Class: Random

Inherits:
Object show all
Defined in:
mruby/mrbgems/mruby-random/src/random.c

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Object 



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# File 'mruby/mrbgems/mruby-random/src/random.c', line 174

static mrb_value
random_m_init(mrb_state *mrb, mrb_value self)
{
  mrb_int seed;
  rand_state *t;

  t = random_ptr(self);
  if (mrb_get_args(mrb, "|i", &seed) == 0) {
    rand_init(t);
  }
  else {
    rand_seed(t, (uint32_t)seed);
  }

  return self;
}

Instance Method Details

#bytes ⇒ Object 



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# File 'mruby/mrbgems/mruby-random/src/random.c', line 220

static mrb_value
random_m_bytes(mrb_state *mrb, mrb_value self)
{
  rand_state *t = random_ptr(self);

  mrb_int i;
  mrb_get_args(mrb, "i", &i);

  mrb_value bytes = mrb_str_new(mrb, NULL, i);
  uint8_t *p = (uint8_t*)RSTRING_PTR(bytes);
  for (; i > 0; i--, p++) {
    *p = (uint8_t)rand_uint32(t);
  }

  return bytes;
}

#rand ⇒ Object 



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# File 'mruby/mrbgems/mruby-random/src/random.c', line 191

static mrb_value
random_m_rand(mrb_state *mrb, mrb_value self)
{
  mrb_int max;
  rand_state *t = random_ptr(self);

  max = get_opt(mrb);
  return random_rand(mrb, t, max);
}

#srand ⇒ Object 



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# File 'mruby/mrbgems/mruby-random/src/random.c', line 201

static mrb_value
random_m_srand(mrb_state *mrb, mrb_value self)
{
  uint32_t seed;
  uint32_t old_seed;
  mrb_int i;
  rand_state *t = random_ptr(self);

  if (mrb_get_args(mrb, "|i", &i) == 0) {
    seed = (uint32_t)time(NULL) ^ rand_uint32(t) ^ (uint32_t)(uintptr_t)t;
  }
  else {
    seed = (uint32_t)i;
  }
  old_seed = rand_seed(t, seed);

  return mrb_int_value(mrb, (mrb_int)old_seed);
}