From 08b956e032e3257e04a0dfc90496437b98a7a176 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <pj@pehjota.net>
Date: Mon, 23 Oct 2017 02:27:43 -0400
Subject: MqTree: New type

---
(limited to 'src/tree.h')

diff --git a/src/tree.h b/src/tree.h
new file mode 100644
index 0000000..2fb41fe
--- /dev/null
+++ b/src/tree.h
@@ -0,0 +1,85 @@
+/*
+ * Tree data structure
+ *
+ * Copyright (C) 2017  Patrick McDermott
+ *
+ * This file is part of Marquee.
+ *
+ * Marquee 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.
+ *
+ * Marquee 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 Marquee.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MQ_TREE_H
+#define MQ_TREE_H
+
+typedef struct _MqTree MqTree;
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+#define MQ_TREE(obj) (MqTree *) (obj)
+
+#define MQ_TREE_CONTINUE TRUE
+#define MQ_TREE_STOP     FALSE
+
+struct _MqTree {
+	MqTree   *root;
+	MqTree   *parent;
+	MqTree   *prev;
+	MqTree   *next;
+	MqTree   *first_child;
+	MqTree   *last_child;
+	gint      size;
+	gint      position;
+	gpointer  data;
+};
+
+MqTree *
+mq_tree_insert_root_allocated(MqTree *node, gpointer data);
+
+MqTree *
+mq_tree_insert_child_allocated(MqTree *node, MqTree *parent, gpointer data);
+
+MqTree *
+mq_tree_insert_sibling_allocated(MqTree *node, MqTree *sibling, gpointer data);
+
+#define mq_tree_insert_root(data) \
+	mq_tree_insert_root_allocated(g_new0(MqTree, 1), data)
+#define mq_tree_insert_child(parent, data) \
+	mq_tree_insert_child_allocated(g_new0(MqTree, 1), parent, data)
+#define mq_tree_insert_sibling(sibling, data) \
+	mq_tree_insert_sibling_allocated(g_new0(MqTree, 1), sibling, data)
+
+void
+mq_tree_remove(MqTree *node);
+
+#define mq_tree_size(node)     ((node) ? (((MqTree *) (node))->size) : NULL)
+#define mq_tree_position(node) ((node) ? (((MqTree *) (node))->position) : NULL)
+#define mq_tree_root(node)     ((node) ? (((MqTree *) (node))->root) : NULL)
+#define mq_tree_previous(node) ((node) ? (((MqTree *) (node))->prev) : NULL)
+#define mq_tree_next(node)     ((node) ? (((MqTree *) (node))->prev) : NULL)
+
+MqTree *
+mq_tree_seek(MqTree *node, gint offset);
+
+void
+mq_tree_foreach(MqTree *node, gboolean (*cb)(MqTree *node, va_list ap), ...);
+
+void
+mq_tree_foreach_child(MqTree *node, gboolean (*cb)(MqTree *node, va_list ap),
+	...);
+
+G_END_DECLS
+
+#endif  /* MQ_TREE_H */
--
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