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authormrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2013-12-05 16:34:59 +0000
committermrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2013-12-05 16:34:59 +0000
commit2308fb170e5a1d1f6ad580fe3620d24d75069585 (patch)
treeec7684c025673727f10a0c8a45027689c9fa2de7 /ext
parent8cffe06a04e2107c765a32a0b8b8bbe2b02f2ef0 (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')
-rw-r--r--ext/bigdecimal/bigdecimal.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 29240c7..e0cd4b0 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;