From a424741c8e73bbca5d893594abbdfda489794739 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 9 Feb 2008 08:51:26 +0000
Subject: * ext/bigdecimal/bigdecimal.c (BigDecimal_to_f): use strtod() for
 more   precision.  [ruby-talk:290296]

* ext/bigdecimal/bigdecimal.c (BASE_FIG): made constant.

* ext/bigdecimal/extconf.rb: ditto.  [ruby-dev:33658]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15415 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/bigdecimal/extconf.rb | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'ext/bigdecimal/extconf.rb')

diff --git a/ext/bigdecimal/extconf.rb b/ext/bigdecimal/extconf.rb
index a68a656044..864aaad862 100644
--- a/ext/bigdecimal/extconf.rb
+++ b/ext/bigdecimal/extconf.rb
@@ -1,2 +1,12 @@
 require 'mkmf'
+
+base_fig = 0
+src = ("(BASE > 0) && "
+       "(BASE * (BASE+1)) > BASE && "
+       "(BASE * (BASE+1)) / BASE == (BASE+1)")
+while try_static_assert(src, nil, "-DBASE=10#{'0'*base_fig}UL")
+  base_fig += 1
+end
+$defs << "-DBASE=1#{'0'*base_fig}UL" << "-DBASE_FIG=#{base_fig}"
+
 create_makefile('bigdecimal')
-- 
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