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diff --git a/src/glibext/comparison.h b/src/glibext/comparison.h
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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * comparison.h - prototypes pour les opérations de comparaison d'objets
+ *
+ * Copyright (C) 2022 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/>.
+ */
+
+
+#ifndef _GLIBEXT_COMPARISON_H
+#define _GLIBEXT_COMPARISON_H
+
+
+#include <glib-object.h>
+#include <stdbool.h>
+
+
+
+#define G_TYPE_COMPARABLE_ITEM             (g_comparable_item_get_type())
+#define G_COMPARABLE_ITEM(obj)             (G_TYPE_CHECK_INSTANCE_CAST((obj), G_TYPE_COMPARABLE_ITEM, GComparableItem))
+#define G_COMPARABLE_ITEM_CLASS(vtable)    (G_TYPE_CHECK_CLASS_CAST((vtable), G_TYPE_COMPARABLE_ITEM, GComparableItemIface))
+#define G_IS_COMPARABLE_ITEM(obj)          (G_TYPE_CHECK_INSTANCE_TYPE((obj), G_TYPE_COMPARABLE_ITEM))
+#define G_IS_COMPARABLE_ITEM_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE((vtable), G_TYPE_COMPARABLE_ITEM))
+#define G_COMPARABLE_ITEM_GET_IFACE(inst)  (G_TYPE_INSTANCE_GET_INTERFACE((inst), G_TYPE_COMPARABLE_ITEM, GComparableItemIface))
+
+
+/* Instance d'élément comparable (coquille vide) */
+typedef struct _GComparableItem GComparableItem;
+
+/* Instance d'élément comparable (interface) */
+typedef struct _GComparableItemIface GComparableItemIface;
+
+
+/* Modes de comparaison */
+typedef enum _RichCmpOperation
+{
+    RCO_LT,                                 /* Equivalent de '<'           */
+    RCO_LE,                                 /* Equivalent de '<='          */
+    RCO_EQ,                                 /* Equivalent de '=='          */
+    RCO_NE,                                 /* Equivalent de '!='          */
+    RCO_GT,                                 /* Equivalent de '>'           */
+    RCO_GE,                                 /* Equivalent de '>°'          */
+
+} RichCmpOperation;
+
+/* Détermination d'un besoin de comparaison supplémentaire */
+#define STATUS_NOT_EQUAL(_s, _o)                            \
+    ({                                                      \
+        bool __result;                                      \
+        if (_o == RCO_LE || _o == RCO_EQ || _o == RCO_GE)   \
+            __result = !_s;                                 \
+        else                                                \
+            __result = _s;                                  \
+        __result;                                           \
+    })
+
+
+/* Détermine le type d'une interface pour un objet comparable. */
+GType g_comparable_item_get_type(void) G_GNUC_CONST;
+
+/* Réalise une comparaison entre objets selon un critère précis. */
+bool g_comparable_item_compare_rich(const GComparableItem *, const GComparableItem *, RichCmpOperation, bool *);
+
+
+
+#endif  /* _GLIBEXT_COMPARISON_H */