diff options
Diffstat (limited to 'test/-ext-/bignum/test_pack.rb')
| -rw-r--r-- | test/-ext-/bignum/test_pack.rb | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/test/-ext-/bignum/test_pack.rb b/test/-ext-/bignum/test_pack.rb index c2c19a32a2..202395324b 100644 --- a/test/-ext-/bignum/test_pack.rb +++ b/test/-ext-/bignum/test_pack.rb @@ -69,6 +69,55 @@ class TestBignum < Test::Unit::TestCase assert_equal([1, "\x00\x12\x00\x34\x00\x56\x00\x78"], 0x12345678.test_pack(4, 2, 8, BIG_ENDIAN)) end + def test_pack_overflow + assert_equal([-2, "\x1"], (-0x11).test_pack(1, 1, 4, BIG_ENDIAN)) + assert_equal([-2, "\x0"], (-0x10).test_pack(1, 1, 4, BIG_ENDIAN)) + assert_equal([-1, "\xF"], (-0x0F).test_pack(1, 1, 4, BIG_ENDIAN)) + assert_equal([+1, "\xF"], (+0x0F).test_pack(1, 1, 4, BIG_ENDIAN)) + assert_equal([+2, "\x0"], (+0x10).test_pack(1, 1, 4, BIG_ENDIAN)) + assert_equal([+2, "\x1"], (+0x11).test_pack(1, 1, 4, BIG_ENDIAN)) + + assert_equal([-2, "\x01"], (-0x101).test_pack(1, 1, 0, BIG_ENDIAN)) + assert_equal([-2, "\x00"], (-0x100).test_pack(1, 1, 0, BIG_ENDIAN)) + assert_equal([-1, "\xFF"], (-0x0FF).test_pack(1, 1, 0, BIG_ENDIAN)) + assert_equal([+1, "\xFF"], (+0x0FF).test_pack(1, 1, 0, BIG_ENDIAN)) + assert_equal([+2, "\x00"], (+0x100).test_pack(1, 1, 0, BIG_ENDIAN)) + assert_equal([+2, "\x01"], (+0x101).test_pack(1, 1, 0, BIG_ENDIAN)) + + assert_equal([-2, "\x00\x00\x00\x00\x00\x00\x00\x01"], (-0x10000000000000001).test_pack(2, 4, 0, BIG_ENDIAN)) + assert_equal([-2, "\x00\x00\x00\x00\x00\x00\x00\x00"], (-0x10000000000000000).test_pack(2, 4, 0, BIG_ENDIAN)) + assert_equal([-1, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF"], (-0x0FFFFFFFFFFFFFFFF).test_pack(2, 4, 0, BIG_ENDIAN)) + assert_equal([+1, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF"], (+0x0FFFFFFFFFFFFFFFF).test_pack(2, 4, 0, BIG_ENDIAN)) + assert_equal([+2, "\x00\x00\x00\x00\x00\x00\x00\x00"], (+0x10000000000000000).test_pack(2, 4, 0, BIG_ENDIAN)) + assert_equal([+2, "\x00\x00\x00\x00\x00\x00\x00\x01"], (+0x10000000000000001).test_pack(2, 4, 0, BIG_ENDIAN)) + + 1.upto(16) {|wordsize| + 1.upto(20) {|numwords| + w = numwords*wordsize + n = 256**w + assert_equal([-2, "\x00"*(w-1)+"\x01"], (-n-1).test_pack(numwords, wordsize, 0, BIG_ENDIAN)) + assert_equal([-2, "\x00"*w], (-n ).test_pack(numwords, wordsize, 0, BIG_ENDIAN)) + assert_equal([-1, "\xFF"*w], (-n+1).test_pack(numwords, wordsize, 0, BIG_ENDIAN)) + assert_equal([+1, "\xFF"*w], (+n-1).test_pack(numwords, wordsize, 0, BIG_ENDIAN)) + assert_equal([+2, "\x00"*w], (+n ).test_pack(numwords, wordsize, 0, BIG_ENDIAN)) + assert_equal([+2, "\x00"*(w-1)+"\x01"], (+n+1).test_pack(numwords, wordsize, 0, BIG_ENDIAN)) + } + } + + 1.upto(16) {|wordsize| + 1.upto(20) {|numwords| + w = numwords*wordsize + n = 256**w + assert_equal([-2, "\x01"+"\x00"*(w-1)], (-n-1).test_pack(numwords, wordsize, 0, LITTLE_ENDIAN)) + assert_equal([-2, "\x00"*w], (-n ).test_pack(numwords, wordsize, 0, LITTLE_ENDIAN)) + assert_equal([-1, "\xFF"*w], (-n+1).test_pack(numwords, wordsize, 0, LITTLE_ENDIAN)) + assert_equal([+1, "\xFF"*w], (+n-1).test_pack(numwords, wordsize, 0, LITTLE_ENDIAN)) + assert_equal([+2, "\x00"*w], (+n ).test_pack(numwords, wordsize, 0, LITTLE_ENDIAN)) + assert_equal([+2, "\x01"+"\x00"*(w-1)], (+n+1).test_pack(numwords, wordsize, 0, LITTLE_ENDIAN)) + } + } + end + def test_pack_sign assert_equal([-1, "\x01"], (-1).test_pack(1, 1, 0, BIG_ENDIAN)) assert_equal([-1, "\x80\x70\x60\x50\x40\x30\x20\x10"], (-0x8070605040302010).test_pack(8, 1, 0, BIG_ENDIAN)) @@ -116,6 +165,33 @@ class TestBignum < Test::Unit::TestCase assert_equal([+1, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF"], (+0x0FFFFFFFFFFFFFFFF).test_pack(2, 4, 0, TWOCOMP|BIG_ENDIAN)) assert_equal([+2, "\x00\x00\x00\x00\x00\x00\x00\x00"], (+0x10000000000000000).test_pack(2, 4, 0, TWOCOMP|BIG_ENDIAN)) assert_equal([+2, "\x00\x00\x00\x00\x00\x00\x00\x01"], (+0x10000000000000001).test_pack(2, 4, 0, TWOCOMP|BIG_ENDIAN)) + + 1.upto(16) {|wordsize| + 1.upto(20) {|numwords| + w = numwords*wordsize + n = 256**w + assert_equal([-2, "\xFF"*w ], (-n-1).test_pack(numwords, wordsize, 0, TWOCOMP|BIG_ENDIAN)) + assert_equal([-1, "\x00"*w], (-n ).test_pack(numwords, wordsize, 0, TWOCOMP|BIG_ENDIAN)) + assert_equal([-1, "\x00"*(w-1)+"\x01"], (-n+1).test_pack(numwords, wordsize, 0, TWOCOMP|BIG_ENDIAN)) + assert_equal([+1, "\xFF"*w], (+n-1).test_pack(numwords, wordsize, 0, TWOCOMP|BIG_ENDIAN)) + assert_equal([+2, "\x00"*w], (+n ).test_pack(numwords, wordsize, 0, TWOCOMP|BIG_ENDIAN)) + assert_equal([+2, "\x00"*(w-1)+"\x01"], (+n+1).test_pack(numwords, wordsize, 0, TWOCOMP|BIG_ENDIAN)) + } + } + + 1.upto(16) {|wordsize| + 1.upto(20) {|numwords| + w = numwords*wordsize + n = 256**w + assert_equal([-2, "\xFF"*w ], (-n-1).test_pack(numwords, wordsize, 0, TWOCOMP|LITTLE_ENDIAN)) + assert_equal([-1, "\x00"*w], (-n ).test_pack(numwords, wordsize, 0, TWOCOMP|LITTLE_ENDIAN)) + assert_equal([-1, "\x01"+"\x00"*(w-1)], (-n+1).test_pack(numwords, wordsize, 0, TWOCOMP|LITTLE_ENDIAN)) + assert_equal([+1, "\xFF"*w], (+n-1).test_pack(numwords, wordsize, 0, TWOCOMP|LITTLE_ENDIAN)) + assert_equal([+2, "\x00"*w], (+n ).test_pack(numwords, wordsize, 0, TWOCOMP|LITTLE_ENDIAN)) + assert_equal([+2, "\x01"+"\x00"*(w-1)], (+n+1).test_pack(numwords, wordsize, 0, TWOCOMP|LITTLE_ENDIAN)) + } + } + end def test_unpack_zero |