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/* Chrysalide - Outil d'analyse de fichiers binaires
* cattribs.c - équivalent Python du fichier "analysis/cattribs.h"
*
* Copyright (C) 2019 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 "cattribs.h"
#include <pygobject.h>
#include <i18n.h>
#include <analysis/cattribs.h>
#include "../access.h"
#include "../helpers.h"
/* Crée un nouvel objet Python de type 'ContentAttributes'. */
static PyObject *py_content_attributes_new(PyTypeObject *, PyObject *, PyObject *);
/* Fournit l'ensemble des clefs d'un ensemble d'attributs. */
static PyObject *py_content_attributes_subscript(PyObject *, PyObject *);
/* Fournit l'ensemble des clefs d'un ensemble d'attributs. */
static PyObject *py_content_attributes_get_keys(PyObject *, void *);
/******************************************************************************
* *
* Paramètres : type = type de l'objet à instancier. *
* args = arguments fournis à l'appel. *
* kwds = arguments de type key=val fournis. *
* *
* Description : Crée un nouvel objet Python de type 'ContentAttributes'. *
* *
* Retour : Instance Python mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_content_attributes_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
PyObject *result; /* Instance à retourner */
const char *path; /* Chemin d'accès à traiter */
int ret; /* Bilan de lecture des args. */
char *filename; /* Nom de fichier embarqué */
GContentAttributes *attribs; /* Création GLib à transmettre */
PyObject *obj; /* Objet Python à retourner */
PyObject *str; /* Chaîne à retourner */
#define CONTENT_ATTRIBUTES_DOC \
"ContentAttributes is a set of values used at binary content loading.\n" \
"\n" \
"Such parameters are useful to transmit password for encrypted contents" \
" for instance. These parameters can be accessed like dictionary items:\n" \
"\n" \
" password = attributes['password']\n" \
" attributes['password'] = 'updated'\n" \
"\n" \
"Instances can be created using the following constructor:\n" \
"\n" \
" ContentAttributes(path)\n" \
"\n" \
"Where path is a list of parameters: '[...]&key0=value0&key1=value1...'" \
"\n" \
"The constructor returns a tuple containing a ContentAttributes instance" \
" and the original targot filename."
ret = PyArg_ParseTuple(args, "s", &path);
if (!ret) return NULL;
attribs = g_content_attributes_new(path, &filename);
if (attribs != NULL)
{
g_object_ref_sink(G_OBJECT(attribs));
obj = pygobject_new(G_OBJECT(attribs));
g_object_unref(attribs);
}
else
{
obj = Py_None;
Py_INCREF(obj);
}
if (filename != NULL)
{
str = PyUnicode_FromString(filename);
free(filename);
}
else
{
str = Py_None;
Py_INCREF(str);
}
result = PyTuple_New(2);
PyTuple_SetItem(result, 0, obj);
PyTuple_SetItem(result, 1, str);
return result;
}
/******************************************************************************
* *
* Paramètres : self = objet Python concerné par l'appel. *
* key = clef d'accès servant d'indice. *
* *
* Description : Fournit l'ensemble des clefs d'un ensemble d'attributs. *
* *
* Retour : Valeur associée à la clef trouvée, ou NULL en cas d'échec. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_content_attributes_subscript(PyObject *self, PyObject *key)
{
PyObject *result; /* Valeur à retourner */
void *keyval; /* Valeur brute de la clef */
GContentAttributes *cattribs; /* Version native */
const char *value; /* Valeur brute trouvée */
result = NULL;
if (!PyUnicode_Check(key))
PyErr_SetString(PyExc_TypeError, "key must be a string value");
else
{
keyval = PyUnicode_DATA(key);
cattribs = G_CONTENT_ATTRIBUTES(pygobject_get(self));
value = g_content_attributes_get_value(cattribs, keyval);
if (value == NULL)
PyErr_SetString(PyExc_KeyError, "attribute value not found for the provided key");
else
result = PyUnicode_FromString(value);
}
return result;
}
/******************************************************************************
* *
* Paramètres : self = objet Python concerné par l'appel. *
* closure = non utilisé ici. *
* *
* Description : Fournit l'ensemble des clefs d'un ensemble d'attributs. *
* *
* Retour : Liste de clefs des attributes conservés dans l'ensemble. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_content_attributes_get_keys(PyObject *self, void *closure)
{
PyObject *result; /* Valeur à retourner */
GContentAttributes *cattribs; /* Version native */
size_t count; /* Nombre d'éléments à traiter */
const char **keys; /* Clefs des attributs */
size_t i; /* Boucle de parcours */
#define CONTENT_ATTRIBUTES_KEYS_ATTRIB PYTHON_GET_DEF_FULL \
( \
keys, py_content_attributes, \
"Keys of all attributes contained in a set of values." \
)
cattribs = G_CONTENT_ATTRIBUTES(pygobject_get(self));
keys = g_content_attributes_get_keys(cattribs, &count);
result = PyTuple_New(count);
for (i = 0; i < count; i++)
PyTuple_SetItem(result, i, PyUnicode_FromString(keys[i]));
return result;
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Fournit un accès à une définition de type à diffuser. *
* *
* Retour : Définition d'objet pour Python. *
* *
* Remarques : - *
* *
******************************************************************************/
PyTypeObject *get_python_content_attributes_type(void)
{
static PyMappingMethods py_content_attributes_mapping = {
.mp_length = NULL,
.mp_subscript = py_content_attributes_subscript,
.mp_ass_subscript = NULL
};
static PyMethodDef py_content_attributes_methods[] = {
{ NULL }
};
static PyGetSetDef py_content_attributes_getseters[] = {
CONTENT_ATTRIBUTES_KEYS_ATTRIB,
{ NULL }
};
static PyTypeObject py_content_attributes_type = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "pychrysalide.analysis.ContentAttributes",
.tp_as_mapping = &py_content_attributes_mapping,
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_doc = CONTENT_ATTRIBUTES_DOC,
.tp_methods = py_content_attributes_methods,
.tp_getset = py_content_attributes_getseters,
.tp_new = py_content_attributes_new
};
return &py_content_attributes_type;
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Prend en charge l'objet 'pychrysalide.....ContentAttributes'.*
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool ensure_python_content_attributes_is_registered(void)
{
PyTypeObject *type; /* Type 'ContentAttributes' */
PyObject *module; /* Module à recompléter */
PyObject *dict; /* Dictionnaire du module */
type = get_python_content_attributes_type();
if (!PyType_HasFeature(type, Py_TPFLAGS_READY))
{
module = get_access_to_python_module("pychrysalide.analysis");
dict = PyModule_GetDict(module);
if (!register_class_for_pygobject(dict, G_TYPE_CONTENT_ATTRIBUTES, 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 ensemble d'attributs pour contenu. *
* *
* Retour : Bilan de l'opération, voire indications supplémentaires. *
* *
* Remarques : - *
* *
******************************************************************************/
int convert_to_content_attributes(PyObject *arg, void *dst)
{
int result; /* Bilan à retourner */
result = PyObject_IsInstance(arg, (PyObject *)get_python_content_attributes_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 content attributes");
break;
case 1:
*((GContentAttributes **)dst) = G_CONTENT_ATTRIBUTES(pygobject_get(arg));
break;
default:
assert(false);
break;
}
return result;
}
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