?? readdir.html
字號:
<!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="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
<title>FatFs - f_readdir</title>
</head>
<body>
<div class="para">
<h2>f_readdir</h2>
<p>The f_readdir function reads directory entries.</p>
<pre>
FRESULT f_readdir (
DIR* <em>DirObject</em>, /* Pointer to the directory object strcture */
FILINFO* <em>FileInfo</em> /* Pointer to the blank file information structure */
);
</pre>
</div>
<div class="para">
<h4>Parameters</h4>
<dl class="par">
<dt>DirObject</dt>
<dd>Pointer to the open directory strcture.</dd>
<dt>FileInfo</dt>
<dd>Pointer to the file information structure to store the read item.</dd>
</dl>
</div>
<div class="para">
<h4>Return Values</h4>
<dl class="ret">
<dt>FR_OK (0)</dt>
<dd>The function succeeded.</dd>
<dt>FR_NOT_READY</dt>
<dd>The disk drive cannot work due to no medium in the drive or any other reason.</dd>
<dt>FR_RW_ERROR</dt>
<dd>Any error occured in low level disk I/O.</dd>
<dt>FR_INVALID_OBJECT</dt>
<dd>The directory object is invalid.</dd>
</dl>
</div>
<div class="para">
<h4>Description</h4>
<p>The f_readdir function reads directory entries in sequence. All items in the directory can be read by calling f_readdir function repeatedly. When all directory items have been read and no item to read, the function returns a null string into <tt>f_name[]</tt> member without any error. For details of the file informations, refer to the <tt>FILINFO</tt>. This function is not supported in minimization level of 2.</p>
</div>
<div class="para">
<h4>Sample Code</h4>
<pre>
void scan_files (char* path)
{
FILINFO finfo;
DIR dirs;
int i;
if (f_opendir(&dirs, path) == FR_OK) {
i = strlen(path);
while ((f_readdir(&dirs, &finfo) == FR_OK) && finfo.f_name[0]) {
if (finfo.f_attrib & AM_DIR) {
sprintf(path+i, "/%s", &finfo.f_name[0]);
scan_files(path);
*(path+i) = '\0';
} else {
printf("%s/%s\n", path, &finfo.f_name[0]);
}
}
}
}
</pre>
</div>
<div class="para">
<h4>References</h4>
<p><tt><a href="opendir.html">f_opendir</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>
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -