Check in LLVM r95781.
diff --git a/tools/CIndex/CIndexInclusionStack.cpp b/tools/CIndex/CIndexInclusionStack.cpp
new file mode 100644
index 0000000..4a884e5
--- /dev/null
+++ b/tools/CIndex/CIndexInclusionStack.cpp
@@ -0,0 +1,65 @@
+//===- CIndexInclusionStack.cpp - Clang-C Source Indexing Library ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines a callback mechanism for clients to get the inclusion
+// stack from a translation unit.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CIndexer.h"
+#include "CXSourceLocation.h"
+#include "clang/AST/DeclVisitor.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/raw_ostream.h"
+
+extern "C" {
+void clang_getInclusions(CXTranslationUnit TU, CXInclusionVisitor CB,
+ CXClientData clientData) {
+
+ ASTUnit *CXXUnit = static_cast<ASTUnit *>(TU);
+ SourceManager &SM = CXXUnit->getSourceManager();
+ ASTContext &Ctx = CXXUnit->getASTContext();
+
+ llvm::SmallVector<CXSourceLocation, 10> InclusionStack;
+ unsigned i = SM.sloc_loaded_entry_size();
+ unsigned n = SM.sloc_entry_size();
+
+ // In the case where all the SLocEntries are in an external source, traverse
+ // those SLocEntries as well. This is the case where we are looking
+ // at the inclusion stack of an AST/PCH file.
+ if (i >= n)
+ i = 0;
+
+ for ( ; i < n ; ++i) {
+
+ const SrcMgr::SLocEntry &SL = SM.getSLocEntry(i);
+
+ if (!SL.isFile())
+ continue;
+
+ const SrcMgr::FileInfo &FI = SL.getFile();
+ if (!FI.getContentCache()->Entry)
+ continue;
+
+ // Build the inclusion stack.
+ SourceLocation L = FI.getIncludeLoc();
+ InclusionStack.clear();
+ while (L.isValid()) {
+ PresumedLoc PLoc = SM.getPresumedLoc(L);
+ InclusionStack.push_back(cxloc::translateSourceLocation(Ctx, L));
+ L = PLoc.getIncludeLoc();
+ }
+
+ // Callback to the client.
+ // FIXME: We should have a function to construct CXFiles.
+ CB((CXFile) FI.getContentCache()->Entry,
+ InclusionStack.data(), InclusionStack.size(), clientData);
+ }
+}
+} // end extern C