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<html>
<head>
<title>snprintf</title>
<link rel="stylesheet" type="text/css" media="all" href="../man.css">
</head>
<body bgcolor=#ffffff>
<h2 align=center>snprintf</h2>
<h4 align=center>OS/161 Reference Manual</h4>
<h3>Name</h3>
<p>
snprintf - print formatted text to string
</p>
<h3>Library</h3>
<p>
Standard C Library (libc, -lc)
</p>
<h3>Synopsis</h3>
<p>
<tt>#include &lt;unistd.h&gt;</tt><br>
<br>
<tt>int</tt><br>
<tt>snprintf(char *</tt><em>buf</em><tt>, size_t </tt><em>buflen</em><tt>,
const char *</tt><em>format</em><tt>, ...);</tt><br>
<br>
<tt>int</tt><br>
<tt>vsnprintf(char *</tt><em>buf</em><tt>, size_t </tt><em>buflen</em><tt>,
const char *</tt><em>format</em><tt>, va_list);</tt><br>
</p>
<h3>Description</h3>
<p>
<tt>snprintf</tt> performs <A HREF=printf.html>printf</A>-style
formatting on the string <em>format</em> and subsequent arguments. The
resulting string is placed in <em>buf</em>, which is a memory area at
least <em>buflen</em> bytes long. A null terminator is always added to
<em>buf</em>; the space for this is presumed to be counted in
<em>buflen</em>.
</p>
<p>
<tt>vsnprintf</tt> is the same as <tt>snprintf</tt>, except that the
subsequent arguments are presumed to have already been collected using
the <A HREF=stdarg.html>stdarg</A> facility.
</p>
<h3>Return Values</h3>
<p>
<tt>snprintf</tt> and <tt>vsnprintf</tt> return the number of
characters printed.
</p>
</body>
</html>