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/* Chrysalide - Outil d'analyse de fichiers binaires
* constants.c - ajout des constantes de base pour les expressions
*
* 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 "constants.h"
#include <analysis/scan/exprs/literal.h>
#include "../../../helpers.h"
/******************************************************************************
* *
* Paramètres : type = type dont le dictionnaire est à compléter. *
* *
* Description : Définit les constantes relatives aux expressions de scan. *
* *
* Retour : true en cas de succès de l'opération, false sinon. *
* *
* Remarques : - *
* *
******************************************************************************/
bool define_literal_expression_value_type_constants(PyTypeObject *type)
{
bool result; /* Bilan à retourner */
PyObject *values; /* Groupe de valeurs à établir */
values = PyDict_New();
result = add_const_to_group(values, "LVT_BOOLEAN", LVT_BOOLEAN);
if (result) result = add_const_to_group(values, "SIGNED_INTEGER", LVT_SIGNED_INTEGER);
if (result) result = add_const_to_group(values, "UNSIGNED_INTEGER", LVT_UNSIGNED_INTEGER);
if (result) result = add_const_to_group(values, "STRING", LVT_STRING);
if (!result)
{
Py_DECREF(values);
goto exit;
}
result = attach_constants_group_to_type(type, false, "LiteralValueType", values,
"Type of value carried by a literal scan expression.");
exit:
return result;
}
/******************************************************************************
* *
* Paramètres : arg = argument quelconque à tenter de convertir. *
* dst = destination des valeurs récupérées en cas de succès. *
* *
* Description : Tente de convertir en constante LiteralValueType. *
* *
* Retour : Bilan de l'opération, voire indications supplémentaires. *
* *
* Remarques : - *
* *
******************************************************************************/
int convert_to_literal_expression_value_type(PyObject *arg, void *dst)
{
int result; /* Bilan à retourner */
unsigned long value; /* Valeur transcrite */
result = PyObject_IsInstance(arg, (PyObject *)&PyLong_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 LiteralValueType");
break;
case 1:
value = PyLong_AsUnsignedLong(arg);
if (value > LVT_REG_EXPR)
{
PyErr_SetString(PyExc_TypeError, "invalid value for LiteralValueType");
result = 0;
}
else
*((LiteralValueType *)dst) = value;
break;
default:
assert(false);
break;
}
return result;
}
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