M_UNDERFLOW</code> respectively.
       </p></dd><dt id="ECPG-INFORMIX-FUNCTIONS-DECSUB"><span class="term"><code class="function">decsub</code></span> <a href="#ECPG-INFORMIX-FUNCTIONS-DECSUB" class="id_link">#</a></dt><dd><p>
        Subtract one decimal value from another.
</p><pre class="synopsis">
int decsub(decimal *n1, decimal *n2, decimal *result);
</pre><p>
        The function receives pointers to the variables that are the first
        (<code class="literal">n1</code>) and the second (<code clas