#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
#include "compiler.h"
#define BUILD_ASSERT_DECL_GCCONLY(EXPR) ((void) 0)
#endif
+/* Like the standard assert macro, except:
+ *
+ * - Writes the failure message to the log.
+ *
+ * - Not affected by NDEBUG. */
+#define ovs_assert(CONDITION) \
+ if (!OVS_LIKELY(CONDITION)) { \
+ ovs_assert_failure(SOURCE_LOCATOR, __func__, #CONDITION); \
+ }
+void ovs_assert_failure(const char *, const char *, const char *) NO_RETURN;
+
/* Casts 'pointer' to 'type' and issues a compiler warning if the cast changes
* anything other than an outermost "const" or "volatile" qualifier.
*
int log_2_floor(uint32_t);
int log_2_ceil(uint32_t);
-int popcount(uint32_t);
+unsigned int popcount(uint32_t);
/* Returns the rightmost 1-bit in 'x' (e.g. 01011000 => 00001000), or 0 if 'x'
* is 0. */
{
return x & (x - 1);
}
+
+/* Returns the index of the rightmost 1-bit in 'x' (e.g. 01011000 => 3), or 32
+ * if 'x' is 0.
+ *
+ * Unlike the other functions for rightmost 1-bits, this function only works
+ * with 32-bit integers. */
+static inline uint32_t
+rightmost_1bit_idx(uint32_t x)
+{
+ return x ? ctz(x) : 32;
+}
+
+/* Returns the index of the rightmost 1-bit in 'x' (e.g. 01011000 => 6), or 32
+ * if 'x' is 0.
+ *
+ * This function only works with 32-bit integers. */
+static inline uint32_t
+leftmost_1bit_idx(uint32_t x)
+{
+ return x ? log_2_floor(x) : 32;
+}
\f
bool is_all_zeros(const uint8_t *, size_t);
bool is_all_ones(const uint8_t *, size_t);