/*---------------------------------------------------------------------------/
/  FatFs - FAT file system module include file  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 trems.
/
/  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 product UNDER YOUR RESPONSIBILITY.
/ * Redistributions of source code must retain the above copyright notice.
/
/----------------------------------------------------------------------------*/

#ifndef _FATFS
#define _FATFS    8237    /* Revision ID */

#ifdef __cplusplus
extern "C" {
#endif

#include "integer.h"    /* Basic integer types */
#include "ffconf.h"        /* FatFs configuration options */

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



#define _DRIVES        4
/* Number of logical drives to be used. This affects the size of internal table. */
/* Definitions of volume management */

#if _MULTI_PARTITION        /* Multiple partition configuration */
#define LD2PD(vol) (VolToPart[vol].pd)    /* Get physical drive# */
#define LD2PT(vol) (VolToPart[vol].pt)    /* Get partition# */
typedef struct {
    BYTE pd;    /* Physical drive# */
    BYTE pt;    /* Partition # (0-3) */
} PARTITION;
extern const PARTITION VolToPart[];    /* Volume - Physical location resolution table */

#else                        /* Single partition configuration */
#define LD2PD(vol) (vol)    /* Logical drive# is bound to the same physical drive# */
#define LD2PT(vol) 0        /* Always mounts the 1st partition */

#endif



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

#if _LFN_UNICODE            /* Unicode string */
#if !_USE_LFN
#error _LFN_UNICODE must be 0 in 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



/* File system object structure (FATFS) */

typedef struct {
    BYTE    fs_type;        /* FAT sub-type (0:Not mounted) */
    BYTE    drv;            /* Physical drive number */
    BYTE    csize;            /* Sectors per cluster (1,2,4...128) */
    BYTE    n_fats;            /* Number of FAT copies (1,2) */
    BYTE    wflag;            /* win[] dirty flag (1:must be written back) */
    BYTE    fsi_flag;        /* fsinfo dirty flag (1:must be written back) */
    WORD    id;                /* File system mount ID */
    WORD    n_rootdir;        /* Number of root directory entries (FAT12/16) */
#if _MAX_SS != 512
    WORD    ssize;            /* Bytes per sector (512,1024,2048,4096) */
#endif
#if _FS_REENTRANT
    _SYNC_t    sobj;            /* Identifier of sync object */
#endif
#if !_FS_READONLY
    DWORD    last_clust;        /* Last allocated cluster */
    DWORD    free_clust;        /* Number of free clusters */
    DWORD    fsi_sector;        /* fsinfo sector (FAT32) */
#endif
#if _FS_RPATH
    DWORD    cdir;            /* Current directory start cluster (0:root) */
#endif
    DWORD    n_fatent;        /* Number of FAT entries (= number of clusters + 2) */
    DWORD    fsize;            /* Sectors per FAT */
    DWORD    fatbase;        /* FAT start sector */
    DWORD    dirbase;        /* Root directory start sector (FAT32:Cluster#) */
    DWORD    database;        /* Data start sector */
    DWORD    winsect;        /* Current sector appearing in the win[] */
    BYTE    win[_MAX_SS];    /* Disk access window for Directory, FAT (and Data on tiny cfg) */
} FATFS;



/* File object structure (FIL) */

typedef struct {
    FATFS*    fs;                /* Pointer to the owner file system object */
    WORD    id;                /* Owner file system mount ID */
    BYTE    flag;            /* File status flags */
    BYTE    pad1;
    DWORD    fptr;            /* File read/write pointer (0 on file open) */
    DWORD    fsize;            /* File size */
    DWORD    sclust;            /* File start cluster (0 when fsize==0) */
    DWORD    clust;            /* Current cluster */
    DWORD    dsect;            /* Current data sector */
#if !_FS_READONLY
    DWORD    dir_sect;        /* Sector containing the directory entry */
    BYTE*    dir_ptr;        /* Ponter to the directory entry in the window */
#endif
#if _USE_FASTSEEK
    DWORD*    cltbl;            /* Pointer to the cluster link map table (null on file open) */
#endif
#if _FS_SHARE
    UINT    lockid;            /* File lock ID (index of file semaphore table) */
#endif
#if !_FS_TINY
    BYTE    buf[_MAX_SS];    /* File data read/write buffer */
#endif
} FIL_t;



/* Directory object structure (DIR) */

typedef struct {
    FATFS*    fs;                /* Pointer to the owner file system object */
    WORD    id;                /* Owner file system mount ID */
    WORD    index;            /* Current read/write index number */
    DWORD    sclust;            /* Table start cluster (0:Root dir) */
    DWORD    clust;            /* Current cluster */
    DWORD    sect;            /* Current sector */
    BYTE*    dir;            /* Pointer to the current SFN entry in the win[] */
    BYTE*    fn;                /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
#if _USE_LFN
    WCHAR*    lfn;            /* Pointer to the LFN working buffer */
    WORD    lfn_idx;        /* Last matched LFN index number (0xFFFF:No LFN) */
#endif
} DIR_t;



/* File status structure (FILINFO) */

typedef struct {
    DWORD    fsize;            /* File size */
    WORD    fdate;            /* Last modified date */
    WORD    ftime;            /* Last modified time */
    BYTE    fattrib;        /* Attribute */
    TCHAR    fname[13];        /* Short file name (8.3 format) */
#if _USE_LFN
    TCHAR*    lfname;            /* Pointer to the LFN buffer */
    UINT     lfsize;            /* Size of LFN buffer in TCHAR */
#endif
} FILINFO;



/* File function return code (FRESULT) */

typedef enum {
    FR_OK = 0,                /* (0) Succeeded */
    FR_DISK_ERR,            /* (1) A hard error occured 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) Acces denied due to prohibited access or directory full */
    FR_EXIST,                /* (8) Acces 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 on the physical drive */
    FR_MKFS_ABORTED,        /* (14) The f_mkfs() aborted due to any parameter error */
    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 shareing policy */
    FR_NOT_ENOUGH_CORE,        /* (17) LFN working buffer could not be allocated */
    FR_TOO_MANY_OPEN_FILES    /* (18) Number of open files > _FS_SHARE */
} FRESULT;



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

FRESULT f_mount (BYTE, FATFS*);                        /* Mount/Unmount a logical drive */
FRESULT f_open (FIL_t*, const TCHAR*, BYTE);            /* Open or create a file */
FRESULT f_read (FIL_t*, void*, UINT, UINT*);            /* Read data from a file */
FRESULT f_lseek (FIL_t*, DWORD);                        /* Move file pointer of a file object */
FRESULT f_close (FIL_t*);                                /* Close an open file object */
FRESULT f_opendir (DIR_t*, const TCHAR*);                /* Open an existing directory */
FRESULT f_readdir (DIR_t*, FILINFO*);                    /* Read a directory item */
FRESULT f_stat (const TCHAR*, FILINFO*);            /* Get file status */
FRESULT f_write (FIL_t*, const void*, UINT, UINT*);    /* Write data to a file */
FRESULT f_getfree (const TCHAR*, DWORD*, FATFS**);    /* Get number of free clusters on the drive */
FRESULT f_truncate (FIL_t*);                            /* Truncate file */
FRESULT f_sync (FIL_t*);                                /* Flush cached data of a writing file */
FRESULT f_unlink (const TCHAR*);                    /* Delete an existing file or directory */
FRESULT f_mkdir (const TCHAR*);                        /* Create a new directory */
FRESULT f_chmod (const TCHAR*, BYTE, BYTE);            /* Change attriburte of the file/dir */
FRESULT f_utime (const TCHAR*, const FILINFO*);        /* Change timestamp of the file/dir */
FRESULT f_rename (const TCHAR*, const TCHAR*);        /* Rename/Move a file or directory */
FRESULT f_forward (FIL_t*, UINT(*)(const BYTE*,UINT), UINT, UINT*);    /* Forward data to the stream */
FRESULT f_mkfs (BYTE, BYTE, UINT);                    /* Create a file system on the drive */
FRESULT f_chdrive (BYTE);                            /* Change current drive */
FRESULT f_chdir (const TCHAR*);                        /* Change current directory */
FRESULT f_getcwd (TCHAR*, UINT);                    /* Get current directory */
int f_putc (TCHAR, FIL_t*);                            /* Put a character to the file */
int f_puts (const TCHAR*, FIL_t*);                    /* Put a string to the file */
int f_printf (FIL_t*, const TCHAR*, ...);                /* Put a formatted string to the file */
TCHAR* f_gets (TCHAR*, int, FIL_t*);                    /* Get a string from the file */

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

#define f_eof(fp) (((fp)->fptr == (fp)->fsize) ? 1 : 0)
#define f_error(fp) (((fp)->flag & FA__ERROR) ? 1 : 0)
#define f_tell(fp) ((fp)->fptr)
#define f_size(fp) ((fp)->fsize)




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

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

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

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




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


/* File access control and file status flags (FIL.flag) */

#define    FA_READ                0x01
#define    FA_OPEN_EXISTING    0x00
#define FA__ERROR            0x80

#if !_FS_READONLY
#define    FA_WRITE            0x02
#define    FA_CREATE_NEW        0x04
#define    FA_CREATE_ALWAYS    0x08
#define    FA_OPEN_ALWAYS        0x10
#define FA__WRITTEN            0x20
#define FA__DIRTY            0x40
#endif


/* FAT sub type (FATFS.fs_type) */

#define FS_FAT12    1
#define FS_FAT16    2
#define FS_FAT32    3


/* File attribute bits for directory entry */

#define    AM_RDO    0x01    /* Read only */
#define    AM_HID    0x02    /* Hidden */
#define    AM_SYS    0x04    /* System */
#define    AM_VOL    0x08    /* Volume label */
#define AM_LFN    0x0F    /* LFN entry */
#define AM_DIR    0x10    /* Directory */
#define AM_ARC    0x20    /* Archive */
#define AM_MASK    0x3F    /* Mask of defined bits */


/* Fast seek function */
#define CREATE_LINKMAP    0xFFFFFFFF



/*--------------------------------*/
/* Multi-byte word access macros  */

#if _WORD_ACCESS == 1    /* Enable word access to the FAT structure */
#define    LD_WORD(ptr)        (WORD)(*(WORD*)(BYTE*)(ptr))
#define    LD_DWORD(ptr)        (DWORD)(*(DWORD*)(BYTE*)(ptr))
#define    ST_WORD(ptr,val)    *(WORD*)(BYTE*)(ptr)=(WORD)(val)
#define    ST_DWORD(ptr,val)    *(DWORD*)(BYTE*)(ptr)=(DWORD)(val)
#else                    /* Use byte-by-byte access to the FAT structure */
#define    LD_WORD(ptr)        (WORD)(((WORD)*((BYTE*)(ptr)+1)<<8)|(WORD)*(BYTE*)(ptr))
#define    LD_DWORD(ptr)        (DWORD)(((DWORD)*((BYTE*)(ptr)+3)<<24)|((DWORD)*((BYTE*)(ptr)+2)<<16)|((WORD)*((BYTE*)(ptr)+1)<<8)|*(BYTE*)(ptr))
#define    ST_WORD(ptr,val)    *(BYTE*)(ptr)=(BYTE)(val); *((BYTE*)(ptr)+1)=(BYTE)((WORD)(val)>>8)
#define    ST_DWORD(ptr,val)    *(BYTE*)(ptr)=(BYTE)(val); *((BYTE*)(ptr)+1)=(BYTE)((WORD)(val)>>8); *((BYTE*)(ptr)+2)=(BYTE)((DWORD)(val)>>16); *((BYTE*)(ptr)+3)=(BYTE)((DWORD)(val)>>24)
#endif

#ifdef __cplusplus
}
#endif

#endif /* _FATFS */
