text: /* This file is part of ooFatFs, a customised version of FatFs
   * See https://github.com/micropython/oofatfs for details
   */
  
  /*----------------------------------------------------------------------------/
  /  FatFs - Generic FAT Filesystem module  R0.13c                              /
  /-----------------------------------------------------------------------------/
  /
  / Copyright (C) 2018, 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 FF_DEFINED
  #define FF_DEFINED  86604   /* Revision ID */
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #ifndef FFCONF_H // HSB 20200521 <
  #define FFCONF_H "ffconf.h"
  #endif // HSB 20200521 >
  #include FFCONF_H       /* FatFs configuration options */
  
  #if FF_DEFINED != FFCONF_DEF
  #error Wrong configuration file (ffconf.h).
  #endif
  
  
  /* Integer types used for FatFs API */
  
  #if defined(_WIN32) /* Main development platform */
  #define FF_INTDEF 2
  #include <windows.h>
  typedef unsigned __int64 QWORD;
  #elif (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__cplusplus)    /* C99 or later */
  #define FF_INTDEF 2
  #include <stdint.h>
  typedef unsigned int    UINT;   /* int must be 16-bit or 32-bit */
  typedef unsigned char   BYTE;   /* char must be 8-bit */
  typedef uint16_t        WORD;   /* 16-bit unsigned integer */
  typedef uint16_t        WCHAR;  /* 16-bit unsigned integer */
  typedef uint32_t        DWORD;  /* 32-bit unsigned integer */
  typedef uint64_t        QWORD;  /* 64-bit unsigned integer */
  #else   /* Earlier than C99 */
  #define FF_INTDEF 1
  typedef unsigned int    UINT;   /* int must be 16-bit or 32-bit */
  typedef unsigned char   BYTE;   /* char must be 8-bit */
  typedef unsigned short  WORD;   /* 16-bit unsigned integer */
  typedef unsigned short  WCHAR;  /* 16-bit unsigned integer */
  typedef unsigned long   DWORD;  /* 32-bit unsigned integer */
  #endif
  
  
  /* Definitions of volume management */
  
  #if FF_STR_VOLUME_ID
  #ifndef FF_VOLUME_STRS
  extern const char* VolumeStr[FF_VOLUMES];   /* User defied volume ID */
  #endif
  #endif
  
  
  
  /* Type of path name strings on FatFs API */
  
  #ifndef _INC_TCHAR
  #define _INC_TCHAR
  
  #if FF_USE_LFN && FF_LFN_UNICODE == 1   /* Unicode in UTF-16 encoding */
  typedef WCHAR TCHAR;
  #define _T(x) L ## x
  #define _TEXT(x) L ## x
  #elif FF_USE_LFN && FF_LFN_UNICODE == 2 /* Unicode in UTF-8 encoding */
  typedef char TCHAR;
  #define _T(x) u8 ## x
  #define _TEXT(x) u8 ## x
  #elif FF_USE_LFN && FF_LFN_UNICODE == 3 /* Unicode in UTF-32 encoding */
  typedef DWORD TCHAR;
  #define _T(x) U ## x
  #define _TEXT(x) U ## x
  #elif FF_USE_LFN && (FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3)
  #error Wrong FF_LFN_UNICODE setting
  #else                                   /* ANSI/OEM code in SBCS/DBCS */
  typedef char TCHAR;
  #define _T(x) x
  #define _TEXT(x) x
  #endif
  
  #endif
  
  
  
  /* Type of file size variables */
  
  #if FF_FS_EXFAT
  #if FF_INTDEF != 2
  #error exFAT feature wants C99 or later
  #endif
  typedef QWORD FSIZE_t;
  #else
  typedef DWORD FSIZE_t;
  #endif
  
  
  
  /* Filesystem object structure (FATFS) */
  
  typedef struct {
      void    *drv;           // block device underlying this filesystem
  #if FF_MULTI_PARTITION      /* Multiple partition configuration */
      BYTE    part;           // Partition: 0:Auto detect, 1-4:Forced partition
  #endif
      BYTE    fs_type;        /* Filesystem type (0:not mounted) */
      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;             /* Volume mount ID */
      WORD    n_rootdir;      /* Number of root directory entries (FAT12/16) */
      WORD    csize;          /* Cluster size [sectors] */
  #if FF_MAX_SS != FF_MIN_SS
      WORD    ssize;          /* Sector size (512, 1024, 2048 or 4096) */
  #endif
  #if FF_USE_LFN
      WCHAR*  lfnbuf;         /* LFN working buffer */
  #endif
  #if FF_FS_EXFAT
      BYTE*   dirbuf;         /* Directory entry block scratchpad buffer for exFAT */
  #endif
  #if FF_FS_REENTRANT
      FF_SYNC_t   sobj;       /* Identifier of sync object */
  #endif
  #if !FF_FS_READONLY
      DWORD   last_clst;      /* Last allocated cluster */
      DWORD   free_clst;      /* Number of free clusters */
  #endif
  #if FF_FS_RPATH
      DWORD   cdir;           /* Current directory start cluster (0:root) */
  #if FF_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 */
  #if FF_FS_EXFAT
      DWORD   bitbase;        /* Allocation bitmap base sector */
  #endif
      DWORD   winsect;        /* Current sector appearing in the win[] */
      BYTE    win[FF_MAX_SS]; /* Disk access window for Directory, FAT (and file data at tiny cfg) */
  } FATFS;
  
  
  
  /* Object ID and allocation information (FFOBJID) */
  
  typedef struct {
      FATFS*  fs;             /* Pointer to the hosting volume of this object */
      WORD    id;             /* Hosting volume mount ID */
      BYTE    attr;           /* Object attribute */
      BYTE    stat;           /* Object chain status (b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session, b2:sub-directory stretched) */
      DWORD   sclust;         /* Object data start cluster (0:no cluster or root directory) */
      FSIZE_t objsize;        /* Object size (valid when sclust != 0) */
  #if FF_FS_EXFAT
      DWORD   n_cont;         /* Size of first fragment - 1 (valid when stat == 3) */
      DWORD   n_frag;         /* Size of last fragment needs to be written to FAT (valid when not zero) */
      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 file object and sclust != 0) */
  #endif
  #if FF_FS_LOCK
      UINT    lockid;         /* File lock ID origin from 1 (index of file semaphore table Files[]) */
  #endif
  } FFOBJID;
  
  
  
  /* File object structure (FIL) */
  
  typedef struct {
      FFOBJID 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 fptr is 0) */
      DWORD   sect;           /* Sector number appearing in buf[] (0:invalid) */
  #if !FF_FS_READONLY
      DWORD   dir_sect;       /* Sector number containing the directory entry (not used at exFAT) */
      BYTE*   dir_ptr;        /* Pointer to the directory entry in the win[] (not used at exFAT) */
  #endif
  #if FF_USE_FASTSEEK
      DWORD*  cltbl;          /* Pointer to the cluster link map table (nulled on open, set by application) */
  #endif
  #if !FF_FS_TINY
      BYTE    buf[FF_MAX_SS]; /* File private data read/write window */
  #endif
  } FIL;
  
  
  
  /* Directory object structure (FF_DIR) */
  
  typedef struct {
      FFOBJID obj;            /* Object identifier */
      DWORD   dptr;           /* Current read/write offset */
      DWORD   clust;          /* Current cluster */
      DWORD   sect;           /* Current sector (0:Read operation has terminated) */
      BYTE*   dir;            /* Pointer to the directory item in the win[] */
      BYTE    fn[12];         /* SFN (in/out) {body[8],ext[3],status[1]} */
  #if FF_USE_LFN
      DWORD   blk_ofs;        /* Offset of current entry block being processed (0xFFFFFFFF:Invalid) */
  #endif
  #if FF_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 FF_USE_LFN
      TCHAR   altname[FF_SFN_BUF + 1];/* Altenative file name */
      TCHAR   fname[FF_LFN_BUF + 1];  /* Primary file name */
  #else
      TCHAR   fname[12 + 1];  /* 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 > FF_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 */
  FRESULT f_setcp (WORD cp);                                          /* Set current code page */
  
  #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)
  #define f_rmdir(path) f_unlink(path)
  #define f_unmount(path) f_mount(0, path, 0)
  
  #ifndef EOF
  #define EOF (-1)
  #endif
  
  
  
  
  /*--------------------------------------------------------------*/
  /* Additional user defined functions                            */
  
  /* RTC function */
  #if !FF_FS_READONLY && !FF_FS_NORTC
  DWORD get_fattime (void);
  #endif
  
  /* LFN support functions */
  #if FF_USE_LFN >= 1                     /* Code conversion (defined in unicode.c) */
  WCHAR ff_oem2uni (WCHAR oem, WORD cp);  /* OEM code to Unicode conversion */
  WCHAR ff_uni2oem (DWORD uni, WORD cp);  /* Unicode to OEM code conversion */
  DWORD ff_wtoupper (DWORD uni);          /* Unicode upper-case conversion */
  #endif
  #if FF_USE_LFN == 3                     /* Dynamic memory allocation */
  void* ff_memalloc (UINT msize);         /* Allocate memory block */
  void ff_memfree (void* mblock);         /* Free memory block */
  #endif
  
  /* Sync functions */
  #if FF_FS_REENTRANT
  int ff_cre_syncobj (FATFS *fatfs, FF_SYNC_t* sobj); /* Create a sync object */
  int ff_req_grant (FF_SYNC_t sobj);      /* Lock sync object */
  void ff_rel_grant (FF_SYNC_t sobj);     /* Unlock sync object */
  int ff_del_syncobj (FF_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 /* FF_DEFINED */
  