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<a class="el" href="dir_897b6a2d7bab147dd1db58381aad3984.html">src</a> » <a class="el" href="dir_832905b1f7f5feaf61a306b40c0ac817.html">sys</a> » <a class="el" href="dir_d9dcf62a8e8b4cc91cbf2445d76a799b.html">lib</a></div>
<h1>memset.c</h1><a href="memset_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*****************************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright (c) 2002 The UbixOS Project</span>
<a name="l00003"></a>00003 <span class="comment"> All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment">Redistribution and use in source and binary forms, with or without modification, are</span>
<a name="l00006"></a>00006 <span class="comment">permitted provided that the following conditions are met:</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment">Redistributions of source code must retain the above copyright notice, this list of</span>
<a name="l00009"></a>00009 <span class="comment">conditions, the following disclaimer and the list of authors. Redistributions in binary</span>
<a name="l00010"></a>00010 <span class="comment">form must reproduce the above copyright notice, this list of conditions, the following</span>
<a name="l00011"></a>00011 <span class="comment">disclaimer and the list of authors in the documentation and/or other materials provided</span>
<a name="l00012"></a>00012 <span class="comment">with the distribution. Neither the name of the UbixOS Project nor the names of its</span>
<a name="l00013"></a>00013 <span class="comment">contributors may be used to endorse or promote products derived from this software</span>
<a name="l00014"></a>00014 <span class="comment">without specific prior written permission.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment">THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY</span>
<a name="l00017"></a>00017 <span class="comment">EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span>
<a name="l00018"></a>00018 <span class="comment">MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL</span>
<a name="l00019"></a>00019 <span class="comment">THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00020"></a>00020 <span class="comment">SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span>
<a name="l00021"></a>00021 <span class="comment">OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span>
<a name="l00022"></a>00022 <span class="comment">HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR</span>
<a name="l00023"></a>00023 <span class="comment">TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00024"></a>00024 <span class="comment">SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment"> $Id: memset_8c-source.html 88 2016-01-12 00:11:29Z reddawg $</span>
<a name="l00027"></a>00027 <span class="comment"></span>
<a name="l00028"></a>00028 <span class="comment">*****************************************************************************************/</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="preprocessor">#include <<a class="code" href="string_8h.html">string.h</a>></span>
<a name="l00031"></a>00031
<a name="l00032"></a><a class="code" href="memset_8c.html#01c6b59ca21f041b23efbb9845cc4e32">00032</a> <span class="preprocessor">#define wsize sizeof(uInt)</span>
<a name="l00033"></a><a class="code" href="memset_8c.html#b5deaef115ff5ca6ef1457d923d8331a">00033</a> <span class="preprocessor"></span><span class="preprocessor">#define wmask (wsize - 1)</span>
<a name="l00034"></a><a class="code" href="memset_8c.html#6a203659ae1d198f05feb3f9f987013d">00034</a> <span class="preprocessor"></span><span class="preprocessor">#define VAL c0</span>
<a name="l00035"></a><a class="code" href="memset_8c.html#62799d9c2c8c93ff3336ea492d4522d6">00035</a> <span class="preprocessor"></span><span class="preprocessor">#define WIDEVAL c</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span>
<a name="l00037"></a><a class="code" href="memset_8c.html#c468a71c435082595297037f1183e8bf">00037</a> <span class="keywordtype">void</span> *<a class="code" href="lib_2string_8h.html#ce4b911463887af5e748326323e99a23">memset</a>(<span class="keywordtype">void</span> *dst0, <span class="keywordtype">int</span> c0, <a class="code" href="types_8h.html#7619b847aeded8a6d14cbfa212b2cdfb">size_t</a> length) {
<a name="l00038"></a>00038 <a class="code" href="types_8h.html#7619b847aeded8a6d14cbfa212b2cdfb">size_t</a> t;
<a name="l00039"></a>00039 <a class="code" href="types_8h.html#87d141052bcd5ec8a80812a565c70369">uInt</a> c;
<a name="l00040"></a>00040 <a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> *dst;
<a name="l00041"></a>00041
<a name="l00042"></a>00042 dst = dst0;
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="keywordflow">if</span> (length < 3 * <a class="code" href="bcopy_8c.html#01c6b59ca21f041b23efbb9845cc4e32">wsize</a>) {
<a name="l00045"></a>00045 <span class="keywordflow">while</span> (length != 0) {
<a name="l00046"></a>00046 *dst++ = <a class="code" href="memset_8c.html#6a203659ae1d198f05feb3f9f987013d">VAL</a>;
<a name="l00047"></a>00047 --length;
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049 <span class="keywordflow">return</span>(dst0);
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keywordflow">if</span> ((c = (<a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a>)c0) != 0) { <span class="comment">/* Fill the word. */</span>
<a name="l00053"></a>00053 c = (c << 8) | c; <span class="comment">/* u_int is 16 bits. */</span>
<a name="l00054"></a>00054 c = (c << 16) | c; <span class="comment">/* u_int is 32 bits. */</span>
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="comment">/* Align destination by filling in bytes. */</span>
<a name="l00058"></a>00058 <span class="keywordflow">if</span> ((t = (<span class="keywordtype">long</span>)dst & <a class="code" href="bcopy_8c.html#b5deaef115ff5ca6ef1457d923d8331a">wmask</a>) != 0) {
<a name="l00059"></a>00059 t = <a class="code" href="bcopy_8c.html#01c6b59ca21f041b23efbb9845cc4e32">wsize</a> - t;
<a name="l00060"></a>00060 length -= t;
<a name="l00061"></a>00061 <span class="keywordflow">do</span> {
<a name="l00062"></a>00062 *dst++ = <a class="code" href="memset_8c.html#6a203659ae1d198f05feb3f9f987013d">VAL</a>;
<a name="l00063"></a>00063 } <span class="keywordflow">while</span> (--t != 0);
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="comment">/* Fill words. Length was >= 2*words so we know t >= 1 here. */</span>
<a name="l00067"></a>00067 t = length / <a class="code" href="bcopy_8c.html#01c6b59ca21f041b23efbb9845cc4e32">wsize</a>;
<a name="l00068"></a>00068 <span class="keywordflow">do</span> {
<a name="l00069"></a>00069 *(<a class="code" href="types_8h.html#c319c165d52643e43249fe003e18bdf3">u_int</a> *)dst = <a class="code" href="memset_8c.html#62799d9c2c8c93ff3336ea492d4522d6">WIDEVAL</a>;
<a name="l00070"></a>00070 dst += <a class="code" href="bcopy_8c.html#01c6b59ca21f041b23efbb9845cc4e32">wsize</a>;
<a name="l00071"></a>00071 } <span class="keywordflow">while</span> (--t != 0);
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">/* Mop up trailing bytes, if any. */</span>
<a name="l00074"></a>00074 t = length & wmask;
<a name="l00075"></a>00075 <span class="keywordflow">if</span> (t != 0)
<a name="l00076"></a>00076 <span class="keywordflow">do</span> {
<a name="l00077"></a>00077 *dst++ = <a class="code" href="memset_8c.html#6a203659ae1d198f05feb3f9f987013d">VAL</a>;
<a name="l00078"></a>00078 } <span class="keywordflow">while</span> (--t != 0);
<a name="l00079"></a>00079 <span class="keywordflow">return</span>(dst0);
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="comment">/***</span>
<a name="l00084"></a>00084 <span class="comment"> $Log: memset_8c-source.html,v $
<a name="l00084"></a>00084 <span class="comment"> Revision 1.7 2006/12/15 17:47:06 reddawg
<a name="l00084"></a>00084 <span class="comment"> Updates
<a name="l00084"></a>00084 <span class="comment"></span>
<a name="l00085"></a>00085 <span class="comment"> Revision 1.1.1.1 2006/06/01 12:46:16 reddawg</span>
<a name="l00086"></a>00086 <span class="comment"> ubix2</span>
<a name="l00087"></a>00087 <span class="comment"></span>
<a name="l00088"></a>00088 <span class="comment"> Revision 1.2 2005/10/12 00:13:37 reddawg</span>
<a name="l00089"></a>00089 <span class="comment"> Removed</span>
<a name="l00090"></a>00090 <span class="comment"></span>
<a name="l00091"></a>00091 <span class="comment"> Revision 1.1.1.1 2005/09/26 17:24:12 reddawg</span>
<a name="l00092"></a>00092 <span class="comment"> no message</span>
<a name="l00093"></a>00093 <span class="comment"></span>
<a name="l00094"></a>00094 <span class="comment"> Revision 1.1 2004/07/28 16:20:10 reddawg</span>
<a name="l00095"></a>00095 <span class="comment"> forgot this file</span>
<a name="l00096"></a>00096 <span class="comment"></span>
<a name="l00097"></a>00097 <span class="comment"> END</span>
<a name="l00098"></a>00098 <span class="comment"> ***/</span>
<a name="l00099"></a>00099
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Fri Dec 15 11:18:55 2006 for UbixOS V2 by
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