1 //===- CIndexInclusionStack.cpp - Clang-C Source Indexing Library ---------===//
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 // This file defines a callback mechanism for clients to get the inclusion
11 // stack from a translation unit.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "CIndexer.h"
16 #include "CXSourceLocation.h"
17 #include "CXTranslationUnit.h"
18 #include "clang/AST/DeclVisitor.h"
19 #include "clang/Frontend/ASTUnit.h"
20 #include "llvm/ADT/SmallString.h"
21 #include "llvm/Support/raw_ostream.h"
22 using namespace clang;
23
24 extern "C" {
clang_getInclusions(CXTranslationUnit TU,CXInclusionVisitor CB,CXClientData clientData)25 void clang_getInclusions(CXTranslationUnit TU, CXInclusionVisitor CB,
26 CXClientData clientData) {
27
28 ASTUnit *CXXUnit = cxtu::getASTUnit(TU);
29 SourceManager &SM = CXXUnit->getSourceManager();
30 ASTContext &Ctx = CXXUnit->getASTContext();
31
32 SmallVector<CXSourceLocation, 10> InclusionStack;
33 unsigned n = SM.local_sloc_entry_size();
34
35 // In the case where all the SLocEntries are in an external source, traverse
36 // those SLocEntries as well. This is the case where we are looking
37 // at the inclusion stack of an AST/PCH file.
38 const SrcMgr::SLocEntry &(SourceManager::*Getter)(unsigned, bool*) const;
39 if (n == 1) {
40 Getter = &SourceManager::getLoadedSLocEntry;
41 n = SM.loaded_sloc_entry_size();
42 } else
43 Getter = &SourceManager::getLocalSLocEntry;
44
45 for (unsigned i = 0 ; i < n ; ++i) {
46 bool Invalid = false;
47 const SrcMgr::SLocEntry &SL = (SM.*Getter)(i, &Invalid);
48
49 if (!SL.isFile() || Invalid)
50 continue;
51
52 const SrcMgr::FileInfo &FI = SL.getFile();
53 if (!FI.getContentCache()->OrigEntry)
54 continue;
55
56 // Build the inclusion stack.
57 SourceLocation L = FI.getIncludeLoc();
58 InclusionStack.clear();
59 while (L.isValid()) {
60 PresumedLoc PLoc = SM.getPresumedLoc(L);
61 InclusionStack.push_back(cxloc::translateSourceLocation(Ctx, L));
62 L = PLoc.isValid()? PLoc.getIncludeLoc() : SourceLocation();
63 }
64
65 // Callback to the client.
66 // FIXME: We should have a function to construct CXFiles.
67 CB(static_cast<CXFile>(
68 const_cast<FileEntry *>(FI.getContentCache()->OrigEntry)),
69 InclusionStack.data(), InclusionStack.size(), clientData);
70 }
71 }
72 } // end extern C
73