1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * tools/testing/selftests/kvm/include/sparsebit.h
5 * Copyright (C) 2018, Google LLC.
7 * Header file that describes API to the sparsebit library.
8 * This library provides a memory efficient means of storing
9 * the settings of bits indexed via a uint64_t. Memory usage
10 * is reasonable, significantly less than (2^64 / 8) bytes, as
11 * long as bits that are mostly set or mostly cleared are close
12 * to each other. This library is efficient in memory usage
13 * even in the case where most bits are set.
16 #ifndef SELFTEST_KVM_SPARSEBIT_H
17 #define SELFTEST_KVM_SPARSEBIT_H
28 typedef uint64_t sparsebit_idx_t;
29 typedef uint64_t sparsebit_num_t;
31 struct sparsebit *sparsebit_alloc(void);
32 void sparsebit_free(struct sparsebit **sbitp);
33 void sparsebit_copy(struct sparsebit *dstp, struct sparsebit *src);
35 bool sparsebit_is_set(struct sparsebit *sbit, sparsebit_idx_t idx);
36 bool sparsebit_is_set_num(struct sparsebit *sbit,
37 sparsebit_idx_t idx, sparsebit_num_t num);
38 bool sparsebit_is_clear(struct sparsebit *sbit, sparsebit_idx_t idx);
39 bool sparsebit_is_clear_num(struct sparsebit *sbit,
40 sparsebit_idx_t idx, sparsebit_num_t num);
41 sparsebit_num_t sparsebit_num_set(struct sparsebit *sbit);
42 bool sparsebit_any_set(struct sparsebit *sbit);
43 bool sparsebit_any_clear(struct sparsebit *sbit);
44 bool sparsebit_all_set(struct sparsebit *sbit);
45 bool sparsebit_all_clear(struct sparsebit *sbit);
46 sparsebit_idx_t sparsebit_first_set(struct sparsebit *sbit);
47 sparsebit_idx_t sparsebit_first_clear(struct sparsebit *sbit);
48 sparsebit_idx_t sparsebit_next_set(struct sparsebit *sbit, sparsebit_idx_t prev);
49 sparsebit_idx_t sparsebit_next_clear(struct sparsebit *sbit, sparsebit_idx_t prev);
50 sparsebit_idx_t sparsebit_next_set_num(struct sparsebit *sbit,
51 sparsebit_idx_t start, sparsebit_num_t num);
52 sparsebit_idx_t sparsebit_next_clear_num(struct sparsebit *sbit,
53 sparsebit_idx_t start, sparsebit_num_t num);
55 void sparsebit_set(struct sparsebit *sbitp, sparsebit_idx_t idx);
56 void sparsebit_set_num(struct sparsebit *sbitp, sparsebit_idx_t start,
58 void sparsebit_set_all(struct sparsebit *sbitp);
60 void sparsebit_clear(struct sparsebit *sbitp, sparsebit_idx_t idx);
61 void sparsebit_clear_num(struct sparsebit *sbitp,
62 sparsebit_idx_t start, sparsebit_num_t num);
63 void sparsebit_clear_all(struct sparsebit *sbitp);
65 void sparsebit_dump(FILE *stream, struct sparsebit *sbit,
67 void sparsebit_validate_internal(struct sparsebit *sbit);
73 #endif /* SELFTEST_KVM_SPARSEBIT_H */