public static CustomAttributeSignature FromReader(CustomAttribute parent, IBinaryStreamReader reader)
{
if (!reader.CanRead(sizeof(ushort)) || reader.ReadUInt16() != 0x0001)
{
throw new ArgumentException("Signature doesn't refer to a valid custom attribute signature.");
}
var signature = new CustomAttributeSignature();
if (parent.Constructor != null)
{
var methodSignature = parent.Constructor.Signature as MethodSignature;
if (methodSignature != null)
{
foreach (var parameter in methodSignature.Parameters)
{
signature.FixedArguments.Add(CustomAttributeArgument.FromReader(parent.Image, parameter.ParameterType, reader));
}
}
}
var namedElementCount = reader.CanRead(sizeof(ushort)) ? reader.ReadUInt16() : 0;
for (uint i = 0; i < namedElementCount; i++)
{
signature.NamedArguments.Add(CustomAttributeNamedArgument.FromReader(parent.Image, reader));
}
return(signature);
}
public static CustomAttributeSignature FromReader(CustomAttribute parent, IBinaryStreamReader reader)
{
long position = reader.Position;
if (!reader.CanRead(sizeof (ushort)) || reader.ReadUInt16() != 0x0001)
throw new ArgumentException("Signature doesn't refer to a valid custom attribute signature.");
var signature = new CustomAttributeSignature()
{
StartOffset = position,
};
if (parent.Constructor != null)
{
var methodSignature = parent.Constructor.Signature as MethodSignature;
if (methodSignature != null)
{
foreach (var parameter in methodSignature.Parameters)
{
signature.FixedArguments.Add(CustomAttributeArgument.FromReader(parent.Header,
parameter.ParameterType, reader));
}
}
}
var namedElementCount = reader.CanRead(sizeof (ushort)) ? reader.ReadUInt16() : 0;
for (uint i = 0; i < namedElementCount; i++)
{
signature.NamedArguments.Add(CustomAttributeNamedArgument.FromReader(parent.Header, reader));
}
return signature;
}
public void CreateAttributeWithEnumArgument()
{
// set up temp assembly.
var assembly = Utilities.CreateTempNetAssembly();
var tableStream = assembly.NetDirectory.MetadataHeader.GetStream<TableStream>();
var assemblyTable = tableStream.GetTable<AssemblyDefinition>();
var attributeTable = tableStream.GetTable<CustomAttribute>();
var importer = new ReferenceImporter(tableStream);
var assemblyDef = assemblyTable[0];
// create custom attribute.
var signature = new CustomAttributeSignature();
signature.FixedArguments.Add(
new CustomAttributeArgument(importer.ImportTypeSignature(typeof(DebuggableAttribute.DebuggingModes)),
new ElementSignature((int)DebuggableAttribute.DebuggingModes.Default)));
var attribute = new CustomAttribute(importer.ImportMethod(typeof(DebuggableAttribute).GetConstructor(new Type[]
{
typeof(DebuggableAttribute.DebuggingModes)
})), signature);
assemblyDef.CustomAttributes.Add(attribute);
attributeTable.Add(attribute);
// build and validate.
assembly = Utilities.RebuildNetAssembly(assembly);
tableStream = assembly.NetDirectory.MetadataHeader.GetStream<TableStream>();
assemblyTable = tableStream.GetTable<AssemblyDefinition>();
assemblyDef = assemblyTable[0];
attributeTable = tableStream.GetTable<CustomAttribute>();
var newAttribute = attributeTable[0];
Assert.IsTrue(assemblyDef.CustomAttributes.Contains(newAttribute));
Assert.AreEqual(attribute.Constructor.FullName, newAttribute.Constructor.FullName);
Assert.AreEqual(attribute.Signature.FixedArguments.Count, newAttribute.Signature.FixedArguments.Count);
for (int i = 0; i < attribute.Signature.FixedArguments.Count; i++)
Utilities.ValidateArgument(attribute.Signature.FixedArguments[i], newAttribute.Signature.FixedArguments[i]);
}
public void CreateAttributeWithNamedArgument()
{
const string fieldName = "MyField";
const string argumentValue = "MyXmlAttribute";
const string propertyName = "IsNullable";
const bool propertyValue = true;
// set up temp assembly.
var assembly = Utilities.CreateTempNetAssembly();
var typeSystem = assembly.NetDirectory.MetadataHeader.TypeSystem;
var tableStream = assembly.NetDirectory.MetadataHeader.GetStream<TableStream>();
var fieldTable = tableStream.GetTable<FieldDefinition>();
var attributeTable = tableStream.GetTable<CustomAttribute>();
var importer = new ReferenceImporter(tableStream);
// create temp field.
var field = new FieldDefinition(fieldName, FieldAttributes.Static, new FieldSignature(typeSystem.String));
fieldTable.Add(field);
// create custom attribute.
var signature = new CustomAttributeSignature();
signature.FixedArguments.Add(
new CustomAttributeArgument(typeSystem.String,
new ElementSignature(argumentValue)));
signature.NamedArguments.Add(
new CustomAttributeNamedArgument()
{
ArgumentMemberType = CustomAttributeArgumentMemberType.Property,
ArgumentType = typeSystem.Boolean,
MemberName = propertyName,
Argument = new CustomAttributeArgument(typeSystem.Boolean, new ElementSignature(propertyValue))
});
var attribute = new CustomAttribute(importer.ImportMethod(typeof(XmlAttributeAttribute).GetConstructor(new Type[]
{
typeof(string)
})), signature);
field.CustomAttributes.Add(attribute);
attributeTable.Add(attribute);
// build and validate.
assembly = Utilities.RebuildNetAssembly(assembly);
fieldTable = tableStream.GetTable<FieldDefinition>();
field = fieldTable.First(x => x.Name == fieldName);
attributeTable = tableStream.GetTable<CustomAttribute>();
var newAttribute = attributeTable[0];
Assert.IsTrue(field.CustomAttributes.Contains(newAttribute));
Assert.AreEqual(attribute.Constructor.FullName, newAttribute.Constructor.FullName);
Assert.AreEqual(attribute.Signature.FixedArguments.Count, newAttribute.Signature.FixedArguments.Count);
for (int i = 0; i < attribute.Signature.FixedArguments.Count; i++)
{
Utilities.ValidateArgument(attribute.Signature.FixedArguments[i],
newAttribute.Signature.FixedArguments[i]);
}
Assert.AreEqual(attribute.Signature.NamedArguments.Count, newAttribute.Signature.NamedArguments.Count);
for (int i = 0; i < attribute.Signature.NamedArguments.Count; i++)
{
Utilities.ValidateNamedArgument(attribute.Signature.NamedArguments[i],
newAttribute.Signature.NamedArguments[i]);
}
}
public void CreateSimpleAttribute()
{
// set up temp assembly.
var assembly = Utilities.CreateTempNetAssembly();
var typeSystem = assembly.NetDirectory.MetadataHeader.TypeSystem;
var tableStream = assembly.NetDirectory.MetadataHeader.GetStream<TableStream>();
var fieldTable = tableStream.GetTable<FieldDefinition>();
var attributeTable = tableStream.GetTable<CustomAttribute>();
var importer = new ReferenceImporter(tableStream);
// create field.
var field = new FieldDefinition("MyField", FieldAttributes.Public | FieldAttributes.Static,
new FieldSignature(typeSystem.String));
fieldTable.Add(field);
// create custom attribute.
var signature = new CustomAttributeSignature();
signature.FixedArguments.Add(new CustomAttributeArgument(typeSystem.String, new ElementSignature("Lorem ipsum dolor sit amet.")));
signature.FixedArguments.Add(new CustomAttributeArgument(typeSystem.Boolean, new ElementSignature(true)));
var attribute = new CustomAttribute(importer.ImportMethod(typeof(ObsoleteAttribute).GetConstructor(new Type[]
{
typeof(string),
typeof(bool)
})), signature);
field.CustomAttributes.Add(attribute);
attributeTable.Add(attribute);
// build and validate.
assembly = Utilities.RebuildNetAssembly(assembly);
tableStream = assembly.NetDirectory.MetadataHeader.GetStream<TableStream>();
fieldTable = tableStream.GetTable<FieldDefinition>();
field = fieldTable[0];
attributeTable = tableStream.GetTable<CustomAttribute>();
var newAttribute = attributeTable[0];
Assert.IsTrue(field.CustomAttributes.Contains(newAttribute));
Assert.AreEqual(attribute.Constructor.FullName, newAttribute.Constructor.FullName);
Assert.AreEqual(attribute.Signature.FixedArguments.Count, newAttribute.Signature.FixedArguments.Count);
for (int i = 0; i < attribute.Signature.FixedArguments.Count; i++)
Assert.AreEqual(attribute.Signature.FixedArguments[i].Elements[0].Value,
newAttribute.Signature.FixedArguments[i].Elements[0].Value);
}