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<!--$Id: dbc_count.html,v 1.1.1.1 2003/11/20 22:14:25 toshok Exp $-->
<!--Copyright 1997-2002 by Sleepycat Software, Inc.-->
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<html>
<head>
<title>Berkeley DB: DBcursor-&gt;c_count</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
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<table width="100%"><tr valign=top>
<td>
<h1>DBcursor-&gt;c_count</h1>
</td>
<td align=right>
<a href="../api_c/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../images/ref.gif" alt="Ref"></a>
</td></tr></table>
<hr size=1 noshade>
<tt>
<h3><pre>
#include &lt;db.h&gt;
<p>
int
DBcursor-&gt;c_count(DBC *cursor, db_recno_t *countp, u_int32_t flags);
</pre></h3>
<h1>Description</h1>
<p>The DBcursor-&gt;c_count method returns a count of the number of duplicate data
items for the key to which the
cursor refers, into the memory location to which <b>countp</b> refers.
If the underlying database does not support duplicate data items, the
call will still succeed and a count of 1 will be returned.
<p>The <b>flags</b> parameter is currently unused, and must be set to 0.
<p>
If the <b>cursor</b> argument is not yet initialized, the DBcursor-&gt;c_count method will return EINVAL.
Otherwise, the DBcursor-&gt;c_count method returns a non-zero error value on failure and 0 on success.
<h1>Errors</h1>
<p>The DBcursor-&gt;c_count method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
If a catastrophic error has occurred, the DBcursor-&gt;c_count method may fail and
return <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>,
in which case all subsequent Berkeley DB calls will fail in the same way.
<h1>Class</h1>
<a href="../api_c/dbc_class.html">DBC</a>
<h1>See Also</h1>
<a href="../api_c/dbc_list.html">Database Cursors and Related Methods</a>
</tt>
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