keyboard/qmk/lib/ugfx/3rdparty/fatfs-0.13/documents/doc/sfile.html

44 lines
2.6 KiB
HTML

<!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/sfile.html">
<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
<title>FatFs - FIL</title>
</head>
<body>
<div class="para">
<h2>FIL</h2>
<p>The <tt>FIL</tt> structure (file object) holds the state of an open file. It is created by <tt>f_open</tt> function and discarded by <tt>f_close</tt> function. Application program must not modify any member in this structure except for <tt>cltbl</tt>, or any data on the FAT volume can be collapsed. Note that a sector buffer is defined in this structure at non-tiny configuration (<tt>FF_FS_TINY == 0</tt>), so that the <tt>FIL</tt> structures at that configuration should not be defined as auto variable.</p>
<pre>
<span class="k">typedef</span> <span class="k">struct</span> {
FFOBJID obj; <span class="c">/* Object identifier */</span>
BYTE flag; <span class="c">/* File object status flags */</span>
BYTE err; <span class="c">/* Abort flag (error code) */</span>
FSIZE_t fptr; <span class="c">/* File read/write pointer (Byte offset origin from top of the file) */</span>
DWORD clust; <span class="c">/* Current cluster of fptr (One cluster behind if fptr is on the cluster boundary. Invalid if fptr == 0.) */</span>
DWORD sect; <span class="c">/* Current data sector (Can be invalid if fptr is on the cluster boundary.)*/</span>
<span class="k">#if</span> !FF_FS_READONLY
DWORD dir_sect; <span class="c">/* Sector number containing the directory entry */</span>
BYTE* dir_ptr; <span class="c">/* Ponter to the directory entry in the window */</span>
<span class="k">#endif</span>
<span class="k">#if</span> FF_USE_FASTSEEK
DWORD* cltbl; <span class="c">/* Pointer to the cluster link map table (Nulled on file open. Set by application.) */</span>
<span class="k">#endif</span>
<span class="k">#if</span> !FF_FS_TINY
BYTE buf[FF_MAX_SS]; <span class="c">/* File private data transfer buffer (Always valid if fptr is not on the sector boundary but can be invalid if fptr is on the sector boundary.) */</span>
<span class="k">#endif</span>
} FIL;
</pre>
</div>
<p class="foot"><a href="../00index_e.html">Return</a></p>
</body>
</html>