#define ADK_INTERNAL | |
/*----------------------------------------------------------------------------/ | |
/ FatFs - FAT file system module R0.08b (C)ChaN, 2011 | |
/-----------------------------------------------------------------------------/ | |
/ FatFs module is a generic FAT file system module for small embedded systems. | |
/ This is a free software that opened for education, research and commercial | |
/ developments under license policy of following terms. | |
/ | |
/ Copyright (C) 2011, ChaN, all right reserved. | |
/ | |
/ * The FatFs module is a free software and there is NO WARRANTY. | |
/ * No restriction on use. You can use, modify and redistribute it for | |
/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. | |
/ * Redistributions of source code must retain the above copyright notice. | |
/ | |
/-----------------------------------------------------------------------------/ | |
/ Feb 26,'06 R0.00 Prototype. | |
/ | |
/ Apr 29,'06 R0.01 First stable version. | |
/ | |
/ Jun 01,'06 R0.02 Added FAT12 support. | |
/ Removed unbuffered mode. | |
/ Fixed a problem on small (<32M) partition. | |
/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM). | |
/ | |
/ Sep 22,'06 R0.03 Added f_rename(). | |
/ Changed option _FS_MINIMUM to _FS_MINIMIZE. | |
/ Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast. | |
/ Fixed f_mkdir() creates incorrect directory on FAT32. | |
/ | |
/ Feb 04,'07 R0.04 Supported multiple drive system. | |
/ Changed some interfaces for multiple drive system. | |
/ Changed f_mountdrv() to f_mount(). | |
/ Added f_mkfs(). | |
/ Apr 01,'07 R0.04a Supported multiple partitions on a physical drive. | |
/ Added a capability of extending file size to f_lseek(). | |
/ Added minimization level 3. | |
/ Fixed an endian sensitive code in f_mkfs(). | |
/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG. | |
/ Added FSInfo support. | |
/ Fixed DBCS name can result FR_INVALID_NAME. | |
/ Fixed short seek (<= csize) collapses the file object. | |
/ | |
/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs(). | |
/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo. | |
/ Fixed f_mkdir() on FAT32 creates incorrect directory. | |
/ Feb 03,'08 R0.05a Added f_truncate() and f_utime(). | |
/ Fixed off by one error at FAT sub-type determination. | |
/ Fixed btr in f_read() can be mistruncated. | |
/ Fixed cached sector is not flushed when create and close without write. | |
/ | |
/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets(). | |
/ Improved performance of f_lseek() on moving to the same or following cluster. | |
/ | |
/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY) | |
/ Added long file name feature. | |
/ Added multiple code page feature. | |
/ Added re-entrancy for multitask operation. | |
/ Added auto cluster size selection to f_mkfs(). | |
/ Added rewind option to f_readdir(). | |
/ Changed result code of critical errors. | |
/ Renamed string functions to avoid name collision. | |
/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg. | |
/ Added multiple sector size feature. | |
/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error. | |
/ Fixed wrong cache control in f_lseek(). | |
/ Added relative path feature. | |
/ Added f_chdir() and f_chdrive(). | |
/ Added proper case conversion to extended char. | |
/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h. | |
/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH. | |
/ Fixed name matching error on the 13 char boundary. | |
/ Added a configuration option, _LFN_UNICODE. | |
/ Changed f_readdir() to return the SFN with always upper case on non-LFN cfg. | |
/ | |
/ May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3) | |
/ Added file lock feature. (_FS_SHARE) | |
/ Added fast seek feature. (_USE_FASTSEEK) | |
/ Changed some types on the API, XCHAR->TCHAR. | |
/ Changed fname member in the FILINFO structure on Unicode cfg. | |
/ String functions support UTF-8 encoding files on Unicode cfg. | |
/ Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2) | |
/ Added sector erase feature. (_USE_ERASE) | |
/ Moved file lock semaphore table from fs object to the bss. | |
/ Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'. | |
/ Fixed f_mkfs() creates wrong FAT32 volume. | |
/ Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write(). | |
/ f_lseek() reports required table size on creating CLMP. | |
/ Extended format syntax of f_printf function. | |
/ Ignores duplicated directory separators in given path names. | |
/---------------------------------------------------------------------------*/ | |
#include "f_ff.h" /* FatFs configurations and declarations */ | |
#include "f_diskio.h" /* Declarations of low level disk I/O functions */ | |
/*-------------------------------------------------------------------------- | |
Module Private Definitions | |
---------------------------------------------------------------------------*/ | |
#if _FATFS != 8237 | |
#error Wrong include file (ff.h). | |
#endif | |
/* Definitions on sector size */ | |
#if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096 | |
#error Wrong sector size. | |
#endif | |
#if _MAX_SS != 512 | |
#define SS(fs) ((fs)->ssize) /* Multiple sector size */ | |
#else | |
#define SS(fs) 512U /* Fixed sector size */ | |
#endif | |
/* Reentrancy related */ | |
#if _FS_REENTRANT | |
#if _USE_LFN == 1 | |
#error Static LFN work area must not be used in re-entrant configuration. | |
#endif | |
#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } | |
#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } | |
#else | |
#define ENTER_FF(fs) | |
#define LEAVE_FF(fs, res) return res | |
#endif | |
#define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); } | |
/* File shareing feature */ | |
#if _FS_SHARE | |
#if _FS_READONLY | |
#error _FS_SHARE must be 0 on read-only cfg. | |
#endif | |
typedef struct { | |
FATFS *fs; /* File ID 1, volume (NULL:blank entry) */ | |
DWORD clu; /* File ID 2, directory */ | |
WORD idx; /* File ID 3, directory index */ | |
WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */ | |
} FILESEM; | |
#endif | |
/* Misc definitions */ | |
#define LD_CLUST(dir) (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO)) | |
#define ST_CLUST(dir,cl) {ST_WORD(dir+DIR_FstClusLO, cl); ST_WORD(dir+DIR_FstClusHI, (DWORD)cl>>16);} | |
#if 0 /* Removed to ff.h for application usage, by ATMEL */ | |
/* DBCS code ranges and SBCS extend char conversion table */ | |
#if _CODE_PAGE == 932 /* Japanese Shift-JIS */ | |
#define _DF1S 0x81 /* DBC 1st byte range 1 start */ | |
#define _DF1E 0x9F /* DBC 1st byte range 1 end */ | |
#define _DF2S 0xE0 /* DBC 1st byte range 2 start */ | |
#define _DF2E 0xFC /* DBC 1st byte range 2 end */ | |
#define _DS1S 0x40 /* DBC 2nd byte range 1 start */ | |
#define _DS1E 0x7E /* DBC 2nd byte range 1 end */ | |
#define _DS2S 0x80 /* DBC 2nd byte range 2 start */ | |
#define _DS2E 0xFC /* DBC 2nd byte range 2 end */ | |
#elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ | |
#define _DF1S 0x81 | |
#define _DF1E 0xFE | |
#define _DS1S 0x40 | |
#define _DS1E 0x7E | |
#define _DS2S 0x80 | |
#define _DS2E 0xFE | |
#elif _CODE_PAGE == 949 /* Korean */ | |
#define _DF1S 0x81 | |
#define _DF1E 0xFE | |
#define _DS1S 0x41 | |
#define _DS1E 0x5A | |
#define _DS2S 0x61 | |
#define _DS2E 0x7A | |
#define _DS3S 0x81 | |
#define _DS3E 0xFE | |
#elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ | |
#define _DF1S 0x81 | |
#define _DF1E 0xFE | |
#define _DS1S 0x40 | |
#define _DS1E 0x7E | |
#define _DS2S 0xA1 | |
#define _DS2E 0xFE | |
#elif _CODE_PAGE == 437 /* U.S. (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ | |
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 720 /* Arabic (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ | |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 737 /* Greek (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ | |
0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 775 /* Baltic (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ | |
0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ | |
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 852 /* Latin 2 (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \ | |
0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} | |
#elif _CODE_PAGE == 855 /* Cyrillic (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ | |
0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ | |
0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 857 /* Turkish (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ | |
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ | |
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 862 /* Hebrew (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ | |
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 866 /* Russian (OEM) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ | |
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ | |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 1250 /* Central Europe (Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \ | |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF} | |
#elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \ | |
0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF} | |
#elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \ | |
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F} | |
#elif _CODE_PAGE == 1253 /* Greek (Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ | |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \ | |
0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF} | |
#elif _CODE_PAGE == 1254 /* Turkish (Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \ | |
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F} | |
#elif _CODE_PAGE == 1255 /* Hebrew (Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ | |
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 1256 /* Arabic (Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \ | |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF} | |
#elif _CODE_PAGE == 1257 /* Baltic (Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ | |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF} | |
#elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */ | |
#define _DF1S 0 | |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \ | |
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ | |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F} | |
#elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ | |
#if _USE_LFN | |
#error Cannot use LFN feature without valid code page. | |
#endif | |
#define _DF1S 0 | |
#else | |
#error Unknown code page | |
#endif | |
#endif | |
/* Character code support macros */ | |
#define IsUpper(c) (((c)>='A')&&((c)<='Z')) | |
#define IsLower(c) (((c)>='a')&&((c)<='z')) | |
#define IsDigit(c) (((c)>='0')&&((c)<='9')) | |
#if _DF1S /* Code page is DBCS */ | |
#ifdef _DF2S /* Two 1st byte areas */ | |
#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) | |
#else /* One 1st byte area */ | |
#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) | |
#endif | |
#ifdef _DS3S /* Three 2nd byte areas */ | |
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) | |
#else /* Two 2nd byte areas */ | |
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) | |
#endif | |
#else /* Code page is SBCS */ | |
#define IsDBCS1(c) 0 | |
#define IsDBCS2(c) 0 | |
#endif /* _DF1S */ | |
/* Name status flags */ | |
#define NS 11 /* Index of name status byte in fn[] */ | |
#define NS_LOSS 0x01 /* Out of 8.3 format */ | |
#define NS_LFN 0x02 /* Force to create LFN entry */ | |
#define NS_LAST 0x04 /* Last segment */ | |
#define NS_BODY 0x08 /* Lower case flag (body) */ | |
#define NS_EXT 0x10 /* Lower case flag (ext) */ | |
#define NS_DOT 0x20 /* Dot entry */ | |
/* FAT sub-type boundaries */ | |
/* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */ | |
#define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */ | |
#define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */ | |
/* FatFs refers the members in the FAT structures as byte array instead of | |
/ structure member because the structure is not binary compatible between | |
/ different platforms */ | |
#define BS_jmpBoot 0 /* Jump instruction (3) */ | |
#define BS_OEMName 3 /* OEM name (8) */ | |
#define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ | |
#define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ | |
#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ | |
#define BPB_NumFATs 16 /* Number of FAT copies (1) */ | |
#define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */ | |
#define BPB_TotSec16 19 /* Volume size [sector] (2) */ | |
#define BPB_Media 21 /* Media descriptor (1) */ | |
#define BPB_FATSz16 22 /* FAT size [sector] (2) */ | |
#define BPB_SecPerTrk 24 /* Track size [sector] (2) */ | |
#define BPB_NumHeads 26 /* Number of heads (2) */ | |
#define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ | |
#define BPB_TotSec32 32 /* Volume size [sector] (4) */ | |
#define BS_DrvNum 36 /* Physical drive number (2) */ | |
#define BS_BootSig 38 /* Extended boot signature (1) */ | |
#define BS_VolID 39 /* Volume serial number (4) */ | |
#define BS_VolLab 43 /* Volume label (8) */ | |
#define BS_FilSysType 54 /* File system type (1) */ | |
#define BPB_FATSz32 36 /* FAT size [sector] (4) */ | |
#define BPB_ExtFlags 40 /* Extended flags (2) */ | |
#define BPB_FSVer 42 /* File system version (2) */ | |
#define BPB_RootClus 44 /* Root dir first cluster (4) */ | |
#define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */ | |
#define BPB_BkBootSec 50 /* Offset of backup boot sectot (2) */ | |
#define BS_DrvNum32 64 /* Physical drive number (2) */ | |
#define BS_BootSig32 66 /* Extended boot signature (1) */ | |
#define BS_VolID32 67 /* Volume serial number (4) */ | |
#define BS_VolLab32 71 /* Volume label (8) */ | |
#define BS_FilSysType32 82 /* File system type (1) */ | |
#define FSI_LeadSig 0 /* FSI: Leading signature (4) */ | |
#define FSI_StrucSig 484 /* FSI: Structure signature (4) */ | |
#define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ | |
#define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ | |
#define MBR_Table 446 /* MBR: Partition table offset (2) */ | |
#define SZ_PTE 16 /* MBR: Size of a partition table entry */ | |
#define BS_55AA 510 /* Boot sector signature (2) */ | |
#define DIR_Name 0 /* Short file name (11) */ | |
#define DIR_Attr 11 /* Attribute (1) */ | |
#define DIR_NTres 12 /* NT flag (1) */ | |
#define DIR_CrtTime 14 /* Created time (2) */ | |
#define DIR_CrtDate 16 /* Created date (2) */ | |
#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ | |
#define DIR_WrtTime 22 /* Modified time (2) */ | |
#define DIR_WrtDate 24 /* Modified date (2) */ | |
#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ | |
#define DIR_FileSize 28 /* File size (4) */ | |
#define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ | |
#define LDIR_Attr 11 /* LFN attribute (1) */ | |
#define LDIR_Type 12 /* LFN type (1) */ | |
#define LDIR_Chksum 13 /* Sum of corresponding SFN entry */ | |
#define LDIR_FstClusLO 26 /* Filled by zero (0) */ | |
#define SZ_DIR 32 /* Size of a directory entry */ | |
#define LLE 0x40 /* Last long entry flag in LDIR_Ord */ | |
#define DDE 0xE5 /* Deleted directory enrty mark in DIR_Name[0] */ | |
#define NDDE 0x05 /* Replacement of a character collides with DDE */ | |
/*------------------------------------------------------------*/ | |
/* Work area */ | |
#if _VOLUMES | |
static | |
FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ | |
#else | |
#error Number of drives must not be 0. | |
#endif | |
static | |
WORD Fsid; /* File system mount ID */ | |
#if _FS_RPATH | |
static | |
BYTE CurrVol; /* Current drive */ | |
#endif | |
#if _FS_SHARE | |
static | |
FILESEM Files[_FS_SHARE]; /* File lock semaphores */ | |
#endif | |
#if _USE_LFN == 0 /* No LFN */ | |
#define DEF_NAMEBUF BYTE sfn[12] | |
#define INIT_BUF(dobj) (dobj).fn = sfn | |
#define FREE_BUF() | |
#elif _USE_LFN == 1 /* LFN with static LFN working buffer */ | |
static WCHAR LfnBuf[_MAX_LFN+1]; | |
#define DEF_NAMEBUF BYTE sfn[12] | |
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; } | |
#define FREE_BUF() | |
#elif _USE_LFN == 2 /* LFN with dynamic LFN working buffer on the stack */ | |
#define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1] | |
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; } | |
#define FREE_BUF() | |
#elif _USE_LFN == 3 /* LFN with dynamic LFN working buffer on the heap */ | |
#define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn | |
#define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \ | |
if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \ | |
(dobj).lfn = lfn; (dobj).fn = sfn; } | |
#define FREE_BUF() ff_memfree(lfn) | |
#else | |
#error Wrong LFN configuration. | |
#endif | |
/*-------------------------------------------------------------------------- | |
Module Private Functions | |
---------------------------------------------------------------------------*/ | |
/*-----------------------------------------------------------------------*/ | |
/* 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 _WORD_ACCESS == 1 | |
while (cnt >= sizeof(int)) { | |
*(int*)d = *(int*)s; | |
d += sizeof(int); s += sizeof(int); | |
cnt -= sizeof(int); | |
} | |
#endif | |
while (cnt--) | |
*d++ = *s++; | |
} | |
/* Fill memory */ | |
static | |
void mem_set (void* dst, int val, UINT cnt) { | |
BYTE *d = (BYTE*)dst; | |
while (cnt--) | |
*d++ = (BYTE)val; | |
} | |
/* Compare memory to memory */ | |
static | |
int mem_cmp (const void* dst, const void* src, UINT cnt) { | |
const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; | |
int r = 0; | |
while (cnt-- && (r = *d++ - *s++) == 0) ; | |
return r; | |
} | |
/* Check if chr is contained in the string */ | |
static | |
int chk_chr (const char* str, int chr) { | |
while (*str && *str != chr) str++; | |
return *str; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Request/Release grant to access the volume */ | |
/*-----------------------------------------------------------------------*/ | |
#if _FS_REENTRANT | |
static | |
int lock_fs ( | |
FATFS *fs /* File system object */ | |
) | |
{ | |
return ff_req_grant(fs->sobj); | |
} | |
static | |
void unlock_fs ( | |
FATFS *fs, /* File system object */ | |
FRESULT res /* Result code to be returned */ | |
) | |
{ | |
if (res != FR_NOT_ENABLED && | |
res != FR_INVALID_DRIVE && | |
res != FR_INVALID_OBJECT && | |
res != FR_TIMEOUT) { | |
ff_rel_grant(fs->sobj); | |
} | |
} | |
#endif | |
/*-----------------------------------------------------------------------*/ | |
/* File shareing control functions */ | |
/*-----------------------------------------------------------------------*/ | |
#if _FS_SHARE | |
static | |
FRESULT chk_lock ( /* Check if the file can be accessed */ | |
DIR* dj, /* Directory object pointing the file to be checked */ | |
int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ | |
) | |
{ | |
UINT i, be; | |
/* Search file semaphore table */ | |
for (i = be = 0; i < _FS_SHARE; i++) { | |
if (Files[i].fs) { /* Existing entry */ | |
if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */ | |
Files[i].clu == dj->sclust && | |
Files[i].idx == dj->index) break; | |
} else { /* Blank entry */ | |
be++; | |
} | |
} | |
if (i == _FS_SHARE) /* The file is not opened */ | |
return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */ | |
/* The file 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 ( /* Check if an entry is available for a new file */ | |
FATFS* fs /* File system object */ | |
) | |
{ | |
UINT i; | |
for (i = 0; i < _FS_SHARE && Files[i].fs; i++) ; | |
return (i == _FS_SHARE) ? 0 : 1; | |
} | |
static | |
UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */ | |
DIR* dj, /* Directory object pointing the file to register or increment */ | |
int acc /* Desired access mode (0:Read, !0:Write) */ | |
) | |
{ | |
UINT i; | |
for (i = 0; i < _FS_SHARE; i++) { /* Find the file */ | |
if (Files[i].fs == dj->fs && | |
Files[i].clu == dj->sclust && | |
Files[i].idx == dj->index) break; | |
} | |
if (i == _FS_SHARE) { /* Not opened. Register it as new. */ | |
for (i = 0; i < _FS_SHARE && Files[i].fs; i++) ; | |
if (i == _FS_SHARE) return 0; /* No space to register (int err) */ | |
Files[i].fs = dj->fs; | |
Files[i].clu = dj->sclust; | |
Files[i].idx = dj->index; | |
Files[i].ctr = 0; | |
} | |
if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ | |
Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ | |
return i + 1; | |
} | |
static | |
FRESULT dec_lock ( /* Decrement file open counter */ | |
UINT i /* Semaphore index */ | |
) | |
{ | |
WORD n; | |
FRESULT res; | |
if (--i < _FS_SHARE) { | |
n = Files[i].ctr; | |
if (n == 0x100) n = 0; | |
if (n) n--; | |
Files[i].ctr = n; | |
if (!n) Files[i].fs = 0; | |
res = FR_OK; | |
} else { | |
res = FR_INT_ERR; | |
} | |
return res; | |
} | |
static | |
void clear_lock ( /* Clear lock entries of the volume */ | |
FATFS *fs | |
) | |
{ | |
UINT i; | |
for (i = 0; i < _FS_SHARE; i++) { | |
if (Files[i].fs == fs) Files[i].fs = 0; | |
} | |
} | |
#endif | |
/*-----------------------------------------------------------------------*/ | |
/* Change window offset */ | |
/*-----------------------------------------------------------------------*/ | |
static | |
FRESULT move_window ( | |
FATFS *fs, /* File system object */ | |
DWORD sector /* Sector number to make appearance in the fs->win[] */ | |
) /* Move to zero only writes back dirty window */ | |
{ | |
DWORD wsect; | |
wsect = fs->winsect; | |
if (wsect != sector) { /* Changed current window */ | |
#if !_FS_READONLY | |
if (fs->wflag) { /* Write back dirty window if needed */ | |
if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) | |
return FR_DISK_ERR; | |
fs->wflag = 0; | |
if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */ | |
BYTE nf; | |
for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */ | |
wsect += fs->fsize; | |
disk_write(fs->drv, fs->win, wsect, 1); | |
} | |
} | |
} | |
#endif | |
if (sector) { | |
if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) | |
return FR_DISK_ERR; | |
fs->winsect = sector; | |
} | |
} | |
return FR_OK; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Clean-up cached data */ | |
/*-----------------------------------------------------------------------*/ | |
#if !_FS_READONLY | |
static | |
FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */ | |
FATFS *fs /* File system object */ | |
) | |
{ | |
FRESULT res; | |
res = move_window(fs, 0); | |
if (res == FR_OK) { | |
/* Update FSInfo sector if needed */ | |
if (fs->fs_type == FS_FAT32 && fs->fsi_flag) { | |
fs->winsect = 0; | |
/* Create FSInfo structure */ | |
mem_set(fs->win, 0, 512); | |
ST_WORD(fs->win+BS_55AA, 0xAA55); | |
ST_DWORD(fs->win+FSI_LeadSig, 0x41615252); | |
ST_DWORD(fs->win+FSI_StrucSig, 0x61417272); | |
ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust); | |
ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust); | |
/* Write it into the FSInfo sector */ | |
disk_write(fs->drv, fs->win, fs->fsi_sector, 1); | |
fs->fsi_flag = 0; | |
} | |
/* Make sure that no pending write process in the physical drive */ | |
if (disk_ioctl(fs->drv, CTRL_SYNC, (void*)0) != RES_OK) | |
res = FR_DISK_ERR; | |
} | |
return res; | |
} | |
#endif | |
/*-----------------------------------------------------------------------*/ | |
/* Get sector# from cluster# */ | |
/*-----------------------------------------------------------------------*/ | |
DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ | |
FATFS *fs, /* File system object */ | |
DWORD clst /* Cluster# to be converted */ | |
) | |
{ | |
clst -= 2; | |
if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */ | |
return clst * fs->csize + fs->database; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* FAT access - Read value of a FAT entry */ | |
/*-----------------------------------------------------------------------*/ | |
DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */ | |
FATFS *fs, /* File system object */ | |
DWORD clst /* Cluster# to get the link information */ | |
) | |
{ | |
UINT wc, bc; | |
BYTE *p; | |
if (clst < 2 || clst >= fs->n_fatent) /* Chack range */ | |
return 1; | |
switch (fs->fs_type) { | |
case FS_FAT12 : | |
bc = (UINT)clst; bc += bc / 2; | |
if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; | |
wc = fs->win[bc % SS(fs)]; bc++; | |
if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; | |
wc |= fs->win[bc % SS(fs)] << 8; | |
return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); | |
case FS_FAT16 : | |
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break; | |
p = &fs->win[clst * 2 % SS(fs)]; | |
return LD_WORD(p); | |
case FS_FAT32 : | |
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break; | |
p = &fs->win[clst * 4 % SS(fs)]; | |
return LD_DWORD(p) & 0x0FFFFFFF; | |
} | |
return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */ | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* FAT access - Change value of a FAT entry */ | |
/*-----------------------------------------------------------------------*/ | |
#if !_FS_READONLY | |
FRESULT put_fat ( | |
FATFS *fs, /* File system object */ | |
DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */ | |
DWORD val /* New value to mark the cluster */ | |
) | |
{ | |
UINT bc; | |
BYTE *p; | |
FRESULT res; | |
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ | |
res = FR_INT_ERR; | |
} else { | |
switch (fs->fs_type) { | |
case FS_FAT12 : | |
bc = clst; bc += bc / 2; | |
res = move_window(fs, fs->fatbase + (bc / SS(fs))); | |
if (res != FR_OK) break; | |
p = &fs->win[bc % SS(fs)]; | |
*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; | |
bc++; | |
fs->wflag = 1; | |
res = move_window(fs, fs->fatbase + (bc / SS(fs))); | |
if (res != FR_OK) break; | |
p = &fs->win[bc % SS(fs)]; | |
*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); | |
break; | |
case FS_FAT16 : | |
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); | |
if (res != FR_OK) break; | |
p = &fs->win[clst * 2 % SS(fs)]; | |
ST_WORD(p, (WORD)val); | |
break; | |
case FS_FAT32 : | |
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); | |
if (res != FR_OK) break; | |
p = &fs->win[clst * 4 % SS(fs)]; | |
val |= LD_DWORD(p) & 0xF0000000; | |
ST_DWORD(p, val); | |
break; | |
default : | |
res = FR_INT_ERR; | |
} | |
fs->wflag = 1; | |
} | |
return res; | |
} | |
#endif /* !_FS_READONLY */ | |
/*-----------------------------------------------------------------------*/ | |
/* FAT handling - Remove a cluster chain */ | |
/*-----------------------------------------------------------------------*/ | |
#if !_FS_READONLY | |
static | |
FRESULT remove_chain ( | |
FATFS *fs, /* File system object */ | |
DWORD clst /* Cluster# to remove a chain from */ | |
) | |
{ | |
FRESULT res; | |
DWORD nxt; | |
#if _USE_ERASE | |
DWORD scl = clst, ecl = clst, resion[2]; | |
#endif | |
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ | |
res = FR_INT_ERR; | |
} else { | |
res = FR_OK; | |
while (clst < fs->n_fatent) { /* Not a last link? */ | |
nxt = get_fat(fs, clst); /* Get cluster status */ | |
if (nxt == 0) break; /* Empty cluster? */ | |
if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ | |
if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ | |
res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ | |
if (res != FR_OK) break; | |
if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */ | |
fs->free_clust++; | |
fs->fsi_flag = 1; | |
} | |
#if _USE_ERASE | |
if (ecl + 1 == nxt) { /* Next cluster is contiguous */ | |
ecl = nxt; | |
} else { /* End of contiguous clusters */ | |
resion[0] = clust2sect(fs, scl); /* Start sector */ | |
resion[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ | |
disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, resion); /* Erase the block */ | |
scl = ecl = nxt; | |
} | |
#endif | |
clst = nxt; /* Next cluster */ | |
} | |
} | |
return res; | |
} | |
#endif | |
/*-----------------------------------------------------------------------*/ | |
/* FAT handling - Stretch or Create a cluster chain */ | |
/*-----------------------------------------------------------------------*/ | |
#if !_FS_READONLY | |
static | |
DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ | |
FATFS *fs, /* File system object */ | |
DWORD clst /* Cluster# to stretch. 0 means create a new chain. */ | |
) | |
{ | |
DWORD cs, ncl, scl; | |
FRESULT res; | |
if (clst == 0) { /* Create a new chain */ | |
scl = fs->last_clust; /* Get suggested start point */ | |
if (!scl || scl >= fs->n_fatent) scl = 1; | |
} | |
else { /* Stretch the current chain */ | |
cs = get_fat(fs, clst); /* Check the cluster status */ | |
if (cs < 2) return 1; /* It is an invalid cluster */ | |
if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ | |
scl = clst; | |
} | |
ncl = scl; /* Start cluster */ | |
for (;;) { | |
ncl++; /* Next cluster */ | |
if (ncl >= fs->n_fatent) { /* Wrap around */ | |
ncl = 2; | |
if (ncl > scl) return 0; /* No free cluster */ | |
} | |
cs = get_fat(fs, ncl); /* Get the cluster status */ | |
if (cs == 0) break; /* Found a free cluster */ | |
if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ | |
return cs; | |
if (ncl == scl) return 0; /* No free cluster */ | |
} | |
res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */ | |
if (res == FR_OK && clst != 0) { | |
res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ | |
} | |
if (res == FR_OK) { | |
fs->last_clust = ncl; /* Update FSINFO */ | |
if (fs->free_clust != 0xFFFFFFFF) { | |
fs->free_clust--; | |
fs->fsi_flag = 1; | |
} | |
} else { | |
ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; | |
} | |
return ncl; /* Return new cluster number or error code */ | |
} | |
#endif /* !_FS_READONLY */ | |
/*-----------------------------------------------------------------------*/ | |
/* FAT handling - Convert offset into cluster with link map table */ | |
/*-----------------------------------------------------------------------*/ | |
#if _USE_FASTSEEK | |
static | |
DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ | |
FIL* fp, /* Pointer to the file object */ | |
DWORD ofs /* File offset to be converted to cluster# */ | |
) | |
{ | |
DWORD cl, ncl, *tbl; | |
tbl = fp->cltbl + 1; /* Top of CLMT */ | |
cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */ | |
for (;;) { | |
ncl = *tbl++; /* Number of cluters in the fragment */ | |
if (!ncl) return 0; /* End of table? (error) */ | |
if (cl < ncl) break; /* In this fragment? */ | |
cl -= ncl; tbl++; /* Next fragment */ | |
} | |
return cl + *tbl; /* Return the cluster number */ | |
} | |
#endif /* _USE_FASTSEEK */ | |
/*-----------------------------------------------------------------------*/ | |
/* Directory handling - Set directory index */ | |
/*-----------------------------------------------------------------------*/ | |
static | |
FRESULT dir_sdi ( | |
DIR *dj, /* Pointer to directory object */ | |
WORD idx /* Directory index number */ | |
) | |
{ | |
DWORD clst; | |
WORD ic; | |
dj->index = idx; | |
clst = dj->sclust; | |
if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */ | |
return FR_INT_ERR; | |
if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ | |
clst = dj->fs->dirbase; | |
if (clst == 0) { /* Static table (root-dir in FAT12/16) */ | |
dj->clust = clst; | |
if (idx >= dj->fs->n_rootdir) /* Index is out of range */ | |
return FR_INT_ERR; | |
dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ | |
} | |
else { /* Dynamic table (sub-dirs or root-dir in FAT32) */ | |
ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */ | |
while (idx >= ic) { /* Follow cluster chain */ | |
clst = get_fat(dj->fs, clst); /* Get next cluster */ | |
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ | |
if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */ | |
return FR_INT_ERR; | |
idx -= ic; | |
} | |
dj->clust = clst; | |
dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ | |
} | |
dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */ | |
return FR_OK; /* Seek succeeded */ | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Directory handling - Move directory index next */ | |
/*-----------------------------------------------------------------------*/ | |
static | |
FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */ | |
DIR *dj, /* Pointer to directory object */ | |
int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ | |
) | |
{ | |
DWORD clst; | |
WORD i; | |
i = dj->index + 1; | |
if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ | |
return FR_NO_FILE; | |
if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */ | |
dj->sect++; /* Next sector */ | |
if (dj->clust == 0) { /* Static table */ | |
if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */ | |
return FR_NO_FILE; | |
} | |
else { /* Dynamic table */ | |
if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */ | |
clst = get_fat(dj->fs, dj->clust); /* Get next cluster */ | |
if (clst <= 1) return FR_INT_ERR; | |
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; | |
if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */ | |
#if !_FS_READONLY | |
BYTE c; | |
if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */ | |
clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */ | |
if (clst == 0) return FR_DENIED; /* No free cluster */ | |
if (clst == 1) return FR_INT_ERR; | |
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; | |
/* Clean-up stretched table */ | |
if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */ | |
mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */ | |
dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */ | |
for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */ | |
dj->fs->wflag = 1; | |
if (move_window(dj->fs, 0)) return FR_DISK_ERR; | |
dj->fs->winsect++; | |
} | |
dj->fs->winsect -= c; /* Rewind window address */ | |
#else | |
return FR_NO_FILE; /* Report EOT */ | |
#endif | |
} | |
dj->clust = clst; /* Initialize data for new cluster */ | |
dj->sect = clust2sect(dj->fs, clst); | |
} | |
} | |
} | |
dj->index = i; | |
dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; | |
return FR_OK; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ | |
/*-----------------------------------------------------------------------*/ | |
#if _USE_LFN | |
static | |
const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */ | |
static | |
int cmp_lfn ( /* 1:Matched, 0:Not matched */ | |
WCHAR *lfnbuf, /* Pointer to the LFN to be compared */ | |
BYTE *dir /* Pointer to the directory entry containing a part of LFN */ | |
) | |
{ | |
UINT i, s; | |
WCHAR wc, uc; | |
i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */ | |
s = 0; wc = 1; | |
do { | |
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ | |
if (wc) { /* Last char has not been processed */ | |
wc = ff_wtoupper(uc); /* Convert it to upper case */ | |
if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */ | |
return 0; /* Not matched */ | |
} else { | |
if (uc != 0xFFFF) return 0; /* Check filler */ | |
} | |
} while (++s < 13); /* Repeat until all chars in the entry are checked */ | |
if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */ | |
return 0; | |
return 1; /* The part of LFN matched */ | |
} | |
static | |
int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */ | |
WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */ | |
BYTE *dir /* Pointer to the directory entry */ | |
) | |
{ | |
UINT i, s; | |
WCHAR wc, uc; | |
i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ | |
s = 0; wc = 1; | |
do { | |
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ | |
if (wc) { /* Last char has not been processed */ | |
if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ | |
lfnbuf[i++] = wc = uc; /* Store it */ | |
} else { | |
if (uc != 0xFFFF) return 0; /* Check filler */ | |
} | |
} while (++s < 13); /* Read all character in the entry */ | |
if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */ | |
if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ | |
lfnbuf[i] = 0; | |
} | |
return 1; | |
} | |
#if !_FS_READONLY | |
static | |
void fit_lfn ( | |
const WCHAR *lfnbuf, /* Pointer to the LFN buffer */ | |
BYTE *dir, /* Pointer to the directory entry */ | |
BYTE ord, /* LFN order (1-20) */ | |
BYTE sum /* SFN sum */ | |
) | |
{ | |
UINT i, s; | |
WCHAR wc; | |
dir[LDIR_Chksum] = sum; /* Set check sum */ | |
dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ | |
dir[LDIR_Type] = 0; | |
ST_WORD(dir+LDIR_FstClusLO, 0); | |
i = (ord - 1) * 13; /* Get offset in the LFN buffer */ | |
s = wc = 0; | |
do { | |
if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */ | |
ST_WORD(dir+LfnOfs[s], wc); /* Put it */ | |
if (!wc) wc = 0xFFFF; /* Padding chars following last char */ | |
} while (++s < 13); | |
if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */ | |
dir[LDIR_Ord] = ord; /* Set the LFN order */ | |
} | |
#endif | |
#endif | |
/*-----------------------------------------------------------------------*/ | |
/* Create numbered name */ | |
/*-----------------------------------------------------------------------*/ | |
#if _USE_LFN | |
void gen_numname ( | |
BYTE *dst, /* Pointer to generated SFN */ | |
const BYTE *src, /* Pointer to source SFN to be modified */ | |
const WCHAR *lfn, /* Pointer to LFN */ | |
WORD seq /* Sequence number */ | |
) | |
{ | |
BYTE ns[8], c; | |
UINT i, j; | |
mem_cpy(dst, src, 11); | |
if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ | |
do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn); | |
} | |
/* itoa (hexdecimal) */ | |
i = 7; | |
do { | |
c = (seq % 16) + '0'; | |
if (c > '9') c += 7; | |
ns[i--] = c; | |
seq /= 16; | |
} while (seq); | |
ns[i] = '~'; | |
/* Append the number */ | |
for (j = 0; j < i && dst[j] != ' '; j++) { | |
if (IsDBCS1(dst[j])) { | |
if (j == i - 1) break; | |
j++; | |
} | |
} | |
do { | |
dst[j++] = (i < 8) ? ns[i++] : ' '; | |
} while (j < 8); | |
} | |
#endif | |
/*-----------------------------------------------------------------------*/ | |
/* Calculate sum of an SFN */ | |
/*-----------------------------------------------------------------------*/ | |
#if _USE_LFN | |
static | |
BYTE sum_sfn ( | |
const BYTE *dir /* Ptr to directory entry */ | |
) | |
{ | |
BYTE sum = 0; | |
UINT n = 11; | |
do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); | |
return sum; | |
} | |
#endif | |
/*-----------------------------------------------------------------------*/ | |
/* Directory handling - Find an object in the directory */ | |
/*-----------------------------------------------------------------------*/ | |
static | |
FRESULT dir_find ( | |
DIR *dj /* Pointer to the directory object linked to the file name */ | |
) | |
{ | |
FRESULT res; | |
BYTE c, *dir; | |
#if _USE_LFN | |
BYTE a, ord, sum; | |
#endif | |
res = dir_sdi(dj, 0); /* Rewind directory object */ | |
if (res != FR_OK) return res; | |
#if _USE_LFN | |
ord = sum = 0xFF; | |
#endif | |
do { | |
res = move_window(dj->fs, dj->sect); | |
if (res != FR_OK) break; | |
dir = dj->dir; /* Ptr to the directory entry of current index */ | |
c = dir[DIR_Name]; | |
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ | |
#if _USE_LFN /* LFN configuration */ | |
a = dir[DIR_Attr] & AM_MASK; | |
if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ | |
ord = 0xFF; | |
} else { | |
if (a == AM_LFN) { /* An LFN entry is found */ | |
if (dj->lfn) { | |
if (c & LLE) { /* Is it start of LFN sequence? */ | |
sum = dir[LDIR_Chksum]; | |
c &= ~LLE; ord = c; /* LFN start order */ | |
dj->lfn_idx = dj->index; | |
} | |
/* Check validity of the LFN entry and compare it with given name */ | |
ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; | |
} | |
} else { /* An SFN entry is found */ | |
if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ | |
ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */ | |
if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */ | |
} | |
} | |
#else /* Non LFN configuration */ | |
if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ | |
break; | |
#endif | |
res = dir_next(dj, 0); /* Next entry */ | |
} while (res == FR_OK); | |
return res; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Read an object from the directory */ | |
/*-----------------------------------------------------------------------*/ | |
#if _FS_MINIMIZE <= 1 | |
static | |
FRESULT dir_read ( | |
DIR *dj /* Pointer to the directory object that pointing the entry to be read */ | |
) | |
{ | |
FRESULT res; | |
BYTE c, *dir; | |
#if _USE_LFN | |
BYTE a, ord = 0xFF, sum = 0xFF; | |
#endif | |
res = FR_NO_FILE; | |
while (dj->sect) { | |
res = move_window(dj->fs, dj->sect); | |
if (res != FR_OK) break; | |
dir = dj->dir; /* Ptr to the directory entry of current index */ | |
c = dir[DIR_Name]; | |
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ | |
#if _USE_LFN /* LFN configuration */ | |
a = dir[DIR_Attr] & AM_MASK; | |
if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ | |
ord = 0xFF; | |
} else { | |
if (a == AM_LFN) { /* An LFN entry is found */ | |
if (c & LLE) { /* Is it start of LFN sequence? */ | |
sum = dir[LDIR_Chksum]; | |
c &= ~LLE; ord = c; | |
dj->lfn_idx = dj->index; | |
} | |
/* Check LFN validity and capture it */ | |
ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; | |
} else { /* An SFN entry is found */ | |
if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ | |
dj->lfn_idx = 0xFFFF; /* It has no LFN. */ | |
break; | |
} | |
} | |
#else /* Non LFN configuration */ | |
if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */ | |
break; | |
#endif | |
res = dir_next(dj, 0); /* Next entry */ | |
if (res != FR_OK) break; | |
} | |
if (res != FR_OK) dj->sect = 0; | |
return res; | |
} | |
#endif | |
/*-----------------------------------------------------------------------*/ | |
/* Register an object to the directory */ | |
/*-----------------------------------------------------------------------*/ | |
#if !_FS_READONLY | |
static | |
FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */ | |
DIR *dj /* Target directory with object name to be created */ | |
) | |
{ | |
FRESULT res; | |
BYTE c, *dir; | |
#if _USE_LFN /* LFN configuration */ | |
WORD n, ne, is; | |
BYTE sn[12], *fn, sum; | |
WCHAR *lfn; | |
fn = dj->fn; lfn = dj->lfn; | |
mem_cpy(sn, fn, 12); | |
if (_FS_RPATH && (sn[NS] & NS_DOT)) /* Cannot create dot entry */ | |
return FR_INVALID_NAME; | |
if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ | |
fn[NS] = 0; dj->lfn = 0; /* Find only SFN */ | |
for (n = 1; n < 100; n++) { | |
gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ | |
res = dir_find(dj); /* Check if the name collides with existing SFN */ | |
if (res != FR_OK) break; | |
} | |
if (n == 100) return FR_DENIED; /* Abort if too many collisions */ | |
if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ | |
fn[NS] = sn[NS]; dj->lfn = lfn; | |
} | |
if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */ | |
for (ne = 0; lfn[ne]; ne++) ; | |
ne = (ne + 25) / 13; | |
} else { /* Otherwise reserve only an SFN entry. */ | |
ne = 1; | |
} | |
/* Reserve contiguous entries */ | |
res = dir_sdi(dj, 0); | |
if (res != FR_OK) return res; | |
n = is = 0; | |
do { | |
res = move_window(dj->fs, dj->sect); | |
if (res != FR_OK) break; | |
c = *dj->dir; /* Check the entry status */ | |
if (c == DDE || c == 0) { /* Is it a blank entry? */ | |
if (n == 0) is = dj->index; /* First index of the contiguous entry */ | |
if (++n == ne) break; /* A contiguous entry that required count is found */ | |
} else { | |
n = 0; /* Not a blank entry. Restart to search */ | |
} | |
res = dir_next(dj, 1); /* Next entry with table stretch */ | |
} while (res == FR_OK); | |
if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */ | |
res = dir_sdi(dj, is); | |
if (res == FR_OK) { | |
sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */ | |
ne--; | |
do { /* Store LFN entries in bottom first */ | |
res = move_window(dj->fs, dj->sect); | |
if (res != FR_OK) break; | |
fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum); | |
dj->fs->wflag = 1; | |
res = dir_next(dj, 0); /* Next entry */ | |
} while (res == FR_OK && --ne); | |
} | |
} | |
#else /* Non LFN configuration */ | |
res = dir_sdi(dj, 0); | |
if (res == FR_OK) { | |
do { /* Find a blank entry for the SFN */ | |
res = move_window(dj->fs, dj->sect); | |
if (res != FR_OK) break; | |
c = *dj->dir; | |
if (c == DDE || c == 0) break; /* Is it a blank entry? */ | |
res = dir_next(dj, 1); /* Next entry with table stretch */ | |
} while (res == FR_OK); | |
} | |
#endif | |
if (res == FR_OK) { /* Initialize the SFN entry */ | |
res = move_window(dj->fs, dj->sect); | |
if (res == FR_OK) { | |
dir = dj->dir; | |
mem_set(dir, 0, SZ_DIR); /* Clean the entry */ | |
mem_cpy(dir, dj->fn, 11); /* Put SFN */ | |
#if _USE_LFN | |
dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */ | |
#endif | |
dj->fs->wflag = 1; | |
} | |
} | |
return res; | |
} | |
#endif /* !_FS_READONLY */ | |
/*-----------------------------------------------------------------------*/ | |
/* Remove an object from the directory */ | |
/*-----------------------------------------------------------------------*/ | |
#if !_FS_READONLY && !_FS_MINIMIZE | |
static | |
FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */ | |
DIR *dj /* Directory object pointing the entry to be removed */ | |
) | |
{ | |
FRESULT res; | |
#if _USE_LFN /* LFN configuration */ | |
WORD i; | |
i = dj->index; /* SFN index */ | |
res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */ | |
if (res == FR_OK) { | |
do { | |
res = move_window(dj->fs, dj->sect); | |
if (res != FR_OK) break; | |
*dj->dir = DDE; /* Mark the entry "deleted" */ | |
dj->fs->wflag = 1; | |
if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ | |
res = dir_next(dj, 0); /* Next entry */ | |
} while (res == FR_OK); | |
if (res == FR_NO_FILE) res = FR_INT_ERR; | |
} | |
#else /* Non LFN configuration */ | |
res = dir_sdi(dj, dj->index); | |
if (res == FR_OK) { | |
res = move_window(dj->fs, dj->sect); | |
if (res == FR_OK) { | |
*dj->dir = DDE; /* Mark the entry "deleted" */ | |
dj->fs->wflag = 1; | |
} | |
} | |
#endif | |
return res; | |
} | |
#endif /* !_FS_READONLY */ | |
/*-----------------------------------------------------------------------*/ | |
/* Pick a segment and create the object name in directory form */ | |
/*-----------------------------------------------------------------------*/ | |
static | |
FRESULT create_name ( | |
DIR *dj, /* Pointer to the directory object */ | |
const TCHAR **path /* Pointer to pointer to the segment in the path string */ | |
) | |
{ | |
#ifdef _EXCVT | |
static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */ | |
#endif | |
#if _USE_LFN /* LFN configuration */ | |
BYTE b, cf; | |
WCHAR w, *lfn; | |
UINT i, ni, si, di; | |
const TCHAR *p; | |
/* Create LFN in Unicode */ | |
for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ | |
lfn = dj->lfn; | |
si = di = 0; | |
for (;;) { | |
w = p[si++]; /* Get a character */ | |
if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ | |
if (di >= _MAX_LFN) /* Reject too long name */ | |
return FR_INVALID_NAME; | |
#if !_LFN_UNICODE | |
w &= 0xFF; | |
if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ | |
b = (BYTE)p[si++]; /* Get 2nd byte */ | |
if (!IsDBCS2(b)) | |
return FR_INVALID_NAME; /* Reject invalid sequence */ | |
else /* Added by ATMEL, remove warnings */ | |
w = (w << 8) + b; /* Create a DBC */ | |
} | |
w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ | |
if (!w) return FR_INVALID_NAME; /* Reject invalid code */ | |
#endif | |
if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */ | |
return FR_INVALID_NAME; | |
lfn[di++] = w; /* Store the Unicode char */ | |
} | |
*path = &p[si]; /* Return pointer to the next segment */ | |
cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ | |
#if _FS_RPATH | |
if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */ | |
(di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) { | |
lfn[di] = 0; | |
for (i = 0; i < 11; i++) | |
dj->fn[i] = (i < di) ? '.' : ' '; | |
dj->fn[i] = cf | NS_DOT; /* This is a dot entry */ | |
return FR_OK; | |
} | |
#endif | |
while (di) { /* Strip trailing spaces and dots */ | |
w = lfn[di-1]; | |
if (w != ' ' && w != '.') break; | |
di--; | |
} | |
if (!di) return FR_INVALID_NAME; /* Reject nul string */ | |
lfn[di] = 0; /* LFN is created */ | |
/* Create SFN in directory form */ | |
mem_set(dj->fn, ' ', 11); | |
for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ | |
if (si) cf |= NS_LOSS | NS_LFN; | |
while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ | |
b = i = 0; ni = 8; | |
for (;;) { | |
w = lfn[si++]; /* Get an LFN char */ | |
if (!w) break; /* Break on end of the LFN */ | |
if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ | |
cf |= NS_LOSS | NS_LFN; continue; | |
} | |
if (i >= ni || si == di) { /* Extension or end of SFN */ | |
if (ni == 11) { /* Long extension */ | |
cf |= NS_LOSS | NS_LFN; break; | |
} | |
if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ | |
if (si > di) break; /* No extension */ | |
si = di; i = 8; ni = 11; /* Enter extension section */ | |
b <<= 2; continue; | |
} | |
if (w >= 0x80) { /* Non ASCII char */ | |
#ifdef _EXCVT | |
w = ff_convert(w, 0); /* Unicode -> OEM code */ | |
if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */ | |
#else | |
w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ | |
#endif | |
cf |= NS_LFN; /* Force create LFN entry */ | |
} | |
if (_DF1S && w >= 0x100) { /* Double byte char (always false on SBCS cfg) */ | |
if (i >= ni - 1) { | |
cf |= NS_LOSS | NS_LFN; i = ni; continue; | |
} | |
dj->fn[i++] = (BYTE)(w >> 8); | |
} else { /* Single byte char */ | |
if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */ | |
w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ | |
} else { | |
if (IsUpper(w)) { /* ASCII large capital */ | |
b |= 2; | |
} else { | |
if (IsLower(w)) { /* ASCII small capital */ | |
b |= 1; w -= 0x20; | |
} | |
} | |
} | |
} | |
dj->fn[i++] = (BYTE)w; | |
} | |
if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */ | |
if (ni == 8) b <<= 2; | |
if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ | |
cf |= NS_LFN; | |
if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */ | |
if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ | |
if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ | |
} | |
dj->fn[NS] = cf; /* SFN is created */ | |
return FR_OK; | |
#else /* Non-LFN configuration */ | |
BYTE b, c, d, *sfn; | |
UINT ni, si, i; | |
const char *p; | |
/* Create file name in directory form */ | |
for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ | |
sfn = dj->fn; | |
mem_set(sfn, ' ', 11); | |
si = i = b = 0; ni = 8; | |
#if _FS_RPATH | |
if (p[si] == '.') { /* Is this a dot entry? */ | |
for (;;) { | |
c = (BYTE)p[si++]; | |
if (c != '.' || si >= 3) break; | |
sfn[i++] = c; | |
} | |
if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; | |
*path = &p[si]; /* Return pointer to the next segment */ | |
sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ | |
return FR_OK; | |
} | |
#endif | |
for (;;) { | |
c = (BYTE)p[si++]; | |
if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ | |
if (c == '.' || i >= ni) { | |
if (ni != 8 || c != '.') return FR_INVALID_NAME; | |
i = 8; ni = 11; | |
b <<= 2; continue; | |
} | |
if (c >= 0x80) { /* Extended char? */ | |
b |= 3; /* Eliminate NT flag */ | |
#ifdef _EXCVT | |
c = excvt[c-0x80]; /* Upper conversion (SBCS) */ | |
#else | |
#if !_DF1S /* ASCII only cfg */ | |
return FR_INVALID_NAME; | |
#endif | |
#endif | |
} | |
if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ | |
d = (BYTE)p[si++]; /* Get 2nd byte */ | |
if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ | |
return FR_INVALID_NAME; | |
sfn[i++] = c; | |
sfn[i++] = d; | |
} else { /* Single byte code */ | |
if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */ | |
return FR_INVALID_NAME; | |
if (IsUpper(c)) { /* ASCII large capital? */ | |
b |= 2; | |
} else { | |
if (IsLower(c)) { /* ASCII small capital? */ | |
b |= 1; c -= 0x20; | |
} | |
} | |
sfn[i++] = c; | |
} | |
} | |
*path = &p[si]; /* Return pointer to the next segment */ | |
c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ | |
if (!i) return FR_INVALID_NAME; /* Reject nul string */ | |
if (sfn[0] == DDE) sfn[0] = NDDE; /* When first char collides with DDE, replace it with 0x05 */ | |
if (ni == 8) b <<= 2; | |
if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */ | |
if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */ | |
sfn[NS] = c; /* Store NT flag, File name is created */ | |
return FR_OK; | |
#endif | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Get file information from directory entry */ | |
/*-----------------------------------------------------------------------*/ | |
#if _FS_MINIMIZE <= 1 | |
static | |
void get_fileinfo ( /* No return code */ | |
DIR *dj, /* Pointer to the directory object */ | |
FILINFO *fno /* Pointer to the file information to be filled */ | |
) | |
{ | |
UINT i; | |
BYTE nt, *dir; | |
TCHAR *p, c; | |
p = fno->fname; | |
if (dj->sect) { | |
dir = dj->dir; | |
nt = dir[DIR_NTres]; /* NT flag */ | |
for (i = 0; i < 8; i++) { /* Copy name body */ | |
c = dir[i]; | |
if (c == ' ') break; | |
if (c == NDDE) c = (TCHAR)DDE; | |
if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20; | |
#if _LFN_UNICODE | |
if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1])) | |
c = (c << 8) | dir[++i]; | |
c = ff_convert(c, 1); | |
if (!c) c = '?'; | |
#endif | |
*p++ = c; | |
} | |
if (dir[8] != ' ') { /* Copy name extension */ | |
*p++ = '.'; | |
for (i = 8; i < 11; i++) { | |
c = dir[i]; | |
if (c == ' ') break; | |
if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20; | |
#if _LFN_UNICODE | |
if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1])) | |
c = (c << 8) | dir[++i]; | |
c = ff_convert(c, 1); | |
if (!c) c = '?'; | |
#endif | |
*p++ = c; | |
} | |
} | |
fno->fattrib = dir[DIR_Attr]; /* Attribute */ | |
fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ | |
fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ | |
fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ | |
} | |
*p = 0; /* Terminate SFN str by a \0 */ | |
#if _USE_LFN | |
if (fno->lfname && fno->lfsize) { | |
TCHAR *tp = fno->lfname; | |
WCHAR w, *lfn; | |
i = 0; | |
if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */ | |
lfn = dj->lfn; | |
while ((w = *lfn++) != 0) { /* Get an LFN char */ | |
#if !_LFN_UNICODE | |
w = ff_convert(w, 0); /* Unicode -> OEM conversion */ | |
if (!w) { i = 0; break; } /* Could not convert, no LFN */ | |
if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ | |
tp[i++] = (TCHAR)(w >> 8); | |
#endif | |
if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overflow, no LFN */ | |
tp[i++] = (TCHAR)w; | |
} | |
} | |
tp[i] = 0; /* Terminate the LFN str by a \0 */ | |
} | |
#endif | |
} | |
#endif /* _FS_MINIMIZE <= 1 */ | |
/*-----------------------------------------------------------------------*/ | |
/* Follow a file path */ | |
/*-----------------------------------------------------------------------*/ | |
static | |
FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ | |
DIR *dj, /* Directory object to return last directory and found object */ | |
const TCHAR *path /* Full-path string to find a file or directory */ | |
) | |
{ | |
FRESULT res; | |
BYTE *dir, ns; | |
#if _FS_RPATH | |
if (*path == '/' || *path == '\\') { /* There is a heading separator */ | |
path++; dj->sclust = 0; /* Strip it and start from the root dir */ | |
} else { /* No heading separator */ | |
dj->sclust = dj->fs->cdir; /* Start from the current dir */ | |
} | |
#else | |
if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ | |
path++; | |
dj->sclust = 0; /* Start from the root dir */ | |
#endif | |
if ((UINT)*path < ' ') { /* Nul path means the start directory itself */ | |
res = dir_sdi(dj, 0); | |
dj->dir = 0; | |
} else { /* Follow path */ | |
for (;;) { | |
res = create_name(dj, &path); /* Get a segment */ | |
if (res != FR_OK) break; | |
res = dir_find(dj); /* Find it */ | |
ns = *(dj->fn+NS); | |
if (res != FR_OK) { /* Failed to find the object */ | |
if (res != FR_NO_FILE) break; /* Abort if any hard error occured */ | |
/* Object not found */ | |
if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */ | |
dj->sclust = 0; dj->dir = 0; /* It is the root dir */ | |
res = FR_OK; | |
if (!(ns & NS_LAST)) continue; | |
} else { /* Could not find the object */ | |
if (!(ns & NS_LAST)) res = FR_NO_PATH; | |
} | |
break; | |
} | |
if (ns & NS_LAST) break; /* Last segment match. Function completed. */ | |
dir = dj->dir; /* There is next segment. Follow the sub directory */ | |
if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */ | |
res = FR_NO_PATH; break; | |
} | |
dj->sclust = LD_CLUST(dir); | |
} | |
} | |
return res; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Load boot record and check if it is an FAT boot record */ | |
/*-----------------------------------------------------------------------*/ | |
static | |
BYTE check_fs ( /* 0:The FAT BR, 1:Valid BR but not an FAT, 2:Not a BR, 3:Disk error */ | |
FATFS *fs, /* File system object */ | |
DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ | |
) | |
{ | |
if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */ | |
return 3; | |
if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */ | |
return 2; | |
if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ | |
return 0; | |
if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) | |
return 0; | |
return 1; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Check if the file system object is valid or not */ | |
/*-----------------------------------------------------------------------*/ | |
static | |
FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */ | |
const TCHAR **path, /* Pointer to pointer to the path name (drive number) */ | |
FATFS **rfs, /* Pointer to pointer to the found file system object */ | |
BYTE chk_wp /* !=0: Check media write protection for write access */ | |
) | |
{ | |
BYTE fmt, b, *tbl; | |
UINT vol; | |
DSTATUS stat; | |
DWORD bsect, fasize, tsect, sysect, nclst, szbfat; | |
WORD nrsv; | |
const TCHAR *p = *path; | |
FATFS *fs; | |
/* Get logical drive number from the path name */ | |
vol = p[0] - '0'; /* Is there a drive number? */ | |
if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */ | |
p += 2; *path = p; /* Return pointer to the path name */ | |
} else { /* No drive number is given */ | |
#if _FS_RPATH | |
vol = CurrVol; /* Use current drive */ | |
#else | |
vol = 0; /* Use drive 0 */ | |
#endif | |
} | |
/* Check if the logical drive is valid or not */ | |
if (vol >= _VOLUMES) /* Is the drive number valid? */ | |
return FR_INVALID_DRIVE; | |
*rfs = fs = FatFs[vol]; /* Return pointer to the corresponding file system object */ | |
if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ | |
ENTER_FF(fs); /* Lock file system */ | |
if (fs->fs_type) { /* If the logical drive has been mounted */ | |
stat = disk_status(fs->drv); | |
if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */ | |
#if !_FS_READONLY | |
if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */ | |
return FR_WRITE_PROTECTED; | |
#endif | |
return FR_OK; /* The file system object is valid */ | |
} | |
} | |
/* The logical drive must be mounted. */ | |
/* Following code attempts to mount a volume. (analyze BPB and initialize the fs object) */ | |
fs->fs_type = 0; /* Clear the file system object */ | |
fs->drv = (BYTE)LD2PD(vol); /* Bind the logical drive and a physical drive */ | |
stat = disk_initialize(fs->drv); /* Initialize low level disk I/O layer */ | |
if (stat & STA_NOINIT) /* Check if the initialization succeeded */ | |
return FR_NOT_READY; /* Failed to initialize due to no media or hard error */ | |
#if _MAX_SS != 512 /* Get disk sector size (variable sector size cfg only) */ | |
if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK) | |
return FR_DISK_ERR; | |
#endif | |
#if !_FS_READONLY | |
if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */ | |
return FR_WRITE_PROTECTED; | |
#endif | |
/* Search FAT partition on the drive. Supports only generic partitionings, FDISK and SFD. */ | |
fmt = check_fs(fs, bsect = 0); /* Check sector 0 if it is a VBR */ | |
if (fmt == 1) { /* Not an FAT-VBR, the disk may be partitioned */ | |
/* Check the partition listed in top of the partition table */ | |
tbl = &fs->win[MBR_Table + LD2PT(vol) * SZ_PTE];/* Partition table */ | |
if (tbl[4]) { /* Is the partition existing? */ | |
bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */ | |
fmt = check_fs(fs, bsect); /* Check the partition */ | |
} | |
} | |
if (fmt == 3) return FR_DISK_ERR; | |
if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */ | |
/* Following code initializes the file system object */ | |
if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */ | |
return FR_NO_FILESYSTEM; | |
fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */ | |
if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32); | |
fs->fsize = fasize; | |
fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */ | |
if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ | |
fasize *= b; /* Number of sectors for FAT area */ | |
fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ | |
if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ | |
fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */ | |
if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */ | |
tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */ | |
if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32); | |
nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */ | |
if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */ | |
/* Determine the FAT sub type */ | |
sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */ | |
if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ | |
nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ | |
if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ | |
fmt = FS_FAT12; | |
if (nclst >= MIN_FAT16) fmt = FS_FAT16; | |
if (nclst >= MIN_FAT32) fmt = FS_FAT32; | |
/* Boundaries and Limits */ | |
fs->n_fatent = nclst + 2; /* Number of FAT entries */ | |
fs->database = bsect + sysect; /* Data start sector */ | |
fs->fatbase = bsect + nrsv; /* FAT start sector */ | |
if (fmt == FS_FAT32) { | |
if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ | |
fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */ | |
szbfat = fs->n_fatent * 4; /* (Required FAT size) */ | |
} else { | |
if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ | |
fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ | |
szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */ | |
fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); | |
} | |
if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than required) */ | |
return FR_NO_FILESYSTEM; | |
#if !_FS_READONLY | |
/* Initialize cluster allocation information */ | |
fs->free_clust = 0xFFFFFFFF; | |
fs->last_clust = 0; | |
/* Get fsinfo if available */ | |
if (fmt == FS_FAT32) { | |
fs->fsi_flag = 0; | |
fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo); | |
if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK && | |
LD_WORD(fs->win+BS_55AA) == 0xAA55 && | |
LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 && | |
LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) { | |
fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free); | |
fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count); | |
} | |
} | |
#endif | |
fs->fs_type = fmt; /* FAT sub-type */ | |
fs->id = ++Fsid; /* File system mount ID */ | |
fs->winsect = 0; /* Invalidate sector cache */ | |
fs->wflag = 0; | |
#if _FS_RPATH | |
fs->cdir = 0; /* Current directory (root dir) */ | |
#endif | |
#if _FS_SHARE /* Clear file lock semaphores */ | |
clear_lock(fs); | |
#endif | |
return FR_OK; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Check if the file/dir object is valid or not */ | |
/*-----------------------------------------------------------------------*/ | |
static | |
FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ | |
FATFS *fs, /* Pointer to the file system object */ | |
WORD id /* Member id of the target object to be checked */ | |
) | |
{ | |
if (!fs || !fs->fs_type || fs->id != id) | |
return FR_INVALID_OBJECT; | |
ENTER_FF(fs); /* Lock file system */ | |
if (disk_status(fs->drv) & STA_NOINIT) | |
return FR_NOT_READY; | |
return FR_OK; | |
} | |
/*-------------------------------------------------------------------------- | |
Public Functions | |
--------------------------------------------------------------------------*/ | |
/*-----------------------------------------------------------------------*/ | |
/* Mount/Unmount a Logical Drive */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_mount ( | |
BYTE vol, /* Logical drive number to be mounted/unmounted */ | |
FATFS *fs /* Pointer to new file system object (NULL for unmount)*/ | |
) | |
{ | |
FATFS *rfs; | |
if (vol >= _VOLUMES) /* Check if the drive number is valid */ | |
return FR_INVALID_DRIVE; | |
rfs = FatFs[vol]; /* Get current fs object */ | |
if (rfs) { | |
#if _FS_SHARE | |
clear_lock(rfs); | |
#endif | |
#if _FS_REENTRANT /* Discard sync object of the current volume */ | |
if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR; | |
#endif | |
rfs->fs_type = 0; /* Clear old fs object */ | |
} | |
if (fs) { | |
fs->fs_type = 0; /* Clear new fs object */ | |
#if _FS_REENTRANT /* Create sync object for the new volume */ | |
if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR; | |
#endif | |
} | |
FatFs[vol] = fs; /* Register new fs object */ | |
return FR_OK; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Open or Create a File */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_open ( | |
FIL *fp, /* Pointer to the blank file object */ | |
const TCHAR *path, /* Pointer to the file name */ | |
BYTE mode /* Access mode and file open mode flags */ | |
) | |
{ | |
FRESULT res; | |
DIR dj; | |
BYTE *dir; | |
DEF_NAMEBUF; | |
fp->fs = 0; /* Clear file object */ | |
#if !_FS_READONLY | |
mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; | |
res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ)); | |
#else | |
mode &= FA_READ; | |
res = chk_mounted(&path, &dj.fs, 0); | |
#endif | |
INIT_BUF(dj); | |
if (res == FR_OK) | |
res = follow_path(&dj, path); /* Follow the file path */ | |
dir = dj.dir; | |
#if !_FS_READONLY /* R/W configuration */ | |
if (res == FR_OK) { | |
if (!dir) /* Current dir itself */ | |
res = FR_INVALID_NAME; | |
#if _FS_SHARE | |
else | |
res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); | |
#endif | |
} | |
/* Create or Open a file */ | |
if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { | |
DWORD dw, cl; | |
if (res != FR_OK) { /* No file, create new */ | |
if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ | |
#if _FS_SHARE | |
res = enq_lock(dj.fs) ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; | |
#else | |
res = dir_register(&dj); | |
#endif | |
mode |= FA_CREATE_ALWAYS; /* File is created */ | |
dir = dj.dir; /* New entry */ | |
} | |
else { /* Any object is already existing */ | |
if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ | |
res = FR_DENIED; | |
} else { | |
if (mode & FA_CREATE_NEW) /* Cannot create as new file */ | |
res = FR_EXIST; | |
} | |
} | |
if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ | |
dw = get_fattime(); /* Created time */ | |
ST_DWORD(dir+DIR_CrtTime, dw); | |
dir[DIR_Attr] = 0; /* Reset attribute */ | |
ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */ | |
cl = LD_CLUST(dir); /* Get start cluster */ | |
ST_CLUST(dir, 0); /* cluster = 0 */ | |
dj.fs->wflag = 1; | |
if (cl) { /* Remove the cluster chain if exist */ | |
dw = dj.fs->winsect; | |
res = remove_chain(dj.fs, cl); | |
if (res == FR_OK) { | |
dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ | |
res = move_window(dj.fs, dw); | |
} | |
} | |
} | |
} | |
else { /* Open an existing file */ | |
if (res == FR_OK) { /* Follow succeeded */ | |
if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ | |
res = FR_NO_FILE; | |
} else { | |
if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ | |
res = FR_DENIED; | |
} | |
} | |
} | |
if (res == FR_OK) { | |
if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ | |
mode |= FA__WRITTEN; | |
fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ | |
fp->dir_ptr = dir; | |
#if _FS_SHARE | |
fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); | |
if (!fp->lockid) res = FR_INT_ERR; | |
#endif | |
} | |
#else /* R/O configuration */ | |
if (res == FR_OK) { /* Follow succeeded */ | |
if (!dir) { /* Current dir itself */ | |
res = FR_INVALID_NAME; | |
} else { | |
if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ | |
res = FR_NO_FILE; | |
} | |
} | |
#endif | |
FREE_BUF(); | |
if (res == FR_OK) { | |
fp->flag = mode; /* File access mode */ | |
fp->sclust = LD_CLUST(dir); /* File start cluster */ | |
fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ | |
fp->fptr = 0; /* File pointer */ | |
fp->dsect = 0; | |
#if _USE_FASTSEEK | |
fp->cltbl = 0; /* Normal seek mode */ | |
#endif | |
fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */ | |
} | |
LEAVE_FF(dj.fs, res); | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Read File */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_read ( | |
FIL *fp, /* Pointer to the file object */ | |
void *buff, /* Pointer to data buffer */ | |
UINT btr, /* Number of bytes to read */ | |
UINT *br /* Pointer to number of bytes read */ | |
) | |
{ | |
FRESULT res; | |
DWORD clst, sect, remain; | |
UINT rcnt, cc; | |
BYTE csect, *rbuff = buff; | |
*br = 0; /* Initialize byte counter */ | |
res = validate(fp->fs, fp->id); /* Check validity */ | |
if (res != FR_OK) LEAVE_FF(fp->fs, res); | |
if (fp->flag & FA__ERROR) /* Aborted file? */ | |
LEAVE_FF(fp->fs, FR_INT_ERR); | |
if (!(fp->flag & FA_READ)) /* Check access mode */ | |
LEAVE_FF(fp->fs, FR_DENIED); | |
remain = fp->fsize - fp->fptr; | |
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ | |
for ( ; btr; /* Repeat until all data read */ | |
rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { | |
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ | |
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ | |
if (!csect) { /* On the cluster boundary? */ | |
if (fp->fptr == 0) { /* On the top of the file? */ | |
clst = fp->sclust; /* Follow from the origin */ | |
} else { /* Middle or end of the file */ | |
#if _USE_FASTSEEK | |
if (fp->cltbl) | |
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ | |
else | |
#endif | |
clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ | |
} | |
if (clst < 2) ABORT(fp->fs, FR_INT_ERR); | |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); | |
fp->clust = clst; /* Update current cluster */ | |
} | |
sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ | |
if (!sect) ABORT(fp->fs, FR_INT_ERR); | |
sect += csect; | |
cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ | |
if (cc) { /* Read maximum contiguous sectors directly */ | |
if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ | |
cc = fp->fs->csize - csect; | |
if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK) | |
ABORT(fp->fs, FR_DISK_ERR); | |
#if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ | |
#if _FS_TINY | |
if (fp->fs->wflag && fp->fs->winsect - sect < cc) | |
mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs)); | |
#else | |
if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) | |
mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); | |
#endif | |
#endif | |
rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ | |
continue; | |
} | |
#if !_FS_TINY | |
if (fp->dsect != sect) { /* Load data sector if not in cache */ | |
#if !_FS_READONLY | |
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ | |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) | |
ABORT(fp->fs, FR_DISK_ERR); | |
fp->flag &= ~FA__DIRTY; | |
} | |
#endif | |
if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */ | |
ABORT(fp->fs, FR_DISK_ERR); | |
} | |
#endif | |
fp->dsect = sect; | |
} | |
rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ | |
if (rcnt > btr) rcnt = btr; | |
#if _FS_TINY | |
if (move_window(fp->fs, fp->dsect)) /* Move sector window */ | |
ABORT(fp->fs, FR_DISK_ERR); | |
mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ | |
#else | |
mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ | |
#endif | |
} | |
LEAVE_FF(fp->fs, FR_OK); | |
} | |
#if !_FS_READONLY | |
/*-----------------------------------------------------------------------*/ | |
/* Write File */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_write ( | |
FIL *fp, /* Pointer to the file object */ | |
const void *buff, /* Pointer to the data to be written */ | |
UINT btw, /* Number of bytes to write */ | |
UINT *bw /* Pointer to number of bytes written */ | |
) | |
{ | |
FRESULT res; | |
DWORD clst, sect; | |
UINT wcnt, cc; | |
const BYTE *wbuff = buff; | |
BYTE csect; | |
*bw = 0; /* Initialize byte counter */ | |
res = validate(fp->fs, fp->id); /* Check validity */ | |
if (res != FR_OK) LEAVE_FF(fp->fs, res); | |
if (fp->flag & FA__ERROR) /* Aborted file? */ | |
LEAVE_FF(fp->fs, FR_INT_ERR); | |
if (!(fp->flag & FA_WRITE)) /* Check access mode */ | |
LEAVE_FF(fp->fs, FR_DENIED); | |
if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0; /* File size cannot reach 4GB */ | |
for ( ; btw; /* Repeat until all data written */ | |
wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { | |
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ | |
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ | |
if (!csect) { /* On the cluster boundary? */ | |
if (fp->fptr == 0) { /* On the top of the file? */ | |
clst = fp->sclust; /* Follow from the origin */ | |
if (clst == 0) /* When no cluster is allocated, */ | |
fp->sclust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ | |
} else { /* Middle or end of the file */ | |
#if _USE_FASTSEEK | |
if (fp->cltbl) | |
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ | |
else | |
#endif | |
clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */ | |
} | |
if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ | |
if (clst == 1) ABORT(fp->fs, FR_INT_ERR); | |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); | |
fp->clust = clst; /* Update current cluster */ | |
} | |
#if _FS_TINY | |
if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write-back sector cache */ | |
ABORT(fp->fs, FR_DISK_ERR); | |
#else | |
if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ | |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) | |
ABORT(fp->fs, FR_DISK_ERR); | |
fp->flag &= ~FA__DIRTY; | |
} | |
#endif | |
sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ | |
if (!sect) ABORT(fp->fs, FR_INT_ERR); | |
sect += csect; | |
cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ | |
if (cc) { /* Write maximum contiguous sectors directly */ | |
if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ | |
cc = fp->fs->csize - csect; | |
if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK) | |
ABORT(fp->fs, FR_DISK_ERR); | |
#if _FS_TINY | |
if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ | |
mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); | |
fp->fs->wflag = 0; | |
} | |
#else | |
if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ | |
mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); | |
fp->flag &= ~FA__DIRTY; | |
} | |
#endif | |
wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ | |
continue; | |
} | |
#if _FS_TINY | |
if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */ | |
if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR); | |
fp->fs->winsect = sect; | |
} | |
#else | |
if (fp->dsect != sect) { /* Fill sector cache with file data */ | |
if (fp->fptr < fp->fsize && | |
disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) | |
ABORT(fp->fs, FR_DISK_ERR); | |
} | |
#endif | |
fp->dsect = sect; | |
} | |
wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */ | |
if (wcnt > btw) wcnt = btw; | |
#if _FS_TINY | |
if (move_window(fp->fs, fp->dsect)) /* Move sector window */ | |
ABORT(fp->fs, FR_DISK_ERR); | |
mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ | |
fp->fs->wflag = 1; | |
#else | |
mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ | |
fp->flag |= FA__DIRTY; | |
#endif | |
} | |
if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ | |
fp->flag |= FA__WRITTEN; /* Set file change flag */ | |
LEAVE_FF(fp->fs, FR_OK); | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Synchronize the File Object */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_sync ( | |
FIL *fp /* Pointer to the file object */ | |
) | |
{ | |
FRESULT res; | |
DWORD tim; | |
BYTE *dir; | |
res = validate(fp->fs, fp->id); /* Check validity of the object */ | |
if (res == FR_OK) { | |
if (fp->flag & FA__WRITTEN) { /* Has the file been written? */ | |
#if !_FS_TINY /* Write-back dirty buffer */ | |
if (fp->flag & FA__DIRTY) { | |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) | |
LEAVE_FF(fp->fs, FR_DISK_ERR); | |
fp->flag &= ~FA__DIRTY; | |
} | |
#endif | |
/* Update the directory entry */ | |
res = move_window(fp->fs, fp->dir_sect); | |
if (res == FR_OK) { | |
dir = fp->dir_ptr; | |
dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ | |
ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */ | |
ST_CLUST(dir, fp->sclust); /* Update start cluster */ | |
tim = get_fattime(); /* Update updated time */ | |
ST_DWORD(dir+DIR_WrtTime, tim); | |
fp->flag &= ~FA__WRITTEN; | |
fp->fs->wflag = 1; | |
res = sync(fp->fs); | |
} | |
} | |
} | |
LEAVE_FF(fp->fs, res); | |
} | |
#endif /* !_FS_READONLY */ | |
/*-----------------------------------------------------------------------*/ | |
/* Close File */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_close ( | |
FIL *fp /* Pointer to the file object to be closed */ | |
) | |
{ | |
FRESULT res; | |
#if _FS_READONLY | |
FATFS *fs = fp->fs; | |
res = validate(fs, fp->id); | |
if (res == FR_OK) fp->fs = 0; /* Discard file object */ | |
LEAVE_FF(fs, res); | |
#else | |
res = f_sync(fp); /* Flush cached data */ | |
#if _FS_SHARE | |
if (res == FR_OK) { /* Decrement open counter */ | |
#if _FS_REENTRANT | |
res = validate(fp->fs, fp->id); | |
if (res == FR_OK) { | |
res = dec_lock(fp->lockid); | |
unlock_fs(fp->fs, FR_OK); | |
} | |
#else | |
res = dec_lock(fp->lockid); | |
#endif | |
} | |
#endif | |
if (res == FR_OK) fp->fs = 0; /* Discard file object */ | |
return res; | |
#endif | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Current Drive/Directory Handlings */ | |
/*-----------------------------------------------------------------------*/ | |
#if _FS_RPATH >= 1 | |
FRESULT f_chdrive ( | |
BYTE drv /* Drive number */ | |
) | |
{ | |
if (drv >= _VOLUMES) return FR_INVALID_DRIVE; | |
CurrVol = drv; | |
return FR_OK; | |
} | |
FRESULT f_chdir ( | |
const TCHAR *path /* Pointer to the directory path */ | |
) | |
{ | |
FRESULT res; | |
DIR dj; | |
DEF_NAMEBUF; | |
res = chk_mounted(&path, &dj.fs, 0); | |
if (res == FR_OK) { | |
INIT_BUF(dj); | |
res = follow_path(&dj, path); /* Follow the path */ | |
FREE_BUF(); | |
if (res == FR_OK) { /* Follow completed */ | |
if (!dj.dir) { | |
dj.fs->cdir = dj.sclust; /* Start directory itself */ | |
} else { | |
if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */ | |
dj.fs->cdir = LD_CLUST(dj.dir); | |
else | |
res = FR_NO_PATH; /* Reached but a file */ | |
} | |
} | |
if (res == FR_NO_FILE) res = FR_NO_PATH; | |
} | |
LEAVE_FF(dj.fs, res); | |
} | |
#if _FS_RPATH >= 2 | |
FRESULT f_getcwd ( | |
TCHAR *path, /* Pointer to the directory path */ | |
UINT sz_path /* Size of path */ | |
) | |
{ | |
FRESULT res; | |
DIR dj; | |
UINT i, n; | |
DWORD ccl; | |
TCHAR *tp; | |
FILINFO fno; | |
DEF_NAMEBUF; | |
*path = 0; | |
res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */ | |
if (res == FR_OK) { | |
INIT_BUF(dj); | |
i = sz_path; /* Bottom of buffer (dir stack base) */ | |
dj.sclust = dj.fs->cdir; /* Start to follow upper dir from current dir */ | |
while ((ccl = dj.sclust) != 0) { /* Repeat while current dir is a sub-dir */ | |
res = dir_sdi(&dj, 1); /* Get parent dir */ | |
if (res != FR_OK) break; | |
res = dir_read(&dj); | |
if (res != FR_OK) break; | |
dj.sclust = LD_CLUST(dj.dir); /* Goto parent dir */ | |
res = dir_sdi(&dj, 0); | |
if (res != FR_OK) break; | |
do { /* Find the entry links to the child dir */ | |
res = dir_read(&dj); | |
if (res != FR_OK) break; | |
if (ccl == LD_CLUST(dj.dir)) break; /* Found the entry */ | |
res = dir_next(&dj, 0); | |
} while (res == FR_OK); | |
if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ | |
if (res != FR_OK) break; | |
#if _USE_LFN | |
fno.lfname = path; | |
fno.lfsize = i; | |
#endif | |
get_fileinfo(&dj, &fno); /* Get the dir name and push it to the buffer */ | |
tp = fno.fname; | |
if (_USE_LFN && *path) tp = path; | |
for (n = 0; tp[n]; n++) ; | |
if (i < n + 3) { | |
res = FR_NOT_ENOUGH_CORE; break; | |
} | |
while (n) path[--i] = tp[--n]; | |
path[--i] = '/'; | |
} | |
tp = path; | |
if (res == FR_OK) { | |
*tp++ = '0' + CurrVol; /* Put drive number */ | |
*tp++ = ':'; | |
if (i == sz_path) { /* Root-dir */ | |
*tp++ = '/'; | |
} else { /* Sub-dir */ | |
do /* Add stacked path str */ | |
*tp++ = path[i++]; | |
while (i < sz_path); | |
} | |
} | |
*tp = 0; | |
FREE_BUF(); | |
} | |
LEAVE_FF(dj.fs, res); | |
} | |
#endif /* _FS_RPATH >= 2 */ | |
#endif /* _FS_RPATH >= 1 */ | |
#if _FS_MINIMIZE <= 2 | |
/*-----------------------------------------------------------------------*/ | |
/* Seek File R/W Pointer */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_lseek ( | |
FIL *fp, /* Pointer to the file object */ | |
DWORD ofs /* File pointer from top of file */ | |
) | |
{ | |
FRESULT res; | |
res = validate(fp->fs, fp->id); /* Check validity of the object */ | |
if (res != FR_OK) LEAVE_FF(fp->fs, res); | |
if (fp->flag & FA__ERROR) /* Check abort flag */ | |
LEAVE_FF(fp->fs, FR_INT_ERR); | |
#if _USE_FASTSEEK | |
if (fp->cltbl) { /* Fast seek */ | |
DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; | |
if (ofs == CREATE_LINKMAP) { /* Create CLMT */ | |
tbl = fp->cltbl; | |
tlen = *tbl++; ulen = 2; /* Given table size and required table size */ | |
cl = fp->sclust; /* Top of the chain */ | |
if (cl) { | |
do { | |
/* Get a fragment */ | |
tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ | |
do { | |
pcl = cl; ncl++; | |
cl = get_fat(fp->fs, cl); | |
if (cl <= 1) ABORT(fp->fs, FR_INT_ERR); | |
if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); | |
} while (cl == pcl + 1); | |
if (ulen <= tlen) { /* Store the length and top of the fragment */ | |
*tbl++ = ncl; *tbl++ = tcl; | |
} | |
} while (cl < fp->fs->n_fatent); /* Repeat until end of chain */ | |
} | |
*fp->cltbl = ulen; /* Number of items used */ | |
if (ulen <= tlen) | |
*tbl = 0; /* Terminate table */ | |
else | |
res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ | |
} else { /* Fast seek */ | |
if (ofs > fp->fsize) /* Clip offset at the file size */ | |
ofs = fp->fsize; | |
fp->fptr = ofs; /* Set file pointer */ | |
if (ofs) { | |
fp->clust = clmt_clust(fp, ofs - 1); | |
dsc = clust2sect(fp->fs, fp->clust); | |
if (!dsc) ABORT(fp->fs, FR_INT_ERR); | |
dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1); | |
if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */ | |
#if !_FS_TINY | |
#if !_FS_READONLY | |
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ | |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) | |
ABORT(fp->fs, FR_DISK_ERR); | |
fp->flag &= ~FA__DIRTY; | |
} | |
#endif | |
if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */ | |
ABORT(fp->fs, FR_DISK_ERR); | |
#endif | |
fp->dsect = dsc; | |
} | |
} | |
} | |
} else | |
#endif | |
/* Normal Seek */ | |
{ | |
DWORD clst, bcs, nsect, ifptr; | |
if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ | |
#if !_FS_READONLY | |
&& !(fp->flag & FA_WRITE) | |
#endif | |
) ofs = fp->fsize; | |
ifptr = fp->fptr; | |
fp->fptr = nsect = 0; | |
if (ofs) { | |
bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ | |
if (ifptr > 0 && | |
(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ | |
fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ | |
ofs -= fp->fptr; | |
clst = fp->clust; | |
} else { /* When seek to back cluster, */ | |
clst = fp->sclust; /* start from the first cluster */ | |
#if !_FS_READONLY | |
if (clst == 0) { /* If no cluster chain, create a new chain */ | |
clst = create_chain(fp->fs, 0); | |
if (clst == 1) ABORT(fp->fs, FR_INT_ERR); | |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); | |
fp->sclust = clst; | |
} | |
#endif | |
fp->clust = clst; | |
} | |
if (clst != 0) { | |
while (ofs > bcs) { /* Cluster following loop */ | |
#if !_FS_READONLY | |
if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ | |
clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */ | |
if (clst == 0) { /* When disk gets full, clip file size */ | |
ofs = bcs; break; | |
} | |
} else | |
#endif | |
clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ | |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); | |
if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR); | |
fp->clust = clst; | |
fp->fptr += bcs; | |
ofs -= bcs; | |
} | |
fp->fptr += ofs; | |
if (ofs % SS(fp->fs)) { | |
nsect = clust2sect(fp->fs, clst); /* Current sector */ | |
if (!nsect) ABORT(fp->fs, FR_INT_ERR); | |
nsect += ofs / SS(fp->fs); | |
} | |
} | |
} | |
if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ | |
#if !_FS_TINY | |
#if !_FS_READONLY | |
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ | |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) | |
ABORT(fp->fs, FR_DISK_ERR); | |
fp->flag &= ~FA__DIRTY; | |
} | |
#endif | |
if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */ | |
ABORT(fp->fs, FR_DISK_ERR); | |
#endif | |
fp->dsect = nsect; | |
} | |
#if !_FS_READONLY | |
if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ | |
fp->fsize = fp->fptr; | |
fp->flag |= FA__WRITTEN; | |
} | |
#endif | |
} | |
LEAVE_FF(fp->fs, res); | |
} | |
#if _FS_MINIMIZE <= 1 | |
/*-----------------------------------------------------------------------*/ | |
/* Create a Directroy Object */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_opendir ( | |
DIR *dj, /* Pointer to directory object to create */ | |
const TCHAR *path /* Pointer to the directory path */ | |
) | |
{ | |
FRESULT res; | |
DEF_NAMEBUF; | |
res = chk_mounted(&path, &dj->fs, 0); | |
if (res == FR_OK) { | |
INIT_BUF(*dj); | |
res = follow_path(dj, path); /* Follow the path to the directory */ | |
FREE_BUF(); | |
if (res == FR_OK) { /* Follow completed */ | |
if (dj->dir) { /* It is not the root dir */ | |
if (dj->dir[DIR_Attr] & AM_DIR) { /* The object is a directory */ | |
dj->sclust = LD_CLUST(dj->dir); | |
} else { /* The object is not a directory */ | |
res = FR_NO_PATH; | |
} | |
} | |
if (res == FR_OK) { | |
dj->id = dj->fs->id; | |
res = dir_sdi(dj, 0); /* Rewind dir */ | |
} | |
} | |
if (res == FR_NO_FILE) res = FR_NO_PATH; | |
} | |
LEAVE_FF(dj->fs, res); | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Read Directory Entry in Sequense */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_readdir ( | |
DIR *dj, /* Pointer to the open directory object */ | |
FILINFO *fno /* Pointer to file information to return */ | |
) | |
{ | |
FRESULT res; | |
DEF_NAMEBUF; | |
res = validate(dj->fs, dj->id); /* Check validity of the object */ | |
if (res == FR_OK) { | |
if( dj->sect == 0) res = FR_NO_FILE; | |
else if (!fno) { | |
res = dir_sdi(dj, 0); /* Rewind the directory object */ | |
} else { | |
INIT_BUF(*dj); | |
res = dir_read(dj); /* Read an directory item */ | |
if (res == FR_NO_FILE) { /* Reached end of dir */ | |
dj->sect = 0; | |
res = FR_NO_FILE; | |
} | |
if (res == FR_OK) { /* A valid entry is found */ | |
get_fileinfo(dj, fno); /* Get the object information */ | |
res = dir_next(dj, 0); /* Increment index for next */ | |
if (res == FR_NO_FILE) { | |
dj->sect = 0; | |
res = FR_OK; | |
} | |
} | |
FREE_BUF(); | |
} | |
} | |
LEAVE_FF(dj->fs, res); | |
} | |
#if _FS_MINIMIZE == 0 | |
/*-----------------------------------------------------------------------*/ | |
/* Get File Status */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_stat ( | |
const TCHAR *path, /* Pointer to the file path */ | |
FILINFO *fno /* Pointer to file information to return */ | |
) | |
{ | |
FRESULT res; | |
DIR dj; | |
DEF_NAMEBUF; | |
res = chk_mounted(&path, &dj.fs, 0); | |
if (res == FR_OK) { | |
INIT_BUF(dj); | |
res = follow_path(&dj, path); /* Follow the file path */ | |
if (res == FR_OK) { /* Follow completed */ | |
if (dj.dir) /* Found an object */ | |
get_fileinfo(&dj, fno); | |
else /* It is root dir */ | |
res = FR_INVALID_NAME; | |
} | |
FREE_BUF(); | |
} | |
LEAVE_FF(dj.fs, res); | |
} | |
#if !_FS_READONLY | |
/*-----------------------------------------------------------------------*/ | |
/* Get Number of Free Clusters */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_getfree ( | |
const TCHAR *path, /* Pointer to the logical drive number (root dir) */ | |
DWORD *nclst, /* Pointer to the variable to return number of free clusters */ | |
FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */ | |
) | |
{ | |
FRESULT res; | |
DWORD n, clst, sect, stat; | |
UINT i; | |
BYTE fat, *p; | |
/* Get drive number */ | |
res = chk_mounted(&path, fatfs, 0); | |
if (res == FR_OK) { | |
/* If free_clust is valid, return it without full cluster scan */ | |
if ((*fatfs)->free_clust <= (*fatfs)->n_fatent - 2) { | |
*nclst = (*fatfs)->free_clust; | |
} else { | |
/* Get number of free clusters */ | |
fat = (*fatfs)->fs_type; | |
n = 0; | |
if (fat == FS_FAT12) { | |
clst = 2; | |
do { | |
stat = get_fat(*fatfs, clst); | |
if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } | |
if (stat == 1) { res = FR_INT_ERR; break; } | |
if (stat == 0) n++; | |
} while (++clst < (*fatfs)->n_fatent); | |
} else { | |
clst = (*fatfs)->n_fatent; | |
sect = (*fatfs)->fatbase; | |
i = 0; p = 0; | |
do { | |
if (!i) { | |
res = move_window(*fatfs, sect++); | |
if (res != FR_OK) break; | |
p = (*fatfs)->win; | |
i = SS(*fatfs); | |
} | |
if (fat == FS_FAT16) { | |
if (LD_WORD(p) == 0) n++; | |
p += 2; i -= 2; | |
} else { | |
if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++; | |
p += 4; i -= 4; | |
} | |
} while (--clst); | |
} | |
(*fatfs)->free_clust = n; | |
if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1; | |
*nclst = n; | |
} | |
} | |
LEAVE_FF(*fatfs, res); | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Truncate File */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_truncate ( | |
FIL *fp /* Pointer to the file object */ | |
) | |
{ | |
FRESULT res; | |
DWORD ncl; | |
res = validate(fp->fs, fp->id); /* Check validity of the object */ | |
if (res == FR_OK) { | |
if (fp->flag & FA__ERROR) { /* Check abort flag */ | |
res = FR_INT_ERR; | |
} else { | |
if (!(fp->flag & FA_WRITE)) /* Check access mode */ | |
res = FR_DENIED; | |
} | |
} | |
if (res == FR_OK) { | |
if (fp->fsize > fp->fptr) { | |
fp->fsize = fp->fptr; /* Set file size to current R/W point */ | |
fp->flag |= FA__WRITTEN; | |
if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ | |
res = remove_chain(fp->fs, fp->sclust); | |
fp->sclust = 0; | |
} else { /* When truncate a part of the file, remove remaining clusters */ | |
ncl = get_fat(fp->fs, fp->clust); | |
res = FR_OK; | |
if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; | |
if (ncl == 1) res = FR_INT_ERR; | |
if (res == FR_OK && ncl < fp->fs->n_fatent) { | |
res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); | |
if (res == FR_OK) res = remove_chain(fp->fs, ncl); | |
} | |
} | |
} | |
if (res != FR_OK) fp->flag |= FA__ERROR; | |
} | |
LEAVE_FF(fp->fs, res); | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Delete a File or Directory */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_unlink ( | |
const TCHAR *path /* Pointer to the file or directory path */ | |
) | |
{ | |
FRESULT res; | |
DIR dj, sdj; | |
BYTE *dir; | |
DWORD dclst; | |
DEF_NAMEBUF; | |
res = chk_mounted(&path, &dj.fs, 1); | |
if (res == FR_OK) { | |
INIT_BUF(dj); | |
res = follow_path(&dj, path); /* Follow the file path */ | |
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) | |
res = FR_INVALID_NAME; /* Cannot remove dot entry */ | |
#if _FS_SHARE | |
if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */ | |
#endif | |
if (res == FR_OK) { /* The object is accessible */ | |
dir = dj.dir; | |
if (!dir) { | |
res = FR_INVALID_NAME; /* Cannot remove the start directory */ | |
} else { | |
if (dir[DIR_Attr] & AM_RDO) | |
res = FR_DENIED; /* Cannot remove R/O object */ | |
} | |
dclst = LD_CLUST(dir); | |
if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */ | |
if (dclst < 2) { | |
res = FR_INT_ERR; | |
} else { | |
mem_cpy(&sdj, &dj, sizeof(DIR)); /* Check if the sub-dir is empty or not */ | |
sdj.sclust = dclst; | |
res = dir_sdi(&sdj, 2); /* Exclude dot entries */ | |
if (res == FR_OK) { | |
res = dir_read(&sdj); | |
if (res == FR_OK /* Not empty dir */ | |
#if _FS_RPATH | |
|| dclst == sdj.fs->cdir /* Current dir */ | |
#endif | |
) res = FR_DENIED; | |
if (res == FR_NO_FILE) res = FR_OK; /* Empty */ | |
} | |
} | |
} | |
if (res == FR_OK) { | |
res = dir_remove(&dj); /* Remove the directory entry */ | |
if (res == FR_OK) { | |
if (dclst) /* Remove the cluster chain if exist */ | |
res = remove_chain(dj.fs, dclst); | |
if (res == FR_OK) res = sync(dj.fs); | |
} | |
} | |
} | |
FREE_BUF(); | |
} | |
LEAVE_FF(dj.fs, res); | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Create a Directory */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_mkdir ( | |
const TCHAR *path /* Pointer to the directory path */ | |
) | |
{ | |
FRESULT res; | |
DIR dj; | |
BYTE *dir, n; | |
DWORD dsc, dcl, pcl, tim = get_fattime(); | |
DEF_NAMEBUF; | |
res = chk_mounted(&path, &dj.fs, 1); | |
if (res == FR_OK) { | |
INIT_BUF(dj); | |
res = follow_path(&dj, path); /* Follow the file path */ | |
if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ | |
if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT)) | |
res = FR_INVALID_NAME; | |
if (res == FR_NO_FILE) { /* Can create a new directory */ | |
dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ | |
res = FR_OK; | |
if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ | |
if (dcl == 1) res = FR_INT_ERR; | |
if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; | |
if (res == FR_OK) /* Flush FAT */ | |
res = move_window(dj.fs, 0); | |
if (res == FR_OK) { /* Initialize the new directory table */ | |
dsc = clust2sect(dj.fs, dcl); | |
dir = dj.fs->win; | |
mem_set(dir, 0, SS(dj.fs)); | |
mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */ | |
dir[DIR_Name] = '.'; | |
dir[DIR_Attr] = AM_DIR; | |
ST_DWORD(dir+DIR_WrtTime, tim); | |
ST_CLUST(dir, dcl); | |
mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */ | |
dir[33] = '.'; pcl = dj.sclust; | |
if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) | |
pcl = 0; | |
ST_CLUST(dir+SZ_DIR, pcl); | |
for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ | |
dj.fs->winsect = dsc++; | |
dj.fs->wflag = 1; | |
res = move_window(dj.fs, 0); | |
if (res != FR_OK) break; | |
mem_set(dir, 0, SS(dj.fs)); | |
} | |
} | |
if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ | |
if (res != FR_OK) { | |
remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ | |
} else { | |
dir = dj.dir; | |
dir[DIR_Attr] = AM_DIR; /* Attribute */ | |
ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */ | |
ST_CLUST(dir, dcl); /* Table start cluster */ | |
dj.fs->wflag = 1; | |
res = sync(dj.fs); | |
} | |
} | |
FREE_BUF(); | |
} | |
LEAVE_FF(dj.fs, res); | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Change Attribute */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_chmod ( | |
const TCHAR *path, /* Pointer to the file path */ | |
BYTE value, /* Attribute bits */ | |
BYTE mask /* Attribute mask to change */ | |
) | |
{ | |
FRESULT res; | |
DIR dj; | |
BYTE *dir; | |
DEF_NAMEBUF; | |
res = chk_mounted(&path, &dj.fs, 1); | |
if (res == FR_OK) { | |
INIT_BUF(dj); | |
res = follow_path(&dj, path); /* Follow the file path */ | |
FREE_BUF(); | |
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) | |
res = FR_INVALID_NAME; | |
if (res == FR_OK) { | |
dir = dj.dir; | |
if (!dir) { /* Is it a root directory? */ | |
res = FR_INVALID_NAME; | |
} else { /* File or sub directory */ | |
mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ | |
dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ | |
dj.fs->wflag = 1; | |
res = sync(dj.fs); | |
} | |
} | |
} | |
LEAVE_FF(dj.fs, res); | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Change Timestamp */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_utime ( | |
const TCHAR *path, /* Pointer to the file/directory name */ | |
const FILINFO *fno /* Pointer to the time stamp to be set */ | |
) | |
{ | |
FRESULT res; | |
DIR dj; | |
BYTE *dir; | |
DEF_NAMEBUF; | |
res = chk_mounted(&path, &dj.fs, 1); | |
if (res == FR_OK) { | |
INIT_BUF(dj); | |
res = follow_path(&dj, path); /* Follow the file path */ | |
FREE_BUF(); | |
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) | |
res = FR_INVALID_NAME; | |
if (res == FR_OK) { | |
dir = dj.dir; | |
if (!dir) { /* Root directory */ | |
res = FR_INVALID_NAME; | |
} else { /* File or sub-directory */ | |
ST_WORD(dir+DIR_WrtTime, fno->ftime); | |
ST_WORD(dir+DIR_WrtDate, fno->fdate); | |
dj.fs->wflag = 1; | |
res = sync(dj.fs); | |
} | |
} | |
} | |
LEAVE_FF(dj.fs, res); | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Rename File/Directory */ | |
/*-----------------------------------------------------------------------*/ | |
FRESULT f_rename ( | |
const TCHAR *path_old, /* Pointer to the old name */ | |
const TCHAR *path_new /* Pointer to the new name */ | |
) | |
{ | |
FRESULT res; | |
DIR djo, djn; | |
BYTE buf[21], *dir; | |
DWORD dw; | |
DEF_NAMEBUF; | |
res = chk_mounted(&path_old, &djo.fs, 1); | |
if (res == FR_OK) { | |
djn.fs = djo.fs; | |
INIT_BUF(djo); | |
res = follow_path(&djo, path_old); /* Check old object */ | |
if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT)) | |
res = FR_INVALID_NAME; | |
#if _FS_SHARE | |
if (res == FR_OK) res = chk_lock(&djo, 2); | |
#endif | |
if (res == FR_OK) { /* Old object is found */ | |
if (!djo.dir) { /* Is root dir? */ | |
res = FR_NO_FILE; | |
} else { | |
mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */ | |
mem_cpy(&djn, &djo, sizeof(DIR)); /* Check new object */ | |
res = follow_path(&djn, path_new); | |
if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ | |
if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */ | |
/* Start critical section that any interruption or error can cause cross-link */ | |
res = dir_register(&djn); /* Register the new entry */ | |
if (res == FR_OK) { | |
dir = djn.dir; /* Copy object information except for name */ | |
mem_cpy(dir+13, buf+2, 19); | |
dir[DIR_Attr] = buf[0] | AM_ARC; | |
djo.fs->wflag = 1; | |
if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */ | |
dw = clust2sect(djn.fs, LD_CLUST(dir)); | |
if (!dw) { | |
res = FR_INT_ERR; | |
} else { | |
res = move_window(djn.fs, dw); | |
dir = djn.fs->win+SZ_DIR; /* .. entry */ | |
if (res == FR_OK && dir[1] == '.') { | |
dw = (djn.fs->fs_type == FS_FAT32 && djn.sclust == djn.fs->dirbase) ? 0 : djn.sclust; | |
ST_CLUST(dir, dw); | |
djn.fs->wflag = 1; | |
} | |
} | |
} | |
if (res == FR_OK) { | |
res = dir_remove(&djo); /* Remove old entry */ | |
if (res == FR_OK) | |
res = sync(djo.fs); | |
} | |
} | |
/* End critical section */ | |
} | |
} | |
} | |
FREE_BUF(); | |
} | |
LEAVE_FF(djo.fs, res); | |
} | |
#endif /* !_FS_READONLY */ | |
#endif /* _FS_MINIMIZE == 0 */ | |
#endif /* _FS_MINIMIZE <= 1 */ | |
#endif /* _FS_MINIMIZE <= 2 */ | |
/*-----------------------------------------------------------------------*/ | |
/* Forward data to the stream directly (available on only tiny cfg) */ | |
/*-----------------------------------------------------------------------*/ | |
#if _USE_FORWARD && _FS_TINY | |
FRESULT f_forward ( | |
FIL *fp, /* Pointer to the file object */ | |
UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ | |
UINT btr, /* Number of bytes to forward */ | |
UINT *bf /* Pointer to number of bytes forwarded */ | |
) | |
{ | |
FRESULT res; | |
DWORD remain, clst, sect; | |
UINT rcnt; | |
BYTE csect; | |
*bf = 0; /* Initialize byte counter */ | |
res = validate(fp->fs, fp->id); /* Check validity of the object */ | |
if (res != FR_OK) LEAVE_FF(fp->fs, res); | |
if (fp->flag & FA__ERROR) /* Check error flag */ | |
LEAVE_FF(fp->fs, FR_INT_ERR); | |
if (!(fp->flag & FA_READ)) /* Check access mode */ | |
LEAVE_FF(fp->fs, FR_DENIED); | |
remain = fp->fsize - fp->fptr; | |
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ | |
for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ | |
fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) { | |
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ | |
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ | |
if (!csect) { /* On the cluster boundary? */ | |
clst = (fp->fptr == 0) ? /* On the top of the file? */ | |
fp->sclust : get_fat(fp->fs, fp->clust); | |
if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); | |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); | |
fp->clust = clst; /* Update current cluster */ | |
} | |
} | |
sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */ | |
if (!sect) ABORT(fp->fs, FR_INT_ERR); | |
sect += csect; | |
if (move_window(fp->fs, sect)) /* Move sector window */ | |
ABORT(fp->fs, FR_DISK_ERR); | |
fp->dsect = sect; | |
rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ | |
if (rcnt > btr) rcnt = btr; | |
rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt); | |
if (!rcnt) ABORT(fp->fs, FR_INT_ERR); | |
} | |
LEAVE_FF(fp->fs, FR_OK); | |
} | |
#endif /* _USE_FORWARD */ | |
#if _USE_MKFS && !_FS_READONLY | |
/*-----------------------------------------------------------------------*/ | |
/* Create File System on the Drive */ | |
/*-----------------------------------------------------------------------*/ | |
#define N_ROOTDIR 512 /* Number of root dir entries for FAT12/16 */ | |
#define N_FATS 1 /* Number of FAT copies (1 or 2) */ | |
FRESULT f_mkfs ( | |
BYTE drv, /* Logical drive number */ | |
BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */ | |
UINT au /* Allocation unit size [bytes] */ | |
) | |
{ | |
static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0}; | |
static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512}; | |
BYTE fmt, md, *tbl; | |
DWORD n_clst, vs, n, wsect; | |
UINT i; | |
DWORD b_vol, b_fat, b_dir, b_data; /* Offset (LBA) */ | |
DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */ | |
FATFS *fs; | |
DSTATUS stat; | |
/* Check mounted drive and clear work area */ | |
if (drv >= _VOLUMES) return FR_INVALID_DRIVE; | |
fs = FatFs[drv]; | |
if (!fs) return FR_NOT_ENABLED; | |
fs->fs_type = 0; | |
drv = LD2PD(drv); | |
/* Get disk statics */ | |
stat = disk_initialize(drv); | |
if (stat & STA_NOINIT) return FR_NOT_READY; | |
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; | |
#if _MAX_SS != 512 /* Get disk sector size */ | |
if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) | |
return FR_DISK_ERR; | |
#endif | |
if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128) | |
return FR_DISK_ERR; | |
b_vol = (sfd) ? 0 : 63; /* Volume start sector */ | |
n_vol -= b_vol; | |
if (au & (au - 1)) au = 0; /* Check validity of the AU size */ | |
if (!au) { /* AU auto selection */ | |
vs = n_vol / (2000 / (SS(fs) / 512)); | |
for (i = 0; vs < vst[i]; i++) ; | |
au = cst[i]; | |
} | |
au /= SS(fs); /* Number of sectors per cluster */ | |
if (au == 0) au = 1; | |
if (au > 128) au = 128; | |
/* Pre-compute number of clusters and FAT syb-type */ | |
n_clst = n_vol / au; | |
fmt = FS_FAT12; | |
if (n_clst >= MIN_FAT16) fmt = FS_FAT16; | |
if (n_clst >= MIN_FAT32) fmt = FS_FAT32; | |
/* Determine offset and size of FAT structure */ | |
if (fmt == FS_FAT32) { | |
n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); | |
n_rsv = 32; | |
n_dir = 0; | |
} else { | |
n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4; | |
n_fat = (n_fat + SS(fs) - 1) / SS(fs); | |
n_rsv = 1; | |
n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs); | |
} | |
b_fat = b_vol + n_rsv; /* FAT area start sector */ | |
b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */ | |
b_data = b_dir + n_dir; /* Data area start sector */ | |
if (n_vol < b_data + au) return FR_MKFS_ABORTED; /* Too small volume */ | |
/* Align data start sector to erase block boundary (for flash memory media) */ | |
if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1; | |
n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */ | |
n = (n - b_data) / N_FATS; | |
if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */ | |
n_rsv += n; | |
b_fat += n; | |
} else { /* FAT12/16: Expand FAT size */ | |
n_fat += n; | |
} | |
/* Determine number of clusters and final check of validity of the FAT sub-type */ | |
n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au; | |
if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16) | |
|| (fmt == FS_FAT32 && n_clst < MIN_FAT32)) | |
return FR_MKFS_ABORTED; | |
/* Create partition table if required */ | |
if (sfd) { /* No patition table (SFD) */ | |
md = 0xF0; | |
} else { /* With patition table (FDISK) */ | |
DWORD n_disk = b_vol + n_vol; | |
mem_set(fs->win, 0, SS(fs)); | |
tbl = fs->win+MBR_Table; | |
ST_DWORD(tbl, 0x00010180); /* Partition start in CHS */ | |
if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */ | |
n_disk = n_disk / 63 / 255; | |
tbl[7] = (BYTE)n_disk; | |
tbl[6] = (BYTE)((n_disk >> 2) | 63); | |
} else { | |
ST_WORD(&tbl[6], 0xFFFF); /* CHS saturated */ | |
} | |
tbl[5] = 254; | |
if (fmt != FS_FAT32) /* System ID */ | |
tbl[4] = (n_vol < 0x10000) ? 0x04 : 0x06; | |
else | |
tbl[4] = 0x0c; | |
ST_DWORD(tbl+8, 63); /* Partition start in LBA */ | |
ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */ | |
ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */ | |
if (disk_write(drv, fs->win, 0, 1) != RES_OK) /* Put the MBR into first physical sector */ | |
return FR_DISK_ERR; | |
md = 0xF8; | |
} | |
/* Create volume boot record */ | |
tbl = fs->win; /* Clear sector */ | |
mem_set(tbl, 0, SS(fs)); | |
mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */ | |
i = SS(fs); /* Sector size */ | |
ST_WORD(tbl+BPB_BytsPerSec, i); | |
tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */ | |
ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ | |
tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ | |
i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */ | |
ST_WORD(tbl+BPB_RootEntCnt, i); | |
if (n_vol < 0x10000) { /* Number of total sectors */ | |
ST_WORD(tbl+BPB_TotSec16, n_vol); | |
} else { | |
ST_DWORD(tbl+BPB_TotSec32, n_vol); | |
} | |
tbl[BPB_Media] = md; /* Media descriptor */ | |
ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */ | |
ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */ | |
ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */ | |
n = get_fattime(); /* Use current time as VSN */ | |
if (fmt == FS_FAT32) { | |
ST_DWORD(tbl+BS_VolID32, n); /* VSN */ | |
ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */ | |
ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */ | |
ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */ | |
ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */ | |
tbl[BS_DrvNum32] = 0x80; /* Drive number */ | |
tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ | |
mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ | |
} else { | |
ST_DWORD(tbl+BS_VolID, n); /* VSN */ | |
ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */ | |
tbl[BS_DrvNum] = 0x80; /* Drive number */ | |
tbl[BS_BootSig] = 0x29; /* Extended boot signature */ | |
mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ | |
} | |
ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */ | |
if (disk_write(drv, tbl, b_vol, 1) != RES_OK) /* Write VBR */ | |
return FR_DISK_ERR; | |
if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */ | |
disk_write(drv, tbl, b_vol + 6, 1); | |
/* Initialize FAT area */ | |
wsect = b_fat; | |
for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */ | |
mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ | |
n = md; /* Media descriptor byte */ | |
if (fmt != FS_FAT32) { | |
n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; | |
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */ | |
} else { | |
n |= 0xFFFFFF00; | |
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */ | |
ST_DWORD(tbl+4, 0xFFFFFFFF); | |
ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */ | |
} | |
if (disk_write(drv, tbl, wsect++, 1) != RES_OK) | |
return FR_DISK_ERR; | |
mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */ | |
for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */ | |
if (disk_write(drv, tbl, wsect++, 1) != RES_OK) | |
return FR_DISK_ERR; | |
} | |
} | |
/* Initialize root directory */ | |
i = (fmt == FS_FAT32) ? au : n_dir; | |
do { | |
if (disk_write(drv, tbl, wsect++, 1) != RES_OK) | |
return FR_DISK_ERR; | |
} while (--i); | |
#if _USE_ERASE /* Erase data area if needed */ | |
{ | |
DWORD eb[2]; | |
eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1; | |
disk_ioctl(drv, CTRL_ERASE_SECTOR, eb); | |
} | |
#endif | |
/* Create FSInfo if needed */ | |
if (fmt == FS_FAT32) { | |
ST_DWORD(tbl+FSI_LeadSig, 0x41615252); | |
ST_DWORD(tbl+FSI_StrucSig, 0x61417272); | |
ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */ | |
ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */ | |
ST_WORD(tbl+BS_55AA, 0xAA55); | |
disk_write(drv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */ | |
disk_write(drv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */ | |
} | |
return (disk_ioctl(drv, CTRL_SYNC, (void*)0) == RES_OK) ? FR_OK : FR_DISK_ERR; | |
} | |
#endif /* _USE_MKFS && !_FS_READONLY */ | |
#if _USE_STRFUNC | |
/*-----------------------------------------------------------------------*/ | |
/* Get a string from the file */ | |
/*-----------------------------------------------------------------------*/ | |
TCHAR* f_gets ( | |
TCHAR* buff, /* Pointer to the string buffer to read */ | |
int len, /* Size of string buffer (characters) */ | |
FIL* fil /* Pointer to the file object */ | |
) | |
{ | |
int n = 0; | |
TCHAR c, *p = buff; | |
BYTE s[2]; | |
UINT rc; | |
while (n < len - 1) { /* Read bytes until buffer gets filled */ | |
f_read(fil, s, 1, &rc); | |
if (rc != 1) break; /* Break on EOF or error */ | |
c = s[0]; | |
#if _LFN_UNICODE /* Read a character in UTF-8 encoding */ | |
if (c >= 0x80) { | |
if (c < 0xC0) continue; /* Skip stray trailer */ | |
if (c < 0xE0) { /* Two-byte sequense */ | |
f_read(fil, s, 1, &rc); | |
if (rc != 1) break; | |
c = ((c & 0x1F) << 6) | (s[0] & 0x3F); | |
if (c < 0x80) c = '?'; | |
} else { | |
if (c < 0xF0) { /* Three-byte sequense */ | |
f_read(fil, s, 2, &rc); | |
if (rc != 2) break; | |
c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F); | |
if (c < 0x800) c = '?'; | |
} else { /* Reject four-byte sequense */ | |
c = '?'; | |
} | |
} | |
} | |
#endif | |
#if _USE_STRFUNC >= 2 | |
if (c == '\r') continue; /* Strip '\r' */ | |
#endif | |
*p++ = c; | |
n++; | |
if (c == '\n') break; /* Break on EOL */ | |
} | |
*p = 0; | |
return n ? buff : 0; /* When no data read (eof or error), return with error. */ | |
} | |
#if !_FS_READONLY | |
#include <stdarg.h> | |
/*-----------------------------------------------------------------------*/ | |
/* Put a character to the file */ | |
/*-----------------------------------------------------------------------*/ | |
int f_putc ( | |
TCHAR c, /* A character to be output */ | |
FIL* fil /* Pointer to the file object */ | |
) | |
{ | |
UINT bw, btw; | |
BYTE s[3]; | |
#if _USE_STRFUNC >= 2 | |
if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */ | |
#endif | |
#if _LFN_UNICODE /* Write the character in UTF-8 encoding */ | |
if (c < 0x80) { /* 7-bit */ | |
s[0] = (BYTE)c; | |
btw = 1; | |
} else { | |
if (c < 0x800) { /* 11-bit */ | |
s[0] = (BYTE)(0xC0 | (c >> 6)); | |
s[1] = (BYTE)(0x80 | (c & 0x3F)); | |
btw = 2; | |
} else { /* 16-bit */ | |
s[0] = (BYTE)(0xE0 | (c >> 12)); | |
s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F)); | |
s[2] = (BYTE)(0x80 | (c & 0x3F)); | |
btw = 3; | |
} | |
} | |
#else /* Write the character without conversion */ | |
s[0] = (BYTE)c; | |
btw = 1; | |
#endif | |
f_write(fil, s, btw, &bw); /* Write the char to the file */ | |
return (bw == btw) ? 1 : EOF; /* Return the result */ | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Put a string to the file */ | |
/*-----------------------------------------------------------------------*/ | |
int f_puts ( | |
const TCHAR* str, /* Pointer to the string to be output */ | |
FIL* fil /* Pointer to the file object */ | |
) | |
{ | |
int n; | |
for (n = 0; *str; str++, n++) { | |
if (f_putc(*str, fil) == EOF) return EOF; | |
} | |
return n; | |
} | |
/*-----------------------------------------------------------------------*/ | |
/* Put a formatted string to the file */ | |
/*-----------------------------------------------------------------------*/ | |
int f_printf ( | |
FIL* fil, /* Pointer to the file object */ | |
const TCHAR* str, /* Pointer to the format string */ | |
... /* Optional arguments... */ | |
) | |
{ | |
va_list arp; | |
BYTE f, r; | |
UINT i, j, w; | |
ULONG v; | |
TCHAR c, d, s[16], *p; | |
int res, cc; | |
va_start(arp, str); | |
for (cc = res = 0; cc != EOF; res += cc) { | |
c = *str++; | |
if (c == 0) break; /* End of string */ | |
if (c != '%') { /* Non escape character */ | |
cc = f_putc(c, fil); | |
if (cc != EOF) cc = 1; | |
continue; | |
} | |
w = f = 0; | |
c = *str++; | |
if (c == '0') { /* Flag: '0' padding */ | |
f = 1; c = *str++; | |
} else { | |
if (c == '-') { /* Flag: left justified */ | |
f = 2; c = *str++; | |
} | |
} | |
while (IsDigit(c)) { /* Precision */ | |
w = w * 10 + c - '0'; | |
c = *str++; | |
} | |
if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ | |
f |= 4; c = *str++; | |
} | |
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++) ; | |
res = 0; | |
while (!(f & 2) && j++ < w) res += (cc = f_putc(' ', fil)); | |
res += (cc = f_puts(p, fil)); | |
while (j++ < w) res += (cc = f_putc(' ', fil)); | |
if (cc != EOF) cc = res; | |
continue; | |
case 'C' : /* Character */ | |
cc = f_putc((TCHAR)va_arg(arp, int), fil); continue; | |
case 'B' : /* Binary */ | |
r = 2; break; | |
case 'O' : /* Octal */ | |
r = 8; break; | |
case 'D' : /* Signed decimal */ | |
case 'U' : /* Unsigned decimal */ | |
r = 10; break; | |
case 'X' : /* Hexdecimal */ | |
r = 16; break; | |
default: /* Unknown type (passthrough) */ | |
cc = f_putc(c, fil); continue; | |
} | |
/* Get an argument and put it in numeral */ | |
v = (f & 4) ? va_arg(arp, long) : ((d == 'D') ? (long)va_arg(arp, int) : va_arg(arp, unsigned int)); | |
if (d == 'D' && (v & 0x80000000)) { | |
v = 0 - v; | |
f |= 8; | |
} | |
i = 0; | |
do { | |
d = (TCHAR)(v % r); v /= r; | |
if (d > 9) d += (c == 'x') ? 0x27 : 0x07; | |
s[i++] = d + '0'; | |
} while (v && i < sizeof(s) / sizeof(s[0])); | |
if (f & 8) s[i++] = '-'; | |
j = i; d = (f & 1) ? '0' : ' '; | |
res = 0; | |
while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil)); | |
do res += (cc = f_putc(s[--i], fil)); while(i); | |
while (j++ < w) res += (cc = f_putc(' ', fil)); | |
if (cc != EOF) cc = res; | |
} | |
va_end(arp); | |
return (cc == EOF) ? cc : res; | |
} | |
#endif /* !_FS_READONLY */ | |
#endif /* _USE_STRFUNC */ |