/// <summary>
/// Decodes the escher stream from a byte array and dumps the results to
/// a print stream.
/// </summary>
/// <param name="data">The data array containing the escher records.</param>
/// <param name="offset">The starting offset within the data array.</param>
/// <param name="size">The number of bytes to Read.</param>
public void Dump(byte[] data, int offset, int size)
{
EscherRecordFactory recordFactory = new DefaultEscherRecordFactory();
int pos = offset;
while (pos < offset + size)
{
EscherRecord r = recordFactory.CreateRecord(data, pos);
int bytesRead = r.FillFields(data, pos, recordFactory);
Console.WriteLine(r.ToString());
pos += bytesRead;
}
}
/// <summary>
/// The contract of this method is to deSerialize an escher record including
/// it's children.
/// </summary>
/// <param name="data">The byte array containing the Serialized escher
/// records.</param>
/// <param name="offset">The offset into the byte array.</param>
/// <param name="recordFactory">A factory for creating new escher records</param>
/// <returns>The number of bytes written.</returns>
public override int FillFields(byte[] data, int offset, EscherRecordFactory recordFactory)
{
int bytesRemaining = ReadHeader(data, offset);
int bytesWritten = 8;
offset += 8;
while (bytesRemaining > 0 && offset < data.Length)
{
EscherRecord child = recordFactory.CreateRecord(data, offset);
int childBytesWritten = child.FillFields(data, offset, recordFactory);
bytesWritten += childBytesWritten;
offset += childBytesWritten;
bytesRemaining -= childBytesWritten;
AddChildRecord(child);
if (offset >= data.Length && bytesRemaining > 0)
{
Console.WriteLine("WARNING: " + bytesRemaining + " bytes remaining but no space left");
}
}
return(bytesWritten);
}
/// <summary>
/// This method deSerializes the record from a byte array.
/// </summary>
/// <param name="data"> The byte array containing the escher record information</param>
/// <param name="offset">The starting offset into data </param>
/// <param name="recordFactory">May be null since this is not a container record.</param>
/// <returns>The number of bytes Read from the byte array.</returns>
public override int FillFields(byte[] data, int offset, EscherRecordFactory recordFactory)
{
int bytesRemaining = ReadHeader(data, offset);
/*
* Modified by Zhang Zhang
* Have a check between avaliable bytes and bytesRemaining,
* take the avaliable length if the bytesRemaining out of range.
* July 09, 2010
*/
int avaliable = data.Length - (offset + 8);
if (bytesRemaining > avaliable)
{
bytesRemaining = avaliable;
}
if (IsContainerRecord)
{
int bytesWritten = 0;
thedata = new byte[0];
offset += 8;
bytesWritten += 8;
while (bytesRemaining > 0)
{
EscherRecord child = recordFactory.CreateRecord(data, offset);
int childBytesWritten = child.FillFields(data, offset, recordFactory);
bytesWritten += childBytesWritten;
offset += childBytesWritten;
bytesRemaining -= childBytesWritten;
ChildRecords.Add(child);
}
return(bytesWritten);
}
else
{
thedata = new byte[bytesRemaining];
Array.Copy(data, offset + 8, thedata, 0, bytesRemaining);
return(bytesRemaining + 8);
}
}