diff options
| author | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-07-03 07:47:00 +0000 |
|---|---|---|
| committer | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-07-03 07:47:00 +0000 |
| commit | 1c3e07f0d6d237222192f41c84716c15731b3158 (patch) | |
| tree | b207b1f80d418c4b57eec8a213d83e4069d95406 /ext/bigdecimal/lib | |
| parent | 59cad45f9963b359b16c1b9a9324b78e5e0873d5 (diff) | |
* ext/bigdecimal/bigdecimal.c (Init_bigdecimal): add two new constants BigDecimal::INFINITY and BigDecimal::NAN.
* ext/bigdecimal/lib/bigdecimal/math.rb (BigMath.exp): modify the behaviors for infinity arguments as same as Math.exp.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28533 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/bigdecimal/lib')
| -rw-r--r-- | ext/bigdecimal/lib/bigdecimal/math.rb | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/ext/bigdecimal/lib/bigdecimal/math.rb b/ext/bigdecimal/lib/bigdecimal/math.rb index 41fc69f66c..c17841fdb9 100644 --- a/ext/bigdecimal/lib/bigdecimal/math.rb +++ b/ext/bigdecimal/lib/bigdecimal/math.rb @@ -155,7 +155,15 @@ module BigMath # -> "0.271828182845904523536028752390026306410273E1" def exp(x, prec) raise ArgumentError, "Zero or negative precision for exp" if prec <= 0 - return BigDecimal("NaN") if x.infinite? || x.nan? + if x.infinite? + if x < 0 + return BigDecimal("0", prec) + else + return BigDecimal("+Infinity", prec) + end + elsif x.nan? + return BigDecimal("NaN", prec) + end n = prec + BigDecimal.double_fig one = BigDecimal("1") x = -x if neg = x < 0 |