/// <summary>
///
/// </summary>
/// <param name="sourceStream"></param>
/// <param name="sourceVersion"></param>
/// <returns></returns>
public static AVM1.AbstractAction Create(BinaryReader sourceStream, byte sourceVersion)
{
AbstractAction product = null;
byte firstByte = sourceStream.ReadByte();
sourceStream.BaseStream.Seek(-1, SeekOrigin.Current);
//
// Obtain the name of the action
//
string actionName = ActionName((AVM1Actions)firstByte);
if (null != actionName)
{
product = (AbstractAction)MethodBase.GetCurrentMethod().DeclaringType.Assembly.CreateInstance("Recurity.Swf.AVM1." + actionName);
}
else
{
AVM1ExceptionByteCodeFormat e = new AVM1ExceptionByteCodeFormat("Illegal ActionCode 0x" + firstByte.ToString("X"));
Log.Error(System.Reflection.MethodBase.GetCurrentMethod(), e);
throw e;
}
product.Read(sourceStream, sourceVersion);
return product;
}
/// <summary>
///
/// </summary>
/// <param name="output"></param>
public void Write( Stream output )
{
long pos = output.Position;
BinaryWriter bw = new BinaryWriter( output );
bw.Write( _actionCode );
//
// When the MSB of the action is set, a length field MUST follow
if ( 0 != ( _actionCode & 0x80 ) )
{
//
// fancy action, let it do the rendering into a MemoryStream
//
using ( MemoryStream ms = new MemoryStream() )
{
BinaryWriter mbw = new BinaryWriter( ms );
ulong innerLength = Render( mbw );
if ( innerLength > 0xFFFF )
{
AVM1ExceptionByteCodeFormat e = new AVM1ExceptionByteCodeFormat( "Rendered action is larger than 0xFFFF bytes" );
Log.Error(this, e );
throw e;
}
UInt16 writeLength = ( UInt16 )innerLength;
bw.Write( writeLength );
//
// Yes, this check makes sense. See ActionCall.
//
if ( innerLength > 0 )
{
ms.WriteTo( output );
}
if ( innerLength != _length )
{
AVM1ExceptionByteCodeFormat e = new AVM1ExceptionByteCodeFormat( "Rendered action size differs from _length (" + innerLength.ToString( "d" ) + " vs. " + _length.ToString( "d" ) );
Log.Error(this, e );
throw e;
}
}
}
//Log.Debug(this, this.ToString() + " (" + ( output.Position - pos ).ToString("d") + " bytes)" );
}
