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
|
/*
* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _PY_UTILS_H
#define _PY_UTILS_H
template <typename T, typename TfromPy>
struct object_from_python
{
object_from_python() {
boost::python::converter::registry::insert
(&TfromPy::convertible, &TfromPy::construct,
boost::python::type_id<T>());
}
};
template <typename T, typename TtoPy, typename TfromPy>
struct register_python_conversion
{
register_python_conversion() {
boost::python::to_python_converter<T, TtoPy>();
object_from_python<T, TfromPy>();
}
};
template <typename T>
struct register_optional_to_python : public boost::noncopyable
{
struct optional_to_python
{
static PyObject * convert(const boost::optional<T>& value)
{
return boost::python::incref
(value ? boost::python::to_python_value<T>()(*value) :
boost::python::detail::none());
}
};
struct optional_from_python
{
static void * convertible(PyObject * source)
{
using namespace boost::python::converter;
if (source == Py_None)
return source;
const registration& converters(registered<T>::converters);
if (implicit_rvalue_convertible_from_python(source, converters)) {
rvalue_from_python_stage1_data data =
rvalue_from_python_stage1(source, converters);
return rvalue_from_python_stage2(source, data, converters);
}
return NULL;
}
static void construct(PyObject * source,
boost::python::converter::rvalue_from_python_stage1_data * data)
{
using namespace boost::python::converter;
void * const storage =
reinterpret_cast<rvalue_from_python_storage<T> *>(data)->storage.bytes;
if (data->convertible == source) // == None
new (storage) boost::optional<T>(); // A Boost uninitialized value
else
new (storage) boost::optional<T>(*reinterpret_cast<T *>(data->convertible));
data->convertible = storage;
}
};
explicit register_optional_to_python() {
register_python_conversion<boost::optional<T>,
optional_to_python, optional_from_python>();
}
};
namespace boost { namespace python {
// Use expr to create the PyObject corresponding to x
# define BOOST_PYTHON_RETURN_TO_PYTHON_BY_VALUE(T, expr, pytype)\
template <> struct to_python_value<T&> \
: detail::builtin_to_python \
{ \
inline PyObject* operator()(T const& x) const \
{ \
return (expr); \
} \
inline PyTypeObject const* get_pytype() const \
{ \
return (pytype); \
} \
}; \
template <> struct to_python_value<T const&> \
: detail::builtin_to_python \
{ \
inline PyObject* operator()(T const& x) const \
{ \
return (expr); \
} \
inline PyTypeObject const* get_pytype() const \
{ \
return (pytype); \
} \
};
# define BOOST_PYTHON_ARG_TO_PYTHON_BY_VALUE(T, expr) \
namespace converter \
{ \
template <> struct arg_to_python< T > \
: handle<> \
{ \
arg_to_python(T const& x) \
: python::handle<>(expr) {} \
}; \
}
// Specialize argument and return value converters for T using expr
# define BOOST_PYTHON_TO_PYTHON_BY_VALUE(T, expr, pytype) \
BOOST_PYTHON_RETURN_TO_PYTHON_BY_VALUE(T,expr, pytype) \
BOOST_PYTHON_ARG_TO_PYTHON_BY_VALUE(T,expr)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(ledger::string, ::PyUnicode_FromEncodedObject(::PyString_FromString(x.c_str()), "UTF-8", NULL), &PyUnicode_Type)
} } // namespace boost::python
//boost::python::register_ptr_to_python< boost::shared_ptr<Base> >();
#endif // _PY_UTILS_H
|
