if (DeviceIoControl (handle, IOCTL_DISK_GET_DRIVE_GEOMETRY,		       NULL, 0, &geo, sizeof (DISK_GEOMETRY), &len, NULL)&&len>0)    {      *size_in_bytes = geo.BytesPerSector;      return (OSAL_OK);    }  else
  {
	  DWORD nFree=0;
	  DWORD dwCylinders;
	  const char *name;
	  name=osal_get_device_name(handle);
	  if(name&&GetDiskFreeSpace(name,&geo.SectorsPerTrack,&geo.BytesPerSector,&nFree,&dwCylinders))
	  {
		  *size_in_bytes=geo.BytesPerSector;
		  return (OSAL_OK);
	  }
  }
  SetLastError(ERROR_EMPTY);  return (OSAL_ERR);}/**************************************************************/intosal_get_volume_sect_size (const char *volume_root,			   u_int32_t *size_in_bytes){  char volume [10]; /* copy drive letter and a slash - "C:\" */  char *p = volume, *end = volume + sizeof (volume) - 2;  while (*volume_root != '\\' && p < end)    *p++ = *volume_root++;  if (p < end)    {      DWORD sectors_per_clust, bytes_per_sect, free_clusters, total_clusters;      *p++ = '\\';      *p = '\0';      if (GetDiskFreeSpace (volume, &sectors_per_clust, &bytes_per_sect,			    &free_clusters, &total_clusters))	{	  *size_in_bytes = bytes_per_sect;	  return (OSAL_OK);	}      else	return (OSAL_ERR);    }  else    { /* if called with no volume name ask for full path */      char full_path [MAX_PATH], *dummy;      DWORD result = GetFullPathName (volume_root, MAX_PATH, full_path, &dummy);      if (result <= MAX_PATH)	return (osal_get_volume_sect_size (full_path, size_in_bytes));      else	return (RET_BAD_FORMAT);    }}/**************************************************************/intosal_get_file_size (osal_handle_t handle,		    u_int64_t *size_in_bytes){  LARGE_INTEGER size;  if (GetFileSizeEx (handle, &size))    {      *size_in_bytes = size.QuadPart;      return (OSAL_OK);    }  else    return (OSAL_ERR);}/**************************************************************/intosal_get_file_size_ex (const char *path,		       u_int64_t *size_in_bytes){  osal_handle_t in;  int result = osal_open (path, &in, 1);  if (result == OSAL_OK)    {      result = osal_get_file_size (in, size_in_bytes);      osal_close (in);    }  return (result);}/**************************************************************/intosal_seek (osal_handle_t handle,	   u_int64_t abs_pos){  LARGE_INTEGER offs;  offs.QuadPart = abs_pos;  return (SetFilePointerEx (handle, offs, NULL, FILE_BEGIN) ? OSAL_OK : OSAL_ERR);}/**************************************************************/int /* OSAL_OK, OSAL_ERR */osal_read (osal_handle_t handle,	   void *out,	   u_int32_t bytes,	   u_int32_t *stored){  DWORD len;  if (ReadFile (handle, out, bytes, &len, NULL))    {      *stored = len;      return (OSAL_OK);    }  else    return (OSAL_ERR);}/**************************************************************/int /* OSAL_OK, OSAL_ERR */osal_write (osal_handle_t handle,	    const void *in,	    u_int32_t bytes,	    u_int32_t *stored){  DWORD len;  if (WriteFile (handle, in, bytes, &len, NULL))    {      *stored = len;      return (OSAL_OK);    }  else    return (OSAL_ERR);}/**************************************************************/int /* OSAL_OK, OSAL_ERR */osal_close (osal_handle_t handle){
	if(handle!=INVALID_HANDLE_VALUE)
		UnregisterDevice(handle);  return (CloseHandle (handle) ? OSAL_OK : OSAL_ERR);}/**************************************************************/void*osal_alloc (u_int32_t bytes){  return (LocalAlloc (LMEM_FIXED, bytes));}/**************************************************************/voidosal_free (void *ptr){  if (ptr != NULL)    LocalFree (ptr);}/**************************************************************/intosal_query_hard_drives (osal_dlist_t **hard_drives){  u_int32_t i;  int result;  *hard_drives = NULL;  result = osal_dlist_alloc (hard_drives);  for (i=0; result == RET_OK && i<16; ++i)    {      char device_name [20];      HANDLE device;      sprintf (device_name, "\\\\.\\PhysicalDrive%u", (unsigned int) i);      if (osal_open (device_name, &device, TRUE) == OSAL_OK)	{ /* device exists */	  u_int64_t size_in_bytes;	  sprintf (device_name, "hdd%u:", (unsigned int) i);	  if (osal_get_estimated_device_size (device, &size_in_bytes) == OSAL_OK)	    result = osal_dlist_add (*hard_drives, device_name, size_in_bytes,				     is_apa_partition (device), ERROR_SUCCESS);	  else	    result = osal_dlist_add (*hard_drives, device_name, (u_int64_t) 0, 0, GetLastError ());	  	  osal_close (device);	}      else	break; /* first open error is the end of list */    }  if (result != RET_OK &&      *hard_drives != NULL)    osal_dlist_free (*hard_drives);  return (result);}/**************************************************************/intosal_query_optical_drives (osal_dlist_t **optical_drives){  u_int32_t i;  int result;  *optical_drives = NULL;  result = osal_dlist_alloc (optical_drives);  for (i=0; result == RET_OK && i<16; ++i)    {      char device_name [20];      HANDLE device;      sprintf (device_name, "\\\\.\\CdRom%u", (unsigned int) i);      if (osal_open (device_name, &device, TRUE) == OSAL_OK)	{ /* device exists */	  u_int64_t size_in_bytes;	  sprintf (device_name, "cd%u:", (unsigned int) i);	  if (osal_get_estimated_device_size (device, &size_in_bytes) == OSAL_OK)	    result = osal_dlist_add (*optical_drives, device_name,				     size_in_bytes, 0, ERROR_SUCCESS);	  else	    result = osal_dlist_add (*optical_drives, device_name,				     (u_int64_t) 0, 0, GetLastError());	  	  osal_close(device);	}      else	break; /* first open error is the end of list */    }  if (result != RET_OK &&      *optical_drives != NULL)    osal_dlist_free (*optical_drives);  return (result);}/**************************************************************/intosal_query_devices (osal_dlist_t **hard_drives,		    osal_dlist_t **optical_drives){  int result = osal_query_hard_drives (hard_drives);  if (result == RET_OK)    result = osal_query_optical_drives (optical_drives);  return (result);}/**************************************************************/static intosal_dlist_alloc (osal_dlist_t **dlist){  *dlist = (osal_dlist_t *)osal_alloc (sizeof (osal_dlist_t));  if (*dlist != NULL)    {      (*dlist)->allocated = (*dlist)->used = 0;      (*dlist)->device = NULL;      return (RET_OK);    }  else    return (RET_NO_MEM);}/**************************************************************/static intosal_dlist_add (osal_dlist_t *dlist,		const char *name,		u_int64_t capacity,		int is_ps2,		unsigned long status){  osal_dev_t *dev;  if (dlist->allocated == dlist->used)    { /* allocate memory if necessary */      osal_dev_t *tmp = (osal_dev_t *)osal_alloc ((dlist->allocated + 16) * sizeof (osal_dev_t));      if (tmp != NULL)	{	  if (dlist->device != NULL)	    {	      memcpy (tmp, dlist->device, dlist->used * sizeof (osal_dev_t));	      osal_free (dlist->device);	    }	  dlist->device = tmp;	  dlist->allocated += 16;	}      else	return (RET_NO_MEM);    }  /* add the new entry */  dev = dlist->device + dlist->used;  strncpy (dev->name, name, DEV_MAX_NAME_LEN);  dev->name [DEV_MAX_NAME_LEN - 1] = '\0';  dev->capacity = capacity;  dev->is_ps2 = is_ps2;  dev->status = status;  ++dlist->used;  return (RET_OK);}/**************************************************************/voidosal_dlist_free (osal_dlist_t *dlist){  if (dlist != NULL)    {      if (dlist->device != NULL)	osal_free (dlist->device);      osal_free (dlist);    }}/**************************************************************/int /* RET_OK, RET_BAD_FORMAT, RET_BAD_DEVICE */osal_map_device_name (const char *input,		      char output [MAX_PATH]){  if (memcmp (input, "hdd", 3) == 0)    {      char *endp;      long index = strtol (input + 3, &endp, 10);      if (endp == input + 3)	return (RET_BAD_FORMAT); /* bad format: no number after hdd */      if (endp [0] == ':' &&	  endp [1] == '\0')	{	  sprintf (output, "\\\\.\\PhysicalDrive%ld", index);	  return (RET_OK);	}      else	return (RET_BAD_FORMAT);    }  else if (memcmp (input, "cd", 2) == 0)    {      char *endp;      long index = strtol (input + 2, &endp, 10);      if (endp == input + 2)	return (RET_BAD_FORMAT); /* bad format: no number after hdd */      if (endp [0] == ':' &&	  endp [1] == '\0')	{	  sprintf (output, "\\\\.\\CdRom%ld", index);	  return (RET_OK);	}      else	return (RET_BAD_FORMAT);    }  else    return (RET_BAD_DEVICE);}