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-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
-<html lang="en">
-<head>
-<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
-<meta http-equiv="Content-Style-Type" content="text/css">
-<link rel="up" title="FatFs" href="../00index_e.html">
-<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/readdir.html">
-<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
-<title>FatFs - f_readdir</title>
-</head>
-
-<body>
-
-<div class="para func">
-<h2>f_readdir</h2>
-<p>The f_readdir function reads an item of the directory.</p>
-<pre>
-FRESULT f_readdir (
- DIR* <span class="arg">dp</span>, <span class="c">/* [IN] Directory object */</span>
- FILINFO* <span class="arg">fno</span> <span class="c">/* [OUT] File information structure */</span>
-);
-</pre>
-</div>
-
-<div class="para arg">
-<h4>Parameters</h4>
-<dl class="par">
-<dt>dp</dt>
-<dd>Pointer to the open directory object or null pointer.</dd>
-<dt>fno</dt>
-<dd>Pointer to the <a href="sfileinfo.html">file information structure</a> to store the information about read item.</dd>
-</dl>
-</div>
-
-
-<div class="para ret">
-<h4>Return Values</h4>
-<p>
-<a href="rc.html#ok">FR_OK</a>,
-<a href="rc.html#de">FR_DISK_ERR</a>,
-<a href="rc.html#ie">FR_INT_ERR</a>,
-<a href="rc.html#io">FR_INVALID_OBJECT</a>,
-<a href="rc.html#tm">FR_TIMEOUT</a>,
-<a href="rc.html#nc">FR_NOT_ENOUGH_CORE</a>
-</p>
-</div>
-
-
-<div class="para desc">
-<h4>Description</h4>
-<p>The <tt>f_readdir</tt> function reads a directory item, informations about the object. All items in the directory can be read in sequence by <tt>f_readdir</tt> function calls. Dot entries (<tt>"."</tt> and <tt>".."</tt>) in the sub-directory are filtered out and they will never appear in the read items. When all directory items have been read and no item to read, a nul string is stored into the <tt>fno-&gt;fname[]</tt> without any error. When a null pointer is given to the <tt class="arg">fno</tt>, the read index of the directory object is rewinded.</p>
-<p>When support of long file name (LFN) is enabled, a member <tt>altname[]</tt> is defined in the file information structure to store the short file name of the object. In case of the some conditions listed below, short file name is stored into the <tt>fname[]</tt> and <tt>altname[]</tt> has a null string.</p>
-<ul>
-<li>The item has no long file name. (Not the case at exFAT volume)</li>
-<li>Setting of <tt>_MAX_LFN</tt> is insufficient for the long file name. (Not the case at <tt>_MAX_LFN == 255</tt>)</li>
-<li>The long file name contains any character not allowed in ANSI/OEM code. (Not the case at <tt>_LFN_UNICODE == 1</tt>)</li>
-</ul>
-<p>There is a problem on reading a directory of exFAT volume. The exFAT does not support short file name. This means no name can be returned on the condition above. If it is the case, a "?" is returned as file name to indicate that the object is not accessible. To avoid this problem, configure FatFs <tt>_LFN_UNICODE = 1</tt> and <tt>_MAX_LFN = 255</tt> to support the full feature of LFN specification.</p>
-</div>
-
-
-<div class="para comp">
-<h4>QuickInfo</h4>
-<p>Available when <tt>_FS_MINIMIZE &lt;= 1</tt>.</p>
-</div>
-
-
-<div class="para use">
-<h4>Sample Code</h4>
-<pre>
-FRESULT scan_files (
- char* path <span class="c">/* Start node to be scanned (***also used as work area***) */</span>
-)
-{
- FRESULT res;
- DIR dir;
- UINT i;
- static FILINFO fno;
-
-
- res = f_opendir(&amp;dir, path); <span class="c">/* Open the directory */</span>
- if (res == FR_OK) {
- for (;;) {
- res = f_readdir(&amp;dir, &amp;fno); <span class="c">/* Read a directory item */</span>
- if (res != FR_OK || fno.fname[0] == 0) break; <span class="c">/* Break on error or end of dir */</span>
- if (fno.fattrib &amp; AM_DIR) { <span class="c">/* It is a directory */</span>
- i = strlen(path);
- sprintf(&amp;path[i], "/%s", fno.fname);
- res = scan_files(path); <span class="c">/* Enter the directory */</span>
- if (res != FR_OK) break;
- path[i] = 0;
- } else { <span class="c">/* It is a file. */</span>
- printf("%s/%s\n", path, fno.fname);
- }
- }
- f_closedir(&amp;dir)
- }
-
- return res;
-}
-
-
-int main (void)
-{
- FATFS fs;
- FRESULT res;
- char buff[256];
-
-
- res = f_mount(&amp;fs, "", 1);
- if (res == FR_OK) {
- strcpy(buff, "/");
- res = scan_files(buff);
- }
-
- return res;
-}
-</pre>
-</div>
-
-
-<div class="para ref">
-<h4>See Also</h4>
-<p><tt><a href="opendir.html">f_opendir</a>, <a href="closedir.html">f_closedir</a>, <a href="stat.html">f_stat</a>, <a href="sfileinfo.html">FILINFO</a>, <a href="sdir.html">DIR</a></tt></p>
-</div>
-
-<p class="foot"><a href="../00index_e.html">Return</a></p>
-</body>
-</html>