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                                 sn = n.KeyPair.StrongName ();
 135                         }
 136
 137                         basic_init (this);
 138                 }
 139
 140                 public override string CodeBase {
 141                         get {
 142                                 throw not_supported ();
 143                         }
 144                 }
 145
 146                 public override MethodInfo EntryPoint {
 147                         get {
 148                                 return entry_point;
 149                         }
 150                 }
 151
 152                 public override string Location {
 153                         get {
 154                                 throw not_supported ();
 155                         }
 156                 }
 157
 158 #if NET_1_1
 159                 /* This is to keep signature compatibility with MS.NET */
 160                 public override string ImageRuntimeVersion {
 161                         get {
 162                                 return base.ImageRuntimeVersion;
 163                         }
 164                 }
 165 #endif
 166
 167                 public void AddResourceFile (string name, string fileName)
 168                 {
 169                         AddResourceFile (name, fileName, ResourceAttributes.Public);
 170                 }
 171
 172                 public void AddResourceFile (string name, string fileName, ResourceAttributes attribute)
 173                 {
 174                         AddResourceFile (name, fileName, attribute, true);
 175                 }
 176
 177                 private void AddResourceFile (string name, string fileName, ResourceAttributes attribute, bool fileNeedsToExists)
 178                 {
 179                         check_name_and_filename (name, fileName, fileNeedsToExists);
 180
 181                         // Resource files are created/searched under the assembly storage
 182                         // directory
 183                         if (dir != null)
 184                                 fileName = Path.Combine (dir, fileName);
 185
 186                         if (resources != null) {
 187                                 MonoResource[] new_r = new MonoResource [resources.Length + 1];
 188                                 System.Array.Copy(resources, new_r, resources.Length);
 189                                 resources = new_r;
 190                         } else {
 191                                 resources = new MonoResource [1];
 192                         }
 193                         int p = resources.Length - 1;
 194                         resources [p].name = name;
 195                         resources [p].filename = fileName;
 196                         resources [p].attrs = attribute;
 197                 }
 198
 199                 internal void EmbedResourceFile (string name, string fileName)
 200                 {
 201                         EmbedResourceFile (name, fileName, ResourceAttributes.Public);
 202                 }
 203
 204                 internal void EmbedResourceFile (string name, string fileName, ResourceAttributes attribute)
 205                 {
 206                         if (resources != null) {
 207                                 MonoResource[] new_r = new MonoResource [resources.Length + 1];
 208                                 System.Array.Copy(resources, new_r, resources.Length);
 209                                 resources = new_r;
 210                         } else {
 211                                 resources = new MonoResource [1];
 212                         }
 213                         int p = resources.Length - 1;
 214                         resources [p].name = name;
 215                         resources [p].attrs = attribute;
 216                         try {
 217                                 FileStream s = new FileStream (fileName, FileMode.Open, FileAccess.Read);
 218                                 long len = s.Length;
 219                                 resources [p].data = new byte [len];
 220                                 s.Read (resources [p].data, 0, (int)len);
 221                                 s.Close ();
 222                         } catch {
 223                                 /* do something */
 224                         }
 225                 }
 226
 227                 internal void EmbedResource (string name, byte[] blob, ResourceAttributes attribute)
 228                 {
 229                         if (resources != null) {
 230                                 MonoResource[] new_r = new MonoResource [resources.Length + 1];
 231                                 System.Array.Copy(resources, new_r, resources.Length);
 232                                 resources = new_r;
 233                         } else {
 234                                 resources = new MonoResource [1];
 235                         }
 236                         int p = resources.Length - 1;
 237                         resources [p].name = name;
 238                         resources [p].attrs = attribute;
 239                         resources [p].data = blob;
 240                 }
 241
 242                 public ModuleBuilder DefineDynamicModule (string name)
 243                 {
 244                         return DefineDynamicModule (name, name, false, true);
 245                 }
 246
 247                 public ModuleBuilder DefineDynamicModule (string name, bool emitSymbolInfo)
 248                 {
 249                         return DefineDynamicModule (name, name, emitSymbolInfo, true);
 250                 }
 251
 252                 public ModuleBuilder DefineDynamicModule(string name, string fileName)
 253                 {
 254                         return DefineDynamicModule (name, fileName, false, false);
 255                 }
 256
 257                 public ModuleBuilder DefineDynamicModule (string name, string fileName,
 258                                                           bool emitSymbolInfo)
 259                 {
 260                         return DefineDynamicModule (name, fileName, emitSymbolInfo, false);
 261                 }
 262
 263                 private ModuleBuilder DefineDynamicModule (string name, string fileName,
 264                                                                                                    bool emitSymbolInfo, bool transient)
 265                 {
 266                         check_name_and_filename (name, fileName, false);
 267
 268                         if (!transient) {
 269                                 if (Path.GetExtension (fileName) == String.Empty)
 270                                         throw new ArgumentException ("Module file name '" + fileName + "' must have file extension.");
 271                                 if (!IsSave)
 272                                         throw new NotSupportedException ("Persistable modules are not supported in a dynamic assembly created with AssemblyBuilderAccess.Run");
 273                                 if (created)
 274                                         throw new InvalidOperationException ("Assembly was already saved.");
 275                         }
 276
 277                         ModuleBuilder r = new ModuleBuilder (this, name, fileName, emitSymbolInfo, transient);
 278
 279                         if ((modules != null) && is_module_only)
 280                                 throw new InvalidOperationException ("A module-only assembly can only contain one module.");
 281
 282                         if (modules != null) {
 283                                 ModuleBuilder[] new_modules = new ModuleBuilder [modules.Length + 1];
 284                                 System.Array.Copy(modules, new_modules, modules.Length);
 285                                 modules = new_modules;
 286                         } else {
 287                                 modules = new ModuleBuilder [1];
 288                         }
 289                         modules [modules.Length - 1] = r;
 290                         return r;
 291                 }
 292
 293                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 294                 private extern Module InternalAddModule (string fileName);
 295
 296                 /*
 297                  * Mono extension to support /addmodule in mcs.
 298                  */
 299                 internal Module AddModule (string fileName)
 300                 {
 301                         if (fileName == null)
 302                                 throw new ArgumentNullException (fileName);
 303
 304                         Module m = InternalAddModule (fileName);
 305
 306                         if (loaded_modules != null) {
 307                                 Module[] new_modules = new Module [loaded_modules.Length + 1];
 308                                 System.Array.Copy (loaded_modules, new_modules, loaded_modules.Length);
 309                                 loaded_modules = new_modules;
 310                         } else {
 311                                 loaded_modules = new Module [1];
 312                         }
 313                         loaded_modules [loaded_modules.Length - 1] = m;
 314
 315                         return m;
 316                 }
 317
 318                 public IResourceWriter DefineResource (string name, string description, string fileName)
 319                 {
 320                         return DefineResource (name, description, fileName, ResourceAttributes.Public);
 321                 }
 322
 323                 public IResourceWriter DefineResource (string name, string description,
 324                                                        string fileName, ResourceAttributes attribute)
 325                 {
 326                         IResourceWriter writer;
 327
 328                         // description seems to be ignored
 329                         AddResourceFile (name, fileName, attribute, false);
 330                         writer = new ResourceWriter (fileName);
 331                         if (resource_writers == null)
 332                                 resource_writers = new ArrayList ();
 333                         resource_writers.Add (writer);
 334                         return writer;
 335                 }
 336
 337                 private void AddUnmanagedResource (Win32Resource res) {
 338                         MemoryStream ms = new MemoryStream ();
 339                         res.WriteTo (ms);
 340
 341                         if (win32_resources != null) {
 342                                 MonoWin32Resource[] new_res = new MonoWin32Resource [win32_resources.Length + 1];
 343                                 System.Array.Copy (win32_resources, new_res, win32_resources.Length);
 344                                 win32_resources = new_res;
 345                         }
 346                         else
 347                                 win32_resources = new MonoWin32Resource [1];
 348
 349                         win32_resources [win32_resources.Length - 1] = new MonoWin32Resource (res.Type.Id, res.Name.Id, res.Language, ms.ToArray ());
 350                 }
 351
 352                 [MonoTODO]
 353                 public void DefineUnmanagedResource (byte[] resource)
 354                 {
 355                         if (resource == null)
 356                                 throw new ArgumentNullException ("resource");
 357
 358                         /*
 359                          * The format of the argument byte array is not documented
 360                          * so this method is impossible to implement.
 361                          */
 362
 363                         throw new NotImplementedException ();
 364                 }
 365
 366                 public void DefineUnmanagedResource (string resourceFileName)
 367                 {
 368                         if (resourceFileName == null)
 369                                 throw new ArgumentNullException ("resourceFileName");
 370                         if (resourceFileName == String.Empty)
 371                                 throw new ArgumentException ("resourceFileName");
 372                         if (!File.Exists (resourceFileName) || Directory.Exists (resourceFileName))
 373                                 throw new FileNotFoundException ("File '" + resourceFileName + "' does not exists or is a directory.");
 374
 375                         using (FileStream fs = new FileStream (resourceFileName, FileMode.Open)) {
 376                                 Win32ResFileReader reader = new Win32ResFileReader (fs);
 377
 378                                 foreach (Win32EncodedResource res in reader.ReadResources ()) {
 379                                         if (res.Name.IsName || res.Type.IsName)
 380                                                 throw new InvalidOperationException ("resource files with named resources or non-default resource types are not supported.");
 381
 382                                         AddUnmanagedResource (res);
 383                                 }
 384                         }
 385                 }
 386
 387                 public void DefineVersionInfoResource ()
 388                 {
 389                         if (version_res != null)
 390                                 throw new ArgumentException ("Native resource has already been defined.");
 391
 392                         version_res = new Win32VersionResource (1, 0);
 393
 394                         if (cattrs != null) {
 395                                 foreach (CustomAttributeBuilder cb in cattrs) {
 396                                         string attrname = cb.Ctor.ReflectedType.FullName;
 397
 398                                         if (attrname == "System.Reflection.AssemblyProductAttribute")
 399                                                 version_res.ProductName = cb.string_arg ();
 400                                         else if (attrname == "System.Reflection.AssemblyCompanyAttribute")
 401                                                 version_res.CompanyName = cb.string_arg ();
 402                                         else if (attrname == "System.Reflection.AssemblyCopyrightAttribute")
 403                                                 version_res.LegalCopyright = cb.string_arg ();
 404                                         else if (attrname == "System.Reflection.AssemblyTrademarkAttribute")
 405                                                 version_res.LegalTrademarks = cb.string_arg ();
 406                                         else if (attrname == "System.Reflection.AssemblyCultureAttribute")
 407                                                 version_res.FileLanguage = new CultureInfo (cb.string_arg ()).LCID;
 408                                         else if (attrname == "System.Reflection.AssemblyFileVersionAttribute")
 409                                                 version_res.FileVersion = cb.string_arg ();
 410                                         else if (attrname == "System.Reflection.AssemblyInformationalVersionAttribute")
 411                                                 version_res.ProductVersion = cb.string_arg ();
 412                                         else if (attrname == "System.Reflection.AssemblyTitleAttribute")
 413                                                 version_res.FileDescription = cb.string_arg ();
 414                                         else if (attrname == "System.Reflection.AssemblyDescriptionAttribute")
 415                                                 version_res.Comments = cb.string_arg ();
 416                                 }
 417                         }
 418                 }
 419
 420                 public void DefineVersionInfoResource (string product, string productVersion,
 421                                                        string company, string copyright, string trademark)
 422                 {
 423                         if (version_res != null)
 424                                 throw new ArgumentException ("Native resource has already been defined.");
 425
 426                         /*
 427                          * We can only create the resource later, when the file name and
 428                          * the binary version is known.
 429                          */
 430
 431                         version_res = new Win32VersionResource (1, 0);
 432                         version_res.ProductName = product;
 433                         version_res.ProductVersion = productVersion;
 434                         version_res.CompanyName = company;
 435                         version_res.LegalCopyright = copyright;
 436                         version_res.LegalTrademarks = trademark;
 437                 }
 438
 439                 /*
 440                  * Mono extension to support /win32icon in mcs
 441                  */
 442                 internal void DefineIconResource (string iconFileName)
 443                 {
 444                         if (iconFileName == null)
 445                                 throw new ArgumentNullException ("iconFileName");
 446                         if (iconFileName == String.Empty)
 447                                 throw new ArgumentException ("iconFileName");
 448                         if (!File.Exists (iconFileName) || Directory.Exists (iconFileName))
 449                                 throw new FileNotFoundException ("File '" + iconFileName + "' does not exists or is a directory.");
 450
 451                         using (FileStream fs = new FileStream (iconFileName, FileMode.Open)) {
 452                                 Win32IconFileReader reader = new Win32IconFileReader (fs);
 453
 454                                 ICONDIRENTRY[] entries = reader.ReadIcons ();
 455
 456                                 Win32IconResource[] icons = new Win32IconResource [entries.Length];
 457                                 for (int i = 0; i < entries.Length; ++i) {
 458                                         icons [i] = new Win32IconResource (i + 1, 0, entries [i]);
 459                                         AddUnmanagedResource (icons [i]);
 460                                 }
 461
 462                                 Win32GroupIconResource group = new Win32GroupIconResource (1, 0, icons);
 463                                 AddUnmanagedResource (group);
 464                         }
 465                 }
 466
 467                 private void DefineVersionInfoResourceImpl (string fileName) {
 468                         // Add missing info
 469                         if (version_res.FileVersion == "0.0.0.0")
 470                                 version_res.FileVersion = version;
 471                         version_res.InternalName = Path.GetFileNameWithoutExtension (fileName);
 472                         version_res.OriginalFilename = fileName;
 473
 474                         AddUnmanagedResource (version_res);
 475                 }
 476
 477                 public ModuleBuilder GetDynamicModule (string name)
 478                 {
 479                         if (name == null)
 480                                 throw new ArgumentNullException ("name");
 481                         if (name == "")
 482                                 throw new ArgumentException ("Name can't be null");
 483
 484                         if (modules != null)
 485                                 for (int i = 0; i < modules.Length; ++i)
 486                                         if (modules [i].name == name)
 487                                                 return modules [i];
 488                         return null;
 489                 }
 490
 491                 public override Type[] GetExportedTypes ()
 492                 {
 493                         throw not_supported ();
 494                 }
 495
 496                 public override FileStream GetFile (string name)
 497                 {
 498                         throw not_supported ();
 499                 }
 500
 501                 public override FileStream[] GetFiles(bool getResourceModules) {
 502                         throw not_supported ();
 503                 }
 504
 505                 public override ManifestResourceInfo GetManifestResourceInfo(string resourceName) {
 506                         throw not_supported ();
 507                 }
 508
 509                 public override string[] GetManifestResourceNames() {
 510                         throw not_supported ();
 511                 }
 512
 513                 public override Stream GetManifestResourceStream(string name) {
 514                         throw not_supported ();
 515                 }
 516                 public override Stream GetManifestResourceStream(Type type, string name) {
 517                         throw not_supported ();
 518                 }
 519
 520                 internal bool IsSave {
 521                         get {
 522                                 return access != (uint)AssemblyBuilderAccess.Run;
 523                         }
 524                 }
 525
 526                 internal string AssemblyDir {
 527                         get {
 528                                 return dir;
 529                         }
 530                 }
 531
 532                 /*
 533                  * Mono extension. If this is set, the assembly can only contain one
 534                  * module, access should be Save, and the saved image will not contain an
 535                  * assembly manifest.
 536                  */
 537                 internal bool IsModuleOnly {
 538                         get {
 539                                 return is_module_only;
 540                         }
 541                         set {
 542                                 is_module_only = value;
 543                         }
 544                 }
 545
 546                 public void Save (string assemblyFileName)
 547                 {
 548                         if (resource_writers != null) {
 549                                 foreach (IResourceWriter writer in resource_writers) {
 550                                         writer.Generate ();
 551                                         writer.Close ();
 552                                 }
 553                         }
 554
 555                         // Create a main module if not already created
 556                         ModuleBuilder mainModule = null;
 557                         if (modules != null) {
 558                                 foreach (ModuleBuilder module in modules)
 559                                         if (module.FullyQualifiedName == assemblyFileName)
 560                                                 mainModule = module;
 561                         }
 562                         if (mainModule == null)
 563                                 mainModule = DefineDynamicModule ("RefEmit_OnDiskManifestModule", assemblyFileName);
 564
 565                         if (!is_module_only)
 566                                 mainModule.IsMain = true;
 567
 568                         /*
 569                          * Create a new entry point if the one specified
 570                          * by the user is in another module.
 571                          */
 572                         if ((entry_point != null) && entry_point.DeclaringType.Module != mainModule) {
 573                                 Type[] paramTypes;
 574                                 if (entry_point.GetParameters ().Length == 1)
 575                                         paramTypes = new Type [] { typeof (string) };
 576                                 else
 577                                         paramTypes = new Type [0];
 578
 579                                 MethodBuilder mb = mainModule.DefineGlobalMethod ("__EntryPoint$", MethodAttributes.Static|MethodAttributes.PrivateScope, entry_point.ReturnType, paramTypes);
 580                                 ILGenerator ilgen = mb.GetILGenerator ();
 581                                 if (paramTypes.Length == 1)
 582                                         ilgen.Emit (OpCodes.Ldarg_0);
 583                                 ilgen.Emit (OpCodes.Tailcall);
 584                                 ilgen.Emit (OpCodes.Call, entry_point);
 585                                 ilgen.Emit (OpCodes.Ret);
 586
 587                                 entry_point = mb;
 588                         }
 589
 590                         if (version_res != null)
 591                                 DefineVersionInfoResourceImpl (assemblyFileName);
 592
 593                         if (sn != null) {
 594                                 // runtime needs to value to embed it into the assembly
 595                                 public_key = sn.PublicKey;
 596                         }
 597
 598                         foreach (ModuleBuilder module in modules)
 599                                 if (module != mainModule)
 600                                         module.Save ();
 601
 602                         // Write out the main module at the end, because it needs to
 603                         // contain the hash of the other modules
 604                         mainModule.Save ();
 605
 606                         if ((sn != null) && (sn.CanSign)) {
 607                                 sn.Sign (System.IO.Path.Combine (this.AssemblyDir, assemblyFileName));
 608                         }
 609
 610                         created = true;
 611                 }
 612
 613                 public void SetEntryPoint (MethodInfo entryMethod)
 614                 {
 615                         SetEntryPoint (entryMethod, PEFileKinds.ConsoleApplication);
 616                 }
 617
 618                 public void SetEntryPoint (MethodInfo entryMethod, PEFileKinds fileKind)
 619                 {
 620                         if (entryMethod == null)
 621                                 throw new ArgumentNullException ("entryMethod");
 622                         if (entryMethod.DeclaringType.Assembly != this)
 623                                 throw new InvalidOperationException ("Entry method is not defined in the same assembly.");
 624
 625                         entry_point = entryMethod;
 626                         pekind = fileKind;
 627                 }
 628
 629                 public void SetCustomAttribute( CustomAttributeBuilder customBuilder)
 630                 {
 631                         if (customBuilder == null)
 632                                 throw new ArgumentNullException ("customBuilder");
 633
 634                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 635                         byte[] data;
 636                         int pos;
 637
 638                         if (attrname == "System.Reflection.AssemblyVersionAttribute") {
 639                                 version = create_assembly_version (customBuilder.string_arg ());
 640                                 return;
 641                         } else if (attrname == "System.Reflection.AssemblyCultureAttribute") {
 642                                 culture = customBuilder.string_arg ();
 643                         } else if (attrname == "System.Reflection.AssemblyAlgorithmIdAttribute") {
 644                                 data = customBuilder.Data;
 645                                 pos = 2;
 646                                 algid = (uint)data [pos];
 647                                 algid |= ((uint)data [pos + 1]) << 8;
 648                                 algid |= ((uint)data [pos + 2]) << 16;
 649                                 algid |= ((uint)data [pos + 3]) << 24;
 650                         } else if (attrname == "System.Reflection.AssemblyFlagsAttribute") {
 651                                 data = customBuilder.Data;
 652                                 pos = 2;
 653                                 flags = (uint)data [pos];
 654                                 flags |= ((uint)data [pos + 1]) << 8;
 655                                 flags |= ((uint)data [pos + 2]) << 16;
 656                                 flags |= ((uint)data [pos + 3]) << 24;
 657                                 return;
 658                         }
 659
 660                         if (cattrs != null) {
 661                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 662                                 cattrs.CopyTo (new_array, 0);
 663                                 new_array [cattrs.Length] = customBuilder;
 664                                 cattrs = new_array;
 665                         } else {
 666                                 cattrs = new CustomAttributeBuilder [1];
 667                                 cattrs [0] = customBuilder;
 668                         }
 669                 }
 670
 671                 public void SetCustomAttribute ( ConstructorInfo con, byte[] binaryAttribute) {
 672                         if (con == null)
 673                                 throw new ArgumentNullException ("con");
 674                         if (binaryAttribute == null)
 675                                 throw new ArgumentNullException ("binaryAttribute");
 676
 677                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 678                 }
 679
 680                 internal void SetCorlibTypeBuilders (Type corlib_object_type, Type corlib_value_type, Type corlib_enum_type) {
 681                         this.corlib_object_type = corlib_object_type;
 682                         this.corlib_value_type = corlib_value_type;
 683                         this.corlib_enum_type = corlib_enum_type;
 684                 }
 685
 686                 internal void SetCorlibTypeBuilders (Type corlib_object_type, Type corlib_value_type, Type corlib_enum_type, Type corlib_void_type)
 687                 {
 688                         SetCorlibTypeBuilders (corlib_object_type, corlib_value_type, corlib_enum_type);
 689                         this.corlib_void_type = corlib_void_type;
 690                 }
 691
 692                 private Exception not_supported () {
 693                         // Strange message but this is what MS.NET prints...
 694                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 695                 }
 696
 697                 private void check_name_and_filename (string name, string fileName,
 698                                                                                           bool fileNeedsToExists) {
 699                         if (name == null)
 700                                 throw new ArgumentNullException ("name");
 701                         if (fileName == null)
 702                                 throw new ArgumentNullException ("fileName");
 703                         if (name == "")
 704                                 throw new ArgumentException ("name cannot be empty", "name");
 705                         if (fileName == "")
 706                                 throw new ArgumentException ("fileName cannot be empty", "fileName");
 707                         if (Path.GetFileName (fileName) != fileName)
 708                                 throw new ArgumentException ("fileName '" + fileName + "' must not include a path.");
 709
 710                         // Resource files are created/searched under the assembly storage
 711                         // directory
 712                         string fullFileName = fileName;
 713                         if (dir != null)
 714                                 fullFileName = Path.Combine (dir, fileName);
 715
 716                         if (fileNeedsToExists && !File.Exists (fullFileName))
 717                                 throw new FileNotFoundException ("Could not find file '" + fileName + "'");
 718
 719                         if (resources != null) {
 720                                 for (int i = 0; i < resources.Length; ++i) {
 721                                         if (resources [i].filename == fullFileName)
 722                                                 throw new ArgumentException ("Duplicate file name '" + fileName + "'");
 723                                         if (resources [i].name == name)
 724                                                 throw new ArgumentException ("Duplicate name '" + name + "'");
 725                                 }
 726                         }
 727
 728                         if (modules != null) {
 729                                 for (int i = 0; i < modules.Length; ++i) {
 730                                         // Use fileName instead of fullFileName here
 731                                         if (!modules [i].IsTransient () && (modules [i].FileName == fileName))
 732                                                 throw new ArgumentException ("Duplicate file name '" + fileName + "'");
 733                                         if (modules [i].Name == name)
 734                                                 throw new ArgumentException ("Duplicate name '" + name + "'");
 735                                 }
 736                         }
 737                 }
 738
 739                 private String create_assembly_version (String version) {
 740                         String[] parts = version.Split ('.');
 741                         int[] ver = new int [4] { 0, 0, 0, 0 };
 742
 743                         if ((parts.Length < 0) || (parts.Length > 4))
 744                                 throw new ArgumentException ("The version specified '" + version + "' is invalid");
 745
 746                         for (int i = 0; i < parts.Length; ++i) {
 747                                 if (parts [i] == "*") {
 748                                         DateTime now = DateTime.Now;
 749
 750                                         if (i == 2) {
 751                                                 ver [2] = (now - new DateTime (2000, 1, 1)).Days;
 752                                                 if (parts.Length == 3)
 753                                                         ver [3] = (now.Second + (now.Minute * 60) + (now.Hour * 3600)) / 2;
 754                                         }
 755                                         else
 756                                                 if (i == 3)
 757                                                         ver [3] = (now.Second + (now.Minute * 60) + (now.Hour * 3600)) / 2;
 758                                         else
 759                                                 throw new ArgumentException ("The version specified '" + version + "' is invalid");
 760                                 }
 761                                 else {
 762                                         try {
 763                                                 ver [i] = Int32.Parse (parts [i]);
 764                                         }
 765                                         catch (FormatException) {
 766                                                 throw new ArgumentException ("The version specified '" + version + "' is invalid");
 767                                         }
 768                                 }
 769                         }
 770
 771                         return ver [0] + "." + ver [1] + "." + ver [2] + "." + ver [3];
 772                 }
 773         }
 774 }