diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | ext/bigdecimal/bigdecimal.c | 8 |
2 files changed, 10 insertions, 3 deletions
@@ -1,3 +1,8 @@ +Mon Jun 1 07:20:02 2009 Yukihiro Matsumoto <matz@ruby-lang.org> + + * ext/bigdecimal/bigdecimal.c (BigDecimal_to_f): returns Inf if + exp is bigger than DBL_MANT_DIG. + Sun May 31 23:28:00 2009 Nobuyoshi Nakada <nobu@ruby-lang.org> * lib/mkmf.rb (create_makefile): checks for duplication of source diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c index 2f4b9ada34..bbdab3f2c8 100644 --- a/ext/bigdecimal/bigdecimal.c +++ b/ext/bigdecimal/bigdecimal.c @@ -604,16 +604,18 @@ BigDecimal_to_f(VALUE self) volatile VALUE str; GUARD_OBJ(p,GetVpValue(self,1)); - if(VpVtoD(&d, &e, p)!=1) return rb_float_new(d); + if (VpVtoD(&d, &e, p)!=1) return rb_float_new(d); + if (e > DBL_MAX_10_EXP) goto erange; str = rb_str_new(0, VpNumOfChars(p,"E")); buf = RSTRING_PTR(str); VpToString(p, buf, 0, 0); errno = 0; d = strtod(buf, 0); if(errno == ERANGE) { + erange: VpException(VP_EXCEPTION_OVERFLOW,"BigDecimal to Float conversion",0); - if(d>0.0) return rb_float_new(DBL_MAX); - else return rb_float_new(-DBL_MAX); + if(d>0.0) d = VpGetDoublePosInf(); + else d = VpGetDoubleNegInf(); } return rb_float_new(d); } |