dedup

commit 7f984c9b4136d768e72f31d99666b72bca12d7f2
parent 4898c6cfb92a378928c29895d4ca55536121b52d
Author: sin <sin@2f30.org>
Date:   Sun,  7 Apr 2019 12:52:00 +0100

Re-organize flags a bit

We might want to support more than one compression algo in the future.
Reserve 2 bits for that field.

Diffstat:
M
dedup.h
 | 
7
+++----

1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/dedup.h b/dedup.h
@@ -22,11 +22,10 @@
 #define VER_MAJ_SHIFT	8
 #define VER_MAJ_MASK	0xff
 
+#define HASH_ALGO_SHIFT		18
+#define HASH_ALGO_MASK		0x7	/* max 8 hash algos */
 #define COMPR_ENABLED_SHIFT	16
-#define COMPR_ENABLED_MASK	0x1
-
-#define HASH_ALGO_SHIFT	17
-#define HASH_ALGO_MASK	0x7	/* max 8 hash algos */
+#define COMPR_ENABLED_MASK	0x3	/* max 4 compression algos */
 
 enum hash_algo {
 	BLAKE2B_ALGO,