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Remove commented out code of SecureRandom.random_number.

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[Misc #13870][ruby-core:82654] Patch by @aycabta.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59835 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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hsbt 2017-09-11 06:11:37 +00:00
parent 90a0917cbc
commit f7b3d2be57
1 changed files with 0 additions and 47 deletions
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47
lib/securerandom.rb
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@ -206,53 +206,6 @@ module Random::Formatter
s
end
=begin
# SecureRandom.random_number generates a random number.
#
# If a positive integer is given as _n_,
# +SecureRandom.random_number+ returns an integer, such that:
# +0 <= SecureRandom.random_number(n) < n+.
#
# p SecureRandom.random_number(100) #=> 15
# p SecureRandom.random_number(100) #=> 88
#
# If 0 is given or an argument is not given,
# +SecureRandom.random_number+ returns a float, such that:
# +0.0 <= SecureRandom.random_number() < 1.0+.
#
# p SecureRandom.random_number #=> 0.596506046187744
# p SecureRandom.random_number #=> 0.350621695741409
#
def random_number(n=0)
if 0 < n
if defined? OpenSSL::BN
OpenSSL::BN.rand_range(n).to_i
else
hex = n.to_s(16)
hex = '0' + hex if (hex.length & 1) == 1
bin = [hex].pack("H*")
mask = bin[0].ord
mask |= mask >> 1
mask |= mask >> 2
mask |= mask >> 4
begin
rnd = random_bytes(bin.length)
rnd[0] = (rnd[0].ord & mask).chr
end until rnd < bin
rnd.unpack("H*")[0].hex
end
else
# assumption: Float::MANT_DIG <= 64
if defined? OpenSSL::BN
i64 = OpenSSL::BN.rand(64, -1).to_i
else
i64 = random_bytes(8).unpack("Q")[0]
end
Math.ldexp(i64 >> (64-Float::MANT_DIG), -Float::MANT_DIG)
end
end
=end
# SecureRandom.uuid generates a random v4 UUID (Universally Unique IDentifier).
#
# p SecureRandom.uuid #=> "2d931510-d99f-494a-8c67-87feb05e1594"