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87 lines
3.2 KiB
HTML
87 lines
3.2 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>ffs (The Red Hat newlib C Library)</title>
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<meta name="description" content="ffs (The Red Hat newlib C Library)">
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<meta name="keywords" content="ffs (The Red Hat newlib C Library)">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Misc.html#Misc" rel="up" title="Misc">
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<link href="_005f_005fretarget_005flock_005finit.html#g_t_005f_005fretarget_005flock_005finit" rel="next" title="__retarget_lock_init">
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</head>
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<body lang="en">
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<a name="ffs"></a>
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<div class="header">
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<p>
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Next: <a href="_005f_005fretarget_005flock_005finit.html#g_t_005f_005fretarget_005flock_005finit" accesskey="n" rel="next">__retarget_lock_init</a>, Up: <a href="Misc.html#Misc" accesskey="u" rel="up">Misc</a> [<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>
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</div>
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<hr>
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<a name="ffs_002d_002d_002dfind-first-bit-set-in-a-word"></a>
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<h3 class="section">11.1 <code>ffs</code>—find first bit set in a word</h3>
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<a name="index-ffs"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <strings.h>
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int ffs(int <var>word</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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</p>
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<p><code>ffs</code> returns the first bit set in a word.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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<code>ffs</code> returns 0 if <var>c</var> is 0, 1 if <var>c</var> is odd, 2 if <var>c</var> is a multiple of
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2, etc.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>ffs</code> is not ANSI C.
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</p>
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<p>No supporting OS subroutines are required.
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</p><br>
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</body>
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