diff options
author | Cyrille Bagard <nocbos@gmail.com> | 2017-12-31 13:42:25 (GMT) |
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committer | Cyrille Bagard <nocbos@gmail.com> | 2017-12-31 13:42:25 (GMT) |
commit | e0ab9498f78ee6b4fbbba25400d78436db682899 (patch) | |
tree | bd2780e6d9613d911a36706742b5b729b9ab6a12 /plugins/pychrysa/struct.c | |
parent | 8d4ec01c81c7f4ccad89ed53d2f34acabec4f595 (diff) |
Provided access to Elf structures from Python.
Diffstat (limited to 'plugins/pychrysa/struct.c')
-rw-r--r-- | plugins/pychrysa/struct.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/plugins/pychrysa/struct.c b/plugins/pychrysa/struct.c new file mode 100644 index 0000000..33b58b8 --- /dev/null +++ b/plugins/pychrysa/struct.c @@ -0,0 +1,161 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * struct.c - prototypes pour la conversion de structures C en équivalent Python + * + * Copyright (C) 2017 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 "struct.h" + + + +/* Objet à vocation abstraite */ +typedef struct _PyStructObject +{ + PyDictObject base; /* A laisser en premier */ + +} PyStructObject; + + +/* Assure l'encadrement des accès aux champs d'une structure. */ +static PyObject *py_struct_getattr(PyObject *, char *); + + + +/****************************************************************************** +* * +* Paramètres : self = structure C convertie en Python. * +* name = nom du champ auquel un accès est demandé. * +* * +* Description : Assure l'encadrement des accès aux champs d'une structure. * +* * +* Retour : Valeur du champ demandé. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static PyObject *py_struct_getattr(PyObject *self, char *name) +{ + PyObject *result; /* Elément à retourner */ + PyObject *w; /* Conversion du nom de champ */ + PyTypeObject *tp; /* Type de l'objet manipulé */ + + result = PyDict_GetItemString(self, name); + + if (result != NULL) + Py_INCREF(result); + + else + { + w = PyUnicode_InternFromString(name); + if (w == NULL) return NULL; + + tp = Py_TYPE(self); + + if (tp->tp_base->tp_getattro != NULL) + result = tp->tp_base->tp_getattro(self, w); + + Py_DECREF(w); + + } + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Fournit un accès à une définition de type à diffuser. * +* * +* Retour : Définition d'objet pour Python. * +* * +* Remarques : - * +* * +******************************************************************************/ + +PyTypeObject *get_python_py_struct_type(void) +{ + static PyMethodDef py_struct_methods[] = { + { NULL } + }; + + static PyGetSetDef py_struct_getseters[] = { + { NULL } + }; + + static PyTypeObject py_struct_type = { + + PyVarObject_HEAD_INIT(NULL, 0) + + .tp_name = "pychrysalide.PyStructObject", + .tp_basicsize = sizeof(PyStructObject), + + .tp_getattr = py_struct_getattr, + + .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, + + .tp_doc = "PyChrysalide structure", + + .tp_methods = py_struct_methods, + .tp_getset = py_struct_getseters, + .tp_base = &PyDict_Type, + + }; + + return &py_struct_type; + +} + + +/****************************************************************************** +* * +* Paramètres : module = module dont la définition est à compléter. * +* * +* Description : Prend en charge l'objet 'pychrysalide.PyStructObject'. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool register_python_py_struct(PyObject *module) +{ + PyTypeObject *py_struct_type; /* Type Python 'PyStructObject'*/ + int ret; /* Bilan des préparatifs */ + + py_struct_type = get_python_py_struct_type(); + + ret = PyType_Ready(py_struct_type); + + if (ret != 0) + return false; + + Py_INCREF(py_struct_type); + + PyModule_AddObject(module, "PyStructObject", (PyObject *)py_struct_type);; + + return true; + +} |