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random.c: Random.bytes

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* random.c (random_s_bytes): new method Random.bytes, which is
  equivalent to Random::DEFAULT.bytes.  [Feature #4938]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62497 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-02-20 09:26:38 +00:00
parent 74bf1767e3
commit 1cd9c3ce62
3 changed files with 28 additions and 3 deletions
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6
NEWS
View file

@ -34,6 +34,12 @@ with all sufficient information, see the ChangeLog file or Redmine
* Proc#call doesn't change $SAFE any more. [Feature #14250] * Proc#call doesn't change $SAFE any more. [Feature #14250]
* Random
* New methods:
* added Random.bytes. [Feature #4938]
=== Stdlib updates (outstanding ones only) === Stdlib updates (outstanding ones only)
* Matrix * Matrix

14
random.c
View file

@ -1134,6 +1134,19 @@ rb_random_bytes(VALUE obj, long n)
return genrand_bytes(rnd, n); return genrand_bytes(rnd, n);
} }
/*
* call-seq: Random.bytes(size) -> a_string
*
* Returns a random binary string. The argument size specified the length of
* the result string.
*/
static VALUE
random_s_bytes(VALUE obj, VALUE len)
{
rb_random_t *rnd = rand_start(&default_rand);
return genrand_bytes(rnd, NUM2LONG(rb_to_int(len)));
}
static VALUE static VALUE
range_values(VALUE vmax, VALUE *begp, VALUE *endp, int *exclp) range_values(VALUE vmax, VALUE *begp, VALUE *endp, int *exclp)
{ {
@ -1636,6 +1649,7 @@ InitVM_Random(void)
rb_define_singleton_method(rb_cRandom, "srand", rb_f_srand, -1); rb_define_singleton_method(rb_cRandom, "srand", rb_f_srand, -1);
rb_define_singleton_method(rb_cRandom, "rand", random_s_rand, -1); rb_define_singleton_method(rb_cRandom, "rand", random_s_rand, -1);
rb_define_singleton_method(rb_cRandom, "bytes", random_s_bytes, 1);
rb_define_singleton_method(rb_cRandom, "new_seed", random_seed, 0); rb_define_singleton_method(rb_cRandom, "new_seed", random_seed, 0);
rb_define_singleton_method(rb_cRandom, "urandom", random_raw_seed, 1); rb_define_singleton_method(rb_cRandom, "urandom", random_raw_seed, 1);
rb_define_private_method(CLASS_OF(rb_cRandom), "state", random_s_state, 0); rb_define_private_method(CLASS_OF(rb_cRandom), "state", random_s_state, 0);

11
test/ruby/test_rand.rb
View file

@ -347,10 +347,15 @@ END
end end
def assert_random_bytes(r) def assert_random_bytes(r)
srand(0)
assert_equal("", r.bytes(0)) assert_equal("", r.bytes(0))
assert_equal("\xAC".force_encoding("ASCII-8BIT"), r.bytes(1)) assert_equal("", Random.bytes(0))
assert_equal("/\xAA\xC4\x97u\xA6\x16\xB7\xC0\xCC".force_encoding("ASCII-8BIT"), x = "\xAC".force_encoding("ASCII-8BIT")
r.bytes(10)) assert_equal(x, r.bytes(1))
assert_equal(x, Random.bytes(1))
x = "/\xAA\xC4\x97u\xA6\x16\xB7\xC0\xCC".force_encoding("ASCII-8BIT")
assert_equal(x, r.bytes(10))
assert_equal(x, Random.bytes(10))
end end
def test_random_range def test_random_range