Various additions and fixes.

1 files changed, 77 insertions, 0 deletions

diff --git a/src/lib9/date.c b/src/lib9/date.c
new file mode 100644
index 00000000..2e84fd0a
--- /dev/null
+++ b/src/lib9/date.c
@@ -0,0 +1,77 @@
+#include <u.h>
+#include <libc.h>
+
+#undef gmtime
+#undef localtime
+#undef asctime
+#undef ctime
+#undef cputime
+#undef times
+#undef tm2sec
+#undef nsec
+
+#include <time.h>
+
+static Tm bigtm;
+
+static void
+tm2Tm(struct tm *tm, Tm *bigtm)
+{
+	memset(bigtm, 0, sizeof *bigtm);
+	bigtm->sec = tm->tm_sec;
+	bigtm->min = tm->tm_min;
+	bigtm->hour = tm->tm_hour;
+	bigtm->mday = tm->tm_mday;
+	bigtm->mon = tm->tm_mon;
+	bigtm->year = tm->tm_year;
+	bigtm->wday = tm->tm_wday;
+	strecpy(bigtm->zone, bigtm->zone+4, tm->tm_zone);
+	bigtm->tzoff = tm->tm_gmtoff;
+}
+
+static void
+Tm2tm(Tm *bigtm, struct tm *tm)
+{
+	memset(tm, 0, sizeof *tm);
+	tm->tm_sec = bigtm->sec;
+	tm->tm_min = bigtm->min;
+	tm->tm_hour = bigtm->hour;
+	tm->tm_mday = bigtm->mday;
+	tm->tm_mon = bigtm->mon;
+	tm->tm_year = bigtm->year;
+	tm->tm_wday = bigtm->wday;
+	tm->tm_zone = bigtm->zone;
+	tm->tm_gmtoff = bigtm->tzoff;
+}
+
+Tm*
+p9gmtime(long t)
+{
+	struct tm tm;
+
+	tm = *gmtime(&t);
+	tm2Tm(&tm, &bigtm);
+	return &bigtm;
+}
+
+Tm*
+p9localtime(long t)
+{
+	struct tm tm;
+
+	tm = *localtime(&t);
+	tm2Tm(&tm, &bigtm);
+	return &bigtm;
+}
+
+long
+p9tm2sec(Tm *bigtm)
+{
+	struct tm tm;
+
+	Tm2tm(bigtm, &tm);
+	if(strcmp(bigtm->zone, "GMT") == 0 || strcmp(bigtm->zone, "UCT") == 0)
+		return timegm(&tm);
+	return mktime(&tm);	/* local time zone */
+}
+