mirror of https://gitee.com/openkylin/glib2.0.git
310 lines
8.6 KiB
C
310 lines
8.6 KiB
C
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#ifndef __G_NODE_H__
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#define __G_NODE_H__
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#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
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#error "Only <glib.h> can be included directly."
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#endif
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#include <glib/gmem.h>
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G_BEGIN_DECLS
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typedef struct _GNode GNode;
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/* Tree traverse flags */
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typedef enum
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{
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G_TRAVERSE_LEAVES = 1 << 0,
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G_TRAVERSE_NON_LEAVES = 1 << 1,
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G_TRAVERSE_ALL = G_TRAVERSE_LEAVES | G_TRAVERSE_NON_LEAVES,
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G_TRAVERSE_MASK = 0x03,
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G_TRAVERSE_LEAFS = G_TRAVERSE_LEAVES,
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G_TRAVERSE_NON_LEAFS = G_TRAVERSE_NON_LEAVES
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} GTraverseFlags;
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/* Tree traverse orders */
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typedef enum
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{
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G_IN_ORDER,
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G_PRE_ORDER,
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G_POST_ORDER,
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G_LEVEL_ORDER
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} GTraverseType;
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typedef gboolean (*GNodeTraverseFunc) (GNode *node,
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gpointer user_data);
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typedef void (*GNodeForeachFunc) (GNode *node,
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gpointer user_data);
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/* N-way tree implementation
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*/
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struct _GNode
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{
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gpointer data;
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GNode *next;
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GNode *prev;
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GNode *parent;
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GNode *children;
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};
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/**
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* G_NODE_IS_ROOT:
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* @node: a #GNode
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*
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* Returns %TRUE if a #GNode is the root of a tree.
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*
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* Returns: %TRUE if the #GNode is the root of a tree
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* (i.e. it has no parent or siblings)
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*/
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#define G_NODE_IS_ROOT(node) (((GNode*) (node))->parent == NULL && \
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((GNode*) (node))->prev == NULL && \
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((GNode*) (node))->next == NULL)
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/**
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* G_NODE_IS_LEAF:
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* @node: a #GNode
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*
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* Returns %TRUE if a #GNode is a leaf node.
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*
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* Returns: %TRUE if the #GNode is a leaf node
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* (i.e. it has no children)
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*/
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#define G_NODE_IS_LEAF(node) (((GNode*) (node))->children == NULL)
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_new (gpointer data);
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GLIB_AVAILABLE_IN_ALL
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void g_node_destroy (GNode *root);
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GLIB_AVAILABLE_IN_ALL
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void g_node_unlink (GNode *node);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_copy_deep (GNode *node,
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GCopyFunc copy_func,
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gpointer data);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_copy (GNode *node);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_insert (GNode *parent,
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gint position,
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GNode *node);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_insert_before (GNode *parent,
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GNode *sibling,
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GNode *node);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_insert_after (GNode *parent,
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GNode *sibling,
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GNode *node);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_prepend (GNode *parent,
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GNode *node);
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GLIB_AVAILABLE_IN_ALL
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guint g_node_n_nodes (GNode *root,
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GTraverseFlags flags);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_get_root (GNode *node);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_node_is_ancestor (GNode *node,
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GNode *descendant);
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GLIB_AVAILABLE_IN_ALL
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guint g_node_depth (GNode *node);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_find (GNode *root,
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GTraverseType order,
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GTraverseFlags flags,
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gpointer data);
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/* convenience macros */
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/**
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* g_node_append:
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* @parent: the #GNode to place the new #GNode under
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* @node: the #GNode to insert
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*
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* Inserts a #GNode as the last child of the given parent.
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*
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* Returns: the inserted #GNode
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*/
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#define g_node_append(parent, node) \
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g_node_insert_before ((parent), NULL, (node))
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/**
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* g_node_insert_data:
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* @parent: the #GNode to place the new #GNode under
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* @position: the position to place the new #GNode at. If position is -1,
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* the new #GNode is inserted as the last child of @parent
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* @data: the data for the new #GNode
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*
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* Inserts a new #GNode at the given position.
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*
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* Returns: the new #GNode
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*/
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#define g_node_insert_data(parent, position, data) \
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g_node_insert ((parent), (position), g_node_new (data))
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/**
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* g_node_insert_data_after:
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* @parent: the #GNode to place the new #GNode under
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* @sibling: the sibling #GNode to place the new #GNode after
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* @data: the data for the new #GNode
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*
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* Inserts a new #GNode after the given sibling.
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*
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* Returns: the new #GNode
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*/
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#define g_node_insert_data_after(parent, sibling, data) \
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g_node_insert_after ((parent), (sibling), g_node_new (data))
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/**
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* g_node_insert_data_before:
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* @parent: the #GNode to place the new #GNode under
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* @sibling: the sibling #GNode to place the new #GNode before
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* @data: the data for the new #GNode
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*
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* Inserts a new #GNode before the given sibling.
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*
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* Returns: the new #GNode
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*/
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#define g_node_insert_data_before(parent, sibling, data) \
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g_node_insert_before ((parent), (sibling), g_node_new (data))
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/**
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* g_node_prepend_data:
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* @parent: the #GNode to place the new #GNode under
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* @data: the data for the new #GNode
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*
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* Inserts a new #GNode as the first child of the given parent.
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*
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* Returns: the new #GNode
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*/
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#define g_node_prepend_data(parent, data) \
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g_node_prepend ((parent), g_node_new (data))
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/**
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* g_node_append_data:
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* @parent: the #GNode to place the new #GNode under
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* @data: the data for the new #GNode
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*
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* Inserts a new #GNode as the last child of the given parent.
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*
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* Returns: the new #GNode
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*/
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#define g_node_append_data(parent, data) \
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g_node_insert_before ((parent), NULL, g_node_new (data))
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/* traversal function, assumes that 'node' is root
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* (only traverses 'node' and its subtree).
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* this function is just a high level interface to
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* low level traversal functions, optimized for speed.
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*/
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GLIB_AVAILABLE_IN_ALL
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void g_node_traverse (GNode *root,
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GTraverseType order,
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GTraverseFlags flags,
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gint max_depth,
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GNodeTraverseFunc func,
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gpointer data);
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/* return the maximum tree height starting with 'node', this is an expensive
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* operation, since we need to visit all nodes. this could be shortened by
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* adding 'guint height' to struct _GNode, but then again, this is not very
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* often needed, and would make g_node_insert() more time consuming.
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*/
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GLIB_AVAILABLE_IN_ALL
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guint g_node_max_height (GNode *root);
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GLIB_AVAILABLE_IN_ALL
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void g_node_children_foreach (GNode *node,
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GTraverseFlags flags,
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GNodeForeachFunc func,
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gpointer data);
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GLIB_AVAILABLE_IN_ALL
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void g_node_reverse_children (GNode *node);
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GLIB_AVAILABLE_IN_ALL
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guint g_node_n_children (GNode *node);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_nth_child (GNode *node,
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guint n);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_last_child (GNode *node);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_find_child (GNode *node,
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GTraverseFlags flags,
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gpointer data);
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GLIB_AVAILABLE_IN_ALL
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gint g_node_child_position (GNode *node,
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GNode *child);
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GLIB_AVAILABLE_IN_ALL
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gint g_node_child_index (GNode *node,
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gpointer data);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_first_sibling (GNode *node);
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GLIB_AVAILABLE_IN_ALL
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GNode* g_node_last_sibling (GNode *node);
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/**
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* g_node_prev_sibling:
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* @node: a #GNode
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*
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* Gets the previous sibling of a #GNode.
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*
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* Returns: the previous sibling of @node, or %NULL if @node is the first
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* node or %NULL
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*/
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#define g_node_prev_sibling(node) ((node) ? \
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((GNode*) (node))->prev : NULL)
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/**
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* g_node_next_sibling:
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* @node: a #GNode
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*
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* Gets the next sibling of a #GNode.
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*
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* Returns: the next sibling of @node, or %NULL if @node is the last node
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* or %NULL
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*/
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#define g_node_next_sibling(node) ((node) ? \
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((GNode*) (node))->next : NULL)
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/**
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* g_node_first_child:
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* @node: a #GNode
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*
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* Gets the first child of a #GNode.
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*
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* Returns: the first child of @node, or %NULL if @node is %NULL
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* or has no children
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*/
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#define g_node_first_child(node) ((node) ? \
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((GNode*) (node))->children : NULL)
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G_END_DECLS
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#endif /* __G_NODE_H__ */
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