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00001 /*----------------------------------------------------------------------------/ 00002 / FatFs - FAT file system module R0.07e (C)ChaN, 2009 00003 /-----------------------------------------------------------------------------/ 00004 / FatFs module is a generic FAT file system module for small embedded systems. 00005 / This is a free software that opened for education, research and commercial 00006 / developments under license policy of following trems. 00007 / 00008 / Copyright (C) 2009, ChaN, all right reserved. 00009 / 00010 / * The FatFs module is a free software and there is NO WARRANTY. 00011 / * No restriction on use. You can use, modify and redistribute it for 00012 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. 00013 / * Redistributions of source code must retain the above copyright notice. 00014 / 00015 /-----------------------------------------------------------------------------/ 00016 / Feb 26,'06 R0.00 Prototype. 00017 / 00018 / Apr 29,'06 R0.01 First stable version. 00019 / 00020 / Jun 01,'06 R0.02 Added FAT12 support. 00021 / Removed unbuffered mode. 00022 / Fixed a problem on small (<32M) patition. 00023 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM). 00024 / 00025 / Sep 22,'06 R0.03 Added f_rename(). 00026 / Changed option _FS_MINIMUM to _FS_MINIMIZE. 00027 / Dec 11,'06 R0.03a Improved cluster scan algolithm to write files fast. 00028 / Fixed f_mkdir() creates incorrect directory on FAT32. 00029 / 00030 / Feb 04,'07 R0.04 Supported multiple drive system. 00031 / Changed some interfaces for multiple drive system. 00032 / Changed f_mountdrv() to f_mount(). 00033 / Added f_mkfs(). 00034 / Apr 01,'07 R0.04a Supported multiple partitions on a plysical drive. 00035 / Added a capability of extending file size to f_lseek(). 00036 / Added minimization level 3. 00037 / Fixed an endian sensitive code in f_mkfs(). 00038 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG. 00039 / Added FSInfo support. 00040 / Fixed DBCS name can result FR_INVALID_NAME. 00041 / Fixed short seek (<= csize) collapses the file object. 00042 / 00043 / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs(). 00044 / Fixed f_mkfs() on FAT32 creates incorrect FSInfo. 00045 / Fixed f_mkdir() on FAT32 creates incorrect directory. 00046 / Feb 03,'08 R0.05a Added f_truncate() and f_utime(). 00047 / Fixed off by one error at FAT sub-type determination. 00048 / Fixed btr in f_read() can be mistruncated. 00049 / Fixed cached sector is not flushed when create and close 00050 / without write. 00051 / 00052 / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets(). 00053 / Improved performance of f_lseek() on moving to the same 00054 / or following cluster. 00055 / 00056 / Apr 01,'09 R0.07 Merged Tiny-FatFs as a buffer configuration option. 00057 / Added long file name support. 00058 / Added multiple code page support. 00059 / Added re-entrancy for multitask operation. 00060 / Added auto cluster size selection to f_mkfs(). 00061 / Added rewind option to f_readdir(). 00062 / Changed result code of critical errors. 00063 / Renamed string functions to avoid name collision. 00064 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg. 00065 / Added multiple sector size support. 00066 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error. 00067 / Fixed wrong cache control in f_lseek(). 00068 / Added relative path feature. 00069 / Added f_chdir() and f_chdrive(). 00070 / Added proper case conversion to extended char. 00071 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h. 00072 / Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH. 00073 / Fixed name matching error on the 13 char boundary. 00074 / Added a configuration option, _LFN_UNICODE. 00075 / Changed f_readdir() to return the SFN with always upper 00076 / case on non-LFN cfg. 00077 /---------------------------------------------------------------------------*/ 00078 00079 #include "ff.h" /* FatFs configurations and declarations */ 00080 #include "diskio.h" /* Declarations of low level disk I/O functions */ 00081 00082 /*-------------------------------------------------------------------------- 00083 00084 Module Private Definitions 00085 00086 ---------------------------------------------------------------------------*/ 00087 00088 #if _FATFS != 0x007E 00089 #error Wrong include file (ff.h). 00090 #endif 00091 00092 #if _FS_REENTRANT 00093 #if _USE_LFN == 1 00094 #error Static LFN work area must not be used in re-entrant configuration. 00095 #endif 00096 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } 00097 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 00098 00099 #else 00100 #define ENTER_FF(fs) 00101 #define LEAVE_FF(fs, res) return res 00102 00103 #endif 00104 00105 #define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); } 00106 00107 #ifndef NULL 00108 #define NULL 0 00109 #endif 00110 00111 /* Name status flags */ 00112 #define NS 11 /* Offset of name status byte */ 00113 #define NS_LOSS 0x01 /* Out of 8.3 format */ 00114 #define NS_LFN 0x02 /* Force to create LFN entry */ 00115 #define NS_LAST 0x04 /* Last segment */ 00116 #define NS_BODY 0x08 /* Lower case flag (body) */ 00117 #define NS_EXT 0x10 /* Lower case flag (ext) */ 00118 #define NS_DOT 0x20 /* Dot entry */ 00119 00120 00121 00122 00123 /*-------------------------------------------------------------------------- 00124 00125 Private Work Area 00126 00127 ---------------------------------------------------------------------------*/ 00128 00129 #if _DRIVES < 1 || _DRIVES > 9 00130 #error Number of drives must be 1-9. 00131 #endif 00132 static 00133 FATFS *FatFs[_DRIVES]; /* Pointer to the file system objects (logical drives) */ 00134 00135 static 00136 WORD Fsid; /* File system mount ID */ 00137 00138 #if _FS_RPATH 00139 static 00140 BYTE Drive; /* Current drive */ 00141 #endif 00142 00143 00144 #if _USE_LFN == 1 /* LFN with static LFN working buffer */ 00145 static 00146 WCHAR LfnBuf[_MAX_LFN + 1]; 00147 #define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR *lp = LfnBuf 00148 #define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp 00149 00150 #elif _USE_LFN > 1 /* LFN with dynamic LFN working buffer */ 00151 #define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR lbuf[_MAX_LFN + 1], *lp = lbuf 00152 #define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp 00153 00154 #else /* No LFN */ 00155 #define NAMEBUF(sp,lp) BYTE sp[12] 00156 #define INITBUF(dj,sp,lp) dj.fn = sp 00157 00158 #endif 00159 00160 00161 00162 00163 /*-------------------------------------------------------------------------- 00164 00165 Module Private Functions 00166 00167 ---------------------------------------------------------------------------*/ 00168 00169 00170 /*-----------------------------------------------------------------------*/ 00171 /* String functions */ 00172 /*-----------------------------------------------------------------------*/ 00173 00174 /* Copy memory to memory */ 00175 static 00176 void mem_cpy (void* dst, const void* src, int cnt) { 00177 char *d = (char*)dst; 00178 const char *s = (const char *)src; 00179 while (cnt--) *d++ = *s++; 00180 } 00181 00182 /* Fill memory */ 00183 static 00184 void mem_set (void* dst, int val, int cnt) { 00185 char *d = (char*)dst; 00186 while (cnt--) *d++ = (char)val; 00187 } 00188 00189 /* Compare memory to memory */ 00190 static 00191 int mem_cmp (const void* dst, const void* src, int cnt) { 00192 const char *d = (const char *)dst, *s = (const char *)src; 00193 int r = 0; 00194 while (cnt-- && (r = *d++ - *s++) == 0) ; 00195 return r; 00196 } 00197 00198 /* Check if chr is contained in the string */ 00199 static 00200 int chk_chr (const char* str, int chr) { 00201 while (*str && *str != chr) str++; 00202 return *str; 00203 } 00204 00205 00206 00207 /*-----------------------------------------------------------------------*/ 00208 /* Request/Release grant to access the volume */ 00209 /*-----------------------------------------------------------------------*/ 00210 #if _FS_REENTRANT 00211 00212 static 00213 BOOL lock_fs ( 00214 FATFS *fs /* File system object */ 00215 ) 00216 { 00217 return ff_req_grant(fs->sobj); 00218 } 00219 00220 00221 static 00222 void unlock_fs ( 00223 FATFS *fs, /* File system object */ 00224 FRESULT res /* Result code to be returned */ 00225 ) 00226 { 00227 if (res != FR_NOT_ENABLED && 00228 res != FR_INVALID_DRIVE && 00229 res != FR_INVALID_OBJECT && 00230 res != FR_TIMEOUT) { 00231 ff_rel_grant(fs->sobj); 00232 } 00233 } 00234 #endif 00235 00236 00237 00238 /*-----------------------------------------------------------------------*/ 00239 /* Change window offset */ 00240 /*-----------------------------------------------------------------------*/ 00241 00242 static 00243 FRESULT move_window ( 00244 FATFS *fs, /* File system object */ 00245 DWORD sector /* Sector number to make apperance in the fs->win[] */ 00246 ) /* Move to zero only writes back dirty window */ 00247 { 00248 DWORD wsect; 00249 00250 00251 wsect = fs->winsect; 00252 if (wsect != sector) { /* Changed current window */ 00253 #if !_FS_READONLY 00254 if (fs->wflag) { /* Write back dirty window if needed */ 00255 if (disk_write(fs->drive, fs->win, wsect, 1) != RES_OK) 00256 return FR_DISK_ERR; 00257 fs->wflag = 0; 00258 if (wsect < (fs->fatbase + fs->sects_fat)) { /* In FAT area */ 00259 BYTE nf; 00260 for (nf = fs->n_fats; nf > 1; nf--) { /* Refrect the change to all FAT copies */ 00261 wsect += fs->sects_fat; 00262 disk_write(fs->drive, fs->win, wsect, 1); 00263 } 00264 } 00265 } 00266 #endif 00267 if (sector) { 00268 if (disk_read(fs->drive, fs->win, sector, 1) != RES_OK) 00269 return FR_DISK_ERR; 00270 fs->winsect = sector; 00271 } 00272 } 00273 00274 return FR_OK; 00275 } 00276 00277 00278 00279 00280 /*-----------------------------------------------------------------------*/ 00281 /* Clean-up cached data */ 00282 /*-----------------------------------------------------------------------*/ 00283 #if !_FS_READONLY 00284 static 00285 FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */ 00286 FATFS *fs /* File system object */ 00287 ) 00288 { 00289 FRESULT res; 00290 00291 00292 res = move_window(fs, 0); 00293 if (res == FR_OK) { 00294 /* Update FSInfo sector if needed */ 00295 if (fs->fs_type == FS_FAT32 && fs->fsi_flag) { 00296 fs->winsect = 0; 00297 mem_set(fs->win, 0, 512); 00298 ST_WORD(fs->win+BS_55AA, 0xAA55); 00299 ST_DWORD(fs->win+FSI_LeadSig, 0x41615252); 00300 ST_DWORD(fs->win+FSI_StrucSig, 0x61417272); 00301 ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust); 00302 ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust); 00303 disk_write(fs->drive, fs->win, fs->fsi_sector, 1); 00304 fs->fsi_flag = 0; 00305 } 00306 /* Make sure that no pending write process in the physical drive */ 00307 if (disk_ioctl(fs->drive, CTRL_SYNC, (void*)NULL) != RES_OK) 00308 res = FR_DISK_ERR; 00309 } 00310 00311 return res; 00312 } 00313 #endif 00314 00315 00316 00317 00318 /*-----------------------------------------------------------------------*/ 00319 /* FAT access - Read value of a FAT entry */ 00320 /*-----------------------------------------------------------------------*/ 00321 00322 00323 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Interal error, Else:Cluster status */ 00324 FATFS *fs, /* File system object */ 00325 DWORD clst /* Cluster# to get the link information */ 00326 ) 00327 { 00328 UINT wc, bc; 00329 DWORD fsect; 00330 00331 00332 if (clst < 2 || clst >= fs->max_clust) /* Range check */ 00333 return 1; 00334 00335 fsect = fs->fatbase; 00336 switch (fs->fs_type) { 00337 case FS_FAT12 : 00338 bc = clst; bc += bc / 2; 00339 if (move_window(fs, fsect + (bc / SS(fs)))) break; 00340 wc = fs->win[bc & (SS(fs) - 1)]; bc++; 00341 if (move_window(fs, fsect + (bc / SS(fs)))) break; 00342 wc |= (WORD)fs->win[bc & (SS(fs) - 1)] << 8; 00343 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); 00344 00345 case FS_FAT16 : 00346 if (move_window(fs, fsect + (clst / (SS(fs) / 2)))) break; 00347 return LD_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)]); 00348 00349 case FS_FAT32 : 00350 if (move_window(fs, fsect + (clst / (SS(fs) / 4)))) break; 00351 return LD_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)]) & 0x0FFFFFFF; 00352 } 00353 00354 return 0xFFFFFFFF; /* An error occured at the disk I/O layer */ 00355 } 00356 00357 00358 00359 00360 /*-----------------------------------------------------------------------*/ 00361 /* FAT access - Change value of a FAT entry */ 00362 /*-----------------------------------------------------------------------*/ 00363 #if !_FS_READONLY 00364 00365 FRESULT put_fat ( 00366 FATFS *fs, /* File system object */ 00367 DWORD clst, /* Cluster# to be changed in range of 2 to fs->max_clust - 1 */ 00368 DWORD val /* New value to mark the cluster */ 00369 ) 00370 { 00371 UINT bc; 00372 BYTE *p; 00373 DWORD fsect; 00374 FRESULT res; 00375 00376 00377 if (clst < 2 || clst >= fs->max_clust) { /* Range check */ 00378 res = FR_INT_ERR; 00379 00380 } else { 00381 fsect = fs->fatbase; 00382 switch (fs->fs_type) { 00383 case FS_FAT12 : 00384 bc = clst; bc += bc / 2; 00385 res = move_window(fs, fsect + (bc / SS(fs))); 00386 if (res != FR_OK) break; 00387 p = &fs->win[bc & (SS(fs) - 1)]; 00388 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; 00389 bc++; 00390 fs->wflag = 1; 00391 res = move_window(fs, fsect + (bc / SS(fs))); 00392 if (res != FR_OK) break; 00393 p = &fs->win[bc & (SS(fs) - 1)]; 00394 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); 00395 break; 00396 00397 case FS_FAT16 : 00398 res = move_window(fs, fsect + (clst / (SS(fs) / 2))); 00399 if (res != FR_OK) break; 00400 ST_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)], (WORD)val); 00401 break; 00402 00403 case FS_FAT32 : 00404 res = move_window(fs, fsect + (clst / (SS(fs) / 4))); 00405 if (res != FR_OK) break; 00406 ST_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)], val); 00407 break; 00408 00409 default : 00410 res = FR_INT_ERR; 00411 } 00412 fs->wflag = 1; 00413 } 00414 00415 return res; 00416 } 00417 #endif /* !_FS_READONLY */ 00418 00419 00420 00421 00422 /*-----------------------------------------------------------------------*/ 00423 /* FAT handling - Remove a cluster chain */ 00424 /*-----------------------------------------------------------------------*/ 00425 #if !_FS_READONLY 00426 static 00427 FRESULT remove_chain ( 00428 FATFS *fs, /* File system object */ 00429 DWORD clst /* Cluster# to remove a chain from */ 00430 ) 00431 { 00432 FRESULT res; 00433 DWORD nxt; 00434 00435 00436 if (clst < 2 || clst >= fs->max_clust) { /* Check the range of cluster# */ 00437 res = FR_INT_ERR; 00438 00439 } else { 00440 res = FR_OK; 00441 while (clst < fs->max_clust) { /* Not a last link? */ 00442 nxt = get_fat(fs, clst); /* Get cluster status */ 00443 if (nxt == 0) break; /* Empty cluster? */ 00444 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ 00445 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ 00446 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ 00447 if (res != FR_OK) break; 00448 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */ 00449 fs->free_clust++; 00450 fs->fsi_flag = 1; 00451 } 00452 clst = nxt; /* Next cluster */ 00453 } 00454 } 00455 00456 return res; 00457 } 00458 #endif 00459 00460 00461 00462 00463 /*-----------------------------------------------------------------------*/ 00464 /* FAT handling - Stretch or Create a cluster chain */ 00465 /*-----------------------------------------------------------------------*/ 00466 #if !_FS_READONLY 00467 static 00468 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 00469 FATFS *fs, /* File system object */ 00470 DWORD clst /* Cluster# to stretch. 0 means create a new chain. */ 00471 ) 00472 { 00473 DWORD cs, ncl, scl, mcl; 00474 00475 00476 mcl = fs->max_clust; 00477 if (clst == 0) { /* Create new chain */ 00478 scl = fs->last_clust; /* Get suggested start point */ 00479 if (scl == 0 || scl >= mcl) scl = 1; 00480 } 00481 else { /* Stretch existing chain */ 00482 cs = get_fat(fs, clst); /* Check the cluster status */ 00483 if (cs < 2) return 1; /* It is an invalid cluster */ 00484 if (cs < mcl) return cs; /* It is already followed by next cluster */ 00485 scl = clst; 00486 } 00487 00488 ncl = scl; /* Start cluster */ 00489 for (;;) { 00490 ncl++; /* Next cluster */ 00491 if (ncl >= mcl) { /* Wrap around */ 00492 ncl = 2; 00493 if (ncl > scl) return 0; /* No free custer */ 00494 } 00495 cs = get_fat(fs, ncl); /* Get the cluster status */ 00496 if (cs == 0) break; /* Found a free cluster */ 00497 if (cs == 0xFFFFFFFF || cs == 1)/* An error occured */ 00498 return cs; 00499 if (ncl == scl) return 0; /* No free custer */ 00500 } 00501 00502 if (put_fat(fs, ncl, 0x0FFFFFFF)) /* Mark the new cluster "in use" */ 00503 return 0xFFFFFFFF; 00504 if (clst != 0) { /* Link it to the previous one if needed */ 00505 if (put_fat(fs, clst, ncl)) 00506 return 0xFFFFFFFF; 00507 } 00508 00509 fs->last_clust = ncl; /* Update FSINFO */ 00510 if (fs->free_clust != 0xFFFFFFFF) { 00511 fs->free_clust--; 00512 fs->fsi_flag = 1; 00513 } 00514 00515 return ncl; /* Return new cluster number */ 00516 } 00517 #endif /* !_FS_READONLY */ 00518 00519 00520 00521 00522 /*-----------------------------------------------------------------------*/ 00523 /* Get sector# from cluster# */ 00524 /*-----------------------------------------------------------------------*/ 00525 00526 00527 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ 00528 FATFS *fs, /* File system object */ 00529 DWORD clst /* Cluster# to be converted */ 00530 ) 00531 { 00532 clst -= 2; 00533 if (clst >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */ 00534 return clst * fs->csize + fs->database; 00535 } 00536 00537 00538 00539 00540 /*-----------------------------------------------------------------------*/ 00541 /* Directory handling - Seek directory index */ 00542 /*-----------------------------------------------------------------------*/ 00543 00544 static 00545 FRESULT dir_seek ( 00546 eDIR *dj, /* Pointer to directory object */ 00547 WORD idx /* Directory index number */ 00548 ) 00549 { 00550 DWORD clst; 00551 WORD ic; 00552 00553 00554 dj->index = idx; 00555 clst = dj->sclust; 00556 if (clst == 1 || clst >= dj->fs->max_clust) /* Check start cluster range */ 00557 return FR_INT_ERR; 00558 if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ 00559 clst = dj->fs->dirbase; 00560 00561 if (clst == 0) { /* Static table */ 00562 dj->clust = clst; 00563 if (idx >= dj->fs->n_rootdir) /* Index is out of range */ 00564 return FR_INT_ERR; 00565 dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / 32); /* Sector# */ 00566 } 00567 else { /* Dynamic table */ 00568 ic = SS(dj->fs) / 32 * dj->fs->csize; /* Entries per cluster */ 00569 while (idx >= ic) { /* Follow cluster chain */ 00570 clst = get_fat(dj->fs, clst); /* Get next cluster */ 00571 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 00572 if (clst < 2 || clst >= dj->fs->max_clust) /* Reached to end of table or int error */ 00573 return FR_INT_ERR; 00574 idx -= ic; 00575 } 00576 dj->clust = clst; 00577 dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / 32); /* Sector# */ 00578 } 00579 00580 dj->dir = dj->fs->win + (idx % (SS(dj->fs) / 32)) * 32; /* Ptr to the entry in the sector */ 00581 00582 return FR_OK; /* Seek succeeded */ 00583 } 00584 00585 00586 00587 00588 /*-----------------------------------------------------------------------*/ 00589 /* Directory handling - Move directory index next */ 00590 /*-----------------------------------------------------------------------*/ 00591 00592 static 00593 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not streach */ 00594 eDIR *dj, /* Pointer to directory object */ 00595 BOOL streach /* FALSE: Do not streach table, TRUE: Streach table if needed */ 00596 ) 00597 { 00598 DWORD clst; 00599 WORD i; 00600 00601 00602 i = dj->index + 1; 00603 if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ 00604 return FR_NO_FILE; 00605 00606 if (!(i % (SS(dj->fs) / 32))) { /* Sector changed? */ 00607 dj->sect++; /* Next sector */ 00608 00609 if (dj->clust == 0) { /* Static table */ 00610 if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */ 00611 return FR_NO_FILE; 00612 } 00613 else { /* Dynamic table */ 00614 if (((i / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */ 00615 clst = get_fat(dj->fs, dj->clust); /* Get next cluster */ 00616 if (clst <= 1) return FR_INT_ERR; 00617 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 00618 if (clst >= dj->fs->max_clust) { /* When it reached end of dynamic table */ 00619 #if !_FS_READONLY 00620 BYTE c; 00621 if (!streach) return FR_NO_FILE; /* When do not streach, report EOT */ 00622 clst = create_chain(dj->fs, dj->clust); /* Streach cluster chain */ 00623 if (clst == 0) return FR_DENIED; /* No free cluster */ 00624 if (clst == 1) return FR_INT_ERR; 00625 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 00626 /* Clean-up streached table */ 00627 if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */ 00628 mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */ 00629 dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */ 00630 for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */ 00631 dj->fs->wflag = 1; 00632 if (move_window(dj->fs, 0)) return FR_DISK_ERR; 00633 dj->fs->winsect++; 00634 } 00635 dj->fs->winsect -= c; /* Rewind window address */ 00636 #else 00637 return FR_NO_FILE; /* Report EOT */ 00638 #endif 00639 } 00640 dj->clust = clst; /* Initialize data for new cluster */ 00641 dj->sect = clust2sect(dj->fs, clst); 00642 } 00643 } 00644 } 00645 00646 dj->index = i; 00647 dj->dir = dj->fs->win + (i % (SS(dj->fs) / 32)) * 32; 00648 00649 return FR_OK; 00650 } 00651 00652 00653 00654 00655 /*-----------------------------------------------------------------------*/ 00656 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ 00657 /*-----------------------------------------------------------------------*/ 00658 #if _USE_LFN 00659 static 00660 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */ 00661 00662 00663 static 00664 BOOL cmp_lfn ( /* TRUE:Matched, FALSE:Not matched */ 00665 WCHAR *lfnbuf, /* Pointer to the LFN to be compared */ 00666 BYTE *dir /* Pointer to the directory entry containing a part of LFN */ 00667 ) 00668 { 00669 int i, s; 00670 WCHAR wc, uc; 00671 00672 00673 i = ((dir[LDIR_Ord] & 0xBF) - 1) * 13; /* Get offset in the LFN buffer */ 00674 s = 0; wc = 1; 00675 do { 00676 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 00677 if (wc) { /* Last char has not been processed */ 00678 wc = ff_wtoupper(uc); /* Convert it to upper case */ 00679 if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */ 00680 return FALSE; /* Not matched */ 00681 } else { 00682 if (uc != 0xFFFF) return FALSE; /* Check filler */ 00683 } 00684 } while (++s < 13); /* Repeat until all chars in the entry are checked */ 00685 00686 if ((dir[LDIR_Ord] & 0x40) && wc && lfnbuf[i]) /* Last segment matched but different length */ 00687 return FALSE; 00688 00689 return TRUE; /* The part of LFN matched */ 00690 } 00691 00692 00693 00694 static 00695 BOOL pick_lfn ( /* TRUE:Succeeded, FALSE:Buffer overflow */ 00696 WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */ 00697 BYTE *dir /* Pointer to the directory entry */ 00698 ) 00699 { 00700 int i, s; 00701 WCHAR wc, uc; 00702 00703 00704 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 00705 00706 s = 0; wc = 1; 00707 do { 00708 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 00709 if (wc) { /* Last char has not been processed */ 00710 if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */ 00711 lfnbuf[i++] = wc = uc; /* Store it */ 00712 } else { 00713 if (uc != 0xFFFF) return FALSE; /* Check filler */ 00714 } 00715 } while (++s < 13); /* Read all character in the entry */ 00716 00717 if (dir[LDIR_Ord] & 0x40) { /* Put terminator if it is the last LFN part */ 00718 if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */ 00719 lfnbuf[i] = 0; 00720 } 00721 00722 return TRUE; 00723 } 00724 00725 00726 #if !_FS_READONLY 00727 static 00728 void fit_lfn ( 00729 const WCHAR *lfnbuf, /* Pointer to the LFN buffer */ 00730 BYTE *dir, /* Pointer to the directory entry */ 00731 BYTE ord, /* LFN order (1-20) */ 00732 BYTE sum /* SFN sum */ 00733 ) 00734 { 00735 int i, s; 00736 WCHAR wc; 00737 00738 00739 dir[LDIR_Chksum] = sum; /* Set check sum */ 00740 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 00741 dir[LDIR_Type] = 0; 00742 ST_WORD(dir+LDIR_FstClusLO, 0); 00743 00744 i = (ord - 1) * 13; /* Get offset in the LFN buffer */ 00745 s = wc = 0; 00746 do { 00747 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */ 00748 ST_WORD(dir+LfnOfs[s], wc); /* Put it */ 00749 if (!wc) wc = 0xFFFF; /* Padding chars following last char */ 00750 } while (++s < 13); 00751 if (wc == 0xFFFF || !lfnbuf[i]) ord |= 0x40; /* Bottom LFN part is the start of LFN sequence */ 00752 dir[LDIR_Ord] = ord; /* Set the LFN order */ 00753 } 00754 00755 #endif 00756 #endif 00757 00758 00759 00760 /*-----------------------------------------------------------------------*/ 00761 /* Create numbered name */ 00762 /*-----------------------------------------------------------------------*/ 00763 #if _USE_LFN 00764 void gen_numname ( 00765 BYTE *dst, /* Pointer to genartated SFN */ 00766 const BYTE *src, /* Pointer to source SFN to be modified */ 00767 const WCHAR *lfn, /* Pointer to LFN */ 00768 WORD num /* Sequense number */ 00769 ) 00770 { 00771 char ns[8]; 00772 int i, j; 00773 00774 00775 mem_cpy(dst, src, 11); 00776 00777 if (num > 5) { /* On many collisions, generate a hash number instead of sequencial number */ 00778 do num = (num >> 1) + (num << 15) + (WORD)*lfn++; while (*lfn); 00779 } 00780 00781 /* itoa */ 00782 i = 7; 00783 do { 00784 ns[i--] = (num % 10) + '0'; 00785 num /= 10; 00786 } while (num); 00787 ns[i] = '~'; 00788 00789 /* Append the number */ 00790 for (j = 0; j < i && dst[j] != ' '; j++) { 00791 if (IsDBCS1(dst[j])) { 00792 if (j == i - 1) break; 00793 j++; 00794 } 00795 } 00796 do { 00797 dst[j++] = (i < 8) ? ns[i++] : ' '; 00798 } while (j < 8); 00799 } 00800 #endif 00801 00802 00803 00804 00805 /*-----------------------------------------------------------------------*/ 00806 /* Calculate sum of an SFN */ 00807 /*-----------------------------------------------------------------------*/ 00808 #if _USE_LFN 00809 static 00810 BYTE sum_sfn ( 00811 const BYTE *dir /* Ptr to directory entry */ 00812 ) 00813 { 00814 BYTE sum = 0; 00815 int n = 11; 00816 00817 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); 00818 return sum; 00819 } 00820 #endif 00821 00822 00823 00824 00825 /*-----------------------------------------------------------------------*/ 00826 /* Directory handling - Find an object in the directory */ 00827 /*-----------------------------------------------------------------------*/ 00828 00829 static 00830 FRESULT dir_find ( 00831 eDIR *dj /* Pointer to the directory object linked to the file name */ 00832 ) 00833 { 00834 FRESULT res; 00835 BYTE c, *dir; 00836 #if _USE_LFN 00837 BYTE a, ord, sum; 00838 #endif 00839 00840 res = dir_seek(dj, 0); /* Rewind directory object */ 00841 if (res != FR_OK) return res; 00842 00843 #if _USE_LFN 00844 ord = sum = 0xFF; 00845 #endif 00846 do { 00847 res = move_window(dj->fs, dj->sect); 00848 if (res != FR_OK) break; 00849 dir = dj->dir; /* Ptr to the directory entry of current index */ 00850 c = dir[DIR_Name]; 00851 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 00852 #if _USE_LFN /* LFN configuration */ 00853 a = dir[DIR_Attr] & AM_MASK; 00854 if (c == 0xE5 || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 00855 ord = 0xFF; 00856 } else { 00857 if (a == AM_LFN) { /* An LFN entry is found */ 00858 if (dj->lfn) { 00859 if (c & 0x40) { /* Is it start of LFN sequence? */ 00860 sum = dir[LDIR_Chksum]; 00861 c &= 0xBF; ord = c; /* LFN start order */ 00862 dj->lfn_idx = dj->index; 00863 } 00864 /* Check validity of the LFN entry and compare it with given name */ 00865 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; 00866 } 00867 } else { /* An SFN entry is found */ 00868 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ 00869 ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 00870 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */ 00871 } 00872 } 00873 #else /* Non LFN configuration */ 00874 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ 00875 break; 00876 #endif 00877 res = dir_next(dj, FALSE); /* Next entry */ 00878 } while (res == FR_OK); 00879 00880 return res; 00881 } 00882 00883 00884 00885 00886 /*-----------------------------------------------------------------------*/ 00887 /* Read an object from the directory */ 00888 /*-----------------------------------------------------------------------*/ 00889 #if _FS_MINIMIZE <= 1 00890 static 00891 FRESULT dir_read ( 00892 eDIR *dj /* Pointer to the directory object that pointing the entry to be read */ 00893 ) 00894 { 00895 FRESULT res; 00896 BYTE c, *dir; 00897 #if _USE_LFN 00898 BYTE a, ord = 0xFF, sum = 0xFF; 00899 #endif 00900 00901 res = FR_NO_FILE; 00902 while (dj->sect) { 00903 res = move_window(dj->fs, dj->sect); 00904 if (res != FR_OK) break; 00905 dir = dj->dir; /* Ptr to the directory entry of current index */ 00906 c = dir[DIR_Name]; 00907 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 00908 #if _USE_LFN /* LFN configuration */ 00909 a = dir[DIR_Attr] & AM_MASK; 00910 if (c == 0xE5 || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 00911 ord = 0xFF; 00912 } else { 00913 if (a == AM_LFN) { /* An LFN entry is found */ 00914 if (c & 0x40) { /* Is it start of LFN sequence? */ 00915 sum = dir[LDIR_Chksum]; 00916 c &= 0xBF; ord = c; 00917 dj->lfn_idx = dj->index; 00918 } 00919 /* Check LFN validity and capture it */ 00920 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; 00921 } else { /* An SFN entry is found */ 00922 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ 00923 dj->lfn_idx = 0xFFFF; /* It has no LFN. */ 00924 break; 00925 } 00926 } 00927 #else /* Non LFN configuration */ 00928 if (c != 0xE5 && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */ 00929 break; 00930 #endif 00931 res = dir_next(dj, FALSE); /* Next entry */ 00932 if (res != FR_OK) break; 00933 } 00934 00935 if (res != FR_OK) dj->sect = 0; 00936 00937 return res; 00938 } 00939 #endif 00940 00941 00942 00943 /*-----------------------------------------------------------------------*/ 00944 /* Register an object to the directory */ 00945 /*-----------------------------------------------------------------------*/ 00946 #if !_FS_READONLY 00947 static 00948 FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */ 00949 eDIR *dj /* Target directory with object name to be created */ 00950 ) 00951 { 00952 FRESULT res; 00953 BYTE c, *dir; 00954 #if _USE_LFN /* LFN configuration */ 00955 WORD n, ne, is; 00956 BYTE sn[12], *fn, sum; 00957 WCHAR *lfn; 00958 00959 00960 fn = dj->fn; lfn = dj->lfn; 00961 mem_cpy(sn, fn, 12); 00962 00963 if (_FS_RPATH && (sn[NS] & NS_DOT)) return FR_INVALID_NAME; /* Cannot create dot entry */ 00964 00965 if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 00966 fn[NS] = 0; dj->lfn = NULL; /* Find only SFN */ 00967 for (n = 1; n < 100; n++) { 00968 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ 00969 res = dir_find(dj); /* Check if the name collides with existing SFN */ 00970 if (res != FR_OK) break; 00971 } 00972 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 00973 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 00974 fn[NS] = sn[NS]; dj->lfn = lfn; 00975 } 00976 00977 if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve reserve an SFN + LFN entries. */ 00978 for (ne = 0; lfn[ne]; ne++) ; 00979 ne = (ne + 25) / 13; 00980 } else { /* Otherwise reserve only an SFN entry. */ 00981 ne = 1; 00982 } 00983 00984 /* Reserve contiguous entries */ 00985 res = dir_seek(dj, 0); 00986 if (res != FR_OK) return res; 00987 n = is = 0; 00988 do { 00989 res = move_window(dj->fs, dj->sect); 00990 if (res != FR_OK) break; 00991 c = *dj->dir; /* Check the entry status */ 00992 if (c == 0xE5 || c == 0) { /* Is it a blank entry? */ 00993 if (n == 0) is = dj->index; /* First index of the contigulus entry */ 00994 if (++n == ne) break; /* A contiguous entry that requiered count is found */ 00995 } else { 00996 n = 0; /* Not a blank entry. Restart to search */ 00997 } 00998 res = dir_next(dj, TRUE); /* Next entry with table streach */ 00999 } while (res == FR_OK); 01000 01001 if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */ 01002 res = dir_seek(dj, is); 01003 if (res == FR_OK) { 01004 sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */ 01005 ne--; 01006 do { /* Store LFN entries in bottom first */ 01007 res = move_window(dj->fs, dj->sect); 01008 if (res != FR_OK) break; 01009 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum); 01010 dj->fs->wflag = 1; 01011 res = dir_next(dj, FALSE); /* Next entry */ 01012 } while (res == FR_OK && --ne); 01013 } 01014 } 01015 01016 #else /* Non LFN configuration */ 01017 res = dir_seek(dj, 0); 01018 if (res == FR_OK) { 01019 do { /* Find a blank entry for the SFN */ 01020 res = move_window(dj->fs, dj->sect); 01021 if (res != FR_OK) break; 01022 c = *dj->dir; 01023 if (c == 0xE5 || c == 0) break; /* Is it a blank entry? */ 01024 res = dir_next(dj, TRUE); /* Next entry with table streach */ 01025 } while (res == FR_OK); 01026 } 01027 #endif 01028 01029 if (res == FR_OK) { /* Initialize the SFN entry */ 01030 res = move_window(dj->fs, dj->sect); 01031 if (res == FR_OK) { 01032 dir = dj->dir; 01033 mem_set(dir, 0, 32); /* Clean the entry */ 01034 mem_cpy(dir, dj->fn, 11); /* Put SFN */ 01035 dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */ 01036 dj->fs->wflag = 1; 01037 } 01038 } 01039 01040 return res; 01041 } 01042 #endif /* !_FS_READONLY */ 01043 01044 01045 01046 01047 /*-----------------------------------------------------------------------*/ 01048 /* Remove an object from the directory */ 01049 /*-----------------------------------------------------------------------*/ 01050 #if !_FS_READONLY && !_FS_MINIMIZE 01051 static 01052 FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */ 01053 eDIR *dj /* Directory object pointing the entry to be removed */ 01054 ) 01055 { 01056 FRESULT res; 01057 #if _USE_LFN /* LFN configuration */ 01058 WORD i; 01059 01060 i = dj->index; /* SFN index */ 01061 res = dir_seek(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */ 01062 if (res == FR_OK) { 01063 do { 01064 res = move_window(dj->fs, dj->sect); 01065 if (res != FR_OK) break; 01066 *dj->dir = 0xE5; /* Mark the entry "deleted" */ 01067 dj->fs->wflag = 1; 01068 if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ 01069 res = dir_next(dj, FALSE); /* Next entry */ 01070 } while (res == FR_OK); 01071 if (res == FR_NO_FILE) res = FR_INT_ERR; 01072 } 01073 01074 #else /* Non LFN configuration */ 01075 res = dir_seek(dj, dj->index); 01076 if (res == FR_OK) { 01077 res = move_window(dj->fs, dj->sect); 01078 if (res == FR_OK) { 01079 *dj->dir = 0xE5; /* Mark the entry "deleted" */ 01080 dj->fs->wflag = 1; 01081 } 01082 } 01083 #endif 01084 01085 return res; 01086 } 01087 #endif /* !_FS_READONLY */ 01088 01089 01090 01091 01092 /*-----------------------------------------------------------------------*/ 01093 /* Pick a segment and create the object name in directory form */ 01094 /*-----------------------------------------------------------------------*/ 01095 01096 static 01097 FRESULT create_name ( 01098 eDIR *dj, /* Pointer to the directory object */ 01099 const XCHAR **path /* Pointer to pointer to the segment in the path string */ 01100 ) 01101 { 01102 #ifdef _EXCVT 01103 static const BYTE cvt[] = _EXCVT; 01104 #endif 01105 01106 #if _USE_LFN /* LFN configuration */ 01107 BYTE b, cf; 01108 WCHAR w, *lfn; 01109 int i, ni, si, di; 01110 const XCHAR *p; 01111 01112 /* Create LFN in Unicode */ 01113 si = di = 0; 01114 p = *path; 01115 lfn = dj->lfn; 01116 for (;;) { 01117 w = p[si++]; /* Get a character */ 01118 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ 01119 if (di >= _MAX_LFN) /* Reject too long name */ 01120 return FR_INVALID_NAME; 01121 #if !_LFN_UNICODE 01122 w &= 0xFF; 01123 if (IsDBCS1(w)) { /* If it is a DBC 1st byte */ 01124 b = p[si++]; /* Get 2nd byte */ 01125 if (!IsDBCS2(b)) /* Reject invalid code for DBC */ 01126 return FR_INVALID_NAME; 01127 w = (w << 8) + b; 01128 } 01129 w = ff_convert(w, 1); /* Convert OEM to Unicode */ 01130 if (!w) return FR_INVALID_NAME; /* Reject invalid code */ 01131 #endif 01132 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */ 01133 return FR_INVALID_NAME; 01134 lfn[di++] = w; /* Store the Unicode char */ 01135 } 01136 *path = &p[si]; /* Rerurn pointer to the next segment */ 01137 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01138 #if _FS_RPATH 01139 if ((di == 1 && lfn[di - 1] == '.') || /* Is this a dot entry? */ 01140 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { 01141 lfn[di] = 0; 01142 for (i = 0; i < 11; i++) 01143 dj->fn[i] = (i < di) ? '.' : ' '; 01144 dj->fn[i] = cf | NS_DOT; /* This is a dot entry */ 01145 return FR_OK; 01146 } 01147 #endif 01148 while (di) { /* Strip trailing spaces and dots */ 01149 w = lfn[di - 1]; 01150 if (w != ' ' && w != '.') break; 01151 di--; 01152 } 01153 if (!di) return FR_INVALID_NAME; /* Reject null string */ 01154 01155 lfn[di] = 0; /* LFN is created */ 01156 01157 /* Create SFN in directory form */ 01158 mem_set(dj->fn, ' ', 11); 01159 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ 01160 if (si) cf |= NS_LOSS | NS_LFN; 01161 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ 01162 01163 b = i = 0; ni = 8; 01164 for (;;) { 01165 w = lfn[si++]; /* Get an LFN char */ 01166 if (!w) break; /* Break on enf of the LFN */ 01167 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ 01168 cf |= NS_LOSS | NS_LFN; continue; 01169 } 01170 01171 if (i >= ni || si == di) { /* Extension or end of SFN */ 01172 if (ni == 11) { /* Long extension */ 01173 cf |= NS_LOSS | NS_LFN; break; 01174 } 01175 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ 01176 if (si > di) break; /* No extension */ 01177 si = di; i = 8; ni = 11; /* Enter extension section */ 01178 b <<= 2; continue; 01179 } 01180 01181 if (w >= 0x80) { /* Non ASCII char */ 01182 #ifdef _EXCVT 01183 w = ff_convert(w, 0); /* Unicode -> OEM code */ 01184 if (w) w = cvt[w - 0x80]; /* Convert extended char to upper (SBCS) */ 01185 #else 01186 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ 01187 #endif 01188 cf |= NS_LFN; /* Force create LFN entry */ 01189 } 01190 01191 if (_DF1S && w >= 0x100) { /* Double byte char */ 01192 if (i >= ni - 1) { 01193 cf |= NS_LOSS | NS_LFN; i = ni; continue; 01194 } 01195 dj->fn[i++] = (BYTE)(w >> 8); 01196 } else { /* Single byte char */ 01197 if (!w || chk_chr("+,;[=]", w)) { /* Replace illegal chars for SFN */ 01198 w = '_'; cf |= NS_LOSS | NS_LFN; /* Lossy conversion */ 01199 } else { 01200 if (IsUpper(w)) { /* ASCII large capital */ 01201 b |= 2; 01202 } else { 01203 if (IsLower(w)) { /* ASCII small capital */ 01204 b |= 1; w -= 0x20; 01205 } 01206 } 01207 } 01208 } 01209 dj->fn[i++] = (BYTE)w; 01210 } 01211 01212 if (dj->fn[0] == 0xE5) dj->fn[0] = 0x05; /* If the first char collides with deleted mark, replace it with 0x05 */ 01213 01214 if (ni == 8) b <<= 2; 01215 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ 01216 cf |= NS_LFN; 01217 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */ 01218 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ 01219 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ 01220 } 01221 01222 dj->fn[NS] = cf; /* SFN is created */ 01223 01224 return FR_OK; 01225 01226 01227 #else /* Non-LFN configuration */ 01228 BYTE b, c, d, *sfn; 01229 int ni, si, i; 01230 const char *p; 01231 01232 /* Create file name in directory form */ 01233 sfn = dj->fn; 01234 mem_set(sfn, ' ', 11); 01235 si = i = b = 0; ni = 8; 01236 p = *path; 01237 #if _FS_RPATH 01238 if (p[si] == '.') { /* Is this a dot entry? */ 01239 for (;;) { 01240 c = p[si++]; 01241 if (c != '.' || si >= 3) break; 01242 sfn[i++] = c; 01243 } 01244 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 01245 *path = &p[si]; /* Rerurn pointer to the next segment */ 01246 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ 01247 return FR_OK; 01248 } 01249 #endif 01250 for (;;) { 01251 c = p[si++]; 01252 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ 01253 if (c == '.' || i >= ni) { 01254 if (ni != 8 || c != '.') return FR_INVALID_NAME; 01255 i = 8; ni = 11; 01256 b <<= 2; continue; 01257 } 01258 if (c >= 0x80) { /* Extended char */ 01259 #ifdef _EXCVT 01260 c = cvt[c - 0x80]; /* Convert extend char (SBCS) */ 01261 #else 01262 b |= 3; /* Eliminate NT flag if ext char is exist */ 01263 #if !_DF1S /* ASCII only cfg */ 01264 return FR_INVALID_NAME; 01265 #endif 01266 #endif 01267 } 01268 if (IsDBCS1(c)) { /* DBC 1st byte? */ 01269 d = p[si++]; /* Get 2nd byte */ 01270 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ 01271 return FR_INVALID_NAME; 01272 sfn[i++] = c; 01273 sfn[i++] = d; 01274 } else { /* Single byte code */ 01275 if (chk_chr(" \"*+,[=]|\x7F", c)) /* Reject illegal chrs for SFN */ 01276 return FR_INVALID_NAME; 01277 if (IsUpper(c)) { /* ASCII large capital? */ 01278 b |= 2; 01279 } else { 01280 if (IsLower(c)) { /* ASCII small capital? */ 01281 b |= 1; c -= 0x20; 01282 } 01283 } 01284 sfn[i++] = c; 01285 } 01286 } 01287 *path = &p[si]; /* Rerurn pointer to the next segment */ 01288 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01289 01290 if (!i) return FR_INVALID_NAME; /* Reject null string */ 01291 if (sfn[0] == 0xE5) sfn[0] = 0x05; /* When first char collides with 0xE5, replace it with 0x05 */ 01292 01293 if (ni == 8) b <<= 2; 01294 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Extension has only small capital) */ 01295 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Filename has only small capital) */ 01296 01297 sfn[NS] = c; /* Store NT flag, File name is created */ 01298 01299 return FR_OK; 01300 #endif 01301 } 01302 01303 01304 01305 01306 /*-----------------------------------------------------------------------*/ 01307 /* Get file information from directory entry */ 01308 /*-----------------------------------------------------------------------*/ 01309 #if _FS_MINIMIZE <= 1 01310 static 01311 void get_fileinfo ( /* No return code */ 01312 eDIR *dj, /* Pointer to the directory object */ 01313 FILINFO *fno /* Pointer to the file information to be filled */ 01314 ) 01315 { 01316 int i; 01317 BYTE c, nt, *dir; 01318 char *p; 01319 01320 01321 p = fno->fname; 01322 if (dj->sect) { 01323 dir = dj->dir; 01324 nt = dir[DIR_NTres]; /* NT flag */ 01325 for (i = 0; i < 8; i++) { /* Copy name body */ 01326 c = dir[i]; 01327 if (c == ' ') break; 01328 if (c == 0x05) c = 0xE5; 01329 if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20; 01330 *p++ = c; 01331 } 01332 if (dir[8] != ' ') { /* Copy name extension */ 01333 *p++ = '.'; 01334 for (i = 8; i < 11; i++) { 01335 c = dir[i]; 01336 if (c == ' ') break; 01337 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20; 01338 *p++ = c; 01339 } 01340 } 01341 fno->fattrib = dir[DIR_Attr]; /* Attribute */ 01342 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ 01343 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ 01344 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ 01345 } 01346 *p = 0; 01347 01348 #if _USE_LFN 01349 if (fno->lfname) { 01350 XCHAR *tp = fno->lfname; 01351 WCHAR w, *lfn; 01352 01353 i = 0; 01354 if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */ 01355 lfn = dj->lfn; 01356 while ((w = *lfn++) != 0) { /* Get an LFN char */ 01357 #if !_LFN_UNICODE 01358 w = ff_convert(w, 0); /* Unicode -> OEM conversion */ 01359 if (!w) { i = 0; break; } /* Could not convert, no LFN */ 01360 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC */ 01361 tp[i++] = (XCHAR)(w >> 8); 01362 #endif 01363 if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overrun, no LFN */ 01364 tp[i++] = (XCHAR)w; 01365 } 01366 } 01367 tp[i] = 0; /* Terminator */ 01368 } 01369 #endif 01370 } 01371 #endif /* _FS_MINIMIZE <= 1 */ 01372 01373 01374 01375 01376 /*-----------------------------------------------------------------------*/ 01377 /* Follow a file path */ 01378 /*-----------------------------------------------------------------------*/ 01379 01380 static 01381 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 01382 eDIR *dj, /* Directory object to return last directory and found object */ 01383 const XCHAR *path /* Full-path string to find a file or directory */ 01384 ) 01385 { 01386 FRESULT res; 01387 BYTE *dir, last; 01388 01389 01390 while (!_USE_LFN && *path == ' ') path++; /* Skip leading spaces */ 01391 #if _FS_RPATH 01392 if (*path == '/' || *path == '\\') { /* There is a heading separator */ 01393 path++; dj->sclust = 0; /* Strip it and start from the root dir */ 01394 } else { /* No heading saparator */ 01395 dj->sclust = dj->fs->cdir; /* Start from the current dir */ 01396 } 01397 #else 01398 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ 01399 path++; 01400 dj->sclust = 0; /* Start from the root dir */ 01401 #endif 01402 01403 if ((UINT)*path < ' ') { /* Null path means the start directory itself */ 01404 res = dir_seek(dj, 0); 01405 dj->dir = NULL; 01406 01407 } else { /* Follow path */ 01408 for (;;) { 01409 res = create_name(dj, &path); /* Get a segment */ 01410 if (res != FR_OK) break; 01411 res = dir_find(dj); /* Find it */ 01412 last = *(dj->fn+NS) & NS_LAST; 01413 if (res != FR_OK) { /* Could not find the object */ 01414 if (res == FR_NO_FILE && !last) 01415 res = FR_NO_PATH; 01416 break; 01417 } 01418 if (last) break; /* Last segment match. Function completed. */ 01419 dir = dj->dir; /* There is next segment. Follow the sub directory */ 01420 if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */ 01421 res = FR_NO_PATH; break; 01422 } 01423 dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO); 01424 } 01425 } 01426 01427 return res; 01428 } 01429 01430 01431 01432 01433 /*-----------------------------------------------------------------------*/ 01434 /* Load boot record and check if it is an FAT boot record */ 01435 /*-----------------------------------------------------------------------*/ 01436 01437 static 01438 BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */ 01439 FATFS *fs, /* File system object */ 01440 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ 01441 ) 01442 { 01443 if (disk_read(fs->drive, fs->win, sect, 1) != RES_OK) /* Load boot record */ 01444 return 3; 01445 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */ 01446 return 2; 01447 01448 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 01449 return 0; 01450 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) 01451 return 0; 01452 01453 return 1; 01454 } 01455 01456 01457 01458 01459 /*-----------------------------------------------------------------------*/ 01460 /* Make sure that the file system is valid */ 01461 /*-----------------------------------------------------------------------*/ 01462 01463 01464 FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occured */ 01465 const XCHAR **path, /* Pointer to pointer to the path name (drive number) */ 01466 FATFS **rfs, /* Pointer to pointer to the found file system object */ 01467 BYTE chk_wp /* !=0: Check media write protection for write access */ 01468 ) 01469 { 01470 BYTE fmt, *tbl; 01471 UINT vol; 01472 DSTATUS stat; 01473 DWORD bsect, fsize, tsect, mclst; 01474 const XCHAR *p = *path; 01475 FATFS *fs; 01476 01477 /* Get logical drive number from the path name */ 01478 vol = p[0] - '0'; /* Is there a drive number? */ 01479 if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */ 01480 p += 2; *path = p; /* Return pointer to the path name */ 01481 } else { /* No drive number is given */ 01482 #if _FS_RPATH 01483 vol = Drive; /* Use current drive */ 01484 #else 01485 vol = 0; /* Use drive 0 */ 01486 #endif 01487 } 01488 01489 /* Check if the logical drive is valid or not */ 01490 if (vol >= _DRIVES) /* Is the drive number valid? */ 01491 return FR_INVALID_DRIVE; 01492 *rfs = fs = FatFs[vol]; /* Returen pointer to the corresponding file system object */ 01493 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ 01494 01495 ENTER_FF(fs); /* Lock file system */ 01496 01497 if (fs->fs_type) { /* If the logical drive has been mounted */ 01498 stat = disk_status(fs->drive); 01499 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */ 01500 #if !_FS_READONLY 01501 if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */ 01502 return FR_WRITE_PROTECTED; 01503 #endif 01504 return FR_OK; /* The file system object is valid */ 01505 } 01506 } 01507 01508 /* The logical drive must be mounted. Following code attempts to mount the volume */ 01509 01510 fs->fs_type = 0; /* Clear the file system object */ 01511 fs->drive = (BYTE)LD2PD(vol); /* Bind the logical drive and a physical drive */ 01512 stat = disk_initialize(fs->drive); /* Initialize low level disk I/O layer */ 01513 if (stat & STA_NOINIT) /* Check if the drive is ready */ 01514 return FR_NOT_READY; 01515 #if _MAX_SS != 512 /* Get disk sector size if needed */ 01516 if (disk_ioctl(fs->drive, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS) 01517 return FR_NO_FILESYSTEM; 01518 #endif 01519 #if !_FS_READONLY 01520 if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */ 01521 return FR_WRITE_PROTECTED; 01522 #endif 01523 /* Search FAT partition on the drive */ 01524 fmt = check_fs(fs, bsect = 0); /* Check sector 0 as an SFD format */ 01525 if (fmt == 1) { /* Not an FAT boot record, it may be patitioned */ 01526 /* Check a partition listed in top of the partition table */ 01527 tbl = &fs->win[MBR_Table + LD2PT(vol) * 16]; /* Partition table */ 01528 if (tbl[4]) { /* Is the partition existing? */ 01529 bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */ 01530 fmt = check_fs(fs, bsect); /* Check the partition */ 01531 } 01532 } 01533 if (fmt == 3) return FR_DISK_ERR; 01534 if (fmt || LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* No valid FAT patition is found */ 01535 return FR_NO_FILESYSTEM; 01536 01537 /* Initialize the file system object */ 01538 fsize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */ 01539 if (!fsize) fsize = LD_DWORD(fs->win+BPB_FATSz32); 01540 fs->sects_fat = fsize; 01541 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */ 01542 fsize *= fs->n_fats; /* (Number of sectors in FAT area) */ 01543 fs->fatbase = bsect + LD_WORD(fs->win+BPB_RsvdSecCnt); /* FAT start sector (lba) */ 01544 fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ 01545 fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Nmuber of root directory entries */ 01546 tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */ 01547 if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32); 01548 fs->max_clust = mclst = (tsect /* Last cluster# + 1 (Number of clusters + 2) */ 01549 - LD_WORD(fs->win+BPB_RsvdSecCnt) - fsize - fs->n_rootdir / (SS(fs)/32) 01550 ) / fs->csize + 2; 01551 01552 fmt = FS_FAT12; /* Determine the FAT sub type */ 01553 if (mclst >= 0xFF7) fmt = FS_FAT16; /* Number of clusters >= 0xFF5 */ 01554 if (mclst >= 0xFFF7) fmt = FS_FAT32; /* Number of clusters >= 0xFFF5 */ 01555 01556 if (fmt == FS_FAT32) 01557 fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */ 01558 else 01559 fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */ 01560 fs->database = fs->fatbase + fsize + fs->n_rootdir / (SS(fs)/32); /* Data start sector (lba) */ 01561 01562 #if !_FS_READONLY 01563 /* Initialize allocation information */ 01564 fs->free_clust = 0xFFFFFFFF; 01565 fs->wflag = 0; 01566 /* Get fsinfo if needed */ 01567 if (fmt == FS_FAT32) { 01568 fs->fsi_flag = 0; 01569 fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo); 01570 if (disk_read(fs->drive, fs->win, fs->fsi_sector, 1) == RES_OK && 01571 LD_WORD(fs->win+BS_55AA) == 0xAA55 && 01572 LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 && 01573 LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) { 01574 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free); 01575 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count); 01576 } 01577 } 01578 #endif 01579 fs->fs_type = fmt; /* FAT sub-type */ 01580 fs->winsect = 0; /* Invalidate sector cache */ 01581 #if _FS_RPATH 01582 fs->cdir = 0; /* Current directory (root dir) */ 01583 #endif 01584 fs->id = ++Fsid; /* File system mount ID */ 01585 01586 return FR_OK; 01587 } 01588 01589 01590 01591 01592 /*-----------------------------------------------------------------------*/ 01593 /* Check if the file/dir object is valid or not */ 01594 /*-----------------------------------------------------------------------*/ 01595 01596 static 01597 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ 01598 FATFS *fs, /* Pointer to the file system object */ 01599 WORD id /* Member id of the target object to be checked */ 01600 ) 01601 { 01602 if (!fs || !fs->fs_type || fs->id != id) 01603 return FR_INVALID_OBJECT; 01604 01605 ENTER_FF(fs); /* Lock file system */ 01606 01607 if (disk_status(fs->drive) & STA_NOINIT) 01608 return FR_NOT_READY; 01609 01610 return FR_OK; 01611 } 01612 01613 01614 01615 01616 /*-------------------------------------------------------------------------- 01617 01618 Public Functions 01619 01620 --------------------------------------------------------------------------*/ 01621 01622 01623 01624 /*-----------------------------------------------------------------------*/ 01625 /* Mount/Unmount a Locical Drive */ 01626 /*-----------------------------------------------------------------------*/ 01627 01628 FRESULT f_mount ( 01629 BYTE vol, /* Logical drive number to be mounted/unmounted */ 01630 FATFS *fs /* Pointer to new file system object (NULL for unmount)*/ 01631 ) 01632 { 01633 FATFS *rfs; 01634 01635 01636 if (vol >= _DRIVES) /* Check if the drive number is valid */ 01637 return FR_INVALID_DRIVE; 01638 rfs = FatFs[vol]; /* Get current fs object */ 01639 01640 if (rfs) { 01641 #if _FS_REENTRANT /* Discard sync object of the current volume */ 01642 if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR; 01643 #endif 01644 rfs->fs_type = 0; /* Clear old fs object */ 01645 } 01646 01647 if (fs) { 01648 fs->fs_type = 0; /* Clear new fs object */ 01649 #if _FS_REENTRANT /* Create sync object for the new volume */ 01650 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR; 01651 #endif 01652 } 01653 FatFs[vol] = fs; /* Register new fs object */ 01654 01655 return FR_OK; 01656 } 01657 01658 01659 01660 01661 /*-----------------------------------------------------------------------*/ 01662 /* Open or Create a File */ 01663 /*-----------------------------------------------------------------------*/ 01664 01665 FRESULT f_open ( 01666 FIL *fp, /* Pointer to the blank file object */ 01667 const XCHAR *path, /* Pointer to the file name */ 01668 BYTE mode /* Access mode and file open mode flags */ 01669 ) 01670 { 01671 FRESULT res; 01672 eDIR dj; 01673 NAMEBUF(sfn, lfn); 01674 BYTE *dir; 01675 01676 01677 fp->fs = NULL; /* Clear file object */ 01678 #if !_FS_READONLY 01679 mode &= (FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW); 01680 res = chk_mounted(&path, &dj.fs, (BYTE)(mode & (FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW))); 01681 #else 01682 mode &= FA_READ; 01683 res = chk_mounted(&path, &dj.fs, 0); 01684 #endif 01685 if (res != FR_OK) LEAVE_FF(dj.fs, res); 01686 INITBUF(dj, sfn, lfn); 01687 res = follow_path(&dj, path); /* Follow the file path */ 01688 01689 #if !_FS_READONLY 01690 /* Create or Open a file */ 01691 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 01692 DWORD ps, cl; 01693 01694 if (res != FR_OK) { /* No file, create new */ 01695 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ 01696 res = dir_register(&dj); 01697 if (res != FR_OK) LEAVE_FF(dj.fs, res); 01698 mode |= FA_CREATE_ALWAYS; 01699 dir = dj.dir; /* Created entry (SFN entry) */ 01700 } 01701 else { /* Any object is already existing */ 01702 if (mode & FA_CREATE_NEW) /* Cannot create new */ 01703 LEAVE_FF(dj.fs, FR_EXIST); 01704 dir = dj.dir; 01705 if (!dir || (dir[DIR_Attr] & (AM_RDO | AM_DIR))) /* Cannot overwrite it (R/O or DIR) */ 01706 LEAVE_FF(dj.fs, FR_DENIED); 01707 if (mode & FA_CREATE_ALWAYS) { /* Resize it to zero on over write mode */ 01708 cl = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO); /* Get start cluster */ 01709 ST_WORD(dir+DIR_FstClusHI, 0); /* cluster = 0 */ 01710 ST_WORD(dir+DIR_FstClusLO, 0); 01711 ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */ 01712 dj.fs->wflag = 1; 01713 ps = dj.fs->winsect; /* Remove the cluster chain */ 01714 if (cl) { 01715 res = remove_chain(dj.fs, cl); 01716 if (res) LEAVE_FF(dj.fs, res); 01717 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ 01718 } 01719 res = move_window(dj.fs, ps); 01720 if (res != FR_OK) LEAVE_FF(dj.fs, res); 01721 } 01722 } 01723 if (mode & FA_CREATE_ALWAYS) { 01724 dir[DIR_Attr] = 0; /* Reset attribute */ 01725 ps = get_fattime(); 01726 ST_DWORD(dir+DIR_CrtTime, ps); /* Created time */ 01727 dj.fs->wflag = 1; 01728 mode |= FA__WRITTEN; /* Set file changed flag */ 01729 } 01730 } 01731 /* Open an existing file */ 01732 else { 01733 #endif /* !_FS_READONLY */ 01734 if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */ 01735 dir = dj.dir; 01736 if (!dir || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */ 01737 LEAVE_FF(dj.fs, FR_NO_FILE); 01738 #if !_FS_READONLY 01739 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ 01740 LEAVE_FF(dj.fs, FR_DENIED); 01741 } 01742 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ 01743 fp->dir_ptr = dj.dir; 01744 #endif 01745 fp->flag = mode; /* File access mode */ 01746 fp->org_clust = /* File start cluster */ 01747 ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO); 01748 fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ 01749 fp->fptr = 0; fp->csect = 255; /* File pointer */ 01750 fp->dsect = 0; 01751 fp->fs = dj.fs; fp->id = dj.fs->id; /* Owner file system object of the file */ 01752 01753 LEAVE_FF(dj.fs, FR_OK); 01754 } 01755 01756 01757 01758 01759 /*-----------------------------------------------------------------------*/ 01760 /* Read File */ 01761 /*-----------------------------------------------------------------------*/ 01762 01763 FRESULT f_read ( 01764 FIL *fp, /* Pointer to the file object */ 01765 void *buff, /* Pointer to data buffer */ 01766 UINT btr, /* Number of bytes to read */ 01767 UINT *br /* Pointer to number of bytes read */ 01768 ) 01769 { 01770 FRESULT res; 01771 DWORD clst, sect, remain; 01772 UINT rcnt, cc; 01773 BYTE *rbuff = (BYTE *)buff; 01774 01775 01776 *br = 0; /* Initialize bytes read */ 01777 01778 res = validate(fp->fs, fp->id); /* Check validity of the object */ 01779 if (res != FR_OK) LEAVE_FF(fp->fs, res); 01780 if (fp->flag & FA__ERROR) /* Check abort flag */ 01781 LEAVE_FF(fp->fs, FR_INT_ERR); 01782 if (!(fp->flag & FA_READ)) /* Check access mode */ 01783 LEAVE_FF(fp->fs, FR_DENIED); 01784 remain = fp->fsize - fp->fptr; 01785 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 01786 01787 for ( ; btr; /* Repeat until all data transferred */ 01788 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { 01789 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 01790 if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */ 01791 clst = (fp->fptr == 0) ? /* On the top of the file? */ 01792 fp->org_clust : get_fat(fp->fs, fp->curr_clust); 01793 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); 01794 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 01795 fp->curr_clust = clst; /* Update current cluster */ 01796 fp->csect = 0; /* Reset sector offset in the cluster */ 01797 } 01798 sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */ 01799 if (!sect) ABORT(fp->fs, FR_INT_ERR); 01800 sect += fp->csect; 01801 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ 01802 if (cc) { /* Read maximum contiguous sectors directly */ 01803 if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 01804 cc = fp->fs->csize - fp->csect; 01805 if (disk_read(fp->fs->drive, rbuff, sect, (BYTE)cc) != RES_OK) 01806 ABORT(fp->fs, FR_DISK_ERR); 01807 #if !_FS_READONLY && _FS_MINIMIZE <= 2 01808 #if _FS_TINY 01809 if (fp->fs->wflag && fp->fs->winsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */ 01810 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs)); 01811 #else 01812 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */ 01813 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); 01814 #endif 01815 #endif 01816 fp->csect += (BYTE)cc; /* Next sector address in the cluster */ 01817 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 01818 continue; 01819 } 01820 #if !_FS_TINY 01821 #if !_FS_READONLY 01822 if (fp->flag & FA__DIRTY) { /* Write sector I/O buffer if needed */ 01823 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK) 01824 ABORT(fp->fs, FR_DISK_ERR); 01825 fp->flag &= ~FA__DIRTY; 01826 } 01827 #endif 01828 if (fp->dsect != sect) { /* Fill sector buffer with file data */ 01829 if (disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK) 01830 ABORT(fp->fs, FR_DISK_ERR); 01831 } 01832 #endif 01833 fp->dsect = sect; 01834 fp->csect++; /* Next sector address in the cluster */ 01835 } 01836 rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ 01837 if (rcnt > btr) rcnt = btr; 01838 #if _FS_TINY 01839 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 01840 ABORT(fp->fs, FR_DISK_ERR); 01841 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 01842 #else 01843 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 01844 #endif 01845 } 01846 01847 LEAVE_FF(fp->fs, FR_OK); 01848 } 01849 01850 01851 01852 01853 #if !_FS_READONLY 01854 /*-----------------------------------------------------------------------*/ 01855 /* Write File */ 01856 /*-----------------------------------------------------------------------*/ 01857 01858 FRESULT f_write ( 01859 FIL *fp, /* Pointer to the file object */ 01860 const void *buff, /* Pointer to the data to be written */ 01861 UINT btw, /* Number of bytes to write */ 01862 UINT *bw /* Pointer to number of bytes written */ 01863 ) 01864 { 01865 FRESULT res; 01866 DWORD clst, sect; 01867 UINT wcnt, cc; 01868 const BYTE *wbuff = (const BYTE *)buff; 01869 01870 01871 *bw = 0; /* Initialize bytes written */ 01872 01873 res = validate(fp->fs, fp->id); /* Check validity of the object */ 01874 if (res != FR_OK) LEAVE_FF(fp->fs, res); 01875 if (fp->flag & FA__ERROR) /* Check abort flag */ 01876 LEAVE_FF(fp->fs, FR_INT_ERR); 01877 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 01878 LEAVE_FF(fp->fs, FR_DENIED); 01879 if (fp->fsize + btw < fp->fsize) btw = 0; /* File size cannot reach 4GB */ 01880 01881 for ( ; btw; /* Repeat until all data transferred */ 01882 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { 01883 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 01884 if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */ 01885 if (fp->fptr == 0) { /* On the top of the file? */ 01886 clst = fp->org_clust; /* Follow from the origin */ 01887 if (clst == 0) /* When there is no cluster chain, */ 01888 fp->org_clust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ 01889 } else { /* Middle or end of the file */ 01890 clst = create_chain(fp->fs, fp->curr_clust); /* Follow or streach cluster chain */ 01891 } 01892 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 01893 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 01894 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 01895 fp->curr_clust = clst; /* Update current cluster */ 01896 fp->csect = 0; /* Reset sector address in the cluster */ 01897 } 01898 #if _FS_TINY 01899 if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write back data buffer prior to following direct transfer */ 01900 ABORT(fp->fs, FR_DISK_ERR); 01901 #else 01902 if (fp->flag & FA__DIRTY) { /* Write back data buffer prior to following direct transfer */ 01903 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK) 01904 ABORT(fp->fs, FR_DISK_ERR); 01905 fp->flag &= ~FA__DIRTY; 01906 } 01907 #endif 01908 sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */ 01909 if (!sect) ABORT(fp->fs, FR_INT_ERR); 01910 sect += fp->csect; 01911 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ 01912 if (cc) { /* Write maximum contiguous sectors directly */ 01913 if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 01914 cc = fp->fs->csize - fp->csect; 01915 if (disk_write(fp->fs->drive, wbuff, sect, (BYTE)cc) != RES_OK) 01916 ABORT(fp->fs, FR_DISK_ERR); 01917 #if _FS_TINY 01918 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */ 01919 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); 01920 fp->fs->wflag = 0; 01921 } 01922 #else 01923 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */ 01924 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); 01925 fp->flag &= ~FA__DIRTY; 01926 } 01927 #endif 01928 fp->csect += (BYTE)cc; /* Next sector address in the cluster */ 01929 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 01930 continue; 01931 } 01932 #if _FS_TINY 01933 if (fp->fptr >= fp->fsize) { /* Avoid silly buffer filling at growing edge */ 01934 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR); 01935 fp->fs->winsect = sect; 01936 } 01937 #else 01938 if (fp->dsect != sect) { /* Fill sector buffer with file data */ 01939 if (fp->fptr < fp->fsize && 01940 disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK) 01941 ABORT(fp->fs, FR_DISK_ERR); 01942 } 01943 #endif 01944 fp->dsect = sect; 01945 fp->csect++; /* Next sector address in the cluster */ 01946 } 01947 wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Put partial sector into file I/O buffer */ 01948 if (wcnt > btw) wcnt = btw; 01949 #if _FS_TINY 01950 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 01951 ABORT(fp->fs, FR_DISK_ERR); 01952 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 01953 fp->fs->wflag = 1; 01954 #else 01955 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 01956 fp->flag |= FA__DIRTY; 01957 #endif 01958 } 01959 01960 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ 01961 fp->flag |= FA__WRITTEN; /* Set file changed flag */ 01962 01963 LEAVE_FF(fp->fs, FR_OK); 01964 } 01965 01966 01967 01968 01969 /*-----------------------------------------------------------------------*/ 01970 /* Synchronize the File Object */ 01971 /*-----------------------------------------------------------------------*/ 01972 01973 FRESULT f_sync ( 01974 FIL *fp /* Pointer to the file object */ 01975 ) 01976 { 01977 FRESULT res; 01978 DWORD tim; 01979 BYTE *dir; 01980 01981 01982 res = validate(fp->fs, fp->id); /* Check validity of the object */ 01983 if (res == FR_OK) { 01984 if (fp->flag & FA__WRITTEN) { /* Has the file been written? */ 01985 #if !_FS_TINY /* Write-back dirty buffer */ 01986 if (fp->flag & FA__DIRTY) { 01987 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK) 01988 LEAVE_FF(fp->fs, FR_DISK_ERR); 01989 fp->flag &= ~FA__DIRTY; 01990 } 01991 #endif 01992 /* Update the directory entry */ 01993 res = move_window(fp->fs, fp->dir_sect); 01994 if (res == FR_OK) { 01995 dir = fp->dir_ptr; 01996 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ 01997 ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */ 01998 ST_WORD(dir+DIR_FstClusLO, fp->org_clust); /* Update start cluster */ 01999 ST_WORD(dir+DIR_FstClusHI, fp->org_clust >> 16); 02000 tim = get_fattime(); /* Updated time */ 02001 ST_DWORD(dir+DIR_WrtTime, tim); 02002 fp->flag &= ~FA__WRITTEN; 02003 fp->fs->wflag = 1; 02004 res = sync(fp->fs); 02005 } 02006 } 02007 } 02008 02009 LEAVE_FF(fp->fs, res); 02010 } 02011 02012 #endif /* !_FS_READONLY */ 02013 02014 02015 02016 02017 /*-----------------------------------------------------------------------*/ 02018 /* Close File */ 02019 /*-----------------------------------------------------------------------*/ 02020 02021 FRESULT f_close ( 02022 FIL *fp /* Pointer to the file object to be closed */ 02023 ) 02024 { 02025 FRESULT res; 02026 02027 02028 #if _FS_READONLY 02029 res = validate(fp->fs, fp->id); 02030 if (res == FR_OK) fp->fs = NULL; 02031 LEAVE_FF(fp->fs, res); 02032 #else 02033 res = f_sync(fp); 02034 if (res == FR_OK) fp->fs = NULL; 02035 return res; 02036 #endif 02037 } 02038 02039 02040 02041 02042 /*-----------------------------------------------------------------------*/ 02043 /* Change Current Drive/Directory */ 02044 /*-----------------------------------------------------------------------*/ 02045 02046 #if _FS_RPATH 02047 02048 FRESULT f_chdrive ( 02049 BYTE drv /* Drive number */ 02050 ) 02051 { 02052 if (drv >= _DRIVES) return FR_INVALID_DRIVE; 02053 02054 Drive = drv; 02055 02056 return FR_OK; 02057 } 02058 02059 02060 02061 02062 FRESULT f_chdir ( 02063 const XCHAR *path /* Pointer to the directory path */ 02064 ) 02065 { 02066 FRESULT res; 02067 DIR dj; 02068 NAMEBUF(sfn, lfn); 02069 BYTE *dir; 02070 02071 02072 res = chk_mounted(&path, &dj.fs, 0); 02073 if (res == FR_OK) { 02074 INITBUF(dj, sfn, lfn); 02075 res = follow_path(&dj, path); /* Follow the file path */ 02076 if (res == FR_OK) { /* Follow completed */ 02077 dir = dj.dir; /* Pointer to the entry */ 02078 if (!dir) { 02079 dj.fs->cdir = 0; /* No entry (root dir) */ 02080 } else { 02081 if (dir[DIR_Attr] & AM_DIR) /* Reached to the dir */ 02082 dj.fs->cdir = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO); 02083 else 02084 res = FR_NO_PATH; /* Could not reach the dir (it is a file) */ 02085 } 02086 } 02087 if (res == FR_NO_FILE) res = FR_NO_PATH; 02088 } 02089 02090 LEAVE_FF(dj.fs, res); 02091 } 02092 02093 #endif 02094 02095 02096 02097 #if _FS_MINIMIZE <= 2 02098 /*-----------------------------------------------------------------------*/ 02099 /* Seek File R/W Pointer */ 02100 /*-----------------------------------------------------------------------*/ 02101 02102 FRESULT f_lseek ( 02103 FIL *fp, /* Pointer to the file object */ 02104 DWORD ofs /* File pointer from top of file */ 02105 ) 02106 { 02107 FRESULT res; 02108 DWORD clst, bcs, nsect, ifptr; 02109 02110 02111 res = validate(fp->fs, fp->id); /* Check validity of the object */ 02112 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02113 if (fp->flag & FA__ERROR) /* Check abort flag */ 02114 LEAVE_FF(fp->fs, FR_INT_ERR); 02115 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ 02116 #if !_FS_READONLY 02117 && !(fp->flag & FA_WRITE) 02118 #endif 02119 ) ofs = fp->fsize; 02120 02121 ifptr = fp->fptr; 02122 fp->fptr = nsect = 0; fp->csect = 255; 02123 if (ofs > 0) { 02124 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ 02125 if (ifptr > 0 && 02126 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 02127 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ 02128 ofs -= fp->fptr; 02129 clst = fp->curr_clust; 02130 } else { /* When seek to back cluster, */ 02131 clst = fp->org_clust; /* start from the first cluster */ 02132 #if !_FS_READONLY 02133 if (clst == 0) { /* If no cluster chain, create a new chain */ 02134 clst = create_chain(fp->fs, 0); 02135 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 02136 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02137 fp->org_clust = clst; 02138 } 02139 #endif 02140 fp->curr_clust = clst; 02141 } 02142 if (clst != 0) { 02143 while (ofs > bcs) { /* Cluster following loop */ 02144 #if !_FS_READONLY 02145 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 02146 clst = create_chain(fp->fs, clst); /* Force streached if in write mode */ 02147 if (clst == 0) { /* When disk gets full, clip file size */ 02148 ofs = bcs; break; 02149 } 02150 } else 02151 #endif 02152 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ 02153 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02154 if (clst <= 1 || clst >= fp->fs->max_clust) ABORT(fp->fs, FR_INT_ERR); 02155 fp->curr_clust = clst; 02156 fp->fptr += bcs; 02157 ofs -= bcs; 02158 } 02159 fp->fptr += ofs; 02160 fp->csect = (BYTE)(ofs / SS(fp->fs)); /* Sector offset in the cluster */ 02161 if (ofs % SS(fp->fs)) { 02162 nsect = clust2sect(fp->fs, clst); /* Current sector */ 02163 if (!nsect) ABORT(fp->fs, FR_INT_ERR); 02164 nsect += fp->csect; 02165 fp->csect++; 02166 } 02167 } 02168 } 02169 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { 02170 #if !_FS_TINY 02171 #if !_FS_READONLY 02172 if (fp->flag & FA__DIRTY) { /* Write-back dirty buffer if needed */ 02173 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK) 02174 ABORT(fp->fs, FR_DISK_ERR); 02175 fp->flag &= ~FA__DIRTY; 02176 } 02177 #endif 02178 if (disk_read(fp->fs->drive, fp->buf, nsect, 1) != RES_OK) 02179 ABORT(fp->fs, FR_DISK_ERR); 02180 #endif 02181 fp->dsect = nsect; 02182 } 02183 #if !_FS_READONLY 02184 if (fp->fptr > fp->fsize) { /* Set changed flag if the file size is extended */ 02185 fp->fsize = fp->fptr; 02186 fp->flag |= FA__WRITTEN; 02187 } 02188 #endif 02189 02190 LEAVE_FF(fp->fs, res); 02191 } 02192 02193 02194 02195 02196 #if _FS_MINIMIZE <= 1 02197 /*-----------------------------------------------------------------------*/ 02198 /* Create a Directroy Object */ 02199 /*-----------------------------------------------------------------------*/ 02200 02201 FRESULT f_opendir ( 02202 eDIR *dj, /* Pointer to directory object to create */ 02203 const XCHAR *path /* Pointer to the directory path */ 02204 ) 02205 { 02206 FRESULT res; 02207 NAMEBUF(sfn, lfn); 02208 BYTE *dir; 02209 02210 02211 res = chk_mounted(&path, &dj->fs, 0); 02212 if (res == FR_OK) { 02213 INITBUF((*dj), sfn, lfn); 02214 res = follow_path(dj, path); /* Follow the path to the directory */ 02215 if (res == FR_OK) { /* Follow completed */ 02216 dir = dj->dir; 02217 if (dir) { /* It is not the root dir */ 02218 if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */ 02219 dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO); 02220 } else { /* The object is not a directory */ 02221 res = FR_NO_PATH; 02222 } 02223 } 02224 if (res == FR_OK) { 02225 dj->id = dj->fs->id; 02226 res = dir_seek(dj, 0); /* Rewind dir */ 02227 } 02228 } 02229 if (res == FR_NO_FILE) res = FR_NO_PATH; 02230 } 02231 02232 LEAVE_FF(dj->fs, res); 02233 } 02234 02235 02236 02237 02238 /*-----------------------------------------------------------------------*/ 02239 /* Read Directory Entry in Sequense */ 02240 /*-----------------------------------------------------------------------*/ 02241 02242 FRESULT f_readdir ( 02243 eDIR *dj, /* Pointer to the open directory object */ 02244 FILINFO *fno /* Pointer to file information to return */ 02245 ) 02246 { 02247 FRESULT res; 02248 NAMEBUF(sfn, lfn); 02249 02250 02251 res = validate(dj->fs, dj->id); /* Check validity of the object */ 02252 if (res == FR_OK) { 02253 INITBUF((*dj), sfn, lfn); 02254 if (!fno) { 02255 res = dir_seek(dj, 0); 02256 } else { 02257 res = dir_read(dj); 02258 if (res == FR_NO_FILE) { 02259 dj->sect = 0; 02260 res = FR_OK; 02261 } 02262 if (res == FR_OK) { /* A valid entry is found */ 02263 get_fileinfo(dj, fno); /* Get the object information */ 02264 res = dir_next(dj, FALSE); /* Increment index for next */ 02265 if (res == FR_NO_FILE) { 02266 dj->sect = 0; 02267 res = FR_OK; 02268 } 02269 } 02270 } 02271 } 02272 02273 LEAVE_FF(dj->fs, res); 02274 } 02275 02276 02277 02278 #if _FS_MINIMIZE == 0 02279 /*-----------------------------------------------------------------------*/ 02280 /* Get File Status */ 02281 /*-----------------------------------------------------------------------*/ 02282 02283 FRESULT f_stat ( 02284 const XCHAR *path, /* Pointer to the file path */ 02285 FILINFO *fno /* Pointer to file information to return */ 02286 ) 02287 { 02288 FRESULT res; 02289 eDIR dj; 02290 NAMEBUF(sfn, lfn); 02291 02292 02293 res = chk_mounted(&path, &dj.fs, 0); 02294 if (res == FR_OK) { 02295 INITBUF(dj, sfn, lfn); 02296 res = follow_path(&dj, path); /* Follow the file path */ 02297 if (res == FR_OK) { /* Follwo completed */ 02298 if (dj.dir) /* Found an object */ 02299 get_fileinfo(&dj, fno); 02300 else /* It is root dir */ 02301 res = FR_INVALID_NAME; 02302 } 02303 } 02304 02305 LEAVE_FF(dj.fs, res); 02306 } 02307 02308 02309 02310 #if !_FS_READONLY 02311 /*-----------------------------------------------------------------------*/ 02312 /* Get Number of Free Clusters */ 02313 /*-----------------------------------------------------------------------*/ 02314 02315 FRESULT f_getfree ( 02316 const XCHAR *path, /* Pointer to the logical drive number (root dir) */ 02317 DWORD *nclst, /* Pointer to the variable to return number of free clusters */ 02318 FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */ 02319 ) 02320 { 02321 FRESULT res; 02322 DWORD n, clst, sect, stat; 02323 UINT i; 02324 BYTE fat, *p; 02325 02326 02327 /* Get drive number */ 02328 res = chk_mounted(&path, fatfs, 0); 02329 if (res != FR_OK) LEAVE_FF(*fatfs, res); 02330 02331 /* If number of free cluster is valid, return it without cluster scan. */ 02332 if ((*fatfs)->free_clust <= (*fatfs)->max_clust - 2) { 02333 *nclst = (*fatfs)->free_clust; 02334 LEAVE_FF(*fatfs, FR_OK); 02335 } 02336 02337 /* Get number of free clusters */ 02338 fat = (*fatfs)->fs_type; 02339 n = 0; 02340 if (fat == FS_FAT12) { 02341 clst = 2; 02342 do { 02343 stat = get_fat(*fatfs, clst); 02344 if (stat == 0xFFFFFFFF) LEAVE_FF(*fatfs, FR_DISK_ERR); 02345 if (stat == 1) LEAVE_FF(*fatfs, FR_INT_ERR); 02346 if (stat == 0) n++; 02347 } while (++clst < (*fatfs)->max_clust); 02348 } else { 02349 clst = (*fatfs)->max_clust; 02350 sect = (*fatfs)->fatbase; 02351 i = 0; p = 0; 02352 do { 02353 if (!i) { 02354 res = move_window(*fatfs, sect++); 02355 if (res != FR_OK) 02356 LEAVE_FF(*fatfs, res); 02357 p = (*fatfs)->win; 02358 i = SS(*fatfs); 02359 } 02360 if (fat == FS_FAT16) { 02361 if (LD_WORD(p) == 0) n++; 02362 p += 2; i -= 2; 02363 } else { 02364 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++; 02365 p += 4; i -= 4; 02366 } 02367 } while (--clst); 02368 } 02369 (*fatfs)->free_clust = n; 02370 if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1; 02371 *nclst = n; 02372 02373 LEAVE_FF(*fatfs, FR_OK); 02374 } 02375 02376 02377 02378 02379 /*-----------------------------------------------------------------------*/ 02380 /* Truncate File */ 02381 /*-----------------------------------------------------------------------*/ 02382 02383 FRESULT f_truncate ( 02384 FIL *fp /* Pointer to the file object */ 02385 ) 02386 { 02387 FRESULT res; 02388 DWORD ncl; 02389 02390 02391 res = validate(fp->fs, fp->id); /* Check validity of the object */ 02392 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02393 if (fp->flag & FA__ERROR) /* Check abort flag */ 02394 LEAVE_FF(fp->fs, FR_INT_ERR); 02395 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 02396 LEAVE_FF(fp->fs, FR_DENIED); 02397 02398 if (fp->fsize > fp->fptr) { 02399 fp->fsize = fp->fptr; /* Set file size to current R/W point */ 02400 fp->flag |= FA__WRITTEN; 02401 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 02402 res = remove_chain(fp->fs, fp->org_clust); 02403 fp->org_clust = 0; 02404 } else { /* When truncate a part of the file, remove remaining clusters */ 02405 ncl = get_fat(fp->fs, fp->curr_clust); 02406 res = FR_OK; 02407 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 02408 if (ncl == 1) res = FR_INT_ERR; 02409 if (res == FR_OK && ncl < fp->fs->max_clust) { 02410 res = put_fat(fp->fs, fp->curr_clust, 0x0FFFFFFF); 02411 if (res == FR_OK) res = remove_chain(fp->fs, ncl); 02412 } 02413 } 02414 } 02415 if (res != FR_OK) fp->flag |= FA__ERROR; 02416 02417 LEAVE_FF(fp->fs, res); 02418 } 02419 02420 02421 02422 02423 /*-----------------------------------------------------------------------*/ 02424 /* Delete a File or Directory */ 02425 /*-----------------------------------------------------------------------*/ 02426 02427 FRESULT f_unlink ( 02428 const XCHAR *path /* Pointer to the file or directory path */ 02429 ) 02430 { 02431 FRESULT res; 02432 eDIR dj, sdj; 02433 NAMEBUF(sfn, lfn); 02434 BYTE *dir; 02435 DWORD dclst; 02436 02437 02438 res = chk_mounted(&path, &dj.fs, 1); 02439 if (res != FR_OK) LEAVE_FF(dj.fs, res); 02440 02441 INITBUF(dj, sfn, lfn); 02442 res = follow_path(&dj, path); /* Follow the file path */ 02443 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 02444 res = FR_INVALID_NAME; 02445 if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */ 02446 02447 dir = dj.dir; 02448 if (!dir) /* Is it the root directory? */ 02449 LEAVE_FF(dj.fs, FR_INVALID_NAME); 02450 if (dir[DIR_Attr] & AM_RDO) /* Is it a R/O object? */ 02451 LEAVE_FF(dj.fs, FR_DENIED); 02452 dclst = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO); 02453 02454 if (dir[DIR_Attr] & AM_DIR) { /* It is a sub-directory */ 02455 if (dclst < 2) LEAVE_FF(dj.fs, FR_INT_ERR); 02456 mem_cpy(&sdj, &dj, sizeof(eDIR)); /* Check if the sub-dir is empty or not */ 02457 sdj.sclust = dclst; 02458 res = dir_seek(&sdj, 2); 02459 if (res != FR_OK) LEAVE_FF(dj.fs, res); 02460 res = dir_read(&sdj); 02461 if (res == FR_OK) res = FR_DENIED; /* Not empty sub-dir */ 02462 if (res != FR_NO_FILE) LEAVE_FF(dj.fs, res); 02463 } 02464 02465 res = dir_remove(&dj); /* Remove directory entry */ 02466 if (res == FR_OK) { 02467 if (dclst) 02468 res = remove_chain(dj.fs, dclst); /* Remove the cluster chain */ 02469 if (res == FR_OK) res = sync(dj.fs); 02470 } 02471 02472 LEAVE_FF(dj.fs, res); 02473 } 02474 02475 02476 02477 02478 /*-----------------------------------------------------------------------*/ 02479 /* Create a Directory */ 02480 /*-----------------------------------------------------------------------*/ 02481 02482 FRESULT f_mkdir ( 02483 const XCHAR *path /* Pointer to the directory path */ 02484 ) 02485 { 02486 FRESULT res; 02487 eDIR dj; 02488 NAMEBUF(sfn, lfn); 02489 BYTE *dir, n; 02490 DWORD dsect, dclst, pclst, tim; 02491 02492 02493 res = chk_mounted(&path, &dj.fs, 1); 02494 if (res != FR_OK) LEAVE_FF(dj.fs, res); 02495 02496 INITBUF(dj, sfn, lfn); 02497 res = follow_path(&dj, path); /* Follow the file path */ 02498 if (res == FR_OK) res = FR_EXIST; /* Any file or directory is already existing */ 02499 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT)) 02500 res = FR_INVALID_NAME; 02501 if (res != FR_NO_FILE) /* Any error occured */ 02502 LEAVE_FF(dj.fs, res); 02503 02504 dclst = create_chain(dj.fs, 0); /* Allocate a new cluster for new directory table */ 02505 res = FR_OK; 02506 if (dclst == 0) res = FR_DENIED; 02507 if (dclst == 1) res = FR_INT_ERR; 02508 if (dclst == 0xFFFFFFFF) res = FR_DISK_ERR; 02509 if (res == FR_OK) 02510 res = move_window(dj.fs, 0); 02511 if (res != FR_OK) LEAVE_FF(dj.fs, res); 02512 dsect = clust2sect(dj.fs, dclst); 02513 02514 dir = dj.fs->win; /* Initialize the new directory table */ 02515 mem_set(dir, 0, SS(dj.fs)); 02516 mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */ 02517 dir[DIR_Name] = '.'; 02518 dir[DIR_Attr] = AM_DIR; 02519 tim = get_fattime(); 02520 ST_DWORD(dir+DIR_WrtTime, tim); 02521 ST_WORD(dir+DIR_FstClusLO, dclst); 02522 ST_WORD(dir+DIR_FstClusHI, dclst >> 16); 02523 mem_cpy(dir+32, dir, 32); /* Create ".." entry */ 02524 dir[33] = '.'; 02525 pclst = dj.sclust; 02526 if (dj.fs->fs_type == FS_FAT32 && pclst == dj.fs->dirbase) 02527 pclst = 0; 02528 ST_WORD(dir+32+DIR_FstClusLO, pclst); 02529 ST_WORD(dir+32+DIR_FstClusHI, pclst >> 16); 02530 for (n = 0; n < dj.fs->csize; n++) { /* Write dot entries and clear left sectors */ 02531 dj.fs->winsect = dsect++; 02532 dj.fs->wflag = 1; 02533 res = move_window(dj.fs, 0); 02534 if (res) LEAVE_FF(dj.fs, res); 02535 mem_set(dir, 0, SS(dj.fs)); 02536 } 02537 02538 res = dir_register(&dj); 02539 if (res != FR_OK) { 02540 remove_chain(dj.fs, dclst); 02541 } else { 02542 dir = dj.dir; 02543 dir[DIR_Attr] = AM_DIR; /* Attribute */ 02544 ST_DWORD(dir+DIR_WrtTime, tim); /* Crated time */ 02545 ST_WORD(dir+DIR_FstClusLO, dclst); /* Table start cluster */ 02546 ST_WORD(dir+DIR_FstClusHI, dclst >> 16); 02547 dj.fs->wflag = 1; 02548 res = sync(dj.fs); 02549 } 02550 02551 LEAVE_FF(dj.fs, res); 02552 } 02553 02554 02555 02556 02557 /*-----------------------------------------------------------------------*/ 02558 /* Change File Attribute */ 02559 /*-----------------------------------------------------------------------*/ 02560 02561 FRESULT f_chmod ( 02562 const XCHAR *path, /* Pointer to the file path */ 02563 BYTE value, /* Attribute bits */ 02564 BYTE mask /* Attribute mask to change */ 02565 ) 02566 { 02567 FRESULT res; 02568 eDIR dj; 02569 NAMEBUF(sfn, lfn); 02570 BYTE *dir; 02571 02572 02573 res = chk_mounted(&path, &dj.fs, 1); 02574 if (res == FR_OK) { 02575 INITBUF(dj, sfn, lfn); 02576 res = follow_path(&dj, path); /* Follow the file path */ 02577 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 02578 res = FR_INVALID_NAME; 02579 if (res == FR_OK) { 02580 dir = dj.dir; 02581 if (!dir) { /* Is it a root directory? */ 02582 res = FR_INVALID_NAME; 02583 } else { /* File or sub directory */ 02584 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 02585 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 02586 dj.fs->wflag = 1; 02587 res = sync(dj.fs); 02588 } 02589 } 02590 } 02591 02592 LEAVE_FF(dj.fs, res); 02593 } 02594 02595 02596 02597 02598 /*-----------------------------------------------------------------------*/ 02599 /* Change Timestamp */ 02600 /*-----------------------------------------------------------------------*/ 02601 02602 FRESULT f_utime ( 02603 const XCHAR *path, /* Pointer to the file/directory name */ 02604 const FILINFO *fno /* Pointer to the timestamp to be set */ 02605 ) 02606 { 02607 FRESULT res; 02608 eDIR dj; 02609 NAMEBUF(sfn, lfn); 02610 BYTE *dir; 02611 02612 02613 res = chk_mounted(&path, &dj.fs, 1); 02614 if (res == FR_OK) { 02615 INITBUF(dj, sfn, lfn); 02616 res = follow_path(&dj, path); /* Follow the file path */ 02617 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 02618 res = FR_INVALID_NAME; 02619 if (res == FR_OK) { 02620 dir = dj.dir; 02621 if (!dir) { /* Root directory */ 02622 res = FR_INVALID_NAME; 02623 } else { /* File or sub-directory */ 02624 ST_WORD(dir+DIR_WrtTime, fno->ftime); 02625 ST_WORD(dir+DIR_WrtDate, fno->fdate); 02626 dj.fs->wflag = 1; 02627 res = sync(dj.fs); 02628 } 02629 } 02630 } 02631 02632 LEAVE_FF(dj.fs, res); 02633 } 02634 02635 02636 02637 02638 /*-----------------------------------------------------------------------*/ 02639 /* Rename File/Directory */ 02640 /*-----------------------------------------------------------------------*/ 02641 02642 FRESULT f_rename ( 02643 const XCHAR *path_old, /* Pointer to the old name */ 02644 const XCHAR *path_new /* Pointer to the new name */ 02645 ) 02646 { 02647 FRESULT res; 02648 eDIR dj_old, dj_new; 02649 NAMEBUF(sfn, lfn); 02650 BYTE buf[21], *dir; 02651 DWORD dw; 02652 02653 02654 INITBUF(dj_old, sfn, lfn); 02655 res = chk_mounted(&path_old, &dj_old.fs, 1); 02656 if (res == FR_OK) { 02657 dj_new.fs = dj_old.fs; 02658 res = follow_path(&dj_old, path_old); /* Check old object */ 02659 if (_FS_RPATH && res == FR_OK && (dj_old.fn[NS] & NS_DOT)) 02660 res = FR_INVALID_NAME; 02661 } 02662 if (res != FR_OK) LEAVE_FF(dj_old.fs, res); /* The old object is not found */ 02663 02664 if (!dj_old.dir) LEAVE_FF(dj_old.fs, FR_NO_FILE); /* Is root dir? */ 02665 mem_cpy(buf, dj_old.dir+DIR_Attr, 21); /* Save the object information */ 02666 02667 mem_cpy(&dj_new, &dj_old, sizeof(eDIR)); 02668 res = follow_path(&dj_new, path_new); /* Check new object */ 02669 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ 02670 if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */ 02671 res = dir_register(&dj_new); /* Register the new object */ 02672 if (res == FR_OK) { 02673 dir = dj_new.dir; /* Copy object information into new entry */ 02674 mem_cpy(dir+13, buf+2, 19); 02675 dir[DIR_Attr] = buf[0] | AM_ARC; 02676 dj_old.fs->wflag = 1; 02677 if (dir[DIR_Attr] & AM_DIR) { /* Update .. entry in the directory if needed */ 02678 dw = clust2sect(dj_new.fs, (DWORD)LD_WORD(dir+DIR_FstClusHI) | LD_WORD(dir+DIR_FstClusLO)); 02679 if (!dw) { 02680 res = FR_INT_ERR; 02681 } else { 02682 res = move_window(dj_new.fs, dw); 02683 dir = dj_new.fs->win+32; 02684 if (res == FR_OK && dir[1] == '.') { 02685 dw = (dj_new.fs->fs_type == FS_FAT32 && dj_new.sclust == dj_new.fs->dirbase) ? 0 : dj_new.sclust; 02686 ST_WORD(dir+DIR_FstClusLO, dw); 02687 ST_WORD(dir+DIR_FstClusHI, dw >> 16); 02688 dj_new.fs->wflag = 1; 02689 } 02690 } 02691 } 02692 if (res == FR_OK) { 02693 res = dir_remove(&dj_old); /* Remove old entry */ 02694 if (res == FR_OK) 02695 res = sync(dj_old.fs); 02696 } 02697 } 02698 } 02699 02700 LEAVE_FF(dj_old.fs, res); 02701 } 02702 02703 #endif /* !_FS_READONLY */ 02704 #endif /* _FS_MINIMIZE == 0 */ 02705 #endif /* _FS_MINIMIZE <= 1 */ 02706 #endif /* _FS_MINIMIZE <= 2 */ 02707 02708 02709 02710 /*-----------------------------------------------------------------------*/ 02711 /* Forward data to the stream directly (Available on only _FS_TINY cfg) */ 02712 /*-----------------------------------------------------------------------*/ 02713 #if _USE_FORWARD && _FS_TINY 02714 02715 FRESULT f_forward ( 02716 FIL *fp, /* Pointer to the file object */ 02717 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 02718 UINT btr, /* Number of bytes to forward */ 02719 UINT *bf /* Pointer to number of bytes forwarded */ 02720 ) 02721 { 02722 FRESULT res; 02723 DWORD remain, clst, sect; 02724 UINT rcnt; 02725 02726 02727 *bf = 0; 02728 02729 res = validate(fp->fs, fp->id); /* Check validity of the object */ 02730 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02731 if (fp->flag & FA__ERROR) /* Check error flag */ 02732 LEAVE_FF(fp->fs, FR_INT_ERR); 02733 if (!(fp->flag & FA_READ)) /* Check access mode */ 02734 LEAVE_FF(fp->fs, FR_DENIED); 02735 02736 remain = fp->fsize - fp->fptr; 02737 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 02738 02739 for ( ; btr && (*func)(NULL, 0); /* Repeat until all data transferred or stream becomes busy */ 02740 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) { 02741 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02742 if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */ 02743 clst = (fp->fptr == 0) ? /* On the top of the file? */ 02744 fp->org_clust : get_fat(fp->fs, fp->curr_clust); 02745 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); 02746 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02747 fp->curr_clust = clst; /* Update current cluster */ 02748 fp->csect = 0; /* Reset sector address in the cluster */ 02749 } 02750 fp->csect++; /* Next sector address in the cluster */ 02751 } 02752 sect = clust2sect(fp->fs, fp->curr_clust); /* Get current data sector */ 02753 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02754 sect += fp->csect - 1; 02755 if (move_window(fp->fs, sect)) /* Move sector window */ 02756 ABORT(fp->fs, FR_DISK_ERR); 02757 fp->dsect = sect; 02758 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ 02759 if (rcnt > btr) rcnt = btr; 02760 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt); 02761 if (!rcnt) ABORT(fp->fs, FR_INT_ERR); 02762 } 02763 02764 LEAVE_FF(fp->fs, FR_OK); 02765 } 02766 #endif /* _USE_FORWARD */ 02767 02768 02769 02770 #if _USE_MKFS && !_FS_READONLY 02771 /*-----------------------------------------------------------------------*/ 02772 /* Create File System on the Drive */ 02773 /*-----------------------------------------------------------------------*/ 02774 #define N_ROOTDIR 512 /* Multiple of 32 and <= 2048 */ 02775 #define N_FATS 1 /* 1 or 2 */ 02776 #define MAX_SECTOR 131072000UL /* Maximum partition size */ 02777 #define MIN_SECTOR 2000UL /* Minimum partition size */ 02778 02779 02780 FRESULT f_mkfs ( 02781 BYTE drv, /* Logical drive number */ 02782 BYTE partition, /* Partitioning rule 0:FDISK, 1:SFD */ 02783 WORD allocsize /* Allocation unit size [bytes] */ 02784 ) 02785 { 02786 static const DWORD sstbl[] = { 2048000, 1024000, 512000, 256000, 128000, 64000, 32000, 16000, 8000, 4000, 0 }; 02787 static const WORD cstbl[] = { 32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512 }; 02788 BYTE fmt, m, *tbl; 02789 DWORD b_part, b_fat, b_dir, b_data; /* Area offset (LBA) */ 02790 DWORD n_part, n_rsv, n_fat, n_dir; /* Area size */ 02791 DWORD n_clst, d, n; 02792 WORD as; 02793 FATFS *fs; 02794 DSTATUS stat; 02795 02796 02797 /* Check validity of the parameters */ 02798 if (drv >= _DRIVES) return FR_INVALID_DRIVE; 02799 if (partition >= 2) return FR_MKFS_ABORTED; 02800 02801 /* Check mounted drive and clear work area */ 02802 fs = FatFs[drv]; 02803 if (!fs) return FR_NOT_ENABLED; 02804 fs->fs_type = 0; 02805 drv = LD2PD(drv); 02806 02807 /* Get disk statics */ 02808 stat = disk_initialize(drv); 02809 if (stat & STA_NOINIT) return FR_NOT_READY; 02810 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 02811 #if _MAX_SS != 512 /* Get disk sector size */ 02812 if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK 02813 || SS(fs) > _MAX_SS) 02814 return FR_MKFS_ABORTED; 02815 #endif 02816 if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_part) != RES_OK || n_part < MIN_SECTOR) 02817 return FR_MKFS_ABORTED; 02818 if (n_part > MAX_SECTOR) n_part = MAX_SECTOR; 02819 b_part = (!partition) ? 63 : 0; /* Boot sector */ 02820 n_part -= b_part; 02821 for (d = 512; d <= 32768U && d != allocsize; d <<= 1) ; /* Check validity of the allocation unit size */ 02822 if (d != allocsize) allocsize = 0; 02823 if (!allocsize) { /* Auto selection of cluster size */ 02824 d = n_part; 02825 for (as = SS(fs); as > 512U; as >>= 1) d >>= 1; 02826 for (n = 0; d < sstbl[n]; n++) ; 02827 allocsize = cstbl[n]; 02828 } 02829 if (allocsize < SS(fs)) allocsize = SS(fs); 02830 02831 allocsize /= SS(fs); /* Number of sectors per cluster */ 02832 02833 /* Pre-compute number of clusters and FAT type */ 02834 n_clst = n_part / allocsize; 02835 fmt = FS_FAT12; 02836 if (n_clst >= 0xFF5) fmt = FS_FAT16; 02837 if (n_clst >= 0xFFF5) fmt = FS_FAT32; 02838 02839 /* Determine offset and size of FAT structure */ 02840 switch (fmt) { 02841 case FS_FAT12: 02842 n_fat = ((n_clst * 3 + 1) / 2 + 3 + SS(fs) - 1) / SS(fs); 02843 n_rsv = 1 + partition; 02844 n_dir = N_ROOTDIR * 32 / SS(fs); 02845 break; 02846 case FS_FAT16: 02847 n_fat = ((n_clst * 2) + 4 + SS(fs) - 1) / SS(fs); 02848 n_rsv = 1 + partition; 02849 n_dir = N_ROOTDIR * 32 / SS(fs); 02850 break; 02851 default: 02852 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); 02853 n_rsv = 33 - partition; 02854 n_dir = 0; 02855 } 02856 b_fat = b_part + n_rsv; /* FATs start sector */ 02857 b_dir = b_fat + n_fat * N_FATS; /* Directory start sector */ 02858 b_data = b_dir + n_dir; /* Data start sector */ 02859 02860 /* Align data start sector to erase block boundary (for flash memory media) */ 02861 if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK) return FR_MKFS_ABORTED; 02862 n = (b_data + n - 1) & ~(n - 1); 02863 n_fat += (n - b_data) / N_FATS; 02864 /* b_dir and b_data are no longer used below */ 02865 02866 /* Determine number of cluster and final check of validity of the FAT type */ 02867 n_clst = (n_part - n_rsv - n_fat * N_FATS - n_dir) / allocsize; 02868 if ( (fmt == FS_FAT16 && n_clst < 0xFF5) 02869 || (fmt == FS_FAT32 && n_clst < 0xFFF5)) 02870 return FR_MKFS_ABORTED; 02871 02872 /* Create partition table if needed */ 02873 if (!partition) { 02874 DWORD n_disk = b_part + n_part; 02875 02876 mem_set(fs->win, 0, SS(fs)); 02877 tbl = fs->win+MBR_Table; 02878 ST_DWORD(tbl, 0x00010180); /* Partition start in CHS */ 02879 if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */ 02880 n_disk = n_disk / 63 / 255; 02881 tbl[7] = (BYTE)n_disk; 02882 tbl[6] = (BYTE)((n_disk >> 2) | 63); 02883 } else { 02884 ST_WORD(&tbl[6], 0xFFFF); 02885 } 02886 tbl[5] = 254; 02887 if (fmt != FS_FAT32) /* System ID */ 02888 tbl[4] = (n_part < 0x10000) ? 0x04 : 0x06; 02889 else 02890 tbl[4] = 0x0c; 02891 ST_DWORD(tbl+8, 63); /* Partition start in LBA */ 02892 ST_DWORD(tbl+12, n_part); /* Partition size in LBA */ 02893 ST_WORD(tbl+64, 0xAA55); /* Signature */ 02894 if (disk_write(drv, fs->win, 0, 1) != RES_OK) 02895 return FR_DISK_ERR; 02896 partition = 0xF8; 02897 } else { 02898 partition = 0xF0; 02899 } 02900 02901 /* Create boot record */ 02902 tbl = fs->win; /* Clear buffer */ 02903 mem_set(tbl, 0, SS(fs)); 02904 ST_DWORD(tbl+BS_jmpBoot, 0x90FEEB); /* Boot code (jmp $, nop) */ 02905 ST_WORD(tbl+BPB_BytsPerSec, SS(fs)); /* Sector size */ 02906 tbl[BPB_SecPerClus] = (BYTE)allocsize; /* Sectors per cluster */ 02907 ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ 02908 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ 02909 ST_WORD(tbl+BPB_RootEntCnt, SS(fs) / 32 * n_dir); /* Number of rootdir entries */ 02910 if (n_part < 0x10000) { /* Number of total sectors */ 02911 ST_WORD(tbl+BPB_TotSec16, n_part); 02912 } else { 02913 ST_DWORD(tbl+BPB_TotSec32, n_part); 02914 } 02915 tbl[BPB_Media] = partition; /* Media descripter */ 02916 ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */ 02917 ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */ 02918 ST_DWORD(tbl+BPB_HiddSec, b_part); /* Hidden sectors */ 02919 n = get_fattime(); /* Use current time as a VSN */ 02920 if (fmt != FS_FAT32) { 02921 ST_DWORD(tbl+BS_VolID, n); /* Volume serial number */ 02922 ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of secters per FAT */ 02923 tbl[BS_DrvNum] = 0x80; /* Drive number */ 02924 tbl[BS_BootSig] = 0x29; /* Extended boot signature */ 02925 mem_cpy(tbl+BS_VolLab, "NO NAME FAT ", 19); /* Volume lavel, FAT signature */ 02926 } else { 02927 ST_DWORD(tbl+BS_VolID32, n); /* Volume serial number */ 02928 ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of secters per FAT */ 02929 ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory cluster (2) */ 02930 ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (bs+1) */ 02931 ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (bs+6) */ 02932 tbl[BS_DrvNum32] = 0x80; /* Drive number */ 02933 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ 02934 mem_cpy(tbl+BS_VolLab32, "NO NAME FAT32 ", 19); /* Volume lavel, FAT signature */ 02935 } 02936 ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature */ 02937 if (SS(fs) > 512U) { 02938 ST_WORD(tbl+SS(fs)-2, 0xAA55); 02939 } 02940 if (disk_write(drv, tbl, b_part+0, 1) != RES_OK) 02941 return FR_DISK_ERR; 02942 if (fmt == FS_FAT32) 02943 disk_write(drv, tbl, b_part+6, 1); 02944 02945 /* Initialize FAT area */ 02946 for (m = 0; m < N_FATS; m++) { 02947 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ 02948 if (fmt != FS_FAT32) { 02949 n = (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; 02950 n |= partition; 02951 ST_DWORD(tbl, n); /* Reserve cluster #0-1 (FAT12/16) */ 02952 } else { 02953 ST_DWORD(tbl+0, 0xFFFFFFF8); /* Reserve cluster #0-1 (FAT32) */ 02954 ST_DWORD(tbl+4, 0xFFFFFFFF); 02955 ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */ 02956 } 02957 if (disk_write(drv, tbl, b_fat++, 1) != RES_OK) 02958 return FR_DISK_ERR; 02959 mem_set(tbl, 0, SS(fs)); /* Following FAT entries are filled by zero */ 02960 for (n = 1; n < n_fat; n++) { 02961 if (disk_write(drv, tbl, b_fat++, 1) != RES_OK) 02962 return FR_DISK_ERR; 02963 } 02964 } 02965 02966 /* Initialize Root directory */ 02967 m = (BYTE)((fmt == FS_FAT32) ? allocsize : n_dir); 02968 do { 02969 if (disk_write(drv, tbl, b_fat++, 1) != RES_OK) 02970 return FR_DISK_ERR; 02971 } while (--m); 02972 02973 /* Create FSInfo record if needed */ 02974 if (fmt == FS_FAT32) { 02975 ST_WORD(tbl+BS_55AA, 0xAA55); 02976 ST_DWORD(tbl+FSI_LeadSig, 0x41615252); 02977 ST_DWORD(tbl+FSI_StrucSig, 0x61417272); 02978 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); 02979 ST_DWORD(tbl+FSI_Nxt_Free, 0xFFFFFFFF); 02980 disk_write(drv, tbl, b_part+1, 1); 02981 disk_write(drv, tbl, b_part+7, 1); 02982 } 02983 02984 return (disk_ioctl(drv, CTRL_SYNC, (void*)NULL) == RES_OK) ? FR_OK : FR_DISK_ERR; 02985 } 02986 02987 #endif /* _USE_MKFS && !_FS_READONLY */ 02988 02989 02990 02991 02992 #if _USE_STRFUNC 02993 /*-----------------------------------------------------------------------*/ 02994 /* Get a string from the file */ 02995 /*-----------------------------------------------------------------------*/ 02996 char* f_gets ( 02997 char* buff, /* Pointer to the string buffer to read */ 02998 int len, /* Size of string buffer */ 02999 FIL* fil /* Pointer to the file object */ 03000 ) 03001 { 03002 int i = 0; 03003 char *p = buff; 03004 UINT rc; 03005 03006 03007 while (i < len - 1) { /* Read bytes until buffer gets filled */ 03008 f_read(fil, p, 1, &rc); 03009 if (rc != 1) break; /* Break when no data to read */ 03010 #if _USE_STRFUNC >= 2 03011 if (*p == '\r') continue; /* Strip '\r' */ 03012 #endif 03013 i++; 03014 if (*p++ == '\n') break; /* Break when reached end of line */ 03015 } 03016 *p = 0; 03017 return i ? buff : NULL; /* When no data read (eof or error), return with error. */ 03018 } 03019 03020 03021 03022 #if !_FS_READONLY 03023 #include <stdarg.h> 03024 /*-----------------------------------------------------------------------*/ 03025 /* Put a character to the file */ 03026 /*-----------------------------------------------------------------------*/ 03027 int f_putc ( 03028 int chr, /* A character to be output */ 03029 FIL* fil /* Ponter to the file object */ 03030 ) 03031 { 03032 UINT bw; 03033 char c; 03034 03035 03036 #if _USE_STRFUNC >= 2 03037 if (chr == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */ 03038 #endif 03039 if (!fil) { /* Special value may be used to switch the destination to any other device */ 03040 /* put_console(chr); */ 03041 return chr; 03042 } 03043 c = (char)chr; 03044 f_write(fil, &c, 1, &bw); /* Write a byte to the file */ 03045 return bw ? chr : EOF; /* Return the result */ 03046 } 03047 03048 03049 03050 03051 /*-----------------------------------------------------------------------*/ 03052 /* Put a string to the file */ 03053 /*-----------------------------------------------------------------------*/ 03054 int f_puts ( 03055 const char* str, /* Pointer to the string to be output */ 03056 FIL* fil /* Pointer to the file object */ 03057 ) 03058 { 03059 int n; 03060 03061 03062 for (n = 0; *str; str++, n++) { 03063 if (f_putc(*str, fil) == EOF) return EOF; 03064 } 03065 return n; 03066 } 03067 03068 03069 03070 03071 /*-----------------------------------------------------------------------*/ 03072 /* Put a formatted string to the file */ 03073 /*-----------------------------------------------------------------------*/ 03074 int f_printf ( 03075 FIL* fil, /* Pointer to the file object */ 03076 const char* str, /* Pointer to the format string */ 03077 ... /* Optional arguments... */ 03078 ) 03079 { 03080 va_list arp; 03081 UCHAR c, f, r; 03082 ULONG val; 03083 char s[16]; 03084 int i, w, res, cc; 03085 03086 03087 va_start(arp, str); 03088 03089 for (cc = res = 0; cc != EOF; res += cc) { 03090 c = *str++; 03091 if (c == 0) break; /* End of string */ 03092 if (c != '%') { /* Non escape cahracter */ 03093 cc = f_putc(c, fil); 03094 if (cc != EOF) cc = 1; 03095 continue; 03096 } 03097 w = f = 0; 03098 c = *str++; 03099 if (c == '0') { /* Flag: '0' padding */ 03100 f = 1; c = *str++; 03101 } 03102 while (c >= '0' && c <= '9') { /* Precision */ 03103 w = w * 10 + (c - '0'); 03104 c = *str++; 03105 } 03106 if (c == 'l') { /* Prefix: Size is long int */ 03107 f |= 2; c = *str++; 03108 } 03109 if (c == 's') { /* Type is string */ 03110 cc = f_puts(va_arg(arp, char*), fil); 03111 continue; 03112 } 03113 if (c == 'c') { /* Type is character */ 03114 cc = f_putc(va_arg(arp, int), fil); 03115 if (cc != EOF) cc = 1; 03116 continue; 03117 } 03118 r = 0; 03119 if (c == 'd') r = 10; /* Type is signed decimal */ 03120 if (c == 'u') r = 10; /* Type is unsigned decimal */ 03121 if (c == 'X') r = 16; /* Type is unsigned hexdecimal */ 03122 if (r == 0) break; /* Unknown type */ 03123 if (f & 2) { /* Get the value */ 03124 val = (ULONG)va_arg(arp, long); 03125 } else { 03126 val = (c == 'd') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int); 03127 } 03128 /* Put numeral string */ 03129 if (c == 'd') { 03130 if (val & 0x80000000) { 03131 val = 0 - val; 03132 f |= 4; 03133 } 03134 } 03135 i = sizeof(s) - 1; s[i] = 0; 03136 do { 03137 c = (UCHAR)(val % r + '0'); 03138 if (c > '9') c += 7; 03139 s[--i] = c; 03140 val /= r; 03141 } while (i && val); 03142 if (i && (f & 4)) s[--i] = '-'; 03143 w = sizeof(s) - 1 - w; 03144 while (i && i > w) s[--i] = (f & 1) ? '0' : ' '; 03145 cc = f_puts(&s[i], fil); 03146 } 03147 03148 va_end(arp); 03149 return (cc == EOF) ? cc : res; 03150 } 03151 03152 #endif /* !_FS_READONLY */ 03153 #endif /* _USE_STRFUNC */
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