359 строки
14 KiB
C#
359 строки
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using Mono.Cecil;
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using Mono.Cecil.Rocks;
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namespace Xamarin.Forms.Build.Tasks
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{
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class TypeRefComparer : IEqualityComparer<TypeReference>
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{
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static string GetAssembly(TypeReference typeRef)
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{
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var md = typeRef.Scope as ModuleDefinition;
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if (md != null)
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return md.Assembly.FullName;
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var anr = typeRef.Scope as AssemblyNameReference;
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if (anr != null)
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return anr.FullName;
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throw new ArgumentOutOfRangeException(nameof(typeRef));
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}
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public bool Equals(TypeReference x, TypeReference y)
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{
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if (x == null)
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return y == null;
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if (y == null)
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return x == null;
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//strip the leading `&` as byref typered fullnames have a `&`
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var xname = x.FullName.EndsWith("&", StringComparison.InvariantCulture) ? x.FullName.Substring(0, x.FullName.Length - 1) : x.FullName;
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var yname = y.FullName.EndsWith("&", StringComparison.InvariantCulture) ? y.FullName.Substring(0, y.FullName.Length - 1) : y.FullName;
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if (xname != yname)
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return false;
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var xasm = GetAssembly(x);
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var yasm = GetAssembly(y);
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//standard types comes from either mscorlib. System.Runtime or netstandard. Assume they are equivalent
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if (( xasm.StartsWith("System.Runtime", StringComparison.Ordinal)
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|| xasm.StartsWith("System", StringComparison.Ordinal)
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|| xasm.StartsWith("mscorlib", StringComparison.Ordinal)
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|| xasm.StartsWith("netstandard", StringComparison.Ordinal)
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|| xasm.StartsWith("System.Xml", StringComparison.Ordinal))
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&& ( yasm.StartsWith("System.Runtime", StringComparison.Ordinal)
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|| yasm.StartsWith("System", StringComparison.Ordinal)
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|| yasm.StartsWith("mscorlib", StringComparison.Ordinal)
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|| yasm.StartsWith("netstandard", StringComparison.Ordinal)
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|| yasm.StartsWith("System.Xml", StringComparison.Ordinal)))
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return true;
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return xasm == yasm;
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}
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public int GetHashCode(TypeReference obj)
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{
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return $"{GetAssembly(obj)}//{obj.FullName}".GetHashCode();
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}
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static TypeRefComparer s_default;
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public static TypeRefComparer Default => s_default ?? (s_default = new TypeRefComparer());
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}
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static class TypeReferenceExtensions
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{
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public static PropertyDefinition GetProperty(this TypeReference typeRef, Func<PropertyDefinition, bool> predicate,
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out TypeReference declaringTypeRef)
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{
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declaringTypeRef = typeRef;
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var typeDef = typeRef.ResolveCached();
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var properties = typeDef.Properties.Where(predicate);
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if (properties.Any())
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return properties.Single();
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if (typeDef.BaseType == null || typeDef.BaseType.FullName == "System.Object")
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return null;
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return typeDef.BaseType.ResolveGenericParameters(typeRef).GetProperty(predicate, out declaringTypeRef);
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}
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public static EventDefinition GetEvent(this TypeReference typeRef, Func<EventDefinition, bool> predicate,
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out TypeReference declaringTypeRef)
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{
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declaringTypeRef = typeRef;
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var typeDef = typeRef.ResolveCached();
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var events = typeDef.Events.Where(predicate);
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if (events.Any()) {
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var ev = events.Single();
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return ev.ResolveGenericEvent(declaringTypeRef);
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}
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if (typeDef.BaseType == null || typeDef.BaseType.FullName == "System.Object")
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return null;
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return typeDef.BaseType.ResolveGenericParameters(typeRef).GetEvent(predicate, out declaringTypeRef);
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}
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//this resolves generic eventargs (https://bugzilla.xamarin.com/show_bug.cgi?id=57574)
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static EventDefinition ResolveGenericEvent(this EventDefinition eventDef, TypeReference declaringTypeRef)
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{
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if (eventDef == null)
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throw new ArgumentNullException(nameof(eventDef));
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if (declaringTypeRef == null)
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throw new ArgumentNullException(nameof(declaringTypeRef));
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if (!eventDef.EventType.IsGenericInstance)
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return eventDef;
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if (eventDef.EventType.ResolveCached().FullName != "System.EventHandler`1")
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return eventDef;
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var git = eventDef.EventType as GenericInstanceType;
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var ga = git.GenericArguments.First();
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ga = ga.ResolveGenericParameters(declaringTypeRef);
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git.GenericArguments[0] = ga;
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eventDef.EventType = git;
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return eventDef;
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}
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public static FieldDefinition GetField(this TypeReference typeRef, Func<FieldDefinition, bool> predicate,
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out TypeReference declaringTypeRef)
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{
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declaringTypeRef = typeRef;
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var typeDef = typeRef.ResolveCached();
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var bp = typeDef.Fields.Where
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(predicate);
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if (bp.Any())
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return bp.Single();
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if (typeDef.BaseType == null || typeDef.BaseType.FullName == "System.Object")
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return null;
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return typeDef.BaseType.ResolveGenericParameters(typeRef).GetField(predicate, out declaringTypeRef);
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}
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public static bool ImplementsInterface(this TypeReference typeRef, TypeReference @interface)
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{
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var typeDef = typeRef.ResolveCached();
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if (typeDef.Interfaces.Any(tr => tr.InterfaceType.FullName == @interface.FullName))
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return true;
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var baseTypeRef = typeDef.BaseType;
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if (baseTypeRef != null && baseTypeRef.FullName != "System.Object")
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return baseTypeRef.ImplementsInterface(@interface);
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return false;
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}
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public static bool ImplementsGenericInterface(this TypeReference typeRef, string @interface,
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out GenericInstanceType interfaceReference, out IList<TypeReference> genericArguments)
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{
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interfaceReference = null;
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genericArguments = null;
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var typeDef = typeRef.ResolveCached();
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InterfaceImplementation iface;
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if ((iface = typeDef.Interfaces.FirstOrDefault(tr =>
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tr.InterfaceType.FullName.StartsWith(@interface, StringComparison.Ordinal) &&
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tr.InterfaceType.IsGenericInstance && (tr.InterfaceType as GenericInstanceType).HasGenericArguments)) != null)
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{
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interfaceReference = iface.InterfaceType as GenericInstanceType;
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genericArguments = (iface.InterfaceType as GenericInstanceType).GenericArguments;
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return true;
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}
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var baseTypeRef = typeDef.BaseType;
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if (baseTypeRef != null && baseTypeRef.FullName != "System.Object")
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return baseTypeRef.ImplementsGenericInterface(@interface, out interfaceReference, out genericArguments);
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return false;
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}
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static readonly string[] arrayInterfaces = {
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"System.ICloneable",
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"System.Collections.IEnumerable",
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"System.Collections.IList",
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"System.Collections.ICollection",
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"System.Collections.IStructuralComparable",
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"System.Collections.IStructuralEquatable",
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};
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static readonly string[] arrayGenericInterfaces = {
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"System.Collections.Generic.IEnumerable`1",
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"System.Collections.Generic.IList`1",
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"System.Collections.Generic.ICollection`1",
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"System.Collections.Generic.IReadOnlyCollection`1",
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"System.Collections.Generic.IReadOnlyList`1",
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};
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public static bool InheritsFromOrImplements(this TypeReference typeRef, TypeReference baseClass)
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{
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if (TypeRefComparer.Default.Equals(typeRef, baseClass))
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return true;
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if (typeRef.IsValueType)
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return false;
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if (typeRef.IsArray) {
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var array = (ArrayType)typeRef;
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var arrayType = typeRef.ResolveCached();
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if (arrayInterfaces.Contains(baseClass.FullName))
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return true;
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if (array.IsVector && //generic interfaces are not implemented on multidimensional arrays
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arrayGenericInterfaces.Contains(baseClass.ResolveCached().FullName) &&
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baseClass.IsGenericInstance &&
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TypeRefComparer.Default.Equals((baseClass as GenericInstanceType).GenericArguments[0], arrayType))
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return true;
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return baseClass.FullName == "System.Object";
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}
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if (typeRef.FullName == "System.Object")
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return false;
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var typeDef = typeRef.ResolveCached();
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if (TypeRefComparer.Default.Equals(typeDef, baseClass.ResolveCached()))
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return true;
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if (typeDef.Interfaces.Any(ir => TypeRefComparer.Default.Equals(ir.InterfaceType.ResolveGenericParameters(typeRef), baseClass)))
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return true;
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if (typeDef.BaseType == null)
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return false;
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typeRef = typeDef.BaseType.ResolveGenericParameters(typeRef);
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return typeRef.InheritsFromOrImplements(baseClass);
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}
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static CustomAttribute GetCustomAttribute(this TypeReference typeRef, TypeReference attribute)
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{
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var typeDef = typeRef.ResolveCached();
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//FIXME: avoid string comparison. make sure the attribute TypeRef is the same one
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var attr = typeDef.CustomAttributes.SingleOrDefault(ca => ca.AttributeType.FullName == attribute.FullName);
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if (attr != null)
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return attr;
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var baseTypeRef = typeDef.BaseType;
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if (baseTypeRef != null && baseTypeRef.FullName != "System.Object")
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return baseTypeRef.GetCustomAttribute(attribute);
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return null;
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}
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public static CustomAttribute GetCustomAttribute(this TypeReference typeRef, ModuleDefinition module, (string assemblyName, string clrNamespace, string typeName) attributeType)
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{
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return typeRef.GetCustomAttribute(module.ImportReference(attributeType));
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}
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[Obsolete]
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public static MethodDefinition GetMethod(this TypeReference typeRef, Func<MethodDefinition, bool> predicate)
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{
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TypeReference declaringTypeReference;
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return typeRef.GetMethod(predicate, out declaringTypeReference);
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}
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[Obsolete]
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public static MethodDefinition GetMethod(this TypeReference typeRef, Func<MethodDefinition, bool> predicate,
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out TypeReference declaringTypeRef)
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{
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declaringTypeRef = typeRef;
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var typeDef = typeRef.ResolveCached();
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var methods = typeDef.Methods.Where(predicate);
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if (methods.Any())
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return methods.Single();
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if (typeDef.BaseType != null && typeDef.BaseType.FullName == "System.Object")
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return null;
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if (typeDef.IsInterface)
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{
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foreach (var face in typeDef.Interfaces)
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{
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var m = face.InterfaceType.GetMethod(predicate);
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if (m != null)
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return m;
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}
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return null;
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}
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return typeDef.BaseType.GetMethod(predicate, out declaringTypeRef);
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}
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public static IEnumerable<Tuple<MethodDefinition, TypeReference>> GetMethods(this TypeReference typeRef,
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Func<MethodDefinition, bool> predicate, ModuleDefinition module)
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{
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return typeRef.GetMethods((md, tr) => predicate(md), module);
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}
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public static IEnumerable<Tuple<MethodDefinition, TypeReference>> GetMethods(this TypeReference typeRef,
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Func<MethodDefinition, TypeReference, bool> predicate, ModuleDefinition module)
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{
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var typeDef = typeRef.ResolveCached();
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foreach (var method in typeDef.Methods.Where(md => predicate(md, typeRef)))
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yield return new Tuple<MethodDefinition, TypeReference>(method, typeRef);
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if (typeDef.IsInterface)
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{
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foreach (var face in typeDef.Interfaces)
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{
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if (face.InterfaceType.IsGenericInstance && typeRef is GenericInstanceType)
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{
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int i = 0;
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foreach (var arg in ((GenericInstanceType)typeRef).GenericArguments)
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((GenericInstanceType)face.InterfaceType).GenericArguments[i++] = module.ImportReference(arg);
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}
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foreach (var tuple in face.InterfaceType.GetMethods(predicate, module))
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yield return tuple;
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}
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yield break;
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}
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if (typeDef.BaseType == null || typeDef.BaseType.FullName == "System.Object")
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yield break;
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var baseType = typeDef.BaseType.ResolveGenericParameters(typeRef);
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foreach (var tuple in baseType.GetMethods(predicate, module))
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yield return tuple;
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}
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public static MethodReference GetImplicitOperatorTo(this TypeReference fromType, TypeReference toType, ModuleDefinition module)
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{
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if (TypeRefComparer.Default.Equals(fromType, toType))
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return null;
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var implicitOperatorsOnFromType = fromType.GetMethods(md => md.IsPublic
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&& md.IsStatic
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&& md.IsSpecialName
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&& md.Name == "op_Implicit", module);
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var implicitOperatorsOnToType = toType.GetMethods(md => md.IsPublic
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&& md.IsStatic
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&& md.IsSpecialName
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&& md.Name == "op_Implicit", module);
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var implicitOperators = implicitOperatorsOnFromType.Concat(implicitOperatorsOnToType).ToList();
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if (implicitOperators.Any()) {
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foreach (var op in implicitOperators) {
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var cast = op.Item1;
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var opDeclTypeRef = op.Item2;
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var castDef = module.ImportReference(cast).ResolveGenericParameters(opDeclTypeRef, module);
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var returnType = castDef.ReturnType;
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if (returnType.IsGenericParameter)
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returnType = ((GenericInstanceType)opDeclTypeRef).GenericArguments [((GenericParameter)returnType).Position];
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if (!returnType.InheritsFromOrImplements(toType))
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continue;
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var paramType = cast.Parameters[0].ParameterType;
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if (!fromType.InheritsFromOrImplements(paramType))
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continue;
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return castDef;
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}
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}
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return null;
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}
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public static TypeReference ResolveGenericParameters(this TypeReference self, TypeReference declaringTypeReference)
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{
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var genericself = self as GenericInstanceType;
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if (genericself == null)
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return self;
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var genericdeclType = declaringTypeReference as GenericInstanceType;
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if (genericdeclType == null)
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return self;
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if (!genericself.GenericArguments.Any(arg => arg.IsGenericParameter))
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return self;
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List<TypeReference> args = new List<TypeReference>();
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for (var i = 0; i < genericself.GenericArguments.Count; i++) {
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if (!genericself.GenericArguments[i].IsGenericParameter)
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args.Add(genericself.GenericArguments[i]);
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else
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args.Add(genericdeclType.GenericArguments[(genericself.GenericArguments[i] as GenericParameter).Position]);
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}
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return self.GetElementType().MakeGenericInstanceType(args.ToArray());
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}
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static Dictionary<TypeReference, TypeDefinition> resolves = new Dictionary<TypeReference, TypeDefinition>();
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public static TypeDefinition ResolveCached(this TypeReference typeReference)
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{
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if (resolves.TryGetValue(typeReference, out var typeDefinition))
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return typeDefinition;
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return (resolves[typeReference] = typeReference.Resolve());
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}
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}
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}
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