/* Chrysalide - Outil d'analyse de fichiers binaires * trigger.c - équivalent Python du fichier "plugins/kaitai/rost/trigger.c" * * Copyright (C) 2023 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 "trigger.h" #include #include #include #include #include #include #include "../parsers/struct.h" #include "../../parsers/struct.h" #include "../../rost/trigger-int.h" CREATE_DYN_CONSTRUCTOR(kaitai_trigger, G_TYPE_KAITAI_TRIGGER); /* Initialise une instance sur la base du dérivé de GObject. */ static int py_kaitai_trigger_init(PyObject *, PyObject *, PyObject *); /****************************************************************************** * * * 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_kaitai_trigger_init(PyObject *self, PyObject *args, PyObject *kwds) { GKaitaiStruct *kstruct; /* Définition Kaitai en place */ int ret; /* Bilan de lecture des args. */ GKaitaiTrigger *trigger; /* Création GLib à transmettre */ #define KAITAI_TRIGGER_DOC \ "The KaitaiTrigger object store an access to a loaded Kaitai definition" \ " creates as many as required instances from it when ROST filters contents" \ " with the help of the Kaitai module.\n" \ "\n" \ "Instances can be created using following constructor:\n" \ "\n" \ " KaitaiTrigger(kstruct)" \ "\n" \ "Where *kstruct* is a pychrysalide.plugins.kaitai.parsers.KaitaiStruct" \ " instance loaded with a valid Kaitai definition." /* Récupération des paramètres */ ret = PyArg_ParseTuple(args, "O&", convert_to_kaitai_structure, &kstruct); if (!ret) return -1; /* Initialisation d'un objet GLib */ ret = forward_pygobjet_init(self); if (ret == -1) return -1; /* Eléments de base */ trigger = G_KAITAI_TRIGGER(pygobject_get(self)); if (!g_kaitai_trigger_create(trigger, kstruct)) { PyErr_SetString(PyExc_ValueError, _("Unable to create Kaitai stream.")); return -1; } return 0; } /****************************************************************************** * * * Paramètres : - * * * * Description : Fournit un accès à une définition de type à diffuser. * * * * Retour : Définition d'objet pour Python. * * * * Remarques : - * * * ******************************************************************************/ PyTypeObject *get_python_kaitai_trigger_type(void) { static PyMethodDef py_kaitai_trigger_methods[] = { { NULL } }; static PyGetSetDef py_kaitai_trigger_getseters[] = { { NULL } }; static PyTypeObject py_kaitai_trigger_type = { PyVarObject_HEAD_INIT(NULL, 0) .tp_name = "pychrysalide.plugins.kaitai.rost.KaitaiTrigger", .tp_basicsize = sizeof(PyGObject), .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, .tp_doc = KAITAI_TRIGGER_DOC, .tp_methods = py_kaitai_trigger_methods, .tp_getset = py_kaitai_trigger_getseters, .tp_init = py_kaitai_trigger_init, .tp_new = py_kaitai_trigger_new, }; return &py_kaitai_trigger_type; } /****************************************************************************** * * * Paramètres : - * * * * Description : Prend en charge l'objet 'pychrysalide....rost.KaitaiTrigger. * * * * Retour : Bilan de l'opération. * * * * Remarques : - * * * ******************************************************************************/ bool ensure_python_kaitai_trigger_is_registered(void) { PyTypeObject *type; /* Type Python 'RecordEmpty' */ PyObject *module; /* Module à recompléter */ PyObject *dict; /* Dictionnaire du module */ type = get_python_kaitai_trigger_type(); if (!PyType_HasFeature(type, Py_TPFLAGS_READY)) { module = get_access_to_python_module("pychrysalide.plugins.kaitai.rost"); dict = PyModule_GetDict(module); if (!ensure_python_scan_registered_item_is_registered()) return false; if (!register_class_for_pygobject(dict, G_TYPE_KAITAI_TRIGGER, 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 accès à une définition Kaitai. * * * * Retour : Bilan de l'opération, voire indications supplémentaires. * * * * Remarques : - * * * ******************************************************************************/ int convert_to_kaitai_trigger(PyObject *arg, void *dst) { int result; /* Bilan à retourner */ result = PyObject_IsInstance(arg, (PyObject *)get_python_kaitai_trigger_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 Kaitai trigger"); break; case 1: *((GKaitaiTrigger **)dst) = G_KAITAI_TRIGGER(pygobject_get(arg)); break; default: assert(false); break; } return result; }