Graph hash value feature request

[nagygp]

Dear @lhsoicher , the command line program dreadnaut can be used to generate a 3x32=96-bit hash value to a graph. The command z does the job once a canonical labelling is computed (with the comman cx). It would be great to have access to the hash value using the GRAPE package. Thanks!

Dreadnaut (Debian 2.7r3+ds-1) version 2.7 (64 bits).
> n=12 $=1 g
 1 : 2;3;4;5;6;7;8;9;10;11;12;1.
> c
> x
(2 12)(3 11)(4 10)(5 9)(6 8)
level 2:  7 orbits; 5 fixed; index 2
(1 2 3 4 5 6 7 8 9 10 11 12)
level 1:  1 orbit; 1 fixed; index 12
1 orbit; grpsize=24; 2 gens; 6 nodes; maxlev=3
canupdates=1; cpu time = 0.00 seconds
> z
[N2552efde 394889fc 3c67aaf3]

Remark. The command line program bliss has no option to generate the hash value. The C++ program BLISS itself has a method g->get_hash() which produces a 32-bit hash. Unfortunately, one needs to write C/C++ programs to have access to it.