Endiannes & Splitting Values

[Alex Parrill via Digitalmars-d-learn]

On Wednesday, 6 July 2016 at 21:44:37 UTC, BitGuy wrote:
> I'm trying to implement a feistel cipher that'll give the same 
> results regardless of the endianness of the machine it runs on. 
> To make the cipher I need to split a 64bit value into two 32bit 
> values, mess with them, and then put them back together. I can 
> think of a few ways to split a 64bit value with versions or the 
> endianness functions in bitmanip but it all seems pretty messy 
> for just wanting to split a value... I'm thinking maybe I can 
> just cast and bitshift so I can forget about the endianness but 
> I'm not really sure about the casting down rules and if that'd 
> work?

Bitshifts and binary operators work the same regardless of 
endianness. Just shift by 32/mask  with 0xFFFFFFFF and cast.

It's only if you are accessing a value as a byte array that you 
have to worry about endianness.