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/*************************************************************************
* odil - Copyright (C) Universite de Strasbourg
* Distributed under the terms of the CeCILL-B license, as published by
* the CEA-CNRS-INRIA. Refer to the LICENSE file or to
* http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html
* for details.
************************************************************************/
#ifndef _80f85d92_d528_44cf_a352_98eac994b9c2
#define _80f85d92_d528_44cf_a352_98eac994b9c2
#include <pybind11/pybind11.h>
#include <pybind11/stl_bind.h>
#include "odil/Value.h"
#include "Value.h"
namespace odil
{
namespace wrappers
{
template<typename T>
GetItem::result_type
GetItem
::operator()(T const & value) const
{
return pybind11::cast(value[this->index]);
}
template<typename T>
GetSlice::result_type
GetSlice
::operator()(T const & value) const
{
result_type result(this->slice_length);
std::size_t d = 0;
for(ssize_t s = this->start; s != this->stop; s += this->step)
{
result[d++] = value[s];
}
return result;
}
template<typename T>
SetItem::result_type
SetItem
::operator()(T & value) const
{
value[this->index] = this->item.cast<typename T::value_type>();
}
template<typename T>
Iterate::result_type
Iterate
::operator()(T const & value) const
{
return pybind11::make_iterator(value.begin(), value.end());
}
template<typename T>
Append::result_type
Append
::operator()(T & value) const
{
value.push_back(this->item.cast<typename T::value_type>());
}
template<typename T>
Pickle::result_type
Pickle
::operator()(T const & value) const
{
return pybind11::make_tuple(this->type, value);
}
template<typename T>
pybind11::tuple pickle_pod_container(T const & container)
{
return pybind11::make_tuple(
pybind11::bytes(
reinterpret_cast<char const*>(container.data()),
sizeof(typename T::value_type)*container.size()));
}
template<typename T>
T unpickle_pod_container(pybind11::tuple pickled)
{
char * raw_buffer;
ssize_t length;
PYBIND11_BYTES_AS_STRING_AND_SIZE(
pickled[0].cast<pybind11::bytes>().ptr(), &raw_buffer, &length);
auto buffer = reinterpret_cast<typename T::value_type *>(raw_buffer);
return T(buffer, buffer+length/sizeof(typename T::value_type));
}
template<typename T>
pybind11::tuple pickle_object_container(T const & container)
{
pybind11::tuple pickled(container.size());
for(std::size_t i=0; i<container.size(); ++i)
{
pickled[i] = container[i];
}
return pickled;
}
template<typename T>
T unpickle_object_container(pybind11::tuple pickled)
{
T value(pickled.size());
for(std::size_t i=0; i<value.size(); ++i)
{
value[i] = pickled[i].cast<typename T::value_type>();
}
return value;
}
template<typename Vector, typename holder_type, typename... Args>
pybind11::class_<Vector, holder_type>
bind_vector(pybind11::handle scope, std::string const &name, Args&&... args)
{
using Class_ = pybind11::class_<Vector, holder_type>;
// If the value_type is unregistered (e.g. a converting type) or is itself
// registered module-local then make the vector binding module-local
// as well:
using vtype = typename Vector::value_type;
auto vtype_info = pybind11::detail::get_type_info(typeid(vtype));
bool local = !vtype_info || vtype_info->module_local;
Class_ cl(
scope, name.c_str(), pybind11::module_local(local),
std::forward<Args>(args)...);
// Declare the buffer interface if a buffer_protocol() is passed in
pybind11::detail::vector_buffer<Vector, Class_, Args...>(cl);
cl.def(pybind11::init<>());
// Register copy constructor (if possible)
pybind11::detail::vector_if_copy_constructible<Vector, Class_>(cl);
// Register comparison-related operators and functions (if possible)
pybind11::detail::vector_if_equal_operator<Vector, Class_>(cl);
// Register stream insertion operator (if possible)
pybind11::detail::vector_if_insertion_operator<Vector, Class_>(cl, name);
// Modifiers require copyable vector value type
pybind11::detail::vector_modifiers<Vector, Class_>(cl);
// Accessor and iterator; return by value if copyable, otherwise we return
// by ref + keep-alive
using T = typename Vector::value_type;
using SizeType = long; //typename Vector::size_type;
using ItType = typename Vector::iterator;
cl.def(
"__getitem__",
[](Vector &v, SizeType i) -> T &
{
if((i>=0 && i >= SizeType(v.size())) || (i<0 && i < -SizeType(v.size())))
{
throw pybind11::index_error();
}
return v[i>=0?i:v.size()+i];
},
pybind11::return_value_policy::reference_internal // ref + keepalive
);
cl.def(
"__iter__",
[](Vector &v)
{
return pybind11::make_iterator<
pybind11::return_value_policy::reference_internal, ItType, ItType, T&
>(v.begin(), v.end());
},
pybind11::keep_alive<0, 1>() /* Essential: keep list alive while iterator exists */
);
cl.def(
"__bool__", [](const Vector &v) { return !v.empty(); },
"Check whether the list is nonempty");
cl.def("__len__", &Vector::size);
return cl;
}
}
}
#endif // _80f85d92_d528_44cf_a352_98eac994b9c2
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