50 lines
2.9 KiB
HTML
50 lines
2.9 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>_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> {
|
|
FATFS* fs; <span class="c">/* Pointer to the owner file system object */</span>
|
|
WORD id; <span class="c">/* Owner file system mount ID */</span>
|
|
BYTE flag; <span class="c">/* File object status flags */</span>
|
|
BYTE err; <span class="c">/* Abort flag (error code) */</span>
|
|
DWORD fptr; <span class="c">/* File read/write pointer (Byte offset origin from top of the file) */</span>
|
|
DWORD fsize; <span class="c">/* File size in unit of byte */</span>
|
|
DWORD sclust; <span class="c">/* File start cluster */</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 dsect; <span class="c">/* Current data sector (Can be invalid if fptr is on the cluster boundary.)*/</span>
|
|
<span class="k">#if</span> !_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> _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> _FS_LOCK
|
|
UINT lockid; <span class="c">/* Fle lock ID */</span>
|
|
<span class="k">#endif</span>
|
|
<span class="k">#if</span> !_FS_TINY
|
|
BYTE buf[_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>
|