public static IEnumerable <FileDataStream> EnumerateDataStreams(this FileInfo file)
{
if (file == null)
{
throw new ArgumentNullException(nameof(file));
}
// init locals
var fpath = file.FullName;
var fsd = new Interop.FindStreamData();
AsIntPtr(ref fsd, out var fsdptr);
var hFindStream = Interop.INVALID_HANDLE_VALUE;
try
{
// check if we can get any stream
if (!FindFirstStream(fpath, fsdptr, out hFindStream))
{
yield break;
}
// Extract stream info
ExtractStreamInfo(fsd.PtrToString(), out var streamName, out var streamType);
yield return(new FileDataStream(file, streamName, fsd.StreamSize, streamType));
// Extract more streams until we run out
while (FindNextStream(fsdptr, hFindStream))
{
ExtractStreamInfo(fsd.PtrToString(), out streamName, out streamType);
yield return(new FileDataStream(file, streamName, fsd.StreamSize, streamType));
}
}
finally
{
if (hFindStream != Interop.INVALID_HANDLE_VALUE)
{
FindClose(hFindStream);
}
}
}
private static unsafe string PtrToString(this Interop.FindStreamData fsd) => new string(fsd.cStreamName);
