[libclang] Introduce clang_Cursor_isNull and clang_Cursor_getTranslationUnit functions.

llvm-svn: 140587

clang/include/clang-c/Index.h

@@ -1554,6 +1554,13 @@ CINDEX_LINKAGE CXCursor clang_getTranslationUnitCursor(CXTranslationUnit);
  */
 CINDEX_LINKAGE unsigned clang_equalCursors(CXCursor, CXCursor);
 
+/**
+ * \brief Returns non-zero if \arg cursor is null.
+ */
+static inline int clang_Cursor_isNull(CXCursor cursor) {
+  return clang_equalCursors(cursor, clang_getNullCursor());
+}
+
 /**
  * \brief Compute a hash value for the given cursor.
  */
@@ -1669,6 +1676,11 @@ CINDEX_LINKAGE enum CXLanguageKind {
  */
 CINDEX_LINKAGE enum CXLanguageKind clang_getCursorLanguage(CXCursor cursor);
 
+/**
+ * \brief Returns the translation unit that a cursor originated from.
+ */
+CINDEX_LINKAGE CXTranslationUnit clang_Cursor_getTranslationUnit(CXCursor);
+
 
 /**
  * \brief A fast container representing a set of CXCursors.

clang/tools/libclang/CXCursor.cpp

@@ -518,6 +518,14 @@ bool cxcursor::isFirstInDeclGroup(CXCursor C) {
   return ((uintptr_t) (C.data[1])) != 0;
 }
 
+//===----------------------------------------------------------------------===//
+// libclang CXCursor APIs
+//===----------------------------------------------------------------------===//
+
+CXTranslationUnit clang_Cursor_getTranslationUnit(CXCursor cursor) {
+  return getCursorTU(cursor);
+}
+
 //===----------------------------------------------------------------------===//
 // CXCursorSet.
 //===----------------------------------------------------------------------===//

clang/tools/libclang/libclang.exports

@@ -20,6 +20,7 @@ clang_createCXCursorSet
 clang_createIndex
 clang_createTranslationUnit
 clang_createTranslationUnitFromSourceFile
+clang_Cursor_getTranslationUnit
 clang_defaultCodeCompleteOptions
 clang_defaultDiagnosticDisplayOptions
 clang_defaultEditingTranslationUnitOptions