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<h2>FIL</h2>
<p>The <tt>FIL</tt> structure (file object) holds 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>. Note that a sector buffer is defined in this structure at non-tiny configuration, so that the <tt>FIL</tt> structures 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 */</span>
DWORD dsect; <span class="c">/* Current data sector */</span>
<span class="k">#if</span> !_FS_READONLY
DWORD dir_sect; <span class="c">/* Sector 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) */</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 */</span>
<span class="k">#endif</span>
} FIL;
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