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util: New function bitwise_one().
[openvswitch]
/
lib
/
util.h
diff --git
a/lib/util.h
b/lib/util.h
index d504f2fe9cb09f05954f7db3bd8be0f3888a476a..63f4a240a61b77c7ab705a11fe9e1fd10efbb62c 100644
(file)
--- a/
lib/util.h
+++ b/
lib/util.h
@@
-78,6
+78,20
@@
extern const char *program_name;
/* Returns true if X is a power of 2, otherwise false. */
#define IS_POW2(X) ((X) && !((X) & ((X) - 1)))
/* Returns true if X is a power of 2, otherwise false. */
#define IS_POW2(X) ((X) && !((X) & ((X) - 1)))
+static inline bool
+is_pow2(uintmax_t x)
+{
+ return IS_POW2(x);
+}
+
+/* Returns the rightmost 1-bit in 'x' (e.g. 01011000 => 00001000), or 0 if 'x'
+ * is 0. */
+static inline uintmax_t
+rightmost_1bit(uintmax_t x)
+{
+ return x & -x;
+}
+
#ifndef MIN
#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
#endif
#ifndef MIN
#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
#endif
@@
-148,9
+162,10
@@
extern const char *program_name;
extern "C" {
#endif
extern "C" {
#endif
-void set_program_name__(const char *name, const char *date, const char *time);
+void set_program_name__(const char *name, const char *version,
+ const char *date, const char *time);
#define set_program_name(name) \
#define set_program_name(name) \
- set_program_name__(name, __DATE__, __TIME__)
+ set_program_name__(name,
VERSION,
__DATE__, __TIME__)
const char *get_program_version(void);
void ovs_print_version(uint8_t min_ofp, uint8_t max_ofp);
const char *get_program_version(void);
void ovs_print_version(uint8_t min_ofp, uint8_t max_ofp);
@@
-213,6
+228,8
@@
void bitwise_copy(const void *src, unsigned int src_len, unsigned int src_ofs,
unsigned int n_bits);
void bitwise_zero(void *dst_, unsigned int dst_len, unsigned dst_ofs,
unsigned int n_bits);
unsigned int n_bits);
void bitwise_zero(void *dst_, unsigned int dst_len, unsigned dst_ofs,
unsigned int n_bits);
+void bitwise_one(void *dst_, unsigned int dst_len, unsigned dst_ofs,
+ unsigned int n_bits);
void bitwise_put(uint64_t value,
void *dst, unsigned int dst_len, unsigned int dst_ofs,
unsigned int n_bits);
void bitwise_put(uint64_t value,
void *dst, unsigned int dst_len, unsigned int dst_ofs,
unsigned int n_bits);