visus
/
toolchain-gcc-arm-embedded

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>siscanf (The Red Hat newlib C Library)</title>

<meta name="description" content="siscanf (The Red Hat newlib C Library)">
<meta name="keywords" content="siscanf (The Red Hat newlib C Library)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<link href="index.html#Top" rel="start" title="Top">
<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Stdio.html#Stdio" rel="up" title="Stdio">
<link href="sprintf.html#sprintf" rel="next" title="sprintf">
<link href="siprintf.html#siprintf" rel="prev" title="siprintf">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smalllisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en">
<a name="siscanf"></a>
<div class="header">
<p>
Next: <a href="sprintf.html#sprintf" accesskey="n" rel="next">sprintf</a>, Previous: <a href="siprintf.html#siprintf" accesskey="p" rel="prev">siprintf</a>, Up: <a href="Stdio.html#Stdio" accesskey="u" rel="up">Stdio</a> &nbsp; [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="siscanf_002c-fiscanf_002c-iscanf_002d_002d_002dscan-and-format-non_002dfloating-input"></a>
<h3 class="section">4.60 <code>siscanf</code>, <code>fiscanf</code>, <code>iscanf</code>&mdash;scan and format non-floating input</h3>
<a name="index-iscanf"></a>
<a name="index-_005fiscanf_005fr"></a>
<a name="index-fiscanf"></a>
<a name="index-_005ffiscanf_005fr"></a>
<a name="index-siscanf"></a>
<a name="index-_005fsiscanf_005fr"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;stdio.h&gt;

int iscanf(const char *<var>format</var>, ...);
int fiscanf(FILE *<var>fd</var>, const char *<var>format</var>, ...);
int siscanf(const char *<var>str</var>, const char *<var>format</var>, ...);

int _iscanf_r(struct _reent *<var>ptr</var>, const char *<var>format</var>, ...);
int _fiscanf_r(struct _reent *<var>ptr</var>, FILE *<var>fd</var>, 
    const char *<var>format</var>, ...);
int _siscanf_r(struct _reent *<var>ptr</var>, const char *<var>str</var>,
    const char *<var>format</var>, ...);

</pre></div>
<p><strong>Description</strong><br>
<code>iscanf</code>, <code>fiscanf</code>, and <code>siscanf</code> are the same as
<code>scanf</code>, <code>fscanf</code>, and <code>sscanf</code> respectively, only that
they restrict the available formats to non-floating-point
format specifiers.
</p>
<p>The routines <code>_iscanf_r</code>, <code>_fiscanf_r</code>, and <code>_siscanf_r</code> are reentrant
versions of <code>iscanf</code>, <code>fiscanf</code>, and <code>siscanf</code> that take an additional
first argument pointing to a reentrancy structure.
</p>
<br>
<p><strong>Returns</strong><br>
<code>iscanf</code> returns the number of input fields successfully
scanned, converted and stored; the return value does
not include scanned fields which were not stored.
</p>
<p>If <code>iscanf</code> attempts to read at end-of-file, the return
value is <code>EOF</code>.
</p>
<p>If no fields were stored, the return value is <code>0</code>.
</p>
<br>
<p><strong>Portability</strong><br>
<code>iscanf</code>, <code>fiscanf</code>, and <code>siscanf</code> are newlib extensions.
</p>
<p>Supporting OS subroutines required: <code>close</code>, <code>fstat</code>, <code>isatty</code>,
<code>lseek</code>, <code>read</code>, <code>sbrk</code>, <code>write</code>.
</p>
<br>


</body>
</html>