t</var>) is used.
<p class="Pp">If the file supports seek, the source can be used to open a zip
    archive from.</p>
<p class="Pp">The file is opened and read when the data from the source is used,
    usually by <code class="Fn">zip_close</code>() or
    <code class="Fn">zip_open_from_source</code>().</p>
</section>
<section class="Sh">
<h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN
  VALUES</a></h1>
Upon successful completion, the created source is returned. Otherwise