1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/* Set operations on pointers
Copyright (C) 2004-2014 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef POINTER_SET_H
#define POINTER_SET_H
/* A pointer set is represented as a simple open-addressing hash
table. Simplifications: The hash code is based on the value of the
pointer, not what it points to. The number of buckets is always a
power of 2. Null pointers are a reserved value. Deletion is not
supported (yet). There is no mechanism for user control of hash
function, equality comparison, initial size, or resizing policy. */
struct pointer_set_t
{
size_t log_slots;
size_t n_slots; /* n_slots = 2^log_slots */
size_t n_elements;
const void **slots;
};
struct pointer_set_t *pointer_set_create (void);
void pointer_set_destroy (struct pointer_set_t *pset);
int pointer_set_contains (const struct pointer_set_t *pset, const void *p);
int pointer_set_insert (struct pointer_set_t *pset, const void *p);
void pointer_set_traverse (const struct pointer_set_t *,
bool (*) (const void *, void *),
void *);
bool pointer_set_lookup (const pointer_set_t *, const void *, size_t *);
struct pointer_map_t;
pointer_map_t *pointer_map_create (void);
void pointer_map_destroy (pointer_map_t *pmap);
void **pointer_map_contains (const pointer_map_t *pmap, const void *p);
void **pointer_map_insert (pointer_map_t *pmap, const void *p);
void pointer_map_traverse (const pointer_map_t *,
bool (*) (const void *, void **, void *), void *);
#endif /* POINTER_SET_H */
|
