📄 strcasecmp.html

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>strcasecmp</title></head><body bgcolor=white><center><font size=2>The Single UNIX &reg; Specification, Version 2<br>Copyright &copy; 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_009_012">&nbsp;</a>NAME</h4><blockquote>strcasecmp, strncasecmp - case-insensitive string comparisons</blockquote><h4><a name = "tag_000_009_013">&nbsp;</a>SYNOPSIS</h4><blockquote><pre><code>#include &lt;<a href="strings.h.html">strings.h</a>&gt;int strcasecmp(const char *<i>s1</i>, const char *<i>s2</i>);int strncasecmp(const char *<i>s1</i>, const char *<i>s2</i>, size_t <i>n</i>);</code></pre></blockquote><h4><a name = "tag_000_009_014">&nbsp;</a>DESCRIPTION</h4><blockquote>The<i>strcasecmp()</i>function compares, while ignoring differences in case,the string pointed to by <i>s1</i> to the string pointed to by <i>s2</i>.The<i><a href="strncasecmp.html">strncasecmp()</a></i>function compares, while ignoring differences in case, not more than <i>n</i>bytes from the string pointed to by <i>s1</i> to the string pointed to by<i>s2</i>.<p>In the POSIX locale,<i>strcasecmp()</i>and<i><a href="strncasecmp.html">strncasecmp()</a></i>do upper to lower conversions, then a byte comparison.  The results areunspecified in other locales.</blockquote><h4><a name = "tag_000_009_015">&nbsp;</a>RETURN VALUE</h4><blockquote>Upon completion,<i>strcasecmp()</i>returns an integer greater than, equal to or less than 0, if thestring pointed to by <i>s1</i> is, ignoring case, greater than, equal to orless than the string pointed to by <i>s2</i> respectively.<p>Upon successful completion,<i><a href="strncasecmp.html">strncasecmp()</a></i>returns an integer greater than, equal to or less than 0, if thepossibly null-terminated array pointed to by <i>s1</i> is, ignoring case,greater than, equal to or less than the possibly null-terminated array pointedto by <i>s2</i> respectively.</blockquote><h4><a name = "tag_000_009_016">&nbsp;</a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_009_017">&nbsp;</a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_009_018">&nbsp;</a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_009_019">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_009_020">&nbsp;</a>SEE ALSO</h4><blockquote><i><a href="strings.h.html">&lt;strings.h&gt;</a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX &reg; is a registered Trademark of The Open Group.<br>Copyright &copy; 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>
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