diff -r aeaf7db26fac -r c094afcdfb27 src/ucx/cx/tree.h
--- a/src/ucx/cx/tree.h	Sun Jul 09 15:14:26 2023 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,136 +0,0 @@
-/*
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
- *
- * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *   1. Redistributions of source code must retain the above copyright
- *      notice, this list of conditions and the following disclaimer.
- *
- *   2. Redistributions in binary form must reproduce the above copyright
- *      notice, this list of conditions and the following disclaimer in the
- *      documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-/**
- * \file tree.h
- * \brief Interface for tree implementations.
- * \author Olaf Wintermann
- * \author Mike Becker
- * \version 3.0
- * \copyright 2-Clause BSD License
- */
-
-#ifndef UCX_TREE_H
-#define UCX_TREE_H
-
-#include "common.h"
-#include "allocator.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * Adds a sibling to the current tree node.
- *
- * In case your struct does not have a \p prev or a \p parent pointer,
- * specify a negative location. The location of the \p next pointer is
- * mandatory.
- *
- * \attention Do not use this function to add siblings in a tree where the
- * nodes store a pointer to the last sibling because that would not be modified by this function.
- *
- * \remark If yo do not provide a location to the parent pointer, a call to this function is
- * effectively the same as a call to cx_linked_list_add().
- *
- * @param node a pointer to the node
- * @param loc_prev the location of a \c prev pointer within your node struct
- * @param loc_next the location of a \c next pointer within your node struct
- * @param loc_parent the location of a \c parent pointer within your node struct
- * @param new_node the new node that shall be added as a sibling
- */
-void cx_tree_add_sibling(void *node,
-                         ptrdiff_t loc_prev, ptrdiff_t loc_next,
-                         ptrdiff_t loc_parent,
-                         void *new_node)
-__attribute__((__nonnull__));
-
-/**
- * Adds a node to the list of children.
- *
- * \par Example with a full structure
- * A full tree node structure may look like this:
- * \code
- * typedef struct MyTreeNode MyTreeNode;
- * struct MyTreeNode {
- *   MyTreeNode* parent;
- *   MyTreeNode* first_child;
- *   MyTreeNode* last_child;
- *   MyTreeNode* prev_sibling;
- *   MyTreeNode* next_sibling;
- *   // ...contents...
- * }
- * \endcode
- * Adding a new child to a node with the above structure can be performed with the following call:
- * \code
- * MyTreeNode *node, *child; // given
- * cx_tree_add_child(&node->first_child, &node->last_child,
- *                   offsetof(MyTreeNode, prev_sibling), offsetof(MyTreeNode, next_sibling),
- *                   child, offsetof(MyTreeNode, parent), node);
- * \endcode
- *
- * \par Example with a reduced structure
- * The minimal reasonable structure with parent pointer looks like this:
- * \code
- * typedef struct MyTreeNode MyTreeNode;
- * struct MyTreeNode {
- *   MyTreeNode* parent;
- *   MyTreeNode* children;
- *   MyTreeNode* next_sibling;
- *   // ...contents...
- * }
- * \endcode
- * This simplifies the function call to:
- * \code
- * MyTreeNode *node, *child; // given
- * cx_tree_add_child(&node->children, NULL, -1, offsetof(MyTreeNode, next_sibling),
- *                   child, offsetof(MyTreeNode, parent), node);
- * \endcode
- *
- * \remark If your tree structure does not possess a parent pointer, a call to this function is
- * effectively the same as a call to cx_linked_list_add().
- *
- * @param children_begin a pointer to the begin node pointer (if your list has one)
- * @param children_end a pointer to the end node pointer (if your list has one)
- * @param loc_prev the location of a \c prev pointer within your node struct
- * @param loc_next the location of a \c next pointer within your node struct
- * @param new_node a pointer to the node that shall be appended
- * @param loc_parent the location of a \c parent pointer within your node struct
- * @param parent the parent node
- */
-void cx_tree_add_child(void **children_begin, void **children_end,
-                       ptrdiff_t loc_prev, ptrdiff_t loc_next, void *new_node,
-                       ptrdiff_t loc_parent, void *parent)
-__attribute__((__nonnull__ (5)));
-
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
-#endif // UCX_TREE_H
-