C++ (Cpp) mrb_random_mt_g_srand Examples

Example #1

File: random.c Project: takahashim/mruby

static void 
mrb_random_g_rand_seed(mrb_state *mrb) 
{
  mrb_value seed;
  
  seed = mrb_gv_get(mrb, mrb_intern2(mrb, GLOBAL_RAND_SEED_KEY, GLOBAL_RAND_SEED_KEY_CSTR_LEN));
  if (mrb_nil_p(seed)) {
    mrb_random_mt_g_srand(mrb, mrb_nil_value());
  }
}

Example #2

File: random.c Project: Fleurer/mruby

static mrb_value mrb_random_g_srand(mrb_state *mrb, mrb_value self)
{
  mrb_value seed;
  mrb_value old_seed;

  seed = get_opt(mrb);
  seed = mrb_random_mt_g_srand(mrb, seed);
  old_seed = mrb_gv_get(mrb, mrb_intern2(mrb, GLOBAL_RAND_SEED_KEY, GLOBAL_RAND_SEED_KEY_CSTR_LEN));
  mrb_gv_set(mrb, mrb_intern2(mrb, GLOBAL_RAND_SEED_KEY, GLOBAL_RAND_SEED_KEY_CSTR_LEN), seed);
  return old_seed;
}

Example #3

File: random.c Project: Fleurer/mruby

static mrb_value mrb_random_g_rand(mrb_state *mrb, mrb_value self)
{
  mrb_value max;
  mrb_value seed;

  max = get_opt(mrb);
  seed = mrb_gv_get(mrb, mrb_intern2(mrb, GLOBAL_RAND_SEED_KEY, GLOBAL_RAND_SEED_KEY_CSTR_LEN));
  if (mrb_nil_p(seed)) {
    mrb_random_mt_g_srand(mrb, mrb_nil_value());
  }
  return mrb_random_mt_g_rand(mrb, max);
}

Example #4

File: random.c Project: Fleurer/mruby

static mrb_value
mrb_ary_shuffle_bang(mrb_state *mrb, mrb_value ary)
{
  mrb_int i;
  mrb_value seed;

  seed = mrb_gv_get(mrb, mrb_intern2(mrb, GLOBAL_RAND_SEED_KEY, GLOBAL_RAND_SEED_KEY_CSTR_LEN));
  if (mrb_nil_p(seed)) {
    mrb_random_mt_g_srand(mrb, mrb_nil_value());
  }
  
  if (RARRAY_LEN(ary) > 1) {
    mrb_ary_modify(mrb, mrb_ary_ptr(ary));
    for (i = RARRAY_LEN(ary) - 1; i > 0; i--)  {
      mrb_int j = mrb_fixnum(mrb_random_mt_g_rand(mrb, mrb_fixnum_value(RARRAY_LEN(ary))));
      mrb_value t = RARRAY_PTR(ary)[i];
      RARRAY_PTR(ary)[i] = RARRAY_PTR(ary)[j];
      RARRAY_PTR(ary)[j] = t;
    }    
  }
  
  return ary;
}