Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
include/qemu/range.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/include/qemu/range.h b/include/qemu/range.h
index 4a0780d..1c688ca 100644
--- a/include/qemu/range.h
+++ b/include/qemu/range.h
@@ -17,6 +17,23 @@ 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;
+ }
+ 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)
--
MST
