BeRTOS
ff.c
00001 /*----------------------------------------------------------------------------/
00002 /  FatFs - FAT file system module  R0.07a                    (C)ChaN, 2009
00003 /-----------------------------------------------------------------------------/
00004 / FatFs module is an open source software to implement FAT file system to
00005 / small embedded systems. This is a free software and is opened for education,
00006 / research and commercial 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 use UNDER YOUR RESPONSIBILITY.
00013 / * Redistributions of source code must retain the above copyright notice.
00014 //-----------------------------------------------------------------------------/
00015 / Feb 26,'06 R0.00  Prototype.
00016 /
00017 / Apr 29,'06 R0.01  First stable version.
00018 /
00019 / Jun 01,'06 R0.02  Added FAT12 support.
00020 /                   Removed unbuffered mode.
00021 /                   Fixed a problem on small (<32M) patition.
00022 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
00023 /
00024 / Sep 22,'06 R0.03  Added f_rename().
00025 /                   Changed option _FS_MINIMUM to _FS_MINIMIZE.
00026 / Dec 11,'06 R0.03a Improved cluster scan algolithm to write files fast.
00027 /                   Fixed f_mkdir() creates incorrect directory on FAT32.
00028 /
00029 / Feb 04,'07 R0.04  Supported multiple drive system.
00030 /                   Changed some interfaces for multiple drive system.
00031 /                   Changed f_mountdrv() to f_mount().
00032 /                   Added f_mkfs().
00033 / Apr 01,'07 R0.04a Supported multiple partitions on a plysical drive.
00034 /                   Added a capability of extending file size to f_lseek().
00035 /                   Added minimization level 3.
00036 /                   Fixed an endian sensitive code in f_mkfs().
00037 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
00038 /                   Added FSInfo support.
00039 /                   Fixed DBCS name can result FR_INVALID_NAME.
00040 /                   Fixed short seek (<= csize) collapses the file object.
00041 /
00042 / Aug 25,'07 R0.05  Changed arguments of f_read(), f_write() and f_mkfs().
00043 /                   Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
00044 /                   Fixed f_mkdir() on FAT32 creates incorrect directory.
00045 / Feb 03,'08 R0.05a Added f_truncate() and f_utime().
00046 /                   Fixed off by one error at FAT sub-type determination.
00047 /                   Fixed btr in f_read() can be mistruncated.
00048 /                   Fixed cached sector is not flushed when create and close
00049 /                   without write.
00050 /
00051 / Apr 01,'08 R0.06  Added fputc(), fputs(), fprintf() and fgets().
00052 /                   Improved performance of f_lseek() on moving to the same
00053 /                   or following cluster.
00054 /
00055 / Apr 01,'09 R0.07  Merged Tiny-FatFs as a buffer configuration option.
00056 /                   Added long file name support.
00057 /                   Added multiple code page support.
00058 /                   Added re-entrancy for multitask operation.
00059 /                   Added auto cluster size selection to f_mkfs().
00060 /                   Added rewind option to f_readdir().
00061 /                   Changed result code of critical errors.
00062 /                   Renamed string functions to avoid name collision.
00063 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
00064 /                   Added multiple sector size support.
00065 /---------------------------------------------------------------------------*/
00066 
00067 #include "ff.h"         /* FatFs configurations and declarations */
00068 #include "diskio.h"     /* Declarations of low level disk I/O functions */
00069 
00070 
00071 /*--------------------------------------------------------------------------
00072 
00073    Module Private Definitions
00074 
00075 ---------------------------------------------------------------------------*/
00076 
00077 #if _FS_REENTRANT
00078 #if _USE_LFN == 1
00079 #error Static LFN work area must not be used in re-entrant configuration.
00080 #endif
00081 #define ENTER_FF(fs)        { if (!lock_fs(fs)) return FR_TIMEOUT; }
00082 #define LEAVE_FF(fs, res)   { unlock_fs(fs, res); return res; }
00083 
00084 #else
00085 #define ENTER_FF(fs)
00086 #define LEAVE_FF(fs, res)   return res
00087 
00088 #endif
00089 
00090 #define ABORT(fs, res)      { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
00091 
00092 #ifndef NULL
00093 #define NULL    0
00094 #endif
00095 
00096 
00097 /*--------------------------------------------------------------------------
00098 
00099    Private Work Area
00100 
00101 ---------------------------------------------------------------------------*/
00102 
00103 static
00104 FATFS *FatFs[_DRIVES];  /* Pointer to the file system objects (logical drives) */
00105 static
00106 WORD Fsid;              /* File system mount ID */
00107 
00108 
00109 #if _USE_LFN == 1   /* LFN with static LFN working buffer */
00110 static
00111 WORD LfnBuf[_MAX_LFN + 1];
00112 #define NAMEBUF(sp,lp)  BYTE sp[12]; WCHAR *lp = LfnBuf
00113 #define INITBUF(dj,sp,lp)   dj.fn = sp; dj.lfn = lp
00114 
00115 #elif _USE_LFN > 1  /* LFN with dynamic LFN working buffer */
00116 #define NAMEBUF(sp,lp)  BYTE sp[12]; WCHAR lbuf[_MAX_LFN + 1], *lp = lbuf
00117 #define INITBUF(dj,sp,lp)   dj.fn = sp; dj.lfn = lp
00118 
00119 #else               /* No LFN */
00120 #define NAMEBUF(sp,lp)  BYTE sp[12]
00121 #define INITBUF(dj,sp,lp)   dj.fn = sp
00122 
00123 #endif
00124 
00125 
00126 
00127 
00128 /*--------------------------------------------------------------------------
00129 
00130    Private Functions
00131 
00132 ---------------------------------------------------------------------------*/
00133 
00134 
00135 /*-----------------------------------------------------------------------*/
00136 /* String functions                                                      */
00137 /*-----------------------------------------------------------------------*/
00138 
00139 /* Copy memory to memory */
00140 static
00141 void mem_cpy (void* dst, const void* src, int cnt) {
00142     char *d = (char*)dst;
00143     const char *s = (const char *)src;
00144     while (cnt--) *d++ = *s++;
00145 }
00146 
00147 /* Fill memory */
00148 static
00149 void mem_set (void* dst, int val, int cnt) {
00150     char *d = (char*)dst;
00151     while (cnt--) *d++ = (char)val;
00152 }
00153 
00154 /* Compare memory to memory */
00155 static
00156 int mem_cmp (const void* dst, const void* src, int cnt) {
00157     const char *d = (const char *)dst, *s = (const char *)src;
00158     int r = 0;
00159     while (cnt-- && (r = *d++ - *s++) == 0) ;
00160     return r;
00161 }
00162 
00163 /* Check if chr is contained in the string */
00164 static
00165 int chk_chr (const char* str, int chr) {
00166     while (*str && *str != chr) str++;
00167     return *str;
00168 }
00169 
00170 
00171 
00172 /*-----------------------------------------------------------------------*/
00173 /* Request/Release grant to access the volume                            */
00174 /*-----------------------------------------------------------------------*/
00175 #if _FS_REENTRANT
00176 
00177 static
00178 BOOL lock_fs (
00179     FATFS *fs       /* File system object */
00180 )
00181 {
00182     return ff_req_grant(fs->sobj);
00183 }
00184 
00185 
00186 static
00187 void unlock_fs (
00188     FATFS *fs,      /* File system object */
00189     FRESULT res     /* Result code to be returned */
00190 )
00191 {
00192     if (res != FR_NOT_ENABLED &&
00193         res != FR_INVALID_DRIVE &&
00194         res != FR_INVALID_OBJECT &&
00195         res != FR_TIMEOUT) {
00196         ff_rel_grant(fs->sobj);
00197     }
00198 }
00199 #endif
00200 
00201 
00202 
00203 /*-----------------------------------------------------------------------*/
00204 /* Change window offset                                                  */
00205 /*-----------------------------------------------------------------------*/
00206 
00207 static
00208 FRESULT move_window (
00209     FATFS *fs,      /* File system object */
00210     DWORD sector    /* Sector number to make apperance in the fs->win[] */
00211 )                   /* Move to zero only writes back dirty window */
00212 {
00213     DWORD wsect;
00214 
00215 
00216     wsect = fs->winsect;
00217     if (wsect != sector) {  /* Changed current window */
00218 #if !_FS_READONLY
00219         if (fs->wflag) {    /* Write back dirty window if needed */
00220             if (disk_write(fs->drive, fs->win, wsect, 1) != RES_OK)
00221                 return FR_DISK_ERR;
00222             fs->wflag = 0;
00223             if (wsect < (fs->fatbase + fs->sects_fat)) {    /* In FAT area */
00224                 BYTE nf;
00225                 for (nf = fs->n_fats; nf >= 2; nf--) {  /* Refrect the change to FAT copy */
00226                     wsect += fs->sects_fat;
00227                     disk_write(fs->drive, fs->win, wsect, 1);
00228                 }
00229             }
00230         }
00231 #endif
00232         if (sector) {
00233             if (disk_read(fs->drive, fs->win, sector, 1) != RES_OK)
00234                 return FR_DISK_ERR;
00235             fs->winsect = sector;
00236         }
00237     }
00238 
00239     return FR_OK;
00240 }
00241 
00242 
00243 
00244 
00245 /*-----------------------------------------------------------------------*/
00246 /* Clean-up cached data                                                  */
00247 /*-----------------------------------------------------------------------*/
00248 #if !_FS_READONLY
00249 static
00250 FRESULT sync (  /* FR_OK: successful, FR_DISK_ERR: failed */
00251     FATFS *fs   /* File system object */
00252 )
00253 {
00254     FRESULT res;
00255 
00256 
00257     res = move_window(fs, 0);
00258     if (res == FR_OK) {
00259         /* Update FSInfo sector if needed */
00260         if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
00261             fs->winsect = 0;
00262             mem_set(fs->win, 0, 512);
00263             ST_WORD(fs->win+BS_55AA, 0xAA55);
00264             ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
00265             ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
00266             ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
00267             ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
00268             disk_write(fs->drive, fs->win, fs->fsi_sector, 1);
00269             fs->fsi_flag = 0;
00270         }
00271         /* Make sure that no pending write process in the physical drive */
00272         if (disk_ioctl(fs->drive, CTRL_SYNC, (void*)NULL) != RES_OK)
00273             res = FR_DISK_ERR;
00274     }
00275 
00276     return res;
00277 }
00278 #endif
00279 
00280 
00281 
00282 
00283 /*-----------------------------------------------------------------------*/
00284 /* Get a cluster status                                                  */
00285 /*-----------------------------------------------------------------------*/
00286 
00287 static
00288 DWORD get_cluster ( /* 0xFFFFFFFF:Disk error, 1:Interal error, Else:Cluster status */
00289     FATFS *fs,      /* File system object */
00290     DWORD clst      /* Cluster# to get the link information */
00291 )
00292 {
00293     WORD wc, bc;
00294     DWORD fsect;
00295 
00296 
00297     if (clst < 2 || clst >= fs->max_clust)  /* Check cluster address range */
00298         return 1;
00299 
00300     fsect = fs->fatbase;
00301     switch (fs->fs_type) {
00302     case FS_FAT12 :
00303         bc = (WORD)clst * 3 / 2;
00304         if (move_window(fs, fsect + (bc / SS(fs)))) break;
00305         wc = fs->win[bc & (SS(fs) - 1)]; bc++;
00306         if (move_window(fs, fsect + (bc / SS(fs)))) break;
00307         wc |= (WORD)fs->win[bc & (SS(fs) - 1)] << 8;
00308         return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
00309 
00310     case FS_FAT16 :
00311         if (move_window(fs, fsect + (clst / (SS(fs) / 2)))) break;
00312         return LD_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)]);
00313 
00314     case FS_FAT32 :
00315         if (move_window(fs, fsect + (clst / (SS(fs) / 4)))) break;
00316         return LD_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)]) & 0x0FFFFFFF;
00317     }
00318 
00319     return 0xFFFFFFFF;  /* An error occured at the disk I/O layer */
00320 }
00321 
00322 
00323 
00324 
00325 /*-----------------------------------------------------------------------*/
00326 /* Change a cluster status                                               */
00327 /*-----------------------------------------------------------------------*/
00328 #if !_FS_READONLY
00329 static
00330 FRESULT put_cluster (
00331     FATFS *fs,      /* File system object */
00332     DWORD clst,     /* Cluster# to be changed (must be 2 to fs->max_clust-1) */
00333     DWORD val       /* New value to mark the cluster */
00334 )
00335 {
00336     WORD bc;
00337     BYTE *p;
00338     DWORD fsect;
00339     FRESULT res;
00340 
00341 
00342     if (clst < 2 || clst >= fs->max_clust) {    /* Check cluster address range */
00343         res = FR_INT_ERR;
00344 
00345     } else {
00346         fsect = fs->fatbase;
00347         switch (fs->fs_type) {
00348         case FS_FAT12 :
00349             bc = (WORD)clst * 3 / 2;
00350             res = move_window(fs, fsect + (bc / SS(fs)));
00351             if (res != FR_OK) break;
00352             p = &fs->win[bc & (SS(fs) - 1)];
00353             *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
00354             bc++;
00355             fs->wflag = 1;
00356             res = move_window(fs, fsect + (bc / SS(fs)));
00357             if (res != FR_OK) break;
00358             p = &fs->win[bc & (SS(fs) - 1)];
00359             *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
00360             break;
00361 
00362         case FS_FAT16 :
00363             res = move_window(fs, fsect + (clst / (SS(fs) / 2)));
00364             if (res != FR_OK) break;
00365             ST_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)], (WORD)val);
00366             break;
00367 
00368         case FS_FAT32 :
00369             res = move_window(fs, fsect + (clst / (SS(fs) / 4)));
00370             if (res != FR_OK) break;
00371             ST_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)], val);
00372             break;
00373 
00374         default :
00375             res = FR_INT_ERR;
00376         }
00377         fs->wflag = 1;
00378     }
00379 
00380     return res;
00381 }
00382 #endif /* !_FS_READONLY */
00383 
00384 
00385 
00386 
00387 /*-----------------------------------------------------------------------*/
00388 /* Remove a cluster chain                                                */
00389 /*-----------------------------------------------------------------------*/
00390 #if !_FS_READONLY
00391 static
00392 FRESULT remove_chain (
00393     FATFS *fs,          /* File system object */
00394     DWORD clst          /* Cluster# to remove chain from */
00395 )
00396 {
00397     FRESULT res;
00398     DWORD nxt;
00399 
00400 
00401     if (clst < 2 || clst >= fs->max_clust) {    /* Check cluster address range */
00402         res = FR_INT_ERR;
00403 
00404     } else {
00405         res = FR_OK;
00406         while (clst < fs->max_clust) {          /* Not a last link? */
00407             nxt = get_cluster(fs, clst);        /* Get cluster status */
00408             if (nxt == 0) break;                /* Empty cluster? */
00409             if (nxt == 1) { res = FR_INT_ERR; break; }  /* Internal error? */
00410             if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }    /* Disk error? */
00411             res = put_cluster(fs, clst, 0);     /* Mark the cluster "empty" */
00412             if (res != FR_OK) break;
00413             if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
00414                 fs->free_clust++;
00415                 fs->fsi_flag = 1;
00416             }
00417             clst = nxt; /* Next cluster */
00418         }
00419     }
00420 
00421     return res;
00422 }
00423 #endif
00424 
00425 
00426 
00427 
00428 /*-----------------------------------------------------------------------*/
00429 /* Stretch or create a cluster chain                                     */
00430 /*-----------------------------------------------------------------------*/
00431 #if !_FS_READONLY
00432 static
00433 DWORD create_chain (    /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
00434     FATFS *fs,          /* File system object */
00435     DWORD clst          /* Cluster# to stretch. 0 means create a new chain. */
00436 )
00437 {
00438     DWORD cs, ncl, scl, mcl;
00439 
00440 
00441     mcl = fs->max_clust;
00442     if (clst == 0) {        /* Create new chain */
00443         scl = fs->last_clust;           /* Get suggested start point */
00444         if (scl == 0 || scl >= mcl) scl = 1;
00445     }
00446     else {                  /* Stretch existing chain */
00447         cs = get_cluster(fs, clst);     /* Check the cluster status */
00448         if (cs < 2) return 1;           /* It is an invalid cluster */
00449         if (cs < mcl) return cs;        /* It is already followed by next cluster */
00450         scl = clst;
00451     }
00452 
00453     ncl = scl;              /* Start cluster */
00454     for (;;) {
00455         ncl++;                          /* Next cluster */
00456         if (ncl >= mcl) {               /* Wrap around */
00457             ncl = 2;
00458             if (ncl > scl) return 0;    /* No free custer */
00459         }
00460         cs = get_cluster(fs, ncl);      /* Get the cluster status */
00461         if (cs == 0) break;             /* Found a free cluster */
00462         if (cs == 0xFFFFFFFF || cs == 1)/* An error occured */
00463             return cs;
00464         if (ncl == scl) return 0;       /* No free custer */
00465     }
00466 
00467     if (put_cluster(fs, ncl, 0x0FFFFFFF))   /* Mark the new cluster "in use" */
00468         return 0xFFFFFFFF;
00469     if (clst != 0) {                        /* Link it to previous one if needed */
00470         if (put_cluster(fs, clst, ncl))
00471             return 0xFFFFFFFF;
00472     }
00473 
00474     fs->last_clust = ncl;               /* Update FSINFO */
00475     if (fs->free_clust != 0xFFFFFFFF) {
00476         fs->free_clust--;
00477         fs->fsi_flag = 1;
00478     }
00479 
00480     return ncl;     /* Return new cluster number */
00481 }
00482 #endif /* !_FS_READONLY */
00483 
00484 
00485 
00486 
00487 /*-----------------------------------------------------------------------*/
00488 /* Get sector# from cluster#                                             */
00489 /*-----------------------------------------------------------------------*/
00490 
00491 static
00492 DWORD clust2sect (  /* !=0: sector number, 0: failed - invalid cluster# */
00493     FATFS *fs,      /* File system object */
00494     DWORD clst      /* Cluster# to be converted */
00495 )
00496 {
00497     clst -= 2;
00498     if (clst >= (fs->max_clust - 2)) return 0;      /* Invalid cluster# */
00499     return clst * fs->csize + fs->database;
00500 }
00501 
00502 
00503 
00504 
00505 /*-----------------------------------------------------------------------*/
00506 /* Seek directory index                                                  */
00507 /*-----------------------------------------------------------------------*/
00508 
00509 static
00510 FRESULT dir_seek (
00511     DIR *dj,        /* Pointer to directory object */
00512     WORD idx        /* Directory index number */
00513 )
00514 {
00515     DWORD clst;
00516     WORD ic;
00517 
00518 
00519     dj->index = idx;
00520     clst = dj->sclust;
00521     if (clst == 1 || clst >= dj->fs->max_clust) /* Check start cluster range */
00522         return FR_INT_ERR;
00523 
00524     if (clst == 0) {    /* Static table */
00525         if (idx >= dj->fs->n_rootdir)       /* Index is out of range */
00526             return FR_INT_ERR;
00527         dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / 32);
00528     }
00529     else {              /* Dynamic table */
00530         ic = SS(dj->fs) / 32 * dj->fs->csize;   /* Indexes per cluster */
00531         while (idx >= ic) { /* Follow cluster chain */
00532             clst = get_cluster(dj->fs, clst);           /* Get next cluster */
00533             if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
00534             if (clst < 2 || clst >= dj->fs->max_clust)  /* Reached to end of table or int error */
00535                 return FR_INT_ERR;
00536             idx -= ic;
00537         }
00538         dj->clust = clst;
00539         dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / 32);
00540     }
00541     dj->dir = dj->fs->win + (idx % (SS(dj->fs) / 32)) * 32;
00542 
00543     return FR_OK;   /* Seek succeeded */
00544 }
00545 
00546 
00547 
00548 
00549 /*-----------------------------------------------------------------------*/
00550 /* Move directory index next                                             */
00551 /*-----------------------------------------------------------------------*/
00552 
00553 static
00554 FRESULT dir_next (  /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not streach */
00555     DIR *dj,        /* Pointer to directory object */
00556     BOOL streach    /* FALSE: Do not streach table, TRUE: Streach table if needed */
00557 )
00558 {
00559     DWORD clst;
00560     WORD i;
00561 
00562 
00563     i = dj->index + 1;
00564     if (!i || !dj->sect)    /* Report EOT when index has reached 65535 */
00565         return FR_NO_FILE;
00566 
00567     if (!(i % (SS(dj->fs) / 32))) { /* Sector changed? */
00568         dj->sect++;                 /* Next sector */
00569 
00570         if (dj->sclust == 0) {  /* Static table */
00571             if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
00572                 return FR_NO_FILE;
00573         }
00574         else {                  /* Dynamic table */
00575             if (((i / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
00576                 clst = get_cluster(dj->fs, dj->clust);          /* Get next cluster */
00577                 if (clst <= 1) return FR_INT_ERR;
00578                 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
00579                 if (clst >= dj->fs->max_clust) {                /* When it reached end of dinamic table */
00580 #if !_FS_READONLY
00581                     BYTE c;
00582                     if (!streach) return FR_NO_FILE;            /* When do not streach, report EOT */
00583                     clst = create_chain(dj->fs, dj->clust);     /* Streach cluster chain */
00584                     if (clst == 0) return FR_DENIED;            /* No free cluster */
00585                     if (clst == 1) return FR_INT_ERR;
00586                     if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
00587                     /* Clean-up streached table */
00588                     if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
00589                     mem_set(dj->fs->win, 0, SS(dj->fs));            /* Clear window buffer */
00590                     dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
00591                     for (c = 0; c < dj->fs->csize; c++) {       /* Fill the new cluster with 0 */
00592                         dj->fs->wflag = 1;
00593                         if (move_window(dj->fs, 0)) return FR_DISK_ERR;
00594                         dj->fs->winsect++;
00595                     }
00596                     dj->fs->winsect -= c;                       /* Rewind window address */
00597 #else
00598                     return FR_NO_FILE;          /* Report EOT */
00599 #endif
00600                 }
00601                 dj->clust = clst;               /* Initialize data for new cluster */
00602                 dj->sect = clust2sect(dj->fs, clst);
00603             }
00604         }
00605     }
00606 
00607     dj->index = i;
00608     dj->dir = dj->fs->win + (i % (SS(dj->fs) / 32)) * 32;
00609 
00610     return FR_OK;
00611 }
00612 
00613 
00614 
00615 
00616 /*-----------------------------------------------------------------------*/
00617 /* Test/Pick/Fit an LFN segment from/to directory entry                  */
00618 /*-----------------------------------------------------------------------*/
00619 #if _USE_LFN
00620 static
00621 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30};  /* Offset of LFN chars in the directory entry */
00622 
00623 
00624 static
00625 BOOL test_lfn (         /* TRUE:Matched, FALSE:Not matched */
00626     WCHAR *lfnbuf,      /* Pointer to the LFN to be compared */
00627     BYTE *dir           /* Pointer to the directory entry containing a part of LFN */
00628 )
00629 {
00630     int i, s;
00631     WCHAR wc1, wc2;
00632 
00633 
00634     i = ((dir[LDIR_Ord] & 0xBF) - 1) * 13;  /* Offset in the LFN buffer */
00635     s = 0;
00636     do {
00637         if (i >= _MAX_LFN) return FALSE;    /* Out of buffer range? */
00638         wc1 = LD_WORD(dir+LfnOfs[s]);       /* Get both characters to compare */
00639         wc2 = lfnbuf[i++];
00640         if (IsLower(wc1)) wc1 -= 0x20;      /* Compare it (ignore case) */
00641         if (IsLower(wc2)) wc2 -= 0x20;
00642         if (wc1 != wc2) return FALSE;
00643     } while (++s < 13 && wc1);              /* Repeat until last char or a NUL char is processed */
00644 
00645     return TRUE;                            /* The LFN entry matched */
00646 }
00647 
00648 
00649 
00650 static
00651 BOOL pick_lfn (         /* TRUE:Succeeded, FALSE:Buffer overflow */
00652     WCHAR *lfnbuf,      /* Pointer to the Unicode-LFN buffer */
00653     BYTE *dir           /* Pointer to the directory entry */
00654 )
00655 {
00656     int i, s;
00657     WCHAR wchr;
00658 
00659 
00660     i = ((dir[LDIR_Ord] & 0xBF) - 1) * 13;  /* Offset in the LFN buffer */
00661     s = 0;
00662     do {
00663         wchr = LD_WORD(dir+LfnOfs[s]);      /* Get an LFN char */
00664         if (!wchr) break;                   /* End of LFN? */
00665         if (i >= _MAX_LFN) return FALSE;    /* Buffer overflow */
00666         lfnbuf[i++] = wchr;                 /* Store it */
00667     } while (++s < 13);                     /* Repeat until last char is copied */
00668     if (dir[LDIR_Ord] & 0x40) lfnbuf[i] = 0;    /* Put terminator if last LFN entry */
00669 
00670     return TRUE;
00671 }
00672 
00673 
00674 #if !_FS_READONLY
00675 static
00676 void fit_lfn (
00677     const WCHAR *lfnbuf,    /* Pointer to the LFN buffer */
00678     BYTE *dir,              /* Pointer to the directory entry */
00679     BYTE ord,               /* LFN order (1-20) */
00680     BYTE sum                /* SFN sum */
00681 )
00682 {
00683     int i, s;
00684     WCHAR wchr;
00685 
00686 
00687     dir[LDIR_Chksum] = sum;         /* Set check sum */
00688     dir[LDIR_Attr] = AM_LFN;        /* Set attribute. LFN entry */
00689     dir[LDIR_Type] = 0;
00690     ST_WORD(dir+LDIR_FstClusLO, 0);
00691 
00692     i = (ord - 1) * 13;             /* Offset in the LFN buffer */
00693     s = wchr = 0;
00694     do {
00695         if (wchr != 0xFFFF) wchr = lfnbuf[i++]; /* Get an effective char */
00696         ST_WORD(dir+LfnOfs[s], wchr);   /* Put it */
00697         if (!wchr) wchr = 0xFFFF;   /* Padding chars following last char */
00698     } while (++s < 13);
00699     if (wchr == 0xFFFF || !lfnbuf[i]) ord |= 0x40;/* Bottom LFN part is the start of LFN sequence */
00700     dir[LDIR_Ord] = ord;            /* Set the LFN order */
00701 }
00702 
00703 #endif
00704 #endif
00705 
00706 
00707 
00708 /*-----------------------------------------------------------------------*/
00709 /* Create numbered name                                                  */
00710 /*-----------------------------------------------------------------------*/
00711 #if _USE_LFN
00712 void gen_numname (
00713     BYTE *dst,          /* Pointer to genartated SFN */
00714     const BYTE *src,    /* Pointer to source SFN to be modified */
00715     const WCHAR *lfn,   /* Pointer to LFN */
00716     WORD num            /* Sequense number */
00717 )
00718 {
00719     char ns[8];
00720     int i, j;
00721 
00722 
00723     mem_cpy(dst, src, 11);
00724 
00725     if (num > 5) {  /* On many collisions, generate a hash number instead of sequencial number */
00726         do num = (num >> 1) + (num << 15) + (WORD)*lfn++; while (*lfn);
00727     }
00728 
00729     /* itoa */
00730     i = 7;
00731     do {
00732         ns[i--] = (num % 10) + '0';
00733         num /= 10;
00734     } while (num);
00735     ns[i] = '~';
00736 
00737     /* Append the number */
00738     for (j = 0; j < i && dst[j] != ' '; j++) {
00739         if (IsDBCS1(dst[j])) {
00740             if (j == i - 1) break;
00741             j++;
00742         }
00743     }
00744     do {
00745         dst[j++] = (i < 8) ? ns[i++] : ' ';
00746     } while (j < 8);
00747 }
00748 #endif
00749 
00750 
00751 
00752 
00753 /*-----------------------------------------------------------------------*/
00754 /* Calculate sum of an SFN                                               */
00755 /*-----------------------------------------------------------------------*/
00756 #if _USE_LFN
00757 static
00758 BYTE sum_sfn (
00759     const BYTE *dir     /* Ptr to directory entry */
00760 )
00761 {
00762     BYTE sum = 0;
00763     int n = 11;
00764 
00765     do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
00766     return sum;
00767 }
00768 #endif
00769 
00770 
00771 
00772 
00773 /*-----------------------------------------------------------------------*/
00774 /* Find an object in the directory                                       */
00775 /*-----------------------------------------------------------------------*/
00776 
00777 static
00778 FRESULT dir_find (
00779     DIR *dj         /* Pointer to the directory object linked to the file name */
00780 )
00781 {
00782     FRESULT res;
00783     BYTE a, c, lfen, ord, sum, *dir;
00784 
00785 
00786     res = dir_seek(dj, 0);          /* Rewind directory object */
00787     if (res != FR_OK) return res;
00788 
00789     ord = sum = 0xFF; lfen = *(dj->fn+11) & 1;
00790     do {
00791         res = move_window(dj->fs, dj->sect);
00792         if (res != FR_OK) break;
00793         dir = dj->dir;                  /* Ptr to the directory entry of current index */
00794         c = dir[DIR_Name];
00795         if (c == 0) { res = FR_NO_FILE; break; }    /* Reached to end of table */
00796         a = dir[DIR_Attr] & AM_MASK;
00797 #if _USE_LFN    /* LFN configuration */
00798         if (c == 0xE5 || c == '.' || ((a & AM_VOL) && a != AM_LFN)) {   /* An entry without valid data */
00799             ord = 0xFF;
00800         } else {
00801             if (a == AM_LFN) {          /* An LFN entry is found */
00802                 if (dj->lfn) {
00803                     if (c & 0x40) {     /* Is it start of LFN sequence? */
00804                         sum = dir[LDIR_Chksum];
00805                         c &= 0xBF; ord = c;     /* LFN start order */
00806                         dj->lfn_idx = dj->index;
00807                     }
00808                     /* Check LFN validity. Compare LFN if it is out of 8.3 format */
00809                     ord = (c == ord && sum == dir[LDIR_Chksum] && (!lfen || test_lfn(dj->lfn, dir))) ? ord - 1 : 0xFF;
00810                 }
00811             } else {                    /* An SFN entry is found */
00812                 if (ord || sum != sum_sfn(dir)) {   /* Did not LFN match? */
00813                     dj->lfn_idx = 0xFFFF;
00814                     ord = 0xFF;
00815                 }
00816                 if (lfen) {             /* Match LFN if it is out of 8.3 format */
00817                     if (ord == 0) break;
00818                 } else {                /* Match SFN if LFN is in 8.3 format */
00819                     if (!mem_cmp(dir, dj->fn, 11)) break;
00820                 }
00821             }
00822         }
00823 #else   /* Non LFN configuration */
00824         if (c != 0xE5 && c != '.' && !(a & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
00825             break;
00826 #endif
00827         res = dir_next(dj, FALSE);              /* Next entry */
00828     } while (res == FR_OK);
00829 
00830     return res;
00831 }
00832 
00833 
00834 
00835 
00836 /*-----------------------------------------------------------------------*/
00837 /* Read an object from the directory                                     */
00838 /*-----------------------------------------------------------------------*/
00839 #if _FS_MINIMIZE <= 2
00840 static
00841 FRESULT dir_read (
00842     DIR *dj         /* Pointer to the directory object to store read object name */
00843 )
00844 {
00845     FRESULT res;
00846     BYTE a, c, ord, sum, *dir;
00847 
00848 
00849     ord = sum = 0xFF;
00850     res = FR_NO_FILE;
00851     while (dj->sect) {
00852         res = move_window(dj->fs, dj->sect);
00853         if (res != FR_OK) break;
00854         dir = dj->dir;                  /* Ptr to the directory entry of current index */
00855         c = dir[DIR_Name];
00856         if (c == 0) { res = FR_NO_FILE; break; }    /* Reached to end of table */
00857         a = dir[DIR_Attr] & AM_MASK;
00858 #if _USE_LFN    /* LFN configuration */
00859         if (c == 0xE5 || c == '.' || ((a & AM_VOL) && a != AM_LFN)) {   /* An entry without valid data */
00860             ord = 0xFF;
00861         } else {
00862             if (a == AM_LFN) {          /* An LFN entry is found */
00863                 if (c & 0x40) {         /* Is it start of LFN sequence? */
00864                     sum = dir[LDIR_Chksum];
00865                     c &= 0xBF; ord = c;
00866                     dj->lfn_idx = dj->index;
00867                 }
00868                 /* Check LFN validity and capture it */
00869                 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
00870             } else {                    /* An SFN entry is found */
00871                 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN entry? */
00872                     dj->lfn_idx = 0xFFFF;       /* No LFN. */
00873                 break;
00874             }
00875         }
00876 #else   /* Non LFN configuration */
00877         if (c != 0xE5 && c != '.' && !(a & AM_VOL)) /* Is it a valid entry? */
00878             break;
00879 #endif
00880         res = dir_next(dj, FALSE);              /* Next entry */
00881         if (res != FR_OK) break;
00882     }
00883 
00884     if (res != FR_OK) dj->sect = 0;
00885 
00886     return res;
00887 }
00888 #endif
00889 
00890 
00891 
00892 /*-----------------------------------------------------------------------*/
00893 /* Register an object to the directory                                   */
00894 /*-----------------------------------------------------------------------*/
00895 #if !_FS_READONLY
00896 static
00897 FRESULT dir_register (  /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
00898     DIR *dj             /* Target directory with object name to be created */
00899 )
00900 {
00901     FRESULT res;
00902     BYTE c, *dir;
00903 
00904 #if _USE_LFN    /* LFN configuration */
00905     WORD n, ne, is;
00906     BYTE sn[12], *fn, sum;
00907     WCHAR *lfn;
00908 
00909     fn = dj->fn; lfn = dj->lfn;
00910     mem_cpy(sn, fn, 12);
00911     if (sn[11] & 1) {       /* When LFN is out of 8.3 format, generate a numbered name */
00912         fn[11] = 0; dj->lfn = NULL;         /* Find only SFN */
00913         for (n = 1; n < 100; n++) {
00914             gen_numname(fn, sn, lfn, n);    /* Generate a numbered name */
00915             res = dir_find(dj);             /* Check if the name collides with existing SFN */
00916             if (res != FR_OK) break;
00917         }
00918         if (n == 100) return FR_DENIED;     /* Abort if too many collisions */
00919         if (res != FR_NO_FILE) return res;  /* Abort if the result is other than 'not collided' */
00920         fn[11] = sn[11]; dj->lfn = lfn;
00921     }
00922     if (sn[11] & 2) {       /* When eliminate LFN, reserve only an SFN entry. */
00923         ne = 1;
00924     } else {                /* Otherwise reserve an SFN + LFN entries. */
00925         for (ne = 0; lfn[ne]; ne++) ;
00926         ne = (ne + 25) / 13;
00927     }
00928 
00929     /* Reserve contiguous entries */
00930     res = dir_seek(dj, 0);
00931     if (res != FR_OK) return res;
00932     n = is = 0;
00933     do {
00934         res = move_window(dj->fs, dj->sect);
00935         if (res != FR_OK) break;
00936         c = *dj->dir;   /* Check the entry status */
00937         if (c == 0xE5 || c == 0) {  /* Is it a blank entry? */
00938             if (n == 0) is = dj->index; /* First index of the contigulus entry */
00939             if (++n == ne) break;   /* A contiguous entry that requiered count is found */
00940         } else {
00941             n = 0;                  /* Not a blank entry. Restart to search */
00942         }
00943         res = dir_next(dj, TRUE);   /* Next entry with table streach */
00944     } while (res == FR_OK);
00945 
00946     if (res == FR_OK && ne > 1) {   /* Initialize LFN entry if needed */
00947         res = dir_seek(dj, is);
00948         if (res == FR_OK) {
00949             sum = sum_sfn(dj->fn);  /* Sum of the SFN tied to the LFN */
00950             ne--;
00951             do {                    /* Store LFN entries in bottom first */
00952                 res = move_window(dj->fs, dj->sect);
00953                 if (res != FR_OK) break;
00954                 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
00955                 dj->fs->wflag = 1;
00956                 res = dir_next(dj, FALSE);  /* Next entry */
00957             } while (res == FR_OK && --ne);
00958         }
00959     }
00960 
00961 #else   /* Non LFN configuration */
00962     res = dir_seek(dj, 0);
00963     if (res == FR_OK) {
00964         do {    /* Find a blank entry for the SFN */
00965             res = move_window(dj->fs, dj->sect);
00966             if (res != FR_OK) break;
00967             c = *dj->dir;
00968             if (c == 0xE5 || c == 0) break; /* Is it a blank entry? */
00969             res = dir_next(dj, TRUE);       /* Next entry with table streach */
00970         } while (res == FR_OK);
00971     }
00972 #endif
00973 
00974     if (res == FR_OK) {     /* Initialize the SFN entry */
00975         res = move_window(dj->fs, dj->sect);
00976         if (res == FR_OK) {
00977             dir = dj->dir;
00978             mem_set(dir, 0, 32);            /* Clean the entry */
00979             mem_cpy(dir, dj->fn, 11);   /* Put SFN */
00980             dir[DIR_NTres] = *(dj->fn+11) & 0x18;   /* Put NT flag */
00981             dj->fs->wflag = 1;
00982         }
00983     }
00984 
00985     return res;
00986 }
00987 #endif /* !_FS_READONLY */
00988 
00989 
00990 
00991 
00992 /*-----------------------------------------------------------------------*/
00993 /* Remove an object from the directory                                   */
00994 /*-----------------------------------------------------------------------*/
00995 #if !_FS_READONLY && !_FS_MINIMIZE
00996 static
00997 FRESULT dir_remove (    /* FR_OK: Successful, FR_DISK_ERR: A disk error */
00998     DIR *dj             /* Directory object pointing the entry to be removed */
00999 )
01000 {
01001     FRESULT res;
01002 
01003 #if _USE_LFN    /* LFN configuration */
01004     WORD i;
01005 
01006     i = dj->index;  /* SFN index */
01007     res = dir_seek(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx));  /* Goto the SFN or top of the LFN entries */
01008     if (res == FR_OK) {
01009         do {
01010             res = move_window(dj->fs, dj->sect);
01011             if (res != FR_OK) break;
01012             *dj->dir = 0xE5;                /* Mark the entry "deleted" */
01013             dj->fs->wflag = 1;
01014             if (dj->index >= i) break;      /* When SFN is deleted, all entries of the object is deleted. */
01015             res = dir_next(dj, FALSE);      /* Next entry */
01016         } while (res == FR_OK);
01017         if (res == FR_NO_FILE) res = FR_INT_ERR;
01018     }
01019 
01020 #else           /* Non LFN configuration */
01021     res = dir_seek(dj, dj->index);
01022     if (res == FR_OK) {
01023         res = move_window(dj->fs, dj->sect);
01024         if (res == FR_OK) {
01025             *dj->dir = 0xE5;                /* Mark the entry "deleted" */
01026             dj->fs->wflag = 1;
01027         }
01028     }
01029 #endif
01030 
01031     return res;
01032 }
01033 #endif /* !_FS_READONLY */
01034 
01035 
01036 
01037 
01038 /*-----------------------------------------------------------------------*/
01039 /* Pick a segment and create the object name in directory form           */
01040 /*-----------------------------------------------------------------------*/
01041 
01042 static
01043 FRESULT create_name (
01044     DIR *dj,            /* Pointer to the directory object */
01045     const char **path   /* Pointer to pointer to the segment in the path string */
01046 )
01047 {
01048 #if _USE_LFN
01049     BYTE c, b, cf, *sfn;
01050     WCHAR w, *lfn;
01051     int i, ni, si, di;
01052     const char *p;
01053 
01054     /* Create LFN in Unicode */
01055     si = di = 0;
01056     p = *path;
01057     lfn = dj->lfn;
01058     for (;;) {
01059         w = (BYTE)p[si++];              /* Get a character */
01060         if (w < ' ' || w == '/' || w == '\\') break;    /* Break on end of segment */
01061         if (IsDBCS1(w)) {               /* If it is DBC 1st byte */
01062             c = p[si++];                /* Get 2nd byte */
01063             if (!IsDBCS2(c))            /* Reject invalid DBC */
01064                 return FR_INVALID_NAME;
01065             w = (w << 8) + c;
01066         } else {
01067             if (chk_chr("\"*:<>\?|\x7F", w))    /* Reject unallowable chars for LFN */
01068                 return FR_INVALID_NAME;
01069         }
01070         w = ff_convert(w, 1);           /* Convert OEM to Unicode, store it */
01071         if (!w || di >= _MAX_LFN)       /* Reject invalid code or too long name */
01072             return FR_INVALID_NAME;
01073         lfn[di++] = w;
01074     }
01075     *path = &p[si];                     /* Rerurn pointer to the next segment */
01076     cf = (w < ' ') ? 4 : 0;             /* Set last segment flag if end of path */
01077 
01078     while (di) {                        /* Strip trailing spaces and dots */
01079         w = lfn[di - 1];
01080         if (w != ' ' && w != '.') break;
01081         di--;
01082     }
01083     if (!di) return FR_INVALID_NAME;    /* Reject null string */
01084 
01085     lfn[di] = 0;                        /* LFN is created */
01086 
01087     /* Create SFN in directory form */
01088     sfn = dj->fn;
01089     mem_set(sfn, ' ', 11);
01090     for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ;  /* Strip leading spaces and dots */
01091     if (si) cf |= 1;
01092     while (di && lfn[di - 1] != '.') di--;  /* Find extension (di<=si: no extension) */
01093 
01094     b = i = 0; ni = 8;
01095     for (;;) {
01096         w = lfn[si++];                  /* Get an LFN char */
01097         if (w == 0) break;              /* Break when enf of the LFN */
01098         if (w == ' ' || (w == '.' && si != di)) {   /* Remove spaces and dots */
01099             cf |= 1; continue;
01100         }
01101         if (i >= ni || si == di) {      /* Here is extension or end of SFN */
01102             if (ni == 11) {             /* Extension is longer than 3 bytes */
01103                 cf |= 1; break;
01104             }
01105             if (si != di) cf |= 1;      /* File name is longer than 8 bytes */
01106             if (si > di) break;         /* No extension */
01107             si = di; i = 8; ni = 11;    /* Enter extension section */
01108             b <<= 2; continue;
01109         }
01110         w = ff_convert(w, 0);           /* Unicode -> OEM code */
01111         if (w >= 0x80) cf |= 0x20;      /* If there is any extended char, force create an LFN */
01112         if (w >= 0x100) {               /* Double byte char */
01113             if (i >= ni - 1) {
01114                 cf |= 1; i = ni; continue;
01115             }
01116             sfn[i++] = (BYTE)(w >> 8);
01117         } else {                        /* Single byte char */
01118             if (chk_chr("+,;[=]", w)) { /* Replace unallowable chars for SFN */
01119                 w = '_'; cf |= 1;
01120             } else {
01121                 if (IsUpper(w)) {       /* Large capital */
01122                     b |= 2;
01123                 } else {
01124                     if (IsLower(w)) {   /* Small capital */
01125                         b |= 1; w -= 0x20;
01126                     }
01127                 }
01128             }
01129         }
01130         sfn[i++] = (BYTE)w;
01131     }
01132     if (sfn[0] == 0xE5) sfn[0] = 0x05;  /* When first char collides with 0xE5, replace it with 0x05 */
01133 
01134     if (ni == 8) b <<= 2;
01135     if ((cf & 0x21) == 0) { /* When LFN is in 8.3 format without extended char, NT flags are created */
01136         if ((b & 0x03) == 0x01) cf |= 0x10; /* NT flag (Extension has only small capital) */
01137         if ((b & 0x0C) == 0x04) cf |= 0x08; /* NT flag (Filename has only small capital) */
01138         if ((b & 0x0C) != 0x0C && (b & 0x03) != 0x03) cf |= 2;  /* Eliminate LFN when non composite capitals */
01139     }
01140 
01141     sfn[11] = cf;       /* SFN is created */
01142 
01143 #else
01144     BYTE c, d, b, *sfn;
01145     int ni, si, i;
01146     const char *p;
01147 
01148     /* Create file name in directory form */
01149     sfn = dj->fn;
01150     mem_set(sfn, ' ', 11);
01151     si = i = b = 0; ni = 8;
01152     p = *path;
01153     for (;;) {
01154         c = p[si++];
01155         if (c < ' ' || c == '/' || c == '\\') break;    /* Break on end of segment */
01156         if (c == '.' || i >= ni) {
01157             if (ni != 8 || c != '.') return FR_INVALID_NAME;
01158             i = 8; ni = 11;
01159             b <<= 2; continue;
01160         }
01161         if (c >= 0x80) b |= 3;          /* If there is any extended char, eliminate NT flag */
01162         if (IsDBCS1(c)) {               /* If it is DBC 1st byte */
01163             d = p[si++];                /* Get 2nd byte */
01164             if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
01165                 return FR_INVALID_NAME;
01166             sfn[i++] = c;
01167             sfn[i++] = d;
01168         } else {
01169             if (chk_chr(" +,;[=]\"*:<>\?|\x7F", c)) /* Reject unallowable chrs for SFN */
01170                 return FR_INVALID_NAME;
01171             if (IsUpper(c)) {
01172                 b |= 2;
01173             } else {
01174                 if (IsLower(c)) {
01175                     b |= 1; c -= 0x20;
01176                 }
01177             }
01178             sfn[i++] = c;
01179         }
01180     }
01181     *path = &p[si];                     /* Rerurn pointer to the next segment */
01182     c = (c < ' ') ? 4 : 0;              /* Set last segment flag if end of path */
01183 
01184     if (!i) return FR_INVALID_NAME;     /* Reject null string */
01185     if (sfn[0] == 0xE5) sfn[0] = 0x05;  /* When first char collides with 0xE5, replace it with 0x05 */
01186 
01187     if (ni == 8) b <<= 2;
01188     if ((b & 0x03) == 0x01) c |= 0x10;  /* NT flag (Extension has only small capital) */
01189     if ((b & 0x0C) == 0x04) c |= 0x08;  /* NT flag (Filename has only small capital) */
01190 
01191     sfn[11] = c;        /* Store NT flag, File name is created */
01192 #endif
01193 
01194     return FR_OK;
01195 }
01196 
01197 
01198 
01199 
01200 /*-----------------------------------------------------------------------*/
01201 /* Get file information from directory entry                             */
01202 /*-----------------------------------------------------------------------*/
01203 #if _FS_MINIMIZE <= 1
01204 static
01205 void get_fileinfo (     /* No return code */
01206     DIR *dj,            /* Pointer to the directory object */
01207     FILINFO *fno        /* Pointer to store the file information */
01208 )
01209 {
01210     int i;
01211     BYTE c, nt, *dir;
01212     char *p;
01213 
01214 
01215     p = fno->fname;
01216     if (dj->sect) {
01217         dir = dj->dir;
01218         nt = dir[DIR_NTres];        /* NT flag */
01219         for (i = 0; i < 8; i++) {   /* Copy file name body */
01220             c = dir[i];
01221             if (c == ' ') break;
01222             if (c == 0x05) c = 0xE5;
01223             if ((nt & 0x08) && IsUpper(c)) c += 0x20;
01224             *p++ = c;
01225         }
01226         if (dir[8] != ' ') {        /* Copy file name extension */
01227             *p++ = '.';
01228             for (i = 8; i < 11; i++) {
01229                 c = dir[i];
01230                 if (c == ' ') break;
01231                 if ((nt & 0x10) && IsUpper(c)) c += 0x20;
01232                 *p++ = c;
01233             }
01234         }
01235         fno->fattrib = dir[DIR_Attr];               /* Attribute */
01236         fno->fsize = LD_DWORD(dir+DIR_FileSize);    /* Size */
01237         fno->fdate = LD_WORD(dir+DIR_WrtDate);      /* Date */
01238         fno->ftime = LD_WORD(dir+DIR_WrtTime);      /* Time */
01239     }
01240     *p = 0;
01241 
01242 #if _USE_LFN
01243     p = fno->lfname;
01244     if (p) {
01245         WCHAR wchr, *lfn;
01246 
01247         i = 0;
01248         if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
01249             lfn = dj->lfn;
01250             while ((wchr = *lfn++) != 0) {      /* Get an LFN char */
01251                 wchr = ff_convert(wchr, 0);     /* Unicode -> OEM code */
01252                 if (!wchr) { i = 0; break; }    /* Conversion error, no LFN */
01253                 if (_DF1S && wchr >= 0x100)     /* Put 1st byte if it is a DBC */
01254                     p[i++] = (char)(wchr >> 8);
01255                 p[i++] = (char)wchr;
01256                 if (i >= fno->lfsize) { i = 0; break; } /* Buffer overrun, no LFN */
01257             }
01258         }
01259         p[i] = 0;   /* Terminator */
01260     }
01261 #endif
01262 }
01263 #endif /* _FS_MINIMIZE <= 1 */
01264 
01265 
01266 
01267 
01268 /*-----------------------------------------------------------------------*/
01269 /* Follow a file path                                                    */
01270 /*-----------------------------------------------------------------------*/
01271 
01272 static
01273 FRESULT follow_path (   /* FR_OK(0): successful, !=0: error code */
01274     DIR *dj,            /* Directory object to return last directory and found object */
01275     const char *path    /* Full-path string to find a file or directory */
01276 )
01277 {
01278     FRESULT res;
01279     BYTE *dir, last;
01280 
01281 
01282     if (*path == '/' || *path == '\\' ) path++; /* Strip heading separator */
01283 
01284     dj->sclust =                        /* Set start directory (root dir) */
01285         (dj->fs->fs_type == FS_FAT32) ? dj->fs->dirbase : 0;
01286 
01287     if ((BYTE)*path < ' ') {            /* Null path means the root directory */
01288         res = dir_seek(dj, 0);
01289         dj->dir = NULL;
01290 
01291     } else {                            /* Follow path */
01292         for (;;) {
01293             res = create_name(dj, &path);   /* Get a segment */
01294             if (res != FR_OK) break;
01295             res = dir_find(dj);             /* Find it */
01296             last = *(dj->fn+11) & 4;
01297             if (res != FR_OK) {             /* Could not find the object */
01298                 if (res == FR_NO_FILE && !last)
01299                     res = FR_NO_PATH;
01300                 break;
01301             }
01302             if (last) break;                /* Last segment match. Function completed. */
01303             dir = dj->dir;                  /* There is next segment. Follow the sub directory */
01304             if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
01305                 res = FR_NO_PATH; break;
01306             }
01307             dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
01308         }
01309     }
01310 
01311     return res;
01312 }
01313 
01314 
01315 
01316 
01317 /*-----------------------------------------------------------------------*/
01318 /* Load boot record and check if it is an FAT boot record                */
01319 /*-----------------------------------------------------------------------*/
01320 
01321 static
01322 BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */
01323     FATFS *fs,  /* File system object */
01324     DWORD sect  /* Sector# (lba) to check if it is an FAT boot record or not */
01325 )
01326 {
01327     if (disk_read(fs->drive, fs->win, sect, 1) != RES_OK)   /* Load boot record */
01328         return 3;
01329     if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55)               /* Check record signature (always placed at offset 510 even if the sector size is >512) */
01330         return 2;
01331 
01332     if (!mem_cmp(&fs->win[BS_FilSysType], "FAT", 3))        /* Check FAT signature */
01333         return 0;
01334     if (!mem_cmp(&fs->win[BS_FilSysType32], "FAT32", 5) && !(fs->win[BPB_ExtFlags] & 0x80))
01335         return 0;
01336 
01337     return 1;
01338 }
01339 
01340 
01341 
01342 
01343 /*-----------------------------------------------------------------------*/
01344 /* Make sure that the file system is valid                               */
01345 /*-----------------------------------------------------------------------*/
01346 
01347 static
01348 FRESULT auto_mount (    /* FR_OK(0): successful, !=0: any error occured */
01349     const char **path,  /* Pointer to pointer to the path name (drive number) */
01350     FATFS **rfs,        /* Pointer to pointer to the found file system object */
01351     BYTE chk_wp         /* !=0: Check media write protection for write access */
01352 )
01353 {
01354     FRESULT res;
01355     BYTE vol, fmt, *tbl;
01356     DSTATUS stat;
01357     DWORD bsect, fsize, tsect, mclst;
01358     const char *p = *path;
01359     FATFS *fs;
01360 
01361 
01362     /* Get logical drive number from the path name */
01363     vol = p[0] - '0';           /* Is there a drive number? */
01364     if (vol <= 9 && p[1] == ':') {
01365         p += 2;                 /* Found a drive number, get and strip it */
01366         *path = p;              /* Return pointer to the path name */
01367     } else {
01368         vol = 0;                /* No drive number is given, use drive number 0 as default */
01369     }
01370 
01371     /* Check if the logical drive number is valid or not */
01372     if (vol >= _DRIVES) return FR_INVALID_DRIVE;    /* Is the drive number valid? */
01373     *rfs = fs = FatFs[vol];                 /* Returen pointer to the corresponding file system object */
01374     if (!fs) return FR_NOT_ENABLED;         /* Is the file system object registered? */
01375 
01376     ENTER_FF(fs);               /* Lock file system */
01377 
01378     if (fs->fs_type) {                      /* If the logical drive has been mounted */
01379         stat = disk_status(fs->drive);
01380         if (!(stat & STA_NOINIT)) {         /* and physical drive is kept initialized (has not been changed), */
01381 #if !_FS_READONLY
01382             if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
01383                 return FR_WRITE_PROTECTED;
01384 #endif
01385             return FR_OK;                   /* The file system object is valid */
01386         }
01387     }
01388 
01389     /* The logical drive must be re-mounted. Following code attempts to mount the volume */
01390 
01391     fs->fs_type = 0;                    /* Clear the file system object */
01392     fs->drive = LD2PD(vol);             /* Bind the logical drive and a physical drive */
01393     stat = disk_initialize(fs->drive);  /* Initialize low level disk I/O layer */
01394     if (stat & STA_NOINIT)              /* Check if the drive is ready */
01395         return FR_NOT_READY;
01396 #if _MAX_SS != 512                      /* Get disk sector size if needed */
01397     if (disk_ioctl(fs->drive, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
01398         return FR_NO_FILESYSTEM;
01399 #endif
01400 #if !_FS_READONLY
01401     if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
01402         return FR_WRITE_PROTECTED;
01403 #endif
01404     /* Search FAT partition on the drive */
01405     fmt = check_fs(fs, bsect = 0);      /* Check sector 0 as an SFD format */
01406     if (fmt == 1) {                     /* Not an FAT boot record, it may be patitioned */
01407         /* Check a partition listed in top of the partition table */
01408         tbl = &fs->win[MBR_Table + LD2PT(vol) * 16];    /* Partition table */
01409         if (tbl[4]) {                                   /* Is the partition existing? */
01410             bsect = LD_DWORD(&tbl[8]);                  /* Partition offset in LBA */
01411             fmt = check_fs(fs, bsect);                  /* Check the partition */
01412         }
01413     }
01414     if (fmt == 3) return FR_DISK_ERR;
01415     if (fmt || LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs))   /* No valid FAT patition is found */
01416         return FR_NO_FILESYSTEM;
01417 
01418     /* Initialize the file system object */
01419     fsize = LD_WORD(fs->win+BPB_FATSz16);               /* Number of sectors per FAT */
01420     if (!fsize) fsize = LD_DWORD(fs->win+BPB_FATSz32);
01421     fs->sects_fat = fsize;
01422     fs->n_fats = fs->win[BPB_NumFATs];                  /* Number of FAT copies */
01423     fsize *= fs->n_fats;                                /* (Number of sectors in FAT area) */
01424     fs->fatbase = bsect + LD_WORD(fs->win+BPB_RsvdSecCnt); /* FAT start sector (lba) */
01425     fs->csize = fs->win[BPB_SecPerClus];                /* Number of sectors per cluster */
01426     fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt);    /* Nmuber of root directory entries */
01427     tsect = LD_WORD(fs->win+BPB_TotSec16);              /* Number of sectors on the file system */
01428     if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
01429     fs->max_clust = mclst = (tsect                      /* Last cluster# + 1 */
01430         - LD_WORD(fs->win+BPB_RsvdSecCnt) - fsize - fs->n_rootdir / (SS(fs)/32)
01431         ) / fs->csize + 2;
01432 
01433     fmt = FS_FAT12;                                     /* Determine the FAT sub type */
01434     if (mclst >= 0xFF7) fmt = FS_FAT16;             /* Number of clusters >= 0xFF5 */
01435     if (mclst >= 0xFFF7) fmt = FS_FAT32;            /* Number of clusters >= 0xFFF5 */
01436 
01437     if (fmt == FS_FAT32)
01438         fs->dirbase = LD_DWORD(fs->win+BPB_RootClus);   /* Root directory start cluster */
01439     else
01440         fs->dirbase = fs->fatbase + fsize;              /* Root directory start sector (lba) */
01441     fs->database = fs->fatbase + fsize + fs->n_rootdir / (SS(fs)/32);   /* Data start sector (lba) */
01442 
01443 #if !_FS_READONLY
01444     /* Initialize allocation information */
01445     fs->free_clust = 0xFFFFFFFF;
01446     fs->wflag = 0;
01447     /* Get fsinfo if needed */
01448     if (fmt == FS_FAT32) {
01449         fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
01450         fs->fsi_flag = 0;
01451         if (disk_read(fs->drive, fs->win, fs->fsi_sector, 1) == RES_OK &&
01452             LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
01453             LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
01454             LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
01455             fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
01456             fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
01457         }
01458     }
01459 #endif
01460     fs->winsect = 0;
01461     fs->fs_type = fmt;          /* FAT syb-type */
01462     fs->id = ++Fsid;            /* File system mount ID */
01463     res = FR_OK;
01464 
01465     return res;
01466 }
01467 
01468 
01469 
01470 
01471 /*-----------------------------------------------------------------------*/
01472 /* Check if the file/dir object is valid or not                          */
01473 /*-----------------------------------------------------------------------*/
01474 
01475 static
01476 FRESULT validate (  /* FR_OK(0): The object is valid, !=0: Invalid */
01477     FATFS *fs,      /* Pointer to the file system object */
01478     WORD id         /* Member id of the target object to be checked */
01479 )
01480 {
01481     if (!fs || !fs->fs_type || fs->id != id)
01482         return FR_INVALID_OBJECT;
01483 
01484     ENTER_FF(fs);       /* Lock file system */
01485 
01486     if (disk_status(fs->drive) & STA_NOINIT)
01487         return FR_NOT_READY;
01488 
01489     return FR_OK;
01490 }
01491 
01492 
01493 
01494 
01495 /*--------------------------------------------------------------------------
01496 
01497    Public Functions
01498 
01499 --------------------------------------------------------------------------*/
01500 
01501 
01502 
01503 /*-----------------------------------------------------------------------*/
01504 /* Mount/Unmount a Locical Drive                                         */
01505 /*-----------------------------------------------------------------------*/
01506 
01507 FRESULT f_mount (
01508     BYTE vol,       /* Logical drive number to be mounted/unmounted */
01509     FATFS *fs       /* Pointer to new file system object (NULL for unmount)*/
01510 )
01511 {
01512     FATFS *rfs;
01513 
01514 
01515     if (vol >= _DRIVES)             /* Check if the drive number is valid */
01516         return FR_INVALID_DRIVE;
01517     rfs = FatFs[vol];               /* Get current state */
01518 
01519     if (rfs) {
01520 #if _FS_REENTRANT                   /* Discard sync object of the current volume */
01521         if (!ff_del_syncobj(fs->sobj)) return FR_INT_ERR;
01522 #endif
01523         rfs->fs_type = 0;           /* Clear old fs object */
01524     }
01525 
01526     if (fs) {
01527         fs->fs_type = 0;            /* Clear new fs object */
01528 #if _FS_REENTRANT                   /* Create sync object for the new volume */
01529         if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
01530 #endif
01531     }
01532     FatFs[vol] = fs;                /* Register new fs object */
01533 
01534     return FR_OK;
01535 }
01536 
01537 
01538 
01539 
01540 /*-----------------------------------------------------------------------*/
01541 /* Open or Create a File                                                 */
01542 /*-----------------------------------------------------------------------*/
01543 
01544 FRESULT f_open (
01545     FIL *fp,            /* Pointer to the blank file object */
01546     const char *path,   /* Pointer to the file name */
01547     BYTE mode           /* Access mode and file open mode flags */
01548 )
01549 {
01550     FRESULT res;
01551     DIR dj;
01552     NAMEBUF(sfn, lfn);
01553     BYTE *dir;
01554 
01555 
01556     fp->fs = NULL;      /* Clear file object */
01557 #if !_FS_READONLY
01558     mode &= (FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW);
01559     res = auto_mount(&path, &dj.fs, (BYTE)(mode & (FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)));
01560 #else
01561     mode &= FA_READ;
01562     res = auto_mount(&path, &dj.fs, 0);
01563 #endif
01564     if (res != FR_OK) LEAVE_FF(dj.fs, res);
01565     INITBUF(dj, sfn, lfn);
01566     res = follow_path(&dj, path);   /* Follow the file path */
01567 
01568 #if !_FS_READONLY
01569     /* Create or Open a file */
01570     if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
01571         DWORD ps, cl;
01572 
01573         if (res != FR_OK) {     /* No file, create new */
01574             if (res == FR_NO_FILE)
01575                 res = dir_register(&dj);
01576             if (res != FR_OK) LEAVE_FF(dj.fs, res);
01577             mode |= FA_CREATE_ALWAYS;
01578             dir = dj.dir;
01579         }
01580         else {                  /* Any object is already existing */
01581             if (mode & FA_CREATE_NEW)           /* Cannot create new */
01582                 LEAVE_FF(dj.fs, FR_EXIST);
01583             dir = dj.dir;
01584             if (!dir || (dir[DIR_Attr] & (AM_RDO | AM_DIR)))    /* Cannot overwrite it (R/O or DIR) */
01585                 LEAVE_FF(dj.fs, FR_DENIED);
01586             if (mode & FA_CREATE_ALWAYS) {      /* Resize it to zero if needed */
01587                 cl = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);    /* Get start cluster */
01588                 ST_WORD(dir+DIR_FstClusHI, 0);  /* cluster = 0 */
01589                 ST_WORD(dir+DIR_FstClusLO, 0);
01590                 ST_DWORD(dir+DIR_FileSize, 0);  /* size = 0 */
01591                 dj.fs->wflag = 1;
01592                 ps = dj.fs->winsect;            /* Remove the cluster chain */
01593                 if (cl) {
01594                     res = remove_chain(dj.fs, cl);
01595                     if (res) LEAVE_FF(dj.fs, res);
01596                     dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
01597                 }
01598                 res = move_window(dj.fs, ps);
01599                 if (res != FR_OK) LEAVE_FF(dj.fs, res);
01600             }
01601         }
01602         if (mode & FA_CREATE_ALWAYS) {
01603             dir[DIR_Attr] = 0;                  /* Reset attribute */
01604             ps = get_fattime();
01605             ST_DWORD(dir+DIR_CrtTime, ps);      /* Created time */
01606             dj.fs->wflag = 1;
01607             mode |= FA__WRITTEN;                /* Set file changed flag */
01608         }
01609     }
01610     /* Open an existing file */
01611     else {
01612 #endif /* !_FS_READONLY */
01613         if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
01614         dir = dj.dir;
01615         if (!dir || (dir[DIR_Attr] & AM_DIR))   /* It is a directory */
01616             LEAVE_FF(dj.fs, FR_NO_FILE);
01617 #if !_FS_READONLY
01618         if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
01619             LEAVE_FF(dj.fs, FR_DENIED);
01620     }
01621     fp->dir_sect = dj.fs->winsect;      /* Pointer to the directory entry */
01622     fp->dir_ptr = dj.dir;
01623 #endif
01624     fp->flag = mode;                    /* File access mode */
01625     fp->org_clust =                     /* File start cluster */
01626         ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
01627     fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
01628     fp->fptr = 0; fp->csect = 255;      /* File pointer */
01629     fp->dsect = 0;
01630     fp->fs = dj.fs; fp->id = dj.fs->id; /* Owner file system object of the file */
01631 
01632     LEAVE_FF(dj.fs, FR_OK);
01633 }
01634 
01635 
01636 
01637 
01638 /*-----------------------------------------------------------------------*/
01639 /* Read File                                                             */
01640 /*-----------------------------------------------------------------------*/
01641 
01642 FRESULT f_read (
01643     FIL *fp,        /* Pointer to the file object */
01644     void *buff,     /* Pointer to data buffer */
01645     UINT btr,       /* Number of bytes to read */
01646     UINT *br        /* Pointer to number of bytes read */
01647 )
01648 {
01649     FRESULT res;
01650     DWORD clst, sect, remain;
01651     UINT rcnt, cc;
01652     BYTE *rbuff = buff;
01653 
01654 
01655     *br = 0;
01656 
01657     res = validate(fp->fs, fp->id);                 /* Check validity of the object */
01658     if (res != FR_OK) LEAVE_FF(fp->fs, res);
01659     if (fp->flag & FA__ERROR)                       /* Check abort flag */
01660         LEAVE_FF(fp->fs, FR_INT_ERR);
01661     if (!(fp->flag & FA_READ))                      /* Check access mode */
01662         LEAVE_FF(fp->fs, FR_DENIED);
01663     remain = fp->fsize - fp->fptr;
01664     if (btr > remain) btr = (UINT)remain;           /* Truncate btr by remaining bytes */
01665 
01666     for ( ;  btr;                                   /* Repeat until all data transferred */
01667         rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
01668         if ((fp->fptr % SS(fp->fs)) == 0) {         /* On the sector boundary? */
01669             if (fp->csect >= fp->fs->csize) {       /* On the cluster boundary? */
01670                 clst = (fp->fptr == 0) ?            /* On the top of the file? */
01671                     fp->org_clust : get_cluster(fp->fs, fp->curr_clust);
01672                 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
01673                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
01674                 fp->curr_clust = clst;              /* Update current cluster */
01675                 fp->csect = 0;                      /* Reset sector offset in the cluster */
01676             }
01677             sect = clust2sect(fp->fs, fp->curr_clust);  /* Get current sector */
01678             if (!sect) ABORT(fp->fs, FR_INT_ERR);
01679             sect += fp->csect;
01680             cc = btr / SS(fp->fs);                  /* When remaining bytes >= sector size, */
01681             if (cc) {                               /* Read maximum contiguous sectors directly */
01682                 if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
01683                     cc = fp->fs->csize - fp->csect;
01684                 if (disk_read(fp->fs->drive, rbuff, sect, (BYTE)cc) != RES_OK)
01685                     ABORT(fp->fs, FR_DISK_ERR);
01686                 fp->csect += (BYTE)cc;              /* Next sector address in the cluster */
01687                 rcnt = SS(fp->fs) * cc;             /* Number of bytes transferred */
01688                 continue;
01689             }
01690 #if !_FS_TINY
01691 #if !_FS_READONLY
01692             if (fp->flag & FA__DIRTY) {         /* Write sector I/O buffer if needed */
01693                 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
01694                     ABORT(fp->fs, FR_DISK_ERR);
01695                 fp->flag &= (BYTE)~FA__DIRTY;
01696             }
01697 #endif
01698             if (fp->dsect != sect) {            /* Fill sector buffer with file data */
01699                 if (disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
01700                     ABORT(fp->fs, FR_DISK_ERR);
01701             }
01702 #endif
01703             fp->dsect = sect;
01704             fp->csect++;                            /* Next sector address in the cluster */
01705         }
01706         rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs));    /* Get partial sector data from sector buffer */
01707         if (rcnt > btr) rcnt = btr;
01708 #if _FS_TINY
01709         if (move_window(fp->fs, fp->dsect))         /* Move sector window */
01710             ABORT(fp->fs, FR_DISK_ERR);
01711         mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt);  /* Pick partial sector */
01712 #else
01713         mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt);  /* Pick partial sector */
01714 #endif
01715     }
01716 
01717 
01718     LEAVE_FF(fp->fs, FR_OK);
01719 }
01720 
01721 
01722 
01723 
01724 #if !_FS_READONLY
01725 /*-----------------------------------------------------------------------*/
01726 /* Write File                                                            */
01727 /*-----------------------------------------------------------------------*/
01728 
01729 FRESULT f_write (
01730     FIL *fp,            /* Pointer to the file object */
01731     const void *buff,   /* Pointer to the data to be written */
01732     UINT btw,           /* Number of bytes to write */
01733     UINT *bw            /* Pointer to number of bytes written */
01734 )
01735 {
01736     FRESULT res;
01737     DWORD clst, sect;
01738     UINT wcnt, cc;
01739     const BYTE *wbuff = buff;
01740 
01741 
01742     *bw = 0;
01743 
01744     res = validate(fp->fs, fp->id);                 /* Check validity of the object */
01745     if (res != FR_OK) LEAVE_FF(fp->fs, res);
01746     if (fp->flag & FA__ERROR)                       /* Check abort flag */
01747         LEAVE_FF(fp->fs, FR_INT_ERR);
01748     if (!(fp->flag & FA_WRITE))                     /* Check access mode */
01749         LEAVE_FF(fp->fs, FR_DENIED);
01750     if (fp->fsize + btw < fp->fsize) btw = 0;       /* File size cannot reach 4GB */
01751 
01752     for ( ;  btw;                                   /* Repeat until all data transferred */
01753         wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
01754         if ((fp->fptr % SS(fp->fs)) == 0) {         /* On the sector boundary? */
01755             if (fp->csect >= fp->fs->csize) {       /* On the cluster boundary? */
01756                 if (fp->fptr == 0) {                /* On the top of the file? */
01757                     clst = fp->org_clust;           /* Follow from the origin */
01758                     if (clst == 0)                  /* When there is no cluster chain, */
01759                         fp->org_clust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
01760                 } else {                            /* Middle or end of the file */
01761                     clst = create_chain(fp->fs, fp->curr_clust);            /* Follow or streach cluster chain */
01762                 }
01763                 if (clst == 0) break;               /* Could not allocate a new cluster (disk full) */
01764                 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
01765                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
01766                 fp->curr_clust = clst;              /* Update current cluster */
01767                 fp->csect = 0;                      /* Reset sector address in the cluster */
01768             }
01769 #if _FS_TINY
01770             if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write back data buffer prior to following direct transfer */
01771                 ABORT(fp->fs, FR_DISK_ERR);
01772 #else
01773             if (fp->flag & FA__DIRTY) {     /* Write back data buffer prior to following direct transfer */
01774                 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
01775                     ABORT(fp->fs, FR_DISK_ERR);
01776                 fp->flag &= (BYTE)~FA__DIRTY;
01777             }
01778 #endif
01779             sect = clust2sect(fp->fs, fp->curr_clust);  /* Get current sector */
01780             if (!sect) ABORT(fp->fs, FR_INT_ERR);
01781             sect += fp->csect;
01782             cc = btw / SS(fp->fs);                  /* When remaining bytes >= sector size, */
01783             if (cc) {                               /* Write maximum contiguous sectors directly */
01784                 if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
01785                     cc = fp->fs->csize - fp->csect;
01786                 if (disk_write(fp->fs->drive, wbuff, sect, (BYTE)cc) != RES_OK)
01787                     ABORT(fp->fs, FR_DISK_ERR);
01788 #if _FS_TINY
01789                 if (fp->fs->winsect - sect < cc) {  /* Refill sector cache if it gets dirty by the direct write */
01790                     mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
01791                     fp->fs->wflag = 0;
01792                 }
01793 #else
01794                 if (fp->dsect - sect < cc) {  /* Refill sector cache if it gets dirty by the direct write */
01795                     mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
01796                     fp->flag &= ~FA__DIRTY;
01797                 }
01798 #endif          
01799                 fp->csect += (BYTE)cc;              /* Next sector address in the cluster */
01800                 wcnt = SS(fp->fs) * cc;             /* Number of bytes transferred */
01801                 continue;
01802             }
01803 #if _FS_TINY
01804             if (fp->fptr >= fp->fsize) {            /* Avoid silly buffer filling at growing edge */
01805                 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
01806                 fp->fs->winsect = sect;
01807             }
01808 #else
01809             if (fp->dsect != sect) {                /* Fill sector buffer with file data */
01810                 if (fp->fptr < fp->fsize &&
01811                     disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
01812                         ABORT(fp->fs, FR_DISK_ERR);
01813             }
01814 #endif
01815             fp->dsect = sect;
01816             fp->csect++;                            /* Next sector address in the cluster */
01817         }
01818         wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs));    /* Put partial sector into file I/O buffer */
01819         if (wcnt > btw) wcnt = btw;
01820 #if _FS_TINY
01821         if (move_window(fp->fs, fp->dsect))         /* Move sector window */
01822             ABORT(fp->fs, FR_DISK_ERR);
01823         mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt);  /* Fit partial sector */
01824         fp->fs->wflag = 1;
01825 #else
01826         mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt);  /* Fit partial sector */
01827         fp->flag |= FA__DIRTY;
01828 #endif
01829     }
01830 
01831     if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
01832     fp->flag |= FA__WRITTEN;                        /* Set file changed flag */
01833 
01834     LEAVE_FF(fp->fs, FR_OK);
01835 }
01836 
01837 
01838 
01839 
01840 /*-----------------------------------------------------------------------*/
01841 /* Synchronize the File Object                                           */
01842 /*-----------------------------------------------------------------------*/
01843 
01844 FRESULT f_sync (
01845     FIL *fp     /* Pointer to the file object */
01846 )
01847 {
01848     FRESULT res;
01849     DWORD tim;
01850     BYTE *dir;
01851 
01852 
01853     res = validate(fp->fs, fp->id);     /* Check validity of the object */
01854     if (res == FR_OK) {
01855         if (fp->flag & FA__WRITTEN) {   /* Has the file been written? */
01856 #if !_FS_TINY   /* Write-back dirty buffer */
01857             if (fp->flag & FA__DIRTY) {
01858                 if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
01859                     LEAVE_FF(fp->fs, FR_DISK_ERR);
01860                 fp->flag &= (BYTE)~FA__DIRTY;
01861             }
01862 #endif
01863             /* Update the directory entry */
01864             res = move_window(fp->fs, fp->dir_sect);
01865             if (res == FR_OK) {
01866                 dir = fp->dir_ptr;
01867                 dir[DIR_Attr] |= AM_ARC;                    /* Set archive bit */
01868                 ST_DWORD(dir+DIR_FileSize, fp->fsize);      /* Update file size */
01869                 ST_WORD(dir+DIR_FstClusLO, fp->org_clust);  /* Update start cluster */
01870                 ST_WORD(dir+DIR_FstClusHI, fp->org_clust >> 16);
01871                 tim = get_fattime();                    /* Updated time */
01872                 ST_DWORD(dir+DIR_WrtTime, tim);
01873                 fp->flag &= (BYTE)~FA__WRITTEN;
01874                 fp->fs->wflag = 1;
01875                 res = sync(fp->fs);
01876             }
01877         }
01878     }
01879 
01880     LEAVE_FF(fp->fs, res);
01881 }
01882 
01883 #endif /* !_FS_READONLY */
01884 
01885 
01886 
01887 
01888 /*-----------------------------------------------------------------------*/
01889 /* Close File                                                            */
01890 /*-----------------------------------------------------------------------*/
01891 
01892 FRESULT f_close (
01893     FIL *fp     /* Pointer to the file object to be closed */
01894 )
01895 {
01896     FRESULT res;
01897 
01898 
01899 #if _FS_READONLY
01900     res = validate(fp->fs, fp->id);
01901     if (res == FR_OK) fp->fs = NULL;
01902     LEAVE_FF(fp->fs, res);
01903 #else
01904     res = f_sync(fp);
01905     if (res == FR_OK) fp->fs = NULL;
01906     return res;
01907 #endif
01908 }
01909 
01910 
01911 
01912 
01913 #if _FS_MINIMIZE <= 2
01914 /*-----------------------------------------------------------------------*/
01915 /* Seek File R/W Pointer                                                 */
01916 /*-----------------------------------------------------------------------*/
01917 
01918 FRESULT f_lseek (
01919     FIL *fp,        /* Pointer to the file object */
01920     DWORD ofs       /* File pointer from top of file */
01921 )
01922 {
01923     FRESULT res;
01924     DWORD clst, bcs, nsect, ifptr;
01925 
01926 
01927     res = validate(fp->fs, fp->id);     /* Check validity of the object */
01928     if (res != FR_OK) LEAVE_FF(fp->fs, res);
01929     if (fp->flag & FA__ERROR)           /* Check abort flag */
01930         LEAVE_FF(fp->fs, FR_INT_ERR);
01931     if (ofs > fp->fsize                 /* In read-only mode, clip offset with the file size */
01932 #if !_FS_READONLY
01933          && !(fp->flag & FA_WRITE)
01934 #endif
01935         ) ofs = fp->fsize;
01936 
01937     ifptr = fp->fptr;
01938     fp->fptr = 0; fp->csect = 255;
01939     nsect = 0;
01940     if (ofs > 0) {
01941         bcs = (DWORD)fp->fs->csize * SS(fp->fs);    /* Cluster size (byte) */
01942         if (ifptr > 0 &&
01943             (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
01944             fp->fptr = (ifptr - 1) & ~(bcs - 1);    /* start from the current cluster */
01945             ofs -= fp->fptr;
01946             clst = fp->curr_clust;
01947         } else {                                    /* When seek to back cluster, */
01948             clst = fp->org_clust;                   /* start from the first cluster */
01949 #if !_FS_READONLY
01950             if (clst == 0) {                        /* If no cluster chain, create a new chain */
01951                 clst = create_chain(fp->fs, 0);
01952                 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
01953                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
01954                 fp->org_clust = clst;
01955             }
01956 #endif
01957             fp->curr_clust = clst;
01958         }
01959         if (clst != 0) {
01960             while (ofs > bcs) {                     /* Cluster following loop */
01961 #if !_FS_READONLY
01962                 if (fp->flag & FA_WRITE) {          /* Check if in write mode or not */
01963                     clst = create_chain(fp->fs, clst);  /* Force streached if in write mode */
01964                     if (clst == 0) {                /* When disk gets full, clip file size */
01965                         ofs = bcs; break;
01966                     }
01967                 } else
01968 #endif
01969                     clst = get_cluster(fp->fs, clst);   /* Follow cluster chain if not in write mode */
01970                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
01971                 if (clst <= 1 || clst >= fp->fs->max_clust) ABORT(fp->fs, FR_INT_ERR);
01972                 fp->curr_clust = clst;
01973                 fp->fptr += bcs;
01974                 ofs -= bcs;
01975             }
01976             fp->fptr += ofs;
01977             fp->csect = (BYTE)(ofs / SS(fp->fs));   /* Sector offset in the cluster */
01978             if (ofs % SS(fp->fs)) {
01979                 nsect = clust2sect(fp->fs, clst);   /* Current sector */
01980                 if (!nsect) ABORT(fp->fs, FR_INT_ERR);
01981                 nsect += fp->csect;
01982                 fp->csect++;
01983             }
01984         }
01985     }
01986     if (nsect && nsect != fp->dsect && fp->fptr % SS(fp->fs)) {
01987 #if !_FS_TINY
01988 #if !_FS_READONLY
01989         if (fp->flag & FA__DIRTY) {         /* Write-back dirty buffer if needed */
01990             if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
01991                 ABORT(fp->fs, FR_DISK_ERR);
01992             fp->flag &= (BYTE)~FA__DIRTY;
01993         }
01994 #endif
01995         if (disk_read(fp->fs->drive, fp->buf, nsect, 1) != RES_OK)
01996             ABORT(fp->fs, FR_DISK_ERR);
01997 #endif
01998         fp->dsect = nsect;
01999     }
02000 #if !_FS_READONLY
02001     if (fp->fptr > fp->fsize) {         /* Set changed flag if the file size is extended */
02002         fp->fsize = fp->fptr;
02003         fp->flag |= FA__WRITTEN;
02004     }
02005 #endif
02006 
02007     LEAVE_FF(fp->fs, res);
02008 }
02009 
02010 
02011 
02012 
02013 #if _FS_MINIMIZE <= 1
02014 /*-----------------------------------------------------------------------*/
02015 /* Create a Directroy Object                                             */
02016 /*-----------------------------------------------------------------------*/
02017 
02018 FRESULT f_opendir (
02019     DIR *dj,            /* Pointer to directory object to create */
02020     const char *path    /* Pointer to the directory path */
02021 )
02022 {
02023     FRESULT res;
02024     NAMEBUF(sfn, lfn);
02025     BYTE *dir;
02026 
02027 
02028     res = auto_mount(&path, &dj->fs, 0);
02029     if (res == FR_OK) {
02030         INITBUF((*dj), sfn, lfn);
02031         res = follow_path(dj, path);            /* Follow the path to the directory */
02032         if (res == FR_OK) {                     /* Follow completed */
02033             dir = dj->dir;
02034             if (dir) {                          /* It is not the root dir */
02035                 if (dir[DIR_Attr] & AM_DIR) {   /* The object is a directory */
02036                     dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
02037                 } else {                        /* The object is not a directory */
02038                     res = FR_NO_PATH;
02039                 }
02040             } else {                            /* It is the root dir */
02041                 dj->sclust = (dj->fs->fs_type == FS_FAT32) ? dj->fs->dirbase : 0;
02042             }
02043             if (res == FR_OK) res = dir_seek(dj, 0);
02044             dj->id = dj->fs->id;
02045         } else {
02046             if (res == FR_NO_FILE) res = FR_NO_PATH;
02047         }
02048     }
02049 
02050     LEAVE_FF(dj->fs, res);
02051 }
02052 
02053 
02054 
02055 
02056 /*-----------------------------------------------------------------------*/
02057 /* Read Directory Entry in Sequense                                      */
02058 /*-----------------------------------------------------------------------*/
02059 
02060 FRESULT f_readdir (
02061     DIR *dj,            /* Pointer to the open directory object */
02062     FILINFO *fno        /* Pointer to file information to return */
02063 )
02064 {
02065     FRESULT res;
02066     NAMEBUF(sfn, lfn);
02067 
02068 
02069     res = validate(dj->fs, dj->id);         /* Check validity of the object */
02070     if (res == FR_OK) {
02071         INITBUF((*dj), sfn, lfn);
02072         if (!fno) {
02073             res = dir_seek(dj, 0);
02074         } else {
02075             res = dir_read(dj);
02076             if (res == FR_NO_FILE) {
02077                 dj->sect = 0;
02078                 res = FR_OK;
02079             }
02080             if (res == FR_OK) {             /* A valid entry is found */
02081                 get_fileinfo(dj, fno);      /* Get the object information */
02082                 res = dir_next(dj, FALSE);  /* Increment index for next */
02083                 if (res == FR_NO_FILE) {
02084                     dj->sect = 0;
02085                     res = FR_OK;
02086                 }
02087             }
02088         }
02089     }
02090 
02091     LEAVE_FF(dj->fs, res);
02092 }
02093 
02094 
02095 
02096 #if _FS_MINIMIZE == 0
02097 /*-----------------------------------------------------------------------*/
02098 /* Get File Status                                                       */
02099 /*-----------------------------------------------------------------------*/
02100 
02101 FRESULT f_stat (
02102     const char *path,   /* Pointer to the file path */
02103     FILINFO *fno        /* Pointer to file information to return */
02104 )
02105 {
02106     FRESULT res;
02107     DIR dj;
02108     NAMEBUF(sfn, lfn);
02109 
02110 
02111     res = auto_mount(&path, &dj.fs, 0);
02112     if (res == FR_OK) {
02113         INITBUF(dj, sfn, lfn);
02114         res = follow_path(&dj, path);   /* Follow the file path */
02115         if (res == FR_OK) {             /* Follwo completed */
02116             if (dj.dir) /* Found an object */
02117                 get_fileinfo(&dj, fno);
02118             else        /* It is root dir */
02119                 res = FR_INVALID_NAME;
02120         }
02121     }
02122 
02123     LEAVE_FF(dj.fs, res);
02124 }
02125 
02126 
02127 
02128 #if !_FS_READONLY
02129 /*-----------------------------------------------------------------------*/
02130 /* Truncate File                                                         */
02131 /*-----------------------------------------------------------------------*/
02132 
02133 FRESULT f_truncate (
02134     FIL *fp     /* Pointer to the file object */
02135 )
02136 {
02137     FRESULT res;
02138     DWORD ncl;
02139 
02140 
02141     res = validate(fp->fs, fp->id);     /* Check validity of the object */
02142     if (res != FR_OK) LEAVE_FF(fp->fs, res);
02143     if (fp->flag & FA__ERROR)           /* Check abort flag */
02144         LEAVE_FF(fp->fs, FR_INT_ERR);
02145     if (!(fp->flag & FA_WRITE))         /* Check access mode */
02146         LEAVE_FF(fp->fs, FR_DENIED);
02147 
02148     if (fp->fsize > fp->fptr) {
02149         fp->fsize = fp->fptr;   /* Set file size to current R/W point */
02150         fp->flag |= FA__WRITTEN;
02151         if (fp->fptr == 0) {    /* When set file size to zero, remove entire cluster chain */
02152             res = remove_chain(fp->fs, fp->org_clust);
02153             fp->org_clust = 0;
02154         } else {                /* When truncate a part of the file, remove remaining clusters */
02155             ncl = get_cluster(fp->fs, fp->curr_clust);
02156             res = FR_OK;
02157             if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
02158             if (ncl == 1) res = FR_INT_ERR;
02159             if (res == FR_OK && ncl < fp->fs->max_clust) {
02160                 res = put_cluster(fp->fs, fp->curr_clust, 0x0FFFFFFF);
02161                 if (res == FR_OK) res = remove_chain(fp->fs, ncl);
02162             }
02163         }
02164     }
02165     if (res != FR_OK) fp->flag |= FA__ERROR;
02166 
02167     LEAVE_FF(fp->fs, res);
02168 }
02169 
02170 
02171 
02172 
02173 /*-----------------------------------------------------------------------*/
02174 /* Get Number of Free Clusters                                           */
02175 /*-----------------------------------------------------------------------*/
02176 
02177 FRESULT f_getfree (
02178     const char *path,   /* Pointer to the logical drive number (root dir) */
02179     DWORD *nclst,       /* Pointer to the variable to return number of free clusters */
02180     FATFS **fatfs       /* Pointer to pointer to corresponding file system object to return */
02181 )
02182 {
02183     FRESULT res;
02184     DWORD n, clst, sect;
02185     BYTE fat, f, *p;
02186 
02187 
02188     /* Get drive number */
02189     res = auto_mount(&path, fatfs, 0);
02190     if (res != FR_OK) LEAVE_FF(*fatfs, res);
02191 
02192     /* If number of free cluster is valid, return it without cluster scan. */
02193     if ((*fatfs)->free_clust <= (*fatfs)->max_clust - 2) {
02194         *nclst = (*fatfs)->free_clust;
02195         LEAVE_FF(*fatfs, FR_OK);
02196     }
02197 
02198     /* Get number of free clusters */
02199     fat = (*fatfs)->fs_type;
02200     n = 0;
02201     if (fat == FS_FAT12) {
02202         clst = 2;
02203         do {
02204             if ((WORD)get_cluster(*fatfs, clst) == 0) n++;
02205         } while (++clst < (*fatfs)->max_clust);
02206     } else {
02207         clst = (*fatfs)->max_clust;
02208         sect = (*fatfs)->fatbase;
02209         f = 0; p = 0;
02210         do {
02211             if (!f) {
02212                 res = move_window(*fatfs, sect++);
02213                 if (res != FR_OK)
02214                     LEAVE_FF(*fatfs, res);
02215                 p = (*fatfs)->win;
02216             }
02217             if (fat == FS_FAT16) {
02218                 if (LD_WORD(p) == 0) n++;
02219                 p += 2; f += 1;
02220             } else {
02221                 if (LD_DWORD(p) == 0) n++;
02222                 p += 4; f += 2;
02223             }
02224         } while (--clst);
02225     }
02226     (*fatfs)->free_clust = n;
02227     if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1;
02228     *nclst = n;
02229 
02230     LEAVE_FF(*fatfs, FR_OK);
02231 }
02232 
02233 
02234 
02235 
02236 /*-----------------------------------------------------------------------*/
02237 /* Delete a File or Directory                                            */
02238 /*-----------------------------------------------------------------------*/
02239 
02240 FRESULT f_unlink (
02241     const char *path        /* Pointer to the file or directory path */
02242 )
02243 {
02244     FRESULT res;
02245     DIR dj, sdj;
02246     NAMEBUF(sfn, lfn);
02247     BYTE *dir;
02248     DWORD dclst;
02249 
02250 
02251     res = auto_mount(&path, &dj.fs, 1);
02252     if (res != FR_OK) LEAVE_FF(dj.fs, res);
02253 
02254     INITBUF(dj, sfn, lfn);
02255     res = follow_path(&dj, path);           /* Follow the file path */
02256     if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
02257 
02258     dir = dj.dir;
02259     if (!dir)                               /* Is it the root directory? */
02260         LEAVE_FF(dj.fs, FR_INVALID_NAME);
02261     if (dir[DIR_Attr] & AM_RDO)             /* Is it a R/O object? */
02262         LEAVE_FF(dj.fs, FR_DENIED);
02263     dclst = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
02264 
02265     if (dir[DIR_Attr] & AM_DIR) {           /* It is a sub-directory */
02266         if (dclst < 2) LEAVE_FF(dj.fs, FR_INT_ERR);
02267         mem_cpy(&sdj, &dj, sizeof(DIR));        /* Check if the sub-dir is empty or not */
02268         sdj.sclust = dclst;
02269         res = dir_seek(&sdj, 0);
02270         if (res != FR_OK) LEAVE_FF(dj.fs, res);
02271         res = dir_read(&sdj);
02272         if (res == FR_OK) res = FR_DENIED;  /* Not empty sub-dir */
02273         if (res != FR_NO_FILE) LEAVE_FF(dj.fs, res);
02274     }
02275 
02276     res = dir_remove(&dj);                  /* Remove directory entry */
02277     if (res == FR_OK) {
02278         if (dclst)
02279             res = remove_chain(dj.fs, dclst);   /* Remove the cluster chain */
02280         if (res == FR_OK) res = sync(dj.fs);
02281     }
02282 
02283     LEAVE_FF(dj.fs, res);
02284 }
02285 
02286 
02287 
02288 
02289 /*-----------------------------------------------------------------------*/
02290 /* Create a Directory                                                    */
02291 /*-----------------------------------------------------------------------*/
02292 
02293 FRESULT f_mkdir (
02294     const char *path        /* Pointer to the directory path */
02295 )
02296 {
02297     FRESULT res;
02298     DIR dj;
02299     NAMEBUF(sfn, lfn);
02300     BYTE *dir, n;
02301     DWORD dsect, dclst, pclst, tim;
02302 
02303 
02304     res = auto_mount(&path, &dj.fs, 1);
02305     if (res != FR_OK) LEAVE_FF(dj.fs, res);
02306 
02307     INITBUF(dj, sfn, lfn);
02308     res = follow_path(&dj, path);           /* Follow the file path */
02309     if (res == FR_OK) res = FR_EXIST;       /* Any file or directory is already existing */
02310     if (res != FR_NO_FILE)                  /* Any error occured */
02311         LEAVE_FF(dj.fs, res);
02312 
02313     dclst = create_chain(dj.fs, 0);         /* Allocate a new cluster for new directory table */
02314     res = FR_OK;
02315     if (dclst == 0) res = FR_DENIED;
02316     if (dclst == 1) res = FR_INT_ERR;
02317     if (dclst == 0xFFFFFFFF) res = FR_DISK_ERR;
02318     if (res == FR_OK)
02319         res = move_window(dj.fs, 0);
02320     if (res != FR_OK) LEAVE_FF(dj.fs, res);
02321     dsect = clust2sect(dj.fs, dclst);
02322 
02323     dir = dj.fs->win;                       /* Initialize the new directory table */
02324     mem_set(dir, 0, SS(dj.fs));
02325     mem_set(dir+DIR_Name, ' ', 8+3);        /* Create "." entry */
02326     dir[DIR_Name] = '.';
02327     dir[DIR_Attr] = AM_DIR;
02328     tim = get_fattime();
02329     ST_DWORD(dir+DIR_WrtTime, tim);
02330     ST_WORD(dir+DIR_FstClusLO, dclst);
02331     ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
02332     mem_cpy(dir+32, dir, 32);           /* Create ".." entry */
02333     dir[33] = '.';
02334     pclst = dj.sclust;
02335     if (dj.fs->fs_type == FS_FAT32 && pclst == dj.fs->dirbase)
02336         pclst = 0;
02337     ST_WORD(dir+32+DIR_FstClusLO, pclst);
02338     ST_WORD(dir+32+DIR_FstClusHI, pclst >> 16);
02339     for (n = 0; n < dj.fs->csize; n++) {    /* Write dot entries and clear left sectors */
02340         dj.fs->winsect = dsect++;
02341         dj.fs->wflag = 1;
02342         res = move_window(dj.fs, 0);
02343         if (res) LEAVE_FF(dj.fs, res);
02344         mem_set(dir, 0, SS(dj.fs));
02345     }
02346 
02347     res = dir_register(&dj);
02348     if (res != FR_OK) {
02349         remove_chain(dj.fs, dclst);
02350     } else {
02351         dir = dj.dir;
02352         dir[DIR_Attr] = AM_DIR;                 /* Attribute */
02353         ST_DWORD(dir+DIR_WrtTime, tim);         /* Crated time */
02354         ST_WORD(dir+DIR_FstClusLO, dclst);      /* Table start cluster */
02355         ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
02356         dj.fs->wflag = 1;
02357         res = sync(dj.fs);
02358     }
02359 
02360     LEAVE_FF(dj.fs, res);
02361 }
02362 
02363 
02364 
02365 
02366 /*-----------------------------------------------------------------------*/
02367 /* Change File Attribute                                                 */
02368 /*-----------------------------------------------------------------------*/
02369 
02370 FRESULT f_chmod (
02371     const char *path,   /* Pointer to the file path */
02372     BYTE value,         /* Attribute bits */
02373     BYTE mask           /* Attribute mask to change */
02374 )
02375 {
02376     FRESULT res;
02377     DIR dj;
02378     NAMEBUF(sfn, lfn);
02379     BYTE *dir;
02380 
02381 
02382     res = auto_mount(&path, &dj.fs, 1);
02383     if (res == FR_OK) {
02384         INITBUF(dj, sfn, lfn);
02385         res = follow_path(&dj, path);       /* Follow the file path */
02386         if (res == FR_OK) {
02387             dir = dj.dir;
02388             if (!dir) {                     /* Is it a root directory? */
02389                 res = FR_INVALID_NAME;
02390             } else {                        /* File or sub directory */
02391                 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC;    /* Valid attribute mask */
02392                 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
02393                 dj.fs->wflag = 1;
02394                 res = sync(dj.fs);
02395             }
02396         }
02397     }
02398 
02399     LEAVE_FF(dj.fs, res);
02400 }
02401 
02402 
02403 
02404 
02405 /*-----------------------------------------------------------------------*/
02406 /* Change Timestamp                                                      */
02407 /*-----------------------------------------------------------------------*/
02408 
02409 FRESULT f_utime (
02410     const char *path,   /* Pointer to the file/directory name */
02411     const FILINFO *fno  /* Pointer to the timestamp to be set */
02412 )
02413 {
02414     FRESULT res;
02415     DIR dj;
02416     NAMEBUF(sfn, lfn);
02417     BYTE *dir;
02418 
02419 
02420     res = auto_mount(&path, &dj.fs, 1);
02421     if (res == FR_OK) {
02422         INITBUF(dj, sfn, lfn);
02423         res = follow_path(&dj, path);   /* Follow the file path */
02424         if (res == FR_OK) {
02425             dir = dj.dir;
02426             if (!dir) {             /* Root directory */
02427                 res = FR_INVALID_NAME;
02428             } else {                /* File or sub-directory */
02429                 ST_WORD(dir+DIR_WrtTime, fno->ftime);
02430                 ST_WORD(dir+DIR_WrtDate, fno->fdate);
02431                 dj.fs->wflag = 1;
02432                 res = sync(dj.fs);
02433             }
02434         }
02435     }
02436 
02437     LEAVE_FF(dj.fs, res);
02438 }
02439 
02440 
02441 
02442 
02443 /*-----------------------------------------------------------------------*/
02444 /* Rename File/Directory                                                 */
02445 /*-----------------------------------------------------------------------*/
02446 
02447 FRESULT f_rename (
02448     const char *path_old,   /* Pointer to the old name */
02449     const char *path_new    /* Pointer to the new name */
02450 )
02451 {
02452     FRESULT res;
02453     DIR dj_old, dj_new;
02454     NAMEBUF(sfn, lfn);
02455     BYTE buf[21], *dir;
02456     DWORD dw;
02457 
02458 
02459     INITBUF(dj_old, sfn, lfn);
02460     res = auto_mount(&path_old, &dj_old.fs, 1);
02461     if (res == FR_OK) {
02462         dj_new.fs = dj_old.fs;
02463         res = follow_path(&dj_old, path_old);   /* Check old object */
02464     }
02465     if (res != FR_OK) LEAVE_FF(dj_old.fs, res); /* The old object is not found */
02466 
02467     if (!dj_old.dir) LEAVE_FF(dj_old.fs, FR_NO_FILE);   /* Is root dir? */
02468     mem_cpy(buf, dj_old.dir+DIR_Attr, 21);      /* Save the object information */
02469 
02470     mem_cpy(&dj_new, &dj_old, sizeof(DIR));
02471     res = follow_path(&dj_new, path_new);       /* Check new object */
02472     if (res == FR_OK) res = FR_EXIST;           /* The new object name is already existing */
02473     if (res == FR_NO_FILE) {                    /* Is it a valid path and no name collision? */
02474         res = dir_register(&dj_new);            /* Register the new object */
02475         if (res == FR_OK) {
02476             dir = dj_new.dir;                   /* Copy object information into new entry */
02477             mem_cpy(dir+13, buf+2, 19);
02478             dir[DIR_Attr] = buf[0];
02479             dj_old.fs->wflag = 1;
02480             if (dir[DIR_Attr] & AM_DIR) {       /* Update .. entry in the directory if needed */
02481                 dw = clust2sect(dj_new.fs, (DWORD)LD_WORD(dir+DIR_FstClusHI) | LD_WORD(dir+DIR_FstClusLO));
02482                 if (!dw) {
02483                     res = FR_INT_ERR;
02484                 } else {
02485                     res = move_window(dj_new.fs, dw);
02486                     dir = dj_new.fs->win+32;
02487                     if (res == FR_OK && dir[1] == '.') {
02488                         dw = (dj_new.fs->fs_type == FS_FAT32 && dj_new.sclust == dj_new.fs->dirbase) ? 0 : dj_new.sclust;
02489                         ST_WORD(dir+DIR_FstClusLO, dw);
02490                         ST_WORD(dir+DIR_FstClusHI, dw >> 16);
02491                         dj_new.fs->wflag = 1;
02492                     }
02493                 }
02494             }
02495             if (res == FR_OK) {
02496                 res = dir_remove(&dj_old);          /* Remove old entry */
02497                 if (res == FR_OK)
02498                     res = sync(dj_old.fs);
02499             }
02500         }
02501     }
02502 
02503     LEAVE_FF(dj_old.fs, res);
02504 }
02505 
02506 #endif /* !_FS_READONLY */
02507 #endif /* _FS_MINIMIZE == 0 */
02508 #endif /* _FS_MINIMIZE <= 1 */
02509 #endif /* _FS_MINIMIZE <= 2 */
02510 
02511 
02512 
02513 /*-----------------------------------------------------------------------*/
02514 /* Forward data to the stream directly (Available on only _FS_TINY cfg)  */
02515 /*-----------------------------------------------------------------------*/
02516 #if _USE_FORWARD && _FS_TINY
02517 
02518 FRESULT f_forward (
02519     FIL *fp,                        /* Pointer to the file object */
02520     UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
02521     UINT btr,                       /* Number of bytes to forward */
02522     UINT *bf                        /* Pointer to number of bytes forwarded */
02523 )
02524 {
02525     FRESULT res;
02526     DWORD remain, clst, sect;
02527     UINT rcnt;
02528 
02529 
02530     *bf = 0;
02531 
02532     res = validate(fp->fs, fp->id);                 /* Check validity of the object */
02533     if (res != FR_OK) LEAVE_FF(fp->fs, res);
02534     if (fp->flag & FA__ERROR)                       /* Check error flag */
02535         LEAVE_FF(fp->fs, FR_INT_ERR);
02536     if (!(fp->flag & FA_READ))                      /* Check access mode */
02537         LEAVE_FF(fp->fs, FR_DENIED);
02538 
02539     remain = fp->fsize - fp->fptr;
02540     if (btr > remain) btr = (UINT)remain;           /* Truncate btr by remaining bytes */
02541 
02542     for ( ;  btr && (*func)(NULL, 0);               /* Repeat until all data transferred or stream becomes busy */
02543         fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
02544         if ((fp->fptr % SS(fp->fs)) == 0) {         /* On the sector boundary? */
02545             if (fp->csect >= fp->fs->csize) {       /* On the cluster boundary? */
02546                 clst = (fp->fptr == 0) ?            /* On the top of the file? */
02547                     fp->org_clust : get_cluster(fp->fs, fp->curr_clust);
02548                 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
02549                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
02550                 fp->curr_clust = clst;              /* Update current cluster */
02551                 fp->csect = 0;                      /* Reset sector address in the cluster */
02552             }
02553             fp->csect++;                            /* Next sector address in the cluster */
02554         }
02555         sect = clust2sect(fp->fs, fp->curr_clust);  /* Get current data sector */
02556         if (!sect) ABORT(fp->fs, FR_INT_ERR);
02557         sect += fp->csect - 1;
02558         if (move_window(fp->fs, sect))              /* Move sector window */
02559             ABORT(fp->fs, FR_DISK_ERR);
02560         fp->dsect = sect;
02561         rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs));  /* Forward data from sector window */
02562         if (rcnt > btr) rcnt = btr;
02563         rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
02564         if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
02565     }
02566 
02567     LEAVE_FF(fp->fs, FR_OK);
02568 }
02569 #endif /* _USE_FORWARD */
02570 
02571 
02572 
02573 #if _USE_MKFS && !_FS_READONLY
02574 /*-----------------------------------------------------------------------*/
02575 /* Create File System on the Drive                                       */
02576 /*-----------------------------------------------------------------------*/
02577 #define N_ROOTDIR   512         /* Multiple of 32 and <= 2048 */
02578 #define N_FATS      1           /* 1 or 2 */
02579 #define MAX_SECTOR  131072000UL /* Maximum partition size */
02580 #define MIN_SECTOR  2000UL      /* Minimum partition size */
02581 
02582 
02583 FRESULT f_mkfs (
02584     BYTE drv,           /* Logical drive number */
02585     BYTE partition,     /* Partitioning rule 0:FDISK, 1:SFD */
02586     WORD allocsize      /* Allocation unit size [bytes] */
02587 )
02588 {
02589     static const DWORD sstbl[] = { 2048000, 1024000, 512000, 256000, 128000, 64000, 32000, 16000, 8000, 4000,   0 };
02590     static const WORD cstbl[] =  {   32768,   16384,   8192,   4096,   2048, 16384,  8192,  4096, 2048, 1024, 512 };
02591     BYTE fmt, m, *tbl;
02592     DWORD b_part, b_fat, b_dir, b_data;     /* Area offset (LBA) */
02593     DWORD n_part, n_rsv, n_fat, n_dir;      /* Area size */
02594     DWORD n_clst, n;
02595     WORD as;
02596     FATFS *fs;
02597     DSTATUS stat;
02598 
02599 
02600     /* Check validity of the parameters */
02601     if (drv >= _DRIVES) return FR_INVALID_DRIVE;
02602     if (partition >= 2) return FR_MKFS_ABORTED;
02603 
02604     /* Check mounted drive and clear work area */
02605     fs = FatFs[drv];
02606     if (!fs) return FR_NOT_ENABLED;
02607     fs->fs_type = 0;
02608     drv = LD2PD(drv);
02609 
02610     /* Get disk statics */
02611     stat = disk_initialize(drv);
02612     if (stat & STA_NOINIT) return FR_NOT_READY;
02613     if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
02614     if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_part) != RES_OK || n_part < MIN_SECTOR)
02615         return FR_MKFS_ABORTED;
02616     if (n_part > MAX_SECTOR) n_part = MAX_SECTOR;
02617     b_part = (!partition) ? 63 : 0;     /* Boot sector */
02618     n_part -= b_part;
02619 #if _MAX_SS == 512
02620     if (!allocsize) {                   /* Auto selection of cluster size */
02621         for (n = 0; n_part < sstbl[n]; n++) ;
02622         allocsize = cstbl[n];
02623     }
02624 #endif
02625     for (as = 512; as <= 32768U && as != allocsize; as <<= 1);
02626     if (as != allocsize) return FR_MKFS_ABORTED;
02627 #if _MAX_SS != 512                      /* Check disk sector size */
02628     if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
02629         || SS(fs) > _MAX_SS
02630         || SS(fs) > allocsize)
02631         return FR_MKFS_ABORTED;
02632 #endif
02633     allocsize /= SS(fs);        /* Number of sectors per cluster */
02634 
02635     /* Pre-compute number of clusters and FAT type */
02636     n_clst = n_part / allocsize;
02637     fmt = FS_FAT12;
02638     if (n_clst >= 0xFF5) fmt = FS_FAT16;
02639     if (n_clst >= 0xFFF5) fmt = FS_FAT32;
02640 
02641     /* Determine offset and size of FAT structure */
02642     switch (fmt) {
02643     case FS_FAT12:
02644         n_fat = ((n_clst * 3 + 1) / 2 + 3 + SS(fs) - 1) / SS(fs);
02645         n_rsv = 1 + partition;
02646         n_dir = N_ROOTDIR * 32 / SS(fs);
02647         break;
02648     case FS_FAT16:
02649         n_fat = ((n_clst * 2) + 4 + SS(fs) - 1) / SS(fs);
02650         n_rsv = 1 + partition;
02651         n_dir = N_ROOTDIR * 32 / SS(fs);
02652         break;
02653     default:
02654         n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
02655         n_rsv = 33 - partition;
02656         n_dir = 0;
02657     }
02658     b_fat = b_part + n_rsv;         /* FATs start sector */
02659     b_dir = b_fat + n_fat * N_FATS; /* Directory start sector */
02660     b_data = b_dir + n_dir;         /* Data start sector */
02661 
02662     /* Align data start sector to erase block boundary (for flash memory media) */
02663     if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK) return FR_MKFS_ABORTED;
02664     n = (b_data + n - 1) & ~(n - 1);
02665     n_fat += (n - b_data) / N_FATS;
02666     /* b_dir and b_data are no longer used below */
02667 
02668     /* Determine number of cluster and final check of validity of the FAT type */
02669     n_clst = (n_part - n_rsv - n_fat * N_FATS - n_dir) / allocsize;
02670     if (   (fmt == FS_FAT16 && n_clst < 0xFF5)
02671         || (fmt == FS_FAT32 && n_clst < 0xFFF5))
02672         return FR_MKFS_ABORTED;
02673 
02674     /* Create partition table if needed */
02675     if (!partition) {
02676         DWORD n_disk = b_part + n_part;
02677 
02678         tbl = fs->win+MBR_Table;
02679         ST_DWORD(tbl, 0x00010180);      /* Partition start in CHS */
02680         if (n_disk < 63UL * 255 * 1024) {   /* Partition end in CHS */
02681             n_disk = n_disk / 63 / 255;
02682             tbl[7] = (BYTE)n_disk;
02683             tbl[6] = (BYTE)((n_disk >> 2) | 63);
02684         } else {
02685             ST_WORD(&tbl[6], 0xFFFF);
02686         }
02687         tbl[5] = 254;
02688         if (fmt != FS_FAT32)            /* System ID */
02689             tbl[4] = (n_part < 0x10000) ? 0x04 : 0x06;
02690         else
02691             tbl[4] = 0x0c;
02692         ST_DWORD(tbl+8, 63);            /* Partition start in LBA */
02693         ST_DWORD(tbl+12, n_part);       /* Partition size in LBA */
02694         ST_WORD(tbl+64, 0xAA55);        /* Signature */
02695         if (disk_write(drv, fs->win, 0, 1) != RES_OK)
02696             return FR_DISK_ERR;
02697     }
02698 
02699     /* Create boot record */
02700     tbl = fs->win;                              /* Clear buffer */
02701     mem_set(tbl, 0, SS(fs));
02702     ST_DWORD(tbl+BS_jmpBoot, 0x90FEEB);         /* Boot code (jmp $, nop) */
02703     ST_WORD(tbl+BPB_BytsPerSec, SS(fs));        /* Sector size */
02704     tbl[BPB_SecPerClus] = (BYTE)allocsize;      /* Sectors per cluster */
02705     ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv);         /* Reserved sectors */
02706     tbl[BPB_NumFATs] = N_FATS;                  /* Number of FATs */
02707     ST_WORD(tbl+BPB_RootEntCnt, SS(fs) / 32 * n_dir); /* Number of rootdir entries */
02708     if (n_part < 0x10000) {                     /* Number of total sectors */
02709         ST_WORD(tbl+BPB_TotSec16, n_part);
02710     } else {
02711         ST_DWORD(tbl+BPB_TotSec32, n_part);
02712     }
02713     tbl[BPB_Media] = 0xF8;                      /* Media descripter */
02714     ST_WORD(tbl+BPB_SecPerTrk, 63);             /* Number of sectors per track */
02715     ST_WORD(tbl+BPB_NumHeads, 255);             /* Number of heads */
02716     ST_DWORD(tbl+BPB_HiddSec, b_part);          /* Hidden sectors */
02717     n = get_fattime();                          /* Use current time as a VSN */
02718     if (fmt != FS_FAT32) {
02719         ST_DWORD(tbl+BS_VolID, n);              /* Volume serial number */
02720         ST_WORD(tbl+BPB_FATSz16, n_fat);        /* Number of secters per FAT */
02721         tbl[BS_DrvNum] = 0x80;                  /* Drive number */
02722         tbl[BS_BootSig] = 0x29;                 /* Extended boot signature */
02723         mem_cpy(tbl+BS_VolLab, "NO NAME    FAT     ", 19);  /* Volume lavel, FAT signature */
02724     } else {
02725         ST_DWORD(tbl+BS_VolID32, n);            /* Volume serial number */
02726         ST_DWORD(tbl+BPB_FATSz32, n_fat);       /* Number of secters per FAT */
02727         ST_DWORD(tbl+BPB_RootClus, 2);          /* Root directory cluster (2) */
02728         ST_WORD(tbl+BPB_FSInfo, 1);             /* FSInfo record offset (bs+1) */
02729         ST_WORD(tbl+BPB_BkBootSec, 6);          /* Backup boot record offset (bs+6) */
02730         tbl[BS_DrvNum32] = 0x80;                /* Drive number */
02731         tbl[BS_BootSig32] = 0x29;               /* Extended boot signature */
02732         mem_cpy(tbl+BS_VolLab32, "NO NAME    FAT32   ", 19);    /* Volume lavel, FAT signature */
02733     }
02734     ST_WORD(tbl+BS_55AA, 0xAA55);               /* Signature */
02735     if (disk_write(drv, tbl, b_part+0, 1) != RES_OK)
02736         return FR_DISK_ERR;
02737     if (fmt == FS_FAT32)
02738         disk_write(drv, tbl, b_part+6, 1);
02739 
02740     /* Initialize FAT area */
02741     for (m = 0; m < N_FATS; m++) {
02742         mem_set(tbl, 0, SS(fs));        /* 1st sector of the FAT  */
02743         if (fmt != FS_FAT32) {
02744             n = (fmt == FS_FAT12) ? 0x00FFFFF8 : 0xFFFFFFF8;
02745             ST_DWORD(tbl, n);               /* Reserve cluster #0-1 (FAT12/16) */
02746         } else {
02747             ST_DWORD(tbl+0, 0xFFFFFFF8);    /* Reserve cluster #0-1 (FAT32) */
02748             ST_DWORD(tbl+4, 0xFFFFFFFF);
02749             ST_DWORD(tbl+8, 0x0FFFFFFF);    /* Reserve cluster #2 for root dir */
02750         }
02751         if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
02752             return FR_DISK_ERR;
02753         mem_set(tbl, 0, SS(fs));        /* Following FAT entries are filled by zero */
02754         for (n = 1; n < n_fat; n++) {
02755             if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
02756                 return FR_DISK_ERR;
02757         }
02758     }
02759 
02760     /* Initialize Root directory */
02761     m = (BYTE)((fmt == FS_FAT32) ? allocsize : n_dir);
02762     do {
02763         if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
02764             return FR_DISK_ERR;
02765     } while (--m);
02766 
02767     /* Create FSInfo record if needed */
02768     if (fmt == FS_FAT32) {
02769         ST_WORD(tbl+BS_55AA, 0xAA55);
02770         ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
02771         ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
02772         ST_DWORD(tbl+FSI_Free_Count, n_clst - 1);
02773         ST_DWORD(tbl+FSI_Nxt_Free, 0xFFFFFFFF);
02774         disk_write(drv, tbl, b_part+1, 1);
02775         disk_write(drv, tbl, b_part+7, 1);
02776     }
02777 
02778     return (disk_ioctl(drv, CTRL_SYNC, (void*)NULL) == RES_OK) ? FR_OK : FR_DISK_ERR;
02779 }
02780 
02781 #endif /* _USE_MKFS && !_FS_READONLY */
02782 
02783 
02784 
02785 
02786 #if _USE_STRFUNC
02787 /*-----------------------------------------------------------------------*/
02788 /* Get a string from the file                                            */
02789 /*-----------------------------------------------------------------------*/
02790 char* f_gets (
02791     char* buff, /* Pointer to the string buffer to read */
02792     int len,    /* Size of string buffer */
02793     FIL* fil    /* Pointer to the file object */
02794 )
02795 {
02796     int i = 0;
02797     char *p = buff;
02798     UINT rc;
02799 
02800 
02801     while (i < len - 1) {           /* Read bytes until buffer gets filled */
02802         f_read(fil, p, 1, &rc);
02803         if (rc != 1) break;         /* Break when no data to read */
02804 #if _USE_STRFUNC >= 2
02805         if (*p == '\r') continue;   /* Strip '\r' */
02806 #endif
02807         i++;
02808         if (*p++ == '\n') break;    /* Break when reached end of line */
02809     }
02810     *p = 0;
02811     return i ? buff : NULL;         /* When no data read (eof or error), return with error. */
02812 }
02813 
02814 
02815 
02816 #if !_FS_READONLY
02817 #include <stdarg.h>
02818 /*-----------------------------------------------------------------------*/
02819 /* Put a character to the file                                           */
02820 /*-----------------------------------------------------------------------*/
02821 int f_putc (
02822     int chr,    /* A character to be output */
02823     FIL* fil    /* Ponter to the file object */
02824 )
02825 {
02826     UINT bw;
02827     char c;
02828 
02829 
02830 #if _USE_STRFUNC >= 2
02831     if (chr == '\n') f_putc ('\r', fil);    /* LF -> CRLF conversion */
02832 #endif
02833     if (!fil) { /* Special value may be used to switch the destination to any other device */
02834     /*  put_console(chr);   */
02835         return chr;
02836     }
02837     c = (char)chr;
02838     f_write(fil, &c, 1, &bw);   /* Write a byte to the file */
02839     return bw ? chr : EOF;      /* Return the result */
02840 }
02841 
02842 
02843 
02844 
02845 /*-----------------------------------------------------------------------*/
02846 /* Put a string to the file                                              */
02847 /*-----------------------------------------------------------------------*/
02848 int f_puts (
02849     const char* str,    /* Pointer to the string to be output */
02850     FIL* fil            /* Pointer to the file object */
02851 )
02852 {
02853     int n;
02854 
02855 
02856     for (n = 0; *str; str++, n++) {
02857         if (f_putc(*str, fil) == EOF) return EOF;
02858     }
02859     return n;
02860 }
02861 
02862 
02863 
02864 
02865 /*-----------------------------------------------------------------------*/
02866 /* Put a formatted string to the file                                    */
02867 /*-----------------------------------------------------------------------*/
02868 int f_printf (
02869     FIL* fil,           /* Pointer to the file object */
02870     const char* str,    /* Pointer to the format string */
02871     ...                 /* Optional arguments... */
02872 )
02873 {
02874     va_list arp;
02875     UCHAR c, f, r;
02876     ULONG val;
02877     char s[16];
02878     int i, w, res, cc;
02879 
02880 
02881     va_start(arp, str);
02882 
02883     for (cc = res = 0; cc != EOF; res += cc) {
02884         c = *str++;
02885         if (c == 0) break;          /* End of string */
02886         if (c != '%') {             /* Non escape cahracter */
02887             cc = f_putc(c, fil);
02888             if (cc != EOF) cc = 1;
02889             continue;
02890         }
02891         w = f = 0;
02892         c = *str++;
02893         if (c == '0') {             /* Flag: '0' padding */
02894             f = 1; c = *str++;
02895         }
02896         while (c >= '0' && c <= '9') {  /* Precision */
02897             w = w * 10 + (c - '0');
02898             c = *str++;
02899         }
02900         if (c == 'l') {             /* Prefix: Size is long int */
02901             f |= 2; c = *str++;
02902         }
02903         if (c == 's') {             /* Type is string */
02904             cc = f_puts(va_arg(arp, char*), fil);
02905             continue;
02906         }
02907         if (c == 'c') {             /* Type is character */
02908             cc = f_putc(va_arg(arp, int), fil);
02909             if (cc != EOF) cc = 1;
02910             continue;
02911         }
02912         r = 0;
02913         if (c == 'd') r = 10;       /* Type is signed decimal */
02914         if (c == 'u') r = 10;       /* Type is unsigned decimal */
02915         if (c == 'X') r = 16;       /* Type is unsigned hexdecimal */
02916         if (r == 0) break;          /* Unknown type */
02917         if (f & 2) {                /* Get the value */
02918             val = (ULONG)va_arg(arp, long);
02919         } else {
02920             val = (c == 'd') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int);
02921         }
02922         /* Put numeral string */
02923         if (c == 'd') {
02924             if (val & 0x80000000) {
02925                 val = 0 - val;
02926                 f |= 4;
02927             }
02928         }
02929         i = sizeof(s) - 1; s[i] = 0;
02930         do {
02931             c = (UCHAR)(val % r + '0');
02932             if (c > '9') c += 7;
02933             s[--i] = c;
02934             val /= r;
02935         } while (i && val);
02936         if (i && (f & 4)) s[--i] = '-';
02937         w = sizeof(s) - 1 - w;
02938         while (i && i > w) s[--i] = (f & 1) ? '0' : ' ';
02939         cc = f_puts(&s[i], fil);
02940     }
02941 
02942     va_end(arp);
02943     return (cc == EOF) ? cc : res;
02944 }
02945 
02946 #endif /* !_FS_READONLY */
02947 #endif /* _USE_STRFUNC */