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nb_ff.cpp
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/*----------------------------------------------------------------------------/
/ FatFs - Generic FAT file system module R0.12c /
/-----------------------------------------------------------------------------/
/
/ Copyright (C) 2017, 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.
/----------------------------------------------------------------------------*/
// #include "nb_ff.h" /* Declarations of FatFs API */ // Included with Defs
// #include "nb_diskio.h" /* Declarations of device I/O functions */ // Included with Defs
#include "nb_ff_Defs.h"
namespace FatFS_NB {
/*--------------------------------------------------------------------------
Module Private Definitions
---------------------------------------------------------------------------*/
#if _NB_FATFS != 68300 /* Revision ID */
#error Wrong include file (ff.h).
#endif
/*--------------------------------------------------------------------------
Module Private Work Area
---------------------------------------------------------------------------*/
/* Remark: Variables defined here without initial value shall be guaranteed
/ zero/null at start-up. If not, the linker option or start-up routine is
/ not compliance with C standard. */
#if _NB_VOLUMES < 1 || _NB_VOLUMES > 10
#error Wrong _NB_VOLUMES setting
#endif
static FATFS *FatFs[_NB_VOLUMES]; /* Pointer to the file system objects (logical drives) */
static WORD Fsid; /* File system mount ID */
#if _NB_FS_RPATH != 0 && _NB_VOLUMES >= 2
static BYTE CurrVol; /* Current drive */
#endif
#if _NB_FS_LOCK != 0
static FILESEM Files[_NB_FS_LOCK]; /* Open object lock semaphores */
#endif
#if _NB_USE_LFN == 0 /* Non-LFN configuration */
#define DEF_NAMBUF
#define INIT_NAMBUF(fs)
#define FREE_NAMBUF()
#else /* LFN configuration */
#if _NB_MAX_LFN < 12 || _NB_MAX_LFN > 255
#error Wrong _MAX_LFN value
#endif
#define MAXDIRB(nc) ((nc + 44U) / 15 * SZDIRE)
#if _NB_USE_LFN == 1 /* LFN enabled with static working buffer */
#if _NB_FS_EXFAT
static BYTE DirBuf[MAXDIRB(_NB_MAX_LFN)]; /* Directory entry block scratchpad buffer */
#endif
static WCHAR LfnBuf[_NB_MAX_LFN + 1]; /* LFN enabled with static working buffer */
#define DEF_NAMBUF
#define INIT_NAMBUF(fs)
#define FREE_NAMBUF()
#elif _NB_USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */
#if _NB_FS_EXFAT
#define DEF_NAMBUF \
WCHAR lbuf[_MAX_LFN + 1]; \
BYTE dbuf[MAXDIRB(_MAX_LFN)];
#define INIT_NAMBUF(fs) \
{ \
(fs)->lfnBuffer = lbuf; \
(fs)->dirBuffer = dbuf; \
}
#define FREE_NAMBUF()
#else
#define DEF_NAMBUF WCHAR lbuf[_MAX_LFN + 1];
#define INIT_NAMBUF(fs) \
{ \
(fs)->lfnBuffer = lbuf; \
}
#define FREE_NAMBUF()
#endif
#elif _NB_USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */
#if _NB_FS_EXFAT
#define DEF_NAMBUF WCHAR *lfn;
#define INIT_NAMBUF(fs) \
{ \
lfn = ff_memalloc((_MAX_LFN + 1) * 2 + MAXDIRB(_MAX_LFN)); \
if (!lfn) \
LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); \
(fs)->lfnBuffer = lfn; \
(fs)->dirBuffer = (BYTE *)(lfn + _MAX_LFN + 1); \
}
#define FREE_NAMBUF() ff_memfree(lfn)
#else
#define DEF_NAMBUF WCHAR *lfn;
#define INIT_NAMBUF(fs) \
{ \
lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
if (!lfn) \
LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); \
(fs)->lfnBuffer = lfn; \
}
#define FREE_NAMBUF() ff_memfree(lfn)
#endif
#else
#error Wrong _USE_LFN setting
#endif
#endif /* else _USE_LFN == 0 */
#ifdef _EXCVT
static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */
#endif
static void *voidPtr;
static DWORD getFatValue;
static DWORD findBitmapValue;
static DWORD createChainValue;
static BYTE checkFS_Value;
static int putc_flush_Value;
static FRESULT fResult = FR_NOT_READY;
const uint8_t maxCallbacks = 10;
static volatile uint8_t callbackCounter = 0;
static void (*callbackFunctions[maxCallbacks])(void*);
static void *voidDatasets[maxCallbacks];
static volatile bool pollingMode = false;
static volatile bool pollCallReady = false;
static volatile bool busy = false;
static void addCallback(void (*callback)(void*), void *data) {
busy = true;
if (callbackCounter >= maxCallbacks) {
// Error
} else {
callbackFunctions[callbackCounter] = callback;
voidDatasets[callbackCounter] = data;
callbackCounter = callbackCounter + 1;
}
}
static void callNextCallback() {
if(!pollingMode){
if (callbackCounter > 0 && callbackCounter < 11) {
callbackCounter = callbackCounter - 1;
callbackFunctions[callbackCounter](voidDatasets[callbackCounter]);
if(callbackCounter == 0){
busy = false;
}
} else {
// Error
}
}else{
pollCallReady = true;
}
}
void setPollingMode(bool mode){
pollingMode = mode;
}
bool getPollingCallReady(){
return pollCallReady;
}
void pollingModeCall(){
if(busy && pollCallReady){
if (callbackCounter > 0 && callbackCounter < 11) {
pollCallReady = false;
callbackCounter = callbackCounter - 1;
callbackFunctions[callbackCounter](voidDatasets[callbackCounter]);
if(callbackCounter == 0){
busy = false;
}
} else {
// Error
}
}
}
bool getBusy(){
return busy;
}
/*--------------------------------------------------------------------------
Module Private Functions
---------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* Load/Store multi-byte word in the FAT structure */
/*-----------------------------------------------------------------------*/
static WORD ld_word(const BYTE *ptr) /* Load a 2-byte little-endian word */
{
WORD rv;
rv = ptr[1];
rv = rv << 8 | ptr[0];
return rv;
}
static DWORD ld_dword(const BYTE *ptr) /* Load a 4-byte little-endian word */
{
DWORD rv;
rv = ptr[3];
rv = rv << 8 | ptr[2];
rv = rv << 8 | ptr[1];
rv = rv << 8 | ptr[0];
return rv;
}
#if _NB_FS_EXFAT
static QWORD ld_qword(const BYTE *ptr) /* Load an 8-byte little-endian word */
{
QWORD rv;
rv = ptr[7];
rv = rv << 8 | ptr[6];
rv = rv << 8 | ptr[5];
rv = rv << 8 | ptr[4];
rv = rv << 8 | ptr[3];
rv = rv << 8 | ptr[2];
rv = rv << 8 | ptr[1];
rv = rv << 8 | ptr[0];
return rv;
}
#endif
#if !_NB_FS_READONLY
static void st_word(BYTE *ptr, WORD val) /* Store a 2-byte word in little-endian */
{
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
}
static void st_dword(BYTE *ptr, DWORD val) /* Store a 4-byte word in little-endian */
{
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
}
#if _NB_FS_EXFAT
static void st_qword(BYTE *ptr, QWORD val) /* Store an 8-byte word in little-endian */
{
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
val >>= 8;
*ptr++ = (BYTE) val;
}
#endif
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* 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 (cnt) {
do {
*d++ = *s++;
} while (--cnt);
}
}
/* Fill memory block */
static void mem_set(void *dst, int val, UINT cnt) {
BYTE *d = (BYTE*) dst;
do {
*d++ = (BYTE) val;
} while (--cnt);
}
/* Compare memory block */
static int mem_cmp(const void *dst, const void *src, UINT cnt) { /* ZR:same, NZ:different */
const BYTE *d = (const BYTE*) dst, *s = (const BYTE*) src;
int r = 0;
do {
r = *d++ - *s++;
} while (--cnt && r == 0);
return r;
}
/* Check if chr is contained in the string */
static int chk_chr(const char *str, int chr) { /* NZ:contained, ZR:not contained */
while (*str && *str != chr)
str++;
return *str;
}
#if _NB_FS_REENTRANT
#error
/*-----------------------------------------------------------------------*/
/* Request/Release grant to access the volume */
/*-----------------------------------------------------------------------*/
static int lock_fs(
FATFS *fs /* File system object */
)
{
return (fs && ff_req_grant(fs->sobj)) ? 1 : 0;
}
static void unlock_fs(
FATFS *fs, /* File system object */
FRESULT res /* Result code to be returned */
)
{
if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT)
{
ff_rel_grant(fs->sobj);
}
}
#endif
#if _NB_FS_LOCK != 0
/*-----------------------------------------------------------------------*/
/* File lock control functions */
/*-----------------------------------------------------------------------*/
static FRESULT chk_lock( /* Check if the file can be accessed */
DIR *dp, /* Directory object pointing the file to be checked */
int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */
) {
UINT i, be;
/* Search file semaphore table */
for (i = be = 0; i < _NB_FS_LOCK; i++) {
if (Files[i].fs) { /* Existing entry */
if (Files[i].fs == dp->obj.fs && /* Check if the object matched with an open object */
Files[i].clu == dp->obj.startCluster && Files[i].ofs == dp->currentReadWriteOffset)
break;
} else { /* Blank entry */
be = 1;
}
}
if (i == _NB_FS_LOCK) { /* The object is not opened */
return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */
}
/* The object 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(void) /* Check if an entry is available for a new object */
{
UINT i;
for (i = 0; i < _NB_FS_LOCK && Files[i].fs; i++)
;
return (i == _NB_FS_LOCK) ? 0 : 1;
}
static UINT inc_lock( /* Increment object open counter and returns its index (0:Internal error) */
DIR *dp, /* Directory object pointing the file to register or increment */
int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
) {
UINT i;
for (i = 0; i < _NB_FS_LOCK; i++) { /* Find the object */
if (Files[i].fs == dp->obj.fs && Files[i].clu == dp->obj.startCluster && Files[i].ofs == dp->currentReadWriteOffset)
break;
}
if (i == _NB_FS_LOCK) { /* Not opened. Register it as new. */
for (i = 0; i < _NB_FS_LOCK && Files[i].fs; i++)
;
if (i == _NB_FS_LOCK)
return 0; /* No free entry to register (int err) */
Files[i].fs = dp->obj.fs;
Files[i].clu = dp->obj.startCluster;
Files[i].ofs = dp->currentReadWriteOffset;
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 object open counter */
UINT i /* Semaphore index (1..) */
) {
WORD n;
FRESULT res;
if (--i < _NB_FS_LOCK) { /* Shift index number origin from 0 */
n = Files[i].ctr;
if (n == 0x100)
n = 0; /* If write mode open, delete the entry */
if (n > 0)
n--; /* Decrement read mode open count */
Files[i].ctr = n;
if (n == 0)
Files[i].fs = 0; /* Delete the entry if open count gets zero */
res = FR_OK;
} else {
res = FR_INT_ERROR; /* Invalid index nunber */
}
return res;
}
static void clear_lock(/* Clear lock entries of the volume */
FATFS *fs) {
UINT i;
for (i = 0; i < _NB_FS_LOCK; i++) {
if (Files[i].fs == fs)
Files[i].fs = 0;
}
}
#endif /* _NB_FS_LOCK != 0 */
/*-----------------------------------------------------------------------*/
/* Move/Flush disk access window in the file system object */
/*-----------------------------------------------------------------------*/
#if !_NB_FS_READONLY
struct sync_window_strut {
FATFS *fs;
DWORD wsect;
UINT nf;
};
static void sync_window_loop(sync_window_strut *strut) {
if (strut->nf >= 2) { /* Reflect the change to all FAT copies */
strut->wsect += strut->fs->fatSectorSize;
voidPtr = strut;
disk_write(strut->fs->driveNumber, strut->fs->win, strut->wsect, 1, [](DRESULT dRes) {
sync_window_strut *strut = ((sync_window_strut*) voidPtr);
strut->nf--;
sync_window_loop(strut);
return;
});
return;
} else {
delete strut;
callNextCallback();
return;
}
}
static void sync_window(FATFS *fs, void (*callback)(void*), void *data) {
sync_window_strut *s = new sync_window_strut();
s->fs = fs;
voidPtr = s;
fResult = FR_OK;
addCallback(callback, data);
if (s->fs->wflag) { /* Write back the sector if it is dirty */
voidPtr = s;
disk_write(s->fs->driveNumber, s->fs->win, s->fs->winSector, 1, [](DRESULT dRes) {
sync_window_strut *strut = ((sync_window_strut*) voidPtr);
strut->wsect = strut->fs->winSector;
if (dRes != RES_OK) {
fResult = FR_DISK_ERROR;
} else {
strut->fs->wflag = 0;
if (strut->wsect - strut->fs->fatBaseSector < strut->fs->fatSectorSize) { /* Is it in the FAT area? */
strut->nf = strut->fs->n_fats;
sync_window_loop(strut);
return;
}
}
delete strut;
callNextCallback();
return;
});
return;
}
delete s;
callNextCallback();
return;
}
#endif
struct move_window_strut {
FATFS *fs;
DWORD sector;
};
static void move_window(/* Returns FR_OK or FR_DISK_ERROR */
FATFS *fs, DWORD sector, /* Sector number to make appearance in the fs->win[] */
void (*callback)(void*), void *data) {
move_window_strut *s = new move_window_strut();
fResult = FR_OK;
s->fs = fs;
s->sector = sector;
addCallback(callback, data);
if (s->sector != s->fs->winSector) { /* Window offset changed? */
#if !_NB_FS_READONLY
sync_window(s->fs, [](void *data) { /* Write-back changes */
move_window_strut *strut = ((move_window_strut*) data);
#endif
if (fResult == FR_OK) { /* Fill sector window with new data */
voidPtr = strut;
disk_read(strut->fs->driveNumber, strut->fs->win, strut->sector, 1, [](DRESULT dRes) {
move_window_strut *strut = ((move_window_strut*) voidPtr);
if (dRes != RES_OK) {
strut->sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */
fResult = FR_DISK_ERROR;
}
strut->fs->winSector = strut->sector;
delete strut;
callNextCallback();
return;
});
return;
}
delete strut;
callNextCallback();
return;
#if !_NB_FS_READONLY
}, s);
return;
#endif
}
delete s;
callNextCallback();
return;
}
#if !_NB_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Synchronize file system and strage device */
/*-----------------------------------------------------------------------*/
struct sync_fs_strut {
FATFS *fs;
};
static void sync_fs(FATFS *fs, /* FR_OK:succeeded, !=0:error */
void (*callback)(void*), void *data /* File system object */
) {
sync_fs_strut *s = new sync_fs_strut();
s->fs = fs;
addCallback(callback, data);
sync_window(s->fs, [](void *data) {
sync_fs_strut *strut = ((sync_fs_strut*) data);
if (fResult == FR_OK) {
/* Update FSInfo sector if needed */
if (strut->fs->fs_type == FS_FAT32 && strut->fs->fsi_flag == 1) {
/* Create FSInfo structure */
mem_set(strut->fs->win, 0, SS(strut->fs));
st_word(strut->fs->win + BS_55AA, 0xAA55);
st_dword(strut->fs->win + FSI_LeadSig, 0x41615252);
st_dword(strut->fs->win + FSI_StrucSig, 0x61417272);
st_dword(strut->fs->win + FSI_Free_Count, strut->fs->numberOfFreeClusters);
st_dword(strut->fs->win + FSI_Nxt_Free, strut->fs->lastCluster);
/* Write it into the FSInfo sector */
strut->fs->winSector = strut->fs->volBaseSector + 1;
voidPtr = strut;
disk_write(strut->fs->driveNumber, strut->fs->win, strut->fs->winSector, 1, [](DRESULT dRes) {
sync_fs_strut *strut = ((sync_fs_strut*) voidPtr);
strut->fs->fsi_flag = 0;
/* Make sure that no pending write process in the physical drive */
if (disk_ioctl(strut->fs->driveNumber, CTRL_SYNC, 0) != RES_OK) {
fResult = FR_DISK_ERROR;
}
delete strut;
callNextCallback();
return;
});
return;
}
/* Make sure that no pending write process in the physical drive */
if (disk_ioctl(strut->fs->driveNumber, CTRL_SYNC, 0) != RES_OK) {
fResult = FR_DISK_ERROR;
}
delete strut;
callNextCallback();
return;
} else {
delete strut;
callNextCallback();
return;
}
}, s);
return;
}
#endif
/*-----------------------------------------------------------------------*/
/* Get sector# from cluster# */
/*-----------------------------------------------------------------------*/
static 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->numberOfFatEntries - 2){
return 0; /* Invalid cluster# */
}
return clst * fs->clusterSize + fs->dataBaseSector;
}
/*-----------------------------------------------------------------------*/
/* FAT access - Read value of a FAT entry */
/*-----------------------------------------------------------------------*/
struct get_fat_strut {
_FDID *obj;
DWORD clst;
UINT wc, bc;
DWORD val;
FATFS *fs;
};
static void get_fat( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */
_FDID *obj, /* Corresponding object */
DWORD clst, /* Cluster number to get the value */
void (*callback)(void*), void *data) {
get_fat_strut *s = new get_fat_strut();
s->obj = obj;
s->clst = clst;
s->fs = obj->fs;
addCallback(callback, data);
if (s->clst < 2 || s->clst >= s->fs->numberOfFatEntries) { /* Check if in valid range */
getFatValue = 1; /* Internal error */
delete s;
callNextCallback();
return;
} else {
getFatValue = 0xFFFFFFFF; /* Default value falls on disk error */
switch (s->fs->fs_type) {
case FS_FAT12:
// bc = (UINT)clst; bc += bc / 2;
// if (move_window(fs, fs->fatBaseSector + (bc / SS(fs))) != FR_OK) break;
// wc = fs->win[bc++ % SS(fs)];
// if (move_window(fs, fs->fatBaseSector + (bc / SS(fs))) != FR_OK) break;
// wc |= fs->win[bc % SS(fs)] << 8;
// val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
break;
case FS_FAT16:
move_window(s->fs, s->fs->fatBaseSector + (s->clst / (SS(s->fs) / 2)),
[](void *data){
get_fat_strut *strut = ((get_fat_strut*) data);
if (fResult == FR_OK){
getFatValue = ld_word(strut->fs->win + strut->clst * 2 % SS(strut->fs));
}
delete strut;
callNextCallback();
return;
},s);
return;
case FS_FAT32:
move_window(s->fs, s->fs->fatBaseSector + (s->clst / (SS(s->fs) / 4)), [](void *data) {
get_fat_strut *strut = ((get_fat_strut*) data);
if (fResult == FR_OK) {
getFatValue = ld_dword(strut->fs->win + strut->clst * 4 % SS(strut->fs)) & 0x0FFFFFFF;
}
delete strut;
callNextCallback();
return;
}, s);
return;
#if _NB_FS_EXFAT
case FS_EXFAT:
if (s->obj->objSize) {
DWORD cofs = s->clst - s->obj->startCluster; /* Offset from start cluster */
DWORD clen = (DWORD) ((s->obj->objSize - 1) / SS(s->fs)) / s->fs->clusterSize; /* Number of clusters - 1 */
if (s->obj->stat == 2) { /* Is there no valid chain on the FAT? */
if (cofs <= clen) {
getFatValue = (cofs == clen) ? 0x7FFFFFFF : s->clst + 1; /* Generate the value */
break;
}
}
if (s->obj->stat == 3 && cofs < s->obj->firstFragSize) { /* Is it in the 1st fragment? */
getFatValue = s->clst + 1; /* Generate the value */
break;
}
if (s->obj->stat != 2) { /* Get value from FAT if FAT chain is valid */
if (s->obj->lastFragSize != 0) { /* Is it on the growing edge? */
getFatValue = 0x7FFFFFFF; /* Generate EOC */
} else {
move_window(s->fs, s->fs->fatBaseSector + (s->clst / (SS(s->fs) / 4)), [](void *data) {
get_fat_strut *strut = ((get_fat_strut*) data);
if (fResult == FR_OK) {
getFatValue = ld_dword(strut->fs->win + strut->clst * 4 % SS(strut->fs)) & 0x7FFFFFFF;
}
delete strut;
callNextCallback();
return;
}, s);
return;
}
break;
}
}
/* go to default */
#endif
default:
getFatValue = 1; /* Internal error */
}
delete s;
callNextCallback();
return;
}
}
#if !_NB_FS_READONLY
/*-----------------------------------------------------------------------*/
/* FAT access - Change value of a FAT entry */
/*-----------------------------------------------------------------------*/
struct put_fat_strut {
FATFS *fs;
DWORD clst;
DWORD val;
UINT bc;
BYTE *p;
};
static void put_fat(/* FR_OK(0):succeeded, !=0:error */
FATFS *fs, DWORD clstInput, /* FAT index number (cluster number) to be changed */
DWORD val, /* New value to be set to the entry */
void (*callback)(void*), void *data) {
put_fat_strut *s = new put_fat_strut();
s->clst = clstInput;
s->val = val;
s->fs = fs;
addCallback(callback, data);
fResult = FR_INT_ERROR;
if (s->clst >= 2 && s->clst < s->fs->numberOfFatEntries) { /* Check if in valid range */
switch (s->fs->fs_type) {
case FS_FAT12: /* Bitfield items */
// bc = (UINT)clst; bc += bc / 2;
// res = move_window(fs, fs->fatBaseSector + (bc / SS(fs)));
// if (res != FR_OK) break;
// p = fs->win + bc++ % SS(fs);
// *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
// fs->wflag = 1;
// res = move_window(fs, fs->fatBaseSector + (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));
// fs->wflag = 1;
break;
case FS_FAT16: /* WORD aligned items */
// res = move_window(fs, fs->fatBaseSector + (clst / (SS(fs) / 2)));
// if (res != FR_OK) break;
// st_word(fs->win + clst * 2 % SS(fs), (WORD)val);
// fs->wflag = 1;
break;
case FS_FAT32: /* DWORD aligned items */
#if _NB_FS_EXFAT
case FS_EXFAT:
#endif
move_window(s->fs, s->fs->fatBaseSector + (s->clst / (SS(s->fs) / 4)), [](void *data) {
put_fat_strut *strut = ((put_fat_strut*) data);
if (fResult == FR_OK) {
if (!_NB_FS_EXFAT || strut->fs->fs_type != FS_EXFAT) {
strut->val = (strut->val & 0x0FFFFFFF) | (ld_dword(strut->fs->win + strut->clst * 4 % SS(strut->fs)) & 0xF0000000);
}
st_dword(strut->fs->win + strut->clst * 4 % SS(strut->fs), strut->val);
strut->fs->wflag = 1;
}
delete strut;
callNextCallback();
return;
}, s);
return;
}
}
delete s;
callNextCallback();
return;
}
#endif /* !_FS_READONLY */
#if _NB_FS_EXFAT && !_NB_FS_READONLY
/*-----------------------------------------------------------------------*/
/* exFAT: Accessing FAT and Allocation Bitmap */
/*-----------------------------------------------------------------------*/
/*--------------------------------------*/
/* Find a contiguous free cluster block */
/*--------------------------------------*/
struct find_bitmap_strut {
FATFS *fs;
DWORD clst;
DWORD ncl;
BYTE bm;
BYTE bv;
UINT i;
DWORD val;
DWORD scl;
DWORD ctr;
};
static void find_bitmap_loop(find_bitmap_strut *strut) {
move_window(strut->fs, strut->fs->dataBaseSector + strut->val / 8 / SS(strut->fs), [](void *data) {
find_bitmap_strut *strut = ((find_bitmap_strut*) data);
if (fResult == FR_OK) {
UINT i;
i = strut->val / 8 % SS(strut->fs);
strut->bm = 1 << (strut->val % 8);
do {
do {
strut->bv = strut->fs->win[i] & strut->bm;
strut->bm <<= 1; /* Get bit value */
if (++strut->val >= strut->fs->numberOfFatEntries - 2) { /* Next cluster (with wrap-around) */
strut->val = 0;
strut->bm = 0;
i = SS(strut->fs);
}
if (!strut->bv) { /* Is it a free cluster? */
if (++strut->ctr == strut->ncl) { /* Check if run length is sufficient for required */
findBitmapValue = strut->scl + 2;
delete strut;
callNextCallback();
return;
}
} else {
strut->scl = strut->val;
strut->ctr = 0; /* Encountered a cluster in-use, restart to scan */
}
if (strut->val == strut->clst) { /* All cluster scanned? */
findBitmapValue = 0;
delete strut;
callNextCallback();
return;
}
} while (strut->bm);
strut->bm = 1;
} while (++i < SS(strut->fs));
find_bitmap_loop(strut);
return;
} else {
findBitmapValue = 0xFFFFFFFF;
delete strut;
callNextCallback();
return;
}
}, strut);
return;
}
static void find_bitmap( /* 0:Not found, 2..:Cluster block found, 0xFFFFFFFF:Disk error */
FATFS *fs, /* File system object */
DWORD clst, /* Cluster number to scan from */
DWORD ncl, /* Number of contiguous clusters to find (1..) */
void (*callback)(void*), void *data) {
find_bitmap_strut *s = new find_bitmap_strut();
s->ncl = ncl;
s->clst = clst;
s->fs = fs;
addCallback(callback, data);
s->clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */
if (s->clst >= s->fs->numberOfFatEntries - 2) {
s->clst = 0;
}
s->scl = s->val = s->clst;
s->ctr = 0;
find_bitmap_loop(s);
return;
}
/*----------------------------------------*/
/* Set/Clear a block of allocation bitmap */
/*----------------------------------------*/
struct change_bitmap_strut {
FATFS *fs;
DWORD clst;
DWORD ncl;
int bv;
BYTE bm;
UINT i;
DWORD sect;
};
void change_bitmap_loop(change_bitmap_strut *strut) {
move_window(strut->fs, strut->sect++, [](void *data) {
change_bitmap_strut *strut = ((change_bitmap_strut*) data);
if (fResult == FR_OK) {
do {
do {
if (strut->bv == (int) ((strut->fs->win[strut->i] & strut->bm) != 0)) {
fResult = FR_INT_ERROR;
delete strut;
callNextCallback();
return;
} /* Is the bit expected value? */
strut->fs->win[strut->i] ^= strut->bm; /* Flip the bit */
strut->fs->wflag = 1;
if (--strut->ncl == 0) {
fResult = FR_OK; /* All bits processed? */
delete strut;
callNextCallback();
return;
}
} while (strut->bm <<= 1); /* Next bit */
strut->bm = 1;
} while (++strut->i < SS(strut->fs)); /* Next byte */
strut->i = 0;
change_bitmap_loop(strut);
return;
} else {
fResult = FR_DISK_ERROR;
delete strut;
callNextCallback();
return;
}
}, strut);
return;
}
static void change_bitmap(FATFS *fs, /* File system object */
DWORD clst, /* Cluster number to change from */
DWORD ncl, /* Number of clusters to be changed */
int bv, /* bit value to be set (0 or 1) */
void (*callback)(void*), void *data) {
change_bitmap_strut *s = new change_bitmap_strut();
s->ncl = ncl;
s->clst = clst;
s->bv = bv;
s->fs = fs;
s->clst -= 2; /* The first bit corresponds to cluster #2 */
s->sect = s->fs->dataBaseSector + s->clst / 8 / SS(s->fs); /* Sector address (assuming bitmap is located top of the cluster heap) */
s->i = s->clst / 8 % SS(s->fs); /* Byte offset in the sector */
s->bm = 1 << (s->clst % 8); /* Bit mask in the byte */
addCallback(callback, data);
change_bitmap_loop(s);
return;
}
/*---------------------------------------------*/
/* Fill the first fragment of the FAT chain */
/*---------------------------------------------*/
struct fill_first_frag_strut {
_FDID *obj;
DWORD cl;
DWORD n;
};