mcs/class/corlib/System.Reflection.Emit/AssemblyBuilder.cs

   1 //
   2 // System.Reflection.Emit/AssemblyBuilder.cs
   3 //
   4 // Author:
   5 //   Paolo Molaro (lupus@ximian.com)
   6 //
   7 // (C) 2001 Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Reflection;
  35 using System.Resources;
  36 using System.IO;
  37 using System.Security.Policy;
  38 using System.Runtime.Serialization;
  39 using System.Globalization;
  40 using System.Runtime.CompilerServices;
  41 using System.Collections;
  42 using System.Runtime.InteropServices;
  43 using System.Security.Cryptography;
  44 using System.Security.Permissions;
  45
  46 using Mono.Security;
  47 using Mono.Security.Cryptography;
  48
  49 namespace System.Reflection.Emit {
  50
  51         internal struct RefEmitPermissionSet {
  52                 public SecurityAction action;
  53                 public string pset;
  54
  55                 public RefEmitPermissionSet (SecurityAction action, string pset) {
  56                         this.action = action;
  57                         this.pset = pset;
  58                 }
  59         }
  60
  61         internal struct MonoResource {
  62                 public byte[] data;
  63                 public string name;
  64                 public string filename;
  65                 public ResourceAttributes attrs;
  66                 public int offset;
  67         }
  68
  69         internal struct MonoWin32Resource {
  70                 public int res_type;
  71                 public int res_id;
  72                 public int lang_id;
  73                 public byte[] data;
  74
  75                 public MonoWin32Resource (int res_type, int res_id, int lang_id, byte[] data) {
  76                         this.res_type = res_type;
  77                         this.res_id = res_id;
  78                         this.lang_id = lang_id;
  79                         this.data = data;
  80                 }
  81         }
  82
  83         public sealed class AssemblyBuilder : Assembly {
  84                 #region Sync with reflection.h
  85                 private IntPtr dynamic_assembly;
  86                 private MethodInfo entry_point;
  87                 private ModuleBuilder[] modules;
  88                 private string name;
  89                 private string dir;
  90                 private CustomAttributeBuilder[] cattrs;
  91                 private MonoResource[] resources;
  92                 byte[] public_key;
  93                 string version;
  94                 string culture;
  95                 uint algid;
  96                 uint flags;
  97                 PEFileKinds pekind = PEFileKinds.Dll;
  98                 bool delay_sign;
  99                 uint access;
 100                 Module[] loaded_modules;
 101                 MonoWin32Resource[] win32_resources;
 102                 #endregion
 103                 internal Type corlib_object_type = typeof (System.Object);
 104                 internal Type corlib_value_type = typeof (System.ValueType);
 105                 internal Type corlib_enum_type = typeof (System.Enum);
 106                 internal Type corlib_void_type = typeof (void);
 107                 ArrayList resource_writers = null;
 108                 Win32VersionResource version_res;
 109                 bool created;
 110                 bool is_module_only;
 111                 private Mono.Security.StrongName sn;
 112
 113                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 114                 private static extern void basic_init (AssemblyBuilder ab);
 115
 116                 internal AssemblyBuilder (AssemblyName n, string directory, AssemblyBuilderAccess access) {
 117                         name = n.Name;
 118                         if (directory == null || directory == String.Empty)
 119                                 dir = Directory.GetCurrentDirectory ();
 120                         else
 121                                 dir = directory;
 122                         this.access = (uint)access;
 123
 124                         /* Set defaults from n */
 125                         if (n.CultureInfo != null) {
 126                                 culture = n.CultureInfo.Name;
 127                         }
 128                         Version v = n.Version;
 129                         if (v != null) {
 130                                 version = v.ToString ();
 131                         }
 132
 133                         if (n.KeyPair != null) {
 134                                 // full keypair is available (for signing)
 135                                 sn = n.KeyPair.StrongName ();
 136                         }
 137                         else {
 138                                 // public key is available (for delay-signing)
 139                                 byte[] pk = n.GetPublicKey ();
 140                                 if ((pk != null) && (pk.Length > 0)) {
 141                                         sn = new Mono.Security.StrongName (pk);
 142                                 }
 143                         }
 144
 145                         basic_init (this);
 146                 }
 147
 148                 public override string CodeBase {
 149                         get {
 150                                 throw not_supported ();
 151                         }
 152                 }
 153
 154                 public override MethodInfo EntryPoint {
 155                         get {
 156                                 return entry_point;
 157                         }
 158                 }
 159
 160                 public override string Location {
 161                         get {
 162                                 throw not_supported ();
 163                         }
 164                 }
 165
 166 #if NET_1_1
 167                 /* This is to keep signature compatibility with MS.NET */
 168                 public override string ImageRuntimeVersion {
 169                         get {
 170                                 return base.ImageRuntimeVersion;
 171                         }
 172                 }
 173 #endif
 174
 175                 public void AddResourceFile (string name, string fileName)
 176                 {
 177                         AddResourceFile (name, fileName, ResourceAttributes.Public);
 178                 }
 179
 180                 public void AddResourceFile (string name, string fileName, ResourceAttributes attribute)
 181                 {
 182                         AddResourceFile (name, fileName, attribute, true);
 183                 }
 184
 185                 private void AddResourceFile (string name, string fileName, ResourceAttributes attribute, bool fileNeedsToExists)
 186                 {
 187                         check_name_and_filename (name, fileName, fileNeedsToExists);
 188
 189                         // Resource files are created/searched under the assembly storage
 190                         // directory
 191                         if (dir != null)
 192                                 fileName = Path.Combine (dir, fileName);
 193
 194                         if (resources != null) {
 195                                 MonoResource[] new_r = new MonoResource [resources.Length + 1];
 196                                 System.Array.Copy(resources, new_r, resources.Length);
 197                                 resources = new_r;
 198                         } else {
 199                                 resources = new MonoResource [1];
 200                         }
 201                         int p = resources.Length - 1;
 202                         resources [p].name = name;
 203                         resources [p].filename = fileName;
 204                         resources [p].attrs = attribute;
 205                 }
 206
 207                 internal void EmbedResourceFile (string name, string fileName)
 208                 {
 209                         EmbedResourceFile (name, fileName, ResourceAttributes.Public);
 210                 }
 211
 212                 internal void EmbedResourceFile (string name, string fileName, ResourceAttributes attribute)
 213                 {
 214                         if (resources != null) {
 215                                 MonoResource[] new_r = new MonoResource [resources.Length + 1];
 216                                 System.Array.Copy(resources, new_r, resources.Length);
 217                                 resources = new_r;
 218                         } else {
 219                                 resources = new MonoResource [1];
 220                         }
 221                         int p = resources.Length - 1;
 222                         resources [p].name = name;
 223                         resources [p].attrs = attribute;
 224                         try {
 225                                 FileStream s = new FileStream (fileName, FileMode.Open, FileAccess.Read);
 226                                 long len = s.Length;
 227                                 resources [p].data = new byte [len];
 228                                 s.Read (resources [p].data, 0, (int)len);
 229                                 s.Close ();
 230                         } catch {
 231                                 /* do something */
 232                         }
 233                 }
 234
 235                 internal void EmbedResource (string name, byte[] blob, ResourceAttributes attribute)
 236                 {
 237                         if (resources != null) {
 238                                 MonoResource[] new_r = new MonoResource [resources.Length + 1];
 239                                 System.Array.Copy(resources, new_r, resources.Length);
 240                                 resources = new_r;
 241                         } else {
 242                                 resources = new MonoResource [1];
 243                         }
 244                         int p = resources.Length - 1;
 245                         resources [p].name = name;
 246                         resources [p].attrs = attribute;
 247                         resources [p].data = blob;
 248                 }
 249
 250                 public ModuleBuilder DefineDynamicModule (string name)
 251                 {
 252                         return DefineDynamicModule (name, name, false, true);
 253                 }
 254
 255                 public ModuleBuilder DefineDynamicModule (string name, bool emitSymbolInfo)
 256                 {
 257                         return DefineDynamicModule (name, name, emitSymbolInfo, true);
 258                 }
 259
 260                 public ModuleBuilder DefineDynamicModule(string name, string fileName)
 261                 {
 262                         return DefineDynamicModule (name, fileName, false, false);
 263                 }
 264
 265                 public ModuleBuilder DefineDynamicModule (string name, string fileName,
 266                                                           bool emitSymbolInfo)
 267                 {
 268                         return DefineDynamicModule (name, fileName, emitSymbolInfo, false);
 269                 }
 270
 271                 private ModuleBuilder DefineDynamicModule (string name, string fileName,
 272                                                                                                    bool emitSymbolInfo, bool transient)
 273                 {
 274                         check_name_and_filename (name, fileName, false);
 275
 276                         if (!transient) {
 277                                 if (Path.GetExtension (fileName) == String.Empty)
 278                                         throw new ArgumentException ("Module file name '" + fileName + "' must have file extension.");
 279                                 if (!IsSave)
 280                                         throw new NotSupportedException ("Persistable modules are not supported in a dynamic assembly created with AssemblyBuilderAccess.Run");
 281                                 if (created)
 282                                         throw new InvalidOperationException ("Assembly was already saved.");
 283                         }
 284
 285                         ModuleBuilder r = new ModuleBuilder (this, name, fileName, emitSymbolInfo, transient);
 286
 287                         if ((modules != null) && is_module_only)
 288                                 throw new InvalidOperationException ("A module-only assembly can only contain one module.");
 289
 290                         if (modules != null) {
 291                                 ModuleBuilder[] new_modules = new ModuleBuilder [modules.Length + 1];
 292                                 System.Array.Copy(modules, new_modules, modules.Length);
 293                                 modules = new_modules;
 294                         } else {
 295                                 modules = new ModuleBuilder [1];
 296                         }
 297                         modules [modules.Length - 1] = r;
 298                         return r;
 299                 }
 300
 301                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 302                 private extern Module InternalAddModule (string fileName);
 303
 304                 /*
 305                  * Mono extension to support /addmodule in mcs.
 306                  */
 307                 internal Module AddModule (string fileName)
 308                 {
 309                         if (fileName == null)
 310                                 throw new ArgumentNullException (fileName);
 311
 312                         Module m = InternalAddModule (fileName);
 313
 314                         if (loaded_modules != null) {
 315                                 Module[] new_modules = new Module [loaded_modules.Length + 1];
 316                                 System.Array.Copy (loaded_modules, new_modules, loaded_modules.Length);
 317                                 loaded_modules = new_modules;
 318                         } else {
 319                                 loaded_modules = new Module [1];
 320                         }
 321                         loaded_modules [loaded_modules.Length - 1] = m;
 322
 323                         return m;
 324                 }
 325
 326                 public IResourceWriter DefineResource (string name, string description, string fileName)
 327                 {
 328                         return DefineResource (name, description, fileName, ResourceAttributes.Public);
 329                 }
 330
 331                 public IResourceWriter DefineResource (string name, string description,
 332                                                        string fileName, ResourceAttributes attribute)
 333                 {
 334                         IResourceWriter writer;
 335
 336                         // description seems to be ignored
 337                         AddResourceFile (name, fileName, attribute, false);
 338                         writer = new ResourceWriter (fileName);
 339                         if (resource_writers == null)
 340                                 resource_writers = new ArrayList ();
 341                         resource_writers.Add (writer);
 342                         return writer;
 343                 }
 344
 345                 private void AddUnmanagedResource (Win32Resource res) {
 346                         MemoryStream ms = new MemoryStream ();
 347                         res.WriteTo (ms);
 348
 349                         if (win32_resources != null) {
 350                                 MonoWin32Resource[] new_res = new MonoWin32Resource [win32_resources.Length + 1];
 351                                 System.Array.Copy (win32_resources, new_res, win32_resources.Length);
 352                                 win32_resources = new_res;
 353                         }
 354                         else
 355                                 win32_resources = new MonoWin32Resource [1];
 356
 357                         win32_resources [win32_resources.Length - 1] = new MonoWin32Resource (res.Type.Id, res.Name.Id, res.Language, ms.ToArray ());
 358                 }
 359
 360                 [MonoTODO]
 361                 public void DefineUnmanagedResource (byte[] resource)
 362                 {
 363                         if (resource == null)
 364                                 throw new ArgumentNullException ("resource");
 365
 366                         /*
 367                          * The format of the argument byte array is not documented
 368                          * so this method is impossible to implement.
 369                          */
 370
 371                         throw new NotImplementedException ();
 372                 }
 373
 374                 public void DefineUnmanagedResource (string resourceFileName)
 375                 {
 376                         if (resourceFileName == null)
 377                                 throw new ArgumentNullException ("resourceFileName");
 378                         if (resourceFileName == String.Empty)
 379                                 throw new ArgumentException ("resourceFileName");
 380                         if (!File.Exists (resourceFileName) || Directory.Exists (resourceFileName))
 381                                 throw new FileNotFoundException ("File '" + resourceFileName + "' does not exists or is a directory.");
 382
 383                         using (FileStream fs = new FileStream (resourceFileName, FileMode.Open)) {
 384                                 Win32ResFileReader reader = new Win32ResFileReader (fs);
 385
 386                                 foreach (Win32EncodedResource res in reader.ReadResources ()) {
 387                                         if (res.Name.IsName || res.Type.IsName)
 388                                                 throw new InvalidOperationException ("resource files with named resources or non-default resource types are not supported.");
 389
 390                                         AddUnmanagedResource (res);
 391                                 }
 392                         }
 393                 }
 394
 395                 public void DefineVersionInfoResource ()
 396                 {
 397                         if (version_res != null)
 398                                 throw new ArgumentException ("Native resource has already been defined.");
 399
 400                         version_res = new Win32VersionResource (1, 0);
 401
 402                         if (cattrs != null) {
 403                                 foreach (CustomAttributeBuilder cb in cattrs) {
 404                                         string attrname = cb.Ctor.ReflectedType.FullName;
 405
 406                                         if (attrname == "System.Reflection.AssemblyProductAttribute")
 407                                                 version_res.ProductName = cb.string_arg ();
 408                                         else if (attrname == "System.Reflection.AssemblyCompanyAttribute")
 409                                                 version_res.CompanyName = cb.string_arg ();
 410                                         else if (attrname == "System.Reflection.AssemblyCopyrightAttribute")
 411                                                 version_res.LegalCopyright = cb.string_arg ();
 412                                         else if (attrname == "System.Reflection.AssemblyTrademarkAttribute")
 413                                                 version_res.LegalTrademarks = cb.string_arg ();
 414                                         else if (attrname == "System.Reflection.AssemblyCultureAttribute")
 415                                                 version_res.FileLanguage = new CultureInfo (cb.string_arg ()).LCID;
 416                                         else if (attrname == "System.Reflection.AssemblyFileVersionAttribute")
 417                                                 version_res.FileVersion = cb.string_arg ();
 418                                         else if (attrname == "System.Reflection.AssemblyInformationalVersionAttribute")
 419                                                 version_res.ProductVersion = cb.string_arg ();
 420                                         else if (attrname == "System.Reflection.AssemblyTitleAttribute")
 421                                                 version_res.FileDescription = cb.string_arg ();
 422                                         else if (attrname == "System.Reflection.AssemblyDescriptionAttribute")
 423                                                 version_res.Comments = cb.string_arg ();
 424                                 }
 425                         }
 426                 }
 427
 428                 public void DefineVersionInfoResource (string product, string productVersion,
 429                                                        string company, string copyright, string trademark)
 430                 {
 431                         if (version_res != null)
 432                                 throw new ArgumentException ("Native resource has already been defined.");
 433
 434                         /*
 435                          * We can only create the resource later, when the file name and
 436                          * the binary version is known.
 437                          */
 438
 439                         version_res = new Win32VersionResource (1, 0);
 440                         version_res.ProductName = product;
 441                         version_res.ProductVersion = productVersion;
 442                         version_res.CompanyName = company;
 443                         version_res.LegalCopyright = copyright;
 444                         version_res.LegalTrademarks = trademark;
 445                 }
 446
 447                 /*
 448                  * Mono extension to support /win32icon in mcs
 449                  */
 450                 internal void DefineIconResource (string iconFileName)
 451                 {
 452                         if (iconFileName == null)
 453                                 throw new ArgumentNullException ("iconFileName");
 454                         if (iconFileName == String.Empty)
 455                                 throw new ArgumentException ("iconFileName");
 456                         if (!File.Exists (iconFileName) || Directory.Exists (iconFileName))
 457                                 throw new FileNotFoundException ("File '" + iconFileName + "' does not exists or is a directory.");
 458
 459                         using (FileStream fs = new FileStream (iconFileName, FileMode.Open)) {
 460                                 Win32IconFileReader reader = new Win32IconFileReader (fs);
 461
 462                                 ICONDIRENTRY[] entries = reader.ReadIcons ();
 463
 464                                 Win32IconResource[] icons = new Win32IconResource [entries.Length];
 465                                 for (int i = 0; i < entries.Length; ++i) {
 466                                         icons [i] = new Win32IconResource (i + 1, 0, entries [i]);
 467                                         AddUnmanagedResource (icons [i]);
 468                                 }
 469
 470                                 Win32GroupIconResource group = new Win32GroupIconResource (1, 0, icons);
 471                                 AddUnmanagedResource (group);
 472                         }
 473                 }
 474
 475                 private void DefineVersionInfoResourceImpl (string fileName) {
 476                         // Add missing info
 477                         if (version_res.FileVersion == "0.0.0.0")
 478                                 version_res.FileVersion = version;
 479                         version_res.InternalName = Path.GetFileNameWithoutExtension (fileName);
 480                         version_res.OriginalFilename = fileName;
 481
 482                         AddUnmanagedResource (version_res);
 483                 }
 484
 485                 public ModuleBuilder GetDynamicModule (string name)
 486                 {
 487                         if (name == null)
 488                                 throw new ArgumentNullException ("name");
 489                         if (name == "")
 490                                 throw new ArgumentException ("Name can't be null");
 491
 492                         if (modules != null)
 493                                 for (int i = 0; i < modules.Length; ++i)
 494                                         if (modules [i].name == name)
 495                                                 return modules [i];
 496                         return null;
 497                 }
 498
 499                 public override Type[] GetExportedTypes ()
 500                 {
 501                         throw not_supported ();
 502                 }
 503
 504                 public override FileStream GetFile (string name)
 505                 {
 506                         throw not_supported ();
 507                 }
 508
 509                 public override FileStream[] GetFiles(bool getResourceModules) {
 510                         throw not_supported ();
 511                 }
 512
 513                 public override ManifestResourceInfo GetManifestResourceInfo(string resourceName) {
 514                         throw not_supported ();
 515                 }
 516
 517                 public override string[] GetManifestResourceNames() {
 518                         throw not_supported ();
 519                 }
 520
 521                 public override Stream GetManifestResourceStream(string name) {
 522                         throw not_supported ();
 523                 }
 524                 public override Stream GetManifestResourceStream(Type type, string name) {
 525                         throw not_supported ();
 526                 }
 527
 528                 internal bool IsSave {
 529                         get {
 530                                 return access != (uint)AssemblyBuilderAccess.Run;
 531                         }
 532                 }
 533
 534                 internal string AssemblyDir {
 535                         get {
 536                                 return dir;
 537                         }
 538                 }
 539
 540                 /*
 541                  * Mono extension. If this is set, the assembly can only contain one
 542                  * module, access should be Save, and the saved image will not contain an
 543                  * assembly manifest.
 544                  */
 545                 internal bool IsModuleOnly {
 546                         get {
 547                                 return is_module_only;
 548                         }
 549                         set {
 550                                 is_module_only = value;
 551                         }
 552                 }
 553
 554                 public void Save (string assemblyFileName)
 555                 {
 556                         if (resource_writers != null) {
 557                                 foreach (IResourceWriter writer in resource_writers) {
 558                                         writer.Generate ();
 559                                         writer.Close ();
 560                                 }
 561                         }
 562
 563                         // Create a main module if not already created
 564                         ModuleBuilder mainModule = null;
 565                         if (modules != null) {
 566                                 foreach (ModuleBuilder module in modules)
 567                                         if (module.FullyQualifiedName == assemblyFileName)
 568                                                 mainModule = module;
 569                         }
 570                         if (mainModule == null)
 571                                 mainModule = DefineDynamicModule ("RefEmit_OnDiskManifestModule", assemblyFileName);
 572
 573                         if (!is_module_only)
 574                                 mainModule.IsMain = true;
 575
 576                         /*
 577                          * Create a new entry point if the one specified
 578                          * by the user is in another module.
 579                          */
 580                         if ((entry_point != null) && entry_point.DeclaringType.Module != mainModule) {
 581                                 Type[] paramTypes;
 582                                 if (entry_point.GetParameters ().Length == 1)
 583                                         paramTypes = new Type [] { typeof (string) };
 584                                 else
 585                                         paramTypes = new Type [0];
 586
 587                                 MethodBuilder mb = mainModule.DefineGlobalMethod ("__EntryPoint$", MethodAttributes.Static|MethodAttributes.PrivateScope, entry_point.ReturnType, paramTypes);
 588                                 ILGenerator ilgen = mb.GetILGenerator ();
 589                                 if (paramTypes.Length == 1)
 590                                         ilgen.Emit (OpCodes.Ldarg_0);
 591                                 ilgen.Emit (OpCodes.Tailcall);
 592                                 ilgen.Emit (OpCodes.Call, entry_point);
 593                                 ilgen.Emit (OpCodes.Ret);
 594
 595                                 entry_point = mb;
 596                         }
 597
 598                         if (version_res != null)
 599                                 DefineVersionInfoResourceImpl (assemblyFileName);
 600
 601                         if (sn != null) {
 602                                 // runtime needs to value to embed it into the assembly
 603                                 public_key = sn.PublicKey;
 604                         }
 605
 606                         foreach (ModuleBuilder module in modules)
 607                                 if (module != mainModule)
 608                                         module.Save ();
 609
 610                         // Write out the main module at the end, because it needs to
 611                         // contain the hash of the other modules
 612                         mainModule.Save ();
 613
 614                         if ((sn != null) && (sn.CanSign)) {
 615                                 sn.Sign (System.IO.Path.Combine (this.AssemblyDir, assemblyFileName));
 616                         }
 617
 618                         created = true;
 619                 }
 620
 621                 public void SetEntryPoint (MethodInfo entryMethod)
 622                 {
 623                         SetEntryPoint (entryMethod, PEFileKinds.ConsoleApplication);
 624                 }
 625
 626                 public void SetEntryPoint (MethodInfo entryMethod, PEFileKinds fileKind)
 627                 {
 628                         if (entryMethod == null)
 629                                 throw new ArgumentNullException ("entryMethod");
 630                         if (entryMethod.DeclaringType.Assembly != this)
 631                                 throw new InvalidOperationException ("Entry method is not defined in the same assembly.");
 632
 633                         entry_point = entryMethod;
 634                         pekind = fileKind;
 635                 }
 636
 637                 public void SetCustomAttribute( CustomAttributeBuilder customBuilder)
 638                 {
 639                         if (customBuilder == null)
 640                                 throw new ArgumentNullException ("customBuilder");
 641
 642                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 643                         byte[] data;
 644                         int pos;
 645
 646                         if (attrname == "System.Reflection.AssemblyVersionAttribute") {
 647                                 version = create_assembly_version (customBuilder.string_arg ());
 648                                 return;
 649                         } else if (attrname == "System.Reflection.AssemblyCultureAttribute") {
 650                                 culture = customBuilder.string_arg ();
 651                         } else if (attrname == "System.Reflection.AssemblyAlgorithmIdAttribute") {
 652                                 data = customBuilder.Data;
 653                                 pos = 2;
 654                                 algid = (uint)data [pos];
 655                                 algid |= ((uint)data [pos + 1]) << 8;
 656                                 algid |= ((uint)data [pos + 2]) << 16;
 657                                 algid |= ((uint)data [pos + 3]) << 24;
 658                         } else if (attrname == "System.Reflection.AssemblyFlagsAttribute") {
 659                                 data = customBuilder.Data;
 660                                 pos = 2;
 661                                 flags = (uint)data [pos];
 662                                 flags |= ((uint)data [pos + 1]) << 8;
 663                                 flags |= ((uint)data [pos + 2]) << 16;
 664                                 flags |= ((uint)data [pos + 3]) << 24;
 665                                 return;
 666                         }
 667
 668                         if (cattrs != null) {
 669                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 670                                 cattrs.CopyTo (new_array, 0);
 671                                 new_array [cattrs.Length] = customBuilder;
 672                                 cattrs = new_array;
 673                         } else {
 674                                 cattrs = new CustomAttributeBuilder [1];
 675                                 cattrs [0] = customBuilder;
 676                         }
 677                 }
 678
 679                 public void SetCustomAttribute ( ConstructorInfo con, byte[] binaryAttribute) {
 680                         if (con == null)
 681                                 throw new ArgumentNullException ("con");
 682                         if (binaryAttribute == null)
 683                                 throw new ArgumentNullException ("binaryAttribute");
 684
 685                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 686                 }
 687
 688                 internal void SetCorlibTypeBuilders (Type corlib_object_type, Type corlib_value_type, Type corlib_enum_type) {
 689                         this.corlib_object_type = corlib_object_type;
 690                         this.corlib_value_type = corlib_value_type;
 691                         this.corlib_enum_type = corlib_enum_type;
 692                 }
 693
 694                 internal void SetCorlibTypeBuilders (Type corlib_object_type, Type corlib_value_type, Type corlib_enum_type, Type corlib_void_type)
 695                 {
 696                         SetCorlibTypeBuilders (corlib_object_type, corlib_value_type, corlib_enum_type);
 697                         this.corlib_void_type = corlib_void_type;
 698                 }
 699
 700                 private Exception not_supported () {
 701                         // Strange message but this is what MS.NET prints...
 702                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 703                 }
 704
 705                 private void check_name_and_filename (string name, string fileName,
 706                                                                                           bool fileNeedsToExists) {
 707                         if (name == null)
 708                                 throw new ArgumentNullException ("name");
 709                         if (fileName == null)
 710                                 throw new ArgumentNullException ("fileName");
 711                         if (name == "")
 712                                 throw new ArgumentException ("name cannot be empty", "name");
 713                         if (fileName == "")
 714                                 throw new ArgumentException ("fileName cannot be empty", "fileName");
 715                         if (Path.GetFileName (fileName) != fileName)
 716                                 throw new ArgumentException ("fileName '" + fileName + "' must not include a path.");
 717
 718                         // Resource files are created/searched under the assembly storage
 719                         // directory
 720                         string fullFileName = fileName;
 721                         if (dir != null)
 722                                 fullFileName = Path.Combine (dir, fileName);
 723
 724                         if (fileNeedsToExists && !File.Exists (fullFileName))
 725                                 throw new FileNotFoundException ("Could not find file '" + fileName + "'");
 726
 727                         if (resources != null) {
 728                                 for (int i = 0; i < resources.Length; ++i) {
 729                                         if (resources [i].filename == fullFileName)
 730                                                 throw new ArgumentException ("Duplicate file name '" + fileName + "'");
 731                                         if (resources [i].name == name)
 732                                                 throw new ArgumentException ("Duplicate name '" + name + "'");
 733                                 }
 734                         }
 735
 736                         if (modules != null) {
 737                                 for (int i = 0; i < modules.Length; ++i) {
 738                                         // Use fileName instead of fullFileName here
 739                                         if (!modules [i].IsTransient () && (modules [i].FileName == fileName))
 740                                                 throw new ArgumentException ("Duplicate file name '" + fileName + "'");
 741                                         if (modules [i].Name == name)
 742                                                 throw new ArgumentException ("Duplicate name '" + name + "'");
 743                                 }
 744                         }
 745                 }
 746
 747                 private String create_assembly_version (String version) {
 748                         String[] parts = version.Split ('.');
 749                         int[] ver = new int [4] { 0, 0, 0, 0 };
 750
 751                         if ((parts.Length < 0) || (parts.Length > 4))
 752                                 throw new ArgumentException ("The version specified '" + version + "' is invalid");
 753
 754                         for (int i = 0; i < parts.Length; ++i) {
 755                                 if (parts [i] == "*") {
 756                                         DateTime now = DateTime.Now;
 757
 758                                         if (i == 2) {
 759                                                 ver [2] = (now - new DateTime (2000, 1, 1)).Days;
 760                                                 if (parts.Length == 3)
 761                                                         ver [3] = (now.Second + (now.Minute * 60) + (now.Hour * 3600)) / 2;
 762                                         }
 763                                         else
 764                                                 if (i == 3)
 765                                                         ver [3] = (now.Second + (now.Minute * 60) + (now.Hour * 3600)) / 2;
 766                                         else
 767                                                 throw new ArgumentException ("The version specified '" + version + "' is invalid");
 768                                 }
 769                                 else {
 770                                         try {
 771                                                 ver [i] = Int32.Parse (parts [i]);
 772                                         }
 773                                         catch (FormatException) {
 774                                                 throw new ArgumentException ("The version specified '" + version + "' is invalid");
 775                                         }
 776                                 }
 777                         }
 778
 779                         return ver [0] + "." + ver [1] + "." + ver [2] + "." + ver [3];
 780                 }
 781         }
 782 }