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Next: <a href="bsearch.html#bsearch" accesskey="n" rel="next">bsearch</a>, Previous: <a href="atoi.html#atoi" accesskey="p" rel="prev">atoi</a>, Up: <a href="Stdlib.html#Stdlib" accesskey="u" rel="up">Stdlib</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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<a name="atoll_002d_002d_002dconvert-a-string-to-a-long-long-integer"></a>
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<h3 class="section">2.9 <code>atoll</code>—convert a string to a long long integer</h3>
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<a name="index-atoll"></a>
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<a name="index-_005fatoll_005fr"></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 <stdlib.h>
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long long atoll(const char *<var>str</var>);
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long long _atoll_r(struct _reent *<var>ptr</var>, const char *<var>str</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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The function <code>atoll</code> converts the initial portion of the string
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pointed to by <code>*<var>str</var></code> to a type <code>long long</code>. A call to
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atoll(str) in this implementation is equivalent to
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strtoll(str, (char **)NULL, 10) including behavior on error.
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</p>
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<p>The alternate function <code>_atoll_r</code> is a reentrant version. The
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extra argument <var>reent</var> is a pointer to a reentrancy structure.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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The converted value.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>atoll</code> is ISO 9899 (C99) and POSIX 1003.1-2001 compatable.
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</p>
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<p>No supporting OS subroutines are required.
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