1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 2<html lang="en"> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5<meta http-equiv="Content-Style-Type" content="text/css"> 6<link rel="up" title="FatFs" href="../00index_e.html"> 7<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/sfile.html"> 8<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default"> 9<title>FatFs - FIL</title> 10</head> 11 12<body> 13 14<div class="para"> 15<h2>FIL</h2> 16<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 <em>must not</em> modify any member in this structure except for <tt>cltbl</tt>, or the FAT volume will be collapsed. Note that a sector buffer is defined in this structure at non-tiny configuration (<tt><a href="config.html#fs_tiny">FF_FS_TINY</a> == 0</tt>), so that the <tt>FIL</tt> structures at that configuration should not be defined as auto variable.</p> 17 18<pre> 19<span class="k">typedef</span> <span class="k">struct</span> { 20 FFOBJID obj; <span class="c">/* Object identifier */</span> 21 BYTE flag; <span class="c">/* File object status flags */</span> 22 BYTE err; <span class="c">/* Abort flag (error code) */</span> 23 FSIZE_t fptr; <span class="c">/* File read/write pointer (Byte offset origin from top of the file) */</span> 24 DWORD clust; <span class="c">/* Current cluster of fptr (One cluster behind if fptr is on the cluster boundary. Invalid if fptr == 0.) */</span> 25 DWORD sect; <span class="c">/* Current data sector (Can be invalid if fptr is on the cluster boundary.)*/</span> 26<span class="k">#if</span> !FF_FS_READONLY 27 DWORD dir_sect; <span class="c">/* Sector number containing the directory entry */</span> 28 BYTE* dir_ptr; <span class="c">/* Ponter to the directory entry in the window */</span> 29<span class="k">#endif</span> 30<span class="k">#if</span> FF_USE_FASTSEEK 31 DWORD* cltbl; <span class="c">/* Pointer to the cluster link map table (Nulled on file open. Set by application.) */</span> 32<span class="k">#endif</span> 33<span class="k">#if</span> !FF_FS_TINY 34 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> 35<span class="k">#endif</span> 36} FIL; 37</pre> 38 39</div> 40 41<p class="foot"><a href="../00index_e.html">Return</a></p> 42</body> 43</html> 44