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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * storage.c - équivalent Python du fichier "glibext/storage.c"
+ *
+ * Copyright (C) 2020-2025 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 "storage.h"
+
+
+#include <assert.h>
+#include <pygobject.h>
+
+
+#include <glibext/storage-int.h>
+
+
+#include "serialize.h"
+#include "../access.h"
+#include "../helpers.h"
+
+
+
+/* ------------------------ GLUE POUR CREATION DEPUIS PYTHON ------------------------ */
+
+
+CREATE_DYN_CONSTRUCTOR(object_storage, G_TYPE_OBJECT_STORAGE);
+
+/* Initialise une instance sur la base du dérivé de GObject. */
+static int py_object_storage_init(PyObject *, PyObject *, PyObject *);
+
+
+
+/* -------------------------- TAMPON POUR CODE DESASSEMBLE -------------------------- */
+
+
+/* Charge le support d'une conservation d'objets en place. */
+static PyObject *py_object_storage_load(PyObject *, PyObject *);
+
+/* Sauvegarde le support d'une conservation d'objets en place. */
+static PyObject *py_object_storage_store(PyObject *, PyObject *);
+
+/* Charge un objet à partir de données rassemblées. */
+static PyObject *py_object_storage_load_object(PyObject *, PyObject *);
+
+/* Charge un objet interne à partir de données rassemblées. */
+static PyObject *py_object_storage_unpack_object(PyObject *, PyObject *);
+
+/* Sauvegarde un object sous forme de données rassemblées. */
+static PyObject *py_object_storage_store_object(PyObject *, PyObject *);
+
+
+
+/* ---------------------------------------------------------------------------------- */
+/* GLUE POUR CREATION DEPUIS PYTHON */
+/* ---------------------------------------------------------------------------------- */
+
+
+/******************************************************************************
+* *
+* Paramètres : self = objet à initialiser (théoriquement). *
+* args = arguments fournis à l'appel. *
+* kwds = arguments de type key=val fournis. *
+* *
+* Description : Initialise une instance sur la base du dérivé de GObject. *
+* *
+* Retour : 0. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static int py_object_storage_init(PyObject *self, PyObject *args, PyObject *kwds)
+{
+ const char *type; /* Type global de conservation */
+ unsigned char version; /* Version de ce type */
+ const char *uid; /* Identifiant de distinction */
+ int ret; /* Bilan de lecture des args. */
+ GObjectStorage *storage; /* Mécanismes natifs */
+
+#define OBJECT_STORAGE_DOC \
+ "The ObjectStorage object manages the generic storage of GLib" \
+ " objects through serialization.\n" \
+ "\n" \
+ "Instances can be created using the following constructor:\n" \
+ "\n" \
+ " ObjectStorage(type, version uid)" \
+ "\n" \
+ "Where *type* is a short string describing the storage kind," \
+ " *version* provides a version control for this type and *uid* is" \
+ " an arbitrary unique identifier used for creating temporary files."
+
+ /* Récupération des paramètres */
+
+ ret = PyArg_ParseTuple(args, "sbs", &type, &version, &uid);
+ if (!ret) return -1;
+
+ /* Initialisation d'un objet GLib */
+
+ ret = forward_pygobjet_init(self);
+ if (ret == -1) return -1;
+
+ /* Eléments de base */
+
+ storage = G_OBJECT_STORAGE(pygobject_get(self));
+
+ if (!g_object_storage_create(storage, type, version, uid))
+ return -1;
+
+ return 0;
+
+}
+
+
+
+/* ---------------------------------------------------------------------------------- */
+/* TAMPON POUR CODE DESASSEMBLE */
+/* ---------------------------------------------------------------------------------- */
+
+
+/******************************************************************************
+* *
+* Paramètres : self = classe représentant une mémorisation de types. *
+* args = arguments fournis à l'appel. *
+* *
+* Description : Charge le support d'une conservation d'objets en place. *
+* *
+* Retour : Gestionnaire de conservations construit ou None si erreur. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static PyObject *py_object_storage_load(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Emplacement à retourner */
+ const char *filename; /* Fichier de source à traiter */
+ int ret; /* Bilan de lecture des args. */
+ GObjectStorage *storage; /* Mécanismes natifs */
+
+#define OBJECT_STORAGE_LOAD_METHOD PYTHON_METHOD_DEF \
+( \
+ load, "filename, /", \
+ METH_STATIC | METH_VARARGS, py_object_storage, \
+ "Construct a new storage from a filename.\n" \
+ "\n" \
+ "The *filename* argument points to the source file to" \
+ " read.\n" \
+ "\n" \
+ "The result is a new pychrysalide.glibext.ObjectStorage" \
+ " object on success, *None* otherwise." \
+)
+
+ ret = PyArg_ParseTuple(args, "s", &filename);
+ if (!ret) return NULL;
+
+ storage = g_object_storage_load(filename);
+
+ if (storage == NULL)
+ {
+ result = Py_None;
+ Py_INCREF(result);
+ }
+ else
+ {
+ result = pygobject_new(G_OBJECT(storage));
+ unref_object(storage);
+ }
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : self = classe représentant une mémorisation de types. *
+* args = arguments fournis à l'appel. *
+* *
+* Description : Sauvegarde le support d'une conservation d'objets en place. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static PyObject *py_object_storage_store(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Emplacement à retourner */
+ const char *filename; /* Fichier de destination */
+ int ret; /* Bilan de lecture des args. */
+ GObjectStorage *storage; /* Mécanismes natifs */
+ bool status; /* Bilan de l'opération */
+
+#define OBJECT_STORAGE_STORE_METHOD PYTHON_METHOD_DEF \
+( \
+ store, "$self, filename, /", \
+ METH_VARARGS, py_object_storage, \
+ "Save a storage into a file.\n" \
+ "\n" \
+ "The *filename* argument points to the destination" \
+ " file to write.\n" \
+ "\n" \
+ "The result is *True* on success, *False* otherwise." \
+)
+
+ ret = PyArg_ParseTuple(args, "s", &filename);
+ if (!ret) return NULL;
+
+ storage = G_OBJECT_STORAGE(pygobject_get(self));
+
+ status = g_object_storage_store(storage, filename);
+
+ result = status ? Py_True : Py_False;
+ Py_INCREF(result);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : self = classe représentant une mémorisation de types. *
+* args = arguments fournis à l'appel. *
+* *
+* Description : Charge un objet à partir de données rassemblées. *
+* *
+* Retour : Objet restauré en mémoire ou None en cas d'échec. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static PyObject *py_object_storage_load_object(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Bilan à retourner */
+ const char *name; /* Désignation de groupe */
+ unsigned long long pos; /* Emplacement des données */
+ int ret; /* Bilan de lecture des args. */
+ GObjectStorage *storage; /* Mécanismes natifs */
+ GSerializableObject *object; /* Objet reconstruit ou NULL */
+
+#define OBJECT_STORAGE_LOAD_OBJECT_METHOD PYTHON_METHOD_DEF \
+( \
+ load_object, "$self, name, pos, /", \
+ METH_VARARGS, py_object_storage, \
+ "Load an object from serialized data.\n" \
+ "\n" \
+ "The *name* is a string label for the group of target objects and" \
+ " *pos* is an offset into the data stream indicating the start of" \
+ " the data to unserialize.\n" \
+ "\n" \
+ "The result is a pychrysalide.analysis.storage.SerializableObject" \
+ " instancet in case of success, or *None* in case of failure." \
+)
+
+ ret = PyArg_ParseTuple(args, "sK", &name, &pos);
+ if (!ret) return NULL;
+
+ storage = G_OBJECT_STORAGE(pygobject_get(self));
+
+ object = g_object_storage_load_object(storage, name, pos);
+
+ if (object != NULL)
+ result = pygobject_new(G_OBJECT(object));
+ else
+ {
+ result = Py_None;
+ Py_INCREF(result);
+ }
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : self = classe représentant une mémorisation de types. *
+* args = arguments fournis à l'appel. *
+* *
+* Description : Charge un objet interne à partir de données rassemblées. *
+* *
+* Retour : Objet restauré en mémoire ou None en cas d'échec. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static PyObject *py_object_storage_unpack_object(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Bilan à retourner */
+ int fd; /* Flux de fonnées courant */
+ const char *name; /* Désignation de groupe */
+ int ret; /* Bilan de lecture des args. */
+ GObjectStorage *storage; /* Mécanismes natifs */
+ GSerializableObject *object; /* Objet reconstruit ou NULL */
+
+#define OBJECT_STORAGE_UNPACK_OBJECT_METHOD PYTHON_METHOD_DEF \
+( \
+ unpack_object, "$self, fd, name, /", \
+ METH_VARARGS, py_object_storage, \
+ "Load an object from a reference to serialized data.\n" \
+ "\n" \
+ "The *fd* argument is a file descriptor pointing to the data" \
+ " stream for a current object being restored. A reference to" \
+ " another object belonging to a group pointed by the string *name*" \
+ " should be available at the current read position for this data" \
+ " stream.\n" \
+ "\n" \
+ "The result is a pychrysalide.analysis.storage.SerializableObject" \
+ " instancet in case of success, or *None* in case of failure." \
+)
+
+ ret = PyArg_ParseTuple(args, "is", &fd, &name);
+ if (!ret) return NULL;
+
+ storage = G_OBJECT_STORAGE(pygobject_get(self));
+
+ object = g_object_storage_unpack_object(storage, fd, name);
+
+ if (object != NULL)
+ result = pygobject_new(G_OBJECT(object));
+ else
+ {
+ result = Py_None;
+ Py_INCREF(result);
+ }
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : self = classe représentant une mémorisation de types. *
+* args = arguments fournis à l'appel. *
+* *
+* Description : Sauvegarde un object sous forme de données rassemblées. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static PyObject *py_object_storage_store_object(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Emplacement à retourner */
+ const char *name; /* Désignation de groupe */
+ GSerializableObject *object; /* Objet à traiter */
+ int ret; /* Bilan de lecture des args. */
+ GObjectStorage *storage; /* Mécanismes natifs */
+ off64_t pos; /* Emplacement d'enregistrement*/
+ bool status; /* Bilan de l'opération */
+
+#define OBJECT_STORAGE_STORE_OBJECT_METHOD PYTHON_METHOD_DEF \
+( \
+ store_object, "$self, name, object, /", \
+ METH_VARARGS, py_object_storage, \
+ "Save an object as serialized data.\n" \
+ "\n" \
+ "The *name* is a string label for the group of target objects" \
+ " and the processed *object* has to be a" \
+ " pychrysalide.analysis.storage.SerializableObject instance.\n" \
+ "\n" \
+ "The result is the position of the data for stored object," \
+ " provided as an integer offset, in case of success or *None*" \
+ " in case of failure." \
+)
+
+ ret = PyArg_ParseTuple(args, "sO&", &name, convert_to_serializable_object, &object);
+ if (!ret) return NULL;
+
+ storage = G_OBJECT_STORAGE(pygobject_get(self));
+
+ status = g_object_storage_store_object(storage, name, object, &pos);
+
+ if (status)
+ result = PyLong_FromUnsignedLongLong((unsigned long long)pos);
+ else
+ {
+ result = Py_None;
+ 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_object_storage_type(void)
+{
+ static PyMethodDef py_object_storage_methods[] = {
+ OBJECT_STORAGE_LOAD_METHOD,
+ OBJECT_STORAGE_STORE_METHOD,
+ OBJECT_STORAGE_LOAD_OBJECT_METHOD,
+ OBJECT_STORAGE_UNPACK_OBJECT_METHOD,
+ OBJECT_STORAGE_STORE_OBJECT_METHOD,
+ { NULL }
+ };
+
+ static PyGetSetDef py_object_storage_getseters[] = {
+ { NULL }
+ };
+
+ static PyTypeObject py_object_storage_type = {
+
+ PyVarObject_HEAD_INIT(NULL, 0)
+
+ .tp_name = "pychrysalide.glibext.ObjectStorage",
+ .tp_basicsize = sizeof(PyGObject),
+
+ .tp_flags = Py_TPFLAGS_DEFAULT,
+
+ .tp_doc = OBJECT_STORAGE_DOC,
+
+ .tp_methods = py_object_storage_methods,
+ .tp_getset = py_object_storage_getseters,
+
+ .tp_init = py_object_storage_init,
+ .tp_new = py_object_storage_new
+
+ };
+
+ return &py_object_storage_type;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : module = module dont la définition est à compléter. *
+* *
+* Description : Prend en charge l'objet 'pychrysalide.glibext.ObjectStorage'.*
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool ensure_python_object_storage_is_registered(void)
+{
+ PyTypeObject *type; /* Type Python 'ObjectStorage' */
+ PyObject *module; /* Module à recompléter */
+ PyObject *dict; /* Dictionnaire du module */
+
+ type = get_python_object_storage_type();
+
+ if (!PyType_HasFeature(type, Py_TPFLAGS_READY))
+ {
+ module = get_access_to_python_module("pychrysalide.glibext");
+
+ dict = PyModule_GetDict(module);
+
+ if (!register_class_for_pygobject(dict, G_TYPE_OBJECT_STORAGE, type))
+ 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 conservateur d'objets. *
+* *
+* Retour : Bilan de l'opération, voire indications supplémentaires. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+int convert_to_object_storage(PyObject *arg, void *dst)
+{
+ int result; /* Bilan à retourner */
+
+ result = PyObject_IsInstance(arg, (PyObject *)get_python_object_storage_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 object storage");
+ break;
+
+ case 1:
+ *((GObjectStorage **)dst) = G_OBJECT_STORAGE(pygobject_get(arg));
+ break;
+
+ default:
+ assert(false);
+ break;
+
+ }
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : arg = argument quelconque à tenter de convertir. *
+* dst = destination des valeurs récupérées en cas de succès. *
+* *
+* Description : Tente de convertir en conservateur d'objets ou NULL. *
+* *
+* Retour : Bilan de l'opération, voire indications supplémentaires. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+int convert_to_object_storage_or_none(PyObject *arg, void *dst)
+{
+ int result; /* Bilan à retourner */
+
+ if (arg == Py_None)
+ {
+ *((GTypeMemory **)dst) = NULL;
+ result = 1;
+ }
+
+ else
+ result = convert_to_object_storage(arg, dst);
+
+ return result;
+
+}