Mercurial > pytave
view oct-py-types.cc @ 344:9d95f087e5aa
Add a function to extract a scalar map value from a Python dict
* oct-py-types.cc, oct-py-types.h (pytave::extract_py_scalar_map): New function.
author | Mike Miller <mtmiller@octave.org> |
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date | Tue, 16 Aug 2016 15:29:01 -0700 |
parents | 6bd8f5e3542a |
children | eac35d84ef0d |
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/* Copyright (C) 2016 Mike Miller This file is part of Pytave. Pytave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Pytave 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 General Public License for more details. You should have received a copy of the GNU General Public License along with Pytave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if defined (HAVE_CONFIG_H) # include <config.h> #endif #include <octave/Cell.h> #include <octave/oct-map.h> #include <octave/quit.h> #include "exceptions.h" #include "oct-py-types.h" // FIXME: only here to bootstrap nested conversions needed in this file #include "octave_to_python.h" #include "python_to_octave.h" namespace pytave { PyObject * make_py_bool (bool value) { if (value) Py_RETURN_TRUE; else Py_RETURN_FALSE; } PyObject * make_py_complex (std::complex<double> value) { Py_complex& py_complex_value = reinterpret_cast<Py_complex&> (value); return PyComplex_FromCComplex (py_complex_value); } PyObject * make_py_float (double value) { return PyFloat_FromDouble (value); } bool extract_py_bool (PyObject *obj) { if (! obj) throw object_convert_exception ("failed to extract boolean: null object"); if (! PyBool_Check (obj)) throw object_convert_exception ("failed to extract boolean: wrong type"); return (obj == Py_True); } std::complex<double> extract_py_complex (PyObject *obj) { if (! obj) throw object_convert_exception ("failed to extract complex: null object"); if (! PyComplex_Check (obj)) throw object_convert_exception ("failed to extract complex: wrong type"); Py_complex value = PyComplex_AsCComplex (obj); return reinterpret_cast<std::complex<double>&> (value); } double extract_py_float (PyObject *obj) { if (! obj) throw object_convert_exception ("failed to extract float: null object"); if (! PyFloat_Check (obj)) throw object_convert_exception ("failed to extract float: wrong type"); return PyFloat_AsDouble (obj); } inline PyObject * make_py_int (int32_t value) { #if PY_VERSION_HEX >= 0x03000000 return PyLong_FromLong (value); #else return PyInt_FromLong (value); #endif } inline PyObject * make_py_int (uint32_t value) { return PyLong_FromUnsignedLong (value); } inline PyObject * make_py_int (int64_t value) { #if (defined (HAVE_LONG_LONG) && (SIZEOF_LONG_LONG > SIZEOF_LONG)) return PyLong_FromLongLong (value); #else return PyLong_FromLong (value); #endif } inline PyObject * make_py_int (uint64_t value) { #if (defined (HAVE_LONG_LONG) && (SIZEOF_LONG_LONG > SIZEOF_LONG)) return PyLong_FromUnsignedLongLong (value); #else return PyLong_FromUnsignedLong (value); #endif } PyObject * make_py_numeric_value (const octave_value& value) { if (value.is_scalar_type ()) { if (value.is_bool_type ()) return make_py_bool (value.bool_value ()); else if (value.is_int8_type ()) return make_py_int (value.int8_scalar_value ().value ()); else if (value.is_int16_type ()) return make_py_int (value.int16_scalar_value ().value ()); else if (value.is_int32_type ()) return make_py_int (value.int32_scalar_value ().value ()); else if (value.is_int64_type ()) return make_py_int (value.int64_scalar_value ().value ()); else if (value.is_uint8_type ()) return make_py_int (value.uint8_scalar_value ().value ()); else if (value.is_uint16_type ()) return make_py_int (value.uint16_scalar_value ().value ()); else if (value.is_uint32_type ()) return make_py_int (value.uint32_scalar_value ().value ()); else if (value.is_uint64_type ()) return make_py_int (value.uint64_scalar_value ().value ()); else if (value.is_complex_type ()) return make_py_complex (value.complex_value ()); else if (value.is_float_type ()) return make_py_float (value.double_value ()); } throw value_convert_exception ("unhandled scalar type"); return 0; } inline PyObject * wrap_octvalue_to_pyobj (const octave_value& value) { boost::python::object obj; octvalue_to_pyobj (obj, value); PyObject *ptr = obj.ptr (); Py_INCREF (ptr); return ptr; } inline octave_value wrap_pyobj_to_octvalue (PyObject *obj) { boost::python::object objref { boost::python::handle<> (boost::python::borrowed (obj)) }; octave_value value; pyobj_to_octvalue (value, objref); return value; } octave_scalar_map extract_py_scalar_map (PyObject *obj) { if (! obj) throw object_convert_exception ("failed to extract map: null object"); if (! PyDict_Check (obj)) throw object_convert_exception ("failed to extract map: wrong type"); octave_scalar_map map; Py_ssize_t pos = 0; PyObject *py_key = 0; PyObject *py_value = 0; while (PyDict_Next (obj, &pos, &py_key, &py_value)) { if (! PyBytes_Check (py_key) && ! PyUnicode_Check (py_key)) throw object_convert_exception ("failed to extract map: bad key type"); std::string key = extract_py_str (py_key); octave_value value = wrap_pyobj_to_octvalue (py_value); map.setfield (key, value); } return map; } PyObject * make_py_dict (const octave_scalar_map& map) { PyObject *dict = PyDict_New (); if (! dict) octave_throw_bad_alloc (); for (auto p = map.begin (); p != map.end (); ++p) { PyObject *key = make_py_str (map.key (p)); if (! key) octave_throw_bad_alloc (); PyObject *item = wrap_octvalue_to_pyobj (map.contents (p)); if (PyDict_SetItem (dict, key, item) < 0) throw boost::python::error_already_set (); } return dict; } int64_t extract_py_int64 (PyObject *obj) { if (! obj) throw object_convert_exception ("failed to extract integer: null object"); if (PyLong_Check (obj)) return PyLong_AsLong (obj); #if PY_VERSION_HEX < 0x03000000 else if (PyInt_Check (obj)) return PyInt_AsLong (obj); #endif else throw object_convert_exception ("failed to extract integer: wrong type"); return 0; } PyObject * make_py_tuple (const Cell& cell) { if (! (cell.is_empty () || cell.is_vector ())) throw value_convert_exception ( "unable to convert multidimensional cell array into Python tuple"); octave_idx_type size = cell.numel (); PyObject *tuple = PyTuple_New (size); if (! tuple) octave_throw_bad_alloc (); for (octave_idx_type i = 0; i < size; ++i) { PyObject *item = wrap_octvalue_to_pyobj (cell.xelem (i)); PyTuple_SET_ITEM (tuple, i, item); } return tuple; } std::string extract_py_str (PyObject *obj) { std::string retval; if (! obj) throw object_convert_exception ("failed to extract string: null object"); if (PyBytes_Check (obj)) { retval.assign (PyBytes_AsString (obj), PyBytes_Size (obj)); } else if (PyUnicode_Check (obj)) { bool ok = false; PyObject *enc = PyUnicode_AsUTF8String (obj); if (enc) { if (PyBytes_Check (enc)) { ok = true; retval.assign (PyBytes_AsString (enc), PyBytes_Size (enc)); } Py_DECREF (enc); } if (! ok) throw object_convert_exception ("failed to extract string: UTF-8 error"); } else throw object_convert_exception ("failed to extract string: wrong type"); return retval; } PyObject * make_py_str (const std::string& str) { #if PY_VERSION_HEX >= 0x03000000 return PyUnicode_FromStringAndSize (str.data (), str.size ()); #else return PyString_FromStringAndSize (str.data (), str.size ()); #endif } }