move code into correct directory structure

src/UglyToad.Pdf/IO/ByteArrayInputBytes.cs

@@ -0,0 +1,41 @@
+namespace UglyToad.Pdf.IO
+{
+    using System.Collections.Generic;
+
+    public class ByteArrayInputBytes : IInputBytes
+    {
+        private readonly IReadOnlyList<byte> bytes;
+
+        public ByteArrayInputBytes(IReadOnlyList<byte> bytes)
+        {
+            this.bytes = bytes;
+            CurrentOffset = -1;
+        }
+
+        public int CurrentOffset { get; private set; }
+
+        public bool MoveNext()
+        {
+            if (CurrentOffset == bytes.Count - 1)
+            {
+                return false;
+            }
+
+            CurrentOffset++;
+            CurrentByte = bytes[CurrentOffset];
+            return true;
+        }
+
+        public byte CurrentByte { get; private set; }
+
+        public byte? Peek()
+        {
+            if (CurrentOffset == bytes.Count - 1)
+            {
+                return null;
+            }
+
+            return bytes[CurrentOffset + 1];
+        }
+    }
+}