- Even more TArray changes.

(patches by Graf)

src/tarray.h

@@ -560,6 +560,10 @@ public:
 	{
 		return Array[index];
 	}
+	T &At(size_t index) const
+	{
+		return Array[index];
+	}
 	unsigned int Size() const
 	{
 		return Count;
@@ -1221,3 +1225,73 @@ protected:
 	hash_t Position;
 };
 
+
+class BitArray
+{
+	TArray<uint8_t> bytes;
+	unsigned size;
+
+public:
+	void Resize(unsigned elem)
+	{
+		bytes.Resize((elem + 7) / 8);
+		size = elem;
+	}
+
+	BitArray() : size(0)
+	{
+	}
+
+	BitArray(const BitArray & arr)
+	{
+		bytes = arr.bytes;
+		size = arr.size;
+	}
+
+	BitArray &operator=(const BitArray & arr)
+	{
+		bytes = arr.bytes;
+		size = arr.size;
+		return *this;
+	}
+
+	BitArray(BitArray && arr)
+	{
+		bytes = std::move(arr.bytes);
+		size = arr.size;
+		arr.size = 0;
+	}
+
+	BitArray &operator=(BitArray && arr)
+	{
+		bytes = std::move(arr.bytes);
+		size = arr.size;
+		arr.size = 0;
+		return *this;
+	}
+
+	bool operator[](size_t index) const
+	{
+		return !!(bytes[index >> 3] & (1 << (index & 7)));
+	}
+
+	void Set(size_t index)
+	{
+		bytes[index >> 3] |= (1 << (index & 7));
+	}
+
+	void Clear(size_t index)
+	{
+		bytes[index >> 3] &= ~(1 << (index & 7));
+	}
+
+	unsigned Size() const
+	{
+		return size;
+	}
+
+	void Zero()
+	{
+		memset(&bytes[0], 0, bytes.Size());
+	}
+};