extern const char *program_name;
+#define __ARRAY_SIZE_NOCHECK(ARRAY) (sizeof(ARRAY) / sizeof((ARRAY)[0]))
+#ifdef __GNUC__
+/* return 0 for array types, 1 otherwise */
+#define __ARRAY_CHECK(ARRAY) \
+ !__builtin_types_compatible_p(typeof(ARRAY), typeof(&ARRAY[0]))
+
+/* compile-time fail if not array */
+#define __ARRAY_FAIL(ARRAY) (sizeof(char[-2*!__ARRAY_CHECK(ARRAY)]))
+#define __ARRAY_SIZE(ARRAY) \
+ __builtin_choose_expr(__ARRAY_CHECK(ARRAY), \
+ __ARRAY_SIZE_NOCHECK(ARRAY), __ARRAY_FAIL(ARRAY))
+#else
+#define __ARRAY_SIZE(ARRAY) __ARRAY_SIZE_NOCHECK(ARRAY)
+#endif
+
/* Returns the number of elements in ARRAY. */
-#define ARRAY_SIZE(ARRAY) (sizeof ARRAY / sizeof *ARRAY)
+#define ARRAY_SIZE(ARRAY) __ARRAY_SIZE(ARRAY)
/* Returns X / Y, rounding up. X must be nonnegative to round correctly. */
#define DIV_ROUND_UP(X, Y) (((X) + ((Y) - 1)) / (Y))
* (void *). This is to suppress the alignment warning issued by clang. */
#define ALIGNED_CAST(TYPE, ATTR) ((TYPE) (void *) (ATTR))
+/* Use "%"PRIuSIZE to format size_t with printf(). */
+#ifdef _WIN32
+#define PRIdSIZE "Id"
+#define PRIiSIZE "Ii"
+#define PRIoSIZE "Io"
+#define PRIuSIZE "Iu"
+#define PRIxSIZE "Ix"
+#define PRIXSIZE "IX"
+#else
+#define PRIdSIZE "zd"
+#define PRIiSIZE "zi"
+#define PRIoSIZE "zo"
+#define PRIuSIZE "zu"
+#define PRIxSIZE "zx"
+#define PRIXSIZE "zX"
+#endif
+
#ifdef __cplusplus
extern "C" {
#endif
set_program_name__(name, VERSION, __DATE__, __TIME__)
const char *get_subprogram_name(void);
-void set_subprogram_name(const char *name);
+void set_subprogram_name(const char *format, ...) PRINTF_FORMAT(1, 2);
const char *get_program_version(void);
void ovs_print_version(uint8_t min_ofp, uint8_t max_ofp);
bool str_to_ulong(const char *, int base, unsigned long *);
bool str_to_ullong(const char *, int base, unsigned long long *);
+bool ovs_scan(const char *s, const char *template, ...) SCANF_FORMAT(2, 3);
+
bool str_to_double(const char *, double *);
int hexit_value(int c);
\f
/* Bitwise tests. */
-/* Returns the number of trailing 0-bits in 'n'. Undefined if 'n' == 0.
- *
- * This compiles to a single machine instruction ("bsf") with GCC on x86. */
-#if !defined(UINT_MAX) || !defined(UINT32_MAX)
-#error "Someone screwed up the #includes."
-#elif __GNUC__ >= 4 && UINT_MAX == UINT32_MAX
+int log_2_floor(uint32_t);
+int log_2_ceil(uint32_t);
+unsigned int count_1bits(uint64_t);
+
+/* Returns the number of trailing 0-bits in 'n'. Undefined if 'n' == 0. */
+#if __GNUC__ >= 4
static inline int
-raw_ctz(uint32_t n)
+raw_ctz(uint64_t n)
{
- return __builtin_ctz(n);
+ /* With GCC 4.7 on 32-bit x86, if a 32-bit integer is passed as 'n', using
+ * a plain __builtin_ctzll() here always generates an out-of-line function
+ * call. The test below helps it to emit a single 'bsf' instruction. */
+ return (__builtin_constant_p(n <= UINT32_MAX) && n <= UINT32_MAX
+ ? __builtin_ctz(n)
+ : __builtin_ctzll(n));
}
#else
/* Defined in util.c. */
-int raw_ctz(uint32_t n);
+int raw_ctz(uint64_t n);
#endif
/* Returns the number of trailing 0-bits in 'n', or 32 if 'n' is 0. */
return n ? raw_ctz(n) : 32;
}
-int log_2_floor(uint32_t);
-int log_2_ceil(uint32_t);
-unsigned int popcount(uint32_t);
+/* Returns the number of trailing 0-bits in 'n', or 64 if 'n' is 0. */
+static inline int
+ctz64(uint64_t n)
+{
+ return n ? raw_ctz(n) : 64;
+}
/* Returns the rightmost 1-bit in 'x' (e.g. 01011000 => 00001000), or 0 if 'x'
* is 0. */