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<h1>strlcpy.c</h1> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* $OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $ */</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">/*</span>
<a name="l00004"></a>00004 <span class="comment"> * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com></span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * Permission to use, copy, modify, and distribute this software for any</span>
<a name="l00007"></a>00007 <span class="comment"> * purpose with or without fee is hereby granted, provided that the above</span>
<a name="l00008"></a>00008 <span class="comment"> * copyright notice and this permission notice appear in all copies.</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES</span>
<a name="l00011"></a>00011 <span class="comment"> * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF</span>
<a name="l00012"></a>00012 <span class="comment"> * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR</span>
<a name="l00013"></a>00013 <span class="comment"> * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES</span>
<a name="l00014"></a>00014 <span class="comment"> * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN</span>
<a name="l00015"></a>00015 <span class="comment"> * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF</span>
<a name="l00016"></a>00016 <span class="comment"> * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span>
<a name="l00017"></a>00017 <span class="comment"> */</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span><span class="preprocessor">#include "config.h"</span>
<a name="l00021"></a>00021 <span class="preprocessor">#endif</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00023"></a>00023 <span class="preprocessor">#ifndef HAVE_STRLCPY</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <sys/types.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <string.h></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include "<a class="code" href="strlcpycat_8h.html" title="prototypes of strlcpy()/strlcat() imported from OpenBSD">strlcpycat.h</a>"</span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="comment">/*</span>
<a name="l00030"></a>00030 <span class="comment"> * Copy src to string dst of size siz. At most siz-1 characters</span>
<a name="l00031"></a>00031 <span class="comment"> * will be copied. Always NUL terminates (unless siz == 0).</span>
<a name="l00032"></a>00032 <span class="comment"> * Returns strlen(src); if retval >= siz, truncation occurred.</span>
<a name="l00033"></a>00033 <span class="comment"> */</span>
<a name="l00034"></a>00034 <span class="keywordtype">size_t</span>
<a name="l00035"></a>00035 strlcpy(<span class="keywordtype">char</span> *dst, <span class="keyword">const</span> <span class="keywordtype">char</span> *src, <span class="keywordtype">size_t</span> siz)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 <span class="keywordtype">char</span> *d = dst;
<a name="l00038"></a>00038 <span class="keyword">const</span> <span class="keywordtype">char</span> *s = src;
<a name="l00039"></a>00039 <span class="keywordtype">size_t</span> n = siz;
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="comment">/* Copy as many bytes as will fit */</span>
<a name="l00042"></a>00042 <span class="keywordflow">if</span> (n != 0 && --n != 0) {
<a name="l00043"></a>00043 <span class="keywordflow">do</span> {
<a name="l00044"></a>00044 <span class="keywordflow">if</span> ((*d++ = *s++) == 0)
<a name="l00045"></a>00045 <span class="keywordflow">break</span>;
<a name="l00046"></a>00046 } <span class="keywordflow">while</span> (--n != 0);
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="comment">/* Not enough room in dst, add NUL and traverse rest of src */</span>
<a name="l00050"></a>00050 <span class="keywordflow">if</span> (n == 0) {
<a name="l00051"></a>00051 <span class="keywordflow">if</span> (siz != 0)
<a name="l00052"></a>00052 *d = <span class="charliteral">'\0'</span>; <span class="comment">/* NUL-terminate dst */</span>
<a name="l00053"></a>00053 <span class="keywordflow">while</span> (*s++)
<a name="l00054"></a>00054 ;
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="keywordflow">return</span>(s - src - 1); <span class="comment">/* count does not include NUL */</span>
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="preprocessor">#endif</span>
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