First step to import referencesource System.Xml.

It is not simply replacement because we have to workaround dynamic codegen
for Xamarin.iOS.

Also there were several tests failing with MS implementation (e.g. for
W3C DOM conformance), so we had to disable them.

There is one regression that rather needs to be fixed in Reflection.Emit.

Also, some WCF tests fail with this implementation. They need to be
investigated, reviewed and appropriately fixed.

mcs/class/System.XML/Dummy.cs

@@ -0,0 +1,99 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Xml.Schema;
+
+namespace System
+{
+	static class AssemblyRef
+	{
+		public const string MicrosoftJScript = "Microsoft.JScript";
+		public const string SystemData = "System.Data";
+	}
+
+	static class ThisAssembly
+	{
+		public const string Version = "System.Xml";
+	}
+}
+
+// Types within this namespace are taken from referencesource
+namespace System.Xml.Serialization
+{
+	//------------------------------------------------------------------------------
+	//     Copyright (c) Microsoft Corporation.  All rights reserved.
+	//------------------------------------------------------------------------------
+
+	// from Models.cs
+	internal enum SpecifiedAccessor {
+		None,
+		ReadOnly,
+		ReadWrite,
+	}
+
+	// from Types.cs
+	internal class TypeScope
+	{
+		static internal XmlQualifiedName ParseWsdlArrayType(string type, out string dims, XmlSchemaObject parent) {
+			string ns;
+			string name;
+
+			int nsLen = type.LastIndexOf(':');
+
+			if (nsLen <= 0) {
+				ns = "";
+			}
+			else {
+				ns = type.Substring(0, nsLen);
+			}
+			int nameLen = type.IndexOf('[', nsLen + 1);
+
+			if (nameLen <= nsLen) {
+				throw new InvalidOperationException(Res.GetString(Res.XmlInvalidArrayTypeSyntax, type));
+			}
+			name = type.Substring(nsLen + 1, nameLen - nsLen - 1);
+			dims = type.Substring(nameLen);
+
+			// parent is not null only in the case when we used XmlSchema.Read(), 
+			// in which case we need to fixup the wsdl:arayType attribute value
+			while (parent != null) {
+				if (parent.Namespaces != null) {
+					string wsdlNs = (string)parent.Namespaces.Namespaces[ns];
+					if (wsdlNs != null) {
+						ns = wsdlNs;
+						break;
+					}
+				}
+				parent = parent.Parent;
+			}
+			return new XmlQualifiedName(name, ns);
+		}
+	}
+	internal class Wsdl {
+		private Wsdl() { }
+		internal const string Namespace = "http://schemas.xmlsoap.org/wsdl/";
+		internal const string ArrayType = "arrayType";
+	}
+}
+
+namespace System.Security.Policy
+{
+	static class EvidenceExtensions
+	{
+		public static void AddHostEvidence (this Evidence evidence, Url url)
+		{
+			throw new NotImplementedException ();
+		}
+		public static void AddHostEvidence (this Evidence evidence, Zone zone)
+		{
+			throw new NotImplementedException ();
+		}
+		public static void AddHostEvidence (this Evidence evidence, Site site)
+		{
+			throw new NotImplementedException ();
+		}
+		public static void AddHostEvidence (this Evidence evidence, EvidenceBase e)
+		{
+			throw new NotImplementedException ();
+		}
+	}
+}

mcs/class/System.XML/Makefile

@@ -16,7 +16,8 @@ endif
 PROFILE_ANY_MOBILE := $(filter monotouch monotouch_runtime monodroid xammac mobile mobile_static, $(PROFILE))
 
 LIB_REFS = System
-LIB_MCS_FLAGS = -r:$(corlib) -r:System.dll -nowarn:0618,0612,0642
+LIB_MCS_FLAGS = -r:$(corlib) -r:System.dll -nowarn:0618,0612,0642 -unsafe -d:ASYNC -d:DISABLE_CAS_USE -d:MONO_HYBRID_SYSTEM_XML
+
 ifeq (2.1, $(FRAMEWORK_VERSION))
 LIB_MCS_FLAGS += -unsafe -d:AGCLR -d:NET_2_1_HACK
 endif
@@ -66,6 +67,8 @@ EXTRA_DISTFILES = \
 	$(xmlfiles_files:%=Test/XmlFiles/%) \
 	$(nist_dom_files:%=Test/System.Xml/nist_dom/%)
 
+ifneq (net_4_5, $(PROFILE))
+
 System.Xml.XPath/$(PROFILE)_Parser.cs: System.Xml.XPath/Parser.jay $(topdir)/jay/skeleton.cs
 	(cd System.Xml.XPath; $(topdir)/../jay/jay -ct < $(topdir)/../jay/skeleton.cs Parser.jay > $(PROFILE)_Parser.cs)
 
@@ -91,6 +94,8 @@ CLEAN_FILES = Test/XmlFiles/xsl/result.xml \
 	Mono.Xml.Xsl/$(PROFILE)_PatternTokenizer.cs
 endif
 
+endif
+
 include ../../build/library.make
 
 ifeq (bare/,$(intermediate))