From ac08b26611860e16d95c6cd49b444cd5d84cc1de Mon Sep 17 00:00:00 2001
From: Argyrios Kyrtzidis <akyrtzi@gmail.com>
Date: Sat, 26 Jan 2013 04:52:52 +0000
Subject: [libclang] Introduce clang_getFileUniqueID which returns a struct for
 a CXFile containing device/inode/modification time.

Intended to be useful as a key associated with a unique file across
an indexing session.

rdar://13091837

llvm-svn: 173559
---
 clang/tools/libclang/CIndex.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'clang/tools/libclang/CIndex.cpp')

diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
index 5d492417bae..a8517091acb 100644
--- a/clang/tools/libclang/CIndex.cpp
+++ b/clang/tools/libclang/CIndex.cpp
@@ -2960,6 +2960,21 @@ unsigned clang_isFileMultipleIncludeGuarded(CXTranslationUnit tu, CXFile file) {
                                           .isFileMultipleIncludeGuarded(FEnt);
 }
 
+int clang_getFileUniqueID(CXFile file, CXFileUniqueID *outID) {
+  if (!file || !outID)
+    return 1;
+
+#ifdef LLVM_ON_WIN32
+  return 1; // inodes not supported on windows.
+#else
+  FileEntry *FEnt = static_cast<FileEntry *>(file);
+  outID->data[0] = FEnt->getDevice();
+  outID->data[1] = FEnt->getInode();
+  outID->data[2] = FEnt->getModificationTime();
+  return 0;
+#endif
+}
+
 } // end: extern "C"
 
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