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annotate __py_struct_from_dict__.cc @ 345:baff3b90dcb1

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__py_struct_from_dict__: new private compiled conversion function * __py_struct_from_dict__.cc: New private internal compiled function to convert a Python dict to a scalar struct. * Makefile.am (OCT_FILES): Add __py_struct_from_dict__.oct to the list.
author Mike Miller <mtmiller@octave.org>
date Tue, 16 Aug 2016 15:34:05 -0700
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children 6cd581661176
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1 /*
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2
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3 Copyright (C) 2016 Mike Miller
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4
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5 This file is part of Pytave.
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6
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7 Pytave is free software: you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation, either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Pytave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Pytave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if defined (HAVE_CONFIG_H)
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24 # include <config.h>
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25 #endif
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26
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27 #include <Python.h>
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28 #include <octave/oct.h>
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29
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30 #define PYTAVE_DO_DECLARE_SYMBOL
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31 #include "arrayobjectdefs.h"
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32 #include "exceptions.h"
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33 #include "oct-py-types.h"
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34 #include "octave_to_python.h"
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35
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36 DEFUN_DLD (__py_struct_from_dict__, args, nargout,
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37 "-*- texinfo -*-\n\
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38 @deftypefn {} {} __py_struct_from_dict__ (@var{dict})\n\
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39 Extract a scalar struct from the Python dict @var{dict}.\n\
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40 \n\
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41 This is a private internal function not intended for direct use.\n\
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42 @end deftypefn")
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43 {
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44 octave_value_list retval;
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45 std::string id;
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46
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47 int nargin = args.length ();
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48
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49 if (nargin != 1)
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50 {
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51 print_usage ();
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52 return retval;
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53 }
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54
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55 if (! (args(0).is_object () && args(0).class_name () == "pyobject"))
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56 error ("pyobject.struct: argument must be a Python object");
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57
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58 Py_Initialize ();
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59
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60 try
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61 {
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62 // FIXME: PyObject *obj = look up stored pyobject reference (args(0));
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63 boost::python::object arg;
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64 pytave::octvalue_to_pyobj (arg, args(0));
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65 PyObject *obj = arg.ptr ();
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66
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67 retval(0) = pytave::extract_py_scalar_map (obj);
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68 }
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69 catch (pytave::object_convert_exception const &)
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70 {
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71 error ("pyobject.struct: error in return value type conversion");
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72 }
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73 catch (boost::python::error_already_set const &)
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74 {
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75 std::string message = pytave::fetch_exception_message ();
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76 error ("pyobject.struct: %s", message.c_str ());
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77 }
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78
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79 return retval;
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80 }
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81
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82 /*
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83 ## No test needed for internal helper function.
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84 %!assert (1)
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85 */