721 lines
29 KiB
C#
721 lines
29 KiB
C#
//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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using System;
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namespace Bartok.MSIL
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{
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using System.IO;
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public class MetaDataCustomAttribute: MetaDataObject {
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// Constructor Methods
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internal MetaDataCustomAttribute(int parentIndex,
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MetaDataObject type,
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byte[] buffer) {
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this.parentIndex = parentIndex;
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this.type = type;
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this.buffer = buffer;
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}
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// This is technically not a constructor method, but it is meant to
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// be used to set up the object
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internal void resolveReferences(MetaDataLoader loader) {
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this.parent = loader.getHasCustomAttribute(this.parentIndex);
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this.parent.AddCustomAttribute(this);
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}
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// Resolve all the custom attributes found in the assemblies registered
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// in 'resolver', using all the type information found in 'resolver' and
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// 'resolvers'.
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internal void resolveReferences(MetaDataResolver resolver,
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MetaDataResolver[] resolvers)
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{
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if (this.buffer[0] != 0x01 || this.buffer[1] != 0x00) {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Custom Attribute doesn't start with 0x0001!");
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}
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SignatureMethod signature;
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if (this.type is MetaDataMethod) {
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MetaDataMethod method = (MetaDataMethod) this.type;
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signature = (SignatureMethod) method.Signature;
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if (!method.Name.Equals(".ctor")) {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Custom attribute with unexpected method name: "+method.Name);
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}
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this.typeDefOrRef = method.Parent;
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this.name = method.Parent.FullName;
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}
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else if (this.type is MetaDataMemberRef) {
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MetaDataMemberRef memberRef = (MetaDataMemberRef) this.type;
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signature = (SignatureMethod) memberRef.Signature;
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if (!memberRef.Name.Equals(".ctor")) {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Custom attribute with unexpected memberRef name: "+memberRef.Name);
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}
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MetaDataObject methodParent = memberRef.Class;
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this.typeDefOrRef = methodParent;
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if (methodParent is MetaDataTypeDefinition) {
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this.name = ((MetaDataTypeDefinition) methodParent).FullName;
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}
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else if (methodParent is MetaDataTypeReference) {
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this.name = ((MetaDataTypeReference) methodParent).FullName;
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}
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else {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Custom attribute with unexpected class type: "+methodParent);
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}
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}
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else {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Custom attribute with unexpected type: "+this.type);
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}
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Signature.Param[] parameters = signature.Parameters;
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int fixedCount = parameters.Length;
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this.fixedArgs = new Object[fixedCount];
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MemoryStream stream =
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new MemoryStream(this.buffer, 2, this.buffer.Length - 2, false);
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BinaryReader reader = new BinaryReader(stream);
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for (int i = 0; i < fixedCount; i++) {
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Signature.Param parameter = parameters[i];
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Signature.Type paramType = parameter.Type;
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Object value =
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ExtractParameter(paramType, reader, resolver, resolvers);
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fixedArgs[i] = value;
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}
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short namedCount = ((reader.PeekChar() == -1) ?
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(short) 0 :
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reader.ReadInt16());
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if (namedCount > this.buffer.Length &&
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this.Name.Equals("System.Runtime.CompilerServices.RequiredAttributeAttribute")) {
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// Some CLR libraries have been compiled against a version of
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// mscorlib that had a fixed parameter to RequiredAttribute.
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// Simply ignore whatever the parameter was!
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namedCount = 0;
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}
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this.namedArgs = new NamedArg[namedCount];
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for (int i = 0; i < namedCount; i++) {
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SerializationTypes propOrField = (SerializationTypes)
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reader.ReadByte();
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ElementTypes fieldType = (ElementTypes) reader.ReadByte();
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ElementTypes arrayType = ElementTypes.END;
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switch (fieldType) {
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case ElementTypes.SZARRAY: {
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arrayType = (ElementTypes) reader.ReadByte();
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if (arrayType == (ElementTypes) SerializationTypes.ENUM) {
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throw new Exception("Not implemented: Array of ENUM "+
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"for named field/property");
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}
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break;
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}
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case (ElementTypes) SerializationTypes.ENUM: {
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String enumName = ExtractString(reader);
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if (enumName.Length == 0) {
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throw new Exception("Empty enum name");
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}
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// Hope it is a 4-byte enum
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fieldType = (ElementTypes) SerializationTypes.U4;
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break;
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}
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case (ElementTypes) SerializationTypes.TAGGED_OBJECT: {
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throw new Exception("Not implemented: "+fieldType+
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" for named field/property");
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}
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default: {
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break;
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}
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}
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String name = ExtractString(reader);
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Object value;
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if (fieldType == ElementTypes.SZARRAY) {
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value = ExtractArrayValue(arrayType, reader);
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}
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else {
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value = ExtractValue(fieldType, reader);
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}
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if (propOrField == SerializationTypes.FIELD ||
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propOrField == SerializationTypes.PROPERTY) {
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this.namedArgs[i] =
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new NamedArg(propOrField == SerializationTypes.FIELD,
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-1, name, value);
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}
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else {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Unknown prop-or-field type: "+propOrField);
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}
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}
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}
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private static MetaDataObject ResolveTypeRef(MetaDataResolver resolver,
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MetaDataResolver[] resolvers,
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MetaDataTypeReference typeRef) {
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MetaDataObject result = resolver.ResolveTypeRef(typeRef);
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int i = 0;
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while (result == null && i < resolvers.Length) {
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MetaDataResolver testResolver = resolvers[i];
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i++;
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if (testResolver != resolver) {
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result = testResolver.ResolveTypeRef(typeRef);
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}
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}
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return result;
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}
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private static MetaDataTypeDefinition ResolveName(MetaDataResolver resolver,
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MetaDataResolver[] resolvers,
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String typeName) {
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MetaDataTypeDefinition typeDef = resolver.ResolveName(typeName);
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int i = 0;
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while (typeDef == null && i < resolvers.Length) {
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MetaDataResolver testResolver = resolvers[i];
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i++;
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if (testResolver != resolver) {
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typeDef = testResolver.ResolveName(typeName);
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}
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}
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return typeDef;
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}
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private static Object ExtractParameter(Signature.Type type,
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BinaryReader reader,
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MetaDataResolver resolver,
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MetaDataResolver[] resolvers)
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{
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switch (type.ElementType) {
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case ElementTypes.VALUETYPE: {
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MetaDataObject classObject = type.ClassObject;
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if (classObject is MetaDataTypeReference) {
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MetaDataTypeReference classReference =
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(MetaDataTypeReference) classObject;
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MetaDataObject resolvedObject =
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ResolveTypeRef(resolver, resolvers, classReference);
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if (resolvedObject is MetaDataTypeDefinition) {
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classObject = resolvedObject;
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}
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}
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if (classObject is MetaDataTypeReference) {
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// We will simply assume it is an I4 enum
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Console.Out.WriteLine("====>>> WARNING: Making I4 enum assumption for "+classObject);
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return reader.ReadInt32();
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}
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else if (classObject is MetaDataTypeDefinition) {
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MetaDataTypeDefinition classDef =
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(MetaDataTypeDefinition) classObject;
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MetaDataObject superClass = classDef.Extends;
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String superName;
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if (superClass is MetaDataTypeDefinition) {
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superName =
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((MetaDataTypeDefinition) superClass).FullName;
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}
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else if (superClass is MetaDataTypeReference) {
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superName =
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((MetaDataTypeReference) superClass).FullName;
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}
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else {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Unexpected superclass of valuetype: "+superClass);
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}
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if (!superName.Equals("System.Enum")) {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Found valuetype that wasn't an Enum");
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}
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return ExtractEnumValue(classDef, reader,
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resolver, resolvers);
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}
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else {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Unexpected valuetype class: "+classObject);
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}
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}
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case ElementTypes.CLASS: {
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MetaDataObject classObject = type.ClassObject;
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if (classObject is MetaDataTypeReference) {
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MetaDataTypeReference classReference =
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(MetaDataTypeReference) classObject;
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MetaDataObject resolvedObject =
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ResolveTypeRef(resolver, resolvers, classReference);
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if (resolvedObject is MetaDataTypeDefinition) {
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classObject = resolvedObject;
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}
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}
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String className;
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if (classObject is MetaDataTypeReference) {
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className =
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((MetaDataTypeReference) classObject).FullName;
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}
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else if (classObject is MetaDataTypeDefinition) {
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className =
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((MetaDataTypeDefinition) classObject).FullName;
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}
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else {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Unexpected class: "+classObject);
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}
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if (className.Equals("System.String")) {
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return ExtractString(reader);
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}
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else if (className.Equals("System.Object")) {
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goto case ElementTypes.OBJECT;
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}
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else if (className.Equals("System.Type")) {
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return ExtractString(reader);
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}
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if (!(classObject is MetaDataTypeDefinition)) {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Cannot determine whether the following is an array: "+classObject);
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}
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MetaDataObject superClass =
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((MetaDataTypeDefinition) classObject).Extends;
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Console.WriteLine("class is "+classObject);
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throw new Exception("Not implemented: object encoding an array");
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}
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case ElementTypes.OBJECT:
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case (ElementTypes) SerializationTypes.TAGGED_OBJECT: {
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SerializationTypes objectType = (SerializationTypes)
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reader.ReadByte();
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switch (objectType) {
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case SerializationTypes.ENUM: {
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String typeName = ExtractString(reader);
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// Some Stringified type names include a bunch of
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// information past the type, none of which we
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// are concerned about for the moment.
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int nameEnd = typeName.IndexOf(',');
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if (nameEnd >= 0) {
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typeName = typeName.Substring(0, nameEnd);
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}
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// A type defined within another type has a "+"
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// as the separator. Convert it to ".", which is
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// the convention the rest of the reader uses.
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typeName = typeName.Replace('+','.');
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MetaDataTypeDefinition typeDef =
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ResolveName(resolver, resolvers, typeName);
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if (typeDef == null) {
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throw new Exception("No typedef for "+typeName);
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}
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return ExtractEnumValue(typeDef, reader,
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resolver, resolvers);
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}
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case SerializationTypes.TYPE: {
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return ExtractValue((ElementTypes) objectType,
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reader);
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}
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default: {
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throw new Exception("Found OBJECT type with type "+objectType);
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}
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}
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}
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case ElementTypes.SZARRAY: {
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return ExtractArrayValue(type.TypeObject, reader,
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resolver, resolvers);
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}
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default: {
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return ExtractValue(type.ElementType, reader);
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}
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}
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}
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private static Object ExtractValue(ElementTypes type,
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BinaryReader reader)
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{
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switch (type) {
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case ElementTypes.BOOLEAN:
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return reader.ReadBoolean();
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case ElementTypes.CHAR:
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return (char) reader.ReadUInt16();
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case ElementTypes.I1:
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return reader.ReadSByte();
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case ElementTypes.U1:
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return reader.ReadByte();
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case ElementTypes.I2:
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return reader.ReadInt16();
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case ElementTypes.U2:
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return reader.ReadUInt16();
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case ElementTypes.I4:
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return reader.ReadInt32();
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case ElementTypes.U4:
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return reader.ReadUInt32();
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case ElementTypes.I8:
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return reader.ReadInt64();
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case ElementTypes.U8:
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return reader.ReadUInt64();
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case ElementTypes.R4:
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return reader.ReadSingle();
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case ElementTypes.R8:
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return reader.ReadDouble();
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case ElementTypes.STRING:
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case (ElementTypes) SerializationTypes.TYPE:
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return ExtractString(reader);
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default:
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throw new MetaDataLoader.IllegalMetaDataFormatException("Found unexpected type "+type+" in custom attribute parameter");
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}
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}
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private static String ExtractString(BinaryReader reader) {
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byte firstByte = reader.ReadByte();
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if (firstByte == 0xFF) {
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return null;
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}
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int size;
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if ((firstByte & 0x80) == 0) {
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// encoded in a single byte
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size = firstByte;
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}
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else if ((firstByte & 0x40) == 0) {
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// encoded in two bytes
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size = unchecked(((firstByte & 0x3F) << 8) |
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reader.ReadByte());
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}
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else {
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// encoded in four bytes
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size = unchecked((int) (((firstByte & 0x3F) << 24) |
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(reader.ReadByte() << 16) |
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(reader.ReadByte() << 8) |
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(reader.ReadByte())));
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}
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byte[] bytes = reader.ReadBytes(size);
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if (bytes.Length != size) {
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throw new Exception("Didn't get the bytes requested");
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}
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return (new System.Text.UTF8Encoding()).GetString(bytes);
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}
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private static Object ExtractEnumValue(MetaDataTypeDefinition typeDef,
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BinaryReader reader,
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MetaDataResolver resolver,
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MetaDataResolver[] resolvers)
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{
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MetaDataField[] classFields = typeDef.Fields;
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for (int i = 0; i < classFields.Length; i++) {
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if ((classFields[i].Flags & (int) MetaDataField.FieldAttributes.Static) == 0) {
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if (!classFields[i].Name.Equals("value__")) {
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throw new MetaDataLoader.IllegalMetaDataFormatException("Found enum with non-static field "+classFields[i].Name);
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}
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return ExtractParameter(classFields[i].Signature.FieldType,
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reader, resolver, resolvers);
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}
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}
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throw new MetaDataLoader.IllegalMetaDataFormatException("Found enum without non-static field");
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}
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private static Object ExtractArrayValue(Signature.Type type,
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BinaryReader reader,
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MetaDataResolver resolver,
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MetaDataResolver[] resolvers)
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{
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int arraySize = reader.ReadInt32();
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if (arraySize >= 0) {
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ElementTypes elementType = type.ElementType;
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if (elementType == ElementTypes.CLASS) {
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Object[] array = new Object[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = ExtractParameter(type, reader,
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resolver, resolvers);
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}
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return array;
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}
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else {
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return ExtractArrayValue(elementType, arraySize, reader);
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}
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}
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else {
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throw new Exception("Not implemented: custom attribute class "+
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"array with negative length");
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}
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}
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private static Object ExtractArrayValue(ElementTypes elementType,
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BinaryReader reader)
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{
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int arraySize = reader.ReadInt32();
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if (arraySize >= 0) {
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return ExtractArrayValue(elementType, arraySize, reader);
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}
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else {
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throw new Exception("Not implemented: custom atribute array "+
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"with negative length");
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}
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}
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private static Object ExtractArrayValue(ElementTypes elementType,
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int arraySize,
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BinaryReader reader)
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{
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switch (elementType) {
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case ElementTypes.BOOLEAN: {
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bool[] array = new bool[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadBoolean();
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}
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return array;
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}
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case ElementTypes.CHAR: {
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char[] array = new char[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = (char) reader.ReadUInt16();
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}
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return array;
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}
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case ElementTypes.I1: {
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sbyte[] array = new sbyte[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadSByte();
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}
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return array;
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}
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case ElementTypes.U1: {
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byte[] array = new byte[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadByte();
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}
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return array;
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}
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case ElementTypes.I2: {
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short[] array = new short[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadInt16();
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}
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return array;
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}
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case ElementTypes.U2: {
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ushort[] array = new ushort[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadUInt16();
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}
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return array;
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}
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case ElementTypes.I4: {
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int[] array = new int[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadInt32();
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}
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return array;
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}
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case ElementTypes.U4: {
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uint[] array = new uint[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadUInt32();
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}
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return array;
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}
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case ElementTypes.I8: {
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long[] array = new long[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadInt64();
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}
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return array;
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}
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case ElementTypes.U8: {
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ulong[] array = new ulong[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadUInt64();
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}
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return array;
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}
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case ElementTypes.R4: {
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float[] array = new float[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadSingle();
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}
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return array;
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}
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case ElementTypes.R8: {
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double[] array = new double[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = reader.ReadDouble();
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}
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return array;
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}
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case ElementTypes.STRING: {
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String[] array = new String[arraySize];
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for (int i = 0; i < arraySize; i++) {
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array[i] = ExtractString(reader);
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}
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return array;
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}
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default:
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throw new Exception("Not implemented: custom attribute "+
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"array of type "+elementType);
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}
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}
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// Access Methods
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|
|
// Who owns this custom attribute
|
|
public MetaDataObject Parent {
|
|
get { return this.parent; }
|
|
}
|
|
|
|
// The fully qualified name of the custom attribute
|
|
public String Name {
|
|
get { return this.name; }
|
|
}
|
|
|
|
// The type definition or reference of the custom attribute
|
|
public MetaDataObject TypeDefOrRef {
|
|
get { return this.typeDefOrRef; }
|
|
}
|
|
|
|
// The constructor method or memberref of the custom attribute
|
|
public MetaDataObject Type {
|
|
get { return this.type; }
|
|
}
|
|
|
|
// The array of arguments to the custom attribute constructor
|
|
public Object[] FixedArgs {
|
|
get { return this.fixedArgs; }
|
|
}
|
|
|
|
// The array of custom attribute fields and properties explicitly set
|
|
public NamedArg[] NamedArgs {
|
|
get { return this.namedArgs; }
|
|
}
|
|
|
|
// Debug Methods
|
|
|
|
public override String ToString() {
|
|
return ("MetaDataCustomAttribute("+
|
|
this.type+","+this.fixedArgs+","+this.namedArgs+","+
|
|
this.parentIndex+
|
|
(this.parent==null?"":("<"+this.parent.ToString()+">"))+
|
|
")["+new MetaDataBlob(this.buffer)+"]");
|
|
}
|
|
|
|
public override String ToStringLong() {
|
|
System.Text.StringBuilder sb =
|
|
new System.Text.StringBuilder("MetaDataCustomAttribute(");
|
|
sb.Append(this.type);
|
|
sb.Append(",");
|
|
if (this.fixedArgs != null) {
|
|
sb.Append("FixedArgs(");
|
|
for (int i = 0; i < this.fixedArgs.Length; i++) {
|
|
sb.Append(this.fixedArgs[i]);
|
|
sb.Append(",");
|
|
}
|
|
sb.Append("),");
|
|
}
|
|
else {
|
|
sb.Append("FixedArgs(),");
|
|
}
|
|
if (this.namedArgs != null) {
|
|
sb.Append("NamedArgs(");
|
|
for (int i = 0; i < this.namedArgs.Length; i++) {
|
|
sb.Append(this.namedArgs[i]);
|
|
sb.Append(",");
|
|
}
|
|
sb.Append("),");
|
|
}
|
|
else {
|
|
sb.Append("NamedArgs(),");
|
|
}
|
|
sb.Append(this.parent);
|
|
sb.Append("(");
|
|
sb.Append(this.parentIndex);
|
|
sb.Append("))[");
|
|
sb.Append(new MetaDataBlob(this.buffer));
|
|
sb.Append("]");
|
|
return sb.ToString();
|
|
}
|
|
|
|
// State
|
|
|
|
private readonly byte[] buffer;
|
|
private readonly int parentIndex;
|
|
private String name;
|
|
private MetaDataObject parent;
|
|
private MetaDataObject type;
|
|
private MetaDataObject typeDefOrRef;
|
|
private Object[] fixedArgs;
|
|
private NamedArg[] namedArgs;
|
|
|
|
public class FixedArg {
|
|
|
|
// A negative value for arrayDim signifies a nonArray
|
|
internal FixedArg(SerializationTypes type, int arrayDim,
|
|
Object value) {
|
|
this.arrayDim = arrayDim;
|
|
this.type = type;
|
|
this.value = value;
|
|
}
|
|
|
|
public bool IsArray {
|
|
get { return this.arrayDim >= 0; }
|
|
}
|
|
|
|
public int ArrayDim {
|
|
get {
|
|
if (this.arrayDim < 0) {
|
|
throw new Exception("FixedArg is not an array");
|
|
}
|
|
return this.arrayDim;
|
|
}
|
|
}
|
|
|
|
public SerializationTypes Type {
|
|
get { return this.type; }
|
|
}
|
|
|
|
public Object Value {
|
|
get { return this.value; }
|
|
}
|
|
|
|
public override String ToString() {
|
|
return ("FixedArg("+this.type+((arrayDim<0)?"":("["+arrayDim+"]"))+"->"+this.value+")");
|
|
}
|
|
|
|
private int arrayDim;
|
|
private SerializationTypes type;
|
|
private Object value;
|
|
|
|
}
|
|
|
|
public class NamedArg {
|
|
|
|
internal NamedArg(bool isFieldArg, int arrayDim,
|
|
String name, Object value)
|
|
{
|
|
this.isFieldArg = isFieldArg;
|
|
this.arrayDim = arrayDim;
|
|
this.type = type;
|
|
this.name = name;
|
|
this.value = value;
|
|
}
|
|
|
|
public bool IsFieldArg {
|
|
get { return this.isFieldArg; }
|
|
}
|
|
|
|
public bool IsArray {
|
|
get { return this.arrayDim >= 0; }
|
|
}
|
|
|
|
public int ArrayDim {
|
|
get {
|
|
if (this.arrayDim < 0) {
|
|
throw new Exception("NamedArg is not an array");
|
|
}
|
|
return this.arrayDim;
|
|
}
|
|
}
|
|
|
|
public SerializationTypes Type {
|
|
get { return this.type; }
|
|
}
|
|
|
|
public String Name {
|
|
get { return this.name; }
|
|
}
|
|
|
|
public Object Value {
|
|
get { return this.value; }
|
|
}
|
|
|
|
public override String ToString() {
|
|
return ("NamedArg("+this.name+":"+this.type+((arrayDim<0)?"":("["+arrayDim+"]"))+"->"+this.value+")");
|
|
}
|
|
|
|
private bool isFieldArg;
|
|
private int arrayDim;
|
|
private String name;
|
|
private SerializationTypes type;
|
|
private Object value;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|