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-rw-r--r--src/common.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/src/common.h b/src/common.h
index f9d9f77..b1c3273 100644
--- a/src/common.h
+++ b/src/common.h
@@ -54,9 +54,11 @@
#define SYSCALL(call) while (((call) == -1) && (errno == EINTR))
-#define GETBIT(m, x) ((m>>(x))&1U)
-#define SETBIT(m, x) (m|=(1U<<(x)))
-#define CLEARBIT(m, x) (m&=~(1U<<(x)))
+#define BITMASK(x) (1U << (x))
+#define BITONES(x) (BITMASK(x) - 1U)
+#define GETBIT(m, x) (((m) >> (x)) & 1U)
+#define SETBIT(m, x) (m |= BITMASK(x))
+#define CLEARBIT(m, x) (m &= ~BITMASK(x))
////////////////////////////////////////////////////////