author Robert McIntyre <rlm@mit.edu>
date Sat, 03 Mar 2012 10:31:27 -0600
parents
children
comparison
equal deleted inserted replaced
0:8ced16adf2e1 1:f9f4f1b99eed
1 // Common/Buffer.h
2
3 #ifndef __COMMON_BUFFER_H
4 #define __COMMON_BUFFER_H
5
6 #include "Defs.h"
7
8 template <class T> class CBuffer
9 {
10 protected:
11 size_t _capacity;
12 T *_items;
13 public:
14 void Free()
15 {
16 delete []_items;
17 _items = 0;
18 _capacity = 0;
19 }
20 CBuffer(): _capacity(0), _items(0) {};
21 CBuffer(const CBuffer &buffer): _capacity(0), _items(0) { *this = buffer; }
22 CBuffer(size_t size): _items(0), _capacity(0) { SetCapacity(size); }
23 virtual ~CBuffer() { delete []_items; }
24 operator T *() { return _items; };
25 operator const T *() const { return _items; };
26 size_t GetCapacity() const { return _capacity; }
27 void SetCapacity(size_t newCapacity)
28 {
29 if (newCapacity == _capacity)
30 return;
31 T *newBuffer;
32 if (newCapacity > 0)
33 {
34 newBuffer = new T[newCapacity];
35 if (_capacity > 0)
36 memmove(newBuffer, _items, MyMin(_capacity, newCapacity) * sizeof(T));
37 }
38 else
39 newBuffer = 0;
40 delete []_items;
41 _items = newBuffer;
42 _capacity = newCapacity;
43 }
44 CBuffer& operator=(const CBuffer &buffer)
45 {
46 Free();
47 if (buffer._capacity > 0)
48 {
49 SetCapacity(buffer._capacity);
50 memmove(_items, buffer._items, buffer._capacity * sizeof(T));
51 }
52 return *this;
53 }
54 };
55
56 template <class T>
57 bool operator==(const CBuffer<T>& b1, const CBuffer<T>& b2)
58 {
59 if (b1.GetCapacity() != b2.GetCapacity())
60 return false;
61 for (size_t i = 0; i < b1.GetCapacity(); i++)
62 if (b1[i] != b2[i])
63 return false;
64 return true;
65 }
66
67 template <class T>
68 bool operator!=(const CBuffer<T>& b1, const CBuffer<T>& b2)
69 {
70 return !(b1 == b2);
71 }
72
73 typedef CBuffer<char> CCharBuffer;
74 typedef CBuffer<wchar_t> CWCharBuffer;
75 typedef CBuffer<unsigned char> CByteBuffer;
76
77 #endif