public static CustomAttributeValue <TypeDesc>?GetDecodedCustomAttribute(this EcmaField This,
string attributeNamespace, string attributeName)
{
var metadataReader = This.MetadataReader;
var attributeHandle = metadataReader.GetCustomAttributeHandle(metadataReader.GetFieldDefinition(This.Handle).GetCustomAttributes(),
attributeNamespace, attributeName);
if (attributeHandle.IsNil)
{
return(null);
}
return(metadataReader.GetCustomAttribute(attributeHandle).DecodeValue(new CustomAttributeTypeProvider(This.Module)));
}
/// <summary>
/// Retrieves the data associated with an RVA mapped field from the PE module.
/// </summary>
public static byte[] GetFieldRvaData(this EcmaField field)
{
Debug.Assert(field.HasRva);
int addr = field.MetadataReader.GetFieldDefinition(field.Handle).GetRelativeVirtualAddress();
var memBlock = field.Module.PEReader.GetSectionData(addr).GetContent();
int size = field.FieldType.GetElementSize();
if (size > memBlock.Length)
{
throw new BadImageFormatException();
}
byte[] result = new byte[size];
memBlock.CopyTo(0, result, 0, result.Length);
return(result);
}
/// <summary>
/// Retrieves the data associated with an RVA mapped field from the PE module.
/// </summary>
public static byte[] GetFieldRvaData(this EcmaField field)
{
Debug.Assert(field.HasRva);
int addr = field.MetadataReader.GetFieldDefinition(field.Handle).GetRelativeVirtualAddress();
var memBlock = field.Module.PEReader.GetSectionData(addr).GetContent();
var fieldType = (EcmaType)field.FieldType;
int size = fieldType.MetadataReader.GetTypeDefinition(fieldType.Handle).GetLayout().Size;
if (size == 0)
{
throw new NotImplementedException();
}
byte[] result = new byte[size];
memBlock.CopyTo(0, result, 0, result.Length);
return(result);
}
public static IEnumerable <CustomAttributeValue <TypeDesc> > GetDecodedCustomAttributes(this EcmaField This,
string attributeNamespace, string attributeName)
{
var metadataReader = This.MetadataReader;
var attributeHandles = metadataReader.GetFieldDefinition(This.Handle).GetCustomAttributes();
foreach (var attributeHandle in attributeHandles)
{
if (IsEqualCustomAttributeName(attributeHandle, metadataReader, attributeNamespace, attributeName))
{
yield return(metadataReader.GetCustomAttribute(attributeHandle).DecodeValue(new CustomAttributeTypeProvider(This.Module)));
}
}
}
protected override IEntityHandleObject CreateValueFromKey(EntityHandle handle)
{
object item;
switch (handle.Kind)
{
case HandleKind.TypeDefinition:
item = new EcmaType(_module, (TypeDefinitionHandle)handle);
break;
case HandleKind.MethodDefinition:
{
MethodDefinitionHandle methodDefinitionHandle = (MethodDefinitionHandle)handle;
TypeDefinitionHandle typeDefinitionHandle = _module._metadataReader.GetMethodDefinition(methodDefinitionHandle).GetDeclaringType();
EcmaType type = (EcmaType)_module.GetObject(typeDefinitionHandle);
item = new EcmaMethod(type, methodDefinitionHandle);
}
break;
case HandleKind.FieldDefinition:
{
FieldDefinitionHandle fieldDefinitionHandle = (FieldDefinitionHandle)handle;
TypeDefinitionHandle typeDefinitionHandle = _module._metadataReader.GetFieldDefinition(fieldDefinitionHandle).GetDeclaringType();
EcmaType type = (EcmaType)_module.GetObject(typeDefinitionHandle);
item = new EcmaField(type, fieldDefinitionHandle);
}
break;
case HandleKind.TypeReference:
item = _module.ResolveTypeReference((TypeReferenceHandle)handle);
break;
case HandleKind.MemberReference:
item = _module.ResolveMemberReference((MemberReferenceHandle)handle);
break;
case HandleKind.AssemblyReference:
item = _module.ResolveAssemblyReference((AssemblyReferenceHandle)handle);
break;
case HandleKind.TypeSpecification:
item = _module.ResolveTypeSpecification((TypeSpecificationHandle)handle);
break;
case HandleKind.MethodSpecification:
item = _module.ResolveMethodSpecification((MethodSpecificationHandle)handle);
break;
case HandleKind.ExportedType:
item = _module.ResolveExportedType((ExportedTypeHandle)handle);
break;
case HandleKind.StandaloneSignature:
item = _module.ResolveStandaloneSignature((StandaloneSignatureHandle)handle);
break;
case HandleKind.ModuleDefinition:
// ECMA-335 Partition 2 II.22.38 1d: This should not occur in a CLI ("compressed metadata") module,
// but resolves to "current module".
item = _module;
break;
default:
throw new BadImageFormatException("Unknown metadata token type: " + handle.Kind);
}
switch (handle.Kind)
{
case HandleKind.TypeDefinition:
case HandleKind.MethodDefinition:
case HandleKind.FieldDefinition:
// type/method/field definitions directly correspond to their target item.
return((IEntityHandleObject)item);
default:
// Everything else is some form of reference which cannot be self-describing
return(new EcmaObjectLookupWrapper(handle, item));
}
}
/// <summary>
/// Returns the RVA associated with an RVA mapped field from the PE module.
/// </summary>
public static int GetFieldRvaValue(this EcmaField field)
{
Debug.Assert(field.HasRva);
return(field.MetadataReader.GetFieldDefinition(field.Handle).GetRelativeVirtualAddress());
}
public static IEnumerable <CustomAttributeValue <TypeDesc> > GetDecodedCustomAttributes(this EcmaField This,
string attributeNamespace, string attributeName)
{
var metadataReader = This.MetadataReader;
var attributeHandles = metadataReader.GetFieldDefinition(This.Handle).GetCustomAttributes();
foreach (var attributeHandle in attributeHandles)
{
StringHandle namespaceHandle, nameHandle;
if (!metadataReader.GetAttributeNamespaceAndName(attributeHandle, out namespaceHandle, out nameHandle))
{
continue;
}
if (metadataReader.StringComparer.Equals(namespaceHandle, attributeNamespace) &&
metadataReader.StringComparer.Equals(nameHandle, attributeName))
{
yield return(metadataReader.GetCustomAttribute(attributeHandle).DecodeValue(new CustomAttributeTypeProvider(This.Module)));
}
}
}
protected override IEntityHandleObject CreateValueFromKey(EntityHandle handle)
{
object item;
switch (handle.Kind)
{
case HandleKind.TypeDefinition:
item = new EcmaType(_module, (TypeDefinitionHandle)handle);
break;
case HandleKind.MethodDefinition:
{
MethodDefinitionHandle methodDefinitionHandle = (MethodDefinitionHandle)handle;
TypeDefinitionHandle typeDefinitionHandle = _module._metadataReader.GetMethodDefinition(methodDefinitionHandle).GetDeclaringType();
EcmaType type = (EcmaType)_module.GetObject(typeDefinitionHandle);
item = new EcmaMethod(type, methodDefinitionHandle);
}
break;
case HandleKind.FieldDefinition:
{
FieldDefinitionHandle fieldDefinitionHandle = (FieldDefinitionHandle)handle;
TypeDefinitionHandle typeDefinitionHandle = _module._metadataReader.GetFieldDefinition(fieldDefinitionHandle).GetDeclaringType();
EcmaType type = (EcmaType)_module.GetObject(typeDefinitionHandle);
item = new EcmaField(type, fieldDefinitionHandle);
}
break;
case HandleKind.TypeReference:
item = _module.ResolveTypeReference((TypeReferenceHandle)handle);
break;
case HandleKind.MemberReference:
item = _module.ResolveMemberReference((MemberReferenceHandle)handle);
break;
case HandleKind.AssemblyReference:
item = _module.ResolveAssemblyReference((AssemblyReferenceHandle)handle);
break;
case HandleKind.TypeSpecification:
item = _module.ResolveTypeSpecification((TypeSpecificationHandle)handle);
break;
case HandleKind.MethodSpecification:
item = _module.ResolveMethodSpecification((MethodSpecificationHandle)handle);
break;
case HandleKind.ExportedType:
item = _module.ResolveExportedType((ExportedTypeHandle)handle);
break;
// TODO: Resolve other tokens
default:
throw new BadImageFormatException("Unknown metadata token type");
}
switch (handle.Kind)
{
case HandleKind.TypeDefinition:
case HandleKind.MethodDefinition:
case HandleKind.FieldDefinition:
// type/method/field definitions directly correspond to their target item.
return((IEntityHandleObject)item);
default:
// Everything else is some form of reference which cannot be self-describing
return(new EcmaObjectLookupWrapper(handle, item));
}
}
