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-rw-r--r--libarchive/archive_rb.h100
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diff --git a/libarchive/archive_rb.h b/libarchive/archive_rb.h
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+/*-
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas <matt@3am-software.com>.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ *
+ * Based on NetBSD: rb.h,v 1.13 2009/08/16 10:57:01 yamt Exp
+ */
+#ifndef ARCHIVE_RB_H_
+#define ARCHIVE_RB_H_
+
+struct archive_rb_node {
+ struct archive_rb_node *rb_nodes[2];
+ /*
+ * rb_info contains the two flags and the parent back pointer.
+ * We put the two flags in the low two bits since we know that
+ * rb_node will have an alignment of 4 or 8 bytes.
+ */
+ uintptr_t rb_info;
+};
+
+#define ARCHIVE_RB_DIR_LEFT 0
+#define ARCHIVE_RB_DIR_RIGHT 1
+
+#define ARCHIVE_RB_TREE_MIN(T) \
+ __archive_rb_tree_iterate((T), NULL, ARCHIVE_RB_DIR_LEFT)
+#define ARCHIVE_RB_TREE_MAX(T) \
+ __archive_rb_tree_iterate((T), NULL, ARCHIVE_RB_DIR_RIGHT)
+#define ARCHIVE_RB_TREE_FOREACH(N, T) \
+ for ((N) = ARCHIVE_RB_TREE_MIN(T); (N); \
+ (N) = __archive_rb_tree_iterate((T), (N), ARCHIVE_RB_DIR_RIGHT))
+#define ARCHIVE_RB_TREE_FOREACH_REVERSE(N, T) \
+ for ((N) = ARCHIVE_RB_TREE_MAX(T); (N); \
+ (N) = __archive_rb_tree_iterate((T), (N), ARCHIVE_RB_DIR_LEFT))
+
+/*
+ * archive_rbto_compare_nodes_fn:
+ * return a positive value if the first node < the second node.
+ * return a negative value if the first node > the second node.
+ * return 0 if they are considered same.
+ *
+ * archive_rbto_compare_key_fn:
+ * return a positive value if the node < the key.
+ * return a negative value if the node > the key.
+ * return 0 if they are considered same.
+ */
+
+typedef signed int (*const archive_rbto_compare_nodes_fn)(const struct archive_rb_node *,
+ const struct archive_rb_node *);
+typedef signed int (*const archive_rbto_compare_key_fn)(const struct archive_rb_node *,
+ const void *);
+
+struct archive_rb_tree_ops {
+ archive_rbto_compare_nodes_fn rbto_compare_nodes;
+ archive_rbto_compare_key_fn rbto_compare_key;
+};
+
+struct archive_rb_tree {
+ struct archive_rb_node *rbt_root;
+ const struct archive_rb_tree_ops *rbt_ops;
+};
+
+void __archive_rb_tree_init(struct archive_rb_tree *,
+ const struct archive_rb_tree_ops *);
+int __archive_rb_tree_insert_node(struct archive_rb_tree *,
+ struct archive_rb_node *);
+struct archive_rb_node *
+ __archive_rb_tree_find_node(struct archive_rb_tree *, const void *);
+struct archive_rb_node *
+ __archive_rb_tree_find_node_geq(struct archive_rb_tree *, const void *);
+struct archive_rb_node *
+ __archive_rb_tree_find_node_leq(struct archive_rb_tree *, const void *);
+void __archive_rb_tree_remove_node(struct archive_rb_tree *, struct archive_rb_node *);
+struct archive_rb_node *
+ __archive_rb_tree_iterate(struct archive_rb_tree *,
+ struct archive_rb_node *, const unsigned int);
+
+#endif /* ARCHIVE_RB_H_*/