FatFs - FIL

FIL

The FIL structure (file object) holds state of an open file. It is created by f_open() function and discarded by f_close() function. Application program must not modify any member in this structure except for cltbl. Note that a sector buffer is defined in this structure at non-tiny configuration, so that the FIL structures should not be defined as auto variable.

+ +

+typedef struct {
+    FATFS*  fs;           /* Pointer to the owner file system object */
+    WORD    id;           /* Owner file system mount ID */
+    BYTE    flag;         /* File object status flags */
+    BYTE    err;          /* Abort flag (error code) */
+    DWORD   fptr;         /* File read/write pointer (Byte offset origin from top of the file) */
+    DWORD   fsize;        /* File size in unit of byte */
+    DWORD   sclust;       /* File start cluster */
+    DWORD   clust;        /* Current cluster */
+    DWORD   dsect;        /* Current data sector */
+#if !_FS_READONLY
+    DWORD   dir_sect;     /* Sector containing the directory entry */
+    BYTE*   dir_ptr;      /* Ponter to the directory entry in the window */
+#endif
+#if _USE_FASTSEEK
+    DWORD*  cltbl;        /* Pointer to the cluster link map table (Nulled on file open) */
+#endif
+#if _FS_LOCK
+    UINT    lockid;       /* Fle lock ID */
+#endif
+#if !_FS_TINY
+    BYTE    buf[_MAX_SS]; /* File private data transfer buffer */
+#endif
+} FIL;
+

+ +