store_json: Base the memstore emitter on the store-writer API.

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

diff --git a/src/core/time.c b/src/core/time.c
index 3baf2240cb30b5197d02e601275617d6f67c6bd2..d8e8fabf6442e3d83ac02364521c9a1abd54e98e 100644 (file)
--- a/src/core/time.c
+++ b/src/core/time.c
@@ -25,16 +25,33 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#if HAVE_CONFIG_H
+#      include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include "sysdb.h"
 #include "core/time.h"
 
 #include <time.h>
 
+#include <stdbool.h>
+#include <stdio.h>
 #include <string.h>
 
 /*
  * public API
  */
 
+/* 1 second (in nano-seconds) */
+#define SEC 1000000000L
+
+const sdb_time_t SDB_INTERVAL_YEAR   = 3652425L   * 24L * 60L * 60L * 100000L;
+const sdb_time_t SDB_INTERVAL_MONTH  =  30436875L * 24L * 60L * 60L * 1000L;
+const sdb_time_t SDB_INTERVAL_DAY    =              24L * 60L * 60L * SEC;
+const sdb_time_t SDB_INTERVAL_HOUR   =                    60L * 60L * SEC;
+const sdb_time_t SDB_INTERVAL_MINUTE =                          60L * SEC;
+const sdb_time_t SDB_INTERVAL_SECOND =                                SEC;
+
 sdb_time_t
 sdb_gettime(void)
 {
@@ -61,19 +78,113 @@ sdb_sleep(sdb_time_t reg, sdb_time_t *rem)
 } /* sdb_sleep */
 
 size_t
-sdb_strftime(char *s, size_t len, const char *format, sdb_time_t t)
+sdb_strftime(char *s, size_t len, sdb_time_t t)
 {
+       char tmp[len];
        time_t tstamp;
        struct tm tm;
+       long tz;
 
        memset(&tm, 0, sizeof(tm));
-
        tstamp = (time_t)SDB_TIME_TO_SECS(t);
        if (! localtime_r (&tstamp, &tm))
                return 0;
 
-       return strftime(s, len, format, &tm);
+       if (! strftime(tmp, len, "%F %T", &tm))
+               return 0;
+       tmp[sizeof(tmp) - 1] = '\0';
+
+       tz = -timezone / 36;
+       if (tm.tm_isdst > 0)
+               tz += 100;
+
+       t %= SDB_INTERVAL_SECOND;
+       if (! t)
+               return snprintf(s, len, "%s %+05ld", tmp, tz);
+       return snprintf(s, len, "%s.%09ld %+05ld", tmp, t, tz);
 } /* sdb_strftime */
 
+size_t
+sdb_strfinterval(char *s, size_t len, sdb_time_t interval)
+{
+       size_t n = 0;
+       size_t i;
+
+       /* special case the optional fractional part for seconds */
+       bool have_seconds = 0;
+
+       struct {
+               sdb_time_t  interval;
+               const char *suffix;
+       } specs[] = {
+               { SDB_INTERVAL_YEAR,   "Y" },
+               { SDB_INTERVAL_MONTH,  "M" },
+               { SDB_INTERVAL_DAY,    "D" },
+               { SDB_INTERVAL_HOUR,   "h" },
+               { SDB_INTERVAL_MINUTE, "m" },
+               { SDB_INTERVAL_SECOND, "" },
+       };
+
+#define LEN (len > n ? len - n : 0)
+       for (i = 0; i < SDB_STATIC_ARRAY_LEN(specs); ++i) {
+               if (interval >= specs[i].interval) {
+                       n += snprintf(s + n, LEN, "%"PRIsdbTIME"%s",
+                                       interval / specs[i].interval, specs[i].suffix);
+                       interval %= specs[i].interval;
+                       if (specs[i].interval == SDB_INTERVAL_SECOND)
+                               have_seconds = 1;
+               }
+       }
+
+       if (interval) {
+               n += snprintf(s + n, LEN, ".%09"PRIsdbTIME, interval);
+               have_seconds = 1;
+
+               /* removing trailing zeroes */
+               if (n <= len)
+                       while (s[n - 1] == '0')
+                               s[n--] = '\0';
+       }
+
+       if (! n) {
+               n = snprintf(s, len, "0");
+               have_seconds = 1;
+       }
+
+       if (have_seconds)
+               n += snprintf(s + n, LEN, "s");
+#undef LEN
+
+       if (len)
+               s[len - 1] = '\0';
+       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 : */