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<div class="textblock"><p>Section: <a class="el" href="sec_external.html">FreeMat External Interface</a> </p>
<h1><a class="anchor" id="Usage"></a>
Usage</h1>
<p>The <code>ctyperead</code> function is a convenience function for reading a C structure from a file. This is generally a very bad idea, as direct writing of C structures to files is notoriously unportable. Consider yourself warned. The syntax for this function is </p>
<pre class="fragment"> a = ctyperead(fid,'typename')
</pre><p> where <code>'typename'</code> is a string containing the name of the C structure as defined using <code>ctypedefine</code>, and <code>fid</code> is the file handle returned by the <code>fopen</code> command. Note that this form will read a single structure from the file. If you want to read multiple structures into an array, use the following form </p>
<pre class="fragment"> a = ctyperead(fid,'typename',count)
</pre><p> Note that the way this function works is by using <code>ctypesize</code> to compute the size of the structure, reading that many bytes from the file, and then calling <code>ctypethaw</code> on the resulting buffer. A consequence of this behavior is that the byte-endian corrective behavior of FreeMat does not work. </p>
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