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author | Cyrille Bagard <nocbos@gmail.com> | 2020-07-07 21:52:13 (GMT) |
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committer | Cyrille Bagard <nocbos@gmail.com> | 2020-07-07 21:52:13 (GMT) |
commit | 6ea1b9a8550adf84cde510c2d4446c5120c4d065 (patch) | |
tree | f6b5838203e87be9dce04ae0771cb14e5bfdfb87 /plugins/pychrysalide/analysis/storage/container.c | |
parent | d3c1294c05579db9dd5a1436883fe3fb78a052be (diff) |
Saved the first steps toward a new serialization system.
Diffstat (limited to 'plugins/pychrysalide/analysis/storage/container.c')
-rw-r--r-- | plugins/pychrysalide/analysis/storage/container.c | 455 |
1 files changed, 455 insertions, 0 deletions
diff --git a/plugins/pychrysalide/analysis/storage/container.c b/plugins/pychrysalide/analysis/storage/container.c new file mode 100644 index 0000000..d32c689 --- /dev/null +++ b/plugins/pychrysalide/analysis/storage/container.c @@ -0,0 +1,455 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * container.c - équivalent Python du fichier "analysis/storage/container.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 "container.h" + + +#include <pygobject.h> + + +#include <analysis/storage/container-int.h> + + +#include "../../access.h" +#include "../../helpers.h" + + + +/* ------------------------ GLUE POUR CREATION DEPUIS PYTHON ------------------------ */ + + +/* Procède à l'initialisation de l'interface de génération. */ +static void py_cache_container_interface_init(GCacheContainerIface *, gpointer *); + +/* Contrôle l'accès au contenu d'un conteneur. */ +static void py_cache_container_lock_unlock_wrapper(GCacheContainer *, bool); + +/* Indique si le contenu d'un conteneur peut être mis en cache. */ +static bool py_cache_container_can_store_wrapper(GCacheContainer *); + + + +/* ------------------------- CONNEXION AVEC L'API DE PYTHON ------------------------- */ + + +/* Contrôle l'accès au contenu d'un conteneur. */ +static bool py_cache_container_lock_unlock(PyObject *, PyObject *); + +/* Indique si le contenu d'un conteneur peut être mis en cache. */ +static bool py_cache_container_can_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_cache_container_interface_init(GCacheContainerIface *iface, gpointer *unused) +{ + +#define CACHE_CONTAINER_DOC \ + "CacheContainer defines an interface for objects with content allowed" \ + " to get cached.\n" \ + "\n" \ + "A typical class declaration for a new implementation looks like:\n" \ + "\n" \ + " class NewImplem(GObject.Object, CacheContainer):\n" \ + " ...\n" \ + "\n" \ + "The following methods have to be defined for new implementations:\n" \ + "* pychrysalide.analysis.storage.CacheContainer._lock_unlock();\n" \ + "* pychrysalide.analysis.storage.CacheContainer._can_store();\n" + + iface->lock_unlock = py_cache_container_lock_unlock_wrapper; + iface->can_store = py_cache_container_can_store_wrapper; + +} + + +/****************************************************************************** +* * +* Paramètres : container = conteneur à manipuler. * +* lock = indique une demande de verrou. * +* * +* Description : Contrôle l'accès au contenu d'un conteneur. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void py_cache_container_lock_unlock_wrapper(GCacheContainer *container, bool lock) +{ + PyGILState_STATE gstate; /* Sauvegarde d'environnement */ + PyObject *lock_obj; /* Objet Python à emmployer */ + PyObject *args; /* Arguments pour l'appel */ + PyObject *pyobj; /* Objet Python concerné */ + PyObject *pyret; /* Bilan de consultation */ + +#define CACHE_CONTAINER_LOCK_UNLOCK_WRAPPER PYTHON_WRAPPER_DEF \ +( \ + _lock_unlock, "$self, lock, /", \ + METH_VARARGS, \ + "Abstract method used to lock or to unlock access to cache container" \ + " internals.\n" \ + "\n" \ + "The content of such a cache can then be accessed safely, without the" \ + " fear of race condition while processing.\n" \ + "\n" \ + "The *lock* argument is a boolean value indicating the state to" \ + " achieve." \ +) + + gstate = PyGILState_Ensure(); + + pyobj = pygobject_new(G_OBJECT(container)); + + if (has_python_method(pyobj, "_lock_unlock")) + { + lock_obj = lock ? Py_True : Py_False; + Py_INCREF(lock_obj); + + args = PyTuple_New(1); + PyTuple_SetItem(args, 0, lock_obj); + + pyret = run_python_method(pyobj, "_lock_unlock", args); + + Py_XDECREF(pyret); + + Py_DECREF(args); + + } + + Py_DECREF(pyobj); + + PyGILState_Release(gstate); + +} + + +/****************************************************************************** +* * +* Paramètres : container = conteneur à consulter. * +* * +* Description : Indique si le contenu d'un conteneur peut être mis en cache. * +* * +* Retour : Bilan de la consultation. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_cache_container_can_store_wrapper(GCacheContainer *container) +{ + bool result; /* Bilan à retourner */ + PyGILState_STATE gstate; /* Sauvegarde d'environnement */ + PyObject *pyobj; /* Objet Python concerné */ + PyObject *pyret; /* Bilan de consultation */ + +#define CACHE_CONTAINER_CAN_STORE_WRAPPER PYTHON_WRAPPER_DEF \ +( \ + _can_store, "$self, /", \ + METH_NOARGS, \ + "Abstract method used to define if a container can cache its" \ + " content.\n" \ + "\n" \ + "This kind of operation is not wished if the content is currently" \ + " in use.\n" \ + "\n" \ + "The result is a boolean indicating the capacity of safely" \ + " building a cache." \ +) + + result = false; + + gstate = PyGILState_Ensure(); + + pyobj = pygobject_new(G_OBJECT(container)); + + if (has_python_method(pyobj, "_can_store")) + { + pyret = run_python_method(pyobj, "_can_store", NULL); + + result = (pyret == Py_True ? true : false); + + Py_XDECREF(pyret); + + } + + 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 : Contrôle l'accès au contenu d'un conteneur. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_cache_container_lock_unlock(PyObject *self, PyObject *args) +{ + PyObject *result; /* Bilan à retourner */ + int lock; /* Type de demande de verrou */ + int ret; /* Bilan de lecture des args. */ + GCacheContainer *object; /* Version native */ + +#define CACHE_CONTAINER_LOCK_UNLOCK_METHOD PYTHON_METHOD_DEF \ +( \ + lock_unlock, "$self, lock, /", \ + METH_VARARGS, py_cache_container, \ + "Lock or unlock access to cache container internals.\n" \ + "\n" \ + "The content of such a cache can then be accessed safely, without the" \ + " fear of race condition while processing.\n" \ + "\n" \ + "The *lock* argument is a boolean value indicating the state to" \ + " achieve." \ +) + + ret = PyArg_ParseTuple(args, "p", &lock); + if (!ret) return NULL; + + object = G_CACHE_CONTAINER(pygobject_get(self)); + + g_cache_container_lock_unlock(object, lock); + + result = Py_None; + Py_INCREF(result); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : self = classe représentant un générateur à manipuler. * +* args = arguments fournis à l'appel. * +* * +* Description : Indique si le contenu d'un conteneur peut être mis en cache. * +* * +* Retour : Bilan de la consultation. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_cache_container_can_store(PyObject *self, PyObject *args) +{ + PyObject *result; /* Bilan à retourner */ + GCacheContainer *object; /* Version native */ + bool status; /* Bilan de l'opération */ + +#define CACHE_CONTAINER_CAN_STORE_METHOD PYTHON_METHOD_DEF \ +( \ + can_store, "$self, /", \ + METH_NOARGS, py_cache_container, \ + "Define if a container can cache its content.\n" \ + "\n" \ + "This kind of operation is not wished if the content is currently" \ + " in use.\n" \ + "\n" \ + "The result is a boolean indicating the capacity of safely" \ + " building a cache." \ +) + + object = G_CACHE_CONTAINER(pygobject_get(self)); + + status = g_cache_container_can_store(object); + + 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_cache_container_type(void) +{ + static PyMethodDef py_cache_container_methods[] = { + CACHE_CONTAINER_LOCK_UNLOCK_WRAPPER, + CACHE_CONTAINER_CAN_STORE_WRAPPER, + CACHE_CONTAINER_LOCK_UNLOCK_METHOD, + CACHE_CONTAINER_CAN_STORE_METHOD, + { NULL } + }; + + static PyGetSetDef py_cache_container_getseters[] = { + { NULL } + }; + + static PyTypeObject py_cache_container_type = { + + PyVarObject_HEAD_INIT(NULL, 0) + + .tp_name = "pychrysalide.analysis.storage.CacheContainer", + .tp_basicsize = sizeof(PyObject), + + .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, + + .tp_doc = CACHE_CONTAINER_DOC, + + .tp_methods = py_cache_container_methods, + .tp_getset = py_cache_container_getseters, + + }; + + return &py_cache_container_type; + +} + + +/****************************************************************************** +* * +* Paramètres : module = module dont la définition est à compléter. * +* * +* Description : Prend en charge l'objet 'pychrysalide....CacheContainer'. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool ensure_python_cache_container_is_registered(void) +{ + PyTypeObject *type; /* Type Python 'CacheContainer'*/ + PyObject *module; /* Module à recompléter */ + PyObject *dict; /* Dictionnaire du module */ + + static GInterfaceInfo info = { /* Paramètres d'inscription */ + + .interface_init = (GInterfaceInitFunc)py_cache_container_interface_init, + .interface_finalize = NULL, + .interface_data = NULL, + + }; + + type = get_python_cache_container_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_2(dict, G_TYPE_CACHE_CONTAINER, 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 conteneur d'objets entreposables. * +* * +* Retour : Bilan de l'opération, voire indications supplémentaires. * +* * +* Remarques : - * +* * +******************************************************************************/ + +int convert_to_cache_container(PyObject *arg, void *dst) +{ + int result; /* Bilan à retourner */ + + result = PyObject_IsInstance(arg, (PyObject *)get_python_cache_container_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 cache container"); + break; + + case 1: + *((GCacheContainer **)dst) = G_CACHE_CONTAINER(pygobject_get(arg)); + break; + + default: + assert(false); + break; + + } + + return result; + +} |