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author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-05-18 00:37:10 +0000 |
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committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-05-18 00:37:10 +0000 |
commit | 63fee735002b34d37598d4830ef35073202dda58 (patch) | |
tree | b6d50c223905f199bdd237b639109d4c0dcde0f1 /test/-ext- | |
parent | ddd155842fb4fd96a028836d926bae7501cbd985 (diff) | |
download | ruby-63fee735002b34d37598d4830ef35073202dda58.tar.gz |
* configure.in: Check nextafter() availability.
* include/ruby/missing.h (nextafter): New optional declaration.
* missing/nextafter.c: New file.
* numeric.c: Float#next_float and Float#prev_float implemented.
[ruby-core:62562] [Feature #9834]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45982 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test/-ext-')
-rw-r--r-- | test/-ext-/float/test_nextafter.rb | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/test/-ext-/float/test_nextafter.rb b/test/-ext-/float/test_nextafter.rb new file mode 100644 index 0000000000..e3a3e726c7 --- /dev/null +++ b/test/-ext-/float/test_nextafter.rb @@ -0,0 +1,57 @@ +require 'test/unit' +require "-test-/float" + +class TestFloatExt < Test::Unit::TestCase + NEXTAFTER_VALUES = [ + -Float::INFINITY, + -Float::MAX, + -100.0, + -1.0-Float::EPSILON, + -1.0, + -Float::EPSILON, + -Float::MIN/2, + -Math.ldexp(0.5, Float::MIN_EXP - Float::MANT_DIG + 1), + -0.0, + 0.0, + Math.ldexp(0.5, Float::MIN_EXP - Float::MANT_DIG + 1), + Float::MIN/2, + Float::MIN, + Float::EPSILON, + 1.0, + 1.0+Float::EPSILON, + 100.0, + Float::MAX, + Float::INFINITY, + Float::NAN + ] + + test_number = 0 + NEXTAFTER_VALUES.each {|n1| + NEXTAFTER_VALUES.each {|n2| + tag = n2.infinite? ? "ruby" : "other" + test_name = "test_nextafter_#{test_number}_#{tag}_#{n1}_#{n2}" + test_number += 1 + define_method(test_name) { + v1 = Bug::Float.missing_nextafter(n1, n2) + v2 = Bug::Float.system_nextafter(n1, n2) + assert_kind_of(Float, v1) + assert_kind_of(Float, v2) + if v1.nan? + assert(v2.nan?, "Bug::Float.system_nextafter(#{n1}, #{n2}).nan?") + else + assert_equal(v1, v2, + "Bug::Float.missing_nextafter(#{'%a' % n1}, #{'%a' % n2}) = #{'%a' % v1} != " + + "#{'%a' % v2} = Bug::Float.system_nextafter(#{'%a' % n1}, #{'%a' % n2})") + if v1 == 0 + s1 = 1.0/v1 < 0 ? "negative-zero" : "positive-zero" + s2 = 1.0/v2 < 0 ? "negative-zero" : "positive-zero" + assert_equal(s1, s2, + "Bug::Float.missing_nextafter(#{'%a' % n1}, #{'%a' % n2}) = #{'%a' % v1} != " + + "#{'%a' % v2} = Bug::Float.system_nextafter(#{'%a' % n1}, #{'%a' % n2})") + end + end + } + } + } + +end |