Add utility to convert SCTS to local/remote time

diff --git a/src/smsutil.c b/src/smsutil.c
index 6bbb57d..d44e73d 100644 (file)
--- a/src/smsutil.c
+++ b/src/smsutil.c
@@ -1484,3 +1484,40 @@ gboolean sms_udh_iter_next(struct sms_udh_iter *iter)
 
        return TRUE;
 }
+
+/* Returns both forms of time.  The time_t value returns the time in local
+ * timezone.  The struct tm is filled out with the remote time information
+ */
+time_t sms_scts_to_time(struct sms_scts *scts, struct tm *remote)
+{
+       struct tm t;
+       time_t ret;
+
+       t.tm_sec = scts->second;
+       t.tm_min = scts->minute;
+       t.tm_hour = scts->hour;
+       t.tm_mday = scts->day;
+       t.tm_mon = scts->month - 1;
+       t.tm_isdst = -1;
+
+       if (scts->year > 80)
+               t.tm_year = scts->year;
+       else
+               t.tm_year = scts->year + 100;
+
+       ret = mktime(&t);
+
+       /* Adjust local time by the local timezone information */
+       ret += t.tm_gmtoff;
+
+       /* Set the proper timezone on the remote side */
+       t.tm_gmtoff = scts->timezone * 15 * 60;
+
+       /* Now adjust by the remote timezone information */
+       ret -= t.tm_gmtoff;
+
+       if (remote)
+               memcpy(remote, &t, sizeof(struct tm));
+
+       return ret;
+}

diff --git a/src/smsutil.h b/src/smsutil.h
index 940a185..566701c 100644 (file)
--- a/src/smsutil.h
+++ b/src/smsutil.h
@@ -295,4 +295,6 @@ guint8 sms_udh_iter_get_ie_length(struct sms_udh_iter *iter);
 void sms_udh_iter_get_ie_data(struct sms_udh_iter *iter, guint8 *data);
 gboolean sms_udh_iter_has_next(struct sms_udh_iter *iter);
 gboolean sms_udh_iter_next(struct sms_udh_iter *iter);
+
+time_t sms_scts_to_time(struct sms_scts *scts, struct tm *remote);
 #endif

diff --git a/unit/test-sms.c b/unit/test-sms.c
index d644cda..6057076 100644 (file)
--- a/unit/test-sms.c
+++ b/unit/test-sms.c
@@ -38,6 +38,10 @@ static const char *simple_submit = "0011000B916407281553F80000AA"
 
 static void print_scts(struct sms_scts *scts, const char *prefix)
 {
+       time_t ts;
+       struct tm remote;
+       char buf[128];
+
        g_print("%s: (YY-MM-DD) %02d-%02d-%02d\n", prefix,
                (int)scts->year, (int)scts->month, (int)scts->day);
 
@@ -47,6 +51,18 @@ static void print_scts(struct sms_scts *scts, const char *prefix)
        g_print("%s: Timezone %d hours %d minutes\n", prefix,
                (int)scts->timezone / 4,
                (int)((abs(scts->timezone) % 4) * 15));
+
+       ts = sms_scts_to_time(scts, &remote);
+
+       strftime(buf, 127, "%a, %d %b %Y %H:%M:%S %z", localtime(&ts));
+       buf[127] = '\0';
+
+       g_print("local time: %s\n", buf);
+
+       strftime(buf, 127, "%a, %d %b %Y %H:%M:%S %z", &remote);
+       buf[127] = '\0';
+
+       g_print("remote time: %s\n", buf);
 }
 
 static void print_vpf(enum sms_validity_period_format vpf,