/// <summary>
/// Called when [read data].
/// </summary>
/// <param name="buffer">The buffer.</param>
/// <param name="offset">The offset.</param>
/// <param name="count">The count.</param>
protected virtual int OnReadData
(
byte[] buffer,
int offset,
int count)
{
ArgumentUtility.NotNull
(
buffer,
"buffer");
ArgumentUtility.Nonnegative
(
offset,
"offset");
ArgumentUtility.Nonnegative
(
count,
"count");
bool cancel = false;
DataTransferEventHandler handler = ReadData;
if (handler != null)
{
DataTransferEventArgs ea = new DataTransferEventArgs
(
this,
buffer,
offset,
count);
handler
(
this,
ea);
cancel = ea.Cancel;
buffer = ea.Buffer;
offset = ea.Offset;
count = ea.Count;
if (cancel)
{
return(ea.Transferred);
}
}
return(InnerStream.Read
(
buffer,
offset,
count));
}
/// <summary>
/// Called when [write data].
/// </summary>
/// <param name="buffer">The buffer.</param>
/// <param name="offset">The offset.</param>
/// <param name="count">The count.</param>
protected virtual void OnWriteData
(
byte[] buffer,
int offset,
int count)
{
ArgumentUtility.NotNull
(
buffer,
"buffer");
ArgumentUtility.Nonnegative
(
offset,
"offset");
ArgumentUtility.Nonnegative
(
count,
"count");
bool cancel = false;
DataTransferEventHandler handler = WriteData;
if (handler != null)
{
DataTransferEventArgs ea = new DataTransferEventArgs
(
this,
buffer,
offset,
count);
handler
(
this,
ea);
cancel = ea.Cancel;
buffer = ea.Buffer;
offset = ea.Offset;
count = ea.Count;
}
if (!cancel)
{
InnerStream.Write
(
buffer,
offset,
count);
}
}
