1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
27 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
28 #error "Only <glib.h> can be included directly."
34 #include <glib/gmem.h>
38 typedef struct _GNode GNode;
40 /* Tree traverse flags */
43 G_TRAVERSE_LEAVES = 1 << 0,
44 G_TRAVERSE_NON_LEAVES = 1 << 1,
45 G_TRAVERSE_ALL = G_TRAVERSE_LEAVES | G_TRAVERSE_NON_LEAVES,
46 G_TRAVERSE_MASK = 0x03,
47 G_TRAVERSE_LEAFS = G_TRAVERSE_LEAVES,
48 G_TRAVERSE_NON_LEAFS = G_TRAVERSE_NON_LEAVES
51 /* Tree traverse orders */
60 typedef gboolean (*GNodeTraverseFunc) (GNode *node,
62 typedef void (*GNodeForeachFunc) (GNode *node,
67 * @src: A pointer to the data which should be copied
68 * @data: Additional data
70 * A function of this signature is used to copy the node data
71 * when doing a deep-copy of a tree.
73 * Returns: A pointer to the copy
77 typedef gpointer (*GCopyFunc) (gconstpointer src,
80 /* N-way tree implementation
95 * Returns %TRUE if a #GNode is the root of a tree.
97 * Returns: %TRUE if the #GNode is the root of a tree
98 * (i.e. it has no parent or siblings)
100 #define G_NODE_IS_ROOT(node) (((GNode*) (node))->parent == NULL && \
101 ((GNode*) (node))->prev == NULL && \
102 ((GNode*) (node))->next == NULL)
108 * Returns %TRUE if a #GNode is a leaf node.
110 * Returns: %TRUE if the #GNode is a leaf node
111 * (i.e. it has no children)
113 #define G_NODE_IS_LEAF(node) (((GNode*) (node))->children == NULL)
115 GNode* g_node_new (gpointer data);
116 void g_node_destroy (GNode *root);
117 void g_node_unlink (GNode *node);
118 GNode* g_node_copy_deep (GNode *node,
121 GNode* g_node_copy (GNode *node);
122 GNode* g_node_insert (GNode *parent,
125 GNode* g_node_insert_before (GNode *parent,
128 GNode* g_node_insert_after (GNode *parent,
131 GNode* g_node_prepend (GNode *parent,
133 guint g_node_n_nodes (GNode *root,
134 GTraverseFlags flags);
135 GNode* g_node_get_root (GNode *node);
136 gboolean g_node_is_ancestor (GNode *node,
138 guint g_node_depth (GNode *node);
139 GNode* g_node_find (GNode *root,
141 GTraverseFlags flags,
144 /* convenience macros */
147 * @parent: the #GNode to place the new #GNode under
148 * @node: the #GNode to insert
150 * Inserts a #GNode as the last child of the given parent.
152 * Returns: the inserted #GNode
154 #define g_node_append(parent, node) \
155 g_node_insert_before ((parent), NULL, (node))
158 * g_node_insert_data:
159 * @parent: the #GNode to place the new #GNode under
160 * @position: the position to place the new #GNode at. If position is -1,
161 * the new #GNode is inserted as the last child of @parent
162 * @data: the data for the new #GNode
164 * Inserts a new #GNode at the given position.
166 * Returns: the new #GNode
168 #define g_node_insert_data(parent, position, data) \
169 g_node_insert ((parent), (position), g_node_new (data))
172 * g_node_insert_data_before:
173 * @parent: the #GNode to place the new #GNode under
174 * @sibling: the sibling #GNode to place the new #GNode before
175 * @data: the data for the new #GNode
177 * Inserts a new #GNode before the given sibling.
179 * Returns: the new #GNode
181 #define g_node_insert_data_before(parent, sibling, data) \
182 g_node_insert_before ((parent), (sibling), g_node_new (data))
185 * g_node_prepend_data:
186 * @parent: the #GNode to place the new #GNode under
187 * @data: the data for the new #GNode
189 * Inserts a new #GNode as the first child of the given parent.
191 * Returns: the new #GNode
193 #define g_node_prepend_data(parent, data) \
194 g_node_prepend ((parent), g_node_new (data))
197 * g_node_append_data:
198 * @parent: the #GNode to place the new #GNode under
199 * @data: the data for the new #GNode
201 * Inserts a new #GNode as the last child of the given parent.
203 * Returns: the new #GNode
205 #define g_node_append_data(parent, data) \
206 g_node_insert_before ((parent), NULL, g_node_new (data))
208 /* traversal function, assumes that `node' is root
209 * (only traverses `node' and its subtree).
210 * this function is just a high level interface to
211 * low level traversal functions, optimized for speed.
213 void g_node_traverse (GNode *root,
215 GTraverseFlags flags,
217 GNodeTraverseFunc func,
220 /* return the maximum tree height starting with `node', this is an expensive
221 * operation, since we need to visit all nodes. this could be shortened by
222 * adding `guint height' to struct _GNode, but then again, this is not very
223 * often needed, and would make g_node_insert() more time consuming.
225 guint g_node_max_height (GNode *root);
227 void g_node_children_foreach (GNode *node,
228 GTraverseFlags flags,
229 GNodeForeachFunc func,
231 void g_node_reverse_children (GNode *node);
232 guint g_node_n_children (GNode *node);
233 GNode* g_node_nth_child (GNode *node,
235 GNode* g_node_last_child (GNode *node);
236 GNode* g_node_find_child (GNode *node,
237 GTraverseFlags flags,
239 gint g_node_child_position (GNode *node,
241 gint g_node_child_index (GNode *node,
244 GNode* g_node_first_sibling (GNode *node);
245 GNode* g_node_last_sibling (GNode *node);
248 * g_node_prev_sibling:
251 * Gets the previous sibling of a #GNode.
253 * Returns: the previous sibling of @node, or %NULL if @node is %NULL
255 #define g_node_prev_sibling(node) ((node) ? \
256 ((GNode*) (node))->prev : NULL)
259 * g_node_next_sibling:
262 * Gets the next sibling of a #GNode.
264 * Returns: the next sibling of @node, or %NULL if @node is %NULL
266 #define g_node_next_sibling(node) ((node) ? \
267 ((GNode*) (node))->next : NULL)
270 * g_node_first_child:
273 * Gets the first child of a #GNode.
275 * Returns: the first child of @node, or %NULL if @node is %NULL
278 #define g_node_first_child(node) ((node) ? \
279 ((GNode*) (node))->children : NULL)
281 #ifndef G_DISABLE_DEPRECATED
282 void g_node_push_allocator (gpointer dummy);
283 void g_node_pop_allocator (void);
288 #endif /* __G_NODE_H__ */