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<html>
<head>
<title>EAGLE Help: is...()</title>
</head>
<body bgcolor=white>
<font face=Helvetica,Arial>
<hr>
<i>EAGLE Help</i>
<h1><center>is...()</center></h1>
<hr>
<dl>
<dt>
<b>Function</b>
<dd>
Check whether a character falls into a given category.
<p>
<dt>
<b>Syntax</b>
<dd>
<tt>int isalnum(char c);</tt><br>
<tt>int isalpha(char c);</tt><br>
<tt>int iscntrl(char c);</tt><br>
<tt>int isdigit(char c);</tt><br>
<tt>int isgraph(char c);</tt><br>
<tt>int islower(char c);</tt><br>
<tt>int isprint(char c);</tt><br>
<tt>int ispunct(char c);</tt><br>
<tt>int isspace(char c);</tt><br>
<tt>int isupper(char c);</tt><br>
<tt>int isxdigit(char c);</tt>
<p>
<dt>
<b>Returns</b>
<dd>
The <tt>is...</tt> functions return nonzero if the given character falls
into the category, zero otherwise.
<p>
</dl>
<b>Character categories</b>
<p>
<table>
<tr><td valign=top><font face=Helvetica,Arial><tt>isalnum</tt> </font></td><td valign=top><font face=Helvetica,Arial>letters (<tt>A</tt> to <tt>Z</tt> or <tt>a</tt> to <tt>z</tt>) or digits (<tt>0</tt> to <tt>9</tt>)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>isalpha </tt> </font></td><td valign=top><font face=Helvetica,Arial>letters (<tt>A</tt> to <tt>Z</tt> or <tt>a</tt> to <tt>z</tt>)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>iscntrl </tt> </font></td><td valign=top><font face=Helvetica,Arial>delete characters or ordinary control characters (<tt>0x7F</tt> or <tt>0x00</tt> to <tt>0x1F</tt>)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>isdigit </tt> </font></td><td valign=top><font face=Helvetica,Arial>digits (<tt>0</tt> to <tt>9</tt>)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>isgraph </tt> </font></td><td valign=top><font face=Helvetica,Arial>printing characters (except space)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>islower </tt> </font></td><td valign=top><font face=Helvetica,Arial>lowercase letters (<tt>a</tt> to <tt>z</tt>)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>isprint </tt> </font></td><td valign=top><font face=Helvetica,Arial>printing characters (<tt>0x20</tt> to <tt>0x7E</tt>)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>ispunct </tt> </font></td><td valign=top><font face=Helvetica,Arial>punctuation characters (<tt>iscntrl</tt> or <tt>isspace</tt>)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>isspace </tt> </font></td><td valign=top><font face=Helvetica,Arial>space, tab, carriage return, new line, vertical tab, or formfeed (<tt>0x09</tt> to <tt>0x0D</tt>, <tt>0x20</tt>)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>isupper </tt> </font></td><td valign=top><font face=Helvetica,Arial>uppercase letters (<tt>A</tt> to <tt>Z</tt>)</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>isxdigit</tt> </font></td><td valign=top><font face=Helvetica,Arial>hex digits (<tt>0</tt> to <tt>9</tt>, <tt>A</tt> to <tt>F</tt>, <tt>a</tt> to <tt>f</tt>)</font></td></tr>
</table>
<p>
<b>Example</b>
<pre>
char c = 'A';
if (isxdigit(c))
printf("%c is hex\n", c);
else
printf("%c is not hex\n", c);
</pre>
<hr>
<table width=100% cellspacing=0 border=0><tr><td align=left><font face=Helvetica,Arial>
<a href=index.htm>Index</a>
</font></td><td align=right><font face=Helvetica,Arial size=-1>
<i>Copyright © 2005 CadSoft Computer GmbH</i>
</font></td></tr></table>
<hr>
</font>
</body>
</html>
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