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<html>
<head><title>
HDF5/H5I API Specification
</title></head>
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<h1>H5I: Identifier Interface</h1>
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<h2>Identifier API Functions</h2>
This function provides a tool for working with object identifiers.
<p>
<table border=0>
<tr><td valign=top>
<ul>
<li><a href="#Identify-GetType">H5Iget_type</a>
</ul>
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<ul>
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<hr>
<dl>
<dt><strong>Name:</strong> <a name="Identify-GetType">H5Iget_type</a>
<dt><strong>Signature:</strong>
<dd><em>H5I_type_t</em> <code>H5Iget_type</code>(<em>hid_t</em> <code>obj_id</code>)
<dt><strong>Purpose:</strong>
<dd>Retrieves the type of an object.
<dt><strong>Description:</strong>
<dd><code>H5Iget_type</code> retrieves the type of the object
identified by <code>obj_id</code>.
<p>
Valid types returned by the function are
<table>
<tr><td width=200><code> H5I_FILE</code>
</td><td>File</td></tr>
<tr><td><code> H5I_GROUP</code>
</td><td>Group</td></tr>
<tr><td><code> H5I_DATATYPE</code>
</td><td>Datatype</td></tr>
<tr><td><code> H5I_DATASPACE</code>
</td><td>Dataspace</td></tr>
<tr><td><code> H5I_DATASET</code>
</td><td>Dataset</td></tr>
<tr><td><code> H5I_ATTR</code>
</td><td>Attribute</td></tr>
</table>
If no valid type can be determined or the identifier
submitted is invalid, the function returns
<table>
<tr><td width=200><code> H5I_BADID</code>
</td><td>Invalid identifier</td></tr>
</table>
<p>
This function is of particular value in determining the
type of object closing function (<code>H5Dclose</code>,
<code>H5Gclose</code>, etc.) to call after a call to
<code>H5Rdereference</code>.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>obj_id</code>
<dd>IN: Object identifier whose type is to be determined.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns the object type if successful;
otherwise <code>H5I_BADID</code>.
</dl>
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<address>
<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
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Last modified: 30 October 1998
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