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FreeRTOS
[armadillo_firmware.git] / FreeRTOS / Common / FileSystem / FatFs-0.7e / src / Copy of ff.c
blob80efa7b48d6aadaed17a9bb59a20b368e8bf9975
1 /*----------------------------------------------------------------------------/
2 / FatFs - FAT file system module R0.07e (C)ChaN, 2009
3 /-----------------------------------------------------------------------------/
4 / FatFs module is a generic FAT file system module for small embedded systems.
5 / This is a free software that opened for education, research and commercial
6 / developments under license policy of following trems.
7 /
8 / Copyright (C) 2009, ChaN, all right reserved.
9 /
10 / * The FatFs module is a free software and there is NO WARRANTY.
11 / * No restriction on use. You can use, modify and redistribute it for
12 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
13 / * Redistributions of source code must retain the above copyright notice.
14 /
15 /-----------------------------------------------------------------------------/
16 / Feb 26,'06 R0.00 Prototype.
17 /
18 / Apr 29,'06 R0.01 First stable version.
19 /
20 / Jun 01,'06 R0.02 Added FAT12 support.
21 / Removed unbuffered mode.
22 / Fixed a problem on small (<32M) patition.
23 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
24 /
25 / Sep 22,'06 R0.03 Added f_rename().
26 / Changed option _FS_MINIMUM to _FS_MINIMIZE.
27 / Dec 11,'06 R0.03a Improved cluster scan algolithm to write files fast.
28 / Fixed f_mkdir() creates incorrect directory on FAT32.
29 /
30 / Feb 04,'07 R0.04 Supported multiple drive system.
31 / Changed some interfaces for multiple drive system.
32 / Changed f_mountdrv() to f_mount().
33 / Added f_mkfs().
34 / Apr 01,'07 R0.04a Supported multiple partitions on a plysical drive.
35 / Added a capability of extending file size to f_lseek().
36 / Added minimization level 3.
37 / Fixed an endian sensitive code in f_mkfs().
38 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
39 / Added FSInfo support.
40 / Fixed DBCS name can result FR_INVALID_NAME.
41 / Fixed short seek (<= csize) collapses the file object.
42 /
43 / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
44 / Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
45 / Fixed f_mkdir() on FAT32 creates incorrect directory.
46 / Feb 03,'08 R0.05a Added f_truncate() and f_utime().
47 / Fixed off by one error at FAT sub-type determination.
48 / Fixed btr in f_read() can be mistruncated.
49 / Fixed cached sector is not flushed when create and close
50 / without write.
51 /
52 / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
53 / Improved performance of f_lseek() on moving to the same
54 / or following cluster.
55 /
56 / Apr 01,'09 R0.07 Merged Tiny-FatFs as a buffer configuration option.
57 / Added long file name support.
58 / Added multiple code page support.
59 / Added re-entrancy for multitask operation.
60 / Added auto cluster size selection to f_mkfs().
61 / Added rewind option to f_readdir().
62 / Changed result code of critical errors.
63 / Renamed string functions to avoid name collision.
64 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
65 / Added multiple sector size support.
66 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
67 / Fixed wrong cache control in f_lseek().
68 / Added relative path feature.
69 / Added f_chdir() and f_chdrive().
70 / Added proper case conversion to extended char.
71 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
72 / Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
73 / Fixed name matching error on the 13 char boundary.
74 / Added a configuration option, _LFN_UNICODE.
75 / Changed f_readdir() to return the SFN with always upper
76 / case on non-LFN cfg.
77 /---------------------------------------------------------------------------*/
78
79 #include "ff.h" /* FatFs configurations and declarations */
80 #include "diskio.h" /* Declarations of low level disk I/O functions */
81
82 /*--------------------------------------------------------------------------
83
84 Module Private Definitions
85
86 ---------------------------------------------------------------------------*/
87
88 #if _FATFS != 0x007E
89 #error Wrong include file (ff.h).
90 #endif
91
92 #if _FS_REENTRANT
93 #if _USE_LFN == 1
94 #error Static LFN work area must not be used in re-entrant configuration.
95 #endif
96 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
97 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
98
99 #else
100 #define ENTER_FF(fs)
101 #define LEAVE_FF(fs, res) return res
102
103 #endif
104
105 #define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
106
107 #ifndef NULL
108 #define NULL 0
109 #endif
110
111 /* Name status flags */
112 #define NS 11 /* Offset of name status byte */
113 #define NS_LOSS 0x01 /* Out of 8.3 format */
114 #define NS_LFN 0x02 /* Force to create LFN entry */
115 #define NS_LAST 0x04 /* Last segment */
116 #define NS_BODY 0x08 /* Lower case flag (body) */
117 #define NS_EXT 0x10 /* Lower case flag (ext) */
118 #define NS_DOT 0x20 /* Dot entry */
119
120
121
122
123 /*--------------------------------------------------------------------------
124
125 Private Work Area
126
127 ---------------------------------------------------------------------------*/
128
129 #if _DRIVES < 1 || _DRIVES > 9
130 #error Number of drives must be 1-9.
131 #endif
132 static
133 FATFS *FatFs[_DRIVES]; /* Pointer to the file system objects (logical drives) */
134
135 static
136 WORD Fsid; /* File system mount ID */
137
138 #if _FS_RPATH
139 static
140 BYTE Drive; /* Current drive */
141 #endif
142
143
144 #if _USE_LFN == 1 /* LFN with static LFN working buffer */
145 static
146 WCHAR LfnBuf[_MAX_LFN + 1];
147 #define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR *lp = LfnBuf
148 #define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp
149
150 #elif _USE_LFN > 1 /* LFN with dynamic LFN working buffer */
151 #define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR lbuf[_MAX_LFN + 1], *lp = lbuf
152 #define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp
153
154 #else /* No LFN */
155 #define NAMEBUF(sp,lp) BYTE sp[12]
156 #define INITBUF(dj,sp,lp) dj.fn = sp
157
158 #endif
159
160
161
162
163 /*--------------------------------------------------------------------------
164
165 Module Private Functions
166
167 ---------------------------------------------------------------------------*/
168
169
170 /*-----------------------------------------------------------------------*/
171 /* String functions */
172 /*-----------------------------------------------------------------------*/
173
174 /* Copy memory to memory */
175 static
176 void mem_cpy (void* dst, const void* src, int cnt) {
177 char *d = (char*)dst;
178 const char *s = (const char *)src;
179 while (cnt--) *d++ = *s++;
180 }
181
182 /* Fill memory */
183 static
184 void mem_set (void* dst, int val, int cnt) {
185 char *d = (char*)dst;
186 while (cnt--) *d++ = (char)val;
187 }
188
189 /* Compare memory to memory */
190 static
191 int mem_cmp (const void* dst, const void* src, int cnt) {
192 const char *d = (const char *)dst, *s = (const char *)src;
193 int r = 0;
194 while (cnt-- && (r = *d++ - *s++) == 0) ;
195 return r;
196 }
197
198 /* Check if chr is contained in the string */
199 static
200 int chk_chr (const char* str, int chr) {
201 while (*str && *str != chr) str++;
202 return *str;
203 }
204
205
206
207 /*-----------------------------------------------------------------------*/
208 /* Request/Release grant to access the volume */
209 /*-----------------------------------------------------------------------*/
210 #if _FS_REENTRANT
211
212 static
213 BOOL lock_fs (
214 FATFS *fs /* File system object */
215 )
216 {
217 return ff_req_grant(fs->sobj);
218 }
219
220
221 static
222 void unlock_fs (
223 FATFS *fs, /* File system object */
224 FRESULT res /* Result code to be returned */
225 )
226 {
227 if (res != FR_NOT_ENABLED &&
228 res != FR_INVALID_DRIVE &&
229 res != FR_INVALID_OBJECT &&
230 res != FR_TIMEOUT) {
231 ff_rel_grant(fs->sobj);
232 }
233 }
234 #endif
235
236
237
238 /*-----------------------------------------------------------------------*/
239 /* Change window offset */
240 /*-----------------------------------------------------------------------*/
241
242 static
243 FRESULT move_window (
244 FATFS *fs, /* File system object */
245 DWORD sector /* Sector number to make apperance in the fs->win[] */
246 ) /* Move to zero only writes back dirty window */
247 {
248 DWORD wsect;
249
250
251 wsect = fs->winsect;
252 if (wsect != sector) { /* Changed current window */
253 #if !_FS_READONLY
254 if (fs->wflag) { /* Write back dirty window if needed */
255 if (disk_write(fs->drive, fs->win, wsect, 1) != RES_OK)
256 return FR_DISK_ERR;
257 fs->wflag = 0;
258 if (wsect < (fs->fatbase + fs->sects_fat)) { /* In FAT area */
259 BYTE nf;
260 for (nf = fs->n_fats; nf > 1; nf--) { /* Refrect the change to all FAT copies */
261 wsect += fs->sects_fat;
262 disk_write(fs->drive, fs->win, wsect, 1);
263 }
264 }
265 }
266 #endif
267 if (sector) {
268 if (disk_read(fs->drive, fs->win, sector, 1) != RES_OK)
269 return FR_DISK_ERR;
270 fs->winsect = sector;
271 }
272 }
273
274 return FR_OK;
275 }
276
277
278
279
280 /*-----------------------------------------------------------------------*/
281 /* Clean-up cached data */
282 /*-----------------------------------------------------------------------*/
283 #if !_FS_READONLY
284 static
285 FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */
286 FATFS *fs /* File system object */
287 )
288 {
289 FRESULT res;
290
291
292 res = move_window(fs, 0);
293 if (res == FR_OK) {
294 /* Update FSInfo sector if needed */
295 if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
296 fs->winsect = 0;
297 mem_set(fs->win, 0, 512);
298 ST_WORD(fs->win+BS_55AA, 0xAA55);
299 ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
300 ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
301 ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
302 ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
303 disk_write(fs->drive, fs->win, fs->fsi_sector, 1);
304 fs->fsi_flag = 0;
305 }
306 /* Make sure that no pending write process in the physical drive */
307 if (disk_ioctl(fs->drive, CTRL_SYNC, (void*)NULL) != RES_OK)
308 res = FR_DISK_ERR;
309 }
310
311 return res;
312 }
313 #endif
314
315
316
317
318 /*-----------------------------------------------------------------------*/
319 /* FAT access - Read value of a FAT entry */
320 /*-----------------------------------------------------------------------*/
321
322
323 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Interal error, Else:Cluster status */
324 FATFS *fs, /* File system object */
325 DWORD clst /* Cluster# to get the link information */
326 )
327 {
328 UINT wc, bc;
329 DWORD fsect;
330
331
332 if (clst < 2 || clst >= fs->max_clust) /* Range check */
333 return 1;
334
335 fsect = fs->fatbase;
336 switch (fs->fs_type) {
337 case FS_FAT12 :
338 bc = clst; bc += bc / 2;
339 if (move_window(fs, fsect + (bc / SS(fs)))) break;
340 wc = fs->win[bc & (SS(fs) - 1)]; bc++;
341 if (move_window(fs, fsect + (bc / SS(fs)))) break;
342 wc |= (WORD)fs->win[bc & (SS(fs) - 1)] << 8;
343 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
344
345 case FS_FAT16 :
346 if (move_window(fs, fsect + (clst / (SS(fs) / 2)))) break;
347 return LD_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)]);
348
349 case FS_FAT32 :
350 if (move_window(fs, fsect + (clst / (SS(fs) / 4)))) break;
351 return LD_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)]) & 0x0FFFFFFF;
352 }
353
354 return 0xFFFFFFFF; /* An error occured at the disk I/O layer */
355 }
356
357
358
359
360 /*-----------------------------------------------------------------------*/
361 /* FAT access - Change value of a FAT entry */
362 /*-----------------------------------------------------------------------*/
363 #if !_FS_READONLY
364
365 FRESULT put_fat (
366 FATFS *fs, /* File system object */
367 DWORD clst, /* Cluster# to be changed in range of 2 to fs->max_clust - 1 */
368 DWORD val /* New value to mark the cluster */
369 )
370 {
371 UINT bc;
372 BYTE *p;
373 DWORD fsect;
374 FRESULT res;
375
376
377 if (clst < 2 || clst >= fs->max_clust) { /* Range check */
378 res = FR_INT_ERR;
379
380 } else {
381 fsect = fs->fatbase;
382 switch (fs->fs_type) {
383 case FS_FAT12 :
384 bc = clst; bc += bc / 2;
385 res = move_window(fs, fsect + (bc / SS(fs)));
386 if (res != FR_OK) break;
387 p = &fs->win[bc & (SS(fs) - 1)];
388 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
389 bc++;
390 fs->wflag = 1;
391 res = move_window(fs, fsect + (bc / SS(fs)));
392 if (res != FR_OK) break;
393 p = &fs->win[bc & (SS(fs) - 1)];
394 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
395 break;
396
397 case FS_FAT16 :
398 res = move_window(fs, fsect + (clst / (SS(fs) / 2)));
399 if (res != FR_OK) break;
400 ST_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)], (WORD)val);
401 break;
402
403 case FS_FAT32 :
404 res = move_window(fs, fsect + (clst / (SS(fs) / 4)));
405 if (res != FR_OK) break;
406 ST_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)], val);
407 break;
408
409 default :
410 res = FR_INT_ERR;
411 }
412 fs->wflag = 1;
413 }
414
415 return res;
416 }
417 #endif /* !_FS_READONLY */
418
419
420
421
422 /*-----------------------------------------------------------------------*/
423 /* FAT handling - Remove a cluster chain */
424 /*-----------------------------------------------------------------------*/
425 #if !_FS_READONLY
426 static
427 FRESULT remove_chain (
428 FATFS *fs, /* File system object */
429 DWORD clst /* Cluster# to remove a chain from */
430 )
431 {
432 FRESULT res;
433 DWORD nxt;
434
435
436 if (clst < 2 || clst >= fs->max_clust) { /* Check the range of cluster# */
437 res = FR_INT_ERR;
438
439 } else {
440 res = FR_OK;
441 while (clst < fs->max_clust) { /* Not a last link? */
442 nxt = get_fat(fs, clst); /* Get cluster status */
443 if (nxt == 0) break; /* Empty cluster? */
444 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
445 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
446 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
447 if (res != FR_OK) break;
448 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
449 fs->free_clust++;
450 fs->fsi_flag = 1;
451 }
452 clst = nxt; /* Next cluster */
453 }
454 }
455
456 return res;
457 }
458 #endif
459
460
461
462
463 /*-----------------------------------------------------------------------*/
464 /* FAT handling - Stretch or Create a cluster chain */
465 /*-----------------------------------------------------------------------*/
466 #if !_FS_READONLY
467 static
468 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
469 FATFS *fs, /* File system object */
470 DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
471 )
472 {
473 DWORD cs, ncl, scl, mcl;
474
475
476 mcl = fs->max_clust;
477 if (clst == 0) { /* Create new chain */
478 scl = fs->last_clust; /* Get suggested start point */
479 if (scl == 0 || scl >= mcl) scl = 1;
480 }
481 else { /* Stretch existing chain */
482 cs = get_fat(fs, clst); /* Check the cluster status */
483 if (cs < 2) return 1; /* It is an invalid cluster */
484 if (cs < mcl) return cs; /* It is already followed by next cluster */
485 scl = clst;
486 }
487
488 ncl = scl; /* Start cluster */
489 for (;;) {
490 ncl++; /* Next cluster */
491 if (ncl >= mcl) { /* Wrap around */
492 ncl = 2;
493 if (ncl > scl) return 0; /* No free custer */
494 }
495 cs = get_fat(fs, ncl); /* Get the cluster status */
496 if (cs == 0) break; /* Found a free cluster */
497 if (cs == 0xFFFFFFFF || cs == 1)/* An error occured */
498 return cs;
499 if (ncl == scl) return 0; /* No free custer */
500 }
501
502 if (put_fat(fs, ncl, 0x0FFFFFFF)) /* Mark the new cluster "in use" */
503 return 0xFFFFFFFF;
504 if (clst != 0) { /* Link it to the previous one if needed */
505 if (put_fat(fs, clst, ncl))
506 return 0xFFFFFFFF;
507 }
508
509 fs->last_clust = ncl; /* Update FSINFO */
510 if (fs->free_clust != 0xFFFFFFFF) {
511 fs->free_clust--;
512 fs->fsi_flag = 1;
513 }
514
515 return ncl; /* Return new cluster number */
516 }
517 #endif /* !_FS_READONLY */
518
519
520
521
522 /*-----------------------------------------------------------------------*/
523 /* Get sector# from cluster# */
524 /*-----------------------------------------------------------------------*/
525
526
527 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
528 FATFS *fs, /* File system object */
529 DWORD clst /* Cluster# to be converted */
530 )
531 {
532 clst -= 2;
533 if (clst >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */
534 return clst * fs->csize + fs->database;
535 }
536
537
538
539
540 /*-----------------------------------------------------------------------*/
541 /* Directory handling - Seek directory index */
542 /*-----------------------------------------------------------------------*/
543
544 static
545 FRESULT dir_seek (
546 DIR *dj, /* Pointer to directory object */
547 WORD idx /* Directory index number */
548 )
549 {
550 DWORD clst;
551 WORD ic;
552
553
554 dj->index = idx;
555 clst = dj->sclust;
556 if (clst == 1 || clst >= dj->fs->max_clust) /* Check start cluster range */
557 return FR_INT_ERR;
558 if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
559 clst = dj->fs->dirbase;
560
561 if (clst == 0) { /* Static table */
562 dj->clust = clst;
563 if (idx >= dj->fs->n_rootdir) /* Index is out of range */
564 return FR_INT_ERR;
565 dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / 32); /* Sector# */
566 }
567 else { /* Dynamic table */
568 ic = SS(dj->fs) / 32 * dj->fs->csize; /* Entries per cluster */
569 while (idx >= ic) { /* Follow cluster chain */
570 clst = get_fat(dj->fs, clst); /* Get next cluster */
571 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
572 if (clst < 2 || clst >= dj->fs->max_clust) /* Reached to end of table or int error */
573 return FR_INT_ERR;
574 idx -= ic;
575 }
576 dj->clust = clst;
577 dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / 32); /* Sector# */
578 }
579
580 dj->dir = dj->fs->win + (idx % (SS(dj->fs) / 32)) * 32; /* Ptr to the entry in the sector */
581
582 return FR_OK; /* Seek succeeded */
583 }
584
585
586
587
588 /*-----------------------------------------------------------------------*/
589 /* Directory handling - Move directory index next */
590 /*-----------------------------------------------------------------------*/
591
592 static
593 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not streach */
594 DIR *dj, /* Pointer to directory object */
595 BOOL streach /* FALSE: Do not streach table, TRUE: Streach table if needed */
596 )
597 {
598 DWORD clst;
599 WORD i;
600
601
602 i = dj->index + 1;
603 if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
604 return FR_NO_FILE;
605
606 if (!(i % (SS(dj->fs) / 32))) { /* Sector changed? */
607 dj->sect++; /* Next sector */
608
609 if (dj->clust == 0) { /* Static table */
610 if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
611 return FR_NO_FILE;
612 }
613 else { /* Dynamic table */
614 if (((i / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
615 clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
616 if (clst <= 1) return FR_INT_ERR;
617 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
618 if (clst >= dj->fs->max_clust) { /* When it reached end of dynamic table */
619 #if !_FS_READONLY
620 BYTE c;
621 if (!streach) return FR_NO_FILE; /* When do not streach, report EOT */
622 clst = create_chain(dj->fs, dj->clust); /* Streach cluster chain */
623 if (clst == 0) return FR_DENIED; /* No free cluster */
624 if (clst == 1) return FR_INT_ERR;
625 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
626 /* Clean-up streached table */
627 if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
628 mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
629 dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
630 for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */
631 dj->fs->wflag = 1;
632 if (move_window(dj->fs, 0)) return FR_DISK_ERR;
633 dj->fs->winsect++;
634 }
635 dj->fs->winsect -= c; /* Rewind window address */
636 #else
637 return FR_NO_FILE; /* Report EOT */
638 #endif
639 }
640 dj->clust = clst; /* Initialize data for new cluster */
641 dj->sect = clust2sect(dj->fs, clst);
642 }
643 }
644 }
645
646 dj->index = i;
647 dj->dir = dj->fs->win + (i % (SS(dj->fs) / 32)) * 32;
648
649 return FR_OK;
650 }
651
652
653
654
655 /*-----------------------------------------------------------------------*/
656 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
657 /*-----------------------------------------------------------------------*/
658 #if _USE_LFN
659 static
660 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */
661
662
663 static
664 BOOL cmp_lfn ( /* TRUE:Matched, FALSE:Not matched */
665 WCHAR *lfnbuf, /* Pointer to the LFN to be compared */
666 BYTE *dir /* Pointer to the directory entry containing a part of LFN */
667 )
668 {
669 int i, s;
670 WCHAR wc, uc;
671
672
673 i = ((dir[LDIR_Ord] & 0xBF) - 1) * 13; /* Get offset in the LFN buffer */
674 s = 0; wc = 1;
675 do {
676 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
677 if (wc) { /* Last char has not been processed */
678 wc = ff_wtoupper(uc); /* Convert it to upper case */
679 if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
680 return FALSE; /* Not matched */
681 } else {
682 if (uc != 0xFFFF) return FALSE; /* Check filler */
683 }
684 } while (++s < 13); /* Repeat until all chars in the entry are checked */
685
686 if ((dir[LDIR_Ord] & 0x40) && wc && lfnbuf[i]) /* Last segment matched but different length */
687 return FALSE;
688
689 return TRUE; /* The part of LFN matched */
690 }
691
692
693
694 static
695 BOOL pick_lfn ( /* TRUE:Succeeded, FALSE:Buffer overflow */
696 WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */
697 BYTE *dir /* Pointer to the directory entry */
698 )
699 {
700 int i, s;
701 WCHAR wc, uc;
702
703
704 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
705
706 s = 0; wc = 1;
707 do {
708 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
709 if (wc) { /* Last char has not been processed */
710 if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */
711 lfnbuf[i++] = wc = uc; /* Store it */
712 } else {
713 if (uc != 0xFFFF) return FALSE; /* Check filler */
714 }
715 } while (++s < 13); /* Read all character in the entry */
716
717 if (dir[LDIR_Ord] & 0x40) { /* Put terminator if it is the last LFN part */
718 if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */
719 lfnbuf[i] = 0;
720 }
721
722 return TRUE;
723 }
724
725
726 #if !_FS_READONLY
727 static
728 void fit_lfn (
729 const WCHAR *lfnbuf, /* Pointer to the LFN buffer */
730 BYTE *dir, /* Pointer to the directory entry */
731 BYTE ord, /* LFN order (1-20) */
732 BYTE sum /* SFN sum */
733 )
734 {
735 int i, s;
736 WCHAR wc;
737
738
739 dir[LDIR_Chksum] = sum; /* Set check sum */
740 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
741 dir[LDIR_Type] = 0;
742 ST_WORD(dir+LDIR_FstClusLO, 0);
743
744 i = (ord - 1) * 13; /* Get offset in the LFN buffer */
745 s = wc = 0;
746 do {
747 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
748 ST_WORD(dir+LfnOfs[s], wc); /* Put it */
749 if (!wc) wc = 0xFFFF; /* Padding chars following last char */
750 } while (++s < 13);
751 if (wc == 0xFFFF || !lfnbuf[i]) ord |= 0x40; /* Bottom LFN part is the start of LFN sequence */
752 dir[LDIR_Ord] = ord; /* Set the LFN order */
753 }
754
755 #endif
756 #endif
757
758
759
760 /*-----------------------------------------------------------------------*/
761 /* Create numbered name */
762 /*-----------------------------------------------------------------------*/
763 #if _USE_LFN
764 void gen_numname (
765 BYTE *dst, /* Pointer to genartated SFN */
766 const BYTE *src, /* Pointer to source SFN to be modified */
767 const WCHAR *lfn, /* Pointer to LFN */
768 WORD num /* Sequense number */
769 )
770 {
771 char ns[8];
772 int i, j;
773
774
775 mem_cpy(dst, src, 11);
776
777 if (num > 5) { /* On many collisions, generate a hash number instead of sequencial number */
778 do num = (num >> 1) + (num << 15) + (WORD)*lfn++; while (*lfn);
779 }
780
781 /* itoa */
782 i = 7;
783 do {
784 ns[i--] = (num % 10) + '0';
785 num /= 10;
786 } while (num);
787 ns[i] = '~';
788
789 /* Append the number */
790 for (j = 0; j < i && dst[j] != ' '; j++) {
791 if (IsDBCS1(dst[j])) {
792 if (j == i - 1) break;
793 j++;
794 }
795 }
796 do {
797 dst[j++] = (i < 8) ? ns[i++] : ' ';
798 } while (j < 8);
799 }
800 #endif
801
802
803
804
805 /*-----------------------------------------------------------------------*/
806 /* Calculate sum of an SFN */
807 /*-----------------------------------------------------------------------*/
808 #if _USE_LFN
809 static
810 BYTE sum_sfn (
811 const BYTE *dir /* Ptr to directory entry */
812 )
813 {
814 BYTE sum = 0;
815 int n = 11;
816
817 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
818 return sum;
819 }
820 #endif
821
822
823
824
825 /*-----------------------------------------------------------------------*/
826 /* Directory handling - Find an object in the directory */
827 /*-----------------------------------------------------------------------*/
828
829 static
830 FRESULT dir_find (
831 DIR *dj /* Pointer to the directory object linked to the file name */
832 )
833 {
834 FRESULT res;
835 BYTE c, *dir;
836 #if _USE_LFN
837 BYTE a, ord, sum;
838 #endif
839
840 res = dir_seek(dj, 0); /* Rewind directory object */
841 if (res != FR_OK) return res;
842
843 #if _USE_LFN
844 ord = sum = 0xFF;
845 #endif
846 do {
847 res = move_window(dj->fs, dj->sect);
848 if (res != FR_OK) break;
849 dir = dj->dir; /* Ptr to the directory entry of current index */
850 c = dir[DIR_Name];
851 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
852 #if _USE_LFN /* LFN configuration */
853 a = dir[DIR_Attr] & AM_MASK;
854 if (c == 0xE5 || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
855 ord = 0xFF;
856 } else {
857 if (a == AM_LFN) { /* An LFN entry is found */
858 if (dj->lfn) {
859 if (c & 0x40) { /* Is it start of LFN sequence? */
860 sum = dir[LDIR_Chksum];
861 c &= 0xBF; ord = c; /* LFN start order */
862 dj->lfn_idx = dj->index;
863 }
864 /* Check validity of the LFN entry and compare it with given name */
865 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
866 }
867 } else { /* An SFN entry is found */
868 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
869 ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
870 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */
871 }
872 }
873 #else /* Non LFN configuration */
874 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
875 break;
876 #endif
877 res = dir_next(dj, FALSE); /* Next entry */
878 } while (res == FR_OK);
879
880 return res;
881 }
882
883
884
885
886 /*-----------------------------------------------------------------------*/
887 /* Read an object from the directory */
888 /*-----------------------------------------------------------------------*/
889 #if _FS_MINIMIZE <= 1
890 static
891 FRESULT dir_read (
892 DIR *dj /* Pointer to the directory object that pointing the entry to be read */
893 )
894 {
895 FRESULT res;
896 BYTE c, *dir;
897 #if _USE_LFN
898 BYTE a, ord = 0xFF, sum = 0xFF;
899 #endif
900
901 res = FR_NO_FILE;
902 while (dj->sect) {
903 res = move_window(dj->fs, dj->sect);
904 if (res != FR_OK) break;
905 dir = dj->dir; /* Ptr to the directory entry of current index */
906 c = dir[DIR_Name];
907 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
908 #if _USE_LFN /* LFN configuration */
909 a = dir[DIR_Attr] & AM_MASK;
910 if (c == 0xE5 || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
911 ord = 0xFF;
912 } else {
913 if (a == AM_LFN) { /* An LFN entry is found */
914 if (c & 0x40) { /* Is it start of LFN sequence? */
915 sum = dir[LDIR_Chksum];
916 c &= 0xBF; ord = c;
917 dj->lfn_idx = dj->index;
918 }
919 /* Check LFN validity and capture it */
920 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
921 } else { /* An SFN entry is found */
922 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
923 dj->lfn_idx = 0xFFFF; /* It has no LFN. */
924 break;
925 }
926 }
927 #else /* Non LFN configuration */
928 if (c != 0xE5 && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
929 break;
930 #endif
931 res = dir_next(dj, FALSE); /* Next entry */
932 if (res != FR_OK) break;
933 }
934
935 if (res != FR_OK) dj->sect = 0;
936
937 return res;
938 }
939 #endif
940
941
942
943 /*-----------------------------------------------------------------------*/
944 /* Register an object to the directory */
945 /*-----------------------------------------------------------------------*/
946 #if !_FS_READONLY
947 static
948 FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
949 DIR *dj /* Target directory with object name to be created */
950 )
951 {
952 FRESULT res;
953 BYTE c, *dir;
954 #if _USE_LFN /* LFN configuration */
955 WORD n, ne, is;
956 BYTE sn[12], *fn, sum;
957 WCHAR *lfn;
958
959
960 fn = dj->fn; lfn = dj->lfn;
961 mem_cpy(sn, fn, 12);
962
963 if (_FS_RPATH && (sn[NS] & NS_DOT)) return FR_INVALID_NAME; /* Cannot create dot entry */
964
965 if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
966 fn[NS] = 0; dj->lfn = NULL; /* Find only SFN */
967 for (n = 1; n < 100; n++) {
968 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
969 res = dir_find(dj); /* Check if the name collides with existing SFN */
970 if (res != FR_OK) break;
971 }
972 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
973 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
974 fn[NS] = sn[NS]; dj->lfn = lfn;
975 }
976
977 if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve reserve an SFN + LFN entries. */
978 for (ne = 0; lfn[ne]; ne++) ;
979 ne = (ne + 25) / 13;
980 } else { /* Otherwise reserve only an SFN entry. */
981 ne = 1;
982 }
983
984 /* Reserve contiguous entries */
985 res = dir_seek(dj, 0);
986 if (res != FR_OK) return res;
987 n = is = 0;
988 do {
989 res = move_window(dj->fs, dj->sect);
990 if (res != FR_OK) break;
991 c = *dj->dir; /* Check the entry status */
992 if (c == 0xE5 || c == 0) { /* Is it a blank entry? */
993 if (n == 0) is = dj->index; /* First index of the contigulus entry */
994 if (++n == ne) break; /* A contiguous entry that requiered count is found */
995 } else {
996 n = 0; /* Not a blank entry. Restart to search */
997 }
998 res = dir_next(dj, TRUE); /* Next entry with table streach */
999 } while (res == FR_OK);
1000
1001 if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */
1002 res = dir_seek(dj, is);
1003 if (res == FR_OK) {
1004 sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */
1005 ne--;
1006 do { /* Store LFN entries in bottom first */
1007 res = move_window(dj->fs, dj->sect);
1008 if (res != FR_OK) break;
1009 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
1010 dj->fs->wflag = 1;
1011 res = dir_next(dj, FALSE); /* Next entry */
1012 } while (res == FR_OK && --ne);
1013 }
1014 }
1015
1016 #else /* Non LFN configuration */
1017 res = dir_seek(dj, 0);
1018 if (res == FR_OK) {
1019 do { /* Find a blank entry for the SFN */
1020 res = move_window(dj->fs, dj->sect);
1021 if (res != FR_OK) break;
1022 c = *dj->dir;
1023 if (c == 0xE5 || c == 0) break; /* Is it a blank entry? */
1024 res = dir_next(dj, TRUE); /* Next entry with table streach */
1025 } while (res == FR_OK);
1026 }
1027 #endif
1028
1029 if (res == FR_OK) { /* Initialize the SFN entry */
1030 res = move_window(dj->fs, dj->sect);
1031 if (res == FR_OK) {
1032 dir = dj->dir;
1033 mem_set(dir, 0, 32); /* Clean the entry */
1034 mem_cpy(dir, dj->fn, 11); /* Put SFN */
1035 dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */
1036 dj->fs->wflag = 1;
1037 }
1038 }
1039
1040 return res;
1041 }
1042 #endif /* !_FS_READONLY */
1043
1044
1045
1046
1047 /*-----------------------------------------------------------------------*/
1048 /* Remove an object from the directory */
1049 /*-----------------------------------------------------------------------*/
1050 #if !_FS_READONLY && !_FS_MINIMIZE
1051 static
1052 FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
1053 DIR *dj /* Directory object pointing the entry to be removed */
1054 )
1055 {
1056 FRESULT res;
1057 #if _USE_LFN /* LFN configuration */
1058 WORD i;
1059
1060 i = dj->index; /* SFN index */
1061 res = dir_seek(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
1062 if (res == FR_OK) {
1063 do {
1064 res = move_window(dj->fs, dj->sect);
1065 if (res != FR_OK) break;
1066 *dj->dir = 0xE5; /* Mark the entry "deleted" */
1067 dj->fs->wflag = 1;
1068 if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
1069 res = dir_next(dj, FALSE); /* Next entry */
1070 } while (res == FR_OK);
1071 if (res == FR_NO_FILE) res = FR_INT_ERR;
1072 }
1073
1074 #else /* Non LFN configuration */
1075 res = dir_seek(dj, dj->index);
1076 if (res == FR_OK) {
1077 res = move_window(dj->fs, dj->sect);
1078 if (res == FR_OK) {
1079 *dj->dir = 0xE5; /* Mark the entry "deleted" */
1080 dj->fs->wflag = 1;
1081 }
1082 }
1083 #endif
1084
1085 return res;
1086 }
1087 #endif /* !_FS_READONLY */
1088
1089
1090
1091
1092 /*-----------------------------------------------------------------------*/
1093 /* Pick a segment and create the object name in directory form */
1094 /*-----------------------------------------------------------------------*/
1095
1096 static
1097 FRESULT create_name (
1098 DIR *dj, /* Pointer to the directory object */
1099 const XCHAR **path /* Pointer to pointer to the segment in the path string */
1100 )
1101 {
1102 #ifdef _EXCVT
1103 static const BYTE cvt[] = _EXCVT;
1104 #endif
1105
1106 #if _USE_LFN /* LFN configuration */
1107 BYTE b, cf;
1108 WCHAR w, *lfn;
1109 int i, ni, si, di;
1110 const XCHAR *p;
1111
1112 /* Create LFN in Unicode */
1113 si = di = 0;
1114 p = *path;
1115 lfn = dj->lfn;
1116 for (;;) {
1117 w = p[si++]; /* Get a character */
1118 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
1119 if (di >= _MAX_LFN) /* Reject too long name */
1120 return FR_INVALID_NAME;
1121 #if !_LFN_UNICODE
1122 w &= 0xFF;
1123 if (IsDBCS1(w)) { /* If it is a DBC 1st byte */
1124 b = p[si++]; /* Get 2nd byte */
1125 if (!IsDBCS2(b)) /* Reject invalid code for DBC */
1126 return FR_INVALID_NAME;
1127 w = (w << 8) + b;
1128 }
1129 w = ff_convert(w, 1); /* Convert OEM to Unicode */
1130 if (!w) return FR_INVALID_NAME; /* Reject invalid code */
1131 #endif
1132 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
1133 return FR_INVALID_NAME;
1134 lfn[di++] = w; /* Store the Unicode char */
1135 }
1136 *path = &p[si]; /* Rerurn pointer to the next segment */
1137 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1138 #if _FS_RPATH
1139 if ((di == 1 && lfn[di - 1] == '.') || /* Is this a dot entry? */
1140 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) {
1141 lfn[di] = 0;
1142 for (i = 0; i < 11; i++)
1143 dj->fn[i] = (i < di) ? '.' : ' ';
1144 dj->fn[i] = cf | NS_DOT; /* This is a dot entry */
1145 return FR_OK;
1146 }
1147 #endif
1148 while (di) { /* Strip trailing spaces and dots */
1149 w = lfn[di - 1];
1150 if (w != ' ' && w != '.') break;
1151 di--;
1152 }
1153 if (!di) return FR_INVALID_NAME; /* Reject null string */
1154
1155 lfn[di] = 0; /* LFN is created */
1156
1157 /* Create SFN in directory form */
1158 mem_set(dj->fn, ' ', 11);
1159 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
1160 if (si) cf |= NS_LOSS | NS_LFN;
1161 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
1162
1163 b = i = 0; ni = 8;
1164 for (;;) {
1165 w = lfn[si++]; /* Get an LFN char */
1166 if (!w) break; /* Break on enf of the LFN */
1167 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
1168 cf |= NS_LOSS | NS_LFN; continue;
1169 }
1170
1171 if (i >= ni || si == di) { /* Extension or end of SFN */
1172 if (ni == 11) { /* Long extension */
1173 cf |= NS_LOSS | NS_LFN; break;
1174 }
1175 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
1176 if (si > di) break; /* No extension */
1177 si = di; i = 8; ni = 11; /* Enter extension section */
1178 b <<= 2; continue;
1179 }
1180
1181 if (w >= 0x80) { /* Non ASCII char */
1182 #ifdef _EXCVT
1183 w = ff_convert(w, 0); /* Unicode -> OEM code */
1184 if (w) w = cvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
1185 #else
1186 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
1187 #endif
1188 cf |= NS_LFN; /* Force create LFN entry */
1189 }
1190
1191 if (_DF1S && w >= 0x100) { /* Double byte char */
1192 if (i >= ni - 1) {
1193 cf |= NS_LOSS | NS_LFN; i = ni; continue;
1194 }
1195 dj->fn[i++] = (BYTE)(w >> 8);
1196 } else { /* Single byte char */
1197 if (!w || chk_chr("+,;[=]", w)) { /* Replace illegal chars for SFN */
1198 w = '_'; cf |= NS_LOSS | NS_LFN; /* Lossy conversion */
1199 } else {
1200 if (IsUpper(w)) { /* ASCII large capital */
1201 b |= 2;
1202 } else {
1203 if (IsLower(w)) { /* ASCII small capital */
1204 b |= 1; w -= 0x20;
1205 }
1206 }
1207 }
1208 }
1209 dj->fn[i++] = (BYTE)w;
1210 }
1211
1212 if (dj->fn[0] == 0xE5) dj->fn[0] = 0x05; /* If the first char collides with deleted mark, replace it with 0x05 */
1213
1214 if (ni == 8) b <<= 2;
1215 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
1216 cf |= NS_LFN;
1217 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */
1218 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
1219 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
1220 }
1221
1222 dj->fn[NS] = cf; /* SFN is created */
1223
1224 return FR_OK;
1225
1226
1227 #else /* Non-LFN configuration */
1228 BYTE b, c, d, *sfn;
1229 int ni, si, i;
1230 const char *p;
1231
1232 /* Create file name in directory form */
1233 sfn = dj->fn;
1234 mem_set(sfn, ' ', 11);
1235 si = i = b = 0; ni = 8;
1236 p = *path;
1237 #if _FS_RPATH
1238 if (p[si] == '.') { /* Is this a dot entry? */
1239 for (;;) {
1240 c = p[si++];
1241 if (c != '.' || si >= 3) break;
1242 sfn[i++] = c;
1243 }
1244 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
1245 *path = &p[si]; /* Rerurn pointer to the next segment */
1246 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
1247 return FR_OK;
1248 }
1249 #endif
1250 for (;;) {
1251 c = p[si++];
1252 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
1253 if (c == '.' || i >= ni) {
1254 if (ni != 8 || c != '.') return FR_INVALID_NAME;
1255 i = 8; ni = 11;
1256 b <<= 2; continue;
1257 }
1258 if (c >= 0x80) { /* Extended char */
1259 #ifdef _EXCVT
1260 c = cvt[c - 0x80]; /* Convert extend char (SBCS) */
1261 #else
1262 b |= 3; /* Eliminate NT flag if ext char is exist */
1263 #if !_DF1S /* ASCII only cfg */
1264 return FR_INVALID_NAME;
1265 #endif
1266 #endif
1267 }
1268 if (IsDBCS1(c)) { /* DBC 1st byte? */
1269 d = p[si++]; /* Get 2nd byte */
1270 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
1271 return FR_INVALID_NAME;
1272 sfn[i++] = c;
1273 sfn[i++] = d;
1274 } else { /* Single byte code */
1275 if (chk_chr(" \"*+,[=]|\x7F", c)) /* Reject illegal chrs for SFN */
1276 return FR_INVALID_NAME;
1277 if (IsUpper(c)) { /* ASCII large capital? */
1278 b |= 2;
1279 } else {
1280 if (IsLower(c)) { /* ASCII small capital? */
1281 b |= 1; c -= 0x20;
1282 }
1283 }
1284 sfn[i++] = c;
1285 }
1286 }
1287 *path = &p[si]; /* Rerurn pointer to the next segment */
1288 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1289
1290 if (!i) return FR_INVALID_NAME; /* Reject null string */
1291 if (sfn[0] == 0xE5) sfn[0] = 0x05; /* When first char collides with 0xE5, replace it with 0x05 */
1292
1293 if (ni == 8) b <<= 2;
1294 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Extension has only small capital) */
1295 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Filename has only small capital) */
1296
1297 sfn[NS] = c; /* Store NT flag, File name is created */
1298
1299 return FR_OK;
1300 #endif
1301 }
1302
1303
1304
1305
1306 /*-----------------------------------------------------------------------*/
1307 /* Get file information from directory entry */
1308 /*-----------------------------------------------------------------------*/
1309 #if _FS_MINIMIZE <= 1
1310 static
1311 void get_fileinfo ( /* No return code */
1312 DIR *dj, /* Pointer to the directory object */
1313 FILINFO *fno /* Pointer to the file information to be filled */
1314 )
1315 {
1316 int i;
1317 BYTE c, nt, *dir;
1318 char *p;
1319
1320
1321 p = fno->fname;
1322 if (dj->sect) {
1323 dir = dj->dir;
1324 nt = dir[DIR_NTres]; /* NT flag */
1325 for (i = 0; i < 8; i++) { /* Copy name body */
1326 c = dir[i];
1327 if (c == ' ') break;
1328 if (c == 0x05) c = 0xE5;
1329 if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
1330 *p++ = c;
1331 }
1332 if (dir[8] != ' ') { /* Copy name extension */
1333 *p++ = '.';
1334 for (i = 8; i < 11; i++) {
1335 c = dir[i];
1336 if (c == ' ') break;
1337 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
1338 *p++ = c;
1339 }
1340 }
1341 fno->fattrib = dir[DIR_Attr]; /* Attribute */
1342 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
1343 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
1344 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
1345 }
1346 *p = 0;
1347
1348 #if _USE_LFN
1349 if (fno->lfname) {
1350 XCHAR *tp = fno->lfname;
1351 WCHAR w, *lfn;
1352
1353 i = 0;
1354 if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
1355 lfn = dj->lfn;
1356 while ((w = *lfn++) != 0) { /* Get an LFN char */
1357 #if !_LFN_UNICODE
1358 w = ff_convert(w, 0); /* Unicode -> OEM conversion */
1359 if (!w) { i = 0; break; } /* Could not convert, no LFN */
1360 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC */
1361 tp[i++] = (XCHAR)(w >> 8);
1362 #endif
1363 if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overrun, no LFN */
1364 tp[i++] = (XCHAR)w;
1365 }
1366 }
1367 tp[i] = 0; /* Terminator */
1368 }
1369 #endif
1370 }
1371 #endif /* _FS_MINIMIZE <= 1 */
1372
1373
1374
1375
1376 /*-----------------------------------------------------------------------*/
1377 /* Follow a file path */
1378 /*-----------------------------------------------------------------------*/
1379
1380 static
1381 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
1382 DIR *dj, /* Directory object to return last directory and found object */
1383 const XCHAR *path /* Full-path string to find a file or directory */
1384 )
1385 {
1386 FRESULT res;
1387 BYTE *dir, last;
1388
1389
1390 while (!_USE_LFN && *path == ' ') path++; /* Skip leading spaces */
1391 #if _FS_RPATH
1392 if (*path == '/' || *path == '\\') { /* There is a heading separator */
1393 path++; dj->sclust = 0; /* Strip it and start from the root dir */
1394 } else { /* No heading saparator */
1395 dj->sclust = dj->fs->cdir; /* Start from the current dir */
1396 }
1397 #else
1398 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
1399 path++;
1400 dj->sclust = 0; /* Start from the root dir */
1401 #endif
1402
1403 if ((UINT)*path < ' ') { /* Null path means the start directory itself */
1404 res = dir_seek(dj, 0);
1405 dj->dir = NULL;
1406
1407 } else { /* Follow path */
1408 for (;;) {
1409 res = create_name(dj, &path); /* Get a segment */
1410 if (res != FR_OK) break;
1411 res = dir_find(dj); /* Find it */
1412 last = *(dj->fn+NS) & NS_LAST;
1413 if (res != FR_OK) { /* Could not find the object */
1414 if (res == FR_NO_FILE && !last)
1415 res = FR_NO_PATH;
1416 break;
1417 }
1418 if (last) break; /* Last segment match. Function completed. */
1419 dir = dj->dir; /* There is next segment. Follow the sub directory */
1420 if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
1421 res = FR_NO_PATH; break;
1422 }
1423 dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
1424 }
1425 }
1426
1427 return res;
1428 }
1429
1430
1431
1432
1433 /*-----------------------------------------------------------------------*/
1434 /* Load boot record and check if it is an FAT boot record */
1435 /*-----------------------------------------------------------------------*/
1436
1437 static
1438 BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */
1439 FATFS *fs, /* File system object */
1440 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
1441 )
1442 {
1443 if (disk_read(fs->drive, fs->win, sect, 1) != RES_OK) /* Load boot record */
1444 return 3;
1445 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
1446 return 2;
1447
1448 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
1449 return 0;
1450 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
1451 return 0;
1452
1453 return 1;
1454 }
1455
1456
1457
1458
1459 /*-----------------------------------------------------------------------*/
1460 /* Make sure that the file system is valid */
1461 /*-----------------------------------------------------------------------*/
1462
1463
1464 FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occured */
1465 const XCHAR **path, /* Pointer to pointer to the path name (drive number) */
1466 FATFS **rfs, /* Pointer to pointer to the found file system object */
1467 BYTE chk_wp /* !=0: Check media write protection for write access */
1468 )
1469 {
1470 BYTE fmt, *tbl;
1471 UINT vol;
1472 DSTATUS stat;
1473 DWORD bsect, fsize, tsect, mclst;
1474 const XCHAR *p = *path;
1475 FATFS *fs;
1476
1477 /* Get logical drive number from the path name */
1478 vol = p[0] - '0'; /* Is there a drive number? */
1479 if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */
1480 p += 2; *path = p; /* Return pointer to the path name */
1481 } else { /* No drive number is given */
1482 #if _FS_RPATH
1483 vol = Drive; /* Use current drive */
1484 #else
1485 vol = 0; /* Use drive 0 */
1486 #endif
1487 }
1488
1489 /* Check if the logical drive is valid or not */
1490 if (vol >= _DRIVES) /* Is the drive number valid? */
1491 return FR_INVALID_DRIVE;
1492 *rfs = fs = FatFs[vol]; /* Returen pointer to the corresponding file system object */
1493 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
1494
1495 ENTER_FF(fs); /* Lock file system */
1496
1497 if (fs->fs_type) { /* If the logical drive has been mounted */
1498 stat = disk_status(fs->drive);
1499 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */
1500 #if !_FS_READONLY
1501 if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
1502 return FR_WRITE_PROTECTED;
1503 #endif
1504 return FR_OK; /* The file system object is valid */
1505 }
1506 }
1507
1508 /* The logical drive must be mounted. Following code attempts to mount the volume */
1509
1510 fs->fs_type = 0; /* Clear the file system object */
1511 fs->drive = (BYTE)LD2PD(vol); /* Bind the logical drive and a physical drive */
1512 stat = disk_initialize(fs->drive); /* Initialize low level disk I/O layer */
1513 if (stat & STA_NOINIT) /* Check if the drive is ready */
1514 return FR_NOT_READY;
1515 #if _MAX_SS != 512 /* Get disk sector size if needed */
1516 if (disk_ioctl(fs->drive, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
1517 return FR_NO_FILESYSTEM;
1518 #endif
1519 #if !_FS_READONLY
1520 if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */
1521 return FR_WRITE_PROTECTED;
1522 #endif
1523 /* Search FAT partition on the drive */
1524 fmt = check_fs(fs, bsect = 0); /* Check sector 0 as an SFD format */
1525 if (fmt == 1) { /* Not an FAT boot record, it may be patitioned */
1526 /* Check a partition listed in top of the partition table */
1527 tbl = &fs->win[MBR_Table + LD2PT(vol) * 16]; /* Partition table */
1528 if (tbl[4]) { /* Is the partition existing? */
1529 bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
1530 fmt = check_fs(fs, bsect); /* Check the partition */
1531 }
1532 }
1533 if (fmt == 3) return FR_DISK_ERR;
1534 if (fmt || LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* No valid FAT patition is found */
1535 return FR_NO_FILESYSTEM;
1536
1537 /* Initialize the file system object */
1538 fsize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
1539 if (!fsize) fsize = LD_DWORD(fs->win+BPB_FATSz32);
1540 fs->sects_fat = fsize;
1541 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
1542 fsize *= fs->n_fats; /* (Number of sectors in FAT area) */
1543 fs->fatbase = bsect + LD_WORD(fs->win+BPB_RsvdSecCnt); /* FAT start sector (lba) */
1544 fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
1545 fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Nmuber of root directory entries */
1546 tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
1547 if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
1548 fs->max_clust = mclst = (tsect /* Last cluster# + 1 (Number of clusters + 2) */
1549 - LD_WORD(fs->win+BPB_RsvdSecCnt) - fsize - fs->n_rootdir / (SS(fs)/32)
1550 ) / fs->csize + 2;
1551
1552 fmt = FS_FAT12; /* Determine the FAT sub type */
1553 if (mclst >= 0xFF7) fmt = FS_FAT16; /* Number of clusters >= 0xFF5 */
1554 if (mclst >= 0xFFF7) fmt = FS_FAT32; /* Number of clusters >= 0xFFF5 */
1555
1556 if (fmt == FS_FAT32)
1557 fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
1558 else
1559 fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */
1560 fs->database = fs->fatbase + fsize + fs->n_rootdir / (SS(fs)/32); /* Data start sector (lba) */
1561
1562 #if !_FS_READONLY
1563 /* Initialize allocation information */
1564 fs->free_clust = 0xFFFFFFFF;
1565 fs->wflag = 0;
1566 /* Get fsinfo if needed */
1567 if (fmt == FS_FAT32) {
1568 fs->fsi_flag = 0;
1569 fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
1570 if (disk_read(fs->drive, fs->win, fs->fsi_sector, 1) == RES_OK &&
1571 LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
1572 LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
1573 LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
1574 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
1575 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
1576 }
1577 }
1578 #endif
1579 fs->fs_type = fmt; /* FAT sub-type */
1580 fs->winsect = 0; /* Invalidate sector cache */
1581 #if _FS_RPATH
1582 fs->cdir = 0; /* Current directory (root dir) */
1583 #endif
1584 fs->id = ++Fsid; /* File system mount ID */
1585
1586 return FR_OK;
1587 }
1588
1589
1590
1591
1592 /*-----------------------------------------------------------------------*/
1593 /* Check if the file/dir object is valid or not */
1594 /*-----------------------------------------------------------------------*/
1595
1596 static
1597 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
1598 FATFS *fs, /* Pointer to the file system object */
1599 WORD id /* Member id of the target object to be checked */
1600 )
1601 {
1602 if (!fs || !fs->fs_type || fs->id != id)
1603 return FR_INVALID_OBJECT;
1604
1605 ENTER_FF(fs); /* Lock file system */
1606
1607 if (disk_status(fs->drive) & STA_NOINIT)
1608 return FR_NOT_READY;
1609
1610 return FR_OK;
1611 }
1612
1613
1614
1615
1616 /*--------------------------------------------------------------------------
1617
1618 Public Functions
1619
1620 --------------------------------------------------------------------------*/
1621
1622
1623
1624 /*-----------------------------------------------------------------------*/
1625 /* Mount/Unmount a Locical Drive */
1626 /*-----------------------------------------------------------------------*/
1627
1628 FRESULT f_mount (
1629 BYTE vol, /* Logical drive number to be mounted/unmounted */
1630 FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
1631 )
1632 {
1633 FATFS *rfs;
1634
1635
1636 if (vol >= _DRIVES) /* Check if the drive number is valid */
1637 return FR_INVALID_DRIVE;
1638 rfs = FatFs[vol]; /* Get current fs object */
1639
1640 if (rfs) {
1641 #if _FS_REENTRANT /* Discard sync object of the current volume */
1642 if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
1643 #endif
1644 rfs->fs_type = 0; /* Clear old fs object */
1645 }
1646
1647 if (fs) {
1648 fs->fs_type = 0; /* Clear new fs object */
1649 #if _FS_REENTRANT /* Create sync object for the new volume */
1650 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
1651 #endif
1652 }
1653 FatFs[vol] = fs; /* Register new fs object */
1654
1655 return FR_OK;
1656 }
1657
1658
1659
1660
1661 /*-----------------------------------------------------------------------*/
1662 /* Open or Create a File */
1663 /*-----------------------------------------------------------------------*/
1664
1665 FRESULT f_open (
1666 FIL *fp, /* Pointer to the blank file object */
1667 const XCHAR *path, /* Pointer to the file name */
1668 BYTE mode /* Access mode and file open mode flags */
1669 )
1670 {
1671 FRESULT res;
1672 DIR dj;
1673 NAMEBUF(sfn, lfn);
1674 BYTE *dir;
1675
1676
1677 fp->fs = NULL; /* Clear file object */
1678 #if !_FS_READONLY
1679 mode &= (FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW);
1680 res = chk_mounted(&path, &dj.fs, (BYTE)(mode & (FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)));
1681 #else
1682 mode &= FA_READ;
1683 res = chk_mounted(&path, &dj.fs, 0);
1684 #endif
1685 if (res != FR_OK) LEAVE_FF(dj.fs, res);
1686 INITBUF(dj, sfn, lfn);
1687 res = follow_path(&dj, path); /* Follow the file path */
1688
1689 #if !_FS_READONLY
1690 /* Create or Open a file */
1691 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
1692 DWORD ps, cl;
1693
1694 if (res != FR_OK) { /* No file, create new */
1695 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
1696 res = dir_register(&dj);
1697 if (res != FR_OK) LEAVE_FF(dj.fs, res);
1698 mode |= FA_CREATE_ALWAYS;
1699 dir = dj.dir; /* Created entry (SFN entry) */
1700 }
1701 else { /* Any object is already existing */
1702 if (mode & FA_CREATE_NEW) /* Cannot create new */
1703 LEAVE_FF(dj.fs, FR_EXIST);
1704 dir = dj.dir;
1705 if (!dir || (dir[DIR_Attr] & (AM_RDO | AM_DIR))) /* Cannot overwrite it (R/O or DIR) */
1706 LEAVE_FF(dj.fs, FR_DENIED);
1707 if (mode & FA_CREATE_ALWAYS) { /* Resize it to zero on over write mode */
1708 cl = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO); /* Get start cluster */
1709 ST_WORD(dir+DIR_FstClusHI, 0); /* cluster = 0 */
1710 ST_WORD(dir+DIR_FstClusLO, 0);
1711 ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */
1712 dj.fs->wflag = 1;
1713 ps = dj.fs->winsect; /* Remove the cluster chain */
1714 if (cl) {
1715 res = remove_chain(dj.fs, cl);
1716 if (res) LEAVE_FF(dj.fs, res);
1717 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
1718 }
1719 res = move_window(dj.fs, ps);
1720 if (res != FR_OK) LEAVE_FF(dj.fs, res);
1721 }
1722 }
1723 if (mode & FA_CREATE_ALWAYS) {
1724 dir[DIR_Attr] = 0; /* Reset attribute */
1725 ps = get_fattime();
1726 ST_DWORD(dir+DIR_CrtTime, ps); /* Created time */
1727 dj.fs->wflag = 1;
1728 mode |= FA__WRITTEN; /* Set file changed flag */
1729 }
1730 }
1731 /* Open an existing file */
1732 else {
1733 #endif /* !_FS_READONLY */
1734 if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
1735 dir = dj.dir;
1736 if (!dir || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */
1737 LEAVE_FF(dj.fs, FR_NO_FILE);
1738 #if !_FS_READONLY
1739 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
1740 LEAVE_FF(dj.fs, FR_DENIED);
1741 }
1742 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
1743 fp->dir_ptr = dj.dir;
1744 #endif
1745 fp->flag = mode; /* File access mode */
1746 fp->org_clust = /* File start cluster */
1747 ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
1748 fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
1749 fp->fptr = 0; fp->csect = 255; /* File pointer */
1750 fp->dsect = 0;
1751 fp->fs = dj.fs; fp->id = dj.fs->id; /* Owner file system object of the file */
1752
1753 LEAVE_FF(dj.fs, FR_OK);
1754 }
1755
1756
1757
1758
1759 /*-----------------------------------------------------------------------*/
1760 /* Read File */
1761 /*-----------------------------------------------------------------------*/
1762
1763 FRESULT f_read (
1764 FIL *fp, /* Pointer to the file object */
1765 void *buff, /* Pointer to data buffer */
1766 UINT btr, /* Number of bytes to read */
1767 UINT *br /* Pointer to number of bytes read */
1768 )
1769 {
1770 FRESULT res;
1771 DWORD clst, sect, remain;
1772 UINT rcnt, cc;
1773 BYTE *rbuff = buff;
1774
1775
1776 *br = 0; /* Initialize bytes read */
1777
1778 res = validate(fp->fs, fp->id); /* Check validity of the object */
1779 if (res != FR_OK) LEAVE_FF(fp->fs, res);
1780 if (fp->flag & FA__ERROR) /* Check abort flag */
1781 LEAVE_FF(fp->fs, FR_INT_ERR);
1782 if (!(fp->flag & FA_READ)) /* Check access mode */
1783 LEAVE_FF(fp->fs, FR_DENIED);
1784 remain = fp->fsize - fp->fptr;
1785 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
1786
1787 for ( ; btr; /* Repeat until all data transferred */
1788 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
1789 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
1790 if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
1791 clst = (fp->fptr == 0) ? /* On the top of the file? */
1792 fp->org_clust : get_fat(fp->fs, fp->curr_clust);
1793 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
1794 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
1795 fp->curr_clust = clst; /* Update current cluster */
1796 fp->csect = 0; /* Reset sector offset in the cluster */
1797 }
1798 sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
1799 if (!sect) ABORT(fp->fs, FR_INT_ERR);
1800 sect += fp->csect;
1801 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
1802 if (cc) { /* Read maximum contiguous sectors directly */
1803 if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
1804 cc = fp->fs->csize - fp->csect;
1805 if (disk_read(fp->fs->drive, rbuff, sect, (BYTE)cc) != RES_OK)
1806 ABORT(fp->fs, FR_DISK_ERR);
1807 #if !_FS_READONLY && _FS_MINIMIZE <= 2
1808 #if _FS_TINY
1809 if (fp->fs->wflag && fp->fs->winsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */
1810 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
1811 #else
1812 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */
1813 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
1814 #endif
1815 #endif
1816 fp->csect += (BYTE)cc; /* Next sector address in the cluster */
1817 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
1818 continue;
1819 }
1820 #if !_FS_TINY
1821 #if !_FS_READONLY
1822 if (fp->flag & FA__DIRTY) { /* Write sector I/O buffer if needed */
1823 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
1824 ABORT(fp->fs, FR_DISK_ERR);
1825 fp->flag &= ~FA__DIRTY;
1826 }
1827 #endif
1828 if (fp->dsect != sect) { /* Fill sector buffer with file data */
1829 if (disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
1830 ABORT(fp->fs, FR_DISK_ERR);
1831 }
1832 #endif
1833 fp->dsect = sect;
1834 fp->csect++; /* Next sector address in the cluster */
1835 }
1836 rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
1837 if (rcnt > btr) rcnt = btr;
1838 #if _FS_TINY
1839 if (move_window(fp->fs, fp->dsect)) /* Move sector window */
1840 ABORT(fp->fs, FR_DISK_ERR);
1841 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
1842 #else
1843 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
1844 #endif
1845 }
1846
1847 LEAVE_FF(fp->fs, FR_OK);
1848 }
1849
1850
1851
1852
1853 #if !_FS_READONLY
1854 /*-----------------------------------------------------------------------*/
1855 /* Write File */
1856 /*-----------------------------------------------------------------------*/
1857
1858 FRESULT f_write (
1859 FIL *fp, /* Pointer to the file object */
1860 const void *buff, /* Pointer to the data to be written */
1861 UINT btw, /* Number of bytes to write */
1862 UINT *bw /* Pointer to number of bytes written */
1863 )
1864 {
1865 FRESULT res;
1866 DWORD clst, sect;
1867 UINT wcnt, cc;
1868 const BYTE *wbuff = buff;
1869
1870
1871 *bw = 0; /* Initialize bytes written */
1872
1873 res = validate(fp->fs, fp->id); /* Check validity of the object */
1874 if (res != FR_OK) LEAVE_FF(fp->fs, res);
1875 if (fp->flag & FA__ERROR) /* Check abort flag */
1876 LEAVE_FF(fp->fs, FR_INT_ERR);
1877 if (!(fp->flag & FA_WRITE)) /* Check access mode */
1878 LEAVE_FF(fp->fs, FR_DENIED);
1879 if (fp->fsize + btw < fp->fsize) btw = 0; /* File size cannot reach 4GB */
1880
1881 for ( ; btw; /* Repeat until all data transferred */
1882 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
1883 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
1884 if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
1885 if (fp->fptr == 0) { /* On the top of the file? */
1886 clst = fp->org_clust; /* Follow from the origin */
1887 if (clst == 0) /* When there is no cluster chain, */
1888 fp->org_clust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
1889 } else { /* Middle or end of the file */
1890 clst = create_chain(fp->fs, fp->curr_clust); /* Follow or streach cluster chain */
1891 }
1892 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
1893 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
1894 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
1895 fp->curr_clust = clst; /* Update current cluster */
1896 fp->csect = 0; /* Reset sector address in the cluster */
1897 }
1898 #if _FS_TINY
1899 if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write back data buffer prior to following direct transfer */
1900 ABORT(fp->fs, FR_DISK_ERR);
1901 #else
1902 if (fp->flag & FA__DIRTY) { /* Write back data buffer prior to following direct transfer */
1903 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
1904 ABORT(fp->fs, FR_DISK_ERR);
1905 fp->flag &= ~FA__DIRTY;
1906 }
1907 #endif
1908 sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
1909 if (!sect) ABORT(fp->fs, FR_INT_ERR);
1910 sect += fp->csect;
1911 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
1912 if (cc) { /* Write maximum contiguous sectors directly */
1913 if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
1914 cc = fp->fs->csize - fp->csect;
1915 if (disk_write(fp->fs->drive, wbuff, sect, (BYTE)cc) != RES_OK)
1916 ABORT(fp->fs, FR_DISK_ERR);
1917 #if _FS_TINY
1918 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
1919 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
1920 fp->fs->wflag = 0;
1921 }
1922 #else
1923 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
1924 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
1925 fp->flag &= ~FA__DIRTY;
1926 }
1927 #endif
1928 fp->csect += (BYTE)cc; /* Next sector address in the cluster */
1929 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
1930 continue;
1931 }
1932 #if _FS_TINY
1933 if (fp->fptr >= fp->fsize) { /* Avoid silly buffer filling at growing edge */
1934 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
1935 fp->fs->winsect = sect;
1936 }
1937 #else
1938 if (fp->dsect != sect) { /* Fill sector buffer with file data */
1939 if (fp->fptr < fp->fsize &&
1940 disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
1941 ABORT(fp->fs, FR_DISK_ERR);
1942 }
1943 #endif
1944 fp->dsect = sect;
1945 fp->csect++; /* Next sector address in the cluster */
1946 }
1947 wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Put partial sector into file I/O buffer */
1948 if (wcnt > btw) wcnt = btw;
1949 #if _FS_TINY
1950 if (move_window(fp->fs, fp->dsect)) /* Move sector window */
1951 ABORT(fp->fs, FR_DISK_ERR);
1952 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
1953 fp->fs->wflag = 1;
1954 #else
1955 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
1956 fp->flag |= FA__DIRTY;
1957 #endif
1958 }
1959
1960 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
1961 fp->flag |= FA__WRITTEN; /* Set file changed flag */
1962
1963 LEAVE_FF(fp->fs, FR_OK);
1964 }
1965
1966
1967
1968
1969 /*-----------------------------------------------------------------------*/
1970 /* Synchronize the File Object */
1971 /*-----------------------------------------------------------------------*/
1972
1973 FRESULT f_sync (
1974 FIL *fp /* Pointer to the file object */
1975 )
1976 {
1977 FRESULT res;
1978 DWORD tim;
1979 BYTE *dir;
1980
1981
1982 res = validate(fp->fs, fp->id); /* Check validity of the object */
1983 if (res == FR_OK) {
1984 if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
1985 #if !_FS_TINY /* Write-back dirty buffer */
1986 if (fp->flag & FA__DIRTY) {
1987 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
1988 LEAVE_FF(fp->fs, FR_DISK_ERR);
1989 fp->flag &= ~FA__DIRTY;
1990 }
1991 #endif
1992 /* Update the directory entry */
1993 res = move_window(fp->fs, fp->dir_sect);
1994 if (res == FR_OK) {
1995 dir = fp->dir_ptr;
1996 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
1997 ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
1998 ST_WORD(dir+DIR_FstClusLO, fp->org_clust); /* Update start cluster */
1999 ST_WORD(dir+DIR_FstClusHI, fp->org_clust >> 16);
2000 tim = get_fattime(); /* Updated time */
2001 ST_DWORD(dir+DIR_WrtTime, tim);
2002 fp->flag &= ~FA__WRITTEN;
2003 fp->fs->wflag = 1;
2004 res = sync(fp->fs);
2005 }
2006 }
2007 }
2008
2009 LEAVE_FF(fp->fs, res);
2010 }
2011
2012 #endif /* !_FS_READONLY */
2013
2014
2015
2016
2017 /*-----------------------------------------------------------------------*/
2018 /* Close File */
2019 /*-----------------------------------------------------------------------*/
2020
2021 FRESULT f_close (
2022 FIL *fp /* Pointer to the file object to be closed */
2023 )
2024 {
2025 FRESULT res;
2026
2027
2028 #if _FS_READONLY
2029 res = validate(fp->fs, fp->id);
2030 if (res == FR_OK) fp->fs = NULL;
2031 LEAVE_FF(fp->fs, res);
2032 #else
2033 res = f_sync(fp);
2034 if (res == FR_OK) fp->fs = NULL;
2035 return res;
2036 #endif
2037 }
2038
2039
2040
2041
2042 /*-----------------------------------------------------------------------*/
2043 /* Change Current Drive/Directory */
2044 /*-----------------------------------------------------------------------*/
2045
2046 #if _FS_RPATH
2047
2048 FRESULT f_chdrive (
2049 BYTE drv /* Drive number */
2050 )
2051 {
2052 if (drv >= _DRIVES) return FR_INVALID_DRIVE;
2053
2054 Drive = drv;
2055
2056 return FR_OK;
2057 }
2058
2059
2060
2061
2062 FRESULT f_chdir (
2063 const XCHAR *path /* Pointer to the directory path */
2064 )
2065 {
2066 FRESULT res;
2067 DIR dj;
2068 NAMEBUF(sfn, lfn);
2069 BYTE *dir;
2070
2071
2072 res = chk_mounted(&path, &dj.fs, 0);
2073 if (res == FR_OK) {
2074 INITBUF(dj, sfn, lfn);
2075 res = follow_path(&dj, path); /* Follow the file path */
2076 if (res == FR_OK) { /* Follow completed */
2077 dir = dj.dir; /* Pointer to the entry */
2078 if (!dir) {
2079 dj.fs->cdir = 0; /* No entry (root dir) */
2080 } else {
2081 if (dir[DIR_Attr] & AM_DIR) /* Reached to the dir */
2082 dj.fs->cdir = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
2083 else
2084 res = FR_NO_PATH; /* Could not reach the dir (it is a file) */
2085 }
2086 }
2087 if (res == FR_NO_FILE) res = FR_NO_PATH;
2088 }
2089
2090 LEAVE_FF(dj.fs, res);
2091 }
2092
2093 #endif
2094
2095
2096
2097 #if _FS_MINIMIZE <= 2
2098 /*-----------------------------------------------------------------------*/
2099 /* Seek File R/W Pointer */
2100 /*-----------------------------------------------------------------------*/
2101
2102 FRESULT f_lseek (
2103 FIL *fp, /* Pointer to the file object */
2104 DWORD ofs /* File pointer from top of file */
2105 )
2106 {
2107 FRESULT res;
2108 DWORD clst, bcs, nsect, ifptr;
2109
2110
2111 res = validate(fp->fs, fp->id); /* Check validity of the object */
2112 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2113 if (fp->flag & FA__ERROR) /* Check abort flag */
2114 LEAVE_FF(fp->fs, FR_INT_ERR);
2115 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
2116 #if !_FS_READONLY
2117 && !(fp->flag & FA_WRITE)
2118 #endif
2119 ) ofs = fp->fsize;
2120
2121 ifptr = fp->fptr;
2122 fp->fptr = nsect = 0; fp->csect = 255;
2123 if (ofs > 0) {
2124 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
2125 if (ifptr > 0 &&
2126 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
2127 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
2128 ofs -= fp->fptr;
2129 clst = fp->curr_clust;
2130 } else { /* When seek to back cluster, */
2131 clst = fp->org_clust; /* start from the first cluster */
2132 #if !_FS_READONLY
2133 if (clst == 0) { /* If no cluster chain, create a new chain */
2134 clst = create_chain(fp->fs, 0);
2135 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2136 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2137 fp->org_clust = clst;
2138 }
2139 #endif
2140 fp->curr_clust = clst;
2141 }
2142 if (clst != 0) {
2143 while (ofs > bcs) { /* Cluster following loop */
2144 #if !_FS_READONLY
2145 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
2146 clst = create_chain(fp->fs, clst); /* Force streached if in write mode */
2147 if (clst == 0) { /* When disk gets full, clip file size */
2148 ofs = bcs; break;
2149 }
2150 } else
2151 #endif
2152 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
2153 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2154 if (clst <= 1 || clst >= fp->fs->max_clust) ABORT(fp->fs, FR_INT_ERR);
2155 fp->curr_clust = clst;
2156 fp->fptr += bcs;
2157 ofs -= bcs;
2158 }
2159 fp->fptr += ofs;
2160 fp->csect = (BYTE)(ofs / SS(fp->fs)); /* Sector offset in the cluster */
2161 if (ofs % SS(fp->fs)) {
2162 nsect = clust2sect(fp->fs, clst); /* Current sector */
2163 if (!nsect) ABORT(fp->fs, FR_INT_ERR);
2164 nsect += fp->csect;
2165 fp->csect++;
2166 }
2167 }
2168 }
2169 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {
2170 #if !_FS_TINY
2171 #if !_FS_READONLY
2172 if (fp->flag & FA__DIRTY) { /* Write-back dirty buffer if needed */
2173 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
2174 ABORT(fp->fs, FR_DISK_ERR);
2175 fp->flag &= ~FA__DIRTY;
2176 }
2177 #endif
2178 if (disk_read(fp->fs->drive, fp->buf, nsect, 1) != RES_OK)
2179 ABORT(fp->fs, FR_DISK_ERR);
2180 #endif
2181 fp->dsect = nsect;
2182 }
2183 #if !_FS_READONLY
2184 if (fp->fptr > fp->fsize) { /* Set changed flag if the file size is extended */
2185 fp->fsize = fp->fptr;
2186 fp->flag |= FA__WRITTEN;
2187 }
2188 #endif
2189
2190 LEAVE_FF(fp->fs, res);
2191 }
2192
2193
2194
2195
2196 #if _FS_MINIMIZE <= 1
2197 /*-----------------------------------------------------------------------*/
2198 /* Create a Directroy Object */
2199 /*-----------------------------------------------------------------------*/
2200
2201 FRESULT f_opendir (
2202 DIR *dj, /* Pointer to directory object to create */
2203 const XCHAR *path /* Pointer to the directory path */
2204 )
2205 {
2206 FRESULT res;
2207 NAMEBUF(sfn, lfn);
2208 BYTE *dir;
2209
2210
2211 res = chk_mounted(&path, &dj->fs, 0);
2212 if (res == FR_OK) {
2213 INITBUF((*dj), sfn, lfn);
2214 res = follow_path(dj, path); /* Follow the path to the directory */
2215 if (res == FR_OK) { /* Follow completed */
2216 dir = dj->dir;
2217 if (dir) { /* It is not the root dir */
2218 if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
2219 dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
2220 } else { /* The object is not a directory */
2221 res = FR_NO_PATH;
2222 }
2223 }
2224 if (res == FR_OK) {
2225 dj->id = dj->fs->id;
2226 res = dir_seek(dj, 0); /* Rewind dir */
2227 }
2228 }
2229 if (res == FR_NO_FILE) res = FR_NO_PATH;
2230 }
2231
2232 LEAVE_FF(dj->fs, res);
2233 }
2234
2235
2236
2237
2238 /*-----------------------------------------------------------------------*/
2239 /* Read Directory Entry in Sequense */
2240 /*-----------------------------------------------------------------------*/
2241
2242 FRESULT f_readdir (
2243 DIR *dj, /* Pointer to the open directory object */
2244 FILINFO *fno /* Pointer to file information to return */
2245 )
2246 {
2247 FRESULT res;
2248 NAMEBUF(sfn, lfn);
2249
2250
2251 res = validate(dj->fs, dj->id); /* Check validity of the object */
2252 if (res == FR_OK) {
2253 INITBUF((*dj), sfn, lfn);
2254 if (!fno) {
2255 res = dir_seek(dj, 0);
2256 } else {
2257 res = dir_read(dj);
2258 if (res == FR_NO_FILE) {
2259 dj->sect = 0;
2260 res = FR_OK;
2261 }
2262 if (res == FR_OK) { /* A valid entry is found */
2263 get_fileinfo(dj, fno); /* Get the object information */
2264 res = dir_next(dj, FALSE); /* Increment index for next */
2265 if (res == FR_NO_FILE) {
2266 dj->sect = 0;
2267 res = FR_OK;
2268 }
2269 }
2270 }
2271 }
2272
2273 LEAVE_FF(dj->fs, res);
2274 }
2275
2276
2277
2278 #if _FS_MINIMIZE == 0
2279 /*-----------------------------------------------------------------------*/
2280 /* Get File Status */
2281 /*-----------------------------------------------------------------------*/
2282
2283 FRESULT f_stat (
2284 const XCHAR *path, /* Pointer to the file path */
2285 FILINFO *fno /* Pointer to file information to return */
2286 )
2287 {
2288 FRESULT res;
2289 DIR dj;
2290 NAMEBUF(sfn, lfn);
2291
2292
2293 res = chk_mounted(&path, &dj.fs, 0);
2294 if (res == FR_OK) {
2295 INITBUF(dj, sfn, lfn);
2296 res = follow_path(&dj, path); /* Follow the file path */
2297 if (res == FR_OK) { /* Follwo completed */
2298 if (dj.dir) /* Found an object */
2299 get_fileinfo(&dj, fno);
2300 else /* It is root dir */
2301 res = FR_INVALID_NAME;
2302 }
2303 }
2304
2305 LEAVE_FF(dj.fs, res);
2306 }
2307
2308
2309
2310 #if !_FS_READONLY
2311 /*-----------------------------------------------------------------------*/
2312 /* Get Number of Free Clusters */
2313 /*-----------------------------------------------------------------------*/
2314
2315 FRESULT f_getfree (
2316 const XCHAR *path, /* Pointer to the logical drive number (root dir) */
2317 DWORD *nclst, /* Pointer to the variable to return number of free clusters */
2318 FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */
2319 )
2320 {
2321 FRESULT res;
2322 DWORD n, clst, sect, stat;
2323 UINT i;
2324 BYTE fat, *p;
2325
2326
2327 /* Get drive number */
2328 res = chk_mounted(&path, fatfs, 0);
2329 if (res != FR_OK) LEAVE_FF(*fatfs, res);
2330
2331 /* If number of free cluster is valid, return it without cluster scan. */
2332 if ((*fatfs)->free_clust <= (*fatfs)->max_clust - 2) {
2333 *nclst = (*fatfs)->free_clust;
2334 LEAVE_FF(*fatfs, FR_OK);
2335 }
2336
2337 /* Get number of free clusters */
2338 fat = (*fatfs)->fs_type;
2339 n = 0;
2340 if (fat == FS_FAT12) {
2341 clst = 2;
2342 do {
2343 stat = get_fat(*fatfs, clst);
2344 if (stat == 0xFFFFFFFF) LEAVE_FF(*fatfs, FR_DISK_ERR);
2345 if (stat == 1) LEAVE_FF(*fatfs, FR_INT_ERR);
2346 if (stat == 0) n++;
2347 } while (++clst < (*fatfs)->max_clust);
2348 } else {
2349 clst = (*fatfs)->max_clust;
2350 sect = (*fatfs)->fatbase;
2351 i = 0; p = 0;
2352 do {
2353 if (!i) {
2354 res = move_window(*fatfs, sect++);
2355 if (res != FR_OK)
2356 LEAVE_FF(*fatfs, res);
2357 p = (*fatfs)->win;
2358 i = SS(*fatfs);
2359 }
2360 if (fat == FS_FAT16) {
2361 if (LD_WORD(p) == 0) n++;
2362 p += 2; i -= 2;
2363 } else {
2364 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
2365 p += 4; i -= 4;
2366 }
2367 } while (--clst);
2368 }
2369 (*fatfs)->free_clust = n;
2370 if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1;
2371 *nclst = n;
2372
2373 LEAVE_FF(*fatfs, FR_OK);
2374 }
2375
2376
2377
2378
2379 /*-----------------------------------------------------------------------*/
2380 /* Truncate File */
2381 /*-----------------------------------------------------------------------*/
2382
2383 FRESULT f_truncate (
2384 FIL *fp /* Pointer to the file object */
2385 )
2386 {
2387 FRESULT res;
2388 DWORD ncl;
2389
2390
2391 res = validate(fp->fs, fp->id); /* Check validity of the object */
2392 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2393 if (fp->flag & FA__ERROR) /* Check abort flag */
2394 LEAVE_FF(fp->fs, FR_INT_ERR);
2395 if (!(fp->flag & FA_WRITE)) /* Check access mode */
2396 LEAVE_FF(fp->fs, FR_DENIED);
2397
2398 if (fp->fsize > fp->fptr) {
2399 fp->fsize = fp->fptr; /* Set file size to current R/W point */
2400 fp->flag |= FA__WRITTEN;
2401 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
2402 res = remove_chain(fp->fs, fp->org_clust);
2403 fp->org_clust = 0;
2404 } else { /* When truncate a part of the file, remove remaining clusters */
2405 ncl = get_fat(fp->fs, fp->curr_clust);
2406 res = FR_OK;
2407 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
2408 if (ncl == 1) res = FR_INT_ERR;
2409 if (res == FR_OK && ncl < fp->fs->max_clust) {
2410 res = put_fat(fp->fs, fp->curr_clust, 0x0FFFFFFF);
2411 if (res == FR_OK) res = remove_chain(fp->fs, ncl);
2412 }
2413 }
2414 }
2415 if (res != FR_OK) fp->flag |= FA__ERROR;
2416
2417 LEAVE_FF(fp->fs, res);
2418 }
2419
2420
2421
2422
2423 /*-----------------------------------------------------------------------*/
2424 /* Delete a File or Directory */
2425 /*-----------------------------------------------------------------------*/
2426
2427 FRESULT f_unlink (
2428 const XCHAR *path /* Pointer to the file or directory path */
2429 )
2430 {
2431 FRESULT res;
2432 DIR dj, sdj;
2433 NAMEBUF(sfn, lfn);
2434 BYTE *dir;
2435 DWORD dclst;
2436
2437
2438 res = chk_mounted(&path, &dj.fs, 1);
2439 if (res != FR_OK) LEAVE_FF(dj.fs, res);
2440
2441 INITBUF(dj, sfn, lfn);
2442 res = follow_path(&dj, path); /* Follow the file path */
2443 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
2444 res = FR_INVALID_NAME;
2445 if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
2446
2447 dir = dj.dir;
2448 if (!dir) /* Is it the root directory? */
2449 LEAVE_FF(dj.fs, FR_INVALID_NAME);
2450 if (dir[DIR_Attr] & AM_RDO) /* Is it a R/O object? */
2451 LEAVE_FF(dj.fs, FR_DENIED);
2452 dclst = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
2453
2454 if (dir[DIR_Attr] & AM_DIR) { /* It is a sub-directory */
2455 if (dclst < 2) LEAVE_FF(dj.fs, FR_INT_ERR);
2456 mem_cpy(&sdj, &dj, sizeof(DIR)); /* Check if the sub-dir is empty or not */
2457 sdj.sclust = dclst;
2458 res = dir_seek(&sdj, 2);
2459 if (res != FR_OK) LEAVE_FF(dj.fs, res);
2460 res = dir_read(&sdj);
2461 if (res == FR_OK) res = FR_DENIED; /* Not empty sub-dir */
2462 if (res != FR_NO_FILE) LEAVE_FF(dj.fs, res);
2463 }
2464
2465 res = dir_remove(&dj); /* Remove directory entry */
2466 if (res == FR_OK) {
2467 if (dclst)
2468 res = remove_chain(dj.fs, dclst); /* Remove the cluster chain */
2469 if (res == FR_OK) res = sync(dj.fs);
2470 }
2471
2472 LEAVE_FF(dj.fs, res);
2473 }
2474
2475
2476
2477
2478 /*-----------------------------------------------------------------------*/
2479 /* Create a Directory */
2480 /*-----------------------------------------------------------------------*/
2481
2482 FRESULT f_mkdir (
2483 const XCHAR *path /* Pointer to the directory path */
2484 )
2485 {
2486 FRESULT res;
2487 DIR dj;
2488 NAMEBUF(sfn, lfn);
2489 BYTE *dir, n;
2490 DWORD dsect, dclst, pclst, tim;
2491
2492
2493 res = chk_mounted(&path, &dj.fs, 1);
2494 if (res != FR_OK) LEAVE_FF(dj.fs, res);
2495
2496 INITBUF(dj, sfn, lfn);
2497 res = follow_path(&dj, path); /* Follow the file path */
2498 if (res == FR_OK) res = FR_EXIST; /* Any file or directory is already existing */
2499 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
2500 res = FR_INVALID_NAME;
2501 if (res != FR_NO_FILE) /* Any error occured */
2502 LEAVE_FF(dj.fs, res);
2503
2504 dclst = create_chain(dj.fs, 0); /* Allocate a new cluster for new directory table */
2505 res = FR_OK;
2506 if (dclst == 0) res = FR_DENIED;
2507 if (dclst == 1) res = FR_INT_ERR;
2508 if (dclst == 0xFFFFFFFF) res = FR_DISK_ERR;
2509 if (res == FR_OK)
2510 res = move_window(dj.fs, 0);
2511 if (res != FR_OK) LEAVE_FF(dj.fs, res);
2512 dsect = clust2sect(dj.fs, dclst);
2513
2514 dir = dj.fs->win; /* Initialize the new directory table */
2515 mem_set(dir, 0, SS(dj.fs));
2516 mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */
2517 dir[DIR_Name] = '.';
2518 dir[DIR_Attr] = AM_DIR;
2519 tim = get_fattime();
2520 ST_DWORD(dir+DIR_WrtTime, tim);
2521 ST_WORD(dir+DIR_FstClusLO, dclst);
2522 ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
2523 mem_cpy(dir+32, dir, 32); /* Create ".." entry */
2524 dir[33] = '.';
2525 pclst = dj.sclust;
2526 if (dj.fs->fs_type == FS_FAT32 && pclst == dj.fs->dirbase)
2527 pclst = 0;
2528 ST_WORD(dir+32+DIR_FstClusLO, pclst);
2529 ST_WORD(dir+32+DIR_FstClusHI, pclst >> 16);
2530 for (n = 0; n < dj.fs->csize; n++) { /* Write dot entries and clear left sectors */
2531 dj.fs->winsect = dsect++;
2532 dj.fs->wflag = 1;
2533 res = move_window(dj.fs, 0);
2534 if (res) LEAVE_FF(dj.fs, res);
2535 mem_set(dir, 0, SS(dj.fs));
2536 }
2537
2538 res = dir_register(&dj);
2539 if (res != FR_OK) {
2540 remove_chain(dj.fs, dclst);
2541 } else {
2542 dir = dj.dir;
2543 dir[DIR_Attr] = AM_DIR; /* Attribute */
2544 ST_DWORD(dir+DIR_WrtTime, tim); /* Crated time */
2545 ST_WORD(dir+DIR_FstClusLO, dclst); /* Table start cluster */
2546 ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
2547 dj.fs->wflag = 1;
2548 res = sync(dj.fs);
2549 }
2550
2551 LEAVE_FF(dj.fs, res);
2552 }
2553
2554
2555
2556
2557 /*-----------------------------------------------------------------------*/
2558 /* Change File Attribute */
2559 /*-----------------------------------------------------------------------*/
2560
2561 FRESULT f_chmod (
2562 const XCHAR *path, /* Pointer to the file path */
2563 BYTE value, /* Attribute bits */
2564 BYTE mask /* Attribute mask to change */
2565 )
2566 {
2567 FRESULT res;
2568 DIR dj;
2569 NAMEBUF(sfn, lfn);
2570 BYTE *dir;
2571
2572
2573 res = chk_mounted(&path, &dj.fs, 1);
2574 if (res == FR_OK) {
2575 INITBUF(dj, sfn, lfn);
2576 res = follow_path(&dj, path); /* Follow the file path */
2577 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
2578 res = FR_INVALID_NAME;
2579 if (res == FR_OK) {
2580 dir = dj.dir;
2581 if (!dir) { /* Is it a root directory? */
2582 res = FR_INVALID_NAME;
2583 } else { /* File or sub directory */
2584 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
2585 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
2586 dj.fs->wflag = 1;
2587 res = sync(dj.fs);
2588 }
2589 }
2590 }
2591
2592 LEAVE_FF(dj.fs, res);
2593 }
2594
2595
2596
2597
2598 /*-----------------------------------------------------------------------*/
2599 /* Change Timestamp */
2600 /*-----------------------------------------------------------------------*/
2601
2602 FRESULT f_utime (
2603 const XCHAR *path, /* Pointer to the file/directory name */
2604 const FILINFO *fno /* Pointer to the timestamp to be set */
2605 )
2606 {
2607 FRESULT res;
2608 DIR dj;
2609 NAMEBUF(sfn, lfn);
2610 BYTE *dir;
2611
2612
2613 res = chk_mounted(&path, &dj.fs, 1);
2614 if (res == FR_OK) {
2615 INITBUF(dj, sfn, lfn);
2616 res = follow_path(&dj, path); /* Follow the file path */
2617 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
2618 res = FR_INVALID_NAME;
2619 if (res == FR_OK) {
2620 dir = dj.dir;
2621 if (!dir) { /* Root directory */
2622 res = FR_INVALID_NAME;
2623 } else { /* File or sub-directory */
2624 ST_WORD(dir+DIR_WrtTime, fno->ftime);
2625 ST_WORD(dir+DIR_WrtDate, fno->fdate);
2626 dj.fs->wflag = 1;
2627 res = sync(dj.fs);
2628 }
2629 }
2630 }
2631
2632 LEAVE_FF(dj.fs, res);
2633 }
2634
2635
2636
2637
2638 /*-----------------------------------------------------------------------*/
2639 /* Rename File/Directory */
2640 /*-----------------------------------------------------------------------*/
2641
2642 FRESULT f_rename (
2643 const XCHAR *path_old, /* Pointer to the old name */
2644 const XCHAR *path_new /* Pointer to the new name */
2645 )
2646 {
2647 FRESULT res;
2648 DIR dj_old, dj_new;
2649 NAMEBUF(sfn, lfn);
2650 BYTE buf[21], *dir;
2651 DWORD dw;
2652
2653
2654 INITBUF(dj_old, sfn, lfn);
2655 res = chk_mounted(&path_old, &dj_old.fs, 1);
2656 if (res == FR_OK) {
2657 dj_new.fs = dj_old.fs;
2658 res = follow_path(&dj_old, path_old); /* Check old object */
2659 if (_FS_RPATH && res == FR_OK && (dj_old.fn[NS] & NS_DOT))
2660 res = FR_INVALID_NAME;
2661 }
2662 if (res != FR_OK) LEAVE_FF(dj_old.fs, res); /* The old object is not found */
2663
2664 if (!dj_old.dir) LEAVE_FF(dj_old.fs, FR_NO_FILE); /* Is root dir? */
2665 mem_cpy(buf, dj_old.dir+DIR_Attr, 21); /* Save the object information */
2666
2667 mem_cpy(&dj_new, &dj_old, sizeof(DIR));
2668 res = follow_path(&dj_new, path_new); /* Check new object */
2669 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
2670 if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */
2671 res = dir_register(&dj_new); /* Register the new object */
2672 if (res == FR_OK) {
2673 dir = dj_new.dir; /* Copy object information into new entry */
2674 mem_cpy(dir+13, buf+2, 19);
2675 dir[DIR_Attr] = buf[0] | AM_ARC;
2676 dj_old.fs->wflag = 1;
2677 if (dir[DIR_Attr] & AM_DIR) { /* Update .. entry in the directory if needed */
2678 dw = clust2sect(dj_new.fs, (DWORD)LD_WORD(dir+DIR_FstClusHI) | LD_WORD(dir+DIR_FstClusLO));
2679 if (!dw) {
2680 res = FR_INT_ERR;
2681 } else {
2682 res = move_window(dj_new.fs, dw);
2683 dir = dj_new.fs->win+32;
2684 if (res == FR_OK && dir[1] == '.') {
2685 dw = (dj_new.fs->fs_type == FS_FAT32 && dj_new.sclust == dj_new.fs->dirbase) ? 0 : dj_new.sclust;
2686 ST_WORD(dir+DIR_FstClusLO, dw);
2687 ST_WORD(dir+DIR_FstClusHI, dw >> 16);
2688 dj_new.fs->wflag = 1;
2689 }
2690 }
2691 }
2692 if (res == FR_OK) {
2693 res = dir_remove(&dj_old); /* Remove old entry */
2694 if (res == FR_OK)
2695 res = sync(dj_old.fs);
2696 }
2697 }
2698 }
2699
2700 LEAVE_FF(dj_old.fs, res);
2701 }
2702
2703 #endif /* !_FS_READONLY */
2704 #endif /* _FS_MINIMIZE == 0 */
2705 #endif /* _FS_MINIMIZE <= 1 */
2706 #endif /* _FS_MINIMIZE <= 2 */
2707
2708
2709
2710 /*-----------------------------------------------------------------------*/
2711 /* Forward data to the stream directly (Available on only _FS_TINY cfg) */
2712 /*-----------------------------------------------------------------------*/
2713 #if _USE_FORWARD && _FS_TINY
2714
2715 FRESULT f_forward (
2716 FIL *fp, /* Pointer to the file object */
2717 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
2718 UINT btr, /* Number of bytes to forward */
2719 UINT *bf /* Pointer to number of bytes forwarded */
2720 )
2721 {
2722 FRESULT res;
2723 DWORD remain, clst, sect;
2724 UINT rcnt;
2725
2726
2727 *bf = 0;
2728
2729 res = validate(fp->fs, fp->id); /* Check validity of the object */
2730 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2731 if (fp->flag & FA__ERROR) /* Check error flag */
2732 LEAVE_FF(fp->fs, FR_INT_ERR);
2733 if (!(fp->flag & FA_READ)) /* Check access mode */
2734 LEAVE_FF(fp->fs, FR_DENIED);
2735
2736 remain = fp->fsize - fp->fptr;
2737 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
2738
2739 for ( ; btr && (*func)(NULL, 0); /* Repeat until all data transferred or stream becomes busy */
2740 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
2741 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2742 if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
2743 clst = (fp->fptr == 0) ? /* On the top of the file? */
2744 fp->org_clust : get_fat(fp->fs, fp->curr_clust);
2745 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
2746 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2747 fp->curr_clust = clst; /* Update current cluster */
2748 fp->csect = 0; /* Reset sector address in the cluster */
2749 }
2750 fp->csect++; /* Next sector address in the cluster */
2751 }
2752 sect = clust2sect(fp->fs, fp->curr_clust); /* Get current data sector */
2753 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2754 sect += fp->csect - 1;
2755 if (move_window(fp->fs, sect)) /* Move sector window */
2756 ABORT(fp->fs, FR_DISK_ERR);
2757 fp->dsect = sect;
2758 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
2759 if (rcnt > btr) rcnt = btr;
2760 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
2761 if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
2762 }
2763
2764 LEAVE_FF(fp->fs, FR_OK);
2765 }
2766 #endif /* _USE_FORWARD */
2767
2768
2769
2770 #if _USE_MKFS && !_FS_READONLY
2771 /*-----------------------------------------------------------------------*/
2772 /* Create File System on the Drive */
2773 /*-----------------------------------------------------------------------*/
2774 #define N_ROOTDIR 512 /* Multiple of 32 and <= 2048 */
2775 #define N_FATS 1 /* 1 or 2 */
2776 #define MAX_SECTOR 131072000UL /* Maximum partition size */
2777 #define MIN_SECTOR 2000UL /* Minimum partition size */
2778
2779
2780 FRESULT f_mkfs (
2781 BYTE drv, /* Logical drive number */
2782 BYTE partition, /* Partitioning rule 0:FDISK, 1:SFD */
2783 WORD allocsize /* Allocation unit size [bytes] */
2784 )
2785 {
2786 static const DWORD sstbl[] = { 2048000, 1024000, 512000, 256000, 128000, 64000, 32000, 16000, 8000, 4000, 0 };
2787 static const WORD cstbl[] = { 32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512 };
2788 BYTE fmt, m, *tbl;
2789 DWORD b_part, b_fat, b_dir, b_data; /* Area offset (LBA) */
2790 DWORD n_part, n_rsv, n_fat, n_dir; /* Area size */
2791 DWORD n_clst, d, n;
2792 WORD as;
2793 FATFS *fs;
2794 DSTATUS stat;
2795
2796
2797 /* Check validity of the parameters */
2798 if (drv >= _DRIVES) return FR_INVALID_DRIVE;
2799 if (partition >= 2) return FR_MKFS_ABORTED;
2800
2801 /* Check mounted drive and clear work area */
2802 fs = FatFs[drv];
2803 if (!fs) return FR_NOT_ENABLED;
2804 fs->fs_type = 0;
2805 drv = LD2PD(drv);
2806
2807 /* Get disk statics */
2808 stat = disk_initialize(drv);
2809 if (stat & STA_NOINIT) return FR_NOT_READY;
2810 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
2811 #if _MAX_SS != 512 /* Get disk sector size */
2812 if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
2813 || SS(fs) > _MAX_SS)
2814 return FR_MKFS_ABORTED;
2815 #endif
2816 if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_part) != RES_OK || n_part < MIN_SECTOR)
2817 return FR_MKFS_ABORTED;
2818 if (n_part > MAX_SECTOR) n_part = MAX_SECTOR;
2819 b_part = (!partition) ? 63 : 0; /* Boot sector */
2820 n_part -= b_part;
2821 for (d = 512; d <= 32768U && d != allocsize; d <<= 1) ; /* Check validity of the allocation unit size */
2822 if (d != allocsize) allocsize = 0;
2823 if (!allocsize) { /* Auto selection of cluster size */
2824 d = n_part;
2825 for (as = SS(fs); as > 512U; as >>= 1) d >>= 1;
2826 for (n = 0; d < sstbl[n]; n++) ;
2827 allocsize = cstbl[n];
2828 }
2829 if (allocsize < SS(fs)) allocsize = SS(fs);
2830
2831 allocsize /= SS(fs); /* Number of sectors per cluster */
2832
2833 /* Pre-compute number of clusters and FAT type */
2834 n_clst = n_part / allocsize;
2835 fmt = FS_FAT12;
2836 if (n_clst >= 0xFF5) fmt = FS_FAT16;
2837 if (n_clst >= 0xFFF5) fmt = FS_FAT32;
2838
2839 /* Determine offset and size of FAT structure */
2840 switch (fmt) {
2841 case FS_FAT12:
2842 n_fat = ((n_clst * 3 + 1) / 2 + 3 + SS(fs) - 1) / SS(fs);
2843 n_rsv = 1 + partition;
2844 n_dir = N_ROOTDIR * 32 / SS(fs);
2845 break;
2846 case FS_FAT16:
2847 n_fat = ((n_clst * 2) + 4 + SS(fs) - 1) / SS(fs);
2848 n_rsv = 1 + partition;
2849 n_dir = N_ROOTDIR * 32 / SS(fs);
2850 break;
2851 default:
2852 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
2853 n_rsv = 33 - partition;
2854 n_dir = 0;
2855 }
2856 b_fat = b_part + n_rsv; /* FATs start sector */
2857 b_dir = b_fat + n_fat * N_FATS; /* Directory start sector */
2858 b_data = b_dir + n_dir; /* Data start sector */
2859
2860 /* Align data start sector to erase block boundary (for flash memory media) */
2861 if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK) return FR_MKFS_ABORTED;
2862 n = (b_data + n - 1) & ~(n - 1);
2863 n_fat += (n - b_data) / N_FATS;
2864 /* b_dir and b_data are no longer used below */
2865
2866 /* Determine number of cluster and final check of validity of the FAT type */
2867 n_clst = (n_part - n_rsv - n_fat * N_FATS - n_dir) / allocsize;
2868 if ( (fmt == FS_FAT16 && n_clst < 0xFF5)
2869 || (fmt == FS_FAT32 && n_clst < 0xFFF5))
2870 return FR_MKFS_ABORTED;
2871
2872 /* Create partition table if needed */
2873 if (!partition) {
2874 DWORD n_disk = b_part + n_part;
2875
2876 mem_set(fs->win, 0, SS(fs));
2877 tbl = fs->win+MBR_Table;
2878 ST_DWORD(tbl, 0x00010180); /* Partition start in CHS */
2879 if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */
2880 n_disk = n_disk / 63 / 255;
2881 tbl[7] = (BYTE)n_disk;
2882 tbl[6] = (BYTE)((n_disk >> 2) | 63);
2883 } else {
2884 ST_WORD(&tbl[6], 0xFFFF);
2885 }
2886 tbl[5] = 254;
2887 if (fmt != FS_FAT32) /* System ID */
2888 tbl[4] = (n_part < 0x10000) ? 0x04 : 0x06;
2889 else
2890 tbl[4] = 0x0c;
2891 ST_DWORD(tbl+8, 63); /* Partition start in LBA */
2892 ST_DWORD(tbl+12, n_part); /* Partition size in LBA */
2893 ST_WORD(tbl+64, 0xAA55); /* Signature */
2894 if (disk_write(drv, fs->win, 0, 1) != RES_OK)
2895 return FR_DISK_ERR;
2896 partition = 0xF8;
2897 } else {
2898 partition = 0xF0;
2899 }
2900
2901 /* Create boot record */
2902 tbl = fs->win; /* Clear buffer */
2903 mem_set(tbl, 0, SS(fs));
2904 ST_DWORD(tbl+BS_jmpBoot, 0x90FEEB); /* Boot code (jmp $, nop) */
2905 ST_WORD(tbl+BPB_BytsPerSec, SS(fs)); /* Sector size */
2906 tbl[BPB_SecPerClus] = (BYTE)allocsize; /* Sectors per cluster */
2907 ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
2908 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
2909 ST_WORD(tbl+BPB_RootEntCnt, SS(fs) / 32 * n_dir); /* Number of rootdir entries */
2910 if (n_part < 0x10000) { /* Number of total sectors */
2911 ST_WORD(tbl+BPB_TotSec16, n_part);
2912 } else {
2913 ST_DWORD(tbl+BPB_TotSec32, n_part);
2914 }
2915 tbl[BPB_Media] = partition; /* Media descripter */
2916 ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
2917 ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
2918 ST_DWORD(tbl+BPB_HiddSec, b_part); /* Hidden sectors */
2919 n = get_fattime(); /* Use current time as a VSN */
2920 if (fmt != FS_FAT32) {
2921 ST_DWORD(tbl+BS_VolID, n); /* Volume serial number */
2922 ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of secters per FAT */
2923 tbl[BS_DrvNum] = 0x80; /* Drive number */
2924 tbl[BS_BootSig] = 0x29; /* Extended boot signature */
2925 mem_cpy(tbl+BS_VolLab, "NO NAME FAT ", 19); /* Volume lavel, FAT signature */
2926 } else {
2927 ST_DWORD(tbl+BS_VolID32, n); /* Volume serial number */
2928 ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of secters per FAT */
2929 ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory cluster (2) */
2930 ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (bs+1) */
2931 ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (bs+6) */
2932 tbl[BS_DrvNum32] = 0x80; /* Drive number */
2933 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
2934 mem_cpy(tbl+BS_VolLab32, "NO NAME FAT32 ", 19); /* Volume lavel, FAT signature */
2935 }
2936 ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature */
2937 if (SS(fs) > 512U) {
2938 ST_WORD(tbl+SS(fs)-2, 0xAA55);
2939 }
2940 if (disk_write(drv, tbl, b_part+0, 1) != RES_OK)
2941 return FR_DISK_ERR;
2942 if (fmt == FS_FAT32)
2943 disk_write(drv, tbl, b_part+6, 1);
2944
2945 /* Initialize FAT area */
2946 for (m = 0; m < N_FATS; m++) {
2947 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
2948 if (fmt != FS_FAT32) {
2949 n = (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
2950 n |= partition;
2951 ST_DWORD(tbl, n); /* Reserve cluster #0-1 (FAT12/16) */
2952 } else {
2953 ST_DWORD(tbl+0, 0xFFFFFFF8); /* Reserve cluster #0-1 (FAT32) */
2954 ST_DWORD(tbl+4, 0xFFFFFFFF);
2955 ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
2956 }
2957 if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
2958 return FR_DISK_ERR;
2959 mem_set(tbl, 0, SS(fs)); /* Following FAT entries are filled by zero */
2960 for (n = 1; n < n_fat; n++) {
2961 if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
2962 return FR_DISK_ERR;
2963 }
2964 }
2965
2966 /* Initialize Root directory */
2967 m = (BYTE)((fmt == FS_FAT32) ? allocsize : n_dir);
2968 do {
2969 if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
2970 return FR_DISK_ERR;
2971 } while (--m);
2972
2973 /* Create FSInfo record if needed */
2974 if (fmt == FS_FAT32) {
2975 ST_WORD(tbl+BS_55AA, 0xAA55);
2976 ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
2977 ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
2978 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1);
2979 ST_DWORD(tbl+FSI_Nxt_Free, 0xFFFFFFFF);
2980 disk_write(drv, tbl, b_part+1, 1);
2981 disk_write(drv, tbl, b_part+7, 1);
2982 }
2983
2984 return (disk_ioctl(drv, CTRL_SYNC, (void*)NULL) == RES_OK) ? FR_OK : FR_DISK_ERR;
2985 }
2986
2987 #endif /* _USE_MKFS && !_FS_READONLY */
2988
2989
2990
2991
2992 #if _USE_STRFUNC
2993 /*-----------------------------------------------------------------------*/
2994 /* Get a string from the file */
2995 /*-----------------------------------------------------------------------*/
2996 char* f_gets (
2997 char* buff, /* Pointer to the string buffer to read */
2998 int len, /* Size of string buffer */
2999 FIL* fil /* Pointer to the file object */
3000 )
3001 {
3002 int i = 0;
3003 char *p = buff;
3004 UINT rc;
3005
3006
3007 while (i < len - 1) { /* Read bytes until buffer gets filled */
3008 f_read(fil, p, 1, &rc);
3009 if (rc != 1) break; /* Break when no data to read */
3010 #if _USE_STRFUNC >= 2
3011 if (*p == '\r') continue; /* Strip '\r' */
3012 #endif
3013 i++;
3014 if (*p++ == '\n') break; /* Break when reached end of line */
3015 }
3016 *p = 0;
3017 return i ? buff : NULL; /* When no data read (eof or error), return with error. */
3018 }
3019
3020
3021
3022 #if !_FS_READONLY
3023 #include <stdarg.h>
3024 /*-----------------------------------------------------------------------*/
3025 /* Put a character to the file */
3026 /*-----------------------------------------------------------------------*/
3027 int f_putc (
3028 int chr, /* A character to be output */
3029 FIL* fil /* Ponter to the file object */
3030 )
3031 {
3032 UINT bw;
3033 char c;
3034
3035
3036 #if _USE_STRFUNC >= 2
3037 if (chr == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */
3038 #endif
3039 if (!fil) { /* Special value may be used to switch the destination to any other device */
3040 /* put_console(chr); */
3041 return chr;
3042 }
3043 c = (char)chr;
3044 f_write(fil, &c, 1, &bw); /* Write a byte to the file */
3045 return bw ? chr : EOF; /* Return the result */
3046 }
3047
3048
3049
3050
3051 /*-----------------------------------------------------------------------*/
3052 /* Put a string to the file */
3053 /*-----------------------------------------------------------------------*/
3054 int f_puts (
3055 const char* str, /* Pointer to the string to be output */
3056 FIL* fil /* Pointer to the file object */
3057 )
3058 {
3059 int n;
3060
3061
3062 for (n = 0; *str; str++, n++) {
3063 if (f_putc(*str, fil) == EOF) return EOF;
3064 }
3065 return n;
3066 }
3067
3068
3069
3070
3071 /*-----------------------------------------------------------------------*/
3072 /* Put a formatted string to the file */
3073 /*-----------------------------------------------------------------------*/
3074 int f_printf (
3075 FIL* fil, /* Pointer to the file object */
3076 const char* str, /* Pointer to the format string */
3077 ... /* Optional arguments... */
3078 )
3079 {
3080 va_list arp;
3081 UCHAR c, f, r;
3082 ULONG val;
3083 char s[16];
3084 int i, w, res, cc;
3085
3086
3087 va_start(arp, str);
3088
3089 for (cc = res = 0; cc != EOF; res += cc) {
3090 c = *str++;
3091 if (c == 0) break; /* End of string */
3092 if (c != '%') { /* Non escape cahracter */
3093 cc = f_putc(c, fil);
3094 if (cc != EOF) cc = 1;
3095 continue;
3096 }
3097 w = f = 0;
3098 c = *str++;
3099 if (c == '0') { /* Flag: '0' padding */
3100 f = 1; c = *str++;
3101 }
3102 while (c >= '0' && c <= '9') { /* Precision */
3103 w = w * 10 + (c - '0');
3104 c = *str++;
3105 }
3106 if (c == 'l') { /* Prefix: Size is long int */
3107 f |= 2; c = *str++;
3108 }
3109 if (c == 's') { /* Type is string */
3110 cc = f_puts(va_arg(arp, char*), fil);
3111 continue;
3112 }
3113 if (c == 'c') { /* Type is character */
3114 cc = f_putc(va_arg(arp, int), fil);
3115 if (cc != EOF) cc = 1;
3116 continue;
3117 }
3118 r = 0;
3119 if (c == 'd') r = 10; /* Type is signed decimal */
3120 if (c == 'u') r = 10; /* Type is unsigned decimal */
3121 if (c == 'X') r = 16; /* Type is unsigned hexdecimal */
3122 if (r == 0) break; /* Unknown type */
3123 if (f & 2) { /* Get the value */
3124 val = (ULONG)va_arg(arp, long);
3125 } else {
3126 val = (c == 'd') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int);
3127 }
3128 /* Put numeral string */
3129 if (c == 'd') {
3130 if (val & 0x80000000) {
3131 val = 0 - val;
3132 f |= 4;
3133 }
3134 }
3135 i = sizeof(s) - 1; s[i] = 0;
3136 do {
3137 c = (UCHAR)(val % r + '0');
3138 if (c > '9') c += 7;
3139 s[--i] = c;
3140 val /= r;
3141 } while (i && val);
3142 if (i && (f & 4)) s[--i] = '-';
3143 w = sizeof(s) - 1 - w;
3144 while (i && i > w) s[--i] = (f & 1) ? '0' : ' ';
3145 cc = f_puts(&s[i], fil);
3146 }
3147
3148 va_end(arp);
3149 return (cc == EOF) ? cc : res;
3150 }
3151
3152 #endif /* !_FS_READONLY */
3153 #endif /* _USE_STRFUNC */
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