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python_functor_inline_impl.cc
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Fri, Jun 28, 11:40

python_functor_inline_impl.cc
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#ifndef __AKANTU_PYTHON_FUNCTOR_INLINE_IMPL_CC__
#define __AKANTU_PYTHON_FUNCTOR_INLINE_IMPL_CC__
/* -------------------------------------------------------------------------- */
#include <numpy/arrayobject.h>
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
template <typename T>
inline int PythonFunctor::getPythonDataTypeCode() const{
AKANTU_EXCEPTION("undefined type");
}
/* -------------------------------------------------------------------------- */
template <>
inline int PythonFunctor::getPythonDataTypeCode<bool>() const{
int data_typecode = NPY_NOTYPE;
size_t s = sizeof(bool);
switch(s) {
case 1: data_typecode = NPY_BOOL; break;
case 2: data_typecode = NPY_UINT16; break;
case 4: data_typecode = NPY_UINT32; break;
case 8: data_typecode = NPY_UINT64; break;
}
return data_typecode;
}
/* -------------------------------------------------------------------------- */
template <>
inline int PythonFunctor::getPythonDataTypeCode<double>() const{
return NPY_DOUBLE;
}
/* -------------------------------------------------------------------------- */
template <typename T>
PyObject *PythonFunctor::convertToPython(const T & akantu_object) const{
AKANTU_DEBUG_TO_IMPLEMENT();
}
/* -------------------------------------------------------------------------- */
template <>
inline PyObject *PythonFunctor::convertToPython<double>(const double & akantu_object) const{
return PyFloat_FromDouble(akantu_object);
}
/* -------------------------------------------------------------------------- */
template <>
inline PyObject *PythonFunctor::convertToPython<UInt>(const UInt & akantu_object) const{
return PyInt_FromLong(akantu_object);
}
/* -------------------------------------------------------------------------- */
template <>
inline PyObject *PythonFunctor::convertToPython<bool>(const bool & akantu_object) const{
return PyBool_FromLong(long(akantu_object));
}
/* -------------------------------------------------------------------------- */
template <typename T>
inline PyObject *PythonFunctor::convertToPython(const std::vector<T> & array) const{
int data_typecode = getPythonDataTypeCode< T >();
npy_intp dims[1] = {int(array.size())};
PyObject* obj = PyArray_SimpleNewFromData(1, dims, data_typecode, const_cast<T*>(&array[0]));
PyArrayObject* res = (PyArrayObject*) obj;
return (PyObject*)res;
}
/* -------------------------------------------------------------------------- */
template <typename T>
PyObject *PythonFunctor::convertToPython(const Vector<T> & array) const{
int data_typecode = getPythonDataTypeCode< T >();
npy_intp dims[1] = {array.size()};
PyObject* obj = PyArray_SimpleNewFromData(1, dims, data_typecode, array.storage());
PyArrayObject* res = (PyArrayObject*) obj;
return (PyObject*)res;
}
/* -------------------------------------------------------------------------- */
template <typename T>
PyObject *PythonFunctor::convertToPython(const Matrix<T> & mat) const{
int data_typecode = getPythonDataTypeCode< T >();
npy_intp dims[2] = {mat.size(0),mat.size(1)};
PyObject* obj = PyArray_SimpleNewFromData(2, dims, data_typecode, mat.storage());
PyArrayObject* res = (PyArrayObject*) obj;
return (PyObject*)res;
}
/* -------------------------------------------------------------------------- */
inline PyObject * PythonFunctor::getPythonFunction(const std::string & functor_name) const{
if (!PyInstance_Check(this->python_obj))
AKANTU_EXCEPTION("Python object is not an instance");
// if (!PyDict_Check(this->python_obj))
// AKANTU_EXCEPTION("Python object is not a dictionary");
//PyObject * keys = PyDict_Keys(dict);
//PyObject_Print(keys, stdout, Py_PRINT_RAW);
PyObject * pFunctor = PyObject_GetAttrString(this->python_obj, functor_name.c_str());
if (!pFunctor) AKANTU_EXCEPTION("Python dictionary has no " << functor_name << " entry");
return pFunctor;
}
/* -------------------------------------------------------------------------- */
inline void PythonFunctor::packArguments(std::vector<PyObject*> & pArgs) const{}
/* -------------------------------------------------------------------------- */
template<typename T, typename... Args>
inline void PythonFunctor::packArguments(std::vector<PyObject*> & pArgs,
T & p,
Args&...params) const{
pArgs.push_back(this->convertToPython(p));
if (sizeof...(params) != 0)
this->packArguments(pArgs,params...);
}
/* -------------------------------------------------------------------------- */
template <typename return_type, typename... Params>
return_type PythonFunctor::callFunctor(const std::string & functor_name,
Params... parameters) const{
_import_array();
std::vector<PyObject*> arg_vector;
this->packArguments(arg_vector,parameters...);
PyObject * pArgs = PyTuple_New(arg_vector.size());
for (UInt i = 0; i < arg_vector.size(); ++i) {
PyTuple_SetItem(pArgs,i,arg_vector[i]);
}
PyObject * kwargs = PyDict_New();
PyObject * pFunctor = getPythonFunction(functor_name);
PyObject * res = this->callFunctor(pFunctor,pArgs,kwargs);
return this->convertToAkantu<return_type>(res);
//Py_XDECREF(pArgs);
//Py_XDECREF(kwargs);
}
/* -------------------------------------------------------------------------- */
template <typename return_type>
inline return_type PythonFunctor::convertToAkantu(PyObject * python_obj) const{
if (PyList_Check(python_obj)){
return this->convertListToAkantu<typename return_type::value_type>(python_obj);
}
AKANTU_DEBUG_TO_IMPLEMENT();
}
/* -------------------------------------------------------------------------- */
template <>
inline void PythonFunctor::convertToAkantu<void>(PyObject * python_obj) const{
if (python_obj != Py_None) AKANTU_DEBUG_WARNING("functor return a value while none was expected: ignored");
}
/* -------------------------------------------------------------------------- */
template <>
inline std::string PythonFunctor::convertToAkantu<std::string>(PyObject * python_obj) const{
if (!PyString_Check(python_obj)) AKANTU_EXCEPTION("cannot convert object to string");
return PyString_AsString(python_obj);
}
/* -------------------------------------------------------------------------- */
template <>
inline Real PythonFunctor::convertToAkantu<Real>(PyObject * python_obj) const{
if (!PyFloat_Check(python_obj)) AKANTU_EXCEPTION("cannot convert object to float");
return PyFloat_AsDouble(python_obj);
}
/* -------------------------------------------------------------------------- */
template <typename T>
inline std::vector<T> PythonFunctor::convertListToAkantu(PyObject * python_obj) const{
std::vector<T> res;
UInt size = PyList_Size(python_obj);
for (UInt i = 0; i < size; ++i) {
PyObject * item = PyList_GET_ITEM(python_obj,i);
res.push_back(this->convertToAkantu<T>(item));
}
return res;
}
__END_AKANTU__
#endif /* __AKANTU_PYTHON_FUNCTOR_INLINE_IMPL_CC__ */

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