savelij13
bf4615c01f
- Removed a long-pending limitation that f_getcwd and double-dot .. in the path name did not work on the exFAT volume. - Fixed f_readdir cannot detect end of directory and it leads the application process into infinite loop. (appeared at R0.15b) - Fixed dot names with terminating separator or duplicated separator are rejected when LFN is not enabled.
449 lines
16 KiB
C
449 lines
16 KiB
C
/*----------------------------------------------------------------------------/
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/ FatFs - Generic FAT Filesystem module R0.16 /
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/-----------------------------------------------------------------------------/
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/
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/ Copyright (C) 2025, ChaN, all right reserved.
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/
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/ FatFs module is an open source software. Redistribution and use of FatFs in
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/ source and binary forms, with or without modification, are permitted provided
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/ that the following condition is met:
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/ 1. Redistributions of source code must retain the above copyright notice,
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/ this condition and the following disclaimer.
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/
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/ This software is provided by the copyright holder and contributors "AS IS"
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/ and any warranties related to this software are DISCLAIMED.
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/ The copyright owner or contributors be NOT LIABLE for any damages caused
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/ by use of this software.
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/
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/----------------------------------------------------------------------------*/
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#ifndef FF_DEFINED
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#define FF_DEFINED 80386 /* Revision ID */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if !defined(FFCONF_DEF)
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#include "ffconf.h" /* FatFs configuration options */
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#endif
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#if FF_DEFINED != FFCONF_DEF
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#error Wrong configuration file (ffconf.h).
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#endif
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/* Integer types used for FatFs API */
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#if defined(_WIN32) /* Windows VC++ (for development only) */
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#define FF_INTDEF 2
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#include <windows.h>
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typedef unsigned __int64 QWORD;
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#include <float.h>
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#define isnan(v) _isnan(v)
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#define isinf(v) (!_finite(v))
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#elif (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__cplusplus) /* C99 or later */
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#define FF_INTDEF 2
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#include <stdint.h>
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typedef unsigned int UINT; /* int must be 16-bit or 32-bit */
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typedef unsigned char BYTE; /* char must be 8-bit */
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typedef uint16_t WORD; /* 16-bit unsigned */
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typedef uint32_t DWORD; /* 32-bit unsigned */
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typedef uint64_t QWORD; /* 64-bit unsigned */
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typedef WORD WCHAR; /* UTF-16 code unit */
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#else /* Earlier than C99 */
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#define FF_INTDEF 1
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typedef unsigned int UINT; /* int must be 16-bit or 32-bit */
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typedef unsigned char BYTE; /* char must be 8-bit */
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typedef unsigned short WORD; /* short must be 16-bit */
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typedef unsigned long DWORD; /* long must be 32-bit */
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typedef WORD WCHAR; /* UTF-16 code unit */
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#endif
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/* Type of file size and LBA variables */
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#if FF_FS_EXFAT
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#if FF_INTDEF != 2
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#error exFAT feature wants C99 or later
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#endif
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typedef QWORD FSIZE_t;
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#if FF_LBA64
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typedef QWORD LBA_t;
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#else
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typedef DWORD LBA_t;
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#endif
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#else
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#if FF_LBA64
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#error exFAT needs to be enabled when enable 64-bit LBA
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#endif
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typedef DWORD FSIZE_t;
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typedef DWORD LBA_t;
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#endif
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/* Type of path name strings on FatFs API (TCHAR) */
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#if FF_USE_LFN && FF_LFN_UNICODE == 1 /* Unicode in UTF-16 encoding */
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typedef WCHAR TCHAR;
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#define _T(x) L ## x
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#define _TEXT(x) L ## x
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#elif FF_USE_LFN && FF_LFN_UNICODE == 2 /* Unicode in UTF-8 encoding */
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typedef char TCHAR;
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#define _T(x) u8 ## x
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#define _TEXT(x) u8 ## x
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#elif FF_USE_LFN && FF_LFN_UNICODE == 3 /* Unicode in UTF-32 encoding */
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typedef DWORD TCHAR;
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#define _T(x) U ## x
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#define _TEXT(x) U ## x
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#elif FF_USE_LFN && (FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3)
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#error Wrong FF_LFN_UNICODE setting
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#else /* ANSI/OEM code in SBCS/DBCS */
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typedef char TCHAR;
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#define _T(x) x
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#define _TEXT(x) x
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#endif
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/* Definitions of volume management */
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#if FF_MULTI_PARTITION /* Multiple partition configuration */
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typedef struct {
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BYTE pd; /* Associated physical drive */
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BYTE pt; /* Associated partition (0:Auto detect, 1-4:Forced partition) */
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} PARTITION;
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extern PARTITION VolToPart[]; /* Volume to partition mapping table */
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#endif
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#if FF_STR_VOLUME_ID
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#ifndef FF_VOLUME_STRS
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extern const char* VolumeStr[FF_VOLUMES]; /* User defined volume ID table */
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#endif
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#endif
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/* Current working directory structure (FFXCWDS) */
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#if FF_FS_EXFAT && FF_FS_RPATH
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#if FF_PATH_DEPTH < 1
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#error FF_PATH_DEPTH must not be zero
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#endif
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typedef struct {
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DWORD d_scl; /* Directory start cluster (0:root dir) */
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DWORD d_size; /* Size of directory (b7-b0: cluster chain status) (invalid if d_scl == 0) */
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DWORD nxt_ofs; /* Offset of entry of next dir in this directory (invalid if last link) */
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} FFXCWDL;
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typedef struct {
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UINT depth; /* Current directory depth (0:root dir) */
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FFXCWDL tbl[FF_PATH_DEPTH + 1]; /* Directory chain of current working directory path */
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} FFXCWDS;
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#endif
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/* Filesystem object structure (FATFS) */
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typedef struct {
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BYTE fs_type; /* Filesystem type (0:not mounted) */
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BYTE pdrv; /* Physical drive that holds this volume */
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BYTE ldrv; /* Logical drive number (used only when FF_FS_REENTRANT) */
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BYTE n_fats; /* Number of FATs (1 or 2) */
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BYTE wflag; /* win[] status (b0:dirty) */
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BYTE fsi_flag; /* Allocation information control (b7:disabled, b0:dirty) */
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WORD id; /* Volume mount ID */
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WORD n_rootdir; /* Number of root directory entries (FAT12/16) */
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WORD csize; /* Cluster size [sectors] */
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#if FF_MAX_SS != FF_MIN_SS
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WORD ssize; /* Sector size (512, 1024, 2048 or 4096) */
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#endif
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#if FF_USE_LFN
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WCHAR* lfnbuf; /* Pointer to LFN working buffer */
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#endif
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#if !FF_FS_READONLY
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DWORD last_clst; /* Last allocated cluster (invalid if >=n_fatent) */
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DWORD free_clst; /* Number of free clusters (invalid if >=fs->n_fatent-2) */
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#endif
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#if FF_FS_RPATH
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DWORD cdir; /* Current directory start cluster (0:root) */
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#endif
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DWORD n_fatent; /* Number of FAT entries (number of clusters + 2) */
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DWORD fsize; /* Number of sectors per FAT */
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LBA_t winsect; /* Current sector appearing in the win[] */
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LBA_t volbase; /* Volume base sector */
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LBA_t fatbase; /* FAT base sector */
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LBA_t dirbase; /* Root directory base sector (FAT12/16) or cluster (FAT32/exFAT) */
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LBA_t database; /* Data base sector */
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#if FF_FS_EXFAT
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LBA_t bitbase; /* Allocation bitmap base sector */
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BYTE* dirbuf; /* Pointer to directory entry block buffer */
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#if FF_FS_RPATH
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FFXCWDS xcwds; /* Crrent working directory structure */
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FFXCWDS xcwds2; /* Working buffer to follow the path */
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#endif
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#endif
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BYTE win[FF_MAX_SS]; /* Disk access window for directory, FAT (and file data in tiny cfg) */
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} FATFS;
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/* Object ID and allocation information (FFOBJID) */
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typedef struct {
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FATFS* fs; /* Pointer to the volume holding this object */
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WORD id; /* Volume mount ID when this object was opened */
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BYTE attr; /* Object attribute */
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BYTE stat; /* Object chain status (exFAT: b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session, b2:sub-directory stretched) */
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DWORD sclust; /* Object data cluster (0:no data or root directory) */
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FSIZE_t objsize; /* Object size (valid when sclust != 0) */
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#if FF_FS_EXFAT
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DWORD n_cont; /* Size of first fragment - 1 (valid when stat == 3) */
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DWORD n_frag; /* Size of last fragment needs to be written to FAT (valid when not zero) */
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DWORD c_scl; /* Cluster of directory holding this object (valid when sclust != 0) */
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DWORD c_size; /* Size of directory holding this object (b7-b0: allocation status, valid when c_scl != 0) */
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DWORD c_ofs; /* Offset of entry in the holding directory */
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#endif
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#if FF_FS_LOCK
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UINT lockid; /* File lock ID origin from 1 (index of file semaphore table Files[]) */
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#endif
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} FFOBJID;
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/* File object structure (FIL) */
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typedef struct {
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FFOBJID obj; /* Object identifier (must be the 1st member to detect invalid object pointer) */
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BYTE flag; /* File status flags */
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BYTE err; /* Abort flag (error code) */
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FSIZE_t fptr; /* File read/write pointer (0 on open) */
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DWORD clust; /* Current cluster of fptr (invalid when fptr is 0) */
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LBA_t sect; /* Sector number appearing in buf[] (0:invalid) */
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#if !FF_FS_READONLY
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LBA_t dir_sect; /* Sector number containing the directory entry (not used in exFAT) */
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BYTE* dir_ptr; /* Pointer to the directory entry in the win[] (not used in exFAT) */
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#endif
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#if FF_USE_FASTSEEK
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DWORD* cltbl; /* Pointer to the cluster link map table (nulled on open; set by application) */
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#endif
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#if !FF_FS_TINY
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BYTE buf[FF_MAX_SS]; /* File private data read/write window */
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#endif
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} FIL;
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/* Directory object structure (DIR) */
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typedef struct {
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FFOBJID obj; /* Object identifier (must be the 1st member to detect invalid object pointer) */
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DWORD dptr; /* Current read/write offset */
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DWORD clust; /* Current cluster */
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LBA_t sect; /* Current sector (0:no more item to read) */
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BYTE* dir; /* Pointer to the directory item in the win[] in filesystem object */
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BYTE fn[12]; /* SFN (in/out) {body[0-7],ext[8-10],status[11]} */
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#if FF_USE_LFN
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DWORD blk_ofs; /* Offset of current entry block being processed (0xFFFFFFFF:invalid) */
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#endif
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#if FF_USE_FIND
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const TCHAR *pat; /* Pointer to the name matching pattern */
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#endif
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} DIR;
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/* File/directory information structure (FILINFO) */
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typedef struct {
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FSIZE_t fsize; /* File size (invalid for directory) */
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WORD fdate; /* Date of file modification or directory creation */
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WORD ftime; /* Time of file modification or directory creation */
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#if FF_FS_CRTIME
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WORD crdate; /* Date of object createion */
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WORD crtime; /* Time of object createion */
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#endif
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BYTE fattrib; /* Object attribute */
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#if FF_USE_LFN
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TCHAR altname[FF_SFN_BUF + 1];/* Alternative object name */
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TCHAR fname[FF_LFN_BUF + 1]; /* Primary object name */
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#else
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TCHAR fname[12 + 1]; /* Object name */
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#endif
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} FILINFO;
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/* Format parameter structure (MKFS_PARM) used for f_mkfs() */
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typedef struct {
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BYTE fmt; /* Format option (FM_FAT, FM_FAT32, FM_EXFAT and FM_SFD) */
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BYTE n_fat; /* Number of FATs */
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UINT align; /* Data area alignment (sector) */
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UINT n_root; /* Number of root directory entries */
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DWORD au_size; /* Cluster size (byte) */
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} MKFS_PARM;
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/* File function return code (FRESULT) */
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typedef enum {
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FR_OK = 0, /* (0) Function succeeded */
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FR_DISK_ERR, /* (1) A hard error occurred in the low level disk I/O layer */
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FR_INT_ERR, /* (2) Assertion failed */
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FR_NOT_READY, /* (3) The physical drive does not work */
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FR_NO_FILE, /* (4) Could not find the file */
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FR_NO_PATH, /* (5) Could not find the path */
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FR_INVALID_NAME, /* (6) The path name format is invalid */
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FR_DENIED, /* (7) Access denied due to a prohibited access or directory full */
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FR_EXIST, /* (8) Access denied due to a prohibited access */
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FR_INVALID_OBJECT, /* (9) The file/directory object is invalid */
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FR_WRITE_PROTECTED, /* (10) The physical drive is write protected */
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FR_INVALID_DRIVE, /* (11) The logical drive number is invalid */
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FR_NOT_ENABLED, /* (12) The volume has no work area */
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FR_NO_FILESYSTEM, /* (13) Could not find a valid FAT volume */
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FR_MKFS_ABORTED, /* (14) The f_mkfs function aborted due to some problem */
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FR_TIMEOUT, /* (15) Could not take control of the volume within defined period */
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FR_LOCKED, /* (16) The operation is rejected according to the file sharing policy */
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FR_NOT_ENOUGH_CORE, /* (17) LFN working buffer could not be allocated, given buffer size is insufficient or too deep path */
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FR_TOO_MANY_OPEN_FILES, /* (18) Number of open files > FF_FS_LOCK */
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FR_INVALID_PARAMETER /* (19) Given parameter is invalid */
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} FRESULT;
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/*--------------------------------------------------------------*/
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/* FatFs Module Application Interface */
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/*--------------------------------------------------------------*/
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FRESULT f_open (FIL* fp, const TCHAR* path, BYTE mode); /* Open or create a file */
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FRESULT f_close (FIL* fp); /* Close an open file object */
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FRESULT f_read (FIL* fp, void* buff, UINT btr, UINT* br); /* Read data from the file */
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FRESULT f_write (FIL* fp, const void* buff, UINT btw, UINT* bw); /* Write data to the file */
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FRESULT f_lseek (FIL* fp, FSIZE_t ofs); /* Move file pointer of the file object */
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FRESULT f_truncate (FIL* fp); /* Truncate the file */
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FRESULT f_sync (FIL* fp); /* Flush cached data of the writing file */
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FRESULT f_opendir (DIR* dp, const TCHAR* path); /* Open a directory */
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FRESULT f_closedir (DIR* dp); /* Close an open directory */
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FRESULT f_readdir (DIR* dp, FILINFO* fno); /* Read a directory item */
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FRESULT f_findfirst (DIR* dp, FILINFO* fno, const TCHAR* path, const TCHAR* pattern); /* Find first file */
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FRESULT f_findnext (DIR* dp, FILINFO* fno); /* Find next file */
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FRESULT f_mkdir (const TCHAR* path); /* Create a sub directory */
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FRESULT f_unlink (const TCHAR* path); /* Delete an existing file or directory */
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FRESULT f_rename (const TCHAR* path_old, const TCHAR* path_new); /* Rename/Move a file or directory */
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FRESULT f_stat (const TCHAR* path, FILINFO* fno); /* Get file status */
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FRESULT f_chmod (const TCHAR* path, BYTE attr, BYTE mask); /* Change attribute of a file/dir */
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FRESULT f_utime (const TCHAR* path, const FILINFO* fno); /* Change timestamp of a file/dir */
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FRESULT f_chdir (const TCHAR* path); /* Change current directory */
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FRESULT f_chdrive (const TCHAR* path); /* Change current drive */
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FRESULT f_getcwd (TCHAR* buff, UINT len); /* Get current directory */
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FRESULT f_getfree (const TCHAR* path, DWORD* nclst, FATFS** fatfs); /* Get number of free clusters on the drive */
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FRESULT f_getlabel (const TCHAR* path, TCHAR* label, DWORD* vsn); /* Get volume label */
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FRESULT f_setlabel (const TCHAR* label); /* Set volume label */
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FRESULT f_forward (FIL* fp, UINT(*func)(const BYTE*,UINT), UINT btf, UINT* bf); /* Forward data to the stream */
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FRESULT f_expand (FIL* fp, FSIZE_t fsz, BYTE opt); /* Allocate a contiguous block to the file */
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FRESULT f_mount (FATFS* fs, const TCHAR* path, BYTE opt); /* Mount/Unmount a logical drive */
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FRESULT f_mkfs (const TCHAR* path, const MKFS_PARM* opt, void* work, UINT len); /* Create a FAT volume */
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FRESULT f_fdisk (BYTE pdrv, const LBA_t ptbl[], void* work); /* Divide a physical drive into some partitions */
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FRESULT f_setcp (WORD cp); /* Set current code page */
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int f_putc (TCHAR c, FIL* fp); /* Put a character to the file */
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int f_puts (const TCHAR* str, FIL* cp); /* Put a string to the file */
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int f_printf (FIL* fp, const TCHAR* str, ...); /* Put a formatted string to the file */
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TCHAR* f_gets (TCHAR* buff, int len, FIL* fp); /* Get a string from the file */
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/* Some API fucntions are implemented as macro */
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#define f_eof(fp) ((int)((fp)->fptr == (fp)->obj.objsize))
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#define f_error(fp) ((fp)->err)
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#define f_tell(fp) ((fp)->fptr)
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#define f_size(fp) ((fp)->obj.objsize)
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#define f_rewind(fp) f_lseek((fp), 0)
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#define f_rewinddir(dp) f_readdir((dp), 0)
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#define f_rmdir(path) f_unlink(path)
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#define f_unmount(path) f_mount(0, path, 0)
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/*--------------------------------------------------------------*/
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/* Additional Functions */
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/*--------------------------------------------------------------*/
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/* RTC function (provided by user) */
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#if !FF_FS_READONLY && !FF_FS_NORTC
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DWORD get_fattime (void); /* Get current time */
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#endif
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/* LFN support functions (defined in ffunicode.c) */
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#if FF_USE_LFN >= 1
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WCHAR ff_oem2uni (WCHAR oem, WORD cp); /* OEM code to Unicode conversion */
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WCHAR ff_uni2oem (DWORD uni, WORD cp); /* Unicode to OEM code conversion */
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DWORD ff_wtoupper (DWORD uni); /* Unicode upper-case conversion */
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#endif
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/* O/S dependent functions (samples available in ffsystem.c) */
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#if FF_USE_LFN == 3 /* Dynamic memory allocation */
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void* ff_memalloc (UINT msize); /* Allocate memory block */
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void ff_memfree (void* mblock); /* Free memory block */
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#endif
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#if FF_FS_REENTRANT /* Sync functions */
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int ff_mutex_create (int vol); /* Create a sync object */
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void ff_mutex_delete (int vol); /* Delete a sync object */
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int ff_mutex_take (int vol); /* Lock sync object */
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void ff_mutex_give (int vol); /* Unlock sync object */
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#endif
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/*--------------------------------------------------------------*/
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/* Flags and Offset Address */
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/*--------------------------------------------------------------*/
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/* File access mode and open method flags (3rd argument of f_open function) */
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#define FA_READ 0x01
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#define FA_WRITE 0x02
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#define FA_OPEN_EXISTING 0x00
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#define FA_CREATE_NEW 0x04
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#define FA_CREATE_ALWAYS 0x08
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#define FA_OPEN_ALWAYS 0x10
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#define FA_OPEN_APPEND 0x30
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/* Fast seek controls (2nd argument of f_lseek function) */
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#define CREATE_LINKMAP ((FSIZE_t)0 - 1)
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/* Format options (2nd argument of f_mkfs function) */
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#define FM_FAT 0x01
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#define FM_FAT32 0x02
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#define FM_EXFAT 0x04
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#define FM_ANY 0x07
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#define FM_SFD 0x08
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/* Filesystem type (FATFS.fs_type) */
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#define FS_FAT12 1
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#define FS_FAT16 2
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#define FS_FAT32 3
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#define FS_EXFAT 4
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/* File attribute bits for directory entry (FILINFO.fattrib) */
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#define AM_RDO 0x01 /* Read only */
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#define AM_HID 0x02 /* Hidden */
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#define AM_SYS 0x04 /* System */
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#define AM_DIR 0x10 /* Directory */
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#define AM_ARC 0x20 /* Archive */
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#ifdef __cplusplus
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}
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#endif
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#endif /* FF_DEFINED */
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