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calendarspec: allow repetition values with ranges

Browse Source 
"Every other hour from 9 until 5" can be written as
`9..17/2:00` instead of `9,11,13,15,17:00`
This commit is contained in:
Douglas Christman 2016-12-15 20:02:10 -05:00
parent ebc8968bc0
commit a2eb5ea79c
4 changed files with 120 additions and 89 deletions
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9
man/systemd.time.xml
View File

@ -217,11 +217,12 @@
<para>In the date and time specifications, any component may be
specified as <literal>*</literal> in which case any value will
match. Alternatively, each component can be specified as a list of
values separated by commas. Values may also be suffixed with
values separated by commas. Values may be suffixed with
<literal>/</literal> and a repetition value, which indicates that
the value itself and the value plus all multiples of the repetition value
are matched. Each component may also contain a range of values
separated by <literal>..</literal>.</para>
are matched. Two values separated by <literal>..</literal> may be used
to indicate a range of values; ranges may also be followed with
<literal>/</literal> and a repetition value.</para>
<para>A date specification may use <literal>~</literal> to indicate the
last day(s) in a month. For example, <literal>*-02~03</literal> means
@ -281,7 +282,7 @@ Wed..Sat,Tue 12-10-15 1:2:3 → Tue..Sat 2012-10-15 01:02:03
Sat,Sun 12-05 08:05:40 → Sat,Sun *-12-05 08:05:40
Sat,Sun 08:05:40 → Sat,Sun *-*-* 08:05:40
2003-03-05 05:40 → 2003-03-05 05:40:00
05:40:23.4200004/3.1700005 → 05:40:23.420000/3.170001
05:40:23.4200004/3.1700005 → *-*-* 05:40:23.420000/3.170001
2003-02..04-05 → 2003-02..04-05 00:00:00
2003-03-05 05:40 UTC → 2003-03-05 05:40:00 UTC
2003-03-05 → 2003-03-05 00:00:00

162
src/basic/calendarspec.c
View File

@ -33,11 +33,9 @@
#include "parse-util.h"
#include "string-util.h"
/* Longest valid date/time range is 1970..2199 */
#define MAX_RANGE_LEN 230
#define BITS_WEEKDAYS 127
#define MIN_YEAR 1970
#define MAX_YEAR 2199
#define BITS_WEEKDAYS 127
static void free_chain(CalendarComponent *c) {
CalendarComponent *n;
@ -72,6 +70,11 @@ static int component_compare(const void *_a, const void *_b) {
if ((*a)->value > (*b)->value)
return 1;
if ((*a)->range_end < (*b)->range_end)
return -1;
if ((*a)->range_end > (*b)->range_end)
return 1;
if ((*a)->repeat < (*b)->repeat)
return -1;
if ((*a)->repeat > (*b)->repeat)
@ -80,15 +83,24 @@ static int component_compare(const void *_a, const void *_b) {
return 0;
}
static void sort_chain(CalendarComponent **c) {
static void normalize_chain(CalendarComponent **c) {
unsigned n = 0, k;
CalendarComponent **b, *i, **j, *next;
assert(c);
for (i = *c; i; i = i->next)
for (i = *c; i; i = i->next) {
n++;
/*
* While we're counting the chain, also normalize `range_end`
* so the length of the range is a multiple of `repeat`
*/
if (i->range_end > i->value)
i->range_end -= (i->range_end - i->value) % i->repeat;
}
if (n <= 1)
return;
@ -125,9 +137,15 @@ static void fix_year(CalendarComponent *c) {
if (c->value >= 0 && c->value < 70)
c->value += 2000;
if (c->range_end >= 0 && c->range_end < 70)
c->range_end += 2000;
if (c->value >= 70 && c->value < 100)
c->value += 1900;
if (c->range_end >= 70 && c->range_end < 100)
c->range_end += 1900;
c = n;
}
}
@ -143,12 +161,12 @@ int calendar_spec_normalize(CalendarSpec *c) {
fix_year(c->year);
sort_chain(&c->year);
sort_chain(&c->month);
sort_chain(&c->day);
sort_chain(&c->hour);
sort_chain(&c->minute);
sort_chain(&c->microsecond);
normalize_chain(&c->year);
normalize_chain(&c->month);
normalize_chain(&c->day);
normalize_chain(&c->hour);
normalize_chain(&c->minute);
normalize_chain(&c->microsecond);
return 0;
}
@ -157,20 +175,32 @@ _pure_ static bool chain_valid(CalendarComponent *c, int from, int to, bool end_
if (!c)
return true;
/* Forbid dates more than 28 days from the end of the month */
if (end_of_month)
to -= 3;
if (c->value < from || c->value > to)
return false;
/*
* c->repeat must be short enough so at least one repetition may
* occur before the end of the interval. For dates scheduled
* relative to the end of the month, c->value corresponds to the
* Nth last day of the month.
* relative to the end of the month, c->value and c->range_end
* correspond to the Nth last day of the month.
*/
if (c->range_end >= 0) {
if (c->range_end < from || c ->range_end > to)
return false;
if (c->value + c->repeat > c->range_end)
return false;
} else {
if (end_of_month && c->value - c->repeat < from)
return false;
if (!end_of_month && c->value + c->repeat > to)
return false;
}
if (c->next)
return chain_valid(c->next, from, to, end_of_month);
@ -255,7 +285,6 @@ static void format_weekdays(FILE *f, const CalendarSpec *c) {
}
static void format_chain(FILE *f, int space, const CalendarComponent *c, bool usec) {
const CalendarComponent *n, *p;
int d = usec ? (int) USEC_PER_SEC : 1;
assert(f);
@ -268,31 +297,20 @@ static void format_chain(FILE *f, int space, const CalendarComponent *c, bool us
assert(c->value >= 0);
fprintf(f, "%0*i", space, c->value / d);
if (c->value % d != 0)
if (c->value % d > 0)
fprintf(f, ".%06i", c->value % d);
if (c->repeat != 0)
if (c->range_end > 0)
fprintf(f, "..%0*i", space, c->range_end / d);
if (c->range_end % d > 0)
fprintf(f, ".%06i", c->range_end % d);
if (c->repeat > 0 && !(c->range_end > 0 && c->repeat == d))
fprintf(f, "/%i", c->repeat / d);
if (c->repeat % d != 0)
if (c->repeat % d > 0)
fprintf(f, ".%06i", c->repeat % d);
p = c;
for (;;) {
n = p->next;
if (!n || n->repeat || p->repeat)
break;
if (n->value - p->value != d)
break;
p = n;
}
if (p->value - c->value >= 2 * d) {
fputs("..", f);
format_chain(f, space, p, usec);
} else if (c->next) {
if (c->next) {
fputc(',', f);
format_chain(f, space, c->next, usec);
}
@ -531,6 +549,7 @@ static int const_chain(int value, CalendarComponent **c) {
return -ENOMEM;
cc->value = value;
cc->range_end = -1;
cc->repeat = 0;
cc->next = *c;
@ -540,7 +559,7 @@ static int const_chain(int value, CalendarComponent **c) {
}
static int prepend_component(const char **p, bool usec, CalendarComponent **c) {
unsigned long i, value, range_end, range_inc, repeat = 0;
unsigned long value, range_end = -1, repeat = 0;
CalendarComponent *cc;
int r;
const char *e;
@ -554,6 +573,15 @@ static int prepend_component(const char **p, bool usec, CalendarComponent **c) {
if (r < 0)
return r;
if (e[0] == '.' && e[1] == '.') {
e += 2;
r = parse_component_decimal(&e, usec, &range_end);
if (r < 0)
return r;
repeat = usec ? USEC_PER_SEC : 1;
}
if (*e == '/') {
e++;
r = parse_component_decimal(&e, usec, &repeat);
@ -562,30 +590,6 @@ static int prepend_component(const char **p, bool usec, CalendarComponent **c) {
if (repeat == 0)
return -ERANGE;
} else if (e[0] == '.' && e[1] == '.') {
e += 2;
r = parse_component_decimal(&e, usec, &range_end);
if (r < 0)
return r;
if (value >= range_end)
return -EINVAL;
range_inc = usec ? USEC_PER_SEC : 1;
/* Don't allow impossibly large ranges... */
if (range_end - value >= MAX_RANGE_LEN * range_inc)
return -EINVAL;
/* ...or ranges with only a single element */
if (range_end - value < range_inc)
return -EINVAL;
for (i = value; i <= range_end; i += range_inc) {
r = const_chain(i, c);
if (r < 0)
return r;
}
}
if (*e != 0 && *e != ' ' && *e != ',' && *e != '-' && *e != '~' && *e != ':')
@ -596,6 +600,7 @@ static int prepend_component(const char **p, bool usec, CalendarComponent **c) {
return -ENOMEM;
cc->value = value;
cc->range_end = range_end;
cc->repeat = repeat;
cc->next = *c;
@ -1014,11 +1019,24 @@ fail:
return r;
}
static int find_end_of_month(struct tm *tm, bool utc, int day)
{
struct tm t = *tm;
t.tm_mon++;
t.tm_mday = 1 - day;
if (mktime_or_timegm(&t, utc) == (time_t) -1 ||
t.tm_mon != tm->tm_mon)
return -1;
return t.tm_mday;
}
static int find_matching_component(const CalendarSpec *spec, const CalendarComponent *c,
struct tm *tm, int *val) {
const CalendarComponent *n, *p = c;
struct tm t;
int v, d = -1;
int v, e, d = -1;
bool d_set = false;
int r;
@ -1030,18 +1048,16 @@ static int find_matching_component(const CalendarSpec *spec, const CalendarCompo
while (c) {
n = c->next;
if (spec->end_of_month && p == spec->day) {
t = *tm;
t.tm_mon++;
t.tm_mday = 1 - c->value;
if (mktime_or_timegm(&t, spec->utc) == (time_t) -1 ||
t.tm_mon != tm->tm_mon)
v = -1;
else
v = t.tm_mday;
} else
v = c->value;
e = c->range_end;
if (spec->end_of_month && p == spec->day) {
v = find_end_of_month(tm, spec->utc, v);
e = find_end_of_month(tm, spec->utc, e);
if (e > 0)
SWAP_TWO(v, e);
}
if (v >= *val) {
@ -1055,7 +1071,7 @@ static int find_matching_component(const CalendarSpec *spec, const CalendarCompo
k = v + c->repeat * ((*val - v + c->repeat - 1) / c->repeat);
if (!d_set || k < d) {
if ((!d_set || k < d) && (e < 0 || k <= e)) {
d = k;
d_set = true;
}

1
src/basic/calendarspec.h
View File

@ -29,6 +29,7 @@
typedef struct CalendarComponent {
int value;
int range_end;
int repeat;
struct CalendarComponent *next;

23
src/test/test-calendarspec.c
View File

@ -149,8 +149,8 @@ int main(int argc, char* argv[]) {
test_one("*-*-7 0:0:0", "*-*-07 00:00:00");
test_one("10-15", "*-10-15 00:00:00");
test_one("monday *-12-* 17:00", "Mon *-12-* 17:00:00");
test_one("Mon,Fri *-*-3,1,2 *:30:45", "Mon,Fri *-*-01..03 *:30:45");
test_one("12,14,13,12:20,10,30", "*-*-* 12..14:10,20,30:00");
test_one("Mon,Fri *-*-3,1,2 *:30:45", "Mon,Fri *-*-01,02,03 *:30:45");
test_one("12,14,13,12:20,10,30", "*-*-* 12,13,14:10,20,30:00");
test_one("mon,fri *-1/2-1,3 *:30:45", "Mon,Fri *-01/2-01,03 *:30:45");
test_one("03-05 08:05:40", "*-03-05 08:05:40");
test_one("08:05:40", "*-*-* 08:05:40");
@ -172,13 +172,12 @@ int main(int argc, char* argv[]) {
test_one("2015-10-25 01:00:00 uTc", "2015-10-25 01:00:00 UTC");
test_one("2016-03-27 03:17:00.4200005", "2016-03-27 03:17:00.420001");
test_one("2016-03-27 03:17:00/0.42", "2016-03-27 03:17:00/0.420000");
test_one("2016-03-27 03:17:00/0.42", "2016-03-27 03:17:00/0.420000");
test_one("9..11,13:00,30", "*-*-* 09..11,13:00,30:00");
test_one("1..3-1..3 1..3:1..3", "*-01..03-01..03 01..03:01..03:00");
test_one("00:00:1.125..2.125", "*-*-* 00:00:01.125000,02.125000");
test_one("00:00:1.125..2.125", "*-*-* 00:00:01.125000..02.125000");
test_one("00:00:1.0..3.8", "*-*-* 00:00:01..03");
test_one("00:00:01..03", "*-*-* 00:00:01..03");
test_one("00:00:01/2,02..03", "*-*-* 00:00:01/2,02,03");
test_one("00:00:01/2,02..03", "*-*-* 00:00:01/2,02..03");
test_one("*-*~1 Utc", "*-*~01 00:00:00 UTC");
test_one("*-*~05,3 ", "*-*~03,05 00:00:00");
test_one("*-*~* 00:00:00", "*-*-* 00:00:00");
@ -189,6 +188,10 @@ int main(int argc, char* argv[]) {
test_one("*:*", "*-*-* *:*:00");
test_one("12:*", "*-*-* 12:*:00");
test_one("*:30", "*-*-* *:30:00");
test_one("93..00-*-*", "1993..2000-*-* 00:00:00");
test_one("00..07-*-*", "2000..2007-*-* 00:00:00");
test_one("*:20..39/5", "*-*-* *:20..35/5:00");
test_one("00:00:20..40/1", "*-*-* 00:00:20..40");
test_next("2016-03-27 03:17:00", "", 12345, 1459048620000000);
test_next("2016-03-27 03:17:00", "CET", 12345, 1459041420000000);
@ -207,6 +210,9 @@ int main(int argc, char* argv[]) {
test_next("2016-02~01 UTC", "", 12345, 1456704000000000);
test_next("Mon 2017-05~01..07 UTC", "", 12345, 1496016000000000);
test_next("Mon 2017-05~07/1 UTC", "", 12345, 1496016000000000);
test_next("2017-08-06 9,11,13,15,17:00 UTC", "", 1502029800000000, 1502031600000000);
test_next("2017-08-06 9..17/2:00 UTC", "", 1502029800000000, 1502031600000000);
test_next("2016-12-* 3..21/6:00 UTC", "", 1482613200000001, 1482634800000000);
assert_se(calendar_spec_from_string("test", &c) < 0);
assert_se(calendar_spec_from_string(" utc", &c) < 0);
@ -225,6 +231,13 @@ int main(int argc, char* argv[]) {
assert_se(calendar_spec_from_string("-00:+00/-5", &c) < 0);
assert_se(calendar_spec_from_string("00:+00/-5", &c) < 0);
assert_se(calendar_spec_from_string("2016- 11- 24 12: 30: 00", &c) < 0);
assert_se(calendar_spec_from_string("*~29", &c) < 0);
assert_se(calendar_spec_from_string("*~16..31", &c) < 0);
assert_se(calendar_spec_from_string("12..1/2-*", &c) < 0);
assert_se(calendar_spec_from_string("*:05..05", &c) < 0);
assert_se(calendar_spec_from_string("*:05..10/6", &c) < 0);
assert_se(calendar_spec_from_string("20/4:00", &c) < 0);
assert_se(calendar_spec_from_string("00:00/60", &c) < 0);
test_timestamp();
test_hourly_bug_4031();