/// <summary>
/// Gets data from the <see cref="cFStream" />
/// </summary>
/// <param name="cFStream"></param>
/// <param name="offset"></param>
/// <param name="count"></param>
/// <returns></returns>
/// <exception cref="CFDisposedException">Raised when the file is closed</exception>
internal byte[] GetData(CFStream cFStream, long offset, ref int count)
{
var directoryEntry = cFStream.DirEntry;
count = (int) Math.Min(directoryEntry.Size - offset, count);
StreamView streamView;
if (directoryEntry.Size < _header.MinSizeStandardStream)
{
streamView
= new StreamView(GetSectorChain(directoryEntry.StartSector, SectorType.Mini), Sector.MinisectorSize,
directoryEntry.Size,
SourceStream);
}
else
{
streamView = new StreamView(GetSectorChain(directoryEntry.StartSector, SectorType.Normal),
GetSectorSize(), directoryEntry.Size,
SourceStream);
}
var result = new byte[count];
streamView.Seek(offset, SeekOrigin.Begin);
streamView.Read(result, 0, result.Length);
return result;
}
/// <summary>
/// Gets data from the <see cref="cFStream" />
/// </summary>
/// <param name="cFStream"></param>
/// <returns></returns>
/// <exception cref="CFDisposedException">Raised when the file is closed</exception>
internal byte[] GetData(CFStream cFStream)
{
if (IsClosed)
throw new CFDisposedException("Compound File closed: cannot access data");
byte[] result;
var directoryEntry = cFStream.DirEntry;
if (directoryEntry.Size < _header.MinSizeStandardStream)
{
var miniView
= new StreamView(GetSectorChain(directoryEntry.StartSector, SectorType.Mini), Sector.MinisectorSize,
directoryEntry.Size,
SourceStream);
var br = new BinaryReader(miniView);
result = br.ReadBytes((int) directoryEntry.Size);
br.Close();
}
else
{
var sView
= new StreamView(GetSectorChain(directoryEntry.StartSector, SectorType.Normal), GetSectorSize(),
directoryEntry.Size,
SourceStream);
result = new byte[(int) directoryEntry.Size];
sView.Read(result, 0, result.Length);
}
return result;
}
private static string GetFileNameFromAttachDescStream(CFStream stream)
{
// https://msdn.microsoft.com/en-us/library/ee157577(v=exchg.80).aspx
if (stream == null) return null;
var ad = new AttachDescStream(stream);
if (!string.IsNullOrWhiteSpace(ad.LongFileName))
return ad.LongFileName;
if (!string.IsNullOrWhiteSpace(ad.DisplayName))
return ad.DisplayName;
if (!string.IsNullOrWhiteSpace(ad.FileName))
return ad.FileName;
return null;
}
