int FATFileHandle::fsync() {
FFSDEBUG("fsync()\n");
FRESULT res = f_sync(&_fh);
if (res) {
FFSDEBUG("f_sync() failed (%d, %s)\n", res, FR_ERRORS[res]);
return -1;
}
return 0;
}
ssize_t FATFileHandle::read(void* buffer, size_t length) {
FFSDEBUG("read(%d)\n", length);
UINT n;
FRESULT res = f_read(&_fh, buffer, length, &n);
if(res) {
FFSDEBUG("f_read() failed (%d, %s)\n", res, FR_ERRORS[res]);
return -1;
}
return n;
}
ssize_t FATFileHandle::write(const void* buffer, size_t length) {
FFSDEBUG("write(%d)\n", length);
UINT n;
FRESULT res = f_write(&_fh, buffer, length, &n);
if(res) {
FFSDEBUG("f_write() failed (%d, %s)", res, FR_ERRORS[res]);
return -1;
}
return n;
}
DRESULT disk_ioctl (
BYTE drv, /* Physical drive nmuber (0..) */
BYTE ctrl, /* Control code */
void *buff /* Buffer to send/receive control data */
)
{
FFSDEBUG("disk_ioctl(%d)\n", ctrl);
switch(ctrl) {
case CTRL_SYNC:
if(FATFileSystem::_ffs[drv] == NULL) {
return RES_NOTRDY;
} else if(FATFileSystem::_ffs[drv]->disk_sync()) {
return RES_ERROR;
}
return RES_OK;
case GET_SECTOR_COUNT:
if(FATFileSystem::_ffs[drv] == NULL) {
return RES_NOTRDY;
} else {
int res = FATFileSystem::_ffs[drv]->disk_sectors();
if(res > 0) {
*((DWORD*)buff) = res; // minimum allowed
return RES_OK;
} else {
return RES_ERROR;
}
}
case GET_BLOCK_SIZE:
*((DWORD*)buff) = 1; // default when not known
return RES_OK;
}
return RES_PARERR;
}
DSTATUS disk_status (
BYTE drv /* Physical drive nmuber (0..) */
)
{
FFSDEBUG("disk_status on drv [%d]\n", drv);
return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
}
off_t FATFileHandle::lseek(off_t position, int whence) {
FFSDEBUG("lseek(%i,%i)\n",position,whence);
if(whence == SEEK_END) {
position += _fh.fsize;
} else if(whence==SEEK_CUR) {
position += _fh.fptr;
}
FRESULT res = f_lseek(&_fh, position);
if(res) {
FFSDEBUG("lseek failed (%d, %s)\n", res, FR_ERRORS[res]);
return -1;
} else {
FFSDEBUG("lseek OK, returning %i\n", _fh.fptr);
return _fh.fptr;
}
}
DRESULT disk_write (
BYTE drv, /* Physical drive nmuber (0..) */
const BYTE *buff, /* Data to be written */
DWORD sector, /* Sector address (LBA) */
BYTE count /* Number of sectors to write (1..255) */
)
{
FFSDEBUG("disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
for(unsigned int s=sector; s<sector+count; s++) {
FFSDEBUG(" disk_write(sector %d)\n", s);
int res = FATFileSystem::_ffs[drv]->disk_write((char*)buff, sector);
if(res) {
return RES_PARERR;
}
buff += 512;
}
return RES_OK;
}
off_t FATFileHandle::flen() {
FFSDEBUG("flen\n");
return _fh.fsize;
}
int FATFileHandle::close() {
FFSDEBUG("close\n");
int retval = f_close(&_fh);
delete this;
return retval;
}
