Initial checkin

BeefySysLib/Span.h

@@ -0,0 +1,130 @@
+#pragma once
+
+#include "../Common.h"
+
+NS_BF_BEGIN
+
+template <typename T>
+class Span
+{
+public:
+	T* mVals;
+	int mSize;
+
+public:
+	struct Iterator
+	{
+	public:
+		T* mPtr;
+
+	public:
+		Iterator(T* ptr)
+		{
+			mPtr = ptr;
+		}
+
+		Iterator& operator++()
+		{
+			mPtr++;
+			return *this;
+		}
+
+		bool operator!=(const Iterator& itr) const
+		{
+			return itr.mPtr != mPtr;
+		}
+
+		bool operator==(const Iterator& itr) const
+		{
+			return itr.mPtr == mPtr;
+		}
+
+		T& operator*()
+		{
+			return *mPtr;
+		}
+	};
+
+	Span()
+	{
+
+	}
+
+	Span(T* mPtr, int size)
+	{
+		mSize = (int)refVec.size();		
+		mVals = NULL;
+	}
+	
+	T& operator[](int idx) const
+	{
+		return mVals[idx];
+	}
+
+	Iterator begin() const
+	{
+		return mVals;
+	}
+
+	Iterator end() const
+	{
+		return mVals + mSize;
+	}
+
+	T back() const
+	{
+		return mVals[mSize - 1];
+	}
+
+	int size() const
+	{
+		return mSize;
+	}
+
+	bool empty() const
+	{
+		return mSize == 0;
+	}
+
+	bool IsEmpty() const
+	{
+		return mSize == 0;
+	}
+
+	T Get(int idx)
+	{
+		if ((idx < 0) || (idx >= mSize))
+			return (T)0;
+		return mVals[idx];
+	}
+
+	template <typename T2>
+	T2 GetAs(int idx)
+	{
+		if ((idx < 0) || (idx >= mSize))
+			return (T2)0;
+		return (T2)mVals[idx];
+	}
+
+	T GetLast()
+	{
+		if (mSize == 0)
+			return (T)0;
+		return mVals[mSize - 1];
+	}
+
+	T GetFirst()
+	{
+		if (mSize == 0)
+			return (T)0;
+		return mVals[0];
+	}
+
+	void SetSize(int size)
+	{
+		BF_ASSERT(size <= mSize);
+		mSize = size;
+	}
+};
+
+NS_BF_END