]> git.proxmox.com Git - mirror_qemu.git/blame - range.h
MAINTAINERS: Add qemu-ppc to all ppc target stuff
[mirror_qemu.git] / range.h
CommitLineData
bf1b0071
BS
1#ifndef QEMU_RANGE_H
2#define QEMU_RANGE_H
3
4/* Get last byte of a range from offset + length.
5 * Undefined for ranges that wrap around 0. */
6static inline uint64_t range_get_last(uint64_t offset, uint64_t len)
7{
8 return offset + len - 1;
9}
10
11/* Check whether a given range covers a given byte. */
12static inline int range_covers_byte(uint64_t offset, uint64_t len,
13 uint64_t byte)
14{
15 return offset <= byte && byte <= range_get_last(offset, len);
16}
17
18/* Check whether 2 given ranges overlap.
19 * Undefined if ranges that wrap around 0. */
20static inline int ranges_overlap(uint64_t first1, uint64_t len1,
21 uint64_t first2, uint64_t len2)
22{
23 uint64_t last1 = range_get_last(first1, len1);
24 uint64_t last2 = range_get_last(first2, len2);
25
26 return !(last2 < first1 || last1 < first2);
27}
28
29#endif