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date.h File Reference

Time and date handling routines. More...

#include <stdbool.h>
#include <stdint.h>
#include <time.h>
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Go to the source code of this file.

Data Structures

struct  Tz
 List of recognised Timezones. More...
 

Macros

#define TIME_T_MAX   ((((time_t) 1 << (sizeof(time_t) * 8 - 2)) - 1) * 2 + 1)
 
#define TIME_T_MIN   (-TIME_T_MAX - 1)
 
#define TM_YEAR_MAX   (1970 + (((((TIME_T_MAX - 59) / 60) - 59) / 60) - 23) / 24 / 366)
 
#define TM_YEAR_MIN   (1970 - (TM_YEAR_MAX - 1970) - 1)
 
#define MUTT_DATE_NOW   -9999
 Constant representing the 'current time', see: mutt_date_gmtime(), mutt_date_localtime() More...
 

Functions

time_t mutt_date_add_timeout (time_t now, time_t timeout)
 Safely add a timeout to a given time_t value. More...
 
int mutt_date_check_month (const char *s)
 Is the string a valid month name. More...
 
time_t mutt_date_epoch (void)
 Return the number of seconds since the Unix epoch. More...
 
uint64_t mutt_date_epoch_ms (void)
 Return the number of milliseconds since the Unix epoch. More...
 
struct tm mutt_date_gmtime (time_t t)
 Converts calendar time to a broken-down time structure expressed in UTC timezone. More...
 
size_t mutt_date_localtime_format (char *buf, size_t buflen, const char *format, time_t t)
 Format localtime. More...
 
struct tm mutt_date_localtime (time_t t)
 Converts calendar time to a broken-down time structure expressed in user timezone. More...
 
time_t mutt_date_local_tz (time_t t)
 Calculate the local timezone in seconds east of UTC. More...
 
void mutt_date_make_date (struct Buffer *buf)
 Write a date in RFC822 format to a buffer. More...
 
int mutt_date_make_imap (char *buf, size_t buflen, time_t timestamp)
 Format date in IMAP style: DD-MMM-YYYY HH:MM:SS +ZZzz. More...
 
time_t mutt_date_make_time (struct tm *t, bool local)
 Convert struct tm to time_t More...
 
int mutt_date_make_tls (char *buf, size_t buflen, time_t timestamp)
 Format date in TLS certificate verification style. More...
 
void mutt_date_normalize_time (struct tm *tm)
 Fix the contents of a struct tm. More...
 
time_t mutt_date_parse_date (const char *s, struct Tz *tz_out)
 Parse a date string in RFC822 format. More...
 
time_t mutt_date_parse_imap (const char *s)
 Parse date of the form: DD-MMM-YYYY HH:MM:SS +ZZzz. More...
 
void mutt_date_sleep_ms (size_t ms)
 Sleep for milliseconds. More...
 

Detailed Description

Time and date handling routines.

Authors
  • Michael R. Elkins

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file date.h.

Macro Definition Documentation

◆ TIME_T_MAX

#define TIME_T_MAX   ((((time_t) 1 << (sizeof(time_t) * 8 - 2)) - 1) * 2 + 1)

Definition at line 33 of file date.h.

◆ TIME_T_MIN

#define TIME_T_MIN   (-TIME_T_MAX - 1)

Definition at line 34 of file date.h.

◆ TM_YEAR_MAX

#define TM_YEAR_MAX   (1970 + (((((TIME_T_MAX - 59) / 60) - 59) / 60) - 23) / 24 / 366)

Definition at line 35 of file date.h.

◆ TM_YEAR_MIN

#define TM_YEAR_MIN   (1970 - (TM_YEAR_MAX - 1970) - 1)

Definition at line 37 of file date.h.

◆ MUTT_DATE_NOW

#define MUTT_DATE_NOW   -9999

Constant representing the 'current time', see: mutt_date_gmtime(), mutt_date_localtime()

Definition at line 39 of file date.h.

Function Documentation

◆ mutt_date_add_timeout()

time_t mutt_date_add_timeout ( time_t  now,
time_t  timeout 
)

Safely add a timeout to a given time_t value.

Parameters
nowTime now
timeoutTimeout in seconds
Return values
numUnix time to timeout

This will truncate instead of overflowing.

Definition at line 625 of file date.c.

626 {
627  if (timeout < 0)
628  return now;
629 
630  if ((TIME_T_MAX - now) < timeout)
631  return TIME_T_MAX;
632 
633  return now + timeout;
634 }
#define TIME_T_MAX
Definition: date.h:33
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◆ mutt_date_check_month()

int mutt_date_check_month ( const char *  s)

Is the string a valid month name.

Parameters
sString to check
Return values
numIndex into Months array (0-based)
-1Error
Note
Only the first three characters are checked
The comparison is case insensitive

Definition at line 403 of file date.c.

404 {
405  for (int i = 0; i < mutt_array_size(Months); i++)
406  if (mutt_istr_startswith(s, Months[i]))
407  return i;
408 
409  return -1; /* error */
410 }
static const char *const Months[]
Months of the year (abbreviated)
Definition: date.c:55
#define mutt_array_size(x)
Definition: memory.h:33
size_t mutt_istr_startswith(const char *str, const char *prefix)
Check whether a string starts with a prefix, ignoring case.
Definition: string.c:177
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◆ mutt_date_epoch()

time_t mutt_date_epoch ( void  )

Return the number of seconds since the Unix epoch.

Return values
sThe number of s since the Unix epoch, or 0 on failure

Definition at line 416 of file date.c.

417 {
418  return mutt_date_epoch_ms() / 1000;
419 }
uint64_t mutt_date_epoch_ms(void)
Return the number of milliseconds since the Unix epoch.
Definition: date.c:425
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◆ mutt_date_epoch_ms()

uint64_t mutt_date_epoch_ms ( void  )

Return the number of milliseconds since the Unix epoch.

Return values
msThe number of ms since the Unix epoch, or 0 on failure

Definition at line 425 of file date.c.

426 {
427  struct timeval tv = { 0, 0 };
428  gettimeofday(&tv, NULL);
429  /* We assume that gettimeofday doesn't modify its first argument on failure.
430  * We also kind of assume that gettimeofday does not fail. */
431  return (uint64_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
432 }
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◆ mutt_date_gmtime()

struct tm mutt_date_gmtime ( time_t  t)

Converts calendar time to a broken-down time structure expressed in UTC timezone.

Parameters
tTime
Return values
objBroken-down time representation

Uses current time if t is MUTT_DATE_NOW

Definition at line 661 of file date.c.

662 {
663  struct tm tm = { 0 };
664 
665  if (t == MUTT_DATE_NOW)
666  t = mutt_date_epoch();
667 
668  gmtime_r(&t, &tm);
669  return tm;
670 }
time_t mutt_date_epoch(void)
Return the number of seconds since the Unix epoch.
Definition: date.c:416
#define MUTT_DATE_NOW
Constant representing the &#39;current time&#39;, see: mutt_date_gmtime(), mutt_date_localtime() ...
Definition: date.h:39
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◆ mutt_date_localtime_format()

size_t mutt_date_localtime_format ( char *  buf,
size_t  buflen,
const char *  format,
time_t  t 
)

Format localtime.

Parameters
bufBuffer to store formatted time
buflenBuffer size
formatFormat to apply
tTime to format
Return values
numNumber of Bytes added to buffer, excluding null byte.

Definition at line 680 of file date.c.

681 {
682  if (!buf || !format)
683  return 0;
684 
685  struct tm tm = mutt_date_localtime(t);
686  return strftime(buf, buflen, format, &tm);
687 }
struct tm mutt_date_localtime(time_t t)
Converts calendar time to a broken-down time structure expressed in user timezone.
Definition: date.c:643
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◆ mutt_date_localtime()

struct tm mutt_date_localtime ( time_t  t)

Converts calendar time to a broken-down time structure expressed in user timezone.

Parameters
tTime
Return values
objBroken-down time representation

Uses current time if t is MUTT_DATE_NOW

Definition at line 643 of file date.c.

644 {
645  struct tm tm = { 0 };
646 
647  if (t == MUTT_DATE_NOW)
648  t = mutt_date_epoch();
649 
650  localtime_r(&t, &tm);
651  return tm;
652 }
time_t mutt_date_epoch(void)
Return the number of seconds since the Unix epoch.
Definition: date.c:416
#define MUTT_DATE_NOW
Constant representing the &#39;current time&#39;, see: mutt_date_gmtime(), mutt_date_localtime() ...
Definition: date.h:39
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◆ mutt_date_local_tz()

time_t mutt_date_local_tz ( time_t  t)

Calculate the local timezone in seconds east of UTC.

Parameters
tTime to examine
Return values
numSeconds east of UTC

Returns the local timezone in seconds east of UTC for the time t, or for the current time if t is zero.

Definition at line 206 of file date.c.

207 {
208  /* Check we haven't overflowed the time (on 32-bit arches) */
209  if ((t == TIME_T_MAX) || (t == TIME_T_MIN))
210  return 0;
211 
212  if (t == 0)
213  t = mutt_date_epoch();
214 
215  struct tm tm = mutt_date_gmtime(t);
216  return compute_tz(t, &tm);
217 }
time_t mutt_date_epoch(void)
Return the number of seconds since the Unix epoch.
Definition: date.c:416
#define TIME_T_MIN
Definition: date.h:34
#define TIME_T_MAX
Definition: date.h:33
struct tm mutt_date_gmtime(time_t t)
Converts calendar time to a broken-down time structure expressed in UTC timezone. ...
Definition: date.c:661
static time_t compute_tz(time_t g, struct tm *utc)
Calculate the number of seconds east of UTC.
Definition: date.c:127
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◆ mutt_date_make_date()

void mutt_date_make_date ( struct Buffer buf)

Write a date in RFC822 format to a buffer.

Parameters
bufBuffer for result

Appends the date to the passed in buffer. The buffer is not cleared because some callers prepend quotes.

Definition at line 377 of file date.c.

378 {
379  if (!buf)
380  return;
381 
382  time_t t = mutt_date_epoch();
383  struct tm tm = mutt_date_localtime(t);
384  time_t tz = mutt_date_local_tz(t);
385 
386  tz /= 60;
387 
388  mutt_buffer_add_printf(buf, "%s, %d %s %d %02d:%02d:%02d %+03d%02d",
389  Weekdays[tm.tm_wday], tm.tm_mday, Months[tm.tm_mon],
390  tm.tm_year + 1900, tm.tm_hour, tm.tm_min, tm.tm_sec,
391  (int) tz / 60, (int) abs((int) tz) % 60);
392 }
time_t mutt_date_epoch(void)
Return the number of seconds since the Unix epoch.
Definition: date.c:416
struct tm mutt_date_localtime(time_t t)
Converts calendar time to a broken-down time structure expressed in user timezone.
Definition: date.c:643
static const char *const Months[]
Months of the year (abbreviated)
Definition: date.c:55
time_t mutt_date_local_tz(time_t t)
Calculate the local timezone in seconds east of UTC.
Definition: date.c:206
int mutt_buffer_add_printf(struct Buffer *buf, const char *fmt,...)
Format a string appending a Buffer.
Definition: buffer.c:203
static const char *const Weekdays[]
Day of the week (abbreviated)
Definition: date.c:48
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◆ mutt_date_make_imap()

int mutt_date_make_imap ( char *  buf,
size_t  buflen,
time_t  timestamp 
)

Format date in IMAP style: DD-MMM-YYYY HH:MM:SS +ZZzz.

Parameters
bufBuffer to store the results
buflenLength of buffer
timestampTime to format
Return values
numCharacters written to buf

Caller should provide a buffer of at least 27 bytes.

Definition at line 546 of file date.c.

547 {
548  if (!buf)
549  return -1;
550 
551  struct tm tm = mutt_date_localtime(timestamp);
552  time_t tz = mutt_date_local_tz(timestamp);
553 
554  tz /= 60;
555 
556  return snprintf(buf, buflen, "%02d-%s-%d %02d:%02d:%02d %+03d%02d",
557  tm.tm_mday, Months[tm.tm_mon], tm.tm_year + 1900, tm.tm_hour,
558  tm.tm_min, tm.tm_sec, (int) tz / 60, (int) abs((int) tz) % 60);
559 }
struct tm mutt_date_localtime(time_t t)
Converts calendar time to a broken-down time structure expressed in user timezone.
Definition: date.c:643
static const char *const Months[]
Months of the year (abbreviated)
Definition: date.c:55
static const char * timestamp(time_t stamp)
Create a YYYY-MM-DD HH:MM:SS timestamp.
Definition: logging.c:77
time_t mutt_date_local_tz(time_t t)
Calculate the local timezone in seconds east of UTC.
Definition: date.c:206
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◆ mutt_date_make_time()

time_t mutt_date_make_time ( struct tm *  t,
bool  local 
)

Convert struct tm to time_t

Parameters
tTime to convert
localShould the local timezone be considered
Return values
numTime in Unix format
TIME_T_MINError

Convert a struct tm to time_t, but don't take the local timezone into account unless "local" is nonzero

Definition at line 229 of file date.c.

230 {
231  if (!t)
232  return TIME_T_MIN;
233 
234  static const int AccumDaysPerMonth[mutt_array_size(Months)] = {
235  0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334,
236  };
237 
238  /* Prevent an integer overflow, with some arbitrary limits. */
239  if (t->tm_year > 10000)
240  return TIME_T_MAX;
241  if (t->tm_year < -10000)
242  return TIME_T_MIN;
243 
244  if ((t->tm_mday < 1) || (t->tm_mday > 31))
245  return TIME_T_MIN;
246  if ((t->tm_hour < 0) || (t->tm_hour > 23) || (t->tm_min < 0) ||
247  (t->tm_min > 59) || (t->tm_sec < 0) || (t->tm_sec > 60))
248  {
249  return TIME_T_MIN;
250  }
251  if (t->tm_year > 9999)
252  return TIME_T_MAX;
253 
254  /* Compute the number of days since January 1 in the same year */
255  time_t g = AccumDaysPerMonth[t->tm_mon % mutt_array_size(Months)];
256 
257  /* The leap years are 1972 and every 4. year until 2096,
258  * but this algorithm will fail after year 2099 */
259  g += t->tm_mday;
260  if ((t->tm_year % 4) || (t->tm_mon < 2))
261  g--;
262  t->tm_yday = g;
263 
264  /* Compute the number of days since January 1, 1970 */
265  g += (t->tm_year - 70) * (time_t) 365;
266  g += (t->tm_year - 69) / 4;
267 
268  /* Compute the number of hours */
269  g *= 24;
270  g += t->tm_hour;
271 
272  /* Compute the number of minutes */
273  g *= 60;
274  g += t->tm_min;
275 
276  /* Compute the number of seconds */
277  g *= 60;
278  g += t->tm_sec;
279 
280  if (local)
281  g -= compute_tz(g, t);
282 
283  return g;
284 }
#define TIME_T_MIN
Definition: date.h:34
#define TIME_T_MAX
Definition: date.h:33
static const char *const Months[]
Months of the year (abbreviated)
Definition: date.c:55
#define mutt_array_size(x)
Definition: memory.h:33
static time_t compute_tz(time_t g, struct tm *utc)
Calculate the number of seconds east of UTC.
Definition: date.c:127
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◆ mutt_date_make_tls()

int mutt_date_make_tls ( char *  buf,
size_t  buflen,
time_t  timestamp 
)

Format date in TLS certificate verification style.

Parameters
bufBuffer to store the results
buflenLength of buffer
timestampTime to format
Return values
numCharacters written to buf

e.g., Mar 17 16:40:46 2016 UTC. The time is always in UTC.

Caller should provide a buffer of at least 27 bytes.

Definition at line 572 of file date.c.

573 {
574  if (!buf)
575  return -1;
576 
577  struct tm tm = mutt_date_gmtime(timestamp);
578  return snprintf(buf, buflen, "%s, %d %s %d %02d:%02d:%02d UTC",
579  Weekdays[tm.tm_wday], tm.tm_mday, Months[tm.tm_mon],
580  tm.tm_year + 1900, tm.tm_hour, tm.tm_min, tm.tm_sec);
581 }
static const char *const Months[]
Months of the year (abbreviated)
Definition: date.c:55
static const char * timestamp(time_t stamp)
Create a YYYY-MM-DD HH:MM:SS timestamp.
Definition: logging.c:77
struct tm mutt_date_gmtime(time_t t)
Converts calendar time to a broken-down time structure expressed in UTC timezone. ...
Definition: date.c:661
static const char *const Weekdays[]
Day of the week (abbreviated)
Definition: date.c:48
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◆ mutt_date_normalize_time()

void mutt_date_normalize_time ( struct tm *  tm)

Fix the contents of a struct tm.

Parameters
tmTime to correct

If values have been added/subtracted from a struct tm, it can lead to invalid dates, e.g. Adding 10 days to the 25th of a month.

This function will correct any over/under-flow.

Definition at line 295 of file date.c.

296 {
297  if (!tm)
298  return;
299 
300  static const char DaysPerMonth[mutt_array_size(Months)] = {
301  31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
302  };
303  int leap;
304 
305  while (tm->tm_sec < 0)
306  {
307  tm->tm_sec += 60;
308  tm->tm_min--;
309  }
310  while (tm->tm_sec >= 60)
311  {
312  tm->tm_sec -= 60;
313  tm->tm_min++;
314  }
315  while (tm->tm_min < 0)
316  {
317  tm->tm_min += 60;
318  tm->tm_hour--;
319  }
320  while (tm->tm_min >= 60)
321  {
322  tm->tm_min -= 60;
323  tm->tm_hour++;
324  }
325  while (tm->tm_hour < 0)
326  {
327  tm->tm_hour += 24;
328  tm->tm_mday--;
329  }
330  while (tm->tm_hour >= 24)
331  {
332  tm->tm_hour -= 24;
333  tm->tm_mday++;
334  }
335  /* use loops on NNNdwmy user input values? */
336  while (tm->tm_mon < 0)
337  {
338  tm->tm_mon += 12;
339  tm->tm_year--;
340  }
341  while (tm->tm_mon >= 12)
342  {
343  tm->tm_mon -= 12;
344  tm->tm_year++;
345  }
346  while (tm->tm_mday <= 0)
347  {
348  if (tm->tm_mon)
349  tm->tm_mon--;
350  else
351  {
352  tm->tm_mon = 11;
353  tm->tm_year--;
354  }
355  tm->tm_mday += DaysPerMonth[tm->tm_mon] + is_leap_year_feb(tm);
356  }
357  while (tm->tm_mday > (DaysPerMonth[tm->tm_mon] + (leap = is_leap_year_feb(tm))))
358  {
359  tm->tm_mday -= DaysPerMonth[tm->tm_mon] + leap;
360  if (tm->tm_mon < 11)
361  tm->tm_mon++;
362  else
363  {
364  tm->tm_mon = 0;
365  tm->tm_year++;
366  }
367  }
368 }
static const char *const Months[]
Months of the year (abbreviated)
Definition: date.c:55
static int is_leap_year_feb(struct tm *tm)
Is a given February in a leap year.
Definition: date.c:189
#define mutt_array_size(x)
Definition: memory.h:33
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◆ mutt_date_parse_date()

time_t mutt_date_parse_date ( const char *  s,
struct Tz tz_out 
)

Parse a date string in RFC822 format.

Parameters
[in]sString to parse
[out]tz_outPointer to timezone (optional)
Return values
numUnix time in seconds

Parse a date of the form: [ weekday , ] day-of-month month year hour:minute:second [ timezone ]

The 'timezone' field is optional; it defaults to +0000 if missing.

Definition at line 445 of file date.c.

446 {
447  if (!s)
448  return -1;
449 
450  bool lax = false;
451 
452  const regmatch_t *match = mutt_prex_capture(PREX_RFC5322_DATE, s);
453  if (!match)
454  {
456  if (!match)
457  {
458  mutt_debug(LL_DEBUG1, "Could not parse date: <%s>\n", s);
459  return -1;
460  }
461  lax = true;
462  mutt_debug(LL_DEBUG2, "Fallback regex for date: <%s>\n", s);
463  }
464 
465  struct tm tm = { 0 };
466 
467  // clang-format off
468  const regmatch_t *mday = &match[lax ? PREX_RFC5322_DATE_LAX_MATCH_DAY : PREX_RFC5322_DATE_MATCH_DAY];
469  const regmatch_t *mmonth = &match[lax ? PREX_RFC5322_DATE_LAX_MATCH_MONTH : PREX_RFC5322_DATE_MATCH_MONTH];
470  const regmatch_t *myear = &match[lax ? PREX_RFC5322_DATE_LAX_MATCH_YEAR : PREX_RFC5322_DATE_MATCH_YEAR];
471  const regmatch_t *mhour = &match[lax ? PREX_RFC5322_DATE_LAX_MATCH_HOUR : PREX_RFC5322_DATE_MATCH_HOUR];
472  const regmatch_t *mminute = &match[lax ? PREX_RFC5322_DATE_LAX_MATCH_MINUTE : PREX_RFC5322_DATE_MATCH_MINUTE];
473  const regmatch_t *msecond = &match[lax ? PREX_RFC5322_DATE_LAX_MATCH_SECOND : PREX_RFC5322_DATE_MATCH_SECOND];
474  const regmatch_t *mtz = &match[lax ? PREX_RFC5322_DATE_LAX_MATCH_TZ : PREX_RFC5322_DATE_MATCH_TZ];
475  const regmatch_t *mtzobs = &match[lax ? PREX_RFC5322_DATE_LAX_MATCH_TZ_OBS : PREX_RFC5322_DATE_MATCH_TZ_OBS];
476  // clang-format on
477 
478  /* Day */
479  sscanf(s + mutt_regmatch_start(mday), "%d", &tm.tm_mday);
480  if (tm.tm_mday > 31)
481  return -1;
482 
483  /* Month */
484  tm.tm_mon = mutt_date_check_month(s + mutt_regmatch_start(mmonth));
485 
486  /* Year */
487  sscanf(s + mutt_regmatch_start(myear), "%d", &tm.tm_year);
488  if (tm.tm_year < 50)
489  tm.tm_year += 100;
490  else if (tm.tm_year >= 1900)
491  tm.tm_year -= 1900;
492 
493  /* Time */
494  int hour, min, sec = 0;
495  sscanf(s + mutt_regmatch_start(mhour), "%d", &hour);
496  sscanf(s + mutt_regmatch_start(mminute), "%d", &min);
497  if (mutt_regmatch_start(msecond) != -1)
498  sscanf(s + mutt_regmatch_start(msecond), "%d", &sec);
499  if ((hour > 23) || (min > 59) || (sec > 60))
500  return -1;
501  tm.tm_hour = hour;
502  tm.tm_min = min;
503  tm.tm_sec = sec;
504 
505  /* Time zone */
506  int zhours = 0;
507  int zminutes = 0;
508  bool zoccident = false;
509  if (mutt_regmatch_start(mtz) != -1)
510  {
511  char direction;
512  sscanf(s + mutt_regmatch_start(mtz), "%c%02d%02d", &direction, &zhours, &zminutes);
513  zoccident = (direction == '-');
514  }
515  else if (mutt_regmatch_start(mtzobs) != -1)
516  {
517  const struct Tz *tz =
518  find_tz(s + mutt_regmatch_start(mtzobs), mutt_regmatch_len(mtzobs));
519  if (tz)
520  {
521  zhours = tz->zhours;
522  zminutes = tz->zminutes;
523  zoccident = tz->zoccident;
524  }
525  }
526 
527  if (tz_out)
528  {
529  tz_out->zhours = zhours;
530  tz_out->zminutes = zminutes;
531  tz_out->zoccident = zoccident;
532  }
533 
534  return add_tz_offset(mutt_date_make_time(&tm, false), zoccident, zhours, zminutes);
535 }
Tue, 3 Mar [2020] 14:32:55 +0200
Definition: prex.h:127
Tue, [3] Mar 2020 14:32:55 +0200
Definition: prex.h:125
Tue, 3 Mar 2020 14:32:55[UT]
Definition: prex.h:172
Tue, 3 Mar 2020 14:32:[55] +0200
Definition: prex.h:168
static size_t mutt_regmatch_len(const regmatch_t *match)
Return the length of a match.
Definition: regex3.h:80
Tue, [3] Mar 2020 14:32:55 +0200
Definition: prex.h:156
Tue, 3 Mar 2020 14:[32]:55 +0200
Definition: prex.h:129
Tue, 3 Mar [2020] 14:32:55 +0200
Definition: prex.h:160
unsigned char zhours
Hours away from UTC.
Definition: date.h:47
Tue, 3 Mar 2020 14:32:55 [+0200]
Definition: prex.h:133
Tue, 3 [Jan] 2020 14:32:55 +0200
Definition: prex.h:126
Log at debug level 2.
Definition: logging.h:41
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Definition: prex.h:164
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Definition: prex.h:38
bool zoccident
True if west of UTC, False if East.
Definition: date.h:49
Tue, 3 Mar 2020 14:32:55 [+0200]
Definition: prex.h:171
Tue, 3 Mar 2020 [14]:32:55 +0200
Definition: prex.h:128
regmatch_t * mutt_prex_capture(enum Prex which, const char *str)
match a precompiled regex against a string
Definition: prex.c:306
static const struct Tz * find_tz(const char *s, size_t len)
Look up a timezone.
Definition: date.c:174
static time_t add_tz_offset(time_t t, bool w, time_t h, time_t m)
Compute and add a timezone offset to an UTC time.
Definition: date.c:159
static regoff_t mutt_regmatch_start(const regmatch_t *match)
Return the start of a match.
Definition: regex3.h:60
Tue, 3 [Jan] 2020 14:32:55 +0200
Definition: prex.h:158
[Mon, 16 Mar 2020 15:09:35 -0700]
Definition: prex.h:37
unsigned char zminutes
Minutes away from UTC.
Definition: date.h:48
List of recognised Timezones.
Definition: date.h:44
Log at debug level 1.
Definition: logging.h:40
Tue, 3 Mar 2020 14:32:[55] +0200
Definition: prex.h:131
int mutt_date_check_month(const char *s)
Is the string a valid month name.
Definition: date.c:403
#define mutt_debug(LEVEL,...)
Definition: logging.h:81
time_t mutt_date_make_time(struct tm *t, bool local)
Convert struct tm to time_t
Definition: date.c:229
Tue, 3 Mar 2020 [14]:32:55 +0200
Definition: prex.h:162
Tue, 3 Mar 2020 14:32:55[UT]
Definition: prex.h:134
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◆ mutt_date_parse_imap()

time_t mutt_date_parse_imap ( const char *  s)

Parse date of the form: DD-MMM-YYYY HH:MM:SS +ZZzz.

Parameters
sDate in string form
Return values
numUnix time
0Error

Definition at line 589 of file date.c.

590 {
591  const regmatch_t *match = mutt_prex_capture(PREX_IMAP_DATE, s);
592  if (!match)
593  return 0;
594 
595  const regmatch_t *mday = &match[PREX_IMAP_DATE_MATCH_DAY];
596  const regmatch_t *mmonth = &match[PREX_IMAP_DATE_MATCH_MONTH];
597  const regmatch_t *myear = &match[PREX_IMAP_DATE_MATCH_YEAR];
598  const regmatch_t *mtime = &match[PREX_IMAP_DATE_MATCH_TIME];
599  const regmatch_t *mtz = &match[PREX_IMAP_DATE_MATCH_TZ];
600 
601  struct tm tm;
602 
603  sscanf(s + mutt_regmatch_start(mday), " %d", &tm.tm_mday);
604  tm.tm_mon = mutt_date_check_month(s + mutt_regmatch_start(mmonth));
605  sscanf(s + mutt_regmatch_start(myear), "%d", &tm.tm_year);
606  tm.tm_year -= 1900;
607  sscanf(s + mutt_regmatch_start(mtime), "%d:%d:%d", &tm.tm_hour, &tm.tm_min, &tm.tm_sec);
608 
609  char direction;
610  int zhours, zminutes;
611  sscanf(s + mutt_regmatch_start(mtz), "%c%02d%02d", &direction, &zhours, &zminutes);
612  bool zoccident = (direction == '-');
613 
614  return add_tz_offset(mutt_date_make_time(&tm, false), zoccident, zhours, zminutes);
615 }
[16-MAR-2020 15:09:35 -0700]
Definition: prex.h:39
15-MAR-2020 15:09:35 [-0700]
Definition: prex.h:190
15-MAR-2020 [15:09:35] -0700
Definition: prex.h:189
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Definition: prex.h:188
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Definition: prex.h:184
regmatch_t * mutt_prex_capture(enum Prex which, const char *str)
match a precompiled regex against a string
Definition: prex.c:306
static time_t add_tz_offset(time_t t, bool w, time_t h, time_t m)
Compute and add a timezone offset to an UTC time.
Definition: date.c:159
static regoff_t mutt_regmatch_start(const regmatch_t *match)
Return the start of a match.
Definition: regex3.h:60
15-[MAR]-2020 15:09:35 -0700
Definition: prex.h:187
int mutt_date_check_month(const char *s)
Is the string a valid month name.
Definition: date.c:403
time_t mutt_date_make_time(struct tm *t, bool local)
Convert struct tm to time_t
Definition: date.c:229
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◆ mutt_date_sleep_ms()

void mutt_date_sleep_ms ( size_t  ms)

Sleep for milliseconds.

Parameters
msNumber of milliseconds to sleep

Definition at line 693 of file date.c.

694 {
695  const struct timespec sleep = {
696  .tv_sec = ms / 1000,
697  .tv_nsec = (ms % 1000) * 1000000UL,
698  };
699  nanosleep(&sleep, NULL);
700 }
time_t tv_sec
Definition: file.h:48
Time value with nanosecond precision.
Definition: file.h:46
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