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/* Chrysalide - Outil d'analyse de fichiers binaires
* constants.c - ajout des constantes des définitions de base
*
* Copyright (C) 2024 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 <arch/archbase.h>
#include <common/datatypes.h>
#include "helpers.h"
/******************************************************************************
* *
* Paramètres : module = module dont le dictionnaire est à compléter. *
* *
* Description : Définit les constantes relatives aux définitions de base. *
* *
* Retour : true en cas de succès de l'opération, false sinon. *
* *
* Remarques : - *
* *
******************************************************************************/
bool define_data_types_constants(PyObject *module)
{
bool result; /* Bilan à retourner */
PyObject *values; /* Groupe de valeurs à établir */
values = PyDict_New();
result = add_const_to_group(values, "LITTLE", SRE_LITTLE);
if (result) result = add_const_to_group(values, "LITTLE_WORD", SRE_LITTLE_WORD);
if (result) result = add_const_to_group(values, "BIG_WORD", SRE_BIG_WORD);
if (result) result = add_const_to_group(values, "BIG", SRE_BIG);
if (!result)
{
Py_DECREF(values);
goto exit;
}
result = attach_constants_group_to_module(module, false, "SourceEndian", values,
"Endianness of handled data.");
values = PyDict_New();
result = add_const_to_group(values, "UNDEFINED", MDS_UNDEFINED);
if (result) result = add_const_to_group(values, "_4_BITS_UNSIGNED", MDS_4_BITS_UNSIGNED);
if (result) result = add_const_to_group(values, "_8_BITS_UNSIGNED", MDS_8_BITS_UNSIGNED);
if (result) result = add_const_to_group(values, "_16_BITS_UNSIGNED", MDS_16_BITS_UNSIGNED);
if (result) result = add_const_to_group(values, "_32_BITS_UNSIGNED", MDS_32_BITS_UNSIGNED);
if (result) result = add_const_to_group(values, "_64_BITS_UNSIGNED", MDS_64_BITS_UNSIGNED);
if (result) result = add_const_to_group(values, "_4_BITS_SIGNED", MDS_4_BITS_SIGNED);
if (result) result = add_const_to_group(values, "_8_BITS_SIGNED", MDS_8_BITS_SIGNED);
if (result) result = add_const_to_group(values, "_16_BITS_SIGNED", MDS_16_BITS_SIGNED);
if (result) result = add_const_to_group(values, "_32_BITS_SIGNED", MDS_32_BITS_SIGNED);
if (result) result = add_const_to_group(values, "_64_BITS_SIGNED", MDS_64_BITS_SIGNED);
if (result) result = add_const_to_group(values, "_4_BITS", MDS_4_BITS_UNSIGNED);
if (result) result = add_const_to_group(values, "_8_BITS", MDS_8_BITS_UNSIGNED);
if (result) result = add_const_to_group(values, "_16_BITS", MDS_16_BITS_UNSIGNED);
if (result) result = add_const_to_group(values, "_32_BITS", MDS_32_BITS_UNSIGNED);
if (result) result = add_const_to_group(values, "_64_BITS", MDS_64_BITS_UNSIGNED);
if (!result)
{
Py_DECREF(values);
goto exit;
}
result = attach_constants_group_to_module(module, false, "MemoryDataSize", values,
"Size of processed data.");
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 SourceEndian. *
* *
* Retour : Bilan de l'opération, voire indications supplémentaires. *
* *
* Remarques : - *
* *
******************************************************************************/
int convert_to_source_endian(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 SourceEndian");
break;
case 1:
value = PyLong_AsUnsignedLong(arg);
if (value > SRE_BIG)
{
PyErr_SetString(PyExc_TypeError, "invalid value for SourceEndian");
result = 0;
}
else
*((SourceEndian *)dst) = value;
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 constante MemoryDataSize. *
* *
* Retour : Bilan de l'opération, voire indications supplémentaires. *
* *
* Remarques : - *
* *
******************************************************************************/
int convert_to_memory_data_size(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 MemoryDataSize");
break;
case 1:
value = PyLong_AsUnsignedLong(arg);
if (value != MDS_UNDEFINED
&& (value < MDS_4_BITS_UNSIGNED && value > MDS_64_BITS_UNSIGNED)
&& (value < MDS_4_BITS_SIGNED && value > MDS_64_BITS_SIGNED))
{
PyErr_SetString(PyExc_TypeError, "invalid value for MemoryDataSize");
result = 0;
}
else
*((MemoryDataSize *)dst) = value;
break;
default:
assert(false);
break;
}
return result;
}
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