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diff --git a/src/glibext/widthtracker-int.h b/src/glibext/widthtracker-int.h
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+++ b/src/glibext/widthtracker-int.h
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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * widthtracker-int.h - prototypes internes pour le suivi des largeurs associées à un ensemble de lignes
+ *
+ * Copyright (C) 2016-2024 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 Chrysalide.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef _GLIBEXT_WIDTHTRACKER_INT_H
+#define _GLIBEXT_WIDTHTRACKER_INT_H
+
+
+#include "widthtracker.h"
+
+
+
+/* Portions de largeurs communes */
+typedef struct _common_metrics_t
+{
+    size_t first;                           /* Premier indice de portion   */
+    size_t last;                            /* Dernier indice de portion   */
+
+    size_t merging_index;                   /* Indice de colonne de fusion */
+
+    int *summary;                           /* Compilation de largeurs     */
+    bool cached;                            /* Mise en cache des calculs   */
+
+} common_metrics_t;
+
+
+/* Gestionnaire de largeurs associées aux lignes (instance) */
+struct _GWidthTracker
+{
+    GObject parent;                         /* A laisser en premier        */
+
+    GBufferCache *cache;                    /* Ensemble complet de lignes  */
+    size_t opt_count;                       /* Qté de colonnes en option   */
+    size_t reg_count;                       /* Nombre de colonnes normales */
+#ifndef NDEBUG
+    size_t col_count;                       /* Nombre maximum de colonnes  */
+#endif
+
+    common_metrics_t *locals;               /* Portions représentées       */
+    size_t count;                           /* Quantité de ces portions    */
+
+    int *min_widths;                        /* Largeurs requises suivies   */
+    bool *fixed;                            /* Indication d'impositions    */
+    bool cached;                            /* Mise en cache des calculs   */
+
+};
+
+/* Gestionnaire de largeurs associées aux lignes (classe) */
+struct _GWidthTrackerClass
+{
+    GObjectClass parent;                    /* A laisser en premier        */
+
+};
+
+
+/* Met en place un nouveau suivi de largeurs au sein de lignes. */
+bool g_width_tracker_create(GWidthTracker *, GBufferCache *);
+
+
+
+#endif  /* _GLIBEXT_WIDTHTRACKER_INT_H */