1 files changed, 104 insertions, 0 deletions
diff --git a/lib/Index/Indexer.cpp b/lib/Index/Indexer.cpp
new file mode 100644
index 000000000000..57bfc5b4fbfd
--- /dev/null
+++ b/lib/Index/Indexer.cpp
@@ -0,0 +1,104 @@
+//===--- Indexer.cpp - IndexProvider implementation -------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  IndexProvider implementation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Index/Indexer.h"
+#include "clang/Index/Program.h"
+#include "clang/Index/Handlers.h"
+#include "clang/Index/TranslationUnit.h"
+#include "ASTVisitor.h"
+#include "clang/AST/DeclBase.h"
+using namespace clang;
+using namespace idx;
+
+namespace {
+
+class EntityIndexer : public EntityHandler {
+  TranslationUnit *TU;
+  Indexer::MapTy &Map;
+
+public:
+  EntityIndexer(TranslationUnit *tu, Indexer::MapTy &map) : TU(tu), Map(map) { }
+
+  virtual void Handle(Entity Ent) {
+    if (Ent.isInternalToTU())
+      return;
+    Map[Ent].insert(TU);
+  }
+};
+
+class SelectorIndexer : public ASTVisitor<SelectorIndexer> {
+  Program &Prog;
+  TranslationUnit *TU;
+  Indexer::SelMapTy &Map;
+
+public:
+  SelectorIndexer(Program &prog, TranslationUnit *tu, Indexer::SelMapTy &map)
+    : Prog(prog), TU(tu), Map(map) { }
+
+  void VisitObjCMethodDecl(ObjCMethodDecl *D) {
+    Map[GlobalSelector::get(D->getSelector(), Prog)].insert(TU);
+    Base::VisitObjCMethodDecl(D);
+  }
+
+  void VisitObjCMessageExpr(ObjCMessageExpr *Node) {
+    Map[GlobalSelector::get(Node->getSelector(), Prog)].insert(TU);
+    Base::VisitObjCMessageExpr(Node);
+  }
+};
+
+} // anonymous namespace
+
+void Indexer::IndexAST(TranslationUnit *TU) {
+  assert(TU && "Passed null TranslationUnit");
+  ASTContext &Ctx = TU->getASTContext();
+  CtxTUMap[&Ctx] = TU;
+  EntityIndexer Idx(TU, Map);
+  Prog.FindEntities(Ctx, Idx);
+
+  SelectorIndexer SelIdx(Prog, TU, SelMap);
+  SelIdx.Visit(Ctx.getTranslationUnitDecl());
+}
+
+void Indexer::GetTranslationUnitsFor(Entity Ent,
+                                     TranslationUnitHandler &Handler) {
+  assert(Ent.isValid() && "Expected valid Entity");
+
+  if (Ent.isInternalToTU()) {
+    Decl *D = Ent.getInternalDecl();
+    CtxTUMapTy::iterator I = CtxTUMap.find(&D->getASTContext());
+    if (I != CtxTUMap.end())
+      Handler.Handle(I->second);
+    return;
+  }
+
+  MapTy::iterator I = Map.find(Ent);
+  if (I == Map.end())
+    return;
+
+  TUSetTy &Set = I->second;
+  for (TUSetTy::iterator I = Set.begin(), E = Set.end(); I != E; ++I)
+    Handler.Handle(*I);
+}
+
+void Indexer::GetTranslationUnitsFor(GlobalSelector Sel,
+                                    TranslationUnitHandler &Handler) {
+  assert(Sel.isValid() && "Expected valid GlobalSelector");
+
+  SelMapTy::iterator I = SelMap.find(Sel);
+  if (I == SelMap.end())
+    return;
+
+  TUSetTy &Set = I->second;
+  for (TUSetTy::iterator I = Set.begin(), E = Set.end(); I != E; ++I)
+    Handler.Handle(*I);
+}