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// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using ICSharpCode.NRefactory.Semantics;
namespace ICSharpCode.NRefactory.TypeSystem.Implementation
{
[Serializable]
public sealed class UnresolvedSecurityDeclarationBlob
{
static readonly ITypeReference securityActionTypeReference = typeof(System.Security.Permissions.SecurityAction).ToTypeReference();
static readonly ITypeReference permissionSetAttributeTypeReference = typeof(System.Security.Permissions.PermissionSetAttribute).ToTypeReference();
readonly IConstantValue securityAction;
readonly byte[] blob;
readonly IList<IUnresolvedAttribute> unresolvedAttributes = new List<IUnresolvedAttribute>();
public UnresolvedSecurityDeclarationBlob(int securityAction, byte[] blob)
{
BlobReader reader = new BlobReader(blob, null);
this.securityAction = new SimpleConstantValue(securityActionTypeReference, securityAction);
this.blob = blob;
if (reader.ReadByte() == '.') {
// binary attribute
uint attributeCount = reader.ReadCompressedUInt32();
for (uint i = 0; i < attributeCount; i++) {
unresolvedAttributes.Add(new UnresolvedSecurityAttribute(this, (int)i));
}
} else {
// for backward compatibility with .NET 1.0: XML-encoded attribute
var attr = new DefaultUnresolvedAttribute(permissionSetAttributeTypeReference);
attr.ConstructorParameterTypes.Add(securityActionTypeReference);
attr.PositionalArguments.Add(this.securityAction);
string xml = System.Text.Encoding.Unicode.GetString(blob);
attr.AddNamedPropertyArgument("XML", new SimpleConstantValue(KnownTypeReference.String, xml));
unresolvedAttributes.Add(attr);
}
}
public IList<IUnresolvedAttribute> UnresolvedAttributes {
get { return unresolvedAttributes; }
}
public IList<IAttribute> Resolve(IAssembly currentAssembly)
{
// TODO: make this a per-assembly cache
// CacheManager cache = currentAssembly.Compilation.CacheManager;
// IList<IAttribute> result = (IList<IAttribute>)cache.GetShared(this);
// if (result != null)
// return result;
ITypeResolveContext context = new SimpleTypeResolveContext(currentAssembly);
BlobReader reader = new BlobReader(blob, currentAssembly);
if (reader.ReadByte() != '.') {
// should not use UnresolvedSecurityDeclaration for XML secdecls
throw new InvalidOperationException();
}
ResolveResult securityActionRR = securityAction.Resolve(context);
uint attributeCount = reader.ReadCompressedUInt32();
IAttribute[] attributes = new IAttribute[attributeCount];
try {
ReadSecurityBlob(reader, attributes, context, securityActionRR);
} catch (NotSupportedException ex) {
// ignore invalid blobs
Debug.WriteLine(ex.ToString());
}
for (int i = 0; i < attributes.Length; i++) {
if (attributes[i] == null)
attributes[i] = new CecilResolvedAttribute(context, SpecialType.UnknownType);
}
return attributes;
// return (IList<IAttribute>)cache.GetOrAddShared(this, attributes);
}
void ReadSecurityBlob(BlobReader reader, IAttribute[] attributes, ITypeResolveContext context, ResolveResult securityActionRR)
{
for (int i = 0; i < attributes.Length; i++) {
string attributeTypeName = reader.ReadSerString();
ITypeReference attributeTypeRef = ReflectionHelper.ParseReflectionName(attributeTypeName);
IType attributeType = attributeTypeRef.Resolve(context);
reader.ReadCompressedUInt32(); // ??
// The specification seems to be incorrect here, so I'm using the logic from Cecil instead.
uint numNamed = reader.ReadCompressedUInt32();
var namedArgs = new List<KeyValuePair<IMember, ResolveResult>>((int)numNamed);
for (uint j = 0; j < numNamed; j++) {
var namedArg = reader.ReadNamedArg(attributeType);
if (namedArg.Key != null)
namedArgs.Add(namedArg);
}
attributes[i] = new DefaultAttribute(
attributeType,
positionalArguments: new ResolveResult[] { securityActionRR },
namedArguments: namedArgs);
}
}
}
[Serializable]
sealed class UnresolvedSecurityAttribute : IUnresolvedAttribute, ISupportsInterning
{
readonly UnresolvedSecurityDeclarationBlob secDecl;
readonly int index;
public UnresolvedSecurityAttribute(UnresolvedSecurityDeclarationBlob secDecl, int index)
{
Debug.Assert(secDecl != null);
this.secDecl = secDecl;
this.index = index;
}
DomRegion IUnresolvedAttribute.Region {
get { return DomRegion.Empty; }
}
IAttribute IUnresolvedAttribute.CreateResolvedAttribute(ITypeResolveContext context)
{
return secDecl.Resolve(context.CurrentAssembly)[index];
}
int ISupportsInterning.GetHashCodeForInterning()
{
return index ^ secDecl.GetHashCode();
}
bool ISupportsInterning.EqualsForInterning(ISupportsInterning other)
{
UnresolvedSecurityAttribute attr = other as UnresolvedSecurityAttribute;
return attr != null && index == attr.index && secDecl == attr.secDecl;
}
}
}
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