Commit c5a22c43 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin

range: add min/max operations on ranges

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent cfe25e2b
......@@ -17,6 +17,24 @@ struct Range {
uint64_t end; /* 1 + the last byte. 0 if range empty or ends at ~0x0LL. */
};
static inline void range_extend(Range *range, Range *extend_by)
{
if (!extend_by->begin && !extend_by->end) {
return;
}
if (!range->begin && !range->end) {
*range = *extend_by;
return;
}
if (range->begin > extend_by->begin) {
range->begin = extend_by->begin;
}
/* Compare last byte in case region ends at ~0x0LL */
if (range->end - 1 < extend_by->end - 1) {
range->end = extend_by->end;
}
}
/* 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)
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment