1 /* hash.c -- gas hash table code
2 Copyright (C) 1987-2024 Free Software Foundation, Inc.
3
4 This file is part of GAS, the GNU Assembler.
5
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
9 any later version.
10
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
19 02110-1301, USA. */
20
21 #include "as.h"
22
23 /* Hash function for a string_tuple. */
24
25 hashval_t
hash_string_tuple(const void * e)26 hash_string_tuple (const void *e)
27 {
28 string_tuple_t *tuple = (string_tuple_t *) e;
29 return htab_hash_string (tuple->key);
30 }
31
32 /* Equality function for a string_tuple. */
33
34 int
eq_string_tuple(const void * a,const void * b)35 eq_string_tuple (const void *a, const void *b)
36 {
37 const string_tuple_t *ea = (const string_tuple_t *) a;
38 const string_tuple_t *eb = (const string_tuple_t *) b;
39
40 return strcmp (ea->key, eb->key) == 0;
41 }
42
43 /* Insert ELEMENT into HTAB. If REPLACE is non-zero existing elements
44 are overwritten. If ELEMENT already exists, a pointer to the slot
45 is returned. Otherwise NULL is returned. */
46
47 void **
htab_insert(htab_t htab,void * element,int replace)48 htab_insert (htab_t htab, void *element, int replace)
49 {
50 void **slot = htab_find_slot (htab, element, INSERT);
51 if (*slot != NULL)
52 {
53 if (replace)
54 {
55 if (htab->del_f)
56 (*htab->del_f) (*slot);
57 *slot = element;
58 }
59 return slot;
60 }
61 *slot = element;
62 return NULL;
63 }
64
65 /* Print statistics about a hash table. */
66
67 void
htab_print_statistics(FILE * f,const char * name,htab_t table)68 htab_print_statistics (FILE *f, const char *name, htab_t table)
69 {
70 fprintf (f, "%s hash statistics:\n", name);
71 fprintf (f, "\t%u searches\n", table->searches);
72 fprintf (f, "\t%u collisions\n", table->collisions);
73 fprintf (f, "\t%lu elements\n", (unsigned long) htab_elements (table));
74 fprintf (f, "\t%lu table size\n", (unsigned long) htab_size (table));
75 }
76