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authormartin-s <martin-s@ffa7fe5e-494d-0410-b361-a75ebd5db220>2009-07-30 20:34:23 +0000
committermartin-s <martin-s@ffa7fe5e-494d-0410-b361-a75ebd5db220>2009-07-30 20:34:23 +0000
commitd72782347c2ba802cd030feeb23f7eacc4ae8a23 (patch)
treea729476323d0d551c2031b3a666193923ceb08a4 /support/glib/ghash.c
parentc297ef7f5928b0407ab67b9a76ccf166d0a1d3e0 (diff)
parent3b8435d744c504a88493f272068453023585837e (diff)
downloadnavit-svn-wince.tar.gz
Updated wince branch to current versionwince
git-svn-id: http://svn.code.sf.net/p/navit/code/branches/wince/navit@2430 ffa7fe5e-494d-0410-b361-a75ebd5db220
Diffstat (limited to 'support/glib/ghash.c')
-rw-r--r--support/glib/ghash.c1202
1 files changed, 1202 insertions, 0 deletions
diff --git a/support/glib/ghash.c b/support/glib/ghash.c
new file mode 100644
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+++ b/support/glib/ghash.c
@@ -0,0 +1,1202 @@
+/* GLIB - Library of useful routines for C programming
+ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Modified by the GLib Team and others 1997-2000. See the AUTHORS
+ * file for a list of people on the GLib Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GLib at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
+/*
+ * MT safe
+ */
+
+#include "config.h"
+
+#include "glib.h"
+#include "galias.h"
+
+
+#define HASH_TABLE_MIN_SIZE 11
+#define HASH_TABLE_MAX_SIZE 13845163
+
+
+typedef struct _GHashNode GHashNode;
+
+struct _GHashNode
+{
+ gpointer key;
+ gpointer value;
+ GHashNode *next;
+ guint key_hash;
+};
+
+struct _GHashTable
+{
+ gint size;
+ gint nnodes;
+ GHashNode **nodes;
+ GHashFunc hash_func;
+ GEqualFunc key_equal_func;
+ volatile gint ref_count;
+#ifndef G_DISABLE_ASSERT
+ /*
+ * Tracks the structure of the hash table, not its contents: is only
+ * incremented when a node is added or removed (is not incremented
+ * when the key or data of a node is modified).
+ */
+ int version;
+#endif
+ GDestroyNotify key_destroy_func;
+ GDestroyNotify value_destroy_func;
+};
+
+typedef struct
+{
+ GHashTable *hash_table;
+ GHashNode *prev_node;
+ GHashNode *node;
+ int position;
+ gboolean pre_advanced;
+ int version;
+} RealIter;
+
+/*
+ * g_hash_table_lookup_node:
+ * @hash_table: our #GHashTable
+ * @key: the key to lookup against
+ * @hash_return: optional key hash return location
+ * Return value: a pointer to the described #GHashNode pointer
+ *
+ * Performs a lookup in the hash table. Virtually all hash operations
+ * will use this function internally.
+ *
+ * This function first computes the hash value of the key using the
+ * user's hash function.
+ *
+ * If an entry in the table matching @key is found then this function
+ * returns a pointer to the pointer to that entry in the table. In
+ * the case that the entry is at the head of a chain, this pointer
+ * will be an item in the nodes[] array. In the case that the entry
+ * is not at the head of a chain, this pointer will be the ->next
+ * pointer on the node that preceeds it.
+ *
+ * In the case that no matching entry exists in the table, a pointer
+ * to a %NULL pointer will be returned. To insert a item, this %NULL
+ * pointer should be updated to point to the new #GHashNode.
+ *
+ * If @hash_return is a pass-by-reference parameter. If it is
+ * non-%NULL then the computed hash value is returned. This is to
+ * save insertions from having to compute the hash record again for
+ * the new record.
+ */
+static inline GHashNode **
+g_hash_table_lookup_node (GHashTable *hash_table,
+ gconstpointer key,
+ guint *hash_return)
+{
+ GHashNode **node_ptr, *node;
+ guint hash_value;
+
+ hash_value = (* hash_table->hash_func) (key);
+ node_ptr = &hash_table->nodes[hash_value % hash_table->size];
+
+ if (hash_return)
+ *hash_return = hash_value;
+
+ /* Hash table lookup needs to be fast.
+ * We therefore remove the extra conditional of testing
+ * whether to call the key_equal_func or not from
+ * the inner loop.
+ *
+ * Additional optimisation: first check if our full hash
+ * values are equal so we can avoid calling the full-blown
+ * key equality function in most cases.
+ */
+ if (hash_table->key_equal_func)
+ {
+ while ((node = *node_ptr))
+ {
+ if (node->key_hash == hash_value &&
+ hash_table->key_equal_func (node->key, key))
+ break;
+
+ node_ptr = &(*node_ptr)->next;
+ }
+ }
+ else
+ {
+ while ((node = *node_ptr))
+ {
+ if (node->key == key)
+ break;
+
+ node_ptr = &(*node_ptr)->next;
+ }
+ }
+
+ return node_ptr;
+}
+
+/*
+ * g_hash_table_remove_node:
+ * @hash_table: our #GHashTable
+ * @node_ptr_ptr: a pointer to the return value from
+ * g_hash_table_lookup_node()
+ * @notify: %TRUE if the destroy notify handlers are to be called
+ *
+ * Removes a node from the hash table and updates the node count. The
+ * node is freed. No table resize is performed.
+ *
+ * If @notify is %TRUE then the destroy notify functions are called
+ * for the key and value of the hash node.
+ *
+ * @node_ptr_ptr is a pass-by-reference in/out parameter. When the
+ * function is called, it should point to the pointer to the node to
+ * remove. This level of indirection is required so that the pointer
+ * may be updated appropriately once the node has been removed.
+ *
+ * Before the function returns, the pointer at @node_ptr_ptr will be
+ * updated to point to the position in the table that contains the
+ * pointer to the "next" node in the chain. This makes this function
+ * convenient to use from functions that iterate over the entire
+ * table. If there is no further item in the chain then the
+ * #GHashNode pointer will be %NULL (ie: **node_ptr_ptr == %NULL).
+ *
+ * Since the pointer in the table to the removed node is replaced with
+ * either a pointer to the next node or a %NULL pointer as
+ * appropriate, the pointer at the end of @node_ptr_ptr will never be
+ * modified at all. Stay tuned. :)
+ */
+static void
+g_hash_table_remove_node (GHashTable *hash_table,
+ GHashNode ***node_ptr_ptr,
+ gboolean notify)
+{
+ GHashNode **node_ptr, *node;
+
+ node_ptr = *node_ptr_ptr;
+ node = *node_ptr;
+
+ *node_ptr = node->next;
+
+ if (notify && hash_table->key_destroy_func)
+ hash_table->key_destroy_func (node->key);
+
+ if (notify && hash_table->value_destroy_func)
+ hash_table->value_destroy_func (node->value);
+
+ g_slice_free (GHashNode, node);
+
+ hash_table->nnodes--;
+}
+
+/*
+ * g_hash_table_remove_all_nodes:
+ * @hash_table: our #GHashTable
+ * @notify: %TRUE if the destroy notify handlers are to be called
+ *
+ * Removes all nodes from the table. Since this may be a precursor to
+ * freeing the table entirely, no resize is performed.
+ *
+ * If @notify is %TRUE then the destroy notify functions are called
+ * for the key and value of the hash node.
+ */
+static void
+g_hash_table_remove_all_nodes (GHashTable *hash_table,
+ gboolean notify)
+{
+ GHashNode **node_ptr;
+ int i;
+
+ for (i = 0; i < hash_table->size; i++)
+ for (node_ptr = &hash_table->nodes[i]; *node_ptr != NULL;)
+ g_hash_table_remove_node (hash_table, &node_ptr, notify);
+
+ hash_table->nnodes = 0;
+}
+
+/*
+ * g_hash_table_resize:
+ * @hash_table: our #GHashTable
+ *
+ * Resizes the hash table to the optimal size based on the number of
+ * nodes currently held. If you call this function then a resize will
+ * occur, even if one does not need to occur. Use
+ * g_hash_table_maybe_resize() instead.
+ */
+static void
+g_hash_table_resize (GHashTable *hash_table)
+{
+ GHashNode **new_nodes;
+ GHashNode *node;
+ GHashNode *next;
+ guint hash_val;
+ gint new_size;
+ gint i;
+
+ new_size = g_spaced_primes_closest (hash_table->nnodes);
+ new_size = CLAMP (new_size, HASH_TABLE_MIN_SIZE, HASH_TABLE_MAX_SIZE);
+
+ new_nodes = g_new0 (GHashNode*, new_size);
+
+ for (i = 0; i < hash_table->size; i++)
+ for (node = hash_table->nodes[i]; node; node = next)
+ {
+ next = node->next;
+
+ hash_val = node->key_hash % new_size;
+
+ node->next = new_nodes[hash_val];
+ new_nodes[hash_val] = node;
+ }
+
+ g_free (hash_table->nodes);
+ hash_table->nodes = new_nodes;
+ hash_table->size = new_size;
+}
+
+/*
+ * g_hash_table_maybe_resize:
+ * @hash_table: our #GHashTable
+ *
+ * Resizes the hash table, if needed.
+ *
+ * Essentially, calls g_hash_table_resize() if the table has strayed
+ * too far from its ideal size for its number of nodes.
+ */
+static inline void
+g_hash_table_maybe_resize (GHashTable *hash_table)
+{
+ gint nnodes = hash_table->nnodes;
+ gint size = hash_table->size;
+
+ if ((size >= 3 * nnodes && size > HASH_TABLE_MIN_SIZE) ||
+ (3 * size <= nnodes && size < HASH_TABLE_MAX_SIZE))
+ g_hash_table_resize (hash_table);
+}
+
+/**
+ * g_hash_table_new:
+ * @hash_func: a function to create a hash value from a key.
+ * Hash values are used to determine where keys are stored within the
+ * #GHashTable data structure. The g_direct_hash(), g_int_hash() and
+ * g_str_hash() functions are provided for some common types of keys.
+ * If hash_func is %NULL, g_direct_hash() is used.
+ * @key_equal_func: a function to check two keys for equality. This is
+ * used when looking up keys in the #GHashTable. The g_direct_equal(),
+ * g_int_equal() and g_str_equal() functions are provided for the most
+ * common types of keys. If @key_equal_func is %NULL, keys are compared
+ * directly in a similar fashion to g_direct_equal(), but without the
+ * overhead of a function call.
+ *
+ * Creates a new #GHashTable with a reference count of 1.
+ *
+ * Return value: a new #GHashTable.
+ **/
+GHashTable*
+g_hash_table_new (GHashFunc hash_func,
+ GEqualFunc key_equal_func)
+{
+ return g_hash_table_new_full (hash_func, key_equal_func, NULL, NULL);
+}
+
+
+/**
+ * g_hash_table_new_full:
+ * @hash_func: a function to create a hash value from a key.
+ * @key_equal_func: a function to check two keys for equality.
+ * @key_destroy_func: a function to free the memory allocated for the key
+ * used when removing the entry from the #GHashTable or %NULL if you
+ * don't want to supply such a function.
+ * @value_destroy_func: a function to free the memory allocated for the
+ * value used when removing the entry from the #GHashTable or %NULL if
+ * you don't want to supply such a function.
+ *
+ * Creates a new #GHashTable like g_hash_table_new() with a reference count
+ * of 1 and allows to specify functions to free the memory allocated for the
+ * key and value that get called when removing the entry from the #GHashTable.
+ *
+ * Return value: a new #GHashTable.
+ **/
+GHashTable*
+g_hash_table_new_full (GHashFunc hash_func,
+ GEqualFunc key_equal_func,
+ GDestroyNotify key_destroy_func,
+ GDestroyNotify value_destroy_func)
+{
+ GHashTable *hash_table;
+
+ hash_table = g_slice_new (GHashTable);
+ hash_table->size = HASH_TABLE_MIN_SIZE;
+ hash_table->nnodes = 0;
+ hash_table->hash_func = hash_func ? hash_func : g_direct_hash;
+ hash_table->key_equal_func = key_equal_func;
+ hash_table->ref_count = 1;
+#ifndef G_DISABLE_ASSERT
+ hash_table->version = 0;
+#endif
+ hash_table->key_destroy_func = key_destroy_func;
+ hash_table->value_destroy_func = value_destroy_func;
+ hash_table->nodes = g_new0 (GHashNode*, hash_table->size);
+
+ return hash_table;
+}
+
+/**
+ * g_hash_table_iter_init:
+ * @iter: an uninitialized #GHashTableIter.
+ * @hash_table: a #GHashTable.
+ *
+ * Initializes a key/value pair iterator and associates it with
+ * @hash_table. Modifying the hash table after calling this function
+ * invalidates the returned iterator.
+ * |[
+ * GHashTableIter iter;
+ * gpointer key, value;
+ *
+ * g_hash_table_iter_init (&iter, hash_table);
+ * while (g_hash_table_iter_next (&iter, &key, &value))
+ * {
+ * /&ast; do something with key and value &ast;/
+ * }
+ * ]|
+ *
+ * Since: 2.16
+ **/
+void
+g_hash_table_iter_init (GHashTableIter *iter,
+ GHashTable *hash_table)
+{
+ RealIter *ri = (RealIter *) iter;
+
+ g_return_if_fail (iter != NULL);
+ g_return_if_fail (hash_table != NULL);
+
+ ri->hash_table = hash_table;
+ ri->prev_node = NULL;
+ ri->node = NULL;
+ ri->position = -1;
+ ri->pre_advanced = FALSE;
+#ifndef G_DISABLE_ASSERT
+ ri->version = hash_table->version;
+#endif
+}
+
+/**
+ * g_hash_table_iter_next:
+ * @iter: an initialized #GHashTableIter.
+ * @key: a location to store the key, or %NULL.
+ * @value: a location to store the value, or %NULL.
+ *
+ * Advances @iter and retrieves the key and/or value that are now
+ * pointed to as a result of this advancement. If %FALSE is returned,
+ * @key and @value are not set, and the iterator becomes invalid.
+ *
+ * Return value: %FALSE if the end of the #GHashTable has been reached.
+ *
+ * Since: 2.16
+ **/
+gboolean
+g_hash_table_iter_next (GHashTableIter *iter,
+ gpointer *key,
+ gpointer *value)
+{
+ RealIter *ri = (RealIter *) iter;
+
+ g_return_val_if_fail (iter != NULL, FALSE);
+#ifndef G_DISABLE_ASSERT
+ g_return_val_if_fail (ri->version == ri->hash_table->version, FALSE);
+#endif
+
+ if (ri->pre_advanced)
+ {
+ ri->pre_advanced = FALSE;
+
+ if (ri->node == NULL)
+ return FALSE;
+ }
+ else
+ {
+ if (ri->node != NULL)
+ {
+ ri->prev_node = ri->node;
+ ri->node = ri->node->next;
+ }
+
+ while (ri->node == NULL)
+ {
+ ri->position++;
+ if (ri->position >= ri->hash_table->size)
+ return FALSE;
+
+ ri->prev_node = NULL;
+ ri->node = ri->hash_table->nodes[ri->position];
+ }
+ }
+
+ if (key != NULL)
+ *key = ri->node->key;
+ if (value != NULL)
+ *value = ri->node->value;
+
+ return TRUE;
+}
+
+/**
+ * g_hash_table_iter_get_hash_table:
+ * @iter: an initialized #GHashTableIter.
+ *
+ * Returns the #GHashTable associated with @iter.
+ *
+ * Return value: the #GHashTable associated with @iter.
+ *
+ * Since: 2.16
+ **/
+GHashTable *
+g_hash_table_iter_get_hash_table (GHashTableIter *iter)
+{
+ g_return_val_if_fail (iter != NULL, NULL);
+
+ return ((RealIter *) iter)->hash_table;
+}
+
+static void
+iter_remove_or_steal (RealIter *ri, gboolean notify)
+{
+ GHashNode *prev;
+ GHashNode *node;
+ int position;
+
+ g_return_if_fail (ri != NULL);
+#ifndef G_DISABLE_ASSERT
+ g_return_if_fail (ri->version == ri->hash_table->version);
+#endif
+ g_return_if_fail (ri->node != NULL);
+
+ prev = ri->prev_node;
+ node = ri->node;
+ position = ri->position;
+
+ /* pre-advance the iterator since we will remove the node */
+
+ ri->node = ri->node->next;
+ /* ri->prev_node is still the correct previous node */
+
+ while (ri->node == NULL)
+ {
+ ri->position++;
+ if (ri->position >= ri->hash_table->size)
+ break;
+
+ ri->prev_node = NULL;
+ ri->node = ri->hash_table->nodes[ri->position];
+ }
+
+ ri->pre_advanced = TRUE;
+
+ /* remove the node */
+
+ if (prev != NULL)
+ prev->next = node->next;
+ else
+ ri->hash_table->nodes[position] = node->next;
+
+ if (notify)
+ {
+ if (ri->hash_table->key_destroy_func)
+ ri->hash_table->key_destroy_func(node->key);
+ if (ri->hash_table->value_destroy_func)
+ ri->hash_table->value_destroy_func(node->value);
+ }
+
+ g_slice_free (GHashNode, node);
+
+ ri->hash_table->nnodes--;
+
+#ifndef G_DISABLE_ASSERT
+ ri->version++;
+ ri->hash_table->version++;
+#endif
+}
+
+/**
+ * g_hash_table_iter_remove():
+ * @iter: an initialized #GHashTableIter.
+ *
+ * Removes the key/value pair currently pointed to by the iterator
+ * from its associated #GHashTable. Can only be called after
+ * g_hash_table_iter_next() returned %TRUE, and cannot be called more
+ * than once for the same key/value pair.
+ *
+ * If the #GHashTable was created using g_hash_table_new_full(), the
+ * key and value are freed using the supplied destroy functions, otherwise
+ * you have to make sure that any dynamically allocated values are freed
+ * yourself.
+ *
+ * Since: 2.16
+ **/
+void
+g_hash_table_iter_remove (GHashTableIter *iter)
+{
+ iter_remove_or_steal ((RealIter *) iter, TRUE);
+}
+
+/**
+ * g_hash_table_iter_steal():
+ * @iter: an initialized #GHashTableIter.
+ *
+ * Removes the key/value pair currently pointed to by the iterator
+ * from its associated #GHashTable, without calling the key and value
+ * destroy functions. Can only be called after
+ * g_hash_table_iter_next() returned %TRUE, and cannot be called more
+ * than once for the same key/value pair.
+ *
+ * Since: 2.16
+ **/
+void
+g_hash_table_iter_steal (GHashTableIter *iter)
+{
+ iter_remove_or_steal ((RealIter *) iter, FALSE);
+}
+
+
+/**
+ * g_hash_table_ref:
+ * @hash_table: a valid #GHashTable.
+ *
+ * Atomically increments the reference count of @hash_table by one.
+ * This function is MT-safe and may be called from any thread.
+ *
+ * Return value: the passed in #GHashTable.
+ *
+ * Since: 2.10
+ **/
+GHashTable*
+g_hash_table_ref (GHashTable *hash_table)
+{
+ g_return_val_if_fail (hash_table != NULL, NULL);
+ g_return_val_if_fail (hash_table->ref_count > 0, hash_table);
+
+ g_atomic_int_add (&hash_table->ref_count, 1);
+ return hash_table;
+}
+
+/**
+ * g_hash_table_unref:
+ * @hash_table: a valid #GHashTable.
+ *
+ * Atomically decrements the reference count of @hash_table by one.
+ * If the reference count drops to 0, all keys and values will be
+ * destroyed, and all memory allocated by the hash table is released.
+ * This function is MT-safe and may be called from any thread.
+ *
+ * Since: 2.10
+ **/
+void
+g_hash_table_unref (GHashTable *hash_table)
+{
+ g_return_if_fail (hash_table != NULL);
+ g_return_if_fail (hash_table->ref_count > 0);
+
+ if (g_atomic_int_exchange_and_add (&hash_table->ref_count, -1) - 1 == 0)
+ {
+ g_hash_table_remove_all_nodes (hash_table, TRUE);
+ g_free (hash_table->nodes);
+ g_slice_free (GHashTable, hash_table);
+ }
+}
+
+/**
+ * g_hash_table_destroy:
+ * @hash_table: a #GHashTable.
+ *
+ * Destroys all keys and values in the #GHashTable and decrements its
+ * reference count by 1. If keys and/or values are dynamically allocated,
+ * you should either free them first or create the #GHashTable with destroy
+ * notifiers using g_hash_table_new_full(). In the latter case the destroy
+ * functions you supplied will be called on all keys and values during the
+ * destruction phase.
+ **/
+void
+g_hash_table_destroy (GHashTable *hash_table)
+{
+ g_return_if_fail (hash_table != NULL);
+ g_return_if_fail (hash_table->ref_count > 0);
+
+ g_hash_table_remove_all (hash_table);
+ g_hash_table_unref (hash_table);
+}
+
+/**
+ * g_hash_table_lookup:
+ * @hash_table: a #GHashTable.
+ * @key: the key to look up.
+ *
+ * Looks up a key in a #GHashTable. Note that this function cannot
+ * distinguish between a key that is not present and one which is present
+ * and has the value %NULL. If you need this distinction, use
+ * g_hash_table_lookup_extended().
+ *
+ * Return value: the associated value, or %NULL if the key is not found.
+ **/
+gpointer
+g_hash_table_lookup (GHashTable *hash_table,
+ gconstpointer key)
+{
+ GHashNode *node;
+
+ g_return_val_if_fail (hash_table != NULL, NULL);
+
+ node = *g_hash_table_lookup_node (hash_table, key, NULL);
+
+ return node ? node->value : NULL;
+}
+
+/**
+ * g_hash_table_lookup_extended:
+ * @hash_table: a #GHashTable.
+ * @lookup_key: the key to look up.
+ * @orig_key: returns the original key.
+ * @value: returns the value associated with the key.
+ *
+ * Looks up a key in the #GHashTable, returning the original key and the
+ * associated value and a #gboolean which is %TRUE if the key was found. This
+ * is useful if you need to free the memory allocated for the original key,
+ * for example before calling g_hash_table_remove().
+ *
+ * Return value: %TRUE if the key was found in the #GHashTable.
+ **/
+gboolean
+g_hash_table_lookup_extended (GHashTable *hash_table,
+ gconstpointer lookup_key,
+ gpointer *orig_key,
+ gpointer *value)
+{
+ GHashNode *node;
+
+ g_return_val_if_fail (hash_table != NULL, FALSE);
+
+ node = *g_hash_table_lookup_node (hash_table, lookup_key, NULL);
+
+ if (node == NULL)
+ return FALSE;
+
+ if (orig_key)
+ *orig_key = node->key;
+
+ if (value)
+ *value = node->value;
+
+ return TRUE;
+}
+
+/*
+ * g_hash_table_insert_internal:
+ * @hash_table: our #GHashTable
+ * @key: the key to insert
+ * @value: the value to insert
+ * @keep_new_key: if %TRUE and this key already exists in the table
+ * then call the destroy notify function on the old key. If %FALSE
+ * then call the destroy notify function on the new key.
+ *
+ * Implements the common logic for the g_hash_table_insert() and
+ * g_hash_table_replace() functions.
+ *
+ * Do a lookup of @key. If it is found, replace it with the new
+ * @value (and perhaps the new @key). If it is not found, create a
+ * new node.
+ */
+static void
+g_hash_table_insert_internal (GHashTable *hash_table,
+ gpointer key,
+ gpointer value,
+ gboolean keep_new_key)
+{
+ GHashNode **node_ptr, *node;
+ guint key_hash;
+
+ g_return_if_fail (hash_table != NULL);
+ g_return_if_fail (hash_table->ref_count > 0);
+
+ node_ptr = g_hash_table_lookup_node (hash_table, key, &key_hash);
+
+ if ((node = *node_ptr))
+ {
+ if (keep_new_key)
+ {
+ if (hash_table->key_destroy_func)
+ hash_table->key_destroy_func (node->key);
+ node->key = key;
+ }
+ else
+ {
+ if (hash_table->key_destroy_func)
+ hash_table->key_destroy_func (key);
+ }
+
+ if (hash_table->value_destroy_func)
+ hash_table->value_destroy_func (node->value);
+
+ node->value = value;
+ }
+ else
+ {
+ node = g_slice_new (GHashNode);
+
+ node->key = key;
+ node->value = value;
+ node->key_hash = key_hash;
+ node->next = NULL;
+
+ *node_ptr = node;
+ hash_table->nnodes++;
+ g_hash_table_maybe_resize (hash_table);
+
+#ifndef G_DISABLE_ASSERT
+ hash_table->version++;
+#endif
+ }
+}
+
+/**
+ * g_hash_table_insert:
+ * @hash_table: a #GHashTable.
+ * @key: a key to insert.
+ * @value: the value to associate with the key.
+ *
+ * Inserts a new key and value into a #GHashTable.
+ *
+ * If the key already exists in the #GHashTable its current value is replaced
+ * with the new value. If you supplied a @value_destroy_func when creating the
+ * #GHashTable, the old value is freed using that function. If you supplied
+ * a @key_destroy_func when creating the #GHashTable, the passed key is freed
+ * using that function.
+ **/
+void
+g_hash_table_insert (GHashTable *hash_table,
+ gpointer key,
+ gpointer value)
+{
+ g_hash_table_insert_internal (hash_table, key, value, FALSE);
+}
+
+/**
+ * g_hash_table_replace:
+ * @hash_table: a #GHashTable.
+ * @key: a key to insert.
+ * @value: the value to associate with the key.
+ *
+ * Inserts a new key and value into a #GHashTable similar to
+ * g_hash_table_insert(). The difference is that if the key already exists
+ * in the #GHashTable, it gets replaced by the new key. If you supplied a
+ * @value_destroy_func when creating the #GHashTable, the old value is freed
+ * using that function. If you supplied a @key_destroy_func when creating the
+ * #GHashTable, the old key is freed using that function.
+ **/
+void
+g_hash_table_replace (GHashTable *hash_table,
+ gpointer key,
+ gpointer value)
+{
+ g_hash_table_insert_internal (hash_table, key, value, TRUE);
+}
+
+/*
+ * g_hash_table_remove_internal:
+ * @hash_table: our #GHashTable
+ * @key: the key to remove
+ * @notify: %TRUE if the destroy notify handlers are to be called
+ * Return value: %TRUE if a node was found and removed, else %FALSE
+ *
+ * Implements the common logic for the g_hash_table_remove() and
+ * g_hash_table_steal() functions.
+ *
+ * Do a lookup of @key and remove it if it is found, calling the
+ * destroy notify handlers only if @notify is %TRUE.
+ */
+static gboolean
+g_hash_table_remove_internal (GHashTable *hash_table,
+ gconstpointer key,
+ gboolean notify)
+{
+ GHashNode **node_ptr;
+
+ g_return_val_if_fail (hash_table != NULL, FALSE);
+
+ node_ptr = g_hash_table_lookup_node (hash_table, key, NULL);
+ if (*node_ptr == NULL)
+ return FALSE;
+
+ g_hash_table_remove_node (hash_table, &node_ptr, notify);
+ g_hash_table_maybe_resize (hash_table);
+
+#ifndef G_DISABLE_ASSERT
+ hash_table->version++;
+#endif
+
+ return TRUE;
+}
+
+/**
+ * g_hash_table_remove:
+ * @hash_table: a #GHashTable.
+ * @key: the key to remove.
+ *
+ * Removes a key and its associated value from a #GHashTable.
+ *
+ * If the #GHashTable was created using g_hash_table_new_full(), the
+ * key and value are freed using the supplied destroy functions, otherwise
+ * you have to make sure that any dynamically allocated values are freed
+ * yourself.
+ *
+ * Return value: %TRUE if the key was found and removed from the #GHashTable.
+ **/
+gboolean
+g_hash_table_remove (GHashTable *hash_table,
+ gconstpointer key)
+{
+ return g_hash_table_remove_internal (hash_table, key, TRUE);
+}
+
+/**
+ * g_hash_table_steal:
+ * @hash_table: a #GHashTable.
+ * @key: the key to remove.
+ *
+ * Removes a key and its associated value from a #GHashTable without
+ * calling the key and value destroy functions.
+ *
+ * Return value: %TRUE if the key was found and removed from the #GHashTable.
+ **/
+gboolean
+g_hash_table_steal (GHashTable *hash_table,
+ gconstpointer key)
+{
+ return g_hash_table_remove_internal (hash_table, key, FALSE);
+}
+
+/**
+ * g_hash_table_remove_all:
+ * @hash_table: a #GHashTable
+ *
+ * Removes all keys and their associated values from a #GHashTable.
+ *
+ * If the #GHashTable was created using g_hash_table_new_full(), the keys
+ * and values are freed using the supplied destroy functions, otherwise you
+ * have to make sure that any dynamically allocated values are freed
+ * yourself.
+ *
+ * Since: 2.12
+ **/
+void
+g_hash_table_remove_all (GHashTable *hash_table)
+{
+ g_return_if_fail (hash_table != NULL);
+
+#ifndef G_DISABLE_ASSERT
+ if (hash_table->nnodes != 0)
+ hash_table->version++;
+#endif
+
+ g_hash_table_remove_all_nodes (hash_table, TRUE);
+ g_hash_table_maybe_resize (hash_table);
+}
+
+/**
+ * g_hash_table_steal_all:
+ * @hash_table: a #GHashTable.
+ *
+ * Removes all keys and their associated values from a #GHashTable
+ * without calling the key and value destroy functions.
+ *
+ * Since: 2.12
+ **/
+void
+g_hash_table_steal_all (GHashTable *hash_table)
+{
+ g_return_if_fail (hash_table != NULL);
+
+#ifndef G_DISABLE_ASSERT
+ if (hash_table->nnodes != 0)
+ hash_table->version++;
+#endif
+
+ g_hash_table_remove_all_nodes (hash_table, FALSE);
+ g_hash_table_maybe_resize (hash_table);
+}
+
+/*
+ * g_hash_table_foreach_remove_or_steal:
+ * @hash_table: our #GHashTable
+ * @func: the user's callback function
+ * @user_data: data for @func
+ * @notify: %TRUE if the destroy notify handlers are to be called
+ *
+ * Implements the common logic for g_hash_table_foreach_remove() and
+ * g_hash_table_foreach_steal().
+ *
+ * Iterates over every node in the table, calling @func with the key
+ * and value of the node (and @user_data). If @func returns %TRUE the
+ * node is removed from the table.
+ *
+ * If @notify is true then the destroy notify handlers will be called
+ * for each removed node.
+ */
+static guint
+g_hash_table_foreach_remove_or_steal (GHashTable *hash_table,
+ GHRFunc func,
+ gpointer user_data,
+ gboolean notify)
+{
+ GHashNode *node, **node_ptr;
+ guint deleted = 0;
+ gint i;
+
+ for (i = 0; i < hash_table->size; i++)
+ for (node_ptr = &hash_table->nodes[i]; (node = *node_ptr) != NULL;)
+ if ((* func) (node->key, node->value, user_data))
+ {
+ g_hash_table_remove_node (hash_table, &node_ptr, notify);
+ deleted++;
+ }
+ else
+ node_ptr = &node->next;
+
+ g_hash_table_maybe_resize (hash_table);
+
+#ifndef G_DISABLE_ASSERT
+ if (deleted > 0)
+ hash_table->version++;
+#endif
+
+ return deleted;
+}
+
+/**
+ * g_hash_table_foreach_remove:
+ * @hash_table: a #GHashTable.
+ * @func: the function to call for each key/value pair.
+ * @user_data: user data to pass to the function.
+ *
+ * Calls the given function for each key/value pair in the #GHashTable.
+ * If the function returns %TRUE, then the key/value pair is removed from the
+ * #GHashTable. If you supplied key or value destroy functions when creating
+ * the #GHashTable, they are used to free the memory allocated for the removed
+ * keys and values.
+ *
+ * See #GHashTableIterator for an alternative way to loop over the
+ * key/value pairs in the hash table.
+ *
+ * Return value: the number of key/value pairs removed.
+ **/
+guint
+g_hash_table_foreach_remove (GHashTable *hash_table,
+ GHRFunc func,
+ gpointer user_data)
+{
+ g_return_val_if_fail (hash_table != NULL, 0);
+ g_return_val_if_fail (func != NULL, 0);
+
+ return g_hash_table_foreach_remove_or_steal (hash_table, func, user_data, TRUE);
+}
+
+/**
+ * g_hash_table_foreach_steal:
+ * @hash_table: a #GHashTable.
+ * @func: the function to call for each key/value pair.
+ * @user_data: user data to pass to the function.
+ *
+ * Calls the given function for each key/value pair in the #GHashTable.
+ * If the function returns %TRUE, then the key/value pair is removed from the
+ * #GHashTable, but no key or value destroy functions are called.
+ *
+ * See #GHashTableIterator for an alternative way to loop over the
+ * key/value pairs in the hash table.
+ *
+ * Return value: the number of key/value pairs removed.
+ **/
+guint
+g_hash_table_foreach_steal (GHashTable *hash_table,
+ GHRFunc func,
+ gpointer user_data)
+{
+ g_return_val_if_fail (hash_table != NULL, 0);
+ g_return_val_if_fail (func != NULL, 0);
+
+ return g_hash_table_foreach_remove_or_steal (hash_table, func, user_data, FALSE);
+}
+
+/**
+ * g_hash_table_foreach:
+ * @hash_table: a #GHashTable.
+ * @func: the function to call for each key/value pair.
+ * @user_data: user data to pass to the function.
+ *
+ * Calls the given function for each of the key/value pairs in the
+ * #GHashTable. The function is passed the key and value of each
+ * pair, and the given @user_data parameter. The hash table may not
+ * be modified while iterating over it (you can't add/remove
+ * items). To remove all items matching a predicate, use
+ * g_hash_table_foreach_remove().
+ *
+ * See g_hash_table_find() for performance caveats for linear
+ * order searches in contrast to g_hash_table_lookup().
+ **/
+void
+g_hash_table_foreach (GHashTable *hash_table,
+ GHFunc func,
+ gpointer user_data)
+{
+ GHashNode *node;
+ gint i;
+
+ g_return_if_fail (hash_table != NULL);
+ g_return_if_fail (func != NULL);
+
+ for (i = 0; i < hash_table->size; i++)
+ for (node = hash_table->nodes[i]; node; node = node->next)
+ (* func) (node->key, node->value, user_data);
+}
+
+/**
+ * g_hash_table_find:
+ * @hash_table: a #GHashTable.
+ * @predicate: function to test the key/value pairs for a certain property.
+ * @user_data: user data to pass to the function.
+ *
+ * Calls the given function for key/value pairs in the #GHashTable until
+ * @predicate returns %TRUE. The function is passed the key and value of
+ * each pair, and the given @user_data parameter. The hash table may not
+ * be modified while iterating over it (you can't add/remove items).
+ *
+ * Note, that hash tables are really only optimized for forward lookups,
+ * i.e. g_hash_table_lookup().
+ * So code that frequently issues g_hash_table_find() or
+ * g_hash_table_foreach() (e.g. in the order of once per every entry in a
+ * hash table) should probably be reworked to use additional or different
+ * data structures for reverse lookups (keep in mind that an O(n) find/foreach
+ * operation issued for all n values in a hash table ends up needing O(n*n)
+ * operations).
+ *
+ * Return value: The value of the first key/value pair is returned, for which
+ * func evaluates to %TRUE. If no pair with the requested property is found,
+ * %NULL is returned.
+ *
+ * Since: 2.4
+ **/
+gpointer
+g_hash_table_find (GHashTable *hash_table,
+ GHRFunc predicate,
+ gpointer user_data)
+{
+ GHashNode *node;
+ gint i;
+
+ g_return_val_if_fail (hash_table != NULL, NULL);
+ g_return_val_if_fail (predicate != NULL, NULL);
+
+ for (i = 0; i < hash_table->size; i++)
+ for (node = hash_table->nodes[i]; node; node = node->next)
+ if (predicate (node->key, node->value, user_data))
+ return node->value;
+ return NULL;
+}
+
+/**
+ * g_hash_table_size:
+ * @hash_table: a #GHashTable.
+ *
+ * Returns the number of elements contained in the #GHashTable.
+ *
+ * Return value: the number of key/value pairs in the #GHashTable.
+ **/
+guint
+g_hash_table_size (GHashTable *hash_table)
+{
+ g_return_val_if_fail (hash_table != NULL, 0);
+
+ return hash_table->nnodes;
+}
+
+/**
+ * g_hash_table_get_keys:
+ * @hash_table: a #GHashTable
+ *
+ * Retrieves every key inside @hash_table. The returned data is valid
+ * until @hash_table is modified.
+ *
+ * Return value: a #GList containing all the keys inside the hash
+ * table. The content of the list is owned by the hash table and
+ * should not be modified or freed. Use g_list_free() when done
+ * using the list.
+ *
+ * Since: 2.14
+ */
+GList *
+g_hash_table_get_keys (GHashTable *hash_table)
+{
+ GHashNode *node;
+ gint i;
+ GList *retval;
+
+ g_return_val_if_fail (hash_table != NULL, NULL);
+
+ retval = NULL;
+ for (i = 0; i < hash_table->size; i++)
+ for (node = hash_table->nodes[i]; node; node = node->next)
+ retval = g_list_prepend (retval, node->key);
+
+ return retval;
+}
+
+/**
+ * g_hash_table_get_values:
+ * @hash_table: a #GHashTable
+ *
+ * Retrieves every value inside @hash_table. The returned data is
+ * valid until @hash_table is modified.
+ *
+ * Return value: a #GList containing all the values inside the hash
+ * table. The content of the list is owned by the hash table and
+ * should not be modified or freed. Use g_list_free() when done
+ * using the list.
+ *
+ * Since: 2.14
+ */
+GList *
+g_hash_table_get_values (GHashTable *hash_table)
+{
+ GHashNode *node;
+ gint i;
+ GList *retval;
+
+ g_return_val_if_fail (hash_table != NULL, NULL);
+
+ retval = NULL;
+ for (i = 0; i < hash_table->size; i++)
+ for (node = hash_table->nodes[i]; node; node = node->next)
+ retval = g_list_prepend (retval, node->value);
+
+ return retval;
+}
+
+#define __G_HASH_C__
+#include "galiasdef.c"