392 lines
8.8 KiB
C#
392 lines
8.8 KiB
C#
//
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// Author:
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// Jb Evain (jbevain@gmail.com)
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//
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// Copyright (c) 2008 - 2015 Jb Evain
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// Copyright (c) 2008 - 2011 Novell, Inc.
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//
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// Licensed under the MIT/X11 license.
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//
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using MonoFN.Collections.Generic;
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using System;
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namespace MonoFN.Cecil {
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public interface IAssemblyResolver : IDisposable {
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AssemblyDefinition Resolve (AssemblyNameReference name);
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AssemblyDefinition Resolve (AssemblyNameReference name, ReaderParameters parameters);
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}
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public interface IMetadataResolver {
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TypeDefinition Resolve (TypeReference type);
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FieldDefinition Resolve (FieldReference field);
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MethodDefinition Resolve (MethodReference method);
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}
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#if !NET_CORE
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[Serializable]
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#endif
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public sealed class ResolutionException : Exception {
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readonly MemberReference member;
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public MemberReference Member {
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get { return member; }
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}
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public IMetadataScope Scope {
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get {
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var type = member as TypeReference;
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if (type != null)
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return type.Scope;
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var declaring_type = member.DeclaringType;
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if (declaring_type != null)
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return declaring_type.Scope;
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throw new NotSupportedException ();
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}
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}
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public ResolutionException (MemberReference member)
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: base ("Failed to resolve " + member.FullName)
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{
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if (member == null)
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throw new ArgumentNullException ("member");
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this.member = member;
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}
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public ResolutionException (MemberReference member, Exception innerException)
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: base ("Failed to resolve " + member.FullName, innerException)
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{
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if (member == null)
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throw new ArgumentNullException ("member");
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this.member = member;
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}
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#if !NET_CORE
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ResolutionException (
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System.Runtime.Serialization.SerializationInfo info,
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System.Runtime.Serialization.StreamingContext context)
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: base (info, context)
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{
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}
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#endif
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}
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public class MetadataResolver : IMetadataResolver {
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readonly IAssemblyResolver assembly_resolver;
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public IAssemblyResolver AssemblyResolver {
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get { return assembly_resolver; }
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}
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public MetadataResolver (IAssemblyResolver assemblyResolver)
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{
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if (assemblyResolver == null)
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throw new ArgumentNullException ("assemblyResolver");
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assembly_resolver = assemblyResolver;
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}
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public virtual TypeDefinition Resolve (TypeReference type)
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{
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Mixin.CheckType (type);
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type = type.GetElementType ();
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var scope = type.Scope;
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if (scope == null)
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return null;
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switch (scope.MetadataScopeType) {
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case MetadataScopeType.AssemblyNameReference:
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var assembly = assembly_resolver.Resolve ((AssemblyNameReference)scope);
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if (assembly == null)
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return null;
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return GetType (assembly.MainModule, type);
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case MetadataScopeType.ModuleDefinition:
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return GetType ((ModuleDefinition)scope, type);
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case MetadataScopeType.ModuleReference:
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if (type.Module.Assembly == null)
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return null;
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var modules = type.Module.Assembly.Modules;
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var module_ref = (ModuleReference)scope;
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for (int i = 0; i < modules.Count; i++) {
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var netmodule = modules [i];
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if (netmodule.Name == module_ref.Name)
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return GetType (netmodule, type);
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}
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break;
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}
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throw new NotSupportedException ();
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}
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static TypeDefinition GetType (ModuleDefinition module, TypeReference reference)
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{
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var type = GetTypeDefinition (module, reference);
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if (type != null)
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return type;
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if (!module.HasExportedTypes)
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return null;
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var exported_types = module.ExportedTypes;
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for (int i = 0; i < exported_types.Count; i++) {
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var exported_type = exported_types [i];
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if (exported_type.Name != reference.Name)
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continue;
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if (exported_type.Namespace != reference.Namespace)
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continue;
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return exported_type.Resolve ();
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}
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return null;
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}
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static TypeDefinition GetTypeDefinition (ModuleDefinition module, TypeReference type)
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{
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if (!type.IsNested)
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return module.GetType (type.Namespace, type.Name);
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var declaring_type = type.DeclaringType.Resolve ();
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if (declaring_type == null)
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return null;
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return declaring_type.GetNestedType (type.TypeFullName ());
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}
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public virtual FieldDefinition Resolve (FieldReference field)
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{
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Mixin.CheckField (field);
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var type = Resolve (field.DeclaringType);
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if (type == null)
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return null;
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if (!type.HasFields)
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return null;
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return GetField (type, field);
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}
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FieldDefinition GetField (TypeDefinition type, FieldReference reference)
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{
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while (type != null) {
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var field = GetField (type.Fields, reference);
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if (field != null)
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return field;
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if (type.BaseType == null)
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return null;
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type = Resolve (type.BaseType);
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}
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return null;
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}
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static FieldDefinition GetField (Collection<FieldDefinition> fields, FieldReference reference)
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{
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for (int i = 0; i < fields.Count; i++) {
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var field = fields [i];
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if (field.Name != reference.Name)
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continue;
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if (!AreSame (field.FieldType, reference.FieldType))
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continue;
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return field;
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}
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return null;
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}
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public virtual MethodDefinition Resolve (MethodReference method)
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{
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Mixin.CheckMethod (method);
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var type = Resolve (method.DeclaringType);
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if (type == null)
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return null;
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method = method.GetElementMethod ();
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if (!type.HasMethods)
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return null;
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return GetMethod (type, method);
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}
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MethodDefinition GetMethod (TypeDefinition type, MethodReference reference)
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{
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while (type != null) {
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var method = GetMethod (type.Methods, reference);
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if (method != null)
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return method;
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if (type.BaseType == null)
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return null;
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type = Resolve (type.BaseType);
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}
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return null;
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}
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public static MethodDefinition GetMethod (Collection<MethodDefinition> methods, MethodReference reference)
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{
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for (int i = 0; i < methods.Count; i++) {
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var method = methods [i];
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if (method.Name != reference.Name)
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continue;
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if (method.HasGenericParameters != reference.HasGenericParameters)
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continue;
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if (method.HasGenericParameters && method.GenericParameters.Count != reference.GenericParameters.Count)
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continue;
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if (!AreSame (method.ReturnType, reference.ReturnType))
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continue;
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if (method.IsVarArg () != reference.IsVarArg ())
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continue;
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if (method.IsVarArg () && IsVarArgCallTo (method, reference))
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return method;
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if (method.HasParameters != reference.HasParameters)
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continue;
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if (!method.HasParameters && !reference.HasParameters)
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return method;
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if (!AreSame (method.Parameters, reference.Parameters))
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continue;
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return method;
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}
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return null;
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}
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static bool AreSame (Collection<ParameterDefinition> a, Collection<ParameterDefinition> b)
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{
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var count = a.Count;
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if (count != b.Count)
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return false;
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if (count == 0)
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return true;
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for (int i = 0; i < count; i++)
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if (!AreSame (a [i].ParameterType, b [i].ParameterType))
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return false;
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return true;
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}
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static bool IsVarArgCallTo (MethodDefinition method, MethodReference reference)
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{
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if (method.Parameters.Count >= reference.Parameters.Count)
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return false;
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if (reference.GetSentinelPosition () != method.Parameters.Count)
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return false;
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for (int i = 0; i < method.Parameters.Count; i++)
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if (!AreSame (method.Parameters [i].ParameterType, reference.Parameters [i].ParameterType))
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return false;
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return true;
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}
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static bool AreSame (TypeSpecification a, TypeSpecification b)
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{
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if (!AreSame (a.ElementType, b.ElementType))
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return false;
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if (a.IsGenericInstance)
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return AreSame ((GenericInstanceType)a, (GenericInstanceType)b);
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if (a.IsRequiredModifier || a.IsOptionalModifier)
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return AreSame ((IModifierType)a, (IModifierType)b);
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if (a.IsArray)
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return AreSame ((ArrayType)a, (ArrayType)b);
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return true;
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}
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static bool AreSame (ArrayType a, ArrayType b)
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{
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if (a.Rank != b.Rank)
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return false;
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// TODO: dimensions
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return true;
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}
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static bool AreSame (IModifierType a, IModifierType b)
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{
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return AreSame (a.ModifierType, b.ModifierType);
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}
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static bool AreSame (GenericInstanceType a, GenericInstanceType b)
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{
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if (a.GenericArguments.Count != b.GenericArguments.Count)
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return false;
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for (int i = 0; i < a.GenericArguments.Count; i++)
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if (!AreSame (a.GenericArguments [i], b.GenericArguments [i]))
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return false;
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return true;
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}
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static bool AreSame (GenericParameter a, GenericParameter b)
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{
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return a.Position == b.Position;
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}
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static bool AreSame (TypeReference a, TypeReference b)
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{
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if (ReferenceEquals (a, b))
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return true;
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if (a == null || b == null)
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return false;
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if (a.etype != b.etype)
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return false;
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if (a.IsGenericParameter)
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return AreSame ((GenericParameter)a, (GenericParameter)b);
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if (a.IsTypeSpecification ())
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return AreSame ((TypeSpecification)a, (TypeSpecification)b);
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if (a.Name != b.Name || a.Namespace != b.Namespace)
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return false;
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return AreSame (a.DeclaringType, b.DeclaringType);
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}
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}
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}
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