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-rw-r--r--erts/emulator/beam/bif.c55
-rw-r--r--erts/emulator/beam/bif.tab6
-rw-r--r--erts/emulator/beam/erl_time_sup.c146
-rw-r--r--erts/emulator/beam/sys.h9
4 files changed, 196 insertions, 20 deletions
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index 26f1b4facb..55f4798892 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -3385,6 +3385,61 @@ BIF_RETTYPE universaltime_to_localtime_1(BIF_ALIST_1)
BIF_RET(TUPLE2(hp, res1, res2));
}
+/* convert calendar:universaltime_to_seconds/1 */
+
+BIF_RETTYPE universaltime_to_posixtime_1(BIF_ALIST_1)
+{
+ Sint year, month, day;
+ Sint hour, minute, second;
+
+ Sint64 seconds = 0;
+ Eterm *hp;
+ Uint hsz = 0;
+
+ if (!time_to_parts(BIF_ARG_1, &year, &month, &day,
+ &hour, &minute, &second))
+ BIF_ERROR(BIF_P, BADARG);
+
+ if (!univ_to_seconds(year, month, day, hour, minute, second, &seconds)) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+
+ erts_bld_sint64(NULL, &hsz, seconds);
+ hp = HAlloc(BIF_P, hsz);
+ BIF_RET(erts_bld_sint64(&hp, NULL, seconds));
+}
+
+/* convert calendar:seconds_to_universaltime/1 */
+
+BIF_RETTYPE posixtime_to_universaltime_1(BIF_ALIST_1)
+{
+ Sint year, month, day;
+ Sint hour, minute, second;
+ Eterm res1, res2;
+ Eterm* hp;
+
+ Sint64 time = 0;
+
+ if (!term_to_Sint64(BIF_ARG_1, &time)) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+
+ if (!seconds_to_univ(time, &year, &month, &day,
+ &hour, &minute, &second)) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+
+ hp = HAlloc(BIF_P, 4+4+3);
+ res1 = TUPLE3(hp,make_small(year),make_small(month),
+ make_small(day));
+ hp += 4;
+ res2 = TUPLE3(hp,make_small(hour),make_small(minute),
+ make_small(second));
+ hp += 4;
+ BIF_RET(TUPLE2(hp, res1, res2));
+}
+
+
/**********************************************************************/
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index 987008c937..8cc568b16c 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -806,6 +806,12 @@ bif file:native_name_encoding/0
#
bif erlang:check_old_code/1
+
+#
+# New in R15B
+#
+bif erlang:universaltime_to_posixtime/1
+bif erlang:posixtime_to_universaltime/1
#
# Obsolete
#
diff --git a/erts/emulator/beam/erl_time_sup.c b/erts/emulator/beam/erl_time_sup.c
index b319288f7d..f782e2f0b1 100644
--- a/erts/emulator/beam/erl_time_sup.c
+++ b/erts/emulator/beam/erl_time_sup.c
@@ -494,7 +494,7 @@ get_time(int *hour, int *minute, int *second)
the_clock = time((time_t *)0);
#ifdef HAVE_LOCALTIME_R
- localtime_r(&the_clock, (tm = &tmbuf));
+ tm = localtime_r(&the_clock, &tmbuf);
#else
tm = localtime(&the_clock);
#endif
@@ -516,7 +516,7 @@ get_date(int *year, int *month, int *day)
the_clock = time((time_t *)0);
#ifdef HAVE_LOCALTIME_R
- localtime_r(&the_clock, (tm = &tmbuf));
+ tm = localtime_r(&the_clock, &tmbuf);
#else
tm = localtime(&the_clock);
#endif
@@ -586,7 +586,44 @@ static const int mdays[14] = {0, 31, 28, 31, 30, 31, 30,
(((y) % 100) != 0)) || \
(((y) % 400) == 0))
-#define BASEYEAR 1970
+/* This is the earliest year we are sure to be able to handle
+ on all platforms w/o problems */
+#define BASEYEAR 1902
+
+/* A more "clever" mktime
+ * return 1, if successful
+ * return -1, if not successful
+ */
+
+static int erl_mktime(time_t *c, struct tm *tm) {
+ time_t clock;
+
+ clock = mktime(tm);
+
+ if (clock != -1) {
+ *c = clock;
+ return 1;
+ }
+
+ /* in rare occasions mktime returns -1
+ * when a correct value has been entered
+ *
+ * decrease seconds with one second
+ * if the result is -2, epochs should be -1
+ */
+
+ tm->tm_sec = tm->tm_sec - 1;
+ clock = mktime(tm);
+ tm->tm_sec = tm->tm_sec + 1;
+
+ *c = -1;
+
+ if (clock == -2) {
+ return 1;
+ }
+
+ return -1;
+}
/*
* gregday
@@ -597,8 +634,8 @@ static const int mdays[14] = {0, 31, 28, 31, 30, 31, 30,
*/
static time_t gregday(int year, int month, int day)
{
- time_t ndays = 0;
- time_t gyear, pyear, m;
+ Sint ndays = 0;
+ Sint gyear, pyear, m;
/* number of days in previous years */
gyear = year - 1600;
@@ -613,10 +650,72 @@ static time_t gregday(int year, int month, int day)
if (is_leap_year(year) && (month > 2))
ndays++;
ndays += day - 1;
- return ndays - 135140; /* 135140 = Jan 1, 1970 */
+ return (time_t) (ndays - 135140); /* 135140 = Jan 1, 1970 */
+}
+
+#define SECONDS_PER_MINUTE (60)
+#define SECONDS_PER_HOUR (60 * SECONDS_PER_MINUTE)
+#define SECONDS_PER_DAY (24 * SECONDS_PER_HOUR)
+
+int seconds_to_univ(Sint64 time, Sint *year, Sint *month, Sint *day,
+ Sint *hour, Sint *minute, Sint *second) {
+
+ Sint y,mi;
+ Sint days = time / SECONDS_PER_DAY;
+ Sint secs = time % SECONDS_PER_DAY;
+ Sint tmp;
+
+ if (secs < 0) {
+ days--;
+ secs += SECONDS_PER_DAY;
+ }
+
+ tmp = secs % SECONDS_PER_HOUR;
+
+ *hour = secs / SECONDS_PER_HOUR;
+ *minute = tmp / SECONDS_PER_MINUTE;
+ *second = tmp % SECONDS_PER_MINUTE;
+
+ days += 719468;
+ y = (10000*((Sint64)days) + 14780) / 3652425;
+ tmp = days - (365 * y + y/4 - y/100 + y/400);
+
+ if (tmp < 0) {
+ y--;
+ tmp = days - (365*y + y/4 - y/100 + y/400);
+ }
+ mi = (100 * tmp + 52)/3060;
+ *month = (mi + 2) % 12 + 1;
+ *year = y + (mi + 2) / 12;
+ *day = tmp - (mi * 306 + 5)/10 + 1;
+
+ return 1;
}
+int univ_to_seconds(Sint year, Sint month, Sint day, Sint hour, Sint minute, Sint second, Sint64 *time) {
+ Sint days;
+
+ if (!(IN_RANGE(1600, year, INT_MAX - 1) &&
+ IN_RANGE(1, month, 12) &&
+ IN_RANGE(1, day, (mdays[month] +
+ (month == 2
+ && (year % 4 == 0)
+ && (year % 100 != 0 || year % 400 == 0)))) &&
+ IN_RANGE(0, hour, 23) &&
+ IN_RANGE(0, minute, 59) &&
+ IN_RANGE(0, second, 59))) {
+ return 0;
+ }
+
+ days = gregday(year, month, day);
+ *time = SECONDS_PER_DAY;
+ *time *= days; /* don't try overflow it, it hurts */
+ *time += SECONDS_PER_HOUR * hour;
+ *time += SECONDS_PER_MINUTE * minute;
+ *time += second;
+ return 1;
+}
int
local_to_univ(Sint *year, Sint *month, Sint *day,
@@ -647,15 +746,18 @@ local_to_univ(Sint *year, Sint *month, Sint *day,
t.tm_min = *minute;
t.tm_sec = *second;
t.tm_isdst = isdst;
- the_clock = mktime(&t);
- if (the_clock == -1) {
+
+ /* the nature of mktime makes this a bit interesting,
+ * up to four mktime calls could happen here
+ */
+
+ if (erl_mktime(&the_clock, &t) < 0) {
if (isdst) {
/* If this is a timezone without DST and the OS (correctly)
refuses to give us a DST time, we simulate the Linux/Solaris
behaviour of giving the same data as if is_dst was not set. */
t.tm_isdst = 0;
- the_clock = mktime(&t);
- if (the_clock == -1) {
+ if (erl_mktime(&the_clock, &t)) {
/* Failed anyway, something else is bad - will be a badarg */
return 0;
}
@@ -665,10 +767,13 @@ local_to_univ(Sint *year, Sint *month, Sint *day,
}
}
#ifdef HAVE_GMTIME_R
- gmtime_r(&the_clock, (tm = &tmbuf));
+ tm = gmtime_r(&the_clock, &tmbuf);
#else
tm = gmtime(&the_clock);
#endif
+ if (!tm) {
+ return 0;
+ }
*year = tm->tm_year + 1900;
*month = tm->tm_mon +1;
*day = tm->tm_mday;
@@ -722,17 +827,20 @@ univ_to_local(Sint *year, Sint *month, Sint *day,
#endif
#ifdef HAVE_LOCALTIME_R
- localtime_r(&the_clock, (tm = &tmbuf));
+ tm = localtime_r(&the_clock, &tmbuf);
#else
tm = localtime(&the_clock);
#endif
- *year = tm->tm_year + 1900;
- *month = tm->tm_mon +1;
- *day = tm->tm_mday;
- *hour = tm->tm_hour;
- *minute = tm->tm_min;
- *second = tm->tm_sec;
- return 1;
+ if (tm) {
+ *year = tm->tm_year + 1900;
+ *month = tm->tm_mon +1;
+ *day = tm->tm_mday;
+ *hour = tm->tm_hour;
+ *minute = tm->tm_min;
+ *second = tm->tm_sec;
+ return 1;
+ }
+ return 0;
}
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index efc6dd2c6b..6b4b382caa 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -667,7 +667,14 @@ void get_localtime(int *year, int *month, int *day,
int *hour, int *minute, int *second);
void get_universaltime(int *year, int *month, int *day,
int *hour, int *minute, int *second);
-int univ_to_local(Sint *year, Sint *month, Sint *day,
+int seconds_to_univ(Sint64 seconds,
+ Sint *year, Sint *month, Sint *day,
+ Sint *hour, Sint *minute, Sint *second);
+int univ_to_seconds(Sint year, Sint month, Sint day,
+ Sint hour, Sint minute, Sint second,
+ Sint64* seconds);
+int univ_to_local(
+ Sint *year, Sint *month, Sint *day,
Sint *hour, Sint *minute, Sint *second);
int local_to_univ(Sint *year, Sint *month, Sint *day,
Sint *hour, Sint *minute, Sint *second, int isdst);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-10 18:14:50 +0000