32 bit checksum with VB .Net

[Nitin]

Hi,
I want to calculate 32 bit (4 byte) one's complement checksum of a byte array.
Does anyone know of any sample source.

Please help!

Thanks
NP

 

[Bismark Prods]

Hello,

Hi,
I want to calculate 32 bit (4 byte) one's complement checksum of a byte array.
Does anyone know of any sample source.

Sample source code no, but i know you could use 'BitConverter' too do what
you want.

Please help!

Thanks
NP

Have a nice day

Bismark

 

[Herfried K. Wagner [MVP]]

* (e-mail address removed) (Nitin) scripsit:

I want to calculate 32 bit (4 byte) one's complement checksum of a byte array.
Does anyone know of any sample source.

<URL:http://vbaccelerator.com/article.asp?id=930>

 

[Nitin]

Hi Bismark,
Thanks for your reply.
I am using the 'BitConvertor'.
The shift operator does not work with UINT32/64 data types. I am also
struggling with overflow problem.

If you find any similar example do let me know.

-NP

 

[Bismark Prods]

Hello,

Hi Bismark,
Thanks for your reply.
I am using the 'BitConvertor'.
The shift operator does not work with UINT32/64 data types. I am also

Because UINTs are not primitive ! UINT32 = INT64 and UINT64 = SINGLE ... in
VB.Net in fact. Do you use C# ?

struggling with overflow problem.

If you know you'll have overflow, you could anticipate it by making methods
shifting your values and verify the overflow to prevent it.

If you find any similar example do let me know.

Before tell me in what language do you code !