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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/fatfs/doc/en/readdir.html b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/fatfs/doc/en/readdir.html new file mode 100644 index 0000000..9c891d3 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/fatfs/doc/en/readdir.html @@ -0,0 +1,129 @@ +<!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->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 <= 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(&dir, path); <span class="c">/* Open the directory */</span> + if (res == FR_OK) { + for (;;) { + res = f_readdir(&dir, &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 & AM_DIR) { <span class="c">/* It is a directory */</span> + i = strlen(path); + sprintf(&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(&dir) + } + + return res; +} + + +int main (void) +{ + FATFS fs; + FRESULT res; + char buff[256]; + + + res = f_mount(&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> |