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annotate oct-py-util.cc @ 372:b20b8cf8ad07

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Make an internal function to return the name of the builtins module * oct-py-util.cc (pytave::py_builtins_module_name): New function. (pytave::py_builtins_module): Use it.
author Mike Miller <mtmiller@octave.org>
date Fri, 26 Aug 2016 13:59:18 -0700
parents 1470ed26917a
children 0e4097c66788
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 <oct.h>
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28 #include <octave/parse.h>
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29
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30 #include "oct-py-types.h"
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31 #include "oct-py-util.h"
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32
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33 // FIXME: only here for boost::python::error_already_set
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34 #include <boost/python.hpp>
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35
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36 namespace pytave
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37 {
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38
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39 inline std::string
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40 py_builtins_module_name ()
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41 {
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42 #if PY_VERSION_HEX >= 0x03000000
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43 return "builtins";
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44 #else
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45 return "__builtin__";
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46 #endif
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47 }
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48
357
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49 PyObject *
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50 py_builtins_module ()
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51 {
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52 return py_import_module (py_builtins_module_name ());
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53 }
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54
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55 PyObject *
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56 py_find_function (PyObject *module, const std::string& name)
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57 {
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58 if (module && PyModule_Check (module))
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59 {
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60 PyObject *obj = PyObject_GetAttrString (module, name.c_str ());
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61 if (obj && ! PyCallable_Check (obj))
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62 {
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63 Py_CLEAR (obj);
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64 }
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65
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66 return obj;
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67 }
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68
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69 return 0;
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70 }
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71
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72 PyObject *
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73 py_find_function (const std::string& module, const std::string& name)
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74 {
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75 PyObject *mod = py_import_module (module);
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76 PyObject *func = py_find_function (mod, name);
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77 Py_XDECREF (mod);
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78 return func;
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79 }
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80
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81 PyObject *
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82 py_find_function (const std::string& name)
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83 {
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84 std::string::size_type idx = name.rfind (".");
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85 if (idx == std::string::npos)
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86 {
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87 PyObject *func = py_find_function ("__main__", name);
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88 if (! func)
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89 func = py_find_function (py_builtins_module (), name);
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90 return func;
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91 }
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92 else
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93 {
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94 std::string module = name.substr (0, idx);
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95 std::string function = name.substr (idx + 1);
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96 return py_find_function (module, function);
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97 }
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98 }
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99
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100 PyObject *
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101 py_find_type (const std::string& name)
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102 {
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103 PyObject *obj = py_find_function (name);
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104 if (obj && PyType_Check (obj))
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105 return obj;
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106
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107 Py_XDECREF (obj);
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108 return 0;
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109 }
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110
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111 PyObject *
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112 py_import_module (const std::string& name)
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113 {
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114 return PyImport_ImportModule (name.c_str ());
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115 }
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116
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117 bool
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118 py_isinstance (PyObject *obj, PyObject *type)
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119 {
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120 if (obj && type)
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121 return static_cast<bool> (PyObject_IsInstance (obj, type));
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122
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123 return false;
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124 }
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125
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126 std::string
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127 py_object_class_name (PyObject *obj)
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128 {
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129 PyObject *class_ = obj ? PyObject_GetAttrString (obj, "__class__") : 0;
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130 PyObject *name_ = class_ ? PyObject_GetAttrString (class_, "__name__") : 0;
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131 return name_ ? extract_py_str (name_): "";
331
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132 }
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133
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134 // FIXME: could make this into a class/singleton wrapper a la Octave core
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135 PyObject *objstore = 0;
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136
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137 inline PyObject *
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138 py_objstore ()
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139 {
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140 if (! objstore)
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141 {
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142 PyObject *main = py_import_module ("__main__");
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143 PyObject *ns = main ? PyObject_GetAttrString (main, "__dict__") : 0;
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144 PyObject *dict = ns ? PyDict_GetItemString (ns, "_in_octave") : 0;
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145
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146 if (dict)
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147 Py_INCREF (dict);
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148
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149 if (! dict)
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150 {
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151 dict = PyDict_New ();
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152 if (dict && ns)
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153 PyDict_SetItemString (ns, "_in_octave", dict);
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154 }
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155
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156 if (! dict)
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157 throw boost::python::error_already_set ();
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158
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159 objstore = dict;
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160 }
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161 return objstore;
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162 }
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163
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164 void
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165 py_objstore_del (uint64_t key)
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166 {
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167 PyObject *store = py_objstore ();
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168 PyObject *key_obj = make_py_int (key);
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169 PyObject *key_fmt = PyNumber_ToBase (key_obj, 16);
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170 PyDict_DelItem (store, key_fmt);
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171 Py_DECREF (key_fmt);
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172 Py_DECREF (key_obj);
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173 }
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174
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175 PyObject *
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176 py_objstore_get (uint64_t key)
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177 {
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178 PyObject *store = py_objstore ();
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179 PyObject *key_obj = make_py_int (key);
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180 PyObject *key_fmt = PyNumber_ToBase (key_obj, 16);
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181 PyObject *obj = PyDict_GetItem (store, key_fmt);
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182 Py_DECREF (key_fmt);
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183 Py_DECREF (key_obj);
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184 if (obj)
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185 Py_INCREF (obj);
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186 return obj;
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187 }
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188
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189 uint64_t
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190 py_objstore_put (PyObject *obj)
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191 {
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192 PyObject *store = py_objstore ();
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193 uint64_t key = reinterpret_cast<uint64_t> (obj);
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194 PyObject *key_obj = make_py_int (key);
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195 PyObject *key_fmt = PyNumber_ToBase (key_obj, 16);
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196 PyDict_SetItem (store, key_fmt, obj);
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197 Py_DECREF (key_fmt);
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198 Py_DECREF (key_obj);
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199 return key;
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200 }
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201
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202 octave_value
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203 pyobject_wrap_object (PyObject *obj)
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204 {
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205 uint64_t key = py_objstore_put (obj);
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206 octave_value_list out = feval ("pyobject", ovl (0, octave_uint64 (key)), 1);
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207 return out(0);
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208 }
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209
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210 PyObject *
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211 pyobject_unwrap_object (const octave_value& value)
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212 {
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213 if (value.is_object () && value.class_name () == "pyobject")
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214 {
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215 octave_value_list out = feval ("id", ovl (value), 1);
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216 uint64_t key = out(0).uint64_scalar_value ();
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217 return py_objstore_get (key);
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218 }
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219
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220 return 0;
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221 }
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222
333
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223 bool
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224 is_py_kwargs_argument (PyObject *obj)
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225 {
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226 if (obj && py_object_class_name (obj) == "_OctaveKwargs"
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227 && PyObject_HasAttrString (obj, "is_kwargs_argument"))
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228 {
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229 PyObject *flag = PyObject_GetAttrString (obj, "is_kwargs_argument");
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230 if (flag && PyBool_Check (flag) && PyObject_IsTrue (flag))
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231 return true;
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232 }
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233 return false;
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234 }
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235
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236 PyObject *
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237 update_py_dict (PyObject *dict_orig, PyObject *dict_new)
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238 {
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239 PyObject *dict = dict_orig ? dict_orig : PyDict_New ();
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240 PyDict_Update (dict, dict_new);
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241 return dict;
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242 }
96b78e78a235 pycall: add support for keyword arguments from pyargs (fixes issue #45)
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243
96b78e78a235 pycall: add support for keyword arguments from pyargs (fixes issue #45)
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244 }