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/* This file is part of ooFatFs, a customised version of FatFs
 * See https://github.com/micropython/oofatfs for details
 */

/*----------------------------------------------------------------------------/
/  FatFs - Generic FAT file system module  R0.12b                             /
/-----------------------------------------------------------------------------/
/
/ Copyright (C) 2016, ChaN, all right reserved.
/
/ FatFs module is an open source software. Redistribution and use of FatFs in
/ source and binary forms, with or without modification, are permitted provided
/ that the following condition is met:

/ 1. Redistributions of source code must retain the above copyright notice,
/    this condition and the following disclaimer.
/
/ This software is provided by the copyright holder and contributors "AS IS"
/ and any warranties related to this software are DISCLAIMED.
/ The copyright owner or contributors be NOT LIABLE for any damages caused
/ by use of this software.
/----------------------------------------------------------------------------*/


#ifndef _FATFS
#define _FATFS  68020   /* Revision ID */

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

/* This type MUST be 8-bit */
typedef uint8_t BYTE;

/* These types MUST be 16-bit */
typedef int16_t SHORT;
typedef uint16_t WORD;
typedef uint16_t WCHAR;

/* These types MUST be 16-bit or 32-bit */
typedef int INT;
typedef unsigned int UINT;

/* These types MUST be 32-bit */
typedef int32_t LONG;
typedef uint32_t DWORD;

/* This type MUST be 64-bit (Remove this for C89 compatibility) */
typedef uint64_t QWORD;

#include FFCONF_H          /* FatFs configuration options */

#if _FATFS != _FFCONF
#error Wrong configuration file (ffconf.h).
#endif



/* Definitions of volume management */

#if _MULTI_PARTITION            /* Multiple partition configuration */
#define LD2PT(fs) (fs->part)    /* Get partition index */
#else                           /* Single partition configuration */
#define LD2PT(fs) 0             /* Find first valid partition or in SFD */
#endif



/* Type of path name strings on FatFs API */

#if _LFN_UNICODE            /* Unicode (UTF-16) string */
#if _USE_LFN == 0
#error _LFN_UNICODE must be 0 at non-LFN cfg.
#endif
#ifndef _INC_TCHAR
typedef WCHAR TCHAR;
#define _T(x) L ## x
#define _TEXT(x) L ## x
#endif
#else                       /* ANSI/OEM string */
#ifndef _INC_TCHAR
typedef char TCHAR;
#define _T(x) x
#define _TEXT(x) x
#endif
#endif



/* Type of file size variables */

#if _FS_EXFAT
#if _USE_LFN == 0
#error LFN must be enabled when enable exFAT
#endif
typedef QWORD FSIZE_t;
#else
typedef DWORD FSIZE_t;
#endif



/* File system object structure (FATFS) */

typedef struct {
    void    *drv;           // block device underlying this filesystem
#if _MULTI_PARTITION        /* Multiple partition configuration */
    BYTE    part;           // Partition: 0:Auto detect, 1-4:Forced partition
#endif
    BYTE    fs_type;        /* File system type (0:N/A) */
    BYTE    n_fats;         /* Number of FATs (1 or 2) */
    BYTE    wflag;          /* win[] flag (b0:dirty) */
    BYTE    fsi_flag;       /* FSINFO flags (b7:disabled, b0:dirty) */
    WORD    id;             /* File system mount ID */
    WORD    n_rootdir;      /* Number of root directory entries (FAT12/16) */
    WORD    csize;          /* Cluster size [sectors] */
#if _MAX_SS != _MIN_SS
    WORD    ssize;          /* Sector size (512, 1024, 2048 or 4096) */
#endif
#if _USE_LFN != 0
    WCHAR*  lfnbuf;         /* LFN working buffer */
#endif
#if _FS_EXFAT
    BYTE*   dirbuf;         /* Directory entry block scratchpad buffer */
#endif
#if _FS_REENTRANT
    _SYNC_t sobj;           /* Identifier of sync object */
#endif
#if !_FS_READONLY
    DWORD   last_clst;      /* Last allocated cluster */
    DWORD   free_clst;      /* Number of free clusters */
#endif
#if _FS_RPATH != 0
    DWORD   cdir;           /* Current directory start cluster (0:root) */
#if _FS_EXFAT
    DWORD   cdc_scl;        /* Containing directory start cluster (invalid when cdir is 0) */
    DWORD   cdc_size;       /* b31-b8:Size of containing directory, b7-b0: Chain status */
    DWORD   cdc_ofs;        /* Offset in the containing directory (invalid when cdir is 0) */
#endif
#endif
    DWORD   n_fatent;       /* Number of FAT entries (number of clusters + 2) */
    DWORD   fsize;          /* Size of an FAT [sectors] */
    DWORD   volbase;        /* Volume base sector */
    DWORD   fatbase;        /* FAT base sector */
    DWORD   dirbase;        /* Root directory base sector/cluster */
    DWORD   database;       /* Data base sector */
    DWORD   winsect;        /* Current sector appearing in the win[] */
    BYTE    win[_MAX_SS];   /* Disk access window for Directory, FAT (and file data at tiny cfg) */
} FATFS;



/* Object ID and allocation information (_FDID) */

typedef struct {
    FATFS*  fs;         /* Pointer to the owner file system object */
    WORD    id;         /* Owner file system mount ID */
    BYTE    attr;       /* Object attribute */
    BYTE    stat;       /* Object chain status (b1-0: =0:not contiguous, =2:contiguous (no data on FAT), =3:got flagmented, b2:sub-directory stretched) */
    DWORD   sclust;     /* Object start cluster (0:no cluster or root directory) */
    FSIZE_t objsize;    /* Object size (valid when sclust != 0) */
#if _FS_EXFAT
    DWORD   n_cont;     /* Size of coutiguous part, clusters - 1 (valid when stat == 3) */
    DWORD   c_scl;      /* Containing directory start cluster (valid when sclust != 0) */
    DWORD   c_size;     /* b31-b8:Size of containing directory, b7-b0: Chain status (valid when c_scl != 0) */
    DWORD   c_ofs;      /* Offset in the containing directory (valid when sclust != 0) */
#endif
#if _FS_LOCK != 0
    UINT    lockid;     /* File lock ID origin from 1 (index of file semaphore table Files[]) */
#endif
} _FDID;



/* File object structure (FIL) */

typedef struct {
    _FDID   obj;            /* Object identifier (must be the 1st member to detect invalid object pointer) */
    BYTE    flag;           /* File status flags */
    BYTE    err;            /* Abort flag (error code) */
    FSIZE_t fptr;           /* File read/write pointer (Zeroed on file open) */
    DWORD   clust;          /* Current cluster of fpter (invalid when fprt is 0) */
    DWORD   sect;           /* Sector number appearing in buf[] (0:invalid) */
#if !_FS_READONLY
    DWORD   dir_sect;       /* Sector number containing the directory entry */
    BYTE*   dir_ptr;        /* Pointer to the directory entry in the win[] */
#endif
#if _USE_FASTSEEK
    DWORD*  cltbl;          /* Pointer to the cluster link map table (nulled on open, set by application) */
#endif
#if !_FS_TINY
    BYTE    buf[_MAX_SS];   /* File private data read/write window */
#endif
} FIL;



/* Directory object structure (FF_DIR) */

typedef struct {
    _FDID   obj;            /* Object identifier */
    DWORD   dptr;           /* Current read/write offset */
    DWORD   clust;          /* Current cluster */
    DWORD   sect;           /* Current sector */
    BYTE*   dir;            /* Pointer to the directory item in the win[] */
    BYTE    fn[12];         /* SFN (in/out) {body[8],ext[3],status[1]} */
#if _USE_LFN != 0
    DWORD   blk_ofs;        /* Offset of current entry block being processed (0xFFFFFFFF:Invalid) */
#endif
#if _USE_FIND
    const TCHAR* pat;       /* Pointer to the name matching pattern */
#endif
} FF_DIR;



/* File information structure (FILINFO) */

typedef struct {
    FSIZE_t fsize;          /* File size */
    WORD    fdate;          /* Modified date */
    WORD    ftime;          /* Modified time */
    BYTE    fattrib;        /* File attribute */
#if _USE_LFN != 0
    TCHAR   altname[13];            /* Altenative file name */
    TCHAR   fname[_MAX_LFN + 1];    /* Primary file name */
#else
    TCHAR   fname[13];      /* File name */
#endif
} FILINFO;



/* File function return code (FRESULT) */

typedef enum {
    FR_OK = 0,              /* (0) Succeeded */
    FR_DISK_ERR,            /* (1) A hard error occurred in the low level disk I/O layer */
    FR_INT_ERR,             /* (2) Assertion failed */
    FR_NOT_READY,           /* (3) The physical drive cannot work */
    FR_NO_FILE,             /* (4) Could not find the file */
    FR_NO_PATH,             /* (5) Could not find the path */
    FR_INVALID_NAME,        /* (6) The path name format is invalid */
    FR_DENIED,              /* (7) Access denied due to prohibited access or directory full */
    FR_EXIST,               /* (8) Access denied due to prohibited access */
    FR_INVALID_OBJECT,      /* (9) The file/directory object is invalid */
    FR_WRITE_PROTECTED,     /* (10) The physical drive is write protected */
    FR_INVALID_DRIVE,       /* (11) The logical drive number is invalid */
    FR_NOT_ENABLED,         /* (12) The volume has no work area */
    FR_NO_FILESYSTEM,       /* (13) There is no valid FAT volume */
    FR_MKFS_ABORTED,        /* (14) The f_mkfs() aborted due to any problem */
    FR_TIMEOUT,             /* (15) Could not get a grant to access the volume within defined period */
    FR_LOCKED,              /* (16) The operation is rejected according to the file sharing policy */
    FR_NOT_ENOUGH_CORE,     /* (17) LFN working buffer could not be allocated */
    FR_TOO_MANY_OPEN_FILES, /* (18) Number of open files > _FS_LOCK */
    FR_INVALID_PARAMETER    /* (19) Given parameter is invalid */
} FRESULT;



/*--------------------------------------------------------------*/
/* FatFs module application interface                           */

FRESULT f_open (FATFS *fs, FIL* fp, const TCHAR* path, BYTE mode);  /* Open or create a file */
FRESULT f_close (FIL* fp);                                          /* Close an open file object */
FRESULT f_read (FIL* fp, void* buff, UINT btr, UINT* br);           /* Read data from the file */
FRESULT f_write (FIL* fp, const void* buff, UINT btw, UINT* bw);    /* Write data to the file */
FRESULT f_lseek (FIL* fp, FSIZE_t ofs);                             /* Move file pointer of the file object */
FRESULT f_truncate (FIL* fp);                                       /* Truncate the file */
FRESULT f_sync (FIL* fp);                                           /* Flush cached data of the writing file */
FRESULT f_opendir (FATFS *fs, FF_DIR* dp, const TCHAR* path);       /* Open a directory */
FRESULT f_closedir (FF_DIR* dp);                                    /* Close an open directory */
FRESULT f_readdir (FF_DIR* dp, FILINFO* fno);                       /* Read a directory item */
FRESULT f_findfirst (FF_DIR* dp, FILINFO* fno, const TCHAR* path, const TCHAR* pattern); /* Find first file */
FRESULT f_findnext (FF_DIR* dp, FILINFO* fno);                      /* Find next file */
FRESULT f_mkdir (FATFS *fs, const TCHAR* path);                     /* Create a sub directory */
FRESULT f_unlink (FATFS *fs, const TCHAR* path);                    /* Delete an existing file or directory */
FRESULT f_rename (FATFS *fs, const TCHAR* path_old, const TCHAR* path_new); /* Rename/Move a file or directory */
FRESULT f_stat (FATFS *fs, const TCHAR* path, FILINFO* fno);        /* Get file status */
FRESULT f_chmod (FATFS *fs, const TCHAR* path, BYTE attr, BYTE mask); /* Change attribute of a file/dir */
FRESULT f_utime (FATFS *fs, const TCHAR* path, const FILINFO* fno); /* Change timestamp of a file/dir */
FRESULT f_chdir (FATFS *fs, const TCHAR* path);                     /* Change current directory */
FRESULT f_getcwd (FATFS *fs, TCHAR* buff, UINT len);                /* Get current directory */
FRESULT f_getfree (FATFS *fs, DWORD* nclst);                        /* Get number of free clusters on the drive */
FRESULT f_getlabel (FATFS *fs, TCHAR* label, DWORD* vsn);           /* Get volume label */
FRESULT f_setlabel (FATFS *fs, const TCHAR* label);                 /* Set volume label */
FRESULT f_forward (FIL* fp, UINT(*func)(const BYTE*,UINT), UINT btf, UINT* bf); /* Forward data to the stream */
FRESULT f_expand (FIL* fp, FSIZE_t szf, BYTE opt);                  /* Allocate a contiguous block to the file */
FRESULT f_mount (FATFS* fs);                                        /* Mount/Unmount a logical drive */
FRESULT f_umount (FATFS* fs);                                       /* Unmount a logical drive */
FRESULT f_mkfs (FATFS *fs, BYTE opt, DWORD au, void* work, UINT len); /* Create a FAT volume */
FRESULT f_fdisk (void *pdrv, const DWORD* szt, void* work);         /* Divide a physical drive into some partitions */

#define f_eof(fp) ((int)((fp)->fptr == (fp)->obj.objsize))
#define f_error(fp) ((fp)->err)
#define f_tell(fp) ((fp)->fptr)
#define f_size(fp) ((fp)->obj.objsize)
#define f_rewind(fp) f_lseek((fp), 0)
#define f_rewinddir(dp) f_readdir((dp), 0)

#ifndef EOF
#define EOF (-1)
#endif




/*--------------------------------------------------------------*/
/* Additional user defined functions                            */

/* RTC function */
#if !_FS_READONLY && !_FS_NORTC
DWORD get_fattime (void);
#endif

/* Unicode support functions */
#if _USE_LFN != 0                       /* Unicode - OEM code conversion */
WCHAR ff_convert (WCHAR chr, UINT dir); /* OEM-Unicode bidirectional conversion */
WCHAR ff_wtoupper (WCHAR chr);          /* Unicode upper-case conversion */
#if _USE_LFN == 3                       /* Memory functions */
void* ff_memalloc (UINT msize);         /* Allocate memory block */
void ff_memfree (void* mblock);         /* Free memory block */
#endif
#endif

/* Sync functions */
#if _FS_REENTRANT
int ff_cre_syncobj (FATFS *fatfs, _SYNC_t* sobj); /* Create a sync object */
int ff_req_grant (_SYNC_t sobj);                /* Lock sync object */
void ff_rel_grant (_SYNC_t sobj);               /* Unlock sync object */
int ff_del_syncobj (_SYNC_t sobj);              /* Delete a sync object */
#endif




/*--------------------------------------------------------------*/
/* Flags and offset address                                     */


/* File access mode and open method flags (3rd argument of f_open) */
#define FA_READ             0x01
#define FA_WRITE            0x02
#define FA_OPEN_EXISTING    0x00
#define FA_CREATE_NEW       0x04
#define FA_CREATE_ALWAYS    0x08
#define FA_OPEN_ALWAYS      0x10
#define FA_OPEN_APPEND      0x30

/* Fast seek controls (2nd argument of f_lseek) */
#define CREATE_LINKMAP  ((FSIZE_t)0 - 1)

/* Format options (2nd argument of f_mkfs) */
#define FM_FAT      0x01
#define FM_FAT32    0x02
#define FM_EXFAT    0x04
#define FM_ANY      0x07
#define FM_SFD      0x08

/* Filesystem type (FATFS.fs_type) */
#define FS_FAT12    1
#define FS_FAT16    2
#define FS_FAT32    3
#define FS_EXFAT    4

/* File attribute bits for directory entry (FILINFO.fattrib) */
#define AM_RDO  0x01    /* Read only */
#define AM_HID  0x02    /* Hidden */
#define AM_SYS  0x04    /* System */
#define AM_DIR  0x10    /* Directory */
#define AM_ARC  0x20    /* Archive */


#ifdef __cplusplus
}
#endif

#endif /* _FATFS */