My choice to pick Go over D ( and Rust ), mostly non-technical

[Ralph Doncaster]

On Tuesday, 6 February 2018 at 20:55:31 UTC, Adam D. Ruppe wrote:
> On Tuesday, 6 February 2018 at 20:25:22 UTC, Ralph Doncaster 
> wrote:
>> The opencl package in dub is a crude wrapper around the 
>> original C API.  I couldn't find any sha lib, so I've started 
>> porting a reference sha3 implementation from C.
>
> Don't port libraries like that, just call them directly. 
> Porting crypto stuff is just asking for bugs and there's fairly 
> little benefit over just calling them.

Is there an automatic way to make D wrappers for all the C 
function calls?

There's also the problem that the test code for the C/C++ 
libraries would have to be wrapped up into the library or ported 
to D.

Although I'm new to D, I do know crypto quite well, and 
especially sha3/keccak.  One reason I considered porting was to 
see if dmd outputs better code than gcc.  On x86_64 with the xmm 
registers there is enough room for 1600 bits of the keccak state 
to be stored in registers, but gcc 5.4 will still use RAM for the 
state.  It stays in L1, but storing all the state in registers 
should be much faster as it would avoid a lot of mov instructions 
loading parts of the state into registers.