131 lines
4.1 KiB
HTML
131 lines
4.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>strrchr</title>
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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<basefont size="3"> <a name="strrchr"></a> <a name="tag_03_737"></a><!-- strrchr -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_03_737_01"></a>NAME</h4>
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<blockquote>strrchr - string scanning operation</blockquote>
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<h4><a name="tag_03_737_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/string.h.html">string.h</a>><br>
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<br>
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char *strrchr(const char *</tt><i>s</i><tt>, int</tt> <i>c</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_737_03"></a>DESCRIPTION</h4>
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<blockquote>
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<div class="box"><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]"
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border="0"> The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the
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requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to
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the ISO C standard. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></div>
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<p>The <i>strrchr</i>() function shall locate the last occurrence of <i>c</i> (converted to a <b>char</b>) in the string pointed to
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by <i>s</i>. The terminating null byte is considered to be part of the string.</p>
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</blockquote>
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<h4><a name="tag_03_737_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, <i>strrchr</i>() shall return a pointer to the byte or a null pointer if <i>c</i> does not occur in
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the string.</p>
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</blockquote>
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<h4><a name="tag_03_737_05"></a>ERRORS</h4>
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<blockquote>
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<p>No errors are defined.</p>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_03_737_06"></a>EXAMPLES</h4>
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<blockquote>
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<h5><a name="tag_03_737_06_01"></a>Finding the Base Name of a File</h5>
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<p>The following example uses <i>strrchr</i>() to get a pointer to the base name of a file. The <i>strrchr</i>() function searches
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backwards through the name of the file to find the last <tt>'/'</tt> character in <i>name</i>. This pointer (plus one) will point
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to the base name of the file.</p>
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<pre>
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<tt>#include <string.h>
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...
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const char *name;
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char *basename;
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...
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basename = strrchr(name, '/') + 1;
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...
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</tt>
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</pre>
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</blockquote>
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<h4><a name="tag_03_737_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_737_08"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_737_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_737_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="strchr.html"><i>strchr</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/string.h.html"><i><string.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_737_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 1. Derived from Issue 1 of the SVID.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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POSIX ® is a registered Trademark of The IEEE.<br>
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