r k &lt; 1, where 1 denotes dst_t max, otherwise s = 1 (literal).</span></div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;        dst_t <span class="keyword">const</span> dst_max = channel_traits&lt;dst_t&gt;::max_value();</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;        dst_t <span class="keyword">const</span> s_div   = dst_max - k;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;        <span cla