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FreeRTOS
[armadillo_firmware.git] / FreeRTOS / Common / FileSystem / FatFs-0.7e / src / ff.c
blob7c8d55a1488749b03c6023b273b9c0fede951ee7
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 #include "ff.h" /* FatFs configurations and declarations */
79 #include "diskio.h" /* Declarations of low level disk I/O functions */
80
81 /*--------------------------------------------------------------------------
82
83 Module Private Definitions
84
85 ---------------------------------------------------------------------------*/
86 #if _FATFS != 0x007E
87 #error Wrong include file (ff.h).
88 #endif
89 #if _FS_REENTRANT
90 #if _USE_LFN == 1
91 #error Static LFN work area must not be used in re-entrant configuration.
92 #endif
93 #define ENTER_FF( fs ) \
94 { \
95 if( !lock_fs(fs) ) \
96 { \
97 return FR_TIMEOUT; \
98 } \
99 }
100
101 #define LEAVE_FF( fs, res ) \
102 { \
103 unlock_fs( fs, res ); \
104 return res; \
105 }
106
107 #else
108 #define ENTER_FF( fs )
109 #define LEAVE_FF( fs, res ) return res
110 #endif
111 #define ABORT( fs, res ) \
112 { \
113 fp->flag |= FA__ERROR; \
114 LEAVE_FF( fs, res ); \
115 }
116
117 #ifndef NULL
118 #define NULL 0
119 #endif
120
121 /* Name status flags */
122 #define NS 11 /* Offset of name status byte */
123 #define NS_LOSS 0x01 /* Out of 8.3 format */
124 #define NS_LFN 0x02 /* Force to create LFN entry */
125 #define NS_LAST 0x04 /* Last segment */
126 #define NS_BODY 0x08 /* Lower case flag (body) */
127 #define NS_EXT 0x10 /* Lower case flag (ext) */
128 #define NS_DOT 0x20 /* Dot entry */
129
130 /*--------------------------------------------------------------------------
131
132 Private Work Area
133
134 ---------------------------------------------------------------------------*/
135 #if _DRIVES < 1 || _DRIVES > 9
136 #error Number of drives must be 1-9.
137 #endif
138 static FATFS *FatFs[_DRIVES]; /* Pointer to the file system objects (logical drives) */
139
140 static WORD Fsid; /* File system mount ID */
141
142 #if _FS_RPATH
143 static BYTE Drive; /* Current drive */
144 #endif
145 #if _USE_LFN == 1 /* LFN with static LFN working buffer */
146 static WCHAR LfnBuf[_MAX_LFN + 1];
147 #define NAMEBUF( sp, lp ) \
148 BYTE sp[12]; \
149 WCHAR *lp = LfnBuf
150 #define INITBUF( dj, sp, lp ) \
151 dj.fn = sp; \
152 dj.lfn = lp
153
154 #elif _USE_LFN > 1 /* LFN with dynamic LFN working buffer */
155 #define NAMEBUF( sp, lp ) \
156 BYTE sp[12]; \
157 WCHAR lbuf[_MAX_LFN + 1], *lp = lbuf
158 #define INITBUF( dj, sp, lp ) \
159 dj.fn = sp; \
160 dj.lfn = lp
161
162 #else /* No LFN */
163 #define NAMEBUF( sp, lp ) BYTE sp[12]
164 #define INITBUF( dj, sp, lp ) dj.fn = sp
165 #endif
166
167 /*--------------------------------------------------------------------------
168
169 Module Private Functions
170
171 ---------------------------------------------------------------------------*/
172
173 /*-----------------------------------------------------------------------*/
174
175 /* String functions */
176
177 /*-----------------------------------------------------------------------*/
178
179 /* Copy memory to memory */
180 static void mem_cpy ( void *dst, const void *src, int cnt )
181 {
182 char *d = ( char * ) dst;
183 const char *s = ( const char * ) src;
184 while( cnt-- )
185 {
186 *d++ = *s++;
187 }
188 }
189
190 /* Fill memory */
191 static void mem_set ( void *dst, int val, int cnt )
192 {
193 char *d = ( char * ) dst;
194 while( cnt-- )
195 {
196 *d++ = ( char ) val;
197 }
198 }
199
200 /* Compare memory to memory */
201 static int mem_cmp ( const void *dst, const void *src, int cnt )
202 {
203 const char *d = ( const char * ) dst, *s = ( const char * ) src;
204 int r = 0;
205 while( cnt-- && (r = *d++ -*s++) == 0 );
206 return r;
207 }
208
209 /* Check if chr is contained in the string */
210 static int chk_chr ( const char *str, int chr )
211 {
212 while( *str && *str != chr )
213 {
214 str++;
215 }
216
217 return *str;
218 }
219
220 /*-----------------------------------------------------------------------*/
221
222 /* Request/Release grant to access the volume */
223
224 /*-----------------------------------------------------------------------*/
225 #if _FS_REENTRANT
226 static BOOL lock_fs ( FATFS * fs /* File system object */ )
227 {
228 return ff_req_grant( fs->sobj );
229 }
230
231 static void unlock_fs ( FATFS * fs, /* File system object */ FRESULT res /* Result code to be returned */ )
232 {
233 if( res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_INVALID_OBJECT && res != FR_TIMEOUT )
234 {
235 ff_rel_grant( fs->sobj );
236 }
237 }
238
239 #endif
240
241 /*-----------------------------------------------------------------------*/
242
243 /* Change window offset */
244
245 /*-----------------------------------------------------------------------*/
246 static FRESULT move_window ( FATFS * fs, /* File system object */ DWORD sector /* Sector number to make apperance in the fs->win[] */ ) /* Move to zero only writes back dirty window */
247 {
248 DWORD wsect;
249
250 wsect = fs->winsect;
251 if( wsect != sector )
252 { /* Changed current window */
253 #if !_FS_READONLY
254 if( fs->wflag )
255 { /* Write back dirty window if needed */
256 if( disk_write(fs->drive, fs->win, wsect, 1) != RES_OK )
257 {
258 return FR_DISK_ERR;
259 }
260
261 fs->wflag = 0;
262 if( wsect < (fs->fatbase + fs->sects_fat) )
263 { /* In FAT area */
264 BYTE nf;
265 for( nf = fs->n_fats; nf > 1; nf-- )
266 { /* Refrect the change to all FAT copies */
267 wsect += fs->sects_fat;
268 disk_write( fs->drive, fs->win, wsect, 1 );
269 }
270 }
271 }
272
273 #endif
274 if( sector )
275 {
276 if( disk_read(fs->drive, fs->win, sector, 1) != RES_OK )
277 {
278 return FR_DISK_ERR;
279 }
280
281 fs->winsect = sector;
282 }
283 }
284
285 return FR_OK;
286 }
287
288 /*-----------------------------------------------------------------------*/
289
290 /* Clean-up cached data */
291
292 /*-----------------------------------------------------------------------*/
293 #if !_FS_READONLY
294 static FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */ FATFS * fs /* File system object */ )
295 {
296 FRESULT res;
297
298 res = move_window( fs, 0 );
299 if( res == FR_OK )
300 {
301 /* Update FSInfo sector if needed */
302 if( fs->fs_type == FS_FAT32 && fs->fsi_flag )
303 {
304 fs->winsect = 0;
305 mem_set( fs->win, 0, 512 );
306 ST_WORD( fs->win + BS_55AA, 0xAA55 );
307 ST_DWORD( fs->win + FSI_LeadSig, 0x41615252 );
308 ST_DWORD( fs->win + FSI_StrucSig, 0x61417272 );
309 ST_DWORD( fs->win + FSI_Free_Count, fs->free_clust );
310 ST_DWORD( fs->win + FSI_Nxt_Free, fs->last_clust );
311 disk_write( fs->drive, fs->win, fs->fsi_sector, 1 );
312 fs->fsi_flag = 0;
313 }
314
315 /* Make sure that no pending write process in the physical drive */
316 if( disk_ioctl(fs->drive, CTRL_SYNC, ( void * ) NULL) != RES_OK )
317 {
318 res = FR_DISK_ERR;
319 }
320 }
321
322 return res;
323 }
324
325 #endif
326
327 /*-----------------------------------------------------------------------*/
328
329 /* FAT access - Read value of a FAT entry */
330
331 /*-----------------------------------------------------------------------*/
332 DWORD get_fat
333 ( /* 0xFFFFFFFF:Disk error, 1:Interal error, Else:Cluster status */
334 FATFS * fs, /* File system object */ DWORD clst /* Cluster# to get the link information */
335 )
336 {
337 UINT wc, bc;
338 DWORD fsect;
339
340 if( clst < 2 || clst >= fs->max_clust )
341 { /* Range check */
342 return 1;
343 }
344
345 fsect = fs->fatbase;
346 switch( fs->fs_type )
347 {
348 case FS_FAT12:
349 bc = clst;
350 bc += bc / 2;
351 if( move_window(fs, fsect + (bc / SS(fs))) )
352 {
353 break;
354 }
355
356 wc = fs->win[bc & ( SS(fs) - 1 )];
357 bc++;
358 if( move_window(fs, fsect + (bc / SS(fs))) )
359 {
360 break;
361 }
362
363 wc |= ( WORD ) fs->win[bc & ( SS(fs) - 1 )] << 8;
364 return( clst & 1 ) ? ( wc >> 4 ) : ( wc & 0xFFF );
365
366 case FS_FAT16:
367 if( move_window(fs, fsect + (clst / (SS(fs) / 2))) )
368 {
369 break;
370 }
371
372 return LD_WORD( &fs->win[((WORD) clst * 2) & (SS(fs) - 1)] );
373
374 case FS_FAT32:
375 if( move_window(fs, fsect + (clst / (SS(fs) / 4))) )
376 {
377 break;
378 }
379
380 return
381 LD_DWORD( &fs->win[((WORD) clst * 4) & (SS(fs) - 1)] )
382 & 0x0FFFFFFF;
383 }
384
385 return 0xFFFFFFFF; /* An error occured at the disk I/O layer */
386 }
387
388 /*-----------------------------------------------------------------------*/
389
390 /* FAT access - Change value of a FAT entry */
391
392 /*-----------------------------------------------------------------------*/
393 #if !_FS_READONLY
394 FRESULT put_fat
395 ( FATFS * fs, /* File system object */ DWORD clst, /* Cluster# to be changed in range of 2 to fs->max_clust - 1 */ DWORD val /* New value to mark the cluster */ )
396 {
397 UINT bc;
398 BYTE * p;
399 DWORD fsect;
400 FRESULT res;
401
402 if( clst < 2 || clst >= fs->max_clust )
403 { /* Range check */
404 res = FR_INT_ERR;
405 }
406 else
407 {
408 fsect = fs->fatbase;
409 switch( fs->fs_type )
410 {
411 case FS_FAT12:
412 bc = clst;
413 bc += bc / 2;
414 res = move_window( fs, fsect + (bc / SS(fs)) );
415 if( res != FR_OK )
416 {
417 break;
418 }
419
420 p = &fs->win[bc & ( SS(fs) - 1 )];
421 *p = ( clst & 1 ) ? ( (*p & 0x0F) | ((BYTE) val << 4) ) : ( BYTE ) val;
422 bc++;
423 fs->wflag = 1;
424 res = move_window( fs, fsect + (bc / SS(fs)) );
425 if( res != FR_OK )
426 {
427 break;
428 }
429
430 p = &fs->win[bc & ( SS(fs) - 1 )];
431 *p = ( clst & 1 ) ? ( BYTE ) ( val >> 4 ) : ( (*p & 0xF0) | ((BYTE) (val >> 8) & 0x0F) );
432 break;
433
434 case FS_FAT16:
435 res = move_window( fs, fsect + (clst / (SS(fs) / 2)) );
436 if( res != FR_OK )
437 {
438 break;
439 }
440
441 ST_WORD( &fs->win[((WORD) clst * 2) & (SS(fs) - 1)], (WORD) val );
442 break;
443
444 case FS_FAT32:
445 res = move_window( fs, fsect + (clst / (SS(fs) / 4)) );
446 if( res != FR_OK )
447 {
448 break;
449 }
450
451 ST_DWORD( &fs->win[((WORD) clst * 4) & (SS(fs) - 1)], val );
452 break;
453
454 default:
455 res = FR_INT_ERR;
456 }
457
458 fs->wflag = 1;
459 }
460
461 return res;
462 }
463
464 #endif /* !_FS_READONLY */
465
466 /*-----------------------------------------------------------------------*/
467
468 /* FAT handling - Remove a cluster chain */
469
470 /*-----------------------------------------------------------------------*/
471 #if !_FS_READONLY
472 static FRESULT remove_chain ( FATFS * fs, /* File system object */ DWORD clst /* Cluster# to remove a chain from */ )
473 {
474 FRESULT res;
475 DWORD nxt;
476
477 if( clst < 2 || clst >= fs->max_clust )
478 { /* Check the range of cluster# */
479 res = FR_INT_ERR;
480 }
481 else
482 {
483 res = FR_OK;
484 while( clst < fs->max_clust )
485 { /* Not a last link? */
486 nxt = get_fat( fs, clst ); /* Get cluster status */
487 if( nxt == 0 )
488 {
489 break; /* Empty cluster? */
490 }
491
492 if( nxt == 1 )
493 {
494 res = FR_INT_ERR;
495 break;
496 } /* Internal error? */
497 if( nxt == 0xFFFFFFFF )
498 {
499 res = FR_DISK_ERR;
500 break;
501 } /* Disk error? */
502 res = put_fat( fs, clst, 0 ); /* Mark the cluster "empty" */
503 if( res != FR_OK )
504 {
505 break;
506 }
507
508 if( fs->free_clust != 0xFFFFFFFF )
509 { /* Update FSInfo */
510 fs->free_clust++;
511 fs->fsi_flag = 1;
512 }
513
514 clst = nxt; /* Next cluster */
515 }
516 }
517
518 return res;
519 }
520
521 #endif
522
523 /*-----------------------------------------------------------------------*/
524
525 /* FAT handling - Stretch or Create a cluster chain */
526
527 /*-----------------------------------------------------------------------*/
528 #if !_FS_READONLY
529 static DWORD create_chain
530 ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
531 FATFS * fs, /* File system object */ DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
532 )
533 {
534 DWORD cs, ncl, scl, mcl;
535
536 mcl = fs->max_clust;
537 if( clst == 0 )
538 { /* Create new chain */
539 scl = fs->last_clust; /* Get suggested start point */
540 if( scl == 0 || scl >= mcl )
541 {
542 scl = 1;
543 }
544 }
545 else
546 { /* Stretch existing chain */
547 cs = get_fat( fs, clst ); /* Check the cluster status */
548 if( cs < 2 )
549 {
550 return 1; /* It is an invalid cluster */
551 }
552
553 if( cs < mcl )
554 {
555 return cs; /* It is already followed by next cluster */
556 }
557
558 scl = clst;
559 }
560
561 ncl = scl; /* Start cluster */
562 for( ;; )
563 {
564 ncl++; /* Next cluster */
565 if( ncl >= mcl )
566 { /* Wrap around */
567 ncl = 2;
568 if( ncl > scl )
569 {
570 return 0; /* No free custer */
571 }
572 }
573
574 cs = get_fat( fs, ncl ); /* Get the cluster status */
575 if( cs == 0 )
576 {
577 break; /* Found a free cluster */
578 }
579
580 if( cs == 0xFFFFFFFF || cs == 1 )
581 { /* An error occured */
582 return cs;
583 }
584
585 if( ncl == scl )
586 {
587 return 0; /* No free custer */
588 }
589 }
590
591 if( put_fat(fs, ncl, 0x0FFFFFFF) )
592 { /* Mark the new cluster "in use" */
593 return 0xFFFFFFFF;
594 }
595
596 if( clst != 0 )
597 { /* Link it to the previous one if needed */
598 if( put_fat(fs, clst, ncl) )
599 {
600 return 0xFFFFFFFF;
601 }
602 }
603
604 fs->last_clust = ncl; /* Update FSINFO */
605 if( fs->free_clust != 0xFFFFFFFF )
606 {
607 fs->free_clust--;
608 fs->fsi_flag = 1;
609 }
610
611 return ncl; /* Return new cluster number */
612 }
613
614 #endif /* !_FS_READONLY */
615
616 /*-----------------------------------------------------------------------*/
617
618 /* Get sector# from cluster# */
619
620 /*-----------------------------------------------------------------------*/
621 DWORD clust2sect
622 ( /* !=0: Sector number, 0: Failed - invalid cluster# */ FATFS * fs, /* File system object */ DWORD clst /* Cluster# to be converted */ )
623 {
624 clst -= 2;
625 if( clst >= (fs->max_clust - 2) )
626 {
627 return 0; /* Invalid cluster# */
628 }
629
630 return clst * fs->csize + fs->database;
631 }
632
633 /*-----------------------------------------------------------------------*/
634
635 /* Directory handling - Seek directory index */
636
637 /*-----------------------------------------------------------------------*/
638 static FRESULT dir_seek ( DIR * dj, /* Pointer to directory object */ WORD idx /* Directory index number */ )
639 {
640 DWORD clst;
641 WORD ic;
642
643 dj->index = idx;
644 clst = dj->sclust;
645 if( clst == 1 || clst >= dj->fs->max_clust )
646 { /* Check start cluster range */
647 return FR_INT_ERR;
648 }
649
650 if( !clst && dj->fs->fs_type == FS_FAT32 )
651 { /* Replace cluster# 0 with root cluster# if in FAT32 */
652 clst = dj->fs->dirbase;
653 }
654
655 if( clst == 0 )
656 { /* Static table */
657 dj->clust = clst;
658 if( idx >= dj->fs->n_rootdir )
659 { /* Index is out of range */
660 return FR_INT_ERR;
661 }
662
663 dj->sect = dj->fs->dirbase + idx / ( SS(dj->fs) / 32 ); /* Sector# */
664 }
665 else
666 { /* Dynamic table */
667 ic =
668 SS( dj->fs )
669 / 32 * dj->fs->csize; /* Entries per cluster */
670 while( idx >= ic )
671 { /* Follow cluster chain */
672 clst = get_fat( dj->fs, clst ); /* Get next cluster */
673 if( clst == 0xFFFFFFFF )
674 {
675 return FR_DISK_ERR; /* Disk error */
676 }
677
678 if( clst < 2 || clst >= dj->fs->max_clust )
679 { /* Reached to end of table or int error */
680 return FR_INT_ERR;
681 }
682
683 idx -= ic;
684 }
685
686 dj->clust = clst;
687 dj->sect =
688 clust2sect( dj->fs, clst )
689 + idx / ( SS(dj->fs) / 32 ); /* Sector# */
690 }
691
692 dj->dir = dj->fs->win + ( idx % (SS(dj->fs) / 32) ) * 32; /* Ptr to the entry in the sector */
693
694 return FR_OK; /* Seek succeeded */
695 }
696
697 /*-----------------------------------------------------------------------*/
698
699 /* Directory handling - Move directory index next */
700
701 /*-----------------------------------------------------------------------*/
702 static FRESULT dir_next
703 ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not streach */
704 DIR *
705 dj, /* Pointer to directory object */ BOOL streach /* FALSE: Do not streach table, TRUE: Streach table if needed */
706 )
707 {
708 DWORD clst;
709 WORD i;
710
711 i = dj->index + 1;
712 if( !i || !dj->sect )
713 { /* Report EOT when index has reached 65535 */
714 return FR_NO_FILE;
715 }
716
717 if( !(i % (SS(dj->fs) / 32)) )
718 { /* Sector changed? */
719 dj->sect++; /* Next sector */
720
721 if( dj->clust == 0 )
722 { /* Static table */
723 if( i >= dj->fs->n_rootdir )
724 { /* Report EOT when end of table */
725 return FR_NO_FILE;
726 }
727 }
728 else
729 { /* Dynamic table */
730 if( ((i / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0 )
731 { /* Cluster changed? */
732 clst = get_fat( dj->fs, dj->clust ); /* Get next cluster */
733 if( clst <= 1 )
734 {
735 return FR_INT_ERR;
736 }
737
738 if( clst == 0xFFFFFFFF )
739 {
740 return FR_DISK_ERR;
741 }
742
743 if( clst >= dj->fs->max_clust )
744 { /* When it reached end of dynamic table */
745 #if !_FS_READONLY
746 BYTE c;
747 if( !streach )
748 {
749 return FR_NO_FILE; /* When do not streach, report EOT */
750 }
751
752 clst = create_chain( dj->fs, dj->clust ); /* Streach cluster chain */
753 if( clst == 0 )
754 {
755 return FR_DENIED; /* No free cluster */
756 }
757
758 if( clst == 1 )
759 {
760 return FR_INT_ERR;
761 }
762
763 if( clst == 0xFFFFFFFF )
764 {
765 return FR_DISK_ERR;
766 }
767
768 /* Clean-up streached table */
769 if( move_window(dj->fs, 0) )
770 {
771 return FR_DISK_ERR; /* Flush active window */
772 }
773
774 mem_set( dj->fs->win, 0, SS(dj->fs) ); /* Clear window buffer */
775 dj->fs->winsect = clust2sect( dj->fs, clst ); /* Cluster start sector */
776 for( c = 0; c < dj->fs->csize; c++ )
777 { /* Fill the new cluster with 0 */
778 dj->fs->wflag = 1;
779 if( move_window(dj->fs, 0) )
780 {
781 return FR_DISK_ERR;
782 }
783
784 dj->fs->winsect++;
785 }
786
787 dj->fs->winsect -= c; /* Rewind window address */
788 #else
789 return FR_NO_FILE; /* Report EOT */
790 #endif
791 }
792
793 dj->clust = clst; /* Initialize data for new cluster */
794 dj->sect = clust2sect( dj->fs, clst );
795 }
796 }
797 }
798
799 dj->index = i;
800 dj->dir = dj->fs->win + ( i % (SS(dj->fs) / 32) ) * 32;
801
802 return FR_OK;
803 }
804
805 /*-----------------------------------------------------------------------*/
806
807 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
808
809 /*-----------------------------------------------------------------------*/
810 #if _USE_LFN
811 static const BYTE LfnOfs[] = { 1, 3, 5, 7, 9, 14, 16, 18, 20, 22, 24, 28, 30 };
812
813 /* Offset of LFN chars in the directory entry */
814
815 static BOOL cmp_lfn
816 ( /* TRUE:Matched, FALSE:Not matched */
817 WCHAR *lfnbuf, /* Pointer to the LFN to be compared */
818 BYTE *dir /* Pointer to the directory entry containing a part of LFN */
819 )
820 {
821 int i, s;
822 WCHAR wc, uc;
823
824 i = ( (dir[LDIR_Ord] & 0xBF) - 1 ) * 13; /* Get offset in the LFN buffer */
825 s = 0;
826 wc = 1;
827 do
828 {
829 uc = LD_WORD( dir + LfnOfs[s] ); /* Pick an LFN character from the entry */
830 if( wc )
831 { /* Last char has not been processed */
832 wc = ff_wtoupper( uc ); /* Convert it to upper case */
833 if( i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++]) )
834 { /* Compare it */
835 return FALSE; /* Not matched */
836 }
837 }
838 else
839 {
840 if( uc != 0xFFFF )
841 {
842 return FALSE; /* Check filler */
843 }
844 }
845 } while( ++s < 13 );
846
847 /* Repeat until all chars in the entry are checked */
848
849 if( (dir[LDIR_Ord] & 0x40) && wc && lfnbuf[i] )
850 { /* Last segment matched but different length */
851 return FALSE;
852 }
853
854 return TRUE; /* The part of LFN matched */
855 }
856
857 static BOOL pick_lfn
858 ( /* TRUE:Succeeded, FALSE:Buffer overflow */
859 WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */
860 BYTE *dir /* Pointer to the directory entry */
861 )
862 {
863 int i, s;
864 WCHAR wc, uc;
865
866 i = ( (dir[LDIR_Ord] & 0x3F) - 1 ) * 13; /* Offset in the LFN buffer */
867
868 s = 0;
869 wc = 1;
870 do
871 {
872 uc = LD_WORD( dir + LfnOfs[s] ); /* Pick an LFN character from the entry */
873 if( wc )
874 { /* Last char has not been processed */
875 if( i >= _MAX_LFN )
876 {
877 return FALSE; /* Buffer overflow? */
878 }
879
880 lfnbuf[i++] = wc = uc; /* Store it */
881 }
882 else
883 {
884 if( uc != 0xFFFF )
885 {
886 return FALSE; /* Check filler */
887 }
888 }
889 } while( ++s < 13 );
890
891 /* Read all character in the entry */
892
893 if( dir[LDIR_Ord] & 0x40 )
894 { /* Put terminator if it is the last LFN part */
895 if( i >= _MAX_LFN )
896 {
897 return FALSE; /* Buffer overflow? */
898 }
899
900 lfnbuf[i] = 0;
901 }
902
903 return TRUE;
904 }
905
906 #if !_FS_READONLY
907 static void fit_lfn
908 (
909 const WCHAR *lfnbuf, /* Pointer to the LFN buffer */
910 BYTE *dir, /* Pointer to the directory entry */
911 BYTE ord, /* LFN order (1-20) */
912 BYTE sum /* SFN sum */
913 )
914 {
915 int i, s;
916 WCHAR wc;
917
918 dir[LDIR_Chksum] = sum; /* Set check sum */
919 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
920 dir[LDIR_Type] = 0;
921 ST_WORD( dir + LDIR_FstClusLO, 0 );
922
923 i = ( ord - 1 ) * 13; /* Get offset in the LFN buffer */
924 s = wc = 0;
925 do
926 {
927 if( wc != 0xFFFF )
928 {
929 wc = lfnbuf[i++]; /* Get an effective char */
930 }
931
932 ST_WORD( dir + LfnOfs[s], wc ); /* Put it */
933 if( !wc )
934 {
935 wc = 0xFFFF; /* Padding chars following last char */
936 }
937 } while( ++s < 13 );
938 if( wc == 0xFFFF || !lfnbuf[i] )
939 {
940 ord |= 0x40; /* Bottom LFN part is the start of LFN sequence */
941 }
942
943 dir[LDIR_Ord] = ord; /* Set the LFN order */
944 }
945
946 #endif
947 #endif
948
949 /*-----------------------------------------------------------------------*/
950
951 /* Create numbered name */
952
953 /*-----------------------------------------------------------------------*/
954 #if _USE_LFN
955 void gen_numname
956 (
957 BYTE *dst, /* Pointer to genartated SFN */
958 const BYTE *src, /* Pointer to source SFN to be modified */
959 const WCHAR *lfn, /* Pointer to LFN */
960 WORD num /* Sequense number */
961 )
962 {
963 char ns[8];
964 int i, j;
965
966 mem_cpy( dst, src, 11 );
967
968 if( num > 5 )
969 { /* On many collisions, generate a hash number instead of sequencial number */
970 do
971 {
972 num = ( num >> 1 ) + ( num << 15 ) + ( WORD ) * lfn++;
973 } while( *lfn );
974 }
975
976 /* itoa */
977 i = 7;
978 do
979 {
980 ns[i--] = ( num % 10 ) + '0';
981 num /= 10;
982 } while( num );
983 ns[i] = '~';
984
985 /* Append the number */
986 for( j = 0; j < i && dst[j] != ' '; j++ )
987 {
988 if( IsDBCS1(dst[j]) )
989 {
990 if( j == i - 1 )
991 {
992 break;
993 }
994
995 j++;
996 }
997 }
998
999 do
1000 {
1001 dst[j++] = ( i < 8 ) ? ns[i++] : ' ';
1002 } while( j < 8 );
1003 }
1004
1005 #endif
1006
1007 /*-----------------------------------------------------------------------*/
1008
1009 /* Calculate sum of an SFN */
1010
1011 /*-----------------------------------------------------------------------*/
1012 #if _USE_LFN
1013 static BYTE sum_sfn( const BYTE *dir /* Ptr to directory entry */ )
1014 {
1015 BYTE sum = 0;
1016 int n = 11;
1017
1018 do
1019 {
1020 sum = ( sum >> 1 ) + ( sum << 7 ) +*dir++;
1021 } while( --n );
1022 return sum;
1023 }
1024
1025 #endif
1026
1027 /*-----------------------------------------------------------------------*/
1028
1029 /* Directory handling - Find an object in the directory */
1030
1031 /*-----------------------------------------------------------------------*/
1032 static FRESULT dir_find( DIR *dj /* Pointer to the directory object linked to the file name */ )
1033 {
1034 FRESULT res;
1035 BYTE c, *dir;
1036 #if _USE_LFN
1037 BYTE a, ord, sum;
1038 #endif
1039 res = dir_seek( dj, 0 ); /* Rewind directory object */
1040 if( res != FR_OK )
1041 {
1042 return res;
1043 }
1044
1045 #if _USE_LFN
1046 ord = sum = 0xFF;
1047 #endif
1048 do
1049 {
1050 res = move_window( dj->fs, dj->sect );
1051 if( res != FR_OK )
1052 {
1053 break;
1054 }
1055
1056 dir = dj->dir; /* Ptr to the directory entry of current index */
1057 c = dir[DIR_Name];
1058 if( c == 0 )
1059 {
1060 res = FR_NO_FILE;
1061 break;
1062 } /* Reached to end of table */
1063
1064 #if _USE_LFN /* LFN configuration */
1065 a = dir[DIR_Attr] & AM_MASK;
1066 if( c == 0xE5 || ((a & AM_VOL) && a != AM_LFN) )
1067 { /* An entry without valid data */
1068 ord = 0xFF;
1069 }
1070 else
1071 {
1072 if( a == AM_LFN )
1073 { /* An LFN entry is found */
1074 if( dj->lfn )
1075 {
1076 if( c & 0x40 )
1077 { /* Is it start of LFN sequence? */
1078 sum = dir[LDIR_Chksum];
1079 c &= 0xBF;
1080 ord = c; /* LFN start order */
1081 dj->lfn_idx = dj->index;
1082 }
1083
1084 /* Check validity of the LFN entry and compare it with given name */
1085 ord = ( c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir) ) ? ord - 1 : 0xFF;
1086 }
1087 }
1088 else
1089 { /* An SFN entry is found */
1090 if( !ord && sum == sum_sfn(dir) )
1091 {
1092 break; /* LFN matched? */
1093 }
1094
1095 ord = 0xFF;
1096 dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1097 if( !(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11) )
1098 {
1099 break; /* SFN matched? */
1100 }
1101 }
1102 }
1103
1104 #else /* Non LFN configuration */
1105 if( !(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11) )
1106 { /* Is it a valid entry? */
1107 break;
1108 }
1109
1110 #endif
1111 res = dir_next( dj, FALSE ); /* Next entry */
1112 } while( res == FR_OK );
1113
1114 return res;
1115 }
1116
1117 /*-----------------------------------------------------------------------*/
1118
1119 /* Read an object from the directory */
1120
1121 /*-----------------------------------------------------------------------*/
1122 #if _FS_MINIMIZE <= 1
1123 static FRESULT dir_read( DIR *dj /* Pointer to the directory object that pointing the entry to be read */ )
1124 {
1125 FRESULT res;
1126 BYTE c, *dir;
1127 #if _USE_LFN
1128 BYTE a, ord = 0xFF, sum = 0xFF;
1129 #endif
1130 res = FR_NO_FILE;
1131 while( dj->sect )
1132 {
1133 res = move_window( dj->fs, dj->sect );
1134 if( res != FR_OK )
1135 {
1136 break;
1137 }
1138
1139 dir = dj->dir; /* Ptr to the directory entry of current index */
1140 c = dir[DIR_Name];
1141 if( c == 0 )
1142 {
1143 res = FR_NO_FILE;
1144 break;
1145 } /* Reached to end of table */
1146
1147 #if _USE_LFN /* LFN configuration */
1148 a = dir[DIR_Attr] & AM_MASK;
1149 if( c == 0xE5 || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN) )
1150 { /* An entry without valid data */
1151 ord = 0xFF;
1152 }
1153 else
1154 {
1155 if( a == AM_LFN )
1156 { /* An LFN entry is found */
1157 if( c & 0x40 )
1158 { /* Is it start of LFN sequence? */
1159 sum = dir[LDIR_Chksum];
1160 c &= 0xBF;
1161 ord = c;
1162 dj->lfn_idx = dj->index;
1163 }
1164
1165 /* Check LFN validity and capture it */
1166 ord = ( c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir) ) ? ord - 1 : 0xFF;
1167 }
1168 else
1169 { /* An SFN entry is found */
1170 if( ord || sum != sum_sfn(dir) )
1171 { /* Is there a valid LFN? */
1172 dj->lfn_idx = 0xFFFF; /* It has no LFN. */
1173 }
1174
1175 break;
1176 }
1177 }
1178
1179 #else /* Non LFN configuration */
1180 if( c != 0xE5 && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL) )
1181 { /* Is it a valid entry? */
1182 break;
1183 }
1184
1185 #endif
1186 res = dir_next( dj, FALSE ); /* Next entry */
1187 if( res != FR_OK )
1188 {
1189 break;
1190 }
1191 }
1192
1193 if( res != FR_OK )
1194 {
1195 dj->sect = 0;
1196 }
1197
1198 return res;
1199 }
1200
1201 #endif
1202
1203 /*-----------------------------------------------------------------------*/
1204
1205 /* Register an object to the directory */
1206
1207 /*-----------------------------------------------------------------------*/
1208 #if !_FS_READONLY
1209 static FRESULT dir_register
1210 ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
1211 DIR *dj /* Target directory with object name to be created */
1212 )
1213 {
1214 FRESULT res;
1215 BYTE c, *dir;
1216 #if _USE_LFN /* LFN configuration */
1217 WORD n, ne, is;
1218 BYTE sn[12], *fn, sum;
1219 WCHAR *lfn;
1220
1221 fn = dj->fn;
1222 lfn = dj->lfn;
1223 mem_cpy( sn, fn, 12 );
1224
1225 if( _FS_RPATH && (sn[NS] & NS_DOT) )
1226 {
1227 return FR_INVALID_NAME; /* Cannot create dot entry */
1228 }
1229
1230 if( sn[NS] & NS_LOSS )
1231 { /* When LFN is out of 8.3 format, generate a numbered name */
1232 fn[NS] = 0;
1233 dj->lfn = NULL; /* Find only SFN */
1234 for( n = 1; n < 100; n++ )
1235 {
1236 gen_numname( fn, sn, lfn, n ); /* Generate a numbered name */
1237 res = dir_find( dj ); /* Check if the name collides with existing SFN */
1238 if( res != FR_OK )
1239 {
1240 break;
1241 }
1242 }
1243
1244 if( n == 100 )
1245 {
1246 return FR_DENIED; /* Abort if too many collisions */
1247 }
1248
1249 if( res != FR_NO_FILE )
1250 {
1251 return res; /* Abort if the result is other than 'not collided' */
1252 }
1253
1254 fn[NS] = sn[NS];
1255 dj->lfn = lfn;
1256 }
1257
1258 if( sn[NS] & NS_LFN )
1259 { /* When LFN is to be created, reserve reserve an SFN + LFN entries. */
1260 for( ne = 0; lfn[ne]; ne++ );
1261 ne = ( ne + 25 ) / 13;
1262 }
1263 else
1264 { /* Otherwise reserve only an SFN entry. */
1265 ne = 1;
1266 }
1267
1268 /* Reserve contiguous entries */
1269 res = dir_seek( dj, 0 );
1270 if( res != FR_OK )
1271 {
1272 return res;
1273 }
1274
1275 n = is = 0;
1276 do
1277 {
1278 res = move_window( dj->fs, dj->sect );
1279 if( res != FR_OK )
1280 {
1281 break;
1282 }
1283
1284 c = *dj->dir; /* Check the entry status */
1285 if( c == 0xE5 || c == 0 )
1286 { /* Is it a blank entry? */
1287 if( n == 0 )
1288 {
1289 is = dj->index; /* First index of the contigulus entry */
1290 }
1291
1292 if( ++n == ne )
1293 {
1294 break; /* A contiguous entry that requiered count is found */
1295 }
1296 }
1297 else
1298 {
1299 n = 0; /* Not a blank entry. Restart to search */
1300 }
1301
1302 res = dir_next( dj, TRUE ); /* Next entry with table streach */
1303 } while( res == FR_OK );
1304
1305 if( res == FR_OK && ne > 1 )
1306 { /* Initialize LFN entry if needed */
1307 res = dir_seek( dj, is );
1308 if( res == FR_OK )
1309 {
1310 sum = sum_sfn( dj->fn ); /* Sum of the SFN tied to the LFN */
1311 ne--;
1312 do
1313 { /* Store LFN entries in bottom first */
1314 res = move_window( dj->fs, dj->sect );
1315 if( res != FR_OK )
1316 {
1317 break;
1318 }
1319
1320 fit_lfn( dj->lfn, dj->dir, (BYTE) ne, sum );
1321 dj->fs->wflag = 1;
1322 res = dir_next( dj, FALSE ); /* Next entry */
1323 } while( res == FR_OK && --ne );
1324 }
1325 }
1326
1327 #else /* Non LFN configuration */
1328 res = dir_seek( dj, 0 );
1329 if( res == FR_OK )
1330 {
1331 do
1332 { /* Find a blank entry for the SFN */
1333 res = move_window( dj->fs, dj->sect );
1334 if( res != FR_OK )
1335 {
1336 break;
1337 }
1338
1339 c = *dj->dir;
1340 if( c == 0xE5 || c == 0 )
1341 {
1342 break; /* Is it a blank entry? */
1343 }
1344
1345 res = dir_next( dj, TRUE ); /* Next entry with table streach */
1346 } while( res == FR_OK );
1347 }
1348
1349 #endif
1350 if( res == FR_OK )
1351 { /* Initialize the SFN entry */
1352 res = move_window( dj->fs, dj->sect );
1353 if( res == FR_OK )
1354 {
1355 dir = dj->dir;
1356 mem_set( dir, 0, 32 ); /* Clean the entry */
1357 mem_cpy( dir, dj->fn, 11 ); /* Put SFN */
1358 dir[DIR_NTres] = *( dj->fn + NS ) & ( NS_BODY | NS_EXT ); /* Put NT flag */
1359 dj->fs->wflag = 1;
1360 }
1361 }
1362
1363 return res;
1364 }
1365
1366 #endif /* !_FS_READONLY */
1367
1368 /*-----------------------------------------------------------------------*/
1369
1370 /* Remove an object from the directory */
1371
1372 /*-----------------------------------------------------------------------*/
1373 #if !_FS_READONLY && !_FS_MINIMIZE
1374 static FRESULT dir_remove
1375 ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
1376 DIR *dj /* Directory object pointing the entry to be removed */
1377 )
1378 {
1379 FRESULT res;
1380 #if _USE_LFN /* LFN configuration */
1381 WORD i;
1382
1383 i = dj->index; /* SFN index */
1384 res = dir_seek( dj, (WORD) ((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx) ); /* Goto the SFN or top of the LFN entries */
1385 if( res == FR_OK )
1386 {
1387 do
1388 {
1389 res = move_window( dj->fs, dj->sect );
1390 if( res != FR_OK )
1391 {
1392 break;
1393 }
1394
1395 *dj->dir = 0xE5; /* Mark the entry "deleted" */
1396 dj->fs->wflag = 1;
1397 if( dj->index >= i )
1398 {
1399 break; /* When reached SFN, all entries of the object has been deleted. */
1400 }
1401
1402 res = dir_next( dj, FALSE ); /* Next entry */
1403 } while( res == FR_OK );
1404 if( res == FR_NO_FILE )
1405 {
1406 res = FR_INT_ERR;
1407 }
1408 }
1409
1410 #else /* Non LFN configuration */
1411 res = dir_seek( dj, dj->index );
1412 if( res == FR_OK )
1413 {
1414 res = move_window( dj->fs, dj->sect );
1415 if( res == FR_OK )
1416 {
1417 *dj->dir = 0xE5; /* Mark the entry "deleted" */
1418 dj->fs->wflag = 1;
1419 }
1420 }
1421
1422 #endif
1423 return res;
1424 }
1425
1426 #endif /* !_FS_READONLY */
1427
1428 /*-----------------------------------------------------------------------*/
1429
1430 /* Pick a segment and create the object name in directory form */
1431
1432 /*-----------------------------------------------------------------------*/
1433 static FRESULT create_name
1434 (
1435 DIR *dj, /* Pointer to the directory object */
1436 const XCHAR **path /* Pointer to pointer to the segment in the path string */
1437 )
1438 {
1439 #ifdef _EXCVT
1440
1441 static const BYTE cvt[] = _EXCVT;
1442 #endif
1443 #if _USE_LFN /* LFN configuration */
1444 BYTE b, cf;
1445 WCHAR w, *lfn;
1446 int i, ni, si, di;
1447 const XCHAR *p;
1448
1449 /* Create LFN in Unicode */
1450 si = di = 0;
1451 p = *path;
1452 lfn = dj->lfn;
1453 for( ;; )
1454 {
1455 w = p[si++]; /* Get a character */
1456 if( w < ' ' || w == '/' || w == '\\' )
1457 {
1458 break; /* Break on end of segment */
1459 }
1460
1461 if( di >= _MAX_LFN )
1462 { /* Reject too long name */
1463 return FR_INVALID_NAME;
1464 }
1465
1466 #if !_LFN_UNICODE
1467 w &= 0xFF;
1468 if( IsDBCS1(w) )
1469 { /* If it is a DBC 1st byte */
1470 b = p[si++]; /* Get 2nd byte */
1471 if( !IsDBCS2(b) )
1472 { /* Reject invalid code for DBC */
1473 return FR_INVALID_NAME;
1474 }
1475
1476 w = ( w << 8 ) + b;
1477 }
1478
1479 w = ff_convert( w, 1 ); /* Convert OEM to Unicode */
1480 if( !w )
1481 {
1482 return FR_INVALID_NAME; /* Reject invalid code */
1483 }
1484
1485 #endif
1486 if( w < 0x80 && chk_chr("\"*:<>\?|\x7F", w) )
1487 { /* Reject illegal chars for LFN */
1488 return FR_INVALID_NAME;
1489 }
1490
1491 lfn[di++] = w; /* Store the Unicode char */
1492 }
1493
1494 *path = &p[si]; /* Rerurn pointer to the next segment */
1495 cf = ( w < ' ' ) ? NS_LAST : 0; /* Set last segment flag if end of path */
1496 #if _FS_RPATH
1497 if( (di == 1 && lfn[di - 1] == '.') || /* Is this a dot entry? */ (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.') )
1498 {
1499 lfn[di] = 0;
1500 for( i = 0; i < 11; i++ )
1501 {
1502 dj->fn[i] = ( i < di ) ? '.' : ' ';
1503 }
1504
1505 dj->fn[i] = cf | NS_DOT; /* This is a dot entry */
1506 return FR_OK;
1507 }
1508
1509 #endif
1510 while( di )
1511 { /* Strip trailing spaces and dots */
1512 w = lfn[di - 1];
1513 if( w != ' ' && w != '.' )
1514 {
1515 break;
1516 }
1517
1518 di--;
1519 }
1520
1521 if( !di )
1522 {
1523 return FR_INVALID_NAME; /* Reject null string */
1524 }
1525
1526 lfn[di] = 0; /* LFN is created */
1527
1528 /* Create SFN in directory form */
1529 mem_set( dj->fn, ' ', 11 );
1530 for( si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++ );
1531
1532 /* Strip leading spaces and dots */
1533 if( si )
1534 {
1535 cf |= NS_LOSS | NS_LFN;
1536 }
1537
1538 while( di && lfn[di - 1] != '.' )
1539 {
1540 di--; /* Find extension (di<=si: no extension) */
1541 }
1542
1543 b = i = 0;
1544 ni = 8;
1545 for( ;; )
1546 {
1547 w = lfn[si++]; /* Get an LFN char */
1548 if( !w )
1549 {
1550 break; /* Break on enf of the LFN */
1551 }
1552
1553 if( w == ' ' || (w == '.' && si != di) )
1554 { /* Remove spaces and dots */
1555 cf |= NS_LOSS | NS_LFN;
1556 continue;
1557 }
1558
1559 if( i >= ni || si == di )
1560 { /* Extension or end of SFN */
1561 if( ni == 11 )
1562 { /* Long extension */
1563 cf |= NS_LOSS | NS_LFN;
1564 break;
1565 }
1566
1567 if( si != di )
1568 {
1569 cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
1570 }
1571
1572 if( si > di )
1573 {
1574 break; /* No extension */
1575 }
1576
1577 si = di;
1578 i = 8;
1579 ni = 11; /* Enter extension section */
1580 b <<= 2;
1581 continue;
1582 }
1583
1584 if( w >= 0x80 )
1585 { /* Non ASCII char */
1586 #ifdef _EXCVT
1587 w = ff_convert( w, 0 ); /* Unicode -> OEM code */
1588 if( w )
1589 {
1590 w = cvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
1591 }
1592
1593 #else
1594 w = ff_convert( ff_wtoupper(w), 0 ); /* Upper converted Unicode -> OEM code */
1595 #endif
1596 cf |= NS_LFN; /* Force create LFN entry */
1597 }
1598
1599 if( _DF1S && w >= 0x100 )
1600 { /* Double byte char */
1601 if( i >= ni - 1 )
1602 {
1603 cf |= NS_LOSS | NS_LFN;
1604 i = ni;
1605 continue;
1606 }
1607
1608 dj->fn[i++] = ( BYTE ) ( w >> 8 );
1609 }
1610 else
1611 { /* Single byte char */
1612 if( !w || chk_chr("+,;[=]", w) )
1613 { /* Replace illegal chars for SFN */
1614 w = '_';
1615 cf |= NS_LOSS | NS_LFN; /* Lossy conversion */
1616 }
1617 else
1618 {
1619 if( IsUpper(w) )
1620 { /* ASCII large capital */
1621 b |= 2;
1622 }
1623 else
1624 {
1625 if( IsLower(w) )
1626 { /* ASCII small capital */
1627 b |= 1;
1628 w -= 0x20;
1629 }
1630 }
1631 }
1632 }
1633
1634 dj->fn[i++] = ( BYTE ) w;
1635 }
1636
1637 if( dj->fn[0] == 0xE5 )
1638 {
1639 dj->fn[0] = 0x05; /* If the first char collides with deleted mark, replace it with 0x05 */
1640 }
1641
1642 if( ni == 8 )
1643 {
1644 b <<= 2;
1645 }
1646
1647 if( (b & 0x0C) == 0x0C || (b & 0x03) == 0x03 )
1648 { /* Create LFN entry when there are composite capitals */
1649 cf |= NS_LFN;
1650 }
1651
1652 if( !(cf & NS_LFN) )
1653 { /* When LFN is in 8.3 format without extended char, NT flags are created */
1654 if( (b & 0x03) == 0x01 )
1655 {
1656 cf |= NS_EXT; /* NT flag (Extension has only small capital) */
1657 }
1658
1659 if( (b & 0x0C) == 0x04 )
1660 {
1661 cf |= NS_BODY; /* NT flag (Filename has only small capital) */
1662 }
1663 }
1664
1665 dj->fn[NS] = cf; /* SFN is created */
1666
1667 return FR_OK;
1668
1669 #else /* Non-LFN configuration */
1670 BYTE b, c, d, *sfn;
1671 int ni, si, i;
1672 const char *p;
1673
1674 /* Create file name in directory form */
1675 sfn = dj->fn;
1676 mem_set( sfn, ' ', 11 );
1677 si = i = b = 0;
1678 ni = 8;
1679 p = *path;
1680 #if _FS_RPATH
1681 if( p[si] == '.' )
1682 { /* Is this a dot entry? */
1683 for( ;; )
1684 {
1685 c = p[si++];
1686 if( c != '.' || si >= 3 )
1687 {
1688 break;
1689 }
1690
1691 sfn[i++] = c;
1692 }
1693
1694 if( c != '/' && c != '\\' && c > ' ' )
1695 {
1696 return FR_INVALID_NAME;
1697 }
1698
1699 *path = &p[si]; /* Rerurn pointer to the next segment */
1700 sfn[NS] = ( c <= ' ' ) ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
1701 return FR_OK;
1702 }
1703
1704 #endif
1705 for( ;; )
1706 {
1707 c = p[si++];
1708 if( c <= ' ' || c == '/' || c == '\\' )
1709 {
1710 break; /* Break on end of segment */
1711 }
1712
1713 if( c == '.' || i >= ni )
1714 {
1715 if( ni != 8 || c != '.' )
1716 {
1717 return FR_INVALID_NAME;
1718 }
1719
1720 i = 8;
1721 ni = 11;
1722 b <<= 2;
1723 continue;
1724 }
1725
1726 if( c >= 0x80 )
1727 { /* Extended char */
1728 #ifdef _EXCVT
1729 c = cvt[c - 0x80]; /* Convert extend char (SBCS) */
1730 #else
1731 b |= 3; /* Eliminate NT flag if ext char is exist */
1732 #if !_DF1S /* ASCII only cfg */
1733 return FR_INVALID_NAME;
1734 #endif
1735 #endif
1736 }
1737
1738 if( IsDBCS1(c) )
1739 { /* DBC 1st byte? */
1740 d = p[si++]; /* Get 2nd byte */
1741 if( !IsDBCS2(d) || i >= ni - 1 )
1742 { /* Reject invalid DBC */
1743 return FR_INVALID_NAME;
1744 }
1745
1746 sfn[i++] = c;
1747 sfn[i++] = d;
1748 }
1749 else
1750 { /* Single byte code */
1751 if( chk_chr(" \"*+,[=]|\x7F", c) )
1752 { /* Reject illegal chrs for SFN */
1753 return FR_INVALID_NAME;
1754 }
1755
1756 if( IsUpper(c) )
1757 { /* ASCII large capital? */
1758 b |= 2;
1759 }
1760 else
1761 {
1762 if( IsLower(c) )
1763 { /* ASCII small capital? */
1764 b |= 1;
1765 c -= 0x20;
1766 }
1767 }
1768
1769 sfn[i++] = c;
1770 }
1771 }
1772
1773 *path = &p[si]; /* Return pointer to the next segment */
1774 c = ( c <= ' ' ) ? NS_LAST : 0; /* Set last segment flag if end of path */
1775
1776 if( !i )
1777 {
1778 return FR_INVALID_NAME; /* Reject null string */
1779 }
1780
1781 if( sfn[0] == 0xE5 )
1782 {
1783 sfn[0] = 0x05; /* When first char collides with 0xE5, replace it with 0x05 */
1784 }
1785
1786 if( ni == 8 )
1787 {
1788 b <<= 2;
1789 }
1790
1791 if( (b & 0x03) == 0x01 )
1792 {
1793 c |= NS_EXT; /* NT flag (Extension has only small capital) */
1794 }
1795
1796 if( (b & 0x0C) == 0x04 )
1797 {
1798 c |= NS_BODY; /* NT flag (Filename has only small capital) */
1799 }
1800
1801 sfn[NS] = c; /* Store NT flag, File name is created */
1802
1803 return FR_OK;
1804 #endif
1805 }
1806
1807 /*-----------------------------------------------------------------------*/
1808
1809 /* Get file information from directory entry */
1810
1811 /*-----------------------------------------------------------------------*/
1812 #if _FS_MINIMIZE <= 1
1813 static void get_fileinfo
1814 ( /* No return code */
1815 DIR *dj, /* Pointer to the directory object */
1816 FILINFO *fno /* Pointer to the file information to be filled */
1817 )
1818 {
1819 int i;
1820 BYTE c, nt, *dir;
1821 char *p;
1822
1823 p = fno->fname;
1824 if( dj->sect )
1825 {
1826 dir = dj->dir;
1827 nt = dir[DIR_NTres]; /* NT flag */
1828 for( i = 0; i < 8; i++ )
1829 { /* Copy name body */
1830 c = dir[i];
1831 if( c == ' ' )
1832 {
1833 break;
1834 }
1835
1836 if( c == 0x05 )
1837 {
1838 c = 0xE5;
1839 }
1840
1841 if( _USE_LFN && (nt & NS_BODY) && IsUpper(c) )
1842 {
1843 c += 0x20;
1844 }
1845
1846 *p++ = c;
1847 }
1848
1849 if( dir[8] != ' ' )
1850 { /* Copy name extension */
1851 *p++ = '.';
1852 for( i = 8; i < 11; i++ )
1853 {
1854 c = dir[i];
1855 if( c == ' ' )
1856 {
1857 break;
1858 }
1859
1860 if( _USE_LFN && (nt & NS_EXT) && IsUpper(c) )
1861 {
1862 c += 0x20;
1863 }
1864
1865 *p++ = c;
1866 }
1867 }
1868
1869 fno->fattrib = dir[DIR_Attr]; /* Attribute */
1870 fno->fsize = LD_DWORD( dir + DIR_FileSize ); /* Size */
1871 fno->fdate = LD_WORD( dir + DIR_WrtDate ); /* Date */
1872 fno->ftime = LD_WORD( dir + DIR_WrtTime ); /* Time */
1873 }
1874
1875 *p = 0;
1876
1877 #if _USE_LFN
1878 if( fno->lfname )
1879 {
1880 XCHAR *tp = fno->lfname;
1881 WCHAR w, *lfn;
1882
1883 i = 0;
1884 if( dj->sect && dj->lfn_idx != 0xFFFF )
1885 { /* Get LFN if available */
1886 lfn = dj->lfn;
1887 while( (w = *lfn++) != 0 )
1888 { /* Get an LFN char */
1889 #if !_LFN_UNICODE
1890 w = ff_convert( w, 0 ); /* Unicode -> OEM conversion */
1891 if( !w )
1892 {
1893 i = 0;
1894 break;
1895 } /* Could not convert, no LFN */
1896
1897 if( _DF1S && w >= 0x100 )
1898 { /* Put 1st byte if it is a DBC */
1899 tp[i++] = ( XCHAR ) ( w >> 8 );
1900 }
1901
1902 #endif
1903 if( i >= fno->lfsize - 1 )
1904 {
1905 i = 0;
1906 break;
1907 } /* Buffer overrun, no LFN */
1908
1909 tp[i++] = ( XCHAR ) w;
1910 }
1911 }
1912
1913 tp[i] = 0; /* Terminator */
1914 }
1915
1916 #endif
1917 }
1918
1919 #endif /* _FS_MINIMIZE <= 1 */
1920
1921 /*-----------------------------------------------------------------------*/
1922
1923 /* Follow a file path */
1924
1925 /*-----------------------------------------------------------------------*/
1926 static FRESULT follow_path
1927 ( /* FR_OK(0): successful, !=0: error code */
1928 DIR *dj, /* Directory object to return last directory and found object */
1929 const XCHAR *path /* Full-path string to find a file or directory */
1930 )
1931 {
1932 FRESULT res;
1933 BYTE *dir, last;
1934
1935 while( !_USE_LFN && *path == ' ' )
1936 {
1937 path++; /* Skip leading spaces */
1938 }
1939
1940 #if _FS_RPATH
1941 if( *path == '/' || *path == '\\' )
1942 { /* There is a heading separator */
1943 path++;
1944 dj->sclust = 0; /* Strip it and start from the root dir */
1945 }
1946 else
1947 { /* No heading saparator */
1948 dj->sclust = dj->fs->cdir; /* Start from the current dir */
1949 }
1950
1951 #else
1952 if( *path == '/' || *path == '\\' )
1953 { /* Strip heading separator if exist */
1954 path++;
1955 }
1956
1957 dj->sclust = 0; /* Start from the root dir */
1958 #endif
1959 if( (UINT) * path < ' ' )
1960 { /* Null path means the start directory itself */
1961 res = dir_seek( dj, 0 );
1962 dj->dir = NULL;
1963 }
1964 else
1965 { /* Follow path */
1966 for( ;; )
1967 {
1968 res = create_name( dj, &path ); /* Get a segment */
1969 if( res != FR_OK )
1970 {
1971 break;
1972 }
1973
1974 res = dir_find( dj ); /* Find it */
1975 last = *( dj->fn + NS ) & NS_LAST;
1976 if( res != FR_OK )
1977 { /* Could not find the object */
1978 if( res == FR_NO_FILE && !last )
1979 {
1980 res = FR_NO_PATH;
1981 }
1982
1983 break;
1984 }
1985
1986 if( last )
1987 {
1988 break; /* Last segment match. Function completed. */
1989 }
1990
1991 dir = dj->dir; /* There is next segment. Follow the sub directory */
1992 if( !(dir[DIR_Attr] & AM_DIR) )
1993 { /* Cannot follow because it is a file */
1994 res = FR_NO_PATH;
1995 break;
1996 }
1997
1998 dj->sclust = ( (DWORD) LD_WORD(dir + DIR_FstClusHI) << 16 ) | LD_WORD( dir + DIR_FstClusLO );
1999 }
2000 }
2001
2002 return res;
2003 }
2004
2005 /*-----------------------------------------------------------------------*/
2006
2007 /* Load boot record and check if it is an FAT boot record */
2008
2009 /*-----------------------------------------------------------------------*/
2010 static BYTE check_fs
2011 ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */
2012 FATFS *fs, /* File system object */
2013 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
2014 )
2015 {
2016 if( disk_read(fs->drive, fs->win, sect, 1) != RES_OK )
2017 { /* Load boot record */
2018 return 3;
2019 }
2020
2021 if( LD_WORD(&fs->win[BS_55AA]) != 0xAA55 )
2022 { /* Check record signature (always placed at offset 510 even if the sector size is >512) */
2023 return 2;
2024 }
2025
2026 if( (LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146 )
2027 { /* Check "FAT" string */
2028 return 0;
2029 }
2030
2031 if( (LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146 )
2032 {
2033 return 0;
2034 }
2035
2036 return 1;
2037 }
2038
2039 /*-----------------------------------------------------------------------*/
2040
2041 /* Make sure that the file system is valid */
2042
2043 /*-----------------------------------------------------------------------*/
2044 FRESULT chk_mounted
2045 ( /* FR_OK(0): successful, !=0: any error occured */
2046 const XCHAR **path, /* Pointer to pointer to the path name (drive number) */
2047 FATFS **rfs, /* Pointer to pointer to the found file system object */
2048 BYTE chk_wp /* !=0: Check media write protection for write access */
2049 )
2050 {
2051 BYTE fmt, *tbl;
2052 UINT vol;
2053 DSTATUS stat;
2054 DWORD bsect, fsize, tsect, mclst;
2055 const XCHAR *p = *path;
2056 FATFS *fs;
2057
2058 /* Get logical drive number from the path name */
2059 vol = p[0] - '0'; /* Is there a drive number? */
2060 if( vol <= 9 && p[1] == ':' )
2061 { /* Found a drive number, get and strip it */
2062 p += 2;
2063 *path = p; /* Return pointer to the path name */
2064 }
2065 else
2066 { /* No drive number is given */
2067 #if _FS_RPATH
2068 vol = Drive; /* Use current drive */
2069 #else
2070 vol = 0; /* Use drive 0 */
2071 #endif
2072 }
2073
2074 /* Check if the logical drive is valid or not */
2075 if( vol >= _DRIVES )
2076 { /* Is the drive number valid? */
2077 return FR_INVALID_DRIVE;
2078 }
2079
2080 *rfs = fs = FatFs[vol]; /* Returen pointer to the corresponding file system object */
2081 if( !fs )
2082 {
2083 return FR_NOT_ENABLED; /* Is the file system object available? */
2084 }
2085
2086 ENTER_FF( fs ); /* Lock file system */
2087
2088 if( fs->fs_type )
2089 { /* If the logical drive has been mounted */
2090 stat = disk_status( fs->drive );
2091 if( !(stat & STA_NOINIT) )
2092 { /* and the physical drive is kept initialized (has not been changed), */
2093 #if !_FS_READONLY
2094 if( chk_wp && (stat & STA_PROTECT) )
2095 { /* Check write protection if needed */
2096 return FR_WRITE_PROTECTED;
2097 }
2098
2099 #endif
2100 return FR_OK; /* The file system object is valid */
2101 }
2102 }
2103
2104 /* The logical drive must be mounted. Following code attempts to mount the volume */
2105 fs->fs_type = 0; /* Clear the file system object */
2106 fs->drive = ( BYTE ) LD2PD( vol ); /* Bind the logical drive and a physical drive */
2107 stat = disk_initialize( fs->drive ); /* Initialize low level disk I/O layer */
2108 if( stat & STA_NOINIT )
2109 { /* Check if the drive is ready */
2110 return FR_NOT_READY;
2111 }
2112
2113 #if _MAX_SS != 512 /* Get disk sector size if needed */
2114 if( disk_ioctl(fs->drive, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS )
2115 {
2116 return FR_NO_FILESYSTEM;
2117 }
2118
2119 #endif
2120 #if !_FS_READONLY
2121 if( chk_wp && (stat & STA_PROTECT) )
2122 { /* Check disk write protection if needed */
2123 return FR_WRITE_PROTECTED;
2124 }
2125
2126 #endif
2127
2128 /* Search FAT partition on the drive */
2129 fmt = check_fs( fs, bsect = 0 ); /* Check sector 0 as an SFD format */
2130 if( fmt == 1 )
2131 { /* Not an FAT boot record, it may be patitioned */
2132 /* Check a partition listed in top of the partition table */
2133 tbl = &fs->win[MBR_Table + LD2PT( vol ) * 16]; /* Partition table */
2134 if( tbl[4] )
2135 { /* Is the partition existing? */
2136 bsect = LD_DWORD( &tbl[8] ); /* Partition offset in LBA */
2137 fmt = check_fs( fs, bsect ); /* Check the partition */
2138 }
2139 }
2140
2141 if( fmt == 3 )
2142 {
2143 return FR_DISK_ERR;
2144 }
2145
2146 if( fmt || LD_WORD(fs->win + BPB_BytsPerSec) != SS(fs) )
2147 { /* No valid FAT patition is found */
2148 return FR_NO_FILESYSTEM;
2149 }
2150
2151 /* Initialize the file system object */
2152 fsize = LD_WORD( fs->win + BPB_FATSz16 ); /* Number of sectors per FAT */
2153 if( !fsize )
2154 {
2155 fsize = LD_DWORD( fs->win + BPB_FATSz32 );
2156 }
2157
2158 fs->sects_fat = fsize;
2159 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
2160 fsize *= fs->n_fats; /* (Number of sectors in FAT area) */
2161 fs->fatbase = bsect + LD_WORD( fs->win + BPB_RsvdSecCnt ); /* FAT start sector (lba) */
2162 fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
2163 fs->n_rootdir = LD_WORD( fs->win + BPB_RootEntCnt ); /* Nmuber of root directory entries */
2164 tsect = LD_WORD( fs->win + BPB_TotSec16 ); /* Number of sectors on the volume */
2165 if( !tsect )
2166 {
2167 tsect = LD_DWORD( fs->win + BPB_TotSec32 );
2168 }
2169
2170 fs->max_clust = mclst =
2171 (
2172 tsect /* Last cluster# + 1 (Number of clusters + 2) */ -
2173 LD_WORD(fs->win + BPB_RsvdSecCnt) -
2174 fsize -
2175 fs->n_rootdir /
2176 (SS(fs) / 32)
2177 ) /
2178 fs->csize +
2179 2;
2180
2181 fmt = FS_FAT12; /* Determine the FAT sub type */
2182 if( mclst >= 0xFF7 )
2183 {
2184 fmt = FS_FAT16; /* Number of clusters >= 0xFF5 */
2185 }
2186
2187 if( mclst >= 0xFFF7 )
2188 {
2189 fmt = FS_FAT32; /* Number of clusters >= 0xFFF5 */
2190 }
2191
2192 if( fmt == FS_FAT32 )
2193 {
2194 fs->dirbase = LD_DWORD( fs->win + BPB_RootClus ); /* Root directory start cluster */
2195 }
2196 else
2197 {
2198 fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */
2199 }
2200
2201 fs->database = fs->fatbase + fsize + fs->n_rootdir / ( SS(fs) / 32 ); /* Data start sector (lba) */
2202
2203 #if !_FS_READONLY
2204
2205 /* Initialize allocation information */
2206 fs->free_clust = 0xFFFFFFFF;
2207 fs->wflag = 0;
2208
2209 /* Get fsinfo if needed */
2210 if( fmt == FS_FAT32 )
2211 {
2212 fs->fsi_flag = 0;
2213 fs->fsi_sector = bsect + LD_WORD( fs->win + BPB_FSInfo );
2214 if
2215 (
2216 disk_read(fs->drive, fs->win, fs->fsi_sector, 1) == RES_OK &&
2217 LD_WORD(fs->win + BS_55AA) == 0xAA55 &&
2218 LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252 &&
2219 LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272
2220 )
2221 {
2222 fs->last_clust = LD_DWORD( fs->win + FSI_Nxt_Free );
2223 fs->free_clust = LD_DWORD( fs->win + FSI_Free_Count );
2224 }
2225 }
2226
2227 #endif
2228 fs->fs_type = fmt; /* FAT sub-type */
2229 fs->winsect = 0; /* Invalidate sector cache */
2230 #if _FS_RPATH
2231 fs->cdir = 0; /* Current directory (root dir) */
2232 #endif
2233 fs->id = ++Fsid; /* File system mount ID */
2234
2235 return FR_OK;
2236 }
2237
2238 /*-----------------------------------------------------------------------*/
2239
2240 /* Check if the file/dir object is valid or not */
2241
2242 /*-----------------------------------------------------------------------*/
2243 static FRESULT validate
2244 ( /* FR_OK(0): The object is valid, !=0: Invalid */
2245 FATFS *fs, /* Pointer to the file system object */
2246 WORD id /* Member id of the target object to be checked */
2247 )
2248 {
2249 if( !fs || !fs->fs_type || fs->id != id )
2250 {
2251 return FR_INVALID_OBJECT;
2252 }
2253
2254 ENTER_FF( fs ); /* Lock file system */
2255
2256 if( disk_status(fs->drive) & STA_NOINIT )
2257 {
2258 return FR_NOT_READY;
2259 }
2260
2261 return FR_OK;
2262 }
2263
2264 /*--------------------------------------------------------------------------
2265
2266 Public Functions
2267
2268 --------------------------------------------------------------------------*/
2269
2270 /*-----------------------------------------------------------------------*/
2271
2272 /* Mount/Unmount a Locical Drive */
2273
2274 /*-----------------------------------------------------------------------*/
2275 FRESULT f_mount
2276 (
2277 BYTE vol, /* Logical drive number to be mounted/unmounted */
2278 FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
2279 )
2280 {
2281 FATFS *rfs;
2282
2283 if( vol >= _DRIVES )
2284 { /* Check if the drive number is valid */
2285 return FR_INVALID_DRIVE;
2286 }
2287
2288 rfs = FatFs[vol]; /* Get current fs object */
2289
2290 if( rfs )
2291 {
2292 #if _FS_REENTRANT /* Discard sync object of the current volume */
2293 if( !ff_del_syncobj(rfs->sobj) )
2294 {
2295 return FR_INT_ERR;
2296 }
2297
2298 #endif
2299 rfs->fs_type = 0; /* Clear old fs object */
2300 }
2301
2302 if( fs )
2303 {
2304 fs->fs_type = 0; /* Clear new fs object */
2305 #if _FS_REENTRANT /* Create sync object for the new volume */
2306 if( !ff_cre_syncobj(vol, &fs->sobj) )
2307 {
2308 return FR_INT_ERR;
2309 }
2310
2311 #endif
2312 }
2313
2314 FatFs[vol] = fs; /* Register new fs object */
2315
2316 return FR_OK;
2317 }
2318
2319 /*-----------------------------------------------------------------------*/
2320
2321 /* Open or Create a File */
2322
2323 /*-----------------------------------------------------------------------*/
2324 FRESULT f_open
2325 (
2326 FIL *fp, /* Pointer to the blank file object */
2327 const XCHAR *path, /* Pointer to the file name */
2328 BYTE mode /* Access mode and file open mode flags */
2329 )
2330 {
2331 FRESULT res;
2332 DIR dj;
2333 NAMEBUF( sfn, lfn );
2334
2335 BYTE *dir;
2336
2337 fp->fs = NULL; /* Clear file object */
2338 #if !_FS_READONLY
2339 mode &= ( FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW );
2340 res = chk_mounted( &path, &dj.fs, (BYTE) (mode & (FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) );
2341 #else
2342 mode &= FA_READ;
2343 res = chk_mounted( &path, &dj.fs, 0 );
2344 #endif
2345 if( res != FR_OK )
2346 {
2347 LEAVE_FF( dj.fs, res );
2348 }
2349
2350 INITBUF( dj, sfn, lfn );
2351 res = follow_path( &dj, path ); /* Follow the file path */
2352
2353 #if !_FS_READONLY
2354
2355 /* Create or Open a file */
2356 if( mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW) )
2357 {
2358 DWORD ps, cl;
2359
2360 if( res != FR_OK )
2361 { /* No file, create new */
2362 if( res == FR_NO_FILE )
2363 { /* There is no file to open, create a new entry */
2364 res = dir_register( &dj );
2365 }
2366
2367 if( res != FR_OK )
2368 {
2369 LEAVE_FF( dj.fs, res );
2370 }
2371
2372 mode |= FA_CREATE_ALWAYS;
2373 dir = dj.dir; /* Created entry (SFN entry) */
2374 }
2375 else
2376 { /* Any object is already existing */
2377 if( mode & FA_CREATE_NEW )
2378 { /* Cannot create new */
2379 LEAVE_FF( dj.fs, FR_EXIST );
2380 }
2381
2382 dir = dj.dir;
2383 if( !dir || (dir[DIR_Attr] & (AM_RDO | AM_DIR)) )
2384 { /* Cannot overwrite it (R/O or DIR) */
2385 LEAVE_FF( dj.fs, FR_DENIED );
2386 }
2387
2388 if( mode & FA_CREATE_ALWAYS )
2389 { /* Resize it to zero on over write mode */
2390 cl = ( (DWORD) LD_WORD(dir + DIR_FstClusHI) << 16 ) | LD_WORD( dir + DIR_FstClusLO ); /* Get start cluster */
2391 ST_WORD( dir + DIR_FstClusHI, 0 ); /* cluster = 0 */
2392 ST_WORD( dir + DIR_FstClusLO, 0 );
2393 ST_DWORD( dir + DIR_FileSize, 0 ); /* size = 0 */
2394 dj.fs->wflag = 1;
2395 ps = dj.fs->winsect; /* Remove the cluster chain */
2396 if( cl )
2397 {
2398 res = remove_chain( dj.fs, cl );
2399 if( res )
2400 {
2401 LEAVE_FF( dj.fs, res );
2402 }
2403
2404 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
2405 }
2406
2407 res = move_window( dj.fs, ps );
2408 if( res != FR_OK )
2409 {
2410 LEAVE_FF( dj.fs, res );
2411 }
2412 }
2413 }
2414
2415 if( mode & FA_CREATE_ALWAYS )
2416 {
2417 dir[DIR_Attr] = 0; /* Reset attribute */
2418 ps = get_fattime();
2419 ST_DWORD( dir + DIR_CrtTime, ps ); /* Created time */
2420 dj.fs->wflag = 1;
2421 mode |= FA__WRITTEN; /* Set file changed flag */
2422 }
2423 }
2424
2425 /* Open an existing file */
2426 else
2427 {
2428 #endif /* !_FS_READONLY */
2429 if( res != FR_OK )
2430 {
2431 LEAVE_FF( dj.fs, res ); /* Follow failed */
2432 }
2433
2434 dir = dj.dir;
2435 if( !dir || (dir[DIR_Attr] & AM_DIR) )
2436 { /* It is a directory */
2437 LEAVE_FF( dj.fs, FR_NO_FILE );
2438 }
2439
2440 #if !_FS_READONLY
2441 if( (mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO) )
2442 { /* R/O violation */
2443 LEAVE_FF( dj.fs, FR_DENIED );
2444 }
2445 }
2446
2447 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
2448 fp->dir_ptr = dj.dir;
2449 #endif
2450 fp->flag = mode; /* File access mode */
2451 fp->org_clust = /* File start cluster */
2452 ( (DWORD) LD_WORD(dir + DIR_FstClusHI) << 16 ) | LD_WORD( dir + DIR_FstClusLO );
2453 fp->fsize = LD_DWORD( dir + DIR_FileSize ); /* File size */
2454 fp->fptr = 0;
2455 fp->csect = 255; /* File pointer */
2456 fp->dsect = 0;
2457 fp->fs = dj.fs;
2458 fp->id = dj.fs->id; /* Owner file system object of the file */
2459
2460 LEAVE_FF( dj.fs, FR_OK );
2461 }
2462
2463 /*-----------------------------------------------------------------------*/
2464
2465 /* Read File */
2466
2467 /*-----------------------------------------------------------------------*/
2468 FRESULT f_read
2469 (
2470 FIL *fp, /* Pointer to the file object */
2471 void *buff, /* Pointer to data buffer */
2472 UINT btr, /* Number of bytes to read */
2473 UINT *br /* Pointer to number of bytes read */
2474 )
2475 {
2476 FRESULT res;
2477 DWORD clst, sect, remain;
2478 UINT rcnt, cc;
2479 BYTE *rbuff = buff;
2480
2481 *br = 0; /* Initialize bytes read */
2482
2483 res = validate( fp->fs, fp->id ); /* Check validity of the object */
2484 if( res != FR_OK )
2485 {
2486 LEAVE_FF( fp->fs, res );
2487 }
2488
2489 if( fp->flag & FA__ERROR )
2490 { /* Check abort flag */
2491 LEAVE_FF( fp->fs, FR_INT_ERR );
2492 }
2493
2494 if( !(fp->flag & FA_READ) )
2495 { /* Check access mode */
2496 LEAVE_FF( fp->fs, FR_DENIED );
2497 }
2498
2499 remain = fp->fsize - fp->fptr;
2500 if( btr > remain )
2501 {
2502 btr = ( UINT ) remain; /* Truncate btr by remaining bytes */
2503 }
2504
2505 for( ; btr; /* Repeat until all data transferred */ rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt )
2506 {
2507 if( (fp->fptr % SS(fp->fs)) == 0 )
2508 { /* On the sector boundary? */
2509 if( fp->csect >= fp->fs->csize )
2510 { /* On the cluster boundary? */
2511 clst = ( fp->fptr == 0 ) ? /* On the top of the file? */
2512 fp->org_clust : get_fat( fp->fs, fp->curr_clust );
2513 if( clst <= 1 )
2514 {
2515 ABORT( fp->fs, FR_INT_ERR );
2516 }
2517
2518 if( clst == 0xFFFFFFFF )
2519 {
2520 ABORT( fp->fs, FR_DISK_ERR );
2521 }
2522
2523 fp->curr_clust = clst; /* Update current cluster */
2524 fp->csect = 0; /* Reset sector offset in the cluster */
2525 }
2526
2527 sect = clust2sect( fp->fs, fp->curr_clust ); /* Get current sector */
2528 if( !sect )
2529 {
2530 ABORT( fp->fs, FR_INT_ERR );
2531 }
2532
2533 sect += fp->csect;
2534 cc = btr / SS( fp->fs ); /* When remaining bytes >= sector size, */
2535 if( cc )
2536 { /* Read maximum contiguous sectors directly */
2537 if( fp->csect + cc > fp->fs->csize )
2538 { /* Clip at cluster boundary */
2539 cc = fp->fs->csize - fp->csect;
2540 }
2541
2542 if( disk_read(fp->fs->drive, rbuff, sect, (BYTE) cc) != RES_OK )
2543 {
2544 ABORT( fp->fs, FR_DISK_ERR );
2545 }
2546
2547 #if !_FS_READONLY && _FS_MINIMIZE <= 2
2548 #if _FS_TINY
2549 if( fp->fs->wflag && fp->fs->winsect - sect < cc )
2550 { /* Replace one of the read sectors with cached data if it contains a dirty sector */
2551 mem_cpy( rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs) );
2552 }
2553
2554 #else
2555 if( (fp->flag & FA__DIRTY) && fp->dsect - sect < cc )
2556 { /* Replace one of the read sectors with cached data if it contains a dirty sector */
2557 mem_cpy( rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs) );
2558 }
2559
2560 #endif
2561 #endif
2562 fp->csect += ( BYTE ) cc; /* Next sector address in the cluster */
2563 rcnt = SS( fp->fs ) * cc; /* Number of bytes transferred */
2564 continue;
2565 }
2566
2567 #if !_FS_TINY
2568 #if !_FS_READONLY
2569 if( fp->flag & FA__DIRTY )
2570 { /* Write sector I/O buffer if needed */
2571 if( disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK )
2572 {
2573 ABORT( fp->fs, FR_DISK_ERR );
2574 }
2575
2576 fp->flag &= ~FA__DIRTY;
2577 }
2578
2579 #endif
2580 if( fp->dsect != sect )
2581 { /* Fill sector buffer with file data */
2582 if( disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK )
2583 {
2584 ABORT( fp->fs, FR_DISK_ERR );
2585 }
2586 }
2587
2588 #endif
2589 fp->dsect = sect;
2590 fp->csect++; /* Next sector address in the cluster */
2591 }
2592
2593 rcnt = SS( fp->fs ) - ( fp->fptr % SS(fp->fs) ); /* Get partial sector data from sector buffer */
2594 if( rcnt > btr )
2595 {
2596 rcnt = btr;
2597 }
2598
2599 #if _FS_TINY
2600 if( move_window(fp->fs, fp->dsect) )
2601 { /* Move sector window */
2602 ABORT( fp->fs, FR_DISK_ERR );
2603 }
2604
2605 mem_cpy( rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt ); /* Pick partial sector */
2606 #else
2607 mem_cpy( rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt ); /* Pick partial sector */
2608 #endif
2609 }
2610
2611 LEAVE_FF( fp->fs, FR_OK );
2612 }
2613
2614 #if !_FS_READONLY
2615
2616 /*-----------------------------------------------------------------------*/
2617
2618 /* Write File */
2619
2620 /*-----------------------------------------------------------------------*/
2621 FRESULT f_write
2622 (
2623 FIL *fp, /* Pointer to the file object */
2624 const void *buff, /* Pointer to the data to be written */
2625 UINT btw, /* Number of bytes to write */
2626 UINT *bw /* Pointer to number of bytes written */
2627 )
2628 {
2629 FRESULT res;
2630 DWORD clst, sect;
2631 UINT wcnt, cc;
2632 const BYTE *wbuff = buff;
2633
2634 *bw = 0; /* Initialize bytes written */
2635
2636 res = validate( fp->fs, fp->id ); /* Check validity of the object */
2637 if( res != FR_OK )
2638 {
2639 LEAVE_FF( fp->fs, res );
2640 }
2641
2642 if( fp->flag & FA__ERROR )
2643 { /* Check abort flag */
2644 LEAVE_FF( fp->fs, FR_INT_ERR );
2645 }
2646
2647 if( !(fp->flag & FA_WRITE) )
2648 { /* Check access mode */
2649 LEAVE_FF( fp->fs, FR_DENIED );
2650 }
2651
2652 if( fp->fsize + btw < fp->fsize )
2653 {
2654 btw = 0; /* File size cannot reach 4GB */
2655 }
2656
2657 for( ; btw; /* Repeat until all data transferred */ wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt )
2658 {
2659 if( (fp->fptr % SS(fp->fs)) == 0 )
2660 { /* On the sector boundary? */
2661 if( fp->csect >= fp->fs->csize )
2662 { /* On the cluster boundary? */
2663 if( fp->fptr == 0 )
2664 { /* On the top of the file? */
2665 clst = fp->org_clust; /* Follow from the origin */
2666 if( clst == 0 )
2667 { /* When there is no cluster chain, */
2668 fp->org_clust = clst = create_chain( fp->fs, 0 ); /* Create a new cluster chain */
2669 }
2670 }
2671 else
2672 { /* Middle or end of the file */
2673 clst = create_chain( fp->fs, fp->curr_clust ); /* Follow or streach cluster chain */
2674 }
2675
2676 if( clst == 0 )
2677 {
2678 break; /* Could not allocate a new cluster (disk full) */
2679 }
2680
2681 if( clst == 1 )
2682 {
2683 ABORT( fp->fs, FR_INT_ERR );
2684 }
2685
2686 if( clst == 0xFFFFFFFF )
2687 {
2688 ABORT( fp->fs, FR_DISK_ERR );
2689 }
2690
2691 fp->curr_clust = clst; /* Update current cluster */
2692 fp->csect = 0; /* Reset sector address in the cluster */
2693 }
2694
2695 #if _FS_TINY
2696 if( fp->fs->winsect == fp->dsect && move_window(fp->fs, 0) )
2697 { /* Write back data buffer prior to following direct transfer */
2698 ABORT( fp->fs, FR_DISK_ERR );
2699 }
2700
2701 #else
2702 if( fp->flag & FA__DIRTY )
2703 { /* Write back data buffer prior to following direct transfer */
2704 if( disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK )
2705 {
2706 ABORT( fp->fs, FR_DISK_ERR );
2707 }
2708
2709 fp->flag &= ~FA__DIRTY;
2710 }
2711
2712 #endif
2713 sect = clust2sect( fp->fs, fp->curr_clust ); /* Get current sector */
2714 if( !sect )
2715 {
2716 ABORT( fp->fs, FR_INT_ERR );
2717 }
2718
2719 sect += fp->csect;
2720 cc = btw / SS( fp->fs ); /* When remaining bytes >= sector size, */
2721 if( cc )
2722 { /* Write maximum contiguous sectors directly */
2723 if( fp->csect + cc > fp->fs->csize )
2724 { /* Clip at cluster boundary */
2725 cc = fp->fs->csize - fp->csect;
2726 }
2727
2728 if( disk_write(fp->fs->drive, wbuff, sect, (BYTE) cc) != RES_OK )
2729 {
2730 ABORT( fp->fs, FR_DISK_ERR );
2731 }
2732
2733 #if _FS_TINY
2734 if( fp->fs->winsect - sect < cc )
2735 { /* Refill sector cache if it gets dirty by the direct write */
2736 mem_cpy( fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs) );
2737 fp->fs->wflag = 0;
2738 }
2739
2740 #else
2741 if( fp->dsect - sect < cc )
2742 { /* Refill sector cache if it gets dirty by the direct write */
2743 mem_cpy( fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs) );
2744 fp->flag &= ~FA__DIRTY;
2745 }
2746
2747 #endif
2748 fp->csect += ( BYTE ) cc; /* Next sector address in the cluster */
2749 wcnt = SS( fp->fs ) * cc; /* Number of bytes transferred */
2750 continue;
2751 }
2752
2753 #if _FS_TINY
2754 if( fp->fptr >= fp->fsize )
2755 { /* Avoid silly buffer filling at growing edge */
2756 if( move_window(fp->fs, 0) )
2757 {
2758 ABORT( fp->fs, FR_DISK_ERR );
2759 }
2760
2761 fp->fs->winsect = sect;
2762 }
2763
2764 #else
2765 if( fp->dsect != sect )
2766 { /* Fill sector buffer with file data */
2767 if( fp->fptr < fp->fsize && disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK )
2768 {
2769 ABORT( fp->fs, FR_DISK_ERR );
2770 }
2771 }
2772
2773 #endif
2774 fp->dsect = sect;
2775 fp->csect++; /* Next sector address in the cluster */
2776 }
2777
2778 wcnt = SS( fp->fs ) - ( fp->fptr % SS(fp->fs) ); /* Put partial sector into file I/O buffer */
2779 if( wcnt > btw )
2780 {
2781 wcnt = btw;
2782 }
2783
2784 #if _FS_TINY
2785 if( move_window(fp->fs, fp->dsect) )
2786 { /* Move sector window */
2787 ABORT( fp->fs, FR_DISK_ERR );
2788 }
2789
2790 mem_cpy( &fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt ); /* Fit partial sector */
2791 fp->fs->wflag = 1;
2792 #else
2793 mem_cpy( &fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt ); /* Fit partial sector */
2794 fp->flag |= FA__DIRTY;
2795 #endif
2796 }
2797
2798 if( fp->fptr > fp->fsize )
2799 {
2800 fp->fsize = fp->fptr; /* Update file size if needed */
2801 }
2802
2803 fp->flag |= FA__WRITTEN; /* Set file changed flag */
2804
2805 LEAVE_FF( fp->fs, FR_OK );
2806 }
2807
2808 /*-----------------------------------------------------------------------*/
2809
2810 /* Synchronize the File Object */
2811
2812 /*-----------------------------------------------------------------------*/
2813 FRESULT f_sync( FIL *fp /* Pointer to the file object */ )
2814 {
2815 FRESULT res;
2816 DWORD tim;
2817 BYTE *dir;
2818
2819 res = validate( fp->fs, fp->id ); /* Check validity of the object */
2820 if( res == FR_OK )
2821 {
2822 if( fp->flag & FA__WRITTEN )
2823 { /* Has the file been written? */
2824 #if !_FS_TINY /* Write-back dirty buffer */
2825 if( fp->flag & FA__DIRTY )
2826 {
2827 if( disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK )
2828 {
2829 LEAVE_FF( fp->fs, FR_DISK_ERR );
2830 }
2831
2832 fp->flag &= ~FA__DIRTY;
2833 }
2834
2835 #endif
2836
2837 /* Update the directory entry */
2838 res = move_window( fp->fs, fp->dir_sect );
2839 if( res == FR_OK )
2840 {
2841 dir = fp->dir_ptr;
2842 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
2843 ST_DWORD( dir + DIR_FileSize, fp->fsize ); /* Update file size */
2844 ST_WORD( dir + DIR_FstClusLO, fp->org_clust ); /* Update start cluster */
2845 ST_WORD( dir + DIR_FstClusHI, fp->org_clust >> 16 );
2846 tim = get_fattime(); /* Updated time */
2847 ST_DWORD( dir + DIR_WrtTime, tim );
2848 fp->flag &= ~FA__WRITTEN;
2849 fp->fs->wflag = 1;
2850 res = sync( fp->fs );
2851 }
2852 }
2853 }
2854
2855 LEAVE_FF( fp->fs, res );
2856 }
2857
2858 #endif /* !_FS_READONLY */
2859
2860 /*-----------------------------------------------------------------------*/
2861
2862 /* Close File */
2863
2864 /*-----------------------------------------------------------------------*/
2865 FRESULT f_close( FIL *fp /* Pointer to the file object to be closed */ )
2866 {
2867 FRESULT res;
2868
2869 #if _FS_READONLY
2870 res = validate( fp->fs, fp->id );
2871 if( res == FR_OK )
2872 {
2873 fp->fs = NULL;
2874 }
2875
2876 LEAVE_FF( fp->fs, res );
2877 #else
2878 res = f_sync( fp );
2879 if( res == FR_OK )
2880 {
2881 fp->fs = NULL;
2882 }
2883
2884 return res;
2885 #endif
2886 }
2887
2888 /*-----------------------------------------------------------------------*/
2889
2890 /* Change Current Drive/Directory */
2891
2892 /*-----------------------------------------------------------------------*/
2893 #if _FS_RPATH
2894 FRESULT f_chdrive( BYTE drv /* Drive number */ )
2895 {
2896 if( drv >= _DRIVES )
2897 {
2898 return FR_INVALID_DRIVE;
2899 }
2900
2901 Drive = drv;
2902
2903 return FR_OK;
2904 }
2905
2906 FRESULT f_chdir( const XCHAR *path /* Pointer to the directory path */ )
2907 {
2908 FRESULT res;
2909 DIR dj;
2910 NAMEBUF( sfn, lfn );
2911
2912 BYTE *dir;
2913
2914 res = chk_mounted( &path, &dj.fs, 0 );
2915 if( res == FR_OK )
2916 {
2917 INITBUF( dj, sfn, lfn );
2918 res = follow_path( &dj, path ); /* Follow the file path */
2919 if( res == FR_OK )
2920 { /* Follow completed */
2921 dir = dj.dir; /* Pointer to the entry */
2922 if( !dir )
2923 {
2924 dj.fs->cdir = 0; /* No entry (root dir) */
2925 }
2926 else
2927 {
2928 if( dir[DIR_Attr] & AM_DIR )
2929 { /* Reached to the dir */
2930 dj.fs->cdir = ( (DWORD) LD_WORD(dir + DIR_FstClusHI) << 16 ) | LD_WORD( dir + DIR_FstClusLO );
2931 }
2932 else
2933 {
2934 res = FR_NO_PATH; /* Could not reach the dir (it is a file) */
2935 }
2936 }
2937 }
2938
2939 if( res == FR_NO_FILE )
2940 {
2941 res = FR_NO_PATH;
2942 }
2943 }
2944
2945 LEAVE_FF( dj.fs, res );
2946 }
2947
2948 #endif
2949 #if _FS_MINIMIZE <= 2
2950
2951 /*-----------------------------------------------------------------------*/
2952
2953 /* Seek File R/W Pointer */
2954
2955 /*-----------------------------------------------------------------------*/
2956 FRESULT f_lseek( FIL *fp, /* Pointer to the file object */ DWORD ofs /* File pointer from top of file */ )
2957 {
2958 FRESULT res;
2959 DWORD clst, bcs, nsect, ifptr;
2960
2961 res = validate( fp->fs, fp->id ); /* Check validity of the object */
2962 if( res != FR_OK )
2963 {
2964 LEAVE_FF( fp->fs, res );
2965 }
2966
2967 if( fp->flag & FA__ERROR )
2968 { /* Check abort flag */
2969 LEAVE_FF( fp->fs, FR_INT_ERR );
2970 }
2971
2972 if( ofs > fp->fsize /* In read-only mode, clip offset with the file size */
2973 #if !_FS_READONLY
2974 && !(fp->flag & FA_WRITE)
2975 #endif
2976 )
2977 {
2978 ofs = fp->fsize;
2979 }
2980
2981 ifptr = fp->fptr;
2982 fp->fptr = nsect = 0;
2983 fp->csect = 255;
2984 if( ofs > 0 )
2985 {
2986 bcs = ( DWORD ) fp->fs->csize * SS( fp->fs ); /* Cluster size (byte) */
2987 if( ifptr > 0 && (ofs - 1) / bcs >= (ifptr - 1) / bcs )
2988 { /* When seek to same or following cluster, */
2989 fp->fptr = ( ifptr - 1 ) &~( bcs - 1 ); /* start from the current cluster */
2990 ofs -= fp->fptr;
2991 clst = fp->curr_clust;
2992 }
2993 else
2994 { /* When seek to back cluster, */
2995 clst = fp->org_clust; /* start from the first cluster */
2996 #if !_FS_READONLY
2997 if( clst == 0 )
2998 { /* If no cluster chain, create a new chain */
2999 clst = create_chain( fp->fs, 0 );
3000 if( clst == 1 )
3001 {
3002 ABORT( fp->fs, FR_INT_ERR );
3003 }
3004
3005 if( clst == 0xFFFFFFFF )
3006 {
3007 ABORT( fp->fs, FR_DISK_ERR );
3008 }
3009
3010 fp->org_clust = clst;
3011 }
3012
3013 #endif
3014 fp->curr_clust = clst;
3015 }
3016
3017 if( clst != 0 )
3018 {
3019 while( ofs > bcs )
3020 { /* Cluster following loop */
3021 #if !_FS_READONLY
3022 if( fp->flag & FA_WRITE )
3023 { /* Check if in write mode or not */
3024 clst = create_chain( fp->fs, clst ); /* Force streached if in write mode */
3025 if( clst == 0 )
3026 { /* When disk gets full, clip file size */
3027 ofs = bcs;
3028 break;
3029 }
3030 }
3031 else
3032 #endif
3033 clst = get_fat( fp->fs, clst ); /* Follow cluster chain if not in write mode */
3034 if( clst == 0xFFFFFFFF )
3035 {
3036 ABORT( fp->fs, FR_DISK_ERR );
3037 }
3038
3039 if( clst <= 1 || clst >= fp->fs->max_clust )
3040 {
3041 ABORT( fp->fs, FR_INT_ERR );
3042 }
3043
3044 fp->curr_clust = clst;
3045 fp->fptr += bcs;
3046 ofs -= bcs;
3047 }
3048
3049 fp->fptr += ofs;
3050 fp->csect = ( BYTE ) ( ofs / SS(fp->fs) ); /* Sector offset in the cluster */
3051 if( ofs % SS(fp->fs) )
3052 {
3053 nsect = clust2sect( fp->fs, clst ); /* Current sector */
3054 if( !nsect )
3055 {
3056 ABORT( fp->fs, FR_INT_ERR );
3057 }
3058
3059 nsect += fp->csect;
3060 fp->csect++;
3061 }
3062 }
3063 }
3064
3065 if( fp->fptr % SS(fp->fs) && nsect != fp->dsect )
3066 {
3067 #if !_FS_TINY
3068 #if !_FS_READONLY
3069 if( fp->flag & FA__DIRTY )
3070 { /* Write-back dirty buffer if needed */
3071 if( disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK )
3072 {
3073 ABORT( fp->fs, FR_DISK_ERR );
3074 }
3075
3076 fp->flag &= ~FA__DIRTY;
3077 }
3078
3079 #endif
3080 if( disk_read(fp->fs->drive, fp->buf, nsect, 1) != RES_OK )
3081 {
3082 ABORT( fp->fs, FR_DISK_ERR );
3083 }
3084
3085 #endif
3086 fp->dsect = nsect;
3087 }
3088
3089 #if !_FS_READONLY
3090 if( fp->fptr > fp->fsize )
3091 { /* Set changed flag if the file size is extended */
3092 fp->fsize = fp->fptr;
3093 fp->flag |= FA__WRITTEN;
3094 }
3095
3096 #endif
3097 LEAVE_FF( fp->fs, res );
3098 }
3099
3100 #if _FS_MINIMIZE <= 1
3101
3102 /*-----------------------------------------------------------------------*/
3103
3104 /* Create a Directroy Object */
3105
3106 /*-----------------------------------------------------------------------*/
3107 FRESULT f_opendir( DIR *dj, /* Pointer to directory object to create */ const XCHAR *path /* Pointer to the directory path */ )
3108 {
3109 FRESULT res;
3110 NAMEBUF( sfn, lfn );
3111
3112 BYTE *dir;
3113
3114 res = chk_mounted( &path, &dj->fs, 0 );
3115 if( res == FR_OK )
3116 {
3117 INITBUF( (*dj), sfn, lfn );
3118 res = follow_path( dj, path ); /* Follow the path to the directory */
3119 if( res == FR_OK )
3120 { /* Follow completed */
3121 dir = dj->dir;
3122 if( dir )
3123 { /* It is not the root dir */
3124 if( dir[DIR_Attr] & AM_DIR )
3125 { /* The object is a directory */
3126 dj->sclust = ( (DWORD) LD_WORD(dir + DIR_FstClusHI) << 16 ) | LD_WORD( dir + DIR_FstClusLO );
3127 }
3128 else
3129 { /* The object is not a directory */
3130 res = FR_NO_PATH;
3131 }
3132 }
3133
3134 if( res == FR_OK )
3135 {
3136 dj->id = dj->fs->id;
3137 res = dir_seek( dj, 0 ); /* Rewind dir */
3138 }
3139 }
3140
3141 if( res == FR_NO_FILE )
3142 {
3143 res = FR_NO_PATH;
3144 }
3145 }
3146
3147 LEAVE_FF( dj->fs, res );
3148 }
3149
3150 /*-----------------------------------------------------------------------*/
3151
3152 /* Read Directory Entry in Sequense */
3153
3154 /*-----------------------------------------------------------------------*/
3155 FRESULT f_readdir( DIR *dj, /* Pointer to the open directory object */ FILINFO *fno /* Pointer to file information to return */ )
3156 {
3157 FRESULT res;
3158 NAMEBUF( sfn, lfn );
3159
3160 res = validate( dj->fs, dj->id ); /* Check validity of the object */
3161 if( res == FR_OK )
3162 {
3163 INITBUF( (*dj), sfn, lfn );
3164 if( !fno )
3165 {
3166 res = dir_seek( dj, 0 );
3167 }
3168 else
3169 {
3170 res = dir_read( dj );
3171 if( res == FR_NO_FILE )
3172 {
3173 dj->sect = 0;
3174 res = FR_OK;
3175 }
3176
3177 if( res == FR_OK )
3178 { /* A valid entry is found */
3179 get_fileinfo( dj, fno ); /* Get the object information */
3180 res = dir_next( dj, FALSE ); /* Increment index for next */
3181 if( res == FR_NO_FILE )
3182 {
3183 dj->sect = 0;
3184 res = FR_OK;
3185 }
3186 }
3187 }
3188 }
3189
3190 LEAVE_FF( dj->fs, res );
3191 }
3192
3193 #if _FS_MINIMIZE == 0
3194
3195 /*-----------------------------------------------------------------------*/
3196
3197 /* Get File Status */
3198
3199 /*-----------------------------------------------------------------------*/
3200 FRESULT f_stat( const XCHAR *path, /* Pointer to the file path */ FILINFO *fno /* Pointer to file information to return */ )
3201 {
3202 FRESULT res;
3203 DIR dj;
3204 NAMEBUF( sfn, lfn );
3205
3206 res = chk_mounted( &path, &dj.fs, 0 );
3207 if( res == FR_OK )
3208 {
3209 INITBUF( dj, sfn, lfn );
3210 res = follow_path( &dj, path ); /* Follow the file path */
3211 if( res == FR_OK )
3212 { /* Follwo completed */
3213 if( dj.dir )
3214 { /* Found an object */
3215 get_fileinfo( &dj, fno );
3216 }
3217 else
3218 { /* It is root dir */
3219 res = FR_INVALID_NAME;
3220 }
3221 }
3222 }
3223
3224 LEAVE_FF( dj.fs, res );
3225 }
3226
3227 #if !_FS_READONLY
3228
3229 /*-----------------------------------------------------------------------*/
3230
3231 /* Get Number of Free Clusters */
3232
3233 /*-----------------------------------------------------------------------*/
3234 FRESULT f_getfree
3235 (
3236 const XCHAR *path, /* Pointer to the logical drive number (root dir) */
3237 DWORD *nclst, /* Pointer to the variable to return number of free clusters */
3238 FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */
3239 )
3240 {
3241 FRESULT res;
3242 DWORD n, clst, sect, stat;
3243 UINT i;
3244 BYTE fat, *p;
3245
3246 /* Get drive number */
3247 res = chk_mounted( &path, fatfs, 0 );
3248 if( res != FR_OK )
3249 {
3250 LEAVE_FF( *fatfs, res );
3251 }
3252
3253 /* If number of free cluster is valid, return it without cluster scan. */
3254 if( (*fatfs)->free_clust <= (*fatfs)->max_clust - 2 )
3255 {
3256 *nclst = ( *fatfs )->free_clust;
3257 LEAVE_FF( *fatfs, FR_OK );
3258 }
3259
3260 /* Get number of free clusters */
3261 fat = ( *fatfs )->fs_type;
3262 n = 0;
3263 if( fat == FS_FAT12 )
3264 {
3265 clst = 2;
3266 do
3267 {
3268 stat = get_fat( *fatfs, clst );
3269 if( stat == 0xFFFFFFFF )
3270 {
3271 LEAVE_FF( *fatfs, FR_DISK_ERR );
3272 }
3273
3274 if( stat == 1 )
3275 {
3276 LEAVE_FF( *fatfs, FR_INT_ERR );
3277 }
3278
3279 if( stat == 0 )
3280 {
3281 n++;
3282 }
3283 } while( ++clst < (*fatfs)->max_clust );
3284 }
3285 else
3286 {
3287 clst = ( *fatfs )->max_clust;
3288 sect = ( *fatfs )->fatbase;
3289 i = 0;
3290 p = 0;
3291 do
3292 {
3293 if( !i )
3294 {
3295 res = move_window( *fatfs, sect++ );
3296 if( res != FR_OK )
3297 {
3298 LEAVE_FF( *fatfs, res );
3299 }
3300
3301 p = ( *fatfs )->win;
3302 i = SS( *fatfs );
3303 }
3304
3305 if( fat == FS_FAT16 )
3306 {
3307 if( LD_WORD(p) == 0 )
3308 {
3309 n++;
3310 }
3311
3312 p += 2;
3313 i -= 2;
3314 }
3315 else
3316 {
3317 if( (LD_DWORD(p) & 0x0FFFFFFF) == 0 )
3318 {
3319 n++;
3320 }
3321
3322 p += 4;
3323 i -= 4;
3324 }
3325 } while( --clst );
3326 }
3327
3328 ( *fatfs )->free_clust = n;
3329 if( fat == FS_FAT32 )
3330 {
3331 ( *fatfs )->fsi_flag = 1;
3332 }
3333
3334 *nclst = n;
3335
3336 LEAVE_FF( *fatfs, FR_OK );
3337 }
3338
3339 /*-----------------------------------------------------------------------*/
3340
3341 /* Truncate File */
3342
3343 /*-----------------------------------------------------------------------*/
3344 FRESULT f_truncate( FIL *fp /* Pointer to the file object */ )
3345 {
3346 FRESULT res;
3347 DWORD ncl;
3348
3349 res = validate( fp->fs, fp->id ); /* Check validity of the object */
3350 if( res != FR_OK )
3351 {
3352 LEAVE_FF( fp->fs, res );
3353 }
3354
3355 if( fp->flag & FA__ERROR )
3356 { /* Check abort flag */
3357 LEAVE_FF( fp->fs, FR_INT_ERR );
3358 }
3359
3360 if( !(fp->flag & FA_WRITE) )
3361 { /* Check access mode */
3362 LEAVE_FF( fp->fs, FR_DENIED );
3363 }
3364
3365 if( fp->fsize > fp->fptr )
3366 {
3367 fp->fsize = fp->fptr; /* Set file size to current R/W point */
3368 fp->flag |= FA__WRITTEN;
3369 if( fp->fptr == 0 )
3370 { /* When set file size to zero, remove entire cluster chain */
3371 res = remove_chain( fp->fs, fp->org_clust );
3372 fp->org_clust = 0;
3373 }
3374 else
3375 { /* When truncate a part of the file, remove remaining clusters */
3376 ncl = get_fat( fp->fs, fp->curr_clust );
3377 res = FR_OK;
3378 if( ncl == 0xFFFFFFFF )
3379 {
3380 res = FR_DISK_ERR;
3381 }
3382
3383 if( ncl == 1 )
3384 {
3385 res = FR_INT_ERR;
3386 }
3387
3388 if( res == FR_OK && ncl < fp->fs->max_clust )
3389 {
3390 res = put_fat( fp->fs, fp->curr_clust, 0x0FFFFFFF );
3391 if( res == FR_OK )
3392 {
3393 res = remove_chain( fp->fs, ncl );
3394 }
3395 }
3396 }
3397 }
3398
3399 if( res != FR_OK )
3400 {
3401 fp->flag |= FA__ERROR;
3402 }
3403
3404 LEAVE_FF( fp->fs, res );
3405 }
3406
3407 /*-----------------------------------------------------------------------*/
3408
3409 /* Delete a File or Directory */
3410
3411 /*-----------------------------------------------------------------------*/
3412 FRESULT f_unlink( const XCHAR *path /* Pointer to the file or directory path */ )
3413 {
3414 FRESULT res;
3415 DIR dj, sdj;
3416 NAMEBUF( sfn, lfn );
3417
3418 BYTE *dir;
3419 DWORD dclst;
3420
3421 res = chk_mounted( &path, &dj.fs, 1 );
3422 if( res != FR_OK )
3423 {
3424 LEAVE_FF( dj.fs, res );
3425 }
3426
3427 INITBUF( dj, sfn, lfn );
3428 res = follow_path( &dj, path ); /* Follow the file path */
3429 if( _FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT) )
3430 {
3431 res = FR_INVALID_NAME;
3432 }
3433
3434 if( res != FR_OK )
3435 {
3436 LEAVE_FF( dj.fs, res ); /* Follow failed */
3437 }
3438
3439 dir = dj.dir;
3440 if( !dir )
3441 { /* Is it the root directory? */
3442 LEAVE_FF( dj.fs, FR_INVALID_NAME );
3443 }
3444
3445 if( dir[DIR_Attr] & AM_RDO )
3446 { /* Is it a R/O object? */
3447 LEAVE_FF( dj.fs, FR_DENIED );
3448 }
3449
3450 dclst = ( (DWORD) LD_WORD(dir + DIR_FstClusHI) << 16 ) | LD_WORD( dir + DIR_FstClusLO );
3451
3452 if( dir[DIR_Attr] & AM_DIR )
3453 { /* It is a sub-directory */
3454 if( dclst < 2 )
3455 {
3456 LEAVE_FF( dj.fs, FR_INT_ERR );
3457 }
3458
3459 mem_cpy( &sdj, &dj, sizeof(DIR) ); /* Check if the sub-dir is empty or not */
3460 sdj.sclust = dclst;
3461 res = dir_seek( &sdj, 2 );
3462 if( res != FR_OK )
3463 {
3464 LEAVE_FF( dj.fs, res );
3465 }
3466
3467 res = dir_read( &sdj );
3468 if( res == FR_OK )
3469 {
3470 res = FR_DENIED; /* Not empty sub-dir */
3471 }
3472
3473 if( res != FR_NO_FILE )
3474 {
3475 LEAVE_FF( dj.fs, res );
3476 }
3477 }
3478
3479 res = dir_remove( &dj ); /* Remove directory entry */
3480 if( res == FR_OK )
3481 {
3482 if( dclst )
3483 {
3484 res = remove_chain( dj.fs, dclst ); /* Remove the cluster chain */
3485 }
3486
3487 if( res == FR_OK )
3488 {
3489 res = sync( dj.fs );
3490 }
3491 }
3492
3493 LEAVE_FF( dj.fs, res );
3494 }
3495
3496 /*-----------------------------------------------------------------------*/
3497
3498 /* Create a Directory */
3499
3500 /*-----------------------------------------------------------------------*/
3501 FRESULT f_mkdir( const XCHAR *path /* Pointer to the directory path */ )
3502 {
3503 FRESULT res;
3504 DIR dj;
3505 NAMEBUF( sfn, lfn );
3506
3507 BYTE *dir, n;
3508 DWORD dsect, dclst, pclst, tim;
3509
3510 res = chk_mounted( &path, &dj.fs, 1 );
3511 if( res != FR_OK )
3512 {
3513 LEAVE_FF( dj.fs, res );
3514 }
3515
3516 INITBUF( dj, sfn, lfn );
3517 res = follow_path( &dj, path ); /* Follow the file path */
3518 if( res == FR_OK )
3519 {
3520 res = FR_EXIST; /* Any file or directory is already existing */
3521 }
3522
3523 if( _FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT) )
3524 {
3525 res = FR_INVALID_NAME;
3526 }
3527
3528 if( res != FR_NO_FILE )
3529 { /* Any error occured */
3530 LEAVE_FF( dj.fs, res );
3531 }
3532
3533 dclst = create_chain( dj.fs, 0 ); /* Allocate a new cluster for new directory table */
3534 res = FR_OK;
3535 if( dclst == 0 )
3536 {
3537 res = FR_DENIED;
3538 }
3539
3540 if( dclst == 1 )
3541 {
3542 res = FR_INT_ERR;
3543 }
3544
3545 if( dclst == 0xFFFFFFFF )
3546 {
3547 res = FR_DISK_ERR;
3548 }
3549
3550 if( res == FR_OK )
3551 {
3552 res = move_window( dj.fs, 0 );
3553 }
3554
3555 if( res != FR_OK )
3556 {
3557 LEAVE_FF( dj.fs, res );
3558 }
3559
3560 dsect = clust2sect( dj.fs, dclst );
3561
3562 dir = dj.fs->win; /* Initialize the new directory table */
3563 mem_set( dir, 0, SS(dj.fs) );
3564 mem_set( dir + DIR_Name, ' ', 8 + 3 ); /* Create "." entry */
3565 dir[DIR_Name] = '.';
3566 dir[DIR_Attr] = AM_DIR;
3567 tim = get_fattime();
3568 ST_DWORD( dir + DIR_WrtTime, tim );
3569 ST_WORD( dir + DIR_FstClusLO, dclst );
3570 ST_WORD( dir + DIR_FstClusHI, dclst >> 16 );
3571 mem_cpy( dir + 32, dir, 32 ); /* Create ".." entry */
3572 dir[33] = '.';
3573 pclst = dj.sclust;
3574 if( dj.fs->fs_type == FS_FAT32 && pclst == dj.fs->dirbase )
3575 {
3576 pclst = 0;
3577 }
3578
3579 ST_WORD( dir + 32 + DIR_FstClusLO, pclst );
3580 ST_WORD( dir + 32 + DIR_FstClusHI, pclst >> 16 );
3581 for( n = 0; n < dj.fs->csize; n++ )
3582 { /* Write dot entries and clear left sectors */
3583 dj.fs->winsect = dsect++;
3584 dj.fs->wflag = 1;
3585 res = move_window( dj.fs, 0 );
3586 if( res )
3587 {
3588 LEAVE_FF( dj.fs, res );
3589 }
3590
3591 mem_set( dir, 0, SS(dj.fs) );
3592 }
3593
3594 res = dir_register( &dj );
3595 if( res != FR_OK )
3596 {
3597 remove_chain( dj.fs, dclst );
3598 }
3599 else
3600 {
3601 dir = dj.dir;
3602 dir[DIR_Attr] = AM_DIR; /* Attribute */
3603 ST_DWORD( dir + DIR_WrtTime, tim ); /* Crated time */
3604 ST_WORD( dir + DIR_FstClusLO, dclst ); /* Table start cluster */
3605 ST_WORD( dir + DIR_FstClusHI, dclst >> 16 );
3606 dj.fs->wflag = 1;
3607 res = sync( dj.fs );
3608 }
3609
3610 LEAVE_FF( dj.fs, res );
3611 }
3612
3613 /*-----------------------------------------------------------------------*/
3614
3615 /* Change File Attribute */
3616
3617 /*-----------------------------------------------------------------------*/
3618 FRESULT f_chmod( const XCHAR *path, /* Pointer to the file path */ BYTE value, /* Attribute bits */ BYTE mask /* Attribute mask to change */ )
3619 {
3620 FRESULT res;
3621 DIR dj;
3622 NAMEBUF( sfn, lfn );
3623
3624 BYTE *dir;
3625
3626 res = chk_mounted( &path, &dj.fs, 1 );
3627 if( res == FR_OK )
3628 {
3629 INITBUF( dj, sfn, lfn );
3630 res = follow_path( &dj, path ); /* Follow the file path */
3631 if( _FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT) )
3632 {
3633 res = FR_INVALID_NAME;
3634 }
3635
3636 if( res == FR_OK )
3637 {
3638 dir = dj.dir;
3639 if( !dir )
3640 { /* Is it a root directory? */
3641 res = FR_INVALID_NAME;
3642 }
3643 else
3644 { /* File or sub directory */
3645 mask &= AM_RDO | AM_HID | AM_SYS | AM_ARC; /* Valid attribute mask */
3646 dir[DIR_Attr] = ( value & mask ) | ( dir[DIR_Attr] & (BYTE)~mask ); /* Apply attribute change */
3647 dj.fs->wflag = 1;
3648 res = sync( dj.fs );
3649 }
3650 }
3651 }
3652
3653 LEAVE_FF( dj.fs, res );
3654 }
3655
3656 /*-----------------------------------------------------------------------*/
3657
3658 /* Change Timestamp */
3659
3660 /*-----------------------------------------------------------------------*/
3661 FRESULT f_utime( const XCHAR *path, /* Pointer to the file/directory name */ const FILINFO *fno /* Pointer to the timestamp to be set */ )
3662 {
3663 FRESULT res;
3664 DIR dj;
3665 NAMEBUF( sfn, lfn );
3666
3667 BYTE *dir;
3668
3669 res = chk_mounted( &path, &dj.fs, 1 );
3670 if( res == FR_OK )
3671 {
3672 INITBUF( dj, sfn, lfn );
3673 res = follow_path( &dj, path ); /* Follow the file path */
3674 if( _FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT) )
3675 {
3676 res = FR_INVALID_NAME;
3677 }
3678
3679 if( res == FR_OK )
3680 {
3681 dir = dj.dir;
3682 if( !dir )
3683 { /* Root directory */
3684 res = FR_INVALID_NAME;
3685 }
3686 else
3687 { /* File or sub-directory */
3688 ST_WORD( dir + DIR_WrtTime, fno->ftime );
3689 ST_WORD( dir + DIR_WrtDate, fno->fdate );
3690 dj.fs->wflag = 1;
3691 res = sync( dj.fs );
3692 }
3693 }
3694 }
3695
3696 LEAVE_FF( dj.fs, res );
3697 }
3698
3699 /*-----------------------------------------------------------------------*/
3700
3701 /* Rename File/Directory */
3702
3703 /*-----------------------------------------------------------------------*/
3704 FRESULT f_rename( const XCHAR *path_old, /* Pointer to the old name */ const XCHAR *path_new /* Pointer to the new name */ )
3705 {
3706 FRESULT res;
3707 DIR dj_old, dj_new;
3708 NAMEBUF( sfn, lfn );
3709
3710 BYTE buf[21], *dir;
3711 DWORD dw;
3712
3713 INITBUF( dj_old, sfn, lfn );
3714 res = chk_mounted( &path_old, &dj_old.fs, 1 );
3715 if( res == FR_OK )
3716 {
3717 dj_new.fs = dj_old.fs;
3718 res = follow_path( &dj_old, path_old ); /* Check old object */
3719 if( _FS_RPATH && res == FR_OK && (dj_old.fn[NS] & NS_DOT) )
3720 {
3721 res = FR_INVALID_NAME;
3722 }
3723 }
3724
3725 if( res != FR_OK )
3726 {
3727 LEAVE_FF( dj_old.fs, res ); /* The old object is not found */
3728 }
3729
3730 if( !dj_old.dir )
3731 {
3732 LEAVE_FF( dj_old.fs, FR_NO_FILE ); /* Is root dir? */
3733 }
3734
3735 mem_cpy( buf, dj_old.dir + DIR_Attr, 21 ); /* Save the object information */
3736
3737 mem_cpy( &dj_new, &dj_old, sizeof(DIR) );
3738 res = follow_path( &dj_new, path_new ); /* Check new object */
3739 if( res == FR_OK )
3740 {
3741 res = FR_EXIST; /* The new object name is already existing */
3742 }
3743
3744 if( res == FR_NO_FILE )
3745 { /* Is it a valid path and no name collision? */
3746 res = dir_register( &dj_new ); /* Register the new object */
3747 if( res == FR_OK )
3748 {
3749 dir = dj_new.dir; /* Copy object information into new entry */
3750 mem_cpy( dir + 13, buf + 2, 19 );
3751 dir[DIR_Attr] = buf[0] | AM_ARC;
3752 dj_old.fs->wflag = 1;
3753 if( dir[DIR_Attr] & AM_DIR )
3754 { /* Update .. entry in the directory if needed */
3755 dw = clust2sect( dj_new.fs, (DWORD) LD_WORD(dir + DIR_FstClusHI) | LD_WORD(dir + DIR_FstClusLO) );
3756 if( !dw )
3757 {
3758 res = FR_INT_ERR;
3759 }
3760 else
3761 {
3762 res = move_window( dj_new.fs, dw );
3763 dir = dj_new.fs->win + 32;
3764 if( res == FR_OK && dir[1] == '.' )
3765 {
3766 dw = ( dj_new.fs->fs_type == FS_FAT32 && dj_new.sclust == dj_new.fs->dirbase ) ? 0 : dj_new.sclust;
3767 ST_WORD( dir + DIR_FstClusLO, dw );
3768 ST_WORD( dir + DIR_FstClusHI, dw >> 16 );
3769 dj_new.fs->wflag = 1;
3770 }
3771 }
3772 }
3773
3774 if( res == FR_OK )
3775 {
3776 res = dir_remove( &dj_old ); /* Remove old entry */
3777 if( res == FR_OK )
3778 {
3779 res = sync( dj_old.fs );
3780 }
3781 }
3782 }
3783 }
3784
3785 LEAVE_FF( dj_old.fs, res );
3786 }
3787
3788 #endif /* !_FS_READONLY */
3789 #endif /* _FS_MINIMIZE == 0 */
3790 #endif /* _FS_MINIMIZE <= 1 */
3791 #endif /* _FS_MINIMIZE <= 2 */
3792
3793 /*-----------------------------------------------------------------------*/
3794
3795 /* Forward data to the stream directly (Available on only _FS_TINY cfg) */
3796
3797 /*-----------------------------------------------------------------------*/
3798 #if _USE_FORWARD && _FS_TINY
3799 FRESULT f_forward
3800 (
3801 FIL *fp, /* Pointer to the file object */
3802 UINT (*func) ( const BYTE *, UINT ), /* Pointer to the streaming function */
3803 UINT btr, /* Number of bytes to forward */
3804 UINT *bf /* Pointer to number of bytes forwarded */
3805 )
3806 {
3807 FRESULT res;
3808 DWORD remain, clst, sect;
3809 UINT rcnt;
3810
3811 *bf = 0;
3812
3813 res = validate( fp->fs, fp->id ); /* Check validity of the object */
3814 if( res != FR_OK )
3815 {
3816 LEAVE_FF( fp->fs, res );
3817 }
3818
3819 if( fp->flag & FA__ERROR )
3820 { /* Check error flag */
3821 LEAVE_FF( fp->fs, FR_INT_ERR );
3822 }
3823
3824 if( !(fp->flag & FA_READ) )
3825 { /* Check access mode */
3826 LEAVE_FF( fp->fs, FR_DENIED );
3827 }
3828
3829 remain = fp->fsize - fp->fptr;
3830 if( btr > remain )
3831 {
3832 btr = ( UINT ) remain; /* Truncate btr by remaining bytes */
3833 }
3834
3835 for
3836 (
3837 ;
3838 btr && (*func) (NULL, 0); /* Repeat until all data transferred or stream becomes busy */
3839 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt
3840 )
3841 {
3842 if( (fp->fptr % SS(fp->fs)) == 0 )
3843 { /* On the sector boundary? */
3844 if( fp->csect >= fp->fs->csize )
3845 { /* On the cluster boundary? */
3846 clst = ( fp->fptr == 0 ) ? /* On the top of the file? */
3847 fp->org_clust : get_fat( fp->fs, fp->curr_clust );
3848 if( clst <= 1 )
3849 {
3850 ABORT( fp->fs, FR_INT_ERR );
3851 }
3852
3853 if( clst == 0xFFFFFFFF )
3854 {
3855 ABORT( fp->fs, FR_DISK_ERR );
3856 }
3857
3858 fp->curr_clust = clst; /* Update current cluster */
3859 fp->csect = 0; /* Reset sector address in the cluster */
3860 }
3861
3862 fp->csect++; /* Next sector address in the cluster */
3863 }
3864
3865 sect = clust2sect( fp->fs, fp->curr_clust ); /* Get current data sector */
3866 if( !sect )
3867 {
3868 ABORT( fp->fs, FR_INT_ERR );
3869 }
3870
3871 sect += fp->csect - 1;
3872 if( move_window(fp->fs, sect) )
3873 { /* Move sector window */
3874 ABORT( fp->fs, FR_DISK_ERR );
3875 }
3876
3877 fp->dsect = sect;
3878 rcnt = SS( fp->fs ) - ( WORD ) ( fp->fptr % SS(fp->fs) ); /* Forward data from sector window */
3879 if( rcnt > btr )
3880 {
3881 rcnt = btr;
3882 }
3883
3884 rcnt = ( *func ) ( &fp->fs->win[(WORD) fp->fptr % SS(fp->fs)], rcnt );
3885 if( !rcnt )
3886 {
3887 ABORT( fp->fs, FR_INT_ERR );
3888 }
3889 }
3890
3891 LEAVE_FF( fp->fs, FR_OK );
3892 }
3893
3894 #endif /* _USE_FORWARD */
3895
3896 #if _USE_MKFS && !_FS_READONLY
3897
3898 /*-----------------------------------------------------------------------*/
3899
3900 /* Create File System on the Drive */
3901
3902 /*-----------------------------------------------------------------------*/
3903 #define N_ROOTDIR 512 /* Multiple of 32 and <= 2048 */
3904 #define N_FATS 1 /* 1 or 2 */
3905 #define MAX_SECTOR 131072000UL /* Maximum partition size */
3906 #define MIN_SECTOR 2000UL /* Minimum partition size */
3907
3908 FRESULT f_mkfs
3909 (
3910 BYTE drv, /* Logical drive number */
3911 BYTE partition, /* Partitioning rule 0:FDISK, 1:SFD */
3912 WORD allocsize /* Allocation unit size [bytes] */
3913 )
3914 {
3915 static const DWORD sstbl[] = { 2048000, 1024000, 512000, 256000, 128000, 64000, 32000, 16000, 8000, 4000, 0 };
3916 static const WORD cstbl[] = { 32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512 };
3917 BYTE fmt, m, *tbl;
3918 DWORD b_part, b_fat, b_dir, b_data; /* Area offset (LBA) */
3919 DWORD n_part, n_rsv, n_fat, n_dir; /* Area size */
3920 DWORD n_clst, d, n;
3921 WORD as;
3922 FATFS *fs;
3923 DSTATUS stat;
3924
3925 /* Check validity of the parameters */
3926 if( drv >= _DRIVES )
3927 {
3928 return FR_INVALID_DRIVE;
3929 }
3930
3931 if( partition >= 2 )
3932 {
3933 return FR_MKFS_ABORTED;
3934 }
3935
3936 /* Check mounted drive and clear work area */
3937 fs = FatFs[drv];
3938 if( !fs )
3939 {
3940 return FR_NOT_ENABLED;
3941 }
3942
3943 fs->fs_type = 0;
3944 drv = LD2PD( drv );
3945
3946 /* Get disk statics */
3947 stat = disk_initialize( drv );
3948 if( stat & STA_NOINIT )
3949 {
3950 return FR_NOT_READY;
3951 }
3952
3953 if( stat & STA_PROTECT )
3954 {
3955 return FR_WRITE_PROTECTED;
3956 }
3957
3958 #if _MAX_SS != 512 /* Get disk sector size */
3959 if( disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS )
3960 {
3961 return FR_MKFS_ABORTED;
3962 }
3963
3964 #endif
3965 if( disk_ioctl(drv, GET_SECTOR_COUNT, &n_part) != RES_OK || n_part < MIN_SECTOR )
3966 {
3967 return FR_MKFS_ABORTED;
3968 }
3969
3970 if( n_part > MAX_SECTOR )
3971 {
3972 n_part = MAX_SECTOR;
3973 }
3974
3975 b_part = ( !partition ) ? 63 : 0; /* Boot sector */
3976 n_part -= b_part;
3977 for( d = 512; d <= 32768U && d != allocsize; d <<= 1 );
3978
3979 /* Check validity of the allocation unit size */
3980 if( d != allocsize )
3981 {
3982 allocsize = 0;
3983 }
3984
3985 if( !allocsize )
3986 { /* Auto selection of cluster size */
3987 d = n_part;
3988 for( as = SS(fs); as > 512U; as >>= 1 )
3989 {
3990 d >>= 1;
3991 }
3992
3993 for( n = 0; d < sstbl[n]; n++ );
3994 allocsize = cstbl[n];
3995 }
3996
3997 if( allocsize < SS(fs) )
3998 {
3999 allocsize = SS( fs );
4000 }
4001
4002 allocsize /= SS( fs ); /* Number of sectors per cluster */
4003
4004 /* Pre-compute number of clusters and FAT type */
4005 n_clst = n_part / allocsize;
4006 fmt = FS_FAT12;
4007 if( n_clst >= 0xFF5 )
4008 {
4009 fmt = FS_FAT16;
4010 }
4011
4012 if( n_clst >= 0xFFF5 )
4013 {
4014 fmt = FS_FAT32;
4015 }
4016
4017 /* Determine offset and size of FAT structure */
4018 switch( fmt )
4019 {
4020 case FS_FAT12:
4021 n_fat = ( (n_clst * 3 + 1) / 2 + 3 + SS(fs) - 1 ) / SS( fs );
4022 n_rsv = 1 + partition;
4023 n_dir = N_ROOTDIR * 32 / SS( fs );
4024 break;
4025
4026 case FS_FAT16:
4027 n_fat = ( (n_clst * 2) + 4 + SS(fs) - 1 ) / SS( fs );
4028 n_rsv = 1 + partition;
4029 n_dir = N_ROOTDIR * 32 / SS( fs );
4030 break;
4031
4032 default:
4033 n_fat = ( (n_clst * 4) + 8 + SS(fs) - 1 ) / SS( fs );
4034 n_rsv = 33 - partition;
4035 n_dir = 0;
4036 }
4037
4038 b_fat = b_part + n_rsv; /* FATs start sector */
4039 b_dir = b_fat + n_fat * N_FATS; /* Directory start sector */
4040 b_data = b_dir + n_dir; /* Data start sector */
4041
4042 /* Align data start sector to erase block boundary (for flash memory media) */
4043 if( disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK )
4044 {
4045 return FR_MKFS_ABORTED;
4046 }
4047
4048 n = ( b_data + n - 1 ) &~( n - 1 );
4049 n_fat += ( n - b_data ) / N_FATS;
4050
4051 /* b_dir and b_data are no longer used below */
4052
4053 /* Determine number of cluster and final check of validity of the FAT type */
4054 n_clst = ( n_part - n_rsv - n_fat * N_FATS - n_dir ) / allocsize;
4055 if( (fmt == FS_FAT16 && n_clst < 0xFF5) || (fmt == FS_FAT32 && n_clst < 0xFFF5) )
4056 {
4057 return FR_MKFS_ABORTED;
4058 }
4059
4060 /* Create partition table if needed */
4061 if( !partition )
4062 {
4063 DWORD n_disk = b_part + n_part;
4064
4065 mem_set( fs->win, 0, SS(fs) );
4066 tbl = fs->win + MBR_Table;
4067 ST_DWORD( tbl, 0x00010180 ); /* Partition start in CHS */
4068 if( n_disk < 63UL * 255 * 1024 )
4069 { /* Partition end in CHS */
4070 n_disk = n_disk / 63 / 255;
4071 tbl[7] = ( BYTE ) n_disk;
4072 tbl[6] = ( BYTE ) ( (n_disk >> 2) | 63 );
4073 }
4074 else
4075 {
4076 ST_WORD( &tbl[6], 0xFFFF );
4077 }
4078
4079 tbl[5] = 254;
4080 if( fmt != FS_FAT32 )
4081 { /* System ID */
4082 tbl[4] = ( n_part < 0x10000 ) ? 0x04 : 0x06;
4083 }
4084 else
4085 {
4086 tbl[4] = 0x0c;
4087 }
4088
4089 ST_DWORD( tbl + 8, 63 ); /* Partition start in LBA */
4090 ST_DWORD( tbl + 12, n_part ); /* Partition size in LBA */
4091 ST_WORD( tbl + 64, 0xAA55 ); /* Signature */
4092 if( disk_write(drv, fs->win, 0, 1) != RES_OK )
4093 {
4094 return FR_DISK_ERR;
4095 }
4096
4097 partition = 0xF8;
4098 }
4099 else
4100 {
4101 partition = 0xF0;
4102 }
4103
4104 /* Create boot record */
4105 tbl = fs->win; /* Clear buffer */
4106 mem_set( tbl, 0, SS(fs) );
4107 ST_DWORD( tbl + BS_jmpBoot, 0x90FEEB ); /* Boot code (jmp $, nop) */
4108 ST_WORD( tbl + BPB_BytsPerSec, SS(fs) ); /* Sector size */
4109 tbl[BPB_SecPerClus] = ( BYTE ) allocsize; /* Sectors per cluster */
4110 ST_WORD( tbl + BPB_RsvdSecCnt, n_rsv ); /* Reserved sectors */
4111 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
4112 ST_WORD( tbl + BPB_RootEntCnt, SS(fs) / 32 * n_dir ); /* Number of rootdir entries */
4113 if( n_part < 0x10000 )
4114 { /* Number of total sectors */
4115 ST_WORD( tbl + BPB_TotSec16, n_part );
4116 }
4117 else
4118 {
4119 ST_DWORD( tbl + BPB_TotSec32, n_part );
4120 }
4121
4122 tbl[BPB_Media] = partition; /* Media descripter */
4123 ST_WORD( tbl + BPB_SecPerTrk, 63 ); /* Number of sectors per track */
4124 ST_WORD( tbl + BPB_NumHeads, 255 ); /* Number of heads */
4125 ST_DWORD( tbl + BPB_HiddSec, b_part ); /* Hidden sectors */
4126 n = get_fattime(); /* Use current time as a VSN */
4127 if( fmt != FS_FAT32 )
4128 {
4129 ST_DWORD( tbl + BS_VolID, n ); /* Volume serial number */
4130 ST_WORD( tbl + BPB_FATSz16, n_fat ); /* Number of secters per FAT */
4131 tbl[BS_DrvNum] = 0x80; /* Drive number */
4132 tbl[BS_BootSig] = 0x29; /* Extended boot signature */
4133 mem_cpy( tbl + BS_VolLab, "NO NAME FAT ", 19 ); /* Volume lavel, FAT signature */
4134 }
4135 else
4136 {
4137 ST_DWORD( tbl + BS_VolID32, n ); /* Volume serial number */
4138 ST_DWORD( tbl + BPB_FATSz32, n_fat ); /* Number of secters per FAT */
4139 ST_DWORD( tbl + BPB_RootClus, 2 ); /* Root directory cluster (2) */
4140 ST_WORD( tbl + BPB_FSInfo, 1 ); /* FSInfo record offset (bs+1) */
4141 ST_WORD( tbl + BPB_BkBootSec, 6 ); /* Backup boot record offset (bs+6) */
4142 tbl[BS_DrvNum32] = 0x80; /* Drive number */
4143 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
4144 mem_cpy( tbl + BS_VolLab32, "NO NAME FAT32 ", 19 ); /* Volume lavel, FAT signature */
4145 }
4146
4147 ST_WORD( tbl + BS_55AA, 0xAA55 ); /* Signature */
4148 if( SS(fs) > 512U )
4149 {
4150 ST_WORD( tbl + SS(fs) - 2, 0xAA55 );
4151 }
4152
4153 if( disk_write(drv, tbl, b_part + 0, 1) != RES_OK )
4154 {
4155 return FR_DISK_ERR;
4156 }
4157
4158 if( fmt == FS_FAT32 )
4159 {
4160 disk_write( drv, tbl, b_part + 6, 1 );
4161 }
4162
4163 /* Initialize FAT area */
4164 for( m = 0; m < N_FATS; m++ )
4165 {
4166 mem_set( tbl, 0, SS(fs) ); /* 1st sector of the FAT */
4167 if( fmt != FS_FAT32 )
4168 {
4169 n = ( fmt == FS_FAT12 ) ? 0x00FFFF00 : 0xFFFFFF00;
4170 n |= partition;
4171 ST_DWORD( tbl, n ); /* Reserve cluster #0-1 (FAT12/16) */
4172 }
4173 else
4174 {
4175 ST_DWORD( tbl + 0, 0xFFFFFFF8 ); /* Reserve cluster #0-1 (FAT32) */
4176 ST_DWORD( tbl + 4, 0xFFFFFFFF );
4177 ST_DWORD( tbl + 8, 0x0FFFFFFF ); /* Reserve cluster #2 for root dir */
4178 }
4179
4180 if( disk_write(drv, tbl, b_fat++, 1) != RES_OK )
4181 {
4182 return FR_DISK_ERR;
4183 }
4184
4185 mem_set( tbl, 0, SS(fs) ); /* Following FAT entries are filled by zero */
4186 for( n = 1; n < n_fat; n++ )
4187 {
4188 if( disk_write(drv, tbl, b_fat++, 1) != RES_OK )
4189 {
4190 return FR_DISK_ERR;
4191 }
4192 }
4193 }
4194
4195 /* Initialize Root directory */
4196 m = ( BYTE ) ( (fmt == FS_FAT32) ? allocsize : n_dir );
4197 do
4198 {
4199 if( disk_write(drv, tbl, b_fat++, 1) != RES_OK )
4200 {
4201 return FR_DISK_ERR;
4202 }
4203 } while( --m );
4204
4205 /* Create FSInfo record if needed */
4206 if( fmt == FS_FAT32 )
4207 {
4208 ST_WORD( tbl + BS_55AA, 0xAA55 );
4209 ST_DWORD( tbl + FSI_LeadSig, 0x41615252 );
4210 ST_DWORD( tbl + FSI_StrucSig, 0x61417272 );
4211 ST_DWORD( tbl + FSI_Free_Count, n_clst - 1 );
4212 ST_DWORD( tbl + FSI_Nxt_Free, 0xFFFFFFFF );
4213 disk_write( drv, tbl, b_part + 1, 1 );
4214 disk_write( drv, tbl, b_part + 7, 1 );
4215 }
4216
4217 return( disk_ioctl(drv, CTRL_SYNC, ( void * ) NULL) == RES_OK ) ? FR_OK : FR_DISK_ERR;
4218 }
4219
4220 #endif /* _USE_MKFS && !_FS_READONLY */
4221
4222 #if _USE_STRFUNC
4223
4224 /*-----------------------------------------------------------------------*/
4225
4226 /* Get a string from the file */
4227
4228 /*-----------------------------------------------------------------------*/
4229 char *f_gets
4230 (
4231 char *buff, /* Pointer to the string buffer to read */
4232 int len, /* Size of string buffer */
4233 FIL *fil /* Pointer to the file object */
4234 )
4235 {
4236 int i = 0;
4237 char *p = buff;
4238 UINT rc;
4239
4240 while( i < len - 1 )
4241 { /* Read bytes until buffer gets filled */
4242 f_read( fil, p, 1, &rc );
4243 if( rc != 1 )
4244 {
4245 break; /* Break when no data to read */
4246 }
4247
4248 #if _USE_STRFUNC >= 2
4249 if( *p == '\r' )
4250 {
4251 continue; /* Strip '\r' */
4252 }
4253
4254 #endif
4255 i++;
4256 if( *p++ == '\n' )
4257 {
4258 break; /* Break when reached end of line */
4259 }
4260 }
4261
4262 *p = 0;
4263 return i ? buff : NULL; /* When no data read (eof or error), return with error. */
4264 }
4265
4266 #if !_FS_READONLY
4267 #include <stdarg.h>
4268
4269 /*-----------------------------------------------------------------------*/
4270
4271 /* Put a character to the file */
4272
4273 /*-----------------------------------------------------------------------*/
4274 int f_putc( int chr, /* A character to be output */ FIL *fil /* Ponter to the file object */ )
4275 {
4276 UINT bw;
4277 char c;
4278
4279 #if _USE_STRFUNC >= 2
4280 if( chr == '\n' )
4281 {
4282 f_putc( '\r', fil ); /* LF -> CRLF conversion */
4283 }
4284
4285 #endif
4286 if( !fil )
4287 { /* Special value may be used to switch the destination to any other device */
4288 /* put_console(chr); */
4289 return chr;
4290 }
4291
4292 c = ( char ) chr;
4293 f_write( fil, &c, 1, &bw ); /* Write a byte to the file */
4294 return bw ? chr : EOF; /* Return the result */
4295 }
4296
4297 /*-----------------------------------------------------------------------*/
4298
4299 /* Put a string to the file */
4300
4301 /*-----------------------------------------------------------------------*/
4302 int f_puts( const char *str, /* Pointer to the string to be output */ FIL *fil /* Pointer to the file object */ )
4303 {
4304 int n;
4305
4306 for( n = 0; *str; str++, n++ )
4307 {
4308 if( f_putc(*str, fil) == EOF )
4309 {
4310 return EOF;
4311 }
4312 }
4313
4314 return n;
4315 }
4316
4317 /*-----------------------------------------------------------------------*/
4318
4319 /* Put a formatted string to the file */
4320
4321 /*-----------------------------------------------------------------------*/
4322 int f_printf( FIL *fil, /* Pointer to the file object */ const char *str, /* Pointer to the format string */ ... /* Optional arguments... */ )
4323 {
4324 va_list arp;
4325 UCHAR c, f, r;
4326 ULONG val;
4327 char s[16];
4328 int i, w, res, cc;
4329
4330 va_start( arp, str );
4331
4332 for( cc = res = 0; cc != EOF; res += cc )
4333 {
4334 c = *str++;
4335 if( c == 0 )
4336 {
4337 break; /* End of string */
4338 }
4339
4340 if( c != '%' )
4341 { /* Non escape cahracter */
4342 cc = f_putc( c, fil );
4343 if( cc != EOF )
4344 {
4345 cc = 1;
4346 }
4347
4348 continue;
4349 }
4350
4351 w = f = 0;
4352 c = *str++;
4353 if( c == '0' )
4354 { /* Flag: '0' padding */
4355 f = 1;
4356 c = *str++;
4357 }
4358
4359 while( c >= '0' && c <= '9' )
4360 { /* Precision */
4361 w = w * 10 + ( c - '0' );
4362 c = *str++;
4363 }
4364
4365 if( c == 'l' )
4366 { /* Prefix: Size is long int */
4367 f |= 2;
4368 c = *str++;
4369 }
4370
4371 if( c == 's' )
4372 { /* Type is string */
4373 cc = f_puts( va_arg(arp, char *), fil );
4374 continue;
4375 }
4376
4377 if( c == 'c' )
4378 { /* Type is character */
4379 cc = f_putc( va_arg(arp, int), fil );
4380 if( cc != EOF )
4381 {
4382 cc = 1;
4383 }
4384
4385 continue;
4386 }
4387
4388 r = 0;
4389 if( c == 'd' )
4390 {
4391 r = 10; /* Type is signed decimal */
4392 }
4393
4394 if( c == 'u' )
4395 {
4396 r = 10; /* Type is unsigned decimal */
4397 }
4398
4399 if( c == 'X' )
4400 {
4401 r = 16; /* Type is unsigned hexdecimal */
4402 }
4403
4404 if( r == 0 )
4405 {
4406 break; /* Unknown type */
4407 }
4408
4409 if( f & 2 )
4410 { /* Get the value */
4411 val = ( ULONG ) va_arg( arp, long );
4412 }
4413 else
4414 {
4415 val = ( c == 'd' ) ? ( ULONG ) ( long ) va_arg( arp, int ) : ( ULONG ) va_arg( arp, unsigned int );
4416 }
4417
4418 /* Put numeral string */
4419 if( c == 'd' )
4420 {
4421 if( val & 0x80000000 )
4422 {
4423 val = 0 - val;
4424 f |= 4;
4425 }
4426 }
4427
4428 i = sizeof( s ) - 1;
4429 s[i] = 0;
4430 do
4431 {
4432 c = ( UCHAR ) ( val % r + '0' );
4433 if( c > '9' )
4434 {
4435 c += 7;
4436 }
4437
4438 s[--i] = c;
4439 val /= r;
4440 } while( i && val );
4441 if( i && (f & 4) )
4442 {
4443 s[--i] = '-';
4444 }
4445
4446 w = sizeof( s ) - 1 - w;
4447 while( i && i > w )
4448 {
4449 s[--i] = ( f & 1 ) ? '0' : ' ';
4450 }
4451
4452 cc = f_puts( &s[i], fil );
4453 }
4454
4455 va_end( arp );
4456 return( cc == EOF ) ? cc : res;
4457 }
4458
4459 #endif /* !_FS_READONLY */
4460 #endif /* _USE_STRFUNC */
Embedded systems development suit