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teensy-sdfat/html/class_fat_cache.html

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  1. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

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  7. <title>SdFat: FatCache Class Reference</title>

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  23.  <tbody>

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  26.    <div id="projectname">SdFat

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  42.       <li class="current"><a href="annotated.html"><span>Classes</span></a></li>

  43.       <li><a href="files.html"><span>Files</span></a></li>

  44.       <li>

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  62.   <div id="navrow2" class="tabs2">

  63.     <ul class="tablist">

  64.       <li><a href="annotated.html"><span>Class&#160;List</span></a></li>

  65.       <li><a href="inherits.html"><span>Class&#160;Hierarchy</span></a></li>

  66.       <li><a href="functions.html"><span>Class&#160;Members</span></a></li>

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  79.         name="MSearchResults" id="MSearchResults">

  80. </iframe>

  81. </div>

  82. 

  83. </div><!-- top -->

  84. <div class="header">

  85.   <div class="summary">

  86. <a href="#pub-methods">Public Member Functions</a> &#124;

  87. <a href="#pub-static-attribs">Static Public Attributes</a> &#124;

  88. <a href="class_fat_cache-members.html">List of all members</a>  </div>

  89.   <div class="headertitle">

  90. <div class="title">FatCache Class Reference</div>  </div>

  91. </div><!--header-->

  92. <div class="contents">

  93. 

  94. <p>Block cache.  

  95.  <a href="class_fat_cache.html#details">More...</a></p>

  96. 

  97. <p><code>#include &lt;FatVolume.h&gt;</code></p>

  98. <table class="memberdecls">

  99. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>

  100. Public Member Functions</h2></td></tr>

  101. <tr class="memitem:ab3d9c4f94af61065b6d6d0892827fd8a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="unioncache__t.html">cache_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ab3d9c4f94af61065b6d6d0892827fd8a">block</a> ()</td></tr>

  102. <tr class="separator:ab3d9c4f94af61065b6d6d0892827fd8a"><td class="memSeparator" colspan="2">&#160;</td></tr>

  103. <tr class="memitem:ab4d3b0c16bb6a116c7d01afff2dcb307"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ab4d3b0c16bb6a116c7d01afff2dcb307">dirty</a> ()</td></tr>

  104. <tr class="separator:ab4d3b0c16bb6a116c7d01afff2dcb307"><td class="memSeparator" colspan="2">&#160;</td></tr>

  105. <tr class="memitem:ae1d8a2da1493b5ffca0520184daaddf1"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ae1d8a2da1493b5ffca0520184daaddf1">init</a> (<a class="el" href="class_fat_volume.html">FatVolume</a> *vol)</td></tr>

  106. <tr class="separator:ae1d8a2da1493b5ffca0520184daaddf1"><td class="memSeparator" colspan="2">&#160;</td></tr>

  107. <tr class="memitem:a70071a128d647b49b523dbb2f5f944a5"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a70071a128d647b49b523dbb2f5f944a5">invalidate</a> ()</td></tr>

  108. <tr class="separator:a70071a128d647b49b523dbb2f5f944a5"><td class="memSeparator" colspan="2">&#160;</td></tr>

  109. <tr class="memitem:a9f981b53e212f79937e5f6381b169374"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a9f981b53e212f79937e5f6381b169374">lbn</a> ()</td></tr>

  110. <tr class="separator:a9f981b53e212f79937e5f6381b169374"><td class="memSeparator" colspan="2">&#160;</td></tr>

  111. <tr class="memitem:ac2bb0b8f2ce3ab5cd86cf30b4a663cea"><td class="memItemLeft" align="right" valign="top"><a class="el" href="unioncache__t.html">cache_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ac2bb0b8f2ce3ab5cd86cf30b4a663cea">read</a> (uint32_t <a class="el" href="class_fat_cache.html#a9f981b53e212f79937e5f6381b169374">lbn</a>, uint8_t option)</td></tr>

  112. <tr class="separator:ac2bb0b8f2ce3ab5cd86cf30b4a663cea"><td class="memSeparator" colspan="2">&#160;</td></tr>

  113. <tr class="memitem:a4d76d4f46ce5994f6fc4678a7b4f8cf1"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a4d76d4f46ce5994f6fc4678a7b4f8cf1">sync</a> ()</td></tr>

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  115. </table><table class="memberdecls">

  116. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-attribs"></a>

  117. Static Public Attributes</h2></td></tr>

  118. <tr class="memitem:ae5ac564caf5c65f223a6f5c6adac0691"><td class="memItemLeft" align="right" valign="top">static uint8_t const&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ae5ac564caf5c65f223a6f5c6adac0691">CACHE_FOR_READ</a> = 0</td></tr>

  119. <tr class="separator:ae5ac564caf5c65f223a6f5c6adac0691"><td class="memSeparator" colspan="2">&#160;</td></tr>

  120. <tr class="memitem:aeb3fa32ee4120404854c282f0c0e133a"><td class="memItemLeft" align="right" valign="top">static uint8_t const&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#aeb3fa32ee4120404854c282f0c0e133a">CACHE_FOR_WRITE</a> = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a></td></tr>

  121. <tr class="separator:aeb3fa32ee4120404854c282f0c0e133a"><td class="memSeparator" colspan="2">&#160;</td></tr>

  122. <tr class="memitem:adf974f55e53ee0aaa85abb0d7d67181c"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#adf974f55e53ee0aaa85abb0d7d67181c">CACHE_OPTION_NO_READ</a> = 4</td></tr>

  123. <tr class="separator:adf974f55e53ee0aaa85abb0d7d67181c"><td class="memSeparator" colspan="2">&#160;</td></tr>

  124. <tr class="memitem:a7307dd12178856bc3e823d8738856662"><td class="memItemLeft" align="right" valign="top">static uint8_t const&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a7307dd12178856bc3e823d8738856662">CACHE_RESERVE_FOR_WRITE</a> = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> | <a class="el" href="class_fat_cache.html#adf974f55e53ee0aaa85abb0d7d67181c">CACHE_OPTION_NO_READ</a></td></tr>

  125. <tr class="separator:a7307dd12178856bc3e823d8738856662"><td class="memSeparator" colspan="2">&#160;</td></tr>

  126. <tr class="memitem:aac8c38e5c545d0f80b13d816117f626e"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> = 1</td></tr>

  127. <tr class="separator:aac8c38e5c545d0f80b13d816117f626e"><td class="memSeparator" colspan="2">&#160;</td></tr>

  128. <tr class="memitem:ab70dc4a2e387f0e9bf392044c702ae32"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ab70dc4a2e387f0e9bf392044c702ae32">CACHE_STATUS_MASK</a> = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> | <a class="el" href="class_fat_cache.html#a45236e1c0a2a098f08d3add0e4b1467a">CACHE_STATUS_MIRROR_FAT</a></td></tr>

  129. <tr class="separator:ab70dc4a2e387f0e9bf392044c702ae32"><td class="memSeparator" colspan="2">&#160;</td></tr>

  130. <tr class="memitem:a45236e1c0a2a098f08d3add0e4b1467a"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a45236e1c0a2a098f08d3add0e4b1467a">CACHE_STATUS_MIRROR_FAT</a> = 2</td></tr>

  131. <tr class="separator:a45236e1c0a2a098f08d3add0e4b1467a"><td class="memSeparator" colspan="2">&#160;</td></tr>

  132. </table>

  133. <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>

  134. <div class="textblock"><p>Block cache. </p>

  135. </div><h2 class="groupheader">Member Function Documentation</h2>

  136. <a class="anchor" id="ab3d9c4f94af61065b6d6d0892827fd8a"></a>

  137. <div class="memitem">

  138. <div class="memproto">

  139. <table class="mlabels">

  140.   <tr>

  141.   <td class="mlabels-left">

  142.       <table class="memname">

  143.         <tr>

  144.           <td class="memname"><a class="el" href="unioncache__t.html">cache_t</a>* FatCache::block </td>

  145.           <td>(</td>

  146.           <td class="paramname"></td><td>)</td>

  147.           <td></td>

  148.         </tr>

  149.       </table>

  150.   </td>

  151.   <td class="mlabels-right">

  152. <span class="mlabels"><span class="mlabel">inline</span></span>  </td>

  153.   </tr>

  154. </table>

  155. </div><div class="memdoc">

  156. <dl class="section return"><dt>Returns</dt><dd>Cache block address. </dd></dl>

  157. 

  158. </div>

  159. </div>

  160. <a class="anchor" id="ab4d3b0c16bb6a116c7d01afff2dcb307"></a>

  161. <div class="memitem">

  162. <div class="memproto">

  163. <table class="mlabels">

  164.   <tr>

  165.   <td class="mlabels-left">

  166.       <table class="memname">

  167.         <tr>

  168.           <td class="memname">void FatCache::dirty </td>

  169.           <td>(</td>

  170.           <td class="paramname"></td><td>)</td>

  171.           <td></td>

  172.         </tr>

  173.       </table>

  174.   </td>

  175.   <td class="mlabels-right">

  176. <span class="mlabels"><span class="mlabel">inline</span></span>  </td>

  177.   </tr>

  178. </table>

  179. </div><div class="memdoc">

  180. <p>Set current block dirty. </p>

  181. 

  182. </div>

  183. </div>

  184. <a class="anchor" id="ae1d8a2da1493b5ffca0520184daaddf1"></a>

  185. <div class="memitem">

  186. <div class="memproto">

  187. <table class="mlabels">

  188.   <tr>

  189.   <td class="mlabels-left">

  190.       <table class="memname">

  191.         <tr>

  192.           <td class="memname">void FatCache::init </td>

  193.           <td>(</td>

  194.           <td class="paramtype"><a class="el" href="class_fat_volume.html">FatVolume</a> *&#160;</td>

  195.           <td class="paramname"><em>vol</em></td><td>)</td>

  196.           <td></td>

  197.         </tr>

  198.       </table>

  199.   </td>

  200.   <td class="mlabels-right">

  201. <span class="mlabels"><span class="mlabel">inline</span></span>  </td>

  202.   </tr>

  203. </table>

  204. </div><div class="memdoc">

  205. <p>Initialize the cache. </p><dl class="params"><dt>Parameters</dt><dd>

  206.   <table class="params">

  207.     <tr><td class="paramdir">[in]</td><td class="paramname">vol</td><td><a class="el" href="class_fat_volume.html" title="Access FAT16 and FAT32 volumes on raw file devices. ">FatVolume</a> that owns this <a class="el" href="class_fat_cache.html" title="Block cache. ">FatCache</a>. </td></tr>

  208.   </table>

  209.   </dd>

  210. </dl>

  211. 

  212. </div>

  213. </div>

  214. <a class="anchor" id="a70071a128d647b49b523dbb2f5f944a5"></a>

  215. <div class="memitem">

  216. <div class="memproto">

  217. <table class="mlabels">

  218.   <tr>

  219.   <td class="mlabels-left">

  220.       <table class="memname">

  221.         <tr>

  222.           <td class="memname">void FatCache::invalidate </td>

  223.           <td>(</td>

  224.           <td class="paramname"></td><td>)</td>

  225.           <td></td>

  226.         </tr>

  227.       </table>

  228.   </td>

  229.   <td class="mlabels-right">

  230. <span class="mlabels"><span class="mlabel">inline</span></span>  </td>

  231.   </tr>

  232. </table>

  233. </div><div class="memdoc">

  234. <p>Invalidate current cache block. </p>

  235. 

  236. </div>

  237. </div>

  238. <a class="anchor" id="a9f981b53e212f79937e5f6381b169374"></a>

  239. <div class="memitem">

  240. <div class="memproto">

  241. <table class="mlabels">

  242.   <tr>

  243.   <td class="mlabels-left">

  244.       <table class="memname">

  245.         <tr>

  246.           <td class="memname">uint32_t FatCache::lbn </td>

  247.           <td>(</td>

  248.           <td class="paramname"></td><td>)</td>

  249.           <td></td>

  250.         </tr>

  251.       </table>

  252.   </td>

  253.   <td class="mlabels-right">

  254. <span class="mlabels"><span class="mlabel">inline</span></span>  </td>

  255.   </tr>

  256. </table>

  257. </div><div class="memdoc">

  258. <dl class="section return"><dt>Returns</dt><dd>Logical block number for cached block. </dd></dl>

  259. 

  260. </div>

  261. </div>

  262. <a class="anchor" id="ac2bb0b8f2ce3ab5cd86cf30b4a663cea"></a>

  263. <div class="memitem">

  264. <div class="memproto">

  265.       <table class="memname">

  266.         <tr>

  267.           <td class="memname"><a class="el" href="unioncache__t.html">cache_t</a> * FatCache::read </td>

  268.           <td>(</td>

  269.           <td class="paramtype">uint32_t&#160;</td>

  270.           <td class="paramname"><em>lbn</em>, </td>

  271.         </tr>

  272.         <tr>

  273.           <td class="paramkey"></td>

  274.           <td></td>

  275.           <td class="paramtype">uint8_t&#160;</td>

  276.           <td class="paramname"><em>option</em>&#160;</td>

  277.         </tr>

  278.         <tr>

  279.           <td></td>

  280.           <td>)</td>

  281.           <td></td><td></td>

  282.         </tr>

  283.       </table>

  284. </div><div class="memdoc">

  285. <p>Read a block into the cache. </p><dl class="params"><dt>Parameters</dt><dd>

  286.   <table class="params">

  287.     <tr><td class="paramdir">[in]</td><td class="paramname">lbn</td><td>Block to read. </td></tr>

  288.     <tr><td class="paramdir">[in]</td><td class="paramname">option</td><td>mode for cached block. </td></tr>

  289.   </table>

  290.   </dd>

  291. </dl>

  292. <dl class="section return"><dt>Returns</dt><dd>Address of cached block. </dd></dl>

  293. 

  294. </div>

  295. </div>

  296. <a class="anchor" id="a4d76d4f46ce5994f6fc4678a7b4f8cf1"></a>

  297. <div class="memitem">

  298. <div class="memproto">

  299.       <table class="memname">

  300.         <tr>

  301.           <td class="memname">bool FatCache::sync </td>

  302.           <td>(</td>

  303.           <td class="paramname"></td><td>)</td>

  304.           <td></td>

  305.         </tr>

  306.       </table>

  307. </div><div class="memdoc">

  308. <p>Write current block if dirty. </p><dl class="section return"><dt>Returns</dt><dd>true for success else false. </dd></dl>

  309. 

  310. </div>

  311. </div>

  312. <h2 class="groupheader">Member Data Documentation</h2>

  313. <a class="anchor" id="ae5ac564caf5c65f223a6f5c6adac0691"></a>

  314. <div class="memitem">

  315. <div class="memproto">

  316. <table class="mlabels">

  317.   <tr>

  318.   <td class="mlabels-left">

  319.       <table class="memname">

  320.         <tr>

  321.           <td class="memname">uint8_t const FatCache::CACHE_FOR_READ = 0</td>

  322.         </tr>

  323.       </table>

  324.   </td>

  325.   <td class="mlabels-right">

  326. <span class="mlabels"><span class="mlabel">static</span></span>  </td>

  327.   </tr>

  328. </table>

  329. </div><div class="memdoc">

  330. <p>Cache block for read. </p>

  331. 

  332. </div>

  333. </div>

  334. <a class="anchor" id="aeb3fa32ee4120404854c282f0c0e133a"></a>

  335. <div class="memitem">

  336. <div class="memproto">

  337. <table class="mlabels">

  338.   <tr>

  339.   <td class="mlabels-left">

  340.       <table class="memname">

  341.         <tr>

  342.           <td class="memname">uint8_t const FatCache::CACHE_FOR_WRITE = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a></td>

  343.         </tr>

  344.       </table>

  345.   </td>

  346.   <td class="mlabels-right">

  347. <span class="mlabels"><span class="mlabel">static</span></span>  </td>

  348.   </tr>

  349. </table>

  350. </div><div class="memdoc">

  351. <p>Cache block for write. </p>

  352. 

  353. </div>

  354. </div>

  355. <a class="anchor" id="adf974f55e53ee0aaa85abb0d7d67181c"></a>

  356. <div class="memitem">

  357. <div class="memproto">

  358. <table class="mlabels">

  359.   <tr>

  360.   <td class="mlabels-left">

  361.       <table class="memname">

  362.         <tr>

  363.           <td class="memname">const uint8_t FatCache::CACHE_OPTION_NO_READ = 4</td>

  364.         </tr>

  365.       </table>

  366.   </td>

  367.   <td class="mlabels-right">

  368. <span class="mlabels"><span class="mlabel">static</span></span>  </td>

  369.   </tr>

  370. </table>

  371. </div><div class="memdoc">

  372. <p>Sync existing block but do not read new block. </p>

  373. 

  374. </div>

  375. </div>

  376. <a class="anchor" id="a7307dd12178856bc3e823d8738856662"></a>

  377. <div class="memitem">

  378. <div class="memproto">

  379. <table class="mlabels">

  380.   <tr>

  381.   <td class="mlabels-left">

  382.       <table class="memname">

  383.         <tr>

  384.           <td class="memname">uint8_t const FatCache::CACHE_RESERVE_FOR_WRITE = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> | <a class="el" href="class_fat_cache.html#adf974f55e53ee0aaa85abb0d7d67181c">CACHE_OPTION_NO_READ</a></td>

  385.         </tr>

  386.       </table>

  387.   </td>

  388.   <td class="mlabels-right">

  389. <span class="mlabels"><span class="mlabel">static</span></span>  </td>

  390.   </tr>

  391. </table>

  392. </div><div class="memdoc">

  393. <p>Reserve cache block for write - do not read from block device. </p>

  394. 

  395. </div>

  396. </div>

  397. <a class="anchor" id="aac8c38e5c545d0f80b13d816117f626e"></a>

  398. <div class="memitem">

  399. <div class="memproto">

  400. <table class="mlabels">

  401.   <tr>

  402.   <td class="mlabels-left">

  403.       <table class="memname">

  404.         <tr>

  405.           <td class="memname">const uint8_t FatCache::CACHE_STATUS_DIRTY = 1</td>

  406.         </tr>

  407.       </table>

  408.   </td>

  409.   <td class="mlabels-right">

  410. <span class="mlabels"><span class="mlabel">static</span></span>  </td>

  411.   </tr>

  412. </table>

  413. </div><div class="memdoc">

  414. <p>Cached block is dirty </p>

  415. 

  416. </div>

  417. </div>

  418. <a class="anchor" id="ab70dc4a2e387f0e9bf392044c702ae32"></a>

  419. <div class="memitem">

  420. <div class="memproto">

  421. <table class="mlabels">

  422.   <tr>

  423.   <td class="mlabels-left">

  424.       <table class="memname">

  425.         <tr>

  426.           <td class="memname">const uint8_t FatCache::CACHE_STATUS_MASK = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> | <a class="el" href="class_fat_cache.html#a45236e1c0a2a098f08d3add0e4b1467a">CACHE_STATUS_MIRROR_FAT</a></td>

  427.         </tr>

  428.       </table>

  429.   </td>

  430.   <td class="mlabels-right">

  431. <span class="mlabels"><span class="mlabel">static</span></span>  </td>

  432.   </tr>

  433. </table>

  434. </div><div class="memdoc">

  435. <p>Cache block status bits </p>

  436. 

  437. </div>

  438. </div>

  439. <a class="anchor" id="a45236e1c0a2a098f08d3add0e4b1467a"></a>

  440. <div class="memitem">

  441. <div class="memproto">

  442. <table class="mlabels">

  443.   <tr>

  444.   <td class="mlabels-left">

  445.       <table class="memname">

  446.         <tr>

  447.           <td class="memname">const uint8_t FatCache::CACHE_STATUS_MIRROR_FAT = 2</td>

  448.         </tr>

  449.       </table>

  450.   </td>

  451.   <td class="mlabels-right">

  452. <span class="mlabels"><span class="mlabel">static</span></span>  </td>

  453.   </tr>

  454. </table>

  455. </div><div class="memdoc">

  456. <p>Cashed block is FAT entry and must be mirrored in second FAT. </p>

  457. 

  458. </div>

  459. </div>

  460. <hr/>The documentation for this class was generated from the following files:<ul>

  461. <li>Arduino/libraries/SdFat/src/FatLib/<a class="el" href="_fat_volume_8h.html">FatVolume.h</a></li>

  462. <li>Arduino/libraries/SdFat/src/FatLib/FatVolume.cpp</li>

  463. </ul>

  464. </div><!-- contents -->

  465. <!-- start footer part -->

  466. <hr class="footer"/><address class="footer"><small>

  467. Generated on Fri Feb 12 2016 13:43:49 for SdFat by &#160;<a href="http://www.doxygen.org/index.html">

  468. <img class="footer" src="doxygen.png" alt="doxygen"/>

  469. </a> 1.8.10

  470. </small></address>

  471. </body>

  472. </html>