merges r20368 from trunk into ruby_1_9_1.

* ext/bigdecimal/bigdecimal.c (BigDecimal_div2): should return
  Integer for #div operation.

* ext/bigdecimal/bigdecimal.c (BigDecimal_div2): should raise
  ZeroDivisionError if divisor is zero.  [ruby-dev:37207]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@21053 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 12 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 462a929e3..cc9f8aada 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Thu Nov 27 10:40:52 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* ext/bigdecimal/bigdecimal.c (BigDecimal_div2): should return
+	  Integer for #div operation.
+
+	* ext/bigdecimal/bigdecimal.c (BigDecimal_div2): should raise
+	  ZeroDivisionError if divisor is zero.  [ruby-dev:37207]
+
 Mon Nov  3 00:36:44 2008  Masaki Suketa  <masaki.suketa@nifty.ne.jp>
 
 	* test/win32ole/test_win32ole_event.rb: rename test class.
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index b21041a32..93fab7b36 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -1169,7 +1169,10 @@ BigDecimal_div2(int argc, VALUE *argv, VALUE self)
        Real *mod;
        obj = BigDecimal_DoDivmod(self,b,&div,&mod);
        if(obj!=(VALUE)0) return obj;
-       return ToValue(div);
+       if(VpIsNaN(div) && rb_equal(b, INT2FIX(0))) {
+	   rb_raise(rb_eZeroDivError, "divided by 0");
+       }
+       return BigDecimal_to_i(ToValue(div));
     } else {    /* div in BigDecimal sense */
        U_LONG ix = (U_LONG)GetPositiveInt(n);
        if(ix==0) return BigDecimal_div(self,b);