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-rw-r--r--plugins/pychrysalide/analysis/scan/exprs/literal.c281
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diff --git a/plugins/pychrysalide/analysis/scan/exprs/literal.c b/plugins/pychrysalide/analysis/scan/exprs/literal.c
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+++ b/plugins/pychrysalide/analysis/scan/exprs/literal.c
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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * literal.c - équivalent Python du fichier "analysis/scan/exprs/literal.c"
+ *
+ * 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 "literal.h"
+
+
+#include <pygobject.h>
+
+
+#include <i18n.h>
+#include <analysis/scan/exprs/literal-int.h>
+
+
+#include "constants.h"
+#include "../expr.h"
+#include "../../../access.h"
+#include "../../../helpers.h"
+
+
+
+CREATE_DYN_CONSTRUCTOR(scan_literal_expression, G_TYPE_SCAN_LITERAL_EXPRESSION);
+
+/* Initialise une instance sur la base du dérivé de GObject. */
+static int py_scan_literal_expression_init(PyObject *, PyObject *, PyObject *);
+
+
+
+/******************************************************************************
+* *
+* 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_scan_literal_expression_init(PyObject *self, PyObject *args, PyObject *kwds)
+{
+ PyObject *py_value; /* Valeur en version Python */
+ int ret; /* Bilan de lecture des args. */
+ LiteralValueType vtype; /* Valeur à porter */
+ bool arg_boolean; /* Argument natif booléen */
+ unsigned long long arg_uinteger; /* Argument natif entier */
+ sized_string_t arg_string; /* Argument natif textuel */
+ Py_ssize_t arg_str_length; /* Taille de ce texte */
+ void *arg_ptr; /* Pointeur vers un argument */
+ GScanLiteralExpression *expr; /* Création GLib à transmettre */
+
+#define SCAN_LITERAL_EXPRESSION_DOC \
+ "A ScanLiteralExpression object defines expression carrying" \
+ " literal values available for scan match conditions.\n" \
+ "\n" \
+ "Instances can be created using one of the following" \
+ " constructors:\n" \
+ "\n" \
+ " ScanLiteralExpression(value)" \
+ "\n" \
+ "\n" \
+ "Where *value* is either a boolean, an integer or bytes."
+
+ /* Récupération des paramètres */
+
+ ret = PyArg_ParseTuple(args, "O", &py_value);
+ if (!ret) return -1;
+
+ if (PyBool_Check(py_value))
+ {
+ vtype = LVT_BOOLEAN;
+
+ arg_boolean = (py_value == Py_True);
+ arg_ptr = &arg_boolean;
+
+ }
+
+ else if (PyLong_Check(py_value))
+ {
+ if (1 /* sign - TODO */)
+ ;
+
+ vtype = LVT_UNSIGNED_INTEGER;
+
+ arg_uinteger = PyLong_AsUnsignedLongLong(py_value);
+ arg_ptr = &arg_uinteger;
+
+ }
+
+ else if (PyBytes_Check(py_value))
+ {
+ vtype = LVT_STRING;
+
+ ret = PyBytes_AsStringAndSize(py_value, &arg_string.data, &arg_str_length);
+ if (ret == -1) return -1;
+
+ arg_string.len = arg_str_length;
+ arg_ptr = &arg_string;
+
+ }
+
+ else
+ {
+ PyErr_SetString(PyExc_ValueError, _("Unsupported Python value for a literal scan expression."));
+ return -1;
+ }
+
+ /* Initialisation d'un objet GLib */
+
+ ret = forward_pygobjet_init(self);
+ if (ret == -1) return -1;
+
+ /* Eléments de base */
+
+ expr = G_SCAN_LITERAL_EXPRESSION(pygobject_get(self));
+
+ if (!g_scan_literal_expression_create(expr, vtype, arg_ptr))
+ {
+ PyErr_SetString(PyExc_ValueError, _("Unable to create literal expression."));
+ return -1;
+ }
+
+ return 0;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : - *
+* *
+* Description : Fournit un accès à une définition de type à diffuser. *
+* *
+* Retour : Définition d'objet pour Python. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+PyTypeObject *get_python_scan_literal_expression_type(void)
+{
+ static PyMethodDef py_scan_literal_expression_methods[] = {
+ { NULL }
+ };
+
+ static PyGetSetDef py_scan_literal_expression_getseters[] = {
+ { NULL }
+ };
+
+ static PyTypeObject py_scan_literal_expression_type = {
+
+ PyVarObject_HEAD_INIT(NULL, 0)
+
+ .tp_name = "pychrysalide.analysis.scan.exprs.ScanLiteralExpression",
+ .tp_basicsize = sizeof(PyGObject),
+
+ .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
+
+ .tp_doc = SCAN_LITERAL_EXPRESSION_DOC,
+
+ .tp_methods = py_scan_literal_expression_methods,
+ .tp_getset = py_scan_literal_expression_getseters,
+
+ .tp_init = py_scan_literal_expression_init,
+ .tp_new = py_scan_literal_expression_new,
+
+ };
+
+ return &py_scan_literal_expression_type;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : - *
+* *
+* Description : Prend en charge l'objet 'pychrysalide....PlainModifier'. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool ensure_python_scan_literal_expression_is_registered(void)
+{
+ PyTypeObject *type; /* Type Python 'PlainModifier' */
+ PyObject *module; /* Module à recompléter */
+ PyObject *dict; /* Dictionnaire du module */
+
+ type = get_python_scan_literal_expression_type();
+
+ if (!PyType_HasFeature(type, Py_TPFLAGS_READY))
+ {
+ module = get_access_to_python_module("pychrysalide.analysis.scan.exprs");
+
+ dict = PyModule_GetDict(module);
+
+ if (!ensure_python_scan_expression_is_registered())
+ return false;
+
+ if (!register_class_for_pygobject(dict, G_TYPE_SCAN_LITERAL_EXPRESSION, type))
+ return false;
+
+ if (!define_literal_expression_value_type_constants(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 transmission d'octets à l'identique. *
+* *
+* Retour : Bilan de l'opération, voire indications supplémentaires. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+int convert_to_scan_literal_expression(PyObject *arg, void *dst)
+{
+ int result; /* Bilan à retourner */
+
+ result = PyObject_IsInstance(arg, (PyObject *)get_python_scan_literal_expression_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 scan literal expression");
+ break;
+
+ case 1:
+ *((GScanLiteralExpression **)dst) = G_SCAN_LITERAL_EXPRESSION(pygobject_get(arg));
+ break;
+
+ default:
+ assert(false);
+ break;
+
+ }
+
+ return result;
+
+}
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