pyWrapUtils.hh
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pyWrapUtils.hh
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	#ifndef NPSTAT_PYWRAPUTILS_HH_
	#define NPSTAT_PYWRAPUTILS_HH_

	#include <stdexcept>

	#include "Python.h"

	namespace npstat {
	inline double getDoubleFromPyObj(PyObject* d)
	{
	if (PyErr_Occurred()) throw std::runtime_error(
	"In npstat::getDoubleFromPyObj: unhandled error at the time of call");
	const double tmp = PyFloat_AsDouble(d);
	if (PyErr_Occurred()) throw std::runtime_error(
	"In npstat::getDoubleFromPyObj: argument can not be converted to a double");
	return tmp;
	}

	class DecrefHandle
	{
	public:
	inline explicit DecrefHandle(PyObject* ptr) : ptr_(ptr) {}
	inline ~DecrefHandle() {Py_XDECREF(ptr_);}
	inline PyObject* release() {PyObject* p = ptr_; ptr_=0; return p;}

	private:
	PyObject* ptr_;
	};

	inline void validatePyCallable(PyObject* pFunc)
	{
	if (!pFunc) throw std::invalid_argument(
	"In npstat::validatePyCallable: null object encountered");
	if (!PyCallable_Check(pFunc)) throw std::invalid_argument(
	"In npstat::validatePyCallable: argument is not callable");
	}
	}

	#endif // NPSTAT_PYWRAPUTILS_HH_