# FBB::IOStream(3bobcat)

## std::istream and std::ostream
(libbobcat-dev_6.02.02)

## 2005-2022

## NAME

FBB::IOStream - Combines std::istream and std::ostream features

## SYNOPSIS

#include <bobcat/iostream>
Linking option: -lbobcat

## DESCRIPTION

This class combines the features of the std::istream and std::ostream classes. The std::istream and std::ostream may be physically different streams. FBB:IOStream objects may, e.g., be associated with streams wrapped around pipes (see, e.g., FBB::IfdStream and FBB::OFdStream), to construct bi-directional pipes.

## NAMESPACE

FBB
All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB.

## INHERITS FROM

FBB::IOBuf (private inheritance),
std::istream,
std::ostream

## CONSTRUCTORS

- IOStream():
  The default constructor constructs an empty FBB::IOStream objects. It should not be used before its open member (see below) was called.
- IOStream(std::istream &in, std::ostream &out):
  This constructor associates the IOStream object with a std::istream and a std::ostream. All output operations will be passed on to the std::ostream, all input operations to the std::istream. The streams passed to IOStream should outlive the IOStream object. This constructor performs the actions of the default constructor and then calls the IOStream::open member

Copy and move constructors (and assignment operators) are not available.

## MEMBER FUNCTIONS

All members of std::istream and std::ostream are available, as FBB::IOStream inherits from these classes. Furthermore, when switching between std::istream and std::ostream operations, no intermediate seekg() or seekp() operation will normally be required, since the base classes will normally be associated with physically different streams.

- void open(std::istream &in, std::ostream &out):
  This member (re)associates the IOStream object with a std::istream and a std::ostream. All output operations will be passed on to the std::ostream, all input operations to the std::istream. The streams passed to IOStream() should outlive the IOStream object. If this member is called for an IOStream object already associated with an std::ostream object, the already associated std::ostream object is flushed before setting up the new association.
- void clear():
  This member clears the error states of the associated std::istream and std::ostream objects.

## EXAMPLE

See the example provided with process(3bobcat).

## FILES

bobcat/iostream - defines the class interface

## SEE ALSO

bobcat(7), ifdstream(3bobcat), iobuf(3bobcat), ofdstream(3bobcat), process(3bobcat)

## BUGS

None Reported.

## BOBCAT PROJECT FILES

- https://fbb-git.gitlab.io/bobcat/: gitlab project page;
- bobcat_6.02.02-x.dsc: detached signature;
- bobcat_6.02.02-x.tar.gz: source archive;
- bobcat_6.02.02-x_i386.changes: change log;
- libbobcat1_6.02.02-x_*.deb: debian package containing the libraries;
- libbobcat1-dev_6.02.02-x_*.deb: debian package containing the libraries, headers and manual pages;

## BOBCAT

Bobcat is an acronym of `Brokken's Own Base Classes And Templates'.

## COPYRIGHT

This is free software, distributed under the terms of the GNU General Public License (GPL).

## AUTHOR

Frank B. Brokken (f.b.brokken@rug.nl).