Asn1PerInputStream Class Reference

Inheritance diagram for Asn1PerInputStream:

Public Member Functions
	Asn1PerInputStream (System.IO.Stream istream, bool aligned)
virtual int	Available ()
virtual void	Close ()
override void	Mark ()
virtual bool	MarkSupported ()
override void	Reset ()
override long	Skip (long nbytes)
Public Member Functions inherited from Asn1PerDecodeBuffer
	Asn1PerDecodeBuffer (byte[] msgdata, bool aligned)
	Asn1PerDecodeBuffer (System.IO.Stream istream, bool aligned)
virtual void	BinDump (System.String varName)
virtual void	BinDump (System.IO.StreamWriter outs, System.String varName)
override void	ByteAlign ()
virtual bool	DecodeBit (System.String ident)
override bool	DecodeBit ()
virtual int	DecodeBitsToInt (int nbits, System.String ident)
override int	DecodeBitsToInt (int nbits)
virtual long	DecodeBitsToLong (int nbits, System.String ident)
override long	DecodeBitsToLong (int nbits)
virtual void	DecodeBitsToOctetArray (byte[] data, int offset, int nbits, System.String ident)
virtual void	DecodeBitsToOctetArray (byte[] data, int offset, int bitOffset, int nbits, System.String ident)
override void	DecodeBitsToOctetArray (byte[] data, int offset, int nbits)
virtual void	DecodeCharString (int nchars, int abpc, int ubpc, Asn1CharSet charSet, System.Text.StringBuilder sbuf)
virtual long	DecodeConsWholeNumber (long rangeValue, System.String ident)
virtual long	DecodeConsWholeNumber (long rangeValue)
virtual long	DecodeExtLength ()
virtual long	DecodeInt (int nocts, bool signExtend, System.String ident)
virtual long	DecodeInt (int nocts, bool signExtend)
virtual long	DecodeLength ()
virtual long	DecodeLength (long lower, long upper)
virtual int	DecodeSmallLength ()
virtual int	DecodeSmallNonNegWholeNumber ()
virtual long	DecodeUnconsLength ()
virtual bool	IsAligned ()
virtual void	SetAligned (bool data)
void	SetSizeConstraint (long lower, long upper)
void	SetSizeConstraintExt (long lower, long upper, long extLower, long extUpper)
Public Member Functions inherited from Asn1DecodeBitBuffer
	Asn1DecodeBitBuffer (byte[] msgdata)
	Asn1DecodeBitBuffer (System.IO.Stream istream)
virtual void	DecodeBitsToOctetArray (byte[] data, int offset, int bitOffset, int nbits)
void	MoveBitCursor (long offset)
sealed override int	ReadByte ()
sealed override void	SetInputStream (byte[] msgdata, int offset, int length)
Public Member Functions inherited from Asn1DecodeBuffer
virtual void	AddCaptureBuffer (System.IO.MemoryStream buffer)
virtual void	Capture (int nbytes)
virtual long	DecodeIntValue (int length, bool signExtend)
virtual int []	DecodeOIDContents (int llen)
virtual int []	DecodeRelOIDContents (int llen)
override System.IO.Stream	GetInputStream ()
virtual void	HexDump ()
virtual void	MarkPos (ref BufferPos bufferPos)
virtual int	Read ()
virtual void	Read (byte[] buffer, int offset, int nbytes)
virtual void	Read (byte[] buffer)
int	Read2Bytes ()
int	Read4Bytes ()
virtual void	RemoveCaptureBuffer (System.IO.MemoryStream buffer)
virtual void	ResetPos (ref BufferPos bufferPos)
Public Member Functions inherited from Asn1MessageBuffer
virtual void	AddNamedEventHandler (Asn1NamedEventHandler handler)
virtual void	InvokeCharacters (System.String svalue)
virtual void	InvokeEndElement (System.String name, int index)
virtual void	InvokeStartElement (System.String name, int index)
Public Member Functions inherited from Asn1MessageBufferBase
void	SetKey (byte[] rtkey)
void	SetPermanentKey (byte[] rtkey)
Public Member Functions inherited from Asn1PerMessageBuffer
System.IO.Stream	GetInputStream ()

Additional Inherited Members
Static Public Member Functions inherited from Asn1PerDecodeBuffer
static Asn1PerDecodeBuffer	SetBuffer (Asn1PerDecodeBuffer buffer, byte[] msgdata, bool aligned)
Static Public Member Functions inherited from Asn1MessageBufferBase
static void	HexDump (System.IO.Stream ins, System.IO.StreamWriter outs)
static void	HexDump (System.IO.Stream ins)
Properties inherited from Asn1PerDecodeBuffer
virtual Asn1PerTraceHandler	TraceHandler [get]
Properties inherited from Asn1DecodeBitBuffer
virtual long	BitOffset [get]
virtual int	MsgBitCnt [get]
Properties inherited from Asn1DecodeBuffer
virtual int	ByteCount [get]
bool	LazyOpenTypeDecode [get, set]
Properties inherited from Asn1MessageBuffer
virtual Asn1MessageBuffer	EventHandlerList [set]
Properties inherited from Asn1MessageBufferBase
Asn1Context	Context [get]
virtual short	TypeCode [set]
Properties inherited from Asn1PerMessageBuffer
int	MsgBitCnt [get]
Asn1PerTraceHandler	TraceHandler [get]

Detailed Description

This class handles the input stream for decoding of ASN.1 messages as specified in the Packed Encoding Rules (PER) ITU-T X.691 standard.

Constructor & Destructor Documentation

Asn1PerInputStream()

Asn1PerInputStream	(	System.IO.Stream	istream,
		bool	aligned
	)

This constructor creates a PER input stream object that references an encoded ASN.1 message. In this case, the message is passed in using an System.IO.Stream object.

Parameters

istream	Input stream containing an encoded ASN.1 message.
aligned	Boolean specifying PER aligned or unaligned encoding.

Member Function Documentation

Available()

virtual int Available ( )

virtual

Returns the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream. The next caller might be the same thread or another thread.

Returns

the number of bytes that can be read from this input stream without blocking.

Exceptions

System.SystemException

if an I/O error occurs.

Implements Asn1InputStream.

Close()

virtual void Close ( )

virtual

Closes this input stream and releases any system resources associated with the stream.

Exceptions

System.SystemException

if an I/O error occurs.

Implements Asn1InputStream.

Mark()

override void Mark

(

)

This method is used to mark the current position in the input stream for retry processing or reseting the input stream position to current position.

Implements Asn1InputStream.

MarkSupported()

virtual bool MarkSupported ( )

virtual

Tests if this input stream supports the seeking. This method is equivalent to C# CanSeek method of System.IO.Stream.

Returns

true if input stream supports seeking; Otherwise false.

Implements Asn1InputStream.

Reset()

override void Reset

(

)

This method is used to reset the current position in the input stream back to the location of the last 'mark' call. It is equivalent to calling 'Stream.Position' to marked location.

Implements Asn1InputStream.

Skip()

override long Skip

(

long

nbytes

)

This method will skip over the requested number of bytes in the input stream.

Parameters

nbytes

Number of bytes to skip

Exceptions

System.SystemException

if an I/O error occurs.

Returns

Skipped number of bytes

Implements Asn1InputStream.