csum: xxhash: make finish_running_checksum's digest optional

If NULL is passed, then the function can be used to free the structure without returning the digest. Signed-off-by: Alexandre Bruyelles <[email protected]>
markfasheh · Nov 17, 2023 · dc4e356 · dc4e356
1 parent 98c0b8b
commit dc4e356
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/csum-xxhash.c b/csum-xxhash.c
@@ -64,8 +64,10 @@ static void xxhash_finish_running_checksum(struct running_checksum *_c,
 
 	XXH128_hash_t hash = XXH3_128bits_digest(c->state);
 
-	((uint64_t*)digest)[0] = hash.low64;
-	((uint64_t*)digest)[1] = hash.high64;
+	if (digest) {
+		((uint64_t*)digest)[0] = hash.low64;
+		((uint64_t*)digest)[1] = hash.high64;
+	}
 	XXH3_freeState(c->state);
 }