diff options
Diffstat (limited to 'ext')
| -rw-r--r-- | ext/bigdecimal/bigdecimal.c | 8 | ||||
| -rw-r--r-- | ext/bigdecimal/lib/bigdecimal/math.rb | 10 |
2 files changed, 17 insertions, 1 deletions
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c index 817fc13cfd..340ea8bb80 100644 --- a/ext/bigdecimal/bigdecimal.c +++ b/ext/bigdecimal/bigdecimal.c @@ -1902,6 +1902,8 @@ BigDecimal_sign(VALUE self) void Init_bigdecimal(void) { + VALUE arg; + /* Initialize VP routines */ VpInit((U_LONG)0); @@ -2023,6 +2025,12 @@ Init_bigdecimal(void) /* -3: Indicates that a value is negative and infinite. See BigDecimal.sign. */ rb_define_const(rb_cBigDecimal, "SIGN_NEGATIVE_INFINITE",INT2FIX(VP_SIGN_NEGATIVE_INFINITE)); + arg = rb_str_new2("+Infinity"); + rb_define_const(rb_cBigDecimal, "INFINITY", BigDecimal_global_new(1, &arg, rb_cBigDecimal)); + arg = rb_str_new2("NaN"); + rb_define_const(rb_cBigDecimal, "NAN", BigDecimal_global_new(1, &arg, rb_cBigDecimal)); + + /* instance methods */ rb_define_method(rb_cBigDecimal, "precs", BigDecimal_prec, 0); 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 |