本文深入浅出地解析了FatFs通用FAT文件系统模块R0.12b版，介绍了其开源许可、错误处理、扇区大小定义、时间戳处理及文件锁定控制等功能。着重讲解了代码中关键宏定义与条件编译的应用，为理解和使用FatFs系统提供详实指导。
/*----------------------------------------------------------------------------/
/ 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 "ff.h"/* Declarations of FatFs API */
#include "diskio.h"/* Declarations of device I/O functions */
/*--------------------------------------------------------------------------
Module Private Definitions
---------------------------------------------------------------------------*/
#if _FATFS != 68020/* Revision ID */
#error Wrong include file (ff.h).
#endif
#defineABORT(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
#defineENTER_FF(fs){ if (!lock_fs(fs)) return FR_TIMEOUT; }
#defineLEAVE_FF(fs, res){ unlock_fs(fs, res); return res; }
#else
#defineENTER_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
#defineSS(fs)((UINT)_MAX_SS)/* Fixed sector size */
#else
#defineSS(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 _DF1S0x81/* DBC 1st byte range 1 start */
#define _DF1E0x9F/* DBC 1st byte range 1 end */
#define _DF2S0xE0/* DBC 1st byte range 2 start */
#define _DF2E0xFC/* DBC 1st byte range 2 end */
#define _DS1S0x40/* DBC 2nd byte range 1 start */
#define _DS1E0x7E/* DBC 2nd byte range 1 end */
#define _DS2S0x80/* DBC 2nd byte range 2 start */
#define _DS2E0xFC/* DBC 2nd byte range 2 end */
#elif _CODE_PAGE == 936/* Simplified Chinese GBK */
#define _DF1S0x81
#define _DF1E0xFE
#define _DS1S0x40
#define _DS1E0x7E
#define _DS2S0x80
#define _DS2E0xFE
#elif _CODE_PAGE == 949/* Korean */
#define _DF1S0x81
#define _DF1E0xFE
#define _DS1S0x41
#define _DS1E0x5A
#define _DS2S0x61
#define _DS2E0x7A
#define _DS3S0x81
#define _DS3E0xFE
#elif _CODE_PAGE == 950/* Traditional Chinese Big5 */
#define _DF1S0x81
#define _DF1E0xFE
#define _DS1S0x40
#define _DS1E0x7E
#define _DS2S0xA1
#define _DS2E0xFE
#elif _CODE_PAGE == 437/* U.S. */
#define _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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 _DF1S0
#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) */
#defineAM_VOL0x08/* Volume label */
#define AM_LFN0x0F/* LFN entry */
#define AM_MASK0x3F/* Mask of defined bits */
/* File access control and file status flags (internal use) */
#define FA_SEEKEND0x20/* Seek to end of the file on file open */
#define FA_MODIFIED0x40/* File has been modified */
#define FA_DIRTY0x80/* FIL.buf[] needs to be written-back */
/* Name status flags */
#define NSFLAG11/* Index of name status byte in fn[] */
#define NS_LOSS0x01/* Out of 8.3 format */
#define NS_LFN0x02/* Force to create LFN entry */
#define NS_LAST0x04/* Last segment */
#define NS_BODY0x08/* Lower case flag (body) */
#define NS_EXT0x10/* Lower case flag (ext) */
#define NS_DOT0x20/* Dot entry */
#define NS_NOLFN0x40/* Do not find LFN */
#define NS_NONAME0x80/* Not followed */
/* Limits and boundaries (differ from specs but correct for real DOS/Windows) */
#define MAX_FAT120xFF5/* Maximum number of FAT12 clusters */
#defineMAX_FAT160xFFF5/* Maximum number of FAT16 clusters */
#defineMAX_FAT320xFFFFFF5/* Maximum number of FAT32 clusters */
#defineMAX_EXFAT0x7FFFFFFD/* Maximum number of exFAT clusters (limited by implementation) */
#define MAX_DIR0x200000/* Maximum size of FAT directory */
#define MAX_DIR_EX0x10000000/* 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_JmpBoot0/* x86 jump instruction (3-byte) */
#define BS_OEMName3/* OEM name (8-byte) */
#define BPB_BytsPerSec11/* Sector size [byte] (WORD) */
#define BPB_SecPerClus13/* Cluster size [sector] (BYTE) */
#define BPB_RsvdSecCnt14/* Size of reserved area [sector] (WORD) */
#define BPB_NumFATs16/* Number of FATs (BYTE) */
#define BPB_RootEntCnt17/* Size of root directory area for FAT12/16 [entry] (WORD) */
#define BPB_TotSec1619/* Volume size (16-bit) [sector] (WORD) */
#define BPB_Media21/* Media descriptor byte (BYTE) */
#define BPB_FATSz1622/* FAT size (16-bit) [sector] (WORD) */
#define BPB_SecPerTrk24/* Track size for int13h [sector] (WORD) */
#define BPB_NumHeads26/* Number of heads for int13h (WORD) */
#define BPB_HiddSec28/* Volume offset from top of the drive (DWORD) */
#define BPB_TotSec3232/* Volume size (32-bit) [sector] (DWORD) */
#define BS_DrvNum36/* Physical drive number for int13h (BYTE) */
#define BS_NTres37/* Error flag (BYTE) */
#define BS_BootSig38/* Extended boot signature (BYTE) */
#define BS_VolID39/* Volume serial number (DWORD) */
#define BS_VolLab43/* Volume label string (8-byte) */
#define BS_FilSysType54/* File system type string (8-byte) */
#define BS_BootCode62/* Boot code (448-byte) */
#define BS_55AA510/* Signature word (WORD) */
#define BPB_FATSz3236/* FAT32: FAT size [sector] (DWORD) */
#define BPB_ExtFlags3240/* FAT32: Extended flags (WORD) */
#define BPB_FSVer3242/* FAT32: File system version (WORD) */
#define BPB_RootClus3244/* FAT32: Root directory cluster (DWORD) */
#define BPB_FSInfo3248/* FAT32: Offset of FSINFO sector (WORD) */
#define BPB_BkBootSec3250/* FAT32: Offset of backup boot sector (WORD) */
#define BS_DrvNum3264/* FAT32: Physical drive number for int13h (BYTE) */
#define BS_NTres3265/* FAT32: Error flag (BYTE) */
#define BS_BootSig3266/* FAT32: Extended boot signature (BYTE) */
#define BS_VolID3267/* FAT32: Volume serial number (DWORD) */
#define BS_VolLab3271/* FAT32: Volume label string (8-byte) */
#define BS_FilSysType3282/* FAT32: File system type string (8-byte) */
#define BS_BootCode3290/* FAT32: Boot code (420-byte) */
#define BPB_ZeroedEx11/* exFAT: MBZ field (53-byte) */
#define BPB_VolOfsEx64/* exFAT: Volume offset from top of the drive [sector] (QWORD) */
#define BPB_TotSecEx72/* exFAT: Volume size [sector] (QWORD) */
#define BPB_FatOfsEx80/* exFAT: FAT offset from top of the volume [sector] (DWORD) */
#define BPB_FatSzEx84/* exFAT: FAT size [sector] (DWORD) */
#define BPB_DataOfsEx88/* exFAT: Data offset from top of the volume [sector] (DWORD) */
#define BPB_NumClusEx92/* exFAT: Number of clusters (DWORD) */
#define BPB_RootClusEx96/* exFAT: Root directory cluster (DWORD) */
#define BPB_VolIDEx100/* exFAT: Volume serial number (DWORD) */
#define BPB_FSVerEx104/* exFAT: File system version (WORD) */
#define BPB_VolFlagEx106/* exFAT: Volume flags (BYTE) */
#define BPB_ActFatEx107/* exFAT: Active FAT flags (BYTE) */
#define BPB_BytsPerSecEx108/* exFAT: Log2 of sector size in byte (BYTE) */
#define BPB_SecPerClusEx109/* exFAT: Log2 of cluster size in sector (BYTE) */
#define BPB_NumFATsEx110/* exFAT: Number of FATs (BYTE) */
#define BPB_DrvNumEx111/* exFAT: Physical drive number for int13h (BYTE) */
#define BPB_PercInUseEx112/* exFAT: Percent in use (BYTE) */
#defineBPB_RsvdEx113/* exFAT: Reserved (7-byte) */
#define BS_BootCodeEx120/* exFAT: Boot code (390-byte) */
#defineFSI_LeadSig0/* FAT32 FSI: Leading signature (DWORD) */
#defineFSI_StrucSig484/* FAT32 FSI: Structure signature (DWORD) */
#defineFSI_Free_Count488/* FAT32 FSI: Number of free clusters (DWORD) */
#defineFSI_Nxt_Free492/* FAT32 FSI: Last allocated cluster (DWORD) */
#define MBR_Table446/* MBR: Offset of partition table in the MBR */
#defineSZ_PTE16/* MBR: Size of a partition table entry */
#define PTE_Boot0/* MBR PTE: Boot indicator */
#define PTE_StHead1/* MBR PTE: Start head */
#define PTE_StSec2/* MBR PTE: Start sector */
#define PTE_StCyl3/* MBR PTE: Start cylinder */
#define PTE_System4/* MBR PTE: System ID */
#define PTE_EdHead5/* MBR PTE: End head */
#define PTE_EdSec6/* MBR PTE: End sector */
#define PTE_EdCyl7/* MBR PTE: End cylinder */
#define PTE_StLba8/* MBR PTE: Start in LBA */
#define PTE_SizLba12/* MBR PTE: Size in LBA */
#defineDIR_Name0/* Short file name (11-byte) */
#defineDIR_Attr11/* Attribute (BYTE) */
#defineDIR_NTres12/* Lower case flag (BYTE) */
#define DIR_CrtTime1013/* Created time sub-second (BYTE) */
#defineDIR_CrtTime14/* Created time (DWORD) */
#define DIR_LstAccDate18/* Last accessed date (WORD) */
#defineDIR_FstClusHI20/* Higher 16-bit of first cluster (WORD) */
#defineDIR_ModTime22/* Modified time (DWORD) */
#defineDIR_FstClusLO26/* Lower 16-bit of first cluster (WORD) */
#defineDIR_FileSize28/* File size (DWORD) */
#defineLDIR_Ord0/* LFN entry order and LLE flag (BYTE) */
#defineLDIR_Attr11/* LFN attribute (BYTE) */
#defineLDIR_Type12/* LFN type (BYTE) */
#defineLDIR_Chksum13/* Checksum of the SFN entry (BYTE) */
#defineLDIR_FstClusLO26/* Must be zero (WORD) */
#defineXDIR_Type0/* Type of exFAT directory entry (BYTE) */
#defineXDIR_NumLabel1/* Number of volume label characters (BYTE) */
#defineXDIR_Label2/* Volume label (11-WORD) */
#defineXDIR_CaseSum4/* Sum of case conversion table (DWORD) */
#defineXDIR_NumSec1/* Number of secondary entries (BYTE) */
#defineXDIR_SetSum2/* Sum of the set of directory entries (WORD) */
#defineXDIR_Attr4/* File attribute (WORD) */
#defineXDIR_CrtTime8/* Created time (DWORD) */
#defineXDIR_ModTime12/* Modified time (DWORD) */
#defineXDIR_AccTime16/* Last accessed time (DWORD) */
#defineXDIR_CrtTime1020/* Created time subsecond (BYTE) */
#defineXDIR_ModTime1021/* Modified time subsecond (BYTE) */
#defineXDIR_CrtTZ22/* Created timezone (BYTE) */
#defineXDIR_ModTZ23/* Modified timezone (BYTE) */
#defineXDIR_AccTZ24/* Last accessed timezone (BYTE) */
#defineXDIR_GenFlags33/* Gneral secondary flags (WORD) */
#defineXDIR_NumName35/* Number of file name characters (BYTE) */
#defineXDIR_NameHash36/* Hash of file name (WORD) */
#define XDIR_ValidFileSize40/* Valid file size (QWORD) */
#defineXDIR_FstClus52/* First cluster of the file data (DWORD) */
#defineXDIR_FileSize56/* File/Directory size (QWORD) */
#defineSZDIRE32/* Size of a directory entry */
#defineLLEF0x40/* Last long entry flag in LDIR_Ord */
#defineDDEM0xE5/* Deleted directory entry mark set to DIR_Name[0] */
#defineRDDEM0x05/* 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 FATFS *FatFs[_VOLUMES];/* Pointer to the file system objects (logical drives) */
static WORD Fsid;/* File system mount ID */
#if _FS_RPATH != 0 && _VOLUMES >= 2
static BYTE CurrVol;/* Current drive */
#endif
#if _FS_LOCK != 0
static FILESEM Files[_FS_LOCK];/* Open object lock semaphores */
#endif
#if _USE_LFN == 0/* Non-LFN configuration */
#defineDEF_NAMBUF
#define INIT_NAMBUF(fs)
#defineFREE_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 BYTEDirBuf[SZDIRE*19];/* Directory entry block scratchpad buffer (19 entries in size) */
#endif
static WCHAR LfnBuf[_MAX_LFN+1];/* LFN enabled with static working buffer */
#defineDEF_NAMBUF
#define INIT_NAMBUF(fs)
#defineFREE_NAMBUF()
#elif _USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */
#if _FS_EXFAT
#defineDEF_NAMBUFWCHAR lbuf[_MAX_LFN+1]; BYTE dbuf[SZDIRE*19];
#define INIT_NAMBUF(fs){ (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }
#defineFREE_NAMBUF()
#else
#defineDEF_NAMBUFWCHAR lbuf[_MAX_LFN+1];
#define INIT_NAMBUF(fs){ (fs)->lfnbuf = lbuf; }
#defineFREE_NAMBUF()
#endif
#elif _USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */
#if _FS_EXFAT
#defineDEF_NAMBUFWCHAR *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); }
#defineFREE_NAMBUF()ff_memfree(lfn)
#else
#defineDEF_NAMBUFWCHAR *lfn;
#define INIT_NAMBUF(fs){ lfn = ff_memalloc((_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }
#defineFREE_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 */
/*-----------------------------------------------------------------------*/
/* 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 (cnt) {
do *d++ = *s++; while (--cnt);
}
}
/* Fill memory block */
static
void mem_set (void* dst, int val, UINT cnt) {
BYTE *d = (BYTE*)dst;
do *d++ = (BYTE)val; while (--cnt);
}
/* Compare memory block */
static
int mem_cmp (const void* dst, const void* src, UINT cnt) {/* ZR:same, NZ:different */
const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
int r = 0;
do {
r = *d++ - *s++;
} while (--cnt && r == 0);
return r;
}
/* 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 == '.' && 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) {/* Is this 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 DDEM, replace it with RDDEM */
if (ni == 8) b <<= 2;
if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN;/* Create LFN entry when there are composite capitals */
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/* _USE_LFN != 0 : Non-LFN configuration */
BYTE c, d, *sfn;
UINT ni, si, i;
const char *p;
/* Create file name in directory form */
p = *path; sfn = dp->fn;
mem_set(sfn, ' ', 11);
si = i = 0; ni = 8;
#if _FS_RPATH != 0
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 the path */
return FR_OK;
}
#endif
for (;;) {
c = (BYTE)p[si++];
if (c <= ' ') break; /* Break if end of the path name */
if (c == '/' || c == '\\') {/* Break if a separator is found */
while (p[si] == '/' || p[si] == '\\') si++;/* Skip duplicated separator if exist */
break;
}
if (c == '.' || i >= ni) {/* End of body or over size? */
if (ni == 11 || c != '.') return FR_INVALID_NAME;/* Over size or invalid dot */
i = 8; ni = 11;/* Goto extension */
continue;
}
if (c >= 0x80) {/* Extended character? */
#ifdef _EXCVT
c = ExCvt[c - 0x80];/* To upper extended characters (SBCS cfg) */
#else
#if !_DF1S
return FR_INVALID_NAME;/* Reject extended characters (ASCII only cfg) */
#endif
#endif
}
if (IsDBCS1(c)) {/* Check if it is a DBC 1st byte (always false at SBCS cfg.) */
d = (BYTE)p[si++];/* Get 2nd byte */
if (!IsDBCS2(d) || i >= ni - 1) return FR_INVALID_NAME;/* Reject invalid DBC */
sfn[i++] = c;
sfn[i++] = d;
} else {/* SBC */
if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME;/* Reject illegal chrs for SFN */
if (IsLower(c)) c -= 0x20;/* To upper */
sfn[i++] = c;
}
}
*path = p + si;/* Return pointer to the next segment */
if (i == 0) return FR_INVALID_NAME;/* Reject nul string */
if (sfn[0] == DDEM) sfn[0] = RDDEM;/* If the first character collides with DDEM, replace it with RDDEM */
sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0;/* Set last segment flag if end of the path */
return FR_OK;
#endif /* _USE_LFN != 0 */
}
/*-----------------------------------------------------------------------*/
/* 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 ns;
_FDID *obj = &dp->obj;
FATFS *fs = obj->fs;
#if _FS_RPATH != 0
if (*path != '/' && *path != '\\') {/* Without heading separator */
obj->sclust = fs->cdir;/* Start from the current directory */
} else
#endif
{/* With heading separator */
while (*path == '/' || *path == '\\') path++;/* Strip heading separator */
obj->sclust = 0;/* Start from the root directory */
}
#if _FS_EXFAT && _FS_RPATH != 0
if (fs->fs_type == FS_EXFAT && obj->sclust) {/* Retrieve the sub-directory status if needed */
DIR dj;
obj->c_scl = fs->cdc_scl;
obj->c_size = fs->cdc_size;
obj->c_ofs = fs->cdc_ofs;
res = load_obj_dir(&dj, obj);
if (res != FR_OK) return res;
obj->objsize = ld_dword(fs->dirbuf + XDIR_FileSize);
obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;
}
#endif
if ((UINT)*path < ' ') {/* Null path name is the origin directory itself */
dp->fn[NSFLAG] = NS_NONAME;
res = dir_sdi(dp, 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 segment 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, stay there */
if (!(ns & NS_LAST)) continue;/* Continue to follow if not last segment */
dp->fn[NSFLAG] = NS_NONAME;
res = FR_OK;
} 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. */
/* Get into the sub-directory */
if (!(obj->attr & AM_DIR)) {/* It is not a sub-directory and cannot follow */
res = FR_NO_PATH; break;
}
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
obj->c_scl = obj->sclust;/* Save containing directory information for next dir */
obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat;
obj->c_ofs = dp->blk_ofs;
obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus);/* Open next directory */
obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;
obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
} else
#endif
{
obj->sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs));/* Open next directory */
}
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Get logical drive number from path name */
/*-----------------------------------------------------------------------*/
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 != 0 && _VOLUMES >= 2
vol = CurrVol;/* Current drive */
#else
vol = 0;/* Drive 0 */
#endif
}
return vol;
}
/*-----------------------------------------------------------------------*/
/* Load a sector and check if it is an FAT boot sector */
/*-----------------------------------------------------------------------*/
static
BYTE check_fs (/* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4:Disk error */
FATFS* fs,/* File system object */
DWORD sect/* Sector# (lba) to check if it is an FAT-VBR or not */
)
{
fs->wflag = 0; fs->winsect = 0xFFFFFFFF;/* Invaidate window */
if (move_window(fs, sect) != FR_OK) return 4;/* Load boot record */
if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3;/* Check boot record signature (always placed at offset 510 even if the sector size is >512) */
if (fs->win[BS_JmpBoot] == 0xE9 || (fs->win[BS_JmpBoot] == 0xEB && fs->win[BS_JmpBoot + 2] == 0x90)) {
if ((ld_dword(fs->win + BS_FilSysType) & 0xFFFFFF) == 0x544146) return 0;/* Check "FAT" string */
if (ld_dword(fs->win + BS_FilSysType32) == 0x33544146) return 0;/* Check "FAT3" string */
}
#if _FS_EXFAT
if (!mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1;
#endif
return 2;
}
/*-----------------------------------------------------------------------*/
/* Find logical drive and check if the volume is mounted */
/*-----------------------------------------------------------------------*/
static
FRESULT find_volume (/* FR_OK(0): successful, !=0: any error occurred */
const TCHAR** path,/* Pointer to pointer to the path name (drive number) */
FATFS** rfs,/* Pointer to pointer to the found file system object */
BYTE mode/* !=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 */
*rfs = 0;
vol = get_ldnumber(path);
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 */
mode &= (BYTE)~FA_READ;/* Desired access mode, write access or not */
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 && mode && (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 && mode && (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) return FR_DISK_ERR;
if (SS(fs) > _MAX_SS || SS(fs) < _MIN_SS || (SS(fs) & (SS(fs) - 1))) 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-VBR as SFD */
if (fmt == 2 || (fmt < 2 && LD2PT(vol) != 0)) {/* Not an FAT-VBR or forced partition number */
for (i = 0; i < 4; i++) {/* Get partition offset */
pt = fs->win + (MBR_Table + i * SZ_PTE);
br[i] = pt[PTE_System] ? ld_dword(pt + PTE_StLba) : 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) : 3;/* Check the partition */
} while (!LD2PT(vol) && fmt >= 2 && ++i < 4);
}
if (fmt == 4) return FR_DISK_ERR;/* An error occured in the disk I/O layer */
if (fmt >= 2) return FR_NO_FILESYSTEM;/* No FAT volume is found */
/* An FAT volume is found. Following code initializes the file system object */
#if _FS_EXFAT
if (fmt == 1) {
QWORD maxlba;
for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ;/* Check zero filler */
if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM;
if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM;/* Check exFAT revision (Must be 1.0) */
if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs))/* (BPB_BytsPerSecEx must be equal to the physical sector size) */
return FR_NO_FILESYSTEM;
maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect;/* Last LBA + 1 of the volume */
if (maxlba >= 0x100000000) return FR_NO_FILESYSTEM;/* (It cannot be handled in 32-bit LBA) */
fs->fsize = ld_dword(fs->win + BPB_FatSzEx);/* Number of sectors per FAT */
fs->n_fats = fs->win[BPB_NumFATsEx];/* Number of FATs */
if (fs->n_fats != 1) return FR_NO_FILESYSTEM;/* (Supports only 1 FAT) */
fs->csize = 1 << fs->win[BPB_SecPerClusEx];/* Cluster size */
if (fs->csize == 0)return FR_NO_FILESYSTEM;/* (Must be 1..32768) */
nclst = ld_dword(fs->win + BPB_NumClusEx);/* Number of clusters */
if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM;/* (Too many clusters) */
fs->n_fatent = nclst + 2;
/* Boundaries and Limits */
fs->volbase = bsect;
fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx);
fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx);
if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM;/* (Volume size must not be smaller than the size requiered) */
fs->dirbase = ld_dword(fs->win + BPB_RootClusEx);
/* Check if bitmap location is in assumption (at the first cluster) */
if (move_window(fs, clust2sect(fs, fs->dirbase)) != FR_OK) return FR_DISK_ERR;
for (i = 0; i < SS(fs); i += SZDIRE) {
if (fs->win[i] == 0x81 && ld_dword(fs->win + i + 20) == 2) break;/* 81 entry with cluster #2? */
}
if (i == SS(fs)) return FR_NO_FILESYSTEM;
#if !_FS_READONLY
fs->last_clst = fs->free_clst = 0xFFFFFFFF;/* Initialize cluster allocation information */
#endif
fmt = FS_EXFAT;/* FAT sub-type */
} else
#endif/* _FS_EXFAT */
{
if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM;/* (BPB_BytsPerSec must be equal to the physical sector size) */
fasize = ld_word(fs->win + BPB_FATSz16);/* Number of sectors per FAT */
if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32);
fs->fsize = fasize;
fs->n_fats = fs->win[BPB_NumFATs];/* Number of FATs */
if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM;/* (Must be 1 or 2) */
fasize *= fs->n_fats;/* Number of sectors for FAT area */
fs->csize = fs->win[BPB_SecPerClus];/* Cluster size */
if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM;/* (Must be power of 2) */
fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt);/* Number of root directory entries */
if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM;/* (Must be sector aligned) */
tsect = ld_word(fs->win + BPB_TotSec16);/* Number of sectors on the volume */
if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32);
nrsv = ld_word(fs->win + BPB_RsvdSecCnt);/* Number of reserved sectors */
if (nrsv == 0) return FR_NO_FILESYSTEM;/* (Must not be 0) */
/* Determine the FAT sub type */
sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE);/* RSV + FAT + DIR */
if (tsect < sysect) return FR_NO_FILESYSTEM;/* (Invalid volume size) */
nclst = (tsect - sysect) / fs->csize;/* Number of clusters */
if (nclst == 0) return FR_NO_FILESYSTEM;/* (Invalid volume size) */
fmt = FS_FAT32;
if (nclst <= MAX_FAT16) fmt = FS_FAT16;
if (nclst <= MAX_FAT12) fmt = FS_FAT12;
/* 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 (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM;/* (Must be FAT32 revision 0.0) */
if (fs->n_rootdir) return FR_NO_FILESYSTEM;/* (BPB_RootEntCnt must be 0) */
fs->dirbase = ld_dword(fs->win + BPB_RootClus32);/* Root directory start cluster */
szbfat = fs->n_fatent * 4;/* (Needed FAT size) */
} else {
if (fs->n_rootdir == 0)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)) return FR_NO_FILESYSTEM;/* (BPB_FATSz must not be less than the size needed) */
#if !_FS_READONLY
/* Get FSINFO if available */
fs->last_clst = fs->free_clst = 0xFFFFFFFF;/* Initialize cluster allocation information */
fs->fsi_flag = 0x80;
#if (_FS_NOFSINFO & 3) != 3
if (fmt == FS_FAT32/* Enable FSINFO only if FAT32 and BPB_FSInfo32 == 1 */
&& ld_word(fs->win + BPB_FSInfo32) == 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_clst = ld_dword(fs->win + FSI_Free_Count);
#endif
#if (_FS_NOFSINFO & 2) == 0
fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free);
#endif
}
}
#endif/* (_FS_NOFSINFO & 3) != 3 */
#endif/* !_FS_READONLY */
}
fs->fs_type = fmt;/* FAT sub-type */
fs->id = ++Fsid;/* File system mount ID */
#if _USE_LFN == 1
fs->lfnbuf = LfnBuf;/* Static LFN working buffer */
#if _FS_EXFAT
fs->dirbuf = DirBuf;/* Static directory block working buuffer */
#endif
#endif
#if _FS_RPATH != 0
fs->cdir = 0;/* Initialize current directory */
#endif
#if _FS_LOCK != 0/* Clear file lock semaphores */
clear_lock(fs);
#endif
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Check if the file/directory object is valid or not */
/*-----------------------------------------------------------------------*/
static
FRESULT validate (/* Returns FR_OK or FR_INVALID_OBJECT */
_FDID* obj,/* Pointer to the _OBJ, the 1st member in the FIL/DIR object, to check validity */
FATFS** fs/* Pointer to pointer to the owner file system object to return */
)
{
FRESULT res;
if (!obj || !obj->fs || !obj->fs->fs_type || obj->fs->id != obj->id || (disk_status(obj->fs->drv) & STA_NOINIT)) {
*fs = 0;/* The object is invalid */
res = FR_INVALID_OBJECT;
} else {
*fs = obj->fs;/* Owner file sytem object */
ENTER_FF(obj->fs);/* Lock file system */
res = FR_OK;
}
return res;
}
/*---------------------------------------------------------------------------
Public Functions (FatFs API)
----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* 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/* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */
)
{
FATFS *cfs;
int vol;
FRESULT res;
const TCHAR *rp = path;
/* Get logical drive number */
vol = get_ldnumber(&rp);
if (vol < 0) return FR_INVALID_DRIVE;
cfs = FatFs[vol];/* Pointer to fs object */
if (cfs) {
#if _FS_LOCK != 0
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(&path, &fs, 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;
FATFS *fs;
#if !_FS_READONLY
DWORD dw, cl, bcs, clst, sc;
FSIZE_t ofs;
#endif
DEF_NAMBUF
if (!fp) return FR_INVALID_OBJECT;
/* Get logical drive */
mode &= _FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND | FA_SEEKEND;
res = find_volume(&path, &fs, mode);
if (res == FR_OK) {
dj.obj.fs = fs;
INIT_NAMBUF(fs);
res = follow_path(&dj, path);/* Follow the file path */
#if !_FS_READONLY/* R/W configuration */
if (res == FR_OK) {
if (dj.fn[NSFLAG] & NS_NONAME) {/* Origin directory itself? */
res = FR_INVALID_NAME;
}
#if _FS_LOCK != 0
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 != 0
res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
#else
res = dir_register(&dj);
#endif
mode |= FA_CREATE_ALWAYS;/* File is created */
}
else {/* Any object is already existing */
if (dj.obj.attr & (AM_RDO | AM_DIR)) {/* Cannot overwrite it (R/O or DIR) */
res = FR_DENIED;
} else {
if (mode & FA_CREATE_NEW) res = FR_EXIST;/* Cannot create as new file */
}
}
if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) {/* Truncate it if overwrite mode */
dw = GET_FATTIME();
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
/* Get current allocation info */
fp->obj.fs = fs;
fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus);
fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
/* Initialize directory entry block */
st_dword(fs->dirbuf + XDIR_CrtTime, dw);/* Set created time */
fs->dirbuf[XDIR_CrtTime10] = 0;
st_dword(fs->dirbuf + XDIR_ModTime, dw);/* Set modified time */
fs->dirbuf[XDIR_ModTime10] = 0;
fs->dirbuf[XDIR_Attr] = AM_ARC;/* Reset attribute */
st_dword(fs->dirbuf + XDIR_FstClus, 0);/* Reset file allocation info */
st_qword(fs->dirbuf + XDIR_FileSize, 0);
st_qword(fs->dirbuf + XDIR_ValidFileSize, 0);
fs->dirbuf[XDIR_GenFlags] = 1;
res = store_xdir(&dj);
if (res == FR_OK && fp->obj.sclust) {/* Remove the cluster chain if exist */
res = remove_chain(&fp->obj, fp->obj.sclust, 0);
fs->last_clst = fp->obj.sclust - 1;/* Reuse the cluster hole */
}
} else
#endif
{
/* Clean directory info */
st_dword(dj.dir + DIR_CrtTime, dw);/* Set created time */
st_dword(dj.dir + DIR_ModTime, dw);/* Set modified time */
dj.dir[DIR_Attr] = AM_ARC;/* Reset attribute */
cl = ld_clust(fs, dj.dir);/* Get cluster chain */
st_clust(fs, dj.dir, 0);/* Reset file allocation info */
st_dword(dj.dir + DIR_FileSize, 0);
fs->wflag = 1;
if (cl) {/* Remove the cluster chain if exist */
dw = fs->winsect;
res = remove_chain(&dj.obj, cl, 0);
if (res == FR_OK) {
res = move_window(fs, dw);
fs->last_clst = cl - 1;/* Reuse the cluster hole */
}
}
}
}
}
else {/* Open an existing file */
if (res == FR_OK) {/* Following succeeded */
if (dj.obj.attr & AM_DIR) {/* It is a directory */
res = FR_NO_FILE;
} else {
if ((mode & FA_WRITE) && (dj.obj.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_MODIFIED;
fp->dir_sect = fs->winsect;/* Pointer to the directory entry */
fp->dir_ptr = dj.dir;
#if _FS_LOCK != 0
fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
if (!fp->obj.lockid) res = FR_INT_ERR;
#endif
}
#else/* R/O configuration */
if (res == FR_OK) {
if (dj.fn[NSFLAG] & NS_NONAME) {/* Origin directory itself? */
res = FR_INVALID_NAME;
} else {
if (dj.obj.attr & AM_DIR) {/* It is a directory */
res = FR_NO_FILE;
}
}
}
#endif
if (res == FR_OK) {
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus);/* Get allocation info */
fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
fp->obj.c_scl = dj.obj.sclust;
fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
fp->obj.c_ofs = dj.blk_ofs;
} else
#endif
{
fp->obj.sclust = ld_clust(fs, dj.dir);/* Get allocation info */
fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize);
}
#if _USE_FASTSEEK
fp->cltbl = 0;/* Disable fast seek mode */
#endif
fp->obj.fs = fs; /* Validate the file object */
fp->obj.id = fs->id;
fp->flag = mode;/* Set file access mode */
fp->err = 0;/* Clear error flag */
fp->sect = 0;/* Invalidate current data sector */
fp->fptr = 0;/* Set file pointer top of the file */
#if !_FS_READONLY
#if !_FS_TINY
mem_set(fp->buf, 0, _MAX_SS);/* Clear sector buffer */
#endif
if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) {/* Seek to end of file if FA_OPEN_APPEND is specified */
fp->fptr = fp->obj.objsize;/* Offset to seek */
bcs = (DWORD)fs->csize * SS(fs);/* Cluster size in byte */
clst = fp->obj.sclust;/* Follow the cluster chain */
for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) {
clst = get_fat(&fp->obj, clst);
if (clst <= 1) res = FR_INT_ERR;
if (clst == 0xFFFFFFFF) res = FR_DISK_ERR;
}
fp->clust = clst;
if (res == FR_OK && ofs % SS(fs)) {/* Fill sector buffer if not on the sector boundary */
if ((sc = clust2sect(fs, clst)) == 0) {
res = FR_INT_ERR;
} else {
fp->sect = sc + (DWORD)(ofs / SS(fs));
#if !_FS_TINY
if (disk_read(fs->drv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;
#endif
}
}
}
#endif
}
FREE_NAMBUF();
}
if (res != FR_OK) fp->obj.fs = 0;/* Invalidate file object on error */
LEAVE_FF(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;
FATFS *fs;
DWORD clst, sect;
FSIZE_t remain;
UINT rcnt, cc, csect;
BYTE *rbuff = (BYTE*)buff;
*br = 0;/* Clear read byte counter */
res = validate(&fp->obj, &fs);/* Check validity of the file object */
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);/* Check validity */
if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
remain = fp->obj.objsize - 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(fs) == 0) {/* On the sector boundary? */
csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1));/* Sector offset in the cluster */
if (csect == 0) {/* On the cluster boundary? */
if (fp->fptr == 0) {/* On the top of the file? */
clst = fp->obj.sclust;/* Follow cluster chain 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->obj, fp->clust);/* Follow cluster chain on the FAT */
}
}
if (clst < 2) ABORT(fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
fp->clust = clst;/* Update current cluster */
}
sect = clust2sect(fs, fp->clust);/* Get current sector */
if (!sect) ABORT(fs, FR_INT_ERR);
sect += csect;
cc = btr / SS(fs);/* When remaining bytes >= sector size, */
if (cc) {/* Read maximum contiguous sectors directly */
if (csect + cc > fs->csize) {/* Clip at cluster boundary */
cc = fs->csize - csect;
}
if (disk_read(fs->drv, rbuff, sect, cc) != RES_OK) ABORT(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 (fs->wflag && fs->winsect - sect < cc) {
mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs));
}
#else
if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) {
mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs));
}
#endif
#endif
rcnt = SS(fs) * cc;/* Number of bytes transferred */
continue;
}
#if !_FS_TINY
if (fp->sect != sect) {/* Load data sector if not in cache */
#if !_FS_READONLY
if (fp->flag & FA_DIRTY) {/* Write-back dirty sector cache */
if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
fp->flag &= (BYTE)~FA_DIRTY;
}
#endif
if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK)ABORT(fs, FR_DISK_ERR);/* Fill sector cache */
}
#endif
fp->sect = sect;
}
rcnt = SS(fs) - (UINT)fp->fptr % SS(fs);/* Number of bytes left in the sector */
if (rcnt > btr) rcnt = btr;/* Clip it by btr if needed */
#if _FS_TINY
if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR);/* Move sector window */
mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt);/* Extract partial sector */
#else
mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt);/* Extract partial sector */
#endif
}
LEAVE_FF(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;
FATFS *fs;
DWORD clst, sect;
UINT wcnt, cc, csect;
const BYTE *wbuff = (const BYTE*)buff;
*bw = 0;/* Clear write byte counter */
res = validate(&fp->obj, &fs);/* Check validity of the file object */
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);/* Check validity */
if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);/* Check access mode */
/* Check fptr wrap-around (file size cannot reach 4GiB on FATxx) */
if ((!_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) {
btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr);
}
for ( ; btw;/* Repeat until all data written */
wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize, *bw += wcnt, btw -= wcnt) {
if (fp->fptr % SS(fs) == 0) {/* On the sector boundary? */
csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1);/* Sector offset in the cluster */
if (csect == 0) {/* On the cluster boundary? */
if (fp->fptr == 0) {/* On the top of the file? */
clst = fp->obj.sclust;/* Follow from the origin */
if (clst == 0) {/* If no cluster is allocated, */
clst = create_chain(&fp->obj, 0);/* create a new cluster chain */
}
} else {/* On the 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->obj, 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(fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
fp->clust = clst;/* Update current cluster */
if (fp->obj.sclust == 0) fp->obj.sclust = clst;/* Set start cluster if the first write */
}
#if _FS_TINY
if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);/* Write-back sector cache */
#else
if (fp->flag & FA_DIRTY) {/* Write-back sector cache */
if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
fp->flag &= (BYTE)~FA_DIRTY;
}
#endif
sect = clust2sect(fs, fp->clust);/* Get current sector */
if (!sect) ABORT(fs, FR_INT_ERR);
sect += csect;
cc = btw / SS(fs);/* When remaining bytes >= sector size, */
if (cc) {/* Write maximum contiguous sectors directly */
if (csect + cc > fs->csize) {/* Clip at cluster boundary */
cc = fs->csize - csect;
}
if (disk_write(fs->drv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
#if _FS_MINIMIZE <= 2
#if _FS_TINY
if (fs->winsect - sect < cc) {/* Refill sector cache if it gets invalidated by the direct write */
mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs));
fs->wflag = 0;
}
#else
if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs));
fp->flag &= (BYTE)~FA_DIRTY;
}
#endif
#endif
wcnt = SS(fs) * cc;/* Number of bytes transferred */
continue;
}
#if _FS_TINY
if (fp->fptr >= fp->obj.objsize) {/* Avoid silly cache filling on the growing edge */
if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);
fs->winsect = sect;
}
#else
if (fp->sect != sect && /* Fill sector cache with file data */
fp->fptr < fp->obj.objsize &&
disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) {
ABORT(fs, FR_DISK_ERR);
}
#endif
fp->sect = sect;
}
wcnt = SS(fs) - (UINT)fp->fptr % SS(fs);/* Number of bytes left in the sector */
if (wcnt > btw) wcnt = btw;/* Clip it by btw if needed */
#if _FS_TINY
if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR);/* Move sector window */
mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt);/* Fit data to the sector */
fs->wflag = 1;
#else
mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt);/* Fit data to the sector */
fp->flag |= FA_DIRTY;
#endif
}
fp->flag |= FA_MODIFIED;/* Set file change flag */
LEAVE_FF(fs, FR_OK);
}
/*-----------------------------------------------------------------------*/
/* Synchronize the File */
/*-----------------------------------------------------------------------*/
FRESULT f_sync (
FIL* fp/* Pointer to the file object */
)
{
FRESULT res;
FATFS *fs;
DWORD tm;
BYTE *dir;
DEF_NAMBUF
res = validate(&fp->obj, &fs);/* Check validity of the file object */
if (res == FR_OK) {
if (fp->flag & FA_MODIFIED) {/* Is there any change to the file? */
#if !_FS_TINY
if (fp->flag & FA_DIRTY) {/* Write-back cached data if needed */
if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR);
fp->flag &= (BYTE)~FA_DIRTY;
}
#endif
/* Update the directory entry */
tm = GET_FATTIME();/* Modified time */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
res = fill_fat_chain(&fp->obj);/* Create FAT chain if needed */
if (res == FR_OK) {
DIR dj;
INIT_NAMBUF(fs);
res = load_obj_dir(&dj, &fp->obj);/* Load directory entry block */
if (res == FR_OK) {
fs->dirbuf[XDIR_Attr] |= AM_ARC;/* Set archive bit */
fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1;/* Update file allocation info */
st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust);
st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize);
st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize);
st_dword(fs->dirbuf + XDIR_ModTime, tm);/* Update modified time */
fs->dirbuf[XDIR_ModTime10] = 0;
st_dword(fs->dirbuf + XDIR_AccTime, 0);
res = store_xdir(&dj);/* Restore it to the directory */
if (res == FR_OK) {
res = sync_fs(fs);
fp->flag &= (BYTE)~FA_MODIFIED;
}
}
FREE_NAMBUF();
}
} else
#endif
{
res = move_window(fs, fp->dir_sect);
if (res == FR_OK) {
dir = fp->dir_ptr;
dir[DIR_Attr] |= AM_ARC;/* Set archive bit */
st_clust(fp->obj.fs, dir, fp->obj.sclust);/* Update file allocation info */
st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize);/* Update file size */
st_dword(dir + DIR_ModTime, tm);/* Update modified time */
st_word(dir + DIR_LstAccDate, 0);
fs->wflag = 1;
res = sync_fs(fs);/* Restore it to the directory */
fp->flag &= (BYTE)~FA_MODIFIED;
}
}
}
}
LEAVE_FF(fs, res);
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Close File */
/*-----------------------------------------------------------------------*/
FRESULT f_close (
FIL* fp/* Pointer to the file object to be closed */
)
{
FRESULT res;
FATFS *fs;
#if !_FS_READONLY
res = f_sync(fp);/* Flush cached data */
if (res == FR_OK)
#endif
{
res = validate(&fp->obj, &fs);/* Lock volume */
if (res == FR_OK) {
#if _FS_LOCK != 0
res = dec_lock(fp->obj.lockid);/* Decrement file open counter */
if (res == FR_OK)
#endif
{
fp->obj.fs = 0;/* Invalidate file object */
}
#if _FS_REENTRANT
unlock_fs(fs, FR_OK);/* Unlock volume */
#endif
}
}
return res;
}
#if _FS_RPATH >= 1
/*-----------------------------------------------------------------------*/
/* Change Current Directory or Current Drive, Get Current Directory */
/*-----------------------------------------------------------------------*/
#if _VOLUMES >= 2
FRESULT f_chdrive (
const TCHAR* path/* Drive number */
)
{
int vol;
/* Get logical drive number */
vol = get_ldnumber(&path);
if (vol < 0) return FR_INVALID_DRIVE;
CurrVol = (BYTE)vol;/* Set it as current volume */
return FR_OK;
}
#endif
FRESULT f_chdir (
const TCHAR* path/* Pointer to the directory path */
)
{
FRESULT res;
DIR dj;
FATFS *fs;
DEF_NAMBUF
/* Get logical drive */
res = find_volume(&path, &fs, 0);
if (res == FR_OK) {
dj.obj.fs = fs;
INIT_NAMBUF(fs);
res = follow_path(&dj, path);/* Follow the path */
if (res == FR_OK) {/* Follow completed */
if (dj.fn[NSFLAG] & NS_NONAME) {
fs->cdir = dj.obj.sclust;/* It is the start directory itself */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
fs->cdc_scl = dj.obj.c_scl;
fs->cdc_size = dj.obj.c_size;
fs->cdc_ofs = dj.obj.c_ofs;
}
#endif
} else {
if (dj.obj.attr & AM_DIR) {/* It is a sub-directory */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus);/* Sub-directory cluster */
fs->cdc_scl = dj.obj.sclust;/* Save containing directory information */
fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
fs->cdc_ofs = dj.blk_ofs;
} else
#endif
{
fs->cdir = ld_clust(fs, dj.dir);/* Sub-directory cluster */
}
} else {
res = FR_NO_PATH;/* Reached but a file */
}
}
}
FREE_NAMBUF();
if (res == FR_NO_FILE) res = FR_NO_PATH;
}
LEAVE_FF(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;
FATFS *fs;
UINT i, n;
DWORD ccl;
TCHAR *tp;
FILINFO fno;
DEF_NAMBUF
*buff = 0;
/* Get logical drive */
res = find_volume((const TCHAR**)&buff, &fs, 0);/* Get current volume */
if (res == FR_OK) {
dj.obj.fs = fs;
INIT_NAMBUF(fs);
i = len;/* Bottom of buffer (directory stack base) */
if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {/* (Cannot do getcwd on exFAT and returns root path) */
dj.obj.sclust = fs->cdir;/* Start to follow upper directory from current directory */
while ((ccl = dj.obj.sclust) != 0) {/* Repeat while current directory is a sub-directory */
res = dir_sdi(&dj, 1 * SZDIRE);/* Get parent directory */
if (res != FR_OK) break;
res = move_window(fs, dj.sect);
if (res != FR_OK) break;
dj.obj.sclust = ld_clust(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(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;
get_fileinfo(&dj, &fno);/* Get the directory name and push it to the buffer */
for (n = 0; fno.fname[n]; n++) ;
if (i < n + 3) {
res = FR_NOT_ENOUGH_CORE; break;
}
while (n) buff[--i] = fno.fname[--n];
buff[--i] = '/';
}
}
tp = buff;
if (res == FR_OK) {
#if _VOLUMES >= 2
*tp++ = '0' + CurrVol;/* Put drive number */
*tp++ = ':';
#endif
if (i == len) {/* Root-directory */
*tp++ = '/';
} else {/* Sub-directroy */
do/* Add stacked path str */
*tp++ = buff[i++];
while (i < len);
}
}
*tp = 0;
FREE_NAMBUF();
}
LEAVE_FF(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 */
FSIZE_t ofs/* File pointer from top of file */
)
{
FRESULT res;
FATFS *fs;
DWORD clst, bcs, nsect;
FSIZE_t ifptr;
#if _USE_FASTSEEK
DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
#endif
res = validate(&fp->obj, &fs);/* Check validity of the file object */
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);/* Check validity */
#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->obj.sclust;/* Origin 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->obj, cl);
if (cl <= 1) ABORT(fs, FR_INT_ERR);
if (cl == 0xFFFFFFFF) ABORT(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 < 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->obj.objsize) ofs = fp->obj.objsize;/* Clip offset at the file size */
fp->fptr = ofs;/* Set file pointer */
if (ofs) {
fp->clust = clmt_clust(fp, ofs - 1);
dsc = clust2sect(fs, fp->clust);
if (!dsc) ABORT(fs, FR_INT_ERR);
dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1);
if (fp->fptr % SS(fs) && dsc != fp->sect) {/* Refill sector cache if needed */
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA_DIRTY) {/* Write-back dirty sector cache */
if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
fp->flag &= (BYTE)~FA_DIRTY;
}
#endif
if (disk_read(fs->drv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);/* Load current sector */
#endif
fp->sect = dsc;
}
}
}
} else
#endif
/* Normal Seek */
{
#if _FS_EXFAT
if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF;/* Clip at 4GiB-1 if at FATxx */
#endif
if (ofs > fp->obj.objsize && (_FS_READONLY || !(fp->flag & FA_WRITE))) {/* In read-only mode, clip offset with the file size */
ofs = fp->obj.objsize;
}
ifptr = fp->fptr;
fp->fptr = nsect = 0;
if (ofs) {
bcs = (DWORD)fs->csize * SS(fs);/* Cluster size (byte) */
if (ifptr > 0 &&
(ofs - 1) / bcs >= (ifptr - 1) / bcs) {/* When seek to same or following cluster, */
fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1);/* start from the current cluster */
ofs -= fp->fptr;
clst = fp->clust;
} else {/* When seek to back cluster, */
clst = fp->obj.sclust;/* start from the first cluster */
#if !_FS_READONLY
if (clst == 0) {/* If no cluster chain, create a new chain */
clst = create_chain(&fp->obj, 0);
if (clst == 1) ABORT(fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
fp->obj.sclust = clst;
}
#endif
fp->clust = clst;
}
if (clst != 0) {
while (ofs > bcs) {/* Cluster following loop */
ofs -= bcs; fp->fptr += bcs;
#if !_FS_READONLY
if (fp->flag & FA_WRITE) {/* Check if in write mode or not */
if (_FS_EXFAT && fp->fptr > fp->obj.objsize) {/* No FAT chain object needs correct objsize to generate FAT value */
fp->obj.objsize = fp->fptr;
fp->flag |= FA_MODIFIED;
}
clst = create_chain(&fp->obj, clst);/* Follow chain with forceed stretch */
if (clst == 0) {/* Clip file size in case of disk full */
ofs = 0; break;
}
} else
#endif
{
clst = get_fat(&fp->obj, clst);/* Follow cluster chain if not in write mode */
}
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR);
fp->clust = clst;
}
fp->fptr += ofs;
if (ofs % SS(fs)) {
nsect = clust2sect(fs, clst);/* Current sector */
if (!nsect) ABORT(fs, FR_INT_ERR);
nsect += (DWORD)(ofs / SS(fs));
}
}
}
if (!_FS_READONLY && fp->fptr > fp->obj.objsize) {/* Set file change flag if the file size is extended */
fp->obj.objsize = fp->fptr;
fp->flag |= FA_MODIFIED;
}
if (fp->fptr % SS(fs) && nsect != fp->sect) {/* Fill sector cache if needed */
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA_DIRTY) {/* Write-back dirty sector cache */
if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
fp->flag &= (BYTE)~FA_DIRTY;
}
#endif
if (disk_read(fs->drv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);/* Fill sector cache */
#endif
fp->sect = nsect;
}
}
LEAVE_FF(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;
_FDID *obj;
DEF_NAMBUF
if (!dp) return FR_INVALID_OBJECT;
/* Get logical drive */
obj = &dp->obj;
res = find_volume(&path, &fs, 0);
if (res == FR_OK) {
obj->fs = fs;
INIT_NAMBUF(fs);
res = follow_path(dp, path);/* Follow the path to the directory */
if (res == FR_OK) {/* Follow completed */
if (!(dp->fn[NSFLAG] & NS_NONAME)) {/* It is not the origin directory itself */
if (obj->attr & AM_DIR) {/* This object is a sub-directory */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
obj->c_scl = obj->sclust;/* Save containing directory inforamation */
obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat;
obj->c_ofs = dp->blk_ofs;
obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus);/* Get object location and status */
obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;
} else
#endif
{
obj->sclust = ld_clust(fs, dp->dir);/* Get object location */
}
} else {/* This object is a file */
res = FR_NO_PATH;
}
}
if (res == FR_OK) {
obj->id = fs->id;
res = dir_sdi(dp, 0);/* Rewind directory */
#if _FS_LOCK != 0
if (res == FR_OK) {
if (obj->sclust) {
obj->lockid = inc_lock(dp, 0);/* Lock the sub directory */
if (!obj->lockid) res = FR_TOO_MANY_OPEN_FILES;
} else {
obj->lockid = 0;/* Root directory need not to be locked */
}
}
#endif
}
}
FREE_NAMBUF();
if (res == FR_NO_FILE) res = FR_NO_PATH;
}
if (res != FR_OK) obj->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;
FATFS *fs;
res = validate(&dp->obj, &fs);/* Check validity of the file object */
if (res == FR_OK) {
#if _FS_LOCK != 0
if (dp->obj.lockid) {/* Decrement sub-directory open counter */
res = dec_lock(dp->obj.lockid);
}
if (res == FR_OK)
#endif
{
dp->obj.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;
FATFS *fs;
DEF_NAMBUF
res = validate(&dp->obj, &fs);/* Check validity of the directory object */
if (res == FR_OK) {
if (!fno) {
res = dir_sdi(dp, 0);/* Rewind the directory object */
} else {
INIT_NAMBUF(fs);
res = dir_read(dp, 0);/* Read an item */
if (res == FR_NO_FILE) res = FR_OK;/* Ignore end of directory */
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) res = FR_OK;/* Ignore end of directory now */
}
FREE_NAMBUF();
}
}
LEAVE_FF(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 (pattern_matching(dp->pat, fno->fname, 0, 0)) break;/* Test for the file name */
#if _USE_LFN != 0 && _USE_FIND == 2
if (pattern_matching(dp->pat, fno->altname, 0, 0)) break;/* Test for alternative name if exist */
#endif
}
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;
DEF_NAMBUF
/* Get logical drive */
res = find_volume(&path, &dj.obj.fs, 0);
if (res == FR_OK) {
INIT_NAMBUF(dj.obj.fs);
res = follow_path(&dj, path);/* Follow the file path */
if (res == FR_OK) {/* Follow completed */
if (dj.fn[NSFLAG] & NS_NONAME) {/* It is origin directory */
res = FR_INVALID_NAME;
} else {/* Found an object */
if (fno) get_fileinfo(&dj, fno);
}
}
FREE_NAMBUF();
}
LEAVE_FF(dj.obj.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 nfree, clst, sect, stat;
UINT i;
BYTE *p;
_FDID obj;
/* Get logical drive */
res = find_volume(&path, &fs, 0);
if (res == FR_OK) {
*fatfs = fs;/* Return ptr to the fs object */
/* If free_clst is valid, return it without full cluster scan */
if (fs->free_clst <= fs->n_fatent - 2) {
*nclst = fs->free_clst;
} else {
/* Get number of free clusters */
nfree = 0;
if (fs->fs_type == FS_FAT12) {/* FAT12: Sector unalighed FAT entries */
clst = 2; obj.fs = fs;
do {
stat = get_fat(&obj, clst);
if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
if (stat == 1) { res = FR_INT_ERR; break; }
if (stat == 0) nfree++;
} while (++clst < fs->n_fatent);
} else {
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {/* exFAT: Scan bitmap table */
BYTE bm;
UINT b;
clst = fs->n_fatent - 2;
sect = fs->database;
i = 0;
do {
if (i == 0 && (res = move_window(fs, sect++)) != FR_OK) break;
for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) {
if (!(bm & 1)) nfree++;
bm >>= 1;
}
i = (i + 1) % SS(fs);
} while (clst);
} else
#endif
{/* FAT16/32: Sector alighed FAT entries */
clst = fs->n_fatent; sect = fs->fatbase;
i = 0; p = 0;
do {
if (i == 0) {
res = move_window(fs, sect++);
if (res != FR_OK) break;
p = fs->win;
i = SS(fs);
}
if (fs->fs_type == FS_FAT16) {
if (ld_word(p) == 0) nfree++;
p += 2; i -= 2;
} else {
if ((ld_dword(p) & 0x0FFFFFFF) == 0) nfree++;
p += 4; i -= 4;
}
} while (--clst);
}
}
*nclst = nfree;/* Return the free clusters */
fs->free_clst = nfree;/* Now free_clst is valid */
fs->fsi_flag |= 1;/* FSInfo is to be updated */
}
}
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Truncate File */
/*-----------------------------------------------------------------------*/
FRESULT f_truncate (
FIL* fp/* Pointer to the file object */
)
{
FRESULT res;
FATFS *fs;
DWORD ncl;
res = validate(&fp->obj, &fs);/* Check validity of the file object */
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);/* Check access mode */
if (fp->obj.objsize > fp->fptr) {
if (fp->fptr == 0) {/* When set file size to zero, remove entire cluster chain */
res = remove_chain(&fp->obj, fp->obj.sclust, 0);
fp->obj.sclust = 0;
} else {/* When truncate a part of the file, remove remaining clusters */
ncl = get_fat(&fp->obj, fp->clust);
res = FR_OK;
if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
if (ncl == 1) res = FR_INT_ERR;
if (res == FR_OK && ncl < fs->n_fatent) {
res = remove_chain(&fp->obj, ncl, fp->clust);
}
}
fp->obj.objsize = fp->fptr;/* Set file size to current R/W point */
fp->flag |= FA_MODIFIED;
#if !_FS_TINY
if (res == FR_OK && (fp->flag & FA_DIRTY)) {
if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) {
res = FR_DISK_ERR;
} else {
fp->flag &= (BYTE)~FA_DIRTY;
}
}
#endif
if (res != FR_OK) ABORT(fs, res);
}
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Delete a File/Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_unlink (
const TCHAR* path/* Pointer to the file or directory path */
)
{
FRESULT res;
DIR dj, sdj;
DWORD dclst = 0;
FATFS *fs;
#if _FS_EXFAT
_FDID obj;
#endif
DEF_NAMBUF
/* Get logical drive */
res = find_volume(&path, &fs, FA_WRITE);
dj.obj.fs = fs;
if (res == FR_OK) {
INIT_NAMBUF(fs);
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 != 0
if (res == FR_OK) res = chk_lock(&dj, 2);/* Check if it is an open object */
#endif
if (res == FR_OK) {/* The object is accessible */
if (dj.fn[NSFLAG] & NS_NONAME) {
res = FR_INVALID_NAME;/* Cannot remove the origin directory */
} else {
if (dj.obj.attr & AM_RDO) {
res = FR_DENIED;/* Cannot remove R/O object */
}
}
if (res == FR_OK) {
#if _FS_EXFAT
obj.fs = fs;
if (fs->fs_type == FS_EXFAT) {
obj.sclust = dclst = ld_dword(fs->dirbuf + XDIR_FstClus);
obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
} else
#endif
{
dclst = ld_clust(fs, dj.dir);
}
if (dj.obj.attr & AM_DIR) {/* Is it a sub-directory ? */
#if _FS_RPATH != 0
if (dclst == fs->cdir) { /* Is it the current directory? */
res = FR_DENIED;
} else
#endif
{
sdj.obj.fs = fs;/* Open the sub-directory */
sdj.obj.sclust = dclst;
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
sdj.obj.objsize = obj.objsize;
sdj.obj.stat = obj.stat;
}
#endif
res = dir_sdi(&sdj, 0);
if (res == FR_OK) {
res = dir_read(&sdj, 0);/* Read an item */
if (res == FR_OK) res = FR_DENIED;/* Not empty? */
if (res == FR_NO_FILE) res = FR_OK;/* Empty? */
}
}
}
}
if (res == FR_OK) {
res = dir_remove(&dj);/* Remove the directory entry */
if (res == FR_OK && dclst) {/* Remove the cluster chain if exist */
#if _FS_EXFAT
res = remove_chain(&obj, dclst, 0);
#else
res = remove_chain(&dj.obj, dclst, 0);
#endif
}
if (res == FR_OK) res = sync_fs(fs);
}
}
FREE_NAMBUF();
}
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Create a Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_mkdir (
const TCHAR* path/* Pointer to the directory path */
)
{
FRESULT res;
DIR dj;
FATFS *fs;
BYTE *dir;
UINT n;
DWORD dsc, dcl, pcl, tm;
DEF_NAMBUF
/* Get logical drive */
res = find_volume(&path, &fs, FA_WRITE);
dj.obj.fs = fs;
if (res == FR_OK) {
INIT_NAMBUF(fs);
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.obj, 0);/* Allocate a cluster for the new directory table */
dj.obj.objsize = (DWORD)fs->csize * SS(fs);
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) res = sync_window(fs);/* Flush FAT */
tm = GET_FATTIME();
if (res == FR_OK) {/* Initialize the new directory table */
dsc = clust2sect(fs, dcl);
dir = fs->win;
mem_set(dir, 0, SS(fs));
if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {
mem_set(dir + DIR_Name, ' ', 11);/* Create "." entry */
dir[DIR_Name] = '.';
dir[DIR_Attr] = AM_DIR;
st_dword(dir + DIR_ModTime, tm);
st_clust(fs, dir, dcl);
mem_cpy(dir + SZDIRE, dir, SZDIRE); /* Create ".." entry */
dir[SZDIRE + 1] = '.'; pcl = dj.obj.sclust;
if (fs->fs_type == FS_FAT32 && pcl == fs->dirbase) pcl = 0;
st_clust(fs, dir + SZDIRE, pcl);
}
for (n = fs->csize; n; n--) {/* Write dot entries and clear following sectors */
fs->winsect = dsc++;
fs->wflag = 1;
res = sync_window(fs);
if (res != FR_OK) break;
mem_set(dir, 0, SS(fs));
}
}
if (res == FR_OK) res = dir_register(&dj);/* Register the object to the directoy */
if (res == FR_OK) {
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {/* Initialize directory entry block */
st_dword(fs->dirbuf + XDIR_ModTime, tm);/* Created time */
st_dword(fs->dirbuf + XDIR_FstClus, dcl);/* Table start cluster */
st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)dj.obj.objsize);/* File size needs to be valid */
st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)dj.obj.objsize);
fs->dirbuf[XDIR_GenFlags] = 3;/* Initialize the object flag (contiguous) */
fs->dirbuf[XDIR_Attr] = AM_DIR;/* Attribute */
res = store_xdir(&dj);
} else
#endif
{
dir = dj.dir;
st_dword(dir + DIR_ModTime, tm);/* Created time */
st_clust(fs, dir, dcl);/* Table start cluster */
dir[DIR_Attr] = AM_DIR;/* Attribute */
fs->wflag = 1;
}
if (res == FR_OK) res = sync_fs(fs);
} else {
remove_chain(&dj.obj, dcl, 0);/* Could not register, remove cluster chain */
}
}
FREE_NAMBUF();
}
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Rename a File/Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_rename (
const TCHAR* path_old,/* Pointer to the object name to be renamed */
const TCHAR* path_new/* Pointer to the new name */
)
{
FRESULT res;
DIR djo, djn;
FATFS *fs;
BYTE buf[_FS_EXFAT ? SZDIRE * 2 : 24], *dir;
DWORD dw;
DEF_NAMBUF
get_ldnumber(&path_new);/* Ignore drive number of new name */
res = find_volume(&path_old, &fs, FA_WRITE);/* Get logical drive of the old object */
if (res == FR_OK) {
djo.obj.fs = fs;
INIT_NAMBUF(fs);
res = follow_path(&djo, path_old);/* Check old object */
if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME;/* Check validity of name */
#if _FS_LOCK != 0
if (res == FR_OK) res = chk_lock(&djo, 2);
#endif
if (res == FR_OK) {/* Object to be renamed is found */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {/* At exFAT */
BYTE nf, nn;
WORD nh;
mem_cpy(buf, fs->dirbuf, SZDIRE * 2);/* Save 85+C0 entry of old object */
mem_cpy(&djn, &djo, sizeof djo);
res = follow_path(&djn, path_new);/* Make sure if new object name is not in use */
if (res == FR_OK) {/* Is new name already in use by any other object? */
res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
}
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) {
nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName];
nh = ld_word(fs->dirbuf + XDIR_NameHash);
mem_cpy(fs->dirbuf, buf, SZDIRE * 2);
fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn;
st_word(fs->dirbuf + XDIR_NameHash, nh);
/* Start of critical section where any interruption can cause a cross-link */
res = store_xdir(&djn);
}
}
} else
#endif
{/* At FAT12/FAT16/FAT32 */
mem_cpy(buf, djo.dir + DIR_Attr, 21);/* Save information about the object except name */
mem_cpy(&djn, &djo, sizeof (DIR));/* Duplicate the directory object */
res = follow_path(&djn, path_new);/* Make sure if new object name is not in use */
if (res == FR_OK) {/* Is new name already in use by any other object? */
res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
}
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) {
dir = djn.dir;/* Copy information about object except name */
mem_cpy(dir + 13, buf + 2, 19);
dir[DIR_Attr] = buf[0] | AM_ARC;
fs->wflag = 1;
if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) {/* Update .. entry in the sub-directory if needed */
dw = clust2sect(fs, ld_clust(fs, dir));
if (!dw) {
res = FR_INT_ERR;
} else {
/* Start of critical section where any interruption can cause a cross-link */
res = move_window(fs, dw);
dir = fs->win + SZDIRE * 1;/* Ptr to .. entry */
if (res == FR_OK && dir[1] == '.') {
st_clust(fs, dir, djn.obj.sclust);
fs->wflag = 1;
}
}
}
}
}
}
if (res == FR_OK) {
res = dir_remove(&djo);/* Remove old entry */
if (res == FR_OK) {
res = sync_fs(fs);
}
}
/* End of critical section */
}
FREE_NAMBUF();
}
LEAVE_FF(fs, res);
}
#endif /* !_FS_READONLY */
#endif /* _FS_MINIMIZE == 0 */
#endif /* _FS_MINIMIZE <= 1 */
#endif /* _FS_MINIMIZE <= 2 */
#if _USE_CHMOD && !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* 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;
FATFS *fs;
DEF_NAMBUF
res = find_volume(&path, &fs, FA_WRITE);/* Get logical drive */
dj.obj.fs = fs;
if (res == FR_OK) {
INIT_NAMBUF(fs);
res = follow_path(&dj, path);/* Follow the file path */
if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME;/* Check object validity */
if (res == FR_OK) {
mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC;/* Valid attribute mask */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask);/* Apply attribute change */
res = store_xdir(&dj);
} else
#endif
{
dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask);/* Apply attribute change */
fs->wflag = 1;
}
if (res == FR_OK) res = sync_fs(fs);
}
FREE_NAMBUF();
}
LEAVE_FF(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;
FATFS *fs;
DEF_NAMBUF
res = find_volume(&path, &fs, FA_WRITE);/* Get logical drive */
dj.obj.fs = fs;
if (res == FR_OK) {
INIT_NAMBUF(fs);
res = follow_path(&dj, path);/* Follow the file path */
if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME;/* Check object validity */
if (res == FR_OK) {
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
res = store_xdir(&dj);
} else
#endif
{
st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
fs->wflag = 1;
}
if (res == FR_OK) res = sync_fs(fs);
}
FREE_NAMBUF();
}
LEAVE_FF(fs, res);
}
#endif/* _USE_CHMOD && !_FS_READONLY */
#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;
FATFS *fs;
UINT si, di;
#if _LFN_UNICODE || _FS_EXFAT
WCHAR w;
#endif
/* Get logical drive */
res = find_volume(&path, &fs, 0);
/* Get volume label */
if (res == FR_OK && label) {
dj.obj.fs = fs; dj.obj.sclust = 0;/* Open root directory */
res = dir_sdi(&dj, 0);
if (res == FR_OK) {
res = dir_read(&dj, 1);/* Find a volume label entry */
if (res == FR_OK) {
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
for (si = di = 0; si < dj.dir[XDIR_NumLabel]; si++) {/* Extract volume label from 83 entry */
w = ld_word(dj.dir + XDIR_Label + si * 2);
#if _LFN_UNICODE
label[di++] = w;
#else
w = ff_convert(w, 0);/* Unicode -> OEM */
if (w == 0) w = '?';/* Replace wrong character */
if (_DF1S && w >= 0x100) label[di++] = (char)(w >> 8);
label[di++] = (char)w;
#endif
}
label[di] = 0;
} else
#endif
{
si = di = 0;/* Extract volume label from AM_VOL entry with code comversion */
do {
#if _LFN_UNICODE
w = (si < 11) ? dj.dir[si++] : ' ';
if (IsDBCS1(w) && si < 11 && IsDBCS2(dj.dir[si])) {
w = w << 8 | dj.dir[si++];
}
label[di++] = ff_convert(w, 1);/* OEM -> Unicode */
#else
label[di++] = dj.dir[si++];
#endif
} while (di < 11);
do {/* Truncate trailing spaces */
label[di] = 0;
if (di == 0) break;
} while (label[--di] == ' ');
}
}
}
if (res == FR_NO_FILE) {/* No label entry and return nul string */
label[0] = 0;
res = FR_OK;
}
}
/* Get volume serial number */
if (res == FR_OK && vsn) {
res = move_window(fs, fs->volbase);
if (res == FR_OK) {
switch (fs->fs_type) {
case FS_EXFAT: di = BPB_VolIDEx; break;
case FS_FAT32: di = BS_VolID32; break;
default: di = BS_VolID;
}
*vsn = ld_dword(fs->win + di);
}
}
LEAVE_FF(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;
FATFS *fs;
BYTE dirvn[22];
UINT i, j, slen;
WCHAR w;
static const char badchr[] = "\"*+,.:;<=>\?[]|\x7F";
/* Get logical drive */
res = find_volume(&label, &fs, FA_WRITE);
if (res != FR_OK) LEAVE_FF(fs, res);
dj.obj.fs = fs;
/* Get length of given volume label */
for (slen = 0; (UINT)label[slen] >= ' '; slen++) ;/* Get name length */
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {/* On the exFAT volume */
for (i = j = 0; i < slen; ) {/* Create volume label in directory form */
w = label[i++];
#if !_LFN_UNICODE
if (IsDBCS1(w)) {
w = (i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
}
w = ff_convert(w, 1);
#endif
if (w == 0 || chk_chr(badchr, w) || j == 22) {/* Check validity check validity of the volume label */
LEAVE_FF(fs, FR_INVALID_NAME);
}
st_word(dirvn + j, w); j += 2;
}
slen = j;
} else
#endif
{/* On the FAT12/16/32 volume */
for ( ; slen && label[slen - 1] == ' '; slen--) ;/* Remove trailing spaces */
if (slen) {/* Is there a volume label to be set? */
dirvn[0] = 0; i = j = 0;/* Create volume label in directory form */
do {
#if _LFN_UNICODE
w = ff_convert(ff_wtoupper(label[i++]), 0);
#else
w = (BYTE)label[i++];
if (IsDBCS1(w)) {
w = (j < 10 && i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
}
#if _USE_LFN != 0
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 == 0 || chk_chr(badchr, w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) {/* Reject invalid characters for volume label */
LEAVE_FF(fs, FR_INVALID_NAME);
}
if (w >= 0x100) dirvn[j++] = (BYTE)(w >> 8);
dirvn[j++] = (BYTE)w;
} while (i < slen);
while (j < 11) dirvn[j++] = ' ';/* Fill remaining name field */
if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME);/* Reject illegal name (heading DDEM) */
}
}
/* Set volume label */
dj.obj.sclust = 0;/* Open root directory */
res = dir_sdi(&dj, 0);
if (res == FR_OK) {
res = dir_read(&dj, 1);/* Get volume label entry */
if (res == FR_OK) {
if (_FS_EXFAT && fs->fs_type == FS_EXFAT) {
dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2);/* Change the volume label */
mem_cpy(dj.dir + XDIR_Label, dirvn, slen);
} else {
if (slen) {
mem_cpy(dj.dir, dirvn, 11);/* Change the volume label */
} else {
dj.dir[DIR_Name] = DDEM;/* Remove the volume label */
}
}
fs->wflag = 1;
res = sync_fs(fs);
} else {/* No volume label entry is found or error */
if (res == FR_NO_FILE) {
res = FR_OK;
if (slen) {/* Create a volume label entry */
res = dir_alloc(&dj, 1);/* Allocate an entry */
if (res == FR_OK) {
mem_set(dj.dir, 0, SZDIRE);/* Clear the entry */
if (_FS_EXFAT && fs->fs_type == FS_EXFAT) {
dj.dir[XDIR_Type] = 0x83;/* Create 83 entry */
dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2);
mem_cpy(dj.dir + XDIR_Label, dirvn, slen);
} else {
dj.dir[DIR_Attr] = AM_VOL;/* Create volume label entry */
mem_cpy(dj.dir, dirvn, 11);
}
fs->wflag = 1;
res = sync_fs(fs);
}
}
}
}
}
LEAVE_FF(fs, res);
}
#endif /* !_FS_READONLY */
#endif /* _USE_LABEL */
#if _USE_EXPAND && !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Allocate a Contiguous Blocks to the File */
/*-----------------------------------------------------------------------*/
FRESULT f_expand (
FIL* fp,/* Pointer to the file object */
FSIZE_t fsz,/* File size to be expanded to */
BYTE opt/* Operation mode 0:Find and prepare or 1:Find and allocate */
)
{
FRESULT res;
FATFS *fs;
DWORD n, clst, stcl, scl, ncl, tcl, lclst;
res = validate(&fp->obj, &fs);/* Check validity of the file object */
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);
#if _FS_EXFAT
if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED);/* Check if in size limit */
#endif
n = (DWORD)fs->csize * SS(fs);/* Cluster size */
tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0);/* Number of clusters required */
stcl = fs->last_clst; lclst = 0;
if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2;
#if _FS_EXFAT
if (fs->fs_type == FS_EXFAT) {
scl = find_bitmap(fs, stcl, tcl);/* Find a contiguous cluster block */
if (scl == 0) res = FR_DENIED;/* No contiguous cluster block was found */
if (scl == 0xFFFFFFFF) res = FR_DISK_ERR;
if (res == FR_OK) {
if (opt) {
res = change_bitmap(fs, scl, tcl, 1);/* Mark the cluster block 'in use' */
lclst = scl + tcl - 1;
} else {
lclst = scl - 1;
}
}
} else
#endif
{
scl = clst = stcl; ncl = 0;
for (;;) {/* Find a contiguous cluster block */
n = get_fat(&fp->obj, clst);
if (++clst >= fs->n_fatent) clst = 2;
if (n == 1) { res = FR_INT_ERR; break; }
if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
if (n == 0) {/* Is it a free cluster? */
if (++ncl == tcl) break;/* Break if a contiguous cluster block is found */
} else {
scl = clst; ncl = 0;/* Not a free cluster */
}
if (clst == stcl) { res = FR_DENIED; break; }/* No contiguous cluster? */
}
if (res == FR_OK) {
if (opt) {
for (clst = scl, n = tcl; n; clst++, n--) {/* Create a cluster chain on the FAT */
res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1);
if (res != FR_OK) break;
lclst = clst;
}
} else {
lclst = scl - 1;
}
}
}
if (res == FR_OK) {
fs->last_clst = lclst;/* Set suggested start cluster to start next */
if (opt) {
fp->obj.sclust = scl;/* Update object allocation information */
fp->obj.objsize = fsz;
if (_FS_EXFAT) fp->obj.stat = 2;/* Set status 'contiguous chain' */
fp->flag |= FA_MODIFIED;
if (fs->free_clst < fs->n_fatent - 2) {/* Update FSINFO */
fs->free_clst -= tcl;
fs->fsi_flag |= 1;
}
}
}
LEAVE_FF(fs, res);
}
#endif /* _USE_EXPAND && !_FS_READONLY */
#if _USE_FORWARD
/*-----------------------------------------------------------------------*/
/* Forward data to the stream directly */
/*-----------------------------------------------------------------------*/
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;
FATFS *fs;
DWORD clst, sect;
FSIZE_t remain;
UINT rcnt, csect;
BYTE *dbuf;
*bf = 0;/* Clear transfer byte counter */
res = validate(&fp->obj, &fs);/* Check validity of the file object */
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED);/* Check access mode */
remain = fp->obj.objsize - 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 goes busy */
fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1));/* Sector offset in the cluster */
if (fp->fptr % SS(fs) == 0) {/* On the sector boundary? */
if (csect == 0) {/* On the cluster boundary? */
clst = (fp->fptr == 0) ?/* On the top of the file? */
fp->obj.sclust : get_fat(&fp->obj, fp->clust);
if (clst <= 1) ABORT(fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
fp->clust = clst;/* Update current cluster */
}
}
sect = clust2sect(fs, fp->clust);/* Get current data sector */
if (!sect) ABORT(fs, FR_INT_ERR);
sect += csect;
#if _FS_TINY
if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR);/* Move sector window to the file data */
dbuf = fs->win;
#else
if (fp->sect != sect) {/* Fill sector cache with file data */
#if !_FS_READONLY
if (fp->flag & FA_DIRTY) {/* Write-back dirty sector cache */
if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
fp->flag &= (BYTE)~FA_DIRTY;
}
#endif
if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
}
dbuf = fp->buf;
#endif
fp->sect = sect;
rcnt = SS(fs) - (UINT)fp->fptr % SS(fs);/* Number of bytes left in the sector */
if (rcnt > btf) rcnt = btf;/* Clip it by btr if needed */
rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt);/* Forward the file data */
if (!rcnt) ABORT(fs, FR_INT_ERR);
}
LEAVE_FF(fs, FR_OK);
}
#endif /* _USE_FORWARD */
#if _USE_MKFS && !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Create FAT file system on the logical drive */
/*-----------------------------------------------------------------------*/
FRESULT f_mkfs (
const TCHAR* path,/* Logical drive number */
BYTE opt,/* Format option */
DWORD au,/* Size of allocation unit [byte] */
void* work,/* Pointer to working buffer */
UINT len/* Size of working buffer */
)
{
const UINT n_fats = 1;/* Number of FATs for FAT12/16/32 volume (1 or 2) */
const UINT n_rootdir = 512;/* Number of root directory entries for FAT12/16 volume */
static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0};/* Cluster size boundary for FAT12/16 volume (4Ks unit) */
static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0};/* Cluster size boundary for FAT32 volume (128Ks unit) */
BYTE fmt, sys, *buf, *pte, pdrv, part;
WORD ss;
DWORD szb_buf, sz_buf, sz_blk, n_clst, pau, sect, nsect, n;
DWORD b_vol, b_fat, b_data;/* Base LBA for volume, fat, data */
DWORD sz_vol, sz_rsv, sz_fat, sz_dir;/* Size for volume, fat, dir, data */
UINT i;
int vol;
DSTATUS stat;
#if _USE_TRIM || _FS_EXFAT
DWORD tbl[3];
#endif
/* Check mounted drive and clear work area */
vol = get_ldnumber(&path);/* Get target logical drive */
if (vol < 0) return FR_INVALID_DRIVE;
if (FatFs[vol]) FatFs[vol]->fs_type = 0;/* Clear mounted volume */
pdrv = LD2PD(vol);/* Physical drive */
part = LD2PT(vol);/* Partition (0:create as new, 1-4:get from partition table) */
/* Check physical drive status */
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_BLOCK_SIZE, &sz_blk) != RES_OK || !sz_blk || sz_blk > 32768 || (sz_blk & (sz_blk - 1))) sz_blk = 1;/* Erase block to align data area */
#if _MAX_SS != _MIN_SS/* Get sector size of the medium */
if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;
if (ss > _MAX_SS || ss < _MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
#else
ss = _MAX_SS;
#endif
if ((au != 0 && au < ss) || au > 0x1000000 || (au & (au - 1))) return FR_INVALID_PARAMETER;/* Check if au is valid */
au /= ss;/* Cluster size in unit of sector */
/* Get working buffer */
buf = (BYTE*)work;/* Working buffer */
sz_buf = len / ss;/* Size of working buffer (sector) */
szb_buf = sz_buf * ss;/* Size of working buffer (byte) */
if (!szb_buf) return FR_MKFS_ABORTED;
/* Determine where the volume to be located (b_vol, sz_vol) */
if (_MULTI_PARTITION && part != 0) {
/* Get partition information from partition table in the MBR */
if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;/* Load MBR */
if (ld_word(buf + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;/* Check if MBR is valid */
pte = buf + (MBR_Table + (part - 1) * SZ_PTE);
if (!pte[PTE_System]) return FR_MKFS_ABORTED;/* No partition? */
b_vol = ld_dword(pte + PTE_StLba);/* Get volume start sector */
sz_vol = ld_dword(pte + PTE_SizLba);/* Get volume size */
} else {
/* Create a single-partition in this function */
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) return FR_DISK_ERR;
b_vol = (opt & FM_SFD) ? 0 : 63;/* Volume start sector */
if (sz_vol < b_vol) return FR_MKFS_ABORTED;
sz_vol -= b_vol;/* Volume size */
}
if (sz_vol < 128) return FR_MKFS_ABORTED;/* Check if volume size is >=128s */
/* Pre-determine the FAT type */
do {
if (_FS_EXFAT && (opt & FM_EXFAT)) {/* exFAT possible? */
if ((opt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || au > 128) {/* exFAT only, vol >= 64Ms or au > 128s ? */
fmt = FS_EXFAT; break;
}
}
if (au > 128) return FR_INVALID_PARAMETER;/* Too large au for FAT/FAT32 */
if (opt & FM_FAT32) {/* FAT32 possible? */
if ((opt & FM_ANY) == FM_FAT32 || !(opt & FM_FAT)) {/* FAT32 only or no-FAT? */
fmt = FS_FAT32; break;
}
}
if (!(opt & FM_FAT)) return FR_INVALID_PARAMETER;/* no-FAT? */
fmt = FS_FAT16;
} while (0);
#if _FS_EXFAT
if (fmt == FS_EXFAT) {/* Create an exFAT volume */
DWORD szb_bit, szb_case, sum, nb, cl;
WCHAR ch, si;
UINT j, st;
BYTE b;
if (sz_vol < 0x1000) return FR_MKFS_ABORTED;/* Too small volume? */
#if _USE_TRIM
tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1;/* Inform the device the volume area can be erased */
disk_ioctl(pdrv, CTRL_TRIM, tbl);
#endif
/* Determine FAT location, data location and number of clusters */
if (!au) {/* au auto-selection */
au = 8;
if (sz_vol >= 0x80000) au = 64;/* >= 512Ks */
if (sz_vol >= 0x4000000) au = 256;/* >= 64Ms */
}
b_fat = b_vol + 32;/* FAT start at offset 32 */
sz_fat = ((sz_vol / au + 2) * 4 + ss - 1) / ss;/* Number of FAT sectors */
b_data = (b_fat + sz_fat + sz_blk - 1) & ~(sz_blk - 1);/* Align data area to the erase block boundary */
if (b_data >= sz_vol / 2) return FR_MKFS_ABORTED;/* Too small volume? */
n_clst = (sz_vol - (b_data - b_vol)) / au;/* Number of clusters */
if (n_clst <16) return FR_MKFS_ABORTED;/* Too few clusters? */
if (n_clst > MAX_EXFAT) return FR_MKFS_ABORTED;/* Too many clusters? */
szb_bit = (n_clst + 7) / 8;/* Size of allocation bitmap */
tbl[0] = (szb_bit + au * ss - 1) / (au * ss);/* Number of allocation bitmap clusters */
/* Create a compressed up-case table */
sect = b_data + au * tbl[0];/* Table start sector */
sum = 0;/* Table checksum to be stored in the 82 entry */
st = si = i = j = szb_case = 0;
do {
switch (st) {
case 0:
ch = ff_wtoupper(si);/* Get an up-case char */
if (ch != si) {
si++; break;/* Store the up-case char if exist */
}
for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ;/* Get run length of no-case block */
if (j >= 128) {
ch = 0xFFFF; st = 2; break;/* Compress the no-case block if run is >= 128 */
}
st = 1;/* Do not compress short run */
/* continue */
case 1:
ch = si++;/* Fill the short run */
if (--j == 0) st = 0;
break;
default:
ch = (WCHAR)j; si += j;/* Number of chars to skip */
st = 0;
}
sum = xsum32(buf[i + 0] = (BYTE)ch, sum);/* Put it into the write buffer */
sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum);
i += 2; szb_case += 2;
if (!si || i == szb_buf) {/* Write buffered data when buffer full or end of process */
n = (i + ss - 1) / ss;
if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
sect += n; i = 0;
}
} while (si);
tbl[1] = (szb_case + au * ss - 1) / (au * ss);/* Number of up-case table clusters */
tbl[2] = 1;/* Number of root dir clusters */
/* Initialize the allocation bitmap */
sect = b_data; nsect = (szb_bit + ss - 1) / ss;/* Start of bitmap and number of sectors */
nb = tbl[0] + tbl[1] + tbl[2];/* Number of clusters in-use by system */
do {
mem_set(buf, 0, szb_buf);
for (i = 0; nb >= 8 && i < szb_buf; buf[i++] = 0xFF, nb -= 8) ;
for (b = 1; nb && i < szb_buf; buf[i] |= b, b <<= 1, nb--) ;
n = (nsect > sz_buf) ? sz_buf : nsect;/* Write the buffered data */
if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
sect += n; nsect -= n;
} while (nsect);
/* Initialize the FAT */
sect = b_fat; nsect = sz_fat;/* Start of FAT and number of FAT sectors */
j = nb = cl = 0;
do {
mem_set(buf, 0, szb_buf); i = 0;/* Clear work area and reset write index */
if (cl == 0) {/* Set entry 0 and 1 */
st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++;
st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++;
}
do {/* Create chains of bitmap, up-case and root dir */
while (nb && i < szb_buf) {/* Create a chain */
st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF);
i += 4; cl++; nb--;
}
if (!nb && j < 3) nb = tbl[j++];/* Next chain */
} while (nb && i < szb_buf);
n = (nsect > sz_buf) ? sz_buf : nsect;/* Write the buffered data */
if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
sect += n; nsect -= n;
} while (nsect);
/* Initialize the root directory */
mem_set(buf, 0, szb_buf);
buf[SZDIRE * 0 + 0] = 0x83;/* 83 entry (volume label) */
buf[SZDIRE * 1 + 0] = 0x81;/* 81 entry (allocation bitmap) */
st_dword(buf + SZDIRE * 1 + 20, 2);
st_dword(buf + SZDIRE * 1 + 24, szb_bit);
buf[SZDIRE * 2 + 0] = 0x82;/* 82 entry (up-case table) */
st_dword(buf + SZDIRE * 2 + 4, sum);
st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]);
st_dword(buf + SZDIRE * 2 + 24, szb_case);
sect = b_data + au * (tbl[0] + tbl[1]);nsect = au;/* Start of the root directory and number of sectors */
do {/* Fill root directory sectors */
n = (nsect > sz_buf) ? sz_buf : nsect;
if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
mem_set(buf, 0, ss);
sect += n; nsect -= n;
} while (nsect);
/* Create two set of the exFAT VBR blocks */
sect = b_vol;
for (n = 0; n < 2; n++) {
/* Main record (+0) */
mem_set(buf, 0, ss);
mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11);/* Boot jump code (x86), OEM name */
st_dword(buf + BPB_VolOfsEx, b_vol);/* Volume offset in the physical drive [sector] */
st_dword(buf + BPB_TotSecEx, sz_vol);/* Volume size [sector] */
st_dword(buf + BPB_FatOfsEx, b_fat - b_vol);/* FAT offset [sector] */
st_dword(buf + BPB_FatSzEx, sz_fat);/* FAT size [sector] */
st_dword(buf + BPB_DataOfsEx, b_data - b_vol);/* Data offset [sector] */
st_dword(buf + BPB_NumClusEx, n_clst);/* Number of clusters */
st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]);/* Root dir cluster # */
st_dword(buf + BPB_VolIDEx, GET_FATTIME());/* VSN */
st_word(buf + BPB_FSVerEx, 0x100);/* File system version (1.00) */
for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ;/* Log2 of sector size [byte] */
for (buf[BPB_SecPerClusEx] = 0, i = au; i >>= 1; buf[BPB_SecPerClusEx]++) ;/* Log2 of cluster size [sector] */
buf[BPB_NumFATsEx] = 1;/* Number of FATs */
buf[BPB_DrvNumEx] = 0x80;/* Drive number (for int13) */
st_word(buf + BS_BootCodeEx, 0xFEEB);/* Boot code (x86) */
st_word(buf + BS_55AA, 0xAA55);/* Signature (placed here regardless of sector size) */
for (i = sum = 0; i < ss; i++) {/* VBR checksum */
if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum);
}
if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
/* Extended bootstrap record (+1..+8) */
mem_set(buf, 0, ss);
st_word(buf + ss - 2, 0xAA55);/* Signature (placed at end of sector) */
for (j = 1; j < 9; j++) {
for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ;/* VBR checksum */
if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
}
/* OEM/Reserved record (+9..+10) */
mem_set(buf, 0, ss);
for ( ; j < 11; j++) {
for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ;/* VBR checksum */
if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
}
/* Sum record (+11) */
for (i = 0; i < ss; i += 4) st_dword(buf + i, sum);/* Fill with checksum value */
if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
}
} else
#endif/* _FS_EXFAT */
{/* Create an FAT12/16/32 volume */
do {
pau = au;
/* Pre-determine number of clusters and FAT sub-type */
if (fmt == FS_FAT32) {/* FAT32 volume */
if (!pau) {/* au auto-selection */
n = sz_vol / 0x20000;/* Volume size in unit of 128KS */
for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ;/* Get from table */
}
n_clst = sz_vol / pau;/* Number of clusters */
sz_fat = (n_clst * 4 + 8 + ss - 1) / ss;/* FAT size [sector] */
sz_rsv = 32;/* Number of reserved sectors */
sz_dir = 0;/* No static directory */
if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) return FR_MKFS_ABORTED;
} else {/* FAT12/16 volume */
if (!pau) {/* au auto-selection */
n = sz_vol / 0x1000;/* Volume size in unit of 4KS */
for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ;/* Get from table */
}
n_clst = sz_vol / pau;
if (n_clst > MAX_FAT12) {
n = n_clst * 2 + 4;/* FAT size [byte] */
} else {
fmt = FS_FAT12;
n = (n_clst * 3 + 1) / 2 + 3;/* FAT size [byte] */
}
sz_fat = (n + ss - 1) / ss;/* FAT size [sector] */
sz_rsv = 1;/* Number of reserved sectors */
sz_dir = (DWORD)n_rootdir * SZDIRE / ss;/* Rootdir size [sector] */
}
b_fat = b_vol + sz_rsv;/* FAT base */
b_data = b_fat + sz_fat * n_fats + sz_dir;/* Data base */
/* Align data base to erase block boundary (for flash memory media) */
n = ((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data;/* Next nearest erase block from current data base */
if (fmt == FS_FAT32) {/* FAT32: Move FAT base */
sz_rsv += n; b_fat += n;
} else {/* FAT12/16: Expand FAT size */
sz_fat += n / n_fats;
}
/* Determine number of clusters and final check of validity of the FAT sub-type */
if (sz_vol < b_data + pau * 16 - b_vol) return FR_MKFS_ABORTED;/* Too small volume */
n_clst = (sz_vol - sz_rsv - sz_fat * n_fats - sz_dir) / pau;
if (fmt == FS_FAT32) {
if (n_clst <= MAX_FAT16) {/* Too few clusters for FAT32 */
if (!au && (au = pau / 2) != 0) continue;/* Adjust cluster size and retry */
return FR_MKFS_ABORTED;
}
}
if (fmt == FS_FAT16) {
if (n_clst > MAX_FAT16) {/* Too many clusters for FAT16 */
if (!au && (pau * 2) <= 64) {
au = pau * 2; continue;/* Adjust cluster size and retry */
}
if ((opt & FM_FAT32)) {
fmt = FS_FAT32; continue;/* Switch type to FAT32 and retry */
}
if (!au && (au = pau * 2) <= 128) continue;/* Adjust cluster size and retry */
return FR_MKFS_ABORTED;
}
if (n_clst <= MAX_FAT12) {/* Too few clusters for FAT16 */
if (!au && (au = pau * 2) <= 128) continue;/* Adjust cluster size and retry */
return FR_MKFS_ABORTED;
}
}
if (fmt == FS_FAT12 && n_clst > MAX_FAT12) return FR_MKFS_ABORTED;/* Too many clusters for FAT12 */
/* Ok, it is the valid cluster configuration */
break;
} while (1);
#if _USE_TRIM
tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1;/* Inform the device the volume area can be erased */
disk_ioctl(pdrv, CTRL_TRIM, tbl);
#endif
/* Create FAT VBR */
mem_set(buf, 0, ss);
mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */
st_word(buf + BPB_BytsPerSec, ss);/* Sector size [byte] */
buf[BPB_SecPerClus] = (BYTE)pau;/* Cluster size [sector] */
st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv);/* Size of reserved area */
buf[BPB_NumFATs] = (BYTE)n_fats;/* Number of FATs */
st_word(buf + BPB_RootEntCnt, (WORD)((fmt == FS_FAT32) ? 0 : n_rootdir));/* Number of root directory entries */
if (sz_vol < 0x10000) {
st_word(buf + BPB_TotSec16, (WORD)sz_vol);/* Volume size in 16-bit LBA */
} else {
st_dword(buf + BPB_TotSec32, sz_vol);/* Volume size in 32-bit LBA */
}
buf[BPB_Media] = 0xF8;/* Media descriptor byte */
st_word(buf + BPB_SecPerTrk, 63);/* Number of sectors per track (for int13) */
st_word(buf + BPB_NumHeads, 255);/* Number of heads (for int13) */
st_dword(buf + BPB_HiddSec, b_vol);/* Volume offset in the physical drive [sector] */
if (fmt == FS_FAT32) {
st_dword(buf + BS_VolID32, GET_FATTIME());/* VSN */
st_dword(buf + BPB_FATSz32, sz_fat);/* FAT size [sector] */
st_dword(buf + BPB_RootClus32, 2);/* Root directory cluster # (2) */
st_word(buf + BPB_FSInfo32, 1);/* Offset of FSINFO sector (VBR + 1) */
st_word(buf + BPB_BkBootSec32, 6);/* Offset of backup VBR (VBR + 6) */
buf[BS_DrvNum32] = 0x80;/* Drive number (for int13) */
buf[BS_BootSig32] = 0x29;/* Extended boot signature */
mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19);/* Volume label, FAT signature */
} else {
st_dword(buf + BS_VolID, GET_FATTIME());/* VSN */
st_word(buf + BPB_FATSz16, (WORD)sz_fat);/* FAT size [sector] */
buf[BS_DrvNum] = 0x80;/* Drive number (for int13) */
buf[BS_BootSig] = 0x29;/* Extended boot signature */
mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19);/* Volume label, FAT signature */
}
st_word(buf + BS_55AA, 0xAA55);/* Signature (offset is fixed here regardless of sector size) */
if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) return FR_DISK_ERR;/* Write it to the VBR sector */
/* Create FSINFO record if needed */
if (fmt == FS_FAT32) {
disk_write(pdrv, buf, b_vol + 6, 1);/* Write backup VBR (VBR + 6) */
mem_set(buf, 0, ss);
st_dword(buf + FSI_LeadSig, 0x41615252);
st_dword(buf + FSI_StrucSig, 0x61417272);
st_dword(buf + FSI_Free_Count, n_clst - 1);/* Number of free clusters */
st_dword(buf + FSI_Nxt_Free, 2);/* Last allocated cluster# */
st_word(buf + BS_55AA, 0xAA55);
disk_write(pdrv, buf, b_vol + 7, 1);/* Write backup FSINFO (VBR + 7) */
disk_write(pdrv, buf, b_vol + 1, 1);/* Write original FSINFO (VBR + 1) */
}
/* Initialize FAT area */
mem_set(buf, 0, (UINT)szb_buf);
sect = b_fat;/* FAT start sector */
for (i = 0; i < n_fats; i++) {/* Initialize FATs each */
if (fmt == FS_FAT32) {
st_dword(buf + 0, 0xFFFFFFF8);/* Entry 0 */
st_dword(buf + 4, 0xFFFFFFFF);/* Entry 1 */
st_dword(buf + 8, 0x0FFFFFFF);/* Entry 2 (root directory) */
} else {
st_dword(buf + 0, (fmt == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8);/* Entry 0 and 1 */
}
nsect = sz_fat;/* Number of FAT sectors */
do {/* Fill FAT sectors */
n = (nsect > sz_buf) ? sz_buf : nsect;
if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR;
mem_set(buf, 0, ss);
sect += n; nsect -= n;
} while (nsect);
}
/* Initialize root directory (fill with zero) */
nsect = (fmt == FS_FAT32) ? pau : sz_dir;/* Number of root directory sectors */
do {
n = (nsect > sz_buf) ? sz_buf : nsect;
if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR;
sect += n; nsect -= n;
} while (nsect);
}
/* Determine system ID in the partition table */
if (_FS_EXFAT && fmt == FS_EXFAT) {
sys = 0x07;/* HPFS/NTFS/exFAT */
} else {
if (fmt == FS_FAT32) {
sys = 0x0C;/* FAT32X */
} else {
if (sz_vol >= 0x10000) {
sys = 0x06;/* FAT12/16 (>=64KS) */
} else {
sys = (fmt == FS_FAT16) ? 0x04 : 0x01;/* FAT16 (<64KS) : FAT12 (<64KS) */
}
}
}
if (_MULTI_PARTITION && part != 0) {
/* Update system ID in the partition table */
if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;/* Read the MBR */
buf[MBR_Table + (part - 1) * SZ_PTE + PTE_System] = sys;/* Set system type */
if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;/* Write it back to the MBR */
} else {
if (!(opt & FM_SFD)) {
/* Create partition table in FDISK format */
mem_set(buf, 0, ss);
st_word(buf + BS_55AA, 0xAA55);/* MBR signature */
pte = buf + MBR_Table;/* Create partition table for single partition in the drive */
pte[PTE_Boot] = 0;/* Boot indicator */
pte[PTE_StHead] = 1;/* Start head */
pte[PTE_StSec] = 1;/* Start sector */
pte[PTE_StCyl] = 0;/* Start cylinder */
pte[PTE_System] = sys;/* System type */
n = (b_vol + sz_vol) / (63 * 255);/* (End CHS is incorrect) */
pte[PTE_EdHead] = 254;/* End head */
pte[PTE_EdSec] = (BYTE)(n >> 2 | 63);/* End sector */
pte[PTE_EdCyl] = (BYTE)n;/* End cylinder */
st_dword(pte + PTE_StLba, b_vol);/* Start offset in LBA */
st_dword(pte + PTE_SizLba, sz_vol);/* Size in sectors */
if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;/* Write it to the MBR */
}
}
if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) return FR_DISK_ERR;
return FR_OK;
}
#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 the CHS without any care 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 _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
/*-----------------------------------------------------------------------*/
/* Put a character to the file */
/*-----------------------------------------------------------------------*/
typedef struct {
FIL *fp;/* Ptr to the writing file */
int idx, nchr;/* Write index of buf[] (-1:error), number of chars written */
BYTE buf[64];/* Write buffer */
} putbuff;
static
void putc_bfd (/* Buffered write with code conversion */
putbuff* pb,
TCHAR c
)
{
UINT bw;
int i;
if (_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */
putc_bfd(pb, '\r');
}
i = pb->idx;/* Write index of pb->buf[] */
if (i < 0) return;
#if _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++;
}
static
int putc_flush (/* Flush left characters in the buffer */
putbuff* pb
)
{
UINT nw;
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;
}
static
void putc_init (/* Initialize write buffer */
putbuff* pb,
FIL* fp
)
{
pb->fp = fp;
pb->nchr = pb->idx = 0;
}
int f_putc (
TCHAR c,/* A character to be output */
FIL* fp/* Pointer to the file object */
)
{
putbuff pb;
putc_init(&pb, fp);
putc_bfd(&pb, c);/* Put the character */
return putc_flush(&pb);
}
/*-----------------------------------------------------------------------*/
/* 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;
putc_init(&pb, fp);
while (*str) putc_bfd(&pb, *str++);/* Put the string */
return putc_flush(&pb);
}
/*-----------------------------------------------------------------------*/
/* 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;
putbuff pb;
BYTE f, r;
UINT i, j, w;
DWORD v;
TCHAR c, d, str[32], *p;
putc_init(&pb, fp);
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;
str[i++] = d + '0';
} while (v && i < sizeof str / sizeof str[0]);
if (f & 8) str[i++] = '-';
j = i; d = (f & 1) ? '0' : ' ';
while (!(f & 2) && j++ < w) putc_bfd(&pb, d);
do putc_bfd(&pb, str[--i]); while (i);
while (j++ < w) putc_bfd(&pb, d);
}
va_end(arp);
return putc_flush(&pb);
}
#endif /* !_FS_READONLY */
#endif /* _USE_STRFUNC */
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