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/* Chrysalide - Outil d'analyse de fichiers binaires
* bitap.c - équivalent Python du fichier "analysis/scan/patterns/backends/bitap.c"
*
* Copyright (C) 2022 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 "bitap.h"
#include <pygobject.h>
#include <i18n.h>
#include <analysis/scan/patterns/backends/bitap-int.h>
#include "../backend.h"
#include "../../../../access.h"
#include "../../../../helpers.h"
CREATE_DYN_CONSTRUCTOR(bitap_backend, G_TYPE_BITAP_BACKEND);
/* Initialise une instance sur la base du dérivé de GObject. */
static int py_bitap_backend_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_bitap_backend_init(PyObject *self, PyObject *args, PyObject *kwds)
{
int ret; /* Bilan de lecture des args. */
#define BITAP_BACKEND_DOC \
"A *BitapBackend* class provide an implementation of the Bitap" \
" search algorithm." \
"\n" \
"Instances can be created using the following constructor:\n" \
"\n" \
" BitapBackend()" \
"\n" \
"See the relative white paper for more information:" \
" https://en.wikipedia.org/wiki/Bitap_algorithm"
/* Initialisation d'un objet GLib */
ret = forward_pygobjet_init(self);
if (ret == -1) 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_bitap_backend_type(void)
{
static PyMethodDef py_bitap_backend_methods[] = {
{ NULL }
};
static PyGetSetDef py_bitap_backend_getseters[] = {
{ NULL }
};
static PyTypeObject py_bitap_backend_type = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "pychrysalide.analysis.scan.patterns.backends.BitapBackend",
.tp_basicsize = sizeof(PyGObject),
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_doc = BITAP_BACKEND_DOC,
.tp_methods = py_bitap_backend_methods,
.tp_getset = py_bitap_backend_getseters,
.tp_init = py_bitap_backend_init,
.tp_new = py_bitap_backend_new,
};
return &py_bitap_backend_type;
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Prend en charge l'objet 'pychrysalide....BitapBackend'. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool ensure_python_bitap_backend_is_registered(void)
{
PyTypeObject *type; /* Type Python 'BitapBackend'*/
PyObject *module; /* Module à recompléter */
PyObject *dict; /* Dictionnaire du module */
type = get_python_bitap_backend_type();
if (!PyType_HasFeature(type, Py_TPFLAGS_READY))
{
module = get_access_to_python_module("pychrysalide.analysis.scan.patterns.backends");
dict = PyModule_GetDict(module);
if (!ensure_python_engine_backend_is_registered())
return false;
if (!register_class_for_pygobject(dict, G_TYPE_BITAP_BACKEND, type, &PyGObject_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 méthode de recherche BITAP. *
* *
* Retour : Bilan de l'opération, voire indications supplémentaires. *
* *
* Remarques : - *
* *
******************************************************************************/
int convert_to_bitap_backend(PyObject *arg, void *dst)
{
int result; /* Bilan à retourner */
result = PyObject_IsInstance(arg, (PyObject *)get_python_bitap_backend_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 Bitap backend");
break;
case 1:
*((GBitapBackend **)dst) = G_BITAP_BACKEND(pygobject_get(arg));
break;
default:
assert(false);
break;
}
return result;
}
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