1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
|
/* Chrysalide - Outil d'analyse de fichiers binaires
* bits.h - équivalent Python du fichier "plugins/kaitai/parsers/bits.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 "bits.h"
#include <assert.h>
#include <pygobject.h>
#include <i18n.h>
#include <plugins/pychrysalide/access.h>
#include <plugins/pychrysalide/helpers.h>
#include <plugins/pychrysalide/analysis/content.h>
#include <plugins/pychrysalide/arch/vmpa.h>
#include "../record.h"
#include "../parsers/attribute.h"
#include "../../records/bits-int.h"
CREATE_DYN_CONSTRUCTOR(record_bit_field, G_TYPE_RECORD_BIT_FIELD);
/* Initialise une instance sur la base du dérivé de GObject. */
static int py_record_bit_field_init(PyObject *, PyObject *, PyObject *);
/* Lit la valeur d'un élément Kaitai entier représenté. */
static PyObject *py_record_bit_field_get_value(PyObject *, void *);
/******************************************************************************
* *
* 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_record_bit_field_init(PyObject *self, PyObject *args, PyObject *kwds)
{
#if 0
GKaitaiAttribute *attrib; /* Attribut défini créateur */
GBinContent *content; /* Contenu binaire analysé */
mrange_t range; /* Espace couvert */
SourceEndian endian; /* Boutisme à observer */
int ret; /* Bilan de lecture des args. */
GRecordBitField *field; /* Création GLib à transmettre */
#endif
#define RECORD_BIT_FIELD_DOC \
"The RecordItem class remembers a match between a described attribute and" \
" its concret value read from parsed binary data." \
"\n" \
"Instances can be created using the following constructor:\n" \
"\n" \
" RecordItem(content, range, endian, attrib)" \
"\n" \
"Where the *attrib* arguments refers to a" \
" pychrysalide.plugins.kaitai.parsers.KaitaiAttribute instance as the" \
" creator of the newly created object, *content* points to a" \
" pychrysalide.analysis.BinContent instance, *range* is a" \
" pychrysalide.arch.mrange object, *endian* states with a" \
" pychrysalide.analysis.BinContent.SourceEndian hint the endianness used" \
" to read integer values."
/* Récupération des paramètres */
#if 0 /* FIXME */
ret = PyArg_ParseTuple(args, "O&O&O&",
convert_to_kaitai_attribute, &attrib,
convert_to_binary_content, &content,
convert_any_to_mrange, &range,
convert_to_binary_content, &endian);
if (!ret) return -1;
/* Initialisation d'un objet GLib */
ret = forward_pygobjet_init(self);
if (ret == -1) return -1;
/* Eléments de base */
field = G_RECORD_BIT_FIELD(pygobject_get(self));
if (!g_record_bit_field_create(field, attrib, content, &range, endian))
{
PyErr_SetString(PyExc_ValueError, _("Unable to create record bit field."));
return -1;
}
return 0;
#endif
PyErr_SetString(PyExc_ValueError, _("Unable to create record bit field at the moment."));
return -1;
}
/******************************************************************************
* *
* Paramètres : self = objet Python concerné par l'appel. *
* closure = non utilisé ici. *
* *
* Description : Lit la valeur d'un élément Kaitai entier représenté. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_record_bit_field_get_value(PyObject *self, void *closure)
{
PyObject *result; /* Valeur à retourner */
GRecordBitField *field; /* Version native de l'élément */
resolved_value_t resolved; /* Valeur sous forme générique */
bool status; /* Bilan d'opération */
#define RECORD_BIT_FIELD_VALUE_ATTRIB PYTHON_GET_DEF_FULL \
( \
value, py_record_bit_field, \
"Carried value (as integer), or None in case of error." \
)
result = NULL;
field = G_RECORD_BIT_FIELD(pygobject_get(self));
status = g_record_bit_field_get_value(field, &resolved);
if (status)
switch (resolved.type)
{
case GVT_UNSIGNED_INTEGER:
result = PyLong_FromUnsignedLongLong(resolved.unsigned_integer);
break;
default:
assert(false);
result = Py_None;
Py_INCREF(result);
break;
}
else
{
result = Py_None;
Py_INCREF(result);
}
return result;
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Fournit un accès à une définition de type à diffuser. *
* *
* Retour : Définition d'objet pour Python. *
* *
* Remarques : - *
* *
******************************************************************************/
PyTypeObject *get_python_record_bit_field_type(void)
{
static PyMethodDef py_record_bit_field_methods[] = {
{ NULL }
};
static PyGetSetDef py_record_bit_field_getseters[] = {
RECORD_BIT_FIELD_VALUE_ATTRIB,
{ NULL }
};
static PyTypeObject py_record_bit_field_type = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "pychrysalide.plugins.kaitai.records.RecordBitField",
.tp_basicsize = sizeof(PyGObject),
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_doc = RECORD_BIT_FIELD_DOC,
.tp_methods = py_record_bit_field_methods,
.tp_getset = py_record_bit_field_getseters,
.tp_init = py_record_bit_field_init,
.tp_new = py_record_bit_field_new,
};
return &py_record_bit_field_type;
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Prend en charge l'objet 'pychrysalide.....RecordBitField. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool ensure_python_record_bit_field_is_registered(void)
{
PyTypeObject *type; /* Type Python 'RecordItem' */
PyObject *module; /* Module à recompléter */
PyObject *dict; /* Dictionnaire du module */
type = get_python_record_bit_field_type();
if (!PyType_HasFeature(type, Py_TPFLAGS_READY))
{
module = get_access_to_python_module("pychrysalide.plugins.kaitai.records");
dict = PyModule_GetDict(module);
if (!ensure_python_match_record_is_registered())
return false;
if (!register_class_for_pygobject(dict, G_TYPE_RECORD_BIT_FIELD, 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 correspondance attribut/binaire. *
* *
* Retour : Bilan de l'opération, voire indications supplémentaires. *
* *
* Remarques : - *
* *
******************************************************************************/
int convert_to_record_bit_field(PyObject *arg, void *dst)
{
int result; /* Bilan à retourner */
result = PyObject_IsInstance(arg, (PyObject *)get_python_record_bit_field_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 record bit field");
break;
case 1:
*((GRecordBitField **)dst) = G_RECORD_BIT_FIELD(pygobject_get(arg));
break;
default:
assert(false);
break;
}
return result;
}
|
