class AbstractIOHandlerImpl

This is an abstract class IOHandler that defines the methods for a descriptor such as determining if the input/output descriptor is open or closed and read and write methods for the descriptor

Inheritance:

Public Methods

virtual	~AbstractIOHandlerImpl () Destroys this object
virtual int	getDescriptor () const Gets the descriptor
virtual bool	isOpen () const Determines if the descriptor is open
virtual bool	isClosed () const Determines if the descriptor is closed
virtual int	read (char* buf, int num) Read from the descriptor, a specified number of bytes into buffer
virtual int	write (const char* buf, int num) Write to the descriptor, a specified number of bytes from the buffer
virtual int	close () Closes the descriptor
virtual string	paramString () const Returns a string representation for IOHandler which is used for debugging purposes

virtual ~AbstractIOHandlerImpl()

Destroys this object

virtual int getDescriptor() const

Gets the descriptor.

Returns:

the descriptor

virtual bool isOpen() const

Determines if the descriptor is open.

Returns:

true if the descriptor is open, otherwise returns false

virtual bool isClosed() const

Determines if the descriptor is closed.

Returns:

an true if the descriptor is closed, otherwise returns false

virtual int read(char* buf, int num)

Read from the descriptor, a specified number of bytes into buffer.

Returns:

the actual number of bytes being read

Parameters:

buf - the buffer to read into
num - specified number of bytes

virtual int write(const char* buf, int num)

Write to the descriptor, a specified number of bytes from the buffer.

Returns:

the actual bytes being written

Parameters:

buf - the buffer to write from
num - specified number of bytes

virtual int close()

Closes the descriptor.

Returns:

number after being closed

virtual string paramString() const

Returns a string representation for IOHandler which is used for debugging purposes.

Returns:

debugging info

Direct child classes:

IOHandlerImpl

Author:

Srilekha Mudumbai Abdelilah Essiari

Version:

1.1 00/11/01

alphabetic index hierarchy of classes

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