3.9

1 files changed, 74 insertions, 0 deletions

diff --git a/shared/file_id.cpp b/shared/file_id.cpp
new file mode 100644
index 00000000..f61108c0
--- /dev/null
+++ b/shared/file_id.cpp
@@ -0,0 +1,74 @@
+// **************************************************************************
+// * 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) 2008-2010 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+//
+#include "file_id.h"
+
+#ifdef FFS_WIN
+#include "assert_static.h"
+#include <wx/msw/wrapwin.h> //includes "windows.h"
+#include "long_path_prefix.h"
+#include <boost/shared_ptr.hpp>
+
+#elif defined FFS_LINUX
+
+#endif
+
+
+
+#ifdef FFS_WIN
+util::FileID util::retrieveFileID(const Zstring& filename)
+{
+    //ensure our DWORD_FFS really is the same as DWORD
+    assert_static(sizeof(util::FileID::DWORD_FFS) == sizeof(DWORD));
+
+//WARNING: CreateFile() is SLOW, while GetFileInformationByHandle() is quite cheap!
+//http://msdn.microsoft.com/en-us/library/aa363788(VS.85).aspx
+
+    const HANDLE hFile = ::CreateFile(ffs3::applyLongPathPrefix(filename).c_str(),
+                                      0,
+                                      FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+                                      NULL,
+                                      OPEN_EXISTING,
+                                      FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, //FILE_FLAG_BACKUP_SEMANTICS needed to open a directory
+                                      NULL);
+    if (hFile != INVALID_HANDLE_VALUE)
+    {
+        boost::shared_ptr<void> dummy(hFile, ::CloseHandle);
+
+        BY_HANDLE_FILE_INFORMATION info;
+        if (::GetFileInformationByHandle(hFile, &info))
+        {
+            return util::FileID(info.dwVolumeSerialNumber,
+                                   info.nFileIndexHigh,
+                                   info.nFileIndexLow);
+        }
+    }
+    return util::FileID(); //empty ID
+}
+
+
+#elif defined FFS_LINUX
+util::FileID util::retrieveFileID(const Zstring& filename)
+{
+    struct stat fileInfo;
+    if (::lstat(filename.c_str(), &fileInfo) == 0) //lstat() does not resolve symlinks
+        return util::FileID(fileInfo.st_dev, fileInfo.st_ino);
+
+    return util::FileID(); //empty ID
+}
+#endif
+
+
+bool util::sameFileSpecified(const Zstring& file1, const Zstring& file2)
+{
+    const util::FileID id1 = retrieveFileID(file1);
+    const util::FileID id2 = retrieveFileID(file2);
+
+    if (id1 != FileID() && id2 != FileID())
+        return id1 == id2;
+
+    return false;
+}