/* An expandable hash tables datatype.
- Copyright (C) 1999-2020 Free Software Foundation, Inc.
+ Copyright (C) 1999-2024 Free Software Foundation, Inc.
Contributed by Vladimir Makarov (vmakarov@cygnus.com).
This file is part of the libiberty library.
static hashval_t hash_pointer (const void *);
static int eq_pointer (const void *, const void *);
static int htab_expand (htab_t);
-static PTR *find_empty_slot_for_expand (htab_t, hashval_t);
+static void **find_empty_slot_for_expand (htab_t, hashval_t);
/* At some point, we could make these be NULL, and modify the
hash-table routines to handle NULL specially; that would avoid
/* Returns non-zero if P1 and P2 are equal. */
static int
-eq_pointer (const PTR p1, const PTR p2)
+eq_pointer (const void *p1, const void *p2)
{
return p1 == p2;
}
result = (htab_t) (*alloc_f) (alloc_arg, 1, sizeof (struct htab));
if (result == NULL)
return NULL;
- result->entries = (PTR *) (*alloc_f) (alloc_arg, size, sizeof (PTR));
+ result->entries = (void **) (*alloc_f) (alloc_arg, size, sizeof (void *));
if (result->entries == NULL)
{
if (free_f != NULL)
result = (htab_t) (*alloc_tab_f) (1, sizeof (struct htab));
if (result == NULL)
return NULL;
- result->entries = (PTR *) (*alloc_f) (size, sizeof (PTR));
+ result->entries = (void **) (*alloc_f) (size, sizeof (void *));
if (result->entries == NULL)
{
if (free_f != NULL)
void
htab_set_functions_ex (htab_t htab, htab_hash hash_f, htab_eq eq_f,
- htab_del del_f, PTR alloc_arg,
+ htab_del del_f, void *alloc_arg,
htab_alloc_with_arg alloc_f, htab_free_with_arg free_f)
{
htab->hash_f = hash_f;
htab_delete (htab_t htab)
{
size_t size = htab_size (htab);
- PTR *entries = htab->entries;
+ void **entries = htab->entries;
int i;
if (htab->del_f)
htab_empty (htab_t htab)
{
size_t size = htab_size (htab);
- PTR *entries = htab->entries;
+ void **entries = htab->entries;
int i;
if (htab->del_f)
(*htab->del_f) (entries[i]);
/* Instead of clearing megabyte, downsize the table. */
- if (size > 1024*1024 / sizeof (PTR))
+ if (size > 1024*1024 / sizeof (void *))
{
- int nindex = higher_prime_index (1024 / sizeof (PTR));
+ int nindex = higher_prime_index (1024 / sizeof (void *));
int nsize = prime_tab[nindex].prime;
if (htab->free_f != NULL)
else if (htab->free_with_arg_f != NULL)
(*htab->free_with_arg_f) (htab->alloc_arg, htab->entries);
if (htab->alloc_with_arg_f != NULL)
- htab->entries = (PTR *) (*htab->alloc_with_arg_f) (htab->alloc_arg, nsize,
- sizeof (PTR *));
+ htab->entries = (void **) (*htab->alloc_with_arg_f) (htab->alloc_arg, nsize,
+ sizeof (void *));
else
- htab->entries = (PTR *) (*htab->alloc_f) (nsize, sizeof (PTR *));
+ htab->entries = (void **) (*htab->alloc_f) (nsize, sizeof (void *));
htab->size = nsize;
htab->size_prime_index = nindex;
}
else
- memset (entries, 0, size * sizeof (PTR));
+ memset (entries, 0, size * sizeof (void *));
htab->n_deleted = 0;
htab->n_elements = 0;
}
This function also assumes there are no deleted entries in the table.
HASH is the hash value for the element to be inserted. */
-static PTR *
+static void **
find_empty_slot_for_expand (htab_t htab, hashval_t hash)
{
hashval_t index = htab_mod (hash, htab);
size_t size = htab_size (htab);
- PTR *slot = htab->entries + index;
+ void **slot = htab->entries + index;
hashval_t hash2;
if (*slot == HTAB_EMPTY_ENTRY)
static int
htab_expand (htab_t htab)
{
- PTR *oentries;
- PTR *olimit;
- PTR *p;
- PTR *nentries;
+ void **oentries;
+ void **olimit;
+ void **p;
+ void **nentries;
size_t nsize, osize, elts;
unsigned int oindex, nindex;
}
if (htab->alloc_with_arg_f != NULL)
- nentries = (PTR *) (*htab->alloc_with_arg_f) (htab->alloc_arg, nsize,
- sizeof (PTR *));
+ nentries = (void **) (*htab->alloc_with_arg_f) (htab->alloc_arg, nsize,
+ sizeof (void *));
else
- nentries = (PTR *) (*htab->alloc_f) (nsize, sizeof (PTR *));
+ nentries = (void **) (*htab->alloc_f) (nsize, sizeof (void *));
if (nentries == NULL)
return 0;
htab->entries = nentries;
p = oentries;
do
{
- PTR x = *p;
+ void *x = *p;
if (x != HTAB_EMPTY_ENTRY && x != HTAB_DELETED_ENTRY)
{
- PTR *q = find_empty_slot_for_expand (htab, (*htab->hash_f) (x));
+ void **q = find_empty_slot_for_expand (htab, (*htab->hash_f) (x));
*q = x;
}
/* This function searches for a hash table entry equal to the given
element. It cannot be used to insert or delete an element. */
-PTR
-htab_find_with_hash (htab_t htab, const PTR element, hashval_t hash)
+void *
+htab_find_with_hash (htab_t htab, const void *element, hashval_t hash)
{
hashval_t index, hash2;
size_t size;
- PTR entry;
+ void *entry;
htab->searches++;
size = htab_size (htab);
/* Like htab_find_slot_with_hash, but compute the hash value from the
element. */
-PTR
-htab_find (htab_t htab, const PTR element)
+void *
+htab_find (htab_t htab, const void *element)
{
return htab_find_with_hash (htab, element, (*htab->hash_f) (element));
}
slot. When inserting an entry, NULL may be returned if memory
allocation fails. */
-PTR *
-htab_find_slot_with_hash (htab_t htab, const PTR element,
+void **
+htab_find_slot_with_hash (htab_t htab, const void *element,
hashval_t hash, enum insert_option insert)
{
- PTR *first_deleted_slot;
+ void **first_deleted_slot;
hashval_t index, hash2;
size_t size;
- PTR entry;
+ void *entry;
size = htab_size (htab);
if (insert == INSERT && size * 3 <= htab->n_elements * 4)
/* Like htab_find_slot_with_hash, but compute the hash value from the
element. */
-PTR *
-htab_find_slot (htab_t htab, const PTR element, enum insert_option insert)
+void **
+htab_find_slot (htab_t htab, const void *element, enum insert_option insert)
{
return htab_find_slot_with_hash (htab, element, (*htab->hash_f) (element),
insert);
element in the hash table, this function does nothing. */
void
-htab_remove_elt (htab_t htab, const PTR element)
+htab_remove_elt (htab_t htab, const void *element)
{
htab_remove_elt_with_hash (htab, element, (*htab->hash_f) (element));
}
function does nothing. */
void
-htab_remove_elt_with_hash (htab_t htab, const PTR element, hashval_t hash)
+htab_remove_elt_with_hash (htab_t htab, const void *element, hashval_t hash)
{
- PTR *slot;
+ void **slot;
slot = htab_find_slot_with_hash (htab, element, hash, NO_INSERT);
if (slot == NULL)
again. */
void
-htab_clear_slot (htab_t htab, PTR *slot)
+htab_clear_slot (htab_t htab, void **slot)
{
if (slot < htab->entries || slot >= htab->entries + htab_size (htab)
|| *slot == HTAB_EMPTY_ENTRY || *slot == HTAB_DELETED_ENTRY)
argument. */
void
-htab_traverse_noresize (htab_t htab, htab_trav callback, PTR info)
+htab_traverse_noresize (htab_t htab, htab_trav callback, void *info)
{
- PTR *slot;
- PTR *limit;
+ void **slot;
+ void **limit;
slot = htab->entries;
limit = slot + htab_size (htab);
do
{
- PTR x = *slot;
+ void *x = *slot;
if (x != HTAB_EMPTY_ENTRY && x != HTAB_DELETED_ENTRY)
if (!(*callback) (slot, info))
too empty to improve effectivity of subsequent calls. */
void
-htab_traverse (htab_t htab, htab_trav callback, PTR info)
+htab_traverse (htab_t htab, htab_trav callback, void *info)
{
size_t size = htab_size (htab);
if (htab_elements (htab) * 8 < size && size > 32)
function they just started using for Perl's hashes. */
hashval_t
-htab_hash_string (const PTR p)
+htab_hash_string (const void *p)
{
const unsigned char *str = (const unsigned char *) p;
hashval_t r = 0;
return r;
}
+/* An equality function for null-terminated strings. */
+int
+htab_eq_string (const void *a, const void *b)
+{
+ return strcmp ((const char *) a, (const char *) b) == 0;
+}
+
/* DERIVED FROM:
--------------------------------------------------------------------
lookup2.c, by Bob Jenkins, December 1996, Public Domain.
*/
hashval_t
-iterative_hash (const PTR k_in /* the key */,
+iterative_hash (const void *k_in /* the key */,
register size_t length /* the length of the key */,
register hashval_t initval /* the previous hash, or
an arbitrary value */)
/* Returns a hash code for pointer P. Simplified version of evahash */
static hashval_t
-hash_pointer (const PTR p)
+hash_pointer (const void *p)
{
intptr_t v = (intptr_t) p;
unsigned a, b, c;
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