move + protect ByteExtensions and throw if pos out of range

Author: nilsauf

…MS.NET.Contracts/Utils/ByteExtensions.cs FTMS.NET/Utils/ByteExtensions.csFTMS.NET.Contracts/Utils/ByteExtensions.cs renamed to FTMS.NET/Utils/ByteExtensions.cs FTMS.NET.Contracts/Utils/ByteExtensions.cs renamed to FTMS.NET/Utils/ByteExtensions.cs

@@ -1,29 +1,37 @@
 namespace FTMS.NET.Utils;
 
-public static class ByteExtensions
+internal static class ByteExtensions
 {
 	public static bool IsBitSet(this byte[] data, int pos)
 	{
+		if (pos < 0)
+			throw new IndexOutOfRangeException();
+
 		int byteIndex = pos / 7;
 		int bitIndex = pos % 7;
 
 		if (byteIndex >= data.Length)
-			return false;
+			throw new IndexOutOfRangeException();
 
 		return data[byteIndex].IsBitSet(bitIndex);
 	}
 
 	public static bool IsBitSet(this ReadOnlySpan<byte> data, int pos)
 	{
+		if (pos < 0)
+			throw new IndexOutOfRangeException();
+
 		int byteIndex = pos / 7;
 		int bitIndex = pos % 7;
 
 		if (byteIndex >= data.Length)
-			return false;
+			throw new IndexOutOfRangeException();
 
 		return data[byteIndex].IsBitSet(bitIndex);
 	}
 
 	public static bool IsBitSet(this byte b, int pos)
-		=> (b & 1 << pos) != 0;
+		=> pos < 0 || pos > 7 ? 
+			throw new IndexOutOfRangeException() : 
+			(b & 1 << pos) != 0;
 }