internal static DateTime GetLastWriteTimeInternal(KernelTransaction transaction, string path, bool getUtc, PathFormat pathFormat)
{
NativeMethods.FileTime lastWriteTime = GetAttributesExInternal <NativeMethods.Win32FileAttributeData>(transaction, path, pathFormat).LastWriteTime;
return(getUtc
? DateTime.FromFileTimeUtc(lastWriteTime)
: DateTime.FromFileTime(lastWriteTime));
}
internal static DateTime GetCreationTimeInternal(KernelTransaction transaction, string path, bool returnUtc, PathFormat pathFormat)
{
NativeMethods.FileTime creationTime = GetAttributesExInternal <NativeMethods.Win32FileAttributeData>(transaction, path, pathFormat).CreationTime;
return(returnUtc
? DateTime.FromFileTimeUtc(creationTime)
: DateTime.FromFileTime(creationTime));
}
internal static DateTime GetChangeTimeInternal(bool isFolder, KernelTransaction transaction, SafeFileHandle safeHandle, string path, bool getUtc, PathFormat pathFormat)
{
if (!NativeMethods.IsAtLeastWindowsVista)
{
throw new PlatformNotSupportedException(Resources.RequiresWindowsVistaOrHigher);
}
bool callerHandle = safeHandle != null;
if (!callerHandle)
{
if (pathFormat != PathFormat.LongFullPath && Utils.IsNullOrWhiteSpace(path))
{
throw new ArgumentNullException("path");
}
string pathLp = Path.GetExtendedLengthPathInternal(transaction, path, pathFormat, GetFullPathOptions.RemoveTrailingDirectorySeparator | GetFullPathOptions.CheckInvalidPathChars);
safeHandle = CreateFileInternal(transaction, pathLp, isFolder ? ExtendedFileAttributes.BackupSemantics : ExtendedFileAttributes.Normal, null, FileMode.Open, FileSystemRights.ReadData, FileShare.ReadWrite, true, PathFormat.LongFullPath);
}
try
{
NativeMethods.IsValidHandle(safeHandle);
using (var safeBuffer = new SafeGlobalMemoryBufferHandle(IntPtr.Size + Marshal.SizeOf(typeof(NativeMethods.FileBasicInfo))))
{
NativeMethods.FileBasicInfo fbi;
if (!NativeMethods.GetFileInformationByHandleEx_FileBasicInfo(safeHandle, NativeMethods.FileInfoByHandleClass.FileBasicInfo, out fbi, (uint)safeBuffer.Capacity))
{
NativeError.ThrowException(Marshal.GetLastWin32Error());
}
safeBuffer.StructureToPtr(fbi, true);
NativeMethods.FileTime changeTime = safeBuffer.PtrToStructure <NativeMethods.FileBasicInfo>().ChangeTime;
return(getUtc
? DateTime.FromFileTimeUtc(changeTime)
: DateTime.FromFileTime(changeTime));
}
}
finally
{
// Handle is ours, dispose.
if (!callerHandle && safeHandle != null)
{
safeHandle.Close();
}
}
}
