Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

external/linker/cecil/Mono.Cecil/EmbeddedResource.cs

@@ -0,0 +1,98 @@
+//
+// Author:
+//   Jb Evain (jbevain@gmail.com)
+//
+// Copyright (c) 2008 - 2015 Jb Evain
+// Copyright (c) 2008 - 2011 Novell, Inc.
+//
+// Licensed under the MIT/X11 license.
+//
+
+using System;
+using System.IO;
+
+namespace Mono.Cecil {
+
+	public sealed class EmbeddedResource : Resource {
+
+		readonly MetadataReader reader;
+
+		uint? offset;
+		byte [] data;
+		Stream stream;
+
+		public override ResourceType ResourceType {
+			get { return ResourceType.Embedded; }
+		}
+
+		public EmbeddedResource (string name, ManifestResourceAttributes attributes, byte [] data) :
+			base (name, attributes)
+		{
+			this.data = data;
+		}
+
+		public EmbeddedResource (string name, ManifestResourceAttributes attributes, Stream stream) :
+			base (name, attributes)
+		{
+			this.stream = stream;
+		}
+
+		internal EmbeddedResource (string name, ManifestResourceAttributes attributes, uint offset, MetadataReader reader)
+			: base (name, attributes)
+		{
+			this.offset = offset;
+			this.reader = reader;
+		}
+
+		public Stream GetResourceStream ()
+		{
+			if (stream != null)
+				return stream;
+
+			if (data != null)
+				return new MemoryStream (data);
+
+			if (offset.HasValue)
+				return new MemoryStream (reader.GetManagedResource (offset.Value));
+
+			throw new InvalidOperationException ();
+		}
+
+		public byte [] GetResourceData ()
+		{
+			if (stream != null)
+				return ReadStream (stream);
+
+			if (data != null)
+				return data;
+
+			if (offset.HasValue)
+				return reader.GetManagedResource (offset.Value);
+
+			throw new InvalidOperationException ();
+		}
+
+		static byte [] ReadStream (Stream stream)
+		{
+			int read;
+
+			if (stream.CanSeek) {
+				var length = (int) stream.Length;
+				var data = new byte [length];
+				int offset = 0;
+
+				while ((read = stream.Read (data, offset, length - offset)) > 0)
+					offset += read;
+
+				return data;
+			}
+
+			var buffer = new byte [1024 * 8];
+			var memory = new MemoryStream ();
+			while ((read = stream.Read (buffer, 0, buffer.Length)) > 0)
+				memory.Write (buffer, 0, read);
+
+			return memory.ToArray ();
+		}
+	}
+}