Initial commit

LibDgf/Utils.cs

@@ -0,0 +1,29 @@
+using LibDgf.Aqualead;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+
+namespace LibDgf
+{
+    public static class Utils
+    {
+        public static Stream CheckDecompress(Stream stream, bool keepOpen = false)
+        {
+            BinaryReader br = new BinaryReader(stream);
+            if (new string(br.ReadChars(4)) == "ALLZ")
+            {
+                stream.Seek(-4, SeekOrigin.Current);
+                var decoder = new AlLzDecoder();
+                byte[] decoded = decoder.Decode(stream);
+                if (!keepOpen) stream.Close();
+                stream = new MemoryStream(decoded);
+            }
+            else
+            {
+                stream.Seek(-4, SeekOrigin.Current);
+            }
+            return stream;
+        }
+    }
+}