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<html><head>
<title>FBB::Hostent</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1>FBB::Hostent</h1>
<h2>libbobcat-dev_3.19.01-x.tar.gz</h2>
<h2>2005-2013</h2>

<html><head>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1></h1>

<html><head>
<title>FBB::Hostent(3bobcat)</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1>FBB::Hostent(3bobcat)</h1>
<h2>libbobcat-dev_3.19.01-x.tar.gz struct hostent wrapper</h2>
<h2>2005-2013</h2>


<p>
<h2>NAME</h2>FBB::Hostent - Wrapper around a <strong>struct hostent</strong>
<p>
<h2>SYNOPSIS</h2>
    <strong>#include &lt;bobcat/hostent&gt;</strong><br>
    Linking option: <em>-lbobcat</em> 
<p>
<h2>DESCRIPTION</h2>
    <strong>@CLASS</strong> objects are wrappers around <strong>hostent</strong> structs which may be
used by other objects. A <strong>struct hostent</strong> is defined as follows:
        <pre>

    struct hostent 
    {
        char    *h_name;        // official name of host 
        char    **h_aliases;    // alias list 
        int     h_addrtype;     // host address type (always AF_INET)
        int     h_length;       // length of address 
        char    **h_addr_list;  // list of addresses 
    }
        
</pre>

<p>
The <em>address</em> fields are binary values of the addresses, each address
requiring <em>h_length</em> bytes, the last address being equal to 0. The
<strong>@CLASS</strong> objects offer a <strong>C++</strong>-like interface to this struct.
<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>
    -
<p>
<h2>CONSTRUCTORS</h2>
    <ul>
    <li> <strong>Hostent(hostent const *hostentPtr)</strong>:<br> 
        This constructor initializes an <strong>@CLASS</strong> object from an existing
<strong>hostent</strong> struct. Functions like <strong>gethostbyname</strong>(3) and
<strong>gethostbyaddress</strong>(3) return pointers to <strong>hostent</strong> structs.
    </ul>
<p>
The default, copy and move constructors are available.
<p>
<h2>MEMBER FUNCTIONS</h2>
<p>
<ul>
    <li> <strong>size_t addressLength() const</strong>:<br>
        This member returns the length of the binary addresses in bytes.
    <li> <strong>size_t addressType() const</strong>:<br>
        This member returns the type of the address. Currently this is always
<strong>AF_INET</strong>.
    <li> <strong>char const *alias(size_t index) const</strong>:<br>
        This member returns alias `<em>index</em>' of the host. The first alias has
<em>index 0</em>. If alias `<em>index</em>' does not exist, 0 is returned.
    <li> <strong>char const * const *beginAlias() const</strong>:<br>
        This member returns an iterator to the first alias. The hostname
itself is not included in the list of aliases.
    <li> <strong>char const *binaryAddress(size_t index) const</strong>:<br>
        This member returns the binary address `<em>index</em>' of the host.  The
first address has <em>index 0</em>. If address `<em>index</em>' does not exist, 0 is
returned. The pointer to the binary address points to a series of
<strong>addressLength()</strong> bytes. Note that the returned address is in <em>network
byte order</em>. It can be converted to host byte order by the functions described
in <strong>byteorder</strong>(3).
    <li> <strong>std::string dottedDecimalAddress(size_t index) const</strong>:<br>
        This member returns address `<em>index</em>' as a dotted decimal address in
a string. The first address has <em>index 0</em>. If address `<em>index</em>' does not
exist, an empty string is returned.
    <li> <strong>char const * const *endAlias() const</strong>:<br>
        This member returns an iterator pointing beyond the last alias.
    <li> <strong>char const *hostname() const</strong>:<br>
        This member returns the standard (first) name of the host.
    <li> <strong>size_t nAddresses() const</strong>:<br>
        This member returns the number of addresses that are available. When
requesting a particular address, the requested index should be less than
the value returned by this member.
    <li> <strong>size_t nAliases() const</strong>:<br>
        This member returns the number of aliases that are available. When
requesting a particular alias, the requested index should be less than the
value returned by this member.
    <li> <strong>void swap(Hostent &amp;other)</strong>:<br>
        The current <em>Hostent</em> object's contents are swapped with the other
    object's contents.
    </ul>
<p>
The overloaded assignment operator and the move-aware overloaded
assignment operators are available.
<p>
<h2>EXAMPLE</h2>
        <pre>

    #include &lt;iostream&gt;
    #include &lt;algorithm&gt;
    #include &lt;iterator&gt;
    #include &lt;bobcat/hostent&gt;
    
    using namespace std;
    using namespace FBB;
    
    int main(int argc, char **argv)
    {
        Hostent he(gethostbyname("localhost"));

        cout &lt;&lt; "The local hostname = " &lt;&lt; he.hostname() &lt;&lt; endl;

        cout &lt;&lt; "All aliases: " &lt;&lt; endl;
        copy(he.beginAlias(), he.endAlias(), 
                    ostream_iterator&lt;char const *&gt;(cout, "\n"));

        cout &lt;&lt; "Addresses:\n";
        for (size_t idx = 0; idx &lt; he.nAddresses(); idx++)
            cout &lt;&lt; he.dottedDecimalAddress(idx) &lt;&lt; endl;

        return 0;
    }
        
</pre>

<p>
<h2>FILES</h2>
    <em>bobcat/hostent</em> - defines the class interface
<p>
<h2>SEE ALSO</h2>
    <strong>bobcat</strong>(7)
<p>
<h2>BUGS</h2>
    None Reported.
<p>

<h2>DISTRIBUTION FILES</h2>
    <ul>
    <li> <em>bobcat_3.19.01-x.dsc</em>: detached signature;
    <li> <em>bobcat_3.19.01-x.tar.gz</em>: source archive;
    <li> <em>bobcat_3.19.01-x_i386.changes</em>: change log;
    <li> <em>libbobcat1_3.19.01-x_*.deb</em>: debian package holding the
            libraries;
    <li> <em>libbobcat1-dev_3.19.01-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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