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circuitpython/lib/oofatfs/ff.c

5594 lines
221 KiB

/* This file is part of ooFatFs, a customised version of FatFs
* See https://github.com/micropython/oofatfs for details
*/
/*----------------------------------------------------------------------------/
/ FatFs - Generic FAT file system module R0.12b /
/-----------------------------------------------------------------------------/
/
/ Copyright (C) 2016, ChaN, all right reserved.
/
/ FatFs module is an open source software. Redistribution and use of FatFs in
/ source and binary forms, with or without modification, are permitted provided
/ that the following condition is met:
/ 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>
#include "ff.h" /* Declarations of FatFs API */
#include "diskio.h" /* Declarations of device I/O functions */
// DIR has been renamed FF_DIR in the public API so it doesn't clash with POSIX
#define DIR FF_DIR
/*--------------------------------------------------------------------------
Module Private Definitions
---------------------------------------------------------------------------*/
#if _FATFS != 68020 /* Revision ID */
#error Wrong include file (ff.h).
#endif
#define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
/* 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
/* 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 */
#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 lock controls */
#if _FS_LOCK != 0
#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) */
DWORD ofs; /* Object ID 3, directory offset */
WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
} FILESEM;
#endif
/* DBCS code ranges and SBCS upper conversion tables */
#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. */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,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,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 == 720 /* Arabic */
#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 == 737 /* Greek */
#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,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 771 /* KBL */
#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,0xDC,0xDE,0xDE, \
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
#elif _CODE_PAGE == 775 /* Baltic */
#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 /* Latin 1 */
#define _DF1S 0
#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 852 /* Latin 2 */
#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,0xAC, \
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 */
#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 */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,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,0xAD,0xAE,0xAF, \
0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 860 /* Portuguese */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,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 == 861 /* Icelandic */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,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 == 862 /* Hebrew */
#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,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 == 863 /* Canadian-French */
#define _DF1S 0
#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,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 == 864 /* Arabic */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,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,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 == 865 /* Nordic */
#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,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 == 866 /* Russian */
#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, \
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 869 /* Greek 2 */
#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,0x86,0x9C,0x8D,0x8F,0x90, \
0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,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, \
0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
#elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
#if _USE_LFN != 0
#error Cannot enable LFN 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 != 0 /* 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 */
/* File attribute bits (internal use) */
#define AM_VOL 0x08 /* Volume label */
#define AM_LFN 0x0F /* LFN entry */
#define AM_MASK 0x3F /* Mask of defined bits */
/* File access control and file status flags (internal use) */
#define FA_SEEKEND 0x20 /* Seek to end of the file on file open */
#define FA_MODIFIED 0x40 /* File has been modified */
#define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */
/* 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 */
#define NS_NOLFN 0x40 /* Do not find LFN */
#define NS_NONAME 0x80 /* Not followed */
/* Limits and boundaries (differ from specs but correct for real DOS/Windows) */
#define MAX_FAT12 0xFF5 /* Maximum number of FAT12 clusters */
#define MAX_FAT16 0xFFF5 /* Maximum number of FAT16 clusters */
#define MAX_FAT32 0xFFFFFF5 /* Maximum number of FAT32 clusters */
#define MAX_EXFAT 0x7FFFFFFD /* Maximum number of exFAT clusters (limited by implementation) */
#define MAX_DIR 0x200000 /* Maximum size of FAT directory */
#define MAX_DIR_EX 0x10000000 /* Maximum size of exFAT directory */
/* FatFs refers the members in the FAT structures as byte array instead of
/ structure members because the structure is not binary compatible between
/ different platforms */
#define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */
#define BS_OEMName 3 /* OEM name (8-byte) */
#define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */
#define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */
#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */
#define BPB_NumFATs 16 /* Number of FATs (BYTE) */
#define BPB_RootEntCnt 17 /* Size of root directory area for FAT12/16 [entry] (WORD) */
#define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */
#define BPB_Media 21 /* Media descriptor byte (BYTE) */
#define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */
#define BPB_SecPerTrk 24 /* Track size for int13h [sector] (WORD) */
#define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */
#define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */
#define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */
#define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */
#define BS_NTres 37 /* Error flag (BYTE) */
#define BS_BootSig 38 /* Extended boot signature (BYTE) */
#define BS_VolID 39 /* Volume serial number (DWORD) */
#define BS_VolLab 43 /* Volume label string (8-byte) */
#define BS_FilSysType 54 /* File system type string (8-byte) */
#define BS_BootCode 62 /* Boot code (448-byte) */
#define BS_55AA 510 /* Signature word (WORD) */
#define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */
#define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */
#define BPB_FSVer32 42 /* FAT32: File system version (WORD) */
#define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */
#define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */
#define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */
#define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */
#define BS_NTres32 65 /* FAT32: Error flag (BYTE) */
#define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */
#define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */
#define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */
#define BS_FilSysType32 82 /* FAT32: File system type string (8-byte) */
#define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */
#define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */
#define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */
#define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */
#define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */
#define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */
#define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */
#define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */
#define BPB_RootClusEx 96 /* exFAT: Root directory cluster (DWORD) */
#define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */
#define BPB_FSVerEx 104 /* exFAT: File system version (WORD) */
#define BPB_VolFlagEx 106 /* exFAT: Volume flags (BYTE) */
#define BPB_ActFatEx 107 /* exFAT: Active FAT flags (BYTE) */
#define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in byte (BYTE) */
#define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in sector (BYTE) */
#define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */
#define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */
#define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */
#define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */
#define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */
#define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */
#define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */
#define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */
#define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */
#define MBR_Table 446 /* MBR: Offset of partition table in the MBR */
#define SZ_PTE 16 /* MBR: Size of a partition table entry */
#define PTE_Boot 0 /* MBR PTE: Boot indicator */
#define PTE_StHead 1 /* MBR PTE: Start head */
#define PTE_StSec 2 /* MBR PTE: Start sector */
#define PTE_StCyl 3 /* MBR PTE: Start cylinder */
#define PTE_System 4 /* MBR PTE: System ID */
#define PTE_EdHead 5 /* MBR PTE: End head */
#define PTE_EdSec 6 /* MBR PTE: End sector */
#define PTE_EdCyl 7 /* MBR PTE: End cylinder */
#define PTE_StLba 8 /* MBR PTE: Start in LBA */
#define PTE_SizLba 12 /* MBR PTE: Size in LBA */
#define DIR_Name 0 /* Short file name (11-byte) */
#define DIR_Attr 11 /* Attribute (BYTE) */
#define DIR_NTres 12 /* Lower case flag (BYTE) */
#define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */
#define DIR_CrtTime 14 /* Created time (DWORD) */
#define DIR_LstAccDate 18 /* Last accessed date (WORD) */
#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */
#define DIR_ModTime 22 /* Modified time (DWORD) */
#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */
#define DIR_FileSize 28 /* File size (DWORD) */
#define LDIR_Ord 0 /* LFN entry order and LLE flag (BYTE) */
#define LDIR_Attr 11 /* LFN attribute (BYTE) */
#define LDIR_Type 12 /* LFN type (BYTE) */
#define LDIR_Chksum 13 /* Checksum of the SFN entry (BYTE) */
#define LDIR_FstClusLO 26 /* Must be zero (WORD) */
#define XDIR_Type 0 /* Type of exFAT directory entry (BYTE) */
#define XDIR_NumLabel 1 /* Number of volume label characters (BYTE) */
#define XDIR_Label 2 /* Volume label (11-WORD) */
#define XDIR_CaseSum 4 /* Sum of case conversion table (DWORD) */
#define XDIR_NumSec 1 /* Number of secondary entries (BYTE) */
#define XDIR_SetSum 2 /* Sum of the set of directory entries (WORD) */
#define XDIR_Attr 4 /* File attribute (WORD) */
#define XDIR_CrtTime 8 /* Created time (DWORD) */
#define XDIR_ModTime 12 /* Modified time (DWORD) */
#define XDIR_AccTime 16 /* Last accessed time (DWORD) */
#define XDIR_CrtTime10 20 /* Created time subsecond (BYTE) */
#define XDIR_ModTime10 21 /* Modified time subsecond (BYTE) */
#define XDIR_CrtTZ 22 /* Created timezone (BYTE) */
#define XDIR_ModTZ 23 /* Modified timezone (BYTE) */
#define XDIR_AccTZ 24 /* Last accessed timezone (BYTE) */
#define XDIR_GenFlags 33 /* Gneral secondary flags (WORD) */
#define XDIR_NumName 35 /* Number of file name characters (BYTE) */
#define XDIR_NameHash 36 /* Hash of file name (WORD) */
#define XDIR_ValidFileSize 40 /* Valid file size (QWORD) */
#define XDIR_FstClus 52 /* First cluster of the file data (DWORD) */
#define XDIR_FileSize 56 /* File/Directory size (QWORD) */
#define SZDIRE 32 /* Size of a directory entry */
#define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
#define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */
#define RDDEM 0x05 /* Replacement of the character collides with DDEM */
/*--------------------------------------------------------------------------
Module Private Work Area
---------------------------------------------------------------------------*/
/* Remark: Variables here without initial value shall be guaranteed zero/null
/ at start-up. If not, either the linker or start-up routine being used is
/ not compliance with C standard. */
#if _VOLUMES < 1 || _VOLUMES > 9
#error Wrong _VOLUMES setting
#endif
static WORD Fsid; /* File system mount ID */
#if _FS_LOCK != 0
static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */
#endif
#if _USE_LFN == 0 /* Non-LFN configuration */
#define DEF_NAMBUF
#define INIT_NAMBUF(fs)
#define FREE_NAMBUF()
#else
#if _MAX_LFN < 12 || _MAX_LFN > 255
#error Wrong _MAX_LFN setting
#endif
#if _USE_LFN == 1 /* LFN enabled with static working buffer */
#if _FS_EXFAT
static BYTE DirBuf[SZDIRE*19]; /* Directory entry block scratchpad buffer (19 entries in size) */
#endif
static WCHAR LfnBuf[_MAX_LFN+1]; /* LFN enabled with static working buffer */
#define DEF_NAMBUF
#define INIT_NAMBUF(fs)
#define FREE_NAMBUF()
#elif _USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */
#if _FS_EXFAT
#define DEF_NAMBUF WCHAR lbuf[_MAX_LFN+1]; BYTE dbuf[SZDIRE*19];
#define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }
#define FREE_NAMBUF()
#else
#define DEF_NAMBUF WCHAR lbuf[_MAX_LFN+1];
#define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; }
#define FREE_NAMBUF()
#endif
#elif _USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */
#if _FS_EXFAT
#define DEF_NAMBUF WCHAR *lfn;
#define INIT_NAMBUF(fs) { lfn = ff_memalloc((_MAX_LFN+1)*2 + SZDIRE*19); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+_MAX_LFN+1); }
#define FREE_NAMBUF() ff_memfree(lfn)
#else
#define DEF_NAMBUF WCHAR *lfn;
#define INIT_NAMBUF(fs) { lfn = ff_memalloc((_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }
#define FREE_NAMBUF() ff_memfree(lfn)
#endif
#else
#error Wrong _USE_LFN setting
#endif
#endif
#ifdef _EXCVT
static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */
#endif
/*--------------------------------------------------------------------------
Module Private Functions
---------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* Load/Store multi-byte word in the FAT structure */
/*-----------------------------------------------------------------------*/
static
WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */
{
WORD rv;
rv = ptr[1];
rv = rv << 8 | ptr[0];
return rv;
}
static
DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */
{
DWORD rv;
rv = ptr[3];
rv = rv << 8 | ptr[2];
rv = rv << 8 | ptr[1];
rv = rv << 8 | ptr[0];
return rv;
}
#if _FS_EXFAT
static
QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */
{
QWORD rv;
rv = ptr[7];
rv = rv << 8 | ptr[6];
rv = rv << 8 | ptr[5];
rv = rv << 8 | ptr[4];
rv = rv << 8 | ptr[3];
rv = rv << 8 | ptr[2];
rv = rv << 8 | ptr[1];
rv = rv << 8 | ptr[0];
return rv;
}
#endif
#if !_FS_READONLY
static
void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */
{
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val;
}
static
void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */
{
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val;
}
#if _FS_EXFAT
static
void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */
{
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val; val >>= 8;
*ptr++ = (BYTE)val;
}
#endif
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* String functions */
/*-----------------------------------------------------------------------*/
// These were originally provided by the FatFs library but we use externally
// provided versions from C stdlib to (hopefully) reduce code size and use
// more efficient versions.
#define mem_cpy memcpy
#define mem_set memset
#define mem_cmp memcmp
/* Check if chr is contained in the string */
static
int chk_chr (const char* str, int chr) { /* NZ:contained, ZR:not contained */
while (*str && *str != chr) str++;
return *str;
}
#if _FS_REENTRANT
/*-----------------------------------------------------------------------*/
/* Request/Release grant to access the volume */
/*-----------------------------------------------------------------------*/
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_TIMEOUT) {
ff_rel_grant(fs->sobj);
}
}
#endif
#if _FS_LOCK != 0
/*-----------------------------------------------------------------------*/
/* File lock control functions */
/*-----------------------------------------------------------------------*/
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->obj.fs && /* Check if the object matched with an open object */
Files[i].clu == dp->obj.sclust &&
Files[i].ofs == dp->dptr) 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->obj.fs &&
Files[i].clu == dp->obj.sclust &&
Files[i].ofs == dp->dptr) 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->obj.fs;
Files[i].clu = dp->obj.sclust;
Files[i].ofs = dp->dptr;
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 > 0) n--; /* Decrement read mode open count */
Files[i].ctr = n;
if (n == 0) 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 /* _FS_LOCK != 0 */
/*-----------------------------------------------------------------------*/
/* Move/Flush disk access window in the file system object */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERROR */
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 ( /* Returns FR_OK or FR_DISK_ERROR */
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;
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Synchronize file system and strage device */
/*-----------------------------------------------------------------------*/
static
FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */
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_clst);
st_dword(fs->win + FSI_Nxt_Free, fs->last_clst);
/* 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# */
/*-----------------------------------------------------------------------*/
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 */
/*-----------------------------------------------------------------------*/
static
DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */
_FDID* obj, /* Corresponding object */
DWORD clst /* Cluster number to get the value */
)
{
UINT wc, bc;
DWORD val;
FATFS *fs = obj->fs;
if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid 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;
val = ld_word(fs->win + clst * 2 % SS(fs));
break;
case FS_FAT32 :
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF;
break;
#if _FS_EXFAT
case FS_EXFAT :
if (obj->objsize) {
DWORD cofs = clst - obj->sclust; /* Offset from start cluster */
DWORD clen = (DWORD)((obj->objsize - 1) / SS(fs)) / fs->csize; /* Number of clusters - 1 */
if (obj->stat == 2) { /* Is there no valid chain on the FAT? */
if (cofs <= clen) {
val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* Generate the value */
break;
}
}
if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the contiguous part? */
val = clst + 1; /* Generate the value */
break;
}
if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF;
break;
}
}
/* go next */
#endif
default:
val = 1; /* Internal error */
}
}
return val;
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* FAT access - Change value of a FAT entry */
/*-----------------------------------------------------------------------*/
static
FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
FATFS* fs, /* Corresponding 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 = FR_INT_ERR;
if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */
switch (fs->fs_type) {
case FS_FAT12 : /* Bitfield items */
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 : /* WORD aligned items */
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
if (res != FR_OK) break;
st_word(fs->win + clst * 2 % SS(fs), (WORD)val);
fs->wflag = 1;
break;
case FS_FAT32 : /* DWORD aligned items */
#if _FS_EXFAT
case FS_EXFAT :
#endif
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
if (res != FR_OK) break;
if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {
val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000);
}
st_dword(fs->win + clst * 4 % SS(fs), val);
fs->wflag = 1;
break;
}
}
return res;
}
#endif /* !_FS_READONLY */
#if _FS_EXFAT && !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* exFAT: Accessing FAT and Allocation Bitmap */
/*-----------------------------------------------------------------------*/
/*---------------------------------------------*/
/* exFAT: Find a contiguous free cluster block */
/*---------------------------------------------*/
static
DWORD find_bitmap ( /* 0:No free cluster, 2..:Free cluster found, 0xFFFFFFFF:Disk error */
FATFS* fs, /* File system object */
DWORD clst, /* Cluster number to scan from */
DWORD ncl /* Number of contiguous clusters to find (1..) */
)
{
BYTE bm, bv;
UINT i;
DWORD val, scl, ctr;
clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */
if (clst >= fs->n_fatent - 2) clst = 0;
scl = val = clst; ctr = 0;
for (;;) {
if (move_window(fs, fs->database + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF; /* (assuming bitmap is located top of the cluster heap) */
i = val / 8 % SS(fs); bm = 1 << (val % 8);
do {
do {
bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */
if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */
val = 0; bm = 0; i = 4096;
}
if (!bv) { /* Is it a free cluster? */
if (++ctr == ncl) return scl + 2; /* Check run length */
} else {
scl = val; ctr = 0; /* Encountered a live cluster, restart to scan */
}
if (val == clst) return 0; /* All cluster scanned? */
} while (bm);
bm = 1;
} while (++i < SS(fs));
}
}
/*------------------------------------*/
/* exFAT: Set/Clear a block of bitmap */
/*------------------------------------*/
static
FRESULT change_bitmap (
FATFS* fs, /* File system object */
DWORD clst, /* Cluster number to change from */
DWORD ncl, /* Number of clusters to be changed */
int bv /* bit value to be set (0 or 1) */
)
{
BYTE bm;
UINT i;
DWORD sect;
clst -= 2; /* The first bit corresponds to cluster #2 */
sect = fs->database + clst / 8 / SS(fs); /* Sector address (assuming bitmap is located top of the cluster heap) */
i = clst / 8 % SS(fs); /* Byte offset in the sector */
bm = 1 << (clst % 8); /* Bit mask in the byte */
for (;;) {
if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR;
do {
do {
if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */
fs->win[i] ^= bm; /* Flip the bit */
fs->wflag = 1;
if (--ncl == 0) return FR_OK; /* All bits processed? */
} while (bm <<= 1); /* Next bit */
bm = 1;
} while (++i < SS(fs)); /* Next byte */
i = 0;
}
}
/*---------------------------------------------*/
/* Complement contiguous part of the FAT chain */
/*---------------------------------------------*/
static
FRESULT fill_fat_chain (
_FDID* obj /* Pointer to the corresponding object */
)
{
FRESULT res;
DWORD cl, n;
if (obj->stat == 3) { /* Has the object been changed 'fragmented'? */
for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */
res = put_fat(obj->fs, cl, cl + 1);
if (res != FR_OK) return res;
}
obj->stat = 0; /* Change status 'FAT chain is valid' */
}
return FR_OK;
}
#endif /* _FS_EXFAT && !_FS_READONLY */
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* FAT handling - Remove a cluster chain */
/*-----------------------------------------------------------------------*/
static
FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
_FDID* obj, /* Corresponding object */
DWORD clst, /* Cluster to remove a chain from */
DWORD pclst /* Previous cluster of clst (0:an entire chain) */
)
{
FRESULT res = FR_OK;
DWORD nxt;
FATFS *fs = obj->fs;
#if _FS_EXFAT || _USE_TRIM
DWORD scl = clst, ecl = clst;
#endif
#if _USE_TRIM
DWORD rt[2];
#endif
if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */
/* Mark the previous cluster 'EOC' on the FAT if it exists */
if (pclst && (!_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) {
res = put_fat(fs, pclst, 0xFFFFFFFF);
if (res != FR_OK) return res;
}
/* Remove the chain */
do {
nxt = get_fat(obj, clst); /* Get cluster status */
if (nxt == 0) break; /* Empty cluster? */
if (nxt == 1) return FR_INT_ERR; /* Internal error? */
if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */
if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {
res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */
if (res != FR_OK) return res;
}
if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */
fs->free_clst++;
fs->fsi_flag |= 1;
}
#if _FS_EXFAT || _USE_TRIM
if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
ecl = nxt;
} else { /* End of contiguous cluster block */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */
if (res != FR_OK) return res;
}
#endif
#if _USE_TRIM
rt[0] = clust2sect(fs, scl); /* Start sector */
rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Inform device the block can be erased */
#endif
scl = ecl = nxt;
}
#endif
clst = nxt; /* Next cluster */
} while (clst < fs->n_fatent); /* Repeat while not the last link */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
if (pclst == 0) { /* Does object have no chain? */
obj->stat = 0; /* Change the object status 'initial' */
} else {
if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Did the chain got contiguous? */
obj->stat = 2; /* Change the object status 'contiguous' */
}
}
}
#endif
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* FAT handling - Stretch a chain or Create a new chain */
/*-----------------------------------------------------------------------*/
static
DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
_FDID* obj, /* Corresponding object */
DWORD clst /* Cluster# to stretch, 0:Create a new chain */
)
{
DWORD cs, ncl, scl;
FRESULT res;
FATFS *fs = obj->fs;
if (clst == 0) { /* Create a new chain */
scl = fs->last_clst; /* Get suggested cluster to start from */
if (scl == 0 || scl >= fs->n_fatent) scl = 1;
}
else { /* Stretch current chain */
cs = get_fat(obj, 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;
}
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */
if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */
res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */
if (res == FR_INT_ERR) return 1;
if (res == FR_DISK_ERR) return 0xFFFFFFFF;
if (clst == 0) { /* Is it a new chain? */
obj->stat = 2; /* Set status 'contiguous chain' */
} else { /* This is a stretched chain */
if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */
obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */
obj->stat = 3; /* Change status 'just fragmented' */
}
}
} else
#endif
{ /* On the FAT12/16/32 volume */
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(obj, ncl); /* Get the cluster status */
if (cs == 0) break; /* Found a free cluster */
if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* An error occurred */
if (ncl == scl) return 0; /* No free cluster */
}
}
if (_FS_EXFAT && fs->fs_type == FS_EXFAT && obj->stat == 2) { /* Is it a contiguous chain? */
res = FR_OK; /* FAT does not need to be written */
} else {
res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */
if (res == FR_OK && clst) {
res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */
}
}
if (res == FR_OK) { /* Update FSINFO if function succeeded. */
fs->last_clst = ncl;
if (fs->free_clst < fs->n_fatent - 2) fs->free_clst--;
fs->fsi_flag |= 1;
} else {
ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Create error status */
}
return ncl; /* Return new cluster number or error status */
}
#endif /* !_FS_READONLY */
#if _USE_FASTSEEK
/*-----------------------------------------------------------------------*/
/* FAT handling - Convert offset into cluster with link map table */
/*-----------------------------------------------------------------------*/
static
DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
FIL* fp, /* Pointer to the file object */
FSIZE_t ofs /* File offset to be converted to cluster# */
)
{
DWORD cl, ncl, *tbl;
FATFS *fs = fp->obj.fs;
tbl = fp->cltbl + 1; /* Top of CLMT */
cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */
for (;;) {
ncl = *tbl++; /* Number of cluters in the fragment */
if (ncl == 0) 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 ( /* FR_OK(0):succeeded, !=0:error */
DIR* dp, /* Pointer to directory object */
DWORD ofs /* Offset of directory table */
)
{
DWORD csz, clst;
FATFS *fs = dp->obj.fs;
if (ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */
return FR_INT_ERR;
}
dp->dptr = ofs; /* Set current offset */
clst = dp->obj.sclust; /* Table start cluster (0:root) */
if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */
clst = fs->dirbase;
if (_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */
}
if (clst == 0) { /* Static table (root-directory in FAT12/16) */
if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */
dp->sect = fs->dirbase;
} else { /* Dynamic table (sub-directory or root-directory in FAT32+) */
csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */
while (ofs >= csz) { /* Follow cluster chain */
clst = get_fat(&dp->obj, clst); /* Get next cluster */
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */
ofs -= csz;
}
dp->sect = clust2sect(fs, clst);
}
dp->clust = clst; /* Current cluster# */
if (!dp->sect) return FR_INT_ERR;
dp->sect += ofs / SS(fs); /* Sector# of the directory entry */
dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Directory handling - Move directory table index next */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_next ( /* FR_OK(0):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 ofs, clst;
FATFS *fs = dp->obj.fs;
#if !_FS_READONLY
UINT n;
#endif
ofs = dp->dptr + SZDIRE; /* Next entry */
if (!dp->sect || ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) return FR_NO_FILE; /* Report EOT when offset has reached max value */
if (ofs % SS(fs) == 0) { /* Sector changed? */
dp->sect++; /* Next sector */
if (!dp->clust) { /* Static table */
if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */
dp->sect = 0; return FR_NO_FILE;
}
}
else { /* Dynamic table */
if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */
clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */
if (clst <= 1) return FR_INT_ERR; /* Internal error */
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
if (clst >= fs->n_fatent) { /* Reached end of dynamic table */
#if !_FS_READONLY
if (!stretch) { /* If no stretch, report EOT */
dp->sect = 0; return FR_NO_FILE;
}
clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */
if (clst == 0) return FR_DENIED; /* No free cluster */
if (clst == 1) return FR_INT_ERR; /* Internal error */
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
/* Clean-up the stretched table */
if (_FS_EXFAT) dp->obj.stat |= 4; /* The directory needs to be updated */
if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */
mem_set(fs->win, 0, SS(fs)); /* Clear window buffer */
for (n = 0, fs->winsect = clust2sect(fs, clst); n < fs->csize; n++, fs->winsect++) { /* Fill the new cluster with 0 */
fs->wflag = 1;
if (sync_window(fs) != FR_OK) return FR_DISK_ERR;
}
fs->winsect -= n; /* Restore window offset */
#else
if (!stretch) dp->sect = 0; /* If no stretch, report EOT (this is to suppress warning) */
dp->sect = 0; return FR_NO_FILE; /* Report EOT */
#endif
}
dp->clust = clst; /* Initialize data for new cluster */
dp->sect = clust2sect(fs, clst);
}
}
}
dp->dptr = ofs; /* Current entry */
dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */
return FR_OK;
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Directory handling - Reserve a block of directory entries */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
DIR* dp, /* Pointer to the directory object */
UINT nent /* Number of contiguous entries to allocate */
)
{
FRESULT res;
UINT n;
FATFS *fs = dp->obj.fs;
res = dir_sdi(dp, 0);
if (res == FR_OK) {
n = 0;
do {
res = move_window(fs, dp->sect);
if (res != FR_OK) break;
#if _FS_EXFAT
if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) {
#else
if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) {
#endif
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);
} while (res == FR_OK); /* Next entry with table stretch enabled */
}
if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* FAT: Directory handling - Load/Store start cluster number */
/*-----------------------------------------------------------------------*/
static
DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
FATFS* fs, /* Pointer to the fs object */
const BYTE* dir /* Pointer to the key 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 (
FATFS* fs, /* Pointer to the fs object */
BYTE* dir, /* Pointer to the key entry */
DWORD cl /* Value to be set */
)
{
st_word(dir + DIR_FstClusLO, (WORD)cl);
if (fs->fs_type == FS_FAT32) {
st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16));
}
}
#endif
#if _USE_LFN != 0
/*------------------------------------------------------------------------*/
/* FAT-LFN: LFN handling */
/*------------------------------------------------------------------------*/
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 */
/*--------------------------------------------------------*/
/* FAT-LFN: Compare a part of file name with an LFN entry */
/*--------------------------------------------------------*/
static
int cmp_lfn ( /* 1:matched, 0:not matched */
const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
BYTE* dir /* Pointer to the directory entry containing the part of LFN */
)
{
UINT i, s;
WCHAR wc, uc;
if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
if (wc) {
if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */
return 0; /* Not matched */
}
wc = uc;
} else {
if (uc != 0xFFFF) return 0; /* Check filler */
}
}
if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */
return 1; /* The part of LFN matched */
}
#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT
/*-----------------------------------------------------*/
/* FAT-LFN: Pick a part of file name from an LFN entry */
/*-----------------------------------------------------*/
static
int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
BYTE* dir /* Pointer to the LFN entry */
)
{
UINT i, s;
WCHAR wc, uc;
if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
if (wc) {
if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
lfnbuf[i++] = wc = uc; /* Store it */
} else {
if (uc != 0xFFFF) return 0; /* Check filler */
}
}
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; /* The part of LFN is valid */
}
#endif
#if !_FS_READONLY
/*-----------------------------------------*/
/* FAT-LFN: Create an entry of LFN entries */
/*-----------------------------------------*/
static
void put_lfn (
const WCHAR* lfn, /* Pointer to the LFN */
BYTE* dir, /* Pointer to the LFN entry to be created */
BYTE ord, /* LFN order (1-20) */
BYTE sum /* Checksum of the corresponding SFN */
)
{
UINT i, s;
WCHAR wc;
dir[LDIR_Chksum] = sum; /* Set checksum */
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 working buffer */
s = wc = 0;
do {
if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */
st_word(dir + LfnOfs[s], wc); /* Put it */
if (wc == 0) wc = 0xFFFF; /* Padding characters for left locations */
} while (++s < 13);
if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */
dir[LDIR_Ord] = ord; /* Set the LFN order */
}
#endif /* !_FS_READONLY */
#endif /* _USE_LFN != 0 */
#if _USE_LFN != 0 && !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* FAT-LFN: Create a Numbered SFN */
/*-----------------------------------------------------------------------*/
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) { /* In case of 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 = (BYTE)((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 /* _USE_LFN != 0 && !_FS_READONLY */
#if _USE_LFN != 0
/*-----------------------------------------------------------------------*/
/* FAT-LFN: Calculate checksum of an SFN entry */
/*-----------------------------------------------------------------------*/
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 /* _USE_LFN != 0 */
#if _FS_EXFAT
/*-----------------------------------------------------------------------*/
/* exFAT: Checksum */
/*-----------------------------------------------------------------------*/
static
WORD xdir_sum ( /* Get checksum of the directoly block */
const BYTE* dir /* Directory entry block to be calculated */
)
{
UINT i, szblk;
WORD sum;
szblk = (dir[XDIR_NumSec] + 1) * SZDIRE;
for (i = sum = 0; i < szblk; i++) {
if (i == XDIR_SetSum) { /* Skip sum field */
i++;
} else {
sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i];
}
}
return sum;
}
static
WORD xname_sum ( /* Get check sum (to be used as hash) of the name */
const WCHAR* name /* File name to be calculated */
)
{
WCHAR chr;
WORD sum = 0;
while ((chr = *name++) != 0) {
chr = ff_wtoupper(chr); /* File name needs to be ignored case */
sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF);
sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8);
}
return sum;
}
#if !_FS_READONLY && _USE_MKFS
static
DWORD xsum32 (
BYTE dat, /* Data to be sumed */
DWORD sum /* Previous value */
)
{
sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat;
return sum;
}
#endif
#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
/*------------------------------------------------------*/
/* exFAT: Get object information from a directory block */
/*------------------------------------------------------*/
static
void get_xdir_info (
BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */
FILINFO* fno /* Buffer to store the extracted file information */
)
{
UINT di, si;
WCHAR w;
#if !_LFN_UNICODE
UINT nc;
#endif
/* Get file name */
#if _LFN_UNICODE
if (dirb[XDIR_NumName] <= _MAX_LFN) {
for (si = SZDIRE * 2, di = 0; di < dirb[XDIR_NumName]; si += 2, di++) {
if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */
w = ld_word(dirb + si); /* Get a character */
fno->fname[di] = w; /* Store it */
}
} else {
di = 0; /* Buffer overflow and inaccessible object */
}
#else
for (si = SZDIRE * 2, di = nc = 0; nc < dirb[XDIR_NumName]; si += 2, nc++) {
if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */
w = ld_word(dirb + si); /* Get a character */
w = ff_convert(w, 0); /* Unicode -> OEM */
if (w == 0) { di = 0; break; } /* Could not be converted and inaccessible object */
if (_DF1S && w >= 0x100) { /* Put 1st byte if it is a DBC (always false at SBCS cfg) */
fno->fname[di++] = (char)(w >> 8);
}
if (di >= _MAX_LFN) { di = 0; break; } /* Buffer overflow and inaccessible object */
fno->fname[di++] = (char)w;
}
#endif
if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object? */
fno->fname[di] = 0; /* Terminate file name */
fno->altname[0] = 0; /* No SFN */
fno->fattrib = dirb[XDIR_Attr]; /* Attribute */
fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */
fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */
fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */
}
#endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */
/*-----------------------------------*/
/* exFAT: Get a directry entry block */
/*-----------------------------------*/
static
FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */
DIR* dp /* Pointer to the reading direcotry object pointing the 85 entry */
)
{
FRESULT res;
UINT i, nent;
BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */
/* Load 85 entry */
res = move_window(dp->obj.fs, dp->sect);
if (res != FR_OK) return res;
if (dp->dir[XDIR_Type] != 0x85) return FR_INT_ERR;
mem_cpy(dirb, dp->dir, SZDIRE);
nent = dirb[XDIR_NumSec] + 1;
/* Load C0 entry */
res = dir_next(dp, 0);
if (res != FR_OK) return res;
res = move_window(dp->obj.fs, dp->sect);
if (res != FR_OK) return res;
if (dp->dir[XDIR_Type] != 0xC0) return FR_INT_ERR;
mem_cpy(dirb + SZDIRE, dp->dir, SZDIRE);
/* Load C1 entries */
if (nent < 3 || nent > 19) return FR_NO_FILE;
i = SZDIRE * 2; nent *= SZDIRE;
do {
res = dir_next(dp, 0);
if (res != FR_OK) return res;
res = move_window(dp->obj.fs, dp->sect);
if (res != FR_OK) return res;
if (dp->dir[XDIR_Type] != 0xC1) return FR_INT_ERR;
mem_cpy(dirb + i, dp->dir, SZDIRE);
i += SZDIRE;
} while (i < nent);
/* Sanity check */
if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR;
return FR_OK;
}
#if !_FS_READONLY || _FS_RPATH != 0
/*------------------------------------------------*/
/* exFAT: Load the object's directory entry block */
/*------------------------------------------------*/
static
FRESULT load_obj_dir (
DIR* dp, /* Blank directory object to be used to access containing direcotry */
const _FDID* obj /* Object with containing directory information */
)
{
FRESULT res;
/* Open object containing directory */
dp->obj.fs = obj->fs;
dp->obj.sclust = obj->c_scl;
dp->obj.stat = (BYTE)obj->c_size;
dp->obj.objsize = obj->c_size & 0xFFFFFF00;
dp->blk_ofs = obj->c_ofs;
res = dir_sdi(dp, dp->blk_ofs); /* Goto the block location */
if (res == FR_OK) {
res = load_xdir(dp); /* Load the object's entry block */
}
return res;
}
#endif
#if !_FS_READONLY
/*-----------------------------------------------*/
/* exFAT: Store the directory block to the media */
/*-----------------------------------------------*/
static
FRESULT store_xdir (
DIR* dp /* Pointer to the direcotry object */
)
{
FRESULT res;
UINT nent;
BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */
/* Create set sum */
st_word(dirb + XDIR_SetSum, xdir_sum(dirb));
nent = dirb[XDIR_NumSec] + 1;
/* Store the set of directory to the volume */
res = dir_sdi(dp, dp->blk_ofs);
while (res == FR_OK) {
res = move_window(dp->obj.fs, dp->sect);
if (res != FR_OK) break;
mem_cpy(dp->dir, dirb, SZDIRE);
dp->obj.fs->wflag = 1;
if (--nent == 0) break;
dirb += SZDIRE;
res = dir_next(dp, 0);
}
return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR;
}
/*-------------------------------------------*/
/* exFAT: Create a new directory enrty block */
/*-------------------------------------------*/
static
void create_xdir (
BYTE* dirb, /* Pointer to the direcotry entry block buffer */
const WCHAR* lfn /* Pointer to the nul terminated file name */
)
{
UINT i;
BYTE nb, nc;
WCHAR chr;
mem_set(dirb, 0, 2 * SZDIRE); /* Initialize 85+C0 entry */
dirb[XDIR_Type] = 0x85;
dirb[XDIR_Type + SZDIRE] = 0xC0;
st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */
i = SZDIRE * 2; /* C1 offset */
nc = 0; nb = 1; chr = 1;
do {
dirb[i++] = 0xC1; dirb[i++] = 0; /* Entry type C1 */
do { /* Fill name field */
if (chr && (chr = lfn[nc]) != 0) nc++; /* Get a character if exist */
st_word(dirb + i, chr); i += 2; /* Store it */
} while (i % SZDIRE);
nb++;
} while (lfn[nc]); /* Fill next entry if any char follows */
dirb[XDIR_NumName] = nc; /* Set name length */
dirb[XDIR_NumSec] = nb; /* Set number of C0+C1s */
}
#endif /* !_FS_READONLY */
#endif /* _FS_EXFAT */
#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT
/*-----------------------------------------------------------------------*/
/* Read an object from the directory */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_read (
DIR* dp, /* Pointer to the directory object */
int vol /* Filtered by 0:file/directory or 1:volume label */
)
{
FRESULT res = FR_NO_FILE;
FATFS *fs = dp->obj.fs;
BYTE a, c;
#if _USE_LFN != 0
BYTE ord = 0xFF, sum = 0xFF;
#endif
while (dp->sect) {
res = move_window(fs, dp->sect);
if (res != FR_OK) break;
c = dp->dir[DIR_Name]; /* Test for the entry type */
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of the directory */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
if (_USE_LABEL && vol) {
if (c == 0x83) break; /* Volume label entry? */
} else {
if (c == 0x85) { /* Start of the file entry block? */
dp->blk_ofs = dp->dptr; /* Get location of the block */
res = load_xdir(dp); /* Load the entry block */
if (res == FR_OK) {
dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */
}
break;
}
}
} else
#endif
{ /* On the FAT12/16/32 volume */
dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */
#if _USE_LFN != 0 /* LFN configuration */
if (c == DDEM || 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 an LFN sequence? */
sum = dp->dir[LDIR_Chksum];
c &= (BYTE)~LLEF; ord = c;
dp->blk_ofs = dp->dptr;
}
/* Check LFN validity and capture it */
ord = (c == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
} else { /* An SFN entry is found */
if (ord || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */
dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */
}
break;
}
}
#else /* Non LFN configuration */
if (c != DDEM && 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; /* Terminate the read operation on error or EOT */
return res;
}
#endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */
/*-----------------------------------------------------------------------*/
/* Directory handling - Find an object in the directory */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
DIR* dp /* Pointer to the directory object with the file name */
)
{
FRESULT res;
FATFS *fs = dp->obj.fs;
BYTE c;
#if _USE_LFN != 0
BYTE a, ord, sum;
#endif
res = dir_sdi(dp, 0); /* Rewind directory object */
if (res != FR_OK) return res;
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
BYTE nc;
UINT di, ni;
WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */
while ((res = dir_read(dp, 0)) == FR_OK) { /* Read an item */
if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip the comparison if hash value mismatched */
for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */
if ((di % SZDIRE) == 0) di += 2;
if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break;
}
if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */
}
return res;
}
#endif
/* On the FAT12/16/32 volume */
#if _USE_LFN != 0
ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
#endif
do {
res = move_window(fs, dp->sect);
if (res != FR_OK) break;
c = dp->dir[DIR_Name];
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
#if _USE_LFN != 0 /* LFN configuration */
dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;
if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
} else {
if (a == AM_LFN) { /* An LFN entry is found */
if (!(dp->fn[NSFLAG] & NS_NOLFN)) {
if (c & LLEF) { /* Is it start of LFN sequence? */
sum = dp->dir[LDIR_Chksum];
c &= (BYTE)~LLEF; ord = c; /* LFN start order */
dp->blk_ofs = dp->dptr; /* Start offset of LFN */
}
/* Check validity of the LFN entry and compare it with given name */
ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
}
} else { /* An SFN entry is found */
if (!ord && sum == sum_sfn(dp->dir)) break; /* LFN matched? */
if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */
ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
}
}
#else /* Non LFN configuration */
dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK;
if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */
#endif
res = dir_next(dp, 0); /* Next entry */
} while (res == FR_OK);
return res;
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Register an object to the directory */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_register ( /* FR_OK:succeeded, 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;
FATFS *fs = dp->obj.fs;
#if _USE_LFN != 0 /* LFN configuration */
UINT n, nlen, nent;
BYTE sn[12], sum;
if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */
for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
DIR dj;
nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */
res = dir_alloc(dp, nent); /* Allocate entries */
if (res != FR_OK) return res;
dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set block position */
if (dp->obj.sclust != 0 && (dp->obj.stat & 4)) { /* Has the sub-directory been stretched? */
dp->obj.stat &= 3;
dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase object size by cluster size */
res = fill_fat_chain(&dp->obj); /* Complement FAT chain if needed */
if (res != FR_OK) return res;
res = load_obj_dir(&dj, &dp->obj);
if (res != FR_OK) return res; /* Load the object status */
st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize); /* Update the allocation status */
st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize);
fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1;
res = store_xdir(&dj); /* Store the object status */
if (res != FR_OK) return res;
}
create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */
return FR_OK;
}
#endif
/* On the FAT12/16/32 volume */
mem_cpy(sn, dp->fn, 12);
if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */
for (n = 1; n < 100; n++) {
gen_numname(dp->fn, sn, fs->lfnbuf, 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' */
dp->fn[NSFLAG] = sn[NSFLAG];
}
/* Create an SFN with/without LFNs. */
nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */
res = dir_alloc(dp, nent); /* Allocate entries */
if (res == FR_OK && --nent) { /* Set LFN entry if needed */
res = dir_sdi(dp, dp->dptr - nent * SZDIRE);
if (res == FR_OK) {
sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
do { /* Store LFN entries in bottom first */
res = move_window(fs, dp->sect);
if (res != FR_OK) break;
put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum);
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
/* Set SFN entry */
if (res == FR_OK) {
res = move_window(fs, dp->sect);
if (res == FR_OK) {
mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */
mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */
#if _USE_LFN != 0
dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
#endif
fs->wflag = 1;
}
}
return res;
}
#endif /* !_FS_READONLY */
#if !_FS_READONLY && _FS_MINIMIZE == 0
/*-----------------------------------------------------------------------*/
/* Remove an object from the directory */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
DIR* dp /* Directory object pointing the entry to be removed */
)
{
FRESULT res;
FATFS *fs = dp->obj.fs;
#if _USE_LFN != 0 /* LFN configuration */
DWORD last = dp->dptr;
res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */
if (res == FR_OK) {
do {
res = move_window(fs, dp->sect);
if (res != FR_OK) break;
/* Mark an entry 'deleted' */
if (_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
dp->dir[XDIR_Type] &= 0x7F;
} else { /* On the FAT12/16/32 volume */
dp->dir[DIR_Name] = DDEM;
}
fs->wflag = 1;
if (dp->dptr >= last) break; /* If reached last entry then 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 = move_window(fs, dp->sect);
if (res == FR_OK) {
dp->dir[DIR_Name] = DDEM;
fs->wflag = 1;
}
#endif
return res;
}
#endif /* !_FS_READONLY && _FS_MINIMIZE == 0 */
#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
/*-----------------------------------------------------------------------*/
/* Get file information from directory entry */
/*-----------------------------------------------------------------------*/
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, j;
TCHAR c;
DWORD tm;
#if _USE_LFN != 0
WCHAR w, lfv;
FATFS *fs = dp->obj.fs;
#endif
fno->fname[0] = 0; /* Invaidate file info */
if (!dp->sect) return; /* Exit if read pointer has reached end of directory */
#if _USE_LFN != 0 /* LFN configuration */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
get_xdir_info(fs->dirbuf, fno);
return;
} else
#endif
{ /* On the FAT12/16/32 volume */
if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */
i = j = 0;
while ((w = fs->lfnbuf[j++]) != 0) { /* Get an LFN character */
#if !_LFN_UNICODE
w = ff_convert(w, 0); /* Unicode -> OEM */
if (w == 0) { 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 at SBCS cfg) */
fno->fname[i++] = (char)(w >> 8);
}
#endif
if (i >= _MAX_LFN) { i = 0; break; } /* No LFN if buffer overflow */
fno->fname[i++] = (TCHAR)w;
}
fno->fname[i] = 0; /* Terminate the LFN */
}
}
i = j = 0;
lfv = fno->fname[i]; /* LFN is exist if non-zero */
while (i < 11) { /* Copy name body and extension */
c = (TCHAR)dp->dir[i++];
if (c == ' ') continue; /* Skip padding spaces */
if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
if (i == 9) { /* Insert a . if extension is exist */
if (!lfv) fno->fname[j] = '.';
fno->altname[j++] = '.';
}
#if _LFN_UNICODE
if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dp->dir[i])) {
c = c << 8 | dp->dir[i++];
}
c = ff_convert(c, 1); /* OEM -> Unicode */
if (!c) c = '?';
#endif
fno->altname[j] = c;
if (!lfv) {
if (IsUpper(c) && (dp->dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY))) {
c += 0x20; /* To lower */
}
fno->fname[j] = c;
}
j++;
}
if (!lfv) {
fno->fname[j] = 0;
if (!dp->dir[DIR_NTres]) j = 0; /* Altname is no longer needed if neither LFN nor case info is exist. */
}
fno->altname[j] = 0; /* Terminate the SFN */
#else /* Non-LFN configuration */
i = j = 0;
while (i < 11) { /* Copy name body and extension */
c = (TCHAR)dp->dir[i++];
if (c == ' ') continue; /* Skip padding spaces */
if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
if (i == 9) fno->fname[j++] = '.'; /* Insert a . if extension is exist */
fno->fname[j++] = c;
}
fno->fname[j] = 0;
#endif
fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */
fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */
tm = ld_dword(dp->dir + DIR_ModTime); /* Timestamp */
fno->ftime = (WORD)tm; fno->fdate = (WORD)(tm >> 16);
}
#endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */
#if _USE_FIND && _FS_MINIMIZE <= 1
/*-----------------------------------------------------------------------*/
/* Pattern matching */
/*-----------------------------------------------------------------------*/
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 */
)
{
#if !_LFN_UNICODE
WCHAR chr;
chr = (BYTE)*(*ptr)++; /* Get a byte */
if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
#ifdef _EXCVT
if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
#else
if (IsDBCS1(chr) && IsDBCS2(**ptr)) { /* Get DBC 2nd byte if needed */
chr = chr << 8 | (BYTE)*(*ptr)++;
}
#endif
return chr;
#else
return ff_wtoupper(*(*ptr)++); /* Get a word and to upper */
#endif
}
static
int pattern_matching ( /* 0:not matched, 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 == 0) 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 top segment and create the object name in directory form */
/*-----------------------------------------------------------------------*/
static
FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
DIR* dp, /* Pointer to the directory object */
const TCHAR** path /* Pointer to pointer to the segment in the path string */
)
{
#if _USE_LFN != 0 /* LFN configuration */
BYTE b, cf;
WCHAR w, *lfn;
UINT i, ni, si, di;
const TCHAR *p;
/* Create LFN in Unicode */
p = *path; lfn = dp->obj.fs->lfnbuf; si = di = 0;
for (;;) {
w = p[si++]; /* Get a character */
if (w < ' ') break; /* Break if end of the path name */
if (w == '/' || w == '\\') { /* Break if a separator is found */
while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */
break;
}
if (di >= _MAX_LFN) return FR_INVALID_NAME; /* Reject too long 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)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */
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 the path */
#if _FS_RPATH != 0
if ((di == 1 && lfn[di - 1] == '.') ||
(di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */
lfn[di] = 0;
for (i = 0; i < 11; i++) /* Create dot name for SFN entry */
dp->fn[i] = (i < di) ? '.' : ' ';
dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
return FR_OK;
}
#endif
while (di) { /* Snip off trailing spaces and dots if exist */
w = lfn[di - 1];
if (w != ' ' && w != '.') break;
di--;
}
lfn[di] = 0; /* LFN is created */
if (di == 0) return FR_INVALID_NAME; /* Reject nul name */
/* 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) */
i = b = 0; ni = 8;
for (;;) {
w = lfn[si++]; /* Get an LFN character */
if (!w) break; /* Break on end of the LFN */
if (w == ' ' || (w == '.'