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/Mono.Cecil/AssemblyReader.cs

http://github.com/jbevain/cecil
C# | 3887 lines | 2977 code | 897 blank | 13 comment | 599 complexity | d42c832854fc52a9bb4626201d3ae696 MD5 | raw file
  1. //
  2. // Author:
  3. // Jb Evain (jbevain@gmail.com)
  4. //
  5. // Copyright (c) 2008 - 2015 Jb Evain
  6. // Copyright (c) 2008 - 2011 Novell, Inc.
  7. //
  8. // Licensed under the MIT/X11 license.
  9. //
  10. using System;
  11. using System.Collections.Generic;
  12. using System.IO;
  13. using System.IO.Compression;
  14. using System.Text;
  15. using Mono.Collections.Generic;
  16. using Mono.Cecil.Cil;
  17. using Mono.Cecil.Metadata;
  18. using Mono.Cecil.PE;
  19. using RVA = System.UInt32;
  20. namespace Mono.Cecil {
  21. abstract class ModuleReader {
  22. readonly protected ModuleDefinition module;
  23. protected ModuleReader (Image image, ReadingMode mode)
  24. {
  25. this.module = new ModuleDefinition (image);
  26. this.module.ReadingMode = mode;
  27. }
  28. protected abstract void ReadModule ();
  29. public abstract void ReadSymbols (ModuleDefinition module);
  30. protected void ReadModuleManifest (MetadataReader reader)
  31. {
  32. reader.Populate (module);
  33. ReadAssembly (reader);
  34. }
  35. void ReadAssembly (MetadataReader reader)
  36. {
  37. var name = reader.ReadAssemblyNameDefinition ();
  38. if (name == null) {
  39. module.kind = ModuleKind.NetModule;
  40. return;
  41. }
  42. var assembly = new AssemblyDefinition ();
  43. assembly.Name = name;
  44. module.assembly = assembly;
  45. assembly.main_module = module;
  46. }
  47. public static ModuleDefinition CreateModule (Image image, ReaderParameters parameters)
  48. {
  49. var reader = CreateModuleReader (image, parameters.ReadingMode);
  50. var module = reader.module;
  51. if (parameters.assembly_resolver != null)
  52. module.assembly_resolver = Disposable.NotOwned (parameters.assembly_resolver);
  53. if (parameters.metadata_resolver != null)
  54. module.metadata_resolver = parameters.metadata_resolver;
  55. if (parameters.metadata_importer_provider != null)
  56. module.metadata_importer = parameters.metadata_importer_provider.GetMetadataImporter (module);
  57. if (parameters.reflection_importer_provider != null)
  58. module.reflection_importer = parameters.reflection_importer_provider.GetReflectionImporter (module);
  59. GetMetadataKind (module, parameters);
  60. reader.ReadModule ();
  61. ReadSymbols (module, parameters);
  62. reader.ReadSymbols (module);
  63. if (parameters.ReadingMode == ReadingMode.Immediate)
  64. module.MetadataSystem.Clear ();
  65. return module;
  66. }
  67. static void ReadSymbols (ModuleDefinition module, ReaderParameters parameters)
  68. {
  69. var symbol_reader_provider = parameters.SymbolReaderProvider;
  70. if (symbol_reader_provider == null && parameters.ReadSymbols)
  71. symbol_reader_provider = new DefaultSymbolReaderProvider ();
  72. if (symbol_reader_provider != null) {
  73. module.SymbolReaderProvider = symbol_reader_provider;
  74. var reader = parameters.SymbolStream != null
  75. ? symbol_reader_provider.GetSymbolReader (module, parameters.SymbolStream)
  76. : symbol_reader_provider.GetSymbolReader (module, module.FileName);
  77. if (reader != null) {
  78. try {
  79. module.ReadSymbols (reader, parameters.ThrowIfSymbolsAreNotMatching);
  80. } catch (Exception) {
  81. reader.Dispose ();
  82. throw;
  83. }
  84. }
  85. }
  86. if (module.Image.HasDebugTables ())
  87. module.ReadSymbols (new PortablePdbReader (module.Image, module));
  88. }
  89. static void GetMetadataKind (ModuleDefinition module, ReaderParameters parameters)
  90. {
  91. if (!parameters.ApplyWindowsRuntimeProjections) {
  92. module.MetadataKind = MetadataKind.Ecma335;
  93. return;
  94. }
  95. var runtime_version = module.RuntimeVersion;
  96. if (!runtime_version.Contains ("WindowsRuntime"))
  97. module.MetadataKind = MetadataKind.Ecma335;
  98. else if (runtime_version.Contains ("CLR"))
  99. module.MetadataKind = MetadataKind.ManagedWindowsMetadata;
  100. else
  101. module.MetadataKind = MetadataKind.WindowsMetadata;
  102. }
  103. static ModuleReader CreateModuleReader (Image image, ReadingMode mode)
  104. {
  105. switch (mode) {
  106. case ReadingMode.Immediate:
  107. return new ImmediateModuleReader (image);
  108. case ReadingMode.Deferred:
  109. return new DeferredModuleReader (image);
  110. default:
  111. throw new ArgumentException ();
  112. }
  113. }
  114. }
  115. sealed class ImmediateModuleReader : ModuleReader {
  116. bool resolve_attributes;
  117. public ImmediateModuleReader (Image image)
  118. : base (image, ReadingMode.Immediate)
  119. {
  120. }
  121. protected override void ReadModule ()
  122. {
  123. this.module.Read (this.module, (module, reader) => {
  124. ReadModuleManifest (reader);
  125. ReadModule (module, resolve_attributes: true);
  126. });
  127. }
  128. public void ReadModule (ModuleDefinition module, bool resolve_attributes)
  129. {
  130. this.resolve_attributes = resolve_attributes;
  131. if (module.HasAssemblyReferences)
  132. Mixin.Read (module.AssemblyReferences);
  133. if (module.HasResources)
  134. Mixin.Read (module.Resources);
  135. if (module.HasModuleReferences)
  136. Mixin.Read (module.ModuleReferences);
  137. if (module.HasTypes)
  138. ReadTypes (module.Types);
  139. if (module.HasExportedTypes)
  140. Mixin.Read (module.ExportedTypes);
  141. ReadCustomAttributes (module);
  142. var assembly = module.Assembly;
  143. if (assembly == null)
  144. return;
  145. ReadCustomAttributes (assembly);
  146. ReadSecurityDeclarations (assembly);
  147. }
  148. void ReadTypes (Collection<TypeDefinition> types)
  149. {
  150. for (int i = 0; i < types.Count; i++)
  151. ReadType (types [i]);
  152. }
  153. void ReadType (TypeDefinition type)
  154. {
  155. ReadGenericParameters (type);
  156. if (type.HasInterfaces)
  157. ReadInterfaces (type);
  158. if (type.HasNestedTypes)
  159. ReadTypes (type.NestedTypes);
  160. if (type.HasLayoutInfo)
  161. Mixin.Read (type.ClassSize);
  162. if (type.HasFields)
  163. ReadFields (type);
  164. if (type.HasMethods)
  165. ReadMethods (type);
  166. if (type.HasProperties)
  167. ReadProperties (type);
  168. if (type.HasEvents)
  169. ReadEvents (type);
  170. ReadSecurityDeclarations (type);
  171. ReadCustomAttributes (type);
  172. }
  173. void ReadInterfaces (TypeDefinition type)
  174. {
  175. var interfaces = type.Interfaces;
  176. for (int i = 0; i < interfaces.Count; i++)
  177. ReadCustomAttributes (interfaces [i]);
  178. }
  179. void ReadGenericParameters (IGenericParameterProvider provider)
  180. {
  181. if (!provider.HasGenericParameters)
  182. return;
  183. var parameters = provider.GenericParameters;
  184. for (int i = 0; i < parameters.Count; i++) {
  185. var parameter = parameters [i];
  186. if (parameter.HasConstraints)
  187. ReadGenericParameterConstraints (parameter);
  188. ReadCustomAttributes (parameter);
  189. }
  190. }
  191. void ReadGenericParameterConstraints (GenericParameter parameter)
  192. {
  193. var constraints = parameter.Constraints;
  194. for (int i = 0; i < constraints.Count; i++)
  195. ReadCustomAttributes (constraints [i]);
  196. }
  197. void ReadSecurityDeclarations (ISecurityDeclarationProvider provider)
  198. {
  199. if (!provider.HasSecurityDeclarations)
  200. return;
  201. var security_declarations = provider.SecurityDeclarations;
  202. if (!resolve_attributes)
  203. return;
  204. for (int i = 0; i < security_declarations.Count; i++) {
  205. var security_declaration = security_declarations [i];
  206. Mixin.Read (security_declaration.SecurityAttributes);
  207. }
  208. }
  209. void ReadCustomAttributes (ICustomAttributeProvider provider)
  210. {
  211. if (!provider.HasCustomAttributes)
  212. return;
  213. var custom_attributes = provider.CustomAttributes;
  214. if (!resolve_attributes)
  215. return;
  216. for (int i = 0; i < custom_attributes.Count; i++) {
  217. var custom_attribute = custom_attributes [i];
  218. Mixin.Read (custom_attribute.ConstructorArguments);
  219. }
  220. }
  221. void ReadFields (TypeDefinition type)
  222. {
  223. var fields = type.Fields;
  224. for (int i = 0; i < fields.Count; i++) {
  225. var field = fields [i];
  226. if (field.HasConstant)
  227. Mixin.Read (field.Constant);
  228. if (field.HasLayoutInfo)
  229. Mixin.Read (field.Offset);
  230. if (field.RVA > 0)
  231. Mixin.Read (field.InitialValue);
  232. if (field.HasMarshalInfo)
  233. Mixin.Read (field.MarshalInfo);
  234. ReadCustomAttributes (field);
  235. }
  236. }
  237. void ReadMethods (TypeDefinition type)
  238. {
  239. var methods = type.Methods;
  240. for (int i = 0; i < methods.Count; i++) {
  241. var method = methods [i];
  242. ReadGenericParameters (method);
  243. if (method.HasParameters)
  244. ReadParameters (method);
  245. if (method.HasOverrides)
  246. Mixin.Read (method.Overrides);
  247. if (method.IsPInvokeImpl)
  248. Mixin.Read (method.PInvokeInfo);
  249. ReadSecurityDeclarations (method);
  250. ReadCustomAttributes (method);
  251. var return_type = method.MethodReturnType;
  252. if (return_type.HasConstant)
  253. Mixin.Read (return_type.Constant);
  254. if (return_type.HasMarshalInfo)
  255. Mixin.Read (return_type.MarshalInfo);
  256. ReadCustomAttributes (return_type);
  257. }
  258. }
  259. void ReadParameters (MethodDefinition method)
  260. {
  261. var parameters = method.Parameters;
  262. for (int i = 0; i < parameters.Count; i++) {
  263. var parameter = parameters [i];
  264. if (parameter.HasConstant)
  265. Mixin.Read (parameter.Constant);
  266. if (parameter.HasMarshalInfo)
  267. Mixin.Read (parameter.MarshalInfo);
  268. ReadCustomAttributes (parameter);
  269. }
  270. }
  271. void ReadProperties (TypeDefinition type)
  272. {
  273. var properties = type.Properties;
  274. for (int i = 0; i < properties.Count; i++) {
  275. var property = properties [i];
  276. Mixin.Read (property.GetMethod);
  277. if (property.HasConstant)
  278. Mixin.Read (property.Constant);
  279. ReadCustomAttributes (property);
  280. }
  281. }
  282. void ReadEvents (TypeDefinition type)
  283. {
  284. var events = type.Events;
  285. for (int i = 0; i < events.Count; i++) {
  286. var @event = events [i];
  287. Mixin.Read (@event.AddMethod);
  288. ReadCustomAttributes (@event);
  289. }
  290. }
  291. public override void ReadSymbols (ModuleDefinition module)
  292. {
  293. if (module.symbol_reader == null)
  294. return;
  295. ReadTypesSymbols (module.Types, module.symbol_reader);
  296. }
  297. void ReadTypesSymbols (Collection<TypeDefinition> types, ISymbolReader symbol_reader)
  298. {
  299. for (int i = 0; i < types.Count; i++) {
  300. var type = types [i];
  301. if (type.HasNestedTypes)
  302. ReadTypesSymbols (type.NestedTypes, symbol_reader);
  303. if (type.HasMethods)
  304. ReadMethodsSymbols (type, symbol_reader);
  305. }
  306. }
  307. void ReadMethodsSymbols (TypeDefinition type, ISymbolReader symbol_reader)
  308. {
  309. var methods = type.Methods;
  310. for (int i = 0; i < methods.Count; i++) {
  311. var method = methods [i];
  312. if (method.HasBody && method.token.RID != 0 && method.debug_info == null)
  313. method.debug_info = symbol_reader.Read (method);
  314. }
  315. }
  316. }
  317. sealed class DeferredModuleReader : ModuleReader {
  318. public DeferredModuleReader (Image image)
  319. : base (image, ReadingMode.Deferred)
  320. {
  321. }
  322. protected override void ReadModule ()
  323. {
  324. this.module.Read (this.module, (_, reader) => ReadModuleManifest (reader));
  325. }
  326. public override void ReadSymbols (ModuleDefinition module)
  327. {
  328. }
  329. }
  330. sealed class MetadataReader : ByteBuffer {
  331. readonly internal Image image;
  332. readonly internal ModuleDefinition module;
  333. readonly internal MetadataSystem metadata;
  334. internal CodeReader code;
  335. internal IGenericContext context;
  336. readonly MetadataReader metadata_reader;
  337. public MetadataReader (ModuleDefinition module)
  338. : base (module.Image.TableHeap.data)
  339. {
  340. this.image = module.Image;
  341. this.module = module;
  342. this.metadata = module.MetadataSystem;
  343. this.code = new CodeReader (this);
  344. }
  345. public MetadataReader (Image image, ModuleDefinition module, MetadataReader metadata_reader)
  346. : base (image.TableHeap.data)
  347. {
  348. this.image = image;
  349. this.module = module;
  350. this.metadata = module.MetadataSystem;
  351. this.metadata_reader = metadata_reader;
  352. }
  353. int GetCodedIndexSize (CodedIndex index)
  354. {
  355. return image.GetCodedIndexSize (index);
  356. }
  357. uint ReadByIndexSize (int size)
  358. {
  359. if (size == 4)
  360. return ReadUInt32 ();
  361. else
  362. return ReadUInt16 ();
  363. }
  364. byte [] ReadBlob ()
  365. {
  366. var blob_heap = image.BlobHeap;
  367. if (blob_heap == null) {
  368. position += 2;
  369. return Empty<byte>.Array;
  370. }
  371. return blob_heap.Read (ReadBlobIndex ());
  372. }
  373. byte [] ReadBlob (uint signature)
  374. {
  375. var blob_heap = image.BlobHeap;
  376. if (blob_heap == null)
  377. return Empty<byte>.Array;
  378. return blob_heap.Read (signature);
  379. }
  380. uint ReadBlobIndex ()
  381. {
  382. var blob_heap = image.BlobHeap;
  383. return ReadByIndexSize (blob_heap != null ? blob_heap.IndexSize : 2);
  384. }
  385. void GetBlobView (uint signature, out byte [] blob, out int index, out int count)
  386. {
  387. var blob_heap = image.BlobHeap;
  388. if (blob_heap == null) {
  389. blob = null;
  390. index = count = 0;
  391. return;
  392. }
  393. blob_heap.GetView (signature, out blob, out index, out count);
  394. }
  395. string ReadString ()
  396. {
  397. return image.StringHeap.Read (ReadByIndexSize (image.StringHeap.IndexSize));
  398. }
  399. uint ReadStringIndex ()
  400. {
  401. return ReadByIndexSize (image.StringHeap.IndexSize);
  402. }
  403. Guid ReadGuid ()
  404. {
  405. return image.GuidHeap.Read (ReadByIndexSize (image.GuidHeap.IndexSize));
  406. }
  407. uint ReadTableIndex (Table table)
  408. {
  409. return ReadByIndexSize (image.GetTableIndexSize (table));
  410. }
  411. MetadataToken ReadMetadataToken (CodedIndex index)
  412. {
  413. return index.GetMetadataToken (ReadByIndexSize (GetCodedIndexSize (index)));
  414. }
  415. int MoveTo (Table table)
  416. {
  417. var info = image.TableHeap [table];
  418. if (info.Length != 0)
  419. this.position = (int) info.Offset;
  420. return (int) info.Length;
  421. }
  422. bool MoveTo (Table table, uint row)
  423. {
  424. var info = image.TableHeap [table];
  425. var length = info.Length;
  426. if (length == 0 || row > length)
  427. return false;
  428. this.position = (int) (info.Offset + (info.RowSize * (row - 1)));
  429. return true;
  430. }
  431. public AssemblyNameDefinition ReadAssemblyNameDefinition ()
  432. {
  433. if (MoveTo (Table.Assembly) == 0)
  434. return null;
  435. var name = new AssemblyNameDefinition ();
  436. name.HashAlgorithm = (AssemblyHashAlgorithm) ReadUInt32 ();
  437. PopulateVersionAndFlags (name);
  438. name.PublicKey = ReadBlob ();
  439. PopulateNameAndCulture (name);
  440. return name;
  441. }
  442. public ModuleDefinition Populate (ModuleDefinition module)
  443. {
  444. if (MoveTo (Table.Module) == 0)
  445. return module;
  446. Advance (2); // Generation
  447. module.Name = ReadString ();
  448. module.Mvid = ReadGuid ();
  449. return module;
  450. }
  451. void InitializeAssemblyReferences ()
  452. {
  453. if (metadata.AssemblyReferences != null)
  454. return;
  455. int length = MoveTo (Table.AssemblyRef);
  456. var references = metadata.AssemblyReferences = new AssemblyNameReference [length];
  457. for (uint i = 0; i < length; i++) {
  458. var reference = new AssemblyNameReference ();
  459. reference.token = new MetadataToken (TokenType.AssemblyRef, i + 1);
  460. PopulateVersionAndFlags (reference);
  461. var key_or_token = ReadBlob ();
  462. if (reference.HasPublicKey)
  463. reference.PublicKey = key_or_token;
  464. else
  465. reference.PublicKeyToken = key_or_token;
  466. PopulateNameAndCulture (reference);
  467. reference.Hash = ReadBlob ();
  468. references [i] = reference;
  469. }
  470. }
  471. public Collection<AssemblyNameReference> ReadAssemblyReferences ()
  472. {
  473. InitializeAssemblyReferences ();
  474. var references = new Collection<AssemblyNameReference> (metadata.AssemblyReferences);
  475. if (module.IsWindowsMetadata ())
  476. module.Projections.AddVirtualReferences (references);
  477. return references;
  478. }
  479. public MethodDefinition ReadEntryPoint ()
  480. {
  481. if (module.Image.EntryPointToken == 0)
  482. return null;
  483. var token = new MetadataToken (module.Image.EntryPointToken);
  484. return GetMethodDefinition (token.RID);
  485. }
  486. public Collection<ModuleDefinition> ReadModules ()
  487. {
  488. var modules = new Collection<ModuleDefinition> (1);
  489. modules.Add (this.module);
  490. int length = MoveTo (Table.File);
  491. for (uint i = 1; i <= length; i++) {
  492. var attributes = (FileAttributes) ReadUInt32 ();
  493. var name = ReadString ();
  494. ReadBlobIndex ();
  495. if (attributes != FileAttributes.ContainsMetaData)
  496. continue;
  497. var parameters = new ReaderParameters {
  498. ReadingMode = module.ReadingMode,
  499. SymbolReaderProvider = module.SymbolReaderProvider,
  500. AssemblyResolver = module.AssemblyResolver
  501. };
  502. modules.Add (ModuleDefinition.ReadModule (
  503. GetModuleFileName (name), parameters));
  504. }
  505. return modules;
  506. }
  507. string GetModuleFileName (string name)
  508. {
  509. if (module.FileName == null)
  510. throw new NotSupportedException ();
  511. var path = Path.GetDirectoryName (module.FileName);
  512. return Path.Combine (path, name);
  513. }
  514. void InitializeModuleReferences ()
  515. {
  516. if (metadata.ModuleReferences != null)
  517. return;
  518. int length = MoveTo (Table.ModuleRef);
  519. var references = metadata.ModuleReferences = new ModuleReference [length];
  520. for (uint i = 0; i < length; i++) {
  521. var reference = new ModuleReference (ReadString ());
  522. reference.token = new MetadataToken (TokenType.ModuleRef, i + 1);
  523. references [i] = reference;
  524. }
  525. }
  526. public Collection<ModuleReference> ReadModuleReferences ()
  527. {
  528. InitializeModuleReferences ();
  529. return new Collection<ModuleReference> (metadata.ModuleReferences);
  530. }
  531. public bool HasFileResource ()
  532. {
  533. int length = MoveTo (Table.File);
  534. if (length == 0)
  535. return false;
  536. for (uint i = 1; i <= length; i++)
  537. if (ReadFileRecord (i).Col1 == FileAttributes.ContainsNoMetaData)
  538. return true;
  539. return false;
  540. }
  541. public Collection<Resource> ReadResources ()
  542. {
  543. int length = MoveTo (Table.ManifestResource);
  544. var resources = new Collection<Resource> (length);
  545. for (int i = 1; i <= length; i++) {
  546. var offset = ReadUInt32 ();
  547. var flags = (ManifestResourceAttributes) ReadUInt32 ();
  548. var name = ReadString ();
  549. var implementation = ReadMetadataToken (CodedIndex.Implementation);
  550. Resource resource;
  551. if (implementation.RID == 0) {
  552. resource = new EmbeddedResource (name, flags, offset, this);
  553. } else if (implementation.TokenType == TokenType.AssemblyRef) {
  554. resource = new AssemblyLinkedResource (name, flags) {
  555. Assembly = (AssemblyNameReference) GetTypeReferenceScope (implementation),
  556. };
  557. } else if (implementation.TokenType == TokenType.File) {
  558. var file_record = ReadFileRecord (implementation.RID);
  559. resource = new LinkedResource (name, flags) {
  560. File = file_record.Col2,
  561. hash = ReadBlob (file_record.Col3)
  562. };
  563. } else
  564. continue;
  565. resources.Add (resource);
  566. }
  567. return resources;
  568. }
  569. Row<FileAttributes, string, uint> ReadFileRecord (uint rid)
  570. {
  571. var position = this.position;
  572. if (!MoveTo (Table.File, rid))
  573. throw new ArgumentException ();
  574. var record = new Row<FileAttributes, string, uint> (
  575. (FileAttributes) ReadUInt32 (),
  576. ReadString (),
  577. ReadBlobIndex ());
  578. this.position = position;
  579. return record;
  580. }
  581. public byte [] GetManagedResource (uint offset)
  582. {
  583. return image.GetReaderAt (image.Resources.VirtualAddress, offset, (o, reader) => {
  584. reader.Advance ((int) o);
  585. return reader.ReadBytes (reader.ReadInt32 ());
  586. }) ?? Empty<byte>.Array;
  587. }
  588. void PopulateVersionAndFlags (AssemblyNameReference name)
  589. {
  590. name.Version = new Version (
  591. ReadUInt16 (),
  592. ReadUInt16 (),
  593. ReadUInt16 (),
  594. ReadUInt16 ());
  595. name.Attributes = (AssemblyAttributes) ReadUInt32 ();
  596. }
  597. void PopulateNameAndCulture (AssemblyNameReference name)
  598. {
  599. name.Name = ReadString ();
  600. name.Culture = ReadString ();
  601. }
  602. public TypeDefinitionCollection ReadTypes ()
  603. {
  604. InitializeTypeDefinitions ();
  605. var mtypes = metadata.Types;
  606. var type_count = mtypes.Length - metadata.NestedTypes.Count;
  607. var types = new TypeDefinitionCollection (module, type_count);
  608. for (int i = 0; i < mtypes.Length; i++) {
  609. var type = mtypes [i];
  610. if (IsNested (type.Attributes))
  611. continue;
  612. types.Add (type);
  613. }
  614. if (image.HasTable (Table.MethodPtr) || image.HasTable (Table.FieldPtr))
  615. CompleteTypes ();
  616. return types;
  617. }
  618. void CompleteTypes ()
  619. {
  620. var types = metadata.Types;
  621. for (int i = 0; i < types.Length; i++) {
  622. var type = types [i];
  623. Mixin.Read (type.Fields);
  624. Mixin.Read (type.Methods);
  625. }
  626. }
  627. void InitializeTypeDefinitions ()
  628. {
  629. if (metadata.Types != null)
  630. return;
  631. InitializeNestedTypes ();
  632. InitializeFields ();
  633. InitializeMethods ();
  634. int length = MoveTo (Table.TypeDef);
  635. var types = metadata.Types = new TypeDefinition [length];
  636. for (uint i = 0; i < length; i++) {
  637. if (types [i] != null)
  638. continue;
  639. types [i] = ReadType (i + 1);
  640. }
  641. if (module.IsWindowsMetadata ()) {
  642. for (uint i = 0; i < length; i++) {
  643. WindowsRuntimeProjections.Project (types [i]);
  644. }
  645. }
  646. }
  647. static bool IsNested (TypeAttributes attributes)
  648. {
  649. switch (attributes & TypeAttributes.VisibilityMask) {
  650. case TypeAttributes.NestedAssembly:
  651. case TypeAttributes.NestedFamANDAssem:
  652. case TypeAttributes.NestedFamily:
  653. case TypeAttributes.NestedFamORAssem:
  654. case TypeAttributes.NestedPrivate:
  655. case TypeAttributes.NestedPublic:
  656. return true;
  657. default:
  658. return false;
  659. }
  660. }
  661. public bool HasNestedTypes (TypeDefinition type)
  662. {
  663. Collection<uint> mapping;
  664. InitializeNestedTypes ();
  665. if (!metadata.TryGetNestedTypeMapping (type, out mapping))
  666. return false;
  667. return mapping.Count > 0;
  668. }
  669. public Collection<TypeDefinition> ReadNestedTypes (TypeDefinition type)
  670. {
  671. InitializeNestedTypes ();
  672. Collection<uint> mapping;
  673. if (!metadata.TryGetNestedTypeMapping (type, out mapping))
  674. return new MemberDefinitionCollection<TypeDefinition> (type);
  675. var nested_types = new MemberDefinitionCollection<TypeDefinition> (type, mapping.Count);
  676. for (int i = 0; i < mapping.Count; i++) {
  677. var nested_type = GetTypeDefinition (mapping [i]);
  678. if (nested_type != null)
  679. nested_types.Add (nested_type);
  680. }
  681. metadata.RemoveNestedTypeMapping (type);
  682. return nested_types;
  683. }
  684. void InitializeNestedTypes ()
  685. {
  686. if (metadata.NestedTypes != null)
  687. return;
  688. var length = MoveTo (Table.NestedClass);
  689. metadata.NestedTypes = new Dictionary<uint, Collection<uint>> (length);
  690. metadata.ReverseNestedTypes = new Dictionary<uint, uint> (length);
  691. if (length == 0)
  692. return;
  693. for (int i = 1; i <= length; i++) {
  694. var nested = ReadTableIndex (Table.TypeDef);
  695. var declaring = ReadTableIndex (Table.TypeDef);
  696. AddNestedMapping (declaring, nested);
  697. }
  698. }
  699. void AddNestedMapping (uint declaring, uint nested)
  700. {
  701. metadata.SetNestedTypeMapping (declaring, AddMapping (metadata.NestedTypes, declaring, nested));
  702. metadata.SetReverseNestedTypeMapping (nested, declaring);
  703. }
  704. static Collection<TValue> AddMapping<TKey, TValue> (Dictionary<TKey, Collection<TValue>> cache, TKey key, TValue value)
  705. {
  706. Collection<TValue> mapped;
  707. if (!cache.TryGetValue (key, out mapped)) {
  708. mapped = new Collection<TValue> ();
  709. }
  710. mapped.Add (value);
  711. return mapped;
  712. }
  713. TypeDefinition ReadType (uint rid)
  714. {
  715. if (!MoveTo (Table.TypeDef, rid))
  716. return null;
  717. var attributes = (TypeAttributes) ReadUInt32 ();
  718. var name = ReadString ();
  719. var @namespace = ReadString ();
  720. var type = new TypeDefinition (@namespace, name, attributes);
  721. type.token = new MetadataToken (TokenType.TypeDef, rid);
  722. type.scope = module;
  723. type.module = module;
  724. metadata.AddTypeDefinition (type);
  725. this.context = type;
  726. type.BaseType = GetTypeDefOrRef (ReadMetadataToken (CodedIndex.TypeDefOrRef));
  727. type.fields_range = ReadListRange (rid, Table.TypeDef, Table.Field);
  728. type.methods_range = ReadListRange (rid, Table.TypeDef, Table.Method);
  729. if (IsNested (attributes))
  730. type.DeclaringType = GetNestedTypeDeclaringType (type);
  731. return type;
  732. }
  733. TypeDefinition GetNestedTypeDeclaringType (TypeDefinition type)
  734. {
  735. uint declaring_rid;
  736. if (!metadata.TryGetReverseNestedTypeMapping (type, out declaring_rid))
  737. return null;
  738. metadata.RemoveReverseNestedTypeMapping (type);
  739. return GetTypeDefinition (declaring_rid);
  740. }
  741. Range ReadListRange (uint current_index, Table current, Table target)
  742. {
  743. var list = new Range ();
  744. var start = ReadTableIndex (target);
  745. if (start == 0)
  746. return list;
  747. uint next_index;
  748. var current_table = image.TableHeap [current];
  749. if (current_index == current_table.Length)
  750. next_index = image.TableHeap [target].Length + 1;
  751. else {
  752. var position = this.position;
  753. this.position += (int) (current_table.RowSize - image.GetTableIndexSize (target));
  754. next_index = ReadTableIndex (target);
  755. this.position = position;
  756. }
  757. list.Start = start;
  758. list.Length = next_index - start;
  759. return list;
  760. }
  761. public Row<short, int> ReadTypeLayout (TypeDefinition type)
  762. {
  763. InitializeTypeLayouts ();
  764. Row<ushort, uint> class_layout;
  765. var rid = type.token.RID;
  766. if (!metadata.ClassLayouts.TryGetValue (rid, out class_layout))
  767. return new Row<short, int> (Mixin.NoDataMarker, Mixin.NoDataMarker);
  768. type.PackingSize = (short) class_layout.Col1;
  769. type.ClassSize = (int) class_layout.Col2;
  770. metadata.ClassLayouts.Remove (rid);
  771. return new Row<short, int> ((short) class_layout.Col1, (int) class_layout.Col2);
  772. }
  773. void InitializeTypeLayouts ()
  774. {
  775. if (metadata.ClassLayouts != null)
  776. return;
  777. int length = MoveTo (Table.ClassLayout);
  778. var class_layouts = metadata.ClassLayouts = new Dictionary<uint, Row<ushort, uint>> (length);
  779. for (uint i = 0; i < length; i++) {
  780. var packing_size = ReadUInt16 ();
  781. var class_size = ReadUInt32 ();
  782. var parent = ReadTableIndex (Table.TypeDef);
  783. class_layouts.Add (parent, new Row<ushort, uint> (packing_size, class_size));
  784. }
  785. }
  786. public TypeReference GetTypeDefOrRef (MetadataToken token)
  787. {
  788. return (TypeReference) LookupToken (token);
  789. }
  790. public TypeDefinition GetTypeDefinition (uint rid)
  791. {
  792. InitializeTypeDefinitions ();
  793. var type = metadata.GetTypeDefinition (rid);
  794. if (type != null)
  795. return type;
  796. type = ReadTypeDefinition (rid);
  797. if (module.IsWindowsMetadata ())
  798. WindowsRuntimeProjections.Project (type);
  799. return type;
  800. }
  801. TypeDefinition ReadTypeDefinition (uint rid)
  802. {
  803. if (!MoveTo (Table.TypeDef, rid))
  804. return null;
  805. return ReadType (rid);
  806. }
  807. void InitializeTypeReferences ()
  808. {
  809. if (metadata.TypeReferences != null)
  810. return;
  811. metadata.TypeReferences = new TypeReference [image.GetTableLength (Table.TypeRef)];
  812. }
  813. public TypeReference GetTypeReference (string scope, string full_name)
  814. {
  815. InitializeTypeReferences ();
  816. var length = metadata.TypeReferences.Length;
  817. for (uint i = 1; i <= length; i++) {
  818. var type = GetTypeReference (i);
  819. if (type.FullName != full_name)
  820. continue;
  821. if (string.IsNullOrEmpty (scope))
  822. return type;
  823. if (type.Scope.Name == scope)
  824. return type;
  825. }
  826. return null;
  827. }
  828. TypeReference GetTypeReference (uint rid)
  829. {
  830. InitializeTypeReferences ();
  831. var type = metadata.GetTypeReference (rid);
  832. if (type != null)
  833. return type;
  834. return ReadTypeReference (rid);
  835. }
  836. TypeReference ReadTypeReference (uint rid)
  837. {
  838. if (!MoveTo (Table.TypeRef, rid))
  839. return null;
  840. TypeReference declaring_type = null;
  841. IMetadataScope scope;
  842. var scope_token = ReadMetadataToken (CodedIndex.ResolutionScope);
  843. var name = ReadString ();
  844. var @namespace = ReadString ();
  845. var type = new TypeReference (
  846. @namespace,
  847. name,
  848. module,
  849. null);
  850. type.token = new MetadataToken (TokenType.TypeRef, rid);
  851. metadata.AddTypeReference (type);
  852. if (scope_token.TokenType == TokenType.TypeRef) {
  853. if (scope_token.RID != rid) {
  854. declaring_type = GetTypeDefOrRef (scope_token);
  855. scope = declaring_type != null
  856. ? declaring_type.Scope
  857. : module;
  858. } else // obfuscated typeref row pointing to self
  859. scope = module;
  860. } else
  861. scope = GetTypeReferenceScope (scope_token);
  862. type.scope = scope;
  863. type.DeclaringType = declaring_type;
  864. MetadataSystem.TryProcessPrimitiveTypeReference (type);
  865. if (type.Module.IsWindowsMetadata ())
  866. WindowsRuntimeProjections.Project (type);
  867. return type;
  868. }
  869. IMetadataScope GetTypeReferenceScope (MetadataToken scope)
  870. {
  871. if (scope.TokenType == TokenType.Module)
  872. return module;
  873. IMetadataScope[] scopes;
  874. switch (scope.TokenType) {
  875. case TokenType.AssemblyRef:
  876. InitializeAssemblyReferences ();
  877. scopes = metadata.AssemblyReferences;
  878. break;
  879. case TokenType.ModuleRef:
  880. InitializeModuleReferences ();
  881. scopes = metadata.ModuleReferences;
  882. break;
  883. default:
  884. throw new NotSupportedException ();
  885. }
  886. var index = scope.RID - 1;
  887. if (index < 0 || index >= scopes.Length)
  888. return null;
  889. return scopes [index];
  890. }
  891. public IEnumerable<TypeReference> GetTypeReferences ()
  892. {
  893. InitializeTypeReferences ();
  894. var length = image.GetTableLength (Table.TypeRef);
  895. var type_references = new TypeReference [length];
  896. for (uint i = 1; i <= length; i++)
  897. type_references [i - 1] = GetTypeReference (i);
  898. return type_references;
  899. }
  900. TypeReference GetTypeSpecification (uint rid)
  901. {
  902. if (!MoveTo (Table.TypeSpec, rid))
  903. return null;
  904. var reader = ReadSignature (ReadBlobIndex ());
  905. var type = reader.ReadTypeSignature ();
  906. if (type.token.RID == 0)
  907. type.token = new MetadataToken (TokenType.TypeSpec, rid);
  908. return type;
  909. }
  910. SignatureReader ReadSignature (uint signature)
  911. {
  912. return new SignatureReader (signature, this);
  913. }
  914. public bool HasInterfaces (TypeDefinition type)
  915. {
  916. InitializeInterfaces ();
  917. Collection<Row<uint, MetadataToken>> mapping;
  918. return metadata.TryGetInterfaceMapping (type, out mapping);
  919. }
  920. public InterfaceImplementationCollection ReadInterfaces (TypeDefinition type)
  921. {
  922. InitializeInterfaces ();
  923. Collection<Row<uint, MetadataToken>> mapping;
  924. if (!metadata.TryGetInterfaceMapping (type, out mapping))
  925. return new InterfaceImplementationCollection (type);
  926. var interfaces = new InterfaceImplementationCollection (type, mapping.Count);
  927. this.context = type;
  928. for (int i = 0; i < mapping.Count; i++) {
  929. interfaces.Add (
  930. new InterfaceImplementation (
  931. GetTypeDefOrRef (mapping [i].Col2),
  932. new MetadataToken(TokenType.InterfaceImpl, mapping [i].Col1)));
  933. }
  934. metadata.RemoveInterfaceMapping (type);
  935. return interfaces;
  936. }
  937. void InitializeInterfaces ()
  938. {
  939. if (metadata.Interfaces != null)
  940. return;
  941. int length = MoveTo (Table.InterfaceImpl);
  942. metadata.Interfaces = new Dictionary<uint, Collection<Row<uint, MetadataToken>>> (length);
  943. for (uint i = 1; i <= length; i++) {
  944. var type = ReadTableIndex (Table.TypeDef);
  945. var @interface = ReadMetadataToken (CodedIndex.TypeDefOrRef);
  946. AddInterfaceMapping (type, new Row<uint, MetadataToken> (i, @interface));
  947. }
  948. }
  949. void AddInterfaceMapping (uint type, Row<uint, MetadataToken> @interface)
  950. {
  951. metadata.SetInterfaceMapping (type, AddMapping (metadata.Interfaces, type, @interface));
  952. }
  953. public Collection<FieldDefinition> ReadFields (TypeDefinition type)
  954. {
  955. var fields_range = type.fields_range;
  956. if (fields_range.Length == 0)
  957. return new MemberDefinitionCollection<FieldDefinition> (type);
  958. var fields = new MemberDefinitionCollection<FieldDefinition> (type, (int) fields_range.Length);
  959. this.context = type;
  960. if (!MoveTo (Table.FieldPtr, fields_range.Start)) {
  961. if (!MoveTo (Table.Field, fields_range.Start))
  962. return fields;
  963. for (uint i = 0; i < fields_range.Length; i++)
  964. ReadField (fields_range.Start + i, fields);
  965. } else
  966. ReadPointers (Table.FieldPtr, Table.Field, fields_range, fields, ReadField);
  967. return fields;
  968. }
  969. void ReadField (uint field_rid, Collection<FieldDefinition> fields)
  970. {
  971. var attributes = (FieldAttributes) ReadUInt16 ();
  972. var name = ReadString ();
  973. var signature = ReadBlobIndex ();
  974. var field = new FieldDefinition (name, attributes, ReadFieldType (signature));
  975. field.token = new MetadataToken (TokenType.Field, field_rid);
  976. metadata.AddFieldDefinition (field);
  977. if (IsDeleted (field))
  978. return;
  979. fields.Add (field);
  980. if (module.IsWindowsMetadata ())
  981. WindowsRuntimeProjections.Project (field);
  982. }
  983. void InitializeFields ()
  984. {
  985. if (metadata.Fields != null)
  986. return;
  987. metadata.Fields = new FieldDefinition [image.GetTableLength (Table.Field)];
  988. }
  989. TypeReference ReadFieldType (uint signature)
  990. {
  991. var reader = ReadSignature (signature);
  992. const byte field_sig = 0x6;
  993. if (reader.ReadByte () != field_sig)
  994. throw new NotSupportedException ();
  995. return reader.ReadTypeSignature ();
  996. }
  997. public int ReadFieldRVA (FieldDefinition field)
  998. {
  999. InitializeFieldRVAs ();
  1000. var rid = field.token.RID;
  1001. RVA rva;
  1002. if (!metadata.FieldRVAs.TryGetValue (rid, out rva))
  1003. return 0;
  1004. var size = GetFieldTypeSize (field.FieldType);
  1005. if (size == 0 || rva == 0)
  1006. return 0;
  1007. metadata.FieldRVAs.Remove (rid);
  1008. field.InitialValue = GetFieldInitializeValue (size, rva);
  1009. return (int) rva;
  1010. }
  1011. byte [] GetFieldInitializeValue (int size, RVA rva)
  1012. {
  1013. return image.GetReaderAt (rva, size, (s, reader) => reader.ReadBytes (s)) ?? Empty<byte>.Array;
  1014. }
  1015. static int GetFieldTypeSize (TypeReference type)
  1016. {
  1017. int size = 0;
  1018. switch (type.etype) {
  1019. case ElementType.Boolean:
  1020. case ElementType.U1:
  1021. case ElementType.I1:
  1022. size = 1;
  1023. break;
  1024. case ElementType.U2:
  1025. case ElementType.I2:
  1026. case ElementType.Char:
  1027. size = 2;
  1028. break;
  1029. case ElementType.U4:
  1030. case ElementType.I4:
  1031. case ElementType.R4:
  1032. size = 4;
  1033. break;
  1034. case ElementType.U8:
  1035. case ElementType.I8:
  1036. case ElementType.R8:
  1037. size = 8;
  1038. break;
  1039. case ElementType.Ptr:
  1040. case ElementType.FnPtr:
  1041. size = IntPtr.Size;
  1042. break;
  1043. case ElementType.CModOpt:
  1044. case ElementType.CModReqD:
  1045. return GetFieldTypeSize (((IModifierType) type).ElementType);
  1046. default:
  1047. var field_type = type.Resolve ();
  1048. if (field_type != null && field_type.HasLayoutInfo)
  1049. size = field_type.ClassSize;
  1050. break;
  1051. }
  1052. return size;
  1053. }
  1054. void InitializeFieldRVAs ()
  1055. {
  1056. if (metadata.FieldRVAs != null)
  1057. return;
  1058. int length = MoveTo (Table.FieldRVA);
  1059. var field_rvas = metadata.FieldRVAs = new Dictionary<uint, uint> (length);
  1060. for (int i = 0; i < length; i++) {
  1061. var rva = ReadUInt32 ();
  1062. var field = ReadTableIndex (Table.Field);
  1063. field_rvas.Add (field, rva);
  1064. }
  1065. }
  1066. public int ReadFieldLayout (FieldDefinition field)
  1067. {
  1068. InitializeFieldLayouts ();
  1069. var rid = field.token.RID;
  1070. uint offset;
  1071. if (!metadata.FieldLayouts.TryGetValue (rid, out offset))
  1072. return Mixin.NoDataMarker;
  1073. metadata.FieldLayouts.Remove (rid);
  1074. return (int) offset;
  1075. }
  1076. void InitializeFieldLayouts ()
  1077. {
  1078. if (metadata.FieldLayouts != null)
  1079. return;
  1080. int length = MoveTo (Table.FieldLayout);
  1081. var field_layouts = metadata.FieldLayouts = new Dictionary<uint, uint> (length);
  1082. for (int i = 0; i < length; i++) {
  1083. var offset = ReadUInt32 ();
  1084. var field = ReadTableIndex (Table.Field);
  1085. field_layouts.Add (field, offset);
  1086. }
  1087. }
  1088. public bool HasEvents (TypeDefinition type)
  1089. {
  1090. InitializeEvents ();
  1091. Range range;
  1092. if (!metadata.TryGetEventsRange (type, out range))
  1093. return false;
  1094. return range.Length > 0;
  1095. }
  1096. public Collection<EventDefinition> ReadEvents (TypeDefinition type)
  1097. {
  1098. InitializeEvents ();
  1099. Range range;
  1100. if (!metadata.TryGetEventsRange (type, out range))
  1101. return new MemberDefinitionCollection<EventDefinition> (type);
  1102. var events = new MemberDefinitionCollection<EventDefinition> (type, (int) range.Length);
  1103. metadata.RemoveEventsRange (type);
  1104. if (range.Length == 0)
  1105. return events;
  1106. this.context = type;
  1107. if (!MoveTo (Table.EventPtr, range.Start)) {
  1108. if (!MoveTo (Table.Event, range.Start))
  1109. return events;
  1110. for (uint i = 0; i < range.Length; i++)
  1111. ReadEvent (range.Start + i, events);
  1112. } else
  1113. ReadPointers (Table.EventPtr, Table.Event, range, events, ReadEvent);
  1114. return events;
  1115. }
  1116. void ReadEvent (uint event_rid, Collection<EventDefinition> events)
  1117. {
  1118. var attributes = (EventAttributes) ReadUInt16 ();
  1119. var name = ReadString ();
  1120. var event_type = GetTypeDefOrRef (ReadMetadataToken (CodedIndex.TypeDefOrRef));
  1121. var @event = new EventDefinition (name, attributes, event_type);
  1122. @event.token = new MetadataToken (TokenType.Event, event_rid);
  1123. if (IsDeleted (@event))
  1124. return;
  1125. events.Add (@event);
  1126. }
  1127. void InitializeEvents ()
  1128. {
  1129. if (metadata.Events != null)
  1130. return;
  1131. int length = MoveTo (Table.EventMap);
  1132. metadata.Events = new Dictionary<uint, Range> (length);
  1133. for (uint i = 1; i <= length; i++) {
  1134. var type_rid = ReadTableIndex (Table.TypeDef);
  1135. Range events_range = ReadListRange (i, Table.EventMap, Table.Event);
  1136. metadata.AddEventsRange (type_rid, events_range);
  1137. }
  1138. }
  1139. public bool HasProperties (TypeDefinition type)
  1140. {
  1141. InitializeProperties ();
  1142. Range range;
  1143. if (!metadata.TryGetPropertiesRange (type, out range))
  1144. return false;
  1145. return range.Length > 0;
  1146. }
  1147. public Collection<PropertyDefinition> ReadProperties (TypeDefinition type)
  1148. {
  1149. InitializeProperties ();
  1150. Range range;
  1151. if (!metadata.TryGetPropertiesRange (type, out range))
  1152. return new MemberDefinitionCollection<PropertyDefinition> (type);
  1153. metadata.RemovePropertiesRange (type);
  1154. var properties = new MemberDefinitionCollection<PropertyDefinition> (type, (int) range.Length);
  1155. if (range.Length == 0)
  1156. return properties;
  1157. this.context = type;
  1158. if (!MoveTo (Table.PropertyPtr, range.Start)) {
  1159. if (!MoveTo (Table.Property, range.Start))
  1160. return properties;
  1161. for (uint i = 0; i < range.Length; i++)
  1162. ReadProperty (range.Start + i, properties);
  1163. } else
  1164. ReadPointers (Table.PropertyPtr, Table.Property, range, properties, ReadProperty);
  1165. return properties;
  1166. }
  1167. void ReadProperty (uint property_rid, Collection<PropertyDefinition> properties)
  1168. {
  1169. var attributes = (PropertyAttributes) ReadUInt16 ();
  1170. var name = ReadString ();
  1171. var signature = ReadBlobIndex ();
  1172. var reader = ReadSignature (signature);
  1173. const byte property_signature = 0x8;
  1174. var calling_convention = reader.ReadByte ();
  1175. if ((calling_convention & property_signature) == 0)
  1176. throw new NotSupportedException ();
  1177. var has_this = (calling_convention & 0x20) != 0;
  1178. reader.ReadCompressedUInt32 (); // count
  1179. var property = new PropertyDefinition (name, attributes, reader.ReadTypeSignature ());
  1180. property.HasThis = has_this;
  1181. property.token = new MetadataToken (TokenType.Property, property_rid);
  1182. if (IsDeleted (property))
  1183. return;
  1184. properties.Add (property);
  1185. }
  1186. void InitializeProperties ()
  1187. {
  1188. if (metadata.Properties != null)
  1189. return;
  1190. int length = MoveTo (Table.PropertyMap);
  1191. metadata.Properties = new Dictionary<uint, Range> (length);
  1192. for (uint i = 1; i <= length; i++) {
  1193. var type_rid = ReadTableIndex (Table.TypeDef);
  1194. var properties_range = ReadListRange (i, Table.PropertyMap, Table.Property);
  1195. metadata.AddPropertiesRange (type_rid, properties_range);
  1196. }
  1197. }
  1198. MethodSemanticsAttributes ReadMethodSemantics (MethodDefinition method)
  1199. {
  1200. InitializeMethodSemantics ();
  1201. Row<MethodSemanticsAttributes, MetadataToken> row;
  1202. if (!metadata.Semantics.TryGetValue (method.token.RID, out row))
  1203. return MethodSemanticsAttributes.None;
  1204. var type = method.DeclaringType;
  1205. switch (row.Col1) {
  1206. case MethodSemanticsAttributes.AddOn:
  1207. GetEvent (type, row.Col2).add_method = method;
  1208. break;
  1209. case MethodSemanticsAttributes.Fire:
  1210. GetEvent (type, row.Col2).invoke_method = method;
  1211. break;
  1212. case MethodSemanticsAttributes.RemoveOn:
  1213. GetEvent (type, row.Col2).remove_method = method;
  1214. break;
  1215. case MethodSemanticsAttributes.Getter:
  1216. GetProperty (type, row.Col2).get_method = method;
  1217. break;
  1218. case MethodSemanticsAttributes.Setter:
  1219. GetProperty (type, row.Col2).set_method = method;
  1220. break;
  1221. case MethodSemanticsAttributes.Other:
  1222. switch (row.Col2.TokenType) {
  1223. case TokenType.Event: {
  1224. var @event = GetEvent (type, row.Col2);
  1225. if (@event.other_methods == null)
  1226. @event.other_methods = new Collection<MethodDefinition> ();
  1227. @event.other_methods.Add (method);
  1228. break;
  1229. }
  1230. case TokenType.Property: {
  1231. var property = GetProperty (type, row.Col2);
  1232. if (property.other_methods == null)
  1233. property.other_methods = new Collection<MethodDefinition> ();
  1234. property.other_methods.Add (method);
  1235. break;
  1236. }
  1237. default:
  1238. throw new NotSupportedException ();
  1239. }
  1240. break;
  1241. default:
  1242. throw new NotSupportedException ();
  1243. }
  1244. metadata.Semantics.Remove (method.token.RID);
  1245. return row.Col1;
  1246. }
  1247. static EventDefinition GetEvent (TypeDefinition type, MetadataToken token)
  1248. {
  1249. if (token.TokenType != TokenType.Event)
  1250. throw new ArgumentException ();
  1251. return GetMember (type.Events, token);
  1252. }
  1253. static PropertyDefinition GetProperty (TypeDefinition type, MetadataToken token)
  1254. {
  1255. if (token.TokenType != TokenType.Property)
  1256. throw new ArgumentException ();
  1257. return GetMember (type.Properties, token);
  1258. }
  1259. static TMember GetMember<TMember> (Collection<TMember> members, MetadataToken token) where TMember : IMemberDefinition
  1260. {
  1261. for (int i = 0; i < members.Count; i++) {
  1262. var member = members [i];
  1263. if (member.MetadataToken == token)
  1264. return member;
  1265. }
  1266. throw new ArgumentException ();
  1267. }
  1268. void InitializeMethodSemantics ()
  1269. {
  1270. if (metadata.Semantics != null)
  1271. return;
  1272. int length = MoveTo (Table.MethodSemantics);
  1273. var semantics = metadata.Semantics = new Dictionary<uint, Row<MethodSemanticsAttributes, MetadataToken>> (0);
  1274. for (uint i = 0; i < length; i++) {
  1275. var attributes = (MethodSemanticsAttributes) ReadUInt16 ();
  1276. var method_rid = ReadTableIndex (Table.Method);
  1277. var association = ReadMetadataToken (CodedIndex.HasSemantics);
  1278. semantics [method_rid] = new Row<MethodSemanticsAttributes, MetadataToken> (attributes, association);
  1279. }
  1280. }
  1281. public void ReadMethods (PropertyDefinition property)
  1282. {
  1283. ReadAllSemantics (property.DeclaringType);
  1284. }
  1285. public void ReadMethods (EventDefinition @event)
  1286. {
  1287. ReadAllSemantics (@event.DeclaringType);
  1288. }
  1289. public void ReadAllSemantics (MethodDefinition method)
  1290. {
  1291. ReadAllSemantics (method.DeclaringType);
  1292. }
  1293. void ReadAllSemantics (TypeDefinition type)
  1294. {
  1295. var methods = type.Methods;
  1296. for (int i = 0; i < methods.Count; i++) {
  1297. var method = methods [i];
  1298. if (method.sem_attrs_ready)
  1299. continue;
  1300. method.sem_attrs = ReadMethodSemantics (method);
  1301. method.sem_attrs_ready = true;
  1302. }
  1303. }
  1304. public Collection<MethodDefinition> ReadMethods (TypeDefinition type)
  1305. {
  1306. var methods_range = type.methods_range;
  1307. if (methods_range.Length == 0)
  1308. return new MemberDefinitionCollection<MethodDefinition> (type);
  1309. var methods = new MemberDefinitionCollection<MethodDefinition> (type, (int) methods_range.Length);
  1310. if (!MoveTo (Table.MethodPtr, methods_range.Start)) {
  1311. if (!MoveTo (Table.Method, methods_range.Start))
  1312. return methods;
  1313. for (uint i = 0; i < methods_range.Length; i++)
  1314. ReadMethod (methods_range.Start + i, methods);
  1315. } else
  1316. ReadPointers (Table.MethodPtr, Table.Method, methods_range, methods, ReadMethod);
  1317. return methods;
  1318. }
  1319. void ReadPointers<TMember> (Table ptr, Table table, Range range, Collection<TMember> members, Action<uint, Collection<TMember>> reader)
  1320. where TMember : IMemberDefinition
  1321. {
  1322. for (uint i = 0; i < range.Length; i++) {
  1323. MoveTo (ptr, range.Start + i);
  1324. var rid = ReadTableIndex (table);
  1325. MoveTo (table, rid);
  1326. reader (rid, members);
  1327. }
  1328. }
  1329. static bool IsDeleted (IMemberDefinition member)
  1330. {
  1331. return member.IsSpecialName && member.Name == "_Deleted";
  1332. }
  1333. void InitializeMethods ()
  1334. {
  1335. if (metadata.Methods != null)
  1336. return;
  1337. metadata.Methods = new MethodDefinition [image.GetTableLength (Table.Method)];
  1338. }
  1339. void ReadMethod (uint method_rid, Collection<MethodDefinition> methods)
  1340. {
  1341. var method = new MethodDefinition ();
  1342. method.rva = ReadUInt32 ();
  1343. method.ImplAttributes = (MethodImplAttributes) ReadUInt16 ();
  1344. method.Attributes = (MethodAttributes) ReadUInt16 ();
  1345. method.Name = ReadString ();
  1346. method.token = new MetadataToken (TokenType.Method, method_rid);
  1347. if (IsDeleted (method))
  1348. return;
  1349. methods.Add (method); // attach method
  1350. var signature = ReadBlobIndex ();
  1351. var param_range = ReadListRange (method_rid, Table.Method, Table.Param);
  1352. this.context = method;
  1353. ReadMethodSignature (signature, method);
  1354. metadata.AddMethodDefinition (method);
  1355. if (param_range.Length != 0) {
  1356. var position = base.position;
  1357. ReadParameters (method, param_range);
  1358. base.position = position;
  1359. }
  1360. if (module.IsWindowsMetadata ())
  1361. WindowsRuntimeProjections.Project (method);
  1362. }
  1363. void ReadParameters (MethodDefinition method, Range param_range)
  1364. {
  1365. if (!MoveTo (Table.ParamPtr, param_range.Start)) {
  1366. if (!MoveTo (Table.Param, param_range.Start))
  1367. return;
  1368. for (uint i = 0; i < param_range.Length; i++)
  1369. ReadParameter (param_range.Start + i, method);
  1370. } else
  1371. ReadParameterPointers (method, param_range);
  1372. }
  1373. void ReadParameterPointers (MethodDefinition method, Range range)
  1374. {
  1375. for (uint i = 0; i < range.Length; i++) {
  1376. MoveTo (Table.ParamPtr, range.Start + i);
  1377. var rid = ReadTableIndex (Table.Param);
  1378. MoveTo (Table.Param, rid);
  1379. ReadParameter (rid, method);
  1380. }
  1381. }
  1382. void ReadParameter (uint param_rid, MethodDefinition method)
  1383. {
  1384. var attributes = (ParameterAttributes) ReadUInt16 ();
  1385. var sequence = ReadUInt16 ();
  1386. var name = ReadString ();
  1387. var parameter = sequence == 0
  1388. ? method.MethodReturnType.Parameter
  1389. : method.Parameters [sequence - 1];
  1390. parameter.token = new MetadataToken (TokenType.Param, param_rid);
  1391. parameter.Name = name;
  1392. parameter.Attributes = attributes;
  1393. }
  1394. void ReadMethodSignature (uint signature, IMethodSignature method)
  1395. {
  1396. var reader = ReadSignature (signature);
  1397. reader.ReadMethodSignature (method);
  1398. }
  1399. public PInvokeInfo ReadPInvokeInfo (MethodDefinition method)
  1400. {
  1401. InitializePInvokes ();
  1402. Row<PInvokeAttributes, uint, uint> row;
  1403. var rid = method.token.RID;
  1404. if (!metadata.PInvokes.TryGetValue (rid, out row))
  1405. return null;
  1406. metadata.PInvokes.Remove (rid);
  1407. return new PInvokeInfo (
  1408. row.Col1,
  1409. image.StringHeap.Read (row.Col2),
  1410. module.ModuleReferences [(int) row.Col3 - 1]);
  1411. }
  1412. void InitializePInvokes ()
  1413. {
  1414. if (metadata.PInvokes != null)
  1415. return;
  1416. int length = MoveTo (Table.ImplMap);
  1417. var pinvokes = metadata.PInvokes = new Dictionary<uint, Row<PInvokeAttributes, uint, uint>> (length);
  1418. for (int i = 1; i <= length; i++) {
  1419. var attributes = (PInvokeAttributes) ReadUInt16 ();
  1420. var method = ReadMetadataToken (CodedIndex.MemberForwarded);
  1421. var name = ReadStringIndex ();
  1422. var scope = ReadTableIndex (Table.File);
  1423. if (method.TokenType != TokenType.Method)
  1424. continue;
  1425. pinvokes.Add (method.RID, new Row<PInvokeAttributes, uint, uint> (attributes, name, scope));
  1426. }
  1427. }
  1428. public bool HasGenericParameters (IGenericParameterProvider provider)
  1429. {
  1430. InitializeGenericParameters ();
  1431. Range [] ranges;
  1432. if (!metadata.TryGetGenericParameterRanges (provider, out ranges))
  1433. return false;
  1434. return RangesSize (ranges) > 0;
  1435. }
  1436. public Collection<GenericParameter> ReadGenericParameters (IGenericParameterProvider provider)
  1437. {
  1438. InitializeGenericParameters ();
  1439. Range [] ranges;
  1440. if (!metadata.TryGetGenericParameterRanges (provider, out ranges))
  1441. return new GenericParameterCollection (provider);
  1442. metadata.RemoveGenericParameterRange (provider);
  1443. var generic_parameters = new GenericParameterCollection (provider, RangesSize (ranges));
  1444. for (int i = 0; i < ranges.Length; i++)
  1445. ReadGenericParametersRange (ranges [i], provider, generic_parameters);
  1446. return generic_parameters;
  1447. }
  1448. void ReadGenericParametersRange (Range range, IGenericParameterProvider provider, GenericParameterCollection generic_parameters)
  1449. {
  1450. if (!MoveTo (Table.GenericParam, range.Start))
  1451. return;
  1452. for (uint i = 0; i < range.Length; i++) {
  1453. ReadUInt16 (); // index
  1454. var flags = (GenericParameterAttributes) ReadUInt16 ();
  1455. ReadMetadataToken (CodedIndex.TypeOrMethodDef);
  1456. var name = ReadString ();
  1457. var parameter = new GenericParameter (name, provider);
  1458. parameter.token = new MetadataToken (TokenType.GenericParam, range.Start + i);
  1459. parameter.Attributes = flags;
  1460. generic_parameters.Add (parameter);
  1461. }
  1462. }
  1463. void InitializeGenericParameters ()
  1464. {
  1465. if (metadata.GenericParameters != null)
  1466. return;
  1467. metadata.GenericParameters = InitializeRanges (
  1468. Table.GenericParam, () => {
  1469. Advance (4);
  1470. var next = ReadMetadataToken (CodedIndex.TypeOrMethodDef);
  1471. ReadStringIndex ();
  1472. return next;
  1473. });
  1474. }
  1475. Dictionary<MetadataToken, Range []> InitializeRanges (Table table, Func<MetadataToken> get_next)
  1476. {
  1477. int length = MoveTo (table);
  1478. var ranges = new Dictionary<MetadataToken, Range []> (length);
  1479. if (length == 0)
  1480. return ranges;
  1481. MetadataToken owner = MetadataToken.Zero;
  1482. Range range = new Range (1, 0);
  1483. for (uint i = 1; i <= length; i++) {
  1484. var next = get_next ();
  1485. if (i == 1) {
  1486. owner = next;
  1487. range.Length++;
  1488. } else if (next != owner) {
  1489. AddRange (ranges, owner, range);
  1490. range = new Range (i, 1);
  1491. owner = next;
  1492. } else
  1493. range.Length++;
  1494. }
  1495. AddRange (ranges, owner, range);
  1496. return ranges;
  1497. }
  1498. static void AddRange (Dictionary<MetadataToken, Range []> ranges, MetadataToken owner, Range range)
  1499. {
  1500. if (owner.RID == 0)
  1501. return;
  1502. Range [] slots;
  1503. if (!ranges.TryGetValue (owner, out slots)) {
  1504. ranges.Add (owner, new [] { range });
  1505. return;
  1506. }
  1507. ranges [owner] = slots.Add(range);
  1508. }
  1509. public bool HasGenericConstraints (GenericParameter generic_parameter)
  1510. {
  1511. InitializeGenericConstraints ();
  1512. Collection<Row<uint, MetadataToken>> mapping;
  1513. if (!metadata.TryGetGenericConstraintMapping (generic_parameter, out mapping))
  1514. return false;
  1515. return mapping.Count > 0;
  1516. }
  1517. public GenericParameterConstraintCollection ReadGenericConstraints (GenericParameter generic_parameter)
  1518. {
  1519. InitializeGenericConstraints ();
  1520. Collection<Row<uint, MetadataToken>> mapping;
  1521. if (!metadata.TryGetGenericConstraintMapping (generic_parameter, out mapping))
  1522. return new GenericParameterConstraintCollection (generic_parameter);
  1523. var constraints = new GenericParameterConstraintCollection (generic_parameter, mapping.Count);
  1524. this.context = (IGenericContext) generic_parameter.Owner;
  1525. for (int i = 0; i < mapping.Count; i++) {
  1526. constraints.Add (
  1527. new GenericParameterConstraint (
  1528. GetTypeDefOrRef (mapping [i].Col2),
  1529. new MetadataToken (TokenType.GenericParamConstraint, mapping [i].Col1)));
  1530. }
  1531. metadata.RemoveGenericConstraintMapping (generic_parameter);
  1532. return constraints;
  1533. }
  1534. void InitializeGenericConstraints ()
  1535. {
  1536. if (metadata.GenericConstraints != null)
  1537. return;
  1538. var length = MoveTo (Table.GenericParamConstraint);
  1539. metadata.GenericConstraints = new Dictionary<uint, Collection<Row<uint, MetadataToken>>> (length);
  1540. for (uint i = 1; i <= length; i++) {
  1541. AddGenericConstraintMapping (
  1542. ReadTableIndex (Table.GenericParam),
  1543. new Row<uint, MetadataToken> (i, ReadMetadataToken (CodedIndex.TypeDefOrRef)));
  1544. }
  1545. }
  1546. void AddGenericConstraintMapping (uint generic_parameter, Row<uint, MetadataToken> constraint)
  1547. {
  1548. metadata.SetGenericConstraintMapping (
  1549. generic_parameter,
  1550. AddMapping (metadata.GenericConstraints, generic_parameter, constraint));
  1551. }
  1552. public bool HasOverrides (MethodDefinition method)
  1553. {
  1554. InitializeOverrides ();
  1555. Collection<MetadataToken> mapping;
  1556. if (!metadata.TryGetOverrideMapping (method, out mapping))
  1557. return false;
  1558. return mapping.Count > 0;
  1559. }
  1560. public Collection<MethodReference> ReadOverrides (MethodDefinition method)
  1561. {
  1562. InitializeOverrides ();
  1563. Collection<MetadataToken> mapping;
  1564. if (!metadata.TryGetOverrideMapping (method, out mapping))
  1565. return new Collection<MethodReference> ();
  1566. var overrides = new Collection<MethodReference> (mapping.Count);
  1567. this.context = method;
  1568. for (int i = 0; i < mapping.Count; i++)
  1569. overrides.Add ((MethodReference) LookupToken (mapping [i]));
  1570. metadata.RemoveOverrideMapping (method);
  1571. return overrides;
  1572. }
  1573. void InitializeOverrides ()
  1574. {
  1575. if (metadata.Overrides != null)
  1576. return;
  1577. var length = MoveTo (Table.MethodImpl);
  1578. metadata.Overrides = new Dictionary<uint, Collection<MetadataToken>> (length);
  1579. for (int i = 1; i <= length; i++) {
  1580. ReadTableIndex (Table.TypeDef);
  1581. var method = ReadMetadataToken (CodedIndex.MethodDefOrRef);
  1582. if (method.TokenType != TokenType.Method)
  1583. throw new NotSupportedException ();
  1584. var @override = ReadMetadataToken (CodedIndex.MethodDefOrRef);
  1585. AddOverrideMapping (method.RID, @override);
  1586. }
  1587. }
  1588. void AddOverrideMapping (uint method_rid, MetadataToken @override)
  1589. {
  1590. metadata.SetOverrideMapping (
  1591. method_rid,
  1592. AddMapping (metadata.Overrides, method_rid, @override));
  1593. }
  1594. public MethodBody ReadMethodBody (MethodDefinition method)
  1595. {
  1596. return code.ReadMethodBody (method);
  1597. }
  1598. public int ReadCodeSize (MethodDefinition method)
  1599. {
  1600. return code.ReadCodeSize (method);
  1601. }
  1602. public CallSite ReadCallSite (MetadataToken token)
  1603. {
  1604. if (!MoveTo (Table.StandAloneSig, token.RID))
  1605. return null;
  1606. var signature = ReadBlobIndex ();
  1607. var call_site = new CallSite ();
  1608. ReadMethodSignature (signature, call_site);
  1609. call_site.MetadataToken = token;
  1610. return call_site;
  1611. }
  1612. public VariableDefinitionCollection ReadVariables (MetadataToken local_var_token)
  1613. {
  1614. if (!MoveTo (Table.StandAloneSig, local_var_token.RID))
  1615. return null;
  1616. var reader = ReadSignature (ReadBlobIndex ());
  1617. const byte local_sig = 0x7;
  1618. if (reader.ReadByte () != local_sig)
  1619. throw new NotSupportedException ();
  1620. var count = reader.ReadCompressedUInt32 ();
  1621. if (count == 0)
  1622. return null;
  1623. var variables = new VariableDefinitionCollection ((int) count);
  1624. for (int i = 0; i < count; i++)
  1625. variables.Add (new VariableDefinition (reader.ReadTypeSignature ()));
  1626. return variables;
  1627. }
  1628. public IMetadataTokenProvider LookupToken (MetadataToken token)
  1629. {
  1630. var rid = token.RID;
  1631. if (rid == 0)
  1632. return null;
  1633. if (metadata_reader != null)
  1634. return metadata_reader.LookupToken (token);
  1635. IMetadataTokenProvider element;
  1636. var position = this.position;
  1637. var context = this.context;
  1638. switch (token.TokenType) {
  1639. case TokenType.TypeDef:
  1640. element = GetTypeDefinition (rid);
  1641. break;
  1642. case TokenType.TypeRef:
  1643. element = GetTypeReference (rid);
  1644. break;
  1645. case TokenType.TypeSpec:
  1646. element = GetTypeSpecification (rid);
  1647. break;
  1648. case TokenType.Field:
  1649. element = GetFieldDefinition (rid);
  1650. break;
  1651. case TokenType.Method:
  1652. element = GetMethodDefinition (rid);
  1653. break;
  1654. case TokenType.MemberRef:
  1655. element = GetMemberReference (rid);
  1656. break;
  1657. case TokenType.MethodSpec:
  1658. element = GetMethodSpecification (rid);
  1659. break;
  1660. default:
  1661. return null;
  1662. }
  1663. this.position = position;
  1664. this.context = context;
  1665. return element;
  1666. }
  1667. public FieldDefinition GetFieldDefinition (uint rid)
  1668. {
  1669. InitializeTypeDefinitions ();
  1670. var field = metadata.GetFieldDefinition (rid);
  1671. if (field != null)
  1672. return field;
  1673. return LookupField (rid);
  1674. }
  1675. FieldDefinition LookupField (uint rid)
  1676. {
  1677. var type = metadata.GetFieldDeclaringType (rid);
  1678. if (type == null)
  1679. return null;
  1680. Mixin.Read (type.Fields);
  1681. return metadata.GetFieldDefinition (rid);
  1682. }
  1683. public MethodDefinition GetMethodDefinition (uint rid)
  1684. {
  1685. InitializeTypeDefinitions ();
  1686. var method = metadata.GetMethodDefinition (rid);
  1687. if (method != null)
  1688. return method;
  1689. return LookupMethod (rid);
  1690. }
  1691. MethodDefinition LookupMethod (uint rid)
  1692. {
  1693. var type = metadata.GetMethodDeclaringType (rid);
  1694. if (type == null)
  1695. return null;
  1696. Mixin.Read (type.Methods);
  1697. return metadata.GetMethodDefinition (rid);
  1698. }
  1699. MethodSpecification GetMethodSpecification (uint rid)
  1700. {
  1701. if (!MoveTo (Table.MethodSpec, rid))
  1702. return null;
  1703. var element_method = (MethodReference) LookupToken (
  1704. ReadMetadataToken (CodedIndex.MethodDefOrRef));
  1705. var signature = ReadBlobIndex ();
  1706. var method_spec = ReadMethodSpecSignature (signature, element_method);
  1707. method_spec.token = new MetadataToken (TokenType.MethodSpec, rid);
  1708. return method_spec;
  1709. }
  1710. MethodSpecification ReadMethodSpecSignature (uint signature, MethodReference method)
  1711. {
  1712. var reader = ReadSignature (signature);
  1713. const byte methodspec_sig = 0x0a;
  1714. var call_conv = reader.ReadByte ();
  1715. if (call_conv != methodspec_sig)
  1716. throw new NotSupportedException ();
  1717. var arity = reader.ReadCompressedUInt32 ();
  1718. var instance = new GenericInstanceMethod (method, (int) arity);
  1719. reader.ReadGenericInstanceSignature (method, instance, arity);
  1720. return instance;
  1721. }
  1722. MemberReference GetMemberReference (uint rid)
  1723. {
  1724. InitializeMemberReferences ();
  1725. var member = metadata.GetMemberReference (rid);
  1726. if (member != null)
  1727. return member;
  1728. member = ReadMemberReference (rid);
  1729. if (member != null && !member.ContainsGenericParameter)
  1730. metadata.AddMemberReference (member);
  1731. return member;
  1732. }
  1733. MemberReference ReadMemberReference (uint rid)
  1734. {
  1735. if (!MoveTo (Table.MemberRef, rid))
  1736. return null;
  1737. var token = ReadMetadataToken (CodedIndex.MemberRefParent);
  1738. var name = ReadString ();
  1739. var signature = ReadBlobIndex ();
  1740. MemberReference member;
  1741. switch (token.TokenType) {
  1742. case TokenType.TypeDef:
  1743. case TokenType.TypeRef:
  1744. case TokenType.TypeSpec:
  1745. member = ReadTypeMemberReference (token, name, signature);
  1746. break;
  1747. case TokenType.Method:
  1748. member = ReadMethodMemberReference (token, name, signature);
  1749. break;
  1750. default:
  1751. throw new NotSupportedException ();
  1752. }
  1753. member.token = new MetadataToken (TokenType.MemberRef, rid);
  1754. if (module.IsWindowsMetadata ())
  1755. WindowsRuntimeProjections.Project (member);
  1756. return member;
  1757. }
  1758. MemberReference ReadTypeMemberReference (MetadataToken type, string name, uint signature)
  1759. {
  1760. var declaring_type = GetTypeDefOrRef (type);
  1761. if (!declaring_type.IsArray)
  1762. this.context = declaring_type;
  1763. var member = ReadMemberReferenceSignature (signature, declaring_type);
  1764. member.Name = name;
  1765. return member;
  1766. }
  1767. MemberReference ReadMemberReferenceSignature (uint signature, TypeReference declaring_type)
  1768. {
  1769. var reader = ReadSignature (signature);
  1770. const byte field_sig = 0x6;
  1771. if (reader.buffer [reader.position] == field_sig) {
  1772. reader.position++;
  1773. var field = new FieldReference ();
  1774. field.DeclaringType = declaring_type;
  1775. field.FieldType = reader.ReadTypeSignature ();
  1776. return field;
  1777. } else {
  1778. var method = new MethodReference ();
  1779. method.DeclaringType = declaring_type;
  1780. reader.ReadMethodSignature (method);
  1781. return method;
  1782. }
  1783. }
  1784. MemberReference ReadMethodMemberReference (MetadataToken token, string name, uint signature)
  1785. {
  1786. var method = GetMethodDefinition (token.RID);
  1787. this.context = method;
  1788. var member = ReadMemberReferenceSignature (signature, method.DeclaringType);
  1789. member.Name = name;
  1790. return member;
  1791. }
  1792. void InitializeMemberReferences ()
  1793. {
  1794. if (metadata.MemberReferences != null)
  1795. return;
  1796. metadata.MemberReferences = new MemberReference [image.GetTableLength (Table.MemberRef)];
  1797. }
  1798. public IEnumerable<MemberReference> GetMemberReferences ()
  1799. {
  1800. InitializeMemberReferences ();
  1801. var length = image.GetTableLength (Table.MemberRef);
  1802. var type_system = module.TypeSystem;
  1803. var context = new MethodDefinition (string.Empty, MethodAttributes.Static, type_system.Void);
  1804. context.DeclaringType = new TypeDefinition (string.Empty, string.Empty, TypeAttributes.Public);
  1805. var member_references = new MemberReference [length];
  1806. for (uint i = 1; i <= length; i++) {
  1807. this.context = context;
  1808. member_references [i - 1] = GetMemberReference (i);
  1809. }
  1810. return member_references;
  1811. }
  1812. void InitializeConstants ()
  1813. {
  1814. if (metadata.Constants != null)
  1815. return;
  1816. var length = MoveTo (Table.Constant);
  1817. var constants = metadata.Constants = new Dictionary<MetadataToken, Row<ElementType, uint>> (length);
  1818. for (uint i = 1; i <= length; i++) {
  1819. var type = (ElementType) ReadUInt16 ();
  1820. var owner = ReadMetadataToken (CodedIndex.HasConstant);
  1821. var signature = ReadBlobIndex ();
  1822. constants.Add (owner, new Row<ElementType, uint> (type, signature));
  1823. }
  1824. }
  1825. public TypeReference ReadConstantSignature (MetadataToken token)
  1826. {
  1827. if (token.TokenType != TokenType.Signature)
  1828. throw new NotSupportedException ();
  1829. if (token.RID == 0)
  1830. return null;
  1831. if (!MoveTo (Table.StandAloneSig, token.RID))
  1832. return null;
  1833. return ReadFieldType (ReadBlobIndex ());
  1834. }
  1835. public object ReadConstant (IConstantProvider owner)
  1836. {
  1837. InitializeConstants ();
  1838. Row<ElementType, uint> row;
  1839. if (!metadata.Constants.TryGetValue (owner.MetadataToken, out row))
  1840. return Mixin.NoValue;
  1841. metadata.Constants.Remove (owner.MetadataToken);
  1842. return ReadConstantValue (row.Col1, row.Col2);
  1843. }
  1844. object ReadConstantValue (ElementType etype, uint signature)
  1845. {
  1846. switch (etype) {
  1847. case ElementType.Class:
  1848. case ElementType.Object:
  1849. return null;
  1850. case ElementType.String:
  1851. return ReadConstantString (signature);
  1852. default:
  1853. return ReadConstantPrimitive (etype, signature);
  1854. }
  1855. }
  1856. string ReadConstantString (uint signature)
  1857. {
  1858. byte [] blob;
  1859. int index, count;
  1860. GetBlobView (signature, out blob, out index, out count);
  1861. if (count == 0)
  1862. return string.Empty;
  1863. if ((count & 1) == 1)
  1864. count--;
  1865. return Encoding.Unicode.GetString (blob, index, count);
  1866. }
  1867. object ReadConstantPrimitive (ElementType type, uint signature)
  1868. {
  1869. var reader = ReadSignature (signature);
  1870. return reader.ReadConstantSignature (type);
  1871. }
  1872. internal void InitializeCustomAttributes ()
  1873. {
  1874. if (metadata.CustomAttributes != null)
  1875. return;
  1876. metadata.CustomAttributes = InitializeRanges (
  1877. Table.CustomAttribute, () => {
  1878. var next = ReadMetadataToken (CodedIndex.HasCustomAttribute);
  1879. ReadMetadataToken (CodedIndex.CustomAttributeType);
  1880. ReadBlobIndex ();
  1881. return next;
  1882. });
  1883. }
  1884. public bool HasCustomAttributes (ICustomAttributeProvider owner)
  1885. {
  1886. InitializeCustomAttributes ();
  1887. Range [] ranges;
  1888. if (!metadata.TryGetCustomAttributeRanges (owner, out ranges))
  1889. return false;
  1890. return RangesSize (ranges) > 0;
  1891. }
  1892. public Collection<CustomAttribute> ReadCustomAttributes (ICustomAttributeProvider owner)
  1893. {
  1894. InitializeCustomAttributes ();
  1895. Range [] ranges;
  1896. if (!metadata.TryGetCustomAttributeRanges (owner, out ranges))
  1897. return new Collection<CustomAttribute> ();
  1898. var custom_attributes = new Collection<CustomAttribute> (RangesSize (ranges));
  1899. for (int i = 0; i < ranges.Length; i++)
  1900. ReadCustomAttributeRange (ranges [i], custom_attributes);
  1901. metadata.RemoveCustomAttributeRange (owner);
  1902. if (module.IsWindowsMetadata ())
  1903. foreach (var custom_attribute in custom_attributes)
  1904. WindowsRuntimeProjections.Project (owner, custom_attribute);
  1905. return custom_attributes;
  1906. }
  1907. void ReadCustomAttributeRange (Range range, Collection<CustomAttribute> custom_attributes)
  1908. {
  1909. if (!MoveTo (Table.CustomAttribute, range.Start))
  1910. return;
  1911. for (var i = 0; i < range.Length; i++) {
  1912. ReadMetadataToken (CodedIndex.HasCustomAttribute);
  1913. var constructor = (MethodReference) LookupToken (
  1914. ReadMetadataToken (CodedIndex.CustomAttributeType));
  1915. var signature = ReadBlobIndex ();
  1916. custom_attributes.Add (new CustomAttribute (signature, constructor));
  1917. }
  1918. }
  1919. static int RangesSize (Range [] ranges)
  1920. {
  1921. uint size = 0;
  1922. for (int i = 0; i < ranges.Length; i++)
  1923. size += ranges [i].Length;
  1924. return (int) size;
  1925. }
  1926. public IEnumerable<CustomAttribute> GetCustomAttributes ()
  1927. {
  1928. InitializeTypeDefinitions ();
  1929. var length = image.TableHeap [Table.CustomAttribute].Length;
  1930. var custom_attributes = new Collection<CustomAttribute> ((int) length);
  1931. ReadCustomAttributeRange (new Range (1, length), custom_attributes);
  1932. return custom_attributes;
  1933. }
  1934. public byte [] ReadCustomAttributeBlob (uint signature)
  1935. {
  1936. return ReadBlob (signature);
  1937. }
  1938. public void ReadCustomAttributeSignature (CustomAttribute attribute)
  1939. {
  1940. var reader = ReadSignature (attribute.signature);
  1941. if (!reader.CanReadMore ())
  1942. return;
  1943. if (reader.ReadUInt16 () != 0x0001)
  1944. throw new InvalidOperationException ();
  1945. var constructor = attribute.Constructor;
  1946. if (constructor.HasParameters)
  1947. reader.ReadCustomAttributeConstructorArguments (attribute, constructor.Parameters);
  1948. if (!reader.CanReadMore ())
  1949. return;
  1950. var named = reader.ReadUInt16 ();
  1951. if (named == 0)
  1952. return;
  1953. reader.ReadCustomAttributeNamedArguments (named, ref attribute.fields, ref attribute.properties);
  1954. }
  1955. void InitializeMarshalInfos ()
  1956. {
  1957. if (metadata.FieldMarshals != null)
  1958. return;
  1959. var length = MoveTo (Table.FieldMarshal);
  1960. var marshals = metadata.FieldMarshals = new Dictionary<MetadataToken, uint> (length);
  1961. for (int i = 0; i < length; i++) {
  1962. var token = ReadMetadataToken (CodedIndex.HasFieldMarshal);
  1963. var signature = ReadBlobIndex ();
  1964. if (token.RID == 0)
  1965. continue;
  1966. marshals.Add (token, signature);
  1967. }
  1968. }
  1969. public bool HasMarshalInfo (IMarshalInfoProvider owner)
  1970. {
  1971. InitializeMarshalInfos ();
  1972. return metadata.FieldMarshals.ContainsKey (owner.MetadataToken);
  1973. }
  1974. public MarshalInfo ReadMarshalInfo (IMarshalInfoProvider owner)
  1975. {
  1976. InitializeMarshalInfos ();
  1977. uint signature;
  1978. if (!metadata.FieldMarshals.TryGetValue (owner.MetadataToken, out signature))
  1979. return null;
  1980. var reader = ReadSignature (signature);
  1981. metadata.FieldMarshals.Remove (owner.MetadataToken);
  1982. return reader.ReadMarshalInfo ();
  1983. }
  1984. void InitializeSecurityDeclarations ()
  1985. {
  1986. if (metadata.SecurityDeclarations != null)
  1987. return;
  1988. metadata.SecurityDeclarations = InitializeRanges (
  1989. Table.DeclSecurity, () => {
  1990. ReadUInt16 ();
  1991. var next = ReadMetadataToken (CodedIndex.HasDeclSecurity);
  1992. ReadBlobIndex ();
  1993. return next;
  1994. });
  1995. }
  1996. public bool HasSecurityDeclarations (ISecurityDeclarationProvider owner)
  1997. {
  1998. InitializeSecurityDeclarations ();
  1999. Range [] ranges;
  2000. if (!metadata.TryGetSecurityDeclarationRanges (owner, out ranges))
  2001. return false;
  2002. return RangesSize (ranges) > 0;
  2003. }
  2004. public Collection<SecurityDeclaration> ReadSecurityDeclarations (ISecurityDeclarationProvider owner)
  2005. {
  2006. InitializeSecurityDeclarations ();
  2007. Range [] ranges;
  2008. if (!metadata.TryGetSecurityDeclarationRanges (owner, out ranges))
  2009. return new Collection<SecurityDeclaration> ();
  2010. var security_declarations = new Collection<SecurityDeclaration> (RangesSize (ranges));
  2011. for (int i = 0; i < ranges.Length; i++)
  2012. ReadSecurityDeclarationRange (ranges [i], security_declarations);
  2013. metadata.RemoveSecurityDeclarationRange (owner);
  2014. return security_declarations;
  2015. }
  2016. void ReadSecurityDeclarationRange (Range range, Collection<SecurityDeclaration> security_declarations)
  2017. {
  2018. if (!MoveTo (Table.DeclSecurity, range.Start))
  2019. return;
  2020. for (int i = 0; i < range.Length; i++) {
  2021. var action = (SecurityAction) ReadUInt16 ();
  2022. ReadMetadataToken (CodedIndex.HasDeclSecurity);
  2023. var signature = ReadBlobIndex ();
  2024. security_declarations.Add (new SecurityDeclaration (action, signature, module));
  2025. }
  2026. }
  2027. public byte [] ReadSecurityDeclarationBlob (uint signature)
  2028. {
  2029. return ReadBlob (signature);
  2030. }
  2031. public void ReadSecurityDeclarationSignature (SecurityDeclaration declaration)
  2032. {
  2033. var signature = declaration.signature;
  2034. var reader = ReadSignature (signature);
  2035. if (reader.buffer [reader.position] != '.') {
  2036. ReadXmlSecurityDeclaration (signature, declaration);
  2037. return;
  2038. }
  2039. reader.position++;
  2040. var count = reader.ReadCompressedUInt32 ();
  2041. var attributes = new Collection<SecurityAttribute> ((int) count);
  2042. for (int i = 0; i < count; i++)
  2043. attributes.Add (reader.ReadSecurityAttribute ());
  2044. declaration.security_attributes = attributes;
  2045. }
  2046. void ReadXmlSecurityDeclaration (uint signature, SecurityDeclaration declaration)
  2047. {
  2048. var attributes = new Collection<SecurityAttribute> (1);
  2049. var attribute = new SecurityAttribute (
  2050. module.TypeSystem.LookupType ("System.Security.Permissions", "PermissionSetAttribute"));
  2051. attribute.properties = new Collection<CustomAttributeNamedArgument> (1);
  2052. attribute.properties.Add (
  2053. new CustomAttributeNamedArgument (
  2054. "XML",
  2055. new CustomAttributeArgument (
  2056. module.TypeSystem.String,
  2057. ReadUnicodeStringBlob (signature))));
  2058. attributes.Add (attribute);
  2059. declaration.security_attributes = attributes;
  2060. }
  2061. public Collection<ExportedType> ReadExportedTypes ()
  2062. {
  2063. var length = MoveTo (Table.ExportedType);
  2064. if (length == 0)
  2065. return new Collection<ExportedType> ();
  2066. var exported_types = new Collection<ExportedType> (length);
  2067. for (int i = 1; i <= length; i++) {
  2068. var attributes = (TypeAttributes) ReadUInt32 ();
  2069. var identifier = ReadUInt32 ();
  2070. var name = ReadString ();
  2071. var @namespace = ReadString ();
  2072. var implementation = ReadMetadataToken (CodedIndex.Implementation);
  2073. ExportedType declaring_type = null;
  2074. IMetadataScope scope = null;
  2075. switch (implementation.TokenType) {
  2076. case TokenType.AssemblyRef:
  2077. case TokenType.File:
  2078. scope = GetExportedTypeScope (implementation);
  2079. break;
  2080. case TokenType.ExportedType:
  2081. // FIXME: if the table is not properly sorted
  2082. declaring_type = exported_types [(int) implementation.RID - 1];
  2083. break;
  2084. }
  2085. var exported_type = new ExportedType (@namespace, name, module, scope) {
  2086. Attributes = attributes,
  2087. Identifier = (int) identifier,
  2088. DeclaringType = declaring_type,
  2089. };
  2090. exported_type.token = new MetadataToken (TokenType.ExportedType, i);
  2091. exported_types.Add (exported_type);
  2092. }
  2093. return exported_types;
  2094. }
  2095. IMetadataScope GetExportedTypeScope (MetadataToken token)
  2096. {
  2097. var position = this.position;
  2098. IMetadataScope scope;
  2099. switch (token.TokenType) {
  2100. case TokenType.AssemblyRef:
  2101. InitializeAssemblyReferences ();
  2102. scope = metadata.GetAssemblyNameReference (token.RID);
  2103. break;
  2104. case TokenType.File:
  2105. InitializeModuleReferences ();
  2106. scope = GetModuleReferenceFromFile (token);
  2107. break;
  2108. default:
  2109. throw new NotSupportedException ();
  2110. }
  2111. this.position = position;
  2112. return scope;
  2113. }
  2114. ModuleReference GetModuleReferenceFromFile (MetadataToken token)
  2115. {
  2116. if (!MoveTo (Table.File, token.RID))
  2117. return null;
  2118. ReadUInt32 ();
  2119. var file_name = ReadString ();
  2120. var modules = module.ModuleReferences;
  2121. ModuleReference reference;
  2122. for (int i = 0; i < modules.Count; i++) {
  2123. reference = modules [i];
  2124. if (reference.Name == file_name)
  2125. return reference;
  2126. }
  2127. reference = new ModuleReference (file_name);
  2128. modules.Add (reference);
  2129. return reference;
  2130. }
  2131. void InitializeDocuments ()
  2132. {
  2133. if (metadata.Documents != null)
  2134. return;
  2135. int length = MoveTo (Table.Document);
  2136. var documents = metadata.Documents = new Document [length];
  2137. for (uint i = 1; i <= length; i++) {
  2138. var name_index = ReadBlobIndex ();
  2139. var hash_algorithm = ReadGuid ();
  2140. var hash = ReadBlob ();
  2141. var language = ReadGuid ();
  2142. var signature = ReadSignature (name_index);
  2143. var name = signature.ReadDocumentName ();
  2144. documents [i - 1] = new Document (name) {
  2145. HashAlgorithmGuid = hash_algorithm,
  2146. Hash = hash,
  2147. LanguageGuid = language,
  2148. token = new MetadataToken (TokenType.Document, i),
  2149. };
  2150. }
  2151. }
  2152. public Collection<SequencePoint> ReadSequencePoints (MethodDefinition method)
  2153. {
  2154. InitializeDocuments ();
  2155. if (!MoveTo (Table.MethodDebugInformation, method.MetadataToken.RID))
  2156. return new Collection<SequencePoint> (0);
  2157. var document_index = ReadTableIndex (Table.Document);
  2158. var signature = ReadBlobIndex ();
  2159. if (signature == 0)
  2160. return new Collection<SequencePoint> (0);
  2161. var document = GetDocument (document_index);
  2162. var reader = ReadSignature (signature);
  2163. return reader.ReadSequencePoints (document);
  2164. }
  2165. public Document GetDocument (uint rid)
  2166. {
  2167. var document = metadata.GetDocument (rid);
  2168. if (document == null)
  2169. return null;
  2170. document.custom_infos = GetCustomDebugInformation (document);
  2171. return document;
  2172. }
  2173. void InitializeLocalScopes ()
  2174. {
  2175. if (metadata.LocalScopes != null)
  2176. return;
  2177. InitializeMethods ();
  2178. int length = MoveTo (Table.LocalScope);
  2179. metadata.LocalScopes = new Dictionary<uint, Collection<Row<uint, Range, Range, uint, uint, uint>>> ();
  2180. for (uint i = 1; i <= length; i++) {
  2181. var method = ReadTableIndex (Table.Method);
  2182. var import = ReadTableIndex (Table.ImportScope);
  2183. var variables = ReadListRange (i, Table.LocalScope, Table.LocalVariable);
  2184. var constants = ReadListRange (i, Table.LocalScope, Table.LocalConstant);
  2185. var scope_start = ReadUInt32 ();
  2186. var scope_length = ReadUInt32 ();
  2187. metadata.SetLocalScopes (method, AddMapping (metadata.LocalScopes, method, new Row<uint, Range, Range, uint, uint, uint> (import, variables, constants, scope_start, scope_length, i)));
  2188. }
  2189. }
  2190. public ScopeDebugInformation ReadScope (MethodDefinition method)
  2191. {
  2192. InitializeLocalScopes ();
  2193. InitializeImportScopes ();
  2194. Collection<Row<uint, Range, Range, uint, uint, uint>> records;
  2195. if (!metadata.TryGetLocalScopes (method, out records))
  2196. return null;
  2197. var method_scope = null as ScopeDebugInformation;
  2198. for (int i = 0; i < records.Count; i++) {
  2199. var scope = ReadLocalScope (records [i]);
  2200. if (i == 0) {
  2201. method_scope = scope;
  2202. continue;
  2203. }
  2204. if (!AddScope (method_scope.scopes, scope))
  2205. method_scope.Scopes.Add (scope);
  2206. }
  2207. return method_scope;
  2208. }
  2209. static bool AddScope (Collection<ScopeDebugInformation> scopes, ScopeDebugInformation scope)
  2210. {
  2211. if (scopes.IsNullOrEmpty ())
  2212. return false;
  2213. foreach (var sub_scope in scopes) {
  2214. if (sub_scope.HasScopes && AddScope (sub_scope.Scopes, scope))
  2215. return true;
  2216. if (scope.Start.Offset >= sub_scope.Start.Offset && scope.End.Offset <= sub_scope.End.Offset) {
  2217. sub_scope.Scopes.Add (scope);
  2218. return true;
  2219. }
  2220. }
  2221. return false;
  2222. }
  2223. ScopeDebugInformation ReadLocalScope (Row<uint, Range, Range, uint, uint, uint> record)
  2224. {
  2225. var scope = new ScopeDebugInformation
  2226. {
  2227. start = new InstructionOffset ((int) record.Col4),
  2228. end = new InstructionOffset ((int) (record.Col4 + record.Col5)),
  2229. token = new MetadataToken (TokenType.LocalScope, record.Col6),
  2230. };
  2231. if (record.Col1 > 0)
  2232. scope.import = metadata.GetImportScope (record.Col1);
  2233. if (record.Col2.Length > 0) {
  2234. scope.variables = new Collection<VariableDebugInformation> ((int) record.Col2.Length);
  2235. for (uint i = 0; i < record.Col2.Length; i++) {
  2236. var variable = ReadLocalVariable (record.Col2.Start + i);
  2237. if (variable != null)
  2238. scope.variables.Add (variable);
  2239. }
  2240. }
  2241. if (record.Col3.Length > 0) {
  2242. scope.constants = new Collection<ConstantDebugInformation> ((int) record.Col3.Length);
  2243. for (uint i = 0; i < record.Col3.Length; i++) {
  2244. var constant = ReadLocalConstant (record.Col3.Start + i);
  2245. if (constant != null)
  2246. scope.constants.Add (constant);
  2247. }
  2248. }
  2249. return scope;
  2250. }
  2251. VariableDebugInformation ReadLocalVariable (uint rid)
  2252. {
  2253. if (!MoveTo (Table.LocalVariable, rid))
  2254. return null;
  2255. var attributes = (VariableAttributes) ReadUInt16 ();
  2256. var index = ReadUInt16 ();
  2257. var name = ReadString ();
  2258. var variable = new VariableDebugInformation (index, name) { Attributes = attributes, token = new MetadataToken (TokenType.LocalVariable, rid) };
  2259. variable.custom_infos = GetCustomDebugInformation (variable);
  2260. return variable;
  2261. }
  2262. ConstantDebugInformation ReadLocalConstant (uint rid)
  2263. {
  2264. if (!MoveTo (Table.LocalConstant, rid))
  2265. return null;
  2266. var name = ReadString ();
  2267. var signature = ReadSignature (ReadBlobIndex ());
  2268. var type = signature.ReadTypeSignature ();
  2269. object value;
  2270. if (type.etype == ElementType.String) {
  2271. if (signature.buffer [signature.position] != 0xff) {
  2272. var bytes = signature.ReadBytes ((int) (signature.sig_length - (signature.position - signature.start)));
  2273. value = Encoding.Unicode.GetString (bytes, 0, bytes.Length);
  2274. } else
  2275. value = null;
  2276. } else if (type.IsTypeOf ("System", "Decimal")) {
  2277. var b = signature.ReadByte ();
  2278. value = new decimal (signature.ReadInt32 (), signature.ReadInt32 (), signature.ReadInt32 (), (b & 0x80) != 0, (byte) (b & 0x7f));
  2279. } else if (type.IsTypeOf ("System", "DateTime")) {
  2280. value = new DateTime (signature.ReadInt64());
  2281. } else if (type.etype == ElementType.Object || type.etype == ElementType.None || type.etype == ElementType.Class || type.etype == ElementType.Array) {
  2282. value = null;
  2283. } else
  2284. value = signature.ReadConstantSignature (type.etype);
  2285. var constant = new ConstantDebugInformation (name, type, value) { token = new MetadataToken (TokenType.LocalConstant, rid) };
  2286. constant.custom_infos = GetCustomDebugInformation (constant);
  2287. return constant;
  2288. }
  2289. void InitializeImportScopes ()
  2290. {
  2291. if (metadata.ImportScopes != null)
  2292. return;
  2293. var length = MoveTo (Table.ImportScope);
  2294. metadata.ImportScopes = new ImportDebugInformation [length];
  2295. for (int i = 1; i <= length; i++) {
  2296. ReadTableIndex (Table.ImportScope);
  2297. var import = new ImportDebugInformation ();
  2298. import.token = new MetadataToken (TokenType.ImportScope, i);
  2299. var signature = ReadSignature (ReadBlobIndex ());
  2300. while (signature.CanReadMore ())
  2301. import.Targets.Add (ReadImportTarget (signature));
  2302. metadata.ImportScopes [i - 1] = import;
  2303. }
  2304. MoveTo (Table.ImportScope);
  2305. for (int i = 0; i < length; i++) {
  2306. var parent = ReadTableIndex (Table.ImportScope);
  2307. ReadBlobIndex ();
  2308. if (parent != 0)
  2309. metadata.ImportScopes [i].Parent = metadata.GetImportScope (parent);
  2310. }
  2311. }
  2312. public string ReadUTF8StringBlob (uint signature)
  2313. {
  2314. return ReadStringBlob (signature, Encoding.UTF8);
  2315. }
  2316. string ReadUnicodeStringBlob (uint signature)
  2317. {
  2318. return ReadStringBlob (signature, Encoding.Unicode);
  2319. }
  2320. string ReadStringBlob (uint signature, Encoding encoding)
  2321. {
  2322. byte [] blob;
  2323. int index, count;
  2324. GetBlobView (signature, out blob, out index, out count);
  2325. if (count == 0)
  2326. return string.Empty;
  2327. return encoding.GetString (blob, index, count);
  2328. }
  2329. ImportTarget ReadImportTarget (SignatureReader signature)
  2330. {
  2331. AssemblyNameReference reference = null;
  2332. string @namespace = null;
  2333. string alias = null;
  2334. TypeReference type = null;
  2335. var kind = (ImportTargetKind) signature.ReadCompressedUInt32 ();
  2336. switch (kind) {
  2337. case ImportTargetKind.ImportNamespace:
  2338. @namespace = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2339. break;
  2340. case ImportTargetKind.ImportNamespaceInAssembly:
  2341. reference = metadata.GetAssemblyNameReference (signature.ReadCompressedUInt32 ());
  2342. @namespace = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2343. break;
  2344. case ImportTargetKind.ImportType:
  2345. type = signature.ReadTypeToken ();
  2346. break;
  2347. case ImportTargetKind.ImportXmlNamespaceWithAlias:
  2348. alias = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2349. @namespace = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2350. break;
  2351. case ImportTargetKind.ImportAlias:
  2352. alias = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2353. break;
  2354. case ImportTargetKind.DefineAssemblyAlias:
  2355. alias = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2356. reference = metadata.GetAssemblyNameReference (signature.ReadCompressedUInt32 ());
  2357. break;
  2358. case ImportTargetKind.DefineNamespaceAlias:
  2359. alias = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2360. @namespace = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2361. break;
  2362. case ImportTargetKind.DefineNamespaceInAssemblyAlias:
  2363. alias = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2364. reference = metadata.GetAssemblyNameReference (signature.ReadCompressedUInt32 ());
  2365. @namespace = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2366. break;
  2367. case ImportTargetKind.DefineTypeAlias:
  2368. alias = ReadUTF8StringBlob (signature.ReadCompressedUInt32 ());
  2369. type = signature.ReadTypeToken ();
  2370. break;
  2371. }
  2372. return new ImportTarget (kind) {
  2373. alias = alias,
  2374. type = type,
  2375. @namespace = @namespace,
  2376. reference = reference,
  2377. };
  2378. }
  2379. void InitializeStateMachineMethods ()
  2380. {
  2381. if (metadata.StateMachineMethods != null)
  2382. return;
  2383. var length = MoveTo (Table.StateMachineMethod);
  2384. metadata.StateMachineMethods = new Dictionary<uint, uint> (length);
  2385. for (int i = 0; i < length; i++)
  2386. metadata.StateMachineMethods.Add (ReadTableIndex (Table.Method), ReadTableIndex (Table.Method));
  2387. }
  2388. public MethodDefinition ReadStateMachineKickoffMethod (MethodDefinition method)
  2389. {
  2390. InitializeStateMachineMethods ();
  2391. uint rid;
  2392. if (!metadata.TryGetStateMachineKickOffMethod (method, out rid))
  2393. return null;
  2394. return GetMethodDefinition (rid);
  2395. }
  2396. void InitializeCustomDebugInformations ()
  2397. {
  2398. if (metadata.CustomDebugInformations != null)
  2399. return;
  2400. var length = MoveTo (Table.CustomDebugInformation);
  2401. metadata.CustomDebugInformations = new Dictionary<MetadataToken, Row<Guid, uint, uint> []> ();
  2402. for (uint i = 1; i <= length; i++) {
  2403. var token = ReadMetadataToken (CodedIndex.HasCustomDebugInformation);
  2404. var info = new Row<Guid, uint, uint> (ReadGuid (), ReadBlobIndex (), i);
  2405. Row<Guid, uint, uint> [] infos;
  2406. metadata.CustomDebugInformations.TryGetValue (token, out infos);
  2407. metadata.CustomDebugInformations [token] = infos.Add (info);
  2408. }
  2409. }
  2410. public Collection<CustomDebugInformation> GetCustomDebugInformation (ICustomDebugInformationProvider provider)
  2411. {
  2412. InitializeCustomDebugInformations ();
  2413. Row<Guid, uint, uint> [] rows;
  2414. if (!metadata.CustomDebugInformations.TryGetValue (provider.MetadataToken, out rows))
  2415. return null;
  2416. var infos = new Collection<CustomDebugInformation> (rows.Length);
  2417. for (int i = 0; i < rows.Length; i++) {
  2418. if (rows [i].Col1 == StateMachineScopeDebugInformation.KindIdentifier) {
  2419. var signature = ReadSignature (rows [i].Col2);
  2420. var scopes = new Collection<StateMachineScope> ();
  2421. while (signature.CanReadMore ()) {
  2422. var start = signature.ReadInt32 ();
  2423. var end = start + signature.ReadInt32 ();
  2424. scopes.Add (new StateMachineScope (start, end));
  2425. }
  2426. var state_machine = new StateMachineScopeDebugInformation ();
  2427. state_machine.scopes = scopes;
  2428. infos.Add (state_machine);
  2429. } else if (rows [i].Col1 == AsyncMethodBodyDebugInformation.KindIdentifier) {
  2430. var signature = ReadSignature (rows [i].Col2);
  2431. var catch_offset = signature.ReadInt32 () - 1;
  2432. var yields = new Collection<InstructionOffset> ();
  2433. var resumes = new Collection<InstructionOffset> ();
  2434. var resume_methods = new Collection<MethodDefinition> ();
  2435. while (signature.CanReadMore ()) {
  2436. yields.Add (new InstructionOffset (signature.ReadInt32 ()));
  2437. resumes.Add (new InstructionOffset (signature.ReadInt32 ()));
  2438. resume_methods.Add (GetMethodDefinition (signature.ReadCompressedUInt32 ()));
  2439. }
  2440. var async_body = new AsyncMethodBodyDebugInformation (catch_offset);
  2441. async_body.yields = yields;
  2442. async_body.resumes = resumes;
  2443. async_body.resume_methods = resume_methods;
  2444. infos.Add (async_body);
  2445. } else if (rows [i].Col1 == EmbeddedSourceDebugInformation.KindIdentifier) {
  2446. var signature = ReadSignature (rows [i].Col2);
  2447. var format = signature.ReadInt32 ();
  2448. var length = signature.sig_length - 4;
  2449. var info = null as CustomDebugInformation;
  2450. if (format == 0) {
  2451. info = new EmbeddedSourceDebugInformation (signature.ReadBytes ((int) length), compress: false);
  2452. } else if (format > 0) {
  2453. var compressed_stream = new MemoryStream (signature.ReadBytes ((int) length));
  2454. var decompressed_document = new byte [format]; // if positive, format is the decompressed length of the document
  2455. var decompressed_stream = new MemoryStream (decompressed_document);
  2456. using (var deflate_stream = new DeflateStream (compressed_stream, CompressionMode.Decompress, leaveOpen: true))
  2457. deflate_stream.CopyTo (decompressed_stream);
  2458. info = new EmbeddedSourceDebugInformation (decompressed_document, compress: true);
  2459. } else if (format < 0) {
  2460. info = new BinaryCustomDebugInformation (rows [i].Col1, ReadBlob (rows [i].Col2));
  2461. }
  2462. infos.Add (info);
  2463. } else if (rows [i].Col1 == SourceLinkDebugInformation.KindIdentifier) {
  2464. infos.Add (new SourceLinkDebugInformation (Encoding.UTF8.GetString (ReadBlob (rows [i].Col2))));
  2465. } else {
  2466. infos.Add (new BinaryCustomDebugInformation (rows [i].Col1, ReadBlob (rows [i].Col2)));
  2467. }
  2468. infos [i].token = new MetadataToken (TokenType.CustomDebugInformation, rows [i].Col3);
  2469. }
  2470. return infos;
  2471. }
  2472. }
  2473. sealed class SignatureReader : ByteBuffer {
  2474. readonly MetadataReader reader;
  2475. readonly internal uint start, sig_length;
  2476. TypeSystem TypeSystem {
  2477. get { return reader.module.TypeSystem; }
  2478. }
  2479. public SignatureReader (uint blob, MetadataReader reader)
  2480. : base (reader.image.BlobHeap.data)
  2481. {
  2482. this.reader = reader;
  2483. this.position = (int) blob;
  2484. this.sig_length = ReadCompressedUInt32();
  2485. this.start = (uint) this.position;
  2486. }
  2487. MetadataToken ReadTypeTokenSignature ()
  2488. {
  2489. return CodedIndex.TypeDefOrRef.GetMetadataToken (ReadCompressedUInt32 ());
  2490. }
  2491. GenericParameter GetGenericParameter (GenericParameterType type, uint var)
  2492. {
  2493. var context = reader.context;
  2494. int index = (int) var;
  2495. if (context == null)
  2496. return GetUnboundGenericParameter (type, index);
  2497. IGenericParameterProvider provider;
  2498. switch (type) {
  2499. case GenericParameterType.Type:
  2500. provider = context.Type;
  2501. break;
  2502. case GenericParameterType.Method:
  2503. provider = context.Method;
  2504. break;
  2505. default:
  2506. throw new NotSupportedException ();
  2507. }
  2508. if (!context.IsDefinition)
  2509. CheckGenericContext (provider, index);
  2510. if (index >= provider.GenericParameters.Count)
  2511. return GetUnboundGenericParameter (type, index);
  2512. return provider.GenericParameters [index];
  2513. }
  2514. GenericParameter GetUnboundGenericParameter (GenericParameterType type, int index)
  2515. {
  2516. return new GenericParameter (index, type, reader.module);
  2517. }
  2518. static void CheckGenericContext (IGenericParameterProvider owner, int index)
  2519. {
  2520. var owner_parameters = owner.GenericParameters;
  2521. for (int i = owner_parameters.Count; i <= index; i++)
  2522. owner_parameters.Add (new GenericParameter (owner));
  2523. }
  2524. public void ReadGenericInstanceSignature (IGenericParameterProvider provider, IGenericInstance instance, uint arity)
  2525. {
  2526. if (!provider.IsDefinition)
  2527. CheckGenericContext (provider, (int) arity - 1);
  2528. var instance_arguments = instance.GenericArguments;
  2529. for (int i = 0; i < arity; i++)
  2530. instance_arguments.Add (ReadTypeSignature ());
  2531. }
  2532. ArrayType ReadArrayTypeSignature ()
  2533. {
  2534. var array = new ArrayType (ReadTypeSignature ());
  2535. var rank = ReadCompressedUInt32 ();
  2536. var sizes = new uint [ReadCompressedUInt32 ()];
  2537. for (int i = 0; i < sizes.Length; i++)
  2538. sizes [i] = ReadCompressedUInt32 ();
  2539. var low_bounds = new int [ReadCompressedUInt32 ()];
  2540. for (int i = 0; i < low_bounds.Length; i++)
  2541. low_bounds [i] = ReadCompressedInt32 ();
  2542. array.Dimensions.Clear ();
  2543. for (int i = 0; i < rank; i++) {
  2544. int? lower = null, upper = null;
  2545. if (i < low_bounds.Length)
  2546. lower = low_bounds [i];
  2547. if (i < sizes.Length)
  2548. upper = lower + (int) sizes [i] - 1;
  2549. array.Dimensions.Add (new ArrayDimension (lower, upper));
  2550. }
  2551. return array;
  2552. }
  2553. TypeReference GetTypeDefOrRef (MetadataToken token)
  2554. {
  2555. return reader.GetTypeDefOrRef (token);
  2556. }
  2557. public TypeReference ReadTypeSignature ()
  2558. {
  2559. return ReadTypeSignature ((ElementType) ReadByte ());
  2560. }
  2561. public TypeReference ReadTypeToken ()
  2562. {
  2563. return GetTypeDefOrRef (ReadTypeTokenSignature ());
  2564. }
  2565. TypeReference ReadTypeSignature (ElementType etype)
  2566. {
  2567. switch (etype) {
  2568. case ElementType.ValueType: {
  2569. var value_type = GetTypeDefOrRef (ReadTypeTokenSignature ());
  2570. value_type.KnownValueType ();
  2571. return value_type;
  2572. }
  2573. case ElementType.Class:
  2574. return GetTypeDefOrRef (ReadTypeTokenSignature ());
  2575. case ElementType.Ptr:
  2576. return new PointerType (ReadTypeSignature ());
  2577. case ElementType.FnPtr: {
  2578. var fptr = new FunctionPointerType ();
  2579. ReadMethodSignature (fptr);
  2580. return fptr;
  2581. }
  2582. case ElementType.ByRef:
  2583. return new ByReferenceType (ReadTypeSignature ());
  2584. case ElementType.Pinned:
  2585. return new PinnedType (ReadTypeSignature ());
  2586. case ElementType.SzArray:
  2587. return new ArrayType (ReadTypeSignature ());
  2588. case ElementType.Array:
  2589. return ReadArrayTypeSignature ();
  2590. case ElementType.CModOpt:
  2591. return new OptionalModifierType (
  2592. GetTypeDefOrRef (ReadTypeTokenSignature ()), ReadTypeSignature ());
  2593. case ElementType.CModReqD:
  2594. return new RequiredModifierType (
  2595. GetTypeDefOrRef (ReadTypeTokenSignature ()), ReadTypeSignature ());
  2596. case ElementType.Sentinel:
  2597. return new SentinelType (ReadTypeSignature ());
  2598. case ElementType.Var:
  2599. return GetGenericParameter (GenericParameterType.Type, ReadCompressedUInt32 ());
  2600. case ElementType.MVar:
  2601. return GetGenericParameter (GenericParameterType.Method, ReadCompressedUInt32 ());
  2602. case ElementType.GenericInst: {
  2603. var is_value_type = ReadByte () == (byte) ElementType.ValueType;
  2604. var element_type = GetTypeDefOrRef (ReadTypeTokenSignature ());
  2605. var arity = ReadCompressedUInt32 ();
  2606. var generic_instance = new GenericInstanceType (element_type, (int) arity);
  2607. ReadGenericInstanceSignature (element_type, generic_instance, arity);
  2608. if (is_value_type) {
  2609. generic_instance.KnownValueType ();
  2610. element_type.GetElementType ().KnownValueType ();
  2611. }
  2612. return generic_instance;
  2613. }
  2614. case ElementType.Object: return TypeSystem.Object;
  2615. case ElementType.Void: return TypeSystem.Void;
  2616. case ElementType.TypedByRef: return TypeSystem.TypedReference;
  2617. case ElementType.I: return TypeSystem.IntPtr;
  2618. case ElementType.U: return TypeSystem.UIntPtr;
  2619. default: return GetPrimitiveType (etype);
  2620. }
  2621. }
  2622. public void ReadMethodSignature (IMethodSignature method)
  2623. {
  2624. var calling_convention = ReadByte ();
  2625. const byte has_this = 0x20;
  2626. const byte explicit_this = 0x40;
  2627. if ((calling_convention & has_this) != 0) {
  2628. method.HasThis = true;
  2629. calling_convention = (byte) (calling_convention & ~has_this);
  2630. }
  2631. if ((calling_convention & explicit_this) != 0) {
  2632. method.ExplicitThis = true;
  2633. calling_convention = (byte) (calling_convention & ~explicit_this);
  2634. }
  2635. method.CallingConvention = (MethodCallingConvention) calling_convention;
  2636. var generic_context = method as MethodReference;
  2637. if (generic_context != null && !generic_context.DeclaringType.IsArray)
  2638. reader.context = generic_context;
  2639. if ((calling_convention & 0x10) != 0) {
  2640. var arity = ReadCompressedUInt32 ();
  2641. if (generic_context != null && !generic_context.IsDefinition)
  2642. CheckGenericContext (generic_context, (int) arity -1 );
  2643. }
  2644. var param_count = ReadCompressedUInt32 ();
  2645. method.MethodReturnType.ReturnType = ReadTypeSignature ();
  2646. if (param_count == 0)
  2647. return;
  2648. Collection<ParameterDefinition> parameters;
  2649. var method_ref = method as MethodReference;
  2650. if (method_ref != null)
  2651. parameters = method_ref.parameters = new ParameterDefinitionCollection (method, (int) param_count);
  2652. else
  2653. parameters = method.Parameters;
  2654. for (int i = 0; i < param_count; i++)
  2655. parameters.Add (new ParameterDefinition (ReadTypeSignature ()));
  2656. }
  2657. public object ReadConstantSignature (ElementType type)
  2658. {
  2659. return ReadPrimitiveValue (type);
  2660. }
  2661. public void ReadCustomAttributeConstructorArguments (CustomAttribute attribute, Collection<ParameterDefinition> parameters)
  2662. {
  2663. var count = parameters.Count;
  2664. if (count == 0)
  2665. return;
  2666. attribute.arguments = new Collection<CustomAttributeArgument> (count);
  2667. for (int i = 0; i < count; i++)
  2668. attribute.arguments.Add (
  2669. ReadCustomAttributeFixedArgument (parameters [i].ParameterType));
  2670. }
  2671. CustomAttributeArgument ReadCustomAttributeFixedArgument (TypeReference type)
  2672. {
  2673. if (type.IsArray)
  2674. return ReadCustomAttributeFixedArrayArgument ((ArrayType) type);
  2675. return ReadCustomAttributeElement (type);
  2676. }
  2677. public void ReadCustomAttributeNamedArguments (ushort count, ref Collection<CustomAttributeNamedArgument> fields, ref Collection<CustomAttributeNamedArgument> properties)
  2678. {
  2679. for (int i = 0; i < count; i++) {
  2680. if (!CanReadMore ())
  2681. return;
  2682. ReadCustomAttributeNamedArgument (ref fields, ref properties);
  2683. }
  2684. }
  2685. void ReadCustomAttributeNamedArgument (ref Collection<CustomAttributeNamedArgument> fields, ref Collection<CustomAttributeNamedArgument> properties)
  2686. {
  2687. var kind = ReadByte ();
  2688. var type = ReadCustomAttributeFieldOrPropType ();
  2689. var name = ReadUTF8String ();
  2690. Collection<CustomAttributeNamedArgument> container;
  2691. switch (kind) {
  2692. case 0x53:
  2693. container = GetCustomAttributeNamedArgumentCollection (ref fields);
  2694. break;
  2695. case 0x54:
  2696. container = GetCustomAttributeNamedArgumentCollection (ref properties);
  2697. break;
  2698. default:
  2699. throw new NotSupportedException ();
  2700. }
  2701. container.Add (new CustomAttributeNamedArgument (name, ReadCustomAttributeFixedArgument (type)));
  2702. }
  2703. static Collection<CustomAttributeNamedArgument> GetCustomAttributeNamedArgumentCollection (ref Collection<CustomAttributeNamedArgument> collection)
  2704. {
  2705. if (collection != null)
  2706. return collection;
  2707. return collection = new Collection<CustomAttributeNamedArgument> ();
  2708. }
  2709. CustomAttributeArgument ReadCustomAttributeFixedArrayArgument (ArrayType type)
  2710. {
  2711. var length = ReadUInt32 ();
  2712. if (length == 0xffffffff)
  2713. return new CustomAttributeArgument (type, null);
  2714. if (length == 0)
  2715. return new CustomAttributeArgument (type, Empty<CustomAttributeArgument>.Array);
  2716. var arguments = new CustomAttributeArgument [length];
  2717. var element_type = type.ElementType;
  2718. for (int i = 0; i < length; i++)
  2719. arguments [i] = ReadCustomAttributeElement (element_type);
  2720. return new CustomAttributeArgument (type, arguments);
  2721. }
  2722. CustomAttributeArgument ReadCustomAttributeElement (TypeReference type)
  2723. {
  2724. if (type.IsArray)
  2725. return ReadCustomAttributeFixedArrayArgument ((ArrayType) type);
  2726. return new CustomAttributeArgument (
  2727. type,
  2728. type.etype == ElementType.Object
  2729. ? ReadCustomAttributeElement (ReadCustomAttributeFieldOrPropType ())
  2730. : ReadCustomAttributeElementValue (type));
  2731. }
  2732. object ReadCustomAttributeElementValue (TypeReference type)
  2733. {
  2734. var etype = type.etype;
  2735. switch (etype) {
  2736. case ElementType.String:
  2737. return ReadUTF8String ();
  2738. case ElementType.None:
  2739. if (type.IsTypeOf ("System", "Type"))
  2740. return ReadTypeReference ();
  2741. return ReadCustomAttributeEnum (type);
  2742. default:
  2743. return ReadPrimitiveValue (etype);
  2744. }
  2745. }
  2746. object ReadPrimitiveValue (ElementType type)
  2747. {
  2748. switch (type) {
  2749. case ElementType.Boolean:
  2750. return ReadByte () == 1;
  2751. case ElementType.I1:
  2752. return (sbyte) ReadByte ();
  2753. case ElementType.U1:
  2754. return ReadByte ();
  2755. case ElementType.Char:
  2756. return (char) ReadUInt16 ();
  2757. case ElementType.I2:
  2758. return ReadInt16 ();
  2759. case ElementType.U2:
  2760. return ReadUInt16 ();
  2761. case ElementType.I4:
  2762. return ReadInt32 ();
  2763. case ElementType.U4:
  2764. return ReadUInt32 ();
  2765. case ElementType.I8:
  2766. return ReadInt64 ();
  2767. case ElementType.U8:
  2768. return ReadUInt64 ();
  2769. case ElementType.R4:
  2770. return ReadSingle ();
  2771. case ElementType.R8:
  2772. return ReadDouble ();
  2773. default:
  2774. throw new NotImplementedException (type.ToString ());
  2775. }
  2776. }
  2777. TypeReference GetPrimitiveType (ElementType etype)
  2778. {
  2779. switch (etype) {
  2780. case ElementType.Boolean:
  2781. return TypeSystem.Boolean;
  2782. case ElementType.Char:
  2783. return TypeSystem.Char;
  2784. case ElementType.I1:
  2785. return TypeSystem.SByte;
  2786. case ElementType.U1:
  2787. return TypeSystem.Byte;
  2788. case ElementType.I2:
  2789. return TypeSystem.Int16;
  2790. case ElementType.U2:
  2791. return TypeSystem.UInt16;
  2792. case ElementType.I4:
  2793. return TypeSystem.Int32;
  2794. case ElementType.U4:
  2795. return TypeSystem.UInt32;
  2796. case ElementType.I8:
  2797. return TypeSystem.Int64;
  2798. case ElementType.U8:
  2799. return TypeSystem.UInt64;
  2800. case ElementType.R4:
  2801. return TypeSystem.Single;
  2802. case ElementType.R8:
  2803. return TypeSystem.Double;
  2804. case ElementType.String:
  2805. return TypeSystem.String;
  2806. default:
  2807. throw new NotImplementedException (etype.ToString ());
  2808. }
  2809. }
  2810. TypeReference ReadCustomAttributeFieldOrPropType ()
  2811. {
  2812. var etype = (ElementType) ReadByte ();
  2813. switch (etype) {
  2814. case ElementType.Boxed:
  2815. return TypeSystem.Object;
  2816. case ElementType.SzArray:
  2817. return new ArrayType (ReadCustomAttributeFieldOrPropType ());
  2818. case ElementType.Enum:
  2819. return ReadTypeReference ();
  2820. case ElementType.Type:
  2821. return TypeSystem.LookupType ("System", "Type");
  2822. default:
  2823. return GetPrimitiveType (etype);
  2824. }
  2825. }
  2826. public TypeReference ReadTypeReference ()
  2827. {
  2828. return TypeParser.ParseType (reader.module, ReadUTF8String ());
  2829. }
  2830. object ReadCustomAttributeEnum (TypeReference enum_type)
  2831. {
  2832. var type = enum_type.CheckedResolve ();
  2833. if (!type.IsEnum)
  2834. throw new ArgumentException ();
  2835. return ReadCustomAttributeElementValue (type.GetEnumUnderlyingType ());
  2836. }
  2837. public SecurityAttribute ReadSecurityAttribute ()
  2838. {
  2839. var attribute = new SecurityAttribute (ReadTypeReference ());
  2840. ReadCompressedUInt32 ();
  2841. ReadCustomAttributeNamedArguments (
  2842. (ushort) ReadCompressedUInt32 (),
  2843. ref attribute.fields,
  2844. ref attribute.properties);
  2845. return attribute;
  2846. }
  2847. public MarshalInfo ReadMarshalInfo ()
  2848. {
  2849. var native = ReadNativeType ();
  2850. switch (native) {
  2851. case NativeType.Array: {
  2852. var array = new ArrayMarshalInfo ();
  2853. if (CanReadMore ())
  2854. array.element_type = ReadNativeType ();
  2855. if (CanReadMore ())
  2856. array.size_parameter_index = (int) ReadCompressedUInt32 ();
  2857. if (CanReadMore ())
  2858. array.size = (int) ReadCompressedUInt32 ();
  2859. if (CanReadMore ())
  2860. array.size_parameter_multiplier = (int) ReadCompressedUInt32 ();
  2861. return array;
  2862. }
  2863. case NativeType.SafeArray: {
  2864. var array = new SafeArrayMarshalInfo ();
  2865. if (CanReadMore ())
  2866. array.element_type = ReadVariantType ();
  2867. return array;
  2868. }
  2869. case NativeType.FixedArray: {
  2870. var array = new FixedArrayMarshalInfo ();
  2871. if (CanReadMore ())
  2872. array.size = (int) ReadCompressedUInt32 ();
  2873. if (CanReadMore ())
  2874. array.element_type = ReadNativeType ();
  2875. return array;
  2876. }
  2877. case NativeType.FixedSysString: {
  2878. var sys_string = new FixedSysStringMarshalInfo ();
  2879. if (CanReadMore ())
  2880. sys_string.size = (int) ReadCompressedUInt32 ();
  2881. return sys_string;
  2882. }
  2883. case NativeType.CustomMarshaler: {
  2884. var marshaler = new CustomMarshalInfo ();
  2885. var guid_value = ReadUTF8String ();
  2886. marshaler.guid = !string.IsNullOrEmpty (guid_value) ? new Guid (guid_value) : Guid.Empty;
  2887. marshaler.unmanaged_type = ReadUTF8String ();
  2888. marshaler.managed_type = ReadTypeReference ();
  2889. marshaler.cookie = ReadUTF8String ();
  2890. return marshaler;
  2891. }
  2892. default:
  2893. return new MarshalInfo (native);
  2894. }
  2895. }
  2896. NativeType ReadNativeType ()
  2897. {
  2898. return (NativeType) ReadByte ();
  2899. }
  2900. VariantType ReadVariantType ()
  2901. {
  2902. return (VariantType) ReadByte ();
  2903. }
  2904. string ReadUTF8String ()
  2905. {
  2906. if (buffer [position] == 0xff) {
  2907. position++;
  2908. return null;
  2909. }
  2910. var length = (int) ReadCompressedUInt32 ();
  2911. if (length == 0)
  2912. return string.Empty;
  2913. if (position + length > buffer.Length)
  2914. return string.Empty;
  2915. var @string = Encoding.UTF8.GetString (buffer, position, length);
  2916. position += length;
  2917. return @string;
  2918. }
  2919. public string ReadDocumentName ()
  2920. {
  2921. var separator = (char) buffer [position];
  2922. position++;
  2923. var builder = new StringBuilder ();
  2924. for (int i = 0; CanReadMore (); i++) {
  2925. if (i > 0 && separator != 0)
  2926. builder.Append (separator);
  2927. uint part = ReadCompressedUInt32 ();
  2928. if (part != 0)
  2929. builder.Append (reader.ReadUTF8StringBlob (part));
  2930. }
  2931. return builder.ToString ();
  2932. }
  2933. public Collection<SequencePoint> ReadSequencePoints (Document document)
  2934. {
  2935. ReadCompressedUInt32 (); // local_sig_token
  2936. if (document == null)
  2937. document = reader.GetDocument (ReadCompressedUInt32 ());
  2938. var offset = 0;
  2939. var start_line = 0;
  2940. var start_column = 0;
  2941. var first_non_hidden = true;
  2942. //there's about 5 compressed int32's per sequenec points. we don't know exactly how many
  2943. //but let's take a conservative guess so we dont end up reallocating the sequence_points collection
  2944. //as it grows.
  2945. var bytes_remaining_for_sequencepoints = sig_length - (position - start);
  2946. var estimated_sequencepoint_amount = (int)bytes_remaining_for_sequencepoints / 5;
  2947. var sequence_points = new Collection<SequencePoint> (estimated_sequencepoint_amount);
  2948. for (var i = 0; CanReadMore (); i++) {
  2949. var delta_il = (int) ReadCompressedUInt32 ();
  2950. if (i > 0 && delta_il == 0) {
  2951. document = reader.GetDocument (ReadCompressedUInt32 ());
  2952. continue;
  2953. }
  2954. offset += delta_il;
  2955. var delta_lines = (int) ReadCompressedUInt32 ();
  2956. var delta_columns = delta_lines == 0
  2957. ? (int) ReadCompressedUInt32 ()
  2958. : ReadCompressedInt32 ();
  2959. if (delta_lines == 0 && delta_columns == 0) {
  2960. sequence_points.Add (new SequencePoint (offset, document) {
  2961. StartLine = 0xfeefee,
  2962. EndLine = 0xfeefee,
  2963. StartColumn = 0,
  2964. EndColumn = 0,
  2965. });
  2966. continue;
  2967. }
  2968. if (first_non_hidden) {
  2969. start_line = (int) ReadCompressedUInt32 ();
  2970. start_column = (int) ReadCompressedUInt32 ();
  2971. } else {
  2972. start_line += ReadCompressedInt32 ();
  2973. start_column += ReadCompressedInt32 ();
  2974. }
  2975. sequence_points.Add (new SequencePoint (offset, document) {
  2976. StartLine = start_line,
  2977. StartColumn = start_column,
  2978. EndLine = start_line + delta_lines,
  2979. EndColumn = start_column + delta_columns,
  2980. });
  2981. first_non_hidden = false;
  2982. }
  2983. return sequence_points;
  2984. }
  2985. public bool CanReadMore ()
  2986. {
  2987. return (position - start) < sig_length;
  2988. }
  2989. }
  2990. }