Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

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

@@ -0,0 +1,274 @@
+//
+// 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.Globalization;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Mono.Cecil {
+
+	public class AssemblyNameReference : IMetadataScope {
+
+		string name;
+		string culture;
+		Version version;
+		uint attributes;
+		byte [] public_key;
+		byte [] public_key_token;
+		AssemblyHashAlgorithm hash_algorithm;
+		byte [] hash;
+
+		internal MetadataToken token;
+
+		string full_name;
+
+		public string Name {
+			get { return name; }
+			set {
+				name = value;
+				full_name = null;
+			}
+		}
+
+		public string Culture {
+			get { return culture; }
+			set {
+				culture = value;
+				full_name = null;
+			}
+		}
+
+		public Version Version {
+			get { return version; }
+			set {
+				version = Mixin.CheckVersion (value);
+				full_name = null;
+			}
+		}
+
+		public AssemblyAttributes Attributes {
+			get { return (AssemblyAttributes) attributes; }
+			set { attributes = (uint) value; }
+		}
+
+		public bool HasPublicKey {
+			get { return attributes.GetAttributes ((uint) AssemblyAttributes.PublicKey); }
+			set { attributes = attributes.SetAttributes ((uint) AssemblyAttributes.PublicKey, value); }
+		}
+
+		public bool IsSideBySideCompatible {
+			get { return attributes.GetAttributes ((uint) AssemblyAttributes.SideBySideCompatible); }
+			set { attributes = attributes.SetAttributes ((uint) AssemblyAttributes.SideBySideCompatible, value); }
+		}
+
+		public bool IsRetargetable {
+			get { return attributes.GetAttributes ((uint) AssemblyAttributes.Retargetable); }
+			set { attributes = attributes.SetAttributes ((uint) AssemblyAttributes.Retargetable, value); }
+		}
+
+		public bool IsWindowsRuntime {
+			get { return attributes.GetAttributes ((uint) AssemblyAttributes.WindowsRuntime); }
+			set { attributes = attributes.SetAttributes ((uint) AssemblyAttributes.WindowsRuntime, value); }
+		}
+
+		public byte [] PublicKey {
+			get { return public_key ?? Empty<byte>.Array; }
+			set {
+				public_key = value;
+				HasPublicKey = !public_key.IsNullOrEmpty ();
+				public_key_token = Empty<byte>.Array;
+				full_name = null;
+			}
+		}
+
+		public byte [] PublicKeyToken {
+			get {
+				if (public_key_token.IsNullOrEmpty () && !public_key.IsNullOrEmpty ()) {
+					var hash = HashPublicKey ();
+					// we need the last 8 bytes in reverse order
+					var local_public_key_token = new byte [8];
+					Array.Copy (hash, (hash.Length - 8), local_public_key_token, 0, 8);
+					Array.Reverse (local_public_key_token, 0, 8);
+					public_key_token = local_public_key_token; // publish only once finished (required for thread-safety)
+				}
+				return public_key_token ?? Empty<byte>.Array;
+			}
+			set {
+				public_key_token = value;
+				full_name = null;
+			}
+		}
+
+		byte [] HashPublicKey ()
+		{
+#if !PCL
+			HashAlgorithm algorithm;
+
+			switch (hash_algorithm) {
+			case AssemblyHashAlgorithm.Reserved:
+				algorithm = MD5.Create ();
+				break;
+			default:
+				// None default to SHA1
+				algorithm = SHA1.Create ();
+				break;
+			}
+
+			using (algorithm)
+				return algorithm.ComputeHash (public_key);
+#else
+			if (hash_algorithm != AssemblyHashAlgorithm.SHA1)
+				throw new NotSupportedException ();
+
+			return new SHA1Managed ().ComputeHash (public_key);
+#endif
+		}
+
+		public virtual MetadataScopeType MetadataScopeType {
+			get { return MetadataScopeType.AssemblyNameReference; }
+		}
+
+		public string FullName {
+			get {
+				if (full_name != null)
+					return full_name;
+
+				const string sep = ", ";
+
+				var builder = new StringBuilder ();
+				builder.Append (name);
+				builder.Append (sep);
+				builder.Append ("Version=");
+				builder.Append (version.ToString (fieldCount: 4));
+				builder.Append (sep);
+				builder.Append ("Culture=");
+				builder.Append (string.IsNullOrEmpty (culture) ? "neutral" : culture);
+				builder.Append (sep);
+				builder.Append ("PublicKeyToken=");
+
+				var pk_token = PublicKeyToken;
+				if (!pk_token.IsNullOrEmpty () && pk_token.Length > 0) {
+					for (int i = 0 ; i < pk_token.Length ; i++) {
+						builder.Append (pk_token [i].ToString ("x2"));
+					}
+				} else
+					builder.Append ("null");
+
+				if (IsRetargetable) {
+					builder.Append (sep);
+					builder.Append ("Retargetable=Yes");
+				}
+
+				return full_name = builder.ToString ();
+			}
+		}
+
+		public static AssemblyNameReference Parse (string fullName)
+		{
+			if (fullName == null)
+				throw new ArgumentNullException ("fullName");
+			if (fullName.Length == 0)
+				throw new ArgumentException ("Name can not be empty");
+
+			var name = new AssemblyNameReference ();
+			var tokens = fullName.Split (',');
+			for (int i = 0; i < tokens.Length; i++) {
+				var token = tokens [i].Trim ();
+
+				if (i == 0) {
+					name.Name = token;
+					continue;
+				}
+
+				var parts = token.Split ('=');
+				if (parts.Length != 2)
+					throw new ArgumentException ("Malformed name");
+
+				switch (parts [0].ToLowerInvariant ()) {
+				case "version":
+					name.Version = new Version (parts [1]);
+					break;
+				case "culture":
+					name.Culture = parts [1] == "neutral" ? "" : parts [1];
+					break;
+				case "publickeytoken":
+					var pk_token = parts [1];
+					if (pk_token == "null")
+						break;
+
+					name.PublicKeyToken = new byte [pk_token.Length / 2];
+					for (int j = 0; j < name.PublicKeyToken.Length; j++)
+						name.PublicKeyToken [j] = Byte.Parse (pk_token.Substring (j * 2, 2), NumberStyles.HexNumber);
+
+					break;
+				}
+			}
+
+			return name;
+		}
+
+		public AssemblyHashAlgorithm HashAlgorithm {
+			get { return hash_algorithm; }
+			set { hash_algorithm = value; }
+		}
+
+		public virtual byte [] Hash {
+			get { return hash; }
+			set { hash = value; }
+		}
+
+		public MetadataToken MetadataToken {
+			get { return token; }
+			set { token = value; }
+		}
+
+		internal AssemblyNameReference ()
+		{
+			this.version = Mixin.ZeroVersion;
+			this.token = new MetadataToken (TokenType.AssemblyRef);
+		}
+
+		public AssemblyNameReference (string name, Version version)
+		{
+			if (name == null)
+				throw new ArgumentNullException ("name");
+
+			this.name = name;
+			this.version = Mixin.CheckVersion (version);
+			this.hash_algorithm = AssemblyHashAlgorithm.None;
+			this.token = new MetadataToken (TokenType.AssemblyRef);
+		}
+
+		public override string ToString ()
+		{
+			return this.FullName;
+		}
+	}
+
+	partial class Mixin {
+
+		public static Version ZeroVersion = new Version (0, 0, 0 ,0);
+
+		public static Version CheckVersion (Version version)
+		{
+			if (version == null)
+				return ZeroVersion;
+
+			if (version.Build == -1)
+				return new Version (version.Major, version.Minor, 0, 0);
+
+			if (version.Revision == -1)
+				return new Version (version.Major, version.Minor, version.Build, 0);
+
+			return version;
+		}
+	}
+}