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Recreating Perl Unpack function in VB

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djjohnnyg

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Recreating Perl Unpack function in VB Monday, October 06, 2008 2:53 AM (permalink)

Hi,

I am trying to recreate a perl script in VB but have a problem creating a checksum value that a target system needs.

In Perl this checksum is calculated using the unpack function:

while (<PACKAGE>) {
$checksum += unpack("%32C*", $_);
    }
    $checksum %= 32767;
    close(PACKAGE);
}

where PACKAGE is the .tar file input stream

I need to replicate this in VB but can't find a means of replicating that unpack function.

All help appreciated!

(I know there are much better checksum calculations available but can't change target system so can't change calculation)

TNO

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RE: Recreating Perl Unpack function in VB Friday, October 17, 2008 2:16 AM (permalink)

I've seen that you've posted this question across a significant number of forums without a good reply, (that I've seen yet). A couple years ago I think we tackled a similar problem as this:

http://www.visualbasicscript.com/m_40662/mpage_1/key_big%2cendian/tm.htm

It's not .NET, but maybe the logic we came up with would help

To iterate is human, to recurse divine. -- L. Peter Deutsch