From d6e9fa55eba409648503e87f20cde0b3e11c9d71 Mon Sep 17 00:00:00 2001
From: Argyrios Kyrtzidis <akyrtzi@gmail.com>
Date: Tue, 27 Sep 2011 00:30:30 +0000
Subject: [PATCH] [libclang] Introduce clang_Cursor_isNull and
 clang_Cursor_getTranslationUnit functions.

llvm-svn: 140587
---
 clang/include/clang-c/Index.h         | 12 ++++++++++++
 clang/tools/libclang/CXCursor.cpp     |  8 ++++++++
 clang/tools/libclang/libclang.exports |  1 +
 3 files changed, 21 insertions(+)

diff --git a/clang/include/clang-c/Index.h b/clang/include/clang-c/Index.h
index 07bcf9eec6ed..6bd0286d6ecf 100644
--- a/clang/include/clang-c/Index.h
+++ b/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.
diff --git a/clang/tools/libclang/CXCursor.cpp b/clang/tools/libclang/CXCursor.cpp
index eb54ed2b6889..c0e038467fbb 100644
--- a/clang/tools/libclang/CXCursor.cpp
+++ b/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.
 //===----------------------------------------------------------------------===//
diff --git a/clang/tools/libclang/libclang.exports b/clang/tools/libclang/libclang.exports
index d01bb07f0c89..71cd2614385d 100644
--- a/clang/tools/libclang/libclang.exports
+++ b/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