Modify

Opened 8 months ago

Closed 8 months ago

#3850 closed Bug (Fixed)

_WinAPI_GetDriveNumber never returns -1 as partition number

Reported by: AspirinJunkie Owned by: Jpm
Milestone: 3.3.15.5 Component: Standard UDFs
Version: 3.3.15.4 Severity: None
Keywords: Cc:

Description

The documentation for _WinAPI_GetDriveNumber says:

[2] - The partition number, or (-1) if device cannot be partitioned.

This is consistent with the description of the STORAGE_DEVICE_NUMBER structure.

However, the problem here is that the PartitionNumber part is of data type DWORD - i.e. an unsigned integer. A value of -1 is therefore simply not possible.
In C this is not a big problem, because DWORDs can also be tested for -1:

(DWORD)4294967295 == -1 // true

In AutoIt, however, 4294967295 is always returned in the case of -1 due to the conversion to Int64:

#include <WinAPIFiles.au3>

Local $aData = _WinAPI_GetDriveNumber('d:') ; a non partionable drive like a cd-drive
ConsoleWrite('Partition number: ' & $aData[2] & @CRLF)

Therefore, as a pragmatic solution, I suggest to change the structure definition as follows, deviating from the Win API documentation:

Local $tSDN = DllStructCreate('dword;dword;LONG')

Attachments (0)

Change History (1)

comment:1 Changed 8 months ago by Jpm

  • Milestone set to 3.3.15.5
  • Owner set to Jpm
  • Resolution set to Fixed
  • Status changed from new to closed

Fixed by revision [12594] in version: 3.3.15.5

Guidelines for posting comments:

  • You cannot re-open a ticket but you may still leave a comment if you have additional information to add.
  • In-depth discussions should take place on the forum.

For more information see the full version of the ticket guidelines here.

Add Comment

Modify Ticket

Action
as closed The owner will remain Jpm.
Author


E-mail address and user name can be saved in the Preferences.

 
Note: See TracTickets for help on using tickets.