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authorP. J. McDermott <pj@pehjota.net>2022-03-19 21:14:39 (EDT)
committer P. J. McDermott <pj@pehjota.net>2022-03-19 21:14:39 (EDT)
commitcf9c057d273399f29eb0b86afa50294ad5d14d6d (patch)
tree1628fcea81ea10afddb68abeed208de34db1c520 /src/datetime.c
parentea2528f95f32099d76322b3327e350aeea7c249b (diff)
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datetime: Add function to get seconds since Epoch
And use it in main().
Diffstat (limited to 'src/datetime.c')
-rw-r--r--src/datetime.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/src/datetime.c b/src/datetime.c
index cbdf6b4..994d3fe 100644
--- a/src/datetime.c
+++ b/src/datetime.c
@@ -102,6 +102,18 @@ static const char *DATETIME_MISC_FMTS_[] = {
" %a %b %d %H:%M:%S %Y ",
};
+static struct tm DATETIME_EPOCH_ = {
+ .tm_sec = 0,
+ .tm_min = 0,
+ .tm_hour = 0,
+ .tm_mday = 1,
+ .tm_mon = 0,
+ .tm_year = 70,
+ .tm_wday = 4,
+ .tm_yday = 0,
+ .tm_isdst = -1,
+};
+
static void
_datetime_reset_tm(struct tm *tm)
{
@@ -378,3 +390,13 @@ datetime_strftime_misc(const struct tm *tm, char **out, size_t *buf_sz,
return _datetime_strftime(DATETIME_MISC_FMTS_, tm, out, buf_sz, buf, i);
}
+
+double
+datetime_diff_epoch(time_t t)
+{
+ time_t epoch;
+
+ epoch = timegm(&DATETIME_EPOCH_);
+
+ return difftime(t, epoch);
+}