2 * Copyright (c) 2016-2017 Dmitry V. Levin <ldv@altlinux.org>
5 * SPDX-License-Identifier: LGPL-2.1-or-later
15 #include "number_set.h"
18 typedef unsigned int number_slot_t;
19 #define BITS_PER_SLOT (sizeof(number_slot_t) * 8)
28 number_setbit(const unsigned int i, number_slot_t *const vec)
30 vec[i / BITS_PER_SLOT] |= (number_slot_t) 1 << (i % BITS_PER_SLOT);
34 number_isset(const unsigned int i, const number_slot_t *const vec)
36 return vec[i / BITS_PER_SLOT] & ((number_slot_t) 1 << (i % BITS_PER_SLOT));
40 reallocate_number_set(struct number_set *const set, const unsigned int new_nslots)
42 if (new_nslots <= set->nslots)
44 set->vec = xreallocarray(set->vec, new_nslots, sizeof(*set->vec));
45 memset(set->vec + set->nslots, 0,
46 sizeof(*set->vec) * (new_nslots - set->nslots));
47 set->nslots = new_nslots;
51 number_set_array_is_empty(const struct number_set *const set,
52 const unsigned int idx)
54 return !(set && (set[idx].nslots || set[idx].not));
58 is_number_in_set(const unsigned int number, const struct number_set *const set)
60 return set && ((number / BITS_PER_SLOT < set->nslots)
61 && number_isset(number, set->vec)) ^ set->not;
65 is_number_in_set_array(const unsigned int number, const struct number_set *const set,
66 const unsigned int idx)
68 return set && ((number / BITS_PER_SLOT < set[idx].nslots)
69 && number_isset(number, set[idx].vec)) ^ set[idx].not;
73 add_number_to_set(const unsigned int number, struct number_set *const set)
75 reallocate_number_set(set, number / BITS_PER_SLOT + 1);
76 number_setbit(number, set->vec);
80 add_number_to_set_array(const unsigned int number, struct number_set *const set,
81 const unsigned int idx)
83 add_number_to_set(number, &set[idx]);
87 clear_number_set_array(struct number_set *const set, const unsigned int nmemb)
91 for (i = 0; i < nmemb; ++i) {
94 sizeof(*set[i].vec) * set[i].nslots);
100 invert_number_set_array(struct number_set *const set, const unsigned int nmemb)
104 for (i = 0; i < nmemb; ++i)
105 set[i].not = !set[i].not;
109 alloc_number_set_array(const unsigned int nmemb)
111 return xcalloc(nmemb, sizeof(struct number_set));
115 free_number_set_array(struct number_set *const set, unsigned int nmemb)
119 free(set[nmemb].vec);
120 set[nmemb].vec = NULL;