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5 | <meta http-equiv="Content-Style-Type" content="text/css">\r |
6 | <link rel="up" title="FatFs" href="../00index_e.html">\r | |
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9 | <title>FatFs - FIL</title>\r | |
10 | </head>\r | |
11 | \r | |
12 | <body>\r | |
13 | \r | |
14 | <div class="para">\r | |
15 | <h2>FIL</h2>\r | |
289f6a14 | 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>\r |
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17 | \r |
18 | <pre>\r | |
19 | <span class="k">typedef</span> <span class="k">struct</span> {\r | |
289f6a14 | 20 | FFOBJID obj; <span class="c">/* Object identifier */</span>\r |
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21 | BYTE flag; <span class="c">/* File object status flags */</span>\r |
22 | BYTE err; <span class="c">/* Abort flag (error code) */</span>\r | |
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23 | FSIZE_t fptr; <span class="c">/* File read/write pointer (Byte offset origin from top of the file) */</span>\r |
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>\r | |
5630b930 | 25 | LBA_t sect; <span class="c">/* Current data sector (Can be invalid if fptr is on the cluster boundary.)*/</span>\r |
289f6a14 | 26 | <span class="k">#if</span> !FF_FS_READONLY\r |
5630b930 | 27 | LBA_t dir_sect; <span class="c">/* Sector number containing the directory entry */</span>\r |
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28 | BYTE* dir_ptr; <span class="c">/* Ponter to the directory entry in the window */</span>\r |
29 | <span class="k">#endif</span>\r | |
289f6a14 | 30 | <span class="k">#if</span> FF_USE_FASTSEEK\r |
70702af1 | 31 | DWORD* cltbl; <span class="c">/* Pointer to the cluster link map table (Nulled on file open. Set by application.) */</span>\r |
53668523 | 32 | <span class="k">#endif</span>\r |
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33 | <span class="k">#if</span> !FF_FS_TINY\r |
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>\r | |
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35 | <span class="k">#endif</span>\r |
36 | } FIL;\r | |
37 | </pre>\r | |
38 | \r | |
39 | </div>\r | |
40 | \r | |
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