[Quantlib-dev] [ quantlib-Bugs-3466468 ] SWIG/CSharp/VS2010

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Bugs item #3466468, was opened at 2011-12-28 04:03
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: https://www.google.com/accounts ()
Assigned to: Nobody/Anonymous (nobody)
Summary: SWIG/CSharp/VS2010

Initial Comment:
Hello I have been using QuantLib in Visual Studio 2010, and have come across the following issues:

1) There is an %include in the SWIG wrapper which #defines SWIGSTDCALL to nothing if the SWIG target is CSharp. This causes P/Invoke to throw an exception under the .NET 4.0 Framework. (see http://msdn.microsoft.com/en-us/library/ee941656(v=VS.100).aspx, "Platform Invoke") because the wrapper functions are not __stdcall.

2) In order to use the numerical integration classes from C# I had to add the following code to the SWIG wrapper, perhaps you could consider integrating it into the next release:

=== types.i ===
...
#elif defined(SWIGCSHARP)
// The following macro defines a typemap between boost::function<RTYPE(PTYPEA)> and a corresponding .NET delegate type
%define %cs_func1(RTYPE, friendlyRTYPE, PTYPEA, friendlyPTYPEA) 
	#define BFUNC boost::function<RTYPE(PTYPEA)>
	#define DELEGATE friendlyPTYPEA##To##friendlyRTYPE##Delegate

	%pragma(csharp) modulecode=%{
		public delegate RTYPE friendlyPTYPEA##To##friendlyRTYPE##Delegate(PTYPEA a);
	%}

        %typemap(ctype) BFUNC, BFUNC& "void*" 
        %typemap(in) BFUNC { $1 = (RTYPE (__stdcall *)(PTYPEA)) $input; }
        %typemap(in) BFUNC& { $1 = (RTYPE (__stdcall *)(PTYPEA)) $input; }
        %typemap(imtype, out="IntPtr", noblock=1) BFUNC, BFUNC& { NQuantLibc.DELEGATE }
        %typemap(cstype, out="IntPtr", noblock=1) BFUNC, BFUNC& { NQuantLibc.DELEGATE }
        %typemap(csin, noblock=1) BFUNC, BFUNC& { $csinput }

	#undef DELEGATE
	#undef BFUNC
%enddef
// Typemap boost::function<double(double)> to NQuantLibc.DoubleToDoubleDelegate
%cs_func1(double, Double, double, Double)
#endif
...


=== integrals.i ===
...
%define INTEGRATION_METHODS
...
#elif defined(SWIGCSHARP)
Real Call(boost::function<double(double)> f, Real a, Real b)
{
	return (*self)(f, a, b);
}
#endif

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