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<html><head><title>XLISP close</title>
<link rel="stylesheet" type="text/css" href="reference.css">
</head>
<body>
<a href="../start.htm">Nyquist / XLISP 2.0</a> -
<a href="../manual/contents.htm">Contents</a> |
<a href="../tutorials/tutorials.htm">Tutorials</a> |
<a href="../examples/examples.htm">Examples</a> |
<a href="reference-index.htm">Reference</a>
<hr>
<h1>close</h1>
<hr>
<p><table cellpadding="0" cellspacing="0" style="margin-left:10px"><tbody>
<tr valign="top">
<td><nobr>Type:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>function (subr)</nobr></td>
</tr>
<tr valign="top">
<td><nobr>Source:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>xlfio.c</nobr></td>
</tr>
</tbody></table></p>
<h2>Syntax</h2>
<dl>
<dt>(close <i>file-ptr</i>)</dt>
<dd><i>file-ptr</i> - a file pointer expression<br>
returns - <a href="nil.htm">NIL</a></dd>
</dl>
<h2>Description</h2>
<p>The 'close' function closes the file specified through 'file-ptr'. If
the file close was successful, then a
<a href="nil.htm">NIL</a> is returned as the result. For the
file close to be successful, the 'file-ptr' has to point to a valid file.
If the file close was not successful, an error is generated:</p>
<pre class="example">
<font color="#AA0000">error: file not open</font>
</pre>
<h2>Examples</h2>
<pre class="example">
(close (open 'f :direction :output)) <font color="#008844">; returns NIL</font>
(setq myfile (open 'mine :direction :output)) <font color="#008844">; create MYFILE</font>
(print "hi" myfile) <font color="#008844">; returns "hi"</font>
(close myfile) <font color="#008844">; returns NIL</font>
<font color="#008844">; file contains <hi> <NEWLINE></font>
(setq myfile (open 'mine :direction :input)) <font color="#008844">; open MYFILE for input</font>
(read myfile) <font color="#008844">; returns "hi"</font>
(close myfile) <font color="#008844">; returns NIL</font>
</pre>
<p><b>Common Lisp:</b> Common LISP has an XLISP compatible 'close' function.
Common LISP does support an ':abort' keyword, which is not supported in
XLISP.</p>
<p>See the
<a href="../manual/xlisp-man-029.htm#close">close</a>
function in the <nobr>XLISP 2.0</nobr> manual.</p>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
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