Add the clang library to the repo (with some of my changes, too).

1 files changed, 1156 insertions, 0 deletions

diff --git a/clang/tools/libclang/CXCursor.cpp b/clang/tools/libclang/CXCursor.cpp
new file mode 100644
index 0000000..a298759
--- /dev/null
+++ b/clang/tools/libclang/CXCursor.cpp
@@ -0,0 +1,1156 @@
+//===- CXCursor.cpp - Routines for manipulating CXCursors -----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines routines for manipulating CXCursors. It should be the
+// only file that has internal knowledge of the encoding of the data in
+// CXCursor.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CXTranslationUnit.h"
+#include "CXCursor.h"
+#include "CXString.h"
+#include "clang/Frontend/ASTUnit.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/DeclTemplate.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/ExprCXX.h"
+#include "clang/AST/ExprObjC.h"
+#include "clang-c/Index.h"
+#include "llvm/Support/ErrorHandling.h"
+
+using namespace clang;
+using namespace cxcursor;
+
+CXCursor cxcursor::MakeCXCursorInvalid(CXCursorKind K) {
+  assert(K >= CXCursor_FirstInvalid && K <= CXCursor_LastInvalid);
+  CXCursor C = { K, 0, { 0, 0, 0 } };
+  return C;
+}
+
+static CXCursorKind GetCursorKind(const Attr *A) {
+  assert(A && "Invalid arguments!");
+  switch (A->getKind()) {
+    default: break;
+    case attr::IBAction: return CXCursor_IBActionAttr;
+    case attr::IBOutlet: return CXCursor_IBOutletAttr;
+    case attr::IBOutletCollection: return CXCursor_IBOutletCollectionAttr;
+    case attr::Final: return CXCursor_CXXFinalAttr;
+    case attr::Override: return CXCursor_CXXOverrideAttr;
+    case attr::Annotate: return CXCursor_AnnotateAttr;
+    case attr::AsmLabel: return CXCursor_AsmLabelAttr;
+  }
+
+  return CXCursor_UnexposedAttr;
+}
+
+CXCursor cxcursor::MakeCXCursor(const Attr *A, Decl *Parent,
+                                CXTranslationUnit TU) {
+  assert(A && Parent && TU && "Invalid arguments!");
+  CXCursor C = { GetCursorKind(A), 0, { Parent, (void*)A, TU } };
+  return C;
+}
+
+CXCursor cxcursor::MakeCXCursor(Decl *D, CXTranslationUnit TU,
+                                SourceRange RegionOfInterest,
+                                bool FirstInDeclGroup) {
+  assert(D && TU && "Invalid arguments!");
+
+  CXCursorKind K = getCursorKindForDecl(D);
+
+  if (K == CXCursor_ObjCClassMethodDecl ||
+      K == CXCursor_ObjCInstanceMethodDecl) {
+    int SelectorIdIndex = -1;
+    // Check if cursor points to a selector id.
+    if (RegionOfInterest.isValid() &&
+        RegionOfInterest.getBegin() == RegionOfInterest.getEnd()) {
+      SmallVector<SourceLocation, 16> SelLocs;
+      cast<ObjCMethodDecl>(D)->getSelectorLocs(SelLocs);
+      SmallVector<SourceLocation, 16>::iterator
+        I=std::find(SelLocs.begin(), SelLocs.end(),RegionOfInterest.getBegin());
+      if (I != SelLocs.end())
+        SelectorIdIndex = I - SelLocs.begin();
+    }
+    CXCursor C = { K, SelectorIdIndex,
+                   { D, (void*)(intptr_t) (FirstInDeclGroup ? 1 : 0), TU }};
+    return C;
+  }
+  
+  CXCursor C = { K, 0, { D, (void*)(intptr_t) (FirstInDeclGroup ? 1 : 0), TU }};
+  return C;
+}
+
+CXCursor cxcursor::MakeCXCursor(Stmt *S, Decl *Parent, CXTranslationUnit TU,
+                                SourceRange RegionOfInterest) {
+  assert(S && TU && "Invalid arguments!");
+  CXCursorKind K = CXCursor_NotImplemented;
+  
+  switch (S->getStmtClass()) {
+  case Stmt::NoStmtClass:
+    break;
+  
+  case Stmt::CaseStmtClass:
+    K = CXCursor_CaseStmt;
+    break;
+  
+  case Stmt::DefaultStmtClass:
+    K = CXCursor_DefaultStmt;
+    break;
+  
+  case Stmt::IfStmtClass:
+    K = CXCursor_IfStmt;
+    break;
+  
+  case Stmt::SwitchStmtClass:
+    K = CXCursor_SwitchStmt;
+    break;
+  
+  case Stmt::WhileStmtClass:
+    K = CXCursor_WhileStmt;
+    break;
+  
+  case Stmt::DoStmtClass:
+    K = CXCursor_DoStmt;
+    break;
+  
+  case Stmt::ForStmtClass:
+    K = CXCursor_ForStmt;
+    break;
+  
+  case Stmt::GotoStmtClass:
+    K = CXCursor_GotoStmt;
+    break;
+  
+  case Stmt::IndirectGotoStmtClass:
+    K = CXCursor_IndirectGotoStmt;
+    break;
+  
+  case Stmt::ContinueStmtClass:
+    K = CXCursor_ContinueStmt;
+    break;
+  
+  case Stmt::BreakStmtClass:
+    K = CXCursor_BreakStmt;
+    break;
+  
+  case Stmt::ReturnStmtClass:
+    K = CXCursor_ReturnStmt;
+    break;
+  
+  case Stmt::AsmStmtClass:
+    K = CXCursor_AsmStmt;
+    break;
+  
+  case Stmt::ObjCAtTryStmtClass:
+    K = CXCursor_ObjCAtTryStmt;
+    break;
+  
+  case Stmt::ObjCAtCatchStmtClass:
+    K = CXCursor_ObjCAtCatchStmt;
+    break;
+  
+  case Stmt::ObjCAtFinallyStmtClass:
+    K = CXCursor_ObjCAtFinallyStmt;
+    break;
+  
+  case Stmt::ObjCAtThrowStmtClass:
+    K = CXCursor_ObjCAtThrowStmt;
+    break;
+  
+  case Stmt::ObjCAtSynchronizedStmtClass:
+    K = CXCursor_ObjCAtSynchronizedStmt;
+    break;
+  
+  case Stmt::ObjCAutoreleasePoolStmtClass:
+    K = CXCursor_ObjCAutoreleasePoolStmt;
+    break;
+  
+  case Stmt::ObjCForCollectionStmtClass:
+    K = CXCursor_ObjCForCollectionStmt;
+    break;
+  
+  case Stmt::CXXCatchStmtClass:
+    K = CXCursor_CXXCatchStmt;
+    break;
+  
+  case Stmt::CXXTryStmtClass:
+    K = CXCursor_CXXTryStmt;
+    break;
+  
+  case Stmt::CXXForRangeStmtClass:
+    K = CXCursor_CXXForRangeStmt;
+    break;
+  
+  case Stmt::SEHTryStmtClass:
+    K = CXCursor_SEHTryStmt;
+    break;
+  
+  case Stmt::SEHExceptStmtClass:
+    K = CXCursor_SEHExceptStmt;
+    break;
+  
+  case Stmt::SEHFinallyStmtClass:
+    K = CXCursor_SEHFinallyStmt;
+    break;
+  
+  case Stmt::ArrayTypeTraitExprClass:
+  case Stmt::AsTypeExprClass:
+  case Stmt::AtomicExprClass:
+  case Stmt::BinaryConditionalOperatorClass:
+  case Stmt::BinaryTypeTraitExprClass:
+  case Stmt::TypeTraitExprClass:
+  case Stmt::CXXBindTemporaryExprClass:
+  case Stmt::CXXDefaultArgExprClass:
+  case Stmt::CXXScalarValueInitExprClass:
+  case Stmt::CXXUuidofExprClass:
+  case Stmt::ChooseExprClass:
+  case Stmt::DesignatedInitExprClass:
+  case Stmt::ExprWithCleanupsClass:
+  case Stmt::ExpressionTraitExprClass:
+  case Stmt::ExtVectorElementExprClass:
+  case Stmt::ImplicitCastExprClass:
+  case Stmt::ImplicitValueInitExprClass:
+  case Stmt::MaterializeTemporaryExprClass:
+  case Stmt::ObjCIndirectCopyRestoreExprClass:
+  case Stmt::OffsetOfExprClass:
+  case Stmt::ParenListExprClass:
+  case Stmt::PredefinedExprClass:
+  case Stmt::ShuffleVectorExprClass:
+  case Stmt::UnaryExprOrTypeTraitExprClass:
+  case Stmt::UnaryTypeTraitExprClass:
+  case Stmt::VAArgExprClass:
+  case Stmt::ObjCArrayLiteralClass:
+  case Stmt::ObjCDictionaryLiteralClass:
+  case Stmt::ObjCNumericLiteralClass:
+  case Stmt::ObjCSubscriptRefExprClass:
+    K = CXCursor_UnexposedExpr;
+    break;
+
+  case Stmt::OpaqueValueExprClass:
+    if (Expr *Src = cast<OpaqueValueExpr>(S)->getSourceExpr())
+      return MakeCXCursor(Src, Parent, TU, RegionOfInterest);
+    K = CXCursor_UnexposedExpr;
+    break;
+
+  case Stmt::PseudoObjectExprClass:
+    return MakeCXCursor(cast<PseudoObjectExpr>(S)->getSyntacticForm(),
+                        Parent, TU, RegionOfInterest);
+
+  case Stmt::CompoundStmtClass:
+    K = CXCursor_CompoundStmt;
+    break;
+
+  case Stmt::NullStmtClass:
+    K = CXCursor_NullStmt;
+    break;
+
+  case Stmt::LabelStmtClass:
+    K = CXCursor_LabelStmt;
+    break;
+
+  case Stmt::AttributedStmtClass:
+    K = CXCursor_UnexposedStmt;
+    break;
+
+  case Stmt::DeclStmtClass:
+    K = CXCursor_DeclStmt;
+    break;
+
+  case Stmt::IntegerLiteralClass:
+    K = CXCursor_IntegerLiteral;
+    break;
+
+  case Stmt::FloatingLiteralClass:
+    K = CXCursor_FloatingLiteral;
+    break;
+
+  case Stmt::ImaginaryLiteralClass:
+    K = CXCursor_ImaginaryLiteral;
+    break;
+
+  case Stmt::StringLiteralClass:
+    K = CXCursor_StringLiteral;
+    break;
+
+  case Stmt::CharacterLiteralClass:
+    K = CXCursor_CharacterLiteral;
+    break;
+
+  case Stmt::ParenExprClass:
+    K = CXCursor_ParenExpr;
+    break;
+
+  case Stmt::UnaryOperatorClass:
+    K = CXCursor_UnaryOperator;
+    break;
+
+  case Stmt::CXXNoexceptExprClass:
+    K = CXCursor_UnaryExpr;
+    break;
+
+  case Stmt::ArraySubscriptExprClass:
+    K = CXCursor_ArraySubscriptExpr;
+    break;
+
+  case Stmt::BinaryOperatorClass:
+    K = CXCursor_BinaryOperator;
+    break;
+
+  case Stmt::CompoundAssignOperatorClass:
+    K = CXCursor_CompoundAssignOperator;
+    break;
+
+  case Stmt::ConditionalOperatorClass:
+    K = CXCursor_ConditionalOperator;
+    break;
+
+  case Stmt::CStyleCastExprClass:
+    K = CXCursor_CStyleCastExpr;
+    break;
+
+  case Stmt::CompoundLiteralExprClass:
+    K = CXCursor_CompoundLiteralExpr;
+    break;
+
+  case Stmt::InitListExprClass:
+    K = CXCursor_InitListExpr;
+    break;
+
+  case Stmt::AddrLabelExprClass:
+    K = CXCursor_AddrLabelExpr;
+    break;
+
+  case Stmt::StmtExprClass:
+    K = CXCursor_StmtExpr;
+    break;
+
+  case Stmt::GenericSelectionExprClass:
+    K = CXCursor_GenericSelectionExpr;
+    break;
+
+  case Stmt::GNUNullExprClass:
+    K = CXCursor_GNUNullExpr;
+    break;
+
+  case Stmt::CXXStaticCastExprClass:
+    K = CXCursor_CXXStaticCastExpr;
+    break;
+
+  case Stmt::CXXDynamicCastExprClass:
+    K = CXCursor_CXXDynamicCastExpr;
+    break;
+
+  case Stmt::CXXReinterpretCastExprClass:
+    K = CXCursor_CXXReinterpretCastExpr;
+    break;
+
+  case Stmt::CXXConstCastExprClass:
+    K = CXCursor_CXXConstCastExpr;
+    break;
+
+  case Stmt::CXXFunctionalCastExprClass:
+    K = CXCursor_CXXFunctionalCastExpr;
+    break;
+
+  case Stmt::CXXTypeidExprClass:
+    K = CXCursor_CXXTypeidExpr;
+    break;
+
+  case Stmt::CXXBoolLiteralExprClass:
+    K = CXCursor_CXXBoolLiteralExpr;
+    break;
+
+  case Stmt::CXXNullPtrLiteralExprClass:
+    K = CXCursor_CXXNullPtrLiteralExpr;
+    break;
+
+  case Stmt::CXXThisExprClass:
+    K = CXCursor_CXXThisExpr;
+    break;
+
+  case Stmt::CXXThrowExprClass:
+    K = CXCursor_CXXThrowExpr;
+    break;
+
+  case Stmt::CXXNewExprClass:
+    K = CXCursor_CXXNewExpr;
+    break;
+
+  case Stmt::CXXDeleteExprClass:
+    K = CXCursor_CXXDeleteExpr;
+    break;
+
+  case Stmt::ObjCStringLiteralClass:
+    K = CXCursor_ObjCStringLiteral;
+    break;
+
+  case Stmt::ObjCEncodeExprClass:
+    K = CXCursor_ObjCEncodeExpr;
+    break;
+
+  case Stmt::ObjCSelectorExprClass:
+    K = CXCursor_ObjCSelectorExpr;
+    break;
+
+  case Stmt::ObjCProtocolExprClass:
+    K = CXCursor_ObjCProtocolExpr;
+    break;
+      
+  case Stmt::ObjCBoolLiteralExprClass:
+    K = CXCursor_ObjCBoolLiteralExpr;
+    break;
+      
+  case Stmt::ObjCBridgedCastExprClass:
+    K = CXCursor_ObjCBridgedCastExpr;
+    break;
+
+  case Stmt::BlockExprClass:
+    K = CXCursor_BlockExpr;
+    break;
+
+  case Stmt::PackExpansionExprClass:
+    K = CXCursor_PackExpansionExpr;
+    break;
+
+  case Stmt::SizeOfPackExprClass:
+    K = CXCursor_SizeOfPackExpr;
+    break;
+
+  case Stmt::DeclRefExprClass:           
+  case Stmt::DependentScopeDeclRefExprClass:
+  case Stmt::SubstNonTypeTemplateParmExprClass:
+  case Stmt::SubstNonTypeTemplateParmPackExprClass:
+  case Stmt::UnresolvedLookupExprClass:
+    K = CXCursor_DeclRefExpr;
+    break;
+      
+  case Stmt::CXXDependentScopeMemberExprClass:
+  case Stmt::CXXPseudoDestructorExprClass:
+  case Stmt::MemberExprClass:            
+  case Stmt::ObjCIsaExprClass:
+  case Stmt::ObjCIvarRefExprClass:    
+  case Stmt::ObjCPropertyRefExprClass: 
+  case Stmt::UnresolvedMemberExprClass:
+    K = CXCursor_MemberRefExpr;
+    break;
+      
+  case Stmt::CallExprClass:              
+  case Stmt::CXXOperatorCallExprClass:
+  case Stmt::CXXMemberCallExprClass:
+  case Stmt::CUDAKernelCallExprClass:
+  case Stmt::CXXConstructExprClass:  
+  case Stmt::CXXTemporaryObjectExprClass:
+  case Stmt::CXXUnresolvedConstructExprClass:
+  case Stmt::UserDefinedLiteralClass:
+    K = CXCursor_CallExpr;
+    break;
+      
+  case Stmt::LambdaExprClass:
+    K = CXCursor_LambdaExpr;
+    break;
+      
+  case Stmt::ObjCMessageExprClass: {
+    K = CXCursor_ObjCMessageExpr;
+    int SelectorIdIndex = -1;
+    // Check if cursor points to a selector id.
+    if (RegionOfInterest.isValid() &&
+        RegionOfInterest.getBegin() == RegionOfInterest.getEnd()) {
+      SmallVector<SourceLocation, 16> SelLocs;
+      cast<ObjCMessageExpr>(S)->getSelectorLocs(SelLocs);
+      SmallVector<SourceLocation, 16>::iterator
+        I=std::find(SelLocs.begin(), SelLocs.end(),RegionOfInterest.getBegin());
+      if (I != SelLocs.end())
+        SelectorIdIndex = I - SelLocs.begin();
+    }
+    CXCursor C = { K, 0, { Parent, S, TU } };
+    return getSelectorIdentifierCursor(SelectorIdIndex, C);
+  }
+      
+  case Stmt::MSDependentExistsStmtClass:
+    K = CXCursor_UnexposedStmt;
+    break;
+  }
+  
+  CXCursor C = { K, 0, { Parent, S, TU } };
+  return C;
+}
+
+CXCursor cxcursor::MakeCursorObjCSuperClassRef(ObjCInterfaceDecl *Super, 
+                                               SourceLocation Loc, 
+                                               CXTranslationUnit TU) {
+  assert(Super && TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  CXCursor C = { CXCursor_ObjCSuperClassRef, 0, { Super, RawLoc, TU } };
+  return C;    
+}
+
+std::pair<ObjCInterfaceDecl *, SourceLocation> 
+cxcursor::getCursorObjCSuperClassRef(CXCursor C) {
+  assert(C.kind == CXCursor_ObjCSuperClassRef);
+  return std::make_pair(static_cast<ObjCInterfaceDecl *>(C.data[0]),
+           SourceLocation::getFromRawEncoding(
+                                      reinterpret_cast<uintptr_t>(C.data[1])));
+}
+
+CXCursor cxcursor::MakeCursorObjCProtocolRef(const ObjCProtocolDecl *Proto, 
+                                             SourceLocation Loc, 
+                                             CXTranslationUnit TU) {
+  assert(Proto && TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  CXCursor C = { CXCursor_ObjCProtocolRef, 0, { (void*)Proto, RawLoc, TU } };
+  return C;    
+}
+
+std::pair<ObjCProtocolDecl *, SourceLocation> 
+cxcursor::getCursorObjCProtocolRef(CXCursor C) {
+  assert(C.kind == CXCursor_ObjCProtocolRef);
+  return std::make_pair(static_cast<ObjCProtocolDecl *>(C.data[0]),
+           SourceLocation::getFromRawEncoding(
+                                      reinterpret_cast<uintptr_t>(C.data[1])));
+}
+
+CXCursor cxcursor::MakeCursorObjCClassRef(const ObjCInterfaceDecl *Class, 
+                                          SourceLocation Loc, 
+                                          CXTranslationUnit TU) {
+  // 'Class' can be null for invalid code.
+  if (!Class)
+    return MakeCXCursorInvalid(CXCursor_InvalidCode);
+  assert(TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  CXCursor C = { CXCursor_ObjCClassRef, 0, { (void*)Class, RawLoc, TU } };
+  return C;    
+}
+
+std::pair<ObjCInterfaceDecl *, SourceLocation> 
+cxcursor::getCursorObjCClassRef(CXCursor C) {
+  assert(C.kind == CXCursor_ObjCClassRef);
+  return std::make_pair(static_cast<ObjCInterfaceDecl *>(C.data[0]),
+           SourceLocation::getFromRawEncoding(
+                                      reinterpret_cast<uintptr_t>(C.data[1])));
+}
+
+CXCursor cxcursor::MakeCursorTypeRef(const TypeDecl *Type, SourceLocation Loc, 
+                                     CXTranslationUnit TU) {
+  assert(Type && TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  CXCursor C = { CXCursor_TypeRef, 0, { (void*)Type, RawLoc, TU } };
+  return C;    
+}
+
+std::pair<TypeDecl *, SourceLocation> 
+cxcursor::getCursorTypeRef(CXCursor C) {
+  assert(C.kind == CXCursor_TypeRef);
+  return std::make_pair(static_cast<TypeDecl *>(C.data[0]),
+           SourceLocation::getFromRawEncoding(
+                                      reinterpret_cast<uintptr_t>(C.data[1])));
+}
+
+CXCursor cxcursor::MakeCursorTemplateRef(const TemplateDecl *Template, 
+                                         SourceLocation Loc,
+                                         CXTranslationUnit TU) {
+  assert(Template && TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  CXCursor C = { CXCursor_TemplateRef, 0, { (void*)Template, RawLoc, TU } };
+  return C;    
+}
+
+std::pair<TemplateDecl *, SourceLocation> 
+cxcursor::getCursorTemplateRef(CXCursor C) {
+  assert(C.kind == CXCursor_TemplateRef);
+  return std::make_pair(static_cast<TemplateDecl *>(C.data[0]),
+                        SourceLocation::getFromRawEncoding(
+                                       reinterpret_cast<uintptr_t>(C.data[1])));  
+}
+
+CXCursor cxcursor::MakeCursorNamespaceRef(const NamedDecl *NS,
+                                          SourceLocation Loc, 
+                                          CXTranslationUnit TU) {
+  
+  assert(NS && (isa<NamespaceDecl>(NS) || isa<NamespaceAliasDecl>(NS)) && TU &&
+         "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  CXCursor C = { CXCursor_NamespaceRef, 0, { (void*)NS, RawLoc, TU } };
+  return C;    
+}
+
+std::pair<NamedDecl *, SourceLocation> 
+cxcursor::getCursorNamespaceRef(CXCursor C) {
+  assert(C.kind == CXCursor_NamespaceRef);
+  return std::make_pair(static_cast<NamedDecl *>(C.data[0]),
+                        SourceLocation::getFromRawEncoding(
+                                       reinterpret_cast<uintptr_t>(C.data[1])));  
+}
+
+CXCursor cxcursor::MakeCursorVariableRef(const VarDecl *Var, SourceLocation Loc, 
+                                         CXTranslationUnit TU) {
+  
+  assert(Var && TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  CXCursor C = { CXCursor_VariableRef, 0, { (void*)Var, RawLoc, TU } };
+  return C;
+}
+
+std::pair<VarDecl *, SourceLocation> 
+cxcursor::getCursorVariableRef(CXCursor C) {
+  assert(C.kind == CXCursor_VariableRef);
+  return std::make_pair(static_cast<VarDecl *>(C.data[0]),
+                        SourceLocation::getFromRawEncoding(
+                          reinterpret_cast<uintptr_t>(C.data[1])));
+}
+
+CXCursor cxcursor::MakeCursorMemberRef(const FieldDecl *Field, SourceLocation Loc, 
+                                       CXTranslationUnit TU) {
+  
+  assert(Field && TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  CXCursor C = { CXCursor_MemberRef, 0, { (void*)Field, RawLoc, TU } };
+  return C;    
+}
+
+std::pair<FieldDecl *, SourceLocation> 
+cxcursor::getCursorMemberRef(CXCursor C) {
+  assert(C.kind == CXCursor_MemberRef);
+  return std::make_pair(static_cast<FieldDecl *>(C.data[0]),
+                        SourceLocation::getFromRawEncoding(
+                                       reinterpret_cast<uintptr_t>(C.data[1])));  
+}
+
+CXCursor cxcursor::MakeCursorCXXBaseSpecifier(const CXXBaseSpecifier *B,
+                                              CXTranslationUnit TU){
+  CXCursor C = { CXCursor_CXXBaseSpecifier, 0, { (void*)B, 0, TU } };
+  return C;  
+}
+
+CXXBaseSpecifier *cxcursor::getCursorCXXBaseSpecifier(CXCursor C) {
+  assert(C.kind == CXCursor_CXXBaseSpecifier);
+  return static_cast<CXXBaseSpecifier*>(C.data[0]);
+}
+
+CXCursor cxcursor::MakePreprocessingDirectiveCursor(SourceRange Range, 
+                                                    CXTranslationUnit TU) {
+  CXCursor C = { CXCursor_PreprocessingDirective, 0,
+                 { reinterpret_cast<void *>(Range.getBegin().getRawEncoding()),
+                   reinterpret_cast<void *>(Range.getEnd().getRawEncoding()),
+                   TU }
+               };
+  return C;
+}
+
+SourceRange cxcursor::getCursorPreprocessingDirective(CXCursor C) {
+  assert(C.kind == CXCursor_PreprocessingDirective);
+  SourceRange Range = SourceRange(SourceLocation::getFromRawEncoding(
+                                      reinterpret_cast<uintptr_t> (C.data[0])),
+                     SourceLocation::getFromRawEncoding(
+                                      reinterpret_cast<uintptr_t> (C.data[1])));
+  ASTUnit *TU = getCursorASTUnit(C);
+  return TU->mapRangeFromPreamble(Range);
+}
+
+CXCursor cxcursor::MakeMacroDefinitionCursor(MacroDefinition *MI,
+                                             CXTranslationUnit TU) {
+  CXCursor C = { CXCursor_MacroDefinition, 0, { MI, 0, TU } };
+  return C;
+}
+
+MacroDefinition *cxcursor::getCursorMacroDefinition(CXCursor C) {
+  assert(C.kind == CXCursor_MacroDefinition);
+  return static_cast<MacroDefinition *>(C.data[0]);
+}
+
+CXCursor cxcursor::MakeMacroExpansionCursor(MacroExpansion *MI, 
+                                            CXTranslationUnit TU) {
+  CXCursor C = { CXCursor_MacroExpansion, 0, { MI, 0, TU } };
+  return C;
+}
+
+MacroExpansion *cxcursor::getCursorMacroExpansion(CXCursor C) {
+  assert(C.kind == CXCursor_MacroExpansion);
+  return static_cast<MacroExpansion *>(C.data[0]);
+}
+
+CXCursor cxcursor::MakeInclusionDirectiveCursor(InclusionDirective *ID, 
+                                                CXTranslationUnit TU) {
+  CXCursor C = { CXCursor_InclusionDirective, 0, { ID, 0, TU } };
+  return C;
+}
+
+InclusionDirective *cxcursor::getCursorInclusionDirective(CXCursor C) {
+  assert(C.kind == CXCursor_InclusionDirective);
+  return static_cast<InclusionDirective *>(C.data[0]);  
+}
+
+CXCursor cxcursor::MakeCursorLabelRef(LabelStmt *Label, SourceLocation Loc, 
+                                      CXTranslationUnit TU) {
+  
+  assert(Label && TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  CXCursor C = { CXCursor_LabelRef, 0, { Label, RawLoc, TU } };
+  return C;    
+}
+
+std::pair<LabelStmt*, SourceLocation> 
+cxcursor::getCursorLabelRef(CXCursor C) {
+  assert(C.kind == CXCursor_LabelRef);
+  return std::make_pair(static_cast<LabelStmt *>(C.data[0]),
+                        SourceLocation::getFromRawEncoding(
+                                       reinterpret_cast<uintptr_t>(C.data[1])));  
+}
+
+CXCursor cxcursor::MakeCursorOverloadedDeclRef(OverloadExpr *E, 
+                                               CXTranslationUnit TU) {
+  assert(E && TU && "Invalid arguments!");
+  OverloadedDeclRefStorage Storage(E);
+  void *RawLoc = reinterpret_cast<void *>(E->getNameLoc().getRawEncoding());
+  CXCursor C = { 
+                 CXCursor_OverloadedDeclRef, 0,
+                 { Storage.getOpaqueValue(), RawLoc, TU } 
+               };
+  return C;    
+}
+
+CXCursor cxcursor::MakeCursorOverloadedDeclRef(Decl *D, 
+                                               SourceLocation Loc,
+                                               CXTranslationUnit TU) {
+  assert(D && TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  OverloadedDeclRefStorage Storage(D);
+  CXCursor C = { 
+    CXCursor_OverloadedDeclRef, 0,
+    { Storage.getOpaqueValue(), RawLoc, TU }
+  };
+  return C;    
+}
+
+CXCursor cxcursor::MakeCursorOverloadedDeclRef(TemplateName Name, 
+                                               SourceLocation Loc,
+                                               CXTranslationUnit TU) {
+  assert(Name.getAsOverloadedTemplate() && TU && "Invalid arguments!");
+  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
+  OverloadedDeclRefStorage Storage(Name.getAsOverloadedTemplate());
+  CXCursor C = { 
+    CXCursor_OverloadedDeclRef, 0,
+    { Storage.getOpaqueValue(), RawLoc, TU } 
+  };
+  return C;    
+}
+
+std::pair<cxcursor::OverloadedDeclRefStorage, SourceLocation>
+cxcursor::getCursorOverloadedDeclRef(CXCursor C) {
+  assert(C.kind == CXCursor_OverloadedDeclRef);
+  return std::make_pair(OverloadedDeclRefStorage::getFromOpaqueValue(C.data[0]),
+                        SourceLocation::getFromRawEncoding(
+                                       reinterpret_cast<uintptr_t>(C.data[1])));
+}
+
+Decl *cxcursor::getCursorDecl(CXCursor Cursor) {
+  return (Decl *)Cursor.data[0];
+}
+
+Expr *cxcursor::getCursorExpr(CXCursor Cursor) {
+  return dyn_cast_or_null<Expr>(getCursorStmt(Cursor));
+}
+
+Stmt *cxcursor::getCursorStmt(CXCursor Cursor) {
+  if (Cursor.kind == CXCursor_ObjCSuperClassRef ||
+      Cursor.kind == CXCursor_ObjCProtocolRef ||
+      Cursor.kind == CXCursor_ObjCClassRef)
+    return 0;
+
+  return (Stmt *)Cursor.data[1];
+}
+
+Attr *cxcursor::getCursorAttr(CXCursor Cursor) {
+  return (Attr *)Cursor.data[1];
+}
+
+Decl *cxcursor::getCursorParentDecl(CXCursor Cursor) {
+  return (Decl *)Cursor.data[0];
+}
+
+ASTContext &cxcursor::getCursorContext(CXCursor Cursor) {
+  return getCursorASTUnit(Cursor)->getASTContext();
+}
+
+ASTUnit *cxcursor::getCursorASTUnit(CXCursor Cursor) {
+  CXTranslationUnit TU = static_cast<CXTranslationUnit>(Cursor.data[2]);
+  if (!TU)
+    return 0;
+  return static_cast<ASTUnit *>(TU->TUData);
+}
+
+CXTranslationUnit cxcursor::getCursorTU(CXCursor Cursor) {
+  return static_cast<CXTranslationUnit>(Cursor.data[2]);
+}
+
+static void CollectOverriddenMethodsRecurse(CXTranslationUnit TU,
+                                     ObjCContainerDecl *Container, 
+                                     ObjCMethodDecl *Method,
+                                     SmallVectorImpl<CXCursor> &Methods,
+                                     bool MovedToSuper) {
+  if (!Container)
+    return;
+
+  // In categories look for overriden methods from protocols. A method from
+  // category is not "overriden" since it is considered as the "same" method
+  // (same USR) as the one from the interface.
+  if (ObjCCategoryDecl *Category = dyn_cast<ObjCCategoryDecl>(Container)) {
+    // Check whether we have a matching method at this category but only if we
+    // are at the super class level.
+    if (MovedToSuper)
+      if (ObjCMethodDecl *
+            Overridden = Container->getMethod(Method->getSelector(),
+                                              Method->isInstanceMethod()))
+        if (Method != Overridden) {
+          // We found an override at this category; there is no need to look
+          // into its protocols.
+          Methods.push_back(MakeCXCursor(Overridden, TU));
+          return;
+        }
+
+    for (ObjCCategoryDecl::protocol_iterator P = Category->protocol_begin(),
+                                          PEnd = Category->protocol_end();
+         P != PEnd; ++P)
+      CollectOverriddenMethodsRecurse(TU, *P, Method, Methods, MovedToSuper);
+    return;
+  }
+
+  // Check whether we have a matching method at this level.
+  if (ObjCMethodDecl *Overridden = Container->getMethod(Method->getSelector(),
+                                                    Method->isInstanceMethod()))
+    if (Method != Overridden) {
+      // We found an override at this level; there is no need to look
+      // into other protocols or categories.
+      Methods.push_back(MakeCXCursor(Overridden, TU));
+      return;
+    }
+
+  if (ObjCProtocolDecl *Protocol = dyn_cast<ObjCProtocolDecl>(Container)) {
+    for (ObjCProtocolDecl::protocol_iterator P = Protocol->protocol_begin(),
+                                          PEnd = Protocol->protocol_end();
+         P != PEnd; ++P)
+      CollectOverriddenMethodsRecurse(TU, *P, Method, Methods, MovedToSuper);
+  }
+
+  if (ObjCInterfaceDecl *Interface = dyn_cast<ObjCInterfaceDecl>(Container)) {
+    for (ObjCInterfaceDecl::protocol_iterator P = Interface->protocol_begin(),
+                                           PEnd = Interface->protocol_end();
+         P != PEnd; ++P)
+      CollectOverriddenMethodsRecurse(TU, *P, Method, Methods, MovedToSuper);
+
+    for (ObjCCategoryDecl *Category = Interface->getCategoryList();
+         Category; Category = Category->getNextClassCategory())
+      CollectOverriddenMethodsRecurse(TU, Category, Method, Methods,
+                                      MovedToSuper);
+
+    if (ObjCInterfaceDecl *Super = Interface->getSuperClass())
+      return CollectOverriddenMethodsRecurse(TU, Super, Method, Methods,
+                                             /*MovedToSuper=*/true);
+  }
+}
+
+static inline void CollectOverriddenMethods(CXTranslationUnit TU,
+                                           ObjCContainerDecl *Container, 
+                                           ObjCMethodDecl *Method,
+                                           SmallVectorImpl<CXCursor> &Methods) {
+  CollectOverriddenMethodsRecurse(TU, Container, Method, Methods,
+                                  /*MovedToSuper=*/false);
+}
+
+void cxcursor::getOverriddenCursors(CXCursor cursor,
+                                    SmallVectorImpl<CXCursor> &overridden) { 
+  assert(clang_isDeclaration(cursor.kind));
+  Decl *D = getCursorDecl(cursor);
+  if (!D)
+    return;
+
+  // Handle C++ member functions.
+  CXTranslationUnit TU = getCursorTU(cursor);
+  if (CXXMethodDecl *CXXMethod = dyn_cast<CXXMethodDecl>(D)) {
+    for (CXXMethodDecl::method_iterator
+              M = CXXMethod->begin_overridden_methods(),
+           MEnd = CXXMethod->end_overridden_methods();
+         M != MEnd; ++M)
+      overridden.push_back(MakeCXCursor(const_cast<CXXMethodDecl*>(*M), TU));
+    return;
+  }
+
+  ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D);
+  if (!Method)
+    return;
+
+  if (ObjCProtocolDecl *
+        ProtD = dyn_cast<ObjCProtocolDecl>(Method->getDeclContext())) {
+    CollectOverriddenMethods(TU, ProtD, Method, overridden);
+
+  } else if (ObjCImplDecl *
+               IMD = dyn_cast<ObjCImplDecl>(Method->getDeclContext())) {
+    ObjCInterfaceDecl *ID = IMD->getClassInterface();
+    if (!ID)
+      return;
+    // Start searching for overridden methods using the method from the
+    // interface as starting point.
+    if (ObjCMethodDecl *IFaceMeth = ID->getMethod(Method->getSelector(),
+                                                  Method->isInstanceMethod()))
+      Method = IFaceMeth;
+    CollectOverriddenMethods(TU, ID, Method, overridden);
+
+  } else if (ObjCCategoryDecl *
+               CatD = dyn_cast<ObjCCategoryDecl>(Method->getDeclContext())) {
+    ObjCInterfaceDecl *ID = CatD->getClassInterface();
+    if (!ID)
+      return;
+    // Start searching for overridden methods using the method from the
+    // interface as starting point.
+    if (ObjCMethodDecl *IFaceMeth = ID->getMethod(Method->getSelector(),
+                                                  Method->isInstanceMethod()))
+      Method = IFaceMeth;
+    CollectOverriddenMethods(TU, ID, Method, overridden);
+
+  } else {
+    CollectOverriddenMethods(TU,
+                  dyn_cast_or_null<ObjCContainerDecl>(Method->getDeclContext()),
+                  Method, overridden);
+  }
+}
+
+std::pair<int, SourceLocation>
+cxcursor::getSelectorIdentifierIndexAndLoc(CXCursor cursor) {
+  if (cursor.kind == CXCursor_ObjCMessageExpr) {
+    if (cursor.xdata != -1)
+      return std::make_pair(cursor.xdata,
+                            cast<ObjCMessageExpr>(getCursorExpr(cursor))
+                                                ->getSelectorLoc(cursor.xdata));
+  } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
+             cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
+    if (cursor.xdata != -1)
+      return std::make_pair(cursor.xdata,
+                            cast<ObjCMethodDecl>(getCursorDecl(cursor))
+                                                ->getSelectorLoc(cursor.xdata));
+  }
+
+  return std::make_pair(-1, SourceLocation());
+}
+
+CXCursor cxcursor::getSelectorIdentifierCursor(int SelIdx, CXCursor cursor) {
+  CXCursor newCursor = cursor;
+
+  if (cursor.kind == CXCursor_ObjCMessageExpr) {
+    if (SelIdx == -1 ||
+        unsigned(SelIdx) >= cast<ObjCMessageExpr>(getCursorExpr(cursor))
+                                                         ->getNumSelectorLocs())
+      newCursor.xdata = -1;
+    else
+      newCursor.xdata = SelIdx;
+  } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
+             cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
+    if (SelIdx == -1 ||
+        unsigned(SelIdx) >= cast<ObjCMethodDecl>(getCursorDecl(cursor))
+                                                         ->getNumSelectorLocs())
+      newCursor.xdata = -1;
+    else
+      newCursor.xdata = SelIdx;
+  }
+
+  return newCursor;
+}
+
+CXCursor cxcursor::getTypeRefCursor(CXCursor cursor) {
+  if (cursor.kind != CXCursor_CallExpr)
+    return cursor;
+
+  if (cursor.xdata == 0)
+    return cursor;
+
+  Expr *E = getCursorExpr(cursor);
+  TypeSourceInfo *Type = 0;
+  if (CXXUnresolvedConstructExpr *
+        UnCtor = dyn_cast<CXXUnresolvedConstructExpr>(E)) {
+    Type = UnCtor->getTypeSourceInfo();
+  } else if (CXXTemporaryObjectExpr *Tmp = dyn_cast<CXXTemporaryObjectExpr>(E)){
+    Type = Tmp->getTypeSourceInfo();
+  }
+
+  if (!Type)
+    return cursor;
+
+  CXTranslationUnit TU = getCursorTU(cursor);
+  QualType Ty = Type->getType();
+  TypeLoc TL = Type->getTypeLoc();
+  SourceLocation Loc = TL.getBeginLoc();
+
+  if (const ElaboratedType *ElabT = Ty->getAs<ElaboratedType>()) {
+    Ty = ElabT->getNamedType();
+    ElaboratedTypeLoc ElabTL = cast<ElaboratedTypeLoc>(TL);
+    Loc = ElabTL.getNamedTypeLoc().getBeginLoc();
+  }
+
+  if (const TypedefType *Typedef = Ty->getAs<TypedefType>())
+    return MakeCursorTypeRef(Typedef->getDecl(), Loc, TU);
+  if (const TagType *Tag = Ty->getAs<TagType>())
+    return MakeCursorTypeRef(Tag->getDecl(), Loc, TU);
+  if (const TemplateTypeParmType *TemplP = Ty->getAs<TemplateTypeParmType>())
+    return MakeCursorTypeRef(TemplP->getDecl(), Loc, TU);
+
+  return cursor;
+}
+
+bool cxcursor::operator==(CXCursor X, CXCursor Y) {
+  return X.kind == Y.kind && X.data[0] == Y.data[0] && X.data[1] == Y.data[1] &&
+         X.data[2] == Y.data[2];
+}
+
+// FIXME: Remove once we can model DeclGroups and their appropriate ranges
+// properly in the ASTs.
+bool cxcursor::isFirstInDeclGroup(CXCursor C) {
+  assert(clang_isDeclaration(C.kind));
+  return ((uintptr_t) (C.data[1])) != 0;
+}
+
+//===----------------------------------------------------------------------===//
+// libclang CXCursor APIs
+//===----------------------------------------------------------------------===//
+
+extern "C" {
+
+int clang_Cursor_isNull(CXCursor cursor) {
+  return clang_equalCursors(cursor, clang_getNullCursor());
+}
+
+CXTranslationUnit clang_Cursor_getTranslationUnit(CXCursor cursor) {
+  return getCursorTU(cursor);
+}
+
+int clang_Cursor_getNumArguments(CXCursor C) {
+  if (clang_isDeclaration(C.kind)) {
+    Decl *D = cxcursor::getCursorDecl(C);
+    if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D))
+      return MD->param_size();
+    if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D))
+      return FD->param_size();
+  }
+
+  return -1;
+}
+
+CXCursor clang_Cursor_getArgument(CXCursor C, unsigned i) {
+  if (clang_isDeclaration(C.kind)) {
+    Decl *D = cxcursor::getCursorDecl(C);
+    if (ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D)) {
+      if (i < MD->param_size())
+        return cxcursor::MakeCXCursor(MD->param_begin()[i],
+                                      cxcursor::getCursorTU(C));
+    } else if (FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) {
+      if (i < FD->param_size())
+        return cxcursor::MakeCXCursor(FD->param_begin()[i],
+                                      cxcursor::getCursorTU(C));
+    }
+  }
+
+  return clang_getNullCursor();
+}
+
+} // end: extern "C"
+
+//===----------------------------------------------------------------------===//
+// CXCursorSet.
+//===----------------------------------------------------------------------===//
+
+typedef llvm::DenseMap<CXCursor, unsigned> CXCursorSet_Impl;
+
+static inline CXCursorSet packCXCursorSet(CXCursorSet_Impl *setImpl) {
+  return (CXCursorSet) setImpl;
+}
+static inline CXCursorSet_Impl *unpackCXCursorSet(CXCursorSet set) {
+  return (CXCursorSet_Impl*) set;
+}
+namespace llvm {
+template<> struct DenseMapInfo<CXCursor> {
+public:
+  static inline CXCursor getEmptyKey() {
+    return MakeCXCursorInvalid(CXCursor_InvalidFile);
+  }
+  static inline CXCursor getTombstoneKey() {
+    return MakeCXCursorInvalid(CXCursor_NoDeclFound);
+  }
+  static inline unsigned getHashValue(const CXCursor &cursor) {
+    return llvm::DenseMapInfo<std::pair<void*,void*> >
+      ::getHashValue(std::make_pair(cursor.data[0], cursor.data[1]));
+  }
+  static inline bool isEqual(const CXCursor &x, const CXCursor &y) {
+    return x.kind == y.kind &&
+           x.data[0] == y.data[0] &&
+           x.data[1] == y.data[1];
+  }
+};
+}
+
+extern "C" {
+CXCursorSet clang_createCXCursorSet() {
+  return packCXCursorSet(new CXCursorSet_Impl());
+}
+
+void clang_disposeCXCursorSet(CXCursorSet set) {
+  delete unpackCXCursorSet(set);
+}
+
+unsigned clang_CXCursorSet_contains(CXCursorSet set, CXCursor cursor) {
+  CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
+  if (!setImpl)
+    return 0;
+  return setImpl->find(cursor) == setImpl->end();
+}
+
+unsigned clang_CXCursorSet_insert(CXCursorSet set, CXCursor cursor) {
+  // Do not insert invalid cursors into the set.
+  if (cursor.kind >= CXCursor_FirstInvalid &&
+      cursor.kind <= CXCursor_LastInvalid)
+    return 1;
+
+  CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
+  if (!setImpl)
+    return 1;
+  unsigned &entry = (*setImpl)[cursor];
+  unsigned flag = entry == 0 ? 1 : 0;
+  entry = 1;
+  return flag;
+}
+  
+CXCompletionString clang_getCursorCompletionString(CXCursor cursor) {
+  enum CXCursorKind kind = clang_getCursorKind(cursor);
+  if (clang_isDeclaration(kind)) {
+    Decl *decl = getCursorDecl(cursor);
+    if (NamedDecl *namedDecl = dyn_cast_or_null<NamedDecl>(decl)) {
+      ASTUnit *unit = getCursorASTUnit(cursor);
+      CodeCompletionResult Result(namedDecl);
+      CodeCompletionString *String
+        = Result.CreateCodeCompletionString(unit->getASTContext(),
+                                            unit->getPreprocessor(),
+                                 unit->getCodeCompletionTUInfo().getAllocator(),
+                                 unit->getCodeCompletionTUInfo());
+      return String;
+    }
+  }
+  else if (kind == CXCursor_MacroDefinition) {
+    MacroDefinition *definition = getCursorMacroDefinition(cursor);
+    const IdentifierInfo *MacroInfo = definition->getName();
+    ASTUnit *unit = getCursorASTUnit(cursor);
+    CodeCompletionResult Result(const_cast<IdentifierInfo *>(MacroInfo));
+    CodeCompletionString *String
+      = Result.CreateCodeCompletionString(unit->getASTContext(),
+                                          unit->getPreprocessor(),
+                                 unit->getCodeCompletionTUInfo().getAllocator(),
+                                 unit->getCodeCompletionTUInfo());
+    return String;
+  }
+  return NULL;
+}
+  
+} // end: extern "C"