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<h2>
<a name="1207150"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">interrupt_test_number</font>
</h2><hr>
<p>
<a name="1207151"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Test whether an interrupt number is pending</font>
</p>
<h3>
<a name="1207152"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Synopsis</font>
</h3>
<a name="1207153"> </a><font size=2 face=Courier><strong>#include <interrup.h><br></strong></font>
<a name="1207154"> </a><font size=2 face=Courier><strong>int interrupt_test_number( int <font size=2 face=Courier><strong><em>Number </em></strong></font>);<br></strong></font>
<h3>
<a name="1207155"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Arguments</font>
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<p>
<a name="1232262"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><b><font size=2 face=Courier><strong>int </strong></font><font size=2 face=Courier><strong><em>Number</em></strong></font></b></font>
<br>
<dl><dl> <dl>
<dt> <a name="1232264"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Interrupt number</font>
</dl>
</dl></dl>
<h3>
<a name="1207158"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Results</font>
</h3>
<p>
<a name="1207159"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Returns <font size=2 face=Courier><strong>1</strong></font> if interrupt number <font size=2 face=Courier><strong><em>Number</em></strong></font> is pending, <font size=2 face=Courier><strong>0</strong></font> if it is not, <font size=2 face=Courier><strong>-1</strong></font> if an error occurs.</font>
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<h3>
<a name="1207160"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Errors</font>
</h3>
<p>
<a name="1207161"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Returns <font size=2 face=Courier><strong>-1</strong></font> if the interrupt number is illegal.</font>
</p>
<h3>
<a name="1207162"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
</h3>
<p>
<a name="1207163"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Tests the interrupt level controllers <span class=Signal>Pending</span> register to see if interrupt number <font size=2 face=Courier><strong><em>Number</em></strong></font> is pending.</font>
</p>
<p>
<a name="1207164"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><em>Note: If <font size=2 face=Courier><strong><em>Number</em></strong></font> is not valid and returns the error code the function evaluates to true if used in a conditional context (see below).</em></font>
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<h3>
<a name="1207165"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Example</font>
</h3>
<a name="1207166"> </a><font size=2 face=Courier><strong><font size=2 face=Courier><em>/* do not do this */</em></font><br></strong></font>
<a name="1207167"> </a><font size=2 face=Courier><strong>if (interrupt_test_number(n)) {<br></strong></font>
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