PokittoLib with changes to lcd refresh etc.
Fork of Pokitto by
This is a fork by user @Spinal, and is used in Pokittris for testing. Do not import this to your own program.
libpff/pff.cpp
- Committer:
- Pokitto
- Date:
- 2017-09-18
- Revision:
- 0:e8b8f36b4505
- Child:
- 2:968589ca3484
File content as of revision 0:e8b8f36b4505:
/*----------------------------------------------------------------------------/ / Petit FatFs - FAT file system module R0.02 (C)ChaN, 2009 /-----------------------------------------------------------------------------/ / Petit FatFs module is an open source software to implement FAT file system to / small embedded systems. This is a free software and is opened for education, / research and commercial developments under license policy of following trems. / / Copyright (C) 2009, ChaN, all right reserved. / / * The Petit FatFs module is a free software and there is NO WARRANTY. / * No restriction on use. You can use, modify and redistribute it for / personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY. / * Redistributions of source code must retain the above copyright notice. / /-----------------------------------------------------------------------------/ / Jun 15,'09 R0.01a First release. (Branched from FatFs R0.07b.) / / Dec 14,'09 R0.02 Added multiple code page support. / Added write funciton. / Changed stream read mode interface. /----------------------------------------------------------------------------*/ #include "pff.h" /* Petit FatFs configurations and declarations */ #include "diskio.h" /* Declarations of low level disk I/O functions */ /*-------------------------------------------------------------------------- Private Functions ---------------------------------------------------------------------------*/ static FATFS *FatFs; /* Pointer to the file system object (logical drive) */ /*-----------------------------------------------------------------------*/ /* String functions */ /*-----------------------------------------------------------------------*/ /* Fill memory */ static void mem_set (void* dst, int val, int cnt) { char *d = (char*)dst; while (cnt--) *d++ = (char)val; } /* Compare memory to memory */ static int mem_cmp (const void* dst, const void* src, int cnt) { const char *d = (const char *)dst, *s = (const char *)src; int r = 0; while (cnt-- && (r = *d++ - *s++) == 0) ; return r; } /*-----------------------------------------------------------------------*/ /* FAT access - Read value of a FAT entry */ /*-----------------------------------------------------------------------*/ static CLUST get_fat ( /* 1:IO error, Else:Cluster status */ CLUST clst /* Cluster# to get the link information */ ) { WORD wc, bc, ofs; BYTE buf[4]; FATFS *fs = FatFs; if (clst < 2 || clst >= fs->max_clust) /* Range check */ return 1; switch (fs->fs_type) { case FS_FAT12 : bc = (WORD)clst; bc += bc / 2; ofs = bc % 512; bc /= 512; if (ofs != 511) { if (disk_readp(buf, fs->fatbase + bc, ofs, 2)) break; } else { if (disk_readp(buf, fs->fatbase + bc, 511, 1)) break; if (disk_readp(buf+1, fs->fatbase + bc + 1, 0, 1)) break; } wc = LD_WORD(buf); return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); case FS_FAT16 : if (disk_readp(buf, fs->fatbase + clst / 256, (WORD)(((WORD)clst % 256) * 2), 2)) break; return LD_WORD(buf); #if _FS_FAT32 case FS_FAT32 : if (disk_readp(buf, fs->fatbase + clst / 128, (WORD)(((WORD)clst % 128) * 4), 4)) break; return LD_DWORD(buf) & 0x0FFFFFFF; #endif } return 1; /* An error occured at the disk I/O layer */ } /*-----------------------------------------------------------------------*/ /* Get sector# from cluster# */ /*-----------------------------------------------------------------------*/ static DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ CLUST clst /* Cluster# to be converted */ ) { FATFS *fs = FatFs; clst -= 2; if (clst >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */ return (DWORD)clst * fs->csize + fs->database; } /*-----------------------------------------------------------------------*/ /* Directory handling - Rewind directory index */ /*-----------------------------------------------------------------------*/ static FRESULT dir_rewind ( FATDIR *dj /* Pointer to directory object */ ) { CLUST clst; FATFS *fs = FatFs; dj->index = 0; clst = dj->sclust; if (clst == 1 || clst >= fs->max_clust) /* Check start cluster range */ return FR_DISK_ERR; #if _FS_FAT32 if (!clst && fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ clst = fs->dirbase; #endif dj->clust = clst; /* Current cluster */ dj->sect = clst ? clust2sect(clst) : fs->dirbase; /* Current sector */ return FR_OK; /* Seek succeeded */ } /*-----------------------------------------------------------------------*/ /* Directory handling - Move directory index next */ /*-----------------------------------------------------------------------*/ static FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table */ FATDIR *dj /* Pointer to directory object */ ) { CLUST clst; WORD i; FATFS *fs = FatFs; i = dj->index + 1; if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ return FR_NO_FILE; if (!(i & (16-1))) { /* Sector changed? */ dj->sect++; /* Next sector */ if (dj->clust == 0) { /* Static table */ if (i >= fs->n_rootdir) /* Report EOT when end of table */ return FR_NO_FILE; } else { /* Dynamic table */ if (((i / 16) & (fs->csize-1)) == 0) { /* Cluster changed? */ clst = get_fat(dj->clust); /* Get next cluster */ if (clst <= 1) return FR_DISK_ERR; if (clst >= fs->max_clust) /* When it reached end of dynamic table */ return FR_NO_FILE; /* Report EOT */ dj->clust = clst; /* Initialize data for new cluster */ dj->sect = clust2sect(clst); } } } dj->index = i; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Directory handling - Find an object in the directory */ /*-----------------------------------------------------------------------*/ static FRESULT dir_find ( FATDIR *dj /* Pointer to the directory object linked to the file name */ ) { FRESULT res; BYTE c, *dir; res = dir_rewind(dj); /* Rewind directory object */ if (res != FR_OK) return res; dir = FatFs->buf; do { res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */ ? FR_DISK_ERR : FR_OK; if (res != FR_OK) break; c = dir[DIR_Name]; /* First character */ if (c == 0) { res = FR_NO_FILE; /* Reached to end of table */ break; } if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ break; res = dir_next(dj); /* Next entry */ } while (res == FR_OK); return res; } /*-----------------------------------------------------------------------*/ /* Read an object from the directory */ /*-----------------------------------------------------------------------*/ #if _USE_DIR static FRESULT dir_read ( FATDIR *dj /* Pointer to the directory object to store read object name */ ) { FRESULT res; BYTE a, c, *dir; res = FR_NO_FILE; dir = FatFs->buf; while (dj->sect) { res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */ ? FR_DISK_ERR : FR_OK; if (res != FR_OK) break; c = dir[DIR_Name]; if (c == 0) { res = FR_NO_FILE; /* Reached to end of table */ break; } a = dir[DIR_Attr] & AM_MASK; if (c != 0xE5 && c != '.' && !(a & AM_VOL)) /* Is it a valid entry? */ break; res = dir_next(dj); /* Next entry */ if (res != FR_OK) break; } if (res != FR_OK) dj->sect = 0; return res; } #endif /*-----------------------------------------------------------------------*/ /* Pick a segment and create the object name in directory form */ /*-----------------------------------------------------------------------*/ #ifdef _EXCVT static const BYTE cvt[] = _EXCVT; #endif static FRESULT create_name ( FATDIR *dj, /* Pointer to the directory object */ const char **path /* Pointer to pointer to the segment in the path string */ ) { BYTE c, d, ni, si, i, *sfn; const char *p; /* Create file name in directory form */ sfn = dj->fn; mem_set(sfn, ' ', 11); si = i = 0; ni = 8; p = *path; for (;;) { c = p[si++]; if (c <= ' ' || c == '/') break; /* Break on end of segment */ if (c == '.' || i >= ni) { if (ni != 8 || c != '.') break; i = 8; ni = 11; continue; } #ifdef _EXCVT if (c >= 0x80) /* To upper extended char (SBCS) */ c = cvt[c - 0x80]; #endif if (IsDBCS1(c) && i >= ni - 1) { /* DBC 1st byte? */ d = p[si++]; /* Get 2nd byte */ sfn[i++] = c; sfn[i++] = d; } else { /* Single byte code */ if (IsLower(c)) c -= 0x20; /* toupper */ sfn[i++] = c; } } *path = &p[si]; /* Rerurn pointer to the next segment */ sfn[11] = (c <= ' ') ? 1 : 0; /* Set last segment flag if end of path */ return FR_OK; } /*-----------------------------------------------------------------------*/ /* Get file information from directory entry */ /*-----------------------------------------------------------------------*/ #if _USE_DIR static void get_fileinfo ( /* No return code */ FATDIR *dj, /* Pointer to the directory object */ FILINFO *fno /* Pointer to store the file information */ ) { BYTE i, c, *dir; char *p; p = fno->fname; if (dj->sect) { dir = FatFs->buf; for (i = 0; i < 8; i++) { /* Copy file name body */ c = dir[i]; if (c == ' ') break; if (c == 0x05) c = 0xE5; *p++ = c; } if (dir[8] != ' ') { /* Copy file name extension */ *p++ = '.'; for (i = 8; i < 11; i++) { c = dir[i]; if (c == ' ') break; *p++ = c; } } fno->fattrib = dir[DIR_Attr]; /* Attribute */ fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ } *p = 0; } #endif /* _USE_DIR */ /*-----------------------------------------------------------------------*/ /* Follow a file path */ /*-----------------------------------------------------------------------*/ static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ FATDIR *dj, /* Directory object to return last directory and found object */ const char *path /* Full-path string to find a file or directory */ ) { FRESULT res; BYTE *dir; while (*path == ' ') path++; /* Skip leading spaces */ if (*path == '/') path++; /* Strip heading separator */ dj->sclust = 0; /* Set start directory (always root dir) */ if ((BYTE)*path <= ' ') { /* Null path means the root directory */ res = dir_rewind(dj); FatFs->buf[0] = 0; } else { /* Follow path */ for (;;) { res = create_name(dj, &path); /* Get a segment */ if (res != FR_OK) break; res = dir_find(dj); /* Find it */ if (res != FR_OK) { /* Could not find the object */ if (res == FR_NO_FILE && !*(dj->fn+11)) res = FR_NO_PATH; break; } if (*(dj->fn+11)) break; /* Last segment match. Function completed. */ dir = FatFs->buf; /* There is next segment. Follow the sub directory */ if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */ res = FR_NO_PATH; break; } dj->sclust = #if _FS_FAT32 ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | #endif LD_WORD(dir+DIR_FstClusLO); } } return res; } /*-----------------------------------------------------------------------*/ /* Check a sector if it is an FAT boot record */ /*-----------------------------------------------------------------------*/ static __attribute__((section(".SD_Code"))) BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */ BYTE *buf, /* Working buffer */ DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ ) { if (disk_readp(buf, sect, 510, 2)) /* Read the boot sector */ return 3; if (LD_WORD(buf) != 0xAA55) /* Check record signature */ return 2; if (!disk_readp(buf, sect, BS_FilSysType, 2) && LD_WORD(buf) == 0x4146) /* Check FAT12/16 */ return 0; #if _FS_FAT32 if (!disk_readp(buf, sect, BS_FilSysType32, 2) && LD_WORD(buf) == 0x4146) /* Check FAT32 */ return 0; #endif return 1; } /*-------------------------------------------------------------------------- Public Functions --------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/ /* Mount/Unmount a Locical Drive */ /*-----------------------------------------------------------------------*/ __attribute__((section(".SD_Code"))) FRESULT pf_mount ( FATFS *fs /* Pointer to new file system object (NULL: Unmount) */ ) { BYTE fmt, buf[36]; DWORD bsect, fsize, tsect, mclst; FatFs = 0; if (!fs) return FR_OK; /* Unregister fs object */ if (disk_initialize() & STA_NOINIT) /* Check if the drive is ready or not */ return FR_NOT_READY; /* Search FAT partition on the drive */ bsect = 0; fmt = check_fs(buf, bsect); /* Check sector 0 as an SFD format */ if (fmt == 1) { /* Not an FAT boot record, it may be FDISK format */ /* Check a partition listed in top of the partition table */ if (disk_readp(buf, bsect, MBR_Table, 16)) { /* 1st partition entry */ fmt = 3; } else { if (buf[4]) { /* Is the partition existing? */ bsect = LD_DWORD(&buf[8]); /* Partition offset in LBA */ fmt = check_fs(buf, bsect); /* Check the partition */ } } } if (fmt == 3) return FR_DISK_ERR; if (fmt) return FR_NO_FILESYSTEM; /* No valid FAT patition is found */ /* Initialize the file system object */ if (disk_readp(buf, bsect, 13, sizeof(buf))) return FR_DISK_ERR; fsize = LD_WORD(buf+BPB_FATSz16-13); /* Number of sectors per FAT */ if (!fsize) fsize = LD_DWORD(buf+BPB_FATSz32-13); fsize *= buf[BPB_NumFATs-13]; /* Number of sectors in FAT area */ fs->fatbase = bsect + LD_WORD(buf+BPB_RsvdSecCnt-13); /* FAT start sector (lba) */ fs->csize = buf[BPB_SecPerClus-13]; /* Number of sectors per cluster */ fs->n_rootdir = LD_WORD(buf+BPB_RootEntCnt-13); /* Nmuber of root directory entries */ tsect = LD_WORD(buf+BPB_TotSec16-13); /* Number of sectors on the file system */ if (!tsect) tsect = LD_DWORD(buf+BPB_TotSec32-13); mclst = (tsect /* Last cluster# + 1 */ - LD_WORD(buf+BPB_RsvdSecCnt-13) - fsize - fs->n_rootdir / 16 ) / fs->csize + 2; fs->max_clust = (CLUST)mclst; fmt = FS_FAT12; /* Determine the FAT sub type */ if (mclst >= 0xFF7) fmt = FS_FAT16; /* Number of clusters >= 0xFF5 */ if (mclst >= 0xFFF7) /* Number of clusters >= 0xFFF5 */ #if _FS_FAT32 fmt = FS_FAT32; #else return FR_NO_FILESYSTEM; #endif fs->fs_type = fmt; /* FAT sub-type */ #if _FS_FAT32 if (fmt == FS_FAT32) fs->dirbase = LD_DWORD(buf+(BPB_RootClus-13)); /* Root directory start cluster */ else #endif fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */ fs->database = fs->fatbase + fsize + fs->n_rootdir / 16; /* Data start sector (lba) */ fs->flag = 0; FatFs = fs; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Open or Create a File */ /*-----------------------------------------------------------------------*/ FRESULT pf_open ( const char *path /* Pointer to the file name */ ) { FRESULT res; FATDIR dj; BYTE sp[12], dir[32]; FATFS *fs = FatFs; if (!fs) /* Check file system */ return FR_NOT_ENABLED; fs->flag = 0; fs->buf = dir; dj.fn = sp; res = follow_path(&dj, path); /* Follow the file path */ if (res != FR_OK) return res; /* Follow failed */ if (!dir[0] || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */ return FR_NO_FILE; fs->org_clust = /* File start cluster */ #if _FS_FAT32 ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | #endif LD_WORD(dir+DIR_FstClusLO); fs->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ fs->fptr = 0; /* File pointer */ fs->flag = FA_OPENED; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Read File */ /*-----------------------------------------------------------------------*/ #if _USE_READ FRESULT pf_read ( void* buff, /* Pointer to the read buffer (NULL:Forward data to the stream)*/ WORD btr, /* Number of bytes to read */ WORD* br /* Pointer to number of bytes read */ ) { DRESULT dr; CLUST clst; DWORD sect, remain; BYTE *rbuff = (BYTE *)buff; WORD rcnt; FATFS *fs = FatFs; *br = 0; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) /* Check if opened */ return FR_NOT_OPENED; remain = fs->fsize - fs->fptr; if (btr > remain) btr = (WORD)remain; /* Truncate btr by remaining bytes */ while (btr) { /* Repeat until all data transferred */ if ((fs->fptr % 512) == 0) { /* On the sector boundary? */ if ((fs->fptr / 512 % fs->csize) == 0) { /* On the cluster boundary? */ clst = (fs->fptr == 0) ? /* On the top of the file? */ fs->org_clust : get_fat(fs->curr_clust); if (clst <= 1) goto fr_abort; fs->curr_clust = clst; /* Update current cluster */ fs->csect = 0; /* Reset sector offset in the cluster */ } sect = clust2sect(fs->curr_clust); /* Get current sector */ if (!sect) goto fr_abort; fs->dsect = sect + fs->csect++; } rcnt = 512 - ((WORD)fs->fptr % 512); /* Get partial sector data from sector buffer */ if (rcnt > btr) rcnt = btr; dr = disk_readp(!buff ? 0 : rbuff, fs->dsect, (WORD)(fs->fptr % 512), rcnt); if (dr) goto fr_abort; fs->fptr += rcnt; rbuff += rcnt; /* Update pointers and counters */ btr -= rcnt; *br += rcnt; } return FR_OK; fr_abort: fs->flag = 0; return FR_DISK_ERR; } #endif /*-----------------------------------------------------------------------*/ /* Write File */ /*-----------------------------------------------------------------------*/ #if _USE_WRITE FRESULT pf_write ( const void* buff, /* Pointer to the data to be written */ WORD btw, /* Number of bytes to write (0:Finalize the current write operation) */ WORD* bw /* Pointer to number of bytes written */ ) { CLUST clst; DWORD sect, remain; const BYTE *p = (const BYTE *)buff; WORD wcnt; FATFS *fs = FatFs; *bw = 0; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) /* Check if opened */ return FR_NOT_OPENED; if (!btw) { /* Finalize request */ if ((fs->flag & FA__WIP) && disk_writep(0, 0)) goto fw_abort; fs->flag &= ~FA__WIP; return FR_OK; } else { /* Write data request */ if (!(fs->flag & FA__WIP)) /* Round down fptr to the sector boundary */ fs->fptr &= 0xFFFFFE00; } remain = fs->fsize - fs->fptr; if (btw > remain) btw = (WORD)remain; /* Truncate btw by remaining bytes */ while (btw) { /* Repeat until all data transferred */ if (((WORD)fs->fptr % 512) == 0) { /* On the sector boundary? */ if ((fs->fptr / 512 % fs->csize) == 0) { /* On the cluster boundary? */ clst = (fs->fptr == 0) ? /* On the top of the file? */ fs->org_clust : get_fat(fs->curr_clust); if (clst <= 1) goto fw_abort; fs->curr_clust = clst; /* Update current cluster */ fs->csect = 0; /* Reset sector offset in the cluster */ } sect = clust2sect(fs->curr_clust); /* Get current sector */ if (!sect) goto fw_abort; fs->dsect = sect + fs->csect++; if (disk_writep(0, fs->dsect)) goto fw_abort; /* Initiate a sector write operation */ fs->flag |= FA__WIP; } wcnt = 512 - ((WORD)fs->fptr % 512); /* Number of bytes to write to the sector */ if (wcnt > btw) wcnt = btw; if (disk_writep(p, wcnt)) goto fw_abort; /* Send data to the sector */ fs->fptr += wcnt; p += wcnt; /* Update pointers and counters */ btw -= wcnt; *bw += wcnt; if (((WORD)fs->fptr % 512) == 0) { if (disk_writep(0, 0)) goto fw_abort; /* Finalize the currtent secter write operation */ fs->flag &= ~FA__WIP; } } return FR_OK; fw_abort: fs->flag = 0; return FR_DISK_ERR; } #endif /*-----------------------------------------------------------------------*/ /* Seek File R/W Pointer */ /*-----------------------------------------------------------------------*/ #if _USE_LSEEK FRESULT pf_lseek ( DWORD ofs /* File pointer from top of file */ ) { CLUST clst; DWORD bcs, sect, ifptr; FATFS *fs = FatFs; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) /* Check if opened */ return FR_NOT_OPENED; if (ofs > fs->fsize) ofs = fs->fsize; /* Clip offset with the file size */ ifptr = fs->fptr; fs->fptr = 0; if (ofs > 0) { bcs = (DWORD)fs->csize * 512; /* Cluster size (byte) */ if (ifptr > 0 && (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ fs->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ ofs -= fs->fptr; clst = fs->curr_clust; } else { /* When seek to back cluster, */ clst = fs->org_clust; /* start from the first cluster */ fs->curr_clust = clst; } while (ofs > bcs) { /* Cluster following loop */ clst = get_fat(clst); /* Follow cluster chain */ if (clst <= 1 || clst >= fs->max_clust) goto fe_abort; fs->curr_clust = clst; fs->fptr += bcs; ofs -= bcs; } fs->fptr += ofs; sect = clust2sect(clst); /* Current sector */ if (!sect) goto fe_abort; fs->csect = (BYTE)(ofs / 512); /* Sector offset in the cluster */ if (ofs % 512) fs->dsect = sect + fs->csect++; } return FR_OK; fe_abort: fs->flag = 0; return FR_DISK_ERR; } #endif /*-----------------------------------------------------------------------*/ /* Create a Directroy Object */ /*-----------------------------------------------------------------------*/ #if _USE_DIR FRESULT pf_opendir ( FATDIR *dj, /* Pointer to directory object to create */ const char *path /* Pointer to the directory path */ ) { FRESULT res; BYTE sp[12], dir[32]; FATFS *fs = FatFs; if (!fs) { /* Check file system */ res = FR_NOT_ENABLED; } else { fs->buf = dir; dj->fn = sp; res = follow_path(dj, path); /* Follow the path to the directory */ if (res == FR_OK) { /* Follow completed */ if (dir[0]) { /* It is not the root dir */ if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */ dj->sclust = #if _FS_FAT32 ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | #endif LD_WORD(dir+DIR_FstClusLO); } else { /* The object is not a directory */ res = FR_NO_PATH; } } if (res == FR_OK) res = dir_rewind(dj); /* Rewind dir */ } if (res == FR_NO_FILE) res = FR_NO_PATH; } return res; } /*-----------------------------------------------------------------------*/ /* Read Directory Entry in Sequense */ /*-----------------------------------------------------------------------*/ FRESULT pf_readdir ( FATDIR *dj, /* Pointer to the open directory object */ FILINFO *fno /* Pointer to file information to return */ ) { FRESULT res; BYTE sp[12], dir[32]; FATFS *fs = FatFs; if (!fs) { /* Check file system */ res = FR_NOT_ENABLED; } else { fs->buf = dir; dj->fn = sp; if (!fno) { res = dir_rewind(dj); } else { res = dir_read(dj); if (res == FR_NO_FILE) { dj->sect = 0; res = FR_OK; } if (res == FR_OK) { /* A valid entry is found */ get_fileinfo(dj, fno); /* Get the object information */ res = dir_next(dj); /* Increment index for next */ if (res == FR_NO_FILE) { dj->sect = 0; res = FR_OK; } } } } return res; } #endif /* _USE_DIR */