Indexing.cpp revision f59edb96b2d0bfe612b732f19519ab84bb995bd4 
1//===- CIndexHigh.cpp - Higher level API functions ------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "IndexingContext.h"
11#include "CIndexDiagnostic.h"
12#include "CIndexer.h"
13#include "CXCursor.h"
14#include "CXSourceLocation.h"
15#include "CXString.h"
16#include "CXTranslationUnit.h"
17#include "clang/AST/ASTConsumer.h"
18#include "clang/AST/DeclVisitor.h"
19#include "clang/Frontend/ASTUnit.h"
20#include "clang/Frontend/CompilerInstance.h"
21#include "clang/Frontend/CompilerInvocation.h"
22#include "clang/Frontend/FrontendAction.h"
23#include "clang/Frontend/Utils.h"
24#include "clang/Lex/PPCallbacks.h"
25#include "clang/Lex/Preprocessor.h"
26#include "clang/Sema/SemaConsumer.h"
27#include "llvm/Support/CrashRecoveryContext.h"
28#include "llvm/Support/MemoryBuffer.h"
29
30using namespace clang;
31using namespace cxstring;
32using namespace cxtu;
33using namespace cxindex;
34
35static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx);
36
37namespace {
38
39//===----------------------------------------------------------------------===//
40// IndexPPCallbacks
41//===----------------------------------------------------------------------===//
42
43class IndexPPCallbacks : public PPCallbacks {
44  Preprocessor &PP;
45  IndexingContext &IndexCtx;
46  bool IsMainFileEntered;
47
48public:
49  IndexPPCallbacks(Preprocessor &PP, IndexingContext &indexCtx)
50    : PP(PP), IndexCtx(indexCtx), IsMainFileEntered(false) { }
51
52  virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason,
53                          SrcMgr::CharacteristicKind FileType, FileID PrevFID) {
54    if (IsMainFileEntered)
55      return;
56
57    SourceManager &SM = PP.getSourceManager();
58    SourceLocation MainFileLoc = SM.getLocForStartOfFile(SM.getMainFileID());
59
60    if (Loc == MainFileLoc && Reason == PPCallbacks::EnterFile) {
61      IsMainFileEntered = true;
62      IndexCtx.enteredMainFile(SM.getFileEntryForID(SM.getMainFileID()));
63    }
64  }
65
66  virtual void InclusionDirective(SourceLocation HashLoc,
67                                  const Token &IncludeTok,
68                                  StringRef FileName,
69                                  bool IsAngled,
70                                  CharSourceRange FilenameRange,
71                                  const FileEntry *File,
72                                  StringRef SearchPath,
73                                  StringRef RelativePath,
74                                  const Module *Imported) {
75    bool isImport = (IncludeTok.is(tok::identifier) &&
76            IncludeTok.getIdentifierInfo()->getPPKeywordID() == tok::pp_import);
77    IndexCtx.ppIncludedFile(HashLoc, FileName, File, isImport, IsAngled,
78                            Imported);
79  }
80
81  /// MacroDefined - This hook is called whenever a macro definition is seen.
82  virtual void MacroDefined(const Token &Id, const MacroInfo *MI) {
83  }
84
85  /// MacroUndefined - This hook is called whenever a macro #undef is seen.
86  /// MI is released immediately following this callback.
87  virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) {
88  }
89
90  /// MacroExpands - This is called by when a macro invocation is found.
91  virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo* MI,
92                            SourceRange Range) {
93  }
94
95  /// SourceRangeSkipped - This hook is called when a source range is skipped.
96  /// \param Range The SourceRange that was skipped. The range begins at the
97  /// #if/#else directive and ends after the #endif/#else directive.
98  virtual void SourceRangeSkipped(SourceRange Range) {
99  }
100};
101
102//===----------------------------------------------------------------------===//
103// IndexingConsumer
104//===----------------------------------------------------------------------===//
105
106class IndexingConsumer : public ASTConsumer {
107  IndexingContext &IndexCtx;
108
109public:
110  explicit IndexingConsumer(IndexingContext &indexCtx)
111    : IndexCtx(indexCtx) { }
112
113  // ASTConsumer Implementation
114
115  virtual void Initialize(ASTContext &Context) {
116    IndexCtx.setASTContext(Context);
117    IndexCtx.startedTranslationUnit();
118  }
119
120  virtual void HandleTranslationUnit(ASTContext &Ctx) {
121  }
122
123  virtual bool HandleTopLevelDecl(DeclGroupRef DG) {
124    IndexCtx.indexDeclGroupRef(DG);
125    return !IndexCtx.shouldAbort();
126  }
127
128  /// \brief Handle the specified top-level declaration that occurred inside
129  /// and ObjC container.
130  virtual void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) {
131    // They will be handled after the interface is seen first.
132    IndexCtx.addTUDeclInObjCContainer(D);
133  }
134
135  /// \brief This is called by the AST reader when deserializing things.
136  /// The default implementation forwards to HandleTopLevelDecl but we don't
137  /// care about them when indexing, so have an empty definition.
138  virtual void HandleInterestingDecl(DeclGroupRef D) {}
139
140  virtual void HandleTagDeclDefinition(TagDecl *D) {
141    if (!IndexCtx.shouldIndexImplicitTemplateInsts())
142      return;
143
144    if (IndexCtx.isTemplateImplicitInstantiation(D))
145      IndexCtx.indexDecl(D);
146  }
147
148  virtual void HandleCXXImplicitFunctionInstantiation(FunctionDecl *D) {
149    if (!IndexCtx.shouldIndexImplicitTemplateInsts())
150      return;
151
152    IndexCtx.indexDecl(D);
153  }
154};
155
156//===----------------------------------------------------------------------===//
157// CaptureDiagnosticConsumer
158//===----------------------------------------------------------------------===//
159
160class CaptureDiagnosticConsumer : public DiagnosticConsumer {
161  SmallVector<StoredDiagnostic, 4> Errors;
162public:
163
164  virtual void HandleDiagnostic(DiagnosticsEngine::Level level,
165                                const Diagnostic &Info) {
166    if (level >= DiagnosticsEngine::Error)
167      Errors.push_back(StoredDiagnostic(level, Info));
168  }
169
170  DiagnosticConsumer *clone(DiagnosticsEngine &Diags) const {
171    return new IgnoringDiagConsumer();
172  }
173};
174
175//===----------------------------------------------------------------------===//
176// IndexingFrontendAction
177//===----------------------------------------------------------------------===//
178
179class IndexingFrontendAction : public ASTFrontendAction {
180  IndexingContext IndexCtx;
181  CXTranslationUnit CXTU;
182
183public:
184  IndexingFrontendAction(CXClientData clientData,
185                         IndexerCallbacks &indexCallbacks,
186                         unsigned indexOptions,
187                         CXTranslationUnit cxTU)
188    : IndexCtx(clientData, indexCallbacks, indexOptions, cxTU),
189      CXTU(cxTU) { }
190
191  virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
192                                         StringRef InFile) {
193    PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
194
195    if (!PPOpts.ImplicitPCHInclude.empty()) {
196      IndexCtx.importedPCH(
197                        CI.getFileManager().getFile(PPOpts.ImplicitPCHInclude));
198    }
199
200    IndexCtx.setASTContext(CI.getASTContext());
201    Preprocessor &PP = CI.getPreprocessor();
202    PP.addPPCallbacks(new IndexPPCallbacks(PP, IndexCtx));
203    IndexCtx.setPreprocessor(PP);
204    return new IndexingConsumer(IndexCtx);
205  }
206
207  virtual void EndSourceFileAction() {
208    indexDiagnostics(CXTU, IndexCtx);
209  }
210
211  virtual TranslationUnitKind getTranslationUnitKind() {
212    if (IndexCtx.shouldIndexImplicitTemplateInsts())
213      return TU_Complete;
214    else
215      return TU_Prefix;
216  }
217  virtual bool hasCodeCompletionSupport() const { return false; }
218};
219
220//===----------------------------------------------------------------------===//
221// clang_indexSourceFileUnit Implementation
222//===----------------------------------------------------------------------===//
223
224struct IndexSourceFileInfo {
225  CXIndexAction idxAction;
226  CXClientData client_data;
227  IndexerCallbacks *index_callbacks;
228  unsigned index_callbacks_size;
229  unsigned index_options;
230  const char *source_filename;
231  const char *const *command_line_args;
232  int num_command_line_args;
233  struct CXUnsavedFile *unsaved_files;
234  unsigned num_unsaved_files;
235  CXTranslationUnit *out_TU;
236  unsigned TU_options;
237  int result;
238};
239
240struct MemBufferOwner {
241  SmallVector<const llvm::MemoryBuffer *, 8> Buffers;
242
243  ~MemBufferOwner() {
244    for (SmallVectorImpl<const llvm::MemoryBuffer *>::iterator
245           I = Buffers.begin(), E = Buffers.end(); I != E; ++I)
246      delete *I;
247  }
248};
249
250} // anonymous namespace
251
252static void clang_indexSourceFile_Impl(void *UserData) {
253  IndexSourceFileInfo *ITUI =
254    static_cast<IndexSourceFileInfo*>(UserData);
255  CXIndex CIdx = (CXIndex)ITUI->idxAction;
256  CXClientData client_data = ITUI->client_data;
257  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
258  unsigned index_callbacks_size = ITUI->index_callbacks_size;
259  unsigned index_options = ITUI->index_options;
260  const char *source_filename = ITUI->source_filename;
261  const char * const *command_line_args = ITUI->command_line_args;
262  int num_command_line_args = ITUI->num_command_line_args;
263  struct CXUnsavedFile *unsaved_files = ITUI->unsaved_files;
264  unsigned num_unsaved_files = ITUI->num_unsaved_files;
265  CXTranslationUnit *out_TU  = ITUI->out_TU;
266  unsigned TU_options = ITUI->TU_options;
267  ITUI->result = 1; // init as error.
268
269  if (out_TU)
270    *out_TU = 0;
271  bool requestedToGetTU = (out_TU != 0);
272
273  if (!CIdx)
274    return;
275  if (!client_index_callbacks || index_callbacks_size == 0)
276    return;
277
278  IndexerCallbacks CB;
279  memset(&CB, 0, sizeof(CB));
280  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
281                                  ? index_callbacks_size : sizeof(CB);
282  memcpy(&CB, client_index_callbacks, ClientCBSize);
283
284  CIndexer *CXXIdx = static_cast<CIndexer *>(CIdx);
285
286  if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
287    setThreadBackgroundPriority();
288
289  CaptureDiagnosticConsumer *CaptureDiag = new CaptureDiagnosticConsumer();
290
291  // Configure the diagnostics.
292  IntrusiveRefCntPtr<DiagnosticsEngine>
293    Diags(CompilerInstance::createDiagnostics(new DiagnosticOptions,
294                                              num_command_line_args,
295                                              command_line_args,
296                                              CaptureDiag,
297                                              /*ShouldOwnClient=*/true,
298                                              /*ShouldCloneClient=*/false));
299
300  // Recover resources if we crash before exiting this function.
301  llvm::CrashRecoveryContextCleanupRegistrar<DiagnosticsEngine,
302    llvm::CrashRecoveryContextReleaseRefCleanup<DiagnosticsEngine> >
303    DiagCleanup(Diags.getPtr());
304
305  OwningPtr<std::vector<const char *> >
306    Args(new std::vector<const char*>());
307
308  // Recover resources if we crash before exiting this method.
309  llvm::CrashRecoveryContextCleanupRegistrar<std::vector<const char*> >
310    ArgsCleanup(Args.get());
311
312  Args->insert(Args->end(), command_line_args,
313               command_line_args + num_command_line_args);
314
315  // The 'source_filename' argument is optional.  If the caller does not
316  // specify it then it is assumed that the source file is specified
317  // in the actual argument list.
318  // Put the source file after command_line_args otherwise if '-x' flag is
319  // present it will be unused.
320  if (source_filename)
321    Args->push_back(source_filename);
322
323  IntrusiveRefCntPtr<CompilerInvocation>
324    CInvok(createInvocationFromCommandLine(*Args, Diags));
325
326  if (!CInvok)
327    return;
328
329  // Recover resources if we crash before exiting this function.
330  llvm::CrashRecoveryContextCleanupRegistrar<CompilerInvocation,
331    llvm::CrashRecoveryContextReleaseRefCleanup<CompilerInvocation> >
332    CInvokCleanup(CInvok.getPtr());
333
334  if (CInvok->getFrontendOpts().Inputs.empty())
335    return;
336
337  OwningPtr<MemBufferOwner> BufOwner(new MemBufferOwner());
338
339  // Recover resources if we crash before exiting this method.
340  llvm::CrashRecoveryContextCleanupRegistrar<MemBufferOwner>
341    BufOwnerCleanup(BufOwner.get());
342
343  for (unsigned I = 0; I != num_unsaved_files; ++I) {
344    StringRef Data(unsaved_files[I].Contents, unsaved_files[I].Length);
345    const llvm::MemoryBuffer *Buffer
346      = llvm::MemoryBuffer::getMemBufferCopy(Data, unsaved_files[I].Filename);
347    CInvok->getPreprocessorOpts().addRemappedFile(unsaved_files[I].Filename, Buffer);
348    BufOwner->Buffers.push_back(Buffer);
349  }
350
351  // Since libclang is primarily used by batch tools dealing with
352  // (often very broken) source code, where spell-checking can have a
353  // significant negative impact on performance (particularly when
354  // precompiled headers are involved), we disable it.
355  CInvok->getLangOpts()->SpellChecking = false;
356
357  if (index_options & CXIndexOpt_SuppressWarnings)
358    CInvok->getDiagnosticOpts().IgnoreWarnings = true;
359
360  ASTUnit *Unit = ASTUnit::create(CInvok.getPtr(), Diags,
361                                  /*CaptureDiagnostics=*/true,
362                                  /*UserFilesAreVolatile=*/true);
363  OwningPtr<CXTUOwner> CXTU(new CXTUOwner(MakeCXTranslationUnit(CXXIdx, Unit)));
364
365  // Recover resources if we crash before exiting this method.
366  llvm::CrashRecoveryContextCleanupRegistrar<CXTUOwner>
367    CXTUCleanup(CXTU.get());
368
369  OwningPtr<IndexingFrontendAction> IndexAction;
370  IndexAction.reset(new IndexingFrontendAction(client_data, CB,
371                                               index_options, CXTU->getTU()));
372
373  // Recover resources if we crash before exiting this method.
374  llvm::CrashRecoveryContextCleanupRegistrar<IndexingFrontendAction>
375    IndexActionCleanup(IndexAction.get());
376
377  bool Persistent = requestedToGetTU;
378  bool OnlyLocalDecls = false;
379  bool PrecompilePreamble = false;
380  bool CacheCodeCompletionResults = false;
381  PreprocessorOptions &PPOpts = CInvok->getPreprocessorOpts();
382  PPOpts.AllowPCHWithCompilerErrors = true;
383
384  if (requestedToGetTU) {
385    OnlyLocalDecls = CXXIdx->getOnlyLocalDecls();
386    PrecompilePreamble = TU_options & CXTranslationUnit_PrecompiledPreamble;
387    // FIXME: Add a flag for modules.
388    CacheCodeCompletionResults
389      = TU_options & CXTranslationUnit_CacheCompletionResults;
390  }
391
392  if (TU_options & CXTranslationUnit_DetailedPreprocessingRecord) {
393    PPOpts.DetailedRecord = true;
394  }
395
396  if (!requestedToGetTU && !CInvok->getLangOpts()->Modules)
397    PPOpts.DetailedRecord = false;
398
399  DiagnosticErrorTrap DiagTrap(*Diags);
400  bool Success = ASTUnit::LoadFromCompilerInvocationAction(CInvok.getPtr(), Diags,
401                                                       IndexAction.get(),
402                                                       Unit,
403                                                       Persistent,
404                                                CXXIdx->getClangResourcesPath(),
405                                                       OnlyLocalDecls,
406                                                    /*CaptureDiagnostics=*/true,
407                                                       PrecompilePreamble,
408                                                    CacheCodeCompletionResults,
409                                 /*IncludeBriefCommentsInCodeCompletion=*/false,
410                                                 /*UserFilesAreVolatile=*/true);
411  if (DiagTrap.hasErrorOccurred() && CXXIdx->getDisplayDiagnostics())
412    printDiagsToStderr(Unit);
413
414  if (!Success)
415    return;
416
417  if (out_TU)
418    *out_TU = CXTU->takeTU();
419
420  ITUI->result = 0; // success.
421}
422
423//===----------------------------------------------------------------------===//
424// clang_indexTranslationUnit Implementation
425//===----------------------------------------------------------------------===//
426
427namespace {
428
429struct IndexTranslationUnitInfo {
430  CXIndexAction idxAction;
431  CXClientData client_data;
432  IndexerCallbacks *index_callbacks;
433  unsigned index_callbacks_size;
434  unsigned index_options;
435  CXTranslationUnit TU;
436  int result;
437};
438
439} // anonymous namespace
440
441static void indexPreprocessingRecord(ASTUnit &Unit, IndexingContext &IdxCtx) {
442  Preprocessor &PP = Unit.getPreprocessor();
443  if (!PP.getPreprocessingRecord())
444    return;
445
446  // FIXME: Only deserialize inclusion directives.
447
448  PreprocessingRecord::iterator I, E;
449  llvm::tie(I, E) = Unit.getLocalPreprocessingEntities();
450
451  bool isModuleFile = Unit.isModuleFile();
452  for (; I != E; ++I) {
453    PreprocessedEntity *PPE = *I;
454
455    if (InclusionDirective *ID = dyn_cast<InclusionDirective>(PPE)) {
456      SourceLocation Loc = ID->getSourceRange().getBegin();
457      // Modules have synthetic main files as input, give an invalid location
458      // if the location points to such a file.
459      if (isModuleFile && Unit.isInMainFileID(Loc))
460        Loc = SourceLocation();
461      IdxCtx.ppIncludedFile(Loc, ID->getFileName(),
462                            ID->getFile(),
463                            ID->getKind() == InclusionDirective::Import,
464                            !ID->wasInQuotes(), ID->importedModule());
465    }
466  }
467}
468
469static bool topLevelDeclVisitor(void *context, const Decl *D) {
470  IndexingContext &IdxCtx = *static_cast<IndexingContext*>(context);
471  IdxCtx.indexTopLevelDecl(D);
472  if (IdxCtx.shouldAbort())
473    return false;
474  return true;
475}
476
477static void indexTranslationUnit(ASTUnit &Unit, IndexingContext &IdxCtx) {
478  Unit.visitLocalTopLevelDecls(&IdxCtx, topLevelDeclVisitor);
479}
480
481static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx) {
482  if (!IdxCtx.hasDiagnosticCallback())
483    return;
484
485  CXDiagnosticSetImpl *DiagSet = cxdiag::lazyCreateDiags(TU);
486  IdxCtx.handleDiagnosticSet(DiagSet);
487}
488
489static void clang_indexTranslationUnit_Impl(void *UserData) {
490  IndexTranslationUnitInfo *ITUI =
491    static_cast<IndexTranslationUnitInfo*>(UserData);
492  CXTranslationUnit TU = ITUI->TU;
493  CXClientData client_data = ITUI->client_data;
494  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
495  unsigned index_callbacks_size = ITUI->index_callbacks_size;
496  unsigned index_options = ITUI->index_options;
497  ITUI->result = 1; // init as error.
498
499  if (!TU)
500    return;
501  if (!client_index_callbacks || index_callbacks_size == 0)
502    return;
503
504  CIndexer *CXXIdx = (CIndexer*)TU->CIdx;
505  if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
506    setThreadBackgroundPriority();
507
508  IndexerCallbacks CB;
509  memset(&CB, 0, sizeof(CB));
510  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
511                                  ? index_callbacks_size : sizeof(CB);
512  memcpy(&CB, client_index_callbacks, ClientCBSize);
513
514  OwningPtr<IndexingContext> IndexCtx;
515  IndexCtx.reset(new IndexingContext(client_data, CB, index_options, TU));
516
517  // Recover resources if we crash before exiting this method.
518  llvm::CrashRecoveryContextCleanupRegistrar<IndexingContext>
519    IndexCtxCleanup(IndexCtx.get());
520
521  OwningPtr<IndexingConsumer> IndexConsumer;
522  IndexConsumer.reset(new IndexingConsumer(*IndexCtx));
523
524  // Recover resources if we crash before exiting this method.
525  llvm::CrashRecoveryContextCleanupRegistrar<IndexingConsumer>
526    IndexConsumerCleanup(IndexConsumer.get());
527
528  ASTUnit *Unit = static_cast<ASTUnit *>(TU->TUData);
529  if (!Unit)
530    return;
531
532  ASTUnit::ConcurrencyCheck Check(*Unit);
533
534  if (const FileEntry *PCHFile = Unit->getPCHFile())
535    IndexCtx->importedPCH(PCHFile);
536
537  FileManager &FileMgr = Unit->getFileManager();
538
539  if (Unit->getOriginalSourceFileName().empty())
540    IndexCtx->enteredMainFile(0);
541  else
542    IndexCtx->enteredMainFile(FileMgr.getFile(Unit->getOriginalSourceFileName()));
543
544  IndexConsumer->Initialize(Unit->getASTContext());
545
546  indexPreprocessingRecord(*Unit, *IndexCtx);
547  indexTranslationUnit(*Unit, *IndexCtx);
548  indexDiagnostics(TU, *IndexCtx);
549
550  ITUI->result = 0;
551}
552
553//===----------------------------------------------------------------------===//
554// libclang public APIs.
555//===----------------------------------------------------------------------===//
556
557extern "C" {
558
559int clang_index_isEntityObjCContainerKind(CXIdxEntityKind K) {
560  return CXIdxEntity_ObjCClass <= K && K <= CXIdxEntity_ObjCCategory;
561}
562
563const CXIdxObjCContainerDeclInfo *
564clang_index_getObjCContainerDeclInfo(const CXIdxDeclInfo *DInfo) {
565  if (!DInfo)
566    return 0;
567
568  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
569  if (const ObjCContainerDeclInfo *
570        ContInfo = dyn_cast<ObjCContainerDeclInfo>(DI))
571    return &ContInfo->ObjCContDeclInfo;
572
573  return 0;
574}
575
576const CXIdxObjCInterfaceDeclInfo *
577clang_index_getObjCInterfaceDeclInfo(const CXIdxDeclInfo *DInfo) {
578  if (!DInfo)
579    return 0;
580
581  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
582  if (const ObjCInterfaceDeclInfo *
583        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
584    return &InterInfo->ObjCInterDeclInfo;
585
586  return 0;
587}
588
589const CXIdxObjCCategoryDeclInfo *
590clang_index_getObjCCategoryDeclInfo(const CXIdxDeclInfo *DInfo){
591  if (!DInfo)
592    return 0;
593
594  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
595  if (const ObjCCategoryDeclInfo *
596        CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
597    return &CatInfo->ObjCCatDeclInfo;
598
599  return 0;
600}
601
602const CXIdxObjCProtocolRefListInfo *
603clang_index_getObjCProtocolRefListInfo(const CXIdxDeclInfo *DInfo) {
604  if (!DInfo)
605    return 0;
606
607  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
608
609  if (const ObjCInterfaceDeclInfo *
610        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
611    return InterInfo->ObjCInterDeclInfo.protocols;
612
613  if (const ObjCProtocolDeclInfo *
614        ProtInfo = dyn_cast<ObjCProtocolDeclInfo>(DI))
615    return &ProtInfo->ObjCProtoRefListInfo;
616
617  if (const ObjCCategoryDeclInfo *CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
618    return CatInfo->ObjCCatDeclInfo.protocols;
619
620  return 0;
621}
622
623const CXIdxObjCPropertyDeclInfo *
624clang_index_getObjCPropertyDeclInfo(const CXIdxDeclInfo *DInfo) {
625  if (!DInfo)
626    return 0;
627
628  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
629  if (const ObjCPropertyDeclInfo *PropInfo = dyn_cast<ObjCPropertyDeclInfo>(DI))
630    return &PropInfo->ObjCPropDeclInfo;
631
632  return 0;
633}
634
635const CXIdxIBOutletCollectionAttrInfo *
636clang_index_getIBOutletCollectionAttrInfo(const CXIdxAttrInfo *AInfo) {
637  if (!AInfo)
638    return 0;
639
640  const AttrInfo *DI = static_cast<const AttrInfo *>(AInfo);
641  if (const IBOutletCollectionInfo *
642        IBInfo = dyn_cast<IBOutletCollectionInfo>(DI))
643    return &IBInfo->IBCollInfo;
644
645  return 0;
646}
647
648const CXIdxCXXClassDeclInfo *
649clang_index_getCXXClassDeclInfo(const CXIdxDeclInfo *DInfo) {
650  if (!DInfo)
651    return 0;
652
653  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
654  if (const CXXClassDeclInfo *ClassInfo = dyn_cast<CXXClassDeclInfo>(DI))
655    return &ClassInfo->CXXClassInfo;
656
657  return 0;
658}
659
660CXIdxClientContainer
661clang_index_getClientContainer(const CXIdxContainerInfo *info) {
662  if (!info)
663    return 0;
664  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
665  return Container->IndexCtx->getClientContainerForDC(Container->DC);
666}
667
668void clang_index_setClientContainer(const CXIdxContainerInfo *info,
669                                    CXIdxClientContainer client) {
670  if (!info)
671    return;
672  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
673  Container->IndexCtx->addContainerInMap(Container->DC, client);
674}
675
676CXIdxClientEntity clang_index_getClientEntity(const CXIdxEntityInfo *info) {
677  if (!info)
678    return 0;
679  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
680  return Entity->IndexCtx->getClientEntity(Entity->Dcl);
681}
682
683void clang_index_setClientEntity(const CXIdxEntityInfo *info,
684                                 CXIdxClientEntity client) {
685  if (!info)
686    return;
687  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
688  Entity->IndexCtx->setClientEntity(Entity->Dcl, client);
689}
690
691CXIndexAction clang_IndexAction_create(CXIndex CIdx) {
692  // For now, CXIndexAction is featureless.
693  return CIdx;
694}
695
696void clang_IndexAction_dispose(CXIndexAction idxAction) {
697  // For now, CXIndexAction is featureless.
698}
699
700int clang_indexSourceFile(CXIndexAction idxAction,
701                          CXClientData client_data,
702                          IndexerCallbacks *index_callbacks,
703                          unsigned index_callbacks_size,
704                          unsigned index_options,
705                          const char *source_filename,
706                          const char * const *command_line_args,
707                          int num_command_line_args,
708                          struct CXUnsavedFile *unsaved_files,
709                          unsigned num_unsaved_files,
710                          CXTranslationUnit *out_TU,
711                          unsigned TU_options) {
712
713  IndexSourceFileInfo ITUI = { idxAction, client_data, index_callbacks,
714                               index_callbacks_size, index_options,
715                               source_filename, command_line_args,
716                               num_command_line_args, unsaved_files,
717                               num_unsaved_files, out_TU, TU_options, 0 };
718
719  if (getenv("LIBCLANG_NOTHREADS")) {
720    clang_indexSourceFile_Impl(&ITUI);
721    return ITUI.result;
722  }
723
724  llvm::CrashRecoveryContext CRC;
725
726  if (!RunSafely(CRC, clang_indexSourceFile_Impl, &ITUI)) {
727    fprintf(stderr, "libclang: crash detected during indexing source file: {\n");
728    fprintf(stderr, "  'source_filename' : '%s'\n", source_filename);
729    fprintf(stderr, "  'command_line_args' : [");
730    for (int i = 0; i != num_command_line_args; ++i) {
731      if (i)
732        fprintf(stderr, ", ");
733      fprintf(stderr, "'%s'", command_line_args[i]);
734    }
735    fprintf(stderr, "],\n");
736    fprintf(stderr, "  'unsaved_files' : [");
737    for (unsigned i = 0; i != num_unsaved_files; ++i) {
738      if (i)
739        fprintf(stderr, ", ");
740      fprintf(stderr, "('%s', '...', %ld)", unsaved_files[i].Filename,
741              unsaved_files[i].Length);
742    }
743    fprintf(stderr, "],\n");
744    fprintf(stderr, "  'options' : %d,\n", TU_options);
745    fprintf(stderr, "}\n");
746
747    return 1;
748  } else if (getenv("LIBCLANG_RESOURCE_USAGE")) {
749    if (out_TU)
750      PrintLibclangResourceUsage(*out_TU);
751  }
752
753  return ITUI.result;
754}
755
756int clang_indexTranslationUnit(CXIndexAction idxAction,
757                               CXClientData client_data,
758                               IndexerCallbacks *index_callbacks,
759                               unsigned index_callbacks_size,
760                               unsigned index_options,
761                               CXTranslationUnit TU) {
762
763  IndexTranslationUnitInfo ITUI = { idxAction, client_data, index_callbacks,
764                                    index_callbacks_size, index_options, TU,
765                                    0 };
766
767  if (getenv("LIBCLANG_NOTHREADS")) {
768    clang_indexTranslationUnit_Impl(&ITUI);
769    return ITUI.result;
770  }
771
772  llvm::CrashRecoveryContext CRC;
773
774  if (!RunSafely(CRC, clang_indexTranslationUnit_Impl, &ITUI)) {
775    fprintf(stderr, "libclang: crash detected during indexing TU\n");
776
777    return 1;
778  }
779
780  return ITUI.result;
781}
782
783void clang_indexLoc_getFileLocation(CXIdxLoc location,
784                                    CXIdxClientFile *indexFile,
785                                    CXFile *file,
786                                    unsigned *line,
787                                    unsigned *column,
788                                    unsigned *offset) {
789  if (indexFile) *indexFile = 0;
790  if (file)   *file = 0;
791  if (line)   *line = 0;
792  if (column) *column = 0;
793  if (offset) *offset = 0;
794
795  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
796  if (!location.ptr_data[0] || Loc.isInvalid())
797    return;
798
799  IndexingContext &IndexCtx =
800      *static_cast<IndexingContext*>(location.ptr_data[0]);
801  IndexCtx.translateLoc(Loc, indexFile, file, line, column, offset);
802}
803
804CXSourceLocation clang_indexLoc_getCXSourceLocation(CXIdxLoc location) {
805  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
806  if (!location.ptr_data[0] || Loc.isInvalid())
807    return clang_getNullLocation();
808
809  IndexingContext &IndexCtx =
810      *static_cast<IndexingContext*>(location.ptr_data[0]);
811  return cxloc::translateSourceLocation(IndexCtx.getASTContext(), Loc);
812}
813
814} // end: extern "C"
815
816