public void Parse( Stream input )
{
BitStream bits = new BitStream( input );
ClipEventKeyUp = ( 1 == bits.GetBits( 1 ) ); // 0
ClipEventKeyDown = ( 1 == bits.GetBits( 1 ) ); // 1
ClipEventMouseUp = ( 1 == bits.GetBits( 1 ) ); // 2
ClipEventMouseDown = ( 1 == bits.GetBits( 1 ) ); // 3
ClipEventMouseMove = ( 1 == bits.GetBits( 1 ) ); // 4
ClipEventUnload = ( 1 == bits.GetBits( 1 ) ); // 5
ClipEventEnterFrame = ( 1 == bits.GetBits( 1 ) ); // 6
ClipEventLoad = ( 1 == bits.GetBits( 1 ) ); // 7
if ( this.Version >= 6 )
{
// Swf6 and following
ClipEventDragOver = ( 1 == bits.GetBits( 1 ) );
ClipEventRollOut = ( 1 == bits.GetBits( 1 ) );
ClipEventRollOver = ( 1 == bits.GetBits( 1 ) );
ClipEventReleaseOutside = ( 1 == bits.GetBits( 1 ) );
ClipEventRelease = ( 1 == bits.GetBits( 1 ) );
ClipEventPress = ( 1 == bits.GetBits( 1 ) );
ClipEventInitialize = ( 1 == bits.GetBits( 1 ) );
ClipEventData = ( 1 == bits.GetBits( 1 ) );
uint reserved = bits.GetBits( 5 );
if ( 0 != reserved )
{
throw new SwfFormatException( "Reserved flags (following ClipEventData) used in ClipEventFlags" );
}
// Swf6, used in Swf7
if ( ( ClipEventConstruct = ( 1 == bits.GetBits( 1 ) ) ) && ( this.Version < 7 ) )
{
throw new SwfFormatException( "ClipEventConstruct in Swf with Version < 7" );
}
ClipEventKeyPress = ( 1 == bits.GetBits( 1 ) );
ClipEventDragOut = ( 1 == bits.GetBits( 1 ) );
uint reserved2 = bits.GetBits( 8 );
if ( 0 != reserved2 )
{
throw new SwfFormatException( "Reserved flags (following ClipEventDragOut) used in ClipEventFlags" );
}
}
else
{
//
// Swf spec mentiones that CLIPEVENTFLAGS is 2 Bytes in
// Swf.Version < 6, but doesn't specify a Reserved 8-Bit field
// explicitly. So we handle it like one.
//
uint reservedB46 = bits.GetBits( 8 );
if ( 0 != reservedB46 )
{
throw new SwfFormatException( "Reserved flags (following ClipEventLoad) used in ClipEventFlags" );
}
}
}
/// <summary>
///
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public bool Parse( Stream input )
{
AVM1InstructionSequence bytecode;
_ParsingFailures = false;
_ClipEventFlags = new ClipEventFlags( this.Version );
_ClipEventFlags.Parse( input );
BinaryReader br = new BinaryReader( input );
_length = br.ReadUInt32();
_codeSize = _length;
if ( _ClipEventFlags.ClipEventKeyPress )
{
if ( 1 > _length )
{
throw new SwfFormatException( "ClipActionRecord length=0 but KeyCode indicated by ClipEventKeyPress" );
}
_KeyCode = br.ReadByte();
_codeSize--;
}
long before = br.BaseStream.Position;
try
{
bytecode = Helper.SwfCodeReader.GetCode( _codeSize, br, this.Version );
if ( br.BaseStream.Position != ( before + _codeSize ) )
{
throw new SwfFormatException( "ClipActionRecord code reader consumed more than length indicated (" +
( ( uint )( br.BaseStream.Position - before ) ).ToString() + " consumed, " +
_codeSize + " length)" );
}
}
catch ( AVM1ExceptionByteCodeFormat ave )
{
Log.Error(this, ave );
_ParsingFailures = true;
if (SwfFile.Configuration.AVM1DeleteInvalidBytecode)
{
bytecode = new AVM1InstructionSequence();
}
else
{
SwfFormatException swfe = new SwfFormatException( "ClipActionRecord parsing error", ave );
throw swfe;
}
}
finally
{
//
// make sure that the input stream is at the right position
// it would have if code reading would have been successful
//
long diff = ( before + _codeSize ) - br.BaseStream.Position;
if ( 0 != diff )
br.BaseStream.Seek( diff, SeekOrigin.Current );
}
_Code = new AVM1Code( bytecode );
return _ParsingFailures;
}
