public ComStream(win32.IStream source)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
this.source = source;
this.mInt64 = iop.Marshal.AllocCoTaskMem(8);
}
public void CopyTo(win32.IStream pstm, long cb, IntPtr pcbRead, IntPtr pcbWritten)
{
if (!this.source.CanRead)
{
throw new NotSupportedException("Source stream doesn't support reading.");
}
using (var destination = new ComStream(pstm))
{
if (!destination.CanWrite)
{
throw new NotSupportedException("Destination stream doesn't support writing.");
}
var buffer = MemoryPool <byte> .GetArray();
try
{
var totalBytesRead = 0L;
var totalBytesWritten = 0L;
var chunkLength = buffer.Length;
if (cb < chunkLength)
{
chunkLength = (int)cb;
}
while (totalBytesWritten < cb)
{
// Read
var bytesRead = this.source.Read(buffer, 0, chunkLength);
if (bytesRead == 0)
{
break;
}
totalBytesRead += bytesRead;
// Write
var previousPosition = destination.Position;
destination.Write(buffer, 0, bytesRead);
var bytesWritten = destination.Position - previousPosition;
if (bytesWritten == 0)
{
break;
}
totalBytesWritten += bytesWritten;
if (bytesRead != bytesWritten)
{
break;
}
}
iop.Marshal.WriteInt64(pcbRead, totalBytesRead);
iop.Marshal.WriteInt64(pcbWritten, totalBytesWritten);
}
finally
{
MemoryPool <byte> .PutArray(buffer);
}
}
}
public ComStream(win32.IStream source)
{
this.source = source;
this.mInt64 = iop.Marshal.AllocCoTaskMem(8);
}
public void Clone(out win32.IStream ppstm)
{
ppstm = new ComIStream(this.source);
}