Crypto++ 8.7
Free C++ class library of cryptographic schemes
Classes | Public Member Functions | List of all members
MeterFilter Class Reference

Measure how many bytes and messages pass through the filter. More...

#include <filters.h>

+ Inheritance diagram for MeterFilter:

Public Member Functions

 MeterFilter (BufferedTransformation *attachment=NULL, bool transparent=true)
 Construct a MeterFilter. More...
 
void SetTransparent (bool transparent)
 Set or change the transparent mode of this object. More...
 
void AddRangeToSkip (unsigned int message, lword position, lword size, bool sortNow=true)
 Adds a range to skip during processing. More...
 
void ResetMeter ()
 Resets the meter. More...
 
void IsolatedInitialize (const NameValuePairs &parameters)
 Initialize or reinitialize this object, without signal propagation. More...
 
lword GetCurrentMessageBytes () const
 Number of bytes in the current message. More...
 
lword GetTotalBytes () const
 Number of bytes processed by the filter. More...
 
unsigned int GetCurrentSeriesMessages () const
 Message number in the series. More...
 
unsigned int GetTotalMessages () const
 Number of messages in the message series. More...
 
unsigned int GetTotalMessageSeries () const
 Number of messages processed by the filter. More...
 
byteCreatePutSpace (size_t &size)
 Request space which can be written into by the caller. More...
 
size_t Put2 (const byte *inString, size_t length, int messageEnd, bool blocking)
 Input multiple bytes for processing. More...
 
size_t PutModifiable2 (byte *inString, size_t length, int messageEnd, bool blocking)
 Input multiple bytes that may be modified by callee. More...
 
bool IsolatedMessageSeriesEnd (bool blocking)
 Marks the end of a series of messages, without signal propagation. More...
 
- Public Member Functions inherited from Bufferless< Filter >
bool IsolatedFlush (bool hardFlush, bool blocking)
 Flushes data buffered by this object, without signal propagation. More...
 
- Public Member Functions inherited from Filter
 Filter (BufferedTransformation *attachment=NULL)
 Construct a Filter. More...
 
bool Attachable ()
 Determine if attachable. More...
 
BufferedTransformationAttachedTransformation ()
 Retrieve attached transformation. More...
 
const BufferedTransformationAttachedTransformation () const
 Retrieve attached transformation. More...
 
void Detach (BufferedTransformation *newAttachment=NULL)
 Replace an attached transformation. More...
 
size_t TransferTo2 (BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
 Transfer bytes from this object to another BufferedTransformation. More...
 
size_t CopyRangeTo2 (BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const
 Copy bytes from this object to another BufferedTransformation. More...
 
void Initialize (const NameValuePairs &parameters=g_nullNameValuePairs, int propagation=-1)
 Initialize or reinitialize this object, with signal propagation. More...
 
bool Flush (bool hardFlush, int propagation=-1, bool blocking=true)
 Flush buffered input and/or output, with signal propagation. More...
 
bool MessageSeriesEnd (int propagation=-1, bool blocking=true)
 Marks the end of a series of messages, with signal propagation. More...
 
- Public Member Functions inherited from BufferedTransformation
 BufferedTransformation ()
 Construct a BufferedTransformation. More...
 
BufferedTransformationRef ()
 Provides a reference to this object. More...
 
virtual void Attach (BufferedTransformation *newAttachment)
 Add newAttachment to the end of attachment chain. More...
 
size_t Put (byte inByte, bool blocking=true)
 Input a byte for processing. More...
 
size_t Put (const byte *inString, size_t length, bool blocking=true)
 Input a byte buffer for processing. More...
 
size_t PutWord16 (word16 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 16-bit word for processing. More...
 
size_t PutWord32 (word32 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 32-bit word for processing. More...
 
size_t PutWord64 (word64 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 64-bit word for processing. More...
 
virtual bool CanModifyInput () const
 Determines whether input can be modified by the callee. More...
 
size_t PutModifiable (byte *inString, size_t length, bool blocking=true)
 Input multiple bytes that may be modified by callee. More...
 
bool MessageEnd (int propagation=-1, bool blocking=true)
 Signals the end of messages to the object. More...
 
size_t PutMessageEnd (const byte *inString, size_t length, int propagation=-1, bool blocking=true)
 Input multiple bytes for processing and signal the end of a message. More...
 
unsigned int GetMaxWaitObjectCount () const
 Retrieves the maximum number of waitable objects. More...
 
void GetWaitObjects (WaitObjectContainer &container, CallStack const &callStack)
 Retrieves waitable objects. More...
 
virtual void SetAutoSignalPropagation (int propagation)
 Set propagation of automatically generated and transferred signals. More...
 
virtual int GetAutoSignalPropagation () const
 Retrieve automatic signal propagation value. More...
 
virtual lword MaxRetrievable () const
 Provides the number of bytes ready for retrieval. More...
 
virtual bool AnyRetrievable () const
 Determines whether bytes are ready for retrieval. More...
 
virtual size_t Get (byte &outByte)
 Retrieve a 8-bit byte. More...
 
virtual size_t Get (byte *outString, size_t getMax)
 Retrieve a block of bytes. More...
 
virtual size_t Peek (byte &outByte) const
 Peek a 8-bit byte. More...
 
virtual size_t Peek (byte *outString, size_t peekMax) const
 Peek a block of bytes. More...
 
size_t GetWord16 (word16 &value, ByteOrder order=BIG_ENDIAN_ORDER)
 Retrieve a 16-bit word. More...
 
size_t GetWord32 (word32 &value, ByteOrder order=BIG_ENDIAN_ORDER)
 Retrieve a 32-bit word. More...
 
size_t GetWord64 (word64 &value, ByteOrder order=BIG_ENDIAN_ORDER)
 Retrieve a 64-bit word. More...
 
size_t PeekWord16 (word16 &value, ByteOrder order=BIG_ENDIAN_ORDER) const
 Peek a 16-bit word. More...
 
size_t PeekWord32 (word32 &value, ByteOrder order=BIG_ENDIAN_ORDER) const
 Peek a 32-bit word. More...
 
size_t PeekWord64 (word64 &value, ByteOrder order=BIG_ENDIAN_ORDER) const
 Peek a 64-bit word. More...
 
lword TransferTo (BufferedTransformation &target, lword transferMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL)
 move transferMax bytes of the buffered output to target as input More...
 
virtual lword Skip (lword skipMax=LWORD_MAX)
 Discard skipMax bytes from the output buffer. More...
 
lword CopyTo (BufferedTransformation &target, lword copyMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL) const
 Copy bytes from this object to another BufferedTransformation. More...
 
lword CopyRangeTo (BufferedTransformation &target, lword position, lword copyMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL) const
 Copy bytes from this object using an index to another BufferedTransformation. More...
 
virtual lword TotalBytesRetrievable () const
 Provides the number of bytes ready for retrieval. More...
 
virtual unsigned int NumberOfMessages () const
 Provides the number of meesages processed by this object. More...
 
virtual bool AnyMessages () const
 Determines if any messages are available for retrieval. More...
 
virtual bool GetNextMessage ()
 Start retrieving the next message. More...
 
virtual unsigned int SkipMessages (unsigned int count=UINT_MAX)
 Skip a number of meessages. More...
 
unsigned int TransferMessagesTo (BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL)
 Transfer messages from this object to another BufferedTransformation. More...
 
unsigned int CopyMessagesTo (BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL) const
 Copy messages from this object to another BufferedTransformation. More...
 
virtual void SkipAll ()
 Skip all messages in the series.
 
void TransferAllTo (BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL)
 Transfer all bytes from this object to another BufferedTransformation. More...
 
void CopyAllTo (BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL) const
 Copy messages from this object to another BufferedTransformation. More...
 
virtual bool GetNextMessageSeries ()
 Retrieve the next message in a series. More...
 
virtual unsigned int NumberOfMessagesInThisSeries () const
 Provides the number of messages in a series. More...
 
virtual unsigned int NumberOfMessageSeries () const
 Provides the number of messages in a series. More...
 
size_t TransferMessagesTo2 (BufferedTransformation &target, unsigned int &messageCount, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
 Transfer messages from this object to another BufferedTransformation. More...
 
size_t TransferAllTo2 (BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true)
 Transfer all bytes from this object to another BufferedTransformation. More...
 
size_t ChannelPut (const std::string &channel, byte inByte, bool blocking=true)
 Input a byte for processing on a channel. More...
 
size_t ChannelPut (const std::string &channel, const byte *inString, size_t length, bool blocking=true)
 Input a byte buffer for processing on a channel. More...
 
size_t ChannelPutModifiable (const std::string &channel, byte *inString, size_t length, bool blocking=true)
 Input multiple bytes that may be modified by callee on a channel. More...
 
size_t ChannelPutWord16 (const std::string &channel, word16 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 16-bit word for processing on a channel. More...
 
size_t ChannelPutWord32 (const std::string &channel, word32 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 32-bit word for processing on a channel. More...
 
size_t ChannelPutWord64 (const std::string &channel, word64 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true)
 Input a 64-bit word for processing on a channel. More...
 
bool ChannelMessageEnd (const std::string &channel, int propagation=-1, bool blocking=true)
 Signal the end of a message. More...
 
size_t ChannelPutMessageEnd (const std::string &channel, const byte *inString, size_t length, int propagation=-1, bool blocking=true)
 Input multiple bytes for processing and signal the end of a message. More...
 
virtual byteChannelCreatePutSpace (const std::string &channel, size_t &size)
 Request space which can be written into by the caller. More...
 
virtual size_t ChannelPut2 (const std::string &channel, const byte *inString, size_t length, int messageEnd, bool blocking)
 Input multiple bytes for processing on a channel. More...
 
virtual size_t ChannelPutModifiable2 (const std::string &channel, byte *inString, size_t length, int messageEnd, bool blocking)
 Input multiple bytes that may be modified by callee on a channel. More...
 
virtual bool ChannelFlush (const std::string &channel, bool hardFlush, int propagation=-1, bool blocking=true)
 Flush buffered input and/or output on a channel. More...
 
virtual bool ChannelMessageSeriesEnd (const std::string &channel, int propagation=-1, bool blocking=true)
 Marks the end of a series of messages on a channel. More...
 
virtual void SetRetrievalChannel (const std::string &channel)
 Sets the default retrieval channel. More...
 
- Public Member Functions inherited from Algorithm
 Algorithm (bool checkSelfTestStatus=true)
 Interface for all crypto algorithms. More...
 
virtual std::string AlgorithmName () const
 Provides the name of this algorithm. More...
 
virtual std::string AlgorithmProvider () const
 Retrieve the provider of this algorithm. More...
 
- Public Member Functions inherited from Clonable
virtual ClonableClone () const
 Copies this object. More...
 
- Public Member Functions inherited from Waitable
virtual unsigned int GetMaxWaitObjectCount () const =0
 Maximum number of wait objects that this object can return. More...
 
virtual void GetWaitObjects (WaitObjectContainer &container, CallStack const &callStack)=0
 Retrieves waitable objects. More...
 
bool Wait (unsigned long milliseconds, CallStack const &callStack)
 Wait on this object. More...
 

Detailed Description

Measure how many bytes and messages pass through the filter.

measure how many bytes and messages pass through the filter. The filter also serves as valve by maintaining a list of ranges to skip during processing.

Definition at line 232 of file filters.h.

Constructor & Destructor Documentation

◆ ~MeterFilter()

virtual MeterFilter::~MeterFilter ( )
inlinevirtual

Definition at line 235 of file filters.h.

◆ MeterFilter()

MeterFilter::MeterFilter ( BufferedTransformation attachment = NULL,
bool  transparent = true 
)
inline

Construct a MeterFilter.

Parameters
attachmentan optional attached transformation
transparentflag indicating if the filter should function transparently

attachment can be NULL. The filter is transparent by default. If the filter is transparent, then PutMaybeModifiable() does not process a request and always returns 0.

Definition at line 242 of file filters.h.

Member Function Documentation

◆ SetTransparent()

void MeterFilter::SetTransparent ( bool  transparent)
inline

Set or change the transparent mode of this object.

Parameters
transparentthe new transparent mode

Definition at line 249 of file filters.h.

◆ AddRangeToSkip()

void MeterFilter::AddRangeToSkip ( unsigned int  message,
lword  position,
lword  size,
bool  sortNow = true 
)

Adds a range to skip during processing.

Parameters
messagethe message to apply the range
positionthe 0-based index in the current stream
sizethe length of the range
sortNowflag indicating whether the range should be sorted

Internally, MeterFilter maitains a deque of ranges to skip. As messages are processed, ranges of bytes are skipped according to the list of ranges.

◆ ResetMeter()

void MeterFilter::ResetMeter ( )

Resets the meter.

ResetMeter() reinitializes the meter by setting counters to 0 and removing previous skip ranges.

◆ IsolatedInitialize()

void MeterFilter::IsolatedInitialize ( const NameValuePairs parameters)
inlinevirtual

Initialize or reinitialize this object, without signal propagation.

Parameters
parametersa set of NameValuePairs to initialize this object
Exceptions
NotImplemented

IsolatedInitialize() is used to initialize or reinitialize an object using a variable number of arbitrarily typed arguments. The function avoids the need for multiple constructors providing all possible combintations of configurable parameters.

IsolatedInitialize() does not call Initialize() on attached transformations. If initialization should be propagated, then use the Initialize() function.

If a derived class does not override IsolatedInitialize(), then the base class throws NotImplemented.

Reimplemented from BufferedTransformation.

Definition at line 266 of file filters.h.

◆ GetCurrentMessageBytes()

lword MeterFilter::GetCurrentMessageBytes ( ) const
inline

Number of bytes in the current message.

Returns
the number of bytes in the current message

Definition at line 271 of file filters.h.

◆ GetTotalBytes()

lword MeterFilter::GetTotalBytes ( ) const
inline

Number of bytes processed by the filter.

Returns
the number of bytes processed by the filter

Definition at line 275 of file filters.h.

◆ GetCurrentSeriesMessages()

unsigned int MeterFilter::GetCurrentSeriesMessages ( ) const
inline

Message number in the series.

Returns
the message number in the series

Definition at line 279 of file filters.h.

◆ GetTotalMessages()

unsigned int MeterFilter::GetTotalMessages ( ) const
inline

Number of messages in the message series.

Returns
the number of messages in the message series

Definition at line 283 of file filters.h.

◆ GetTotalMessageSeries()

unsigned int MeterFilter::GetTotalMessageSeries ( ) const
inline

Number of messages processed by the filter.

Returns
the number of messages processed by the filter

Definition at line 287 of file filters.h.

◆ CreatePutSpace()

byte * MeterFilter::CreatePutSpace ( size_t &  size)
inlinevirtual

Request space which can be written into by the caller.

Parameters
sizethe requested size of the buffer
Returns
byte pointer to the space to input data

The purpose of this method is to help avoid extra memory allocations.

size is an IN and OUT parameter and used as a hint. When the call is made, size is the requested size of the buffer. When the call returns, size is the size of the array returned to the caller.

The base class implementation sets size to 0 and returns NULL.

Note
Some objects, like ArraySink, cannot create a space because its fixed. In the case of an ArraySink, the pointer to the array is returned and the size is remaining size.

Reimplemented from BufferedTransformation.

Definition at line 290 of file filters.h.

◆ Put2()

size_t MeterFilter::Put2 ( const byte inString,
size_t  length,
int  messageEnd,
bool  blocking 
)
virtual

Input multiple bytes for processing.

Parameters
inStringthe byte buffer to process
lengththe size of the string, in bytes
messageEndmeans how many filters to signal MessageEnd() to, including this one
blockingspecifies whether the object should block when processing input
Returns
the number of bytes that remain to be processed (i.e., bytes not processed). 0 indicates all bytes were processed.

Derived classes must implement Put2().

Implements BufferedTransformation.

◆ PutModifiable2()

size_t MeterFilter::PutModifiable2 ( byte inString,
size_t  length,
int  messageEnd,
bool  blocking 
)
virtual

Input multiple bytes that may be modified by callee.

Parameters
inStringthe byte buffer to process.
lengththe size of the string, in bytes.
messageEndmeans how many filters to signal MessageEnd() to, including this one.
blockingspecifies whether the object should block when processing input.
Returns
the number of bytes that remain to be processed (i.e., bytes not processed). 0 indicates all bytes were processed.

Internally, PutModifiable2() calls Put2().

Reimplemented from BufferedTransformation.

◆ IsolatedMessageSeriesEnd()

bool MeterFilter::IsolatedMessageSeriesEnd ( bool  blocking)
virtual

Marks the end of a series of messages, without signal propagation.

Parameters
blockingspecifies whether the object should block when completing the processing on the current series of messages
Returns
true if the message was successful, false otherwise

Reimplemented from BufferedTransformation.


The documentation for this class was generated from the following file: