Date: Thursday, January 26, 2006 @ 22:21:28
Author: marc
Path: /cvsroot/carob/carob/src
Modified: ParameterStatement.cpp (1.8 -> 1.9)
Templatized stream settings specific to floats and doubles. Inf & NaN still not
handled/"translated". CAROB-31 & CAROB-55.
------------------------+
ParameterStatement.cpp | 68 ++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 64 insertions(+), 4 deletions(-)
Index: carob/src/ParameterStatement.cpp
diff -u carob/src/ParameterStatement.cpp:1.8
carob/src/ParameterStatement.cpp:1.9
--- carob/src/ParameterStatement.cpp:1.8 Tue Jan 24 19:37:27 2006
+++ carob/src/ParameterStatement.cpp Thu Jan 26 22:21:28 2006
@@ -139,6 +139,64 @@
std::locale locC = std::locale::classic();
}
+namespace CarobNS {
+
+using std::basic_ostream;
+
+
+// Template<datatype> stream manipulators
+// No pointer to function template (type safety?), so let's do a functor
+template <class T, class Ch = wchar_t>
+class streamSettingsFor
+{
+public:
+ void doManip(basic_ostream<Ch>& s) const { };
+};
+
+// stream operator<< for the functor just above
+template <class T, class Ch>
+basic_ostream<Ch>&
+operator<< (basic_ostream<Ch>& s, streamSettingsFor<T, Ch> m)
+{
+ m.doManip(s);
+ return s;
+}
+
+// partial specialization code shared by float & double
+template<class Ch> void
+streamSettingsForFloatingPoint(basic_ostream<Ch>& s)
+{
+ s.imbue(locC);
+ s.setf(std::ios_base::scientific, std::ios_base::floatfield);
+}
+
+// template specialization for float
+template<class Ch>
+class streamSettingsFor<float, Ch>
+{
+public:
+ void doManip(basic_ostream<Ch>& s) const
+ {
+ streamSettingsForFloatingPoint(s);
+ s.precision(9);
+ };
+};
+
+// template specialization for float
+template<class Ch>
+class streamSettingsFor<double, Ch>
+{
+public:
+ void doManip(basic_ostream<Ch>& s) const
+ {
+ streamSettingsForFloatingPoint(s);
+ s.precision(17);
+ };
+};
+
+} // namespace CarobNS
+
+
template <class T> void ParameterStatement::set(const int paramIndex, const
std::wstring &typeTag,
const T& value)
throw (DriverException, UnexpectedException)
@@ -146,12 +204,14 @@
if (paramIndex < 1 || paramIndex > (int)inStrings.size())
throw DriverException(L"Parameter index out of range.");
+ // As an optimization, we could make this stream a member.
+ // That would just require a member lock for thread-safety
std::wostringstream buffer;
- buffer.imbue(locC);
- buffer.setf(std::ios_base::scientific, std::ios_base::floatfield);
- buffer.precision(18); // std::numeric_limits<double>::digits10 + some
- buffer << START_PARAM_TAG << typeTag << value << END_PARAM_TAG;
+
+ // TODO: catch inf & NaN
+ buffer << START_PARAM_TAG << typeTag << streamSettingsFor<T>() << value <<
END_PARAM_TAG;
+
inStrings[paramIndex-1] = buffer.str();
}
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