time: Added sdb_strpunit() to parse a time unit.

[sysdb.git] / src / core / time.c

diff --git a/src/core/time.c b/src/core/time.c
index 762ffd0034fc3315c77e3951c0a41f5566fa2a3b..5d34e18b4fed99a8769ed9f17d226e6d9432db5d 100644 (file)
--- a/src/core/time.c
+++ b/src/core/time.c
@@ -41,7 +41,7 @@
  * public API
  */
 
-/* 1 second (in micro-seconds) */
+/* 1 second (in nano-seconds) */
 #define SEC 1000000000L
 
 const sdb_time_t SDB_INTERVAL_YEAR   = 3652425L   * 24L * 60L * 60L * 100000L;
@@ -147,5 +147,31 @@ sdb_strfinterval(char *s, size_t len, sdb_time_t interval)
        return n;
 } /* sdb_strfinterval */
 
+sdb_time_t
+sdb_strpunit(const char *s)
+{
+       struct {
+               const char *s;
+               sdb_time_t unit;
+       } units[] = {
+               { "Y", SDB_INTERVAL_YEAR },
+               { "M", SDB_INTERVAL_MONTH },
+               { "D", SDB_INTERVAL_DAY },
+               { "h", SDB_INTERVAL_HOUR },
+               { "m", SDB_INTERVAL_MINUTE },
+               { "s", SDB_INTERVAL_SECOND },
+               { "ms", SDB_INTERVAL_SECOND / 1000L },
+               { "us", SDB_INTERVAL_SECOND / 1000000L },
+               { "ns", 1 },
+       };
+
+       size_t i;
+
+       for (i = 0; i < SDB_STATIC_ARRAY_LEN(units); ++i)
+               if (! strcmp(s, units[i].s))
+                       return units[i].unit;
+       return 0;
+} /* sdb_strpunit */
+
 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */