/* 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 .
*/
#include "intersect.h"
#include
#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;
}