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<title>FBB::OFdStreambuf</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
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<h1>FBB::OFdStreambuf</h1>
<h2>libbobcat1-dev_2.20.01-x.tar.gz</h2>
<h2>2005-2011</h2>
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<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
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<title>FBB::OFdStreambuf(3bobcat)</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
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<h1>FBB::OFdStreambuf(3bobcat)</h1>
<h2>libbobcat1-dev_2.20.01-x.tar.gz File Descriptor Output Stream Buffer</h2>
<h2>2005-2011</h2>
<p>
<h2>NAME</h2>FBB::OFdStreambuf - Output stream buffer initialized by a file descriptor
<p>
<h2>SYNOPSIS</h2>
<strong>#include <bobcat/ofdstreambuf></strong><br>
Linking option: <em>-lbobcat</em>
<p>
<h2>DESCRIPTION</h2>
<strong>FBB::OFdStreambuf</strong> objects may be used as a <strong>std::streambuf</strong> of
<em>std::ostream</em> objects to allow insertions into a file descriptor.
<p>
File descriptors are not defined within the context of <strong>C++</strong>,
but they can be used on operating systems that support the concept. Realize
that using file descriptors introduces operating system dependencies.
<p>
<h2>NAMESPACE</h2>
<strong>FBB</strong><br>
All constructors, members, operators and manipulators, mentioned in this
man-page, are defined in the namespace <strong>FBB</strong>.
<p>
<h2>INHERITS FROM</h2>
<strong>std::streambuf</strong>
<p>
<h2>ENUMERATION</h2>
The public enumeration <strong>Mode</strong> defined in the class <strong>FBB::OFdStreamBuf</strong>
has the following values:
<ul>
<li> <strong>CLOSE_FD</strong>, indicating that the file descriptor used by the object
must be closed;
<li> <strong>KEEP_FD</strong> (the default) indicating that the file descriptor used by
the object must not be closed.
</ul>
<p>
<h2>CONSTRUCTORS</h2>
<ul>
<li> <strong>OFdStreambuf()</strong>:<br>
This constructor initializes the streambuf, without associating it to
a file descriptor, and without using buffering. The member <strong>open()</strong> can be
used to associate the object later on with a file descriptor and optionally a
buffer size. When the object is destroyed or if the mode-less overloaded
version of the <strong>open</strong> member is called, the file descriptor will be closed.
<p>
<li> <strong>OFdStreambuf(Mode mode)</strong>:<br>
This constructor initializes the streambuf, without associating it to
a file descriptor, and without using buffering. The member <strong>open()</strong> can be
used to associate the object later on with a file descriptor and optionally a
buffer size. When the object is destroyed or if the mode-less
overloaded version of the <strong>open</strong> member is called, the <strong>Mode</strong> argument
determines whether the file descriptor will be closed or will remain open.
<p>
<li> <strong>OFdStreambuf(int fd, size_t n = 1)</strong>:<br>
This constructor initializes the streambuf, associating it to file
descriptor <em>fd</em>, and an optional unget buffer size (by default having size
1). When <strong>open</strong> is called subsequently, or if the object is destroyed
the provided file descriptor will be closed.
<p>
<li> <strong>OFdStreambuf(int fd, size_t n = 1)</strong>:<br>
This constructor initializes the streambuf, associating it to file
descriptor <em>fd</em>, and an optional unget buffer size (by default having size
1). When the object is destroyed or if the mode-less overloaded version of
the <strong>open</strong> member is called, the file descriptor will be closed.
<p>
<li> <strong>OFdStreambuf(int fd, Mode mode, size_t n = 1)</strong>:<br>
This constructor initializes the streambuf, associating it to file
descriptor <em>fd</em>, and an optional unget buffer size (by default having size
1). When the object is destroyed or if the mode-less overloaded version of
the <strong>open</strong> member is called, the <strong>Mode</strong> argument determines whether the
file descriptor will be closed or will remain open.
</ul>
There are no copy or move constructors.
<p>
<h2>MEMBER FUNCTIONS</h2>
All members of <strong>std::streambuf</strong> are
available, as <strong>FBB::OFdStreambuf</strong> inherits from this class. Some of the
<strong>std::streambuf</strong>'s member are overridden by <strong>FBB::OFdStreambuf</strong>, see
below.
<ul>
<li> <strong>void close()</strong>:<br>
The file descriptor used by the <em>OFdStreambuf</em> is closed,
irrespective of the <em>Mode</em> that was specified when the <em>OFdStreambuf</em>
object was constructed. Following <em>close</em> the <em>OFdStreambuf</em> object can
no longer be used until one of its <em>open</em> members has been called.
<li> <strong>int fd() const</strong>:<br>
The file descriptor used by the <em>OFdStreambuf</em> object is returned.
If the <em>OFdStreambuf</em> is not associated with a file descriptor -1 is
returned.
<li> <strong>void open(int xfd, size_t n = 1)</strong>:<br>
The streambuf is (re)initialized, using file descriptor <em>fd</em>, and an
optional unget buffer size (by default having size 1). When called repeatedly,
the <strong>Mode</strong> specification used whem the object was constructed determines
whether the file descriptor will be closed or will remain open.
<li> <strong>void open(int xfd, Mode mode, size_t n = 1)</strong>:<br>
The streambuf is (re)initialized, using file descriptor <em>fd</em>, a file
descriptor closing parameter and an optional unget buffer size (by default
having size 1). Depending on the <strong>Mode</strong> argument the object's currently used
file descriptor will be closed or will remain open when the <em>IFdStreambuf</em>
object is destroyed.
</ul>
The overloaded assignment operator is not available.
<p>
<h2>PROTECTED MEMBER FUNCTION</h2>
<p>
The member listed in this section implements the tasks of the comparably
named virtual function in the class's private interface. This separates the
redefinable interface from the user-interface. The class <strong>OFdStreambuf</strong>
can, in accordance with Liskov's Substitution Principle, be used as a
<em>std:streambuf</em>; but it also offers a facility for classes deriving from
<strong>OFdStreambuf</strong>. This facility is listed here.
<ul>
<li> <strong>int pSync()</strong>:<br>
The contents of the <strong>OFdStreambuf</strong>'s internal buffer flushed.
</ul>
<p>
<h2>EXAMPLE</h2>
To do
<p>
<h2>FILES</h2>
<em>bobcat/ofdstreambuf</em> - defines the class interface
<p>
<h2>SEE ALSO</h2>
<strong>bobcat</strong>(7), <strong>ifdstreambuf</strong>(3bobcat), <strong>ofdstream</strong>(3bobcat),
<strong>std::streambuf</strong>
<p>
<h2>BUGS</h2>
None reported
<p>
<h2>DISTRIBUTION FILES</h2>
<ul>
<li> <em>bobcat_2.20.01-x.dsc</em>: detached signature;
<li> <em>bobcat_2.20.01-x.tar.gz</em>: source archive;
<li> <em>bobcat_2.20.01-x_i386.changes</em>: change log;
<li> <em>libbobcat1_2.20.01-x_*.deb</em>: debian package holding the
libraries;
<li> <em>libbobcat1-dev_2.20.01-x_*.deb</em>: debian package holding the
libraries, headers and manual pages;
<li> <em>http://sourceforge.net/projects/bobcat</em>: public archive location;
</ul>
<p>
<h2>BOBCAT</h2>
Bobcat is an acronym of `Brokken's Own Base Classes And Templates'.
<p>
<h2>COPYRIGHT</h2>
This is free software, distributed under the terms of the
GNU General Public License (GPL).
<p>
<h2>AUTHOR</h2>
Frank B. Brokken (<strong>f.b.brokken@rug.nl</strong>).
<p>
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