COVERAGE_DEFINE(util_xalloc);
const char *program_name;
+static char *program_version;
void
out_of_memory(void)
return unknown;
}
-/* Sets program_name based on 'argv0'. Should be called at the beginning of
- * main(), as "set_program_name(argv[0]);". */
-void set_program_name(const char *argv0)
+/* Sets global "program_name" and "program_version" variables. Should
+ * be called at the beginning of main() with "argv[0]" as the argument
+ * to 'argv0'.
+ *
+ * The 'date' and 'time' arguments should likely be called with
+ * "__DATE__" and "__TIME__" to use the time the binary was built.
+ * Alternatively, the "set_program_name" macro may be called to do this
+ * automatically.
+ */
+void
+set_program_name__(const char *argv0, const char *date, const char *time)
{
const char *slash = strrchr(argv0, '/');
program_name = slash ? slash + 1 : argv0;
+
+ free(program_version);
+ program_version = xasprintf("%s (Open vSwitch) "VERSION BUILDNR"\n"
+ "Compiled %s %s\n",
+ program_name, date, time);
+}
+
+/* Returns a pointer to a string describing the program version. The
+ * caller must not modify or free the returned string.
+ */
+const char *
+get_program_version(void)
+{
+ return program_version;
}
/* Print the version information for the program. */
void
-ovs_print_version(char *date, char *time,
- uint8_t min_ofp, uint8_t max_ofp)
+ovs_print_version(uint8_t min_ofp, uint8_t max_ofp)
{
- printf("%s (Open vSwitch) "VERSION BUILDNR"\n", program_name);
- printf("Compiled %s %s\n", date, time);
+ printf("%s", program_version);
if (min_ofp || max_ofp) {
printf("OpenFlow versions %#x:%#x\n", min_ofp, max_ofp);
}
}
#endif
}
+
+/* Returns the number of trailing 0-bits in 'n', or 32 if 'n' is 0. */
+int
+ctz(uint32_t n)
+{
+ if (!n) {
+ return 32;
+ } else {
+#if !defined(UINT_MAX) || !defined(UINT32_MAX)
+#error "Someone screwed up the #includes."
+#elif __GNUC__ >= 4 && UINT_MAX == UINT32_MAX
+ return __builtin_ctz(n);
+#else
+ unsigned int k;
+ int count = 31;
+
+#define CTZ_STEP(X) \
+ k = n << (X); \
+ if (k) { \
+ count -= X; \
+ n = k; \
+ }
+ CTZ_STEP(16);
+ CTZ_STEP(8);
+ CTZ_STEP(4);
+ CTZ_STEP(2);
+ CTZ_STEP(1);
+#undef CTZ_STEP
+
+ return count;
+#endif
+ }
+}
+
+/* Returns true if the 'n' bytes starting at 'p' are zeros. */
+bool
+is_all_zeros(const uint8_t *p, size_t n)
+{
+ size_t i;
+
+ for (i = 0; i < n; i++) {
+ if (p[i] != 0x00) {
+ return false;
+ }
+ }
+ return true;
+}
+
+/* Returns true if the 'n' bytes starting at 'p' are 0xff. */
+bool
+is_all_ones(const uint8_t *p, size_t n)
+{
+ size_t i;
+
+ for (i = 0; i < n; i++) {
+ if (p[i] != 0xff) {
+ return false;
+ }
+ }
+ return true;
+}
+