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//# PycArrayNP.h: Class to convert an Array to/from a Python numpy array
//# Copyright (C) 2006
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
#ifndef PYRAP_PYCARRAYNP_H
#define PYRAP_PYCARRAYNP_H
// include first to avoid _POSIX_C_SOURCE redefined warnings
#include <boost/python.hpp>
#include <boost/python/object.hpp>
#include <casacore/casa/Containers/ValueHolder.h>
#include <casacore/casa/Arrays/Array.h>
#include <numpy/arrayobject.h>
namespace casacore { namespace python { namespace numpy {
#define PYC_USE_PYARRAY "numpy"
#include <casacore/python/Converters/PycArrayComH.h>
#undef PYC_USE_PYARRAY
//# Define functions to deal with numpy array scalars.
// Check if it is an array scalar object.
bool PycArrayScalarCheck (PyObject* obj, int& type);
// Get the data type of the array scalar object.
// It returns TpBool, TpInt, TpFloat, or TpComplex.
// TpOther is returned if unrecognized.
DataType PycArrayScalarType (PyObject* obj_ptr);
// Make a scalar object.
ValueHolder makeScalar (PyObject* obj, int type);
// Register all array scalar converters.
void register_convert_arrayscalars();
// Templated helper function to get a value from a ValueHolder.
// Specialize for each type supported.
// <group>
template<typename T> T getScalar (const ValueHolder&);
template<> inline Bool getScalar (const ValueHolder& vh)
{ return vh.asBool(); }
template<> inline Char getScalar (const ValueHolder& vh)
{ return vh.asShort(); }
template<> inline uChar getScalar (const ValueHolder& vh)
{ return vh.asuChar(); }
template<> inline Short getScalar (const ValueHolder& vh)
{ return vh.asShort(); }
template<> inline uShort getScalar (const ValueHolder& vh)
{ return vh.asuShort(); }
template<> inline Int getScalar (const ValueHolder& vh)
{ return vh.asInt(); }
template<> inline uInt getScalar (const ValueHolder& vh)
{ return vh.asuInt(); }
template<> inline Long getScalar (const ValueHolder& vh)
{ return vh.asInt(); }
template<> inline uLong getScalar (const ValueHolder& vh)
{ return vh.asuInt(); }
template<> inline Int64 getScalar (const ValueHolder& vh)
{ return vh.asInt(); }
template<> inline uInt64 getScalar (const ValueHolder& vh)
{ return vh.asuInt(); }
template<> inline Float getScalar (const ValueHolder& vh)
{ return vh.asFloat(); }
template<> inline Double getScalar (const ValueHolder& vh)
{ return vh.asDouble(); }
template<> inline Complex getScalar (const ValueHolder& vh)
{ return vh.asComplex(); }
template<> inline DComplex getScalar (const ValueHolder& vh)
{ return vh.asDComplex(); }
// </group>
// Struct with static functions to convert a numpy array scalar to
// the templated type (e.g. Int).
template <typename T>
struct array_scalar_from_python
{
array_scalar_from_python()
{
boost::python::converter::registry::push_back(
&convertible,
&construct,
boost::python::type_id<T>());
}
// Check if it is a type we can convert.
static void* convertible(PyObject* obj_ptr)
{
int type;
if (PycArrayScalarCheck(obj_ptr, type)) {
return obj_ptr;
}
return 0;
}
// Constructs a T from a Python array scalar object.
static void construct(
PyObject* obj_ptr,
boost::python::converter::rvalue_from_python_stage1_data* data)
{
using namespace boost::python;
void* storage = ((converter::rvalue_from_python_storage<T>*)
data)->storage.bytes;
new (storage) T();
data->convertible = storage;
int type;
PycArrayScalarCheck (obj_ptr, type);
*static_cast<T*>(storage) = getScalar<T> (makeScalar(obj_ptr, type));
}
};
}}}
#endif
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