How to calc easier the "long" filesize from nFileSizeLow andnFileSizeHigh

[DurumDara]

Hi !

I get the file datas with FindFilesW.
I want to calc the filesize from nFileSizeLow and nFileSizeHigh with
easiest as possible, without again calling os.getsize().
How to I do it ? I need good result !

Thanx for help:
dd

 

[John Machin]

Hi !

I get the file datas with FindFilesW.
I want to calc the filesize from nFileSizeLow and nFileSizeHigh with
easiest as possible, without again calling os.getsize().
How to I do it ? I need good result !

Thanx for help:
dd

Hello, *again*, dd

Well I've never heard of this caper before but what I'd do would be a
Google search for e.g. nFileSizeHigh and read the first few articles ...
in particular the first one which warns about bulldust on the MS website

HTH,
John

P.S. You have heard of Google, haven't you?

 

[John Machin]

Hi !

I get the file datas with FindFilesW.
I want to calc the filesize from nFileSizeLow and nFileSizeHigh with
easiest as possible, without again calling os.getsize().
How to I do it ? I need good result !

Thanx for help:
dd

Hello, *again*, dd

Well I've never heard of this caper before but what I'd do would be a
Google search for e.g. nFileSizeHigh and read the first few articles ...
in particular the first one which warns about bulldust on the MS website

HTH,
John

P.S. You have heard of Google, haven't you?

 

[Roger Upole]

Shift nFileSizeHigh by 32 and add FileSizeLow.

Roger

 

[John Machin]

Shift nFileSizeHigh by 32 and add FileSizeLow.

Uh-ohh. Here we have yet another manifestation of the Y2K bug's little
sibling, the F2G bug.

The above doesn't work for 2GB <= filesize < 4GB, 6GB <= filesize < 8GB,
etc. See below.

Roger

Those two items are defined as int (that's *signed* int) -- so if the
punter has a 3 GB file, nFileSizeHigh will be zero and nFileSizeLow will
be -1073741824. *Minus* 1 GB? Hey, d00d, who stole my file-system?

Try this:

fsz = (hi << 32) + lo
if lo < 0:
fsz += 0x100000000

This problem is described in the first article found by googling for
"nFileSizeHigh", as I suggested to the OP. Here is some evidence:

C:\junk>dir gb3.txt
[snip]
31/05/2006 07:59 AM 3,221,225,472 gb3.txt
[snip]
C:\junk>python
Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
|>>> import win32file
|>>> d = win32file.FindFilesW(u'gb3.txt')
|>>> d
[(32, <PyTime:30/05/2006 9:43:06 PM>, <PyTime:30/05/2006 9:59:06 PM>,
<PyTime:30/05/2006 9:59:06 PM>, 0, -1073741824, 0, 0, u'gb3.txt', u'')]
|>>> hi, lo = d[0][4:6]
|>>> hi, lo
(0, -1073741824)
|>>> fsz = (hi << 32) + lo
|>>> fsz
-1073741824
|>>> # if lo < 0:
|... fsz += (1 << 32)
|>>>
|>>> fsz
3221225472L
|>>>

Cheers,
John