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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * intersect.c - intersection d'ensembles aux types indentiques
+ *
+ * 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "intersect.h"
+
+
+#include <assert.h>
+
+
+#include "intersect-int.h"
+#include "literal.h"
+
+
+
+/* --------------------- INTRODUCTION D'UNE NOUVELLE EXPRESSION --------------------- */
+
+
+/* Initialise la classe des intersections entre deux ensembles. */
+static void g_scan_sets_intersection_class_init(GScanSetsIntersectionClass *);
+
+/* Initialise une instance d'intersection entre deux ensembles. */
+static void g_scan_sets_intersection_init(GScanSetsIntersection *);
+
+/* Supprime toutes les références externes. */
+static void g_scan_sets_intersection_dispose(GScanSetsIntersection *);
+
+/* Procède à la libération totale de la mémoire. */
+static void g_scan_sets_intersection_finalize(GScanSetsIntersection *);
+
+
+
+/* --------------------- IMPLEMENTATION DES FONCTIONS DE CLASSE --------------------- */
+
+
+/* Réduit une expression à une forme plus simple. */
+static ScanReductionState g_scan_sets_intersection_reduce(const GScanSetsIntersection *, GScanContext *, GScanScope *, GScanExpression **);
+
+
+
+/* ---------------------------------------------------------------------------------- */
+/* INTRODUCTION D'UNE NOUVELLE EXPRESSION */
+/* ---------------------------------------------------------------------------------- */
+
+
+/* Indique le type défini pour une intersection entre deux ensembles. */
+G_DEFINE_TYPE(GScanSetsIntersection, g_scan_sets_intersection, G_TYPE_SCAN_EXPRESSION);
+
+
+/******************************************************************************
+* *
+* Paramètres : klass = classe à initialiser. *
+* *
+* Description : Initialise la classe des intersections entre deux ensembles. *
+* *
+* Retour : - *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static void g_scan_sets_intersection_class_init(GScanSetsIntersectionClass *klass)
+{
+ GObjectClass *object; /* Autre version de la classe */
+ GScanExpressionClass *expr; /* Version de classe parente */
+
+ object = G_OBJECT_CLASS(klass);
+
+ object->dispose = (GObjectFinalizeFunc/* ! */)g_scan_sets_intersection_dispose;
+ object->finalize = (GObjectFinalizeFunc)g_scan_sets_intersection_finalize;
+
+ expr = G_SCAN_EXPRESSION_CLASS(klass);
+
+ expr->reduce = (reduce_expr_fc)g_scan_sets_intersection_reduce;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : op = instance à initialiser. *
+* *
+* Description : Initialise une instance d'intersection entre deux ensembles. *
+* *
+* Retour : - *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static void g_scan_sets_intersection_init(GScanSetsIntersection *inter)
+{
+ inter->first = NULL;
+ inter->second = NULL;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : inter = instance d'objet GLib à traiter. *
+* *
+* Description : Supprime toutes les références externes. *
+* *
+* Retour : - *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static void g_scan_sets_intersection_dispose(GScanSetsIntersection *inter)
+{
+ g_clear_object(&inter->first);
+ g_clear_object(&inter->second);
+
+ G_OBJECT_CLASS(g_scan_sets_intersection_parent_class)->dispose(G_OBJECT(inter));
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : inter = instance d'objet GLib à traiter. *
+* *
+* Description : Procède à la libération totale de la mémoire. *
+* *
+* Retour : - *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static void g_scan_sets_intersection_finalize(GScanSetsIntersection *inter)
+{
+ G_OBJECT_CLASS(g_scan_sets_intersection_parent_class)->finalize(G_OBJECT(inter));
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : type = type d'opération booléenne à représenter. *
+* first = premier élément concerné. *
+* second = second élément concerné. *
+* *
+* Description : Organise une intersection entre deux ensembles. *
+* *
+* Retour : Expression mise en place. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+GScanExpression *g_scan_sets_intersection_new(GScanExpression *first, GScanExpression *second)
+{
+ GScanExpression *result; /* Structure à retourner */
+
+ result = g_object_new(G_TYPE_SCAN_SETS_INTERSECTION, NULL);
+
+ if (!g_scan_sets_intersection_create(G_SCAN_SETS_INTERSECTION(result), first, second))
+ g_clear_object(&result);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : inter = instance à initialiser pleinement. *
+* first = premier élément concerné. *
+* second = second élément concerné. *
+* *
+* Description : Met en place une expression d'opération booléenne. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool g_scan_sets_intersection_create(GScanSetsIntersection *inter, GScanExpression *first, GScanExpression *second)
+{
+ bool result; /* Bilan à retourner */
+
+ result = true;
+
+ inter->first = first;
+ g_object_ref(G_OBJECT(first));
+
+ inter->second = second;
+ g_object_ref(G_OBJECT(second));
+
+ return result;
+
+}
+
+
+
+/* ---------------------------------------------------------------------------------- */
+/* IMPLEMENTATION DES FONCTIONS DE CLASSE */
+/* ---------------------------------------------------------------------------------- */
+
+
+/******************************************************************************
+* *
+* Paramètres : expr = expression à consulter. *
+* ctx = contexte de suivi de l'analyse courante. *
+* scope = portée courante des variables locales. *
+* out = zone d'enregistrement de la réduction opérée. [OUT] *
+* *
+* Description : Réduit une expression à une forme plus simple. *
+* *
+* Retour : Bilan de l'opération : false en cas d'erreur irrécupérable. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static ScanReductionState g_scan_sets_intersection_reduce(const GScanSetsIntersection *expr, GScanContext *ctx, GScanScope *scope, GScanExpression **out)
+{
+ ScanReductionState result; /* Etat synthétisé à retourner */
+ GScanExpression *new_first; /* Nouvelle réduction #1 */
+ GScanExpression *new_second; /* Nouvelle réduction #2 */
+ ScanReductionState state_first; /* Etat synthétisé #1 */
+ ScanReductionState state_second; /* Etat synthétisé #2 */
+
+ new_first = NULL;
+ new_second = NULL;
+
+ state_first = g_scan_expression_reduce(expr->first, ctx, scope, &new_first);
+ if (state_first == SRS_UNRESOLVABLE)
+ {
+ result = SRS_UNRESOLVABLE;
+ goto exit;
+ }
+
+ state_second = g_scan_expression_reduce(expr->second, ctx, scope, &new_second);
+ if (state_second == SRS_UNRESOLVABLE)
+ {
+ result = SRS_UNRESOLVABLE;
+ goto exit;
+ }
+
+ if (state_first == SRS_WAIT_FOR_SCAN || state_second == SRS_WAIT_FOR_SCAN)
+ {
+ if (new_first != expr->first || new_second != expr->second)
+ *out = g_scan_sets_intersection_new(new_first, new_second);
+
+ result = SRS_WAIT_FOR_SCAN;
+
+ }
+
+ else
+ {
+ assert(state_first == SRS_REDUCED && state_second == SRS_REDUCED);
+
+ *out = g_scan_expression_intersect(new_first, new_second, ctx, scope);
+
+ result = (*out != NULL ? SRS_REDUCED : SRS_UNRESOLVABLE);
+
+ }
+
+ exit:
+
+ g_clear_object(&new_first);
+ g_clear_object(&new_second);
+
+ return result;
+
+}
generated by cgit v0.11.2-87-g4458 at 2024-04-27 22:30:22 (GMT)