mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-23 19:49:43 +00:00
bf1b007123
Extract range functions from pci.h. These will be used by later patches by non-PCI devices. Adjust current users. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
30 lines
867 B
C
30 lines
867 B
C
#ifndef QEMU_RANGE_H
|
|
#define QEMU_RANGE_H
|
|
|
|
/* Get last byte of a range from offset + length.
|
|
* Undefined for ranges that wrap around 0. */
|
|
static inline uint64_t range_get_last(uint64_t offset, uint64_t len)
|
|
{
|
|
return offset + len - 1;
|
|
}
|
|
|
|
/* Check whether a given range covers a given byte. */
|
|
static inline int range_covers_byte(uint64_t offset, uint64_t len,
|
|
uint64_t byte)
|
|
{
|
|
return offset <= byte && byte <= range_get_last(offset, len);
|
|
}
|
|
|
|
/* Check whether 2 given ranges overlap.
|
|
* Undefined if ranges that wrap around 0. */
|
|
static inline int ranges_overlap(uint64_t first1, uint64_t len1,
|
|
uint64_t first2, uint64_t len2)
|
|
{
|
|
uint64_t last1 = range_get_last(first1, len1);
|
|
uint64_t last2 = range_get_last(first2, len2);
|
|
|
|
return !(last2 < first1 || last1 < first2);
|
|
}
|
|
|
|
#endif
|