mirror of
https://github.com/mfulz/qmk_firmware.git
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3554 lines
106 KiB
C
3554 lines
106 KiB
C
/*----------------------------------------------------------------------------/
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/ FatFs - FAT file system module R0.08 (C)ChaN, 2010
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/-----------------------------------------------------------------------------/
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/ FatFs module is a generic FAT file system module for small embedded systems.
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/ This is a free software that opened for education, research and commercial
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/ developments under license policy of following terms.
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/
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/ Copyright (C) 2010, ChaN, all right reserved.
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/
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/ * The FatFs module is a free software and there is NO WARRANTY.
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/ * No restriction on use. You can use, modify and redistribute it for
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/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
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/ * Redistributions of source code must retain the above copyright notice.
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/
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/-----------------------------------------------------------------------------/
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/ Feb 26,'06 R0.00 Prototype.
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/
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/ Apr 29,'06 R0.01 First stable version.
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/
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/ Jun 01,'06 R0.02 Added FAT12 support.
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/ Removed unbuffered mode.
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/ Fixed a problem on small (<32M) partition.
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/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
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/
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/ Sep 22,'06 R0.03 Added f_rename().
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/ Changed option _FS_MINIMUM to _FS_MINIMIZE.
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/ Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
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/ Fixed f_mkdir() creates incorrect directory on FAT32.
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/
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/ Feb 04,'07 R0.04 Supported multiple drive system.
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/ Changed some interfaces for multiple drive system.
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/ Changed f_mountdrv() to f_mount().
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/ Added f_mkfs().
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/ Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
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/ Added a capability of extending file size to f_lseek().
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/ Added minimization level 3.
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/ Fixed an endian sensitive code in f_mkfs().
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/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
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/ Added FSInfo support.
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/ Fixed DBCS name can result FR_INVALID_NAME.
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/ Fixed short seek (<= csize) collapses the file object.
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/
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/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
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/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
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/ Fixed f_mkdir() on FAT32 creates incorrect directory.
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/ Feb 03,'08 R0.05a Added f_truncate() and f_utime().
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/ Fixed off by one error at FAT sub-type determination.
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/ Fixed btr in f_read() can be mistruncated.
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/ Fixed cached sector is not flushed when create and close
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/ without write.
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/
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/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
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/ Improved performance of f_lseek() on moving to the same
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/ or following cluster.
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/
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/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a buffer configuration option.
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/ Added long file name support.
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/ Added multiple code page support.
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/ Added re-entrancy for multitask operation.
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/ Added auto cluster size selection to f_mkfs().
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/ Added rewind option to f_readdir().
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/ Changed result code of critical errors.
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/ Renamed string functions to avoid name collision.
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/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
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/ Added multiple sector size support.
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/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
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/ Fixed wrong cache control in f_lseek().
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/ Added relative path feature.
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/ Added f_chdir() and f_chdrive().
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/ Added proper case conversion to extended char.
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/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
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/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
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/ Fixed name matching error on the 13 char boundary.
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/ Added a configuration option, _LFN_UNICODE.
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/ Changed f_readdir() to return the SFN with always upper
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/ case on non-LFN cfg.
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/
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/ May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN)
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/ Added file lock feature. (_FS_SHARE)
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/ Added fast seek feature. (_USE_FASTSEEK)
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/ Changed some types on the API, XCHAR->TCHAR.
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/ Changed fname member in the FILINFO structure on Unicode cfg.
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/ String functions support UTF-8 encoding files on Unicode cfg.
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/---------------------------------------------------------------------------*/
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#include "ff.h" /* FatFs configurations and declarations */
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#include "diskio.h" /* Declarations of low level disk I/O functions */
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/*--------------------------------------------------------------------------
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Module Private Definitions
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---------------------------------------------------------------------------*/
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#if _FATFS != 8085
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#error Wrong include file (ff.h).
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#endif
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/* FAT sub-type boundaries */
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/* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
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#define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */
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#define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */
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/* Definitions corresponds to multiple sector size */
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#if _MAX_SS == 512 /* Single sector size */
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#define SS(fs) 512U
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#elif _MAX_SS == 1024 || _MAX_SS == 2048 || _MAX_SS == 4096 /* Multiple sector size */
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#define SS(fs) ((fs)->ssize)
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#else
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#error Wrong sector size.
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#endif
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/* Re-entrancy related */
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#if _FS_REENTRANT
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#if _USE_LFN == 1
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#error Static LFN work area must not be used in re-entrant configuration.
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#endif
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#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
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#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
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#else
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#define ENTER_FF(fs)
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#define LEAVE_FF(fs, res) return res
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#endif
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#define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
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/* Character code support macros */
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#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
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#define IsLower(c) (((c)>='a')&&((c)<='z'))
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#define IsDigit(c) (((c)>='0')&&((c)<='9'))
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#if _DF1S /* Code page is DBCS */
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#ifdef _DF2S /* Two 1st byte areas */
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#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
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#else /* One 1st byte area */
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#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
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#endif
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#ifdef _DS3S /* Three 2nd byte areas */
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#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
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#else /* Two 2nd byte areas */
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#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
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#endif
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#else /* Code page is SBCS */
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#define IsDBCS1(c) 0
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#define IsDBCS2(c) 0
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#endif /* _DF1S */
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/* Name status flags */
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#define NS 11 /* Offset of name status byte */
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#define NS_LOSS 0x01 /* Out of 8.3 format */
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#define NS_LFN 0x02 /* Force to create LFN entry */
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#define NS_LAST 0x04 /* Last segment */
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#define NS_BODY 0x08 /* Lower case flag (body) */
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#define NS_EXT 0x10 /* Lower case flag (ext) */
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#define NS_DOT 0x20 /* Dot entry */
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/*------------------------------------------------------------*/
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/* Work area */
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#if !_DRIVES
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#error Number of drives must not be 0.
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#endif
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static
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WORD Fsid; /* File system mount ID */
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static
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FATFS *FatFs[_DRIVES]; /* Pointer to the file system objects (logical drives) */
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#if _FS_RPATH
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static
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BYTE Drive; /* Current drive */
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#endif
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#if _USE_LFN == 0 /* No LFN */
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#define DEF_NAMEBUF BYTE sfn[12]
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#define INIT_BUF(dobj) (dobj).fn = sfn
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#define FREE_BUF()
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#elif _USE_LFN == 1 /* LFN with static LFN working buffer */
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static WCHAR LfnBuf[_MAX_LFN + 1];
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#define DEF_NAMEBUF BYTE sfn[12]
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#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
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#define FREE_BUF()
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#elif _USE_LFN == 2 /* LFN with dynamic LFN working buffer on the stack */
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#define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN + 1]
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#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
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#define FREE_BUF()
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#elif _USE_LFN == 3 /* LFN with dynamic LFN working buffer on the heap */
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#define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn
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#define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
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if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
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(dobj).lfn = lfn; (dobj).fn = sfn; }
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#define FREE_BUF() ff_memfree(lfn)
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#else
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#error Wrong LFN configuration.
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#endif
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/*--------------------------------------------------------------------------
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Module Private Functions
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---------------------------------------------------------------------------*/
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/*-----------------------------------------------------------------------*/
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/* String functions */
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/*-----------------------------------------------------------------------*/
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/* Copy memory to memory */
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static
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void mem_cpy (void* dst, const void* src, int cnt) {
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BYTE *d = (BYTE*)dst;
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const BYTE *s = (const BYTE*)src;
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#if _WORD_ACCESS == 1
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while (cnt >= sizeof(int)) {
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*(int*)d = *(int*)s;
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d += sizeof(int); s += sizeof(int);
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cnt -= sizeof(int);
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}
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#endif
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while (cnt--)
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*d++ = *s++;
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}
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/* Fill memory */
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static
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void mem_set (void* dst, int val, int cnt) {
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BYTE *d = (BYTE*)dst;
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while (cnt--)
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*d++ = (BYTE)val;
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}
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/* Compare memory to memory */
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static
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int mem_cmp (const void* dst, const void* src, int cnt) {
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const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
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int r = 0;
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while (cnt-- && (r = *d++ - *s++) == 0) ;
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return r;
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}
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/* Check if chr is contained in the string */
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static
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int chk_chr (const char* str, int chr) {
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while (*str && *str != chr) str++;
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return *str;
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}
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/*-----------------------------------------------------------------------*/
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/* Request/Release grant to access the volume */
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/*-----------------------------------------------------------------------*/
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#if _FS_REENTRANT
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static
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int lock_fs (
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FATFS *fs /* File system object */
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)
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{
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return ff_req_grant(fs->sobj);
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}
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static
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void unlock_fs (
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FATFS *fs, /* File system object */
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FRESULT res /* Result code to be returned */
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)
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{
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if (res != FR_NOT_ENABLED &&
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res != FR_INVALID_DRIVE &&
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res != FR_INVALID_OBJECT &&
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res != FR_TIMEOUT) {
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ff_rel_grant(fs->sobj);
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}
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}
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#endif
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/*-----------------------------------------------------------------------*/
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/* File sharing control functions */
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/*-----------------------------------------------------------------------*/
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#if _FS_SHARE
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static
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FRESULT chk_lock ( /* Check if the file can be accessed */
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DIR* dj, /* Directory object pointing the file to be checked */
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int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
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)
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{
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UINT i, be;
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/* Search file semaphore table */
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for (i = be = 0; i < _FS_SHARE; i++) {
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if (dj->fs->flsem[i].ctr) { /* Existing entry */
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if (dj->fs->flsem[i].clu == dj->sclust && /* The file is found (identified with its location) */
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dj->fs->flsem[i].idx == dj->index) break;
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} else { /* Blank entry */
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be++;
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}
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}
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if (i == _FS_SHARE) /* The file has not been opened */
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return (be || acc != 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */
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/* The file has been opened. Reject any open against writing file and all write mode open */
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return (acc || dj->fs->flsem[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
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}
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static
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int enq_lock ( /* Check if an entry is available for a new file */
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FATFS* fs /* File system object */
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)
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{
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UINT i;
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for (i = 0; i < _FS_SHARE && fs->flsem[i].ctr; i++) ;
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return (i == _FS_SHARE) ? 0 : 1;
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}
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static
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UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */
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DIR* dj, /* Directory object pointing the file to register or increment */
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int acc /* Desired access mode (0:Read, !0:Write) */
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)
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{
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UINT i;
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for (i = 0; i < _FS_SHARE; i++) { /* Find the file */
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if (dj->fs->flsem[i].ctr &&
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dj->fs->flsem[i].clu == dj->sclust &&
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dj->fs->flsem[i].idx == dj->index) break;
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}
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if (i == _FS_SHARE) { /* Not opened. Register it as new. */
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for (i = 0; i < _FS_SHARE && dj->fs->flsem[i].ctr; i++) ;
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if (i == _FS_SHARE) return 0; /* No space to register (int err) */
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dj->fs->flsem[i].clu = dj->sclust;
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dj->fs->flsem[i].idx = dj->index;
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}
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if (acc && dj->fs->flsem[i].ctr) return 0; /* Access violation (int err) */
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dj->fs->flsem[i].ctr = acc ? 0x100 : dj->fs->flsem[i].ctr + 1; /* Set semaphore value */
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return i + 1;
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}
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static
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FRESULT dec_lock ( /* Decrement file open counter */
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FATFS* fs, /* File system object */
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UINT i /* Semaphore index */
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)
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{
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WORD n;
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FRESULT res;
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if (--i < _FS_SHARE) {
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n = fs->flsem[i].ctr;
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if (n >= 0x100) n = 0;
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if (n) n--;
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fs->flsem[i].ctr = n;
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res = FR_OK;
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} else {
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res = FR_INT_ERR;
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}
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return res;
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}
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#endif
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/*-----------------------------------------------------------------------*/
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/* Change window offset */
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/*-----------------------------------------------------------------------*/
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static
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FRESULT move_window (
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FATFS *fs, /* File system object */
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DWORD sector /* Sector number to make appearance in the fs->win[] */
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) /* Move to zero only writes back dirty window */
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{
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DWORD wsect;
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wsect = fs->winsect;
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if (wsect != sector) { /* Changed current window */
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#if !_FS_READONLY
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if (fs->wflag) { /* Write back dirty window if needed */
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if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
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return FR_DISK_ERR;
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fs->wflag = 0;
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if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */
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BYTE nf;
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for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */
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wsect += fs->fsize;
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disk_write(fs->drv, fs->win, wsect, 1);
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}
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}
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}
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#endif
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if (sector) {
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if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
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return FR_DISK_ERR;
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fs->winsect = sector;
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}
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}
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return FR_OK;
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}
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/*-----------------------------------------------------------------------*/
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/* Clean-up cached data */
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/*-----------------------------------------------------------------------*/
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#if !_FS_READONLY
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static
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FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */
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FATFS *fs /* File system object */
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)
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{
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FRESULT res;
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res = move_window(fs, 0);
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if (res == FR_OK) {
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/* Update FSInfo sector if needed */
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if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
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fs->winsect = 0;
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mem_set(fs->win, 0, 512);
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ST_WORD(fs->win+BS_55AA, 0xAA55);
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ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
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ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
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ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
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ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
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disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
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fs->fsi_flag = 0;
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}
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/* Make sure that no pending write process in the physical drive */
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if (disk_ioctl(fs->drv, CTRL_SYNC, (void*)0) != RES_OK)
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res = FR_DISK_ERR;
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}
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return res;
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}
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#endif
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/*-----------------------------------------------------------------------*/
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/* FAT access - Read value of a FAT entry */
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/*-----------------------------------------------------------------------*/
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DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
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FATFS *fs, /* File system object */
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DWORD clst /* Cluster# to get the link information */
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)
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{
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UINT wc, bc;
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BYTE *p;
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if (clst < 2 || clst >= fs->n_fatent) /* Check range */
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return 1;
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switch (fs->fs_type) {
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case FS_FAT12 :
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bc = (UINT)clst; bc += bc / 2;
|
|
if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
|
|
wc = fs->win[bc % SS(fs)]; bc++;
|
|
if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
|
|
wc |= fs->win[bc % SS(fs)] << 8;
|
|
return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
|
|
|
|
case FS_FAT16 :
|
|
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
|
|
p = &fs->win[clst * 2 % SS(fs)];
|
|
return LD_WORD(p);
|
|
|
|
case FS_FAT32 :
|
|
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
|
|
p = &fs->win[clst * 4 % SS(fs)];
|
|
return LD_DWORD(p) & 0x0FFFFFFF;
|
|
}
|
|
|
|
return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT access - Change value of a FAT entry */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if !_FS_READONLY
|
|
|
|
FRESULT put_fat (
|
|
FATFS *fs, /* File system object */
|
|
DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
|
|
DWORD val /* New value to mark the cluster */
|
|
)
|
|
{
|
|
UINT bc;
|
|
BYTE *p;
|
|
FRESULT res;
|
|
|
|
|
|
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
|
|
res = FR_INT_ERR;
|
|
|
|
} else {
|
|
switch (fs->fs_type) {
|
|
case FS_FAT12 :
|
|
bc = clst; bc += bc / 2;
|
|
res = move_window(fs, fs->fatbase + (bc / SS(fs)));
|
|
if (res != FR_OK) break;
|
|
p = &fs->win[bc % SS(fs)];
|
|
*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
|
|
bc++;
|
|
fs->wflag = 1;
|
|
res = move_window(fs, fs->fatbase + (bc / SS(fs)));
|
|
if (res != FR_OK) break;
|
|
p = &fs->win[bc % SS(fs)];
|
|
*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
|
|
break;
|
|
|
|
case FS_FAT16 :
|
|
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
|
|
if (res != FR_OK) break;
|
|
p = &fs->win[clst * 2 % SS(fs)];
|
|
ST_WORD(p, (WORD)val);
|
|
break;
|
|
|
|
case FS_FAT32 :
|
|
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
|
|
if (res != FR_OK) break;
|
|
p = &fs->win[clst * 4 % SS(fs)];
|
|
val |= LD_DWORD(p) & 0xF0000000;
|
|
ST_DWORD(p, val);
|
|
break;
|
|
|
|
default :
|
|
res = FR_INT_ERR;
|
|
}
|
|
fs->wflag = 1;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
#endif /* !_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT handling - Remove a cluster chain */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if !_FS_READONLY
|
|
static
|
|
FRESULT remove_chain (
|
|
FATFS *fs, /* File system object */
|
|
DWORD clst /* Cluster# to remove a chain from */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DWORD nxt;
|
|
|
|
|
|
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
|
|
res = FR_INT_ERR;
|
|
|
|
} else {
|
|
res = FR_OK;
|
|
while (clst < fs->n_fatent) { /* Not a last link? */
|
|
nxt = get_fat(fs, clst); /* Get cluster status */
|
|
if (nxt == 0) break; /* Empty cluster? */
|
|
if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
|
|
if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
|
|
res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
|
|
if (res != FR_OK) break;
|
|
if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
|
|
fs->free_clust++;
|
|
fs->fsi_flag = 1;
|
|
}
|
|
clst = nxt; /* Next cluster */
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT handling - Stretch or Create a cluster chain */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if !_FS_READONLY
|
|
static
|
|
DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
|
|
FATFS *fs, /* File system object */
|
|
DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
|
|
)
|
|
{
|
|
DWORD cs, ncl, scl;
|
|
|
|
|
|
if (clst == 0) { /* Create a new chain */
|
|
scl = fs->last_clust; /* Get suggested start point */
|
|
if (!scl || scl >= fs->n_fatent) scl = 1;
|
|
}
|
|
else { /* Stretch the current chain */
|
|
cs = get_fat(fs, clst); /* Check the cluster status */
|
|
if (cs < 2) return 1; /* It is an invalid cluster */
|
|
if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
|
|
scl = clst;
|
|
}
|
|
|
|
ncl = scl; /* Start cluster */
|
|
for (;;) {
|
|
ncl++; /* Next cluster */
|
|
if (ncl >= fs->n_fatent) { /* Wrap around */
|
|
ncl = 2;
|
|
if (ncl > scl) return 0; /* No free cluster */
|
|
}
|
|
cs = get_fat(fs, ncl); /* Get the cluster status */
|
|
if (cs == 0) break; /* Found a free cluster */
|
|
if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
|
|
return cs;
|
|
if (ncl == scl) return 0; /* No free cluster */
|
|
}
|
|
|
|
if (put_fat(fs, ncl, 0x0FFFFFFF)) /* Mark the new cluster "last link" */
|
|
return 0xFFFFFFFF;
|
|
if (clst != 0) { /* Link it to the previous one if needed */
|
|
if (put_fat(fs, clst, ncl))
|
|
return 0xFFFFFFFF;
|
|
}
|
|
|
|
fs->last_clust = ncl; /* Update FSINFO */
|
|
if (fs->free_clust != 0xFFFFFFFF) {
|
|
fs->free_clust--;
|
|
fs->fsi_flag = 1;
|
|
}
|
|
|
|
return ncl; /* Return new cluster number */
|
|
}
|
|
#endif /* !_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get sector# from cluster# */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
|
|
DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
|
|
FATFS *fs, /* File system object */
|
|
DWORD clst /* Cluster# to be converted */
|
|
)
|
|
{
|
|
clst -= 2;
|
|
if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */
|
|
return clst * fs->csize + fs->database;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Set directory index */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_sdi (
|
|
DIR *dj, /* Pointer to directory object */
|
|
WORD idx /* Directory index number */
|
|
)
|
|
{
|
|
DWORD clst;
|
|
WORD ic;
|
|
|
|
|
|
dj->index = idx;
|
|
clst = dj->sclust;
|
|
if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */
|
|
return FR_INT_ERR;
|
|
if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
|
|
clst = dj->fs->dirbase;
|
|
|
|
if (clst == 0) { /* Static table */
|
|
dj->clust = clst;
|
|
if (idx >= dj->fs->n_rootdir) /* Index is out of range */
|
|
return FR_INT_ERR;
|
|
dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / 32); /* Sector# */
|
|
}
|
|
else { /* Dynamic table */
|
|
ic = SS(dj->fs) / 32 * dj->fs->csize; /* Entries per cluster */
|
|
while (idx >= ic) { /* Follow cluster chain */
|
|
clst = get_fat(dj->fs, clst); /* Get next cluster */
|
|
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
|
|
if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */
|
|
return FR_INT_ERR;
|
|
idx -= ic;
|
|
}
|
|
dj->clust = clst;
|
|
dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / 32); /* Sector# */
|
|
}
|
|
|
|
dj->dir = dj->fs->win + (idx % (SS(dj->fs) / 32)) * 32; /* Ptr to the entry in the sector */
|
|
|
|
return FR_OK; /* Seek succeeded */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Move directory index next */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */
|
|
DIR *dj, /* Pointer to directory object */
|
|
int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
|
|
)
|
|
{
|
|
DWORD clst;
|
|
WORD i;
|
|
|
|
|
|
i = dj->index + 1;
|
|
if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
|
|
return FR_NO_FILE;
|
|
|
|
if (!(i % (SS(dj->fs) / 32))) { /* Sector changed? */
|
|
dj->sect++; /* Next sector */
|
|
|
|
if (dj->clust == 0) { /* Static table */
|
|
if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
|
|
return FR_NO_FILE;
|
|
}
|
|
else { /* Dynamic table */
|
|
if (((i / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
|
|
clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
|
|
if (clst <= 1) return FR_INT_ERR;
|
|
if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
|
|
if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */
|
|
#if !_FS_READONLY
|
|
BYTE c;
|
|
if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */
|
|
clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */
|
|
if (clst == 0) return FR_DENIED; /* No free cluster */
|
|
if (clst == 1) return FR_INT_ERR;
|
|
if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
|
|
/* Clean-up stretched table */
|
|
if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
|
|
mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
|
|
dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
|
|
for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */
|
|
dj->fs->wflag = 1;
|
|
if (move_window(dj->fs, 0)) return FR_DISK_ERR;
|
|
dj->fs->winsect++;
|
|
}
|
|
dj->fs->winsect -= c; /* Rewind window address */
|
|
#else
|
|
return FR_NO_FILE; /* Report EOT */
|
|
#endif
|
|
}
|
|
dj->clust = clst; /* Initialize data for new cluster */
|
|
dj->sect = clust2sect(dj->fs, clst);
|
|
}
|
|
}
|
|
}
|
|
|
|
dj->index = i;
|
|
dj->dir = dj->fs->win + (i % (SS(dj->fs) / 32)) * 32;
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_LFN
|
|
static
|
|
const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */
|
|
|
|
|
|
static
|
|
int cmp_lfn ( /* 1:Matched, 0:Not matched */
|
|
WCHAR *lfnbuf, /* Pointer to the LFN to be compared */
|
|
BYTE *dir /* Pointer to the directory entry containing a part of LFN */
|
|
)
|
|
{
|
|
int i, s;
|
|
WCHAR wc, uc;
|
|
|
|
|
|
i = ((dir[LDIR_Ord] & 0xBF) - 1) * 13; /* Get offset in the LFN buffer */
|
|
s = 0; wc = 1;
|
|
do {
|
|
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
|
|
if (wc) { /* Last char has not been processed */
|
|
wc = ff_wtoupper(uc); /* Convert it to upper case */
|
|
if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
|
|
return 0; /* Not matched */
|
|
} else {
|
|
if (uc != 0xFFFF) return 0; /* Check filler */
|
|
}
|
|
} while (++s < 13); /* Repeat until all chars in the entry are checked */
|
|
|
|
if ((dir[LDIR_Ord] & 0x40) && wc && lfnbuf[i]) /* Last segment matched but different length */
|
|
return 0;
|
|
|
|
return 1; /* The part of LFN matched */
|
|
}
|
|
|
|
|
|
|
|
static
|
|
int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */
|
|
WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */
|
|
BYTE *dir /* Pointer to the directory entry */
|
|
)
|
|
{
|
|
int i, s;
|
|
WCHAR wc, uc;
|
|
|
|
|
|
i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
|
|
|
|
s = 0; wc = 1;
|
|
do {
|
|
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
|
|
if (wc) { /* Last char has not been processed */
|
|
if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
|
|
lfnbuf[i++] = wc = uc; /* Store it */
|
|
} else {
|
|
if (uc != 0xFFFF) return 0; /* Check filler */
|
|
}
|
|
} while (++s < 13); /* Read all character in the entry */
|
|
|
|
if (dir[LDIR_Ord] & 0x40) { /* Put terminator if it is the last LFN part */
|
|
if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
|
|
lfnbuf[i] = 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
#if !_FS_READONLY
|
|
static
|
|
void fit_lfn (
|
|
const WCHAR *lfnbuf, /* Pointer to the LFN buffer */
|
|
BYTE *dir, /* Pointer to the directory entry */
|
|
BYTE ord, /* LFN order (1-20) */
|
|
BYTE sum /* SFN sum */
|
|
)
|
|
{
|
|
int i, s;
|
|
WCHAR wc;
|
|
|
|
|
|
dir[LDIR_Chksum] = sum; /* Set check sum */
|
|
dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
|
|
dir[LDIR_Type] = 0;
|
|
ST_WORD(dir+LDIR_FstClusLO, 0);
|
|
|
|
i = (ord - 1) * 13; /* Get offset in the LFN buffer */
|
|
s = wc = 0;
|
|
do {
|
|
if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
|
|
ST_WORD(dir+LfnOfs[s], wc); /* Put it */
|
|
if (!wc) wc = 0xFFFF; /* Padding chars following last char */
|
|
} while (++s < 13);
|
|
if (wc == 0xFFFF || !lfnbuf[i]) ord |= 0x40; /* Bottom LFN part is the start of LFN sequence */
|
|
dir[LDIR_Ord] = ord; /* Set the LFN order */
|
|
}
|
|
|
|
#endif
|
|
#endif
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Create numbered name */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_LFN
|
|
void gen_numname (
|
|
BYTE *dst, /* Pointer to generated SFN */
|
|
const BYTE *src, /* Pointer to source SFN to be modified */
|
|
const WCHAR *lfn, /* Pointer to LFN */
|
|
WORD seq /* Sequence number */
|
|
)
|
|
{
|
|
BYTE ns[8], c;
|
|
int i, j;
|
|
|
|
|
|
mem_cpy(dst, src, 11);
|
|
|
|
if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
|
|
do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn);
|
|
}
|
|
|
|
/* itoa */
|
|
i = 7;
|
|
do {
|
|
c = (seq % 16) + '0';
|
|
if (c > '9') c += 7;
|
|
ns[i--] = c;
|
|
seq /= 16;
|
|
} while (seq);
|
|
ns[i] = '~';
|
|
|
|
/* Append the number */
|
|
for (j = 0; j < i && dst[j] != ' '; j++) {
|
|
if (IsDBCS1(dst[j])) {
|
|
if (j == i - 1) break;
|
|
j++;
|
|
}
|
|
}
|
|
do {
|
|
dst[j++] = (i < 8) ? ns[i++] : ' ';
|
|
} while (j < 8);
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Calculate sum of an SFN */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_LFN
|
|
static
|
|
BYTE sum_sfn (
|
|
const BYTE *dir /* Ptr to directory entry */
|
|
)
|
|
{
|
|
BYTE sum = 0;
|
|
int n = 11;
|
|
|
|
do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
|
|
return sum;
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Find an object in the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_find (
|
|
DIR *dj /* Pointer to the directory object linked to the file name */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE c, *dir;
|
|
#if _USE_LFN
|
|
BYTE a, ord, sum;
|
|
#endif
|
|
|
|
res = dir_sdi(dj, 0); /* Rewind directory object */
|
|
if (res != FR_OK) return res;
|
|
|
|
#if _USE_LFN
|
|
ord = sum = 0xFF;
|
|
#endif
|
|
do {
|
|
res = move_window(dj->fs, dj->sect);
|
|
if (res != FR_OK) break;
|
|
dir = dj->dir; /* Ptr to the directory entry of current index */
|
|
c = dir[DIR_Name];
|
|
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
|
|
#if _USE_LFN /* LFN configuration */
|
|
a = dir[DIR_Attr] & AM_MASK;
|
|
if (c == 0xE5 || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
|
|
ord = 0xFF;
|
|
} else {
|
|
if (a == AM_LFN) { /* An LFN entry is found */
|
|
if (dj->lfn) {
|
|
if (c & 0x40) { /* Is it start of LFN sequence? */
|
|
sum = dir[LDIR_Chksum];
|
|
c &= 0xBF; ord = c; /* LFN start order */
|
|
dj->lfn_idx = dj->index;
|
|
}
|
|
/* Check validity of the LFN entry and compare it with given name */
|
|
ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
|
|
}
|
|
} else { /* An SFN entry is found */
|
|
if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
|
|
ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
|
|
if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */
|
|
}
|
|
}
|
|
#else /* Non LFN configuration */
|
|
if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
|
|
break;
|
|
#endif
|
|
res = dir_next(dj, 0); /* Next entry */
|
|
} while (res == FR_OK);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Read an object from the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _FS_MINIMIZE <= 1
|
|
static
|
|
FRESULT dir_read (
|
|
DIR *dj /* Pointer to the directory object that pointing the entry to be read */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE c, *dir;
|
|
#if _USE_LFN
|
|
BYTE a, ord = 0xFF, sum = 0xFF;
|
|
#endif
|
|
|
|
res = FR_NO_FILE;
|
|
while (dj->sect) {
|
|
res = move_window(dj->fs, dj->sect);
|
|
if (res != FR_OK) break;
|
|
dir = dj->dir; /* Ptr to the directory entry of current index */
|
|
c = dir[DIR_Name];
|
|
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
|
|
#if _USE_LFN /* LFN configuration */
|
|
a = dir[DIR_Attr] & AM_MASK;
|
|
if (c == 0xE5 || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
|
|
ord = 0xFF;
|
|
} else {
|
|
if (a == AM_LFN) { /* An LFN entry is found */
|
|
if (c & 0x40) { /* Is it start of LFN sequence? */
|
|
sum = dir[LDIR_Chksum];
|
|
c &= 0xBF; ord = c;
|
|
dj->lfn_idx = dj->index;
|
|
}
|
|
/* Check LFN validity and capture it */
|
|
ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
|
|
} else { /* An SFN entry is found */
|
|
if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
|
|
dj->lfn_idx = 0xFFFF; /* It has no LFN. */
|
|
break;
|
|
}
|
|
}
|
|
#else /* Non LFN configuration */
|
|
if (c != 0xE5 && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
|
|
break;
|
|
#endif
|
|
res = dir_next(dj, 0); /* Next entry */
|
|
if (res != FR_OK) break;
|
|
}
|
|
|
|
if (res != FR_OK) dj->sect = 0;
|
|
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Register an object to the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if !_FS_READONLY
|
|
static
|
|
FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
|
|
DIR *dj /* Target directory with object name to be created */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE c, *dir;
|
|
#if _USE_LFN /* LFN configuration */
|
|
WORD n, ne, is;
|
|
BYTE sn[12], *fn, sum;
|
|
WCHAR *lfn;
|
|
|
|
|
|
fn = dj->fn; lfn = dj->lfn;
|
|
mem_cpy(sn, fn, 12);
|
|
|
|
if (_FS_RPATH && (sn[NS] & NS_DOT)) return FR_INVALID_NAME; /* Cannot create dot entry */
|
|
|
|
if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
|
|
fn[NS] = 0; dj->lfn = 0; /* Find only SFN */
|
|
for (n = 1; n < 100; n++) {
|
|
gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
|
|
res = dir_find(dj); /* Check if the name collides with existing SFN */
|
|
if (res != FR_OK) break;
|
|
}
|
|
if (n == 100) return FR_DENIED; /* Abort if too many collisions */
|
|
if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
|
|
fn[NS] = sn[NS]; dj->lfn = lfn;
|
|
}
|
|
|
|
if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */
|
|
for (ne = 0; lfn[ne]; ne++) ;
|
|
ne = (ne + 25) / 13;
|
|
} else { /* Otherwise reserve only an SFN entry. */
|
|
ne = 1;
|
|
}
|
|
|
|
/* Reserve contiguous entries */
|
|
res = dir_sdi(dj, 0);
|
|
if (res != FR_OK) return res;
|
|
n = is = 0;
|
|
do {
|
|
res = move_window(dj->fs, dj->sect);
|
|
if (res != FR_OK) break;
|
|
c = *dj->dir; /* Check the entry status */
|
|
if (c == 0xE5 || c == 0) { /* Is it a blank entry? */
|
|
if (n == 0) is = dj->index; /* First index of the contiguous entry */
|
|
if (++n == ne) break; /* A contiguous entry that required count is found */
|
|
} else {
|
|
n = 0; /* Not a blank entry. Restart to search */
|
|
}
|
|
res = dir_next(dj, 1); /* Next entry with table stretch */
|
|
} while (res == FR_OK);
|
|
|
|
if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */
|
|
res = dir_sdi(dj, is);
|
|
if (res == FR_OK) {
|
|
sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */
|
|
ne--;
|
|
do { /* Store LFN entries in bottom first */
|
|
res = move_window(dj->fs, dj->sect);
|
|
if (res != FR_OK) break;
|
|
fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
|
|
dj->fs->wflag = 1;
|
|
res = dir_next(dj, 0); /* Next entry */
|
|
} while (res == FR_OK && --ne);
|
|
}
|
|
}
|
|
|
|
#else /* Non LFN configuration */
|
|
res = dir_sdi(dj, 0);
|
|
if (res == FR_OK) {
|
|
do { /* Find a blank entry for the SFN */
|
|
res = move_window(dj->fs, dj->sect);
|
|
if (res != FR_OK) break;
|
|
c = *dj->dir;
|
|
if (c == 0xE5 || c == 0) break; /* Is it a blank entry? */
|
|
res = dir_next(dj, 1); /* Next entry with table stretch */
|
|
} while (res == FR_OK);
|
|
}
|
|
#endif
|
|
|
|
if (res == FR_OK) { /* Initialize the SFN entry */
|
|
res = move_window(dj->fs, dj->sect);
|
|
if (res == FR_OK) {
|
|
dir = dj->dir;
|
|
mem_set(dir, 0, 32); /* Clean the entry */
|
|
mem_cpy(dir, dj->fn, 11); /* Put SFN */
|
|
#if _USE_LFN
|
|
dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */
|
|
#endif
|
|
dj->fs->wflag = 1;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
#endif /* !_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Remove an object from the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if !_FS_READONLY && !_FS_MINIMIZE
|
|
static
|
|
FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
|
|
DIR *dj /* Directory object pointing the entry to be removed */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
#if _USE_LFN /* LFN configuration */
|
|
WORD i;
|
|
|
|
i = dj->index; /* SFN index */
|
|
res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
|
|
if (res == FR_OK) {
|
|
do {
|
|
res = move_window(dj->fs, dj->sect);
|
|
if (res != FR_OK) break;
|
|
*dj->dir = 0xE5; /* Mark the entry "deleted" */
|
|
dj->fs->wflag = 1;
|
|
if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
|
|
res = dir_next(dj, 0); /* Next entry */
|
|
} while (res == FR_OK);
|
|
if (res == FR_NO_FILE) res = FR_INT_ERR;
|
|
}
|
|
|
|
#else /* Non LFN configuration */
|
|
res = dir_sdi(dj, dj->index);
|
|
if (res == FR_OK) {
|
|
res = move_window(dj->fs, dj->sect);
|
|
if (res == FR_OK) {
|
|
*dj->dir = 0xE5; /* Mark the entry "deleted" */
|
|
dj->fs->wflag = 1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return res;
|
|
}
|
|
#endif /* !_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Pick a segment and create the object name in directory form */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT create_name (
|
|
DIR *dj, /* Pointer to the directory object */
|
|
const TCHAR **path /* Pointer to pointer to the segment in the path string */
|
|
)
|
|
{
|
|
#ifdef _EXCVT
|
|
static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */
|
|
#endif
|
|
|
|
#if _USE_LFN /* LFN configuration */
|
|
BYTE b, cf;
|
|
WCHAR w, *lfn;
|
|
int i, ni, si, di;
|
|
const TCHAR *p;
|
|
|
|
/* Create LFN in Unicode */
|
|
si = di = 0;
|
|
p = *path;
|
|
lfn = dj->lfn;
|
|
for (;;) {
|
|
w = p[si++]; /* Get a character */
|
|
if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
|
|
if (di >= _MAX_LFN) /* Reject too long name */
|
|
return FR_INVALID_NAME;
|
|
#if !_LFN_UNICODE
|
|
w &= 0xFF;
|
|
if (IsDBCS1(w)) { /* If it is a DBC 1st byte */
|
|
b = p[si++]; /* Get 2nd byte */
|
|
if (!IsDBCS2(b)) /* Reject invalid code for DBC */
|
|
return FR_INVALID_NAME;
|
|
w = (w << 8) + b;
|
|
}
|
|
w = ff_convert(w, 1); /* Convert OEM to Unicode */
|
|
if (!w) return FR_INVALID_NAME; /* Reject invalid code */
|
|
#endif
|
|
if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
|
|
return FR_INVALID_NAME;
|
|
lfn[di++] = w; /* Store the Unicode char */
|
|
}
|
|
*path = &p[si]; /* Return pointer to the next segment */
|
|
cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
|
|
#if _FS_RPATH
|
|
if ((di == 1 && lfn[di - 1] == '.') || /* Is this a dot entry? */
|
|
(di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) {
|
|
lfn[di] = 0;
|
|
for (i = 0; i < 11; i++)
|
|
dj->fn[i] = (i < di) ? '.' : ' ';
|
|
dj->fn[i] = cf | NS_DOT; /* This is a dot entry */
|
|
return FR_OK;
|
|
}
|
|
#endif
|
|
while (di) { /* Strip trailing spaces and dots */
|
|
w = lfn[di - 1];
|
|
if (w != ' ' && w != '.') break;
|
|
di--;
|
|
}
|
|
if (!di) return FR_INVALID_NAME; /* Reject null string */
|
|
|
|
lfn[di] = 0; /* LFN is created */
|
|
|
|
/* Create SFN in directory form */
|
|
mem_set(dj->fn, ' ', 11);
|
|
for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
|
|
if (si) cf |= NS_LOSS | NS_LFN;
|
|
while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
|
|
|
|
b = i = 0; ni = 8;
|
|
for (;;) {
|
|
w = lfn[si++]; /* Get an LFN char */
|
|
if (!w) break; /* Break on end of the LFN */
|
|
if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
|
|
cf |= NS_LOSS | NS_LFN; continue;
|
|
}
|
|
|
|
if (i >= ni || si == di) { /* Extension or end of SFN */
|
|
if (ni == 11) { /* Long extension */
|
|
cf |= NS_LOSS | NS_LFN; break;
|
|
}
|
|
if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
|
|
if (si > di) break; /* No extension */
|
|
si = di; i = 8; ni = 11; /* Enter extension section */
|
|
b <<= 2; continue;
|
|
}
|
|
|
|
if (w >= 0x80) { /* Non ASCII char */
|
|
#ifdef _EXCVT
|
|
w = ff_convert(w, 0); /* Unicode -> OEM code */
|
|
if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
|
|
#else
|
|
w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
|
|
#endif
|
|
cf |= NS_LFN; /* Force create LFN entry */
|
|
}
|
|
|
|
if (_DF1S && w >= 0x100) { /* Double byte char */
|
|
if (i >= ni - 1) {
|
|
cf |= NS_LOSS | NS_LFN; i = ni; continue;
|
|
}
|
|
dj->fn[i++] = (BYTE)(w >> 8);
|
|
} else { /* Single byte char */
|
|
if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */
|
|
w = '_'; cf |= NS_LOSS | NS_LFN; /* Lossy conversion */
|
|
} else {
|
|
if (IsUpper(w)) { /* ASCII large capital */
|
|
b |= 2;
|
|
} else {
|
|
if (IsLower(w)) { /* ASCII small capital */
|
|
b |= 1; w -= 0x20;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
dj->fn[i++] = (BYTE)w;
|
|
}
|
|
|
|
if (dj->fn[0] == 0xE5) dj->fn[0] = 0x05; /* If the first char collides with deleted mark, replace it with 0x05 */
|
|
|
|
if (ni == 8) b <<= 2;
|
|
if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
|
|
cf |= NS_LFN;
|
|
if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */
|
|
if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
|
|
if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
|
|
}
|
|
|
|
dj->fn[NS] = cf; /* SFN is created */
|
|
|
|
return FR_OK;
|
|
|
|
|
|
#else /* Non-LFN configuration */
|
|
BYTE b, c, d, *sfn;
|
|
int ni, si, i;
|
|
const char *p;
|
|
|
|
/* Create file name in directory form */
|
|
sfn = dj->fn;
|
|
mem_set(sfn, ' ', 11);
|
|
si = i = b = 0; ni = 8;
|
|
p = *path;
|
|
#if _FS_RPATH
|
|
if (p[si] == '.') { /* Is this a dot entry? */
|
|
for (;;) {
|
|
c = (BYTE)p[si++];
|
|
if (c != '.' || si >= 3) break;
|
|
sfn[i++] = c;
|
|
}
|
|
if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
|
|
*path = &p[si]; /* Return pointer to the next segment */
|
|
sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
|
|
return FR_OK;
|
|
}
|
|
#endif
|
|
for (;;) {
|
|
c = (BYTE)p[si++];
|
|
if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
|
|
if (c == '.' || i >= ni) {
|
|
if (ni != 8 || c != '.') return FR_INVALID_NAME;
|
|
i = 8; ni = 11;
|
|
b <<= 2; continue;
|
|
}
|
|
if (c >= 0x80) { /* Extended char */
|
|
#ifdef _EXCVT
|
|
c = excvt[c - 0x80]; /* Convert extend char (SBCS) */
|
|
#else
|
|
b |= 3; /* Eliminate NT flag if extended char is exist */
|
|
#if !_DF1S /* ASCII only cfg */
|
|
return FR_INVALID_NAME;
|
|
#endif
|
|
#endif
|
|
}
|
|
if (IsDBCS1(c)) { /* DBC 1st byte? */
|
|
d = (BYTE)p[si++]; /* Get 2nd byte */
|
|
if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
|
|
return FR_INVALID_NAME;
|
|
sfn[i++] = c;
|
|
sfn[i++] = d;
|
|
} else { /* Single byte code */
|
|
if (chk_chr("\"*+,:<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */
|
|
return FR_INVALID_NAME;
|
|
if (IsUpper(c)) { /* ASCII large capital? */
|
|
b |= 2;
|
|
} else {
|
|
if (IsLower(c)) { /* ASCII small capital? */
|
|
b |= 1; c -= 0x20;
|
|
}
|
|
}
|
|
sfn[i++] = c;
|
|
}
|
|
}
|
|
*path = &p[si]; /* Return pointer to the next segment */
|
|
c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
|
|
|
|
if (!i) return FR_INVALID_NAME; /* Reject null string */
|
|
if (sfn[0] == 0xE5) sfn[0] = 0x05; /* When first char collides with 0xE5, replace it with 0x05 */
|
|
|
|
if (ni == 8) b <<= 2;
|
|
if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */
|
|
if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */
|
|
|
|
sfn[NS] = c; /* Store NT flag, File name is created */
|
|
|
|
return FR_OK;
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get file information from directory entry */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _FS_MINIMIZE <= 1
|
|
static
|
|
void get_fileinfo ( /* No return code */
|
|
DIR *dj, /* Pointer to the directory object */
|
|
FILINFO *fno /* Pointer to the file information to be filled */
|
|
)
|
|
{
|
|
int i;
|
|
BYTE nt, *dir;
|
|
TCHAR *p, c;
|
|
|
|
|
|
p = fno->fname;
|
|
if (dj->sect) {
|
|
dir = dj->dir;
|
|
nt = dir[DIR_NTres]; /* NT flag */
|
|
for (i = 0; i < 8; i++) { /* Copy name body */
|
|
c = dir[i];
|
|
if (c == ' ') break;
|
|
if (c == 0x05) c = (TCHAR)0xE5;
|
|
if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
|
|
#if _LFN_UNICODE
|
|
if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i + 1]))
|
|
c = (c << 8) | dir[++i];
|
|
c = ff_convert(c, 1);
|
|
if (!c) c = '?';
|
|
#endif
|
|
*p++ = c;
|
|
}
|
|
if (dir[8] != ' ') { /* Copy name extension */
|
|
*p++ = '.';
|
|
for (i = 8; i < 11; i++) {
|
|
c = dir[i];
|
|
if (c == ' ') break;
|
|
if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
|
|
#if _LFN_UNICODE
|
|
if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i + 1]))
|
|
c = (c << 8) | dir[++i];
|
|
c = ff_convert(c, 1);
|
|
if (!c) c = '?';
|
|
#endif
|
|
*p++ = c;
|
|
}
|
|
}
|
|
fno->fattrib = dir[DIR_Attr]; /* Attribute */
|
|
fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
|
|
fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
|
|
fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
|
|
}
|
|
*p = 0;
|
|
|
|
#if _USE_LFN
|
|
if (fno->lfname) {
|
|
TCHAR *tp = fno->lfname;
|
|
WCHAR w, *lfn;
|
|
|
|
i = 0;
|
|
if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
|
|
lfn = dj->lfn;
|
|
while ((w = *lfn++) != 0) { /* Get an LFN char */
|
|
#if !_LFN_UNICODE
|
|
w = ff_convert(w, 0); /* Unicode -> OEM conversion */
|
|
if (!w) { i = 0; break; } /* Could not convert, no LFN */
|
|
if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC */
|
|
tp[i++] = (TCHAR)(w >> 8);
|
|
#endif
|
|
if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overrun, no LFN */
|
|
tp[i++] = (TCHAR)w;
|
|
}
|
|
}
|
|
tp[i] = 0; /* Terminator */
|
|
}
|
|
#endif
|
|
}
|
|
#endif /* _FS_MINIMIZE <= 1 */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Follow a file path */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
|
|
DIR *dj, /* Directory object to return last directory and found object */
|
|
const TCHAR *path /* Full-path string to find a file or directory */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE *dir, ns;
|
|
|
|
|
|
#if _FS_RPATH
|
|
if (*path == '/' || *path == '\\') { /* There is a heading separator */
|
|
path++; dj->sclust = 0; /* Strip it and start from the root dir */
|
|
} else { /* No heading separator */
|
|
dj->sclust = dj->fs->cdir; /* Start from the current dir */
|
|
}
|
|
#else
|
|
if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
|
|
path++;
|
|
dj->sclust = 0; /* Start from the root dir */
|
|
#endif
|
|
|
|
if ((UINT)*path < ' ') { /* Null path means the start directory itself */
|
|
res = dir_sdi(dj, 0);
|
|
dj->dir = 0;
|
|
|
|
} else { /* Follow path */
|
|
for (;;) {
|
|
res = create_name(dj, &path); /* Get a segment */
|
|
if (res != FR_OK) break;
|
|
res = dir_find(dj); /* Find it */
|
|
ns = *(dj->fn+NS);
|
|
if (res != FR_OK) { /* Failed to find the object */
|
|
if (res != FR_NO_FILE) break; /* Abort if any hard error occurred */
|
|
/* Object not found */
|
|
if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */
|
|
dj->sclust = 0; dj->dir = 0; /* It is the root dir */
|
|
res = FR_OK;
|
|
if (!(ns & NS_LAST)) continue;
|
|
} else { /* Could not find the object */
|
|
if (!(ns & NS_LAST)) res = FR_NO_PATH;
|
|
}
|
|
break;
|
|
}
|
|
if (ns & NS_LAST) break; /* Last segment match. Function completed. */
|
|
dir = dj->dir; /* There is next segment. Follow the sub directory */
|
|
if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
|
|
res = FR_NO_PATH; break;
|
|
}
|
|
dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Load boot record and check if it is an FAT boot record */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
BYTE check_fs ( /* 0:The FAT BR, 1:Valid BR but not an FAT, 2:Not a BR, 3:Disk error */
|
|
FATFS *fs, /* File system object */
|
|
DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
|
|
)
|
|
{
|
|
if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */
|
|
return 3;
|
|
if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
|
|
return 2;
|
|
|
|
if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
|
|
return 0;
|
|
if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Make sure that the file system is valid */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */
|
|
const TCHAR **path, /* Pointer to pointer to the path name (drive number) */
|
|
FATFS **rfs, /* Pointer to pointer to the found file system object */
|
|
BYTE chk_wp /* !=0: Check media write protection for write access */
|
|
)
|
|
{
|
|
BYTE fmt, b, *tbl;
|
|
UINT vol;
|
|
DSTATUS stat;
|
|
DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
|
|
WORD nrsv;
|
|
const TCHAR *p = *path;
|
|
FATFS *fs;
|
|
|
|
/* Get logical drive number from the path name */
|
|
vol = p[0] - '0'; /* Is there a drive number? */
|
|
if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */
|
|
p += 2; *path = p; /* Return pointer to the path name */
|
|
} else { /* No drive number is given */
|
|
#if _FS_RPATH
|
|
vol = Drive; /* Use current drive */
|
|
#else
|
|
vol = 0; /* Use drive 0 */
|
|
#endif
|
|
}
|
|
|
|
/* Check if the logical drive is valid or not */
|
|
if (vol >= _DRIVES) /* Is the drive number valid? */
|
|
return FR_INVALID_DRIVE;
|
|
*rfs = fs = FatFs[vol]; /* Return pointer to the corresponding file system object */
|
|
if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
|
|
|
|
ENTER_FF(fs); /* Lock file system */
|
|
|
|
if (fs->fs_type) { /* If the logical drive has been mounted */
|
|
stat = disk_status(fs->drv);
|
|
if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */
|
|
#if !_FS_READONLY
|
|
if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
|
|
return FR_WRITE_PROTECTED;
|
|
#endif
|
|
return FR_OK; /* The file system object is valid */
|
|
}
|
|
}
|
|
|
|
/* The logical drive must be mounted. Following code attempts to mount the volume (initialize the file system object) */
|
|
|
|
fs->fs_type = 0; /* Clear the file system object */
|
|
fs->drv = (BYTE)LD2PD(vol); /* Bind the logical drive and a physical drive */
|
|
stat = disk_initialize(fs->drv); /* Initialize low level disk I/O layer */
|
|
if (stat & STA_NOINIT) /* Check if the drive is ready */
|
|
return FR_NOT_READY;
|
|
#if _MAX_SS != 512 /* Get disk sector size if needed */
|
|
if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
|
|
return FR_NO_FILESYSTEM;
|
|
#endif
|
|
#if !_FS_READONLY
|
|
if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */
|
|
return FR_WRITE_PROTECTED;
|
|
#endif
|
|
/* Search FAT partition on the drive (Supports only generic partitions, FDISK and SFD) */
|
|
fmt = check_fs(fs, bsect = 0); /* Check sector 0 if it is a VBR */
|
|
if (fmt == 1) { /* Not an FAT-VBR, the disk may be partitioned */
|
|
/* Check the partition listed in top of the partition table */
|
|
tbl = &fs->win[MBR_Table + LD2PT(vol) * 16]; /* Partition table */
|
|
if (tbl[4]) { /* Is the partition existing? */
|
|
bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
|
|
fmt = check_fs(fs, bsect); /* Check the partition */
|
|
}
|
|
}
|
|
if (fmt == 3) return FR_DISK_ERR;
|
|
if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
|
|
|
|
/* Following code initializes the file system object */
|
|
|
|
if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
|
|
return FR_NO_FILESYSTEM;
|
|
|
|
fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
|
|
if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32);
|
|
fs->fsize = fasize;
|
|
|
|
fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */
|
|
if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
|
|
fasize *= b; /* Number of sectors for FAT area */
|
|
|
|
fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
|
|
if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be 1,2,4...128) */
|
|
|
|
fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */
|
|
if (fs->n_rootdir % (SS(fs) / 32)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */
|
|
|
|
tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
|
|
if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
|
|
|
|
nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */
|
|
if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */
|
|
|
|
/* Determine the FAT sub type */
|
|
sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / 32); /* RSV+FAT+DIR */
|
|
if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
|
|
nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
|
|
if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
|
|
fmt = FS_FAT12;
|
|
if (nclst >= MIN_FAT16) fmt = FS_FAT16;
|
|
if (nclst >= MIN_FAT32) fmt = FS_FAT32;
|
|
|
|
/* Boundaries and Limits */
|
|
fs->n_fatent = nclst + 2; /* Number of FAT entries */
|
|
fs->database = bsect + sysect; /* Data start sector */
|
|
fs->fatbase = bsect + nrsv; /* FAT start sector */
|
|
if (fmt == FS_FAT32) {
|
|
if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
|
|
fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
|
|
szbfat = fs->n_fatent * 4; /* (Required FAT size) */
|
|
} else {
|
|
if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
|
|
fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
|
|
szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */
|
|
fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
|
|
}
|
|
if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (FAT size must not be less than FAT sectors */
|
|
return FR_NO_FILESYSTEM;
|
|
|
|
#if !_FS_READONLY
|
|
/* Initialize cluster allocation information */
|
|
fs->free_clust = 0xFFFFFFFF;
|
|
fs->last_clust = 0;
|
|
|
|
/* Get fsinfo if available */
|
|
if (fmt == FS_FAT32) {
|
|
fs->fsi_flag = 0;
|
|
fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
|
|
if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK &&
|
|
LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
|
|
LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
|
|
LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
|
|
fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
|
|
fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
|
|
}
|
|
}
|
|
#endif
|
|
fs->fs_type = fmt; /* FAT sub-type */
|
|
fs->id = ++Fsid; /* File system mount ID */
|
|
fs->winsect = 0; /* Invalidate sector cache */
|
|
fs->wflag = 0;
|
|
#if _FS_RPATH
|
|
fs->cdir = 0; /* Current directory (root dir) */
|
|
#endif
|
|
#if _FS_SHARE /* Clear file lock semaphores */
|
|
for (vol = 0; vol < _FS_SHARE; vol++)
|
|
fs->flsem[vol].ctr = 0;
|
|
#endif
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Check if the file/dir object is valid or not */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
|
|
FATFS *fs, /* Pointer to the file system object */
|
|
WORD id /* Member id of the target object to be checked */
|
|
)
|
|
{
|
|
if (!fs || !fs->fs_type || fs->id != id)
|
|
return FR_INVALID_OBJECT;
|
|
|
|
ENTER_FF(fs); /* Lock file system */
|
|
|
|
if (disk_status(fs->drv) & STA_NOINIT)
|
|
return FR_NOT_READY;
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------------------
|
|
|
|
Public Functions
|
|
|
|
--------------------------------------------------------------------------*/
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Mount/Unmount a Logical Drive */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_mount (
|
|
BYTE vol, /* Logical drive number to be mounted/unmounted */
|
|
FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
|
|
)
|
|
{
|
|
FATFS *rfs;
|
|
|
|
|
|
if (vol >= _DRIVES) /* Check if the drive number is valid */
|
|
return FR_INVALID_DRIVE;
|
|
rfs = FatFs[vol]; /* Get current fs object */
|
|
|
|
if (rfs) {
|
|
#if _FS_REENTRANT /* Discard sync object of the current volume */
|
|
if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
|
|
#endif
|
|
rfs->fs_type = 0; /* Clear old fs object */
|
|
}
|
|
|
|
if (fs) {
|
|
fs->fs_type = 0; /* Clear new fs object */
|
|
#if _FS_REENTRANT /* Create sync object for the new volume */
|
|
if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
|
|
#endif
|
|
}
|
|
FatFs[vol] = fs; /* Register new fs object */
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Open or Create a File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_open (
|
|
FIL *fp, /* Pointer to the blank file object */
|
|
const TCHAR *path, /* Pointer to the file name */
|
|
BYTE mode /* Access mode and file open mode flags */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
BYTE *dir;
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
fp->fs = 0; /* Clear file object */
|
|
|
|
#if !_FS_READONLY
|
|
mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
|
|
res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ));
|
|
#else
|
|
mode &= FA_READ;
|
|
res = chk_mounted(&path, &dj.fs, 0);
|
|
#endif
|
|
INIT_BUF(dj);
|
|
if (res == FR_OK)
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
dir = dj.dir;
|
|
|
|
#if !_FS_READONLY /* R/W configuration */
|
|
if (res == FR_OK) {
|
|
if (!dir) /* Current dir itself */
|
|
res = FR_INVALID_NAME;
|
|
#if _FS_SHARE
|
|
else
|
|
res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
|
|
#endif
|
|
}
|
|
/* Create or Open a file */
|
|
if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
|
|
DWORD dw, cl;
|
|
|
|
if (res != FR_OK) { /* No file, create new */
|
|
if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
|
|
#if _FS_SHARE
|
|
res = enq_lock(dj.fs) ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
|
|
#else
|
|
res = dir_register(&dj);
|
|
#endif
|
|
mode |= FA_CREATE_ALWAYS;
|
|
dir = dj.dir; /* New entry */
|
|
}
|
|
else { /* Any object is already existing */
|
|
if (mode & FA_CREATE_NEW) { /* Cannot create new */
|
|
res = FR_EXIST;
|
|
} else {
|
|
if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) /* Cannot overwrite it (R/O or DIR) */
|
|
res = FR_DENIED;
|
|
}
|
|
}
|
|
if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
|
|
dw = get_fattime(); /* Created time */
|
|
ST_DWORD(dir+DIR_CrtTime, dw);
|
|
dir[DIR_Attr] = 0; /* Reset attribute */
|
|
ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */
|
|
cl = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO); /* Get start cluster */
|
|
ST_WORD(dir+DIR_FstClusHI, 0); /* cluster = 0 */
|
|
ST_WORD(dir+DIR_FstClusLO, 0);
|
|
dj.fs->wflag = 1;
|
|
if (cl) { /* Remove the cluster chain if exist */
|
|
dw = dj.fs->winsect;
|
|
res = remove_chain(dj.fs, cl);
|
|
if (res == FR_OK) {
|
|
dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
|
|
res = move_window(dj.fs, dw);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else { /* Open an existing file */
|
|
if (res == FR_OK) { /* Follow succeeded */
|
|
if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
|
|
res = FR_NO_FILE;
|
|
} else {
|
|
if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
|
|
res = FR_DENIED;
|
|
}
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
if (mode & (FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW))
|
|
mode |= FA__WRITTEN; /* Set file changed flag */
|
|
fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
|
|
fp->dir_ptr = dir;
|
|
#if _FS_SHARE
|
|
fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
|
|
if (!fp->lockid) res = FR_INT_ERR;
|
|
#endif
|
|
}
|
|
|
|
#else /* R/O configuration */
|
|
if (res == FR_OK) { /* Follow succeeded */
|
|
if (!dir) { /* Current dir itself */
|
|
res = FR_INVALID_NAME;
|
|
} else {
|
|
if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
|
|
res = FR_NO_FILE;
|
|
}
|
|
}
|
|
#endif
|
|
FREE_BUF();
|
|
|
|
if (res == FR_OK) {
|
|
fp->flag = mode; /* File access mode */
|
|
fp->org_clust = /* File start cluster */
|
|
((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
|
|
fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
|
|
fp->fptr = 0; /* File pointer */
|
|
fp->dsect = 0;
|
|
#if _USE_FASTSEEK
|
|
fp->cltbl = 0; /* No cluster link map table */
|
|
#endif
|
|
fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */
|
|
}
|
|
|
|
LEAVE_FF(dj.fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Read File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_read (
|
|
FIL *fp, /* Pointer to the file object */
|
|
void *buff, /* Pointer to data buffer */
|
|
UINT btr, /* Number of bytes to read */
|
|
UINT *br /* Pointer to number of bytes read */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DWORD clst, sect, remain;
|
|
UINT rcnt, cc;
|
|
BYTE csect, *rbuff = buff;
|
|
|
|
|
|
*br = 0; /* Initialize byte counter */
|
|
|
|
res = validate(fp->fs, fp->id); /* Check validity of the object */
|
|
if (res != FR_OK) LEAVE_FF(fp->fs, res);
|
|
if (fp->flag & FA__ERROR) /* Check abort flag */
|
|
LEAVE_FF(fp->fs, FR_INT_ERR);
|
|
if (!(fp->flag & FA_READ)) /* Check access mode */
|
|
LEAVE_FF(fp->fs, FR_DENIED);
|
|
remain = fp->fsize - fp->fptr;
|
|
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
|
|
|
|
for ( ; btr; /* Repeat until all data transferred */
|
|
rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
|
|
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
|
|
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
|
|
if (!csect) { /* On the cluster boundary? */
|
|
clst = (fp->fptr == 0) ? /* On the top of the file? */
|
|
fp->org_clust : get_fat(fp->fs, fp->curr_clust);
|
|
if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
|
|
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->curr_clust = clst; /* Update current cluster */
|
|
}
|
|
sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
|
|
if (!sect) ABORT(fp->fs, FR_INT_ERR);
|
|
sect += csect;
|
|
cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
|
|
if (cc) { /* Read maximum contiguous sectors directly */
|
|
if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
|
|
cc = fp->fs->csize - csect;
|
|
if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
#if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
|
|
#if _FS_TINY
|
|
if (fp->fs->wflag && fp->fs->winsect - sect < cc)
|
|
mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
|
|
#else
|
|
if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
|
|
mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
|
|
#endif
|
|
#endif
|
|
rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
|
|
continue;
|
|
}
|
|
#if !_FS_TINY
|
|
#if !_FS_READONLY
|
|
if (fp->flag & FA__DIRTY) { /* Write sector I/O buffer if needed */
|
|
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->flag &= ~FA__DIRTY;
|
|
}
|
|
#endif
|
|
if (fp->dsect != sect) { /* Fill sector buffer with file data */
|
|
if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
}
|
|
#endif
|
|
fp->dsect = sect;
|
|
}
|
|
rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
|
|
if (rcnt > btr) rcnt = btr;
|
|
#if _FS_TINY
|
|
if (move_window(fp->fs, fp->dsect)) /* Move sector window */
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
|
|
#else
|
|
mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
|
|
#endif
|
|
}
|
|
|
|
LEAVE_FF(fp->fs, FR_OK);
|
|
}
|
|
|
|
|
|
|
|
|
|
#if !_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Write File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_write (
|
|
FIL *fp, /* Pointer to the file object */
|
|
const void *buff, /* Pointer to the data to be written */
|
|
UINT btw, /* Number of bytes to write */
|
|
UINT *bw /* Pointer to number of bytes written */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DWORD clst, sect;
|
|
UINT wcnt, cc;
|
|
const BYTE *wbuff = buff;
|
|
BYTE csect;
|
|
|
|
|
|
*bw = 0; /* Initialize byte counter */
|
|
|
|
res = validate(fp->fs, fp->id); /* Check validity of the object */
|
|
if (res != FR_OK) LEAVE_FF(fp->fs, res);
|
|
if (fp->flag & FA__ERROR) /* Check abort flag */
|
|
LEAVE_FF(fp->fs, FR_INT_ERR);
|
|
if (!(fp->flag & FA_WRITE)) /* Check access mode */
|
|
LEAVE_FF(fp->fs, FR_DENIED);
|
|
if (fp->fsize + btw < fp->fsize) btw = 0; /* File size cannot reach 4GB */
|
|
|
|
for ( ; btw; /* Repeat until all data transferred */
|
|
wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
|
|
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
|
|
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
|
|
if (!csect) { /* On the cluster boundary? */
|
|
if (fp->fptr == 0) { /* On the top of the file? */
|
|
clst = fp->org_clust; /* Follow from the origin */
|
|
if (clst == 0) /* When there is no cluster chain, */
|
|
fp->org_clust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
|
|
} else { /* Middle or end of the file */
|
|
clst = create_chain(fp->fs, fp->curr_clust); /* Follow or stretch cluster chain */
|
|
}
|
|
if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
|
|
if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
|
|
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->curr_clust = clst; /* Update current cluster */
|
|
}
|
|
#if _FS_TINY
|
|
if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write back data buffer prior to following direct transfer */
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
#else
|
|
if (fp->flag & FA__DIRTY) { /* Write back data buffer prior to following direct transfer */
|
|
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->flag &= ~FA__DIRTY;
|
|
}
|
|
#endif
|
|
sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
|
|
if (!sect) ABORT(fp->fs, FR_INT_ERR);
|
|
sect += csect;
|
|
cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
|
|
if (cc) { /* Write maximum contiguous sectors directly */
|
|
if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
|
|
cc = fp->fs->csize - csect;
|
|
if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
#if _FS_TINY
|
|
if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
|
|
mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
|
|
fp->fs->wflag = 0;
|
|
}
|
|
#else
|
|
if (fp->dsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
|
|
mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
|
|
fp->flag &= ~FA__DIRTY;
|
|
}
|
|
#endif
|
|
wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
|
|
continue;
|
|
}
|
|
#if _FS_TINY
|
|
if (fp->fptr >= fp->fsize) { /* Avoid silly buffer filling at growing edge */
|
|
if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->fs->winsect = sect;
|
|
}
|
|
#else
|
|
if (fp->dsect != sect) { /* Fill sector buffer with file data */
|
|
if (fp->fptr < fp->fsize &&
|
|
disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
}
|
|
#endif
|
|
fp->dsect = sect;
|
|
}
|
|
wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Put partial sector into file I/O buffer */
|
|
if (wcnt > btw) wcnt = btw;
|
|
#if _FS_TINY
|
|
if (move_window(fp->fs, fp->dsect)) /* Move sector window */
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
|
|
fp->fs->wflag = 1;
|
|
#else
|
|
mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
|
|
fp->flag |= FA__DIRTY;
|
|
#endif
|
|
}
|
|
|
|
if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
|
|
fp->flag |= FA__WRITTEN; /* Set file changed flag */
|
|
|
|
LEAVE_FF(fp->fs, FR_OK);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Synchronize the File Object */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_sync (
|
|
FIL *fp /* Pointer to the file object */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DWORD tim;
|
|
BYTE *dir;
|
|
|
|
|
|
res = validate(fp->fs, fp->id); /* Check validity of the object */
|
|
if (res == FR_OK) {
|
|
if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
|
|
#if !_FS_TINY /* Write-back dirty buffer */
|
|
if (fp->flag & FA__DIRTY) {
|
|
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
|
|
LEAVE_FF(fp->fs, FR_DISK_ERR);
|
|
fp->flag &= ~FA__DIRTY;
|
|
}
|
|
#endif
|
|
/* Update the directory entry */
|
|
res = move_window(fp->fs, fp->dir_sect);
|
|
if (res == FR_OK) {
|
|
dir = fp->dir_ptr;
|
|
dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
|
|
ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
|
|
ST_WORD(dir+DIR_FstClusLO, fp->org_clust); /* Update start cluster */
|
|
ST_WORD(dir+DIR_FstClusHI, fp->org_clust >> 16);
|
|
tim = get_fattime(); /* Update updated time */
|
|
ST_DWORD(dir+DIR_WrtTime, tim);
|
|
fp->flag &= ~FA__WRITTEN;
|
|
fp->fs->wflag = 1;
|
|
res = sync(fp->fs);
|
|
}
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(fp->fs, res);
|
|
}
|
|
|
|
#endif /* !_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Close File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_close (
|
|
FIL *fp /* Pointer to the file object to be closed */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
|
|
#if _FS_READONLY
|
|
FATFS *fs = fp->fs;
|
|
res = validate(fs, fp->id);
|
|
if (res == FR_OK) fp->fs = 0; /* Discard file object */
|
|
LEAVE_FF(fs, res);
|
|
|
|
#else
|
|
res = f_sync(fp); /* Flush cached data */
|
|
#if _FS_SHARE
|
|
if (res == FR_OK) { /* Decrement open counter */
|
|
#if _FS_REENTRANT
|
|
res = validate(fp->fs, fp->id);
|
|
if (res == FR_OK) {
|
|
res = dec_lock(fp->fs, fp->lockid);
|
|
unlock_fs(fp->fs, FR_OK);
|
|
}
|
|
#else
|
|
res = dec_lock(fp->fs, fp->lockid);
|
|
#endif
|
|
}
|
|
#endif
|
|
if (res == FR_OK) fp->fs = 0; /* Discard file object */
|
|
return res;
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Change Current Drive/Directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
#if _FS_RPATH
|
|
|
|
FRESULT f_chdrive (
|
|
BYTE drv /* Drive number */
|
|
)
|
|
{
|
|
if (drv >= _DRIVES) return FR_INVALID_DRIVE;
|
|
|
|
Drive = drv;
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
FRESULT f_chdir (
|
|
const TCHAR *path /* Pointer to the directory path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
BYTE *dir;
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
res = chk_mounted(&path, &dj.fs, 0);
|
|
if (res == FR_OK) {
|
|
INIT_BUF(dj);
|
|
res = follow_path(&dj, path); /* Follow the path */
|
|
FREE_BUF();
|
|
if (res == FR_OK) { /* Follow completed */
|
|
dir = dj.dir; /* Pointer to the entry */
|
|
if (!dir) {
|
|
dj.fs->cdir = dj.sclust; /* Start directory itself */
|
|
} else {
|
|
if (dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
|
|
dj.fs->cdir = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
|
|
else
|
|
res = FR_NO_PATH; /* Reached but a file */
|
|
}
|
|
}
|
|
if (res == FR_NO_FILE) res = FR_NO_PATH;
|
|
}
|
|
|
|
LEAVE_FF(dj.fs, res);
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#if _FS_MINIMIZE <= 2
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Seek File R/W Pointer */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_lseek (
|
|
FIL *fp, /* Pointer to the file object */
|
|
DWORD ofs /* File pointer from top of file */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
|
|
|
|
res = validate(fp->fs, fp->id); /* Check validity of the object */
|
|
if (res != FR_OK) LEAVE_FF(fp->fs, res);
|
|
if (fp->flag & FA__ERROR) /* Check abort flag */
|
|
LEAVE_FF(fp->fs, FR_INT_ERR);
|
|
|
|
#if _USE_FASTSEEK
|
|
if (fp->cltbl) { /* Fast seek */
|
|
DWORD cl, pcl, ncl, tcl, dsc, tlen, *tbl = fp->cltbl;
|
|
BYTE csc;
|
|
|
|
tlen = *tbl++;
|
|
if (ofs == CREATE_LINKMAP) { /* Create link map table */
|
|
cl = fp->org_clust;
|
|
if (cl) {
|
|
do {
|
|
if (tlen < 4) { /* Not enough table items */
|
|
res = FR_NOT_ENOUGH_CORE; break;
|
|
}
|
|
tcl = cl; ncl = 0;
|
|
do { /* Get a fragment and store the top and length */
|
|
pcl = cl; ncl++;
|
|
cl = get_fat(fp->fs, cl);
|
|
if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
|
|
if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
|
|
} while (cl == pcl + 1);
|
|
*tbl++ = ncl; *tbl++ = tcl;
|
|
tlen -= 2;
|
|
} while (cl < fp->fs->n_fatent);
|
|
}
|
|
*tbl = 0; /* Terminate table */
|
|
|
|
} else { /* Fast seek */
|
|
if (ofs > fp->fsize) /* Clip offset at the file size */
|
|
ofs = fp->fsize;
|
|
fp->fptr = ofs; /* Set file pointer */
|
|
if (ofs) {
|
|
dsc = (ofs - 1) / SS(fp->fs);
|
|
cl = dsc / fp->fs->csize;
|
|
for (;;) {
|
|
ncl = *tbl++;
|
|
if (!ncl) ABORT(fp->fs, FR_INT_ERR);
|
|
if (cl < ncl) break;
|
|
cl -= ncl; tbl++;
|
|
}
|
|
fp->curr_clust = cl + *tbl;
|
|
csc = (BYTE)(dsc & (fp->fs->csize - 1));
|
|
dsc = clust2sect(fp->fs, fp->curr_clust);
|
|
if (!dsc) ABORT(fp->fs, FR_INT_ERR);
|
|
dsc += csc;
|
|
if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) {
|
|
#if !_FS_TINY
|
|
#if !_FS_READONLY
|
|
if (fp->flag & FA__DIRTY) { /* Flush dirty buffer if needed */
|
|
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->flag &= ~FA__DIRTY;
|
|
}
|
|
#endif
|
|
if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
#endif
|
|
fp->dsect = dsc;
|
|
}
|
|
}
|
|
}
|
|
} else
|
|
#endif
|
|
|
|
/* Normal Seek */
|
|
{
|
|
DWORD clst, bcs, nsect, ifptr;
|
|
|
|
if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
|
|
#if !_FS_READONLY
|
|
&& !(fp->flag & FA_WRITE)
|
|
#endif
|
|
) ofs = fp->fsize;
|
|
|
|
ifptr = fp->fptr;
|
|
fp->fptr = nsect = 0;
|
|
if (ofs) {
|
|
bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
|
|
if (ifptr > 0 &&
|
|
(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
|
|
fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
|
|
ofs -= fp->fptr;
|
|
clst = fp->curr_clust;
|
|
} else { /* When seek to back cluster, */
|
|
clst = fp->org_clust; /* start from the first cluster */
|
|
#if !_FS_READONLY
|
|
if (clst == 0) { /* If no cluster chain, create a new chain */
|
|
clst = create_chain(fp->fs, 0);
|
|
if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
|
|
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->org_clust = clst;
|
|
}
|
|
#endif
|
|
fp->curr_clust = clst;
|
|
}
|
|
if (clst != 0) {
|
|
while (ofs > bcs) { /* Cluster following loop */
|
|
#if !_FS_READONLY
|
|
if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
|
|
clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
|
|
if (clst == 0) { /* When disk gets full, clip file size */
|
|
ofs = bcs; break;
|
|
}
|
|
} else
|
|
#endif
|
|
clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
|
|
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
|
|
if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
|
|
fp->curr_clust = clst;
|
|
fp->fptr += bcs;
|
|
ofs -= bcs;
|
|
}
|
|
fp->fptr += ofs;
|
|
if (ofs % SS(fp->fs)) {
|
|
nsect = clust2sect(fp->fs, clst); /* Current sector */
|
|
if (!nsect) ABORT(fp->fs, FR_INT_ERR);
|
|
nsect += ofs / SS(fp->fs);
|
|
}
|
|
}
|
|
}
|
|
if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {
|
|
#if !_FS_TINY
|
|
#if !_FS_READONLY
|
|
if (fp->flag & FA__DIRTY) { /* Flush dirty buffer if needed */
|
|
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->flag &= ~FA__DIRTY;
|
|
}
|
|
#endif
|
|
if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK)
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
#endif
|
|
fp->dsect = nsect;
|
|
}
|
|
#if !_FS_READONLY
|
|
if (fp->fptr > fp->fsize) { /* Set changed flag if the file size is extended */
|
|
fp->fsize = fp->fptr;
|
|
fp->flag |= FA__WRITTEN;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
LEAVE_FF(fp->fs, res);
|
|
}
|
|
|
|
|
|
|
|
#if _FS_MINIMIZE <= 1
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Create a Directory Object */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_opendir (
|
|
DIR *dj, /* Pointer to directory object to create */
|
|
const TCHAR *path /* Pointer to the directory path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE *dir;
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
res = chk_mounted(&path, &dj->fs, 0);
|
|
if (res == FR_OK) {
|
|
INIT_BUF(*dj);
|
|
res = follow_path(dj, path); /* Follow the path to the directory */
|
|
FREE_BUF();
|
|
if (res == FR_OK) { /* Follow completed */
|
|
dir = dj->dir;
|
|
if (dir) { /* It is not the current dir */
|
|
if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
|
|
dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
|
|
} else { /* The object is not a directory */
|
|
res = FR_NO_PATH;
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
dj->id = dj->fs->id;
|
|
res = dir_sdi(dj, 0); /* Rewind dir */
|
|
}
|
|
}
|
|
if (res == FR_NO_FILE) res = FR_NO_PATH;
|
|
}
|
|
|
|
LEAVE_FF(dj->fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Read Directory Entry in Sequence */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_readdir (
|
|
DIR *dj, /* Pointer to the open directory object */
|
|
FILINFO *fno /* Pointer to file information to return */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
res = validate(dj->fs, dj->id); /* Check validity of the object */
|
|
if (res == FR_OK) {
|
|
if (!fno) {
|
|
res = dir_sdi(dj, 0);
|
|
} else {
|
|
INIT_BUF(*dj);
|
|
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, 0); /* Increment index for next */
|
|
if (res == FR_NO_FILE) {
|
|
dj->sect = 0;
|
|
res = FR_OK;
|
|
}
|
|
}
|
|
FREE_BUF();
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(dj->fs, res);
|
|
}
|
|
|
|
|
|
|
|
#if _FS_MINIMIZE == 0
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get File Status */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_stat (
|
|
const TCHAR *path, /* Pointer to the file path */
|
|
FILINFO *fno /* Pointer to file information to return */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
res = chk_mounted(&path, &dj.fs, 0);
|
|
if (res == FR_OK) {
|
|
INIT_BUF(dj);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
if (res == FR_OK) { /* Follow completed */
|
|
if (dj.dir) /* Found an object */
|
|
get_fileinfo(&dj, fno);
|
|
else /* It is root dir */
|
|
res = FR_INVALID_NAME;
|
|
}
|
|
FREE_BUF();
|
|
}
|
|
|
|
LEAVE_FF(dj.fs, res);
|
|
}
|
|
|
|
|
|
|
|
#if !_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get Number of Free Clusters */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_getfree (
|
|
const TCHAR *path, /* Pointer to the logical drive number (root dir) */
|
|
DWORD *nclst, /* Pointer to the variable to return number of free clusters */
|
|
FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DWORD n, clst, sect, stat;
|
|
UINT i;
|
|
BYTE fat, *p;
|
|
|
|
|
|
/* Get drive number */
|
|
res = chk_mounted(&path, fatfs, 0);
|
|
if (res == FR_OK) {
|
|
/* If free_clust is valid, return it without full cluster scan */
|
|
if ((*fatfs)->free_clust <= (*fatfs)->n_fatent - 2) {
|
|
*nclst = (*fatfs)->free_clust;
|
|
} else {
|
|
/* Get number of free clusters */
|
|
fat = (*fatfs)->fs_type;
|
|
n = 0;
|
|
if (fat == FS_FAT12) {
|
|
clst = 2;
|
|
do {
|
|
stat = get_fat(*fatfs, clst);
|
|
if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
|
|
if (stat == 1) { res = FR_INT_ERR; break; }
|
|
if (stat == 0) n++;
|
|
} while (++clst < (*fatfs)->n_fatent);
|
|
} else {
|
|
clst = (*fatfs)->n_fatent;
|
|
sect = (*fatfs)->fatbase;
|
|
i = 0; p = 0;
|
|
do {
|
|
if (!i) {
|
|
res = move_window(*fatfs, sect++);
|
|
if (res != FR_OK) break;
|
|
p = (*fatfs)->win;
|
|
i = SS(*fatfs);
|
|
}
|
|
if (fat == FS_FAT16) {
|
|
if (LD_WORD(p) == 0) n++;
|
|
p += 2; i -= 2;
|
|
} else {
|
|
if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
|
|
p += 4; i -= 4;
|
|
}
|
|
} while (--clst);
|
|
}
|
|
(*fatfs)->free_clust = n;
|
|
if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1;
|
|
*nclst = n;
|
|
}
|
|
}
|
|
LEAVE_FF(*fatfs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Truncate File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_truncate (
|
|
FIL *fp /* Pointer to the file object */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DWORD ncl;
|
|
|
|
|
|
res = validate(fp->fs, fp->id); /* Check validity of the object */
|
|
if (res == FR_OK) {
|
|
if (fp->flag & FA__ERROR) { /* Check abort flag */
|
|
res = FR_INT_ERR;
|
|
} else {
|
|
if (!(fp->flag & FA_WRITE)) /* Check access mode */
|
|
res = FR_DENIED;
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
if (fp->fsize > fp->fptr) {
|
|
fp->fsize = fp->fptr; /* Set file size to current R/W point */
|
|
fp->flag |= FA__WRITTEN;
|
|
if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
|
|
res = remove_chain(fp->fs, fp->org_clust);
|
|
fp->org_clust = 0;
|
|
} else { /* When truncate a part of the file, remove remaining clusters */
|
|
ncl = get_fat(fp->fs, fp->curr_clust);
|
|
res = FR_OK;
|
|
if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
|
|
if (ncl == 1) res = FR_INT_ERR;
|
|
if (res == FR_OK && ncl < fp->fs->n_fatent) {
|
|
res = put_fat(fp->fs, fp->curr_clust, 0x0FFFFFFF);
|
|
if (res == FR_OK) res = remove_chain(fp->fs, ncl);
|
|
}
|
|
}
|
|
}
|
|
if (res != FR_OK) fp->flag |= FA__ERROR;
|
|
}
|
|
|
|
LEAVE_FF(fp->fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Delete a File or Directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_unlink (
|
|
const TCHAR *path /* Pointer to the file or directory path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj, sdj;
|
|
BYTE *dir;
|
|
DWORD dclst;
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
res = chk_mounted(&path, &dj.fs, 1);
|
|
if (res == FR_OK) {
|
|
INIT_BUF(dj);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
|
|
res = FR_INVALID_NAME; /* Cannot remove dot entry */
|
|
#if _FS_SHARE
|
|
if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */
|
|
#endif
|
|
if (res == FR_OK) { /* The object is accessible */
|
|
dir = dj.dir;
|
|
if (!dir) {
|
|
res = FR_INVALID_NAME; /* Cannot remove the start directory */
|
|
} else {
|
|
if (dir[DIR_Attr] & AM_RDO)
|
|
res = FR_DENIED; /* Cannot remove R/O object */
|
|
}
|
|
dclst = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
|
|
if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */
|
|
if (dclst < 2) {
|
|
res = FR_INT_ERR;
|
|
} else {
|
|
mem_cpy(&sdj, &dj, sizeof(DIR)); /* Check if the sub-dir is empty or not */
|
|
sdj.sclust = dclst;
|
|
res = dir_sdi(&sdj, 2); /* Exclude dot entries */
|
|
if (res == FR_OK) {
|
|
res = dir_read(&sdj);
|
|
if (res == FR_OK /* Not empty dir */
|
|
#if _FS_RPATH
|
|
|| dclst == sdj.fs->cdir /* Current dir */
|
|
#endif
|
|
) res = FR_DENIED;
|
|
if (res == FR_NO_FILE) res = FR_OK; /* Empty */
|
|
}
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
res = dir_remove(&dj); /* Remove the directory entry */
|
|
if (res == FR_OK) {
|
|
if (dclst) /* Remove the cluster chain if exist */
|
|
res = remove_chain(dj.fs, dclst);
|
|
if (res == FR_OK) res = sync(dj.fs);
|
|
}
|
|
}
|
|
}
|
|
FREE_BUF();
|
|
}
|
|
LEAVE_FF(dj.fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Create a Directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_mkdir (
|
|
const TCHAR *path /* Pointer to the directory path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
BYTE *dir, n;
|
|
DWORD dsc, dcl, pcl, tim = get_fattime();
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
res = chk_mounted(&path, &dj.fs, 1);
|
|
if (res == FR_OK) {
|
|
INIT_BUF(dj);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
|
|
if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
|
|
res = FR_INVALID_NAME;
|
|
if (res == FR_NO_FILE) { /* Can create a new directory */
|
|
dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
|
|
res = FR_OK;
|
|
if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
|
|
if (dcl == 1) res = FR_INT_ERR;
|
|
if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
|
|
if (res == FR_OK) /* Flush FAT */
|
|
res = move_window(dj.fs, 0);
|
|
if (res == FR_OK) { /* Initialize the new directory table */
|
|
dsc = clust2sect(dj.fs, dcl);
|
|
dir = dj.fs->win;
|
|
mem_set(dir, 0, SS(dj.fs));
|
|
mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */
|
|
dir[DIR_Name] = '.';
|
|
dir[DIR_Attr] = AM_DIR;
|
|
ST_DWORD(dir+DIR_WrtTime, tim);
|
|
ST_WORD(dir+DIR_FstClusLO, dcl);
|
|
ST_WORD(dir+DIR_FstClusHI, dcl >> 16);
|
|
mem_cpy(dir+32, dir, 32); /* Create ".." entry */
|
|
dir[33] = '.'; pcl = dj.sclust;
|
|
if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
|
|
pcl = 0;
|
|
ST_WORD(dir+32+DIR_FstClusLO, pcl);
|
|
ST_WORD(dir+32+DIR_FstClusHI, pcl >> 16);
|
|
for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
|
|
dj.fs->winsect = dsc++;
|
|
dj.fs->wflag = 1;
|
|
res = move_window(dj.fs, 0);
|
|
if (res != FR_OK) break;
|
|
mem_set(dir, 0, SS(dj.fs));
|
|
}
|
|
}
|
|
if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directory */
|
|
if (res != FR_OK) {
|
|
remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
|
|
} else {
|
|
dir = dj.dir;
|
|
dir[DIR_Attr] = AM_DIR; /* Attribute */
|
|
ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */
|
|
ST_WORD(dir+DIR_FstClusLO, dcl); /* Table start cluster */
|
|
ST_WORD(dir+DIR_FstClusHI, dcl >> 16);
|
|
dj.fs->wflag = 1;
|
|
res = sync(dj.fs);
|
|
}
|
|
}
|
|
FREE_BUF();
|
|
}
|
|
|
|
LEAVE_FF(dj.fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Change Attribute */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_chmod (
|
|
const TCHAR *path, /* Pointer to the file path */
|
|
BYTE value, /* Attribute bits */
|
|
BYTE mask /* Attribute mask to change */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
BYTE *dir;
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
res = chk_mounted(&path, &dj.fs, 1);
|
|
if (res == FR_OK) {
|
|
INIT_BUF(dj);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
FREE_BUF();
|
|
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
|
|
res = FR_INVALID_NAME;
|
|
if (res == FR_OK) {
|
|
dir = dj.dir;
|
|
if (!dir) { /* Is it a root directory? */
|
|
res = FR_INVALID_NAME;
|
|
} else { /* File or sub directory */
|
|
mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
|
|
dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
|
|
dj.fs->wflag = 1;
|
|
res = sync(dj.fs);
|
|
}
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(dj.fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Change Time-stamp */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_utime (
|
|
const TCHAR *path, /* Pointer to the file/directory name */
|
|
const FILINFO *fno /* Pointer to the time stamp to be set */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
BYTE *dir;
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
res = chk_mounted(&path, &dj.fs, 1);
|
|
if (res == FR_OK) {
|
|
INIT_BUF(dj);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
FREE_BUF();
|
|
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
|
|
res = FR_INVALID_NAME;
|
|
if (res == FR_OK) {
|
|
dir = dj.dir;
|
|
if (!dir) { /* Root directory */
|
|
res = FR_INVALID_NAME;
|
|
} else { /* File or sub-directory */
|
|
ST_WORD(dir+DIR_WrtTime, fno->ftime);
|
|
ST_WORD(dir+DIR_WrtDate, fno->fdate);
|
|
dj.fs->wflag = 1;
|
|
res = sync(dj.fs);
|
|
}
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(dj.fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Rename File/Directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_rename (
|
|
const TCHAR *path_old, /* Pointer to the old name */
|
|
const TCHAR *path_new /* Pointer to the new name */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR djo, djn;
|
|
BYTE buf[21], *dir;
|
|
DWORD dw;
|
|
DEF_NAMEBUF;
|
|
|
|
|
|
res = chk_mounted(&path_old, &djo.fs, 1);
|
|
if (res == FR_OK) {
|
|
djn.fs = djo.fs;
|
|
INIT_BUF(djo);
|
|
res = follow_path(&djo, path_old); /* Check old object */
|
|
if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT))
|
|
res = FR_INVALID_NAME;
|
|
#if _FS_SHARE
|
|
if (res == FR_OK) res = chk_lock(&djo, 2);
|
|
#endif
|
|
if (res == FR_OK) { /* Old object is found */
|
|
if (!djo.dir) { /* Is root dir? */
|
|
res = FR_NO_FILE;
|
|
} else {
|
|
mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */
|
|
mem_cpy(&djn, &djo, sizeof(DIR)); /* Check new object */
|
|
res = follow_path(&djn, path_new);
|
|
if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
|
|
if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */
|
|
/* Start critical section that any interruption or error can cause cross-link */
|
|
res = dir_register(&djn); /* Register the new entry */
|
|
if (res == FR_OK) {
|
|
dir = djn.dir; /* Copy object information except for name */
|
|
mem_cpy(dir+13, buf+2, 19);
|
|
dir[DIR_Attr] = buf[0] | AM_ARC;
|
|
djo.fs->wflag = 1;
|
|
if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */
|
|
dw = clust2sect(djn.fs, (DWORD)LD_WORD(dir+DIR_FstClusHI) | LD_WORD(dir+DIR_FstClusLO));
|
|
if (!dw) {
|
|
res = FR_INT_ERR;
|
|
} else {
|
|
res = move_window(djn.fs, dw);
|
|
dir = djn.fs->win+32; /* .. entry */
|
|
if (res == FR_OK && dir[1] == '.') {
|
|
dw = (djn.fs->fs_type == FS_FAT32 && djn.sclust == djn.fs->dirbase) ? 0 : djn.sclust;
|
|
ST_WORD(dir+DIR_FstClusLO, dw);
|
|
ST_WORD(dir+DIR_FstClusHI, dw >> 16);
|
|
djn.fs->wflag = 1;
|
|
}
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
res = dir_remove(&djo); /* Remove old entry */
|
|
if (res == FR_OK)
|
|
res = sync(djo.fs);
|
|
}
|
|
}
|
|
/* End critical section */
|
|
}
|
|
}
|
|
}
|
|
FREE_BUF();
|
|
}
|
|
LEAVE_FF(djo.fs, res);
|
|
}
|
|
|
|
#endif /* !_FS_READONLY */
|
|
#endif /* _FS_MINIMIZE == 0 */
|
|
#endif /* _FS_MINIMIZE <= 1 */
|
|
#endif /* _FS_MINIMIZE <= 2 */
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Forward data to the stream directly (available on only tiny cfg) */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_FORWARD && _FS_TINY
|
|
|
|
FRESULT f_forward (
|
|
FIL *fp, /* Pointer to the file object */
|
|
UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
|
|
UINT btr, /* Number of bytes to forward */
|
|
UINT *bf /* Pointer to number of bytes forwarded */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DWORD remain, clst, sect;
|
|
UINT rcnt;
|
|
BYTE csect;
|
|
|
|
|
|
*bf = 0; /* Initialize byte counter */
|
|
|
|
res = validate(fp->fs, fp->id); /* Check validity of the object */
|
|
if (res != FR_OK) LEAVE_FF(fp->fs, res);
|
|
if (fp->flag & FA__ERROR) /* Check error flag */
|
|
LEAVE_FF(fp->fs, FR_INT_ERR);
|
|
if (!(fp->flag & FA_READ)) /* Check access mode */
|
|
LEAVE_FF(fp->fs, FR_DENIED);
|
|
|
|
remain = fp->fsize - fp->fptr;
|
|
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
|
|
|
|
for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
|
|
fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
|
|
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
|
|
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
|
|
if (!csect) { /* On the cluster boundary? */
|
|
clst = (fp->fptr == 0) ? /* On the top of the file? */
|
|
fp->org_clust : get_fat(fp->fs, fp->curr_clust);
|
|
if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
|
|
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->curr_clust = clst; /* Update current cluster */
|
|
}
|
|
}
|
|
sect = clust2sect(fp->fs, fp->curr_clust); /* Get current data sector */
|
|
if (!sect) ABORT(fp->fs, FR_INT_ERR);
|
|
sect += csect;
|
|
if (move_window(fp->fs, sect)) /* Move sector window */
|
|
ABORT(fp->fs, FR_DISK_ERR);
|
|
fp->dsect = sect;
|
|
rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
|
|
if (rcnt > btr) rcnt = btr;
|
|
rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
|
|
if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
|
|
}
|
|
|
|
LEAVE_FF(fp->fs, FR_OK);
|
|
}
|
|
#endif /* _USE_FORWARD */
|
|
|
|
|
|
|
|
#if _USE_MKFS && !_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Create File System on the Drive */
|
|
/*-----------------------------------------------------------------------*/
|
|
#define N_ROOTDIR 512 /* Multiple of 32 */
|
|
#define N_FATS 1 /* 1 or 2 */
|
|
|
|
|
|
FRESULT f_mkfs (
|
|
BYTE drv, /* Logical drive number */
|
|
BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
|
|
UINT au /* Allocation unit size [bytes] */
|
|
)
|
|
{
|
|
static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
|
|
static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
|
|
BYTE fmt, md, *tbl;
|
|
DWORD n_clst, vs, n;
|
|
UINT as, i;
|
|
DWORD b_vol, b_fat, b_dir, b_data; /* Area offset (LBA) */
|
|
DWORD n_vol, n_rsv, n_fat, n_dir; /* Area size */
|
|
FATFS *fs;
|
|
DSTATUS stat;
|
|
|
|
|
|
/* Check mounted drive and clear work area */
|
|
if (drv >= _DRIVES) return FR_INVALID_DRIVE;
|
|
fs = FatFs[drv];
|
|
if (!fs) return FR_NOT_ENABLED;
|
|
fs->fs_type = 0;
|
|
drv = LD2PD(drv);
|
|
|
|
/* Get disk statics */
|
|
stat = disk_initialize(drv);
|
|
if (stat & STA_NOINIT) return FR_NOT_READY;
|
|
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
|
|
#if _MAX_SS != 512 /* Get disk sector size */
|
|
if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
|
|
return FR_DISK_ERR;
|
|
#endif
|
|
if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
|
|
return FR_DISK_ERR;
|
|
b_vol = (sfd == 1) ? 0 : 63; /* Volume start sector */
|
|
n_vol -= b_vol;
|
|
if (au & (au - 1)) au = 0; /* Check validity of the allocation unit size */
|
|
if (!au) { /* AU auto selection */
|
|
vs = n_vol / (2000 / (SS(fs) / 512));
|
|
for (i = 0; vs < vst[i]; i++) ;
|
|
au = cst[i];
|
|
}
|
|
if (_MAX_SS != 512 && au < SS(fs)) au = SS(fs);
|
|
au /= SS(fs); /* Number of sectors per cluster */
|
|
if (au == 0) au = 1;
|
|
if (au > 128) au = 128;
|
|
|
|
/* Pre-compute number of clusters and FAT sub-type */
|
|
n_clst = n_vol / au;
|
|
fmt = FS_FAT12;
|
|
if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
|
|
if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
|
|
|
|
/* Determine offset and size of FAT structure */
|
|
if (fmt == FS_FAT32) {
|
|
n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
|
|
n_rsv = 32;
|
|
n_dir = 0;
|
|
} else {
|
|
n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
|
|
n_fat = (n_fat + SS(fs) - 1) / SS(fs);
|
|
n_rsv = 1;
|
|
n_dir = N_ROOTDIR * 32UL / SS(fs);
|
|
}
|
|
b_fat = b_vol + n_rsv; /* FAT area start sector */
|
|
b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
|
|
b_data = b_dir + n_dir; /* Data area start sector */
|
|
if (n_vol < b_data + au) return FR_MKFS_ABORTED; /* Too small volume */
|
|
|
|
/* Align data start sector to erase block boundary (for flash memory media) */
|
|
if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK) return FR_DISK_ERR;
|
|
if (!n || n > 32768) return FR_MKFS_ABORTED;
|
|
n = (b_data + n - 1) & ~(n - 1); /* Next nearest boundary from current data start */
|
|
n = (n - b_data) / N_FATS;
|
|
if (fmt == FS_FAT32) { /* FAT32: Move FAT start */
|
|
n_rsv += n;
|
|
b_fat += n;
|
|
} else { /* FAT12/16: Expand FAT size */
|
|
n_fat += n;
|
|
}
|
|
/* b_dir and b_data are no longer used below */
|
|
|
|
/* Determine number of cluster and final check of validity of the FAT sub-type */
|
|
n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
|
|
if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
|
|
|| (fmt == FS_FAT32 && n_clst < MIN_FAT32))
|
|
return FR_MKFS_ABORTED;
|
|
|
|
/* Create partition table if required */
|
|
if (sfd == 1) {
|
|
md = 0xF0;
|
|
} else {
|
|
DWORD n_disk = b_vol + n_vol;
|
|
|
|
mem_set(fs->win, 0, SS(fs));
|
|
tbl = fs->win+MBR_Table;
|
|
ST_DWORD(tbl, 0x00010180); /* Partition start in CHS */
|
|
if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */
|
|
n_disk = n_disk / 63 / 255;
|
|
tbl[7] = (BYTE)n_disk;
|
|
tbl[6] = (BYTE)((n_disk >> 2) | 63);
|
|
} else {
|
|
ST_WORD(&tbl[6], 0xFFFF);
|
|
}
|
|
tbl[5] = 254;
|
|
if (fmt != FS_FAT32) /* System ID */
|
|
tbl[4] = (n_vol < 0x10000) ? 0x04 : 0x06;
|
|
else
|
|
tbl[4] = 0x0c;
|
|
ST_DWORD(tbl+8, 63); /* Partition start in LBA */
|
|
ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */
|
|
ST_WORD(tbl+64, 0xAA55); /* Signature */
|
|
if (disk_write(drv, fs->win, 0, 1) != RES_OK)
|
|
return FR_DISK_ERR;
|
|
md = 0xF8;
|
|
}
|
|
|
|
/* Create VBR */
|
|
tbl = fs->win; /* Clear buffer */
|
|
mem_set(tbl, 0, SS(fs));
|
|
ST_DWORD(tbl+BS_jmpBoot, 0x90FEEB); /* Boot code (jmp $, nop) */
|
|
as = SS(fs); /* Sector size */
|
|
ST_WORD(tbl+BPB_BytsPerSec, as);
|
|
tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
|
|
ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
|
|
tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
|
|
as = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */
|
|
ST_WORD(tbl+BPB_RootEntCnt, as);
|
|
if (n_vol < 0x10000) { /* Number of total sectors */
|
|
ST_WORD(tbl+BPB_TotSec16, n_vol);
|
|
} else {
|
|
ST_DWORD(tbl+BPB_TotSec32, n_vol);
|
|
}
|
|
tbl[BPB_Media] = md; /* Media descriptor */
|
|
ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
|
|
ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
|
|
ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */
|
|
n = get_fattime(); /* Use current time as VSN */
|
|
if (fmt == FS_FAT32) {
|
|
ST_DWORD(tbl+BS_VolID32, n); /* VSN */
|
|
ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */
|
|
ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */
|
|
ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */
|
|
ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */
|
|
tbl[BS_DrvNum32] = 0x80; /* Drive number */
|
|
tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
|
|
mem_cpy(tbl+BS_VolLab32, "NO NAME FAT32 ", 19); /* Volume label, FAT signature */
|
|
} else {
|
|
ST_DWORD(tbl+BS_VolID, n); /* VSN */
|
|
ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */
|
|
tbl[BS_DrvNum] = 0x80; /* Drive number */
|
|
tbl[BS_BootSig] = 0x29; /* Extended boot signature */
|
|
mem_cpy(tbl+BS_VolLab, "NO NAME FAT ", 19); /* Volume label, FAT signature */
|
|
}
|
|
ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
|
|
if (disk_write(drv, tbl, b_vol, 1) != RES_OK) /* Original (VBR) */
|
|
return FR_DISK_ERR;
|
|
if (fmt == FS_FAT32) /* Backup (VBR+6) */
|
|
disk_write(drv, tbl, b_vol + 6, 1);
|
|
|
|
/* Initialize FAT area */
|
|
for (i = 0; i < N_FATS; i++) {
|
|
mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
|
|
n = md; /* Media descriptor byte */
|
|
if (fmt != FS_FAT32) {
|
|
n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
|
|
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */
|
|
} else {
|
|
n |= 0x0FFFFF00;
|
|
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */
|
|
ST_DWORD(tbl+4, 0x0FFFFFFF);
|
|
ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
|
|
}
|
|
if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
|
|
return FR_DISK_ERR;
|
|
mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
|
|
for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector write */
|
|
if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
|
|
return FR_DISK_ERR;
|
|
}
|
|
}
|
|
|
|
/* Initialize root directory */
|
|
n = (fmt == FS_FAT32) ? as : n_dir;
|
|
while (n--) {
|
|
if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
|
|
return FR_DISK_ERR;
|
|
}
|
|
|
|
/* Create FSInfo record if needed */
|
|
if (fmt == FS_FAT32) {
|
|
ST_WORD(tbl+BS_55AA, 0xAA55);
|
|
ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
|
|
ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
|
|
ST_DWORD(tbl+FSI_Free_Count, n_clst - 1);
|
|
ST_DWORD(tbl+FSI_Nxt_Free, 0xFFFFFFFF);
|
|
disk_write(drv, tbl, b_vol + 1, 1); /* Original (VBR+1) */
|
|
disk_write(drv, tbl, b_vol + 7, 1); /* Backup (VBR+7) */
|
|
}
|
|
|
|
return (disk_ioctl(drv, CTRL_SYNC, (void*)0) == RES_OK) ? FR_OK : FR_DISK_ERR;
|
|
}
|
|
|
|
#endif /* _USE_MKFS && !_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
#if _USE_STRFUNC
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get a string from the file */
|
|
/*-----------------------------------------------------------------------*/
|
|
TCHAR* f_gets (
|
|
TCHAR* buff, /* Pointer to the string buffer to read */
|
|
int len, /* Size of string buffer (characters) */
|
|
FIL* fil /* Pointer to the file object */
|
|
)
|
|
{
|
|
int n = 0;
|
|
TCHAR c, *p = buff;
|
|
BYTE s[2];
|
|
UINT rc;
|
|
|
|
|
|
while (n < len - 1) { /* Read bytes until buffer gets filled */
|
|
f_read(fil, s, 1, &rc);
|
|
if (rc != 1) break; /* Break on EOF or error */
|
|
c = s[0];
|
|
#if _LFN_UNICODE /* Read a character in UTF-8 encoding */
|
|
if (c >= 0x80) {
|
|
if (c < 0xC0) continue; /* Skip stray trailer */
|
|
if (c < 0xE0) { /* Two-byte sequence */
|
|
f_read(fil, s, 1, &rc);
|
|
if (rc != 1) break;
|
|
c = ((c & 0x1F) << 6) | (s[0] & 0x3F);
|
|
if (c < 0x80) c = '?';
|
|
} else {
|
|
if (c < 0xF0) { /* Three-byte sequence */
|
|
f_read(fil, s, 2, &rc);
|
|
if (rc != 2) break;
|
|
c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F);
|
|
if (c < 0x800) c = '?';
|
|
} else { /* Reject four-byte sequence */
|
|
c = '?';
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
#if _USE_STRFUNC >= 2
|
|
if (c == '\r') continue; /* Strip '\r' */
|
|
#endif
|
|
*p++ = c;
|
|
n++;
|
|
if (c == '\n') break; /* Break on EOL */
|
|
}
|
|
*p = 0;
|
|
return n ? buff : 0; /* When no data read (eof or error), return with error. */
|
|
}
|
|
|
|
|
|
|
|
#if !_FS_READONLY
|
|
#include <stdarg.h>
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Put a character to the file */
|
|
/*-----------------------------------------------------------------------*/
|
|
int f_putc (
|
|
TCHAR c, /* A character to be output */
|
|
FIL* fil /* Pointer to the file object */
|
|
)
|
|
{
|
|
UINT bw, btw;
|
|
BYTE s[3];
|
|
|
|
|
|
#if _USE_STRFUNC >= 2
|
|
if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */
|
|
#endif
|
|
|
|
#if _LFN_UNICODE /* Write the character in UTF-8 encoding */
|
|
if (c < 0x80) { /* 7-bit */
|
|
s[0] = (BYTE)c;
|
|
btw = 1;
|
|
} else {
|
|
if (c < 0x800) { /* 11-bit */
|
|
s[0] = (BYTE)(0xC0 | (c >> 6));
|
|
s[1] = (BYTE)(0x80 | (c & 0x3F));
|
|
btw = 2;
|
|
} else { /* 16-bit */
|
|
s[0] = (BYTE)(0xE0 | (c >> 12));
|
|
s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F));
|
|
s[2] = (BYTE)(0x80 | (c & 0x3F));
|
|
btw = 3;
|
|
}
|
|
}
|
|
#else /* Write the character without conversion */
|
|
s[0] = (BYTE)c;
|
|
btw = 1;
|
|
#endif
|
|
f_write(fil, s, btw, &bw); /* Write the char to the file */
|
|
return (bw == btw) ? 1 : EOF; /* Return the result */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Put a string to the file */
|
|
/*-----------------------------------------------------------------------*/
|
|
int f_puts (
|
|
const TCHAR* str, /* Pointer to the string to be output */
|
|
FIL* fil /* Pointer to the file object */
|
|
)
|
|
{
|
|
int n;
|
|
|
|
|
|
for (n = 0; *str; str++, n++) {
|
|
if (f_putc(*str, fil) == EOF) return EOF;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Put a formatted string to the file */
|
|
/*-----------------------------------------------------------------------*/
|
|
int f_printf (
|
|
FIL* fil, /* Pointer to the file object */
|
|
const TCHAR* str, /* Pointer to the format string */
|
|
... /* Optional arguments... */
|
|
)
|
|
{
|
|
va_list arp;
|
|
BYTE f, r;
|
|
UINT i, w;
|
|
ULONG val;
|
|
TCHAR c, d, s[16];
|
|
int res, cc;
|
|
|
|
|
|
va_start(arp, str);
|
|
|
|
for (cc = res = 0; cc != EOF; res += cc) {
|
|
c = *str++;
|
|
if (c == 0) break; /* End of string */
|
|
if (c != '%') { /* Non escape character */
|
|
cc = f_putc(c, fil);
|
|
if (cc != EOF) cc = 1;
|
|
continue;
|
|
}
|
|
w = f = 0;
|
|
c = *str++;
|
|
if (c == '0') { /* Flag: '0' padding */
|
|
f = 1; c = *str++;
|
|
}
|
|
while (IsDigit(c)) { /* Precision */
|
|
w = w * 10 + c - '0';
|
|
c = *str++;
|
|
}
|
|
if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
|
|
f |= 2; c = *str++;
|
|
}
|
|
if (!c) break;
|
|
d = c;
|
|
if (IsLower(d)) d -= 0x20;
|
|
switch (d) { /* Type is... */
|
|
case 'S' : /* String */
|
|
cc = f_puts(va_arg(arp, TCHAR*), fil); continue;
|
|
case 'C' : /* Character */
|
|
cc = f_putc((TCHAR)va_arg(arp, int), fil); continue;
|
|
case 'B' : /* Binary */
|
|
r = 2; break;
|
|
case 'O' : /* Octal */
|
|
r = 8; break;
|
|
case 'D' : /* Signed decimal */
|
|
case 'U' : /* Unsigned decimal */
|
|
r = 10; break;
|
|
case 'X' : /* Hexadecimal */
|
|
r = 16; break;
|
|
default: /* Unknown */
|
|
cc = f_putc(c, fil); continue;
|
|
}
|
|
|
|
/* Get an argument */
|
|
val = (f & 2) ? va_arg(arp, long) : ((d == 'D') ? (long)va_arg(arp, int) : va_arg(arp, unsigned int));
|
|
if (d == 'D' && (val & 0x80000000)) {
|
|
val = 0 - val;
|
|
f |= 4;
|
|
}
|
|
/* Put it in numeral string */
|
|
i = 0;
|
|
do {
|
|
d = (TCHAR)(val % r); val /= r;
|
|
if (d > 9) {
|
|
d += 7;
|
|
if (c == 'x') d += 0x20;
|
|
}
|
|
s[i++] = d + '0';
|
|
} while (val && i < sizeof(s) / sizeof(s[0]));
|
|
if (f & 4) s[i++] = '-';
|
|
cc = 0;
|
|
while (i < w-- && cc != EOF) {
|
|
cc = f_putc((TCHAR)((f & 1) ? '0' : ' '), fil);
|
|
res++;
|
|
}
|
|
do {
|
|
cc = f_putc(s[--i], fil);
|
|
res++;
|
|
} while (i && cc != EOF);
|
|
if (cc != EOF) cc = 0;
|
|
}
|
|
|
|
va_end(arp);
|
|
return (cc == EOF) ? cc : res;
|
|
}
|
|
|
|
#endif /* !_FS_READONLY */
|
|
#endif /* _USE_STRFUNC */
|