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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<title>timer.cpp</title>
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<pre><tt><i><font color="#9A1900">// NOTE: in order to compile this system on Linux (and most Unix</font></i>
<i><font color="#9A1900">// systems) you will have to include the -lrt flag to your compiler.</font></i>
<b><font color="#000080">#include</font></b> <font color="#FF0000"><sstream></font>
<b><font color="#000080">#include</font></b> <font color="#FF0000"><math.h></font>
<b><font color="#000080">#include</font></b> <font color="#FF0000"><cstring></font>
<b><font color="#000080">#include</font></b> <font color="#FF0000">"timer.h"</font>
timer<font color="#990000">::</font><b><font color="#000000">timer</font></b><font color="#990000">(</font>timer <font color="#990000">&</font> t<font color="#990000">)</font> <font color="#990000">:</font> <b><font color="#000000">running</font></b><font color="#990000">(</font>t<font color="#990000">.</font>running<font color="#990000">)</font> <font color="#FF0000">{</font>
<b><font color="#000000">memcpy</font></b><font color="#990000">(&</font>startVar<font color="#990000">,</font> <font color="#990000">&(</font>t<font color="#990000">.</font>startVar<font color="#990000">),</font> <b><font color="#0000FF">sizeof</font></b> <font color="#990000">(</font>timeval<font color="#990000">));</font>
<b><font color="#000000">memcpy</font></b><font color="#990000">(&</font>stopVar<font color="#990000">,</font> <font color="#990000">&(</font>t<font color="#990000">.</font>stopVar<font color="#990000">),</font> <b><font color="#0000FF">sizeof</font></b> <font color="#990000">(</font>timeval<font color="#990000">));</font>
<font color="#FF0000">}</font>
<font color="#009900">int</font> timer<font color="#990000">::</font><b><font color="#000000">start</font></b><font color="#990000">()</font> <font color="#FF0000">{</font>
<b><font color="#0000FF">if</font></b> <font color="#990000">(!</font>running<font color="#990000">)</font> <font color="#FF0000">{</font>
running <font color="#990000">=</font> <b><font color="#0000FF">true</font></b><font color="#990000">;</font>
<b><font color="#000000">gettimeofday</font></b><font color="#990000">(&</font>startVar<font color="#990000">,</font>NULL<font color="#990000">);</font>
<b><font color="#0000FF">return</font></b> <font color="#993399">0</font><font color="#990000">;</font>
<font color="#FF0000">}</font>
<b><font color="#0000FF">return</font></b> <font color="#993399">1</font><font color="#990000">;</font>
<font color="#FF0000">}</font>
<font color="#009900">int</font> timer<font color="#990000">::</font><b><font color="#000000">stop</font></b><font color="#990000">()</font> <font color="#FF0000">{</font>
<b><font color="#0000FF">if</font></b> <font color="#990000">(</font>running<font color="#990000">)</font> <font color="#FF0000">{</font>
running <font color="#990000">=</font> <font color="#993399">0</font><font color="#990000">;</font>
<b><font color="#000000">gettimeofday</font></b><font color="#990000">(&</font>stopVar<font color="#990000">,</font>NULL<font color="#990000">);</font>
<b><font color="#0000FF">return</font></b> <font color="#993399">0</font><font color="#990000">;</font>
<font color="#FF0000">}</font>
<b><font color="#0000FF">return</font></b> <font color="#993399">1</font><font color="#990000">;</font>
<font color="#FF0000">}</font>
ostream <font color="#990000">&</font> timer<font color="#990000">::</font><b><font color="#000000">print</font></b><font color="#990000">(</font>ostream <font color="#990000">&</font> out<font color="#990000">)</font> <font color="#FF0000">{</font>
<b><font color="#0000FF">return</font></b> <font color="#990000">(</font>out <font color="#990000"><<</font> <b><font color="#000000">toString</font></b><font color="#990000">());</font>
<font color="#FF0000">}</font>
<font color="#009900">double</font> timer<font color="#990000">::</font><b><font color="#000000">getTime</font></b><font color="#990000">()</font> <font color="#FF0000">{</font>
<font color="#008080">time_t</font> sec <font color="#990000">=</font> stopVar<font color="#990000">.</font>tv_sec <font color="#990000">-</font> startVar<font color="#990000">.</font>tv_sec<font color="#990000">;</font>
<font color="#009900">long</font> usec <font color="#990000">=</font> stopVar<font color="#990000">.</font>tv_usec <font color="#990000">-</font> startVar<font color="#990000">.</font>tv_usec<font color="#990000">;</font>
<b><font color="#0000FF">return</font></b> sec <font color="#990000">+</font> usec<font color="#990000">/</font><font color="#993399">1000000.0</font><font color="#990000">;</font>
<font color="#FF0000">}</font>
<font color="#008080">string</font> timer<font color="#990000">::</font><b><font color="#000000">toString</font></b><font color="#990000">()</font> <font color="#FF0000">{</font>
<font color="#008080">ostringstream</font> out<font color="#990000">;</font>
<font color="#009900">int</font> ms<font color="#990000">,</font> s<font color="#990000">,</font> m<font color="#990000">,</font> h<font color="#990000">;</font>
<font color="#009900">int</font> totalmsec<font color="#990000">;</font>
<b><font color="#0000FF">if</font></b> <font color="#990000">(</font>running<font color="#990000">)</font>
out <font color="#990000"><<</font> <font color="#FF0000">"Timer still running</font><font color="#CC33CC">\n</font><font color="#FF0000">"</font><font color="#990000">;</font>
<b><font color="#0000FF">else</font></b> <font color="#FF0000">{</font>
<font color="#008080">time_t</font> sec <font color="#990000">=</font> stopVar<font color="#990000">.</font>tv_sec <font color="#990000">-</font> startVar<font color="#990000">.</font>tv_sec<font color="#990000">;</font>
<font color="#009900">long</font> usec <font color="#990000">=</font> stopVar<font color="#990000">.</font>tv_usec <font color="#990000">-</font> startVar<font color="#990000">.</font>tv_usec<font color="#990000">;</font>
<b><font color="#0000FF">if</font></b> <font color="#990000">(</font> usec <font color="#990000"><</font> <font color="#993399">0</font> <font color="#990000">)</font> <font color="#FF0000">{</font>
sec<font color="#990000">--;</font>
usec <font color="#990000">+=</font> <font color="#993399">1000000</font><font color="#990000">;</font>
<font color="#FF0000">}</font>
out <font color="#990000"><<</font> sec <font color="#990000"><<</font> <font color="#FF0000">"."</font>
<font color="#990000"><<</font> <font color="#990000">((</font>usec<font color="#990000"><</font><font color="#993399">100000</font><font color="#990000">)?</font><font color="#FF0000">"0"</font><font color="#990000">:</font><font color="#FF0000">""</font><font color="#990000">)</font>
<font color="#990000"><<</font> <font color="#990000">((</font>usec<font color="#990000"><</font><font color="#993399">10000</font><font color="#990000">)?</font><font color="#FF0000">"0"</font><font color="#990000">:</font><font color="#FF0000">""</font><font color="#990000">)</font>
<font color="#990000"><<</font> <font color="#990000">((</font>usec<font color="#990000"><</font><font color="#993399">1000</font><font color="#990000">)?</font><font color="#FF0000">"0"</font><font color="#990000">:</font><font color="#FF0000">""</font><font color="#990000">)</font>
<font color="#990000"><<</font> <font color="#990000">((</font>usec<font color="#990000"><</font><font color="#993399">100</font><font color="#990000">)?</font><font color="#FF0000">"0"</font><font color="#990000">:</font><font color="#FF0000">""</font><font color="#990000">)</font>
<font color="#990000"><<</font> <font color="#990000">((</font>usec<font color="#990000"><</font><font color="#993399">10</font><font color="#990000">)?</font><font color="#FF0000">"0"</font><font color="#990000">:</font><font color="#FF0000">""</font><font color="#990000">)</font>
<font color="#990000"><<</font> usec<font color="#990000">;</font>
<font color="#FF0000">}</font>
<b><font color="#0000FF">return</font></b> out<font color="#990000">.</font><b><font color="#000000">str</font></b><font color="#990000">();</font>
<font color="#FF0000">}</font>
ostream <font color="#990000">&</font> <b><font color="#0000FF">operator</font></b><font color="#990000"><<(</font><font color="#008080">ostream</font> <font color="#990000">&</font>out<font color="#990000">,</font> <font color="#008080">timer</font> <font color="#990000">&</font>t<font color="#990000">)</font> <font color="#FF0000">{</font>
<b><font color="#0000FF">return</font></b> t<font color="#990000">.</font><b><font color="#000000">print</font></b><font color="#990000">(</font>out<font color="#990000">);</font>
<font color="#FF0000">}</font>
</tt></pre>
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