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mruby-random/random.c: randomize Random::DEFAULT.

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Using time(2) and randomized pointer address. May not work well with old
OSes without process randomiser.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2022-06-17 07:12:12 +09:00
parent 0a63cdd594
commit 267c26d20b
1 changed files with 6 additions and 2 deletions
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mrbgems/mruby-random/src/random.c
+6 -2
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@@ -421,8 +421,12 @@ void mrb_mruby_random_gem_init(mrb_state *mrb)
mrb_define_method(mrb, array, "shuffle!", mrb_ary_shuffle_bang, MRB_ARGS_OPT(1));
mrb_define_method(mrb, array, "sample", mrb_ary_sample, MRB_ARGS_OPT(2));
mrb_const_set(mrb, mrb_obj_value(random), MRB_SYM(DEFAULT),
mrb_obj_new(mrb, random, 0, NULL));
mrb_value d = mrb_obj_new(mrb, random, 0, NULL);
rand_state *t = random_ptr(d);
mrb_const_set(mrb, mrb_obj_value(random), MRB_SYM(DEFAULT), d);
uint32_t seed = (uint32_t)time(NULL);
rand_seed(t, seed ^ (uint32_t)t);
}
void mrb_mruby_random_gem_final(mrb_state *mrb)