From 1c3e07f0d6d237222192f41c84716c15731b3158 Mon Sep 17 00:00:00 2001 From: mrkn Date: Sat, 3 Jul 2010 07:47:00 +0000 Subject: * 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 --- ext/bigdecimal/lib/bigdecimal/math.rb | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'ext/bigdecimal/lib/bigdecimal/math.rb') 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 -- cgit v1.2.3