mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/* hash.h -- header file for gas hash table routines
|
|
Copyright (C) 1987-2021 Free Software Foundation, Inc.
|
|
|
|
This file is part of GAS, the GNU Assembler.
|
|
|
|
GAS is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3, or (at your option)
|
|
any later version.
|
|
|
|
GAS 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GAS; see the file COPYING. If not, write to the Free
|
|
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
|
|
02110-1301, USA. */
|
|
|
|
#ifndef HASH_H
|
|
#define HASH_H
|
|
|
|
/* Insert ELEMENT into HTAB. If REPLACE is non-zero existing elements
|
|
are overwritten. If ELEMENT already exists, a pointer to the slot
|
|
is returned. Otherwise NULL is returned. */
|
|
|
|
extern void **htab_insert (htab_t, void * /* element */, int /* replace */);
|
|
|
|
/* Print statistics about a hash table. */
|
|
|
|
extern void htab_print_statistics (FILE *f, const char *name, htab_t table);
|
|
|
|
/* String hash table functions. */
|
|
|
|
struct string_tuple
|
|
{
|
|
const char *key;
|
|
const void *value;
|
|
};
|
|
|
|
typedef struct string_tuple string_tuple_t;
|
|
|
|
/* Hash function for a string_tuple. */
|
|
|
|
static hashval_t
|
|
hash_string_tuple (const void *e)
|
|
{
|
|
string_tuple_t *tuple = (string_tuple_t *) e;
|
|
return htab_hash_string (tuple->key);
|
|
}
|
|
|
|
/* Equality function for a string_tuple. */
|
|
|
|
static int
|
|
eq_string_tuple (const void *a, const void *b)
|
|
{
|
|
const string_tuple_t *ea = (const string_tuple_t *) a;
|
|
const string_tuple_t *eb = (const string_tuple_t *) b;
|
|
|
|
return strcmp (ea->key, eb->key) == 0;
|
|
}
|
|
|
|
static inline string_tuple_t *
|
|
string_tuple_alloc (const char *key, const void *value)
|
|
{
|
|
string_tuple_t *tuple = XNEW (string_tuple_t);
|
|
tuple->key = key;
|
|
tuple->value = value;
|
|
return tuple;
|
|
}
|
|
|
|
static inline void *
|
|
str_hash_find (htab_t table, const char *key)
|
|
{
|
|
string_tuple_t needle = { key, NULL };
|
|
string_tuple_t *tuple = htab_find (table, &needle);
|
|
return tuple != NULL ? (void *) tuple->value : NULL;
|
|
}
|
|
|
|
static inline void *
|
|
str_hash_find_n (htab_t table, const char *key, size_t n)
|
|
{
|
|
char *tmp = XNEWVEC (char, n + 1);
|
|
memcpy (tmp, key, n);
|
|
tmp[n] = '\0';
|
|
string_tuple_t needle = { tmp, NULL };
|
|
string_tuple_t *tuple = htab_find (table, &needle);
|
|
free (tmp);
|
|
return tuple != NULL ? (void *) tuple->value : NULL;
|
|
}
|
|
|
|
static inline void
|
|
str_hash_delete (htab_t table, const char *key)
|
|
{
|
|
string_tuple_t needle = { key, NULL };
|
|
htab_remove_elt (table, &needle);
|
|
}
|
|
|
|
static inline void **
|
|
str_hash_insert (htab_t table, const char *key, const void *value, int replace)
|
|
{
|
|
string_tuple_t *elt = string_tuple_alloc (key, value);
|
|
void **slot = htab_insert (table, elt, replace);
|
|
if (slot && !replace)
|
|
free (elt);
|
|
return slot;
|
|
}
|
|
|
|
static inline htab_t
|
|
str_htab_create (void)
|
|
{
|
|
return htab_create_alloc (16, hash_string_tuple, eq_string_tuple,
|
|
NULL, xcalloc, free);
|
|
}
|
|
|
|
#endif /* HASH_H */
|