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
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
|
#ifndef SCITBX_BOOST_PYTHON_CONTAINER_CONVERSIONS_H
#define SCITBX_BOOST_PYTHON_CONTAINER_CONVERSIONS_H
#include <boost/python/list.hpp>
#include <boost/python/tuple.hpp>
#include <boost/python/extract.hpp>
#include <boost/python/to_python_converter.hpp>
namespace scitbx { namespace boost_python { namespace container_conversions {
template <typename ContainerType>
struct to_tuple
{
static PyObject* convert(ContainerType const& a)
{
boost::python::list result;
typedef typename ContainerType::const_iterator const_iter;
for(const_iter p=a.begin();p!=a.end();p++) {
result.append(boost::python::object(*p));
}
return boost::python::incref(boost::python::tuple(result).ptr());
}
static const PyTypeObject* get_pytype() { return &PyTuple_Type; }
};
struct default_policy
{
static bool check_convertibility_per_element() { return false; }
template <typename ContainerType>
static bool check_size(boost::type<ContainerType>, std::size_t /*sz*/)
{
return true;
}
template <typename ContainerType>
static void assert_size(boost::type<ContainerType>, std::size_t /*sz*/) {}
template <typename ContainerType>
static void reserve(ContainerType& a, std::size_t sz) {}
};
struct fixed_size_policy
{
static bool check_convertibility_per_element() { return true; }
template <typename ContainerType>
static bool check_size(boost::type<ContainerType>, std::size_t sz)
{
return ContainerType::size() == sz;
}
template <typename ContainerType>
static void assert_size(boost::type<ContainerType>, std::size_t sz)
{
if (!check_size(boost::type<ContainerType>(), sz)) {
PyErr_SetString(PyExc_RuntimeError,
"Insufficient elements for fixed-size array.");
boost::python::throw_error_already_set();
}
}
template <typename ContainerType>
static void reserve(ContainerType& /*a*/, std::size_t sz)
{
if (sz > ContainerType::size()) {
PyErr_SetString(PyExc_RuntimeError,
"Too many elements for fixed-size array.");
boost::python::throw_error_already_set();
}
}
template <typename ContainerType, typename ValueType>
static void set_value(ContainerType& a, std::size_t i, ValueType const& v)
{
reserve(a, i+1);
a[i] = v;
}
};
struct variable_capacity_policy : default_policy
{
template <typename ContainerType>
static void reserve(ContainerType& a, std::size_t sz)
{
a.reserve(sz);
}
template <typename ContainerType, typename ValueType>
static void set_value(
ContainerType& a,
std::size_t
#if !defined(NDEBUG)
i
#endif
,
ValueType const& v)
{
assert(a.size() == i);
a.push_back(v);
}
};
struct fixed_capacity_policy : variable_capacity_policy
{
template <typename ContainerType>
static bool check_size(boost::type<ContainerType>, std::size_t sz)
{
return ContainerType::max_size() >= sz;
}
};
struct linked_list_policy : default_policy
{
template <typename ContainerType, typename ValueType>
static void
set_value(ContainerType& a, std::size_t /*i*/, ValueType const& v)
{
a.push_back(v);
}
};
struct set_policy : default_policy
{
template <typename ContainerType, typename ValueType>
static void
set_value(ContainerType& a, std::size_t /*i*/, ValueType const& v)
{
a.insert(v);
}
};
template <typename ContainerType, typename ConversionPolicy>
struct from_python_sequence
{
typedef typename ContainerType::value_type container_element_type;
from_python_sequence()
{
boost::python::converter::registry::push_back(
&convertible,
&construct,
boost::python::type_id<ContainerType>());
}
static void* convertible(PyObject* obj_ptr)
{
if (!( PyList_Check(obj_ptr)
|| PyTuple_Check(obj_ptr)
|| PyIter_Check(obj_ptr)
|| PyRange_Check(obj_ptr)
|| ( !PyUnicode_Check(obj_ptr)
&& ( Py_TYPE(obj_ptr) == 0
|| Py_TYPE(Py_TYPE(obj_ptr)) == 0
|| Py_TYPE(Py_TYPE(obj_ptr))->tp_name == 0
|| std::strcmp(
Py_TYPE(Py_TYPE(obj_ptr))->tp_name,
"Boost.Python.class") != 0)
&& PyObject_HasAttrString(obj_ptr, "__len__")
&& PyObject_HasAttrString(obj_ptr, "__getitem__")))) return 0;
boost::python::handle<> obj_iter(
boost::python::allow_null(PyObject_GetIter(obj_ptr)));
if (!obj_iter.get()) { // must be convertible to an iterator
PyErr_Clear();
return 0;
}
if (ConversionPolicy::check_convertibility_per_element()) {
int obj_size = PyObject_Length(obj_ptr);
if (obj_size < 0) { // must be a measurable sequence
PyErr_Clear();
return 0;
}
if (!ConversionPolicy::check_size(
boost::type<ContainerType>(), obj_size)) return 0;
bool is_range = PyRange_Check(obj_ptr);
std::size_t i=0;
if (!all_elements_convertible(obj_iter, is_range, i)) return 0;
if (!is_range) assert(i == (std::size_t)obj_size);
}
return obj_ptr;
}
// This loop factored out by Achim Domma to avoid Visual C++
// Internal Compiler Error.
static bool
all_elements_convertible(
boost::python::handle<>& obj_iter,
bool is_range,
std::size_t& i)
{
for(;;i++) {
boost::python::handle<> py_elem_hdl(
boost::python::allow_null(PyIter_Next(obj_iter.get())));
if (PyErr_Occurred()) {
PyErr_Clear();
return false;
}
if (!py_elem_hdl.get()) break; // end of iteration
boost::python::object py_elem_obj(py_elem_hdl);
boost::python::extract<container_element_type>
elem_proxy(py_elem_obj);
if (!elem_proxy.check()) return false;
if (is_range) break; // in a range all elements are of the same type
}
return true;
}
static void construct(
PyObject* obj_ptr,
boost::python::converter::rvalue_from_python_stage1_data* data)
{
boost::python::handle<> obj_iter(PyObject_GetIter(obj_ptr));
void* storage = (
(boost::python::converter::rvalue_from_python_storage<ContainerType>*)
data)->storage.bytes;
new (storage) ContainerType();
data->convertible = storage;
ContainerType& result = *((ContainerType*)storage);
std::size_t i=0;
for(;;i++) {
boost::python::handle<> py_elem_hdl(
boost::python::allow_null(PyIter_Next(obj_iter.get())));
if (PyErr_Occurred()) boost::python::throw_error_already_set();
if (!py_elem_hdl.get()) break; // end of iteration
boost::python::object py_elem_obj(py_elem_hdl);
boost::python::extract<container_element_type> elem_proxy(py_elem_obj);
ConversionPolicy::set_value(result, i, elem_proxy());
}
ConversionPolicy::assert_size(boost::type<ContainerType>(), i);
}
};
template <typename ContainerType>
struct to_tuple_mapping
{
to_tuple_mapping() {
boost::python::to_python_converter<
ContainerType,
to_tuple<ContainerType>
#ifdef BOOST_PYTHON_SUPPORTS_PY_SIGNATURES
, true
#endif
>();
}
};
template <typename ContainerType, typename ConversionPolicy>
struct tuple_mapping : to_tuple_mapping<ContainerType>
{
tuple_mapping() {
from_python_sequence<
ContainerType,
ConversionPolicy>();
}
};
template <typename ContainerType>
struct tuple_mapping_fixed_size
{
tuple_mapping_fixed_size() {
tuple_mapping<
ContainerType,
fixed_size_policy>();
}
};
template <typename ContainerType>
struct tuple_mapping_fixed_capacity
{
tuple_mapping_fixed_capacity() {
tuple_mapping<
ContainerType,
fixed_capacity_policy>();
}
};
template <typename ContainerType>
struct tuple_mapping_variable_capacity
{
tuple_mapping_variable_capacity() {
tuple_mapping<
ContainerType,
variable_capacity_policy>();
}
};
template <typename ContainerType>
struct tuple_mapping_set
{
tuple_mapping_set() {
tuple_mapping<
ContainerType,
set_policy>();
}
};
}}} // namespace scitbx::boost_python::container_conversions
#endif // SCITBX_BOOST_PYTHON_CONTAINER_CONVERSIONS_H
|
