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-rw-r--r--lib/bitops.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/bitops.h b/lib/bitops.h
index bebd830d..a12f6b60 100644
--- a/lib/bitops.h
+++ b/lib/bitops.h
@@ -6,6 +6,9 @@
* Can be freely distributed and used under the terms of the GNU GPL.
*/
+#ifndef _BIRD_BITOPTS_H_
+#define _BIRD_BITOPTS_H_
+
/*
* Bit mask operations:
*
@@ -19,3 +22,8 @@ u32 u32_mkmask(unsigned n);
int u32_masklen(u32 x);
u32 u32_log2(u32 v);
+
+static inline u32 u32_hash(u32 v) { return v * 2902958171u; }
+
+#endif
+