/// <summary>
/// Decodes a type from within a signature from a BlobReader positioned immediately past the given SignatureTypeCode.
/// </summary>
/// <param name="blobReader">The blob reader.</param>
/// <param name="typeCode">The SignatureTypeCode that immediately preceded the reader's current position.</param>
/// <param name="provider">The type provider.</param>
/// <returns>The decoded type.</returns>
/// <exception cref="System.BadImageFormatException">The reader was not positioned at a valud signature type.</exception>
private static TType DecodeType <TType>(ref BlobReader blobReader, int typeCode, ISignatureTypeProvider <TType> provider)
{
TType elementType;
int index;
if (typeCode > byte.MaxValue)
{
typeCode = (int)SignatureTypeCode.Invalid;
}
switch (typeCode)
{
case (int)SignatureTypeCode.Boolean:
case (int)SignatureTypeCode.Char:
case (int)SignatureTypeCode.SByte:
case (int)SignatureTypeCode.Byte:
case (int)SignatureTypeCode.Int16:
case (int)SignatureTypeCode.UInt16:
case (int)SignatureTypeCode.Int32:
case (int)SignatureTypeCode.UInt32:
case (int)SignatureTypeCode.Int64:
case (int)SignatureTypeCode.UInt64:
case (int)SignatureTypeCode.Single:
case (int)SignatureTypeCode.Double:
case (int)SignatureTypeCode.IntPtr:
case (int)SignatureTypeCode.UIntPtr:
case (int)SignatureTypeCode.Object:
case (int)SignatureTypeCode.String:
case (int)SignatureTypeCode.Void:
case (int)SignatureTypeCode.TypedReference:
return(provider.GetPrimitiveType((PrimitiveTypeCode)typeCode));
case (int)SignatureTypeCode.Pointer:
elementType = DecodeType(ref blobReader, provider);
return(provider.GetPointerType(elementType));
case (int)SignatureTypeCode.ByReference:
elementType = DecodeType(ref blobReader, provider);
return(provider.GetByReferenceType(elementType));
case (int)SignatureTypeCode.Pinned:
elementType = DecodeType(ref blobReader, provider);
return(provider.GetPinnedType(elementType));
case (int)SignatureTypeCode.SZArray:
elementType = DecodeType(ref blobReader, provider);
return(provider.GetSZArrayType(elementType));
case (int)SignatureTypeCode.FunctionPointer:
MethodSignature <TType> methodSignature = DecodeMethodSignature(ref blobReader, provider);
return(provider.GetFunctionPointerType(methodSignature));
case (int)SignatureTypeCode.Array:
return(DecodeArrayType(ref blobReader, provider));
case (int)SignatureTypeCode.RequiredModifier:
return(DecodeModifiedType(ref blobReader, provider, isRequired: true));
case (int)SignatureTypeCode.OptionalModifier:
return(DecodeModifiedType(ref blobReader, provider, isRequired: false));
case (int)SignatureTypeCode.GenericTypeInstance:
return(DecodeGenericTypeInstance(ref blobReader, provider));
case (int)SignatureTypeCode.GenericTypeParameter:
index = blobReader.ReadCompressedInteger();
return(provider.GetGenericTypeParameter(index));
case (int)SignatureTypeCode.GenericMethodParameter:
index = blobReader.ReadCompressedInteger();
return(provider.GetGenericMethodParameter(index));
case 0x11: //(int)CorElementType.ELEMENT_TYPE_CLASS
return(DecodeTypeHandle(ref blobReader, provider, false));
case 0x12: //(int)CorElementType.ELEMENT_TYPE_VALUETYPE:
return(DecodeTypeHandle(ref blobReader, provider, true));
default:
throw new BadImageFormatException();
}
}
private TType DecodeType(ref BlobReader blobReader, bool allowTypeSpecifications, int typeCode)
{
TType elementType;
int index;
switch (typeCode)
{
case (int)SignatureTypeCode.Boolean:
case (int)SignatureTypeCode.Char:
case (int)SignatureTypeCode.SByte:
case (int)SignatureTypeCode.Byte:
case (int)SignatureTypeCode.Int16:
case (int)SignatureTypeCode.UInt16:
case (int)SignatureTypeCode.Int32:
case (int)SignatureTypeCode.UInt32:
case (int)SignatureTypeCode.Int64:
case (int)SignatureTypeCode.UInt64:
case (int)SignatureTypeCode.Single:
case (int)SignatureTypeCode.Double:
case (int)SignatureTypeCode.IntPtr:
case (int)SignatureTypeCode.UIntPtr:
case (int)SignatureTypeCode.Object:
case (int)SignatureTypeCode.String:
case (int)SignatureTypeCode.Void:
case (int)SignatureTypeCode.TypedReference:
return(_provider.GetPrimitiveType((PrimitiveTypeCode)typeCode));
case (int)SignatureTypeCode.Pointer:
elementType = DecodeType(ref blobReader);
return(_provider.GetPointerType(elementType));
case (int)SignatureTypeCode.ByReference:
elementType = DecodeType(ref blobReader);
return(_provider.GetByReferenceType(elementType));
case (int)SignatureTypeCode.Pinned:
elementType = DecodeType(ref blobReader);
return(_provider.GetPinnedType(elementType));
case (int)SignatureTypeCode.SZArray:
elementType = DecodeType(ref blobReader);
return(_provider.GetSZArrayType(elementType));
case (int)SignatureTypeCode.FunctionPointer:
MethodSignature <TType> methodSignature = DecodeMethodSignature(ref blobReader);
return(_provider.GetFunctionPointerType(methodSignature));
case (int)SignatureTypeCode.Array:
return(DecodeArrayType(ref blobReader));
case (int)SignatureTypeCode.RequiredModifier:
return(DecodeModifiedType(ref blobReader, isRequired: true));
case (int)SignatureTypeCode.OptionalModifier:
return(DecodeModifiedType(ref blobReader, isRequired: false));
case (int)SignatureTypeCode.GenericTypeInstance:
return(DecodeGenericTypeInstance(ref blobReader));
case (int)SignatureTypeCode.GenericTypeParameter:
index = blobReader.ReadCompressedInteger();
return(_provider.GetGenericTypeParameter(_genericContext, index));
case (int)SignatureTypeCode.GenericMethodParameter:
index = blobReader.ReadCompressedInteger();
return(_provider.GetGenericMethodParameter(_genericContext, index));
case (int)SignatureTypeKind.Class:
case (int)SignatureTypeKind.ValueType:
return(DecodeTypeHandle(ref blobReader, (byte)typeCode, allowTypeSpecifications));
default:
throw new BadImageFormatException(StarkPlatform.Reflection.Resources.SR.Format(SR.UnexpectedSignatureTypeCode, typeCode));
}
}
public RoType GetGenericTypeParameter(TypeContext genericContext, int index) => _typeProvider.GetGenericTypeParameter(genericContext, index);
