diff options
| author | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-12-05 16:34:59 +0000 |
|---|---|---|
| committer | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-12-05 16:34:59 +0000 |
| commit | 2308fb170e5a1d1f6ad580fe3620d24d75069585 (patch) | |
| tree | ec7684c025673727f10a0c8a45027689c9fa2de7 /ext/bigdecimal | |
| parent | 8cffe06a04e2107c765a32a0b8b8bbe2b02f2ef0 (diff) | |
* ext/bigdecimal/bigdecimal.c (GetVpValueWithPrec):
treat 0.0 and -0.0 of floating-point numbers specially for an optimization
and to correctly propagate its signbit to the result.
[Bug #9214] [ruby-core:58858]
* test/bigdecimal/test_bigdecimal.rb: add tests case for the above change.
* test/bigdecimal/test_bigdecimal_util.rb: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44021 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/bigdecimal')
| -rw-r--r-- | ext/bigdecimal/bigdecimal.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c index 29240c7da4..e0cd4b006b 100644 --- a/ext/bigdecimal/bigdecimal.c +++ b/ext/bigdecimal/bigdecimal.c @@ -199,14 +199,23 @@ GetVpValueWithPrec(VALUE v, long prec, int must) VALUE num, bg; char szD[128]; VALUE orig = Qundef; + double d; again: switch(TYPE(v)) { case T_FLOAT: if (prec < 0) goto unable_to_coerce_without_prec; if (prec > DBL_DIG+1) goto SomeOneMayDoIt; - v = rb_funcall(v, id_to_r, 0); - goto again; + d = RFLOAT_VALUE(v); + if (d != 0.0) { + v = rb_funcall(v, id_to_r, 0); + goto again; + } + if (1/d < 0.0) { + return VpCreateRbObject(prec, "-0"); + } + return VpCreateRbObject(prec, "0"); + case T_RATIONAL: if (prec < 0) goto unable_to_coerce_without_prec; |