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<title>Issue 583: div() for unsigned integral types</title>
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<p><em>This page is a snapshot from the LWG issues list, see the <a href="lwg-active.html">Library Active Issues List</a> for more information and the meaning of <a href="lwg-active.html#NAD">NAD</a> status.</em></p>
<h3 id="583"><a href="lwg-closed.html#583">583</a>. <code>div()</code> for unsigned integral types</h3>
<p><b>Section:</b> 29.7 <a href="https://wg21.link/c.math">[c.math]</a> <b>Status:</b> <a href="lwg-active.html#NAD">NAD</a>
 <b>Submitter:</b> Beman Dawes <b>Opened:</b> 2006-06-15 <b>Last modified:</b> 2016-01-28</p>
<p><b>Priority: </b>Not Prioritized
</p>
<p><b>View all other</b> <a href="lwg-index.html#c.math">issues</a> in [c.math].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#NAD">NAD</a> status.</p>
<p><b>Discussion:</b></p>
<p>
There is no <code>div()</code> function for unsigned integer types.
</p>
<p>
There are several possible resolutions.  The simplest one is noted below.  Other
possibilities include a templated solution.
</p>


<p id="res-583"><b>Proposed resolution:</b></p>
<p>
Add to 26.7 [lib.c.math] paragraph 8:
</p>

<blockquote><pre>
struct udiv_t div(unsigned, unsigned);
struct uldiv_t div(unsigned long, unsigned long);
struct ulldiv_t div(unsigned long long, unsigned long long);
</pre></blockquote>



<p><b>Rationale:</b></p><p>
Toronto:  C99 does not have these unsigned versions because
the signed version exist just to define the implementation-defined behavior
of signed integer division.  Unsigned integer division has no implementation-defined
behavior and thus does not need this treatment.
</p>




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