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aka_array.i
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Thu, May 9, 22:02

aka_array.i
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%{
#define SWIG_FILE_WITH_INIT
#include "aka_array.hh"
%}
%include "typemaps.i"
namespace akantu {
%ignore Array::operator=;
%ignore Array::operator[];
%ignore Array::operator();
%ignore Array::set;
%ignore Array::begin;
%ignore Array::end;
%ignore Array::begin_reinterpret;
%ignore Array::end_reinterpret;
};
%include "aka_array.hh"
namespace akantu {
%template(RArray) Array<akantu::Real, true>;
%template(UArray) Array<akantu::UInt, true>;
%template(BArray) Array<bool, true>;
}
%include "numpy.i"
%init %{
import_array();
%}
%inline %{
namespace akantu{
template <typename T>
class ArrayForPython : public Array<T>{
public:
ArrayForPython(T * wrapped_memory,
UInt size = 0,
UInt nb_component = 1,
const ID & id = "")
: Array<T>(0,nb_component,id){
this->values = wrapped_memory;
this->size = size;
};
~ArrayForPython(){
this->values = NULL;
};
void resize(UInt new_size){
AKANTU_DEBUG_ASSERT(this->size == new_size,"cannot resize a temporary vector");
}
};
}
template <typename T> int getPythonDataTypeCode(){ AKANTU_EXCEPTION("undefined type");}
template <> int getPythonDataTypeCode<bool>(){
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 <> int getPythonDataTypeCode<double>(){return NPY_DOUBLE;}
template <> int getPythonDataTypeCode<long double>(){return NPY_LONGDOUBLE;}
template <> int getPythonDataTypeCode<float>(){return NPY_FLOAT;}
template <> int getPythonDataTypeCode<unsigned long>(){
int data_typecode = NPY_NOTYPE;
size_t s = sizeof(unsigned long);
switch(s) {
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 <> int getPythonDataTypeCode<akantu::UInt>(){
int data_typecode = NPY_NOTYPE;
size_t s = sizeof(akantu::UInt);
switch(s) {
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 <> int getPythonDataTypeCode<int>(){
int data_typecode = NPY_NOTYPE;
size_t s = sizeof(int);
switch(s) {
case 2: data_typecode = NPY_INT16; break;
case 4: data_typecode = NPY_INT32; break;
case 8: data_typecode = NPY_INT64; break;
}
return data_typecode;
}
int getSizeOfPythonType(int type_num){
switch (type_num){
case NPY_INT16 : return 2;break;
case NPY_UINT16: return 2;break;
case NPY_INT32 : return 4;break;
case NPY_UINT32: return 4;break;
case NPY_INT64 : return 8;break;
case NPY_UINT64: return 8;break;
case NPY_FLOAT: return sizeof(float);break;
case NPY_DOUBLE: return sizeof(double);break;
case NPY_LONGDOUBLE: return sizeof(long double);break;
}
return 0;
}
std::string getPythonTypeName(int type_num){
switch (type_num){
case NPY_INT16 : return "NPY_INT16" ;break;
case NPY_UINT16: return "NPY_UINT16";break;
case NPY_INT32 : return "NPY_INT32" ;break;
case NPY_UINT32: return "NPY_UINT32";break;
case NPY_INT64 : return "NPY_INT64" ;break;
case NPY_UINT64: return "NPY_UINT64";break;
case NPY_FLOAT: return "NPY_FLOAT" ;break;
case NPY_DOUBLE: return "NPY_DOUBLE";break;
case NPY_LONGDOUBLE: return "NPY_LONGDOUBLE";break;
}
return 0;
}
template <typename T> void checkDataType(int type_num){
AKANTU_DEBUG_ASSERT(type_num == getPythonDataTypeCode<T>(),
"incompatible types between numpy and input function: " <<
type_num << " != " << getPythonDataTypeCode<T>() << std::endl <<
getSizeOfPythonType(type_num) << " != " << sizeof(T) <<
std::endl <<
"The numpy array is of type " << getPythonTypeName(type_num));
}
%}
%define %akantu_array_typemaps(DATA_TYPE)
%typemap(out, fragment="NumPy_Fragments") (akantu::Array< DATA_TYPE > &)
{
int data_typecode = getPythonDataTypeCode< DATA_TYPE >();
npy_intp dims[2] = {npy_intp($1->getSize()), npy_intp($1->getNbComponent())};
PyObject* obj = PyArray_SimpleNewFromData(2, dims, data_typecode, $1->storage());
PyArrayObject* array = (PyArrayObject*) obj;
if (!array) SWIG_fail;
$result = SWIG_Python_AppendOutput($result, obj);
}
%typemap(in) akantu::Array< DATA_TYPE > &
{
if (!PyArray_Check($input)) {
AKANTU_EXCEPTION("incompatible input which is not a numpy");
}
else {
PyArray_Descr * numpy_type = (PyArray_Descr*)PyArray_DESCR((PyArrayObject*)$input);
int type_num = numpy_type->type_num;
checkDataType< DATA_TYPE >(type_num);
UInt _n = PyArray_NDIM((PyArrayObject*)$input);
if (_n != 2) AKANTU_EXCEPTION("incompatible numpy dimension " << _n);
npy_intp * ndims = PyArray_DIMS((PyArrayObject*)$input);
akantu::UInt sz = ndims[0];
akantu::UInt nb_components = ndims[1];
PyArrayIterObject *iter = (PyArrayIterObject *)PyArray_IterNew($input);
if (iter == NULL) AKANTU_EXCEPTION("Python internal error");
$1 = new akantu::ArrayForPython< DATA_TYPE >((DATA_TYPE*)(iter->dataptr),sz,nb_components,"tmp_array_for_python");
}
}
%enddef
%akantu_array_typemaps(double )
%akantu_array_typemaps(float )
%akantu_array_typemaps(unsigned int)
%akantu_array_typemaps(unsigned long)
%akantu_array_typemaps(int )
%akantu_array_typemaps(bool )

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