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annotate oct-py-object.h @ 403:3644df6564bc

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maint: use C++11 nullptr rather than 0 or NULL * __py_struct_from_dict__.cc, oct-py-eval.cc, oct-py-eval.h, oct-py-object.h, oct-py-types.cc, oct-py-util.cc, pycall.cc, pyeval.cc, pyexec.cc: Use C++11 nullptr rather than 0 or NULL.
author Mike Miller <mtmiller@octave.org>
date Fri, 28 Apr 2017 14:19:49 -0700
parents 3a64a336d214
children
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1 /*
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2
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3 Copyright (C) 2017 Abhinav Tripathi
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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 (pytave_oct_py_object_h)
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24 #define pytave_oct_py_object_h 1
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25
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26 #include <Python.h>
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27
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28 namespace pytave
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29 {
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30
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31 class python_object
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32 {
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33 public:
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34 python_object (PyObject *obj = nullptr)
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35 {
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36 pyobj = obj;
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37 isowned = pyobj != nullptr;
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38 }
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39
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40 python_object (const python_object& oth)
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41 {
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42 pyobj = oth.pyobj;
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43 isowned = oth.isowned;
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44 if (isowned)
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45 Py_INCREF (pyobj);
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46 }
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47
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48 ~python_object ()
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49 {
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50 if (isowned)
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51 Py_DECREF (pyobj);
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52 }
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53
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54 python_object&
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55 operator = (const python_object& oth)
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56 {
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57 if (isowned)
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58 Py_DECREF (pyobj);
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59 pyobj = oth.pyobj;
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60 isowned = oth.isowned;
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61 if (isowned)
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62 Py_INCREF (pyobj);
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63 return *this;
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64 }
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65
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66 python_object&
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67 operator = (PyObject *obj)
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68 {
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69 if (isowned)
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70 Py_DECREF (pyobj);
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71 pyobj = obj;
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72 isowned = pyobj != nullptr;
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73 if (isowned)
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74 Py_INCREF (pyobj);
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75 return *this;
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76 }
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77
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78 operator bool () const
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79 {
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80 return isowned;
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81 }
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82
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83 operator PyObject * ()
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84 {
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85 return pyobj;
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86 }
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87
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88 bool
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89 is_none () const
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90 {
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91 return pyobj && pyobj == Py_None;
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92 }
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93
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94 PyObject *
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95 release ()
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96 {
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97 isowned = false;
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98 PyObject *ret = pyobj;
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99 pyobj = nullptr;
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100 return ret;
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101 }
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102
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103 private:
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104 PyObject *pyobj;
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105 bool isowned;
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106 };
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107
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108 }
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109
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110 #endif