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<html><head><title>XLISP open-binary</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>open-binary</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>(open-binary <i>file</i> [:direction <i>in-out</i>])</dt>
<dd><i>file</i> - a string expression or symbol<br>
<i>in-out</i> - an optional keyword symbol that must be either ':input' or
':output'. The default is ':input'.<br>
returns - a stream</dd>
</dl>
<h2>Description</h2>
<p>The '<nobr>open-binary</nobr>' function opens the 'file' for binary input
or output. The 'file' may be a string expression or a symbol. Following the
'file', there is an optional keyword, ':direction'. The argument following
this is either ':input' or ':output' which specifies the direction of the
file. <nobr>If no</nobr> ':direction' is specified, the default is ':input'.
When 'file' is a string, you may specify a complete file location or
extensions like "/usr/local/bin/myfile.lsp" or
"A:\LISP\TIM.BAT". <nobr>If the</nobr> file open was successful,
then a file pointer of the following form is returned as the result:</p>
<pre class="example">
#<File: #99999>
</pre>
<p>If the file open was not successful, a <a href="nil.htm">NIL</a> is
returned. <nobr>For an</nobr> input file, the file has to exist, or an error
will be signaled.</p>
<h2>Examples</h2>
<pre class="example">
</pre>
<p>This will create a file named FOO-FILE, because XLISP uppercases its
symbols:</p>
<pre class="example">
(open-binary 'foo-file :direction :output)
</pre>
<p>This will create a file named 'foo-file' because UNIX doesn't
uppercase its file names:</p>
<pre class="example">
(open-binary "foo-file" :direction :output)
</pre>
<p>So, if you are having trouble with opening and accessing files, check to
make sure the file name is in the proper case.</p>
<p>See also <a href="bigendianp.htm">bigendianp</a>,
<nobr><a href="read-int.htm">read-int</a></nobr>,
<nobr><a href="write-int.htm">write-int</a></nobr>,
<nobr><a href="read-float.htm">read-float</a></nobr>,
<nobr><a href="write-float.htm">write-float</a></nobr>.</p>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
<hr>
<a href="../start.htm">Nyquist / XLISP 2.0</a> -
<a href="../manual/contents.htm">Contents</a> |
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<a href="../examples/examples.htm">Examples</a> |
<a href="reference-index.htm">Reference</a>
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