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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Generic;
using System.Reflection.Metadata;
using Debug = System.Diagnostics.Debug;
namespace Internal.TypeSystem.Ecma
{
// This file has implementations of the .MethodImpl.cs logic from its base type.
public sealed partial class EcmaType : MetadataType
{
// Virtual function related functionality
public override MethodImplRecord[] FindMethodsImplWithMatchingDeclName(string declName)
{
MetadataReader metadataReader = _module.MetadataReader;
var stringComparer = metadataReader.StringComparer;
ArrayBuilder<MethodImplRecord> foundRecords = default(ArrayBuilder<MethodImplRecord>);
foreach (var methodImplHandle in _typeDefinition.GetMethodImplementations())
{
MethodImplementation methodImpl = metadataReader.GetMethodImplementation(methodImplHandle);
EntityHandle methodDeclCheckHandle = methodImpl.MethodDeclaration;
HandleKind methodDeclHandleKind = methodDeclCheckHandle.Kind;
// We want to check that the method name matches before actually getting the MethodDesc. For MethodSpecifications
// we need to dereference that handle to the underlying member reference to look at name matching.
if (methodDeclHandleKind == HandleKind.MethodSpecification)
{
methodDeclCheckHandle = metadataReader.GetMethodSpecification((MethodSpecificationHandle)methodDeclCheckHandle).Method;
methodDeclHandleKind = methodDeclCheckHandle.Kind;
}
bool foundRecord = false;
switch (methodDeclHandleKind)
{
case HandleKind.MethodDefinition:
if (stringComparer.Equals(metadataReader.GetMethodDefinition((MethodDefinitionHandle)methodDeclCheckHandle).Name, declName))
{
foundRecord = true;
}
break;
case HandleKind.MemberReference:
if (stringComparer.Equals(metadataReader.GetMemberReference((MemberReferenceHandle)methodDeclCheckHandle).Name, declName))
{
foundRecord = true;
}
break;
default:
Debug.Fail("unexpected methodDeclHandleKind");
break;
}
if (foundRecord)
{
MethodImplRecord newRecord = new MethodImplRecord(
(MethodDesc)_module.GetObject(methodImpl.MethodDeclaration),
(MethodDesc)_module.GetObject(methodImpl.MethodBody));
foundRecords.Add(newRecord);
}
}
if (foundRecords.Count != 0)
return foundRecords.ToArray();
return null;
}
protected override MethodImplRecord[] ComputeVirtualMethodImplsForType()
{
ArrayBuilder<MethodImplRecord> records = default(ArrayBuilder<MethodImplRecord>);
MetadataReader metadataReader = _module.MetadataReader;
foreach (var methodImplHandle in _typeDefinition.GetMethodImplementations())
{
MethodImplementation methodImpl = metadataReader.GetMethodImplementation(methodImplHandle);
EntityHandle methodDeclCheckHandle = methodImpl.MethodDeclaration;
HandleKind methodDeclHandleKind = methodDeclCheckHandle.Kind;
// We want to check that the type is not an interface matches before actually getting the MethodDesc.
// For MethodSpecifications we need to dereference that handle to the underlying member reference to
// look at the owning type.
if (methodDeclHandleKind == HandleKind.MethodSpecification)
{
methodDeclCheckHandle = metadataReader.GetMethodSpecification((MethodSpecificationHandle)methodDeclCheckHandle).Method;
methodDeclHandleKind = methodDeclCheckHandle.Kind;
}
MetadataType owningType = null;
switch (methodDeclHandleKind)
{
case HandleKind.MethodDefinition:
owningType = ((MethodDesc)_module.GetObject(methodDeclCheckHandle)).OwningType as MetadataType;
break;
case HandleKind.MemberReference:
EntityHandle owningTypeHandle = metadataReader.GetMemberReference((MemberReferenceHandle)methodDeclCheckHandle).Parent;
owningType = _module.GetObject(owningTypeHandle) as MetadataType;
break;
default:
Debug.Fail("unexpected methodDeclHandleKind");
break;
}
if (!owningType.IsInterface)
{
MethodImplRecord newRecord = new MethodImplRecord(
(MethodDesc)_module.GetObject(methodImpl.MethodDeclaration),
(MethodDesc)_module.GetObject(methodImpl.MethodBody));
records.Add(newRecord);
}
}
return records.ToArray();
}
}
}
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