133 lines
4.0 KiB
HTML
133 lines
4.0 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>bcmp</title>
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</head>
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<body bgcolor="white">
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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<basefont size="3"> <a name="bcmp"></a> <a name="tag_03_37"></a><!-- bcmp -->
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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_37_01"></a>NAME</h4>
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<blockquote>bcmp - memory operations (<b>LEGACY</b>)</blockquote>
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<h4><a name="tag_03_37_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<div class="box"><code><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt=
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"[Option Start]" border="0"> #include <<a href="../basedefs/strings.h.html">strings.h</a>><br>
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<br>
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int bcmp(const void *</tt><i>s1</i><tt>, const void *</tt><i>s2</i><tt>, size_t</tt> <i>n</i><tt>); <img src=
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"../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div>
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<tt><br>
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</tt></blockquote>
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<h4><a name="tag_03_37_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>bcmp</i>() function shall compare the first <i>n</i> bytes of the area pointed to by <i>s1</i> with the area pointed to
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by <i>s2</i>.</p>
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</blockquote>
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<h4><a name="tag_03_37_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>The <i>bcmp</i>() function shall return 0 if <i>s1</i> and <i>s2</i> are identical; otherwise, it shall return non-zero. Both
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areas are assumed to be <i>n</i> bytes long. If the value of <i>n</i> is 0, <i>bcmp</i>() shall return 0.</p>
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</blockquote>
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<h4><a name="tag_03_37_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_37_06"></a>EXAMPLES</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_37_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>The <a href="../functions/memcmp.html"><i>memcmp</i>()</a> function is preferred over this function.</p>
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<p>For maximum portability, it is recommended to replace the function call to <i>bcmp</i>() as follows:</p>
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<pre>
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<tt>#define bcmp(b1,b2,len) memcmp((b1), (b2), (size_t)(len))
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</tt>
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</pre>
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</blockquote>
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<h4><a name="tag_03_37_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_37_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>This function may be withdrawn in a future version.</p>
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</blockquote>
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<h4><a name="tag_03_37_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="memcmp.html"><i>memcmp</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/strings.h.html"><i><strings.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_37_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 4, Version 2.</p>
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</blockquote>
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<h4><a name="tag_03_37_12"></a>Issue 5</h4>
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<blockquote>
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<p>Moved from X/OPEN UNIX extension to BASE.</p>
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</blockquote>
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<h4><a name="tag_03_37_13"></a>Issue 6</h4>
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<blockquote>
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<p>This function is marked LEGACY.</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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