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* bignum.c (bary_pack): Support

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INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION flag.
  Fix byte order and word order handling in code specialized for
  wordsize % SIZEOF_BDIGITS == 0.

* internal.h (INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION): Defined.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41565 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2013-06-22 09:55:27 +00:00
parent d73b9320cc
commit 8f0c3ff6e4
5 changed files with 189 additions and 139 deletions
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21
test/-ext-/bignum/test_pack.rb
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@ -15,6 +15,7 @@ class TestBignum < Test::Unit::TestCase
LITTLE_ENDIAN = Integer::INTEGER_PACK_LITTLE_ENDIAN
BIG_ENDIAN = Integer::INTEGER_PACK_BIG_ENDIAN
NEGATIVE = Integer::INTEGER_PACK_NEGATIVE
GENERIC = Integer::INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION
def test_pack_zero
assert_equal([0, ""], 0.test_pack(0, 1, 0, BIG_ENDIAN))
@ -123,6 +124,25 @@ class TestBignum < Test::Unit::TestCase
assert_equal([-1, "\x80\x70\x60\x50\x40\x30\x20\x10"], (-0x8070605040302010).test_pack(8, 1, 0, BIG_ENDIAN))
end
def test_pack_orders
[MSWORD_FIRST, LSWORD_FIRST].each {|word_order|
[MSBYTE_FIRST, LSBYTE_FIRST, NATIVE_BYTE_ORDER].each {|byte_order|
1.upto(16) {|wordsize|
1.upto(20) {|numwords|
w = numwords*wordsize
n = 0;
0.upto(w) {|i|
n |= ((i+1) % 256) << (i*8)
}
assert_equal(n.test_pack(numwords, wordsize, 0, word_order|byte_order|GENERIC),
n.test_pack(numwords, wordsize, 0, word_order|byte_order),
"#{'%#x' % n}.test_pack(#{numwords}, #{wordsize}, 0, #{'%#x' % (word_order|byte_order)})")
}
}
}
}
end
def test_pack2comp_zero
assert_equal([0, ""], 0.test_pack(0, 1, 0, TWOCOMP|BIG_ENDIAN))
end
@ -273,6 +293,7 @@ class TestBignum < Test::Unit::TestCase
def test_unpack2comp_negative_zero
0.upto(100) {|n|
assert_equal(-(256**n), Integer.test_unpack("\x00"*n, n, 1, 0, TWOCOMP|BIG_ENDIAN|NEGATIVE))
assert_equal(-(256**n), Integer.test_unpack("\x00"*n, n, 1, 0, TWOCOMP|LITTLE_ENDIAN|NEGATIVE))
}
end
end