X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fcommon.h;h=85db3adb35faf5981477b1dd90179f6aaffa9c6b;hb=a1ae4b5afaf3207a7070b85f802b41b32c0b9a20;hp=a5e2167b6c1e3565a96d2e399aee0616923f3133;hpb=10075e6fe3c384b73c2dd398a1435f8d10e56654;p=collectd.git

diff --git a/src/common.h b/src/common.h
index a5e2167b..85db3adb 100644
--- a/src/common.h
+++ b/src/common.h
@@ -31,13 +31,22 @@
 #endif
 
 #define sfree(ptr) \
-	if((ptr) != NULL) { \
-		free(ptr); \
-	} \
-	(ptr) = NULL
+	do { \
+		if((ptr) != NULL) { \
+			free(ptr); \
+		} \
+		(ptr) = NULL; \
+	} while (0)
 
 #define STATIC_ARRAY_SIZE(a) (sizeof (a) / sizeof (*(a)))
 
+#define IS_TRUE(s) ((strcasecmp ("true", (s)) == 0) \
+		|| (strcasecmp ("yes", (s)) == 0) \
+		|| (strcasecmp ("on", (s)) == 0))
+#define IS_FALSE(s) ((strcasecmp ("false", (s)) == 0) \
+		|| (strcasecmp ("no", (s)) == 0) \
+		|| (strcasecmp ("off", (s)) == 0))
+
 char *sstrncpy (char *dest, const char *src, size_t n);
 int ssnprintf (char *dest, size_t n, const char *format, ...);
 char *sstrdup(const char *s);
@@ -151,8 +160,27 @@ int escape_slashes (char *buf, int buf_len);
 
 int strsubstitute (char *str, char c_from, char c_to);
 
-/* FIXME: `timeval_sub_timespec' needs a description */
-int timeval_sub_timespec (struct timeval *tv0, struct timeval *tv1, struct timespec *ret);
+/*
+ * NAME
+ *   timeval_cmp
+ *
+ * DESCRIPTION
+ *   Compare the two time values `tv0' and `tv1' and store the absolut value
+ *   of the difference in the time value pointed to by `delta' if it does not
+ *   equal NULL.
+ *
+ * RETURN VALUE
+ *   Returns an integer less than, equal to, or greater than zero if `tv0' is
+ *   less than, equal to, or greater than `tv1' respectively.
+ */
+int timeval_cmp (struct timeval tv0, struct timeval tv1, struct timeval *delta);
+
+/* make sure tv_usec stores less than a second */
+#define NORMALIZE_TIMEVAL(tv) \
+	do { \
+		(tv).tv_sec += (tv).tv_usec / 1000000; \
+		(tv).tv_usec = (tv).tv_usec % 1000000; \
+	} while (0)
 
 int check_create_dir (const char *file_orig);
 
@@ -201,8 +229,12 @@ int notification_init (notification_t *n, int severity, const char *message,
 			(vl)->host, (vl)->plugin, (vl)->plugin_instance, \
 			(ds)->type, (vl)->type_instance)
 
-typedef int (*dirwalk_callback_f)(const char *filename);
-int walk_directory (const char *dir, dirwalk_callback_f callback);
+typedef int (*dirwalk_callback_f)(const char *dirname, const char *filename,
+		void *user_data);
+int walk_directory (const char *dir, dirwalk_callback_f callback,
+		void *user_data);
 int read_file_contents (const char *filename, char *buf, int bufsize);
 
+counter_t counter_diff (counter_t old_value, counter_t new_value);
+
 #endif /* COMMON_H */