C++ (Cpp) mrb_random_mt_g_rand示例

示例#1

文件： random.c 项目： takahashim/mruby

static mrb_value
mrb_ary_shuffle_bang(mrb_state *mrb, mrb_value ary)
{
  mrb_int i;
  mrb_value random = mrb_nil_value();
  
  if (RARRAY_LEN(ary) > 1) {
    mrb_get_args(mrb, "|o", &random);

    if( mrb_nil_p(random) ) {
      mrb_random_g_rand_seed(mrb);
    } else {
      mrb_data_check_type(mrb, random, &mt_state_type);
      mrb_random_rand_seed(mrb, random);
    }
  
    mrb_ary_modify(mrb, mrb_ary_ptr(ary));
    
    for (i = RARRAY_LEN(ary) - 1; i > 0; i--)  {
      mrb_int j;
      
      if( mrb_nil_p(random) ) {
        j = mrb_fixnum(mrb_random_mt_g_rand(mrb, mrb_fixnum_value(RARRAY_LEN(ary))));
      } else {
        j = mrb_fixnum(mrb_random_mt_rand(mrb, DATA_PTR(random), 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;
}

示例#2

文件： random.c 项目： takahashim/mruby

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

  max = get_opt(mrb);
  mrb_random_g_rand_seed(mrb);
  return mrb_random_mt_g_rand(mrb, max);
}

示例#3

文件： random.c 项目： 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);
}

示例#4

文件： random.c 项目： 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;
}