Crypto++ 8.2 Free C++ class library of cryptographic schemes

Public Member Functions | List of all members
Source Class Referenceabstract

Implementation of BufferedTransformation's attachment interface. More...

Inheritance diagram for Source:

## Public Member Functions
| Source (BufferedTransformation *attachment=NULL)
| Construct a Source. More...
PIPELINE
lword | Pump (lword pumpMax=...)
| Pump data to attached transformation. More...
unsigned int | PumpMessages (unsigned int count=UINT_MAX)
| Pump messages to attached transformation. More...
void | PumpAll ()
| Pump all data to attached transformation. More...
virtual size_t | Pump2 (lword &byteCount, bool blocking=true)=0
| Pump data to attached transformation. More...
virtual size_t | PumpMessages2 (unsigned int &messageCount, bool blocking=true)=0
| Pump messages to attached transformation. More...
virtual size_t | PumpAll2 (bool blocking=true)
| Pump all data to attached transformation. More...
virtual bool | SourceExhausted () const =0
| Determines if the Source is exhausted. More...
Public Member Functions inherited from InputRejecting< Filter >
size_t | Put2 (const byte *inString, size_t length, int messageEnd, bool blocking)
| Input a byte array for processing. More...
bool | IsolatedFlush (bool hardFlush, bool blocking)
| Flushes data buffered by this object, without signal propagation. More...
bool | IsolatedMessageSeriesEnd (bool blocking)
| Marks the end of a series of messages, without signal propagation. More...
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...
bool | ChannelMessageSeriesEnd (const std::string &channel, int messageEnd, bool blocking)
| Marks the end of a series of messages on a channel. More...
Public Member Functions inherited from Filter
| Filter (BufferedTransformation *attachment=NULL)
| Construct a Filter. More...
bool | Attachable ()
| Determine if attachable. More...
BufferedTransformation * | AttachedTransformation ()
| Retrieve attached transformation. More...
const BufferedTransformation * | AttachedTransformation () 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.
BufferedTransformation & | Ref ()
| Provides a reference to this object. 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 byte * | CreatePutSpace (size_t &size)
| Request space which can be written into by the caller. 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...
virtual size_t | PutModifiable2 (byte *inString, size_t length, int messageEnd, bool blocking)
| Input multiple bytes that may be modified by callee. More...
unsigned int | GetMaxWaitObjectCount () const
| Retrieves the maximum number of waitable objects.
void | GetWaitObjects (WaitObjectContainer &container, CallStack const &callStack)
| Retrieves waitable objects. More...
virtual void | IsolatedInitialize (const NameValuePairs &parameters)
| Initialize or reinitialize this object, without signal propagation. 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 byte * | ChannelCreatePutSpace (const std::string &channel, size_t &size)
| Request space which can be written into by the caller. 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 void | SetRetrievalChannel (const std::string &channel)
| Sets the default retrieval channel. More...
virtual void | Attach (BufferedTransformation *newAttachment)
| Add newAttachment to the end of attachment chain. 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 Clonable * | Clone () const
| Copies this object. More...
Public Member Functions inherited from Waitable
bool | Wait (unsigned long milliseconds, CallStack const &callStack)
| Wait on this object. More...

## Detailed Description

Implementation of BufferedTransformation's attachment interface.

Source is a cornerstone of the Pipeline trinitiy. Data flows from Sources, through Filters, and then terminates in Sinks. The difference between a Source and Filter is a Source pumps data, while a Filter does not. The difference between a Filter and a Sink is a Filter allows an attached transformation, while a Sink does not.

See the discussion of BufferedTransformation in cryptlib.h for more details.

See also
  Store and SourceTemplate

Since
  Crypto++ 1.0

Definition at line 1344 of file filters.h.

## Constructor & Destructor Documentation

## ◆ Source()

Source::Source | ( | BufferedTransformation * | attachment = `NULL` | ) |
| inline

Construct a Source.

Parameters

  attachment | an optional attached transformation

Definition at line 1351 of file filters.h.

## Member Function Documentation

## ◆ Pump()

lword Source::Pump | ( | lword | pumpMax = `...` | ) |
| inline

Pump data to attached transformation.

Parameters

  pumpMax | the maximum number of bytes to pump

Returns
  the number of bytes that remain to be processed (i.e., bytes not processed). 0 indicates all bytes were processed.

Internally, Pump() calls Pump2().

Note
  pumpMax is a `lword`, which is a 64-bit value that typically uses `LWORD_MAX`. The default argument is `SIZE_MAX`, and it can be 32-bits or 64-bits.

See also
  Pump2, PumpAll, AnyRetrievable, MaxRetrievable

Definition at line 1366 of file filters.h.

## ◆ PumpMessages()

unsigned int Source::PumpMessages | ( | unsigned int | count = `UINT_MAX` | ) |
| inline

Pump messages to attached transformation.

Parameters

  count | the maximum number of messages to pump

Returns
  TODO

Internally, PumpMessages() calls PumpMessages2().

Definition at line 1373 of file filters.h.

## ◆ PumpAll()

void Source::PumpAll | ( |  | ) |
| inline

Pump all data to attached transformation.

Pumps all data to the attached transformation and signal the end of the current message. To avoid the MessageEnd() signal call Pump(LWORD_MAX) or Pump2(LWORD_MAX, bool).

Internally, PumpAll() calls PumpAll2(), which calls PumpMessages().

See also
  Pump, Pump2, AnyRetrievable, MaxRetrievable

Definition at line 1382 of file filters.h.

## ◆ Pump2()

virtual size_t Source::Pump2 | ( | lword & | byteCount,
|  | bool | blocking = `true`
| ) |  |
| pure virtual

Pump data to attached transformation.

Parameters

  byteCount | the maximum number of bytes to pump
  blocking | specifies 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.

byteCount is an IN and OUT parameter. When the call is made, byteCount is the requested size of the pump. When the call returns, byteCount is the number of bytes that were pumped.

See also
  Pump, PumpAll, AnyRetrievable, MaxRetrievable

Implemented in SourceTemplate< T >, SourceTemplate< FileStore >, SourceTemplate< RandomNumberStore >, and SourceTemplate< StringStore >.

## ◆ PumpMessages2()

virtual size_t Source::PumpMessages2 | ( | unsigned int & | messageCount,
|  | bool | blocking = `true`
| ) |  |
| pure virtual

Pump messages to attached transformation.

Parameters

  messageCount | the maximum number of messages to pump
  blocking | specifies whether the object should block when processing input

messageCount is an IN and OUT parameter.

Implemented in SourceTemplate< T >, SourceTemplate< FileStore >, SourceTemplate< RandomNumberStore >, and SourceTemplate< StringStore >.

## ◆ PumpAll2()

size_t Source::PumpAll2 | ( | bool | blocking = `true` | ) |
| virtual

Pump all data to attached transformation.

Parameters

  blocking | specifies 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.

See also
  Pump, Pump2, AnyRetrievable, MaxRetrievable

Reimplemented in SourceTemplate< T >, SourceTemplate< FileStore >, SourceTemplate< RandomNumberStore >, and SourceTemplate< StringStore >.

Definition at line 1163 of file filters.cpp.

## ◆ SourceExhausted()

virtual bool Source::SourceExhausted | ( |  | ) | const
| pure virtual

Determines if the Source is exhausted.

Returns
  true if the source has been exhausted

Implemented in SourceTemplate< T >, SourceTemplate< FileStore >, SourceTemplate< RandomNumberStore >, and SourceTemplate< StringStore >.

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

- filters.h
- filters.cpp