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added new function g_tree_lookup_extended().
2001-03-08 Sven Neumann <sven@gimp.org> * gtree.[ch]: * docs/reference/glib/tmpl/trees-binary.sgml: added new function g_tree_lookup_extended().
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Sven Neumann
Sven Neumann
parent
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commit
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@ -1,3 +1,9 @@
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2001-03-08 Sven Neumann <sven@gimp.org>
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* gtree.[ch]:
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* docs/reference/glib/tmpl/trees-binary.sgml: added new function
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g_tree_lookup_extended().
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Thu Mar 8 16:23:34 2001 Tim Janik <timj@gtk.org>
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* ghook.[hc]: destruction cleanup. there's one
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@ -1,3 +1,9 @@
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2001-03-08 Sven Neumann <sven@gimp.org>
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* gtree.[ch]:
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* docs/reference/glib/tmpl/trees-binary.sgml: added new function
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g_tree_lookup_extended().
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Thu Mar 8 16:23:34 2001 Tim Janik <timj@gtk.org>
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* ghook.[hc]: destruction cleanup. there's one
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@ -1,3 +1,9 @@
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2001-03-08 Sven Neumann <sven@gimp.org>
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* gtree.[ch]:
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* docs/reference/glib/tmpl/trees-binary.sgml: added new function
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g_tree_lookup_extended().
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Thu Mar 8 16:23:34 2001 Tim Janik <timj@gtk.org>
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* ghook.[hc]: destruction cleanup. there's one
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@ -1,3 +1,9 @@
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2001-03-08 Sven Neumann <sven@gimp.org>
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* gtree.[ch]:
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* docs/reference/glib/tmpl/trees-binary.sgml: added new function
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g_tree_lookup_extended().
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Thu Mar 8 16:23:34 2001 Tim Janik <timj@gtk.org>
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* ghook.[hc]: destruction cleanup. there's one
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@ -1,3 +1,9 @@
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2001-03-08 Sven Neumann <sven@gimp.org>
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* gtree.[ch]:
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* docs/reference/glib/tmpl/trees-binary.sgml: added new function
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g_tree_lookup_extended().
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Thu Mar 8 16:23:34 2001 Tim Janik <timj@gtk.org>
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* ghook.[hc]: destruction cleanup. there's one
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@ -1,3 +1,9 @@
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2001-03-08 Sven Neumann <sven@gimp.org>
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* gtree.[ch]:
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* docs/reference/glib/tmpl/trees-binary.sgml: added new function
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g_tree_lookup_extended().
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Thu Mar 8 16:23:34 2001 Tim Janik <timj@gtk.org>
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* ghook.[hc]: destruction cleanup. there's one
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@ -1,3 +1,9 @@
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2001-03-08 Sven Neumann <sven@gimp.org>
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* gtree.[ch]:
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* docs/reference/glib/tmpl/trees-binary.sgml: added new function
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g_tree_lookup_extended().
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Thu Mar 8 16:23:34 2001 Tim Janik <timj@gtk.org>
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* ghook.[hc]: destruction cleanup. there's one
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@ -1,3 +1,9 @@
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2001-03-08 Sven Neumann <sven@gimp.org>
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* gtree.[ch]:
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* docs/reference/glib/tmpl/trees-binary.sgml: added new function
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g_tree_lookup_extended().
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Thu Mar 8 16:23:34 2001 Tim Janik <timj@gtk.org>
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* ghook.[hc]: destruction cleanup. there's one
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@ -17,7 +17,8 @@ To create a new #GTree use g_tree_new().
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To insert a key/value pair into a #GTree use g_tree_insert().
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</para>
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<para>
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To lookup the value corresponding to a given key, use g_tree_lookup().
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To lookup the value corresponding to a given key, use g_tree_lookup() and
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g_tree_lookup_extended().
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</para>
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<para>
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To find out the number of nodes in a #GTree, use g_tree_nnodes().
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@ -123,6 +124,22 @@ added, key lookup is very fast.
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@Returns: the value corresponding to the key.
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<!-- ##### FUNCTION g_tree_lookup_extended ##### -->
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<para>
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Gets the original key and the associated value and a gboolean which is
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TRUE if the key was found. This is useful if you need to free the memory
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allocated for the original key, for example before calling g_tree_remove().
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Since a #GTree is automatically balanced as key/value pairs are added,
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key lookup is very fast.
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</para>
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@tree: a #GTree.
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@lookup_key: the key to look up.
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@orig_key: returns the original key.
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@value: returns the value associated with the key.
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@Returns: TRUE if the key was found in the #GTree.
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<!-- ##### FUNCTION g_tree_search ##### -->
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<para>
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Searches a #GTree using an alternative form of the comparison function.
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30
glib/gtree.c
30
glib/gtree.c
@ -238,6 +238,36 @@ g_tree_lookup (GTree *tree,
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rtree->key_compare_data, key);
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}
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gboolean
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g_tree_lookup_extended (GTree *tree,
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gconstpointer lookup_key,
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gpointer *orig_key,
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gpointer *value)
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{
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GRealTree *rtree;
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GTreeNode *node;
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g_return_val_if_fail (tree != NULL, FALSE);
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rtree = (GRealTree*) tree;
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node = g_tree_node_lookup (rtree->root,
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rtree->key_compare,
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rtree->key_compare_data,
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lookup_key);
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if (node)
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{
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if (orig_key)
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*orig_key = node->key;
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if (value)
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*value = node->value;
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return TRUE;
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}
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else
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return FALSE;
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}
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void
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g_tree_traverse (GTree *tree,
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GTraverseFunc traverse_func,
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52
glib/gtree.h
52
glib/gtree.h
@ -31,34 +31,38 @@
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G_BEGIN_DECLS
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typedef struct _GTree GTree;
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typedef struct _GTree GTree;
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typedef gint (*GTraverseFunc) (gpointer key,
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gpointer value,
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gpointer data);
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typedef gint (*GTraverseFunc) (gpointer key,
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gpointer value,
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gpointer data);
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/* Balanced binary trees
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*/
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GTree* g_tree_new (GCompareFunc key_compare_func);
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GTree* g_tree_new_with_data (GCompareDataFunc key_compare_func,
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gpointer user_data);
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void g_tree_destroy (GTree *tree);
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void g_tree_insert (GTree *tree,
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gpointer key,
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gpointer value);
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void g_tree_remove (GTree *tree,
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gconstpointer key);
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gpointer g_tree_lookup (GTree *tree,
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gconstpointer key);
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void g_tree_traverse (GTree *tree,
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GTraverseFunc traverse_func,
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GTraverseType traverse_type,
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gpointer data);
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gpointer g_tree_search (GTree *tree,
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GCompareFunc search_func,
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gconstpointer data);
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gint g_tree_height (GTree *tree);
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gint g_tree_nnodes (GTree *tree);
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GTree* g_tree_new (GCompareFunc key_compare_func);
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GTree* g_tree_new_with_data (GCompareDataFunc key_compare_func,
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gpointer user_data);
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void g_tree_destroy (GTree *tree);
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void g_tree_insert (GTree *tree,
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gpointer key,
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gpointer value);
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void g_tree_remove (GTree *tree,
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gconstpointer key);
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gpointer g_tree_lookup (GTree *tree,
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gconstpointer key);
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gboolean g_tree_lookup_extended (GTree *tree,
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gconstpointer lookup_key,
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gpointer *orig_key,
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gpointer *value);
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void g_tree_traverse (GTree *tree,
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GTraverseFunc traverse_func,
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GTraverseType traverse_type,
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gpointer data);
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gpointer g_tree_search (GTree *tree,
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GCompareFunc search_func,
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gconstpointer data);
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gint g_tree_height (GTree *tree);
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gint g_tree_nnodes (GTree *tree);
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30
gtree.c
30
gtree.c
@ -238,6 +238,36 @@ g_tree_lookup (GTree *tree,
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rtree->key_compare_data, key);
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}
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gboolean
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g_tree_lookup_extended (GTree *tree,
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gconstpointer lookup_key,
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gpointer *orig_key,
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gpointer *value)
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{
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GRealTree *rtree;
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GTreeNode *node;
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g_return_val_if_fail (tree != NULL, FALSE);
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rtree = (GRealTree*) tree;
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node = g_tree_node_lookup (rtree->root,
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rtree->key_compare,
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rtree->key_compare_data,
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lookup_key);
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if (node)
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{
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if (orig_key)
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*orig_key = node->key;
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if (value)
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*value = node->value;
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return TRUE;
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}
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else
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return FALSE;
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}
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void
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g_tree_traverse (GTree *tree,
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GTraverseFunc traverse_func,
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52
gtree.h
52
gtree.h
@ -31,34 +31,38 @@
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G_BEGIN_DECLS
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typedef struct _GTree GTree;
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typedef struct _GTree GTree;
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typedef gint (*GTraverseFunc) (gpointer key,
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gpointer value,
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gpointer data);
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typedef gint (*GTraverseFunc) (gpointer key,
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gpointer value,
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gpointer data);
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/* Balanced binary trees
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*/
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GTree* g_tree_new (GCompareFunc key_compare_func);
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GTree* g_tree_new_with_data (GCompareDataFunc key_compare_func,
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gpointer user_data);
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void g_tree_destroy (GTree *tree);
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void g_tree_insert (GTree *tree,
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gpointer key,
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gpointer value);
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void g_tree_remove (GTree *tree,
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gconstpointer key);
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gpointer g_tree_lookup (GTree *tree,
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gconstpointer key);
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void g_tree_traverse (GTree *tree,
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GTraverseFunc traverse_func,
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GTraverseType traverse_type,
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gpointer data);
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gpointer g_tree_search (GTree *tree,
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GCompareFunc search_func,
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gconstpointer data);
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gint g_tree_height (GTree *tree);
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gint g_tree_nnodes (GTree *tree);
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GTree* g_tree_new (GCompareFunc key_compare_func);
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GTree* g_tree_new_with_data (GCompareDataFunc key_compare_func,
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gpointer user_data);
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void g_tree_destroy (GTree *tree);
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void g_tree_insert (GTree *tree,
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gpointer key,
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gpointer value);
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void g_tree_remove (GTree *tree,
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gconstpointer key);
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gpointer g_tree_lookup (GTree *tree,
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gconstpointer key);
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gboolean g_tree_lookup_extended (GTree *tree,
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gconstpointer lookup_key,
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gpointer *orig_key,
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gpointer *value);
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void g_tree_traverse (GTree *tree,
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GTraverseFunc traverse_func,
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GTraverseType traverse_type,
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gpointer data);
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gpointer g_tree_search (GTree *tree,
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GCompareFunc search_func,
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gconstpointer data);
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gint g_tree_height (GTree *tree);
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gint g_tree_nnodes (GTree *tree);
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