diff options
| author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-10-04 00:55:15 +0000 |
|---|---|---|
| committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-10-04 00:55:15 +0000 |
| commit | cc80f139cdc2c7224afc496178d5c56a7f9cdd1c (patch) | |
| tree | 1d1b42e4796061ff14c20b8631970a47f6b9cb95 | |
| parent | 1ae50df95d72f02dc4e8f2edf9502609fd95a8fd (diff) | |
bigdecimal.c: more precision
* ext/bigdecimal/bigdecimal.c (BigDecimal_div2): need more room
for precision to round. [ruby-core:77475] [Bug #12805]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56336 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | ext/bigdecimal/bigdecimal.c | 2 | ||||
| -rw-r--r-- | test/bigdecimal/test_bigdecimal.rb | 6 |
3 files changed, 12 insertions, 1 deletions
@@ -1,3 +1,8 @@ +Tue Oct 4 09:55:12 2016 Nobuyoshi Nakada <nobu@ruby-lang.org> + + * ext/bigdecimal/bigdecimal.c (BigDecimal_div2): need more room + for precision to round. [ruby-core:77475] [Bug #12805] + Tue Oct 4 06:05:46 2016 NARUSE, Yui <naruse@ruby-lang.org> * regcomp.c (onig_print_compiled_byte_code): make the shown address diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c index 8f41c725f8..623bd11cee 100644 --- a/ext/bigdecimal/bigdecimal.c +++ b/ext/bigdecimal/bigdecimal.c @@ -1533,7 +1533,7 @@ BigDecimal_div2(VALUE self, VALUE b, VALUE n) size_t mx = ix + VpBaseFig()*2; size_t pl = VpSetPrecLimit(0); - GUARD_OBJ(cv, VpCreateRbObject(mx, "0")); + GUARD_OBJ(cv, VpCreateRbObject(mx + VpBaseFig(), "0")); GUARD_OBJ(av, GetVpValue(self, 1)); GUARD_OBJ(bv, GetVpValue(b, 1)); mx = av->Prec + bv->Prec + 2; diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb index 4296b50c59..63a3e2747d 100644 --- a/test/bigdecimal/test_bigdecimal.rb +++ b/test/bigdecimal/test_bigdecimal.rb @@ -807,6 +807,12 @@ class TestBigDecimal < Test::Unit::TestCase BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false) assert_equal(0, BigDecimal("0").div(BigDecimal("Infinity"))) end + + x = BigDecimal.new("1") + y = BigDecimal.new("0.22") + (2..20).each do |i| + assert_equal ("0."+"45"*(i/2)+"5"*(i%2)+"E1"), x.div(y, i).to_s, "#{i}" + end end def test_abs_bigdecimal |