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Roll back most of Dave Hawkes' changes for the time being.

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[SVN r14501]
This commit is contained in:
Dave Abrahams
2002-07-17 18:36:14 +00:00
parent 6ac5735d14
commit f9a67b34b2
8 changed files with 19 additions and 341 deletions
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137
src/module.cpp
View File

@@ -7,107 +7,16 @@
// producing this work.
#include <boost/python/detail/module_base.hpp>
#include <boost/python/detail/module_init.hpp>
#include <boost/python/detail/module_info.hpp>
#include <boost/python/object/function.hpp>
#include <boost/python/object/class.hpp>
#include <boost/python/cast.hpp>
namespace boost { namespace python { namespace detail {
namespace {
object getattr_or_none(object const &obj, const char *name)
{
if(PyObject_HasAttrString(obj.ptr(), const_cast<char*>(name)))
return obj.attr(name);
else
return object();
}
// Initialise a new sub-module, or return an existing one.
// This will also create any missing parents along the way.
handle<> init_sub_module(const char* name, PyMethodDef *initial_methods, module_info* pmi)
{
if(name == NULL)
// just create a dummy module with an empty reference
return handle<>();
// initialise various iterators, etc.
object parent_module(pmi->get_module()), current_module(parent_module);
std::string s_name(name), b_name;
if(s_name.size() == 0)
// use the default module name if it is not supplied
s_name = pmi->get_module_name();
std::string::size_type p_pos(0);
for(int l = 0;;++l) {
// find the next module name in the 'dotted' name
std::string::size_type dot_pos = s_name.find('.', p_pos);
// p_pos is the absolute position, but the length is needed
if(dot_pos != std::string::npos)
dot_pos -= p_pos;
// the current module name being processed, iterating from the parent
// to the right hand sub-modules
b_name = s_name.substr(p_pos, dot_pos);
if(l == 0) {
// process the top level parent module name
if(dot_pos == 0)
// allow a shortcut module notation so we can do module(".submodule")
b_name = pmi->get_module_name();
// check the base name is the correct parent name else assert
assert(b_name.compare(pmi->get_module_name()) == 0);
if(!parent_module) {
// The main parent module does not exist yet, so create it here
parent_module = object(python::borrowed(Py_InitModule(
const_cast<char*>(b_name.c_str()),
initial_methods)));
// and set up the module iterator
current_module = parent_module;
// initialise the global parent module so it can be found later
pmi->set_module(parent_module);
}
} else {
// now processing a sub-module
// try to find and verify an existing sub-module of the correct name and type
object existing_sub_module(getattr_or_none(current_module, b_name.c_str()));
if(existing_sub_module) {
// An attribute of the same name has been found
object module_type((python::detail::new_reference)PyObject_Type(parent_module.ptr()));
// test its type against the parent
if(!PyObject_IsSubclass(existing_sub_module.ptr(), module_type.ptr()))
// not actually a module, so it can't be used
existing_sub_module = object();
}
// was an existing sub-module found ?
if(!existing_sub_module) {
// no, then it is created here
// build up the full path name up to and including the current sub-module
std::string full_name(s_name.substr(0, dot_pos));
// create the module
existing_sub_module = object(python::borrowed(Py_InitModule(
const_cast<char*>(full_name.c_str()),
initial_methods)));
// add the sub-module to the attributes of its immediate parent
current_module.attr(b_name.c_str()) = existing_sub_module;
}
// we now have a new current module to iterate
current_module = existing_sub_module;
}
// no more modules ?
if(dot_pos == std::string::npos)
break;
// advance over the dot
p_pos += dot_pos + 1;
}
// return the actual sub-module that was either found or created
return handle<>(python::borrowed(current_module.ptr()));
}
}
module_base::module_base(const char* name)
: m_module(init_sub_module(name, initial_methods, get_module_info()))
: m_module(
python::borrowed(Py_InitModule(const_cast<char*>(name), initial_methods))
)
{
set_prior_module(m_module);
}
module_base::~module_base()
@@ -133,16 +42,7 @@ void module_base::add(type_handle const& x)
void module_base::add_class(type_handle const& class_obj)
{
add_class(class_obj, objects::class_base::
get_class_context_object(class_obj.get()->tp_name, class_obj));
}
void module_base::add_class(type_handle const& class_obj, handle<> const& context)
{
if(context.get()) {
objects::function::
add_to_namespace(context, ((PyTypeObject*)class_obj.get())->tp_name, class_obj);
}
this->add(class_obj);
handle<> module_name(
PyObject_GetAttrString(
@@ -150,38 +50,13 @@ void module_base::add_class(type_handle const& class_obj, handle<> const& contex
);
int status = PyObject_SetAttrString(
handle<>(class_obj).get(), const_cast<char*>("__module__"), module_name.get());
python::upcast<PyObject>(class_obj.get())
, const_cast<char*>("__module__"), module_name.get());
if (status == -1)
throw_error_already_set();
}
void module_base::set_module_info(module_info & mi)
{
get_module_info_ref() = &mi;
}
module_info* module_base::get_module_info()
{
return get_module_info_ref();
}
module_info*& module_base::get_module_info_ref()
{
static module_info* pmi = NULL;
return pmi;
}
void module_base::set_prior_module(handle<> const& m)
{
get_module_info()->set_prior_module(python::object(m));
}
handle<> module_base::get_prior_module()
{
return handle<>(python::borrowed(get_module_info()->get_prior_module().ptr()));
}
PyMethodDef module_base::initial_methods[] = { { 0, 0, 0, 0 } };
}}} // namespace boost::python::detail

117
src/object/class.cpp
View File

@@ -3,13 +3,10 @@
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#include <boost/python/detail/module_base.hpp>
#include <boost/python/converter/registry.hpp>
#include <boost/python/object/class.hpp>
#include <boost/python/object/find_instance.hpp>
#include <boost/python/detail/map_entry.hpp>
#include <boost/python/detail/module_info.hpp>
#include <boost/python/class.hpp>
#include <boost/python/object.hpp>
#include <boost/detail/binary_search.hpp>
#include <boost/python/self.hpp>
@@ -249,12 +246,6 @@ namespace objects
char const* name, std::size_t num_types, class_id const* const types)
{
assert(num_types >= 1);
// is this class already registered?
m_object = query_class(types[0]);
if(m_object.get()) {
return;
}
// Build a tuple of the base Python type objects. If no bases
// were declared, we'll use our class_type() as the single base
@@ -269,15 +260,9 @@ namespace objects
PyTuple_SET_ITEM(bases.get(), i - 1, upcast<PyObject>(c.release()));
}
// we now need just the base name
std::string base_name(name);
std::string::size_type dot_pos = base_name.rfind('.');
if(dot_pos != std::string::npos)
base_name = base_name.substr(dot_pos + 1);
// Build the (name, bases, dict) tuple for creating the new class
handle<> args(PyTuple_New(3));
PyTuple_SET_ITEM(args.get(), 0, incref(python::object(base_name.c_str()).ptr()));
PyTuple_SET_ITEM(args.get(), 0, incref(python::object(name).ptr()));
PyTuple_SET_ITEM(args.get(), 1, bases.release());
handle<> d(PyDict_New());
PyTuple_SET_ITEM(args.get(), 2, d.release());
@@ -319,107 +304,9 @@ namespace objects
throw_error_already_set();
}
namespace {
class empty_class {};
void transfer_attributes(object const& src, object const& dst)
{
object attrs((python::detail::new_reference)PyObject_Dir(src.ptr()));
if(PyList_Check(attrs.ptr())) {
int sz = PyList_Size(attrs.ptr());
for(int i = 0; i < sz; i++) {
PyObject *attr_name = PyList_GET_ITEM(attrs.ptr(), i);
object attr((python::detail::new_reference)PyObject_GetAttr(src.ptr(), attr_name));
// only transfer boost classes
if(attr.ptr()->ob_type == &class_metatype_object)
PyObject_SetAttr(dst.ptr(), attr_name, attr.ptr());
}
}
}
object getattr_or_none(object const &obj, const char *name)
{
if(PyObject_HasAttrString(obj.ptr(), const_cast<char*>(name)))
return obj.attr(name);
else
return object();
}
}
// get a class context for nested classes
handle<> class_base::get_class_context_object(const char* name, type_handle const& class_obj)
{
// initialise various iterators, etc.
std::string s_name(name), b_name;
std::string::size_type p_pos(0);
python::object current_object(python::detail::module_base::get_prior_module());
for(;;) {
// find the next class name in the 'dotted' name
std::string::size_type dot_pos = s_name.find('.', p_pos);
// have we completed up to the current class ?
// p_pos is the absolute position, but the length is needed
if(dot_pos != std::string::npos)
dot_pos -= p_pos;
// the current class name being processed, iterating from left to right
b_name = s_name.substr(p_pos, dot_pos);
if(dot_pos == std::string::npos) {
// this is the last class in the chain, is it here already
python::object existing_object(getattr_or_none(current_object, b_name.c_str()));
if(existing_object) {
// yes
if(PyObject_TypeCheck(existing_object.ptr(), &PyType_Type)) {
PyTypeObject *pType = (PyTypeObject *) existing_object.ptr();
// is it one of ours?
if(pType->ob_type == &class_metatype_object) {
// then lets see if its our empty_class
type_handle r = query_class(python::type_id<empty_class>());
// is it registered as the empty_class?
if(r.get() == pType) {
// yes, then we can transfer attributes
transfer_attributes(python::object(handle<>(r)), python::object(handle<>(class_obj)));
} else {
// the user must have created it already.
// so we don't need to add it
return handle<>();
}
}
}
}
break;
}
// try to find an existing parent of the nested class
current_object = getattr_or_none(current_object, b_name.c_str());
if(!current_object) {
// If we can't find it then insert a temporary class as a marker
std::string full_name(s_name.substr(0, dot_pos));
current_object = python::object(handle<>(boost::python::class_<empty_class>(full_name.c_str()).object()));
}
// we now have a new current object to iterate
// note that we could attach the nested class to something other
// than a parent class here as we are not testing the type,
// does this really matter?
// advance over the dot
p_pos += dot_pos + 1;
}
// return the actual sub-module that was either found or created
return handle<>(python::borrowed(current_object.ptr()));
}
class_base::class_base()
{
}
class_base const& class_base::empty_class_base()
{
static class_base ecb;
return ecb;
}
BOOST_PYTHON_DECL type_handle registered_class_object(class_id id)
{
return query_class(id);
return objects::query_class(id);
}
} // namespace objects