nobu	2018-02-20 18:26:38 +0900 (Tue, 20 Feb 2018)

  New Revision: 62497

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=62497

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

  Modified files:
    trunk/NEWS
    trunk/random.c
    trunk/test/ruby/test_rand.rb
Index: test/ruby/test_rand.rb
===================================================================
--- test/ruby/test_rand.rb	(revision 62496)
+++ test/ruby/test_rand.rb	(revision 62497)
@@ -347,10 +347,15 @@ END https://github.com/ruby/ruby/blob/trunk/test/ruby/test_rand.rb#L347
   end
 
   def assert_random_bytes(r)
+    srand(0)
     assert_equal("", r.bytes(0))
-    assert_equal("\xAC".force_encoding("ASCII-8BIT"), r.bytes(1))
-    assert_equal("/\xAA\xC4\x97u\xA6\x16\xB7\xC0\xCC".force_encoding("ASCII-8BIT"),
-                 r.bytes(10))
+    assert_equal("", Random.bytes(0))
+    x = "\xAC".force_encoding("ASCII-8BIT")
+    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
 
   def test_random_range
Index: random.c
===================================================================
--- random.c	(revision 62496)
+++ random.c	(revision 62497)
@@ -1134,6 +1134,19 @@ rb_random_bytes(VALUE obj, long n) https://github.com/ruby/ruby/blob/trunk/random.c#L1134
     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
 range_values(VALUE vmax, VALUE *begp, VALUE *endp, int *exclp)
 {
@@ -1636,6 +1649,7 @@ InitVM_Random(void) https://github.com/ruby/ruby/blob/trunk/random.c#L1649
 
     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, "bytes", random_s_bytes, 1);
     rb_define_singleton_method(rb_cRandom, "new_seed", random_seed, 0);
     rb_define_singleton_method(rb_cRandom, "urandom", random_raw_seed, 1);
     rb_define_private_method(CLASS_OF(rb_cRandom), "state", random_s_state, 0);
Index: NEWS
===================================================================
--- NEWS	(revision 62496)
+++ NEWS	(revision 62497)
@@ -34,6 +34,12 @@ with all sufficient information, see the https://github.com/ruby/ruby/blob/trunk/NEWS#L34
 
   * Proc#call doesn't change $SAFE any more. [Feature #14250]
 
+* Random
+
+  * New methods:
+
+    * added Random.bytes. [Feature #4938]
+
 === Stdlib updates (outstanding ones only)
 
 * Matrix

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