Upload 2.0.2

[physicsfs] / lzma / CPP / Common / Buffer.h

diff --git a/lzma/CPP/Common/Buffer.h b/lzma/CPP/Common/Buffer.h
new file mode 100644 (file)
index 0000000..78a68a6
--- /dev/null
+++ b/lzma/CPP/Common/Buffer.h
@@ -0,0 +1,77 @@
+// Common/Buffer.h
+
+#ifndef __COMMON_BUFFER_H
+#define __COMMON_BUFFER_H
+
+#include "Defs.h"
+
+template <class T> class CBuffer
+{    
+protected:
+  size_t _capacity;
+  T *_items;
+public:
+  void Free()
+  {
+    delete []_items;
+    _items = 0;
+    _capacity = 0;
+  }
+  CBuffer(): _capacity(0), _items(0) {};
+  CBuffer(const CBuffer &buffer): _capacity(0), _items(0) { *this = buffer; }
+  CBuffer(size_t size): _items(0),  _capacity(0) {  SetCapacity(size); }
+  virtual ~CBuffer() { delete []_items; }
+  operator T *() { return _items; };
+  operator const T *() const { return _items; };
+  size_t GetCapacity() const { return  _capacity; }
+  void SetCapacity(size_t newCapacity)
+  {
+    if (newCapacity == _capacity)
+      return;
+    T *newBuffer;
+    if (newCapacity > 0)
+    {
+      newBuffer = new T[newCapacity];
+      if(_capacity > 0)
+        memmove(newBuffer, _items, MyMin(_capacity, newCapacity) * sizeof(T));
+    }
+    else
+      newBuffer = 0;
+    delete []_items;
+    _items = newBuffer;
+    _capacity = newCapacity;
+  }
+  CBuffer& operator=(const CBuffer &buffer)
+  {
+    Free();
+    if(buffer._capacity > 0)
+    {
+      SetCapacity(buffer._capacity);
+      memmove(_items, buffer._items, buffer._capacity * sizeof(T));
+    }
+    return *this;
+  }
+};
+
+template <class T>
+bool operator==(const CBuffer<T>& b1, const CBuffer<T>& b2)
+{
+  if (b1.GetCapacity() != b2.GetCapacity())
+    return false;
+  for (size_t i = 0; i < b1.GetCapacity(); i++)
+    if (b1[i] != b2[i])
+      return false;
+  return true;
+}
+
+template <class T>
+bool operator!=(const CBuffer<T>& b1, const CBuffer<T>& b2)
+{
+  return !(b1 == b2);
+}
+
+typedef CBuffer<char> CCharBuffer;
+typedef CBuffer<wchar_t> CWCharBuffer;
+typedef CBuffer<unsigned char> CByteBuffer;
+
+#endif