ICSharpCode.NRefactory.Utils.FastSerializer.CreateWriter C# (CSharp) Метод

		ObjectWriter CreateWriter(Type type)
		{
			if (type == typeof(string)) {
				// String contents are written in the object creation section,
				// not into the field value section.
				return delegate {};
			}
			bool isArray = type.IsArray;
			if (isArray) {
				if (type.GetArrayRank() != 1)
					throw new NotSupportedException();
				type = type.GetElementType();
				if (!type.IsValueType) {
					return delegate (SerializationContext context, object array) {
						foreach (object val in (object[])array) {
							context.WriteObjectID(val);
						}
					};
				} else if (type == typeof(byte)) {
					return delegate (SerializationContext context, object array) {
						context.writer.Write((byte[])array);
					};
				}
			}
			List<FieldInfo> fields = GetSerializableFields(type);
			if (fields.Count == 0) {
				// The writer has nothing to do for this object.
				return delegate { };
			}
			
			
			DynamicMethod dynamicMethod = new DynamicMethod(
				(isArray ? "WriteArray_" : "Write_") + type.Name,
				typeof(void), new [] { typeof(SerializationContext), typeof(object) },
				true);
			ILGenerator il = dynamicMethod.GetILGenerator();
			
			var writer = il.DeclareLocal(typeof(BinaryWriter));
			
			il.Emit(OpCodes.Ldarg_0);
			il.Emit(OpCodes.Ldfld, writerField);
			il.Emit(OpCodes.Stloc, writer); // writer = context.writer;
			
			if (isArray) {
				var instance = il.DeclareLocal(type.MakeArrayType());
				il.Emit(OpCodes.Ldarg_1);
				il.Emit(OpCodes.Castclass, type.MakeArrayType());
				il.Emit(OpCodes.Stloc, instance); // instance = (type[])arg_1;
				
				// for (int i = 0; i < instance.Length; i++) write instance[i];
				
				var loopStart = il.DefineLabel();
				var loopHead = il.DefineLabel();
				var loopVariable = il.DeclareLocal(typeof(int));
				il.Emit(OpCodes.Ldc_I4_0);
				il.Emit(OpCodes.Stloc, loopVariable); // loopVariable = 0
				il.Emit(OpCodes.Br, loopHead); // goto loopHead;
				
				il.MarkLabel(loopStart);
				
				if (type.IsEnum || type.IsPrimitive) {
					if (type.IsEnum) {
						type = type.GetEnumUnderlyingType();
					}
					Debug.Assert(type.IsPrimitive);
					il.Emit(OpCodes.Ldloc, writer); // writer
					il.Emit(OpCodes.Ldloc, instance); // writer, instance
					il.Emit(OpCodes.Ldloc, loopVariable); // writer, instance, loopVariable
					switch (Type.GetTypeCode(type)) {
						case TypeCode.Boolean:
						case TypeCode.SByte:
						case TypeCode.Byte:
							il.Emit(OpCodes.Ldelem_I1); // writer, instance[loopVariable]
							il.Emit(callVirt, writeByte); // writer.Write(instance[loopVariable]);
							break;
						case TypeCode.Char:
						case TypeCode.Int16:
						case TypeCode.UInt16:
							il.Emit(OpCodes.Ldelem_I2); // writer, instance[loopVariable]
							il.Emit(callVirt, writeShort); // writer.Write(instance[loopVariable]);
							break;
						case TypeCode.Int32:
						case TypeCode.UInt32:
							il.Emit(OpCodes.Ldelem_I4);  // writer, instance[loopVariable]
							il.Emit(callVirt, writeInt); // writer.Write(instance[loopVariable]);
							break;
						case TypeCode.Int64:
						case TypeCode.UInt64:
							il.Emit(OpCodes.Ldelem_I8);  // writer, instance[loopVariable]
							il.Emit(callVirt, writeLong); // writer.Write(instance[loopVariable]);
							break;
						case TypeCode.Single:
							il.Emit(OpCodes.Ldelem_R4);  // writer, instance[loopVariable]
							il.Emit(callVirt, writeFloat); // writer.Write(instance[loopVariable]);
							break;
						case TypeCode.Double:
							il.Emit(OpCodes.Ldelem_R8);  // writer, instance[loopVariable]
							il.Emit(callVirt, writeDouble); // writer.Write(instance[loopVariable]);
							break;
						default:
							throw new NotSupportedException("Unknown primitive type " + type);
					}
				} else {
					il.Emit(OpCodes.Ldloc, instance); // instance
					il.Emit(OpCodes.Ldloc, loopVariable); // instance, loopVariable
					il.Emit(OpCodes.Ldelem, type); // instance[loopVariable]
					EmitWriteValueType(il, writer, type);
				}
				
				il.Emit(OpCodes.Ldloc, loopVariable); // loopVariable
				il.Emit(OpCodes.Ldc_I4_1); // loopVariable, 1
				il.Emit(OpCodes.Add); // loopVariable+1
				il.Emit(OpCodes.Stloc, loopVariable); // loopVariable++;
				
				il.MarkLabel(loopHead);
				il.Emit(OpCodes.Ldloc, loopVariable); // loopVariable
				il.Emit(OpCodes.Ldloc, instance); // loopVariable, instance
				il.Emit(OpCodes.Ldlen); // loopVariable, instance.Length
				il.Emit(OpCodes.Conv_I4);
				il.Emit(OpCodes.Blt, loopStart); // if (loopVariable < instance.Length) goto loopStart;
			} else if (type.IsValueType) {
				// boxed value type
				if (type.IsEnum || type.IsPrimitive) {
					il.Emit(OpCodes.Ldloc, writer);
					il.Emit(OpCodes.Ldarg_1);
					il.Emit(OpCodes.Unbox_Any, type);
					WritePrimitiveValue(il, type);
				} else {
					il.Emit(OpCodes.Ldarg_1);
					il.Emit(OpCodes.Unbox_Any, type);
					EmitWriteValueType(il, writer, type);
				}
			} else {
				// reference type
				var instance = il.DeclareLocal(type);
				il.Emit(OpCodes.Ldarg_1);
				il.Emit(OpCodes.Castclass, type);
				il.Emit(OpCodes.Stloc, instance); // instance = (type)arg_1;
				
				foreach (FieldInfo field in fields) {
					EmitWriteField(il, writer, instance, field); // write instance.Field
				}
			}
			il.Emit(OpCodes.Ret);
			return (ObjectWriter)dynamicMethod.CreateDelegate(typeof(ObjectWriter));
		}