C# Reader.ModuleReader类代码示例

		internal ResourceModule(ModuleReader manifest, int index, string location)
			: base(manifest.universe)
		{
			this.manifest = manifest;
			this.index = index;
			this.location = location;
		}

		internal TypeDefImpl(ModuleReader module, int index)
		{
			this.module = module;
			this.index = index;
			this.typeName = module.GetString(module.TypeDef.records[index].TypeName);
			this.typeNamespace = module.GetString(module.TypeDef.records[index].TypeNamespace);
		}

 internal AssemblyReader(string location, ModuleReader manifestModule)
     : base(manifestModule.universe)
 {
     this.location = location;
     this.manifestModule = manifestModule;
     externalModules = new Module[manifestModule.File.records.Length];
 }

		internal static FieldSignature ReadSig(ModuleReader module, ByteReader br, IGenericContext context)
		{
			if (br.ReadByte() != FIELD)
			{
				throw new BadImageFormatException();
			}
			CustomModifiers mods = CustomModifiers.Read(module, br, context);
			Type fieldType = ReadType(module, br, context);
			return new FieldSignature(fieldType, mods);
		}

		internal ExceptionHandlingClause(ModuleReader module, int flags, int tryOffset, int tryLength, int handlerOffset, int handlerLength, int classTokenOrfilterOffset, IGenericContext context)
		{
			this.flags = flags;
			this.tryOffset = tryOffset;
			this.tryLength = tryLength;
			this.handlerOffset = handlerOffset;
			this.handlerLength = handlerLength;
			this.catchType = flags == (int)ExceptionHandlingClauseOptions.Clause && classTokenOrfilterOffset != 0 ? module.ResolveType(classTokenOrfilterOffset, context) : null;
			this.filterOffset = flags == (int)ExceptionHandlingClauseOptions.Filter ? classTokenOrfilterOffset : 0;
		}

		private static Type ReadGenericInst(ModuleReader module, ByteReader br, IGenericContext context)
		{
			Type type;
			switch (br.ReadByte())
			{
				case ELEMENT_TYPE_CLASS:
					type = ReadTypeDefOrRefEncoded(module, br, context).MarkNotValueType();
					break;
				case ELEMENT_TYPE_VALUETYPE:
					type = ReadTypeDefOrRefEncoded(module, br, context).MarkValueType();
					break;
				default:
					throw new BadImageFormatException();
			}
			if (!type.__IsMissing && !type.IsGenericTypeDefinition)
			{
				throw new BadImageFormatException();
			}
			int genArgCount = br.ReadCompressedInt();
			Type[] args = new Type[genArgCount];
			Type[][] reqmod = null;
			Type[][] optmod = null;
			for (int i = 0; i < genArgCount; i++)
			{
				// LAMESPEC the Type production (23.2.12) doesn't include CustomMod* for genericinst, but C++ uses it, the verifier allows it and ildasm also supports it
				CustomModifiers mods = ReadCustomModifiers(module, br, context);
				if (mods.required != null || mods.optional != null)
				{
					if (reqmod == null)
					{
						reqmod = new Type[genArgCount][];
						optmod = new Type[genArgCount][];
					}
					reqmod[i] = mods.required;
					optmod[i] = mods.optional;
				}
				args[i] = ReadType(module, br, context);
			}
			return GenericTypeInstance.Make(type, args, reqmod, optmod);
		}

		internal static Type ReadTypeDefOrRefEncoded(ModuleReader module, ByteReader br, IGenericContext context)
		{
			int encoded = br.ReadCompressedUInt();
			switch (encoded & 3)
			{
				case 0:
					return module.ResolveType((TypeDefTable.Index << 24) + (encoded >> 2), null, null);
				case 1:
					return module.ResolveType((TypeRefTable.Index << 24) + (encoded >> 2), null, null);
				case 2:
					return module.ResolveType((TypeSpecTable.Index << 24) + (encoded >> 2), context);
				default:
					throw new BadImageFormatException();
			}
		}

		private static Type ReadTypeOrByRef(ModuleReader module, ByteReader br, IGenericContext context)
		{
			if (br.PeekByte() == ELEMENT_TYPE_BYREF)
			{
				br.ReadByte();
				// LAMESPEC it is allowed (by C++/CLI, ilasm and peverify) to have custom modifiers after the BYREF
				// (which makes sense, as it is analogous to pointers)
				CustomModifiers mods = CustomModifiers.Read(module, br, context);
				// C++/CLI generates void& local variables, so we need to use ReadTypeOrVoid here
				return ReadTypeOrVoid(module, br, context).__MakeByRefType(mods);
			}
			else
			{
				return ReadType(module, br, context);
			}
		}

		protected static Type ReadParam(ModuleReader module, ByteReader br, IGenericContext context)
		{
			switch (br.PeekByte())
			{
				case ELEMENT_TYPE_TYPEDBYREF:
					br.ReadByte();
					return module.universe.System_TypedReference;
				default:
					return ReadTypeOrByRef(module, br, context);
			}
		}

		// see ECMA 335 CLI spec June 2006 section 23.2.12 for this production
		protected static Type ReadType(ModuleReader module, ByteReader br, IGenericContext context)
		{
			CustomModifiers mods;
			switch (br.ReadByte())
			{
				case ELEMENT_TYPE_CLASS:
					return ReadTypeDefOrRefEncoded(module, br, context).MarkNotValueType();
				case ELEMENT_TYPE_VALUETYPE:
					return ReadTypeDefOrRefEncoded(module, br, context).MarkValueType();
				case ELEMENT_TYPE_BOOLEAN:
					return module.universe.System_Boolean;
				case ELEMENT_TYPE_CHAR:
					return module.universe.System_Char;
				case ELEMENT_TYPE_I1:
					return module.universe.System_SByte;
				case ELEMENT_TYPE_U1:
					return module.universe.System_Byte;
				case ELEMENT_TYPE_I2:
					return module.universe.System_Int16;
				case ELEMENT_TYPE_U2:
					return module.universe.System_UInt16;
				case ELEMENT_TYPE_I4:
					return module.universe.System_Int32;
				case ELEMENT_TYPE_U4:
					return module.universe.System_UInt32;
				case ELEMENT_TYPE_I8:
					return module.universe.System_Int64;
				case ELEMENT_TYPE_U8:
					return module.universe.System_UInt64;
				case ELEMENT_TYPE_R4:
					return module.universe.System_Single;
				case ELEMENT_TYPE_R8:
					return module.universe.System_Double;
				case ELEMENT_TYPE_I:
					return module.universe.System_IntPtr;
				case ELEMENT_TYPE_U:
					return module.universe.System_UIntPtr;
				case ELEMENT_TYPE_STRING:
					return module.universe.System_String;
				case ELEMENT_TYPE_OBJECT:
					return module.universe.System_Object;
				case ELEMENT_TYPE_VAR:
					return context.GetGenericTypeArgument(br.ReadCompressedUInt());
				case ELEMENT_TYPE_MVAR:
					return context.GetGenericMethodArgument(br.ReadCompressedUInt());
				case ELEMENT_TYPE_GENERICINST:
					return ReadGenericInst(module, br, context);
				case ELEMENT_TYPE_SZARRAY:
					mods = CustomModifiers.Read(module, br, context);
					return ReadType(module, br, context).__MakeArrayType(mods);
				case ELEMENT_TYPE_ARRAY:
					mods = CustomModifiers.Read(module, br, context);
					return ReadType(module, br, context).__MakeArrayType(br.ReadCompressedUInt(), ReadArraySizes(br), ReadArrayBounds(br), mods);
				case ELEMENT_TYPE_PTR:
					mods = CustomModifiers.Read(module, br, context);
					return ReadTypeOrVoid(module, br, context).__MakePointerType(mods);
				case ELEMENT_TYPE_FNPTR:
					return ReadFunctionPointer(module, br, context);
				default:
					throw new BadImageFormatException();
			}
		}

		internal static void ReadLocalVarSig(ModuleReader module, ByteReader br, IGenericContext context, List<LocalVariableInfo> list)
		{
			if (br.Length < 2 || br.ReadByte() != LOCAL_SIG)
			{
				throw new BadImageFormatException("Invalid local variable signature");
			}
			int count = br.ReadCompressedUInt();
			for (int i = 0; i < count; i++)
			{
				if (br.PeekByte() == ELEMENT_TYPE_TYPEDBYREF)
				{
					br.ReadByte();
					list.Add(new LocalVariableInfo(i, module.universe.System_TypedReference, false, new CustomModifiers()));
				}
				else
				{
					CustomModifiers mods1 = CustomModifiers.Read(module, br, context);
					bool pinned = false;
					if (br.PeekByte() == ELEMENT_TYPE_PINNED)
					{
						br.ReadByte();
						pinned = true;
					}
					CustomModifiers mods2 = CustomModifiers.Read(module, br, context);
					Type type = ReadTypeOrByRef(module, br, context);
					list.Add(new LocalVariableInfo(i, type, pinned, CustomModifiers.Combine(mods1, mods2)));
				}
			}
		}

 private Module LoadModule(int index, byte[] rawModule, string location)
 {
     if ((manifestModule.File.records[index].Flags & ContainsNoMetaData) != 0)
     {
         return externalModules[index] = new ResourceModule(manifestModule, index, location);
     }
     else
     {
         if (rawModule == null)
         {
             rawModule = File.ReadAllBytes(location);
         }
         return externalModules[index] = new ModuleReader(this, manifestModule.universe, new MemoryStream(rawModule), location);
     }
 }

		private static CustomModifiers ReadCustomModifiers(ModuleReader module, ByteReader br, IGenericContext context)
		{
			CustomModifiers mods = new CustomModifiers();
			byte b = br.PeekByte();
			if (IsCustomModifier(b))
			{
				List<Type> required = new List<Type>();
				List<Type> optional = new List<Type>();
				while (IsCustomModifier(b))
				{
					bool req = br.ReadByte() == ELEMENT_TYPE_CMOD_REQD;
					Type type = ReadTypeDefOrRefEncoded(module, br, context);
					(req ? required : optional).Add(type);
					b = br.PeekByte();
				}
				mods.required = required.ToArray();
				mods.optional = optional.ToArray();
			}
			return mods;
		}

		public static AssemblyName GetAssemblyName(string path)
		{
			try
			{
				path = Path.GetFullPath(path);
				using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read))
				{
					ModuleReader module = new ModuleReader(null, null, fs, path, false);
					if (module.Assembly == null)
					{
						throw new BadImageFormatException("Module does not contain a manifest");
					}
					return module.Assembly.GetName();
				}
			}
			catch (IOException x)
			{
				throw new FileNotFoundException(x.Message, x);
			}
			catch (UnauthorizedAccessException x)
			{
				throw new FileNotFoundException(x.Message, x);
			}
		}

		internal static MethodSignature ReadSig(ModuleReader module, ByteReader br, IGenericContext context)
		{
			CallingConventions callingConvention;
			int genericParamCount;
			Type returnType;
			Type[] parameterTypes;
			byte flags = br.ReadByte();
			switch (flags & 7)
			{
				case DEFAULT:
					callingConvention = CallingConventions.Standard;
					break;
				case VARARG:
					callingConvention = CallingConventions.VarArgs;
					break;
				default:
					throw new BadImageFormatException();
			}
			if ((flags & HASTHIS) != 0)
			{
				callingConvention |= CallingConventions.HasThis;
			}
			if ((flags & EXPLICITTHIS) != 0)
			{
				callingConvention |= CallingConventions.ExplicitThis;
			}
			genericParamCount = 0;
			if ((flags & GENERIC) != 0)
			{
				genericParamCount = br.ReadCompressedInt();
				context = new UnboundGenericMethodContext(context);
			}
			int paramCount = br.ReadCompressedInt();
			Type[][][] modifiers = null;
			Type[] optionalCustomModifiers;
			Type[] requiredCustomModifiers;
			ReadCustomModifiers(module, br, context, out requiredCustomModifiers, out optionalCustomModifiers);
			returnType = ReadRetType(module, br, context);
			parameterTypes = new Type[paramCount];
			PackedCustomModifiers.SetModifiers(ref modifiers, 0, 0, optionalCustomModifiers, paramCount + 1);
			PackedCustomModifiers.SetModifiers(ref modifiers, 0, 1, requiredCustomModifiers, paramCount + 1);
			for (int i = 0; i < parameterTypes.Length; i++)
			{
				if ((callingConvention & CallingConventions.VarArgs) != 0 && br.PeekByte() == SENTINEL)
				{
					Array.Resize(ref parameterTypes, i);
					if (modifiers != null)
					{
						Array.Resize(ref modifiers, i + 1);
					}
					break;
				}
				ReadCustomModifiers(module, br, context, out requiredCustomModifiers, out optionalCustomModifiers);
				PackedCustomModifiers.SetModifiers(ref modifiers, i + 1, 0, optionalCustomModifiers, paramCount + 1);
				PackedCustomModifiers.SetModifiers(ref modifiers, i + 1, 1, requiredCustomModifiers, paramCount + 1);
				parameterTypes[i] = ReadParam(module, br, context);
			}
			return new MethodSignature(returnType, parameterTypes, modifiers, callingConvention, genericParamCount);
		}