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-rw-r--r--ICSharpCode.Decompiler/CecilExtensions.cs374
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diff --git a/ICSharpCode.Decompiler/CecilExtensions.cs b/ICSharpCode.Decompiler/CecilExtensions.cs
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--- a/ICSharpCode.Decompiler/CecilExtensions.cs
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-// Copyright (c) 2011 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.Linq;
-using Mono.Cecil;
-using Mono.Cecil.Cil;
-
-namespace ICSharpCode.Decompiler
-{
- /// <summary>
- /// Cecil helper methods.
- /// </summary>
- public static class CecilExtensions
- {
- #region GetPushDelta / GetPopDelta
- public static int GetPushDelta(this Instruction instruction)
- {
- OpCode code = instruction.OpCode;
- switch (code.StackBehaviourPush) {
- case StackBehaviour.Push0:
- return 0;
-
- case StackBehaviour.Push1:
- case StackBehaviour.Pushi:
- case StackBehaviour.Pushi8:
- case StackBehaviour.Pushr4:
- case StackBehaviour.Pushr8:
- case StackBehaviour.Pushref:
- return 1;
-
- case StackBehaviour.Push1_push1:
- return 2;
-
- case StackBehaviour.Varpush:
- if (code.FlowControl != FlowControl.Call)
- break;
-
- IMethodSignature method = (IMethodSignature) instruction.Operand;
- return IsVoid (method.ReturnType) ? 0 : 1;
- }
-
- throw new NotSupportedException ();
- }
-
- public static int? GetPopDelta(this Instruction instruction, MethodDefinition methodDef)
- {
- OpCode code = instruction.OpCode;
- switch (code.StackBehaviourPop) {
- case StackBehaviour.Pop0:
- return 0;
- case StackBehaviour.Popi:
- case StackBehaviour.Popref:
- case StackBehaviour.Pop1:
- return 1;
-
- case StackBehaviour.Pop1_pop1:
- case StackBehaviour.Popi_pop1:
- case StackBehaviour.Popi_popi:
- case StackBehaviour.Popi_popi8:
- case StackBehaviour.Popi_popr4:
- case StackBehaviour.Popi_popr8:
- case StackBehaviour.Popref_pop1:
- case StackBehaviour.Popref_popi:
- return 2;
-
- case StackBehaviour.Popi_popi_popi:
- case StackBehaviour.Popref_popi_popi:
- case StackBehaviour.Popref_popi_popi8:
- case StackBehaviour.Popref_popi_popr4:
- case StackBehaviour.Popref_popi_popr8:
- case StackBehaviour.Popref_popi_popref:
- return 3;
-
- case StackBehaviour.PopAll:
- return null;
-
- case StackBehaviour.Varpop:
- if (code == OpCodes.Ret)
- return methodDef.ReturnType.IsVoid() ? 0 : 1;
-
- if (code.FlowControl != FlowControl.Call)
- break;
-
- IMethodSignature method = (IMethodSignature) instruction.Operand;
- int count = method.HasParameters ? method.Parameters.Count : 0;
- if (method.HasThis && code != OpCodes.Newobj)
- ++count;
- if (code == OpCodes.Calli)
- ++count; // calli takes a function pointer in additional to the normal args
-
- return count;
- }
-
- throw new NotSupportedException ();
- }
-
- public static bool IsVoid(this TypeReference type)
- {
- while (type is OptionalModifierType || type is RequiredModifierType)
- type = ((TypeSpecification)type).ElementType;
- return type.MetadataType == MetadataType.Void;
- }
-
- public static bool IsValueTypeOrVoid(this TypeReference type)
- {
- while (type is OptionalModifierType || type is RequiredModifierType)
- type = ((TypeSpecification)type).ElementType;
- if (type is ArrayType)
- return false;
- return type.IsValueType || type.IsVoid();
- }
-
- /// <summary>
- /// checks if the given TypeReference is one of the following types:
- /// [sbyte, short, int, long, IntPtr]
- /// </summary>
- public static bool IsSignedIntegralType(this TypeReference type)
- {
- return type.MetadataType == MetadataType.SByte ||
- type.MetadataType == MetadataType.Int16 ||
- type.MetadataType == MetadataType.Int32 ||
- type.MetadataType == MetadataType.Int64 ||
- type.MetadataType == MetadataType.IntPtr;
- }
-
- /// <summary>
- /// checks if the given value is a numeric zero-value.
- /// NOTE that this only works for types: [sbyte, short, int, long, IntPtr, byte, ushort, uint, ulong, float, double and decimal]
- /// </summary>
- public static bool IsZero(this object value)
- {
- return value.Equals((sbyte)0) ||
- value.Equals((short)0) ||
- value.Equals(0) ||
- value.Equals(0L) ||
- value.Equals(IntPtr.Zero) ||
- value.Equals((byte)0) ||
- value.Equals((ushort)0) ||
- value.Equals(0u) ||
- value.Equals(0UL) ||
- value.Equals(0.0f) ||
- value.Equals(0.0) ||
- value.Equals((decimal)0);
-
- }
-
- #endregion
-
- /// <summary>
- /// Gets the (exclusive) end offset of this instruction.
- /// </summary>
- public static int GetEndOffset(this Instruction inst)
- {
- if (inst == null)
- throw new ArgumentNullException("inst");
- return inst.Offset + inst.GetSize();
- }
-
- public static string OffsetToString(int offset)
- {
- return string.Format("IL_{0:x4}", offset);
- }
-
- public static HashSet<MethodDefinition> GetAccessorMethods(this TypeDefinition type)
- {
- HashSet<MethodDefinition> accessorMethods = new HashSet<MethodDefinition>();
- foreach (var property in type.Properties) {
- accessorMethods.Add(property.GetMethod);
- accessorMethods.Add(property.SetMethod);
- if (property.HasOtherMethods) {
- foreach (var m in property.OtherMethods)
- accessorMethods.Add(m);
- }
- }
- foreach (EventDefinition ev in type.Events) {
- accessorMethods.Add(ev.AddMethod);
- accessorMethods.Add(ev.RemoveMethod);
- accessorMethods.Add(ev.InvokeMethod);
- if (ev.HasOtherMethods) {
- foreach (var m in ev.OtherMethods)
- accessorMethods.Add(m);
- }
- }
- return accessorMethods;
- }
-
- public static TypeDefinition ResolveWithinSameModule(this TypeReference type)
- {
- if (type != null && type.GetElementType().Module == type.Module)
- return type.Resolve();
- else
- return null;
- }
-
- public static FieldDefinition ResolveWithinSameModule(this FieldReference field)
- {
- if (field != null && field.DeclaringType.GetElementType().Module == field.Module)
- return field.Resolve();
- else
- return null;
- }
-
- public static MethodDefinition ResolveWithinSameModule(this MethodReference method)
- {
- if (method != null && method.DeclaringType.GetElementType().Module == method.Module)
- return method.Resolve();
- else
- return null;
- }
-
- [Obsolete("throwing exceptions is considered a bug")]
- public static TypeDefinition ResolveOrThrow(this TypeReference typeReference)
- {
- var resolved = typeReference.Resolve();
- if (resolved == null)
- throw new ReferenceResolvingException();
- return resolved;
- }
-
- public static bool IsCompilerGenerated(this ICustomAttributeProvider provider)
- {
- if (provider != null && provider.HasCustomAttributes) {
- foreach (CustomAttribute a in provider.CustomAttributes) {
- if (a.AttributeType.FullName == "System.Runtime.CompilerServices.CompilerGeneratedAttribute")
- return true;
- }
- }
- return false;
- }
-
- public static bool IsCompilerGeneratedOrIsInCompilerGeneratedClass(this IMemberDefinition member)
- {
- if (member == null)
- return false;
- if (member.IsCompilerGenerated())
- return true;
- return IsCompilerGeneratedOrIsInCompilerGeneratedClass(member.DeclaringType);
- }
-
- public static TypeReference GetEnumUnderlyingType(this TypeDefinition type)
- {
- if (!type.IsEnum)
- throw new ArgumentException("Type must be an enum", "type");
-
- var fields = type.Fields;
-
- for (int i = 0; i < fields.Count; i++)
- {
- var field = fields[i];
- if (!field.IsStatic)
- return field.FieldType;
- }
-
- throw new NotSupportedException();
- }
-
- public static bool IsAnonymousType(this TypeReference type)
- {
- if (type == null)
- return false;
- if (string.IsNullOrEmpty(type.Namespace) && type.HasGeneratedName() && (type.Name.Contains("AnonType") || type.Name.Contains("AnonymousType"))) {
- TypeDefinition td = type.Resolve();
- return td != null && td.IsCompilerGenerated();
- }
- return false;
- }
-
- public static bool HasGeneratedName(this MemberReference member)
- {
- return member.Name.StartsWith("<", StringComparison.Ordinal);
- }
-
- public static bool ContainsAnonymousType(this TypeReference type)
- {
- GenericInstanceType git = type as GenericInstanceType;
- if (git != null) {
- if (IsAnonymousType(git))
- return true;
- for (int i = 0; i < git.GenericArguments.Count; i++) {
- if (git.GenericArguments[i].ContainsAnonymousType())
- return true;
- }
- return false;
- }
- TypeSpecification typeSpec = type as TypeSpecification;
- if (typeSpec != null)
- return typeSpec.ElementType.ContainsAnonymousType();
- else
- return false;
- }
-
- public static string GetDefaultMemberName(this TypeDefinition type)
- {
- CustomAttribute attr;
- return type.GetDefaultMemberName(out attr);
- }
-
- public static string GetDefaultMemberName(this TypeDefinition type, out CustomAttribute defaultMemberAttribute)
- {
- if (type.HasCustomAttributes)
- foreach (CustomAttribute ca in type.CustomAttributes)
- if (ca.Constructor.DeclaringType.Name == "DefaultMemberAttribute" && ca.Constructor.DeclaringType.Namespace == "System.Reflection"
- && ca.Constructor.FullName == @"System.Void System.Reflection.DefaultMemberAttribute::.ctor(System.String)") {
- defaultMemberAttribute = ca;
- return ca.ConstructorArguments[0].Value as string;
- }
- defaultMemberAttribute = null;
- return null;
- }
-
- public static bool IsIndexer(this PropertyDefinition property)
- {
- CustomAttribute attr;
- return property.IsIndexer(out attr);
- }
-
- public static bool IsIndexer(this PropertyDefinition property, out CustomAttribute defaultMemberAttribute)
- {
- defaultMemberAttribute = null;
- if (property.HasParameters) {
- var accessor = property.GetMethod ?? property.SetMethod;
- PropertyDefinition basePropDef = property;
- if (accessor.HasOverrides) {
- // if the property is explicitly implementing an interface, look up the property in the interface:
- MethodDefinition baseAccessor = accessor.Overrides.First().Resolve();
- if (baseAccessor != null) {
- foreach (PropertyDefinition baseProp in baseAccessor.DeclaringType.Properties) {
- if (baseProp.GetMethod == baseAccessor || baseProp.SetMethod == baseAccessor) {
- basePropDef = baseProp;
- break;
- }
- }
- } else
- return false;
- }
- CustomAttribute attr;
- var defaultMemberName = basePropDef.DeclaringType.GetDefaultMemberName(out attr);
- if (defaultMemberName == basePropDef.Name) {
- defaultMemberAttribute = attr;
- return true;
- }
- }
- return false;
- }
-
- public static bool IsDelegate(this TypeDefinition type)
- {
- if (type.BaseType != null && type.BaseType.Namespace == "System") {
- if (type.BaseType.Name == "MulticastDelegate")
- return true;
- if (type.BaseType.Name == "Delegate" && type.Name != "MulticastDelegate")
- return true;
- }
- return false;
- }
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 04:02:54 +0000