[Boost-commit] svn:boost r83598 - trunk/libs/math/test

Subject: [Boost-commit] svn:boost r83598 - trunk/libs/math/test
From: pbristow_at_[hidden]
Date: 2013-03-27 07:52:18

Author: pbristow
Date: 2013-03-27 07:52:17 EDT (Wed, 27 Mar 2013)
New Revision: 83598
URL: http://svn.boost.org/trac/boost/changeset/83598

Log:
Revised zztest_max_digits10 test to check on RaspberryPI failures in constants_eg1.cpp.
Text files modified: 
   trunk/libs/math/test/zztest_max_digits10.cpp |     9 +++++++--                               
   1 files changed, 7 insertions(+), 2 deletions(-)

Modified: trunk/libs/math/test/zztest_max_digits10.cpp
==============================================================================
--- trunk/libs/math/test/zztest_max_digits10.cpp	(original)
+++ trunk/libs/math/test/zztest_max_digits10.cpp	2013-03-27 07:52:17 EDT (Wed, 27 Mar 2013)
@@ -46,13 +46,18 @@
    int digits10 = std::numeric_limits<double>::digits10;
    std::cout << "std::numeric_limits<double>::digits10 = " << digits10 << std::endl;
 
-//#ifndef BOOST_NO_NUMERIC_LIMITS_LOWEST
-
 #ifndef BOOST_NO_CXX11_NUMERIC_LIMITS
+   // OK to use C++11 max_digits10;
    int max_digits10 = std::numeric_limits<double>::max_digits10;
    std::cout << "std::numeric_limits<double>::max_digits10 = " << max_digits10 << std::endl;
+#else
+   // No support for max_digits10; so use Kahan formula instead.
+   int max_digits10 = 2 + std::numeric_limits<double>::digits * 3010/10000;
+   std::cout << "2 + std::numeric_limits<double>::digits * 3010/10000; = " <<
+   2 + std::numeric_limits<double>::digits * 3010/10000;
 #endif
 
+
 } // int main()
 
 /*