lib/common/iso8601.c

/* */
This source file includes following definitions.
crm_get_utc_time
crm_time_new
crm_time_new_undefined
crm_time_is_defined
crm_time_free
year_days
crm_time_january1_weekday
crm_time_weeks_in_year
crm_time_days_in_month
crm_time_leapyear
get_ordinal_days
crm_time_log_alias
crm_time_get_sec
crm_time_get_timeofday
crm_time_get_timezone
crm_time_get_seconds
crm_time_get_seconds_since_epoch
crm_time_get_gregorian
crm_time_get_ordinal
crm_time_get_isoweek
crm_duration_as_string
crm_time_as_string
crm_time_parse_sec
crm_time_parse_offset
crm_time_parse
parse_date
parse_int
crm_time_parse_duration
crm_time_parse_period
crm_time_free_period
crm_time_set
ha_set_tm_time
crm_time_set_timet
pcmk_copy_time
crm_time_add
crm_time_calculate_duration
crm_time_subtract
crm_time_check
crm_time_compare
crm_time_add_seconds
crm_time_add_days
crm_time_add_months
crm_time_add_minutes
crm_time_add_hours
crm_time_add_weeks
crm_time_add_years
ha_get_tm_time
pcmk__time_hr_convert
pcmk__time_set_hr_dt
pcmk__time_timeval_hr_convert
pcmk__time_hr_new
pcmk__time_hr_free
pcmk__time_format_hr
pcmk__epoch2str
   1 /*
   2  * Copyright 2005-2020 the Pacemaker project contributors
   3  *
   4  * The version control history for this file may have further details.
   5  *
   6  * This source code is licensed under the GNU Lesser General Public License
   7  * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
   8  */
   9 
  10 /*
  11  * References:
  12  *      https://en.wikipedia.org/wiki/ISO_8601
  13  *      http://www.staff.science.uu.nl/~gent0113/calendar/isocalendar.htm
  14  */
  15 
  16 #include <crm_internal.h>
  17 #include <crm/crm.h>
  18 #include <time.h>
  19 #include <ctype.h>
  20 #include <string.h>
  21 #include <stdbool.h>
  22 #include <crm/common/iso8601.h>
  23 #include <crm/common/iso8601_internal.h>
  24 
  25 /*
  26  * Andrew's code was originally written for OSes whose "struct tm" contains:
  27  *      long tm_gmtoff;         :: Seconds east of UTC
  28  *      const char *tm_zone;    :: Timezone abbreviation
  29  * Some OSes lack these, instead having:
  30  *      time_t (or long) timezone;
  31                 :: "difference between UTC and local standard time"
  32  *      char *tzname[2] = { "...", "..." };
  33  * I (David Lee) confess to not understanding the details.  So my attempted
  34  * generalisations for where their use is necessary may be flawed.
  35  *
  36  * 1. Does "difference between ..." subtract the same or opposite way?
  37  * 2. Should it use "altzone" instead of "timezone"?
  38  * 3. Should it use tzname[0] or tzname[1]?  Interaction with timezone/altzone?
  39  */
  40 #if defined(HAVE_STRUCT_TM_TM_GMTOFF)
  41 #  define GMTOFF(tm) ((tm)->tm_gmtoff)
  42 #else
  43 /* Note: extern variable; macro argument not actually used.  */
  44 #  define GMTOFF(tm) (-timezone+daylight)
  45 #endif
  46 
  47 #define HOUR_SECONDS    (60 * 60)
  48 #define DAY_SECONDS     (HOUR_SECONDS * 24)
  49 
  50 // A date/time or duration
  51 struct crm_time_s {
  52     int years;      // Calendar year (date/time) or number of years (duration)
  53     int months;     // Number of months (duration only)
  54     int days;       // Ordinal day of year (date/time) or number of days (duration)
  55     int seconds;    // Seconds of day (date/time) or number of seconds (duration)
  56     int offset;     // Seconds offset from UTC (date/time only)
  57     bool duration;  // True if duration
  58 };
  59 
  60 static crm_time_t *parse_date(const char *date_str);
  61 
  62 static crm_time_t *
  63 crm_get_utc_time(crm_time_t *dt)
     /*  */
  64 {
  65     crm_time_t *utc = NULL;
  66 
  67     if (dt == NULL) {
  68         errno = EINVAL;
  69         return NULL;
  70     }
  71 
  72     utc = crm_time_new_undefined();
  73     utc->years = dt->years;
  74     utc->days = dt->days;
  75     utc->seconds = dt->seconds;
  76     utc->offset = 0;
  77 
  78     if (dt->offset) {
  79         crm_time_add_seconds(utc, -dt->offset);
  80     } else {
  81         /* Durations (which are the only things that can include months, never have a timezone */
  82         utc->months = dt->months;
  83     }
  84 
  85     crm_time_log(LOG_TRACE, "utc-source", dt,
  86                  crm_time_log_date | crm_time_log_timeofday | crm_time_log_with_timezone);
  87     crm_time_log(LOG_TRACE, "utc-target", utc,
  88                  crm_time_log_date | crm_time_log_timeofday | crm_time_log_with_timezone);
  89     return utc;
  90 }
  91 
  92 crm_time_t *
  93 crm_time_new(const char *date_time)
     /*  */
  94 {
  95     time_t tm_now;
  96     crm_time_t *dt = NULL;
  97 
  98     tzset();
  99     if (date_time == NULL) {
 100         tm_now = time(NULL);
 101         dt = crm_time_new_undefined();
 102         crm_time_set_timet(dt, &tm_now);
 103     } else {
 104         dt = parse_date(date_time);
 105     }
 106     return dt;
 107 }
 108 
 109 /*!
 110  * \brief Allocate memory for an uninitialized time object
 111  *
 112  * \return Newly allocated time object
 113  * \note The caller is responsible for freeing the return value using
 114  *       crm_time_free().
 115  */
 116 crm_time_t *
 117 crm_time_new_undefined()
     /*  */
 118 {
 119     crm_time_t *result = calloc(1, sizeof(crm_time_t));
 120 
 121     CRM_ASSERT(result != NULL);
 122     return result;
 123 }
 124 
 125 /*!
 126  * \brief Check whether a time object has been initialized yet
 127  *
 128  * \param[in] t  Time object to check
 129  *
 130  * \return TRUE if time object has been initialized, FALSE otherwise
 131  */
 132 bool
 133 crm_time_is_defined(const crm_time_t *t)
     /*  */
 134 {
 135     // Any nonzero member indicates something has been done to t
 136     return (t != NULL) && (t->years || t->months || t->days || t->seconds
 137                            || t->offset || t->duration);
 138 }
 139 
 140 void
 141 crm_time_free(crm_time_t * dt)
     /*  */
 142 {
 143     if (dt == NULL) {
 144         return;
 145     }
 146     free(dt);
 147 }
 148 
 149 static int
 150 year_days(int year)
     /*  */
 151 {
 152     int d = 365;
 153 
 154     if (crm_time_leapyear(year)) {
 155         d++;
 156     }
 157     return d;
 158 }
 159 
 160 /* From http://myweb.ecu.edu/mccartyr/ISOwdALG.txt :
 161  *
 162  * 5. Find the Jan1Weekday for Y (Monday=1, Sunday=7)
 163  *  YY = (Y-1) % 100
 164  *  C = (Y-1) - YY
 165  *  G = YY + YY/4
 166  *  Jan1Weekday = 1 + (((((C / 100) % 4) x 5) + G) % 7)
 167  */
 168 int
 169 crm_time_january1_weekday(int year)
     /*  */
 170 {
 171     int YY = (year - 1) % 100;
 172     int C = (year - 1) - YY;
 173     int G = YY + YY / 4;
 174     int jan1 = 1 + (((((C / 100) % 4) * 5) + G) % 7);
 175 
 176     crm_trace("YY=%d, C=%d, G=%d", YY, C, G);
 177     crm_trace("January 1 %.4d: %d", year, jan1);
 178     return jan1;
 179 }
 180 
 181 int
 182 crm_time_weeks_in_year(int year)
     /*  */
 183 {
 184     int weeks = 52;
 185     int jan1 = crm_time_january1_weekday(year);
 186 
 187     /* if jan1 == thursday */
 188     if (jan1 == 4) {
 189         weeks++;
 190     } else {
 191         jan1 = crm_time_january1_weekday(year + 1);
 192         /* if dec31 == thursday aka. jan1 of next year is a friday */
 193         if (jan1 == 5) {
 194             weeks++;
 195         }
 196 
 197     }
 198     return weeks;
 199 }
 200 
 201 // Jan-Dec plus Feb of leap years
 202 static int month_days[13] = {
 203     31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 29
 204 };
 205 
 206 /*!
 207  * \brief Return number of days in given month of given year
 208  *
 209  * \param[in]  Ordinal month (1-12)
 210  * \param[in]  Gregorian year
 211  *
 212  * \return Number of days in given month (0 if given month is invalid)
 213  */
 214 int
 215 crm_time_days_in_month(int month, int year)
     /*  */
 216 {
 217     if ((month < 1) || (month > 12)) {
 218         return 0;
 219     }
 220     if ((month == 2) && crm_time_leapyear(year)) {
 221         month = 13;
 222     }
 223     return month_days[month - 1];
 224 }
 225 
 226 bool
 227 crm_time_leapyear(int year)
     /*  */
 228 {
 229     gboolean is_leap = FALSE;
 230 
 231     if (year % 4 == 0) {
 232         is_leap = TRUE;
 233     }
 234     if (year % 100 == 0 && year % 400 != 0) {
 235         is_leap = FALSE;
 236     }
 237     return is_leap;
 238 }
 239 
 240 static uint32_t
 241 get_ordinal_days(uint32_t y, uint32_t m, uint32_t d)
     /*  */
 242 {
 243     int lpc;
 244 
 245     for (lpc = 1; lpc < m; lpc++) {
 246         d += crm_time_days_in_month(lpc, y);
 247     }
 248     return d;
 249 }
 250 
 251 void
 252 crm_time_log_alias(int log_level, const char *file, const char *function, int line,
     /*  */
 253                    const char *prefix, crm_time_t * date_time, int flags)
 254 {
 255     char *date_s = crm_time_as_string(date_time, flags);
 256 
 257     if (log_level == LOG_STDOUT) {
 258         printf("%s%s%s\n",
 259                (prefix? prefix : ""), (prefix? ": " : ""), date_s);
 260     } else {
 261         do_crm_log_alias(log_level, file, function, line, "%s%s%s",
 262                          (prefix? prefix : ""), (prefix? ": " : ""), date_s);
 263     }
 264     free(date_s);
 265 }
 266 
 267 static void
 268 crm_time_get_sec(int sec, uint * h, uint * m, uint * s)
     /*  */
 269 {
 270     uint hours, minutes, seconds;
 271 
 272     if (sec < 0) {
 273         seconds = 0 - sec;
 274     } else {
 275         seconds = sec;
 276     }
 277 
 278     hours = seconds / HOUR_SECONDS;
 279     seconds -= HOUR_SECONDS * hours;
 280 
 281     minutes = seconds / 60;
 282     seconds -= 60 * minutes;
 283 
 284     crm_trace("%d == %.2d:%.2d:%.2d", sec, hours, minutes, seconds);
 285 
 286     *h = hours;
 287     *m = minutes;
 288     *s = seconds;
 289 }
 290 
 291 int
 292 crm_time_get_timeofday(crm_time_t * dt, uint * h, uint * m, uint * s)
     /*  */
 293 {
 294     crm_time_get_sec(dt->seconds, h, m, s);
 295     return TRUE;
 296 }
 297 
 298 int
 299 crm_time_get_timezone(crm_time_t * dt, uint * h, uint * m)
     /*  */
 300 {
 301     uint s;
 302 
 303     crm_time_get_sec(dt->seconds, h, m, &s);
 304     return TRUE;
 305 }
 306 
 307 long long
 308 crm_time_get_seconds(crm_time_t * dt)
     /*  */
 309 {
 310     int lpc;
 311     crm_time_t *utc = NULL;
 312     long long in_seconds = 0;
 313 
 314     if (dt == NULL) {
 315         return 0;
 316     }
 317 
 318     utc = crm_get_utc_time(dt);
 319     if (utc == NULL) {
 320         return 0;
 321     }
 322 
 323     for (lpc = 1; lpc < utc->years; lpc++) {
 324         int dmax = year_days(lpc);
 325 
 326         in_seconds += DAY_SECONDS * dmax;
 327     }
 328 
 329     /* utc->months is an offset that can only be set for a duration.
 330      * By definition, the value is variable depending on the date to
 331      * which it is applied.
 332      *
 333      * Force 30-day months so that something vaguely sane happens
 334      * for anyone that tries to use a month in this way.
 335      */
 336     if (utc->months > 0) {
 337         in_seconds += DAY_SECONDS * 30 * utc->months;
 338     }
 339 
 340     if (utc->days > 0) {
 341         in_seconds += DAY_SECONDS * (utc->days - 1);
 342     }
 343     in_seconds += utc->seconds;
 344 
 345     crm_time_free(utc);
 346     return in_seconds;
 347 }
 348 
 349 #define EPOCH_SECONDS 62135596800ULL    /* Calculated using crm_time_get_seconds() */
 350 long long
 351 crm_time_get_seconds_since_epoch(crm_time_t * dt)
     /*  */
 352 {
 353     return (dt == NULL)? 0 : (crm_time_get_seconds(dt) - EPOCH_SECONDS);
 354 }
 355 
 356 int
 357 crm_time_get_gregorian(crm_time_t * dt, uint * y, uint * m, uint * d)
     /*  */
 358 {
 359     int months = 0;
 360     int days = dt->days;
 361 
 362     if(dt->years != 0) {
 363         for (months = 1; months <= 12 && days > 0; months++) {
 364             int mdays = crm_time_days_in_month(months, dt->years);
 365 
 366             if (mdays >= days) {
 367                 break;
 368             } else {
 369                 days -= mdays;
 370             }
 371         }
 372 
 373     } else if (dt->months) {
 374         /* This is a duration including months, don't convert the days field */
 375         months = dt->months;
 376 
 377     } else {
 378         /* This is a duration not including months, still don't convert the days field */
 379     }
 380 
 381     *y = dt->years;
 382     *m = months;
 383     *d = days;
 384     crm_trace("%.4d-%.3d -> %.4d-%.2d-%.2d", dt->years, dt->days, dt->years, months, days);
 385     return TRUE;
 386 }
 387 
 388 int
 389 crm_time_get_ordinal(crm_time_t * dt, uint * y, uint * d)
     /*  */
 390 {
 391     *y = dt->years;
 392     *d = dt->days;
 393     return TRUE;
 394 }
 395 
 396 int
 397 crm_time_get_isoweek(crm_time_t * dt, uint * y, uint * w, uint * d)
     /*  */
 398 {
 399     /*
 400      * Monday 29 December 2008 is written "2009-W01-1"
 401      * Sunday 3 January 2010 is written "2009-W53-7"
 402      */
 403     int year_num = 0;
 404     int jan1 = crm_time_january1_weekday(dt->years);
 405     int h = -1;
 406 
 407     CRM_CHECK(dt->days > 0, return FALSE);
 408 
 409 /* 6. Find the Weekday for Y M D */
 410     h = dt->days + jan1 - 1;
 411     *d = 1 + ((h - 1) % 7);
 412 
 413 /* 7. Find if Y M D falls in YearNumber Y-1, WeekNumber 52 or 53 */
 414     if (dt->days <= (8 - jan1) && jan1 > 4) {
 415         crm_trace("year--, jan1=%d", jan1);
 416         year_num = dt->years - 1;
 417         *w = crm_time_weeks_in_year(year_num);
 418 
 419     } else {
 420         year_num = dt->years;
 421     }
 422 
 423 /* 8. Find if Y M D falls in YearNumber Y+1, WeekNumber 1 */
 424     if (year_num == dt->years) {
 425         int dmax = year_days(year_num);
 426         int correction = 4 - *d;
 427 
 428         if ((dmax - dt->days) < correction) {
 429             crm_trace("year++, jan1=%d, i=%d vs. %d", jan1, dmax - dt->days, correction);
 430             year_num = dt->years + 1;
 431             *w = 1;
 432         }
 433     }
 434 
 435 /* 9. Find if Y M D falls in YearNumber Y, WeekNumber 1 through 53 */
 436     if (year_num == dt->years) {
 437         int j = dt->days + (7 - *d) + (jan1 - 1);
 438 
 439         *w = j / 7;
 440         if (jan1 > 4) {
 441             *w -= 1;
 442         }
 443     }
 444 
 445     *y = year_num;
 446     crm_trace("Converted %.4d-%.3d to %.4d-W%.2d-%d", dt->years, dt->days, *y, *w, *d);
 447     return TRUE;
 448 }
 449 
 450 #define DATE_MAX 128
 451 
 452 static void
 453 crm_duration_as_string(crm_time_t *dt, char *result)
     /*  */
 454 {
 455     size_t offset = 0;
 456 
 457     if (dt->years) {
 458         offset += snprintf(result + offset, DATE_MAX - offset, "%4d year%s ",
 459                            dt->years, pcmk__plural_s(dt->years));
 460     }
 461     if (dt->months) {
 462         offset += snprintf(result + offset, DATE_MAX - offset, "%2d month%s ",
 463                            dt->months, pcmk__plural_s(dt->months));
 464     }
 465     if (dt->days) {
 466         offset += snprintf(result + offset, DATE_MAX - offset, "%2d day%s ",
 467                            dt->days, pcmk__plural_s(dt->days));
 468     }
 469 
 470     if (((offset == 0) || (dt->seconds != 0))
 471         && (dt->seconds > -60) && (dt->seconds < 60)) {
 472         offset += snprintf(result + offset, DATE_MAX - offset, "%d second%s",
 473                            dt->seconds, pcmk__plural_s(dt->seconds));
 474     } else if (dt->seconds) {
 475         uint h = 0, m = 0, s = 0;
 476 
 477         offset += snprintf(result + offset, DATE_MAX - offset, "%d seconds (",
 478                            dt->seconds);
 479         crm_time_get_sec(dt->seconds, &h, &m, &s);
 480         if (h) {
 481             offset += snprintf(result + offset, DATE_MAX - offset, "%u hour%s%s",
 482                                h, pcmk__plural_s(h), ((m || s)? " " : ""));
 483         }
 484         if (m) {
 485             offset += snprintf(result + offset, DATE_MAX - offset, "%u minute%s%s",
 486                                m, pcmk__plural_s(m), (s? " " : ""));
 487         }
 488         if (s) {
 489             offset += snprintf(result + offset, DATE_MAX - offset, "%u second%s",
 490                                s, pcmk__plural_s(s));
 491         }
 492         offset += snprintf(result + offset, DATE_MAX - offset, ")");
 493     }
 494 }
 495 
 496 char *
 497 crm_time_as_string(crm_time_t * date_time, int flags)
     /*  */
 498 {
 499     crm_time_t *dt = NULL;
 500     crm_time_t *utc = NULL;
 501     char result[DATE_MAX] = { '\0', };
 502     char *result_copy = NULL;
 503     size_t offset = 0;
 504 
 505     // Convert to UTC if local timezone was not requested
 506     if (date_time && date_time->offset
 507         && !pcmk_is_set(flags, crm_time_log_with_timezone)) {
 508         crm_trace("UTC conversion");
 509         utc = crm_get_utc_time(date_time);
 510         dt = utc;
 511     } else {
 512         dt = date_time;
 513     }
 514 
 515     if (!crm_time_is_defined(dt)) {
 516         strcpy(result, "<undefined time>");
 517         goto done;
 518     }
 519 
 520     // Simple cases: as duration, seconds, or seconds since epoch
 521 
 522     if (flags & crm_time_log_duration) {
 523         crm_duration_as_string(date_time, result);
 524         goto done;
 525     }
 526 
 527     if (flags & crm_time_seconds) {
 528         snprintf(result, DATE_MAX, "%lld", crm_time_get_seconds(date_time));
 529         goto done;
 530     }
 531 
 532     if (flags & crm_time_epoch) {
 533         snprintf(result, DATE_MAX, "%lld",
 534                  crm_time_get_seconds_since_epoch(date_time));
 535         goto done;
 536     }
 537 
 538     // As readable string
 539 
 540     if (flags & crm_time_log_date) {
 541         if (flags & crm_time_weeks) { // YYYY-WW-D
 542             uint y, w, d;
 543 
 544             if (crm_time_get_isoweek(dt, &y, &w, &d)) {
 545                 offset += snprintf(result + offset, DATE_MAX - offset,
 546                                    "%u-W%.2u-%u", y, w, d);
 547             }
 548 
 549         } else if (flags & crm_time_ordinal) { // YYYY-DDD
 550             uint y, d;
 551 
 552             if (crm_time_get_ordinal(dt, &y, &d)) {
 553                 offset += snprintf(result + offset, DATE_MAX - offset,
 554                                    "%u-%.3u", y, d);
 555             }
 556 
 557         } else { // YYYY-MM-DD
 558             uint y, m, d;
 559 
 560             if (crm_time_get_gregorian(dt, &y, &m, &d)) {
 561                 offset += snprintf(result + offset, DATE_MAX - offset,
 562                                    "%.4u-%.2u-%.2u", y, m, d);
 563             }
 564         }
 565     }
 566 
 567     if (flags & crm_time_log_timeofday) {
 568         uint h = 0, m = 0, s = 0;
 569 
 570         if (offset > 0) {
 571             offset += snprintf(result + offset, DATE_MAX - offset, " ");
 572         }
 573 
 574         if (crm_time_get_timeofday(dt, &h, &m, &s)) {
 575             offset += snprintf(result + offset, DATE_MAX - offset,
 576                                "%.2u:%.2u:%.2u", h, m, s);
 577         }
 578 
 579         if ((flags & crm_time_log_with_timezone) && (dt->offset != 0)) {
 580             crm_time_get_sec(dt->offset, &h, &m, &s);
 581             offset += snprintf(result + offset, DATE_MAX - offset,
 582                                " %c%.2u:%.2u",
 583                                ((dt->offset < 0)? '-' : '+'), h, m);
 584         } else {
 585             offset += snprintf(result + offset, DATE_MAX - offset, "Z");
 586         }
 587     }
 588 
 589   done:
 590     crm_time_free(utc);
 591 
 592     result_copy = strdup(result);
 593     CRM_ASSERT(result_copy != NULL);
 594     return result_copy;
 595 }
 596 
 597 /*!
 598  * \internal
 599  * \brief Determine number of seconds from an hour:minute:second string
 600  *
 601  * \param[in]  time_str  Time specification string
 602  * \param[out] result    Number of seconds equivalent to time_str
 603  *
 604  * \return TRUE if specification was valid, FALSE (and set errno) otherwise
 605  * \note This may return the number of seconds in a day (which is out of bounds
 606  *       for a time object) if given 24:00:00.
 607  */
 608 static bool
 609 crm_time_parse_sec(const char *time_str, int *result)
     /*  */
 610 {
 611     int rc;
 612     uint hour = 0;
 613     uint minute = 0;
 614     uint second = 0;
 615 
 616     *result = 0;
 617 
 618     // Must have at least hour, but minutes and seconds are optional
 619     rc = sscanf(time_str, "%d:%d:%d", &hour, &minute, &second);
 620     if (rc == 1) {
 621         rc = sscanf(time_str, "%2d%2d%2d", &hour, &minute, &second);
 622     }
 623     if (rc == 0) {
 624         crm_err("%s is not a valid ISO 8601 time specification", time_str);
 625         errno = EINVAL;
 626         return FALSE;
 627     }
 628 
 629     crm_trace("Got valid time: %.2d:%.2d:%.2d", hour, minute, second);
 630 
 631     if ((hour == 24) && (minute == 0) && (second == 0)) {
 632         // Equivalent to 00:00:00 of next day, return number of seconds in day
 633     } else if (hour >= 24) {
 634         crm_err("%s is not a valid ISO 8601 time specification "
 635                 "because %d is not a valid hour", time_str, hour);
 636         errno = EINVAL;
 637         return FALSE;
 638     }
 639     if (minute >= 60) {
 640         crm_err("%s is not a valid ISO 8601 time specification "
 641                 "because %d is not a valid minute", time_str, minute);
 642         errno = EINVAL;
 643         return FALSE;
 644     }
 645     if (second >= 60) {
 646         crm_err("%s is not a valid ISO 8601 time specification "
 647                 "because %d is not a valid second", time_str, second);
 648         errno = EINVAL;
 649         return FALSE;
 650     }
 651 
 652     *result = (hour * HOUR_SECONDS) + (minute * 60) + second;
 653     return TRUE;
 654 }
 655 
 656 static bool
 657 crm_time_parse_offset(const char *offset_str, int *offset)
     /*  */
 658 {
 659     tzset();
 660 
 661     if (offset_str == NULL) {
 662         // Use local offset
 663 #if defined(HAVE_STRUCT_TM_TM_GMTOFF)
 664         time_t now = time(NULL);
 665         struct tm *now_tm = localtime(&now);
 666 #endif
 667         int h_offset = GMTOFF(now_tm) / HOUR_SECONDS;
 668         int m_offset = (GMTOFF(now_tm) - (HOUR_SECONDS * h_offset)) / 60;
 669 
 670         if (h_offset < 0 && m_offset < 0) {
 671             m_offset = 0 - m_offset;
 672         }
 673         *offset = (HOUR_SECONDS * h_offset) + (60 * m_offset);
 674         return TRUE;
 675     }
 676 
 677     if (offset_str[0] == 'Z') { // @TODO invalid if anything after?
 678         *offset = 0;
 679         return TRUE;
 680     }
 681 
 682     *offset = 0;
 683     if ((offset_str[0] == '+') || (offset_str[0] == '-')
 684         || isdigit((int)offset_str[0])) {
 685 
 686         gboolean negate = FALSE;
 687 
 688         if (offset_str[0] == '+') {
 689             offset_str++;
 690         } else if (offset_str[0] == '-') {
 691             negate = TRUE;
 692             offset_str++;
 693         }
 694         if (crm_time_parse_sec(offset_str, offset) == FALSE) {
 695             return FALSE;
 696         }
 697         if (negate) {
 698             *offset = 0 - *offset;
 699         }
 700     } // @TODO else invalid?
 701     return TRUE;
 702 }
 703 
 704 /*!
 705  * \internal
 706  * \brief Parse the time portion of an ISO 8601 date/time string
 707  *
 708  * \param[in]     time_str  Time portion of specification (after any 'T')
 709  * \param[in,out] a_time    Time object to parse into
 710  *
 711  * \return TRUE if valid time was parsed, FALSE (and set errno) otherwise
 712  * \note This may add a day to a_time (if the time is 24:00:00).
 713  */
 714 static bool
 715 crm_time_parse(const char *time_str, crm_time_t *a_time)
     /*  */
 716 {
 717     uint h, m, s;
 718     char *offset_s = NULL;
 719 
 720     tzset();
 721 
 722     if (time_str) {
 723         if (crm_time_parse_sec(time_str, &(a_time->seconds)) == FALSE) {
 724             return FALSE;
 725         }
 726         offset_s = strstr(time_str, "Z");
 727         if (offset_s == NULL) {
 728             offset_s = strstr(time_str, " ");
 729             if (offset_s) {
 730                 while (isspace(offset_s[0])) {
 731                     offset_s++;
 732                 }
 733             }
 734         }
 735     }
 736 
 737     if (crm_time_parse_offset(offset_s, &(a_time->offset)) == FALSE) {
 738         return FALSE;
 739     }
 740     crm_time_get_sec(a_time->offset, &h, &m, &s);
 741     crm_trace("Got tz: %c%2.d:%.2d", ((a_time->offset < 0)? '-' : '+'), h, m);
 742 
 743     if (a_time->seconds == DAY_SECONDS) {
 744         // 24:00:00 == 00:00:00 of next day
 745         a_time->seconds = 0;
 746         crm_time_add_days(a_time, 1);
 747     }
 748     return TRUE;
 749 }
 750 
 751 /*
 752  * \internal
 753  * \brief Parse a time object from an ISO 8601 date/time specification
 754  *
 755  * \param[in] date_str  ISO 8601 date/time specification (or "epoch")
 756  *
 757  * \return New time object on success, NULL (and set errno) otherwise
 758  */
 759 static crm_time_t *
 760 parse_date(const char *date_str)
     /*  */
 761 {
 762     const char *time_s = NULL;
 763     crm_time_t *dt = NULL;
 764 
 765     int year = 0;
 766     int month = 0;
 767     int week = 0;
 768     int day = 0;
 769     int rc = 0;
 770 
 771     if (pcmk__str_empty(date_str)) {
 772         crm_err("No ISO 8601 date/time specification given");
 773         goto invalid;
 774     }
 775 
 776     if ((date_str[0] == 'T') || (date_str[2] == ':')) {
 777         /* Just a time supplied - Infer current date */
 778         dt = crm_time_new(NULL);
 779         if (date_str[0] == 'T') {
 780             time_s = date_str + 1;
 781         } else {
 782             time_s = date_str;
 783         }
 784         goto parse_time;
 785     }
 786 
 787     dt = crm_time_new_undefined();
 788 
 789     if (!strncasecmp("epoch", date_str, 5)
 790         && ((date_str[5] == '\0') || (date_str[5] == '/') || isspace(date_str[5]))) {
 791         dt->days = 1;
 792         dt->years = 1970;
 793         crm_time_log(LOG_TRACE, "Unpacked", dt, crm_time_log_date | crm_time_log_timeofday);
 794         return dt;
 795     }
 796 
 797     /* YYYY-MM-DD */
 798     rc = sscanf(date_str, "%d-%d-%d", &year, &month, &day);
 799     if (rc == 1) {
 800         /* YYYYMMDD */
 801         rc = sscanf(date_str, "%4d%2d%2d", &year, &month, &day);
 802     }
 803     if (rc == 3) {
 804         if (month > 12) {
 805             crm_err("'%s' is not a valid ISO 8601 date/time specification "
 806                     "because '%d' is not a valid month", date_str, month);
 807             goto invalid;
 808         } else if (day > crm_time_days_in_month(month, year)) {
 809             crm_err("'%s' is not a valid ISO 8601 date/time specification "
 810                     "because '%d' is not a valid day of the month",
 811                     date_str, day);
 812             goto invalid;
 813         } else {
 814             dt->years = year;
 815             dt->days = get_ordinal_days(year, month, day);
 816             crm_trace("Parsed Gregorian date '%.4d-%.3d' from date string '%s'",
 817                       year, dt->days, date_str);
 818         }
 819         goto parse_time;
 820     }
 821 
 822     /* YYYY-DDD */
 823     rc = sscanf(date_str, "%d-%d", &year, &day);
 824     if (rc == 2) {
 825         if (day > year_days(year)) {
 826             crm_err("'%s' is not a valid ISO 8601 date/time specification "
 827                     "because '%d' is not a valid day of the year (max %d)",
 828                     date_str, day, year_days(year));
 829             goto invalid;
 830         }
 831         crm_trace("Parsed ordinal year %d and days %d from date string '%s'",
 832                   year, day, date_str);
 833         dt->days = day;
 834         dt->years = year;
 835         goto parse_time;
 836     }
 837 
 838     /* YYYY-Www-D */
 839     rc = sscanf(date_str, "%d-W%d-%d", &year, &week, &day);
 840     if (rc == 3) {
 841         if (week > crm_time_weeks_in_year(year)) {
 842             crm_err("'%s' is not a valid ISO 8601 date/time specification "
 843                     "because '%d' is not a valid week of the year (max %d)",
 844                     date_str, week, crm_time_weeks_in_year(year));
 845             goto invalid;
 846         } else if (day < 1 || day > 7) {
 847             crm_err("'%s' is not a valid ISO 8601 date/time specification "
 848                     "because '%d' is not a valid day of the week",
 849                     date_str, day);
 850             goto invalid;
 851         } else {
 852             /*
 853              * See https://en.wikipedia.org/wiki/ISO_week_date
 854              *
 855              * Monday 29 December 2008 is written "2009-W01-1"
 856              * Sunday 3 January 2010 is written "2009-W53-7"
 857              * Saturday 27 September 2008 is written "2008-W37-6"
 858              *
 859              * If 1 January is on a Monday, Tuesday, Wednesday or Thursday, it is in week 01.
 860              * If 1 January is on a Friday, Saturday or Sunday, it is in week 52 or 53 of the previous year.
 861              */
 862             int jan1 = crm_time_january1_weekday(year);
 863 
 864             crm_trace("Got year %d (Jan 1 = %d), week %d, and day %d from date string '%s'",
 865                       year, jan1, week, day, date_str);
 866 
 867             dt->years = year;
 868             crm_time_add_days(dt, (week - 1) * 7);
 869 
 870             if (jan1 <= 4) {
 871                 crm_time_add_days(dt, 1 - jan1);
 872             } else {
 873                 crm_time_add_days(dt, 8 - jan1);
 874             }
 875 
 876             crm_time_add_days(dt, day);
 877         }
 878         goto parse_time;
 879     }
 880 
 881     crm_err("'%s' is not a valid ISO 8601 date/time specification", date_str);
 882     goto invalid;
 883 
 884   parse_time:
 885 
 886     if (time_s == NULL) {
 887         time_s = date_str + strspn(date_str, "0123456789-W");
 888         if ((time_s[0] == ' ') || (time_s[0] == 'T')) {
 889             ++time_s;
 890         } else {
 891             time_s = NULL;
 892         }
 893     }
 894     if ((time_s != NULL) && (crm_time_parse(time_s, dt) == FALSE)) {
 895         goto invalid;
 896     }
 897 
 898     crm_time_log(LOG_TRACE, "Unpacked", dt, crm_time_log_date | crm_time_log_timeofday);
 899     if (crm_time_check(dt) == FALSE) {
 900         crm_err("'%s' is not a valid ISO 8601 date/time specification",
 901                 date_str);
 902         goto invalid;
 903     }
 904     return dt;
 905 
 906 invalid:
 907     crm_time_free(dt);
 908     errno = EINVAL;
 909     return NULL;
 910 }
 911 
 912 // Parse an ISO 8601 numeric value and return number of characters consumed
 913 // @TODO This cannot handle >INT_MAX int values
 914 // @TODO Fractions appear to be not working
 915 // @TODO Error out on invalid specifications
 916 static int
 917 parse_int(const char *str, int field_width, int upper_bound, int *result)
     /*  */
 918 {
 919     int lpc = 0;
 920     int offset = 0;
 921     int intermediate = 0;
 922     gboolean fraction = FALSE;
 923     gboolean negate = FALSE;
 924 
 925     *result = 0;
 926     if (*str == '\0') {
 927         return 0;
 928     }
 929 
 930     if (str[offset] == 'T') {
 931         offset++;
 932     }
 933 
 934     if (str[offset] == '.' || str[offset] == ',') {
 935         fraction = TRUE;
 936         field_width = -1;
 937         offset++;
 938     } else if (str[offset] == '-') {
 939         negate = TRUE;
 940         offset++;
 941     } else if (str[offset] == '+' || str[offset] == ':') {
 942         offset++;
 943     }
 944 
 945     for (; (fraction || lpc < field_width) && isdigit((int)str[offset]); lpc++) {
 946         if (fraction) {
 947             intermediate = (str[offset] - '0') / (10 ^ lpc);
 948         } else {
 949             *result *= 10;
 950             intermediate = str[offset] - '0';
 951         }
 952         *result += intermediate;
 953         offset++;
 954     }
 955     if (fraction) {
 956         *result = (int)(*result * upper_bound);
 957 
 958     } else if (upper_bound > 0 && *result > upper_bound) {
 959         *result = upper_bound;
 960     }
 961     if (negate) {
 962         *result = 0 - *result;
 963     }
 964     if (lpc > 0) {
 965         crm_trace("Found int: %d.  Stopped at str[%d]='%c'", *result, lpc, str[lpc]);
 966         return offset;
 967     }
 968     return 0;
 969 }
 970 
 971 /*!
 972  * \brief Parse a time duration from an ISO 8601 duration specification
 973  *
 974  * \param[in] period_s  ISO 8601 duration specification (optionally followed by
 975  *                      whitespace, after which the rest of the string will be
 976  *                      ignored)
 977  *
 978  * \return New time object on success, NULL (and set errno) otherwise
 979  * \note It is the caller's responsibility to return the result using
 980  *       crm_time_free().
 981  */
 982 crm_time_t *
 983 crm_time_parse_duration(const char *period_s)
     /*  */
 984 {
 985     gboolean is_time = FALSE;
 986     crm_time_t *diff = NULL;
 987 
 988     if (pcmk__str_empty(period_s)) {
 989         crm_err("No ISO 8601 time duration given");
 990         goto invalid;
 991     }
 992     if (period_s[0] != 'P') {
 993         crm_err("'%s' is not a valid ISO 8601 time duration "
 994                 "because it does not start with a 'P'", period_s);
 995         goto invalid;
 996     }
 997     if ((period_s[1] == '\0') || isspace(period_s[1])) {
 998         crm_err("'%s' is not a valid ISO 8601 time duration "
 999                 "because nothing follows 'P'", period_s);
1000         goto invalid;
1001     }
1002 
1003     diff = crm_time_new_undefined();
1004     diff->duration = TRUE;
1005 
1006     for (const char *current = period_s + 1;
1007          current[0] && (current[0] != '/') && !isspace(current[0]);
1008          ++current) {
1009 
1010         int an_int = 0, rc;
1011 
1012         if (current[0] == 'T') {
1013             /* A 'T' separates year/month/day from hour/minute/seconds. We don't
1014              * require it strictly, but just use it to differentiate month from
1015              * minutes.
1016              */
1017             is_time = TRUE;
1018             continue;
1019         }
1020 
1021         // An integer must be next
1022         rc = parse_int(current, 10, 0, &an_int);
1023         if (rc == 0) {
1024             crm_err("'%s' is not a valid ISO 8601 time duration "
1025                     "because no integer at '%s'", period_s, current);
1026             goto invalid;
1027         }
1028         current += rc;
1029 
1030         // A time unit must be next (we're not strict about the order)
1031         switch (current[0]) {
1032             case 'Y':
1033                 diff->years = an_int;
1034                 break;
1035             case 'M':
1036                 if (is_time) {
1037                     /* Minutes */
1038                     diff->seconds += an_int * 60;
1039                 } else {
1040                     diff->months = an_int;
1041                 }
1042                 break;
1043             case 'W':
1044                 diff->days += an_int * 7;
1045                 break;
1046             case 'D':
1047                 diff->days += an_int;
1048                 break;
1049             case 'H':
1050                 diff->seconds += an_int * HOUR_SECONDS;
1051                 break;
1052             case 'S':
1053                 diff->seconds += an_int;
1054                 break;
1055             case '\0':
1056                 crm_err("'%s' is not a valid ISO 8601 time duration "
1057                         "because no units after %d", period_s, an_int);
1058                 goto invalid;
1059             default:
1060                 crm_err("'%s' is not a valid ISO 8601 time duration "
1061                         "because '%c' is not a valid time unit",
1062                         period_s, current[0]);
1063                 goto invalid;
1064         }
1065     }
1066 
1067     if (!crm_time_is_defined(diff)) {
1068         crm_err("'%s' is not a valid ISO 8601 time duration "
1069                 "because no amounts and units given", period_s);
1070         goto invalid;
1071     }
1072     return diff;
1073 
1074 invalid:
1075     crm_time_free(diff);
1076     errno = EINVAL;
1077     return NULL;
1078 }
1079 
1080 /*!
1081  * \brief Parse a time period from an ISO 8601 interval specification
1082  *
1083  * \param[in] period_str  ISO 8601 interval specification (start/end,
1084  *                        start/duration, or duration/end)
1085  *
1086  * \return New time period object on success, NULL (and set errno) otherwise
1087  * \note The caller is responsible for freeing the result using
1088  *       crm_time_free_period().
1089  */
1090 crm_time_period_t *
1091 crm_time_parse_period(const char *period_str)
     /*  */
1092 {
1093     const char *original = period_str;
1094     crm_time_period_t *period = NULL;
1095 
1096     if (pcmk__str_empty(period_str)) {
1097         crm_err("No ISO 8601 time period given");
1098         goto invalid;
1099     }
1100 
1101     tzset();
1102     period = calloc(1, sizeof(crm_time_period_t));
1103     CRM_ASSERT(period != NULL);
1104 
1105     if (period_str[0] == 'P') {
1106         period->diff = crm_time_parse_duration(period_str);
1107         if (period->diff == NULL) {
1108             goto error;
1109         }
1110     } else {
1111         period->start = parse_date(period_str);
1112         if (period->start == NULL) {
1113             goto error;
1114         }
1115     }
1116 
1117     period_str = strstr(original, "/");
1118     if (period_str) {
1119         ++period_str;
1120         if (period_str[0] == 'P') {
1121             if (period->diff != NULL) {
1122                 crm_err("'%s' is not a valid ISO 8601 time period "
1123                         "because it has two durations",
1124                         original);
1125                 goto invalid;
1126             }
1127             period->diff = crm_time_parse_duration(period_str);
1128             if (period->diff == NULL) {
1129                 goto error;
1130             }
1131         } else {
1132             period->end = parse_date(period_str);
1133             if (period->end == NULL) {
1134                 goto error;
1135             }
1136         }
1137 
1138     } else if (period->diff != NULL) {
1139         // Only duration given, assume start is now
1140         period->start = crm_time_new(NULL);
1141 
1142     } else {
1143         // Only start given
1144         crm_err("'%s' is not a valid ISO 8601 time period "
1145                 "because it has no duration or ending time",
1146                 original);
1147         goto invalid;
1148     }
1149 
1150     if (period->start == NULL) {
1151         period->start = crm_time_subtract(period->end, period->diff);
1152 
1153     } else if (period->end == NULL) {
1154         period->end = crm_time_add(period->start, period->diff);
1155     }
1156 
1157     if (crm_time_check(period->start) == FALSE) {
1158         crm_err("'%s' is not a valid ISO 8601 time period "
1159                 "because the start is invalid", period_str);
1160         goto invalid;
1161     }
1162     if (crm_time_check(period->end) == FALSE) {
1163         crm_err("'%s' is not a valid ISO 8601 time period "
1164                 "because the end is invalid", period_str);
1165         goto invalid;
1166     }
1167     return period;
1168 
1169 invalid:
1170     errno = EINVAL;
1171 error:
1172     crm_time_free_period(period);
1173     return NULL;
1174 }
1175 
1176 /*!
1177  * \brief Free a dynamically allocated time period object
1178  *
1179  * \param[in] period  Time period to free
1180  */
1181 void
1182 crm_time_free_period(crm_time_period_t *period)
     /*  */
1183 {
1184     if (period) {
1185         crm_time_free(period->start);
1186         crm_time_free(period->end);
1187         crm_time_free(period->diff);
1188         free(period);
1189     }
1190 }
1191 
1192 void
1193 crm_time_set(crm_time_t * target, crm_time_t * source)
     /*  */
1194 {
1195     crm_trace("target=%p, source=%p", target, source);
1196 
1197     CRM_CHECK(target != NULL && source != NULL, return);
1198 
1199     target->years = source->years;
1200     target->days = source->days;
1201     target->months = source->months;    /* Only for durations */
1202     target->seconds = source->seconds;
1203     target->offset = source->offset;
1204 
1205     crm_time_log(LOG_TRACE, "source", source,
1206                  crm_time_log_date | crm_time_log_timeofday | crm_time_log_with_timezone);
1207     crm_time_log(LOG_TRACE, "target", target,
1208                  crm_time_log_date | crm_time_log_timeofday | crm_time_log_with_timezone);
1209 }
1210 
1211 static void
1212 ha_set_tm_time(crm_time_t * target, struct tm *source)
     /*  */
1213 {
1214     int h_offset = 0;
1215     int m_offset = 0;
1216 
1217     /* Ensure target is fully initialized */
1218     target->years = 0;
1219     target->months = 0;
1220     target->days = 0;
1221     target->seconds = 0;
1222     target->offset = 0;
1223     target->duration = FALSE;
1224 
1225     if (source->tm_year > 0) {
1226         /* years since 1900 */
1227         target->years = 1900 + source->tm_year;
1228     }
1229 
1230     if (source->tm_yday >= 0) {
1231         /* days since January 1 [0-365] */
1232         target->days = 1 + source->tm_yday;
1233     }
1234 
1235     if (source->tm_hour >= 0) {
1236         target->seconds += HOUR_SECONDS * source->tm_hour;
1237     }
1238     if (source->tm_min >= 0) {
1239         target->seconds += 60 * source->tm_min;
1240     }
1241     if (source->tm_sec >= 0) {
1242         target->seconds += source->tm_sec;
1243     }
1244 
1245     /* tm_gmtoff == offset from UTC in seconds */
1246     h_offset = GMTOFF(source) / HOUR_SECONDS;
1247     m_offset = (GMTOFF(source) - (HOUR_SECONDS * h_offset)) / 60;
1248     crm_trace("Offset (s): %ld, offset (hh:mm): %.2d:%.2d", GMTOFF(source), h_offset, m_offset);
1249 
1250     target->offset += HOUR_SECONDS * h_offset;
1251     target->offset += 60 * m_offset;
1252 }
1253 
1254 void
1255 crm_time_set_timet(crm_time_t * target, time_t * source)
     /*  */
1256 {
1257     ha_set_tm_time(target, localtime(source));
1258 }
1259 
1260 crm_time_t *
1261 pcmk_copy_time(crm_time_t *source)
     /*  */
1262 {
1263     crm_time_t *target = crm_time_new_undefined();
1264 
1265     crm_time_set(target, source);
1266     return target;
1267 }
1268 
1269 crm_time_t *
1270 crm_time_add(crm_time_t * dt, crm_time_t * value)
     /*  */
1271 {
1272     crm_time_t *utc = NULL;
1273     crm_time_t *answer = NULL;
1274 
1275     if ((dt == NULL) || (value == NULL)) {
1276         errno = EINVAL;
1277         return NULL;
1278     }
1279 
1280     answer = pcmk_copy_time(dt);
1281 
1282     utc = crm_get_utc_time(value);
1283     if (utc == NULL) {
1284         crm_time_free(answer);
1285         return NULL;
1286     }
1287 
1288     answer->years += utc->years;
1289     crm_time_add_months(answer, utc->months);
1290     crm_time_add_days(answer, utc->days);
1291     crm_time_add_seconds(answer, utc->seconds);
1292 
1293     crm_time_free(utc);
1294     return answer;
1295 }
1296 
1297 crm_time_t *
1298 crm_time_calculate_duration(crm_time_t * dt, crm_time_t * value)
     /*  */
1299 {
1300     crm_time_t *utc = NULL;
1301     crm_time_t *answer = NULL;
1302 
1303     if ((dt == NULL) || (value == NULL)) {
1304         errno = EINVAL;
1305         return NULL;
1306     }
1307 
1308     utc = crm_get_utc_time(value);
1309     if (utc == NULL) {
1310         return NULL;
1311     }
1312 
1313     answer = crm_get_utc_time(dt);
1314     if (answer == NULL) {
1315         crm_time_free(utc);
1316         return NULL;
1317     }
1318     answer->duration = TRUE;
1319 
1320     answer->years -= utc->years;
1321     if(utc->months != 0) {
1322         crm_time_add_months(answer, -utc->months);
1323     }
1324     crm_time_add_days(answer, -utc->days);
1325     crm_time_add_seconds(answer, -utc->seconds);
1326 
1327     crm_time_free(utc);
1328     return answer;
1329 }
1330 
1331 crm_time_t *
1332 crm_time_subtract(crm_time_t * dt, crm_time_t * value)
     /*  */
1333 {
1334     crm_time_t *utc = NULL;
1335     crm_time_t *answer = NULL;
1336 
1337     if ((dt == NULL) || (value == NULL)) {
1338         errno = EINVAL;
1339         return NULL;
1340     }
1341 
1342     utc = crm_get_utc_time(value);
1343     if (utc == NULL) {
1344         return NULL;
1345     }
1346 
1347     answer = pcmk_copy_time(dt);
1348     answer->years -= utc->years;
1349     if(utc->months != 0) {
1350         crm_time_add_months(answer, -utc->months);
1351     }
1352     crm_time_add_days(answer, -utc->days);
1353     crm_time_add_seconds(answer, -utc->seconds);
1354 
1355     return answer;
1356 }
1357 
1358 /*!
1359  * \brief Check whether a time object represents a sensible date/time
1360  *
1361  * \param[in] dt  Date/time object to check
1362  *
1363  * \return TRUE if years, days, and seconds are sensible, FALSE otherwise
1364  */
1365 bool
1366 crm_time_check(crm_time_t * dt)
     /*  */
1367 {
1368     return (dt != NULL)
1369            && (dt->days > 0) && (dt->days <= year_days(dt->years))
1370            && (dt->seconds >= 0) && (dt->seconds < DAY_SECONDS);
1371 }
1372 
1373 #define do_cmp_field(l, r, field)                                       \
1374     if(rc == 0) {                                                       \
1375                 if(l->field > r->field) {                               \
1376                         crm_trace("%s: %d > %d",                        \
1377                                     #field, l->field, r->field);        \
1378                         rc = 1;                                         \
1379                 } else if(l->field < r->field) {                        \
1380                         crm_trace("%s: %d < %d",                        \
1381                                     #field, l->field, r->field);        \
1382                         rc = -1;                                        \
1383                 }                                                       \
1384     }
1385 
1386 int
1387 crm_time_compare(crm_time_t *a, crm_time_t *b)
     /*  */
1388 {
1389     int rc = 0;
1390     crm_time_t *t1 = crm_get_utc_time(a);
1391     crm_time_t *t2 = crm_get_utc_time(b);
1392 
1393     if ((t1 == NULL) && (t2 == NULL)) {
1394         rc = 0;
1395     } else if (t1 == NULL) {
1396         rc = -1;
1397     } else if (t2 == NULL) {
1398         rc = 1;
1399     } else {
1400         do_cmp_field(t1, t2, years);
1401         do_cmp_field(t1, t2, days);
1402         do_cmp_field(t1, t2, seconds);
1403     }
1404 
1405     crm_time_free(t1);
1406     crm_time_free(t2);
1407     return rc;
1408 }
1409 
1410 /*!
1411  * \brief Add a given number of seconds to a date/time or duration
1412  *
1413  * \param[in] a_time  Date/time or duration to add seconds to
1414  * \param[in] extra   Number of seconds to add
1415  */
1416 void
1417 crm_time_add_seconds(crm_time_t *a_time, int extra)
     /*  */
1418 {
1419     int days = 0;
1420 
1421     crm_trace("Adding %d seconds to %d (max=%d)",
1422               extra, a_time->seconds, DAY_SECONDS);
1423     a_time->seconds += extra;
1424     days = a_time->seconds / DAY_SECONDS;
1425     a_time->seconds %= DAY_SECONDS;
1426 
1427     // Don't have negative seconds
1428     if (a_time->seconds < 0) {
1429         a_time->seconds += DAY_SECONDS;
1430         --days;
1431     }
1432 
1433     crm_time_add_days(a_time, days);
1434 }
1435 
1436 void
1437 crm_time_add_days(crm_time_t * a_time, int extra)
     /*  */
1438 {
1439     int lower_bound = 1;
1440     int ydays = crm_time_leapyear(a_time->years) ? 366 : 365;
1441 
1442     crm_trace("Adding %d days to %.4d-%.3d", extra, a_time->years, a_time->days);
1443 
1444     a_time->days += extra;
1445     while (a_time->days > ydays) {
1446         a_time->years++;
1447         a_time->days -= ydays;
1448         ydays = crm_time_leapyear(a_time->years) ? 366 : 365;
1449     }
1450 
1451     if(a_time->duration) {
1452         lower_bound = 0;
1453     }
1454 
1455     while (a_time->days < lower_bound) {
1456         a_time->years--;
1457         a_time->days += crm_time_leapyear(a_time->years) ? 366 : 365;
1458     }
1459 }
1460 
1461 void
1462 crm_time_add_months(crm_time_t * a_time, int extra)
     /*  */
1463 {
1464     int lpc;
1465     uint32_t y, m, d, dmax;
1466 
1467     crm_time_get_gregorian(a_time, &y, &m, &d);
1468     crm_trace("Adding %d months to %.4d-%.2d-%.2d", extra, y, m, d);
1469 
1470     if (extra > 0) {
1471         for (lpc = extra; lpc > 0; lpc--) {
1472             m++;
1473             if (m == 13) {
1474                 m = 1;
1475                 y++;
1476             }
1477         }
1478     } else {
1479         for (lpc = -extra; lpc > 0; lpc--) {
1480             m--;
1481             if (m == 0) {
1482                 m = 12;
1483                 y--;
1484             }
1485         }
1486     }
1487 
1488     dmax = crm_time_days_in_month(m, y);
1489     if (dmax < d) {
1490         /* Preserve day-of-month unless the month doesn't have enough days */
1491         d = dmax;
1492     }
1493 
1494     crm_trace("Calculated %.4d-%.2d-%.2d", y, m, d);
1495 
1496     a_time->years = y;
1497     a_time->days = get_ordinal_days(y, m, d);
1498 
1499     crm_time_get_gregorian(a_time, &y, &m, &d);
1500     crm_trace("Got %.4d-%.2d-%.2d", y, m, d);
1501 }
1502 
1503 void
1504 crm_time_add_minutes(crm_time_t * a_time, int extra)
     /*  */
1505 {
1506     crm_time_add_seconds(a_time, extra * 60);
1507 }
1508 
1509 void
1510 crm_time_add_hours(crm_time_t * a_time, int extra)
     /*  */
1511 {
1512     crm_time_add_seconds(a_time, extra * HOUR_SECONDS);
1513 }
1514 
1515 void
1516 crm_time_add_weeks(crm_time_t * a_time, int extra)
     /*  */
1517 {
1518     crm_time_add_days(a_time, extra * 7);
1519 }
1520 
1521 void
1522 crm_time_add_years(crm_time_t * a_time, int extra)
     /*  */
1523 {
1524     a_time->years += extra;
1525 }
1526 
1527 static void
1528 ha_get_tm_time( struct tm *target, crm_time_t *source)
     /*  */
1529 {
1530     *target = (struct tm) {
1531         .tm_year = source->years - 1900,
1532         .tm_mday = source->days,
1533         .tm_sec = source->seconds % 60,
1534         .tm_min = ( source->seconds / 60 ) % 60,
1535         .tm_hour = source->seconds / HOUR_SECONDS,
1536         .tm_isdst = -1, /* don't adjust */
1537 
1538 #if defined(HAVE_STRUCT_TM_TM_GMTOFF)
1539         .tm_gmtoff = source->offset
1540 #endif
1541     };
1542     mktime(target);
1543 }
1544 
1545 /* The high-resolution variant of time object was added to meet an immediate
1546  * need, and is kept internal API.
1547  *
1548  * @TODO The long-term goal is to come up with a clean, unified design for a
1549  *       time type (or types) that meets all the various needs, to replace
1550  *       crm_time_t, pcmk__time_hr_t, and struct timespec (in lrmd_cmd_t).
1551  *       Using glib's GDateTime is a possibility (if we are willing to require
1552  *       glib >= 2.26).
1553  */
1554 
1555 pcmk__time_hr_t *
1556 pcmk__time_hr_convert(pcmk__time_hr_t *target, crm_time_t *dt)
     /*  */
1557 {
1558     pcmk__time_hr_t *hr_dt = NULL;
1559 
1560     if (dt) {
1561         hr_dt = target?target:calloc(1, sizeof(pcmk__time_hr_t));
1562         CRM_ASSERT(hr_dt != NULL);
1563         *hr_dt = (pcmk__time_hr_t) {
1564             .years = dt->years,
1565             .months = dt->months,
1566             .days = dt->days,
1567             .seconds = dt->seconds,
1568             .offset = dt->offset,
1569             .duration = dt->duration
1570         };
1571     }
1572 
1573     return hr_dt;
1574 }
1575 
1576 void
1577 pcmk__time_set_hr_dt(crm_time_t *target, pcmk__time_hr_t *hr_dt)
     /*  */
1578 {
1579     CRM_ASSERT((hr_dt) && (target));
1580     *target = (crm_time_t) {
1581         .years = hr_dt->years,
1582         .months = hr_dt->months,
1583         .days = hr_dt->days,
1584         .seconds = hr_dt->seconds,
1585         .offset = hr_dt->offset,
1586         .duration = hr_dt->duration
1587     };
1588 }
1589 
1590 pcmk__time_hr_t *
1591 pcmk__time_timeval_hr_convert(pcmk__time_hr_t *target, struct timeval *tv)
     /*  */
1592 {
1593     crm_time_t dt;
1594     pcmk__time_hr_t *ret;
1595 
1596     crm_time_set_timet(&dt, &tv->tv_sec);
1597     ret = pcmk__time_hr_convert(target, &dt);
1598     if (ret) {
1599         ret->useconds = tv->tv_usec;
1600     }
1601     return ret;
1602 }
1603 
1604 pcmk__time_hr_t *
1605 pcmk__time_hr_new(const char *date_time)
     /*  */
1606 {
1607     pcmk__time_hr_t *hr_dt = NULL;
1608     struct timeval tv_now;
1609 
1610     if (!date_time) {
1611         if (gettimeofday(&tv_now, NULL) == 0) {
1612             hr_dt = pcmk__time_timeval_hr_convert(NULL, &tv_now);
1613         }
1614     } else {
1615         crm_time_t *dt;
1616 
1617         dt = parse_date(date_time);
1618         hr_dt = pcmk__time_hr_convert(NULL, dt);
1619         crm_time_free(dt);
1620     }
1621     return hr_dt;
1622 }
1623 
1624 void
1625 pcmk__time_hr_free(pcmk__time_hr_t * hr_dt)
     /*  */
1626 {
1627     free(hr_dt);
1628 }
1629 
1630 char *
1631 pcmk__time_format_hr(const char *format, pcmk__time_hr_t * hr_dt)
     /*  */
1632 {
1633     const char *mark_s;
1634     int max = 128, scanned_pos = 0, printed_pos = 0, fmt_pos = 0,
1635         date_len = 0, nano_digits = 0;
1636     char nano_s[10], date_s[max+1], nanofmt_s[5] = "%", *tmp_fmt_s;
1637     struct tm tm;
1638     crm_time_t dt;
1639 
1640     if (!format) {
1641         return NULL;
1642     }
1643     pcmk__time_set_hr_dt(&dt, hr_dt);
1644     ha_get_tm_time(&tm, &dt);
1645     sprintf(nano_s, "%06d000", hr_dt->useconds);
1646 
1647     while ((format[scanned_pos]) != '\0') {
1648         mark_s = strchr(&format[scanned_pos], '%');
1649         if (mark_s) {
1650             int fmt_len = 1;
1651 
1652             fmt_pos = mark_s - format;
1653             while ((format[fmt_pos+fmt_len] != '\0') &&
1654                 (format[fmt_pos+fmt_len] >= '0') &&
1655                 (format[fmt_pos+fmt_len] <= '9')) {
1656                 fmt_len++;
1657             }
1658             scanned_pos = fmt_pos + fmt_len + 1;
1659             if (format[fmt_pos+fmt_len] == 'N') {
1660                 nano_digits = atoi(&format[fmt_pos+1]);
1661                 nano_digits = (nano_digits > 6)?6:nano_digits;
1662                 nano_digits = (nano_digits < 0)?0:nano_digits;
1663                 sprintf(&nanofmt_s[1], ".%ds", nano_digits);
1664             } else {
1665                 if (format[scanned_pos] != '\0') {
1666                     continue;
1667                 }
1668                 fmt_pos = scanned_pos; /* print till end */
1669             }
1670         } else {
1671             scanned_pos = strlen(format);
1672             fmt_pos = scanned_pos; /* print till end */
1673         }
1674         tmp_fmt_s = strndup(&format[printed_pos], fmt_pos - printed_pos);
1675 #ifdef GCC_FORMAT_NONLITERAL_CHECKING_ENABLED
1676 #pragma GCC diagnostic push
1677 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
1678 #endif
1679         date_len += strftime(&date_s[date_len], max-date_len, tmp_fmt_s, &tm);
1680 #ifdef GCC_FORMAT_NONLITERAL_CHECKING_ENABLED
1681 #pragma GCC diagnostic pop
1682 #endif
1683         printed_pos = scanned_pos;
1684         free(tmp_fmt_s);
1685         if (nano_digits) {
1686 #ifdef GCC_FORMAT_NONLITERAL_CHECKING_ENABLED
1687 #pragma GCC diagnostic push
1688 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
1689 #endif
1690             date_len += snprintf(&date_s[date_len], max-date_len,
1691                                  nanofmt_s, nano_s);
1692 #ifdef GCC_FORMAT_NONLITERAL_CHECKING_ENABLED
1693 #pragma GCC diagnostic pop
1694 #endif
1695             nano_digits = 0;
1696         }
1697     }
1698 
1699     return (date_len == 0)?NULL:strdup(date_s);
1700 }
1701 
1702 /*!
1703  * \internal
1704  * \brief Return human-friendly string corresponding to a time
1705  *
1706  * \param[in] when   Pointer to epoch time value (or NULL for current time)
1707  *
1708  * \return Current time as string (as by ctime() but without newline) on
1709  *         success, NULL otherwise
1710  * \note The return value points to a statically allocated string which might be
1711  *       overwritten by subsequent calls to any of the C library date and time
1712  *       functions.
1713  */
1714 const char *
1715 pcmk__epoch2str(time_t *when)
     /*  */
1716 {
1717     char *since_epoch = NULL;
1718 
1719     if (when == NULL) {
1720         time_t a_time = time(NULL);
1721 
1722         if (a_time == (time_t) -1) {
1723             return NULL;
1724         } else {
1725             since_epoch = ctime(&a_time);
1726         }
1727     } else {
1728         since_epoch = ctime(when);
1729     }
1730 
1731     if (since_epoch == NULL) {
1732         return NULL;
1733     } else {
1734         return crm_strip_trailing_newline(since_epoch);
1735     }
1736 }
/* */
root/lib/common/iso8601.c

DEFINITIONS
