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circuitpython/lib/fatfs/ff.c
Daniel Campora 7b19e99edd lib: Update FatFs to R0.11. 
There are lots of cosmetic changes, but this release brings a  very
important bug fix:
 - Fixed f_unlink() does not remove cluster chain of the file.

With R0.10c if you try to write a file that is too large to fit in the
free space of the drive, the operation fails, you delete the incomplete
file, and it seems to be erased, but the space is not really freed,
because any subsequent write operations fail because the drive is
"still" full. The only way to recover from this is by formatting the
drive. I can confirm that R0.11 fixes the problem.
2015-03-29 22:12:14 +01:00

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/*----------------------------------------------------------------------------/
/ FatFs - FAT file system module R0.11 (C)ChaN, 2015
/-----------------------------------------------------------------------------/
/ FatFs module is a free software that opened under license policy of
/ following conditions.
/
/ Copyright (C) 2015, ChaN, all right reserved.
/
/ 1. Redistributions of source code must retain the above copyright notice,
/ this condition and the following disclaimer.
/
/ This software is provided by the copyright holder and contributors "AS IS"
/ and any warranties related to this software are DISCLAIMED.
/ The copyright owner or contributors be NOT LIABLE for any damages caused
/ by use of this software.
/----------------------------------------------------------------------------*/
#include <string.h> // dpgeorge: needed to use the stdlib versions of memset and memcmp
#include "ff.h" /* Declarations of FatFs API */
#include "diskio.h" /* Declarations of disk I/O functions */
/*--------------------------------------------------------------------------
Module Private Definitions
---------------------------------------------------------------------------*/
#if _FATFS != 32020 /* Revision ID */
#error Wrong include file (ff.h).
#endif
/* Reentrancy related */
#if _FS_REENTRANT
#if _USE_LFN == 1
#error Static LFN work area cannot be used at thread-safe configuration
#endif
#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
#else
#define ENTER_FF(fs)
#define LEAVE_FF(fs, res) return res
#endif
#define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
/* Definitions of sector size */
#if (_MAX_SS < _MIN_SS) || (_MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096) || (_MIN_SS != 512 && _MIN_SS != 1024 && _MIN_SS != 2048 && _MIN_SS != 4096)
#error Wrong sector size configuration
#endif
#if _MAX_SS == _MIN_SS
#define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */
#else
#define SS(fs) ((fs)->ssize) /* Variable sector size */
#endif
/* Timestamp feature */
#if _FS_NORTC == 1
#if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31
#error Invalid _FS_NORTC settings
#endif
#define GET_FATTIME() ((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16)
#else
#define GET_FATTIME() get_fattime()
#endif
/* File access control feature */
#if _FS_LOCK
#if _FS_READONLY
#error _FS_LOCK must be 0 at read-only configuration
#endif
typedef struct {
FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
DWORD clu; /* Object ID 2, directory (0:root) */
WORD idx; /* Object ID 3, directory index */
WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
} FILESEM;
#endif
/* DBCS code ranges and SBCS extend character conversion table */
#if _CODE_PAGE == 932 /* Japanese Shift-JIS */
#define _DF1S 0x81 /* DBC 1st byte range 1 start */
#define _DF1E 0x9F /* DBC 1st byte range 1 end */
#define _DF2S 0xE0 /* DBC 1st byte range 2 start */
#define _DF2E 0xFC /* DBC 1st byte range 2 end */
#define _DS1S 0x40 /* DBC 2nd byte range 1 start */
#define _DS1E 0x7E /* DBC 2nd byte range 1 end */
#define _DS2S 0x80 /* DBC 2nd byte range 2 start */
#define _DS2E 0xFC /* DBC 2nd byte range 2 end */
#elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
#define _DF1S 0x81
#define _DF1E 0xFE
#define _DS1S 0x40
#define _DS1E 0x7E
#define _DS2S 0x80
#define _DS2E 0xFE
#elif _CODE_PAGE == 949 /* Korean */
#define _DF1S 0x81
#define _DF1E 0xFE
#define _DS1S 0x41
#define _DS1E 0x5A
#define _DS2S 0x61
#define _DS2E 0x7A
#define _DS3S 0x81
#define _DS3E 0xFE
#elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
#define _DF1S 0x81
#define _DF1E 0xFE
#define _DS1S 0x40
#define _DS1E 0x7E
#define _DS2S 0xA1
#define _DS2E 0xFE
#elif _CODE_PAGE == 437 /* U.S. (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 720 /* Arabic (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 737 /* Greek (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 775 /* Baltic (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \
0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
#elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
#define _DF1S 0
#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 857 /* Turkish (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 862 /* Hebrew (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 866 /* Russian (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
#elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF}
#elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
#elif _CODE_PAGE == 1253 /* Greek (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \
0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF}
#elif _CODE_PAGE == 1254 /* Turkish (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
#elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 1256 /* Arabic (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 1257 /* Baltic (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
#elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F}
#elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
#if _USE_LFN
#error Cannot use LFN feature without valid code page.
#endif
#define _DF1S 0
#else
#error Unknown code page
#endif
/* Character code support macros */
#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
#define IsLower(c) (((c)>='a')&&((c)<='z'))
#define IsDigit(c) (((c)>='0')&&((c)<='9'))
#if _DF1S /* Code page is DBCS */
#ifdef _DF2S /* Two 1st byte areas */
#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
#else /* One 1st byte area */
#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
#endif
#ifdef _DS3S /* Three 2nd byte areas */
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
#else /* Two 2nd byte areas */
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
#endif
#else /* Code page is SBCS */
#define IsDBCS1(c) 0
#define IsDBCS2(c) 0
#endif /* _DF1S */
/* Name status flags */
#define NSFLAG 11 /* Index of name status byte in fn[] */
#define NS_LOSS 0x01 /* Out of 8.3 format */
#define NS_LFN 0x02 /* Force to create LFN entry */
#define NS_LAST 0x04 /* Last segment */
#define NS_BODY 0x08 /* Lower case flag (body) */
#define NS_EXT 0x10 /* Lower case flag (ext) */
#define NS_DOT 0x20 /* Dot entry */
/* FAT sub-type boundaries (Differ from specs but correct for real DOS/Windows) */
#define MIN_FAT16 4086U /* Minimum number of clusters as FAT16 */
#define MIN_FAT32 65526U /* Minimum number of clusters as FAT32 */
/* FatFs refers the members in the FAT structures as byte array instead of
/ structure member because the structure is not binary compatible between
/ different platforms */
#define BS_jmpBoot 0 /* x86 jump instruction (3) */
#define BS_OEMName 3 /* OEM name (8) */
#define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
#define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
#define BPB_NumFATs 16 /* Number of FAT copies (1) */
#define BPB_RootEntCnt 17 /* Number of root directory entries for FAT12/16 (2) */
#define BPB_TotSec16 19 /* Volume size [sector] (2) */
#define BPB_Media 21 /* Media descriptor (1) */
#define BPB_FATSz16 22 /* FAT size [sector] (2) */
#define BPB_SecPerTrk 24 /* Track size [sector] (2) */
#define BPB_NumHeads 26 /* Number of heads (2) */
#define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
#define BPB_TotSec32 32 /* Volume size [sector] (4) */
#define BS_DrvNum 36 /* Physical drive number (2) */
#define BS_BootSig 38 /* Extended boot signature (1) */
#define BS_VolID 39 /* Volume serial number (4) */
#define BS_VolLab 43 /* Volume label (8) */
#define BS_FilSysType 54 /* File system type (1) */
#define BPB_FATSz32 36 /* FAT size [sector] (4) */
#define BPB_ExtFlags 40 /* Extended flags (2) */
#define BPB_FSVer 42 /* File system version (2) */
#define BPB_RootClus 44 /* Root directory first cluster (4) */
#define BPB_FSInfo 48 /* Offset of FSINFO sector (2) */
#define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */
#define BS_DrvNum32 64 /* Physical drive number (2) */
#define BS_BootSig32 66 /* Extended boot signature (1) */
#define BS_VolID32 67 /* Volume serial number (4) */
#define BS_VolLab32 71 /* Volume label (8) */
#define BS_FilSysType32 82 /* File system type (1) */
#define FSI_LeadSig 0 /* FSI: Leading signature (4) */
#define FSI_StrucSig 484 /* FSI: Structure signature (4) */
#define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
#define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
#define MBR_Table 446 /* MBR: Partition table offset (2) */
#define SZ_PTE 16 /* MBR: Size of a partition table entry */
#define BS_55AA 510 /* Signature word (2) */
#define DIR_Name 0 /* Short file name (11) */
#define DIR_Attr 11 /* Attribute (1) */
#define DIR_NTres 12 /* Lower case flag (1) */
#define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */
#define DIR_CrtTime 14 /* Created time (2) */
#define DIR_CrtDate 16 /* Created date (2) */
#define DIR_LstAccDate 18 /* Last accessed date (2) */
#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
#define DIR_WrtTime 22 /* Modified time (2) */
#define DIR_WrtDate 24 /* Modified date (2) */
#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
#define DIR_FileSize 28 /* File size (4) */
#define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
#define LDIR_Attr 11 /* LFN attribute (1) */
#define LDIR_Type 12 /* LFN type (1) */
#define LDIR_Chksum 13 /* Sum of corresponding SFN entry */
#define LDIR_FstClusLO 26 /* Must be zero (0) */
#define SZ_DIRE 32 /* Size of a directory entry */
#define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
#define DDEM 0xE5 /* Deleted directory entry mark at DIR_Name[0] */
#define RDDEM 0x05 /* Replacement of the character collides with DDEM */
/*------------------------------------------------------------*/
/* Module private work area */
/*------------------------------------------------------------*/
/* Remark: Uninitialized variables with static duration are
/ guaranteed zero/null at start-up. If not, either the linker
/ or start-up routine being used is out of ANSI-C standard.
*/
#if _VOLUMES < 1 || _VOLUMES > 9
#error Wrong _VOLUMES setting
#endif
static FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
static WORD Fsid; /* File system mount ID */
#if _FS_RPATH && _VOLUMES >= 2
// dpgeorge: changed name and made public to support our volume names
BYTE ff_CurrVol; /* Current drive */
#endif
#if _FS_LOCK
static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */
#endif
#if _USE_LFN == 0 /* Non LFN feature */
#define DEFINE_NAMEBUF BYTE sfn[12]
#define INIT_BUF(dobj) (dobj).fn = sfn
#define FREE_BUF()
#else
#if _MAX_LFN < 12 || _MAX_LFN > 255
#error Wrong _MAX_LFN setting
#endif
#if _USE_LFN == 1 /* LFN feature with static working buffer */
static WCHAR LfnBuf[_MAX_LFN + 1];
#define DEFINE_NAMEBUF BYTE sfn[12]
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
#define FREE_BUF()
#elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */
#define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN + 1]
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
#define FREE_BUF()
#elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */
#define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR *lfn
#define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); (dobj).lfn = lfn; (dobj).fn = sfn; }
#define FREE_BUF() ff_memfree(lfn)
#else
#error Wrong _USE_LFN setting
#endif
#endif
#ifdef _EXCVT
static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for extended characters */
#endif
/*--------------------------------------------------------------------------
Module Private Functions
---------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* String functions */
/*-----------------------------------------------------------------------*/
// dpgeorge:
// We use stdlib version of memset and memcmp to reduce code size.
// We use the original custom version of mem_cpy so that gcc doesn't
// recognise the builtin function and then inline it. Allowing gcc
// to use the builtin memcpy increases code size by 72 bytes.
/* Copy memory to memory */
static
void mem_cpy (void* dst, const void* src, UINT cnt) {
BYTE *d = (BYTE*)dst;
const BYTE *s = (const BYTE*)src;
#if _WORD_ACCESS == 1
while (cnt >= sizeof (int)) {
*(int*)d = *(int*)s;
d += sizeof (int); s += sizeof (int);
cnt -= sizeof (int);
}
#endif
while (cnt--)
*d++ = *s++;
}
/* Fill memory */
#if 0 // dpgeorge: see comment above
static
void mem_set (void* dst, int val, UINT cnt) {
BYTE *d = (BYTE*)dst;
while (cnt--)
*d++ = (BYTE)val;
}
#else
// use stdlib
#define mem_set memset
#endif
/* Compare memory to memory */
#if 0 // dpgeorge: see comment above
static
int mem_cmp (const void* dst, const void* src, UINT cnt) {
const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
int r = 0;
while (cnt-- && (r = *d++ - *s++) == 0) ;
return r;
}
#else
// use stdlib
#define mem_cmp memcmp
#endif
/* Check if chr is contained in the string */
static
int chk_chr (const char* str, int chr) {
while (*str && *str != chr) str++;
return *str;
}
/*-----------------------------------------------------------------------*/
/* Request/Release grant to access the volume */
/*-----------------------------------------------------------------------*/
#if _FS_REENTRANT
static
int lock_fs (
FATFS* fs /* File system object */
)
{
return ff_req_grant(fs->sobj);
}
static
void unlock_fs (
FATFS* fs, /* File system object */
FRESULT res /* Result code to be returned */
)
{
if (fs &&
res != FR_NOT_ENABLED &&
res != FR_INVALID_DRIVE &&
res != FR_INVALID_OBJECT &&
res != FR_TIMEOUT) {
ff_rel_grant(fs->sobj);
}
}
#endif
/*-----------------------------------------------------------------------*/
/* File lock control functions */
/*-----------------------------------------------------------------------*/
#if _FS_LOCK
static
FRESULT chk_lock ( /* Check if the file can be accessed */
DIR* dp, /* Directory object pointing the file to be checked */
int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */
)
{
UINT i, be;
/* Search file semaphore table */
for (i = be = 0; i < _FS_LOCK; i++) {
if (Files[i].fs) { /* Existing entry */
if (Files[i].fs == dp->fs && /* Check if the object matched with an open object */
Files[i].clu == dp->sclust &&
Files[i].idx == dp->index) break;
} else { /* Blank entry */
be = 1;
}
}
if (i == _FS_LOCK) /* The object is not opened */
return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */
/* The object has been opened. Reject any open against writing file and all write mode open */
return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
}
static
int enq_lock (void) /* Check if an entry is available for a new object */
{
UINT i;
for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
return (i == _FS_LOCK) ? 0 : 1;
}
static
UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
DIR* dp, /* Directory object pointing the file to register or increment */
int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
)
{
UINT i;
for (i = 0; i < _FS_LOCK; i++) { /* Find the object */
if (Files[i].fs == dp->fs &&
Files[i].clu == dp->sclust &&
Files[i].idx == dp->index) break;
}
if (i == _FS_LOCK) { /* Not opened. Register it as new. */
for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */
Files[i].fs = dp->fs;
Files[i].clu = dp->sclust;
Files[i].idx = dp->index;
Files[i].ctr = 0;
}
if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
return i + 1;
}
static
FRESULT dec_lock ( /* Decrement object open counter */
UINT i /* Semaphore index (1..) */
)
{
WORD n;
FRESULT res;
if (--i < _FS_LOCK) { /* Shift index number origin from 0 */
n = Files[i].ctr;
if (n == 0x100) n = 0; /* If write mode open, delete the entry */
if (n) n--; /* Decrement read mode open count */
Files[i].ctr = n;
if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */
res = FR_OK;
} else {
res = FR_INT_ERR; /* Invalid index nunber */
}
return res;
}
static
void clear_lock ( /* Clear lock entries of the volume */
FATFS *fs
)
{
UINT i;
for (i = 0; i < _FS_LOCK; i++) {
if (Files[i].fs == fs) Files[i].fs = 0;
}
}
#endif
/*-----------------------------------------------------------------------*/
/* Move/Flush disk access window in the file system object */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT sync_window (
FATFS* fs /* File system object */
)
{
DWORD wsect;
UINT nf;
FRESULT res = FR_OK;
if (fs->wflag) { /* Write back the sector if it is dirty */
wsect = fs->winsect; /* Current sector number */
if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) {
res = FR_DISK_ERR;
} else {
fs->wflag = 0;
if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */
for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */
wsect += fs->fsize;
disk_write(fs->drv, fs->win, wsect, 1);
}
}
}
}
return res;
}
#endif
static
FRESULT move_window (
FATFS* fs, /* File system object */
DWORD sector /* Sector number to make appearance in the fs->win[] */
)
{
FRESULT res = FR_OK;
if (sector != fs->winsect) { /* Window offset changed? */
#if !_FS_READONLY
res = sync_window(fs); /* Write-back changes */
#endif
if (res == FR_OK) { /* Fill sector window with new data */
if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) {
sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */
res = FR_DISK_ERR;
}
fs->winsect = sector;
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Synchronize file system and strage device */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT sync_fs ( /* FR_OK: successful, FR_DISK_ERR: failed */
FATFS* fs /* File system object */
)
{
FRESULT res;
res = sync_window(fs);
if (res == FR_OK) {
/* Update FSINFO sector if needed */
if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {
/* Create FSINFO structure */
mem_set(fs->win, 0, SS(fs));
ST_WORD(fs->win + BS_55AA, 0xAA55);
ST_DWORD(fs->win + FSI_LeadSig, 0x41615252);
ST_DWORD(fs->win + FSI_StrucSig, 0x61417272);
ST_DWORD(fs->win + FSI_Free_Count, fs->free_clust);
ST_DWORD(fs->win + FSI_Nxt_Free, fs->last_clust);
/* Write it into the FSINFO sector */
fs->winsect = fs->volbase + 1;
disk_write(fs->drv, fs->win, fs->winsect, 1);
fs->fsi_flag = 0;
}
/* Make sure that no pending write process in the physical drive */
if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
res = FR_DISK_ERR;
}
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* Get sector# from cluster# */
/*-----------------------------------------------------------------------*/
/* Hidden API for hacks and disk tools */
// dpgeorge: made static
static
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;
}
/*-----------------------------------------------------------------------*/
/* FAT access - Read value of a FAT entry */
/*-----------------------------------------------------------------------*/
/* Hidden API for hacks and disk tools */
// dpgeorge: made static
static
DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */
FATFS* fs, /* File system object */
DWORD clst /* FAT index number (cluster number) to get the value */
)
{
UINT wc, bc;
BYTE *p;
DWORD val;
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
val = 1; /* Internal error */
} else {
val = 0xFFFFFFFF; /* Default value falls on disk error */
switch (fs->fs_type) {
case FS_FAT12 :
bc = (UINT)clst; bc += bc / 2;
if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
wc = fs->win[bc++ % SS(fs)];
if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
wc |= fs->win[bc % SS(fs)] << 8;
val = clst & 1 ? wc >> 4 : (wc & 0xFFF);
break;
case FS_FAT16 :
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
p = &fs->win[clst * 2 % SS(fs)];
val = LD_WORD(p);
break;
case FS_FAT32 :
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
p = &fs->win[clst * 4 % SS(fs)];
val = LD_DWORD(p) & 0x0FFFFFFF;
break;
default:
val = 1; /* Internal error */
}
}
return val;
}
/*-----------------------------------------------------------------------*/
/* FAT access - Change value of a FAT entry */
/*-----------------------------------------------------------------------*/
/* Hidden API for hacks and disk tools */
#if !_FS_READONLY
// dpgeorge: made static
static
FRESULT put_fat (
FATFS* fs, /* File system object */
DWORD clst, /* FAT index number (cluster number) to be changed */
DWORD val /* New value to be set to the entry */
)
{
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 = (UINT)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;
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));
fs->wflag = 1;
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);
fs->wflag = 1;
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);
fs->wflag = 1;
break;
default :
res = FR_INT_ERR;
}
}
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 _USE_TRIM
DWORD scl = clst, ecl = clst, rt[2];
#endif
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;
}
#if _USE_TRIM
if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
ecl = nxt;
} else { /* End of contiguous clusters */
rt[0] = clust2sect(fs, scl); /* Start sector */
rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Erase the block */
scl = ecl = nxt;
}
#endif
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;
FRESULT res;
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; /* Invalid value */
if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */
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) { /* Check 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 */
}
res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
if (res == FR_OK && clst != 0) {
res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */
}
if (res == FR_OK) {
fs->last_clust = ncl; /* Update FSINFO */
if (fs->free_clust != 0xFFFFFFFF) {
fs->free_clust--;
fs->fsi_flag |= 1;
}
} else {
ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
}
return ncl; /* Return new cluster number or error code */
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* FAT handling - Convert offset into cluster with link map table */
/*-----------------------------------------------------------------------*/
#if _USE_FASTSEEK
static
DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
FIL* fp, /* Pointer to the file object */
DWORD ofs /* File offset to be converted to cluster# */
)
{
DWORD cl, ncl, *tbl;
tbl = fp->cltbl + 1; /* Top of CLMT */
cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */
for (;;) {
ncl = *tbl++; /* Number of cluters in the fragment */
if (!ncl) return 0; /* End of table? (error) */
if (cl < ncl) break; /* In this fragment? */
cl -= ncl; tbl++; /* Next fragment */
}
return cl + *tbl; /* Return the cluster number */
}
#endif /* _USE_FASTSEEK */
/*-----------------------------------------------------------------------*/
/* Directory handling - Set directory index */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_sdi (
DIR* dp, /* Pointer to directory object */
UINT idx /* Index of directory table */
)
{
DWORD clst, sect;
UINT ic;
dp->index = (WORD)idx; /* Current index */
clst = dp->sclust; /* Table start cluster (0:root) */
if (clst == 1 || clst >= dp->fs->n_fatent) /* Check start cluster range */
return FR_INT_ERR;
if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
clst = dp->fs->dirbase;
if (clst == 0) { /* Static table (root-directory in FAT12/16) */
if (idx >= dp->fs->n_rootdir) /* Is index out of range? */
return FR_INT_ERR;
sect = dp->fs->dirbase;
}
else { /* Dynamic table (root-directory in FAT32 or sub-directory) */
ic = SS(dp->fs) / SZ_DIRE * dp->fs->csize; /* Entries per cluster */
while (idx >= ic) { /* Follow cluster chain */
clst = get_fat(dp->fs, clst); /* Get next cluster */
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
if (clst < 2 || clst >= dp->fs->n_fatent) /* Reached to end of table or internal error */
return FR_INT_ERR;
idx -= ic;
}
sect = clust2sect(dp->fs, clst);
}
dp->clust = clst; /* Current cluster# */
if (!sect) return FR_INT_ERR;
dp->sect = sect + idx / (SS(dp->fs) / SZ_DIRE); /* Sector# of the directory entry */
dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Ptr to the entry in the sector */
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Directory handling - Move directory table index next */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
DIR* dp, /* Pointer to the directory object */
int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
)
{
DWORD clst;
UINT i;
#if !_FS_READONLY
UINT c;
#endif
i = dp->index + 1;
if (!(i & 0xFFFF) || !dp->sect) /* Report EOT when index has reached 65535 */
return FR_NO_FILE;
if (!(i % (SS(dp->fs) / SZ_DIRE))) { /* Sector changed? */
dp->sect++; /* Next sector */
if (!dp->clust) { /* Static table */
if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */
return FR_NO_FILE;
}
else { /* Dynamic table */
if (((i / (SS(dp->fs) / SZ_DIRE)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */
clst = get_fat(dp->fs, dp->clust); /* Get next cluster */
if (clst <= 1) return FR_INT_ERR;
if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */
#if !_FS_READONLY
if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */
clst = create_chain(dp->fs, dp->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 (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */
mem_set(dp->fs->win, 0, SS(dp->fs)); /* Clear window buffer */
dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */
for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */
dp->fs->wflag = 1;
if (sync_window(dp->fs)) return FR_DISK_ERR;
dp->fs->winsect++;
}
dp->fs->winsect -= c; /* Rewind window offset */
#else
if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT (this is to suppress warning) */
return FR_NO_FILE; /* Report EOT */
#endif
}
dp->clust = clst; /* Initialize data for new cluster */
dp->sect = clust2sect(dp->fs, clst);
}
}
}
dp->index = (WORD)i; /* Current index */
dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Current entry in the window */
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Directory handling - Reserve directory entry */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT dir_alloc (
DIR* dp, /* Pointer to the directory object */
UINT nent /* Number of contiguous entries to allocate (1-21) */
)
{
FRESULT res;
UINT n;
res = dir_sdi(dp, 0);
if (res == FR_OK) {
n = 0;
do {
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
if (dp->dir[0] == DDEM || dp->dir[0] == 0) { /* Is it a free entry? */
if (++n == nent) break; /* A block of contiguous free entries is found */
} else {
n = 0; /* Not a blank entry. Restart to search */
}
res = dir_next(dp, 1); /* Next entry with table stretch enabled */
} while (res == FR_OK);
}
if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* Directory handling - Load/Store start cluster number */
/*-----------------------------------------------------------------------*/
static
DWORD ld_clust (
FATFS* fs, /* Pointer to the fs object */
BYTE* dir /* Pointer to the directory entry */
)
{
DWORD cl;
cl = LD_WORD(dir + DIR_FstClusLO);
if (fs->fs_type == FS_FAT32)
cl |= (DWORD)LD_WORD(dir + DIR_FstClusHI) << 16;
return cl;
}
#if !_FS_READONLY
static
void st_clust (
BYTE* dir, /* Pointer to the directory entry */
DWORD cl /* Value to be set */
)
{
ST_WORD(dir + DIR_FstClusLO, cl);
ST_WORD(dir + DIR_FstClusHI, cl >> 16);
}
#endif
/*-----------------------------------------------------------------------*/
/* 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 characters 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 */
)
{
UINT i, s;
WCHAR wc, uc;
i = ((dir[LDIR_Ord] & ~LLEF) - 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 character 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 characters in the entry are checked */
if ((dir[LDIR_Ord] & LLEF) && 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 */
)
{
UINT 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 character 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] & LLEF) { /* 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 */
)
{
UINT 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 character */
ST_WORD(dir+LfnOfs[s], wc); /* Put it */
if (!wc) wc = 0xFFFF; /* Padding characters following last character */
} while (++s < 13);
if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLEF; /* 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
static
void gen_numname (
BYTE* dst, /* Pointer to the buffer to store numbered SFN */
const BYTE* src, /* Pointer to SFN */
const WCHAR* lfn, /* Pointer to LFN */
UINT seq /* Sequence number */
)
{
BYTE ns[8], c;
UINT i, j;
WCHAR wc;
DWORD sr;
mem_cpy(dst, src, 11);
if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
sr = seq;
while (*lfn) { /* Create a CRC */
wc = *lfn++;
for (i = 0; i < 16; i++) {
sr = (sr << 1) + (wc & 1);
wc >>= 1;
if (sr & 0x10000) sr ^= 0x11021;
}
}
seq = (UINT)sr;
}
/* itoa (hexdecimal) */
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 /* Pointer to the SFN entry */
)
{
BYTE sum = 0;
UINT 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* dp /* 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(dp, 0); /* Rewind directory object */
if (res != FR_OK) return res;
#if _USE_LFN
ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
#endif
do {
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
dir = dp->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 == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
} else {
if (a == AM_LFN) { /* An LFN entry is found */
if (dp->lfn) {
if (c & LLEF) { /* Is it start of LFN sequence? */
sum = dir[LDIR_Chksum];
c &= ~LLEF; ord = c; /* LFN start order */
dp->lfn_idx = dp->index; /* Start index of LFN */
}
/* Check validity of the LFN entry and compare it with given name */
ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
}
} else { /* An SFN entry is found */
if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */
ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
}
}
#else /* Non LFN configuration */
if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */
break;
#endif
res = dir_next(dp, 0); /* Next entry */
} while (res == FR_OK);
return res;
}
/*-----------------------------------------------------------------------*/
/* Read an object from the directory */
/*-----------------------------------------------------------------------*/
#if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2
static
FRESULT dir_read (
DIR* dp, /* Pointer to the directory object */
int vol /* Filtered by 0:file/directory or 1:volume label */
)
{
FRESULT res;
BYTE a, c, *dir;
#if _USE_LFN
BYTE ord = 0xFF, sum = 0xFF;
#endif
res = FR_NO_FILE;
while (dp->sect) {
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
dir = dp->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 */
a = dir[DIR_Attr] & AM_MASK;
#if _USE_LFN /* LFN configuration */
if (c == DDEM || (!_FS_RPATH && c == '.') || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
ord = 0xFF;
} else {
if (a == AM_LFN) { /* An LFN entry is found */
if (c & LLEF) { /* Is it start of LFN sequence? */
sum = dir[LDIR_Chksum];
c &= ~LLEF; ord = c;
dp->lfn_idx = dp->index;
}
/* Check LFN validity and capture it */
ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
} else { /* An SFN entry is found */
if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
dp->lfn_idx = 0xFFFF; /* It has no LFN. */
break;
}
}
#else /* Non LFN configuration */
if (c != DDEM && (_FS_RPATH || c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) /* Is it a valid entry? */
break;
#endif
res = dir_next(dp, 0); /* Next entry */
if (res != FR_OK) break;
}
if (res != FR_OK) dp->sect = 0;
return res;
}
#endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */
/*-----------------------------------------------------------------------*/
/* 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* dp /* Target directory with object name to be created */
)
{
FRESULT res;
#if _USE_LFN /* LFN configuration */
UINT n, nent;
BYTE sn[12], *fn, sum;
WCHAR *lfn;
fn = dp->fn; lfn = dp->lfn;
mem_cpy(sn, fn, 12);
if (_FS_RPATH && (sn[NSFLAG] & NS_DOT)) /* Cannot create dot entry */
return FR_INVALID_NAME;
if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
fn[NSFLAG] = 0; dp->lfn = 0; /* Find only SFN */
for (n = 1; n < 100; n++) {
gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
res = dir_find(dp); /* 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[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn;
}
if (sn[NSFLAG] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */
for (n = 0; lfn[n]; n++) ;
nent = (n + 25) / 13;
} else { /* Otherwise allocate an entry for an SFN */
nent = 1;
}
res = dir_alloc(dp, nent); /* Allocate entries */
if (res == FR_OK && --nent) { /* Set LFN entry if needed */
res = dir_sdi(dp, dp->index - nent);
if (res == FR_OK) {
sum = sum_sfn(dp->fn); /* Sum value of the SFN tied to the LFN */
do { /* Store LFN entries in bottom first */
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum);
dp->fs->wflag = 1;
res = dir_next(dp, 0); /* Next entry */
} while (res == FR_OK && --nent);
}
}
#else /* Non LFN configuration */
res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
#endif
if (res == FR_OK) { /* Set SFN entry */
res = move_window(dp->fs, dp->sect);
if (res == FR_OK) {
mem_set(dp->dir, 0, SZ_DIRE); /* Clean the entry */
mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */
#if _USE_LFN
dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
#endif
dp->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* dp /* Directory object pointing the entry to be removed */
)
{
FRESULT res;
#if _USE_LFN /* LFN configuration */
UINT i;
i = dp->index; /* SFN index */
res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx); /* Goto the SFN or top of the LFN entries */
if (res == FR_OK) {
do {
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
*dp->dir = DDEM;
dp->fs->wflag = 1;
if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
res = dir_next(dp, 0); /* Next entry */
} while (res == FR_OK);
if (res == FR_NO_FILE) res = FR_INT_ERR;
}
#else /* Non LFN configuration */
res = dir_sdi(dp, dp->index);
if (res == FR_OK) {
res = move_window(dp->fs, dp->sect);
if (res == FR_OK) {
mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
*dp->dir = DDEM;
dp->fs->wflag = 1;
}
}
#endif
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Get file information from directory entry */
/*-----------------------------------------------------------------------*/
#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
static
void get_fileinfo ( /* No return code */
DIR* dp, /* Pointer to the directory object */
FILINFO* fno /* Pointer to the file information to be filled */
)
{
UINT i;
TCHAR *p, c;
BYTE *dir;
#if _USE_LFN
WCHAR w, *lfn;
#endif
p = fno->fname;
if (dp->sect) { /* Get SFN */
dir = dp->dir;
i = 0;
while (i < 11) { /* Copy name body and extension */
c = (TCHAR)dir[i++];
if (c == ' ') continue; /* Skip padding spaces */
if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
if (i == 9) *p++ = '.'; /* Insert a . if extension is exist */
#if _USE_LFN
if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY)))
c += 0x20; /* To lower */
#if _LFN_UNICODE
if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i]))
c = c << 8 | dir[i++];
c = ff_convert(c, 1); /* OEM -> Unicode */
if (!c) c = '?';
#endif
#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; /* Terminate SFN string by a \0 */
#if _USE_LFN
if (fno->lfname) {
i = 0; p = fno->lfname;
if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */
lfn = dp->lfn;
while ((w = *lfn++) != 0) { /* Get an LFN character */
#if !_LFN_UNICODE
w = ff_convert(w, 0); /* Unicode -> OEM */
if (!w) { i = 0; break; } /* No LFN if it could not be converted */
if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
p[i++] = (TCHAR)(w >> 8);
#endif
if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */
p[i++] = (TCHAR)w;
}
}
p[i] = 0; /* Terminate LFN string by a \0 */
}
#endif
}
#endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */
/*-----------------------------------------------------------------------*/
/* Pattern matching */
/*-----------------------------------------------------------------------*/
#if _USE_FIND && _FS_MINIMIZE <= 1
static
WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */
const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */
)
{
WCHAR chr;
#if !_LFN_UNICODE
chr = (BYTE)*(*ptr)++; /* Get a byte */
if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
if (IsDBCS1(chr) && IsDBCS2(**ptr)) /* Get DBC 2nd byte if needed */
chr = chr << 8 | (BYTE)*(*ptr)++;
#ifdef _EXCVT
if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
#endif
#else
chr = ff_wtoupper(*(*ptr)++); /* Get a word and to upper */
#endif
return chr;
}
static
int pattern_matching ( /* Return value: 0:mismatched, 1:matched */
const TCHAR* pat, /* Matching pattern */
const TCHAR* nam, /* String to be tested */
int skip, /* Number of pre-skip chars (number of ?s) */
int inf /* Infinite search (* specified) */
)
{
const TCHAR *pp, *np;
WCHAR pc, nc;
int nm, nx;
while (skip--) { /* Pre-skip name chars */
if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
}
if (!*pat && inf) return 1; /* (short circuit) */
do {
pp = pat; np = nam; /* Top of pattern and name to match */
for (;;) {
if (*pp == '?' || *pp == '*') { /* Wildcard? */
nm = nx = 0;
do { /* Analyze the wildcard chars */
if (*pp++ == '?') nm++; else nx = 1;
} while (*pp == '?' || *pp == '*');
if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
nc = *np; break; /* Branch mismatched */
}
pc = get_achar(&pp); /* Get a pattern char */
nc = get_achar(&np); /* Get a name char */
if (pc != nc) break; /* Branch mismatched? */
if (!pc) return 1; /* Branch matched? (matched at end of both strings) */
}
get_achar(&nam); /* nam++ */
} while (inf && nc); /* Retry until end of name if infinite search is specified */
return 0;
}
#endif /* _USE_FIND && _FS_MINIMIZE <= 1 */
/*-----------------------------------------------------------------------*/
/* Pick a segment and create the object name in directory form */
/*-----------------------------------------------------------------------*/
static
FRESULT create_name (
DIR* dp, /* Pointer to the directory object */
const TCHAR** path /* Pointer to pointer to the segment in the path string */
)
{
#if _USE_LFN /* LFN configuration */
BYTE b, cf;
WCHAR w, *lfn;
UINT i, ni, si, di;
const TCHAR *p;
/* Create LFN in Unicode */
for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
lfn = dp->lfn;
si = di = 0;
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)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
b = (BYTE)p[si++]; /* Get 2nd byte */
w = (w << 8) + b; /* Create a DBC */
if (!IsDBCS2(b))
return FR_INVALID_NAME; /* Reject invalid sequence */
}
w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
if (!w) return FR_INVALID_NAME; /* Reject invalid code */
#endif
if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */
return FR_INVALID_NAME;
lfn[di++] = w; /* Store the Unicode character */
}
*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++)
dp->fn[i] = (i < di) ? '.' : ' ';
dp->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 nul string */
lfn[di] = 0; /* LFN is created */
/* Create SFN in directory form */
mem_set(dp->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 character */
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 character */
#ifdef _EXCVT
w = ff_convert(w, 0); /* Unicode -> OEM code */
if (w) w = ExCvt[w - 0x80]; /* Convert extended character 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) { /* DBC (always false at SBCS cfg) */
if (i >= ni - 1) {
cf |= NS_LOSS | NS_LFN; i = ni; continue;
}
dp->fn[i++] = (BYTE)(w >> 8);
} else { /* SBC */
if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters 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;
}
}
}
}
dp->fn[i++] = (BYTE)w;
}
if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with deleted mark, replace it with RDDEM */
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 character, 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) */
}
dp->fn[NSFLAG] = cf; /* SFN is created */
return FR_OK;
#else /* Non-LFN configuration */
BYTE b, c, d, *sfn;
UINT ni, si, i;
const char *p;
/* Create file name in directory form */
for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
sfn = dp->fn;
mem_set(sfn, ' ', 11);
si = i = b = 0; ni = 8;
#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[NSFLAG] = (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 character? */
b |= 3; /* Eliminate NT flag */
#ifdef _EXCVT
c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */
#else
#if !_DF1S
return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */
#endif
#endif
}
if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
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 { /* SBC */
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 nul string */
if (sfn[0] == DDEM) sfn[0] = RDDEM; /* When first character collides with DDEM, replace it with RDDEM */
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[NSFLAG] = c; /* Store NT flag, File name is created */
return FR_OK;
#endif
}
/*-----------------------------------------------------------------------*/
/* Follow a file path */
/*-----------------------------------------------------------------------*/
static
FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
DIR* dp, /* 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++; dp->sclust = 0; /* Strip it and start from the root directory */
} else { /* No heading separator */
dp->sclust = dp->fs->cdir; /* Start from the current directory */
}
#else
if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
path++;
dp->sclust = 0; /* Always start from the root directory */
#endif
if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
res = dir_sdi(dp, 0);
dp->dir = 0;
} else { /* Follow path */
for (;;) {
res = create_name(dp, &path); /* Get a segment name of the path */
if (res != FR_OK) break;
res = dir_find(dp); /* Find an object with the sagment name */
ns = dp->fn[NSFLAG];
if (res != FR_OK) { /* Failed to find the object */
if (res == FR_NO_FILE) { /* Object is not found */
if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */
dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */
if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
res = FR_OK; /* Ended at the root directroy. Function completed. */
} else { /* Could not find the object */
if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
}
}
break;
}
if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
dir = dp->dir; /* Follow the sub-directory */
if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */
res = FR_NO_PATH; break;
}
dp->sclust = ld_clust(dp->fs, dir);
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Get logical drive number from path name */
/*-----------------------------------------------------------------------*/
#if 0 // dpgeorge: replaced with custom ff_get_ldnumber
static
int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */
const TCHAR** path /* Pointer to pointer to the path name */
)
{
const TCHAR *tp, *tt;
UINT i;
int vol = -1;
#if _STR_VOLUME_ID /* Find string drive id */
static const char* const str[] = {_VOLUME_STRS};
const char *sp;
char c;
TCHAR tc;
#endif
if (*path) { /* If the pointer is not a null */
for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */
if (*tt == ':') { /* If a ':' is exist in the path name */
tp = *path;
i = *tp++ - '0';
if (i < 10 && tp == tt) { /* Is there a numeric drive id? */
if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
vol = (int)i;
*path = ++tt;
}
}
#if _STR_VOLUME_ID
else { /* No numeric drive number, find string drive id */
i = 0; tt++;
do {
sp = str[i]; tp = *path;
do { /* Compare a string drive id with path name */
c = *sp++; tc = *tp++;
if (IsLower(tc)) tc -= 0x20;
} while (c && (TCHAR)c == tc);
} while ((c || tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */
if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
vol = (int)i;
*path = tt;
}
}
#endif
return vol;
}
#if _FS_RPATH && _VOLUMES >= 2
vol = CurrVol; /* Current drive */
#else
vol = 0; /* Drive 0 */
#endif
}
return vol;
}
#endif // dpgeorge: replaced with custom ff_get_ldnumber
/*-----------------------------------------------------------------------*/
/* Load a sector and check if it is an FAT boot sector */
/*-----------------------------------------------------------------------*/
static
BYTE check_fs ( /* 0:FAT boor sector, 1:Valid boor sector but not FAT, 2:Not a boot sector, 3:Disk error */
FATFS* fs, /* File system object */
DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
)
{
fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
if (move_window(fs, sect) != FR_OK) /* Load boot record */
return 3;
if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check boot 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) /* Check "FAT" string */
return 0;
return 1;
}
/*-----------------------------------------------------------------------*/
/* Find logical drive and check if the volume is mounted */
/*-----------------------------------------------------------------------*/
static
FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */
FATFS** rfs, /* Pointer to pointer to the found file system object */
const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
BYTE wmode /* !=0: Check write protection for write access */
)
{
BYTE fmt, *pt;
int vol;
DSTATUS stat;
DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];
WORD nrsv;
FATFS *fs;
UINT i;
/* Get logical drive number from the path name */
*rfs = 0;
vol = ff_get_ldnumber(path); // dpgeorge: custom ff_get_ldnumber
if (vol < 0) return FR_INVALID_DRIVE;
/* Check if the file system object is valid or not */
fs = FatFs[vol]; /* Get pointer to the file system object */
if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
ENTER_FF(fs); /* Lock the volume */
*rfs = fs; /* Return pointer to the file system object */
if (fs->fs_type) { /* If the volume has been mounted */
stat = disk_status(fs->drv);
if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
return FR_WRITE_PROTECTED;
return FR_OK; /* The file system object is valid */
}
}
/* The file system object is not valid. */
/* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
fs->fs_type = 0; /* Clear the file system object */
fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */
stat = disk_initialize(fs->drv); /* Initialize the physical drive */
if (stat & STA_NOINIT) /* Check if the initialization succeeded */
return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
return FR_WRITE_PROTECTED;
#if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */
if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
|| SS(fs) < _MIN_SS || SS(fs) > _MAX_SS) return FR_DISK_ERR;
#endif
/* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */
bsect = 0;
fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */
if (fmt == 1 || (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */
for (i = 0; i < 4; i++) { /* Get partition offset */
pt = fs->win + MBR_Table + i * SZ_PTE;
br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0;
}
i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */
if (i) i--;
do { /* Find an FAT volume */
bsect = br[i];
fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */
} while (!LD2PT(vol) && fmt && ++i < 4);
}
if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
/* An 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 = fs->win[BPB_NumFATs]; /* Number of FAT copies */
if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */
return FR_NO_FILESYSTEM;
fasize *= fs->n_fats; /* Number of sectors for FAT area */
fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
if (!fs->csize || (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */
return FR_NO_FILESYSTEM;
fs->n_rootdir = LD_WORD(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
if (fs->n_rootdir % (SS(fs) / SZ_DIRE)) /* (Must be sector aligned) */
return FR_NO_FILESYSTEM;
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; /* (Must not be 0) */
/* Determine the FAT sub type */
sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIRE); /* 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->volbase = bsect; /* Volume start sector */
fs->fatbase = bsect + nrsv; /* FAT start sector */
fs->database = bsect + sysect; /* Data 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; /* (Needed 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) ? /* (Needed FAT size) */
fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
}
if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than the size needed) */
return FR_NO_FILESYSTEM;
#if !_FS_READONLY
/* Initialize cluster allocation information */
fs->last_clust = fs->free_clust = 0xFFFFFFFF;
/* Get fsinfo if available */
fs->fsi_flag = 0x80;
#if (_FS_NOFSINFO & 3) != 3
if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo is 1 */
&& LD_WORD(fs->win + BPB_FSInfo) == 1
&& move_window(fs, bsect + 1) == FR_OK)
{
fs->fsi_flag = 0;
if (LD_WORD(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */
&& LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252
&& LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272)
{
#if (_FS_NOFSINFO & 1) == 0
fs->free_clust = LD_DWORD(fs->win + FSI_Free_Count);
#endif
#if (_FS_NOFSINFO & 2) == 0
fs->last_clust = LD_DWORD(fs->win + FSI_Nxt_Free);
#endif
}
}
#endif
#endif
fs->fs_type = fmt; /* FAT sub-type */
fs->id = ++Fsid; /* File system mount ID */
#if _FS_RPATH
fs->cdir = 0; /* Set current directory to root */
#endif
#if _FS_LOCK /* Clear file lock semaphores */
clear_lock(fs);
#endif
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Check if the file/directory object is valid or not */
/*-----------------------------------------------------------------------*/
static
FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
void* obj /* Pointer to the object FIL/DIR to check validity */
)
{
FIL *fil = (FIL*)obj; /* Assuming offset of .fs and .id in the FIL/DIR structure is identical */
if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id || (disk_status(fil->fs->drv) & STA_NOINIT))
return FR_INVALID_OBJECT;
ENTER_FF(fil->fs); /* Lock file system */
return FR_OK;
}
/*--------------------------------------------------------------------------
Public Functions
--------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* Mount/Unmount a Logical Drive */
/*-----------------------------------------------------------------------*/
FRESULT f_mount (
FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/
const TCHAR* path, /* Logical drive number to be mounted/unmounted */
BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */
)
{
FATFS *cfs;
int vol;
FRESULT res;
const TCHAR *rp = path;
vol = ff_get_ldnumber(&rp); // dpgeorge: custom ff_get_ldnumber
if (vol < 0) return FR_INVALID_DRIVE;
cfs = FatFs[vol]; /* Pointer to fs object */
if (cfs) {
#if _FS_LOCK
clear_lock(cfs);
#endif
#if _FS_REENTRANT /* Discard sync object of the current volume */
if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
#endif
cfs->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((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
#endif
}
FatFs[vol] = fs; /* Register new fs object */
if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */
res = find_volume(&fs, &path, 0); /* Force mounted the volume */
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* 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;
DEFINE_NAMEBUF;
#if !_FS_READONLY
DWORD dw, cl;
#endif
if (!fp) return FR_INVALID_OBJECT;
fp->fs = 0; /* Clear file object */
/* Get logical drive number */
#if !_FS_READONLY
mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ));
#else
mode &= FA_READ;
res = find_volume(&dj.fs, &path, 0);
#endif
if (res == FR_OK) {
INIT_BUF(dj);
res = follow_path(&dj, path); /* Follow the file path */
dir = dj.dir;
#if !_FS_READONLY /* R/W configuration */
if (res == FR_OK) {
if (!dir) /* Default directory itself */
res = FR_INVALID_NAME;
#if _FS_LOCK
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)) {
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_LOCK
res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
#else
res = dir_register(&dj);
#endif
mode |= FA_CREATE_ALWAYS; /* File is created */
dir = dj.dir; /* New entry */
}
else { /* Any object is already existing */
if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
res = FR_DENIED;
} else {
if (mode & FA_CREATE_NEW) /* Cannot create as new file */
res = FR_EXIST;
}
}
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 = ld_clust(dj.fs, dir); /* Get start cluster */
st_clust(dir, 0); /* cluster = 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_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
mode |= FA__WRITTEN;
fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
fp->dir_ptr = dir;
#if _FS_LOCK
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 */
dir = dj.dir;
if (!dir) { /* Current directory 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->err = 0; /* Clear error flag */
fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */
fp->fsize = LD_DWORD(dir + DIR_FileSize); /* File size */
fp->fptr = 0; /* File pointer */
fp->dsect = 0;
#if _USE_FASTSEEK
fp->cltbl = 0; /* Normal seek mode */
#endif
fp->fs = dj.fs; /* Validate file object */
fp->id = fp->fs->id;
}
}
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 = (BYTE*)buff;
*br = 0; /* Clear read byte counter */
res = validate(fp); /* Check validity */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->err) /* Check error */
LEAVE_FF(fp->fs, (FRESULT)fp->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 read */
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? */
if (fp->fptr == 0) { /* On the top of the file? */
clst = fp->sclust; /* Follow from the origin */
} else { /* Middle or end of the file */
#if _USE_FASTSEEK
if (fp->cltbl)
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
else
#endif
clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */
}
if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->clust = clst; /* Update current cluster */
}
sect = clust2sect(fp->fs, fp->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, 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 (fp->dsect != sect) { /* Load data sector if not in cache */
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
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, sect, 1) != RES_OK) /* Fill sector cache */
ABORT(fp->fs, FR_DISK_ERR);
}
#endif
fp->dsect = sect;
}
rcnt = SS(fp->fs) - ((UINT)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) != FR_OK) /* Move sector window */
ABORT(fp->fs, FR_DISK_ERR);
mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
#else
mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
#endif
}
LEAVE_FF(fp->fs, FR_OK);
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Write File */
/*-----------------------------------------------------------------------*/
FRESULT f_write (
FIL* fp, /* Pointer to the file object */
const void *buff, /* Pointer to the data to be written */
UINT btw, /* Number of bytes to write */
UINT* bw /* Pointer to number of bytes written */
)
{
FRESULT res;
DWORD clst, sect;
UINT wcnt, cc;
const BYTE *wbuff = (const BYTE*)buff;
BYTE csect;
*bw = 0; /* Clear write byte counter */
res = validate(fp); /* Check validity */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->err) /* Check error */
LEAVE_FF(fp->fs, (FRESULT)fp->err);
if (!(fp->flag & FA_WRITE)) /* Check access mode */
LEAVE_FF(fp->fs, FR_DENIED);
if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */
for ( ; btw; /* Repeat until all data written */
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->sclust; /* Follow from the origin */
if (clst == 0) /* When no cluster is allocated, */
clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
} else { /* Middle or end of the file */
#if _USE_FASTSEEK
if (fp->cltbl)
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
else
#endif
clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
}
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->clust = clst; /* Update current cluster */
if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */
}
#if _FS_TINY
if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */
ABORT(fp->fs, FR_DISK_ERR);
#else
if (fp->flag & FA__DIRTY) { /* Write-back sector cache */
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->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, cc) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
#if _FS_MINIMIZE <= 2
#if _FS_TINY
if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated 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 invalidated by the direct write */
mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
fp->flag &= ~FA__DIRTY;
}
#endif
#endif
wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
continue;
}
#if _FS_TINY
if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */
if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR);
fp->fs->winsect = sect;
}
#else
if (fp->dsect != sect) { /* Fill sector cache 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) - ((UINT)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) != FR_OK) /* 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 change flag */
LEAVE_FF(fp->fs, FR_OK);
}
/*-----------------------------------------------------------------------*/
/* Synchronize the File */
/*-----------------------------------------------------------------------*/
FRESULT f_sync (
FIL* fp /* Pointer to the file object */
)
{
FRESULT res;
DWORD tm;
BYTE *dir;
res = validate(fp); /* Check validity of the object */
if (res == FR_OK) {
if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
/* Write-back dirty buffer */
#if !_FS_TINY
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_clust(dir, fp->sclust); /* Update start cluster */
tm = GET_FATTIME(); /* Update updated time */
ST_DWORD(dir + DIR_WrtTime, tm);
ST_WORD(dir + DIR_LstAccDate, 0);
fp->flag &= ~FA__WRITTEN;
fp->fs->wflag = 1;
res = sync_fs(fp->fs);
}
}
}
LEAVE_FF(fp->fs, res);
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Close File */
/*-----------------------------------------------------------------------*/
FRESULT f_close (
FIL *fp /* Pointer to the file object to be closed */
)
{
FRESULT res;
#if !_FS_READONLY
res = f_sync(fp); /* Flush cached data */
if (res == FR_OK)
#endif
{
res = validate(fp); /* Lock volume */
if (res == FR_OK) {
#if _FS_REENTRANT
FATFS *fs = fp->fs;
#endif
#if _FS_LOCK
res = dec_lock(fp->lockid); /* Decrement file open counter */
if (res == FR_OK)
#endif
fp->fs = 0; /* Invalidate file object */
#if _FS_REENTRANT
unlock_fs(fs, FR_OK); /* Unlock volume */
#endif
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Change Current Directory or Current Drive, Get Current Directory */
/*-----------------------------------------------------------------------*/
#if _FS_RPATH >= 1
#if _VOLUMES >= 2
FRESULT f_chdrive (
const TCHAR* path /* Drive number */
)
{
int vol;
vol = ff_get_ldnumber(&path); // dpgeorge: custom ff_get_ldnumber
if (vol < 0) return FR_INVALID_DRIVE;
ff_CurrVol = (BYTE)vol; // dpgeorge: custom ff_get_ldnumber
return FR_OK;
}
#endif
FRESULT f_chdir (
const TCHAR* path /* Pointer to the directory path */
)
{
FRESULT res;
DIR dj;
DEFINE_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 0);
if (res == FR_OK) {
INIT_BUF(dj);
res = follow_path(&dj, path); /* Follow the path */
FREE_BUF();
if (res == FR_OK) { /* Follow completed */
if (!dj.dir) {
dj.fs->cdir = dj.sclust; /* Start directory itself */
} else {
if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
dj.fs->cdir = ld_clust(dj.fs, dj.dir);
else
res = FR_NO_PATH; /* Reached but a file */
}
}
if (res == FR_NO_FILE) res = FR_NO_PATH;
}
LEAVE_FF(dj.fs, res);
}
#if _FS_RPATH >= 2
FRESULT f_getcwd (
TCHAR* buff, /* Pointer to the directory path */
UINT len /* Size of path */
)
{
FRESULT res;
DIR dj;
UINT i, n;
DWORD ccl;
TCHAR *tp;
FILINFO fno;
DEFINE_NAMEBUF;
*buff = 0;
/* Get logical drive number */
res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */
if (res == FR_OK) {
INIT_BUF(dj);
i = len; /* Bottom of buffer (directory stack base) */
dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */
while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
res = dir_sdi(&dj, 1); /* Get parent directory */
if (res != FR_OK) break;
res = dir_read(&dj, 0);
if (res != FR_OK) break;
dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */
res = dir_sdi(&dj, 0);
if (res != FR_OK) break;
do { /* Find the entry links to the child directory */
res = dir_read(&dj, 0);
if (res != FR_OK) break;
if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */
res = dir_next(&dj, 0);
} while (res == FR_OK);
if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
if (res != FR_OK) break;
#if _USE_LFN
fno.lfname = buff;
fno.lfsize = i;
#endif
get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
tp = fno.fname;
#if _USE_LFN
if (*buff) tp = buff;
#endif
for (n = 0; tp[n]; n++) ;
if (i < n + 3) {
res = FR_NOT_ENOUGH_CORE; break;
}
while (n) buff[--i] = tp[--n];
buff[--i] = '/';
}
tp = buff;
if (res == FR_OK) {
#if _VOLUMES >= 2
// dpgeorge: change to use our volume names
#if 0
*tp++ = '0' + CurrVol; /* Put drive number */
*tp++ = ':';
#else
ff_get_volname(ff_CurrVol, &tp);
#endif
#endif
if (i == len) { /* Root-directory */
// dpgeorge: not needed with volume names
#if 0
*tp++ = '/';
#endif
} else { /* Sub-directroy */
do /* Add stacked path str */
*tp++ = buff[i++];
while (i < len);
}
}
*tp = 0;
FREE_BUF();
}
LEAVE_FF(dj.fs, res);
}
#endif /* _FS_RPATH >= 2 */
#endif /* _FS_RPATH >= 1 */
#if _FS_MINIMIZE <= 2
/*-----------------------------------------------------------------------*/
/* Seek File R/W Pointer */
/*-----------------------------------------------------------------------*/
FRESULT f_lseek (
FIL* fp, /* Pointer to the file object */
DWORD ofs /* File pointer from top of file */
)
{
FRESULT res;
DWORD clst, bcs, nsect, ifptr;
#if _USE_FASTSEEK
DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
#endif
res = validate(fp); /* Check validity of the object */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->err) /* Check error */
LEAVE_FF(fp->fs, (FRESULT)fp->err);
#if _USE_FASTSEEK
if (fp->cltbl) { /* Fast seek */
if (ofs == CREATE_LINKMAP) { /* Create CLMT */
tbl = fp->cltbl;
tlen = *tbl++; ulen = 2; /* Given table size and required table size */
cl = fp->sclust; /* Top of the chain */
if (cl) {
do {
/* Get a fragment */
tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
do {
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);
if (ulen <= tlen) { /* Store the length and top of the fragment */
*tbl++ = ncl; *tbl++ = tcl;
}
} while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
}
*fp->cltbl = ulen; /* Number of items used */
if (ulen <= tlen)
*tbl = 0; /* Terminate table */
else
res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
} else { /* Fast seek */
if (ofs > fp->fsize) /* Clip offset at the file size */
ofs = fp->fsize;
fp->fptr = ofs; /* Set file pointer */
if (ofs) {
fp->clust = clmt_clust(fp, ofs - 1);
dsc = clust2sect(fp->fs, fp->clust);
if (!dsc) ABORT(fp->fs, FR_INT_ERR);
dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
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) /* Load current sector */
ABORT(fp->fs, FR_DISK_ERR);
#endif
fp->dsect = dsc;
}
}
}
} else
#endif
/* Normal Seek */
{
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->clust;
} else { /* When seek to back cluster, */
clst = fp->sclust; /* 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->sclust = clst;
}
#endif
fp->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->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) { /* Fill sector cache if needed */
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
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) /* Fill sector cache */
ABORT(fp->fs, FR_DISK_ERR);
#endif
fp->dsect = nsect;
}
#if !_FS_READONLY
if (fp->fptr > fp->fsize) { /* Set file change 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* dp, /* Pointer to directory object to create */
const TCHAR* path /* Pointer to the directory path */
)
{
FRESULT res;
FATFS* fs;
DEFINE_NAMEBUF;
if (!dp) return FR_INVALID_OBJECT;
/* Get logical drive number */
res = find_volume(&fs, &path, 0);
if (res == FR_OK) {
dp->fs = fs;
INIT_BUF(*dp);
res = follow_path(dp, path); /* Follow the path to the directory */
FREE_BUF();
if (res == FR_OK) { /* Follow completed */
if (dp->dir) { /* It is not the origin directory itself */
if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */
dp->sclust = ld_clust(fs, dp->dir);
else /* The object is a file */
res = FR_NO_PATH;
}
if (res == FR_OK) {
dp->id = fs->id;
res = dir_sdi(dp, 0); /* Rewind directory */
#if _FS_LOCK
if (res == FR_OK) {
if (dp->sclust) {
dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */
if (!dp->lockid)
res = FR_TOO_MANY_OPEN_FILES;
} else {
dp->lockid = 0; /* Root directory need not to be locked */
}
}
#endif
}
}
if (res == FR_NO_FILE) res = FR_NO_PATH;
}
if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Close Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_closedir (
DIR *dp /* Pointer to the directory object to be closed */
)
{
FRESULT res;
res = validate(dp);
if (res == FR_OK) {
#if _FS_REENTRANT
FATFS *fs = dp->fs;
#endif
#if _FS_LOCK
if (dp->lockid) /* Decrement sub-directory open counter */
res = dec_lock(dp->lockid);
if (res == FR_OK)
#endif
dp->fs = 0; /* Invalidate directory object */
#if _FS_REENTRANT
unlock_fs(fs, FR_OK); /* Unlock volume */
#endif
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Read Directory Entries in Sequence */
/*-----------------------------------------------------------------------*/
FRESULT f_readdir (
DIR* dp, /* Pointer to the open directory object */
FILINFO* fno /* Pointer to file information to return */
)
{
FRESULT res;
DEFINE_NAMEBUF;
res = validate(dp); /* Check validity of the object */
if (res == FR_OK) {
if (!fno) {
res = dir_sdi(dp, 0); /* Rewind the directory object */
} else {
INIT_BUF(*dp);
res = dir_read(dp, 0); /* Read an item */
if (res == FR_NO_FILE) { /* Reached end of directory */
dp->sect = 0;
res = FR_OK;
}
if (res == FR_OK) { /* A valid entry is found */
get_fileinfo(dp, fno); /* Get the object information */
res = dir_next(dp, 0); /* Increment index for next */
if (res == FR_NO_FILE) {
dp->sect = 0;
res = FR_OK;
}
}
FREE_BUF();
}
}
LEAVE_FF(dp->fs, res);
}
#if _USE_FIND
/*-----------------------------------------------------------------------*/
/* Find next file */
/*-----------------------------------------------------------------------*/
FRESULT f_findnext (
DIR* dp, /* Pointer to the open directory object */
FILINFO* fno /* Pointer to the file information structure */
)
{
FRESULT res;
for (;;) {
res = f_readdir(dp, fno); /* Get a directory item */
if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
#if _USE_LFN
if (fno->lfname && pattern_matching(dp->pat, fno->lfname, 0, 0)) break; /* Test for LFN if exist */
#endif
if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for SFN */
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Find first file */
/*-----------------------------------------------------------------------*/
FRESULT f_findfirst (
DIR* dp, /* Pointer to the blank directory object */
FILINFO* fno, /* Pointer to the file information structure */
const TCHAR* path, /* Pointer to the directory to open */
const TCHAR* pattern /* Pointer to the matching pattern */
)
{
FRESULT res;
dp->pat = pattern; /* Save pointer to pattern string */
res = f_opendir(dp, path); /* Open the target directory */
if (res == FR_OK)
res = f_findnext(dp, fno); /* Find the first item */
return res;
}
#endif /* _USE_FIND */
#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;
DEFINE_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 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 */
if (fno) get_fileinfo(&dj, fno);
} else { /* It is root directory */
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, /* Path name of the logical drive number */
DWORD* nclst, /* Pointer to a variable to return number of free clusters */
FATFS** fatfs /* Pointer to return pointer to corresponding file system object */
)
{
FRESULT res;
FATFS *fs;
DWORD n, clst, sect, stat;
UINT i;
BYTE fat, *p;
/* Get logical drive number */
res = find_volume(fatfs, &path, 0);
fs = *fatfs;
if (res == FR_OK) {
/* If free_clust is valid, return it without full cluster scan */
if (fs->free_clust <= fs->n_fatent - 2) {
*nclst = fs->free_clust;
} else {
/* Get number of free clusters */
fat = fs->fs_type;
n = 0;
if (fat == FS_FAT12) {
clst = 2;
do {
stat = get_fat(fs, clst);
if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
if (stat == 1) { res = FR_INT_ERR; break; }
if (stat == 0) n++;
} while (++clst < fs->n_fatent);
} else {
clst = fs->n_fatent;
sect = fs->fatbase;
i = 0; p = 0;
do {
if (!i) {
res = move_window(fs, sect++);
if (res != FR_OK) break;
p = fs->win;
i = SS(fs);
}
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);
}
fs->free_clust = n;
fs->fsi_flag |= 1;
*nclst = n;
}
}
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Truncate File */
/*-----------------------------------------------------------------------*/
FRESULT f_truncate (
FIL* fp /* Pointer to the file object */
)
{
FRESULT res;
DWORD ncl;
res = validate(fp); /* Check validity of the object */
if (res == FR_OK) {
if (fp->err) { /* Check error */
res = (FRESULT)fp->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->sclust);
fp->sclust = 0;
} else { /* When truncate a part of the file, remove remaining clusters */
ncl = get_fat(fp->fs, fp->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->clust, 0x0FFFFFFF);
if (res == FR_OK) res = remove_chain(fp->fs, ncl);
}
}
#if !_FS_TINY
if (res == FR_OK && (fp->flag & FA__DIRTY)) {
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
res = FR_DISK_ERR;
else
fp->flag &= ~FA__DIRTY;
}
#endif
}
if (res != FR_OK) fp->err = (FRESULT)res;
}
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 = 0;
DEFINE_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 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[NSFLAG] & NS_DOT))
res = FR_INVALID_NAME; /* Cannot remove dot entry */
#if _FS_LOCK
if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open object */
#endif
if (res == FR_OK) { /* The object is accessible */
dir = dj.dir;
if (!dir) {
res = FR_INVALID_NAME; /* Cannot remove the origin directory */
} else {
if (dir[DIR_Attr] & AM_RDO)
res = FR_DENIED; /* Cannot remove R/O object */
}
if (res == FR_OK) {
dclst = ld_clust(dj.fs, dir);
if (dclst && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-directory ? */
#if _FS_RPATH
if (dclst == dj.fs->cdir) { /* Is it the current directory? */
res = FR_DENIED;
} else
#endif
{
mem_cpy(&sdj, &dj, sizeof (DIR)); /* Open the sub-directory */
sdj.sclust = dclst;
res = dir_sdi(&sdj, 2);
if (res == FR_OK) {
res = dir_read(&sdj, 0); /* Read an item (excluding dot entries) */
if (res == FR_OK) res = FR_DENIED; /* Not empty? (cannot remove) */
if (res == FR_NO_FILE) res = FR_OK; /* Empty? (can remove) */
}
}
}
}
if (res == FR_OK) {
res = dir_remove(&dj); /* Remove the directory entry */
if (res == FR_OK && dclst) /* Remove the cluster chain if exist */
res = remove_chain(dj.fs, dclst);
if (res == FR_OK) res = sync_fs(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, tm = GET_FATTIME();
DEFINE_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 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[NSFLAG] & 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 = sync_window(dj.fs);
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, ' ', 11); /* Create "." entry */
dir[DIR_Name] = '.';
dir[DIR_Attr] = AM_DIR;
ST_DWORD(dir + DIR_WrtTime, tm);
st_clust(dir, dcl);
mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE); /* Create ".." entry */
dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust;
if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
pcl = 0;
st_clust(dir + SZ_DIRE, pcl);
for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
dj.fs->winsect = dsc++;
dj.fs->wflag = 1;
res = sync_window(dj.fs);
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 directoy */
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, tm); /* Created time */
st_clust(dir, dcl); /* Table start cluster */
dj.fs->wflag = 1;
res = sync_fs(dj.fs);
}
}
FREE_BUF();
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Change Attribute */
/*-----------------------------------------------------------------------*/
FRESULT f_chmod (
const TCHAR* path, /* Pointer to the file path */
BYTE attr, /* Attribute bits */
BYTE mask /* Attribute mask to change */
)
{
FRESULT res;
DIR dj;
BYTE *dir;
DEFINE_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 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[NSFLAG] & 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] = (attr & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
dj.fs->wflag = 1;
res = sync_fs(dj.fs);
}
}
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Rename File/Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_rename (
const TCHAR* path_old, /* Pointer to the object to be renamed */
const TCHAR* path_new /* Pointer to the new name */
)
{
FRESULT res;
DIR djo, djn;
BYTE buf[21], *dir;
DWORD dw;
DEFINE_NAMEBUF;
/* Get logical drive number of the source object */
res = find_volume(&djo.fs, &path_old, 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[NSFLAG] & NS_DOT))
res = FR_INVALID_NAME;
#if _FS_LOCK
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 information about object except name */
mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
// dpgeorge: custom ff_get_ldnumber
if (ff_get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */
res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */
else
res = FR_INVALID_DRIVE;
if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
res = dir_register(&djn); /* Register the new entry */
if (res == FR_OK) {
/* Start of critical section where any interruption can cause a cross-link */
dir = djn.dir; /* Copy information about object except name */
mem_cpy(dir + 13, buf + 2, 19);
dir[DIR_Attr] = buf[0] | AM_ARC;
djo.fs->wflag = 1;
if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */
dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
if (!dw) {
res = FR_INT_ERR;
} else {
res = move_window(djo.fs, dw);
dir = djo.fs->win + SZ_DIRE * 1; /* Ptr to .. entry */
if (res == FR_OK && dir[1] == '.') {
st_clust(dir, djn.sclust);
djo.fs->wflag = 1;
}
}
}
if (res == FR_OK) {
res = dir_remove(&djo); /* Remove old entry */
if (res == FR_OK)
res = sync_fs(djo.fs);
}
/* End of critical section */
}
}
}
}
FREE_BUF();
}
LEAVE_FF(djo.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Change Timestamp */
/*-----------------------------------------------------------------------*/
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;
DEFINE_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 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[NSFLAG] & 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_fs(dj.fs);
}
}
}
LEAVE_FF(dj.fs, res);
}
#endif /* !_FS_READONLY */
#endif /* _FS_MINIMIZE == 0 */
#endif /* _FS_MINIMIZE <= 1 */
#endif /* _FS_MINIMIZE <= 2 */
#if _USE_LABEL
/*-----------------------------------------------------------------------*/
/* Get volume label */
/*-----------------------------------------------------------------------*/
FRESULT f_getlabel (
const TCHAR* path, /* Path name of the logical drive number */
TCHAR* label, /* Pointer to a buffer to return the volume label */
DWORD* vsn /* Pointer to a variable to return the volume serial number */
)
{
FRESULT res;
DIR dj;
UINT i, j;
#if _USE_LFN && _LFN_UNICODE
WCHAR w;
#endif
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 0);
/* Get volume label */
if (res == FR_OK && label) {
dj.sclust = 0; /* Open root directory */
res = dir_sdi(&dj, 0);
if (res == FR_OK) {
res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
if (res == FR_OK) { /* A volume label is exist */
#if _USE_LFN && _LFN_UNICODE
i = j = 0;
do {
w = (i < 11) ? dj.dir[i++] : ' ';
if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i]))
w = w << 8 | dj.dir[i++];
label[j++] = ff_convert(w, 1); /* OEM -> Unicode */
} while (j < 11);
#else
mem_cpy(label, dj.dir, 11);
#endif
j = 11;
do {
label[j] = 0;
if (!j) break;
} while (label[--j] == ' ');
}
if (res == FR_NO_FILE) { /* No label, return nul string */
label[0] = 0;
res = FR_OK;
}
}
}
/* Get volume serial number */
if (res == FR_OK && vsn) {
res = move_window(dj.fs, dj.fs->volbase);
if (res == FR_OK) {
i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
*vsn = LD_DWORD(&dj.fs->win[i]);
}
}
LEAVE_FF(dj.fs, res);
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Set volume label */
/*-----------------------------------------------------------------------*/
FRESULT f_setlabel (
const TCHAR* label /* Pointer to the volume label to set */
)
{
FRESULT res;
DIR dj;
BYTE vn[11];
UINT i, j, sl;
WCHAR w;
DWORD tm;
/* Get logical drive number */
res = find_volume(&dj.fs, &label, 1);
if (res) LEAVE_FF(dj.fs, res);
/* Create a volume label in directory form */
vn[0] = 0;
if (label[0] == '/') label++; // dpgeorge: skip '/' to handle our volume names
for (sl = 0; label[sl]; sl++) ; /* Get name length */
for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */
if (sl) { /* Create volume label in directory form */
i = j = 0;
do {
#if _USE_LFN && _LFN_UNICODE
w = ff_convert(ff_wtoupper(label[i++]), 0);
#else
w = (BYTE)label[i++];
if (IsDBCS1(w))
w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
#if _USE_LFN
w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
#else
if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */
#ifdef _EXCVT
if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
#else
if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */
#endif
#endif
#endif
if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */
LEAVE_FF(dj.fs, FR_INVALID_NAME);
if (w >= 0x100) vn[j++] = (BYTE)(w >> 8);
vn[j++] = (BYTE)w;
} while (i < sl);
while (j < 11) vn[j++] = ' '; /* Fill remaining name field */
if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
}
/* Set volume label */
dj.sclust = 0; /* Open root directory */
res = dir_sdi(&dj, 0);
if (res == FR_OK) {
res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
if (res == FR_OK) { /* A volume label is found */
if (vn[0]) {
mem_cpy(dj.dir, vn, 11); /* Change the volume label name */
tm = GET_FATTIME();
ST_DWORD(dj.dir + DIR_WrtTime, tm);
} else {
dj.dir[0] = DDEM; /* Remove the volume label */
}
dj.fs->wflag = 1;
res = sync_fs(dj.fs);
} else { /* No volume label is found or error */
if (res == FR_NO_FILE) {
res = FR_OK;
if (vn[0]) { /* Create volume label as new */
res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */
if (res == FR_OK) {
mem_set(dj.dir, 0, SZ_DIRE); /* Set volume label */
mem_cpy(dj.dir, vn, 11);
dj.dir[DIR_Attr] = AM_VOL;
tm = GET_FATTIME();
ST_DWORD(dj.dir + DIR_WrtTime, tm);
dj.fs->wflag = 1;
res = sync_fs(dj.fs);
}
}
}
}
}
LEAVE_FF(dj.fs, res);
}
#endif /* !_FS_READONLY */
#endif /* _USE_LABEL */
/*-----------------------------------------------------------------------*/
/* 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 btf, /* 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; /* Clear transfer byte counter */
res = validate(fp); /* Check validity of the object */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->err) /* Check error */
LEAVE_FF(fp->fs, (FRESULT)fp->err);
if (!(fp->flag & FA_READ)) /* Check access mode */
LEAVE_FF(fp->fs, FR_DENIED);
remain = fp->fsize - fp->fptr;
if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
fp->fptr += rcnt, *bf += rcnt, btf -= 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->sclust : get_fat(fp->fs, fp->clust);
if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->clust = clst; /* Update current cluster */
}
}
sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */
if (!sect) ABORT(fp->fs, FR_INT_ERR);
sect += csect;
if (move_window(fp->fs, sect) != FR_OK) /* 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 > btf) rcnt = btf;
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 logical drive */
/*-----------------------------------------------------------------------*/
#define N_ROOTDIR 512 /* Number of root directory entries for FAT12/16 */
#define N_FATS 1 /* Number of FATs (1 or 2) */
FRESULT f_mkfs (
const TCHAR* path, /* Logical drive number */
BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
UINT au /* Size of allocation unit in unit of byte or sector */
)
{
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};
int vol;
BYTE fmt, md, sys, *tbl, pdrv, part;
DWORD n_clst, vs, n, wsect;
UINT i;
DWORD b_vol, b_fat, b_dir, b_data; /* LBA */
DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
FATFS *fs;
DSTATUS stat;
#if _USE_TRIM
DWORD eb[2];
#endif
/* Check mounted drive and clear work area */
if (sfd > 1) return FR_INVALID_PARAMETER;
vol = ff_get_ldnumber(&path); // dpgeorge: custom ff_get_ldnumber
if (vol < 0) return FR_INVALID_DRIVE;
fs = FatFs[vol];
if (!fs) return FR_NOT_ENABLED;
fs->fs_type = 0;
pdrv = LD2PD(vol); /* Physical drive */
part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/
/* Get disk statics */
stat = disk_initialize(pdrv);
if (stat & STA_NOINIT) return FR_NOT_READY;
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
#if _MAX_SS != _MIN_SS /* Get disk sector size */
if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS || SS(fs) < _MIN_SS)
return FR_DISK_ERR;
#endif
if (_MULTI_PARTITION && part) {
/* Get partition information from partition table in the MBR */
if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
if (LD_WORD(fs->win + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */
b_vol = LD_DWORD(tbl + 8); /* Volume start sector */
n_vol = LD_DWORD(tbl + 12); /* Volume size */
} else {
/* Create a partition in this function */
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 48) // dpgeorge: allow smaller minimum volume; 48 was 128
return FR_DISK_ERR;
b_vol = (sfd) ? 0 : 63; /* Volume start sector */
n_vol -= b_vol; /* Volume size */
}
if (au & (au - 1)) au = 0;
if (!au) { /* AU auto selection */
vs = n_vol / (2000 / (SS(fs) / 512));
for (i = 0; vs < vst[i]; i++) ;
au = cst[i];
}
if (au >= _MIN_SS) au /= SS(fs); /* Number of sectors per cluster */
if (!au) 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 = (DWORD)N_ROOTDIR * SZ_DIRE / 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 - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
/* Align data start sector to erase block boundary (for flash memory media) */
if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */
n = (n - b_data) / N_FATS;
if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */
n_rsv += n;
b_fat += n;
} else { /* FAT12/16: Expand FAT size */
n_fat += n;
}
/* Determine number of clusters 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;
/* Determine system ID in the partition table */
if (fmt == FS_FAT32) {
sys = 0x0C; /* FAT32X */
} else {
if (fmt == FS_FAT12 && n_vol < 0x10000) {
sys = 0x01; /* FAT12(<65536) */
} else {
sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */
}
}
if (_MULTI_PARTITION && part) {
/* Update system ID in the partition table */
tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
tbl[4] = sys;
if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to teh MBR */
return FR_DISK_ERR;
md = 0xF8;
} else {
if (sfd) { /* No partition table (SFD) */
md = 0xF0;
} else { /* Create partition table (FDISK) */
mem_set(fs->win, 0, SS(fs));
tbl = fs->win + MBR_Table; /* Create partition table for single partition in the drive */
tbl[1] = 1; /* Partition start head */
tbl[2] = 1; /* Partition start sector */
tbl[3] = 0; /* Partition start cylinder */
tbl[4] = sys; /* System type */
tbl[5] = 254; /* Partition end head */
n = (b_vol + n_vol) / 63 / 255;
tbl[6] = (BYTE)(n >> 2 | 63); /* Partition end sector */
tbl[7] = (BYTE)n; /* End cylinder */
ST_DWORD(tbl + 8, 63); /* Partition start in LBA */
ST_DWORD(tbl + 12, n_vol); /* Partition size in LBA */
ST_WORD(fs->win + BS_55AA, 0xAA55); /* MBR signature */
if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR */
return FR_DISK_ERR;
md = 0xF8;
}
}
/* Create BPB in the VBR */
tbl = fs->win; /* Clear sector */
mem_set(tbl, 0, SS(fs));
mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
i = SS(fs); /* Sector size */
ST_WORD(tbl + BPB_BytsPerSec, i);
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 */
i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of root directory entries */
ST_WORD(tbl + BPB_RootEntCnt, i);
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(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */
return FR_DISK_ERR;
if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR + 6) */
disk_write(pdrv, tbl, b_vol + 6, 1);
/* Initialize FAT area */
wsect = b_fat;
for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */
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 |= 0xFFFFFF00;
ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT32) */
ST_DWORD(tbl + 4, 0xFFFFFFFF);
ST_DWORD(tbl + 8, 0x0FFFFFFF); /* Reserve cluster #2 for root directory */
}
if (disk_write(pdrv, tbl, wsect++, 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 writes */
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
return FR_DISK_ERR;
}
}
/* Initialize root directory */
i = (fmt == FS_FAT32) ? au : (UINT)n_dir;
do {
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
return FR_DISK_ERR;
} while (--i);
#if _USE_TRIM /* Erase data area if needed */
{
eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
disk_ioctl(pdrv, CTRL_TRIM, eb);
}
#endif
/* Create FSINFO if needed */
if (fmt == FS_FAT32) {
ST_DWORD(tbl + FSI_LeadSig, 0x41615252);
ST_DWORD(tbl + FSI_StrucSig, 0x61417272);
ST_DWORD(tbl + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
ST_DWORD(tbl + FSI_Nxt_Free, 2); /* Last allocated cluster# */
ST_WORD(tbl + BS_55AA, 0xAA55);
disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR + 1) */
disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR + 7) */
}
return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
}
#if _MULTI_PARTITION
/*-----------------------------------------------------------------------*/
/* Create partition table on the physical drive */
/*-----------------------------------------------------------------------*/
FRESULT f_fdisk (
BYTE pdrv, /* Physical drive number */
const DWORD szt[], /* Pointer to the size table for each partitions */
void* work /* Pointer to the working buffer */
)
{
UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
DSTATUS stat;
DWORD sz_disk, sz_part, s_part;
stat = disk_initialize(pdrv);
if (stat & STA_NOINIT) return FR_NOT_READY;
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
/* Determine CHS in the table regardless of the drive geometry */
for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
if (n == 256) n--;
e_hd = n - 1;
sz_cyl = 63 * n;
tot_cyl = sz_disk / sz_cyl;
/* Create partition table */
mem_set(buf, 0, _MAX_SS);
p = buf + MBR_Table; b_cyl = 0;
for (i = 0; i < 4; i++, p += SZ_PTE) {
p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
if (!p_cyl) continue;
s_part = (DWORD)sz_cyl * b_cyl;
sz_part = (DWORD)sz_cyl * p_cyl;
if (i == 0) { /* Exclude first track of cylinder 0 */
s_hd = 1;
s_part += 63; sz_part -= 63;
} else {
s_hd = 0;
}
e_cyl = b_cyl + p_cyl - 1;
if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
/* Set partition table */
p[1] = s_hd; /* Start head */
p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */
p[3] = (BYTE)b_cyl; /* Start cylinder */
p[4] = 0x06; /* System type (temporary setting) */
p[5] = e_hd; /* End head */
p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */
p[7] = (BYTE)e_cyl; /* End cylinder */
ST_DWORD(p + 8, s_part); /* Start sector in LBA */
ST_DWORD(p + 12, sz_part); /* Partition size */
/* Next partition */
b_cyl += p_cyl;
}
ST_WORD(p, 0xAA55);
/* Write it to the MBR */
return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK;
}
#endif /* _MULTI_PARTITION */
#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* fp /* Pointer to the file object */
)
{
int n = 0;
TCHAR c, *p = buff;
BYTE s[2];
UINT rc;
while (n < len - 1) { /* Read characters until buffer gets filled */
#if _USE_LFN && _LFN_UNICODE
#if _STRF_ENCODE == 3 /* Read a character in UTF-8 */
f_read(fp, s, 1, &rc);
if (rc != 1) break;
c = s[0];
if (c >= 0x80) {
if (c < 0xC0) continue; /* Skip stray trailer */
if (c < 0xE0) { /* Two-byte sequence */
f_read(fp, 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(fp, 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 = '?';
}
}
}
#elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */
f_read(fp, s, 2, &rc);
if (rc != 2) break;
c = s[1] + (s[0] << 8);
#elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */
f_read(fp, s, 2, &rc);
if (rc != 2) break;
c = s[0] + (s[1] << 8);
#else /* Read a character in ANSI/OEM */
f_read(fp, s, 1, &rc);
if (rc != 1) break;
c = s[0];
if (IsDBCS1(c)) {
f_read(fp, s, 1, &rc);
if (rc != 1) break;
c = (c << 8) + s[0];
}
c = ff_convert(c, 1); /* OEM -> Unicode */
if (!c) c = '?';
#endif
#else /* Read a character without conversion */
f_read(fp, s, 1, &rc);
if (rc != 1) break;
c = s[0];
#endif
if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */
*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 */
/*-----------------------------------------------------------------------*/
typedef struct {
FIL* fp;
int idx, nchr;
BYTE buf[64];
} putbuff;
static
void putc_bfd (
putbuff* pb,
TCHAR c
)
{
UINT bw;
int i;
if (_USE_STRFUNC == 2 && c == '\n') /* LF -> CRLF conversion */
putc_bfd(pb, '\r');
i = pb->idx; /* Buffer write index (-1:error) */
if (i < 0) return;
#if _USE_LFN && _LFN_UNICODE
#if _STRF_ENCODE == 3 /* Write a character in UTF-8 */
if (c < 0x80) { /* 7-bit */
pb->buf[i++] = (BYTE)c;
} else {
if (c < 0x800) { /* 11-bit */
pb->buf[i++] = (BYTE)(0xC0 | c >> 6);
} else { /* 16-bit */
pb->buf[i++] = (BYTE)(0xE0 | c >> 12);
pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F));
}
pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F));
}
#elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */
pb->buf[i++] = (BYTE)(c >> 8);
pb->buf[i++] = (BYTE)c;
#elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */
pb->buf[i++] = (BYTE)c;
pb->buf[i++] = (BYTE)(c >> 8);
#else /* Write a character in ANSI/OEM */
c = ff_convert(c, 0); /* Unicode -> OEM */
if (!c) c = '?';
if (c >= 0x100)
pb->buf[i++] = (BYTE)(c >> 8);
pb->buf[i++] = (BYTE)c;
#endif
#else /* Write a character without conversion */
pb->buf[i++] = (BYTE)c;
#endif
if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */
f_write(pb->fp, pb->buf, (UINT)i, &bw);
i = (bw == (UINT)i) ? 0 : -1;
}
pb->idx = i;
pb->nchr++;
}
int f_putc (
TCHAR c, /* A character to be output */
FIL* fp /* Pointer to the file object */
)
{
putbuff pb;
UINT nw;
pb.fp = fp; /* Initialize output buffer */
pb.nchr = pb.idx = 0;
putc_bfd(&pb, c); /* Put a character */
if ( pb.idx >= 0 /* Flush buffered characters to the file */
&& f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
&& (UINT)pb.idx == nw) return pb.nchr;
return EOF;
}
/*-----------------------------------------------------------------------*/
/* Put a string to the file */
/*-----------------------------------------------------------------------*/
int f_puts (
const TCHAR* str, /* Pointer to the string to be output */
FIL* fp /* Pointer to the file object */
)
{
putbuff pb;
UINT nw;
pb.fp = fp; /* Initialize output buffer */
pb.nchr = pb.idx = 0;
while (*str) /* Put the string */
putc_bfd(&pb, *str++);
if ( pb.idx >= 0 /* Flush buffered characters to the file */
&& f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
&& (UINT)pb.idx == nw) return pb.nchr;
return EOF;
}
/*-----------------------------------------------------------------------*/
/* Put a formatted string to the file */
/*-----------------------------------------------------------------------*/
int f_printf (
FIL* fp, /* Pointer to the file object */
const TCHAR* fmt, /* Pointer to the format string */
... /* Optional arguments... */
)
{
va_list arp;
BYTE f, r;
UINT nw, i, j, w;
DWORD v;
TCHAR c, d, s[16], *p;
putbuff pb;
pb.fp = fp; /* Initialize output buffer */
pb.nchr = pb.idx = 0;
va_start(arp, fmt);
for (;;) {
c = *fmt++;
if (c == 0) break; /* End of string */
if (c != '%') { /* Non escape character */
putc_bfd(&pb, c);
continue;
}
w = f = 0;
c = *fmt++;
if (c == '0') { /* Flag: '0' padding */
f = 1; c = *fmt++;
} else {
if (c == '-') { /* Flag: left justified */
f = 2; c = *fmt++;
}
}
while (IsDigit(c)) { /* Precision */
w = w * 10 + c - '0';
c = *fmt++;
}
if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
f |= 4; c = *fmt++;
}
if (!c) break;
d = c;
if (IsLower(d)) d -= 0x20;
switch (d) { /* Type is... */
case 'S' : /* String */
p = va_arg(arp, TCHAR*);
for (j = 0; p[j]; j++) ;
if (!(f & 2)) {
while (j++ < w) putc_bfd(&pb, ' ');
}
while (*p) putc_bfd(&pb, *p++);
while (j++ < w) putc_bfd(&pb, ' ');
continue;
case 'C' : /* Character */
putc_bfd(&pb, (TCHAR)va_arg(arp, int)); 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' : /* Hexdecimal */
r = 16; break;
default: /* Unknown type (pass-through) */
putc_bfd(&pb, c); continue;
}
/* Get an argument and put it in numeral */
v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
if (d == 'D' && (v & 0x80000000)) {
v = 0 - v;
f |= 8;
}
i = 0;
do {
d = (TCHAR)(v % r); v /= r;
if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
s[i++] = d + '0';
} while (v && i < sizeof s / sizeof s[0]);
if (f & 8) s[i++] = '-';
j = i; d = (f & 1) ? '0' : ' ';
while (!(f & 2) && j++ < w) putc_bfd(&pb, d);
do putc_bfd(&pb, s[--i]); while (i);
while (j++ < w) putc_bfd(&pb, d);
}
va_end(arp);
if ( pb.idx >= 0 /* Flush buffered characters to the file */
&& f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
&& (UINT)pb.idx == nw) return pb.nchr;
return EOF;
}
#endif /* !_FS_READONLY */
#endif /* _USE_STRFUNC */
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