range.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _LINUX_RANGE_H
 3#define _LINUX_RANGE_H
 4#include <linux/types.h>
 5
 6struct range {
 7	u64   start;
 8	u64   end;
 9};
10
11static inline u64 range_len(const struct range *range)
12{
13	return range->end - range->start + 1;
14}
15
16/* True if r1 completely contains r2 */
17static inline bool range_contains(const struct range *r1,
18				  const struct range *r2)
19{
20	return r1->start <= r2->start && r1->end >= r2->end;
21}
22
23/* True if any part of r1 overlaps r2 */
24static inline bool range_overlaps(const struct range *r1,
25				  const struct range *r2)
26{
27	return r1->start <= r2->end && r1->end >= r2->start;
28}
29
30int add_range(struct range *range, int az, int nr_range,
31		u64 start, u64 end);
32
33
34int add_range_with_merge(struct range *range, int az, int nr_range,
35				u64 start, u64 end);
36
37void subtract_range(struct range *range, int az, u64 start, u64 end);
38
39int clean_sort_range(struct range *range, int az);
40
41void sort_range(struct range *range, int nr_range);
42
43#define DEFINE_RANGE(_start, _end)		\
44(struct range) {				\
45		.start = (_start),		\
46		.end = (_end),			\
47	}
48
49#endif