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Generic hash cleanup, added a function (g_hash_table_lookup_full).

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This commit is contained in:
Lauri Alanko
1998-07-07 08:27:58 +00:00
parent f154104379
commit 7519c2338a
12 changed files with 434 additions and 516 deletions
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9
ChangeLog
View File

@@ -1,3 +1,12 @@
Tue Jul 7 03:18:58 EEST 1998 Lauri Alanko <nether@gimp.org>
* glib.h:
* ghash.c: Generic cleanup, added a function:
(g_hash_table_lookup_full): Return whether the lookup succeeded,
and also retrieve the key and value. This allows one to
distinguish between failed lookup and finding a NULL, and also
allows one to free a key in the hash.
Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org> Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org>
* ltconfig: fix for properly detecting shared lib support on * ltconfig: fix for properly detecting shared lib support on

9
ChangeLog.pre-2-0
View File

@@ -1,3 +1,12 @@
Tue Jul 7 03:18:58 EEST 1998 Lauri Alanko <nether@gimp.org>
* glib.h:
* ghash.c: Generic cleanup, added a function:
(g_hash_table_lookup_full): Return whether the lookup succeeded,
and also retrieve the key and value. This allows one to
distinguish between failed lookup and finding a NULL, and also
allows one to free a key in the hash.
Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org> Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org>
* ltconfig: fix for properly detecting shared lib support on * ltconfig: fix for properly detecting shared lib support on

9
ChangeLog.pre-2-10
View File

@@ -1,3 +1,12 @@
Tue Jul 7 03:18:58 EEST 1998 Lauri Alanko <nether@gimp.org>
* glib.h:
* ghash.c: Generic cleanup, added a function:
(g_hash_table_lookup_full): Return whether the lookup succeeded,
and also retrieve the key and value. This allows one to
distinguish between failed lookup and finding a NULL, and also
allows one to free a key in the hash.
Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org> Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org>
* ltconfig: fix for properly detecting shared lib support on * ltconfig: fix for properly detecting shared lib support on

9
ChangeLog.pre-2-12
View File

@@ -1,3 +1,12 @@
Tue Jul 7 03:18:58 EEST 1998 Lauri Alanko <nether@gimp.org>
* glib.h:
* ghash.c: Generic cleanup, added a function:
(g_hash_table_lookup_full): Return whether the lookup succeeded,
and also retrieve the key and value. This allows one to
distinguish between failed lookup and finding a NULL, and also
allows one to free a key in the hash.
Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org> Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org>
* ltconfig: fix for properly detecting shared lib support on * ltconfig: fix for properly detecting shared lib support on

9
ChangeLog.pre-2-2
View File

@@ -1,3 +1,12 @@
Tue Jul 7 03:18:58 EEST 1998 Lauri Alanko <nether@gimp.org>
* glib.h:
* ghash.c: Generic cleanup, added a function:
(g_hash_table_lookup_full): Return whether the lookup succeeded,
and also retrieve the key and value. This allows one to
distinguish between failed lookup and finding a NULL, and also
allows one to free a key in the hash.
Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org> Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org>
* ltconfig: fix for properly detecting shared lib support on * ltconfig: fix for properly detecting shared lib support on

9
ChangeLog.pre-2-4
View File

@@ -1,3 +1,12 @@
Tue Jul 7 03:18:58 EEST 1998 Lauri Alanko <nether@gimp.org>
* glib.h:
* ghash.c: Generic cleanup, added a function:
(g_hash_table_lookup_full): Return whether the lookup succeeded,
and also retrieve the key and value. This allows one to
distinguish between failed lookup and finding a NULL, and also
allows one to free a key in the hash.
Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org> Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org>
* ltconfig: fix for properly detecting shared lib support on * ltconfig: fix for properly detecting shared lib support on

9
ChangeLog.pre-2-6
View File

@@ -1,3 +1,12 @@
Tue Jul 7 03:18:58 EEST 1998 Lauri Alanko <nether@gimp.org>
* glib.h:
* ghash.c: Generic cleanup, added a function:
(g_hash_table_lookup_full): Return whether the lookup succeeded,
and also retrieve the key and value. This allows one to
distinguish between failed lookup and finding a NULL, and also
allows one to free a key in the hash.
Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org> Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org>
* ltconfig: fix for properly detecting shared lib support on * ltconfig: fix for properly detecting shared lib support on

9
ChangeLog.pre-2-8
View File

@@ -1,3 +1,12 @@
Tue Jul 7 03:18:58 EEST 1998 Lauri Alanko <nether@gimp.org>
* glib.h:
* ghash.c: Generic cleanup, added a function:
(g_hash_table_lookup_full): Return whether the lookup succeeded,
and also retrieve the key and value. This allows one to
distinguish between failed lookup and finding a NULL, and also
allows one to free a key in the hash.
Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org> Mon Jul 6 10:12:05 PDT 1998 Manish Singh <yosh@gimp.org>
* ltconfig: fix for properly detecting shared lib support on * ltconfig: fix for properly detecting shared lib support on

402
ghash.c
View File

@@ -24,7 +24,6 @@
typedef struct _GHashNode GHashNode; typedef struct _GHashNode GHashNode;
typedef struct _GRealHashTable GRealHashTable;
struct _GHashNode struct _GHashNode
{ {
@@ -33,7 +32,7 @@ struct _GHashNode
GHashNode *next; GHashNode *next;
}; };
struct _GRealHashTable struct _GHashTable
{ {
gint size; gint size;
gint nnodes; gint nnodes;
@@ -44,17 +43,16 @@ struct _GRealHashTable
}; };
static void g_hash_table_resize (GHashTable *hash_table); static void g_hash_table_resize (GHashTable *hash_table);
static gint g_hash_closest_prime (gint num); static GHashNode** g_hash_table_lookup_node(GHashTable *hash_table,
static GHashNode* g_hash_node_new (gpointer key, gconstpointer key);
gpointer value); static gint g_hash_closest_prime (gint num);
static void g_hash_node_destroy (GHashNode *hash_node); static GHashNode* g_hash_node_new (gpointer key,
static void g_hash_nodes_destroy (GHashNode *hash_node); gpointer value);
static void g_hash_node_destroy (GHashNode *hash_node);
static void g_hash_nodes_destroy (GHashNode *hash_node);
extern gint g_primes[];
extern gint g_nprimes;
static GMemChunk *node_mem_chunk = NULL; static GMemChunk *node_mem_chunk = NULL;
static GHashNode *node_free_list = NULL; static GHashNode *node_free_list = NULL;
@@ -63,38 +61,35 @@ GHashTable*
g_hash_table_new (GHashFunc hash_func, g_hash_table_new (GHashFunc hash_func,
GCompareFunc key_compare_func) GCompareFunc key_compare_func)
{ {
GRealHashTable *hash_table; GHashTable *hash_table;
gint i;
g_return_val_if_fail (hash_func != NULL, NULL);
hash_table = g_new (GHashTable, 1);
hash_table = g_new (GRealHashTable, 1); hash_table->size = HASH_TABLE_MIN_SIZE;
hash_table->size = 0;
hash_table->nnodes = 0; hash_table->nnodes = 0;
hash_table->frozen = FALSE; hash_table->frozen = FALSE;
hash_table->nodes = NULL; hash_table->hash_func = hash_func ? hash_func : g_direct_hash;
hash_table->hash_func = hash_func;
hash_table->key_compare_func = key_compare_func; hash_table->key_compare_func = key_compare_func;
hash_table->nodes = g_new (GHashNode*, hash_table->size);
for (i = 0; i < hash_table->size; i++)
hash_table->nodes[i] = NULL;
return ((GHashTable*) hash_table); return hash_table;
} }
void void
g_hash_table_destroy (GHashTable *hash_table) g_hash_table_destroy (GHashTable *hash_table)
{ {
GRealHashTable *rhash_table;
gint i; gint i;
if (hash_table) g_return_if_fail (hash_table);
{
rhash_table = (GRealHashTable*) hash_table; for (i = 0; i < hash_table->size; i++)
g_hash_nodes_destroy (hash_table->nodes[i]);
for (i = 0; i < rhash_table->size; i++)
g_hash_nodes_destroy (rhash_table->nodes[i]); g_free (hash_table->nodes);
g_free (hash_table);
if (rhash_table->nodes)
g_free (rhash_table->nodes);
g_free (rhash_table);
}
} }
void void
@@ -102,45 +97,28 @@ g_hash_table_insert (GHashTable *hash_table,
gpointer key, gpointer key,
gpointer value) gpointer value)
{ {
GRealHashTable *rhash_table; GHashNode **node;
GHashNode *node;
guint hash_val;
if (hash_table) g_return_if_fail (hash_table);
node = g_hash_table_lookup_node (hash_table, key);
if (*node)
{ {
rhash_table = (GRealHashTable*) hash_table; /* do not reset node->key in this place, keeping
* the old key might be intended.
if (rhash_table->size == 0) * a g_hash_table_remove/g_hash_table_insert pair
* can be used otherwise.
*
* node->key = key; */
(*node)->value = value;
}
else
{
*node = g_hash_node_new (key, value);
hash_table->nnodes++;
if (!hash_table->frozen)
g_hash_table_resize (hash_table); g_hash_table_resize (hash_table);
hash_val = (* rhash_table->hash_func) (key) % rhash_table->size;
node = rhash_table->nodes[hash_val];
while (node)
{
if ((rhash_table->key_compare_func &&
(* rhash_table->key_compare_func) (node->key, key)) ||
(node->key == key))
{
/* do not reset node->key in this place, keeping
* the old key might be intended.
* a g_hash_table_remove/g_hash_table_insert pair
* can be used otherwise.
*
* node->key = key;
*/
node->value = value;
return;
}
node = node->next;
}
node = g_hash_node_new (key, value);
node->next = rhash_table->nodes[hash_val];
rhash_table->nodes[hash_val] = node;
rhash_table->nnodes += 1;
g_hash_table_resize (hash_table);
} }
} }
@@ -148,110 +126,73 @@ void
g_hash_table_remove (GHashTable *hash_table, g_hash_table_remove (GHashTable *hash_table,
gconstpointer key) gconstpointer key)
{ {
GRealHashTable *rhash_table; GHashNode **node, *dest;
GHashNode *node;
GHashNode *prev;
guint hash_val;
rhash_table = (GRealHashTable*) hash_table; g_return_if_fail (hash_table);
if (hash_table && rhash_table->size)
while (*(node = g_hash_table_lookup_node (hash_table, key)))
{ {
hash_val = (* rhash_table->hash_func) (key) % rhash_table->size; dest = *node;
(*node) = dest->next;
prev = NULL; g_hash_node_destroy (dest);
node = rhash_table->nodes[hash_val]; hash_table->nnodes--;
while (node)
{
if ((rhash_table->key_compare_func &&
(* rhash_table->key_compare_func) (node->key, key)) ||
(node->key == key))
{
if (prev)
prev->next = node->next;
if (node == rhash_table->nodes[hash_val])
rhash_table->nodes[hash_val] = node->next;
g_hash_node_destroy (node);
rhash_table->nnodes -= 1;
g_hash_table_resize (hash_table);
break;
}
prev = node;
node = node->next;
}
} }
if (!hash_table->frozen)
g_hash_table_resize (hash_table);
} }
gpointer gpointer
g_hash_table_lookup (GHashTable *hash_table, g_hash_table_lookup (GHashTable *hash_table,
gconstpointer key) gconstpointer key)
{ {
GRealHashTable *rhash_table;
GHashNode *node; GHashNode *node;
guint hash_val;
g_return_val_if_fail (hash_table, NULL);
rhash_table = (GRealHashTable*) hash_table; node = *g_hash_table_lookup_node (hash_table, key);
if (hash_table && rhash_table->size) return node ? node->value : NULL;
}
gboolean
g_hash_table_lookup_full (GHashTable *hash_table,
gconstpointer lookup_key,
gpointer *orig_key,
gpointer *value)
{
GHashNode *node;
g_return_val_if_fail (hash_table, FALSE);
node = *g_hash_table_lookup_node (hash_table, lookup_key);
if (node)
{ {
hash_val = (* rhash_table->hash_func) (key) % rhash_table->size; if (orig_key)
*orig_key = node->key;
node = rhash_table->nodes[hash_val]; if (value)
*value = node->value;
/* Hash table lookup needs to be fast. return TRUE;
* We therefore remove the extra conditional of testing
* whether to call the key_compare_func or not from
* the inner loop.
*/
if (rhash_table->key_compare_func)
{
while (node)
{
if ((* rhash_table->key_compare_func) (node->key, key))
return node->value;
node = node->next;
}
}
else
{
while (node)
{
if (node->key == key)
return node->value;
node = node->next;
}
}
} }
else
return NULL; return FALSE;
} }
void void
g_hash_table_freeze (GHashTable *hash_table) g_hash_table_freeze (GHashTable *hash_table)
{ {
GRealHashTable *rhash_table; g_return_if_fail (hash_table);
if (hash_table) hash_table->frozen = TRUE;
{
rhash_table = (GRealHashTable*) hash_table;
rhash_table->frozen = TRUE;
}
} }
void void
g_hash_table_thaw (GHashTable *hash_table) g_hash_table_thaw (GHashTable *hash_table)
{ {
GRealHashTable *rhash_table; g_return_if_fail (hash_table);
if (hash_table) hash_table->frozen = FALSE;
{
rhash_table = (GRealHashTable*) hash_table;
rhash_table->frozen = FALSE;
g_hash_table_resize (hash_table); g_hash_table_resize (hash_table);
}
} }
void void
@@ -259,110 +200,96 @@ g_hash_table_foreach (GHashTable *hash_table,
GHFunc func, GHFunc func,
gpointer user_data) gpointer user_data)
{ {
GRealHashTable *rhash_table;
GHashNode *node; GHashNode *node;
gint i; gint i;
if (hash_table) g_return_if_fail (hash_table);
{
rhash_table = (GRealHashTable*) hash_table;
for (i = 0; i < rhash_table->size; i++) for (i = 0; i < hash_table->size; i++)
{ for (node = hash_table->nodes[i]; node; node = node->next)
node = rhash_table->nodes[i]; (* func) (node->key, node->value, user_data);
while (node)
{
(* func) (node->key, node->value, user_data);
node = node->next;
}
}
}
} }
/* Returns the number of elements contained in the hash table. */
gint g_hash_table_size (GHashTable *hash_table)
{
g_return_val_if_fail (hash_table, 0);
return hash_table->nnodes;
}
static void static void
g_hash_table_resize (GHashTable *hash_table) g_hash_table_resize (GHashTable *hash_table)
{ {
GRealHashTable *rhash_table;
GHashNode **new_nodes; GHashNode **new_nodes;
GHashNode *node; GHashNode *node;
GHashNode *next; GHashNode *next;
gfloat nodes_per_list; gfloat nodes_per_list;
guint hash_val; guint hash_val;
gint new_size; gint new_size;
gint need_resize;
gint i; gint i;
if (hash_table) g_return_if_fail (hash_table);
{
rhash_table = (GRealHashTable*) hash_table;
if (rhash_table->size == 0) nodes_per_list = (gfloat) hash_table->nnodes / (gfloat) hash_table->size;
{
rhash_table->size = HASH_TABLE_MIN_SIZE; if ((nodes_per_list > 0.3 || hash_table->size <= HASH_TABLE_MIN_SIZE) &&
rhash_table->nodes = g_new (GHashNode*, rhash_table->size); (nodes_per_list < 3.0 || hash_table->size >= HASH_TABLE_MAX_SIZE))
return;
for (i = 0; i < rhash_table->size; i++) new_size = CLAMP(g_hash_closest_prime (hash_table->nnodes),
rhash_table->nodes[i] = NULL; HASH_TABLE_MIN_SIZE,
} HASH_TABLE_MAX_SIZE);
else if (!rhash_table->frozen) new_nodes = g_new (GHashNode*, new_size);
{
need_resize = FALSE; for (i = 0; i < new_size; i++)
nodes_per_list = (gfloat) rhash_table->nnodes / (gfloat) rhash_table->size; new_nodes[i] = NULL;
for (i = 0; i < hash_table->size; i++)
for (node = hash_table->nodes[i]; node; node = next)
{
next = node->next;
hash_val = (* hash_table->hash_func) (node->key) % 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;
}
if (nodes_per_list < 0.3) static GHashNode **
{ g_hash_table_lookup_node (GHashTable *hash_table,
if (rhash_table->size > HASH_TABLE_MIN_SIZE) gconstpointer key)
need_resize = TRUE; {
} GHashNode **node;
else if (nodes_per_list > 3.0)
{ g_return_val_if_fail (hash_table, NULL);
if (rhash_table->size < HASH_TABLE_MAX_SIZE)
need_resize = TRUE;
}
if (need_resize) node = &hash_table->nodes
{ [(* hash_table->hash_func) (key) % hash_table->size];
new_size = g_hash_closest_prime (rhash_table->nnodes);
if (new_size < HASH_TABLE_MIN_SIZE)
new_size = HASH_TABLE_MIN_SIZE;
else if (new_size > HASH_TABLE_MAX_SIZE)
new_size = HASH_TABLE_MAX_SIZE;
new_nodes = g_new (GHashNode*, new_size); /* Hash table lookup needs to be fast.
* We therefore remove the extra conditional of testing
for (i = 0; i < new_size; i++) * whether to call the key_compare_func or not from
new_nodes[i] = NULL; * the inner loop.
*/
for (i = 0; i < rhash_table->size; i++) if (hash_table->key_compare_func)
{ while (*node && !(*hash_table->key_compare_func) ((*node)->key, key))
node = rhash_table->nodes[i]; node = &(*node)->next;
else
while (node) while (*node && (*node)->key != key)
{ node = &(*node)->next;
next = node->next;
return node;
hash_val = (* rhash_table->hash_func) (node->key) % new_size;
node->next = new_nodes[hash_val];
new_nodes[hash_val] = node;
node = next;
}
}
g_free (rhash_table->nodes);
rhash_table->nodes = new_nodes;
rhash_table->size = new_size;
}
}
}
} }
static gint static gint
g_hash_closest_prime (gint num) g_hash_closest_prime (gint num)
{ {
extern gint g_primes[];
extern gint g_nprimes;
gint i; gint i;
for (i = 0; i < g_nprimes; i++) for (i = 0; i < g_nprimes; i++)
@@ -403,11 +330,10 @@ g_hash_node_new (gpointer key,
static void static void
g_hash_node_destroy (GHashNode *hash_node) g_hash_node_destroy (GHashNode *hash_node)
{ {
if (hash_node) g_return_if_fail (hash_node);
{
hash_node->next = node_free_list; hash_node->next = node_free_list;
node_free_list = hash_node; node_free_list = hash_node;
}
} }
static void static void
@@ -415,20 +341,14 @@ g_hash_nodes_destroy (GHashNode *hash_node)
{ {
GHashNode *node; GHashNode *node;
if (hash_node) if (!hash_node)
{ return;
node = hash_node;
while (node->next)
node = node->next;
node->next = node_free_list;
node_free_list = hash_node;
}
}
/* Returns the number of elements contained in the hash table. */ node = hash_node;
gint g_hash_table_size (GHashTable *hash_table)
{
g_return_val_if_fail (hash_table, 0);
return ((GRealHashTable *) hash_table)->nnodes; while (node->next)
node = node->next;
node->next = node_free_list;
node_free_list = hash_node;
} }

37
glib.h
View File

@@ -532,7 +532,6 @@ struct _GDebugKey
guint value; guint value;
}; };
struct _GHashTable { gint dummy; };
struct _GCache { gint dummy; }; struct _GCache { gint dummy; };
struct _GTree { gint dummy; }; struct _GTree { gint dummy; };
struct _GTimer { gint dummy; }; struct _GTimer { gint dummy; };
@@ -645,22 +644,26 @@ GListAllocator* g_list_set_allocator (GListAllocator* allocator);
/* Hash tables /* Hash tables
*/ */
GHashTable* g_hash_table_new (GHashFunc hash_func, GHashTable* g_hash_table_new (GHashFunc hash_func,
GCompareFunc key_compare_func); GCompareFunc key_compare_func);
void g_hash_table_destroy (GHashTable *hash_table); void g_hash_table_destroy (GHashTable *hash_table);
void g_hash_table_insert (GHashTable *hash_table, void g_hash_table_insert (GHashTable *hash_table,
gpointer key, gpointer key,
gpointer value); gpointer value);
void g_hash_table_remove (GHashTable *hash_table, void g_hash_table_remove (GHashTable *hash_table,
gconstpointer key); gconstpointer key);
gpointer g_hash_table_lookup (GHashTable *hash_table, gpointer g_hash_table_lookup (GHashTable *hash_table,
gconstpointer key); gconstpointer key);
void g_hash_table_freeze (GHashTable *hash_table); gboolean g_hash_table_lookup_full (GHashTable *hash_table,
void g_hash_table_thaw (GHashTable *hash_table); gconstpointer lookup_key,
void g_hash_table_foreach (GHashTable *hash_table, gpointer *orig_key,
GHFunc func, gpointer *value);
gpointer user_data); void g_hash_table_freeze (GHashTable *hash_table);
gint g_hash_table_size (GHashTable *hash_table); void g_hash_table_thaw (GHashTable *hash_table);
void g_hash_table_foreach (GHashTable *hash_table,
GHFunc func,
gpointer user_data);
gint g_hash_table_size (GHashTable *hash_table);
/* Caches /* Caches

402
glib/ghash.c
View File

@@ -24,7 +24,6 @@
typedef struct _GHashNode GHashNode; typedef struct _GHashNode GHashNode;
typedef struct _GRealHashTable GRealHashTable;
struct _GHashNode struct _GHashNode
{ {
@@ -33,7 +32,7 @@ struct _GHashNode
GHashNode *next; GHashNode *next;
}; };
struct _GRealHashTable struct _GHashTable
{ {
gint size; gint size;
gint nnodes; gint nnodes;
@@ -44,17 +43,16 @@ struct _GRealHashTable
}; };
static void g_hash_table_resize (GHashTable *hash_table); static void g_hash_table_resize (GHashTable *hash_table);
static gint g_hash_closest_prime (gint num); static GHashNode** g_hash_table_lookup_node(GHashTable *hash_table,
static GHashNode* g_hash_node_new (gpointer key, gconstpointer key);
gpointer value); static gint g_hash_closest_prime (gint num);
static void g_hash_node_destroy (GHashNode *hash_node); static GHashNode* g_hash_node_new (gpointer key,
static void g_hash_nodes_destroy (GHashNode *hash_node); gpointer value);
static void g_hash_node_destroy (GHashNode *hash_node);
static void g_hash_nodes_destroy (GHashNode *hash_node);
extern gint g_primes[];
extern gint g_nprimes;
static GMemChunk *node_mem_chunk = NULL; static GMemChunk *node_mem_chunk = NULL;
static GHashNode *node_free_list = NULL; static GHashNode *node_free_list = NULL;
@@ -63,38 +61,35 @@ GHashTable*
g_hash_table_new (GHashFunc hash_func, g_hash_table_new (GHashFunc hash_func,
GCompareFunc key_compare_func) GCompareFunc key_compare_func)
{ {
GRealHashTable *hash_table; GHashTable *hash_table;
gint i;
g_return_val_if_fail (hash_func != NULL, NULL);
hash_table = g_new (GHashTable, 1);
hash_table = g_new (GRealHashTable, 1); hash_table->size = HASH_TABLE_MIN_SIZE;
hash_table->size = 0;
hash_table->nnodes = 0; hash_table->nnodes = 0;
hash_table->frozen = FALSE; hash_table->frozen = FALSE;
hash_table->nodes = NULL; hash_table->hash_func = hash_func ? hash_func : g_direct_hash;
hash_table->hash_func = hash_func;
hash_table->key_compare_func = key_compare_func; hash_table->key_compare_func = key_compare_func;
hash_table->nodes = g_new (GHashNode*, hash_table->size);
for (i = 0; i < hash_table->size; i++)
hash_table->nodes[i] = NULL;
return ((GHashTable*) hash_table); return hash_table;
} }
void void
g_hash_table_destroy (GHashTable *hash_table) g_hash_table_destroy (GHashTable *hash_table)
{ {
GRealHashTable *rhash_table;
gint i; gint i;
if (hash_table) g_return_if_fail (hash_table);
{
rhash_table = (GRealHashTable*) hash_table; for (i = 0; i < hash_table->size; i++)
g_hash_nodes_destroy (hash_table->nodes[i]);
for (i = 0; i < rhash_table->size; i++)
g_hash_nodes_destroy (rhash_table->nodes[i]); g_free (hash_table->nodes);
g_free (hash_table);
if (rhash_table->nodes)
g_free (rhash_table->nodes);
g_free (rhash_table);
}
} }
void void
@@ -102,45 +97,28 @@ g_hash_table_insert (GHashTable *hash_table,
gpointer key, gpointer key,
gpointer value) gpointer value)
{ {
GRealHashTable *rhash_table; GHashNode **node;
GHashNode *node;
guint hash_val;
if (hash_table) g_return_if_fail (hash_table);
node = g_hash_table_lookup_node (hash_table, key);
if (*node)
{ {
rhash_table = (GRealHashTable*) hash_table; /* do not reset node->key in this place, keeping
* the old key might be intended.
if (rhash_table->size == 0) * a g_hash_table_remove/g_hash_table_insert pair
* can be used otherwise.
*
* node->key = key; */
(*node)->value = value;
}
else
{
*node = g_hash_node_new (key, value);
hash_table->nnodes++;
if (!hash_table->frozen)
g_hash_table_resize (hash_table); g_hash_table_resize (hash_table);
hash_val = (* rhash_table->hash_func) (key) % rhash_table->size;
node = rhash_table->nodes[hash_val];
while (node)
{
if ((rhash_table->key_compare_func &&
(* rhash_table->key_compare_func) (node->key, key)) ||
(node->key == key))
{
/* do not reset node->key in this place, keeping
* the old key might be intended.
* a g_hash_table_remove/g_hash_table_insert pair
* can be used otherwise.
*
* node->key = key;
*/
node->value = value;
return;
}
node = node->next;
}
node = g_hash_node_new (key, value);
node->next = rhash_table->nodes[hash_val];
rhash_table->nodes[hash_val] = node;
rhash_table->nnodes += 1;
g_hash_table_resize (hash_table);
} }
} }
@@ -148,110 +126,73 @@ void
g_hash_table_remove (GHashTable *hash_table, g_hash_table_remove (GHashTable *hash_table,
gconstpointer key) gconstpointer key)
{ {
GRealHashTable *rhash_table; GHashNode **node, *dest;
GHashNode *node;
GHashNode *prev;
guint hash_val;
rhash_table = (GRealHashTable*) hash_table; g_return_if_fail (hash_table);
if (hash_table && rhash_table->size)
while (*(node = g_hash_table_lookup_node (hash_table, key)))
{ {
hash_val = (* rhash_table->hash_func) (key) % rhash_table->size; dest = *node;
(*node) = dest->next;
prev = NULL; g_hash_node_destroy (dest);
node = rhash_table->nodes[hash_val]; hash_table->nnodes--;
while (node)
{
if ((rhash_table->key_compare_func &&
(* rhash_table->key_compare_func) (node->key, key)) ||
(node->key == key))
{
if (prev)
prev->next = node->next;
if (node == rhash_table->nodes[hash_val])
rhash_table->nodes[hash_val] = node->next;
g_hash_node_destroy (node);
rhash_table->nnodes -= 1;
g_hash_table_resize (hash_table);
break;
}
prev = node;
node = node->next;
}
} }
if (!hash_table->frozen)
g_hash_table_resize (hash_table);
} }
gpointer gpointer
g_hash_table_lookup (GHashTable *hash_table, g_hash_table_lookup (GHashTable *hash_table,
gconstpointer key) gconstpointer key)
{ {
GRealHashTable *rhash_table;
GHashNode *node; GHashNode *node;
guint hash_val;
g_return_val_if_fail (hash_table, NULL);
rhash_table = (GRealHashTable*) hash_table; node = *g_hash_table_lookup_node (hash_table, key);
if (hash_table && rhash_table->size) return node ? node->value : NULL;
}
gboolean
g_hash_table_lookup_full (GHashTable *hash_table,
gconstpointer lookup_key,
gpointer *orig_key,
gpointer *value)
{
GHashNode *node;
g_return_val_if_fail (hash_table, FALSE);
node = *g_hash_table_lookup_node (hash_table, lookup_key);
if (node)
{ {
hash_val = (* rhash_table->hash_func) (key) % rhash_table->size; if (orig_key)
*orig_key = node->key;
node = rhash_table->nodes[hash_val]; if (value)
*value = node->value;
/* Hash table lookup needs to be fast. return TRUE;
* We therefore remove the extra conditional of testing
* whether to call the key_compare_func or not from
* the inner loop.
*/
if (rhash_table->key_compare_func)
{
while (node)
{
if ((* rhash_table->key_compare_func) (node->key, key))
return node->value;
node = node->next;
}
}
else
{
while (node)
{
if (node->key == key)
return node->value;
node = node->next;
}
}
} }
else
return NULL; return FALSE;
} }
void void
g_hash_table_freeze (GHashTable *hash_table) g_hash_table_freeze (GHashTable *hash_table)
{ {
GRealHashTable *rhash_table; g_return_if_fail (hash_table);
if (hash_table) hash_table->frozen = TRUE;
{
rhash_table = (GRealHashTable*) hash_table;
rhash_table->frozen = TRUE;
}
} }
void void
g_hash_table_thaw (GHashTable *hash_table) g_hash_table_thaw (GHashTable *hash_table)
{ {
GRealHashTable *rhash_table; g_return_if_fail (hash_table);
if (hash_table) hash_table->frozen = FALSE;
{
rhash_table = (GRealHashTable*) hash_table;
rhash_table->frozen = FALSE;
g_hash_table_resize (hash_table); g_hash_table_resize (hash_table);
}
} }
void void
@@ -259,110 +200,96 @@ g_hash_table_foreach (GHashTable *hash_table,
GHFunc func, GHFunc func,
gpointer user_data) gpointer user_data)
{ {
GRealHashTable *rhash_table;
GHashNode *node; GHashNode *node;
gint i; gint i;
if (hash_table) g_return_if_fail (hash_table);
{
rhash_table = (GRealHashTable*) hash_table;
for (i = 0; i < rhash_table->size; i++) for (i = 0; i < hash_table->size; i++)
{ for (node = hash_table->nodes[i]; node; node = node->next)
node = rhash_table->nodes[i]; (* func) (node->key, node->value, user_data);
while (node)
{
(* func) (node->key, node->value, user_data);
node = node->next;
}
}
}
} }
/* Returns the number of elements contained in the hash table. */
gint g_hash_table_size (GHashTable *hash_table)
{
g_return_val_if_fail (hash_table, 0);
return hash_table->nnodes;
}
static void static void
g_hash_table_resize (GHashTable *hash_table) g_hash_table_resize (GHashTable *hash_table)
{ {
GRealHashTable *rhash_table;
GHashNode **new_nodes; GHashNode **new_nodes;
GHashNode *node; GHashNode *node;
GHashNode *next; GHashNode *next;
gfloat nodes_per_list; gfloat nodes_per_list;
guint hash_val; guint hash_val;
gint new_size; gint new_size;
gint need_resize;
gint i; gint i;
if (hash_table) g_return_if_fail (hash_table);
{
rhash_table = (GRealHashTable*) hash_table;
if (rhash_table->size == 0) nodes_per_list = (gfloat) hash_table->nnodes / (gfloat) hash_table->size;
{
rhash_table->size = HASH_TABLE_MIN_SIZE; if ((nodes_per_list > 0.3 || hash_table->size <= HASH_TABLE_MIN_SIZE) &&
rhash_table->nodes = g_new (GHashNode*, rhash_table->size); (nodes_per_list < 3.0 || hash_table->size >= HASH_TABLE_MAX_SIZE))
return;
for (i = 0; i < rhash_table->size; i++) new_size = CLAMP(g_hash_closest_prime (hash_table->nnodes),
rhash_table->nodes[i] = NULL; HASH_TABLE_MIN_SIZE,
} HASH_TABLE_MAX_SIZE);
else if (!rhash_table->frozen) new_nodes = g_new (GHashNode*, new_size);
{
need_resize = FALSE; for (i = 0; i < new_size; i++)
nodes_per_list = (gfloat) rhash_table->nnodes / (gfloat) rhash_table->size; new_nodes[i] = NULL;
for (i = 0; i < hash_table->size; i++)
for (node = hash_table->nodes[i]; node; node = next)
{
next = node->next;
hash_val = (* hash_table->hash_func) (node->key) % 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;
}
if (nodes_per_list < 0.3) static GHashNode **
{ g_hash_table_lookup_node (GHashTable *hash_table,
if (rhash_table->size > HASH_TABLE_MIN_SIZE) gconstpointer key)
need_resize = TRUE; {
} GHashNode **node;
else if (nodes_per_list > 3.0)
{ g_return_val_if_fail (hash_table, NULL);
if (rhash_table->size < HASH_TABLE_MAX_SIZE)
need_resize = TRUE;
}
if (need_resize) node = &hash_table->nodes
{ [(* hash_table->hash_func) (key) % hash_table->size];
new_size = g_hash_closest_prime (rhash_table->nnodes);
if (new_size < HASH_TABLE_MIN_SIZE)
new_size = HASH_TABLE_MIN_SIZE;
else if (new_size > HASH_TABLE_MAX_SIZE)
new_size = HASH_TABLE_MAX_SIZE;
new_nodes = g_new (GHashNode*, new_size); /* Hash table lookup needs to be fast.
* We therefore remove the extra conditional of testing
for (i = 0; i < new_size; i++) * whether to call the key_compare_func or not from
new_nodes[i] = NULL; * the inner loop.
*/
for (i = 0; i < rhash_table->size; i++) if (hash_table->key_compare_func)
{ while (*node && !(*hash_table->key_compare_func) ((*node)->key, key))
node = rhash_table->nodes[i]; node = &(*node)->next;
else
while (node) while (*node && (*node)->key != key)
{ node = &(*node)->next;
next = node->next;
return node;
hash_val = (* rhash_table->hash_func) (node->key) % new_size;
node->next = new_nodes[hash_val];
new_nodes[hash_val] = node;
node = next;
}
}
g_free (rhash_table->nodes);
rhash_table->nodes = new_nodes;
rhash_table->size = new_size;
}
}
}
} }
static gint static gint
g_hash_closest_prime (gint num) g_hash_closest_prime (gint num)
{ {
extern gint g_primes[];
extern gint g_nprimes;
gint i; gint i;
for (i = 0; i < g_nprimes; i++) for (i = 0; i < g_nprimes; i++)
@@ -403,11 +330,10 @@ g_hash_node_new (gpointer key,
static void static void
g_hash_node_destroy (GHashNode *hash_node) g_hash_node_destroy (GHashNode *hash_node)
{ {
if (hash_node) g_return_if_fail (hash_node);
{
hash_node->next = node_free_list; hash_node->next = node_free_list;
node_free_list = hash_node; node_free_list = hash_node;
}
} }
static void static void
@@ -415,20 +341,14 @@ g_hash_nodes_destroy (GHashNode *hash_node)
{ {
GHashNode *node; GHashNode *node;
if (hash_node) if (!hash_node)
{ return;
node = hash_node;
while (node->next)
node = node->next;
node->next = node_free_list;
node_free_list = hash_node;
}
}
/* Returns the number of elements contained in the hash table. */ node = hash_node;
gint g_hash_table_size (GHashTable *hash_table)
{
g_return_val_if_fail (hash_table, 0);
return ((GRealHashTable *) hash_table)->nnodes; while (node->next)
node = node->next;
node->next = node_free_list;
node_free_list = hash_node;
} }

37
glib/glib.h
View File

@@ -532,7 +532,6 @@ struct _GDebugKey
guint value; guint value;
}; };
struct _GHashTable { gint dummy; };
struct _GCache { gint dummy; }; struct _GCache { gint dummy; };
struct _GTree { gint dummy; }; struct _GTree { gint dummy; };
struct _GTimer { gint dummy; }; struct _GTimer { gint dummy; };
@@ -645,22 +644,26 @@ GListAllocator* g_list_set_allocator (GListAllocator* allocator);
/* Hash tables /* Hash tables
*/ */
GHashTable* g_hash_table_new (GHashFunc hash_func, GHashTable* g_hash_table_new (GHashFunc hash_func,
GCompareFunc key_compare_func); GCompareFunc key_compare_func);
void g_hash_table_destroy (GHashTable *hash_table); void g_hash_table_destroy (GHashTable *hash_table);
void g_hash_table_insert (GHashTable *hash_table, void g_hash_table_insert (GHashTable *hash_table,
gpointer key, gpointer key,
gpointer value); gpointer value);
void g_hash_table_remove (GHashTable *hash_table, void g_hash_table_remove (GHashTable *hash_table,
gconstpointer key); gconstpointer key);
gpointer g_hash_table_lookup (GHashTable *hash_table, gpointer g_hash_table_lookup (GHashTable *hash_table,
gconstpointer key); gconstpointer key);
void g_hash_table_freeze (GHashTable *hash_table); gboolean g_hash_table_lookup_full (GHashTable *hash_table,
void g_hash_table_thaw (GHashTable *hash_table); gconstpointer lookup_key,
void g_hash_table_foreach (GHashTable *hash_table, gpointer *orig_key,
GHFunc func, gpointer *value);
gpointer user_data); void g_hash_table_freeze (GHashTable *hash_table);
gint g_hash_table_size (GHashTable *hash_table); void g_hash_table_thaw (GHashTable *hash_table);
void g_hash_table_foreach (GHashTable *hash_table,
GHFunc func,
gpointer user_data);
gint g_hash_table_size (GHashTable *hash_table);
/* Caches /* Caches