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// Copyright David Abrahams 2004. Distributed under the Boost
// Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#include <boost/python/dict.hpp>
#include <boost/python/extract.hpp>
namespace boost { namespace python { namespace detail {
namespace
{
// When returning list objects from methods, it may turn out that the
// derived class is returning something else, perhaps something not
// even derived from list. Since it is generally harmless for a
// Boost.Python wrapper object to hold an object of a different
// type, and because calling list() with an object may in fact
// perform a conversion, the least-bad alternative is to assume that
// we have a Python list object and stuff it into the list result.
list assume_list(object const& o)
{
return list(detail::borrowed_reference(o.ptr()));
}
// No PyDict_CheckExact; roll our own.
inline bool check_exact(dict_base const* p)
{
return p->ptr()->ob_type == &PyDict_Type;
}
}
detail::new_reference dict_base::call(object const& arg_)
{
return (detail::new_reference)PyObject_CallFunction(
(PyObject*)&PyDict_Type, const_cast<char*>("(O)"),
arg_.ptr());
}
dict_base::dict_base()
: object(detail::new_reference(PyDict_New()))
{}
dict_base::dict_base(object_cref data)
: object(call(data))
{}
void dict_base::clear()
{
if (check_exact(this))
PyDict_Clear(this->ptr());
else
this->attr("clear")();
}
dict dict_base::copy()
{
if (check_exact(this))
{
return dict(detail::new_reference(
PyDict_Copy(this->ptr())));
}
else
{
return dict(detail::borrowed_reference(
this->attr("copy")().ptr()
));
}
}
object dict_base::get(object_cref k) const
{
if (check_exact(this))
{
PyObject* result = PyDict_GetItem(this->ptr(),k.ptr());
return object(detail::borrowed_reference(result ? result : Py_None));
}
else
{
return this->attr("get")(k);
}
}
object dict_base::get(object_cref k, object_cref d) const
{
return this->attr("get")(k,d);
}
bool dict_base::has_key(object_cref k) const
{
return extract<bool>(this->contains(k));
}
list dict_base::items() const
{
if (check_exact(this))
{
return list(detail::new_reference(
PyDict_Items(this->ptr())));
}
else
{
return assume_list(this->attr("items")());
}
}
object dict_base::iteritems() const
{
return this->attr("iteritems")();
}
object dict_base::iterkeys() const
{
return this->attr("iterkeys")();
}
object dict_base::itervalues() const
{
return this->attr("itervalues")();
}
list dict_base::keys() const
{
if (check_exact(this))
{
return list(detail::new_reference(
PyDict_Keys(this->ptr())));
}
else
{
return assume_list(this->attr("keys")());
}
}
tuple dict_base::popitem()
{
return tuple(detail::borrowed_reference(
this->attr("popitem")().ptr()
));
}
object dict_base::setdefault(object_cref k)
{
return this->attr("setdefault")(k);
}
object dict_base::setdefault(object_cref k, object_cref d)
{
return this->attr("setdefault")(k,d);
}
void dict_base::update(object_cref other)
{
if (check_exact(this))
{
if (PyDict_Update(this->ptr(),other.ptr()) == -1)
throw_error_already_set();
}
else
{
this->attr("update")(other);
}
}
list dict_base::values() const
{
if (check_exact(this))
{
return list(detail::new_reference(
PyDict_Values(this->ptr())));
}
else
{
return assume_list(this->attr("values")());
}
}
static struct register_dict_pytype_ptr
{
register_dict_pytype_ptr()
{
const_cast<converter::registration &>(
converter::registry::lookup(boost::python::type_id<boost::python::dict>())
).m_class_object = &PyDict_Type;
}
}register_dict_pytype_ptr_;
}}} // namespace boost::python
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