initial commit

Library/PackageCache/com.unity.scriptablebuildpipeline@1.21.5/Editor/Utilities/HashStream.cs

@@ -0,0 +1,44 @@
+using System.IO;
+using System.Security.Cryptography;
+
+namespace UnityEditor.Build.Pipeline.Utilities
+{
+    internal class HashStream : Stream
+    {
+        HashAlgorithm m_Algorithm;
+
+        public HashStream(HashAlgorithm algorithm)
+        {
+            m_Algorithm = algorithm;
+        }
+
+        public RawHash GetHash()
+        {
+            m_Algorithm.TransformFinalBlock(System.Array.Empty<byte>(), 0, 0);
+            return new RawHash(m_Algorithm.Hash);
+        }
+
+        public override bool CanRead => false;
+
+        public override bool CanSeek => false;
+
+        public override bool CanWrite => true;
+
+        public override long Length => Null.Length;
+
+        public override long Position { get => Null.Position; set => Null.Position = value; }
+
+        public override void Flush() {}
+
+        public override int Read(byte[] buffer, int offset, int count) => Null.Read(buffer, offset, count);
+
+        public override long Seek(long offset, SeekOrigin origin) => Null.Seek(offset, origin);
+
+        public override void SetLength(long value) => Null.SetLength(value);
+
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            m_Algorithm.TransformBlock(buffer, offset, count, null, 0);
+        }
+    }
+}