mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/ObjectWriter.cs

   1 // ObjectWriter.cs\r
   2 //\r
   3 // Author:\r
   4 //   Lluis Sanchez Gual (lluis@ideary.com)\r
   5 //\r
   6 // (C) 2003 Lluis Sanchez Gual\r
   7
   8 //
   9 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30 \r
  31 using System;\r
  32 using System.IO;\r
  33 using System.Collections;\r
  34 using System.Runtime.Serialization;\r
  35 using System.Runtime.Remoting.Messaging;\r
  36 using System.Reflection;\r
  37 using System.Globalization;\r
  38 \r
  39 namespace System.Runtime.Serialization.Formatters.Binary\r
  40 {\r
  41         abstract class TypeMetadata\r
  42         {\r
  43                 public string TypeAssemblyName;\r
  44                 public string InstanceTypeName;\r
  45                 \r
  46                 public abstract void WriteAssemblies (ObjectWriter ow, BinaryWriter writer);\r
  47                 public abstract void WriteTypeData (ObjectWriter ow, BinaryWriter writer, bool writeTypes);\r
  48                 public abstract void WriteObjectData (ObjectWriter ow, BinaryWriter writer, object data);\r
  49                 \r
  50                 public virtual bool IsCompatible (TypeMetadata other)\r
  51                 {\r
  52                         return true;\r
  53                 }\r
  54                 \r
  55                 public abstract bool RequiresTypes { get; }\r
  56         }\r
  57         \r
  58         abstract class ClrTypeMetadata: TypeMetadata\r
  59         {\r
  60                 public Type InstanceType;\r
  61 \r
  62                 public ClrTypeMetadata (Type instanceType)\r
  63                 {\r
  64                         InstanceType = instanceType;\r
  65                         InstanceTypeName = instanceType.FullName;\r
  66                         TypeAssemblyName = instanceType.Assembly.FullName;\r
  67                 }\r
  68                 \r
  69                 public override bool RequiresTypes {\r
  70                         get { return false; }\r
  71                 }\r
  72         }\r
  73         \r
  74         class SerializableTypeMetadata: TypeMetadata\r
  75         {\r
  76                 Type[] types;\r
  77                 string[] names;\r
  78                 \r
  79                 public SerializableTypeMetadata (Type itype, SerializationInfo info)\r
  80                 {\r
  81                         types = new Type [info.MemberCount];\r
  82                         names = new string [info.MemberCount];\r
  83 \r
  84                         SerializationInfoEnumerator e = info.GetEnumerator ();\r
  85 \r
  86                         int n = 0;\r
  87                         while (e.MoveNext ())\r
  88                         {\r
  89                                 types[n] = e.ObjectType;\r
  90                                 names[n] = e.Name;\r
  91                                 n++;\r
  92                         }\r
  93 \r
  94                         TypeAssemblyName = info.AssemblyName;\r
  95                         InstanceTypeName = info.FullTypeName;\r
  96                 }\r
  97                 \r
  98                 public override bool IsCompatible (TypeMetadata other)\r
  99                 {\r
 100                         if (!(other is SerializableTypeMetadata)) return false;\r
 101                         \r
 102                         SerializableTypeMetadata tm = (SerializableTypeMetadata)other;\r
 103                         if (types.Length != tm.types.Length) return false;\r
 104                         if (TypeAssemblyName != tm.TypeAssemblyName) return false;\r
 105                         if (InstanceTypeName != tm.InstanceTypeName) return false;\r
 106                         for (int n=0; n<types.Length; n++)\r
 107                         {\r
 108                                 if (types[n] != tm.types[n]) return false;\r
 109                                 if (names[n] != tm.names[n]) return false;\r
 110                         }\r
 111                         return true;\r
 112                 }\r
 113                 \r
 114                 public override void WriteAssemblies (ObjectWriter ow, BinaryWriter writer)\r
 115                 {\r
 116                         foreach (Type mtype in types)\r
 117                         {\r
 118                                 Type type = mtype;\r
 119                                 while (type.IsArray) \r
 120                                         type = type.GetElementType();\r
 121                                         \r
 122                                 ow.WriteAssembly (writer, type.Assembly);\r
 123                         }\r
 124                 }\r
 125                 \r
 126                 public override void WriteTypeData (ObjectWriter ow, BinaryWriter writer, bool writeTypes)\r
 127                 {\r
 128                         writer.Write (types.Length);\r
 129 \r
 130                         // Names of fields\r
 131                         foreach (string name in names)\r
 132                                 writer.Write (name);\r
 133 \r
 134                         // Types of fields\r
 135                         foreach (Type type in types)\r
 136                                 ObjectWriter.WriteTypeCode (writer, type);\r
 137 \r
 138                         // Type specs of fields\r
 139                         foreach (Type type in types)\r
 140                                 ow.WriteTypeSpec (writer, type);\r
 141                 }\r
 142                 \r
 143                 public override void WriteObjectData (ObjectWriter ow, BinaryWriter writer, object data)\r
 144                 {\r
 145                         SerializationInfo info = (SerializationInfo) data;\r
 146                         SerializationInfoEnumerator e = info.GetEnumerator ();\r
 147 \r
 148                         while (e.MoveNext ())\r
 149                                 ow.WriteValue (writer, e.ObjectType, e.Value);\r
 150                 }\r
 151                 \r
 152                 public override bool RequiresTypes {\r
 153                         get { return true; }\r
 154                 }\r
 155         }\r
 156         \r
 157         class MemberTypeMetadata: ClrTypeMetadata\r
 158         {\r
 159                 MemberInfo[] members;\r
 160                 \r
 161                 public MemberTypeMetadata (Type type, StreamingContext context): base (type)\r
 162                 {\r
 163                         members = FormatterServices.GetSerializableMembers (type, context);\r
 164                 }\r
 165 \r
 166                 public override void WriteAssemblies (ObjectWriter ow, BinaryWriter writer)\r
 167                 {\r
 168                         foreach (FieldInfo field in members)\r
 169                         {\r
 170                                 Type type = field.FieldType;\r
 171                                 while (type.IsArray) \r
 172                                         type = type.GetElementType();\r
 173                                         \r
 174                                 ow.WriteAssembly (writer, type.Assembly);\r
 175                         }\r
 176                 }\r
 177                 \r
 178                 public override void WriteTypeData (ObjectWriter ow, BinaryWriter writer, bool writeTypes)\r
 179                 {\r
 180                         writer.Write (members.Length);\r
 181 \r
 182                         // Names of fields\r
 183                         foreach (FieldInfo field in members)\r
 184                                 writer.Write (field.Name);\r
 185 \r
 186                         if (writeTypes) {\r
 187                                 // Types of fields\r
 188                                 foreach (FieldInfo field in members)\r
 189                                         ObjectWriter.WriteTypeCode (writer, field.FieldType);\r
 190         \r
 191                                 // Type specs of fields\r
 192                                 foreach (FieldInfo field in members)\r
 193                                         ow.WriteTypeSpec (writer, field.FieldType);\r
 194                         }\r
 195                 }\r
 196                 \r
 197                 public override void WriteObjectData (ObjectWriter ow, BinaryWriter writer, object data)\r
 198                 {\r
 199                         object[] values = FormatterServices.GetObjectData (data, members);\r
 200                         for (int n=0; n<values.Length; n++)\r
 201                                 ow.WriteValue (writer, ((FieldInfo)members[n]).FieldType, values[n]);\r
 202                 }\r
 203         }\r
 204         \r
 205         internal class ObjectWriter\r
 206         {\r
 207                 ObjectIDGenerator _idGenerator = new ObjectIDGenerator();\r
 208                 Hashtable _cachedMetadata = new Hashtable();\r
 209                 Queue _pendingObjects = new Queue();\r
 210                 Hashtable _assemblyCache = new Hashtable();\r
 211                 \r
 212                 // Type metadata that can be shared with all serializers\r
 213                 static Hashtable _cachedTypes = new Hashtable();\r
 214 \r
 215                 internal static Assembly CorlibAssembly = typeof(string).Assembly;\r
 216                 internal static string CorlibAssemblyName = typeof(string).Assembly.FullName;\r
 217 \r
 218                 ISurrogateSelector _surrogateSelector;\r
 219                 StreamingContext _context;\r
 220                 FormatterAssemblyStyle _assemblyFormat;\r
 221                 FormatterTypeStyle _typeFormat;\r
 222                 byte[] arrayBuffer;
 223                 int ArrayBufferLength = 4096;\r
 224                 \r
 225                 class MetadataReference\r
 226                 {\r
 227                         public TypeMetadata Metadata;\r
 228                         public long ObjectID;\r
 229                         \r
 230                         public MetadataReference (TypeMetadata metadata, long id)\r
 231                         {\r
 232                                 Metadata = metadata;\r
 233                                 ObjectID = id;\r
 234                         }\r
 235                 }\r
 236                 \r
 237                 public ObjectWriter (ISurrogateSelector surrogateSelector, StreamingContext context, FormatterAssemblyStyle assemblyFormat, FormatterTypeStyle typeFormat)\r
 238                 {\r
 239                         _surrogateSelector = surrogateSelector;\r
 240                         _context = context;\r
 241                         _assemblyFormat = assemblyFormat;\r
 242                         _typeFormat = typeFormat;\r
 243                 }\r
 244 \r
 245                 public void WriteObjectGraph (BinaryWriter writer, object obj, Header[] headers)\r
 246                 {\r
 247                         _pendingObjects.Clear();\r
 248                         if (headers != null) QueueObject (headers);\r
 249                         QueueObject (obj);\r
 250                         WriteQueuedObjects (writer);\r
 251                         WriteSerializationEnd (writer);\r
 252                 }\r
 253 \r
 254                 public void QueueObject (object obj)\r
 255                 {\r
 256                         _pendingObjects.Enqueue (obj);\r
 257                 }\r
 258 \r
 259                 public void WriteQueuedObjects (BinaryWriter writer)\r
 260                 {\r
 261                         while (_pendingObjects.Count > 0)\r
 262                                 WriteObjectInstance (writer, _pendingObjects.Dequeue(), false);\r
 263                 }\r
 264 \r
 265                 public void WriteObjectInstance (BinaryWriter writer, object obj, bool isValueObject)\r
 266                 {\r
 267                         bool firstTime;\r
 268                         long id;\r
 269 \r
 270                         // If the object is a value type (not boxed) then there is no need\r
 271                         // to register it in the id generator, because it won't have other\r
 272                         // references to it\r
 273 \r
 274                         if (isValueObject) id = _idGenerator.NextId;\r
 275                         else id = _idGenerator.GetId (obj, out firstTime);\r
 276 \r
 277                         if (obj is string) {\r
 278                                 WriteString (writer, id, (string)obj);\r
 279                         }\r
 280                         else if (obj is Array) {\r
 281                                 WriteArray (writer, id, (Array)obj);\r
 282                         }\r
 283                         else\r
 284                                 WriteObject (writer, id, obj);\r
 285                 }\r
 286 \r
 287                 public static void WriteSerializationEnd (BinaryWriter writer)\r
 288                 {\r
 289                         writer.Write ((byte) BinaryElement.End);\r
 290                 }\r
 291 \r
 292                 private void WriteObject (BinaryWriter writer, long id, object obj)\r
 293                 {\r
 294                         object data;\r
 295                         TypeMetadata metadata;\r
 296 \r
 297                         GetObjectData (obj, out metadata, out data);\r
 298                         MetadataReference metadataReference = (MetadataReference)_cachedMetadata [metadata.InstanceTypeName];\r
 299 \r
 300                         if (metadataReference != null && metadata.IsCompatible (metadataReference.Metadata))\r
 301                         {\r
 302                                 // An object of the same type has already been serialized\r
 303                                 // It is not necessary to write again type metadata\r
 304 \r
 305                                 writer.Write ((byte) BinaryElement.RefTypeObject);\r
 306                                 writer.Write ((int)id);\r
 307 \r
 308                                 writer.Write ((int)metadataReference.ObjectID);\r
 309                                 metadata.WriteObjectData (this, writer, data);\r
 310                                 return;\r
 311                         }\r
 312 \r
 313                         if (metadataReference == null)\r
 314                         {\r
 315                                 metadataReference = new MetadataReference (metadata, id);\r
 316                                 _cachedMetadata [metadata.InstanceTypeName] = metadataReference;\r
 317                         }\r
 318                         \r
 319                         bool writeTypes = metadata.RequiresTypes || _typeFormat == FormatterTypeStyle.TypesAlways;\r
 320 \r
 321                         BinaryElement objectTag;\r
 322 \r
 323                         int assemblyId;\r
 324                         if (metadata.TypeAssemblyName == CorlibAssemblyName)\r
 325                         {\r
 326                                 // A corlib type\r
 327                                 objectTag = writeTypes ? BinaryElement.RuntimeObject : BinaryElement.UntypedRuntimeObject;\r
 328                                 assemblyId = -1;\r
 329                         }\r
 330                         else\r
 331                         {\r
 332                                 objectTag = writeTypes ? BinaryElement.ExternalObject : BinaryElement.UntypedExternalObject;\r
 333                                 assemblyId = WriteAssemblyName (writer, metadata.TypeAssemblyName);\r
 334                         }\r
 335 \r
 336                         // Registers the assemblies needed for each field\r
 337                         // If there are assemblies that where not registered before this object,\r
 338                         // write them now\r
 339 \r
 340                         metadata.WriteAssemblies (this, writer);\r
 341 \r
 342                         // Writes the object\r
 343 \r
 344                         writer.Write ((byte) objectTag);\r
 345                         writer.Write ((int)id);\r
 346                         writer.Write (metadata.InstanceTypeName);\r
 347                         \r
 348                         metadata.WriteTypeData (this, writer, writeTypes);\r
 349                         if (assemblyId != -1) writer.Write (assemblyId);\r
 350                         \r
 351                         metadata.WriteObjectData (this, writer, data);\r
 352                 }\r
 353 \r
 354                 private void GetObjectData (object obj, out TypeMetadata metadata, out object data)\r
 355                 {\r
 356                         Type instanceType = obj.GetType();\r
 357 \r
 358                         // Check if the formatter has a surrogate selector, if it does, \r
 359                         // check if the surrogate selector handles objects of the given type. \r
 360 \r
 361                         if (_surrogateSelector != null)\r
 362                         {\r
 363                                 ISurrogateSelector selector;\r
 364                                 ISerializationSurrogate surrogate = _surrogateSelector.GetSurrogate (instanceType, _context, out selector);\r
 365                                 if (surrogate != null)\r
 366                                 {\r
 367                                         SerializationInfo info = new SerializationInfo (instanceType, new FormatterConverter ());\r
 368                                         surrogate.GetObjectData (obj, info, _context);\r
 369                                         metadata = new SerializableTypeMetadata (instanceType, info);\r
 370                                         data = info;\r
 371                                         return;\r
 372                                 }\r
 373                         }\r
 374 \r
 375                         // Check if the object is marked with the Serializable attribute\r
 376 \r
 377                         BinaryCommon.CheckSerializable (instanceType, _surrogateSelector, _context);\r
 378 \r
 379                         ISerializable ser = obj as ISerializable;\r
 380 \r
 381                         if (ser != null) \r
 382                         {\r
 383                                 SerializationInfo info = new SerializationInfo (instanceType, new FormatterConverter ());\r
 384                                 ser.GetObjectData (info, _context);\r
 385                                 metadata = new SerializableTypeMetadata (instanceType, info);\r
 386                                 data = info;\r
 387                         } \r
 388                         else \r
 389                         {\r
 390                                 data = obj;\r
 391                                 if (_context.Context != null)\r
 392                                 {\r
 393                                         // Don't cache metadata info when the Context property is not null sice\r
 394                                         // we can't control the number of possible contexts in this case\r
 395                                         metadata = new MemberTypeMetadata (instanceType, _context);\r
 396                                         return;\r
 397                                 }\r
 398                                 \r
 399                                 Hashtable typesTable;\r
 400                                 bool isNew = false;\r
 401                                 lock (_cachedTypes) {\r
 402                                         typesTable = (Hashtable) _cachedTypes [_context.State];\r
 403                                         if (typesTable == null) {\r
 404                                                 typesTable = new Hashtable ();\r
 405                                                 _cachedTypes [_context.State] = typesTable;\r
 406                                                 isNew = true;\r
 407                                         }\r
 408                                 }\r
 409 \r
 410                                 metadata = null;\r
 411                                 lock (typesTable) {\r
 412                                         if (!isNew) {\r
 413                                                 metadata = (TypeMetadata) typesTable [instanceType];\r
 414                                         }\r
 415 \r
 416                                         if (metadata == null) {\r
 417                                                 metadata = CreateMemberTypeMetadata (instanceType);\r
 418                                         }\r
 419 \r
 420                                         typesTable [instanceType] = metadata;\r
 421                                 }\r
 422                         }\r
 423                 }\r
 424                 \r
 425                 TypeMetadata CreateMemberTypeMetadata (Type type)\r
 426                 {\r
 427                         if (!BinaryCommon.UseReflectionSerialization) {\r
 428                                 Type metaType = CodeGenerator.GenerateMetadataType (type, _context);\r
 429                                 return (TypeMetadata) Activator.CreateInstance (metaType);\r
 430                         }\r
 431                         else\r
 432                                 return new MemberTypeMetadata (type, _context);\r
 433                 }\r
 434 \r
 435                 private void WriteArray (BinaryWriter writer, long id, Array array)\r
 436                 {\r
 437                         // There are 4 ways of serializing arrays:\r
 438                         // The element GenericArray (7) can be used for all arrays.\r
 439                         // The element ArrayOfPrimitiveType (15) can be used for single-dimensional\r
 440                         // arrays of primitive types\r
 441                         // The element ArrayOfObject (16) can be used for single-dimensional Object arrays\r
 442                         // The element ArrayOfString (17) can be used for single-dimensional string arrays\r
 443 \r
 444                         Type elementType = array.GetType().GetElementType();\r
 445 \r
 446                         if (elementType == typeof (object) && array.Rank == 1) {\r
 447                                 WriteObjectArray (writer, id, array);\r
 448                         }\r
 449                         else if (elementType == typeof (string) && array.Rank == 1) {\r
 450                                 WriteStringArray (writer, id, array);\r
 451                         }\r
 452                         else if (BinaryCommon.IsPrimitive(elementType) && array.Rank == 1) {\r
 453                                 WritePrimitiveTypeArray (writer, id, array);\r
 454                         }\r
 455                         else\r
 456                                 WriteGenericArray (writer, id, array);\r
 457                 }\r
 458 \r
 459                 private void WriteGenericArray (BinaryWriter writer, long id, Array array)\r
 460                 {\r
 461                         Type elementType = array.GetType().GetElementType();\r
 462 \r
 463                         // Registers and writes the assembly of the array element type if needed\r
 464 \r
 465                         if (!elementType.IsArray)\r
 466                                 WriteAssembly (writer, elementType.Assembly);\r
 467 \r
 468                         // Writes the array\r
 469 \r
 470                         writer.Write ((byte) BinaryElement.GenericArray);\r
 471                         writer.Write ((int)id);\r
 472                         \r
 473                         // Write the structure of the array\r
 474 \r
 475                         if (elementType.IsArray) \r
 476                                 writer.Write ((byte) ArrayStructure.Jagged);\r
 477                         else if (array.Rank == 1)\r
 478                                 writer.Write ((byte) ArrayStructure.SingleDimensional);\r
 479                         else\r
 480                                 writer.Write ((byte) ArrayStructure.MultiDimensional);\r
 481 \r
 482                         // Write the number of dimensions and the length\r
 483                         // of each dimension\r
 484 \r
 485                         writer.Write (array.Rank);\r
 486                         for (int n=0; n<array.Rank; n++)\r
 487                                 writer.Write (array.GetUpperBound (n) + 1);\r
 488 \r
 489                         // Writes the type\r
 490                         WriteTypeCode (writer, elementType);\r
 491                         WriteTypeSpec (writer, elementType);\r
 492 \r
 493                         // Writes the values. For single-dimension array, a special tag is used\r
 494                         // to represent multiple consecutive null values. I don't know why this\r
 495                         // optimization is not used for multidimensional arrays.\r
 496 \r
 497                         if (array.Rank == 1 && !elementType.IsValueType)\r
 498                         {\r
 499                                 WriteSingleDimensionArrayElements (writer, array, elementType);\r
 500                         }\r
 501                         else\r
 502                         {\r
 503                                 foreach (object item in array)\r
 504                                         WriteValue (writer, elementType, item);\r
 505                         }\r
 506                 }\r
 507 \r
 508                 private void WriteObjectArray (BinaryWriter writer, long id, Array array)\r
 509                 {\r
 510                         writer.Write ((byte) BinaryElement.ArrayOfObject);\r
 511                         writer.Write ((int)id);\r
 512                         writer.Write (array.Length);    // Single dimension. Just write the length\r
 513                         WriteSingleDimensionArrayElements (writer, array, typeof (object));\r
 514                 }\r
 515 \r
 516                 private void WriteStringArray (BinaryWriter writer, long id, Array array)\r
 517                 {\r
 518                         writer.Write ((byte) BinaryElement.ArrayOfString);\r
 519                         writer.Write ((int)id);\r
 520                         writer.Write (array.Length);    // Single dimension. Just write the length\r
 521                         WriteSingleDimensionArrayElements (writer, array, typeof (string));\r
 522                 }\r
 523 \r
 524                 private void WritePrimitiveTypeArray (BinaryWriter writer, long id, Array array)\r
 525                 {\r
 526                         writer.Write ((byte) BinaryElement.ArrayOfPrimitiveType);\r
 527                         writer.Write ((int)id);\r
 528                         writer.Write (array.Length);    // Single dimension. Just write the length\r
 529 \r
 530                         Type elementType = array.GetType().GetElementType();\r
 531                         WriteTypeSpec (writer, elementType);\r
 532 \r
 533                         switch (Type.GetTypeCode (elementType))\r
 534                         {\r
 535                                 case TypeCode.Boolean:\r
 536                                         foreach (bool item in (bool[]) array)\r
 537                                                 writer.Write (item);\r
 538                                         break;\r
 539 \r
 540                                 case TypeCode.Byte:\r
 541                                         writer.Write ((byte[]) array);\r
 542                                         break;\r
 543 \r
 544                                 case TypeCode.Char:\r
 545                                         writer.Write ((char[]) array);\r
 546                                         break;\r
 547 \r
 548                                 case TypeCode.DateTime: \r
 549                                         foreach (DateTime item in (DateTime[]) array)\r
 550                                                 writer.Write (item.Ticks);\r
 551                                         break;\r
 552 \r
 553                                 case TypeCode.Decimal:\r
 554                                         foreach (decimal item in (decimal[]) array)\r
 555                                                 writer.Write (item);\r
 556                                         break;\r
 557 \r
 558                                 case TypeCode.Double:
 559                                         if (array.Length > 2)
 560                                                 BlockWrite (writer, array, 8);
 561                                         else\r
 562                                                 foreach (double item in (double[]) array)
 563                                                         writer.Write (item);\r
 564                                         break;\r
 565 \r
 566                                 case TypeCode.Int16:\r
 567                                         if (array.Length > 2)
 568                                                 BlockWrite (writer, array, 2);
 569                                         else
 570                                                 foreach (short item in (short[]) array)\r
 571                                                         writer.Write (item);\r
 572                                         break;\r
 573 \r
 574                                 case TypeCode.Int32:
 575                                         if (array.Length > 2)
 576                                                 BlockWrite (writer, array, 4);
 577                                         else\r
 578                                                 foreach (int item in (int[]) array)\r
 579                                                         writer.Write (item);\r
 580                                         break;\r
 581 \r
 582                                 case TypeCode.Int64:
 583                                         if (array.Length > 2)
 584                                                 BlockWrite (writer, array, 8);
 585                                         else\r
 586                                                 foreach (long item in (long[]) array)
 587                                                         writer.Write (item);\r
 588                                         break;\r
 589 \r
 590                                 case TypeCode.SByte:\r
 591                                         if (array.Length > 2)
 592                                                 BlockWrite (writer, array, 1);
 593                                         else\r
 594                                                 foreach (sbyte item in (sbyte[]) array)\r
 595                                                         writer.Write (item);\r
 596                                         break;\r
 597 \r
 598                                 case TypeCode.Single:\r
 599                                         if (array.Length > 2)
 600                                                 BlockWrite (writer, array, 4);
 601                                         else\r
 602                                                 foreach (float item in (float[]) array)\r
 603                                                         writer.Write (item);\r
 604                                         break;\r
 605 \r
 606                                 case TypeCode.UInt16:\r
 607                                         if (array.Length > 2)
 608                                                 BlockWrite (writer, array, 2);
 609                                         else\r
 610                                                 foreach (ushort item in (ushort[]) array)\r
 611                                                         writer.Write (item);\r
 612                                         break;\r
 613 \r
 614                                 case TypeCode.UInt32:\r
 615                                         if (array.Length > 2)
 616                                                 BlockWrite (writer, array, 4);
 617                                         else\r
 618                                                 foreach (uint item in (uint[]) array)\r
 619                                                         writer.Write (item);\r
 620                                         break;\r
 621 \r
 622                                 case TypeCode.UInt64:\r
 623                                         if (array.Length > 2)
 624                                                 BlockWrite (writer, array, 8);
 625                                         else\r
 626                                                 foreach (ulong item in (ulong[]) array)\r
 627                                                         writer.Write (item);\r
 628                                         break;\r
 629 \r
 630                                 case TypeCode.String:\r
 631                                         foreach (string item in (string[]) array)\r
 632                                                 writer.Write (item);\r
 633                                         break;\r
 634 \r
 635                                 default:\r
 636                                         if (elementType == typeof (TimeSpan)) {\r
 637                                                 foreach (TimeSpan item in (TimeSpan[]) array)\r
 638                                                         writer.Write (item.Ticks);\r
 639                                         }\r
 640                                         else\r
 641                                                 throw new NotSupportedException ("Unsupported primitive type: " + elementType.FullName);\r
 642                                         break;\r
 643                         }                       \r
 644                 }
 645
 646                 private void BlockWrite (BinaryWriter writer, Array array, int dataSize)
 647                 {
 648                         int totalSize = Buffer.ByteLength (array);
 649
 650                         if (arrayBuffer == null || (totalSize > arrayBuffer.Length && arrayBuffer.Length != ArrayBufferLength))
 651                                 arrayBuffer = new byte [totalSize <= ArrayBufferLength ? totalSize : ArrayBufferLength];
 652
 653                         int pos = 0;
 654                         while (totalSize > 0) {
 655                                 int size = totalSize < arrayBuffer.Length ? totalSize : arrayBuffer.Length;
 656                                 Buffer.BlockCopy (array, pos, arrayBuffer, 0, size);
 657
 658                                 if (!BitConverter.IsLittleEndian && dataSize > 1)
 659                                         BinaryCommon.SwapBytes (arrayBuffer, size, dataSize);
 660
 661                                 writer.Write (arrayBuffer, 0, size);
 662                                 totalSize -= size;
 663                                 pos += size;
 664                         }
 665                 }\r
 666 \r
 667                 private void WriteSingleDimensionArrayElements (BinaryWriter writer, Array array, Type elementType)\r
 668                 {\r
 669                         int numNulls = 0;\r
 670                         foreach (object val in array)\r
 671                         {\r
 672                                 if (val != null && numNulls > 0)\r
 673                                 {\r
 674                                         WriteNullFiller (writer, numNulls);\r
 675                                         WriteValue (writer, elementType, val);\r
 676                                         numNulls = 0;\r
 677                                 }\r
 678                                 else if (val == null)\r
 679                                         numNulls++;\r
 680                                 else\r
 681                                         WriteValue (writer, elementType, val);\r
 682                         }\r
 683                         if (numNulls > 0)\r
 684                                 WriteNullFiller (writer, numNulls);\r
 685                 }\r
 686 \r
 687                 private void WriteNullFiller (BinaryWriter writer, int numNulls)\r
 688                 {\r
 689                         if (numNulls == 1) {\r
 690                                 writer.Write ((byte) BinaryElement.NullValue);\r
 691                         }\r
 692                         else if (numNulls == 2) {\r
 693                                 writer.Write ((byte) BinaryElement.NullValue);\r
 694                                 writer.Write ((byte) BinaryElement.NullValue);\r
 695                         }\r
 696                         else if (numNulls <= byte.MaxValue) {\r
 697                                 writer.Write ((byte) BinaryElement.ArrayFiller8b);\r
 698                                 writer.Write ((byte) numNulls);\r
 699                         }\r
 700                         else {\r
 701                                 writer.Write ((byte) BinaryElement.ArrayFiller32b);\r
 702                                 writer.Write (numNulls);\r
 703                         }\r
 704                 }\r
 705 \r
 706                 private void WriteObjectReference (BinaryWriter writer, long id)\r
 707                 {\r
 708 \r
 709                         writer.Write ((byte) BinaryElement.ObjectReference);\r
 710                         writer.Write ((int)id);\r
 711                 }\r
 712 \r
 713                 public void WriteValue (BinaryWriter writer, Type valueType, object val)\r
 714                 {\r
 715                         if (val == null) \r
 716                         {\r
 717                                 BinaryCommon.CheckSerializable (valueType, _surrogateSelector, _context);\r
 718                                 writer.Write ((byte) BinaryElement.NullValue);\r
 719                         }\r
 720                         else if (BinaryCommon.IsPrimitive(val.GetType()))\r
 721                         {\r
 722                                 if (!BinaryCommon.IsPrimitive(valueType))\r
 723                                 {\r
 724                                         // It is a boxed primitive type value\r
 725                                         writer.Write ((byte) BinaryElement.BoxedPrimitiveTypeValue);\r
 726                                         WriteTypeSpec (writer, val.GetType());\r
 727                                 }\r
 728                                 WritePrimitiveValue (writer, val);\r
 729                         }\r
 730                         else if (valueType.IsValueType)\r
 731                         {\r
 732                                 // Value types are written embedded in the containing object\r
 733                                 WriteObjectInstance (writer, val, true);\r
 734                         }\r
 735                         else if (val is string)\r
 736                         {\r
 737                                 // Strings are written embedded, unless already registered\r
 738                                 bool firstTime;\r
 739                                 long id = _idGenerator.GetId (val, out firstTime);\r
 740 \r
 741                                 if (firstTime) WriteObjectInstance (writer, val, false);\r
 742                                 else WriteObjectReference (writer, id);\r
 743                         }                       \r
 744                         else\r
 745                         {\r
 746                                 // It is a reference type. Write a forward reference and queue the\r
 747                                 // object to the pending object list (unless already written).\r
 748 \r
 749                                 bool firstTime;\r
 750                                 long id = _idGenerator.GetId (val, out firstTime);\r
 751 \r
 752                                 if (firstTime) _pendingObjects.Enqueue (val);\r
 753                                 WriteObjectReference (writer, id);\r
 754                         }\r
 755                 }\r
 756                 \r
 757                 private void WriteString (BinaryWriter writer, long id, string str)\r
 758                 {\r
 759                         writer.Write ((byte) BinaryElement.String);\r
 760                         writer.Write ((int)id);\r
 761                         writer.Write (str);\r
 762                 }\r
 763 \r
 764                 public int WriteAssembly (BinaryWriter writer, Assembly assembly)\r
 765                 {\r
 766                         return WriteAssemblyName (writer, assembly.FullName);\r
 767                 }\r
 768                 \r
 769                 public int WriteAssemblyName (BinaryWriter writer, string assembly)\r
 770                 {\r
 771                         if (assembly == ObjectWriter.CorlibAssemblyName) return -1;\r
 772                         \r
 773                         bool firstTime;\r
 774                         int id = RegisterAssembly (assembly, out firstTime);\r
 775                         if (!firstTime) return id;\r
 776                                         \r
 777                         writer.Write ((byte) BinaryElement.Assembly);\r
 778                         writer.Write (id);\r
 779                         if (_assemblyFormat == FormatterAssemblyStyle.Full)\r
 780                                 writer.Write (assembly);\r
 781                         else {\r
 782                                 int i = assembly.IndexOf (',');\r
 783                                 if (i != -1) assembly = assembly.Substring (0, i);\r
 784                                 writer.Write (assembly);\r
 785                         }\r
 786                                 \r
 787                         return id;\r
 788                 }\r
 789 \r
 790                 public int GetAssemblyId (Assembly assembly)\r
 791                 {\r
 792                         return GetAssemblyNameId (assembly.FullName);\r
 793                 }\r
 794                 \r
 795                 public int GetAssemblyNameId (string assembly)\r
 796                 {\r
 797                         return (int)_assemblyCache[assembly];\r
 798                 }\r
 799 \r
 800                 private int RegisterAssembly (string assembly, out bool firstTime)\r
 801                 {\r
 802                         if (_assemblyCache.ContainsKey (assembly))\r
 803                         {\r
 804                                 firstTime = false;\r
 805                                 return (int)_assemblyCache[assembly];\r
 806                         }\r
 807                         else\r
 808                         {\r
 809                                 int id = (int)_idGenerator.GetId (0, out firstTime);\r
 810                                 _assemblyCache.Add (assembly, id);\r
 811                                 return id;\r
 812                         }\r
 813                 }\r
 814 \r
 815                 public static void WritePrimitiveValue (BinaryWriter writer, object value)\r
 816                 {\r
 817                         Type type = value.GetType();\r
 818 \r
 819                         switch (Type.GetTypeCode (type))\r
 820                         {\r
 821                                 case TypeCode.Boolean:\r
 822                                         writer.Write ((bool)value);\r
 823                                         break;\r
 824 \r
 825                                 case TypeCode.Byte:\r
 826                                         writer.Write ((byte) value);\r
 827                                         break;\r
 828 \r
 829                                 case TypeCode.Char:\r
 830                                         writer.Write ((char) value);\r
 831                                         break;\r
 832 \r
 833                                 case TypeCode.DateTime: \r
 834                                         writer.Write ( ((DateTime)value).Ticks);\r
 835                                         break;\r
 836 \r
 837                                 case TypeCode.Decimal:\r
 838                                         writer.Write (((decimal) value).ToString (CultureInfo.InvariantCulture));\r
 839                                         break;\r
 840 \r
 841                                 case TypeCode.Double:\r
 842                                         writer.Write ((double) value);\r
 843                                         break;\r
 844 \r
 845                                 case TypeCode.Int16:\r
 846                                         writer.Write ((short) value);\r
 847                                         break;\r
 848 \r
 849                                 case TypeCode.Int32:\r
 850                                         writer.Write ((int) value);\r
 851                                         break;\r
 852 \r
 853                                 case TypeCode.Int64:\r
 854                                         writer.Write ((long) value);\r
 855                                         break;\r
 856 \r
 857                                 case TypeCode.SByte:\r
 858                                         writer.Write ((sbyte) value);\r
 859                                         break;\r
 860 \r
 861                                 case TypeCode.Single:\r
 862                                         writer.Write ((float) value);\r
 863                                         break;\r
 864 \r
 865                                 case TypeCode.UInt16:\r
 866                                         writer.Write ((ushort) value);\r
 867                                         break;\r
 868 \r
 869                                 case TypeCode.UInt32:\r
 870                                         writer.Write ((uint) value);\r
 871                                         break;\r
 872 \r
 873                                 case TypeCode.UInt64:\r
 874                                         writer.Write ((ulong) value);\r
 875                                         break;\r
 876 \r
 877                                 case TypeCode.String:\r
 878                                         writer.Write ((string) value);\r
 879                                         break;\r
 880 \r
 881                                 default:\r
 882                                         if (type == typeof (TimeSpan))\r
 883                                                 writer.Write (((TimeSpan)value).Ticks);\r
 884                                         else\r
 885                                                 throw new NotSupportedException ("Unsupported primitive type: " + value.GetType().FullName);\r
 886                                         break;\r
 887                         }\r
 888                 }\r
 889 \r
 890                 public static void WriteTypeCode (BinaryWriter writer, Type type)\r
 891                 {\r
 892                         writer.Write ((byte) GetTypeTag (type));\r
 893                 }\r
 894 \r
 895                 public static TypeTag GetTypeTag (Type type)\r
 896                 {\r
 897                         if (type == typeof (string)) {\r
 898                                 return TypeTag.String;\r
 899                         }\r
 900                         else if (BinaryCommon.IsPrimitive (type)) {\r
 901                                 return TypeTag.PrimitiveType;\r
 902                         }\r
 903                         else if (type == typeof (object)) {\r
 904                                 return TypeTag.ObjectType;\r
 905                         }\r
 906                         else if (type.IsArray && type.GetArrayRank() == 1 && type.GetElementType() == typeof (object)) {\r
 907                                 return TypeTag.ArrayOfObject; \r
 908                         }\r
 909                         else if (type.IsArray && type.GetArrayRank() == 1 && type.GetElementType() == typeof (string)){\r
 910                                 return TypeTag.ArrayOfString;\r
 911                         }\r
 912                         else if (type.IsArray && type.GetArrayRank() == 1 && BinaryCommon.IsPrimitive(type.GetElementType())) {\r
 913                                 return TypeTag.ArrayOfPrimitiveType;\r
 914                         }\r
 915                         else if (type.Assembly == CorlibAssembly) {\r
 916                                 return TypeTag.RuntimeType;\r
 917                         }\r
 918                         else\r
 919                                 return TypeTag.GenericType;\r
 920                 }\r
 921 \r
 922                 public void WriteTypeSpec (BinaryWriter writer, Type type)\r
 923                 {\r
 924                         // WARNING Keep in sync with EmitWriteTypeSpec\r
 925                         \r
 926                         switch (GetTypeTag (type))\r
 927                         {\r
 928                                 case TypeTag.PrimitiveType:\r
 929                                         writer.Write (BinaryCommon.GetTypeCode (type));\r
 930                                         break;\r
 931 \r
 932                                 case TypeTag.RuntimeType:\r
 933                                         writer.Write (type.FullName);\r
 934                                         break;\r
 935 \r
 936                                 case TypeTag.GenericType:\r
 937                                         writer.Write (type.FullName);\r
 938                                         writer.Write ((int)GetAssemblyId (type.Assembly));\r
 939                                         break;\r
 940 \r
 941                                 case TypeTag.ArrayOfPrimitiveType:\r
 942                                         writer.Write (BinaryCommon.GetTypeCode (type.GetElementType()));\r
 943                                         break;\r
 944 \r
 945                                 default:\r
 946                                         // Type spec not needed\r
 947                                         break;\r
 948                         }\r
 949                 }\r
 950         }\r
 951 }\r