Fri Dec 19 11:49:21 2003 George Lebl <jirka@5z.com>
* glib/grand.c
glib/grand.h (g_rand_new) (g_rand_new_with_seed)
(g_rand_new_with_seed_array) (g_rand_set_seed_array): Add
the init_by_array functionality from the reference implementation
of the mersenne twister (mt19937ar.c) and change the naming
to fit with the rest of the grand API. New functions are
g_rand_new_with_seed_array, g_rand_set_seed_array. This is only
reliable/tested for the 2.2 version of the seeding as that's what
the reference implementation uses. Also modify g_rand_new to
get 4 longs from /dev/urandom since that will always be available
anyway and we get more entropy and if /dev/urandom is unavailable
use also 4 longs for seeding using secs, usecs, getpid and getppid.
For version 2.0 use only a simple seed again but be more careful
about seeding with secs/usecs in this case.
* glib/grand.c
glib/grand.h (g_rand_copy): Add g_rand_copy function to copy the
current state of the random number generator.
* glib/grand.c (g_rand_new): Add testing for EINTR when reading
from /dev/urandom
* tests/rand-test.c: add testing of the array seeding stuff against
the reference implementation, plus add statistical sanity check
to see that the values outputted are truly kind of random. And
check that g_rand_copy truly copies the state by checking a few
terms.