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//
// MetadataResolver.cs
//
// Author:
// Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2011 Jb Evain
//
// 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 Mono.Collections.Generic;
namespace Mono.Cecil {
public interface IAssemblyResolver {
AssemblyDefinition Resolve (AssemblyNameReference name);
AssemblyDefinition Resolve (AssemblyNameReference name, ReaderParameters parameters);
AssemblyDefinition Resolve (string fullName);
AssemblyDefinition Resolve (string fullName, ReaderParameters parameters);
}
public class ResolutionException : Exception {
readonly MemberReference member;
public MemberReference Member {
get { return member; }
}
public ResolutionException (MemberReference member)
: base ("Failed to resolve " + member.FullName)
{
this.member = member;
}
}
static class MetadataResolver {
public static TypeDefinition Resolve (IAssemblyResolver resolver, TypeReference type)
{
type = type.GetElementType ();
var scope = type.Scope;
switch (scope.MetadataScopeType) {
case MetadataScopeType.AssemblyNameReference:
var assembly = resolver.Resolve ((AssemblyNameReference) scope);
if (assembly == null)
return null;
return GetType (resolver, assembly.MainModule, type);
case MetadataScopeType.ModuleDefinition:
return GetType (resolver, (ModuleDefinition) scope, type);
case MetadataScopeType.ModuleReference:
var modules = type.Module.Assembly.Modules;
var module_ref = (ModuleReference) scope;
for (int i = 0; i < modules.Count; i++) {
var netmodule = modules [i];
if (netmodule.Name == module_ref.Name)
return GetType (resolver, netmodule, type);
}
break;
}
throw new NotSupportedException ();
}
static TypeDefinition GetType (IAssemblyResolver resolver, ModuleDefinition module, TypeReference reference)
{
var type = GetType (module, reference);
if (type != null)
return type;
if (!module.HasExportedTypes)
return null;
var exported_types = module.ExportedTypes;
for (int i = 0; i < exported_types.Count; i++) {
var exported_type = exported_types [i];
if (exported_type.Name != reference.Name)
continue;
if (exported_type.Namespace != reference.Namespace)
continue;
return exported_type.Resolve ();
}
return null;
}
static TypeDefinition GetType (ModuleDefinition module, TypeReference type)
{
if (!type.IsNested)
return module.GetType (type.Namespace, type.Name);
var declaring_type = type.DeclaringType.Resolve ();
if (declaring_type == null)
return null;
return declaring_type.GetNestedType (type.Name);
}
public static FieldDefinition Resolve (IAssemblyResolver resolver, FieldReference field)
{
var type = Resolve (resolver, field.DeclaringType);
if (type == null)
return null;
if (!type.HasFields)
return null;
return GetField (resolver, type, field);
}
static FieldDefinition GetField (IAssemblyResolver resolver, TypeDefinition type, FieldReference reference)
{
while (type != null) {
var field = GetField (type.Fields, reference);
if (field != null)
return field;
if (type.BaseType == null)
return null;
type = Resolve (resolver, type.BaseType);
}
return null;
}
static FieldDefinition GetField (IList<FieldDefinition> fields, FieldReference reference)
{
for (int i = 0; i < fields.Count; i++) {
var field = fields [i];
if (field.Name != reference.Name)
continue;
if (!AreSame (field.FieldType, reference.FieldType))
continue;
return field;
}
return null;
}
public static MethodDefinition Resolve (IAssemblyResolver resolver, MethodReference method)
{
var type = Resolve (resolver, method.DeclaringType);
if (type == null)
return null;
method = method.GetElementMethod ();
if (!type.HasMethods)
return null;
return GetMethod (resolver, type, method);
}
static MethodDefinition GetMethod (IAssemblyResolver resolver, TypeDefinition type, MethodReference reference)
{
while (type != null) {
var method = GetMethod (type.Methods, reference);
if (method != null)
return method;
if (type.BaseType == null)
return null;
type = Resolve (resolver, type.BaseType);
}
return null;
}
public static MethodDefinition GetMethod (IList<MethodDefinition> methods, MethodReference reference)
{
for (int i = 0; i < methods.Count; i++) {
var method = methods [i];
if (method.Name != reference.Name)
continue;
if (method.HasGenericParameters != reference.HasGenericParameters)
continue;
if (method.HasGenericParameters && method.GenericParameters.Count != reference.GenericParameters.Count)
continue;
if (!AreSame (method.ReturnType, reference.ReturnType))
continue;
if (method.HasParameters != reference.HasParameters)
continue;
if (!method.HasParameters && !reference.HasParameters)
return method;
if (!AreSame (method.Parameters, reference.Parameters))
continue;
return method;
}
return null;
}
static bool AreSame (Collection<ParameterDefinition> a, Collection<ParameterDefinition> b)
{
var count = a.Count;
if (count != b.Count)
return false;
if (count == 0)
return true;
for (int i = 0; i < count; i++)
if (!AreSame (a [i].ParameterType, b [i].ParameterType))
return false;
return true;
}
static bool AreSame (TypeSpecification a, TypeSpecification b)
{
if (!AreSame (a.ElementType, b.ElementType))
return false;
if (a.IsGenericInstance)
return AreSame ((GenericInstanceType) a, (GenericInstanceType) b);
if (a.IsRequiredModifier || a.IsOptionalModifier)
return AreSame ((IModifierType) a, (IModifierType) b);
if (a.IsArray)
return AreSame ((ArrayType) a, (ArrayType) b);
return true;
}
static bool AreSame (ArrayType a, ArrayType b)
{
if (a.Rank != b.Rank)
return false;
// TODO: dimensions
return true;
}
static bool AreSame (IModifierType a, IModifierType b)
{
return AreSame (a.ModifierType, b.ModifierType);
}
static bool AreSame (GenericInstanceType a, GenericInstanceType b)
{
if (a.GenericArguments.Count != b.GenericArguments.Count)
return false;
for (int i = 0; i < a.GenericArguments.Count; i++)
if (!AreSame (a.GenericArguments [i], b.GenericArguments [i]))
return false;
return true;
}
static bool AreSame (GenericParameter a, GenericParameter b)
{
return a.Position == b.Position;
}
static bool AreSame (TypeReference a, TypeReference b)
{
if (ReferenceEquals (a, b))
return true;
if (a == null || b == null)
return false;
if (a.etype != b.etype)
return false;
if (a.IsGenericParameter)
return AreSame ((GenericParameter) a, (GenericParameter) b);
if (a.IsTypeSpecification ())
return AreSame ((TypeSpecification) a, (TypeSpecification) b);
if (a.Name != b.Name || a.Namespace != b.Namespace)
return false;
//TODO: check scope
return AreSame (a.DeclaringType, b.DeclaringType);
}
}
}
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