Lib: Add common macros for undefined integer values in config

diff --git a/lib/birdlib.h b/lib/birdlib.h
index 807efa22be9126685a027f266eae840c545dac8a..eb727c9d3edf7bff7636521f36e4d6add224275d 100644 (file)
--- a/lib/birdlib.h
+++ b/lib/birdlib.h
@@ -51,6 +51,9 @@ static inline int uint_cmp(uint i1, uint i2)
 static inline int u64_cmp(u64 i1, u64 i2)
 { return (int)(i1 > i2) - (int)(i1 < i2); }
 
+#define U32_UNDEF ((u32) -1)
+#define U64_UNDEF ((u64) -1)
+
 
 /* Bitfield macros */