Tyler Weaver
updated chan_fatfs
Fork of
chan_fatfs
by 
Eli Hughes
Diff: chan_fs/ff.c
- Revision:
- 1:68378811b1e2
- Parent:
- 0:c1253c12d4bc
- Child:
- 2:e8cd708f09ff
--- a/chan_fs/ff.c Sun Feb 21 02:45:09 2010 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,3153 +0,0 @@
-/*----------------------------------------------------------------------------/
-/ FatFs - FAT file system module R0.07e (C)ChaN, 2009
-/-----------------------------------------------------------------------------/
-/ FatFs module is a generic FAT file system module for small embedded systems.
-/ This is a free software that opened for education, research and commercial
-/ developments under license policy of following trems.
-/
-/ Copyright (C) 2009, ChaN, all right reserved.
-/
-/ * The FatFs module is a free software and there is NO WARRANTY.
-/ * No restriction on use. You can use, modify and redistribute it for
-/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
-/ * Redistributions of source code must retain the above copyright notice.
-/
-/-----------------------------------------------------------------------------/
-/ Feb 26,'06 R0.00 Prototype.
-/
-/ Apr 29,'06 R0.01 First stable version.
-/
-/ Jun 01,'06 R0.02 Added FAT12 support.
-/ Removed unbuffered mode.
-/ Fixed a problem on small (<32M) patition.
-/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
-/
-/ Sep 22,'06 R0.03 Added f_rename().
-/ Changed option _FS_MINIMUM to _FS_MINIMIZE.
-/ Dec 11,'06 R0.03a Improved cluster scan algolithm to write files fast.
-/ Fixed f_mkdir() creates incorrect directory on FAT32.
-/
-/ Feb 04,'07 R0.04 Supported multiple drive system.
-/ Changed some interfaces for multiple drive system.
-/ Changed f_mountdrv() to f_mount().
-/ Added f_mkfs().
-/ Apr 01,'07 R0.04a Supported multiple partitions on a plysical drive.
-/ Added a capability of extending file size to f_lseek().
-/ Added minimization level 3.
-/ Fixed an endian sensitive code in f_mkfs().
-/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
-/ Added FSInfo support.
-/ Fixed DBCS name can result FR_INVALID_NAME.
-/ Fixed short seek (<= csize) collapses the file object.
-/
-/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
-/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
-/ Fixed f_mkdir() on FAT32 creates incorrect directory.
-/ Feb 03,'08 R0.05a Added f_truncate() and f_utime().
-/ Fixed off by one error at FAT sub-type determination.
-/ Fixed btr in f_read() can be mistruncated.
-/ Fixed cached sector is not flushed when create and close
-/ without write.
-/
-/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
-/ Improved performance of f_lseek() on moving to the same
-/ or following cluster.
-/
-/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a buffer configuration option.
-/ Added long file name support.
-/ Added multiple code page support.
-/ Added re-entrancy for multitask operation.
-/ Added auto cluster size selection to f_mkfs().
-/ Added rewind option to f_readdir().
-/ Changed result code of critical errors.
-/ Renamed string functions to avoid name collision.
-/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
-/ Added multiple sector size support.
-/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
-/ Fixed wrong cache control in f_lseek().
-/ Added relative path feature.
-/ Added f_chdir() and f_chdrive().
-/ Added proper case conversion to extended char.
-/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
-/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
-/ Fixed name matching error on the 13 char boundary.
-/ Added a configuration option, _LFN_UNICODE.
-/ Changed f_readdir() to return the SFN with always upper
-/ case on non-LFN cfg.
-/---------------------------------------------------------------------------*/
-
-#include "ff.h" /* FatFs configurations and declarations */
-#include "diskio.h" /* Declarations of low level disk I/O functions */
-
-/*--------------------------------------------------------------------------
-
- Module Private Definitions
-
----------------------------------------------------------------------------*/
-
-#if _FATFS != 0x007E
-#error Wrong include file (ff.h).
-#endif
-
-#if _FS_REENTRANT
-#if _USE_LFN == 1
-#error Static LFN work area must not be used in re-entrant configuration.
-#endif
-#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
-#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
-
-#else
-#define ENTER_FF(fs)
-#define LEAVE_FF(fs, res) return res
-
-#endif
-
-#define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
-
-#ifndef NULL
-#define NULL 0
-#endif
-
-/* Name status flags */
-#define NS 11 /* Offset of name status byte */
-#define NS_LOSS 0x01 /* Out of 8.3 format */
-#define NS_LFN 0x02 /* Force to create LFN entry */
-#define NS_LAST 0x04 /* Last segment */
-#define NS_BODY 0x08 /* Lower case flag (body) */
-#define NS_EXT 0x10 /* Lower case flag (ext) */
-#define NS_DOT 0x20 /* Dot entry */
-
-
-
-
-/*--------------------------------------------------------------------------
-
- Private Work Area
-
----------------------------------------------------------------------------*/
-
-#if _DRIVES < 1 || _DRIVES > 9
-#error Number of drives must be 1-9.
-#endif
-static
-FATFS *FatFs[_DRIVES]; /* Pointer to the file system objects (logical drives) */
-
-static
-WORD Fsid; /* File system mount ID */
-
-#if _FS_RPATH
-static
-BYTE Drive; /* Current drive */
-#endif
-
-
-#if _USE_LFN == 1 /* LFN with static LFN working buffer */
-static
-WCHAR LfnBuf[_MAX_LFN + 1];
-#define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR *lp = LfnBuf
-#define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp
-
-#elif _USE_LFN > 1 /* LFN with dynamic LFN working buffer */
-#define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR lbuf[_MAX_LFN + 1], *lp = lbuf
-#define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp
-
-#else /* No LFN */
-#define NAMEBUF(sp,lp) BYTE sp[12]
-#define INITBUF(dj,sp,lp) dj.fn = sp
-
-#endif
-
-
-
-
-/*--------------------------------------------------------------------------
-
- Module Private Functions
-
----------------------------------------------------------------------------*/
-
-
-/*-----------------------------------------------------------------------*/
-/* String functions */
-/*-----------------------------------------------------------------------*/
-
-/* Copy memory to memory */
-static
-void mem_cpy (void* dst, const void* src, int cnt) {
- char *d = (char*)dst;
- const char *s = (const char *)src;
- while (cnt--) *d++ = *s++;
-}
-
-/* Fill memory */
-static
-void mem_set (void* dst, int val, int cnt) {
- char *d = (char*)dst;
- while (cnt--) *d++ = (char)val;
-}
-
-/* Compare memory to memory */
-static
-int mem_cmp (const void* dst, const void* src, int cnt) {
- const char *d = (const char *)dst, *s = (const char *)src;
- int r = 0;
- while (cnt-- && (r = *d++ - *s++) == 0) ;
- return r;
-}
-
-/* Check if chr is contained in the string */
-static
-int chk_chr (const char* str, int chr) {
- while (*str && *str != chr) str++;
- return *str;
-}
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Request/Release grant to access the volume */
-/*-----------------------------------------------------------------------*/
-#if _FS_REENTRANT
-
-static
-BOOL lock_fs (
- FATFS *fs /* File system object */
-)
-{
- return ff_req_grant(fs->sobj);
-}
-
-
-static
-void unlock_fs (
- FATFS *fs, /* File system object */
- FRESULT res /* Result code to be returned */
-)
-{
- if (res != FR_NOT_ENABLED &&
- res != FR_INVALID_DRIVE &&
- res != FR_INVALID_OBJECT &&
- res != FR_TIMEOUT) {
- ff_rel_grant(fs->sobj);
- }
-}
-#endif
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Change window offset */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT move_window (
- FATFS *fs, /* File system object */
- DWORD sector /* Sector number to make apperance in the fs->win[] */
-) /* Move to zero only writes back dirty window */
-{
- DWORD wsect;
-
-
- wsect = fs->winsect;
- if (wsect != sector) { /* Changed current window */
-#if !_FS_READONLY
- if (fs->wflag) { /* Write back dirty window if needed */
- if (disk_write(fs->drive, fs->win, wsect, 1) != RES_OK)
- return FR_DISK_ERR;
- fs->wflag = 0;
- if (wsect < (fs->fatbase + fs->sects_fat)) { /* In FAT area */
- BYTE nf;
- for (nf = fs->n_fats; nf > 1; nf--) { /* Refrect the change to all FAT copies */
- wsect += fs->sects_fat;
- disk_write(fs->drive, fs->win, wsect, 1);
- }
- }
- }
-#endif
- if (sector) {
- if (disk_read(fs->drive, fs->win, sector, 1) != RES_OK)
- return FR_DISK_ERR;
- fs->winsect = sector;
- }
- }
-
- return FR_OK;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Clean-up cached data */
-/*-----------------------------------------------------------------------*/
-#if !_FS_READONLY
-static
-FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */
- FATFS *fs /* File system object */
-)
-{
- FRESULT res;
-
-
- res = move_window(fs, 0);
- if (res == FR_OK) {
- /* Update FSInfo sector if needed */
- if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
- fs->winsect = 0;
- mem_set(fs->win, 0, 512);
- ST_WORD(fs->win+BS_55AA, 0xAA55);
- ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
- ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
- ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
- ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
- disk_write(fs->drive, fs->win, fs->fsi_sector, 1);
- fs->fsi_flag = 0;
- }
- /* Make sure that no pending write process in the physical drive */
- if (disk_ioctl(fs->drive, CTRL_SYNC, (void*)NULL) != RES_OK)
- res = FR_DISK_ERR;
- }
-
- return res;
-}
-#endif
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* FAT access - Read value of a FAT entry */
-/*-----------------------------------------------------------------------*/
-
-
-DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Interal error, Else:Cluster status */
- FATFS *fs, /* File system object */
- DWORD clst /* Cluster# to get the link information */
-)
-{
- UINT wc, bc;
- DWORD fsect;
-
-
- if (clst < 2 || clst >= fs->max_clust) /* Range check */
- return 1;
-
- fsect = fs->fatbase;
- switch (fs->fs_type) {
- case FS_FAT12 :
- bc = clst; bc += bc / 2;
- if (move_window(fs, fsect + (bc / SS(fs)))) break;
- wc = fs->win[bc & (SS(fs) - 1)]; bc++;
- if (move_window(fs, fsect + (bc / SS(fs)))) break;
- wc |= (WORD)fs->win[bc & (SS(fs) - 1)] << 8;
- return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
-
- case FS_FAT16 :
- if (move_window(fs, fsect + (clst / (SS(fs) / 2)))) break;
- return LD_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)]);
-
- case FS_FAT32 :
- if (move_window(fs, fsect + (clst / (SS(fs) / 4)))) break;
- return LD_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)]) & 0x0FFFFFFF;
- }
-
- return 0xFFFFFFFF; /* An error occured at the disk I/O layer */
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* FAT access - Change value of a FAT entry */
-/*-----------------------------------------------------------------------*/
-#if !_FS_READONLY
-
-FRESULT put_fat (
- FATFS *fs, /* File system object */
- DWORD clst, /* Cluster# to be changed in range of 2 to fs->max_clust - 1 */
- DWORD val /* New value to mark the cluster */
-)
-{
- UINT bc;
- BYTE *p;
- DWORD fsect;
- FRESULT res;
-
-
- if (clst < 2 || clst >= fs->max_clust) { /* Range check */
- res = FR_INT_ERR;
-
- } else {
- fsect = fs->fatbase;
- switch (fs->fs_type) {
- case FS_FAT12 :
- bc = clst; bc += bc / 2;
- res = move_window(fs, fsect + (bc / SS(fs)));
- if (res != FR_OK) break;
- p = &fs->win[bc & (SS(fs) - 1)];
- *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
- bc++;
- fs->wflag = 1;
- res = move_window(fs, fsect + (bc / SS(fs)));
- if (res != FR_OK) break;
- p = &fs->win[bc & (SS(fs) - 1)];
- *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
- break;
-
- case FS_FAT16 :
- res = move_window(fs, fsect + (clst / (SS(fs) / 2)));
- if (res != FR_OK) break;
- ST_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)], (WORD)val);
- break;
-
- case FS_FAT32 :
- res = move_window(fs, fsect + (clst / (SS(fs) / 4)));
- if (res != FR_OK) break;
- ST_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)], val);
- break;
-
- default :
- res = FR_INT_ERR;
- }
- fs->wflag = 1;
- }
-
- return res;
-}
-#endif /* !_FS_READONLY */
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* FAT handling - Remove a cluster chain */
-/*-----------------------------------------------------------------------*/
-#if !_FS_READONLY
-static
-FRESULT remove_chain (
- FATFS *fs, /* File system object */
- DWORD clst /* Cluster# to remove a chain from */
-)
-{
- FRESULT res;
- DWORD nxt;
-
-
- if (clst < 2 || clst >= fs->max_clust) { /* Check the range of cluster# */
- res = FR_INT_ERR;
-
- } else {
- res = FR_OK;
- while (clst < fs->max_clust) { /* Not a last link? */
- nxt = get_fat(fs, clst); /* Get cluster status */
- if (nxt == 0) break; /* Empty cluster? */
- if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
- if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
- res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
- if (res != FR_OK) break;
- if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
- fs->free_clust++;
- fs->fsi_flag = 1;
- }
- clst = nxt; /* Next cluster */
- }
- }
-
- return res;
-}
-#endif
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* FAT handling - Stretch or Create a cluster chain */
-/*-----------------------------------------------------------------------*/
-#if !_FS_READONLY
-static
-DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
- FATFS *fs, /* File system object */
- DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
-)
-{
- DWORD cs, ncl, scl, mcl;
-
-
- mcl = fs->max_clust;
- if (clst == 0) { /* Create new chain */
- scl = fs->last_clust; /* Get suggested start point */
- if (scl == 0 || scl >= mcl) scl = 1;
- }
- else { /* Stretch existing chain */
- cs = get_fat(fs, clst); /* Check the cluster status */
- if (cs < 2) return 1; /* It is an invalid cluster */
- if (cs < mcl) return cs; /* It is already followed by next cluster */
- scl = clst;
- }
-
- ncl = scl; /* Start cluster */
- for (;;) {
- ncl++; /* Next cluster */
- if (ncl >= mcl) { /* Wrap around */
- ncl = 2;
- if (ncl > scl) return 0; /* No free custer */
- }
- cs = get_fat(fs, ncl); /* Get the cluster status */
- if (cs == 0) break; /* Found a free cluster */
- if (cs == 0xFFFFFFFF || cs == 1)/* An error occured */
- return cs;
- if (ncl == scl) return 0; /* No free custer */
- }
-
- if (put_fat(fs, ncl, 0x0FFFFFFF)) /* Mark the new cluster "in use" */
- return 0xFFFFFFFF;
- if (clst != 0) { /* Link it to the previous one if needed */
- if (put_fat(fs, clst, ncl))
- return 0xFFFFFFFF;
- }
-
- fs->last_clust = ncl; /* Update FSINFO */
- if (fs->free_clust != 0xFFFFFFFF) {
- fs->free_clust--;
- fs->fsi_flag = 1;
- }
-
- return ncl; /* Return new cluster number */
-}
-#endif /* !_FS_READONLY */
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Get sector# from cluster# */
-/*-----------------------------------------------------------------------*/
-
-
-DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
- FATFS *fs, /* File system object */
- DWORD clst /* Cluster# to be converted */
-)
-{
- clst -= 2;
- if (clst >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */
- return clst * fs->csize + fs->database;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Directory handling - Seek directory index */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT dir_seek (
- eDIR *dj, /* Pointer to directory object */
- WORD idx /* Directory index number */
-)
-{
- DWORD clst;
- WORD ic;
-
-
- dj->index = idx;
- clst = dj->sclust;
- if (clst == 1 || clst >= dj->fs->max_clust) /* Check start cluster range */
- return FR_INT_ERR;
- if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
- clst = dj->fs->dirbase;
-
- if (clst == 0) { /* Static table */
- dj->clust = clst;
- if (idx >= dj->fs->n_rootdir) /* Index is out of range */
- return FR_INT_ERR;
- dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / 32); /* Sector# */
- }
- else { /* Dynamic table */
- ic = SS(dj->fs) / 32 * dj->fs->csize; /* Entries per cluster */
- while (idx >= ic) { /* Follow cluster chain */
- clst = get_fat(dj->fs, clst); /* Get next cluster */
- if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
- if (clst < 2 || clst >= dj->fs->max_clust) /* Reached to end of table or int error */
- return FR_INT_ERR;
- idx -= ic;
- }
- dj->clust = clst;
- dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / 32); /* Sector# */
- }
-
- dj->dir = dj->fs->win + (idx % (SS(dj->fs) / 32)) * 32; /* Ptr to the entry in the sector */
-
- return FR_OK; /* Seek succeeded */
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Directory handling - Move directory index next */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not streach */
- eDIR *dj, /* Pointer to directory object */
- BOOL streach /* FALSE: Do not streach table, TRUE: Streach table if needed */
-)
-{
- DWORD clst;
- WORD i;
-
-
- i = dj->index + 1;
- if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
- return FR_NO_FILE;
-
- if (!(i % (SS(dj->fs) / 32))) { /* Sector changed? */
- dj->sect++; /* Next sector */
-
- if (dj->clust == 0) { /* Static table */
- if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
- return FR_NO_FILE;
- }
- else { /* Dynamic table */
- if (((i / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
- clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
- if (clst <= 1) return FR_INT_ERR;
- if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
- if (clst >= dj->fs->max_clust) { /* When it reached end of dynamic table */
-#if !_FS_READONLY
- BYTE c;
- if (!streach) return FR_NO_FILE; /* When do not streach, report EOT */
- clst = create_chain(dj->fs, dj->clust); /* Streach cluster chain */
- if (clst == 0) return FR_DENIED; /* No free cluster */
- if (clst == 1) return FR_INT_ERR;
- if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
- /* Clean-up streached table */
- if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
- mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
- dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
- for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */
- dj->fs->wflag = 1;
- if (move_window(dj->fs, 0)) return FR_DISK_ERR;
- dj->fs->winsect++;
- }
- dj->fs->winsect -= c; /* Rewind window address */
-#else
- return FR_NO_FILE; /* Report EOT */
-#endif
- }
- dj->clust = clst; /* Initialize data for new cluster */
- dj->sect = clust2sect(dj->fs, clst);
- }
- }
- }
-
- dj->index = i;
- dj->dir = dj->fs->win + (i % (SS(dj->fs) / 32)) * 32;
-
- return FR_OK;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
-/*-----------------------------------------------------------------------*/
-#if _USE_LFN
-static
-const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */
-
-
-static
-BOOL cmp_lfn ( /* TRUE:Matched, FALSE:Not matched */
- WCHAR *lfnbuf, /* Pointer to the LFN to be compared */
- BYTE *dir /* Pointer to the directory entry containing a part of LFN */
-)
-{
- int i, s;
- WCHAR wc, uc;
-
-
- i = ((dir[LDIR_Ord] & 0xBF) - 1) * 13; /* Get offset in the LFN buffer */
- s = 0; wc = 1;
- do {
- uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
- if (wc) { /* Last char has not been processed */
- wc = ff_wtoupper(uc); /* Convert it to upper case */
- if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
- return FALSE; /* Not matched */
- } else {
- if (uc != 0xFFFF) return FALSE; /* Check filler */
- }
- } while (++s < 13); /* Repeat until all chars in the entry are checked */
-
- if ((dir[LDIR_Ord] & 0x40) && wc && lfnbuf[i]) /* Last segment matched but different length */
- return FALSE;
-
- return TRUE; /* The part of LFN matched */
-}
-
-
-
-static
-BOOL pick_lfn ( /* TRUE:Succeeded, FALSE:Buffer overflow */
- WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */
- BYTE *dir /* Pointer to the directory entry */
-)
-{
- int i, s;
- WCHAR wc, uc;
-
-
- i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
-
- s = 0; wc = 1;
- do {
- uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
- if (wc) { /* Last char has not been processed */
- if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */
- lfnbuf[i++] = wc = uc; /* Store it */
- } else {
- if (uc != 0xFFFF) return FALSE; /* Check filler */
- }
- } while (++s < 13); /* Read all character in the entry */
-
- if (dir[LDIR_Ord] & 0x40) { /* Put terminator if it is the last LFN part */
- if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */
- lfnbuf[i] = 0;
- }
-
- return TRUE;
-}
-
-
-#if !_FS_READONLY
-static
-void fit_lfn (
- const WCHAR *lfnbuf, /* Pointer to the LFN buffer */
- BYTE *dir, /* Pointer to the directory entry */
- BYTE ord, /* LFN order (1-20) */
- BYTE sum /* SFN sum */
-)
-{
- int i, s;
- WCHAR wc;
-
-
- dir[LDIR_Chksum] = sum; /* Set check sum */
- dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
- dir[LDIR_Type] = 0;
- ST_WORD(dir+LDIR_FstClusLO, 0);
-
- i = (ord - 1) * 13; /* Get offset in the LFN buffer */
- s = wc = 0;
- do {
- if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
- ST_WORD(dir+LfnOfs[s], wc); /* Put it */
- if (!wc) wc = 0xFFFF; /* Padding chars following last char */
- } while (++s < 13);
- if (wc == 0xFFFF || !lfnbuf[i]) ord |= 0x40; /* Bottom LFN part is the start of LFN sequence */
- dir[LDIR_Ord] = ord; /* Set the LFN order */
-}
-
-#endif
-#endif
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Create numbered name */
-/*-----------------------------------------------------------------------*/
-#if _USE_LFN
-void gen_numname (
- BYTE *dst, /* Pointer to genartated SFN */
- const BYTE *src, /* Pointer to source SFN to be modified */
- const WCHAR *lfn, /* Pointer to LFN */
- WORD num /* Sequense number */
-)
-{
- char ns[8];
- int i, j;
-
-
- mem_cpy(dst, src, 11);
-
- if (num > 5) { /* On many collisions, generate a hash number instead of sequencial number */
- do num = (num >> 1) + (num << 15) + (WORD)*lfn++; while (*lfn);
- }
-
- /* itoa */
- i = 7;
- do {
- ns[i--] = (num % 10) + '0';
- num /= 10;
- } while (num);
- ns[i] = '~';
-
- /* Append the number */
- for (j = 0; j < i && dst[j] != ' '; j++) {
- if (IsDBCS1(dst[j])) {
- if (j == i - 1) break;
- j++;
- }
- }
- do {
- dst[j++] = (i < 8) ? ns[i++] : ' ';
- } while (j < 8);
-}
-#endif
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Calculate sum of an SFN */
-/*-----------------------------------------------------------------------*/
-#if _USE_LFN
-static
-BYTE sum_sfn (
- const BYTE *dir /* Ptr to directory entry */
-)
-{
- BYTE sum = 0;
- int n = 11;
-
- do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
- return sum;
-}
-#endif
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Directory handling - Find an object in the directory */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT dir_find (
- eDIR *dj /* Pointer to the directory object linked to the file name */
-)
-{
- FRESULT res;
- BYTE c, *dir;
-#if _USE_LFN
- BYTE a, ord, sum;
-#endif
-
- res = dir_seek(dj, 0); /* Rewind directory object */
- if (res != FR_OK) return res;
-
-#if _USE_LFN
- ord = sum = 0xFF;
-#endif
- do {
- res = move_window(dj->fs, dj->sect);
- if (res != FR_OK) break;
- dir = dj->dir; /* Ptr to the directory entry of current index */
- c = dir[DIR_Name];
- if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
-#if _USE_LFN /* LFN configuration */
- a = dir[DIR_Attr] & AM_MASK;
- if (c == 0xE5 || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
- ord = 0xFF;
- } else {
- if (a == AM_LFN) { /* An LFN entry is found */
- if (dj->lfn) {
- if (c & 0x40) { /* Is it start of LFN sequence? */
- sum = dir[LDIR_Chksum];
- c &= 0xBF; ord = c; /* LFN start order */
- dj->lfn_idx = dj->index;
- }
- /* Check validity of the LFN entry and compare it with given name */
- ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
- }
- } else { /* An SFN entry is found */
- if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
- ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
- if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */
- }
- }
-#else /* Non LFN configuration */
- if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
- break;
-#endif
- res = dir_next(dj, FALSE); /* Next entry */
- } while (res == FR_OK);
-
- return res;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Read an object from the directory */
-/*-----------------------------------------------------------------------*/
-#if _FS_MINIMIZE <= 1
-static
-FRESULT dir_read (
- eDIR *dj /* Pointer to the directory object that pointing the entry to be read */
-)
-{
- FRESULT res;
- BYTE c, *dir;
-#if _USE_LFN
- BYTE a, ord = 0xFF, sum = 0xFF;
-#endif
-
- res = FR_NO_FILE;
- while (dj->sect) {
- res = move_window(dj->fs, dj->sect);
- if (res != FR_OK) break;
- dir = dj->dir; /* Ptr to the directory entry of current index */
- c = dir[DIR_Name];
- if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
-#if _USE_LFN /* LFN configuration */
- a = dir[DIR_Attr] & AM_MASK;
- if (c == 0xE5 || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
- ord = 0xFF;
- } else {
- if (a == AM_LFN) { /* An LFN entry is found */
- if (c & 0x40) { /* Is it start of LFN sequence? */
- sum = dir[LDIR_Chksum];
- c &= 0xBF; ord = c;
- dj->lfn_idx = dj->index;
- }
- /* Check LFN validity and capture it */
- ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
- } else { /* An SFN entry is found */
- if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
- dj->lfn_idx = 0xFFFF; /* It has no LFN. */
- break;
- }
- }
-#else /* Non LFN configuration */
- if (c != 0xE5 && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
- break;
-#endif
- res = dir_next(dj, FALSE); /* Next entry */
- if (res != FR_OK) break;
- }
-
- if (res != FR_OK) dj->sect = 0;
-
- return res;
-}
-#endif
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Register an object to the directory */
-/*-----------------------------------------------------------------------*/
-#if !_FS_READONLY
-static
-FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
- eDIR *dj /* Target directory with object name to be created */
-)
-{
- FRESULT res;
- BYTE c, *dir;
-#if _USE_LFN /* LFN configuration */
- WORD n, ne, is;
- BYTE sn[12], *fn, sum;
- WCHAR *lfn;
-
-
- fn = dj->fn; lfn = dj->lfn;
- mem_cpy(sn, fn, 12);
-
- if (_FS_RPATH && (sn[NS] & NS_DOT)) return FR_INVALID_NAME; /* Cannot create dot entry */
-
- if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
- fn[NS] = 0; dj->lfn = NULL; /* Find only SFN */
- for (n = 1; n < 100; n++) {
- gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
- res = dir_find(dj); /* Check if the name collides with existing SFN */
- if (res != FR_OK) break;
- }
- if (n == 100) return FR_DENIED; /* Abort if too many collisions */
- if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
- fn[NS] = sn[NS]; dj->lfn = lfn;
- }
-
- if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve reserve an SFN + LFN entries. */
- for (ne = 0; lfn[ne]; ne++) ;
- ne = (ne + 25) / 13;
- } else { /* Otherwise reserve only an SFN entry. */
- ne = 1;
- }
-
- /* Reserve contiguous entries */
- res = dir_seek(dj, 0);
- if (res != FR_OK) return res;
- n = is = 0;
- do {
- res = move_window(dj->fs, dj->sect);
- if (res != FR_OK) break;
- c = *dj->dir; /* Check the entry status */
- if (c == 0xE5 || c == 0) { /* Is it a blank entry? */
- if (n == 0) is = dj->index; /* First index of the contigulus entry */
- if (++n == ne) break; /* A contiguous entry that requiered count is found */
- } else {
- n = 0; /* Not a blank entry. Restart to search */
- }
- res = dir_next(dj, TRUE); /* Next entry with table streach */
- } while (res == FR_OK);
-
- if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */
- res = dir_seek(dj, is);
- if (res == FR_OK) {
- sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */
- ne--;
- do { /* Store LFN entries in bottom first */
- res = move_window(dj->fs, dj->sect);
- if (res != FR_OK) break;
- fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
- dj->fs->wflag = 1;
- res = dir_next(dj, FALSE); /* Next entry */
- } while (res == FR_OK && --ne);
- }
- }
-
-#else /* Non LFN configuration */
- res = dir_seek(dj, 0);
- if (res == FR_OK) {
- do { /* Find a blank entry for the SFN */
- res = move_window(dj->fs, dj->sect);
- if (res != FR_OK) break;
- c = *dj->dir;
- if (c == 0xE5 || c == 0) break; /* Is it a blank entry? */
- res = dir_next(dj, TRUE); /* Next entry with table streach */
- } while (res == FR_OK);
- }
-#endif
-
- if (res == FR_OK) { /* Initialize the SFN entry */
- res = move_window(dj->fs, dj->sect);
- if (res == FR_OK) {
- dir = dj->dir;
- mem_set(dir, 0, 32); /* Clean the entry */
- mem_cpy(dir, dj->fn, 11); /* Put SFN */
- dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */
- dj->fs->wflag = 1;
- }
- }
-
- return res;
-}
-#endif /* !_FS_READONLY */
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Remove an object from the directory */
-/*-----------------------------------------------------------------------*/
-#if !_FS_READONLY && !_FS_MINIMIZE
-static
-FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
- eDIR *dj /* Directory object pointing the entry to be removed */
-)
-{
- FRESULT res;
-#if _USE_LFN /* LFN configuration */
- WORD i;
-
- i = dj->index; /* SFN index */
- res = dir_seek(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
- if (res == FR_OK) {
- do {
- res = move_window(dj->fs, dj->sect);
- if (res != FR_OK) break;
- *dj->dir = 0xE5; /* Mark the entry "deleted" */
- dj->fs->wflag = 1;
- if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
- res = dir_next(dj, FALSE); /* Next entry */
- } while (res == FR_OK);
- if (res == FR_NO_FILE) res = FR_INT_ERR;
- }
-
-#else /* Non LFN configuration */
- res = dir_seek(dj, dj->index);
- if (res == FR_OK) {
- res = move_window(dj->fs, dj->sect);
- if (res == FR_OK) {
- *dj->dir = 0xE5; /* Mark the entry "deleted" */
- dj->fs->wflag = 1;
- }
- }
-#endif
-
- return res;
-}
-#endif /* !_FS_READONLY */
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Pick a segment and create the object name in directory form */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT create_name (
- eDIR *dj, /* Pointer to the directory object */
- const XCHAR **path /* Pointer to pointer to the segment in the path string */
-)
-{
-#ifdef _EXCVT
- static const BYTE cvt[] = _EXCVT;
-#endif
-
-#if _USE_LFN /* LFN configuration */
- BYTE b, cf;
- WCHAR w, *lfn;
- int i, ni, si, di;
- const XCHAR *p;
-
- /* Create LFN in Unicode */
- si = di = 0;
- p = *path;
- lfn = dj->lfn;
- for (;;) {
- w = p[si++]; /* Get a character */
- if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
- if (di >= _MAX_LFN) /* Reject too long name */
- return FR_INVALID_NAME;
-#if !_LFN_UNICODE
- w &= 0xFF;
- if (IsDBCS1(w)) { /* If it is a DBC 1st byte */
- b = p[si++]; /* Get 2nd byte */
- if (!IsDBCS2(b)) /* Reject invalid code for DBC */
- return FR_INVALID_NAME;
- w = (w << 8) + b;
- }
- w = ff_convert(w, 1); /* Convert OEM to Unicode */
- if (!w) return FR_INVALID_NAME; /* Reject invalid code */
-#endif
- if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
- return FR_INVALID_NAME;
- lfn[di++] = w; /* Store the Unicode char */
- }
- *path = &p[si]; /* Rerurn pointer to the next segment */
- cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
-#if _FS_RPATH
- if ((di == 1 && lfn[di - 1] == '.') || /* Is this a dot entry? */
- (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) {
- lfn[di] = 0;
- for (i = 0; i < 11; i++)
- dj->fn[i] = (i < di) ? '.' : ' ';
- dj->fn[i] = cf | NS_DOT; /* This is a dot entry */
- return FR_OK;
- }
-#endif
- while (di) { /* Strip trailing spaces and dots */
- w = lfn[di - 1];
- if (w != ' ' && w != '.') break;
- di--;
- }
- if (!di) return FR_INVALID_NAME; /* Reject null string */
-
- lfn[di] = 0; /* LFN is created */
-
- /* Create SFN in directory form */
- mem_set(dj->fn, ' ', 11);
- for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
- if (si) cf |= NS_LOSS | NS_LFN;
- while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
-
- b = i = 0; ni = 8;
- for (;;) {
- w = lfn[si++]; /* Get an LFN char */
- if (!w) break; /* Break on enf of the LFN */
- if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
- cf |= NS_LOSS | NS_LFN; continue;
- }
-
- if (i >= ni || si == di) { /* Extension or end of SFN */
- if (ni == 11) { /* Long extension */
- cf |= NS_LOSS | NS_LFN; break;
- }
- if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
- if (si > di) break; /* No extension */
- si = di; i = 8; ni = 11; /* Enter extension section */
- b <<= 2; continue;
- }
-
- if (w >= 0x80) { /* Non ASCII char */
-#ifdef _EXCVT
- w = ff_convert(w, 0); /* Unicode -> OEM code */
- if (w) w = cvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
-#else
- w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
-#endif
- cf |= NS_LFN; /* Force create LFN entry */
- }
-
- if (_DF1S && w >= 0x100) { /* Double byte char */
- if (i >= ni - 1) {
- cf |= NS_LOSS | NS_LFN; i = ni; continue;
- }
- dj->fn[i++] = (BYTE)(w >> 8);
- } else { /* Single byte char */
- if (!w || chk_chr("+,;[=]", w)) { /* Replace illegal chars for SFN */
- w = '_'; cf |= NS_LOSS | NS_LFN; /* Lossy conversion */
- } else {
- if (IsUpper(w)) { /* ASCII large capital */
- b |= 2;
- } else {
- if (IsLower(w)) { /* ASCII small capital */
- b |= 1; w -= 0x20;
- }
- }
- }
- }
- dj->fn[i++] = (BYTE)w;
- }
-
- if (dj->fn[0] == 0xE5) dj->fn[0] = 0x05; /* If the first char collides with deleted mark, replace it with 0x05 */
-
- if (ni == 8) b <<= 2;
- if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
- cf |= NS_LFN;
- if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */
- if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
- if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
- }
-
- dj->fn[NS] = cf; /* SFN is created */
-
- return FR_OK;
-
-
-#else /* Non-LFN configuration */
- BYTE b, c, d, *sfn;
- int ni, si, i;
- const char *p;
-
- /* Create file name in directory form */
- sfn = dj->fn;
- mem_set(sfn, ' ', 11);
- si = i = b = 0; ni = 8;
- p = *path;
-#if _FS_RPATH
- if (p[si] == '.') { /* Is this a dot entry? */
- for (;;) {
- c = p[si++];
- if (c != '.' || si >= 3) break;
- sfn[i++] = c;
- }
- if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
- *path = &p[si]; /* Rerurn pointer to the next segment */
- sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
- return FR_OK;
- }
-#endif
- for (;;) {
- c = p[si++];
- if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
- if (c == '.' || i >= ni) {
- if (ni != 8 || c != '.') return FR_INVALID_NAME;
- i = 8; ni = 11;
- b <<= 2; continue;
- }
- if (c >= 0x80) { /* Extended char */
-#ifdef _EXCVT
- c = cvt[c - 0x80]; /* Convert extend char (SBCS) */
-#else
- b |= 3; /* Eliminate NT flag if ext char is exist */
-#if !_DF1S /* ASCII only cfg */
- return FR_INVALID_NAME;
-#endif
-#endif
- }
- if (IsDBCS1(c)) { /* DBC 1st byte? */
- d = p[si++]; /* Get 2nd byte */
- if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
- return FR_INVALID_NAME;
- sfn[i++] = c;
- sfn[i++] = d;
- } else { /* Single byte code */
- if (chk_chr(" \"*+,[=]|\x7F", c)) /* Reject illegal chrs for SFN */
- return FR_INVALID_NAME;
- if (IsUpper(c)) { /* ASCII large capital? */
- b |= 2;
- } else {
- if (IsLower(c)) { /* ASCII small capital? */
- b |= 1; c -= 0x20;
- }
- }
- sfn[i++] = c;
- }
- }
- *path = &p[si]; /* Rerurn pointer to the next segment */
- c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
-
- if (!i) return FR_INVALID_NAME; /* Reject null string */
- if (sfn[0] == 0xE5) sfn[0] = 0x05; /* When first char collides with 0xE5, replace it with 0x05 */
-
- if (ni == 8) b <<= 2;
- if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Extension has only small capital) */
- if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Filename has only small capital) */
-
- sfn[NS] = c; /* Store NT flag, File name is created */
-
- return FR_OK;
-#endif
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Get file information from directory entry */
-/*-----------------------------------------------------------------------*/
-#if _FS_MINIMIZE <= 1
-static
-void get_fileinfo ( /* No return code */
- eDIR *dj, /* Pointer to the directory object */
- FILINFO *fno /* Pointer to the file information to be filled */
-)
-{
- int i;
- BYTE c, nt, *dir;
- char *p;
-
-
- p = fno->fname;
- if (dj->sect) {
- dir = dj->dir;
- nt = dir[DIR_NTres]; /* NT flag */
- for (i = 0; i < 8; i++) { /* Copy name body */
- c = dir[i];
- if (c == ' ') break;
- if (c == 0x05) c = 0xE5;
- if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
- *p++ = c;
- }
- if (dir[8] != ' ') { /* Copy name extension */
- *p++ = '.';
- for (i = 8; i < 11; i++) {
- c = dir[i];
- if (c == ' ') break;
- if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
- *p++ = c;
- }
- }
- fno->fattrib = dir[DIR_Attr]; /* Attribute */
- fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
- fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
- fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
- }
- *p = 0;
-
-#if _USE_LFN
- if (fno->lfname) {
- XCHAR *tp = fno->lfname;
- WCHAR w, *lfn;
-
- i = 0;
- if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
- lfn = dj->lfn;
- while ((w = *lfn++) != 0) { /* Get an LFN char */
-#if !_LFN_UNICODE
- w = ff_convert(w, 0); /* Unicode -> OEM conversion */
- if (!w) { i = 0; break; } /* Could not convert, no LFN */
- if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC */
- tp[i++] = (XCHAR)(w >> 8);
-#endif
- if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overrun, no LFN */
- tp[i++] = (XCHAR)w;
- }
- }
- tp[i] = 0; /* Terminator */
- }
-#endif
-}
-#endif /* _FS_MINIMIZE <= 1 */
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Follow a file path */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
- eDIR *dj, /* Directory object to return last directory and found object */
- const XCHAR *path /* Full-path string to find a file or directory */
-)
-{
- FRESULT res;
- BYTE *dir, last;
-
-
- while (!_USE_LFN && *path == ' ') path++; /* Skip leading spaces */
-#if _FS_RPATH
- if (*path == '/' || *path == '\\') { /* There is a heading separator */
- path++; dj->sclust = 0; /* Strip it and start from the root dir */
- } else { /* No heading saparator */
- dj->sclust = dj->fs->cdir; /* Start from the current dir */
- }
-#else
- if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
- path++;
- dj->sclust = 0; /* Start from the root dir */
-#endif
-
- if ((UINT)*path < ' ') { /* Null path means the start directory itself */
- res = dir_seek(dj, 0);
- dj->dir = NULL;
-
- } else { /* Follow path */
- for (;;) {
- res = create_name(dj, &path); /* Get a segment */
- if (res != FR_OK) break;
- res = dir_find(dj); /* Find it */
- last = *(dj->fn+NS) & NS_LAST;
- if (res != FR_OK) { /* Could not find the object */
- if (res == FR_NO_FILE && !last)
- res = FR_NO_PATH;
- break;
- }
- if (last) break; /* Last segment match. Function completed. */
- dir = dj->dir; /* There is next segment. Follow the sub directory */
- if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
- res = FR_NO_PATH; break;
- }
- dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
- }
- }
-
- return res;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Load boot record and check if it is an FAT boot record */
-/*-----------------------------------------------------------------------*/
-
-static
-BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */
- FATFS *fs, /* File system object */
- DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
-)
-{
- if (disk_read(fs->drive, fs->win, sect, 1) != RES_OK) /* Load boot record */
- return 3;
- if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
- return 2;
-
- if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
- return 0;
- if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
- return 0;
-
- return 1;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Make sure that the file system is valid */
-/*-----------------------------------------------------------------------*/
-
-
-FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occured */
- const XCHAR **path, /* Pointer to pointer to the path name (drive number) */
- FATFS **rfs, /* Pointer to pointer to the found file system object */
- BYTE chk_wp /* !=0: Check media write protection for write access */
-)
-{
- BYTE fmt, *tbl;
- UINT vol;
- DSTATUS stat;
- DWORD bsect, fsize, tsect, mclst;
- const XCHAR *p = *path;
- FATFS *fs;
-
- /* Get logical drive number from the path name */
- vol = p[0] - '0'; /* Is there a drive number? */
- if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */
- p += 2; *path = p; /* Return pointer to the path name */
- } else { /* No drive number is given */
-#if _FS_RPATH
- vol = Drive; /* Use current drive */
-#else
- vol = 0; /* Use drive 0 */
-#endif
- }
-
- /* Check if the logical drive is valid or not */
- if (vol >= _DRIVES) /* Is the drive number valid? */
- return FR_INVALID_DRIVE;
- *rfs = fs = FatFs[vol]; /* Returen pointer to the corresponding file system object */
- if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
-
- ENTER_FF(fs); /* Lock file system */
-
- if (fs->fs_type) { /* If the logical drive has been mounted */
- stat = disk_status(fs->drive);
- if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */
-#if !_FS_READONLY
- if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
- return FR_WRITE_PROTECTED;
-#endif
- return FR_OK; /* The file system object is valid */
- }
- }
-
- /* The logical drive must be mounted. Following code attempts to mount the volume */
-
- fs->fs_type = 0; /* Clear the file system object */
- fs->drive = (BYTE)LD2PD(vol); /* Bind the logical drive and a physical drive */
- stat = disk_initialize(fs->drive); /* Initialize low level disk I/O layer */
- if (stat & STA_NOINIT) /* Check if the drive is ready */
- return FR_NOT_READY;
-#if _MAX_SS != 512 /* Get disk sector size if needed */
- if (disk_ioctl(fs->drive, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
- return FR_NO_FILESYSTEM;
-#endif
-#if !_FS_READONLY
- if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */
- return FR_WRITE_PROTECTED;
-#endif
- /* Search FAT partition on the drive */
- fmt = check_fs(fs, bsect = 0); /* Check sector 0 as an SFD format */
- if (fmt == 1) { /* Not an FAT boot record, it may be patitioned */
- /* Check a partition listed in top of the partition table */
- tbl = &fs->win[MBR_Table + LD2PT(vol) * 16]; /* Partition table */
- if (tbl[4]) { /* Is the partition existing? */
- bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
- fmt = check_fs(fs, bsect); /* Check the partition */
- }
- }
- if (fmt == 3) return FR_DISK_ERR;
- if (fmt || LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* No valid FAT patition is found */
- return FR_NO_FILESYSTEM;
-
- /* Initialize the file system object */
- fsize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
- if (!fsize) fsize = LD_DWORD(fs->win+BPB_FATSz32);
- fs->sects_fat = fsize;
- fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
- fsize *= fs->n_fats; /* (Number of sectors in FAT area) */
- fs->fatbase = bsect + LD_WORD(fs->win+BPB_RsvdSecCnt); /* FAT start sector (lba) */
- fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
- fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Nmuber of root directory entries */
- tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
- if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
- fs->max_clust = mclst = (tsect /* Last cluster# + 1 (Number of clusters + 2) */
- - LD_WORD(fs->win+BPB_RsvdSecCnt) - fsize - fs->n_rootdir / (SS(fs)/32)
- ) / fs->csize + 2;
-
- fmt = FS_FAT12; /* Determine the FAT sub type */
- if (mclst >= 0xFF7) fmt = FS_FAT16; /* Number of clusters >= 0xFF5 */
- if (mclst >= 0xFFF7) fmt = FS_FAT32; /* Number of clusters >= 0xFFF5 */
-
- if (fmt == FS_FAT32)
- fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
- else
- fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */
- fs->database = fs->fatbase + fsize + fs->n_rootdir / (SS(fs)/32); /* Data start sector (lba) */
-
-#if !_FS_READONLY
- /* Initialize allocation information */
- fs->free_clust = 0xFFFFFFFF;
- fs->wflag = 0;
- /* Get fsinfo if needed */
- if (fmt == FS_FAT32) {
- fs->fsi_flag = 0;
- fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
- if (disk_read(fs->drive, fs->win, fs->fsi_sector, 1) == RES_OK &&
- LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
- LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
- LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
- fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
- fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
- }
- }
-#endif
- fs->fs_type = fmt; /* FAT sub-type */
- fs->winsect = 0; /* Invalidate sector cache */
-#if _FS_RPATH
- fs->cdir = 0; /* Current directory (root dir) */
-#endif
- fs->id = ++Fsid; /* File system mount ID */
-
- return FR_OK;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Check if the file/dir object is valid or not */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
- FATFS *fs, /* Pointer to the file system object */
- WORD id /* Member id of the target object to be checked */
-)
-{
- if (!fs || !fs->fs_type || fs->id != id)
- return FR_INVALID_OBJECT;
-
- ENTER_FF(fs); /* Lock file system */
-
- if (disk_status(fs->drive) & STA_NOINIT)
- return FR_NOT_READY;
-
- return FR_OK;
-}
-
-
-
-
-/*--------------------------------------------------------------------------
-
- Public Functions
-
---------------------------------------------------------------------------*/
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Mount/Unmount a Locical Drive */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_mount (
- BYTE vol, /* Logical drive number to be mounted/unmounted */
- FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
-)
-{
- FATFS *rfs;
-
-
- if (vol >= _DRIVES) /* Check if the drive number is valid */
- return FR_INVALID_DRIVE;
- rfs = FatFs[vol]; /* Get current fs object */
-
- if (rfs) {
-#if _FS_REENTRANT /* Discard sync object of the current volume */
- if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
-#endif
- rfs->fs_type = 0; /* Clear old fs object */
- }
-
- if (fs) {
- fs->fs_type = 0; /* Clear new fs object */
-#if _FS_REENTRANT /* Create sync object for the new volume */
- if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
-#endif
- }
- FatFs[vol] = fs; /* Register new fs object */
-
- return FR_OK;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Open or Create a File */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_open (
- FIL *fp, /* Pointer to the blank file object */
- const XCHAR *path, /* Pointer to the file name */
- BYTE mode /* Access mode and file open mode flags */
-)
-{
- FRESULT res;
- eDIR dj;
- NAMEBUF(sfn, lfn);
- BYTE *dir;
-
-
- fp->fs = NULL; /* Clear file object */
-#if !_FS_READONLY
- mode &= (FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW);
- res = chk_mounted(&path, &dj.fs, (BYTE)(mode & (FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)));
-#else
- mode &= FA_READ;
- res = chk_mounted(&path, &dj.fs, 0);
-#endif
- if (res != FR_OK) LEAVE_FF(dj.fs, res);
- INITBUF(dj, sfn, lfn);
- res = follow_path(&dj, path); /* Follow the file path */
-
-#if !_FS_READONLY
- /* Create or Open a file */
- if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
- DWORD ps, cl;
-
- if (res != FR_OK) { /* No file, create new */
- if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
- res = dir_register(&dj);
- if (res != FR_OK) LEAVE_FF(dj.fs, res);
- mode |= FA_CREATE_ALWAYS;
- dir = dj.dir; /* Created entry (SFN entry) */
- }
- else { /* Any object is already existing */
- if (mode & FA_CREATE_NEW) /* Cannot create new */
- LEAVE_FF(dj.fs, FR_EXIST);
- dir = dj.dir;
- if (!dir || (dir[DIR_Attr] & (AM_RDO | AM_DIR))) /* Cannot overwrite it (R/O or DIR) */
- LEAVE_FF(dj.fs, FR_DENIED);
- if (mode & FA_CREATE_ALWAYS) { /* Resize it to zero on over write mode */
- cl = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO); /* Get start cluster */
- ST_WORD(dir+DIR_FstClusHI, 0); /* cluster = 0 */
- ST_WORD(dir+DIR_FstClusLO, 0);
- ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */
- dj.fs->wflag = 1;
- ps = dj.fs->winsect; /* Remove the cluster chain */
- if (cl) {
- res = remove_chain(dj.fs, cl);
- if (res) LEAVE_FF(dj.fs, res);
- dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
- }
- res = move_window(dj.fs, ps);
- if (res != FR_OK) LEAVE_FF(dj.fs, res);
- }
- }
- if (mode & FA_CREATE_ALWAYS) {
- dir[DIR_Attr] = 0; /* Reset attribute */
- ps = get_fattime();
- ST_DWORD(dir+DIR_CrtTime, ps); /* Created time */
- dj.fs->wflag = 1;
- mode |= FA__WRITTEN; /* Set file changed flag */
- }
- }
- /* Open an existing file */
- else {
-#endif /* !_FS_READONLY */
- if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
- dir = dj.dir;
- if (!dir || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */
- LEAVE_FF(dj.fs, FR_NO_FILE);
-#if !_FS_READONLY
- if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
- LEAVE_FF(dj.fs, FR_DENIED);
- }
- fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
- fp->dir_ptr = dj.dir;
-#endif
- fp->flag = mode; /* File access mode */
- fp->org_clust = /* File start cluster */
- ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
- fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
- fp->fptr = 0; fp->csect = 255; /* File pointer */
- fp->dsect = 0;
- fp->fs = dj.fs; fp->id = dj.fs->id; /* Owner file system object of the file */
-
- LEAVE_FF(dj.fs, FR_OK);
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Read File */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_read (
- FIL *fp, /* Pointer to the file object */
- void *buff, /* Pointer to data buffer */
- UINT btr, /* Number of bytes to read */
- UINT *br /* Pointer to number of bytes read */
-)
-{
- FRESULT res;
- DWORD clst, sect, remain;
- UINT rcnt, cc;
- BYTE *rbuff = (BYTE *)buff;
-
-
- *br = 0; /* Initialize bytes read */
-
- res = validate(fp->fs, fp->id); /* Check validity of the object */
- if (res != FR_OK) LEAVE_FF(fp->fs, res);
- if (fp->flag & FA__ERROR) /* Check abort flag */
- LEAVE_FF(fp->fs, FR_INT_ERR);
- if (!(fp->flag & FA_READ)) /* Check access mode */
- LEAVE_FF(fp->fs, FR_DENIED);
- remain = fp->fsize - fp->fptr;
- if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
-
- for ( ; btr; /* Repeat until all data transferred */
- rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
- if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
- if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
- clst = (fp->fptr == 0) ? /* On the top of the file? */
- fp->org_clust : get_fat(fp->fs, fp->curr_clust);
- if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
- if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
- fp->curr_clust = clst; /* Update current cluster */
- fp->csect = 0; /* Reset sector offset in the cluster */
- }
- sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
- if (!sect) ABORT(fp->fs, FR_INT_ERR);
- sect += fp->csect;
- cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
- if (cc) { /* Read maximum contiguous sectors directly */
- if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
- cc = fp->fs->csize - fp->csect;
- if (disk_read(fp->fs->drive, rbuff, sect, (BYTE)cc) != RES_OK)
- ABORT(fp->fs, FR_DISK_ERR);
-#if !_FS_READONLY && _FS_MINIMIZE <= 2
-#if _FS_TINY
- if (fp->fs->wflag && fp->fs->winsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */
- mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
-#else
- if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */
- mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
-#endif
-#endif
- fp->csect += (BYTE)cc; /* Next sector address in the cluster */
- rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
- continue;
- }
-#if !_FS_TINY
-#if !_FS_READONLY
- if (fp->flag & FA__DIRTY) { /* Write sector I/O buffer if needed */
- if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
- ABORT(fp->fs, FR_DISK_ERR);
- fp->flag &= ~FA__DIRTY;
- }
-#endif
- if (fp->dsect != sect) { /* Fill sector buffer with file data */
- if (disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
- ABORT(fp->fs, FR_DISK_ERR);
- }
-#endif
- fp->dsect = sect;
- fp->csect++; /* Next sector address in the cluster */
- }
- rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
- if (rcnt > btr) rcnt = btr;
-#if _FS_TINY
- if (move_window(fp->fs, fp->dsect)) /* Move sector window */
- ABORT(fp->fs, FR_DISK_ERR);
- mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
-#else
- mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
-#endif
- }
-
- LEAVE_FF(fp->fs, FR_OK);
-}
-
-
-
-
-#if !_FS_READONLY
-/*-----------------------------------------------------------------------*/
-/* Write File */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_write (
- FIL *fp, /* Pointer to the file object */
- const void *buff, /* Pointer to the data to be written */
- UINT btw, /* Number of bytes to write */
- UINT *bw /* Pointer to number of bytes written */
-)
-{
- FRESULT res;
- DWORD clst, sect;
- UINT wcnt, cc;
- const BYTE *wbuff = (const BYTE *)buff;
-
-
- *bw = 0; /* Initialize bytes written */
-
- res = validate(fp->fs, fp->id); /* Check validity of the object */
- if (res != FR_OK) LEAVE_FF(fp->fs, res);
- if (fp->flag & FA__ERROR) /* Check abort flag */
- LEAVE_FF(fp->fs, FR_INT_ERR);
- if (!(fp->flag & FA_WRITE)) /* Check access mode */
- LEAVE_FF(fp->fs, FR_DENIED);
- if (fp->fsize + btw < fp->fsize) btw = 0; /* File size cannot reach 4GB */
-
- for ( ; btw; /* Repeat until all data transferred */
- wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
- if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
- if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
- if (fp->fptr == 0) { /* On the top of the file? */
- clst = fp->org_clust; /* Follow from the origin */
- if (clst == 0) /* When there is no cluster chain, */
- fp->org_clust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
- } else { /* Middle or end of the file */
- clst = create_chain(fp->fs, fp->curr_clust); /* Follow or streach cluster chain */
- }
- if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
- if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
- if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
- fp->curr_clust = clst; /* Update current cluster */
- fp->csect = 0; /* Reset sector address in the cluster */
- }
-#if _FS_TINY
- if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write back data buffer prior to following direct transfer */
- ABORT(fp->fs, FR_DISK_ERR);
-#else
- if (fp->flag & FA__DIRTY) { /* Write back data buffer prior to following direct transfer */
- if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
- ABORT(fp->fs, FR_DISK_ERR);
- fp->flag &= ~FA__DIRTY;
- }
-#endif
- sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
- if (!sect) ABORT(fp->fs, FR_INT_ERR);
- sect += fp->csect;
- cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
- if (cc) { /* Write maximum contiguous sectors directly */
- if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
- cc = fp->fs->csize - fp->csect;
- if (disk_write(fp->fs->drive, wbuff, sect, (BYTE)cc) != RES_OK)
- ABORT(fp->fs, FR_DISK_ERR);
-#if _FS_TINY
- if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
- mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
- fp->fs->wflag = 0;
- }
-#else
- if (fp->dsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
- mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
- fp->flag &= ~FA__DIRTY;
- }
-#endif
- fp->csect += (BYTE)cc; /* Next sector address in the cluster */
- wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
- continue;
- }
-#if _FS_TINY
- if (fp->fptr >= fp->fsize) { /* Avoid silly buffer filling at growing edge */
- if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
- fp->fs->winsect = sect;
- }
-#else
- if (fp->dsect != sect) { /* Fill sector buffer with file data */
- if (fp->fptr < fp->fsize &&
- disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
- ABORT(fp->fs, FR_DISK_ERR);
- }
-#endif
- fp->dsect = sect;
- fp->csect++; /* Next sector address in the cluster */
- }
- wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Put partial sector into file I/O buffer */
- if (wcnt > btw) wcnt = btw;
-#if _FS_TINY
- if (move_window(fp->fs, fp->dsect)) /* Move sector window */
- ABORT(fp->fs, FR_DISK_ERR);
- mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
- fp->fs->wflag = 1;
-#else
- mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
- fp->flag |= FA__DIRTY;
-#endif
- }
-
- if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
- fp->flag |= FA__WRITTEN; /* Set file changed flag */
-
- LEAVE_FF(fp->fs, FR_OK);
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Synchronize the File Object */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_sync (
- FIL *fp /* Pointer to the file object */
-)
-{
- FRESULT res;
- DWORD tim;
- BYTE *dir;
-
-
- res = validate(fp->fs, fp->id); /* Check validity of the object */
- if (res == FR_OK) {
- if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
-#if !_FS_TINY /* Write-back dirty buffer */
- if (fp->flag & FA__DIRTY) {
- if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
- LEAVE_FF(fp->fs, FR_DISK_ERR);
- fp->flag &= ~FA__DIRTY;
- }
-#endif
- /* Update the directory entry */
- res = move_window(fp->fs, fp->dir_sect);
- if (res == FR_OK) {
- dir = fp->dir_ptr;
- dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
- ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
- ST_WORD(dir+DIR_FstClusLO, fp->org_clust); /* Update start cluster */
- ST_WORD(dir+DIR_FstClusHI, fp->org_clust >> 16);
- tim = get_fattime(); /* Updated time */
- ST_DWORD(dir+DIR_WrtTime, tim);
- fp->flag &= ~FA__WRITTEN;
- fp->fs->wflag = 1;
- res = sync(fp->fs);
- }
- }
- }
-
- LEAVE_FF(fp->fs, res);
-}
-
-#endif /* !_FS_READONLY */
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Close File */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_close (
- FIL *fp /* Pointer to the file object to be closed */
-)
-{
- FRESULT res;
-
-
-#if _FS_READONLY
- res = validate(fp->fs, fp->id);
- if (res == FR_OK) fp->fs = NULL;
- LEAVE_FF(fp->fs, res);
-#else
- res = f_sync(fp);
- if (res == FR_OK) fp->fs = NULL;
- return res;
-#endif
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Change Current Drive/Directory */
-/*-----------------------------------------------------------------------*/
-
-#if _FS_RPATH
-
-FRESULT f_chdrive (
- BYTE drv /* Drive number */
-)
-{
- if (drv >= _DRIVES) return FR_INVALID_DRIVE;
-
- Drive = drv;
-
- return FR_OK;
-}
-
-
-
-
-FRESULT f_chdir (
- const XCHAR *path /* Pointer to the directory path */
-)
-{
- FRESULT res;
- DIR dj;
- NAMEBUF(sfn, lfn);
- BYTE *dir;
-
-
- res = chk_mounted(&path, &dj.fs, 0);
- if (res == FR_OK) {
- INITBUF(dj, sfn, lfn);
- res = follow_path(&dj, path); /* Follow the file path */
- if (res == FR_OK) { /* Follow completed */
- dir = dj.dir; /* Pointer to the entry */
- if (!dir) {
- dj.fs->cdir = 0; /* No entry (root dir) */
- } else {
- if (dir[DIR_Attr] & AM_DIR) /* Reached to the dir */
- dj.fs->cdir = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
- else
- res = FR_NO_PATH; /* Could not reach the dir (it is a file) */
- }
- }
- if (res == FR_NO_FILE) res = FR_NO_PATH;
- }
-
- LEAVE_FF(dj.fs, res);
-}
-
-#endif
-
-
-
-#if _FS_MINIMIZE <= 2
-/*-----------------------------------------------------------------------*/
-/* Seek File R/W Pointer */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_lseek (
- FIL *fp, /* Pointer to the file object */
- DWORD ofs /* File pointer from top of file */
-)
-{
- FRESULT res;
- DWORD clst, bcs, nsect, ifptr;
-
-
- res = validate(fp->fs, fp->id); /* Check validity of the object */
- if (res != FR_OK) LEAVE_FF(fp->fs, res);
- if (fp->flag & FA__ERROR) /* Check abort flag */
- LEAVE_FF(fp->fs, FR_INT_ERR);
- if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
-#if !_FS_READONLY
- && !(fp->flag & FA_WRITE)
-#endif
- ) ofs = fp->fsize;
-
- ifptr = fp->fptr;
- fp->fptr = nsect = 0; fp->csect = 255;
- if (ofs > 0) {
- bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
- if (ifptr > 0 &&
- (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
- fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
- ofs -= fp->fptr;
- clst = fp->curr_clust;
- } else { /* When seek to back cluster, */
- clst = fp->org_clust; /* start from the first cluster */
-#if !_FS_READONLY
- if (clst == 0) { /* If no cluster chain, create a new chain */
- clst = create_chain(fp->fs, 0);
- if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
- if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
- fp->org_clust = clst;
- }
-#endif
- fp->curr_clust = clst;
- }
- if (clst != 0) {
- while (ofs > bcs) { /* Cluster following loop */
-#if !_FS_READONLY
- if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
- clst = create_chain(fp->fs, clst); /* Force streached if in write mode */
- if (clst == 0) { /* When disk gets full, clip file size */
- ofs = bcs; break;
- }
- } else
-#endif
- clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
- if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
- if (clst <= 1 || clst >= fp->fs->max_clust) ABORT(fp->fs, FR_INT_ERR);
- fp->curr_clust = clst;
- fp->fptr += bcs;
- ofs -= bcs;
- }
- fp->fptr += ofs;
- fp->csect = (BYTE)(ofs / SS(fp->fs)); /* Sector offset in the cluster */
- if (ofs % SS(fp->fs)) {
- nsect = clust2sect(fp->fs, clst); /* Current sector */
- if (!nsect) ABORT(fp->fs, FR_INT_ERR);
- nsect += fp->csect;
- fp->csect++;
- }
- }
- }
- if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {
-#if !_FS_TINY
-#if !_FS_READONLY
- if (fp->flag & FA__DIRTY) { /* Write-back dirty buffer if needed */
- if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
- ABORT(fp->fs, FR_DISK_ERR);
- fp->flag &= ~FA__DIRTY;
- }
-#endif
- if (disk_read(fp->fs->drive, fp->buf, nsect, 1) != RES_OK)
- ABORT(fp->fs, FR_DISK_ERR);
-#endif
- fp->dsect = nsect;
- }
-#if !_FS_READONLY
- if (fp->fptr > fp->fsize) { /* Set changed flag if the file size is extended */
- fp->fsize = fp->fptr;
- fp->flag |= FA__WRITTEN;
- }
-#endif
-
- LEAVE_FF(fp->fs, res);
-}
-
-
-
-
-#if _FS_MINIMIZE <= 1
-/*-----------------------------------------------------------------------*/
-/* Create a Directroy Object */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_opendir (
- eDIR *dj, /* Pointer to directory object to create */
- const XCHAR *path /* Pointer to the directory path */
-)
-{
- FRESULT res;
- NAMEBUF(sfn, lfn);
- BYTE *dir;
-
-
- res = chk_mounted(&path, &dj->fs, 0);
- if (res == FR_OK) {
- INITBUF((*dj), sfn, lfn);
- res = follow_path(dj, path); /* Follow the path to the directory */
- if (res == FR_OK) { /* Follow completed */
- dir = dj->dir;
- if (dir) { /* It is not the root dir */
- if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
- dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
- } else { /* The object is not a directory */
- res = FR_NO_PATH;
- }
- }
- if (res == FR_OK) {
- dj->id = dj->fs->id;
- res = dir_seek(dj, 0); /* Rewind dir */
- }
- }
- if (res == FR_NO_FILE) res = FR_NO_PATH;
- }
-
- LEAVE_FF(dj->fs, res);
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Read Directory Entry in Sequense */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_readdir (
- eDIR *dj, /* Pointer to the open directory object */
- FILINFO *fno /* Pointer to file information to return */
-)
-{
- FRESULT res;
- NAMEBUF(sfn, lfn);
-
-
- res = validate(dj->fs, dj->id); /* Check validity of the object */
- if (res == FR_OK) {
- INITBUF((*dj), sfn, lfn);
- if (!fno) {
- res = dir_seek(dj, 0);
- } else {
- res = dir_read(dj);
- if (res == FR_NO_FILE) {
- dj->sect = 0;
- res = FR_OK;
- }
- if (res == FR_OK) { /* A valid entry is found */
- get_fileinfo(dj, fno); /* Get the object information */
- res = dir_next(dj, FALSE); /* Increment index for next */
- if (res == FR_NO_FILE) {
- dj->sect = 0;
- res = FR_OK;
- }
- }
- }
- }
-
- LEAVE_FF(dj->fs, res);
-}
-
-
-
-#if _FS_MINIMIZE == 0
-/*-----------------------------------------------------------------------*/
-/* Get File Status */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_stat (
- const XCHAR *path, /* Pointer to the file path */
- FILINFO *fno /* Pointer to file information to return */
-)
-{
- FRESULT res;
- eDIR dj;
- NAMEBUF(sfn, lfn);
-
-
- res = chk_mounted(&path, &dj.fs, 0);
- if (res == FR_OK) {
- INITBUF(dj, sfn, lfn);
- res = follow_path(&dj, path); /* Follow the file path */
- if (res == FR_OK) { /* Follwo completed */
- if (dj.dir) /* Found an object */
- get_fileinfo(&dj, fno);
- else /* It is root dir */
- res = FR_INVALID_NAME;
- }
- }
-
- LEAVE_FF(dj.fs, res);
-}
-
-
-
-#if !_FS_READONLY
-/*-----------------------------------------------------------------------*/
-/* Get Number of Free Clusters */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_getfree (
- const XCHAR *path, /* Pointer to the logical drive number (root dir) */
- DWORD *nclst, /* Pointer to the variable to return number of free clusters */
- FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */
-)
-{
- FRESULT res;
- DWORD n, clst, sect, stat;
- UINT i;
- BYTE fat, *p;
-
-
- /* Get drive number */
- res = chk_mounted(&path, fatfs, 0);
- if (res != FR_OK) LEAVE_FF(*fatfs, res);
-
- /* If number of free cluster is valid, return it without cluster scan. */
- if ((*fatfs)->free_clust <= (*fatfs)->max_clust - 2) {
- *nclst = (*fatfs)->free_clust;
- LEAVE_FF(*fatfs, FR_OK);
- }
-
- /* Get number of free clusters */
- fat = (*fatfs)->fs_type;
- n = 0;
- if (fat == FS_FAT12) {
- clst = 2;
- do {
- stat = get_fat(*fatfs, clst);
- if (stat == 0xFFFFFFFF) LEAVE_FF(*fatfs, FR_DISK_ERR);
- if (stat == 1) LEAVE_FF(*fatfs, FR_INT_ERR);
- if (stat == 0) n++;
- } while (++clst < (*fatfs)->max_clust);
- } else {
- clst = (*fatfs)->max_clust;
- sect = (*fatfs)->fatbase;
- i = 0; p = 0;
- do {
- if (!i) {
- res = move_window(*fatfs, sect++);
- if (res != FR_OK)
- LEAVE_FF(*fatfs, res);
- p = (*fatfs)->win;
- i = SS(*fatfs);
- }
- if (fat == FS_FAT16) {
- if (LD_WORD(p) == 0) n++;
- p += 2; i -= 2;
- } else {
- if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
- p += 4; i -= 4;
- }
- } while (--clst);
- }
- (*fatfs)->free_clust = n;
- if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1;
- *nclst = n;
-
- LEAVE_FF(*fatfs, FR_OK);
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Truncate File */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_truncate (
- FIL *fp /* Pointer to the file object */
-)
-{
- FRESULT res;
- DWORD ncl;
-
-
- res = validate(fp->fs, fp->id); /* Check validity of the object */
- if (res != FR_OK) LEAVE_FF(fp->fs, res);
- if (fp->flag & FA__ERROR) /* Check abort flag */
- LEAVE_FF(fp->fs, FR_INT_ERR);
- if (!(fp->flag & FA_WRITE)) /* Check access mode */
- LEAVE_FF(fp->fs, FR_DENIED);
-
- if (fp->fsize > fp->fptr) {
- fp->fsize = fp->fptr; /* Set file size to current R/W point */
- fp->flag |= FA__WRITTEN;
- if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
- res = remove_chain(fp->fs, fp->org_clust);
- fp->org_clust = 0;
- } else { /* When truncate a part of the file, remove remaining clusters */
- ncl = get_fat(fp->fs, fp->curr_clust);
- res = FR_OK;
- if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
- if (ncl == 1) res = FR_INT_ERR;
- if (res == FR_OK && ncl < fp->fs->max_clust) {
- res = put_fat(fp->fs, fp->curr_clust, 0x0FFFFFFF);
- if (res == FR_OK) res = remove_chain(fp->fs, ncl);
- }
- }
- }
- if (res != FR_OK) fp->flag |= FA__ERROR;
-
- LEAVE_FF(fp->fs, res);
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Delete a File or Directory */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_unlink (
- const XCHAR *path /* Pointer to the file or directory path */
-)
-{
- FRESULT res;
- eDIR dj, sdj;
- NAMEBUF(sfn, lfn);
- BYTE *dir;
- DWORD dclst;
-
-
- res = chk_mounted(&path, &dj.fs, 1);
- if (res != FR_OK) LEAVE_FF(dj.fs, res);
-
- INITBUF(dj, sfn, lfn);
- res = follow_path(&dj, path); /* Follow the file path */
- if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
- res = FR_INVALID_NAME;
- if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
-
- dir = dj.dir;
- if (!dir) /* Is it the root directory? */
- LEAVE_FF(dj.fs, FR_INVALID_NAME);
- if (dir[DIR_Attr] & AM_RDO) /* Is it a R/O object? */
- LEAVE_FF(dj.fs, FR_DENIED);
- dclst = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
-
- if (dir[DIR_Attr] & AM_DIR) { /* It is a sub-directory */
- if (dclst < 2) LEAVE_FF(dj.fs, FR_INT_ERR);
- mem_cpy(&sdj, &dj, sizeof(eDIR)); /* Check if the sub-dir is empty or not */
- sdj.sclust = dclst;
- res = dir_seek(&sdj, 2);
- if (res != FR_OK) LEAVE_FF(dj.fs, res);
- res = dir_read(&sdj);
- if (res == FR_OK) res = FR_DENIED; /* Not empty sub-dir */
- if (res != FR_NO_FILE) LEAVE_FF(dj.fs, res);
- }
-
- res = dir_remove(&dj); /* Remove directory entry */
- if (res == FR_OK) {
- if (dclst)
- res = remove_chain(dj.fs, dclst); /* Remove the cluster chain */
- if (res == FR_OK) res = sync(dj.fs);
- }
-
- LEAVE_FF(dj.fs, res);
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Create a Directory */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_mkdir (
- const XCHAR *path /* Pointer to the directory path */
-)
-{
- FRESULT res;
- eDIR dj;
- NAMEBUF(sfn, lfn);
- BYTE *dir, n;
- DWORD dsect, dclst, pclst, tim;
-
-
- res = chk_mounted(&path, &dj.fs, 1);
- if (res != FR_OK) LEAVE_FF(dj.fs, res);
-
- INITBUF(dj, sfn, lfn);
- res = follow_path(&dj, path); /* Follow the file path */
- if (res == FR_OK) res = FR_EXIST; /* Any file or directory is already existing */
- if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
- res = FR_INVALID_NAME;
- if (res != FR_NO_FILE) /* Any error occured */
- LEAVE_FF(dj.fs, res);
-
- dclst = create_chain(dj.fs, 0); /* Allocate a new cluster for new directory table */
- res = FR_OK;
- if (dclst == 0) res = FR_DENIED;
- if (dclst == 1) res = FR_INT_ERR;
- if (dclst == 0xFFFFFFFF) res = FR_DISK_ERR;
- if (res == FR_OK)
- res = move_window(dj.fs, 0);
- if (res != FR_OK) LEAVE_FF(dj.fs, res);
- dsect = clust2sect(dj.fs, dclst);
-
- dir = dj.fs->win; /* Initialize the new directory table */
- mem_set(dir, 0, SS(dj.fs));
- mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */
- dir[DIR_Name] = '.';
- dir[DIR_Attr] = AM_DIR;
- tim = get_fattime();
- ST_DWORD(dir+DIR_WrtTime, tim);
- ST_WORD(dir+DIR_FstClusLO, dclst);
- ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
- mem_cpy(dir+32, dir, 32); /* Create ".." entry */
- dir[33] = '.';
- pclst = dj.sclust;
- if (dj.fs->fs_type == FS_FAT32 && pclst == dj.fs->dirbase)
- pclst = 0;
- ST_WORD(dir+32+DIR_FstClusLO, pclst);
- ST_WORD(dir+32+DIR_FstClusHI, pclst >> 16);
- for (n = 0; n < dj.fs->csize; n++) { /* Write dot entries and clear left sectors */
- dj.fs->winsect = dsect++;
- dj.fs->wflag = 1;
- res = move_window(dj.fs, 0);
- if (res) LEAVE_FF(dj.fs, res);
- mem_set(dir, 0, SS(dj.fs));
- }
-
- res = dir_register(&dj);
- if (res != FR_OK) {
- remove_chain(dj.fs, dclst);
- } else {
- dir = dj.dir;
- dir[DIR_Attr] = AM_DIR; /* Attribute */
- ST_DWORD(dir+DIR_WrtTime, tim); /* Crated time */
- ST_WORD(dir+DIR_FstClusLO, dclst); /* Table start cluster */
- ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
- dj.fs->wflag = 1;
- res = sync(dj.fs);
- }
-
- LEAVE_FF(dj.fs, res);
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Change File Attribute */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_chmod (
- const XCHAR *path, /* Pointer to the file path */
- BYTE value, /* Attribute bits */
- BYTE mask /* Attribute mask to change */
-)
-{
- FRESULT res;
- eDIR dj;
- NAMEBUF(sfn, lfn);
- BYTE *dir;
-
-
- res = chk_mounted(&path, &dj.fs, 1);
- if (res == FR_OK) {
- INITBUF(dj, sfn, lfn);
- res = follow_path(&dj, path); /* Follow the file path */
- if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
- res = FR_INVALID_NAME;
- if (res == FR_OK) {
- dir = dj.dir;
- if (!dir) { /* Is it a root directory? */
- res = FR_INVALID_NAME;
- } else { /* File or sub directory */
- mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
- dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
- dj.fs->wflag = 1;
- res = sync(dj.fs);
- }
- }
- }
-
- LEAVE_FF(dj.fs, res);
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Change Timestamp */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_utime (
- const XCHAR *path, /* Pointer to the file/directory name */
- const FILINFO *fno /* Pointer to the timestamp to be set */
-)
-{
- FRESULT res;
- eDIR dj;
- NAMEBUF(sfn, lfn);
- BYTE *dir;
-
-
- res = chk_mounted(&path, &dj.fs, 1);
- if (res == FR_OK) {
- INITBUF(dj, sfn, lfn);
- res = follow_path(&dj, path); /* Follow the file path */
- if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
- res = FR_INVALID_NAME;
- if (res == FR_OK) {
- dir = dj.dir;
- if (!dir) { /* Root directory */
- res = FR_INVALID_NAME;
- } else { /* File or sub-directory */
- ST_WORD(dir+DIR_WrtTime, fno->ftime);
- ST_WORD(dir+DIR_WrtDate, fno->fdate);
- dj.fs->wflag = 1;
- res = sync(dj.fs);
- }
- }
- }
-
- LEAVE_FF(dj.fs, res);
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Rename File/Directory */
-/*-----------------------------------------------------------------------*/
-
-FRESULT f_rename (
- const XCHAR *path_old, /* Pointer to the old name */
- const XCHAR *path_new /* Pointer to the new name */
-)
-{
- FRESULT res;
- eDIR dj_old, dj_new;
- NAMEBUF(sfn, lfn);
- BYTE buf[21], *dir;
- DWORD dw;
-
-
- INITBUF(dj_old, sfn, lfn);
- res = chk_mounted(&path_old, &dj_old.fs, 1);
- if (res == FR_OK) {
- dj_new.fs = dj_old.fs;
- res = follow_path(&dj_old, path_old); /* Check old object */
- if (_FS_RPATH && res == FR_OK && (dj_old.fn[NS] & NS_DOT))
- res = FR_INVALID_NAME;
- }
- if (res != FR_OK) LEAVE_FF(dj_old.fs, res); /* The old object is not found */
-
- if (!dj_old.dir) LEAVE_FF(dj_old.fs, FR_NO_FILE); /* Is root dir? */
- mem_cpy(buf, dj_old.dir+DIR_Attr, 21); /* Save the object information */
-
- mem_cpy(&dj_new, &dj_old, sizeof(eDIR));
- res = follow_path(&dj_new, path_new); /* Check new object */
- if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
- if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */
- res = dir_register(&dj_new); /* Register the new object */
- if (res == FR_OK) {
- dir = dj_new.dir; /* Copy object information into new entry */
- mem_cpy(dir+13, buf+2, 19);
- dir[DIR_Attr] = buf[0] | AM_ARC;
- dj_old.fs->wflag = 1;
- if (dir[DIR_Attr] & AM_DIR) { /* Update .. entry in the directory if needed */
- dw = clust2sect(dj_new.fs, (DWORD)LD_WORD(dir+DIR_FstClusHI) | LD_WORD(dir+DIR_FstClusLO));
- if (!dw) {
- res = FR_INT_ERR;
- } else {
- res = move_window(dj_new.fs, dw);
- dir = dj_new.fs->win+32;
- if (res == FR_OK && dir[1] == '.') {
- dw = (dj_new.fs->fs_type == FS_FAT32 && dj_new.sclust == dj_new.fs->dirbase) ? 0 : dj_new.sclust;
- ST_WORD(dir+DIR_FstClusLO, dw);
- ST_WORD(dir+DIR_FstClusHI, dw >> 16);
- dj_new.fs->wflag = 1;
- }
- }
- }
- if (res == FR_OK) {
- res = dir_remove(&dj_old); /* Remove old entry */
- if (res == FR_OK)
- res = sync(dj_old.fs);
- }
- }
- }
-
- LEAVE_FF(dj_old.fs, res);
-}
-
-#endif /* !_FS_READONLY */
-#endif /* _FS_MINIMIZE == 0 */
-#endif /* _FS_MINIMIZE <= 1 */
-#endif /* _FS_MINIMIZE <= 2 */
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Forward data to the stream directly (Available on only _FS_TINY cfg) */
-/*-----------------------------------------------------------------------*/
-#if _USE_FORWARD && _FS_TINY
-
-FRESULT f_forward (
- FIL *fp, /* Pointer to the file object */
- UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
- UINT btr, /* Number of bytes to forward */
- UINT *bf /* Pointer to number of bytes forwarded */
-)
-{
- FRESULT res;
- DWORD remain, clst, sect;
- UINT rcnt;
-
-
- *bf = 0;
-
- res = validate(fp->fs, fp->id); /* Check validity of the object */
- if (res != FR_OK) LEAVE_FF(fp->fs, res);
- if (fp->flag & FA__ERROR) /* Check error flag */
- LEAVE_FF(fp->fs, FR_INT_ERR);
- if (!(fp->flag & FA_READ)) /* Check access mode */
- LEAVE_FF(fp->fs, FR_DENIED);
-
- remain = fp->fsize - fp->fptr;
- if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
-
- for ( ; btr && (*func)(NULL, 0); /* Repeat until all data transferred or stream becomes busy */
- fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
- if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
- if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
- clst = (fp->fptr == 0) ? /* On the top of the file? */
- fp->org_clust : get_fat(fp->fs, fp->curr_clust);
- if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
- if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
- fp->curr_clust = clst; /* Update current cluster */
- fp->csect = 0; /* Reset sector address in the cluster */
- }
- fp->csect++; /* Next sector address in the cluster */
- }
- sect = clust2sect(fp->fs, fp->curr_clust); /* Get current data sector */
- if (!sect) ABORT(fp->fs, FR_INT_ERR);
- sect += fp->csect - 1;
- if (move_window(fp->fs, sect)) /* Move sector window */
- ABORT(fp->fs, FR_DISK_ERR);
- fp->dsect = sect;
- rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
- if (rcnt > btr) rcnt = btr;
- rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
- if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
- }
-
- LEAVE_FF(fp->fs, FR_OK);
-}
-#endif /* _USE_FORWARD */
-
-
-
-#if _USE_MKFS && !_FS_READONLY
-/*-----------------------------------------------------------------------*/
-/* Create File System on the Drive */
-/*-----------------------------------------------------------------------*/
-#define N_ROOTDIR 512 /* Multiple of 32 and <= 2048 */
-#define N_FATS 1 /* 1 or 2 */
-#define MAX_SECTOR 131072000UL /* Maximum partition size */
-#define MIN_SECTOR 2000UL /* Minimum partition size */
-
-
-FRESULT f_mkfs (
- BYTE drv, /* Logical drive number */
- BYTE partition, /* Partitioning rule 0:FDISK, 1:SFD */
- WORD allocsize /* Allocation unit size [bytes] */
-)
-{
- static const DWORD sstbl[] = { 2048000, 1024000, 512000, 256000, 128000, 64000, 32000, 16000, 8000, 4000, 0 };
- static const WORD cstbl[] = { 32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512 };
- BYTE fmt, m, *tbl;
- DWORD b_part, b_fat, b_dir, b_data; /* Area offset (LBA) */
- DWORD n_part, n_rsv, n_fat, n_dir; /* Area size */
- DWORD n_clst, d, n;
- WORD as;
- FATFS *fs;
- DSTATUS stat;
-
-
- /* Check validity of the parameters */
- if (drv >= _DRIVES) return FR_INVALID_DRIVE;
- if (partition >= 2) return FR_MKFS_ABORTED;
-
- /* Check mounted drive and clear work area */
- fs = FatFs[drv];
- if (!fs) return FR_NOT_ENABLED;
- fs->fs_type = 0;
- drv = LD2PD(drv);
-
- /* Get disk statics */
- stat = disk_initialize(drv);
- if (stat & STA_NOINIT) return FR_NOT_READY;
- if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
-#if _MAX_SS != 512 /* Get disk sector size */
- if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
- || SS(fs) > _MAX_SS)
- return FR_MKFS_ABORTED;
-#endif
- if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_part) != RES_OK || n_part < MIN_SECTOR)
- return FR_MKFS_ABORTED;
- if (n_part > MAX_SECTOR) n_part = MAX_SECTOR;
- b_part = (!partition) ? 63 : 0; /* Boot sector */
- n_part -= b_part;
- for (d = 512; d <= 32768U && d != allocsize; d <<= 1) ; /* Check validity of the allocation unit size */
- if (d != allocsize) allocsize = 0;
- if (!allocsize) { /* Auto selection of cluster size */
- d = n_part;
- for (as = SS(fs); as > 512U; as >>= 1) d >>= 1;
- for (n = 0; d < sstbl[n]; n++) ;
- allocsize = cstbl[n];
- }
- if (allocsize < SS(fs)) allocsize = SS(fs);
-
- allocsize /= SS(fs); /* Number of sectors per cluster */
-
- /* Pre-compute number of clusters and FAT type */
- n_clst = n_part / allocsize;
- fmt = FS_FAT12;
- if (n_clst >= 0xFF5) fmt = FS_FAT16;
- if (n_clst >= 0xFFF5) fmt = FS_FAT32;
-
- /* Determine offset and size of FAT structure */
- switch (fmt) {
- case FS_FAT12:
- n_fat = ((n_clst * 3 + 1) / 2 + 3 + SS(fs) - 1) / SS(fs);
- n_rsv = 1 + partition;
- n_dir = N_ROOTDIR * 32 / SS(fs);
- break;
- case FS_FAT16:
- n_fat = ((n_clst * 2) + 4 + SS(fs) - 1) / SS(fs);
- n_rsv = 1 + partition;
- n_dir = N_ROOTDIR * 32 / SS(fs);
- break;
- default:
- n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
- n_rsv = 33 - partition;
- n_dir = 0;
- }
- b_fat = b_part + n_rsv; /* FATs start sector */
- b_dir = b_fat + n_fat * N_FATS; /* Directory start sector */
- b_data = b_dir + n_dir; /* Data start sector */
-
- /* Align data start sector to erase block boundary (for flash memory media) */
- if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK) return FR_MKFS_ABORTED;
- n = (b_data + n - 1) & ~(n - 1);
- n_fat += (n - b_data) / N_FATS;
- /* b_dir and b_data are no longer used below */
-
- /* Determine number of cluster and final check of validity of the FAT type */
- n_clst = (n_part - n_rsv - n_fat * N_FATS - n_dir) / allocsize;
- if ( (fmt == FS_FAT16 && n_clst < 0xFF5)
- || (fmt == FS_FAT32 && n_clst < 0xFFF5))
- return FR_MKFS_ABORTED;
-
- /* Create partition table if needed */
- if (!partition) {
- DWORD n_disk = b_part + n_part;
-
- mem_set(fs->win, 0, SS(fs));
- tbl = fs->win+MBR_Table;
- ST_DWORD(tbl, 0x00010180); /* Partition start in CHS */
- if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */
- n_disk = n_disk / 63 / 255;
- tbl[7] = (BYTE)n_disk;
- tbl[6] = (BYTE)((n_disk >> 2) | 63);
- } else {
- ST_WORD(&tbl[6], 0xFFFF);
- }
- tbl[5] = 254;
- if (fmt != FS_FAT32) /* System ID */
- tbl[4] = (n_part < 0x10000) ? 0x04 : 0x06;
- else
- tbl[4] = 0x0c;
- ST_DWORD(tbl+8, 63); /* Partition start in LBA */
- ST_DWORD(tbl+12, n_part); /* Partition size in LBA */
- ST_WORD(tbl+64, 0xAA55); /* Signature */
- if (disk_write(drv, fs->win, 0, 1) != RES_OK)
- return FR_DISK_ERR;
- partition = 0xF8;
- } else {
- partition = 0xF0;
- }
-
- /* Create boot record */
- tbl = fs->win; /* Clear buffer */
- mem_set(tbl, 0, SS(fs));
- ST_DWORD(tbl+BS_jmpBoot, 0x90FEEB); /* Boot code (jmp $, nop) */
- ST_WORD(tbl+BPB_BytsPerSec, SS(fs)); /* Sector size */
- tbl[BPB_SecPerClus] = (BYTE)allocsize; /* Sectors per cluster */
- ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
- tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
- ST_WORD(tbl+BPB_RootEntCnt, SS(fs) / 32 * n_dir); /* Number of rootdir entries */
- if (n_part < 0x10000) { /* Number of total sectors */
- ST_WORD(tbl+BPB_TotSec16, n_part);
- } else {
- ST_DWORD(tbl+BPB_TotSec32, n_part);
- }
- tbl[BPB_Media] = partition; /* Media descripter */
- ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
- ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
- ST_DWORD(tbl+BPB_HiddSec, b_part); /* Hidden sectors */
- n = get_fattime(); /* Use current time as a VSN */
- if (fmt != FS_FAT32) {
- ST_DWORD(tbl+BS_VolID, n); /* Volume serial number */
- ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of secters per FAT */
- tbl[BS_DrvNum] = 0x80; /* Drive number */
- tbl[BS_BootSig] = 0x29; /* Extended boot signature */
- mem_cpy(tbl+BS_VolLab, "NO NAME FAT ", 19); /* Volume lavel, FAT signature */
- } else {
- ST_DWORD(tbl+BS_VolID32, n); /* Volume serial number */
- ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of secters per FAT */
- ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory cluster (2) */
- ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (bs+1) */
- ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (bs+6) */
- tbl[BS_DrvNum32] = 0x80; /* Drive number */
- tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
- mem_cpy(tbl+BS_VolLab32, "NO NAME FAT32 ", 19); /* Volume lavel, FAT signature */
- }
- ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature */
- if (SS(fs) > 512U) {
- ST_WORD(tbl+SS(fs)-2, 0xAA55);
- }
- if (disk_write(drv, tbl, b_part+0, 1) != RES_OK)
- return FR_DISK_ERR;
- if (fmt == FS_FAT32)
- disk_write(drv, tbl, b_part+6, 1);
-
- /* Initialize FAT area */
- for (m = 0; m < N_FATS; m++) {
- mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
- if (fmt != FS_FAT32) {
- n = (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
- n |= partition;
- ST_DWORD(tbl, n); /* Reserve cluster #0-1 (FAT12/16) */
- } else {
- ST_DWORD(tbl+0, 0xFFFFFFF8); /* Reserve cluster #0-1 (FAT32) */
- ST_DWORD(tbl+4, 0xFFFFFFFF);
- ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
- }
- if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
- return FR_DISK_ERR;
- mem_set(tbl, 0, SS(fs)); /* Following FAT entries are filled by zero */
- for (n = 1; n < n_fat; n++) {
- if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
- return FR_DISK_ERR;
- }
- }
-
- /* Initialize Root directory */
- m = (BYTE)((fmt == FS_FAT32) ? allocsize : n_dir);
- do {
- if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
- return FR_DISK_ERR;
- } while (--m);
-
- /* Create FSInfo record if needed */
- if (fmt == FS_FAT32) {
- ST_WORD(tbl+BS_55AA, 0xAA55);
- ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
- ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
- ST_DWORD(tbl+FSI_Free_Count, n_clst - 1);
- ST_DWORD(tbl+FSI_Nxt_Free, 0xFFFFFFFF);
- disk_write(drv, tbl, b_part+1, 1);
- disk_write(drv, tbl, b_part+7, 1);
- }
-
- return (disk_ioctl(drv, CTRL_SYNC, (void*)NULL) == RES_OK) ? FR_OK : FR_DISK_ERR;
-}
-
-#endif /* _USE_MKFS && !_FS_READONLY */
-
-
-
-
-#if _USE_STRFUNC
-/*-----------------------------------------------------------------------*/
-/* Get a string from the file */
-/*-----------------------------------------------------------------------*/
-char* f_gets (
- char* buff, /* Pointer to the string buffer to read */
- int len, /* Size of string buffer */
- FIL* fil /* Pointer to the file object */
-)
-{
- int i = 0;
- char *p = buff;
- UINT rc;
-
-
- while (i < len - 1) { /* Read bytes until buffer gets filled */
- f_read(fil, p, 1, &rc);
- if (rc != 1) break; /* Break when no data to read */
-#if _USE_STRFUNC >= 2
- if (*p == '\r') continue; /* Strip '\r' */
-#endif
- i++;
- if (*p++ == '\n') break; /* Break when reached end of line */
- }
- *p = 0;
- return i ? buff : NULL; /* When no data read (eof or error), return with error. */
-}
-
-
-
-#if !_FS_READONLY
-#include <stdarg.h>
-/*-----------------------------------------------------------------------*/
-/* Put a character to the file */
-/*-----------------------------------------------------------------------*/
-int f_putc (
- int chr, /* A character to be output */
- FIL* fil /* Ponter to the file object */
-)
-{
- UINT bw;
- char c;
-
-
-#if _USE_STRFUNC >= 2
- if (chr == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */
-#endif
- if (!fil) { /* Special value may be used to switch the destination to any other device */
- /* put_console(chr); */
- return chr;
- }
- c = (char)chr;
- f_write(fil, &c, 1, &bw); /* Write a byte to the file */
- return bw ? chr : EOF; /* Return the result */
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Put a string to the file */
-/*-----------------------------------------------------------------------*/
-int f_puts (
- const char* str, /* Pointer to the string to be output */
- FIL* fil /* Pointer to the file object */
-)
-{
- int n;
-
-
- for (n = 0; *str; str++, n++) {
- if (f_putc(*str, fil) == EOF) return EOF;
- }
- return n;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Put a formatted string to the file */
-/*-----------------------------------------------------------------------*/
-int f_printf (
- FIL* fil, /* Pointer to the file object */
- const char* str, /* Pointer to the format string */
- ... /* Optional arguments... */
-)
-{
- va_list arp;
- UCHAR c, f, r;
- ULONG val;
- char s[16];
- int i, w, res, cc;
-
-
- va_start(arp, str);
-
- for (cc = res = 0; cc != EOF; res += cc) {
- c = *str++;
- if (c == 0) break; /* End of string */
- if (c != '%') { /* Non escape cahracter */
- cc = f_putc(c, fil);
- if (cc != EOF) cc = 1;
- continue;
- }
- w = f = 0;
- c = *str++;
- if (c == '0') { /* Flag: '0' padding */
- f = 1; c = *str++;
- }
- while (c >= '0' && c <= '9') { /* Precision */
- w = w * 10 + (c - '0');
- c = *str++;
- }
- if (c == 'l') { /* Prefix: Size is long int */
- f |= 2; c = *str++;
- }
- if (c == 's') { /* Type is string */
- cc = f_puts(va_arg(arp, char*), fil);
- continue;
- }
- if (c == 'c') { /* Type is character */
- cc = f_putc(va_arg(arp, int), fil);
- if (cc != EOF) cc = 1;
- continue;
- }
- r = 0;
- if (c == 'd') r = 10; /* Type is signed decimal */
- if (c == 'u') r = 10; /* Type is unsigned decimal */
- if (c == 'X') r = 16; /* Type is unsigned hexdecimal */
- if (r == 0) break; /* Unknown type */
- if (f & 2) { /* Get the value */
- val = (ULONG)va_arg(arp, long);
- } else {
- val = (c == 'd') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int);
- }
- /* Put numeral string */
- if (c == 'd') {
- if (val & 0x80000000) {
- val = 0 - val;
- f |= 4;
- }
- }
- i = sizeof(s) - 1; s[i] = 0;
- do {
- c = (UCHAR)(val % r + '0');
- if (c > '9') c += 7;
- s[--i] = c;
- val /= r;
- } while (i && val);
- if (i && (f & 4)) s[--i] = '-';
- w = sizeof(s) - 1 - w;
- while (i && i > w) s[--i] = (f & 1) ? '0' : ' ';
- cc = f_puts(&s[i], fil);
- }
-
- va_end(arp);
- return (cc == EOF) ? cc : res;
-}
-
-#endif /* !_FS_READONLY */
-#endif /* _USE_STRFUNC */