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- // Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC")
- //
- // Permission to use, copy, modify, and/or distribute this software for any
- // purpose with or without fee is hereby granted, provided that the above
- // copyright notice and this permission notice appear in all copies.
- //
- // THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- // REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- // AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- // INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- // LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- // OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- // PERFORMANCE OF THIS SOFTWARE.
- // Enable this if you use s# variants with PyArg_ParseTuple(), see
- // http://docs.python.org/py3k/c-api/arg.html#strings-and-buffers
- //#define PY_SSIZE_T_CLEAN
- // Python.h needs to be placed at the head of the program file, see:
- // http://docs.python.org/py3k/extending/extending.html#a-simple-example
- #include <Python.h>
- #include <datasrc/zone_table_accessor.h>
- #include "datasrc.h"
- #include "zonetable_accessor_python.h"
- #include "zonetable_iterator_python.h"
- using namespace std;
- using namespace isc::datasrc;
- using namespace isc::datasrc::python;
- namespace {
- // The s_* Class simply covers one instantiation of the object
- class s_ZoneTableAccessor : public PyObject {
- public:
- s_ZoneTableAccessor() :
- cppobj(ConstZoneTableAccessorPtr()),
- base_obj(NULL)
- {}
- ConstZoneTableAccessorPtr cppobj;
- // This is a reference to a base object; if the object of this class
- // depends on another object to be in scope during its lifetime,
- // we use INCREF the base object upon creation, and DECREF it at
- // the end of the destructor
- // This is an optional argument to createXXX(). If NULL, it is ignored.
- PyObject* base_obj;
- };
- int
- ZoneTableAccessor_init(PyObject*, PyObject*, PyObject*) {
- // can't be called directly
- PyErr_SetString(PyExc_TypeError,
- "ZoneTableAccessor cannot be constructed directly");
- return (-1);
- }
- void
- ZoneTableAccessor_destroy(PyObject* po_self) {
- s_ZoneTableAccessor* const self =
- static_cast<s_ZoneTableAccessor*>(po_self);
- // cppobj is a shared ptr, but to make sure things are not destroyed in
- // the wrong order, we reset it here.
- self->cppobj.reset();
- if (self->base_obj != NULL) {
- Py_DECREF(self->base_obj);
- }
- Py_TYPE(self)->tp_free(self);
- }
- PyObject*
- ZoneTableAccessor_iter(PyObject* po_self) {
- s_ZoneTableAccessor* const self =
- static_cast<s_ZoneTableAccessor*>(po_self);
- try {
- return (createZoneTableIteratorObject(self->cppobj->getIterator(),
- po_self));
- } catch (const std::exception& exc) {
- PyErr_SetString(getDataSourceException("Error"), exc.what());
- return (NULL);
- } catch (...) {
- PyErr_SetString(getDataSourceException("Error"),
- "Unexpected exception");
- return (NULL);
- }
- }
- // This list contains the actual set of functions we have in
- // python. Each entry has
- // 1. Python method name
- // 2. Our static function here
- // 3. Argument type
- // 4. Documentation
- PyMethodDef ZoneTableAccessor_methods[] = {
- { NULL, NULL, 0, NULL }
- };
- const char* const ZoneTableAccessor_doc = "\
- An accessor to a zone table for a data source.\n\
- \n\
- This class object is intended to be used by applications that load zones\
- into memory, so that the application can get a list of zones to be loaded.";
- } // end anonymous namespace
- namespace isc {
- namespace datasrc {
- namespace python {
- // This defines the complete type for reflection in python and
- // parsing of PyObject* to s_ZoneTableAccessor
- // Most of the functions are not actually implemented and NULL here.
- PyTypeObject zonetableaccessor_type = {
- PyVarObject_HEAD_INIT(NULL, 0)
- "datasrc.ZoneTableAccessor",
- sizeof(s_ZoneTableAccessor), // tp_basicsize
- 0, // tp_itemsize
- ZoneTableAccessor_destroy, // tp_dealloc
- NULL, // tp_print
- NULL, // tp_getattr
- NULL, // tp_setattr
- NULL, // tp_reserved
- NULL, // tp_repr
- NULL, // tp_as_number
- NULL, // tp_as_sequence
- NULL, // tp_as_mapping
- NULL, // tp_hash
- NULL, // tp_call
- NULL, // tp_str
- NULL, // tp_getattro
- NULL, // tp_setattro
- NULL, // tp_as_buffer
- Py_TPFLAGS_DEFAULT, // tp_flags
- ZoneTableAccessor_doc, // tp_doc
- NULL, // tp_traverse
- NULL, // tp_clear
- NULL, // tp_richcompare
- 0, // tp_weaklistoffset
- ZoneTableAccessor_iter, // tp_iter
- NULL, // tp_iternext
- ZoneTableAccessor_methods, // tp_methods
- NULL, // tp_members
- NULL, // tp_getset
- NULL, // tp_base
- NULL, // tp_dict
- NULL, // tp_descr_get
- NULL, // tp_descr_set
- 0, // tp_dictoffset
- ZoneTableAccessor_init, // tp_init
- NULL, // tp_alloc
- PyType_GenericNew, // tp_new
- NULL, // tp_free
- NULL, // tp_is_gc
- NULL, // tp_bases
- NULL, // tp_mro
- NULL, // tp_cache
- NULL, // tp_subclasses
- NULL, // tp_weaklist
- NULL, // tp_del
- 0 // tp_version_tag
- };
- PyObject*
- createZoneTableAccessorObject(isc::datasrc::ConstZoneTableAccessorPtr source,
- PyObject* base_obj)
- {
- s_ZoneTableAccessor* py_zt = static_cast<s_ZoneTableAccessor*>(
- zonetableaccessor_type.tp_alloc(&zonetableaccessor_type, 0));
- if (py_zt != NULL) {
- py_zt->cppobj = source;
- py_zt->base_obj = base_obj;
- if (base_obj != NULL) {
- Py_INCREF(base_obj);
- }
- }
- return (py_zt);
- }
- } // namespace python
- } // namespace datasrc
- } // namespace isc
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