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