Mon, 20 Dec 2021 11:58:36 +0100
add more nonnull attributes
This also changes the contract for last/first in the sense that these
functions now also require a valid pointer.
/* * 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. */ #include "cx/tree.h" #include "cx/linked_list.h" #define CX_TR_PTR(cur, off) *((void**)(((char*)cur)+off)) void cx_tree_add_sibling(void *node, ptrdiff_t loc_prev, ptrdiff_t loc_next, ptrdiff_t loc_parent, void *new_node) { cx_linked_list_add(&node, NULL, loc_prev, loc_next, new_node); // optional parent link if (loc_parent >= 0) { CX_TR_PTR(new_node, loc_parent) = CX_TR_PTR(node, loc_parent); } } 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) { cx_linked_list_add(children_begin, children_end, loc_prev, loc_next, new_node); // optional parent link if (loc_parent >= 0) { CX_TR_PTR(new_node, loc_parent) = parent; } }