v0.80.30

AssetStudio/Extensions/ByteArrayExtensions.cs

@@ -0,0 +1,38 @@
+using System.Text;
+
+namespace AssetStudio
+{
+    public static class ByteArrayExtensions
+    {
+        public static bool IsNullOrEmpty<T>(this T[] array) => array == null || array.Length == 0;
+        public static byte[] ToUInt4Array(this byte[] source) => ToUInt4Array(source, 0, source.Length);
+        public static byte[] ToUInt4Array(this byte[] source, int offset, int size)
+        {
+            var buffer = new byte[size * 2];
+            for (var i = 0; i < size; i++)
+            {
+                var idx = i * 2;
+                buffer[idx] = (byte)(source[offset + i] >> 4);
+                buffer[idx + 1] = (byte)(source[offset + i] & 0xF);
+            }
+            return buffer;
+        }
+        public static int Search(this byte[] src, string value, int offset = 0) => Search(src, Encoding.UTF8.GetBytes(value), offset);
+        public static int Search(this byte[] src, byte[] pattern, int offset)
+        {
+            int maxFirstCharSlot = src.Length - pattern.Length + 1;
+            for (int i = offset; i < maxFirstCharSlot; i++)
+            {
+                if (src[i] != pattern[0])
+                    continue;
+
+                for (int j = pattern.Length - 1; j >= 1; j--)
+                {
+                    if (src[i + j] != pattern[j]) break;
+                    if (j == 1) return i;
+                }
+            }
+            return -1;
+        }
+    }
+}