Context for command line interpreter. More...

#include <cli.h>

Inheritance diagram for PCLI::Context:

Public Member Functions
Construction
	Context (PCLI &cli)
	Construct new command line interpreter context.
virtual	~Context ()
	Destroy command line interpreter context.
Overrides from PChannel
virtual PBoolean	Write (const void *buf, PINDEX len)
	Low level write to the channel.
Operations
bool	Start ()
	Start a command line interpreter thread.
void	Stop ()
	Stop command line interpreter context.
virtual void	OnStart ()
	Call back frunction for when context is started.
virtual void	OnStop ()
	Callback for when context is stopping.
virtual bool	WritePrompt ()
	Write prompt (depending on state) to channel.
virtual bool	ReadAndProcessInput ()
	Read a character from the attached channel an process.
virtual bool	ProcessInput (int ch)
	Process a character read from the channel.
virtual bool	ProcessInput (const PString &line)
virtual void	OnCompletedLine ()
	Call back for a command line was completed and ENTER pressed.
Member access
PCLI &	GetCLI () const
	Get the CLI.
bool	IsProcessingCommand () const
	Indicate is currently processing a command.
Public Member Functions inherited from PIndirectChannel
	PIndirectChannel ()
	Create a new indirect channel without any channels to redirect to.
	~PIndirectChannel ()
	Close the indirect channel, deleting read/write channels if desired.
Comparison	Compare (const PObject &obj) const
	Determine if the two objects refer to the same indirect channel.
virtual PString	GetName () const
	Get the name of the channel.
virtual PBoolean	Close ()
	Close the channel.
virtual PBoolean	IsOpen () const
	Determine if the channel is currently open and read and write operations can be executed on it.
virtual PBoolean	Read (void *buf, PINDEX len)
	Low level read from the channel.
virtual PBoolean	Shutdown (ShutdownValue option)
	Close one or both of the data streams associated with a channel.
virtual bool	SetLocalEcho (bool localEcho)
	Set local echo mode.
virtual PChannel *	GetBaseReadChannel () const
	This function returns the eventual base channel for reading of a series of indirect channels provided by descendents of `PIndirectChannel`.
virtual PChannel *	GetBaseWriteChannel () const
	This function returns the eventual base channel for writing of a series of indirect channels provided by descendents of `PIndirectChannel`.
virtual PString	GetErrorText (ErrorGroup group=NumErrorGroups) const
	Get error message description.
PBoolean	Open (PChannel &channel)
	Set the channel for both read and write operations.
PBoolean	Open (PChannel *channel, PBoolean autoDelete=true)
	Set the channel for both read and write operations.
PBoolean	Open (PChannel readChannel, PChannel writeChannel, PBoolean autoDeleteRead=true, PBoolean autoDeleteWrite=true)
	Set the channel for both read and write operations.
PChannel *	GetReadChannel () const
	Get the channel used for read operations.
bool	SetReadChannel (PChannel *channel, bool autoDelete=true, bool closeExisting=false)
	Set the channel for read operations.
PChannel *	GetWriteChannel () const
	Get the channel used for write operations.
PBoolean	SetWriteChannel (PChannel *channel, bool autoDelete=true, bool closeExisting=false)
	Set the channel for read operations.
Public Member Functions inherited from PChannel
PBoolean	SetErrorValues (Errors errorCode, int osError, ErrorGroup group=LastGeneralError)
	Set error values to those specified.
	PChannel ()
	Create the channel.
	~PChannel ()
	Close down the channel.
virtual PINDEX	HashFunction () const
	Calculate a hash value for use in sets and dictionaries.
int	GetHandle () const
	Get the integer operating system handle for the channel.
void	SetReadTimeout (const PTimeInterval &time)
	Set the timeout for read operations.
PTimeInterval	GetReadTimeout () const
	Get the timeout for read operations.
virtual PINDEX	GetLastReadCount () const
	Get the number of bytes read by the last Read() call.
virtual int	ReadChar ()
	Read a single 8 bit byte from the channel.
PBoolean	ReadBlock (void *buf, PINDEX len)
	Read len bytes into the buffer from the channel.
PString	ReadString (PINDEX len)
	Read `len` character into a string from the channel.
virtual PBoolean	ReadAsync (void *buf, PINDEX len)
	Begin an asynchronous read from channel.
virtual void	OnReadComplete (void *buf, PINDEX len)
	User callback function for when a `ReadAsync()` call has completed or timed out.
void	SetWriteTimeout (const PTimeInterval &time)
	Set the timeout for write operations to complete.
PTimeInterval	GetWriteTimeout () const
	Get the timeout for write operations to complete.
virtual PBoolean	Write (const void buf, PINDEX len, const void mark)
	Low level write to the channel with marker.
virtual PINDEX	GetLastWriteCount () const
	Get the number of bytes written by the last Write() call.
PBoolean	WriteChar (int c)
	Write a single character to the channel.
PBoolean	WriteString (const PString &str)
	Write a string to the channel.
virtual PBoolean	WriteAsync (const void *buf, PINDEX len)
	Begin an asynchronous write from channel.
virtual void	OnWriteComplete (const void *buf, PINDEX len)
	User callback function for when a WriteAsync() call has completed or timed out.
virtual bool	FlowControl (const void *flowData)
	Flow Control information Pass data to the channel for flowControl determination.
PBoolean	SetBufferSize (PINDEX newSize)
	Set the iostream buffer size for reads and writes.
PBoolean	SendCommandString (const PString &command)
	Send a command meta-string.
void	AbortCommandString ()
	Abort a command string that is in progress.
Errors	GetErrorCode (ErrorGroup group=NumErrorGroups) const
	Get normalised error code.
int	GetErrorNumber (ErrorGroup group=NumErrorGroups) const
	Get OS errro code.
virtual PBoolean	Read (const VectorOfSlice &slices)
	Low level scattered read from the channel.
virtual PBoolean	Write (const VectorOfSlice &slices)
	Low level scattered write to the channel.
Public Member Functions inherited from PObject
virtual	~PObject ()
virtual PObject *	Clone () const
	Create a copy of the class on the heap.
virtual Comparison	CompareObjectMemoryDirect (const PObject &obj) const
	Determine the byte wise comparison of two objects.
bool	operator== (const PObject &obj) const
	Compare the two objects.
bool	operator!= (const PObject &obj) const
	Compare the two objects.
bool	operator< (const PObject &obj) const
	Compare the two objects.
bool	operator> (const PObject &obj) const
	Compare the two objects.
bool	operator<= (const PObject &obj) const
	Compare the two objects.
bool	operator>= (const PObject &obj) const
	Compare the two objects.
virtual const char *	GetClass (unsigned ancestor=0) const
	Get the current dynamic type of the object instance.
PBoolean	IsClass (const char *cls) const
virtual PBoolean	InternalIsDescendant (const char *clsName) const
	Determine if the dynamic type of the current instance is a descendent of the specified class.
virtual void	PrintOn (ostream &strm) const
	Output the contents of the object to the stream.
virtual void	ReadFrom (istream &strm)
	Input the contents of the object from the stream.

Protected Types
enum	State { e_Username, e_Password, e_CommandEntry, e_ProcessingCommand }

Protected Member Functions
	PDECLARE_NOTIFIER (PThread, Context, ThreadMain)
Protected Member Functions inherited from PIndirectChannel
virtual PBoolean	OnOpen ()
	This callback is executed when the Open() function is called with open channels.
Protected Member Functions inherited from PChannel
	PChannel (const PChannel &)
PChannel &	operator= (const PChannel &)
virtual PBoolean	ConvertOSError (int libcReturnValue, ErrorGroup group=LastGeneralError)
	Convert an operating system error into platform independent error.
int	ReadCharWithTimeout (PTimeInterval &timeout)
	Read a character with specified timeout.
PBoolean	ReceiveCommandString (int nextChar, const PString &reply, PINDEX &pos, PINDEX start)
PBoolean	PXSetIOBlock (PXBlockType type, const PTimeInterval &timeout)
int	PXClose ()
Protected Member Functions inherited from PObject
	PObject ()
	Constructor for PObject, made protected so cannot ever create one on its own.

Protected Attributes
PCLI &	m_cli
PString	m_commandLine
bool	m_ignoreNextEOL
PStringList	m_commandHistory
PThread *	m_thread
enum PCLI::Context::State	m_state
PString	m_enteredUsername
Protected Attributes inherited from PIndirectChannel
PChannel *	readChannel
	Channel for read operations.
PBoolean	readAutoDelete
	Automatically delete read channel on destruction.
PChannel *	writeChannel
	Channel for write operations.
PBoolean	writeAutoDelete
	Automatically delete write channel on destruction.
PReadWriteMutex	channelPointerMutex
	Race condition prevention on closing channel.
Protected Attributes inherited from PChannel
int	os_handle
	The operating system file handle return by standard open() function.
Errors	lastErrorCode [NumErrorGroups+1]
	The platform independant error code.
int	lastErrorNumber [NumErrorGroups+1]
	The operating system error number (eg as returned by errno).
PINDEX	lastReadCount
	Number of byte last read by the Read() function.
PINDEX	lastWriteCount
	Number of byte last written by the Write() function.
PTimeInterval	readTimeout
	Timeout for read operations.
PTimeInterval	writeTimeout
	Timeout for write operations.
PString	channelName
PMutex	px_threadMutex
PXBlockType	px_lastBlockType
PThread *	px_readThread
PThread *	px_writeThread
PMutex	px_writeMutex
PThread *	px_selectThread [3]
PMutex	px_selectMutex [3]

Additional Inherited Members
Public Types inherited from PChannel
enum	PXBlockType { PXReadBlock, PXWriteBlock, PXAcceptBlock, PXConnectBlock }
enum	ShutdownValue { ShutdownRead = 0, ShutdownWrite = 1, ShutdownReadAndWrite = 2 }
enum	Errors { NoError, NotFound, FileExists, DiskFull, AccessDenied, DeviceInUse, BadParameter, NoMemory, NotOpen, Timeout, Interrupted, BufferTooSmall, Miscellaneous, ProtocolFailure, NumNormalisedErrors }
	Normalised error codes. More...
enum	ErrorGroup { LastReadError, LastWriteError, LastGeneralError, NumErrorGroups }
	Error groups. More...
typedef std::vector< Slice >	VectorOfSlice
Static Public Member Functions inherited from PChannel
static PBoolean	ConvertOSError (int libcReturnValue, Errors &lastError, int &osError)
	Convert an operating system error into platform independent error.
static PString	GetErrorText (Errors lastError, int osError=0)
	Get error message description.
Friends inherited from PObject

Detailed Description

Context for command line interpreter.

Member Enumeration Documentation

enum PCLI::Context::State

protected

Enumerator:

e_Username
e_Password
e_CommandEntry
e_ProcessingCommand

Constructor & Destructor Documentation

PCLI::Context::Context ( PCLI & cli )

Construct new command line interpreter context.

virtual PCLI::Context::~Context ( )

virtual

Destroy command line interpreter context.

This will close and wait for threads to exit.

Member Function Documentation

PCLI& PCLI::Context::GetCLI ( ) const

inline

Get the CLI.

References m_cli.

bool PCLI::Context::IsProcessingCommand ( ) const

inline

Indicate is currently processing a command.

References e_ProcessingCommand, and m_state.

virtual void PCLI::Context::OnCompletedLine ( )

virtual

Call back for a command line was completed and ENTER pressed.

The default behaviour processes the line into a PArgList and deals with the command history and help.

Control is then passed on to PCLI::OnReceivedLine().

virtual void PCLI::Context::OnStart ( )

virtual

Call back frunction for when context is started.

This is usually called from within a background thread.

The default behaviour displays the prompt.

virtual void PCLI::Context::OnStop ( )

virtual

Callback for when context is stopping.

This is usually called from within a background thread.

The default behaviour does nothing.

PCLI::Context::PDECLARE_NOTIFIER	(	PThread	,
		Context	,
		ThreadMain
	)

protected

virtual bool PCLI::Context::ProcessInput ( int ch )

virtual

Process a character read from the channel.

Returns false if have error and processing is to cease.

virtual bool PCLI::Context::ProcessInput ( const PString & line )

virtual

virtual bool PCLI::Context::ReadAndProcessInput ( )

virtual

Read a character from the attached channel an process.

If the character was successfully read then ProcessInput() is called.

bool PCLI::Context::Start ( )

Start a command line interpreter thread.

void PCLI::Context::Stop ( )

Stop command line interpreter context.

This will close the channel and wait for threads to exit.

virtual PBoolean PCLI::Context::Write	(	const void *	buf,
		PINDEX	len
	)

virtual

Low level write to the channel.

This function will block until the requested number of characters are written or the write timeout is reached. The GetLastWriteCount() function returns the actual number of bytes written.

This translate new line character ('
') to be the text string in PCLI::m_newLine.

The GetErrorCode() function should be consulted after Write() returns false to determine what caused the failure.

Returns: true if at least len bytes were written to the channel.

Parameters

buf	Pointer to a block of memory to write.
len	Number of bytes to write.

Reimplemented from PIndirectChannel.

virtual bool PCLI::Context::WritePrompt ( )

virtual

Write prompt (depending on state) to channel.

Member Data Documentation

PCLI& PCLI::Context::m_cli

protected

Referenced by GetCLI().

PStringList PCLI::Context::m_commandHistory

protected

PString PCLI::Context::m_commandLine

protected

PString PCLI::Context::m_enteredUsername

protected

bool PCLI::Context::m_ignoreNextEOL

protected

enum PCLI::Context::State PCLI::Context::m_state

protected

Referenced by IsProcessingCommand().

PThread* PCLI::Context::m_thread

protected

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

cli.h

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation