--- /dev/null
+/***
+ First set of functions in this file are part of systemd, and were
+ copied to util-linux at August 2013.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+#ifndef UTIL_LINUX_TIME_UTIL_H
+#define UTIL_LINUX_TIME_UTIL_H
+
+#include <stdio.h>
+#include <inttypes.h>
+
+typedef uint64_t usec_t;
+typedef uint64_t nsec_t;
+
+#define MSEC_PER_SEC 1000ULL
+#define USEC_PER_SEC 1000000ULL
+#define USEC_PER_MSEC 1000ULL
+#define NSEC_PER_SEC 1000000000ULL
+#define NSEC_PER_MSEC 1000000ULL
+#define NSEC_PER_USEC 1000ULL
+
+#define USEC_PER_MINUTE (60ULL*USEC_PER_SEC)
+#define NSEC_PER_MINUTE (60ULL*NSEC_PER_SEC)
+#define USEC_PER_HOUR (60ULL*USEC_PER_MINUTE)
+#define NSEC_PER_HOUR (60ULL*NSEC_PER_MINUTE)
+#define USEC_PER_DAY (24ULL*USEC_PER_HOUR)
+#define NSEC_PER_DAY (24ULL*NSEC_PER_HOUR)
+#define USEC_PER_WEEK (7ULL*USEC_PER_DAY)
+#define NSEC_PER_WEEK (7ULL*NSEC_PER_DAY)
+#define USEC_PER_MONTH (2629800ULL*USEC_PER_SEC)
+#define NSEC_PER_MONTH (2629800ULL*NSEC_PER_SEC)
+#define USEC_PER_YEAR (31557600ULL*USEC_PER_SEC)
+#define NSEC_PER_YEAR (31557600ULL*NSEC_PER_SEC)
+
+#define FORMAT_TIMESTAMP_MAX ((4*4+1)+11+9+4+1) /* weekdays can be unicode */
+#define FORMAT_TIMESTAMP_RELATIVE_MAX 256
+#define FORMAT_TIMESPAN_MAX 64
+
+int parse_timestamp(const char *t, usec_t *usec);
+
+#endif /* UTIL_LINUX_TIME_UTIL_H */
--- /dev/null
+/***
+ First set of functions in this file are part of systemd, and were
+ copied to util-linux at August 2013.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with util-linux; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <assert.h>
+#include <ctype.h>
+#include <string.h>
+#include <time.h>
+
+#include "c.h"
+#include "time-util.h"
+
+#define WHITESPACE " \t\n\r"
+
+#define streq(a,b) (strcmp((a),(b)) == 0)
+
+static char *startswith(const char *s, const char *prefix)
+{
+ const char *a, *b;
+
+ assert(s);
+ assert(prefix);
+
+ a = s, b = prefix;
+ for (;;) {
+ if (*b == 0)
+ return (char *)a;
+ if (*a != *b)
+ return NULL;
+
+ a++, b++;
+ }
+}
+
+static char *startswith_no_case(const char *s, const char *prefix)
+{
+ const char *a, *b;
+
+ assert(s);
+ assert(prefix);
+
+ a = s, b = prefix;
+ for (;;) {
+ if (*b == 0)
+ return (char *)a;
+ if (tolower(*a) != tolower(*b))
+ return NULL;
+
+ a++, b++;
+ }
+}
+
+static char *endswith(const char *s, const char *postfix)
+{
+ size_t sl, pl;
+
+ assert(s);
+ assert(postfix);
+
+ sl = strlen(s);
+ pl = strlen(postfix);
+
+ if (pl == 0)
+ return (char *)s + sl;
+
+ if (sl < pl)
+ return NULL;
+
+ if (memcmp(s + sl - pl, postfix, pl) != 0)
+ return NULL;
+
+ return (char *)s + sl - pl;
+}
+
+static int parse_sec(const char *t, usec_t *usec)
+{
+ static const struct {
+ const char *suffix;
+ usec_t usec;
+ } table[] = {
+ { "seconds", USEC_PER_SEC },
+ { "second", USEC_PER_SEC },
+ { "sec", USEC_PER_SEC },
+ { "s", USEC_PER_SEC },
+ { "minutes", USEC_PER_MINUTE },
+ { "minute", USEC_PER_MINUTE },
+ { "min", USEC_PER_MINUTE },
+ { "months", USEC_PER_MONTH },
+ { "month", USEC_PER_MONTH },
+ { "msec", USEC_PER_MSEC },
+ { "ms", USEC_PER_MSEC },
+ { "m", USEC_PER_MINUTE },
+ { "hours", USEC_PER_HOUR },
+ { "hour", USEC_PER_HOUR },
+ { "hr", USEC_PER_HOUR },
+ { "h", USEC_PER_HOUR },
+ { "days", USEC_PER_DAY },
+ { "day", USEC_PER_DAY },
+ { "d", USEC_PER_DAY },
+ { "weeks", USEC_PER_WEEK },
+ { "week", USEC_PER_WEEK },
+ { "w", USEC_PER_WEEK },
+ { "years", USEC_PER_YEAR },
+ { "year", USEC_PER_YEAR },
+ { "y", USEC_PER_YEAR },
+ { "usec", 1ULL },
+ { "us", 1ULL },
+ { "", USEC_PER_SEC }, /* default is sec */
+ };
+
+ const char *p;
+ usec_t r = 0;
+ int something = FALSE;
+
+ assert(t);
+ assert(usec);
+
+ p = t;
+ for (;;) {
+ long long l, z = 0;
+ char *e;
+ unsigned i, n = 0;
+
+ p += strspn(p, WHITESPACE);
+
+ if (*p == 0) {
+ if (!something)
+ return -EINVAL;
+
+ break;
+ }
+
+ errno = 0;
+ l = strtoll(p, &e, 10);
+
+ if (errno > 0)
+ return -errno;
+
+ if (l < 0)
+ return -ERANGE;
+
+ if (*e == '.') {
+ char *b = e + 1;
+
+ errno = 0;
+ z = strtoll(b, &e, 10);
+ if (errno > 0)
+ return -errno;
+
+ if (z < 0)
+ return -ERANGE;
+
+ if (e == b)
+ return -EINVAL;
+
+ n = e - b;
+
+ } else if (e == p)
+ return -EINVAL;
+
+ e += strspn(e, WHITESPACE);
+
+ for (i = 0; i < ARRAY_SIZE(table); i++)
+ if (startswith(e, table[i].suffix)) {
+ usec_t k = (usec_t) z * table[i].usec;
+
+ for (; n > 0; n--)
+ k /= 10;
+
+ r += (usec_t) l *table[i].usec + k;
+ p = e + strlen(table[i].suffix);
+
+ something = TRUE;
+ break;
+ }
+
+ if (i >= ARRAY_SIZE(table))
+ return -EINVAL;
+
+ }
+
+ *usec = r;
+
+ 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;
+ struct tm tm, copy;
+ time_t x;
+ usec_t 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
+ *
+ */
+
+ assert(t);
+ assert(usec);
+
+ x = time(NULL);
+ localtime_r(&x, &tm);
+ tm.tm_isdst = -1;
+
+ if (streq(t, "now"))
+ goto finish;
+
+ else if (streq(t, "today")) {
+ tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
+ goto finish;
+
+ } else if (streq(t, "yesterday")) {
+ tm.tm_mday--;
+ tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
+ goto finish;
+
+ } else if (streq(t, "tomorrow")) {
+ tm.tm_mday++;
+ tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
+ 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 (endswith(t, " ago")) {
+ char *z;
+
+ z = strndup(t, strlen(t) - 4);
+ if (!z)
+ return -ENOMEM;
+
+ r = parse_sec(z, &minus);
+ if (r < 0)
+ return r;
+
+ goto finish;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(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 && *k == 0)
+ goto finish;
+
+ tm = copy;
+ k = strptime(t, "%Y-%m-%d %H:%M:%S", &tm);
+ if (k && *k == 0)
+ goto finish;
+
+ tm = copy;
+ k = strptime(t, "%y-%m-%d %H:%M", &tm);
+ if (k && *k == 0) {
+ tm.tm_sec = 0;
+ goto finish;
+ }
+
+ tm = copy;
+ k = strptime(t, "%Y-%m-%d %H:%M", &tm);
+ if (k && *k == 0) {
+ tm.tm_sec = 0;
+ goto finish;
+ }
+
+ tm = copy;
+ k = strptime(t, "%y-%m-%d", &tm);
+ if (k && *k == 0) {
+ tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
+ goto finish;
+ }
+
+ tm = copy;
+ k = strptime(t, "%Y-%m-%d", &tm);
+ if (k && *k == 0) {
+ tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
+ goto finish;
+ }
+
+ tm = copy;
+ k = strptime(t, "%H:%M:%S", &tm);
+ if (k && *k == 0)
+ goto finish;
+
+ tm = copy;
+ k = strptime(t, "%H:%M", &tm);
+ if (k && *k == 0) {
+ tm.tm_sec = 0;
+ goto finish;
+ }
+
+ return -EINVAL;
+
+ finish:
+ x = mktime(&tm);
+ if (x == (time_t)-1)
+ return -EINVAL;
+
+ if (weekday >= 0 && tm.tm_wday != weekday)
+ return -EINVAL;
+
+ ret = (usec_t) x *USEC_PER_SEC;
+
+ ret += plus;
+ if (ret > minus)
+ ret -= minus;
+ else
+ ret = 0;
+
+ *usec = ret;
+
+ return 0;
+}
projects / thirdparty / util-linux.git / commitdiff
