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-rw-r--r--calendar/cal-util/timeutil.c560
1 files changed, 0 insertions, 560 deletions
diff --git a/calendar/cal-util/timeutil.c b/calendar/cal-util/timeutil.c
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index a509bd3cba..0000000000
--- a/calendar/cal-util/timeutil.c
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-/* Miscellaneous time-related utilities
- *
- * Copyright (C) 1998 The Free Software Foundation
- *
- * Authors: Federico Mena <federico@nuclecu.unam.mx>
- * Miguel de Icaza <miguel@nuclecu.unam.mx>
- */
-
-#include <libgnome/libgnome.h>
-#include <string.h>
-#include "timeutil.h"
-
-
-
-#define digit_at(x,y) (x [y] - '0')
-
-time_t
-time_from_isodate (char *str)
-{
- struct tm my_tm;
- time_t t;
-
- if (strlen (str) < 14)
- return -1;
-
- my_tm.tm_year = (digit_at (str, 0) * 1000 + digit_at (str, 1) * 100 +
- digit_at (str, 2) * 10 + digit_at (str, 3)) - 1900;
-
- my_tm.tm_mon = digit_at (str, 4) * 10 + digit_at (str, 5) - 1;
- my_tm.tm_mday = digit_at (str, 6) * 10 + digit_at (str, 7);
- my_tm.tm_hour = digit_at (str, 9) * 10 + digit_at (str, 10);
- my_tm.tm_min = digit_at (str, 11) * 10 + digit_at (str, 12);
- my_tm.tm_sec = digit_at (str, 13) * 10 + digit_at (str, 14);
- my_tm.tm_isdst = -1;
-
- t = mktime (&my_tm);
-
- if (str [15] == 'Z')
-#if defined(HAVE_TM_GMTOFF)
- t -= my_tm.tm_gmtoff
-#elsif defined(HAVE_TIMEZONE)
- t -= timezone
-#endif
- ;
-
- return t;
-}
-
-void
-print_time_t (time_t t)
-{
- struct tm *tm = localtime (&t);
-
- printf ("TIEMPO: %d/%d/%d %d:%d:%d\n",
- tm->tm_mon+1, tm->tm_mday, tm->tm_year,
- tm->tm_hour, tm->tm_min, tm->tm_sec);
-}
-
-int
-get_time_t_hour (time_t t)
-{
- struct tm *tm;
-
- tm = localtime (&t);
- return tm->tm_hour;
-}
-
-char *
-isodate_from_time_t (time_t t)
-{
- struct tm *tm;
- static char isotime [40];
-
- tm = localtime (&t);
- strftime (isotime, sizeof (isotime)-1, "%Y%m%dT%H%M%S", tm);
- return isotime;
-}
-
-time_t
-time_from_start_duration (time_t start, char *duration)
-{
- printf ("Not yet implemented\n");
- return 0;
-}
-
-char *
-format_simple_hour (int hour, int use_am_pm)
-{
- static char buf[256];
-
- /* I don't know whether this is the best way to internationalize it.
- * Does any language use different conventions? - Federico
- */
-
- if (use_am_pm)
- g_snprintf (buf, sizeof(buf), "%d%s",
- (hour == 0) ? 12 : (hour > 12) ? (hour - 12) : hour,
- (hour < 12) ? _("am") : _("pm"));
- else
- g_snprintf (buf, sizeof(buf), "%02d%s", hour, _("h"));
-
- return buf;
-
-}
-
-time_t
-time_add_minutes (time_t time, int minutes)
-{
- struct tm *tm = localtime (&time);
- time_t new_time;
-
- tm->tm_min += minutes;
- if ((new_time = mktime (tm)) == -1){
- g_message ("time_add_minutes(): mktime() could not handle "
- "adding %d minutes with\n", minutes);
- print_time_t (time);
- return time;
- }
- return new_time;
-}
-
-/* Adds a day onto the time, using local time.
- Note that if clocks go forward due to daylight savings time, there are
- some non-existent local times, so the hour may be changed to make it a
- valid time. This also means that it may not be wise to keep calling
- time_add_day() to step through a certain period - if the hour gets changed
- to make it valid time, any further calls to time_add_day() will also return
- this hour, which may not be what you want. */
-time_t
-time_add_day (time_t time, int days)
-{
- struct tm *tm = localtime (&time);
- time_t new_time;
-#if 0
- int dst_flag = tm->tm_isdst;
-#endif
-
- tm->tm_mday += days;
- tm->tm_isdst = -1;
-
- if ((new_time = mktime (tm)) == -1){
- g_message ("time_add_day(): mktime() could not handling adding %d days with\n",
- days);
- print_time_t (time);
- return time;
- }
-
-#if 0
- /* I don't know what this is for. See also time_day_begin() and
- time_day_end(). - Damon. */
- if (dst_flag > tm->tm_isdst){
- tm->tm_hour++;
- new_time += 3600;
- } else if (dst_flag < tm->tm_isdst){
- tm->tm_hour--;
- new_time -= 3600;
- }
-#endif
-
- return new_time;
-}
-
-time_t
-time_add_week (time_t time, int weeks)
-{
- return time_add_day (time, weeks * 7);
-}
-
-time_t
-time_add_month (time_t time, int months)
-{
- struct tm *tm = localtime (&time);
- time_t new_time;
- int mday;
-
- mday = tm->tm_mday;
-
- tm->tm_mon += months;
- tm->tm_isdst = -1;
- if ((new_time = mktime (tm)) == -1){
- g_message ("time_add_month(): mktime() could not handling adding %d months with\n",
- months);
- print_time_t (time);
- return time;
- }
- tm = localtime (&new_time);
- if (tm->tm_mday < mday){
- tm->tm_mon--;
- tm->tm_mday = time_days_in_month (tm->tm_year+1900, tm->tm_mon);
- return new_time = mktime (tm);
- }
- else
- return new_time;
-}
-
-time_t
-time_add_year (time_t time, int years)
-{
- struct tm *tm = localtime (&time);
- time_t new_time;
-
- tm->tm_year += years;
- if ((new_time = mktime (tm)) == -1){
- g_message ("time_add_year(): mktime() could not handling adding %d years with\n",
- years);
- print_time_t (time);
- return time;
- }
- return new_time;
-}
-
-time_t
-time_day_hour (time_t t, int hour)
-{
- struct tm tm;
-
- tm = *localtime (&t);
- tm.tm_hour = hour;
- tm.tm_min = 0;
- tm.tm_sec = 0;
-
- return mktime (&tm);
-}
-
-/* Number of days in a month, for normal and leap years */
-static const int days_in_month[2][12] = {
- { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
- { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
-};
-
-/* Returns whether the specified year is a leap year */
-static int
-is_leap_year (int year)
-{
- if (year <= 1752)
- return !(year % 4);
- else
- return (!(year % 4) && (year % 100)) || !(year % 400);
-}
-
-int
-time_days_in_month (int year, int month)
-{
- g_return_val_if_fail (year >= 1900, 0);
- g_return_val_if_fail ((month >= 0) && (month < 12), 0);
-
- return days_in_month [is_leap_year (year)][month];
-}
-
-time_t
-time_from_day (int year, int month, int day)
-{
- struct tm tm;
-
- memset (&tm, 0, sizeof (tm));
- tm.tm_year = year - 1900;
- tm.tm_mon = month;
- tm.tm_mday = day;
- tm.tm_isdst = -1;
-
- return mktime (&tm);
-}
-
-time_t
-time_year_begin (time_t t)
-{
- struct tm tm;
-
- tm = *localtime (&t);
- tm.tm_hour = 0;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_mon = 0;
- tm.tm_mday = 1;
- tm.tm_isdst = -1;
-
- return mktime (&tm);
-}
-
-time_t
-time_year_end (time_t t)
-{
- struct tm tm;
-
- tm = *localtime (&t);
- tm.tm_hour = 0;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_mon = 0;
- tm.tm_mday = 1;
- tm.tm_year++;
- tm.tm_isdst = -1;
-
- return mktime (&tm);
-}
-
-time_t
-time_month_begin (time_t t)
-{
- struct tm tm;
-
- tm = *localtime (&t);
- tm.tm_hour = 0;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_mday = 1;
- tm.tm_isdst = -1;
-
- return mktime (&tm);
-}
-
-time_t
-time_month_end (time_t t)
-{
- struct tm tm;
-
- tm = *localtime (&t);
- tm.tm_hour = 0;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_mday = 1;
- tm.tm_mon++;
- tm.tm_isdst = -1;
-
- return mktime (&tm);
-}
-
-time_t
-time_week_begin (time_t t)
-{
- struct tm tm;
-
- /* FIXME: make it take week_starts_on_monday into account */
-
- tm = *localtime (&t);
- tm.tm_hour = 0;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_mday -= tm.tm_wday;
- tm.tm_isdst = -1;
-
- return mktime (&tm);
-}
-
-time_t
-time_week_end (time_t t)
-{
- struct tm tm;
-
- /* FIXME: make it take week_starts_on_monday into account */
-
- tm = *localtime (&t);
- tm.tm_hour = 0;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_mday += 7 - tm.tm_wday;
- tm.tm_isdst = -1;
-
- return mktime (&tm);
-}
-
-/* Returns the start of the day, according to the local time. */
-time_t
-time_day_begin (time_t t)
-{
-#if 1
- struct tm tm;
-
- tm = *localtime (&t);
- tm.tm_hour = 0;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_isdst = -1;
-
- return mktime (&tm);
-
-#else
- /* This is the original code which sometimes produces a time of 1:00.
- I don't understand why it looked at the tm_isdst flags at all.
- - Damon. */
-
- struct tm tm;
- time_t temp = t - 43200;
- int dstflag, dstflag2;
-
- tm = *localtime(&temp); /* one day */
- dstflag = tm.tm_isdst;
-
- tm = *localtime (&t);
- dstflag2 = tm.tm_isdst;
-
- if (dstflag < dstflag2)
- tm.tm_hour = 1;
- else
- tm.tm_hour = 0;
-
- tm.tm_min = 0;
- tm.tm_sec = 0;
-
- temp = mktime(&tm);
- if (dstflag > dstflag2){
- temp += 3600;
- }
-
- return temp;
-#endif
-}
-
-/* Returns the end of the day, according to the local time. */
-time_t
-time_day_end (time_t t)
-{
-#if 1
- struct tm tm;
-
- tm = *localtime (&t);
- tm.tm_mday++;
- tm.tm_hour = 0;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_isdst = -1;
-
- return mktime (&tm);
-
-#else
- /* This is the original code which has more problems than
- time_day_begin(). - Damon. */
-
- struct tm tm;
- time_t temp;
- int dstflag, dstflag2;
-
- t += 10800;
- temp = t - 86400;
-
- tm = *localtime(&temp); /* one day */
- dstflag = tm.tm_isdst;
-
- tm = *localtime (&t);
- dstflag2 = tm.tm_isdst;
-
- if (dstflag < dstflag2)
- tm.tm_hour = 23;
- else {
- tm.tm_mday++;
- tm.tm_hour = 0;
- }
- tm.tm_min = 0;
- tm.tm_sec = 0;
-
- temp = mktime(&tm);
- if(dstflag > dstflag2) {
- }
- return temp;
-#endif
-}
-
-static char *
-pcat (char *dest, int num, char key)
-{
- int c;
-
- c = sprintf (dest, "%d%c", num, key);
- return dest + c;
-}
-
-/* Converts secs into the ISO difftime representation */
-char *
-isodiff_from_secs (int secs)
-{
- static char buffer [60], *p;
- int years, months, weeks, days, hours, minutes;
-
- years = months = weeks = days = hours = minutes = 0;
-
- years = secs / (365 * 86400);
- secs %= (365 * 86400);
- months = secs / (30 * 86400);
- secs %= (30 * 86400);
- weeks = secs / (7 * 86400);
- secs %= (7 * 86400);
- days = secs / 86400;
- secs %= 86400;
- hours = secs / 3600;
- secs %= 3600;
- minutes = secs / 60;
- secs %= 60;
-
- strcpy (buffer, "P");
- p = buffer + 1;
- if (years)
- p = pcat (p, years, 'Y');
- if (months)
- p = pcat (p, months, 'M');
- if (weeks)
- p = pcat (p, weeks, 'W');
- if (days)
- p = pcat (p, days, 'D');
- if (hours || minutes || secs){
- *p++ = 'T';
- if (hours)
- p = pcat (p, hours, 'H');
- if (minutes)
- p = pcat (p, minutes, 'M');
- if (secs)
- p = pcat (p, secs, 'S');
- }
-
- return buffer;
-}
-
-int
-isodiff_to_secs (char *str)
-{
- int value, time;
- int years, months, weeks, days, hours, minutes, seconds;
-
- value = years = months = weeks = days = hours = minutes = time = seconds = 0;
- if (*str != 'P')
- return 0;
-
- str++;
- while (*str){
- switch (*str){
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- value = value * 10 + (*str - '0');
- break;
- case 'Y':
- years = value; value = 0;
- break;
- case 'M':
- if (time)
- minutes = value;
- else
- months = value;
- value = 0;
- break;
- case 'W':
- weeks = value; value = 0;
- break;
- case 'D':
- days = value; value = 0;
- break;
- case 'T':
- value = 0; time = 1;
- break;
- case 'H':
- hours = value; value = 0;
- break;
- case 'S':
- seconds = value; value = 0;
- break;
- }
- str++;
- }
- return seconds + (minutes * 60) + (hours * 3600) +
- (days * 86400) + (weeks * 7 * 86400) +
- (months * 30 * 86400) + (years * 365 * 86400);
-}