savelij13
5fa1073a5a
- Fast seek feature is also applied to f_read() and f_write(). - f_lseek() reports required table size on creating CLMP. - Extended format syntax of f_printf function. - Ignores duplicated directory separators in given path names.
50 lines
2.4 KiB
HTML
50 lines
2.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta http-equiv="Content-Style-Type" content="text/css">
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<link rel="up" title="FatFs" href="../00index_e.html">
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<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/sfile.html">
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<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
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<title>FatFs - FIL</title>
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</head>
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<body>
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<div class="para">
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<h2>FIL</h2>
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<p>The FIL structure (file object) holds state of an open file. It is created by f_open function and discarded by f_close function. There is no member that can be changed by the application program except for <tt>cltbl</tt>. Note that a sector buffer is defined in this structure under non-tiny configuration so that the FIL structures should not be defined as auto variable.</p>
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<pre>
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<span class="k">typedef</span> <span class="k">struct</span> {
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FATFS* fs; <span class="c">/* Pointer to the owner file system object */</span>
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WORD id; <span class="c">/* Owner file system mount ID */</span>
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BYTE flag; <span class="c">/* File status flags */</span>
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BYTE pad1;
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DWORD fptr; <span class="c">/* File read/write pointer (Byte offset origin from top of the file) */</span>
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DWORD fsize; <span class="c">/* File size */</span>
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DWORD sclust; <span class="c">/* File start cluster */</span>
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DWORD clust; <span class="c">/* Current cluster */</span>
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DWORD dsect; <span class="c">/* Current data sector */</span>
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<span class="k">#if</span> !_FS_READONLY
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DWORD dir_sect; <span class="c">/* Sector containing the directory entry */</span>
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BYTE* dir_ptr; <span class="c">/* Ponter to the directory entry in the window */</span>
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<span class="k">#endif</span>
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<span class="k">#if</span> _USE_FASTSEEK
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DWORD* cltbl; <span class="c">/* Pointer to the cluster link map table (Nulled on file open) */</span>
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<span class="k">#endif</span>
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<span class="k">#if</span> _FS_SHARE
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UINT lockid; <span class="c">/* File lock ID */</span>
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<span class="k">#endif</span>
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<span class="k">#if</span> !_FS_TINY
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BYTE buf[_MAX_SS]; <span class="c">/* Data read/write buffer */</span>
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<span class="k">#endif</span>
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} FIL;
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</pre>
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</div>
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<p class="foot"><a href="../00index_e.html">Return</a></p>
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</body>
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</html>
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