static int parse_component_decimal(const char **p, bool usec, unsigned long *res) {
unsigned long value;
const char *e = NULL;
char *ee = NULL;
int r;
if (!isdigit(**p))
return -EINVAL;
errno = 0;
value = strtoul(*p, &ee, 10);
if (errno > 0)
return -errno;
if (ee == *p)
return -EINVAL;
if ((unsigned long) (int) value != value)
return -ERANGE;
e = ee;
if (usec) {
if (value * USEC_PER_SEC / USEC_PER_SEC != value)
return -ERANGE;
value *= USEC_PER_SEC;
if (*e == '.') {
unsigned add;
/* This is the start of a range, not a fractional part */
if (e[1] == '.')
goto finish;
e++;
r = parse_fractional_part_u(&e, 6, &add);
if (r < 0)
return r;
if (add + value < value)
return -ERANGE;
value += add;
}
}
finish:
*p = e;
*res = value;
return 0;
}
static int parse_component_decimal(const char **p, bool usec, int *res) {
unsigned long value;
const char *e = NULL;
char *ee = NULL;
int r;
if (!isdigit(**p))
return -EINVAL;
errno = 0;
value = strtoul(*p, &ee, 10);
if (errno > 0)
return -errno;
if (ee == *p)
return -EINVAL;
e = ee;
if (usec) {
if (value * USEC_PER_SEC / USEC_PER_SEC != value)
return -ERANGE;
value *= USEC_PER_SEC;
/* One "." is a decimal point, but ".." is a range separator */
if (e[0] == '.' && e[1] != '.') {
unsigned add;
e++;
r = parse_fractional_part_u(&e, 6, &add);
if (r < 0)
return r;
if (add + value < value)
return -ERANGE;
value += add;
}
}
if (value > INT_MAX)
return -ERANGE;
*p = e;
*res = value;
return 0;
}
int parse_timestamp(const char *t, usec_t *usec) {
static const struct {
const char *name;
const int nr;
} day_nr[] = {
{ "Sunday", 0 },
{ "Sun", 0 },
{ "Monday", 1 },
{ "Mon", 1 },
{ "Tuesday", 2 },
{ "Tue", 2 },
{ "Wednesday", 3 },
{ "Wed", 3 },
{ "Thursday", 4 },
{ "Thu", 4 },
{ "Friday", 5 },
{ "Fri", 5 },
{ "Saturday", 6 },
{ "Sat", 6 },
};
const char *k;
const char *utc;
struct tm tm, copy;
time_t x;
usec_t x_usec, plus = 0, minus = 0, ret;
int r, weekday = -1;
unsigned i;
/*
* Allowed syntaxes:
*
* 2012-09-22 16:34:22
* 2012-09-22 16:34 (seconds will be set to 0)
* 2012-09-22 (time will be set to 00:00:00)
* 16:34:22 (date will be set to today)
* 16:34 (date will be set to today, seconds to 0)
* now
* yesterday (time is set to 00:00:00)
* today (time is set to 00:00:00)
* tomorrow (time is set to 00:00:00)
* +5min
* -5days
* @2147483647 (seconds since epoch)
*
*/
assert(t);
assert(usec);
if (t[0] == '@')
return parse_sec(t + 1, usec);
ret = now(CLOCK_REALTIME);
if (streq(t, "now"))
goto finish;
else if (t[0] == '+') {
r = parse_sec(t+1, &plus);
if (r < 0)
return r;
goto finish;
} else if (t[0] == '-') {
r = parse_sec(t+1, &minus);
if (r < 0)
return r;
goto finish;
} else if ((k = endswith(t, " ago"))) {
t = strndupa(t, k - t);
r = parse_sec(t, &minus);
if (r < 0)
return r;
goto finish;
} else if ((k = endswith(t, " left"))) {
t = strndupa(t, k - t);
r = parse_sec(t, &plus);
if (r < 0)
return r;
goto finish;
}
utc = endswith_no_case(t, " UTC");
if (utc)
t = strndupa(t, utc - t);
x = ret / USEC_PER_SEC;
x_usec = 0;
assert_se(localtime_or_gmtime_r(&x, &tm, utc));
tm.tm_isdst = -1;
if (streq(t, "today")) {
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
} else if (streq(t, "yesterday")) {
tm.tm_mday --;
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
} else if (streq(t, "tomorrow")) {
tm.tm_mday ++;
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
}
for (i = 0; i < ELEMENTSOF(day_nr); i++) {
size_t skip;
if (!startswith_no_case(t, day_nr[i].name))
continue;
skip = strlen(day_nr[i].name);
if (t[skip] != ' ')
continue;
weekday = day_nr[i].nr;
t += skip + 1;
break;
}
copy = tm;
k = strptime(t, "%y-%m-%d %H:%M:%S", &tm);
if (k) {
if (*k == '.')
goto parse_usec;
else if (*k == 0)
goto from_tm;
}
tm = copy;
k = strptime(t, "%Y-%m-%d %H:%M:%S", &tm);
if (k) {
if (*k == '.')
goto parse_usec;
else if (*k == 0)
goto from_tm;
}
tm = copy;
k = strptime(t, "%y-%m-%d %H:%M", &tm);
if (k && *k == 0) {
tm.tm_sec = 0;
goto from_tm;
}
tm = copy;
k = strptime(t, "%Y-%m-%d %H:%M", &tm);
if (k && *k == 0) {
tm.tm_sec = 0;
goto from_tm;
}
tm = copy;
k = strptime(t, "%y-%m-%d", &tm);
if (k && *k == 0) {
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
}
tm = copy;
k = strptime(t, "%Y-%m-%d", &tm);
if (k && *k == 0) {
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
}
tm = copy;
k = strptime(t, "%H:%M:%S", &tm);
if (k) {
if (*k == '.')
goto parse_usec;
else if (*k == 0)
goto from_tm;
}
tm = copy;
k = strptime(t, "%H:%M", &tm);
if (k && *k == 0) {
tm.tm_sec = 0;
goto from_tm;
}
return -EINVAL;
parse_usec:
{
unsigned add;
k++;
r = parse_fractional_part_u(&k, 6, &add);
if (r < 0)
return -EINVAL;
if (*k)
return -EINVAL;
x_usec = add;
}
from_tm:
x = mktime_or_timegm(&tm, utc);
if (x == (time_t) -1)
return -EINVAL;
if (weekday >= 0 && tm.tm_wday != weekday)
return -EINVAL;
ret = (usec_t) x * USEC_PER_SEC + x_usec;
finish:
ret += plus;
if (ret > minus)
ret -= minus;
else
ret = 0;
*usec = ret;
return 0;
}
int parse_timestamp(const char *t, usec_t *usec) {
static const struct {
const char *name;
const int nr;
} day_nr[] = {
{ "Sunday", 0 },
{ "Sun", 0 },
{ "Monday", 1 },
{ "Mon", 1 },
{ "Tuesday", 2 },
{ "Tue", 2 },
{ "Wednesday", 3 },
{ "Wed", 3 },
{ "Thursday", 4 },
{ "Thu", 4 },
{ "Friday", 5 },
{ "Fri", 5 },
{ "Saturday", 6 },
{ "Sat", 6 },
};
const char *k, *utc, *tzn = NULL;
struct tm tm, copy;
time_t x;
usec_t x_usec, plus = 0, minus = 0, ret;
int r, weekday = -1, dst = -1;
unsigned i;
/*
* Allowed syntaxes:
*
* 2012-09-22 16:34:22
* 2012-09-22 16:34 (seconds will be set to 0)
* 2012-09-22 (time will be set to 00:00:00)
* 16:34:22 (date will be set to today)
* 16:34 (date will be set to today, seconds to 0)
* now
* yesterday (time is set to 00:00:00)
* today (time is set to 00:00:00)
* tomorrow (time is set to 00:00:00)
* +5min
* -5days
* @2147483647 (seconds since epoch)
*
*/
assert(t);
assert(usec);
if (t[0] == '@')
return parse_sec(t + 1, usec);
ret = now(CLOCK_REALTIME);
if (streq(t, "now"))
goto finish;
else if (t[0] == '+') {
r = parse_sec(t+1, &plus);
if (r < 0)
return r;
goto finish;
} else if (t[0] == '-') {
r = parse_sec(t+1, &minus);
if (r < 0)
return r;
goto finish;
} else if ((k = endswith(t, " ago"))) {
t = strndupa(t, k - t);
r = parse_sec(t, &minus);
if (r < 0)
return r;
goto finish;
} else if ((k = endswith(t, " left"))) {
t = strndupa(t, k - t);
r = parse_sec(t, &plus);
if (r < 0)
return r;
goto finish;
}
/* See if the timestamp is suffixed with UTC */
utc = endswith_no_case(t, " UTC");
if (utc)
t = strndupa(t, utc - t);
else {
const char *e = NULL;
int j;
tzset();
/* See if the timestamp is suffixed by either the DST or non-DST local timezone. Note that we only
* support the local timezones here, nothing else. Not because we wouldn't want to, but simply because
* there are no nice APIs available to cover this. By accepting the local time zone strings, we make
* sure that all timestamps written by format_timestamp() can be parsed correctly, even though we don't
* support arbitrary timezone specifications. */
for (j = 0; j <= 1; j++) {
if (isempty(tzname[j]))
continue;
e = endswith_no_case(t, tzname[j]);
if (!e)
continue;
if (e == t)
continue;
if (e[-1] != ' ')
continue;
break;
}
if (IN_SET(j, 0, 1)) {
/* Found one of the two timezones specified. */
t = strndupa(t, e - t - 1);
dst = j;
tzn = tzname[j];
}
}
x = (time_t) (ret / USEC_PER_SEC);
x_usec = 0;
if (!localtime_or_gmtime_r(&x, &tm, utc))
return -EINVAL;
tm.tm_isdst = dst;
if (tzn)
tm.tm_zone = tzn;
if (streq(t, "today")) {
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
} else if (streq(t, "yesterday")) {
tm.tm_mday--;
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
} else if (streq(t, "tomorrow")) {
tm.tm_mday++;
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
}
for (i = 0; i < ELEMENTSOF(day_nr); i++) {
size_t skip;
if (!startswith_no_case(t, day_nr[i].name))
continue;
skip = strlen(day_nr[i].name);
if (t[skip] != ' ')
continue;
weekday = day_nr[i].nr;
t += skip + 1;
break;
}
copy = tm;
k = strptime(t, "%y-%m-%d %H:%M:%S", &tm);
if (k) {
if (*k == '.')
goto parse_usec;
else if (*k == 0)
goto from_tm;
}
tm = copy;
k = strptime(t, "%Y-%m-%d %H:%M:%S", &tm);
if (k) {
if (*k == '.')
goto parse_usec;
else if (*k == 0)
goto from_tm;
}
tm = copy;
k = strptime(t, "%y-%m-%d %H:%M", &tm);
if (k && *k == 0) {
tm.tm_sec = 0;
goto from_tm;
}
tm = copy;
k = strptime(t, "%Y-%m-%d %H:%M", &tm);
if (k && *k == 0) {
tm.tm_sec = 0;
goto from_tm;
}
tm = copy;
k = strptime(t, "%y-%m-%d", &tm);
if (k && *k == 0) {
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
}
tm = copy;
k = strptime(t, "%Y-%m-%d", &tm);
if (k && *k == 0) {
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
goto from_tm;
}
tm = copy;
k = strptime(t, "%H:%M:%S", &tm);
if (k) {
if (*k == '.')
goto parse_usec;
else if (*k == 0)
goto from_tm;
}
tm = copy;
k = strptime(t, "%H:%M", &tm);
if (k && *k == 0) {
tm.tm_sec = 0;
goto from_tm;
}
return -EINVAL;
parse_usec:
{
unsigned add;
k++;
r = parse_fractional_part_u(&k, 6, &add);
if (r < 0)
return -EINVAL;
if (*k)
return -EINVAL;
x_usec = add;
}
from_tm:
x = mktime_or_timegm(&tm, utc);
if (x == (time_t) -1)
return -EINVAL;
if (weekday >= 0 && tm.tm_wday != weekday)
return -EINVAL;
ret = (usec_t) x * USEC_PER_SEC + x_usec;
finish:
ret += plus;
if (ret > minus)
ret -= minus;
else
ret = 0;
*usec = ret;
return 0;
}
