diff options
| author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-06-12 15:18:00 +0000 |
|---|---|---|
| committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-06-12 15:18:00 +0000 |
| commit | aaa1461d7b1508c12e9aaa3f2c2681ddc82fa0f4 (patch) | |
| tree | b9c7a602b2756d9a17c55d8701b889b481440a8a /test/-ext-/bignum/test_pack.rb | |
| parent | 17f1cdaa00ff51470b934c99f6e54a24bf377b71 (diff) | |
* bignum.c (rb_integer_unpack_2comp): New function.
(rb_integer_unpack_internal): Extracted from rb_integer_unpack and
nlp_bits_ret argument added.
(integer_unpack_num_bdigits_small): nlp_bits_ret argument added to
return number of leading padding bits.
(integer_unpack_num_bdigits_generic): Ditto.
* internal.h (rb_integer_unpack_2comp): Declared.
* pack.c (pack_unpack): Use rb_integer_unpack_2comp and
rb_integer_unpack.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41264 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test/-ext-/bignum/test_pack.rb')
| -rw-r--r-- | test/-ext-/bignum/test_pack.rb | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/-ext-/bignum/test_pack.rb b/test/-ext-/bignum/test_pack.rb index ea5dedd585..d34a59db31 100644 --- a/test/-ext-/bignum/test_pack.rb +++ b/test/-ext-/bignum/test_pack.rb @@ -162,5 +162,36 @@ class TestBignum < Test::Unit::TestCase assert_equal(-0x8070605040302010, Integer.test_unpack("\x80\x70\x60\x50\x40\x30\x20\x10", 8, 1, 0, BIG_ENDIAN|NEGATIVE)) end + def test_unpack2comp_single_byte + assert_equal(-128, Integer.test_unpack_2comp("\x80", 1, 1, 0, BIG_ENDIAN)) + assert_equal( -2, Integer.test_unpack_2comp("\xFE", 1, 1, 0, BIG_ENDIAN)) + assert_equal( -1, Integer.test_unpack_2comp("\xFF", 1, 1, 0, BIG_ENDIAN)) + assert_equal( 0, Integer.test_unpack_2comp("\x00", 1, 1, 0, BIG_ENDIAN)) + assert_equal( 1, Integer.test_unpack_2comp("\x01", 1, 1, 0, BIG_ENDIAN)) + assert_equal( 2, Integer.test_unpack_2comp("\x02", 1, 1, 0, BIG_ENDIAN)) + assert_equal( 127, Integer.test_unpack_2comp("\x7F", 1, 1, 0, BIG_ENDIAN)) + end + + def test_unpack2comp_sequence_of_ff + assert_equal(-1, Integer.test_unpack_2comp("\xFF"*2, 2, 1, 0, BIG_ENDIAN)) + assert_equal(-1, Integer.test_unpack_2comp("\xFF"*3, 3, 1, 0, BIG_ENDIAN)) + assert_equal(-1, Integer.test_unpack_2comp("\xFF"*4, 4, 1, 0, BIG_ENDIAN)) + assert_equal(-1, Integer.test_unpack_2comp("\xFF"*5, 5, 1, 0, BIG_ENDIAN)) + assert_equal(-1, Integer.test_unpack_2comp("\xFF"*6, 6, 1, 0, BIG_ENDIAN)) + assert_equal(-1, Integer.test_unpack_2comp("\xFF"*7, 7, 1, 0, BIG_ENDIAN)) + assert_equal(-1, Integer.test_unpack_2comp("\xFF"*8, 8, 1, 0, BIG_ENDIAN)) + assert_equal(-1, Integer.test_unpack_2comp("\xFF"*9, 9, 1, 0, BIG_ENDIAN)) + end + + def test_unpack2comp_negative_single_byte + assert_equal(-256, Integer.test_unpack_2comp("\x00", 1, 1, 0, BIG_ENDIAN|NEGATIVE)) + assert_equal(-255, Integer.test_unpack_2comp("\x01", 1, 1, 0, BIG_ENDIAN|NEGATIVE)) + assert_equal(-254, Integer.test_unpack_2comp("\x02", 1, 1, 0, BIG_ENDIAN|NEGATIVE)) + assert_equal(-129, Integer.test_unpack_2comp("\x7F", 1, 1, 0, BIG_ENDIAN|NEGATIVE)) + assert_equal(-128, Integer.test_unpack_2comp("\x80", 1, 1, 0, BIG_ENDIAN|NEGATIVE)) + assert_equal( -2, Integer.test_unpack_2comp("\xFE", 1, 1, 0, BIG_ENDIAN|NEGATIVE)) + assert_equal( -1, Integer.test_unpack_2comp("\xFF", 1, 1, 0, BIG_ENDIAN|NEGATIVE)) + end + end end |