1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
#ifndef WREPORT_PYTHON_TYPE_H
#define WREPORT_PYTHON_TYPE_H
#include "core.h"
#include "methods.h"
#include <array>
namespace wreport {
namespace python {
template<typename Child, typename IMPL>
struct Getter
{
typedef IMPL Impl;
constexpr static const char* name = "TODO";
constexpr static const char* doc = "TODO: write getter documentation";
constexpr static void* closure = nullptr;
static PyObject* get(Impl* self, void* closure)
{
PyErr_Format(PyExc_NotImplementedError, "getter %s is not implemented", Child::name);
return nullptr;
}
static constexpr PyGetSetDef def()
{
return PyGetSetDef {const_cast<char*>(Child::name), (getter)Child::get, nullptr, const_cast<char*>(Child::doc), Child::closure};
}
};
template<typename... GETSETTERS>
struct GetSetters
{
typedef std::array<PyGetSetDef, sizeof...(GETSETTERS) + 1> Data;
Data m_data;
GetSetters()
: m_data({GETSETTERS::def()..., PyGetSetDef()})
{
}
PyGetSetDef* as_py() { return const_cast<PyGetSetDef*>(m_data.data()); }
};
template<typename Impl>
struct MethGenericEnter : MethNoargs<MethGenericEnter<Impl>, Impl>
{
constexpr static const char* name = "__enter__";
constexpr static const char* returns = "self";
constexpr static const char* summary = "Context manager __enter__";
constexpr static const char* doc = "Returns the object itself";
static PyObject* run(Impl* self)
{
Py_INCREF(self);
return (PyObject*)self;
}
};
template<typename Impl>
struct MethGenericExit : MethKwargs<MethGenericExit<Impl>, Impl>
{
constexpr static const char* name = "__exit__";
constexpr static const char* signature = "ext_type, ext_val, ext_tb";
constexpr static const char* returns = "";
constexpr static const char* summary = "";
static PyObject* run(Impl* self, PyObject* args, PyObject* kw)
{
static const char* kwlist[] = { "exc_type", "exc_val", "exc_tb", nullptr };
PyObject* exc_type = nullptr;
PyObject* exc_val = nullptr;
PyObject* exc_tb = nullptr;
if (!PyArg_ParseTupleAndKeywords(args, kw, "OOO", const_cast<char**>(kwlist),
&exc_type, &exc_val, &exc_tb))
return nullptr;
return self->python__exit__();
}
};
/*
* Base class for implementing python classes
*/
template<typename Child, typename IMPL>
struct Type
{
typedef IMPL Impl;
#if 0
// Not supported in Centos 7, use this when we can use a newer C++ compiler
PySequenceMethods _sequence_methods {
.sq_length = (lenfunc)Child::sq_length,
.sq_concat = (binaryfunc)Child::sq_concat,
.sq_repeat = (ssizeargfunc)Child::sq_repeat,
.sq_item = (ssizeargfunc)Child::sq_item,
.sq_ass_item = (ssizeobjargproc)Child::sq_ass_item,
.sq_contains = (objobjproc)Child::sq_contains,
.sq_inplace_concat = (binaryfunc)Child::sq_inplace_concat,
.sq_inplace_repeat = (ssizeargfunc)Child::sq_inplace_repeat,
};
PyMappingMethods _mapping_methods {
.mp_length = (lenfunc)Child::mp_length,
.mp_subscript = (binaryfunc)ChilChild::mp_subscript,
.mp_ass_subscript = (objobjargproc)Child::mp_ass_subscript,
};
#else
PySequenceMethods _sequence_methods;
PyMappingMethods _mapping_methods;
Type()
{
_sequence_methods.sq_length = (lenfunc)Child::sq_length;
_sequence_methods.sq_concat = (binaryfunc)Child::sq_concat;
_sequence_methods.sq_repeat = (ssizeargfunc)Child::sq_repeat;
_sequence_methods.sq_item = (ssizeargfunc)Child::sq_item;
_sequence_methods.sq_ass_item = (ssizeobjargproc)Child::sq_ass_item;
_sequence_methods.sq_contains = (objobjproc)Child::sq_contains;
_sequence_methods.sq_inplace_concat = (binaryfunc)Child::sq_inplace_concat;
_sequence_methods.sq_inplace_repeat = (ssizeargfunc)Child::sq_inplace_repeat;
_mapping_methods.mp_length = (lenfunc)Child::mp_length;
_mapping_methods.mp_subscript = (binaryfunc)Child::mp_subscript;
_mapping_methods.mp_ass_subscript = (objobjargproc)Child::mp_ass_subscript;
}
#endif
static PyObject* _str(Impl* self)
{
return PyUnicode_FromString(Child::name);
}
static PyObject* _repr(Impl* self)
{
std::string res = Child::qual_name;
res += " object";
return PyUnicode_FromString(res.c_str());
}
constexpr static getiterfunc _iter = nullptr;
constexpr static iternextfunc _iternext = nullptr;
constexpr static richcmpfunc _richcompare = nullptr;
constexpr static hashfunc _hash = nullptr;
constexpr static ternaryfunc _call = nullptr;
constexpr static lenfunc sq_length = nullptr;
constexpr static binaryfunc sq_concat = nullptr;
constexpr static ssizeargfunc sq_repeat = nullptr;
constexpr static ssizeargfunc sq_item = nullptr;
constexpr static ssizeobjargproc sq_ass_item = nullptr;
constexpr static objobjproc sq_contains = nullptr;
constexpr static binaryfunc sq_inplace_concat = nullptr;
constexpr static ssizeargfunc sq_inplace_repeat = nullptr;
constexpr static lenfunc mp_length = nullptr;
constexpr static binaryfunc mp_subscript = nullptr;
constexpr static objobjargproc mp_ass_subscript = nullptr;
static int _init(Impl* self, PyObject* args, PyObject* kw)
{
// Default implementation raising NotImplementedError
PyErr_Format(PyExc_NotImplementedError, "%s objects cannot be constructed explicitly", Child::qual_name);
return -1;
}
/**
* Define this type in the python interpreter.
*
* It fills in \a type_object, and if module is provided, it also registers
* the constructor in the module.
*/
void define(PyTypeObject*& type_object, PyObject* module=nullptr)
{
Child* d = static_cast<Child*>(this);
unsigned long tp_flags = Py_TPFLAGS_DEFAULT;
PySequenceMethods* tp_as_sequence = nullptr;
if ((void*)Child::sq_length || (void*)Child::sq_concat || (void*)Child::sq_repeat ||
(void*)Child::sq_item || (void*)Child::sq_ass_item || (void*)Child::sq_contains ||
(void*)Child::sq_inplace_concat || (void*)Child::sq_inplace_repeat )
{
tp_as_sequence = &_sequence_methods;
}
PyMappingMethods* tp_as_mapping = nullptr;
if ((void*)Child::mp_length || (void*)Child::mp_subscript || (void*)Child::mp_ass_subscript)
tp_as_mapping = &_mapping_methods;
py_unique_ptr<PyTypeObject> type = new PyTypeObject {
PyVarObject_HEAD_INIT(NULL, 0)
Child::qual_name, // tp_name
sizeof(Impl), // tp_basicsize
0, // tp_itemsize
(destructor)Child::_dealloc, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_reserved
(reprfunc)Child::_repr, // tp_repr
0, // tp_as_number
tp_as_sequence, // tp_as_sequence
tp_as_mapping, // tp_as_mapping
(hashfunc)Child::_hash, // tp_hash
(ternaryfunc)Child::_call, // tp_call
(reprfunc)Child::_str, // tp_str
0, // tp_getattro
0, // tp_setattro
0, // tp_as_buffer
tp_flags, // tp_flags
Child::doc, // tp_doc
0, // tp_traverse
0, // tp_clear
(richcmpfunc)Child::_richcompare, // tp_richcompare
0, // tp_weaklistoffset
(getiterfunc)Child::_iter, // tp_iter
(iternextfunc)Child::_iternext, // tp_iternext
d->methods.as_py(), // tp_methods
0, // tp_members
d->getsetters.as_py(), // tp_getset
0, // tp_base
0, // tp_dict
0, // tp_descr_get
0, // tp_descr_set
0, // tp_dictoffset
(initproc)Child::_init, // tp_init
0, // tp_alloc
PyType_GenericNew, // tp_new
0, // tp_free
0, // tp_is_gc
0, // tp_bases
0, // tp_mro
0, // tp_cache
0, // tp_subclasses
0, // tp_weaklist
0, // tp_del
0, // tp_version_tag
0, // tp_finalize
};
if (PyType_Ready(type) != 0)
throw PythonException();
if (module)
{
type.incref();
if (PyModule_AddObject(module, Child::name, (PyObject*)type.get()) != 0)
throw PythonException();
}
type_object = type.release();
}
};
}
}
#endif
|
