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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * serialize.c - équivalent Python du fichier "analysis/storage/serialize.h"
+ *
+ * Copyright (C) 2020 Cyrille Bagard
+ *
+ * This file is part of Chrysalide.
+ *
+ * Chrysalide is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chrysalide is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include "serialize.h"
+
+
+#include <pygobject.h>
+
+
+#include <analysis/storage/serialize-int.h>
+
+
+#include "storage.h"
+#include "../../access.h"
+#include "../../helpers.h"
+#include "../../common/packed.h"
+
+
+
+/* ------------------------ GLUE POUR CREATION DEPUIS PYTHON ------------------------ */
+
+
+/* Procède à l'initialisation de l'interface de génération. */
+static void py_serializable_object_interface_init(GSerializableObjectIface *, gpointer *);
+
+/* Charge un objet depuis une mémoire tampon. */
+static bool py_serializable_object_load_wrapper(GSerializableObject *, GObjectStorage *, packed_buffer_t *);
+
+/* Sauvegarde un objet dans une mémoire tampon. */
+static bool py_serializable_object_store_wrapper(const GSerializableObject *, GObjectStorage *, packed_buffer_t *);
+
+
+
+/* ------------------------- CONNEXION AVEC L'API DE PYTHON ------------------------- */
+
+
+/* Charge un objet depuis une mémoire tampon. */
+static bool py_serializable_object_load(PyObject *, PyObject *);
+
+/* Sauvegarde un objet dans une mémoire tampon. */
+static bool py_serializable_object_store(PyObject *, PyObject *);
+
+
+
+/* ---------------------------------------------------------------------------------- */
+/* GLUE POUR CREATION DEPUIS PYTHON */
+/* ---------------------------------------------------------------------------------- */
+
+
+/******************************************************************************
+* *
+* Paramètres : iface = interface GLib à initialiser. *
+* unused = adresse non utilisée ici. *
+* *
+* Description : Procède à l'initialisation de l'interface de génération. *
+* *
+* Retour : - *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static void py_serializable_object_interface_init(GSerializableObjectIface *iface, gpointer *unused)
+{
+
+#define SERIALIZABLE_OBJECT_DOC \
+ "SerializableObject defines an interface used to store and load" \
+ " objects to and from a data buffer.\n" \
+ "\n" \
+ "A typical class declaration for a new implementation looks like:\n" \
+ "\n" \
+ " class NewImplem(GObject.Object, SerializableObject):\n" \
+ " ...\n" \
+ "\n" \
+ "The following methods have to be defined for new implementations:\n" \
+ "* pychrysalide.analysis.storage.SerializableObject._load();\n" \
+ "* pychrysalide.analysis.storage.SerializableObject._store();\n"
+
+ iface->load = py_serializable_object_load_wrapper;
+ iface->store = py_serializable_object_store_wrapper;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : object = instruction d'assemblage à consulter. *
+* storage = conservateur de données à manipuler ou NULL. *
+* pbuf = zone tampon à remplir. *
+* *
+* Description : Charge un objet depuis une mémoire tampon. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static bool py_serializable_object_load_wrapper(GSerializableObject *object, GObjectStorage *storage, packed_buffer_t *pbuf)
+{
+ bool result; /* Bilan à retourner */
+ PyGILState_STATE gstate; /* Sauvegarde d'environnement */
+ PyObject *storage_obj; /* Objet Python à emmployer */
+ PyObject *args; /* Arguments pour l'appel */
+ PyObject *pyobj; /* Objet Python concerné */
+ PyObject *pyret; /* Bilan de consultation */
+
+#define SERIALIZABLE_OBJECT_LOAD_WRAPPER PYTHON_WRAPPER_DEF \
+( \
+ _load, "$self, storage, pbuf, /", \
+ METH_VARARGS, \
+ "Abstract method used to load an object definition from buffered data.\n" \
+ "\n" \
+ "The *storage* is a pychrysalide.analysis.storage.ObjectStorage instance" \
+ " provided to store inner objects, if relevant, or None. The *pbuf*" \
+ " argument points to a pychrysalide.common.PackedBuffer object containing" \
+ " the data to process.\n" \
+ "\n" \
+ "The result is a boolean indicating the status of the operation." \
+)
+
+ result = false;
+
+ gstate = PyGILState_Ensure();
+
+ pyobj = pygobject_new(G_OBJECT(object));
+
+ if (has_python_method(pyobj, "_load"))
+ {
+ if (storage == NULL)
+ {
+ storage_obj = Py_None;
+ Py_INCREF(storage_obj);
+ }
+ else
+ storage_obj = pygobject_new(G_OBJECT(storage));
+
+ args = PyTuple_New(2);
+ PyTuple_SetItem(args, 0, storage_obj);
+ PyTuple_SetItem(args, 1, build_from_internal_packed_buffer(pbuf));
+
+ pyret = run_python_method(pyobj, "_load", args);
+
+ result = (pyret == Py_True ? true : false);
+
+ Py_XDECREF(pyret);
+
+ Py_DECREF(args);
+
+ }
+
+ Py_DECREF(pyobj);
+
+ PyGILState_Release(gstate);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : object = instruction d'assemblage à consulter. *
+* storage = conservateur de données à manipuler ou NULL. *
+* pbuf = zone tampon à remplir. *
+* *
+* Description : Sauvegarde un objet dans une mémoire tampon. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static bool py_serializable_object_store_wrapper(const GSerializableObject *object, GObjectStorage *storage, packed_buffer_t *pbuf)
+{
+ bool result; /* Bilan à retourner */
+ PyGILState_STATE gstate; /* Sauvegarde d'environnement */
+ PyObject *storage_obj; /* Objet Python à emmployer */
+ PyObject *args; /* Arguments pour l'appel */
+ PyObject *pyobj; /* Objet Python concerné */
+ PyObject *pyret; /* Bilan de consultation */
+
+#define SERIALIZABLE_OBJECT_STORE_WRAPPER PYTHON_WRAPPER_DEF \
+( \
+ _store, "$self, storage, pbuf, /", \
+ METH_VARARGS, \
+ "Abstract method used to store an object definition into buffered data.\n" \
+ "\n" \
+ "The *storage* is a pychrysalide.analysis.storage.ObjectStorage instance" \
+ " provided to store inner objects, if relevant, or None. The *pbuf*" \
+ " argument points to a pychrysalide.common.PackedBuffer object containing" \
+ " the data to process.\n" \
+ "\n" \
+ "The result is a boolean indicating the status of the operation." \
+)
+
+ result = false;
+
+ gstate = PyGILState_Ensure();
+
+ pyobj = pygobject_new(G_OBJECT(object));
+
+ if (has_python_method(pyobj, "_store"))
+ {
+ if (storage == NULL)
+ {
+ storage_obj = Py_None;
+ Py_INCREF(storage_obj);
+ }
+ else
+ storage_obj = pygobject_new(G_OBJECT(storage));
+
+ args = PyTuple_New(2);
+ PyTuple_SetItem(args, 0, storage_obj);
+ PyTuple_SetItem(args, 1, build_from_internal_packed_buffer(pbuf));
+
+ pyret = run_python_method(pyobj, "_store", args);
+
+ result = (pyret == Py_True ? true : false);
+
+ Py_XDECREF(pyret);
+
+ Py_DECREF(args);
+
+ }
+
+ Py_DECREF(pyobj);
+
+ PyGILState_Release(gstate);
+
+ return result;
+
+}
+
+
+
+/* ---------------------------------------------------------------------------------- */
+/* CONNEXION AVEC L'API DE PYTHON */
+/* ---------------------------------------------------------------------------------- */
+
+
+/******************************************************************************
+* *
+* Paramètres : self = classe représentant un générateur à manipuler. *
+* args = arguments fournis à l'appel. *
+* *
+* Description : Charge un objet depuis une mémoire tampon. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static bool py_serializable_object_load(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Bilan à retourner */
+ GObjectStorage *storage; /* Conservateur à manipuler */
+ packed_buffer_t *pbuf; /* Tampon de données à employer*/
+ int ret; /* Bilan de lecture des args. */
+ GSerializableObject *object; /* Version native */
+ bool status; /* Bilan de l'opération */
+
+#define SERIALIZABLE_OBJECT_LOAD_METHOD PYTHON_METHOD_DEF \
+( \
+ load, "$self, storage, pbuf, /", \
+ METH_VARARGS, py_serializable_object, \
+ "Load an object definition from buffered data.\n" \
+ "\n" \
+ "The *storage* is a pychrysalide.analysis.storage.ObjectStorage instance" \
+ " provided to store inner objects, if relevant, or None. The *pbuf*" \
+ " argument points to a pychrysalide.common.PackedBuffer object containing" \
+ " the data to process.\n" \
+ "\n" \
+ "The result is a boolean indicating the status of the operation." \
+)
+
+ ret = PyArg_ParseTuple(args, "O&O&", convert_to_object_storage_or_none, &storage,
+ convert_to_packed_buffer, &pbuf);
+ if (!ret) return NULL;
+
+ object = G_SERIALIZABLE_OBJECT(pygobject_get(self));
+
+ status = g_serializable_object_load(object, storage, pbuf);
+
+ result = status ? Py_True : Py_False;
+ Py_INCREF(result);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : self = classe représentant un générateur à manipuler. *
+* args = arguments fournis à l'appel. *
+* *
+* Description : Sauvegarde un objet dans une mémoire tampon. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static bool py_serializable_object_store(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Bilan à retourner */
+ GObjectStorage *storage; /* Conservateur à manipuler */
+ packed_buffer_t *pbuf; /* Tampon de données à employer*/
+ int ret; /* Bilan de lecture des args. */
+ GSerializableObject *object; /* Version native */
+ bool status; /* Bilan de l'opération */
+
+#define SERIALIZABLE_OBJECT_STORE_METHOD PYTHON_METHOD_DEF \
+( \
+ store, "$self, storage, pbuf, /", \
+ METH_VARARGS, py_serializable_object, \
+ "Store an object definition into buffered data.\n" \
+ "\n" \
+ "The *storage* is a pychrysalide.analysis.storage.ObjectStorage instance" \
+ " provided to store inner objects, if relevant, or None. The *pbuf*" \
+ " argument points to a pychrysalide.common.PackedBuffer object containing" \
+ " the data to process.\n" \
+ "\n" \
+ "The result is a boolean indicating the status of the operation." \
+)
+
+ ret = PyArg_ParseTuple(args, "O&O&", convert_to_object_storage_or_none, &storage,
+ convert_to_packed_buffer, &pbuf);
+ if (!ret) return NULL;
+
+ object = G_SERIALIZABLE_OBJECT(pygobject_get(self));
+
+ status = g_serializable_object_store(object, storage, pbuf);
+
+ result = status ? Py_True : Py_False;
+ Py_INCREF(result);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : - *
+* *
+* Description : Fournit un accès à une définition de type à diffuser. *
+* *
+* Retour : Définition d'objet pour Python. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+PyTypeObject *get_python_serializable_object_type(void)
+{
+ static PyMethodDef py_serializable_object_methods[] = {
+ SERIALIZABLE_OBJECT_LOAD_WRAPPER,
+ SERIALIZABLE_OBJECT_STORE_WRAPPER,
+ SERIALIZABLE_OBJECT_LOAD_METHOD,
+ SERIALIZABLE_OBJECT_STORE_METHOD,
+ { NULL }
+ };
+
+ static PyGetSetDef py_serializable_object_getseters[] = {
+ { NULL }
+ };
+
+ static PyTypeObject py_serializable_object_type = {
+
+ PyVarObject_HEAD_INIT(NULL, 0)
+
+ .tp_name = "pychrysalide.analysis.storage.SerializableObject",
+ .tp_basicsize = sizeof(PyObject),
+
+ .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
+
+ .tp_doc = SERIALIZABLE_OBJECT_DOC,
+
+ .tp_methods = py_serializable_object_methods,
+ .tp_getset = py_serializable_object_getseters,
+
+ };
+
+ return &py_serializable_object_type;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : module = module dont la définition est à compléter. *
+* *
+* Description : Prend en charge l'objet 'pychrysalide....SerializableObject'.*
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool ensure_python_serializable_object_is_registered(void)
+{
+ PyTypeObject *type; /* Type 'SerializableObject' */
+ PyObject *module; /* Module à recompléter */
+ PyObject *dict; /* Dictionnaire du module */
+
+ static GInterfaceInfo info = { /* Paramètres d'inscription */
+
+ .interface_init = (GInterfaceInitFunc)py_serializable_object_interface_init,
+ .interface_finalize = NULL,
+ .interface_data = NULL,
+
+ };
+
+ type = get_python_serializable_object_type();
+
+ if (!PyType_HasFeature(type, Py_TPFLAGS_READY))
+ {
+ module = get_access_to_python_module("pychrysalide.analysis.storage");
+
+ dict = PyModule_GetDict(module);
+
+ if (!register_interface_for_pygobject(dict, G_TYPE_SERIALIZABLE_OBJECT, type, &info))
+ return false;
+
+ }
+
+ return true;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : arg = argument quelconque à tenter de convertir. *
+* dst = destination des valeurs récupérées en cas de succès. *
+* *
+* Description : Tente de convertir en objet adapté à une mise en cache. *
+* *
+* Retour : Bilan de l'opération, voire indications supplémentaires. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+int convert_to_serializable_object(PyObject *arg, void *dst)
+{
+ int result; /* Bilan à retourner */
+
+ result = PyObject_IsInstance(arg, (PyObject *)get_python_serializable_object_type());
+
+ switch (result)
+ {
+ case -1:
+ /* L'exception est déjà fixée par Python */
+ result = 0;
+ break;
+
+ case 0:
+ PyErr_SetString(PyExc_TypeError, "unable to convert the provided argument to serializable object");
+ break;
+
+ case 1:
+ *((GSerializableObject **)dst) = G_SERIALIZABLE_OBJECT(pygobject_get(arg));
+ break;
+
+ default:
+ assert(false);
+ break;
+
+ }
+
+ return result;
+
+}
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