separate code into library

misc

AssetStudio/Extensions/BinaryWriterExtensions.cs

@@ -0,0 +1,40 @@
+using System;
+using System.IO;
+using System.Text;
+
+namespace AssetStudio
+{
+    public static class BinaryWriterExtensions
+    {
+        private static void WriteArray<T>(Action<T> del, T[] array)
+        {
+            foreach (var item in array)
+            {
+                del(item);
+            }
+        }
+
+        public static void Write(this BinaryWriter writer, uint[] array)
+        {
+            WriteArray(writer.Write, array);
+        }
+
+        public static void AlignStream(this BinaryWriter writer, int alignment)
+        {
+            var pos = writer.BaseStream.Position;
+            var mod = pos % alignment;
+            if (mod != 0)
+            {
+                writer.Write(new byte[alignment - mod]);
+            }
+        }
+
+        public static void WriteAlignedString(this BinaryWriter writer, string str)
+        {
+            var bytes = Encoding.UTF8.GetBytes(str);
+            writer.Write(bytes.Length);
+            writer.Write(bytes);
+            writer.AlignStream(4);
+        }
+    }
+}