1 files changed, 65 insertions, 0 deletions
diff --git a/zen/file_id_def.h b/zen/file_id_def.h
new file mode 100644
index 00000000..b2029879
--- /dev/null
+++ b/zen/file_id_def.h
@@ -0,0 +1,65 @@
+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+
+#ifndef FILE_ID_INTERNAL_HEADER_013287632486321493
+#define FILE_ID_INTERNAL_HEADER_013287632486321493
+
+#include <utility>
+#include "assert_static.h"
+
+#ifdef FFS_WIN
+#include "win.h" //includes "windows.h"
+
+#elif defined FFS_LINUX
+#include <sys/stat.h>
+#endif
+
+
+namespace zen
+{
+#ifdef FFS_WIN
+typedef std::pair<decltype(BY_HANDLE_FILE_INFORMATION().dwVolumeSerialNumber), decltype(ULARGE_INTEGER().QuadPart)> FileId; //(volume serial number, file ID)
+
+inline
+FileId extractFileID(const BY_HANDLE_FILE_INFORMATION& fileInfo)
+{
+    ULARGE_INTEGER uint = {};
+    uint.HighPart = fileInfo.nFileIndexHigh;
+    uint.LowPart  = fileInfo.nFileIndexLow;
+    return std::make_pair(fileInfo.dwVolumeSerialNumber, uint.QuadPart);
+}
+
+inline
+FileId extractFileID(DWORD dwVolumeSerialNumber, ULARGE_INTEGER fileId)
+{
+    return std::make_pair(dwVolumeSerialNumber, fileId.QuadPart);
+}
+
+namespace impl
+{
+inline
+void validate(const FileId& id, const BY_HANDLE_FILE_INFORMATION& fileInfo)
+{
+    assert_static(sizeof(id.second) == sizeof(fileInfo.nFileIndexHigh) + sizeof(fileInfo.nFileIndexLow));
+    assert_static(sizeof(id.first ) == sizeof(DWORD));
+    assert_static(sizeof(id.second) == sizeof(ULARGE_INTEGER));
+}
+}
+
+#elif defined FFS_LINUX
+namespace impl { typedef struct ::stat StatDummy; } //sigh...
+
+typedef std::pair<decltype(impl::StatDummy::st_dev), decltype(impl::StatDummy::st_ino)> FileId; //(device id, inode)
+
+inline
+FileId extractFileID(const struct stat& fileInfo)
+{
+    return std::make_pair(fileInfo.st_dev, fileInfo.st_ino);
+}
+#endif
+}
+
+#endif //FILE_ID_INTERNAL_HEADER_013287632486321493