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-rwxr-xr-xCPP/Common/DynamicBuffer.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/CPP/Common/DynamicBuffer.h b/CPP/Common/DynamicBuffer.h
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--- /dev/null
+++ b/CPP/Common/DynamicBuffer.h
@@ -0,0 +1,50 @@
+// Common/DynamicBuffer.h
+
+#ifndef __COMMON_DYNAMIC_BUFFER_H
+#define __COMMON_DYNAMIC_BUFFER_H
+
+#include "Buffer.h"
+
+template <class T> class CDynamicBuffer: public CBuffer<T>
+{
+ void GrowLength(size_t size)
+ {
+ size_t delta;
+ if (this->_capacity > 64)
+ delta = this->_capacity / 4;
+ else if (this->_capacity > 8)
+ delta = 16;
+ else
+ delta = 4;
+ delta = MyMax(delta, size);
+ size_t newCap = this->_capacity + delta;
+ if (newCap < delta)
+ newCap = this->_capacity + size;
+ SetCapacity(newCap);
+ }
+public:
+ CDynamicBuffer(): CBuffer<T>() {};
+ CDynamicBuffer(const CDynamicBuffer &buffer): CBuffer<T>(buffer) {};
+ CDynamicBuffer(size_t size): CBuffer<T>(size) {};
+ CDynamicBuffer& operator=(const CDynamicBuffer &buffer)
+ {
+ this->Free();
+ if (buffer._capacity > 0)
+ {
+ SetCapacity(buffer._capacity);
+ memmove(this->_items, buffer._items, buffer._capacity * sizeof(T));
+ }
+ return *this;
+ }
+ void EnsureCapacity(size_t capacity)
+ {
+ if (this->_capacity < capacity)
+ GrowLength(capacity - this->_capacity);
+ }
+};
+
+typedef CDynamicBuffer<char> CCharDynamicBuffer;
+typedef CDynamicBuffer<wchar_t> CWCharDynamicBuffer;
+typedef CDynamicBuffer<unsigned char> CByteDynamicBuffer;
+
+#endif