C# ByteReader.ReadByte方法代码示例

		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);
		}

		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 __StandAloneMethodSig ReadStandAloneMethodSig(ModuleReader module, ByteReader br, IGenericContext context)
		{
			CallingConventions callingConvention = 0;
			System.Runtime.InteropServices.CallingConvention unmanagedCallingConvention = 0;
			bool unmanaged;
			byte flags = br.ReadByte();
			switch (flags & 7)
			{
				case DEFAULT:
					callingConvention = CallingConventions.Standard;
					unmanaged = false;
					break;
				case 0x01:	// C
					unmanagedCallingConvention = System.Runtime.InteropServices.CallingConvention.Cdecl;
					unmanaged = true;
					break;
				case 0x02:	// STDCALL
					unmanagedCallingConvention = System.Runtime.InteropServices.CallingConvention.StdCall;
					unmanaged = true;
					break;
				case 0x03:	// THISCALL
					unmanagedCallingConvention = System.Runtime.InteropServices.CallingConvention.ThisCall;
					unmanaged = true;
					break;
				case 0x04:	// FASTCALL
					unmanagedCallingConvention = System.Runtime.InteropServices.CallingConvention.FastCall;
					unmanaged = true;
					break;
				case VARARG:
					callingConvention = CallingConventions.VarArgs;
					unmanaged = false;
					break;
				default:
					throw new BadImageFormatException();
			}
			if ((flags & HASTHIS) != 0)
			{
				callingConvention |= CallingConventions.HasThis;
			}
			if ((flags & EXPLICITTHIS) != 0)
			{
				callingConvention |= CallingConventions.ExplicitThis;
			}
			if ((flags & GENERIC) != 0)
			{
				throw new BadImageFormatException();
			}
			int paramCount = br.ReadCompressedInt();
			SkipCustomModifiers(br);
			Type returnType = ReadRetType(module, br, context);
			List<Type> parameterTypes = new List<Type>();
			List<Type> optionalParameterTypes = new List<Type>();
			List<Type> curr = parameterTypes;
			for (int i = 0; i < paramCount; i++)
			{
				if (br.PeekByte() == SENTINEL)
				{
					br.ReadByte();
					curr = optionalParameterTypes;
				}
				SkipCustomModifiers(br);
				curr.Add(ReadParam(module, br, context));
			}
			return new __StandAloneMethodSig(unmanaged, unmanagedCallingConvention, callingConvention, returnType, parameterTypes.ToArray(), optionalParameterTypes.ToArray());
		}

 void ReadFixedArg(StringBuilder sb, ByteReader br, Type type, bool arrayElement = false)
 {
     if (type.IsArray)
     {
         int length = br.ReadInt32();
         if (length == -1 && compat == CompatLevel.None)
         {
             sb.Append("nullref");
         }
         else if (length == 0 && compat != CompatLevel.None)
         {
             throw new IKVM.Reflection.BadImageFormatException();
         }
         else
         {
             Type elementType = type.GetElementType();
             AppendCATypeName(sb, elementType, null);
             sb.AppendFormat("[{0}](", length);
             for (int i = 0; i < length; i++)
             {
                 if (i != 0)
                 {
                     sb.Append(' ');
                 }
                 if (elementType == typeofSystemObject)
                 {
                     string typeName;
                     ReadFixedArg(sb, br, ReadFieldOrPropType(sb, br, out typeName), false);
                 }
                 else
                 {
                     ReadFixedArg(sb, br, elementType, true);
                 }
             }
             sb.Append(')');
         }
     }
     else if (type.FullName == "System.Type" && type.Assembly.GetName().Name == "mscorlib")
     {
         if (!arrayElement)
         {
             AppendCATypeName(sb, type, null);
             sb.Append('(');
         }
         string typeName;
         var type1 = ReadType(br, out typeName);
         if (type1 == null)
         {
             if (typeName == null)
             {
                 sb.Append("nullref");
             }
             else
             {
                 sb.Append("class ").Append(QuoteIdentifier(typeName, true));
             }
         }
         else
         {
             AppendTypeName(sb, type1, typeName, compat != CompatLevel.None && IsNestedTypeWithNamespace(type1));
         }
         if (!arrayElement)
         {
             sb.Append(')');
         }
     }
     else if (type.Assembly == mscorlib)
     {
         if (!arrayElement)
         {
             AppendCATypeName(sb, type, null);
             sb.Append('(');
         }
         if (type == typeofSystemBoolean)
         {
             sb.Append(br.ReadByte() == 0 ? "false" : "true");
         }
         else if (type == typeofSystemByte)
         {
             sb.Append(br.ReadByte());
         }
         else if (type == typeofSystemSByte)
         {
             sb.Append(br.ReadSByte());
         }
         else if (type == typeofSystemChar)
         {
             sb.AppendFormat("0x{0:X4}", (int)br.ReadChar());
         }
         else if (type == typeofSystemInt16)
         {
             sb.Append(br.ReadInt16());
         }
         else if (type == typeofSystemUInt16)
         {
             sb.Append(br.ReadUInt16());
         }
         else if (type == typeofSystemInt32)
         {
             sb.Append(br.ReadInt32());
//.........这里部分代码省略.........

		// this reads just the optional parameter types, from a MethodRefSig
		internal static Type[] ReadOptionalParameterTypes(ModuleReader module, ByteReader br, IGenericContext context, out CustomModifiers[] customModifiers)
		{
			br.ReadByte();
			int paramCount = br.ReadCompressedUInt();
			CustomModifiers.Skip(br);
			ReadRetType(module, br, context);
			for (int i = 0; i < paramCount; i++)
			{
				if (br.PeekByte() == SENTINEL)
				{
					br.ReadByte();
					Type[] types = new Type[paramCount - i];
					customModifiers = new CustomModifiers[types.Length];
					for (int j = 0; j < types.Length; j++)
					{
						customModifiers[j] = CustomModifiers.Read(module, br, context);
						types[j] = ReadType(module, br, context);
					}
					return types;
				}
				CustomModifiers.Skip(br);
				ReadType(module, br, context);
			}
			customModifiers = Empty<CustomModifiers>.Array;
			return Type.EmptyTypes;
		}

		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);
			}
		}

		// 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 Type[] ReadMethodSpec(ModuleReader module, ByteReader br, IGenericContext context)
		{
			if (br.ReadByte() != GENERICINST)
			{
				throw new BadImageFormatException();
			}
			Type[] args = new Type[br.ReadCompressedUInt()];
			for (int i = 0; i < args.Length; i++)
			{
				CustomModifiers.Skip(br);
				args[i] = ReadType(module, br, context);
			}
			return args;
		}

		internal static void ReadDeclarativeSecurity(Assembly asm, List<CustomAttributeData> list, int action, ByteReader br)
		{
			Universe u = asm.universe;
			if (br.PeekByte() == '.')
			{
				br.ReadByte();
				int count = br.ReadCompressedInt();
				for (int j = 0; j < count; j++)
				{
					Type type = ReadType(asm, br);
					ConstructorInfo constructor;
					if (type == u.System_Security_Permissions_HostProtectionAttribute && action == (int)System.Security.Permissions.SecurityAction.LinkDemand)
					{
						constructor = type.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, Type.EmptyTypes, null);
					}
					else
					{
						constructor = type.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, new Type[] { u.System_Security_Permissions_SecurityAction }, null);
					}
					// LAMESPEC there is an additional length here (probably of the named argument list)
					ByteReader slice = br.Slice(br.ReadCompressedInt());
					// LAMESPEC the count of named arguments is a compressed integer (instead of UInt16 as NumNamed in custom attributes)
					list.Add(new CustomAttributeData(constructor, action, ReadNamedArguments(asm, slice, slice.ReadCompressedInt(), type)));
				}
			}
			else
			{
				// .NET 1.x format (xml)
				char[] buf = new char[br.Length / 2];
				for (int i = 0; i < buf.Length; i++)
				{
					buf[i] = br.ReadChar();
				}
				string xml = new String(buf);
				ConstructorInfo constructor = u.System_Security_Permissions_PermissionSetAttribute.GetConstructor(new Type[] { u.System_Security_Permissions_SecurityAction });
				List<CustomAttributeNamedArgument> args = new List<CustomAttributeNamedArgument>();
				args.Add(new CustomAttributeNamedArgument(u.System_Security_Permissions_PermissionSetAttribute.GetProperty("XML"),
					new CustomAttributeTypedArgument(u.System_String, xml)));
				list.Add(new CustomAttributeData(constructor, action, args));
			}
		}

		internal static PropertySignature ReadSig(ModuleReader module, ByteReader br, IGenericContext context)
		{
			byte flags = br.ReadByte();
			if ((flags & PROPERTY) == 0)
			{
				throw new BadImageFormatException();
			}
			CallingConventions callingConvention = CallingConventions.Standard;
			if ((flags & HASTHIS) != 0)
			{
				callingConvention |= CallingConventions.HasThis;
			}
			if ((flags & EXPLICITTHIS) != 0)
			{
				callingConvention |= CallingConventions.ExplicitThis;
			}
			Type returnType;
			Type[] parameterTypes;
			int paramCount = br.ReadCompressedInt();
			CustomModifiers[] mods = null;
			PackedCustomModifiers.Pack(ref mods, 0, CustomModifiers.Read(module, br, context), paramCount + 1);
			returnType = ReadRetType(module, br, context);
			parameterTypes = new Type[paramCount];
			for (int i = 0; i < parameterTypes.Length; i++)
			{
				PackedCustomModifiers.Pack(ref mods, i + 1, CustomModifiers.Read(module, br, context), paramCount + 1);
				parameterTypes[i] = ReadParam(module, br, context);
			}
			return new PropertySignature(callingConvention, returnType, parameterTypes, PackedCustomModifiers.Wrap(mods));
		}

		internal static PropertySignature ReadSig(ModuleReader module, ByteReader br, IGenericContext context)
		{
			byte flags = br.ReadByte();
			if ((flags & PROPERTY) == 0)
			{
				throw new BadImageFormatException();
			}
			CallingConventions callingConvention = CallingConventions.Standard;
			if ((flags & HASTHIS) != 0)
			{
				callingConvention |= CallingConventions.HasThis;
			}
			if ((flags & EXPLICITTHIS) != 0)
			{
				callingConvention |= CallingConventions.ExplicitThis;
			}
			Type returnType;
			Type[] returnTypeRequiredCustomModifiers;
			Type[] returnTypeOptionalCustomModifiers;
			Type[] parameterTypes;
			Type[][] parameterRequiredCustomModifiers;
			Type[][] parameterOptionalCustomModifiers;
			int paramCount = br.ReadCompressedInt();
			ReadCustomModifiers(module, br, context, out returnTypeRequiredCustomModifiers, out returnTypeOptionalCustomModifiers);
			returnType = ReadRetType(module, br, context);
			parameterTypes = new Type[paramCount];
			parameterRequiredCustomModifiers = null;
			parameterOptionalCustomModifiers = null;
			for (int i = 0; i < parameterTypes.Length; i++)
			{
				if (IsCustomModifier(br.PeekByte()))
				{
					if (parameterOptionalCustomModifiers == null)
					{
						parameterOptionalCustomModifiers = new Type[parameterTypes.Length][];
						parameterRequiredCustomModifiers = new Type[parameterTypes.Length][];
					}
					ReadCustomModifiers(module, br, context, out parameterRequiredCustomModifiers[i], out parameterOptionalCustomModifiers[i]);
				}
				parameterTypes[i] = ReadParam(module, br, context);
			}
			return new PropertySignature(callingConvention, returnType, returnTypeOptionalCustomModifiers, returnTypeRequiredCustomModifiers,
				parameterTypes, parameterOptionalCustomModifiers, parameterRequiredCustomModifiers);
		}

		private static int ReadTypeSpec(ByteReader br)
		{
			if (br.ReadByte() != Signature.ELEMENT_TYPE_GENERICINST)
			{
				throw new NotImplementedException("Expected ELEMENT_TYPE_GENERICINST");
			}
			switch (br.ReadByte())
			{
				case Signature.ELEMENT_TYPE_CLASS:
				case Signature.ELEMENT_TYPE_VALUETYPE:
					break;
				default:
					throw new NotImplementedException("Expected ELEMENT_TYPE_CLASS or ELEMENT_TYPE_VALUETYPE");
			}
			int encoded = br.ReadCompressedUInt();
			switch (encoded & 3)
			{
				case 0:
					return (TypeDefTable.Index << 24) + (encoded >> 2);
				case 1:
					return (TypeRefTable.Index << 24) + (encoded >> 2);
				case 2:
					return (TypeSpecTable.Index << 24) + (encoded >> 2);
				default:
					throw new BadImageFormatException();
			}
		}

		internal static void ReadDeclarativeSecurity(Assembly asm, List<CustomAttributeData> list, int action, ByteReader br)
		{
			Universe u = asm.universe;
			if (br.PeekByte() == '.')
			{
				br.ReadByte();
				int count = br.ReadCompressedInt();
				for (int j = 0; j < count; j++)
				{
					Type type = ReadType(asm, br);
					ConstructorInfo constructor = type.GetPseudoCustomAttributeConstructor(u.System_Security_Permissions_SecurityAction);
					// LAMESPEC there is an additional length here (probably of the named argument list)
					byte[] blob = br.ReadBytes(br.ReadCompressedInt());
					list.Add(new CustomAttributeData(asm, constructor, action, blob));
				}
			}
			else
			{
				// .NET 1.x format (xml)
				char[] buf = new char[br.Length / 2];
				for (int i = 0; i < buf.Length; i++)
				{
					buf[i] = br.ReadChar();
				}
				string xml = new String(buf);
				ConstructorInfo constructor = u.System_Security_Permissions_PermissionSetAttribute.GetPseudoCustomAttributeConstructor(u.System_Security_Permissions_SecurityAction);
				List<CustomAttributeNamedArgument> args = new List<CustomAttributeNamedArgument>();
				args.Add(new CustomAttributeNamedArgument(GetProperty(u.System_Security_Permissions_PermissionSetAttribute, "XML", u.System_String),
					new CustomAttributeTypedArgument(u.System_String, xml)));
				list.Add(new CustomAttributeData(asm.ManifestModule, constructor, new object[] { action }, args));
			}
		}

		private static CustomAttributeTypedArgument ReadFixedArg(Module context, ByteReader br, Type type)
		{
			Universe u = context.universe;
			if (type == u.System_String)
			{
				return new CustomAttributeTypedArgument(type, br.ReadString());
			}
			else if (type == u.System_Boolean)
			{
				return new CustomAttributeTypedArgument(type, br.ReadByte() != 0);
			}
			else if (type == u.System_Char)
			{
				return new CustomAttributeTypedArgument(type, br.ReadChar());
			}
			else if (type == u.System_Single)
			{
				return new CustomAttributeTypedArgument(type, br.ReadSingle());
			}
			else if (type == u.System_Double)
			{
				return new CustomAttributeTypedArgument(type, br.ReadDouble());
			}
			else if (type == u.System_SByte)
			{
				return new CustomAttributeTypedArgument(type, br.ReadSByte());
			}
			else if (type == u.System_Int16)
			{
				return new CustomAttributeTypedArgument(type, br.ReadInt16());
			}
			else if (type == u.System_Int32)
			{
				return new CustomAttributeTypedArgument(type, br.ReadInt32());
			}
			else if (type == u.System_Int64)
			{
				return new CustomAttributeTypedArgument(type, br.ReadInt64());
			}
			else if (type == u.System_Byte)
			{
				return new CustomAttributeTypedArgument(type, br.ReadByte());
			}
			else if (type == u.System_UInt16)
			{
				return new CustomAttributeTypedArgument(type, br.ReadUInt16());
			}
			else if (type == u.System_UInt32)
			{
				return new CustomAttributeTypedArgument(type, br.ReadUInt32());
			}
			else if (type == u.System_UInt64)
			{
				return new CustomAttributeTypedArgument(type, br.ReadUInt64());
			}
			else if (type == u.System_Type)
			{
				return new CustomAttributeTypedArgument(type, ReadType(context, br));
			}
			else if (type == u.System_Object)
			{
				return ReadFixedArg(context, br, ReadFieldOrPropType(context, br));
			}
			else if (type.IsArray)
			{
				int length = br.ReadInt32();
				if (length == -1)
				{
					return new CustomAttributeTypedArgument(type, null);
				}
				Type elementType = type.GetElementType();
				CustomAttributeTypedArgument[] array = new CustomAttributeTypedArgument[length];
				for (int i = 0; i < length; i++)
				{
					array[i] = ReadFixedArg(context, br, elementType);
				}
				return new CustomAttributeTypedArgument(type, array);
			}
			else if (type.IsEnum)
			{
				return new CustomAttributeTypedArgument(type, ReadFixedArg(context, br, type.GetEnumUnderlyingTypeImpl()).Value);
			}
			else
			{
				throw new InvalidOperationException();
			}
		}

		private static CustomAttributeTypedArgument ReadFixedArg(Assembly asm, ByteReader br, Type type)
		{
			Universe u = asm.universe;
			if (type == u.System_String)
			{
				return new CustomAttributeTypedArgument(type, br.ReadString());
			}
			else if (type == u.System_Type)
			{
				return new CustomAttributeTypedArgument(type, ReadType(asm, br));
			}
			else if (type == u.System_Object)
			{
				return ReadFixedArg(asm, br, ReadFieldOrPropType(asm, br));
			}
			else if (type.IsArray)
			{
				int length = br.ReadInt32();
				if (length == -1)
				{
					return new CustomAttributeTypedArgument(type, null);
				}
				Type elementType = type.GetElementType();
				CustomAttributeTypedArgument[] array = new CustomAttributeTypedArgument[length];
				for (int i = 0; i < length; i++)
				{
					array[i] = ReadFixedArg(asm, br, elementType);
				}
				return new CustomAttributeTypedArgument(type, array);
			}
			else if (type.IsEnum)
			{
				return new CustomAttributeTypedArgument(type, ReadFixedArg(asm, br, type.GetEnumUnderlyingTypeImpl()).Value);
			}
			else
			{
				switch (Type.GetTypeCode(type))
				{
					case TypeCode.Boolean:
						return new CustomAttributeTypedArgument(type, br.ReadByte() != 0);
					case TypeCode.Char:
						return new CustomAttributeTypedArgument(type, br.ReadChar());
					case TypeCode.Single:
						return new CustomAttributeTypedArgument(type, br.ReadSingle());
					case TypeCode.Double:
						return new CustomAttributeTypedArgument(type, br.ReadDouble());
					case TypeCode.SByte:
						return new CustomAttributeTypedArgument(type, br.ReadSByte());
					case TypeCode.Int16:
						return new CustomAttributeTypedArgument(type, br.ReadInt16());
					case TypeCode.Int32:
						return new CustomAttributeTypedArgument(type, br.ReadInt32());
					case TypeCode.Int64:
						return new CustomAttributeTypedArgument(type, br.ReadInt64());
					case TypeCode.Byte:
						return new CustomAttributeTypedArgument(type, br.ReadByte());
					case TypeCode.UInt16:
						return new CustomAttributeTypedArgument(type, br.ReadUInt16());
					case TypeCode.UInt32:
						return new CustomAttributeTypedArgument(type, br.ReadUInt32());
					case TypeCode.UInt64:
						return new CustomAttributeTypedArgument(type, br.ReadUInt64());
					default:
						throw new InvalidOperationException();
				}
			}
		}