1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
33 #define DEBUG_MSG(x) /* */
35 /* #define DEBUG_MSG(args) g_message args ; */
54 GDate *d = g_new0 (GDate, 1); /* happily, 0 is the invalid flag for everything. */
60 g_date_new_dmy (GDateDay day,
65 g_return_val_if_fail (g_date_valid_dmy (day, m, y), NULL);
76 g_assert (g_date_valid (d));
82 g_date_new_julian (guint32 j)
85 g_return_val_if_fail (g_date_valid_julian (j), NULL);
94 g_assert (g_date_valid (d));
100 g_date_free (GDate *d)
102 g_return_if_fail (d != NULL);
108 g_date_valid (const GDate *d)
110 g_return_val_if_fail (d != NULL, FALSE);
112 return (d->julian || d->dmy);
115 static const guint8 days_in_months[2][13] =
116 { /* error, jan feb mar apr may jun jul aug sep oct nov dec */
117 { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
118 { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } /* leap year */
121 static const guint16 days_in_year[2][14] =
122 { /* 0, jan feb mar apr may jun jul aug sep oct nov dec */
123 { 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
124 { 0, 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
128 g_date_valid_month (GDateMonth m)
130 return ( (m > G_DATE_BAD_MONTH) && (m < 13) );
134 g_date_valid_year (GDateYear y)
136 return ( y > G_DATE_BAD_YEAR );
140 g_date_valid_day (GDateDay d)
142 return ( (d > G_DATE_BAD_DAY) && (d < 32) );
146 g_date_valid_weekday (GDateWeekday w)
148 return ( (w > G_DATE_BAD_WEEKDAY) && (w < 8) );
152 g_date_valid_julian (guint32 j)
154 return (j > G_DATE_BAD_JULIAN);
158 g_date_valid_dmy (GDateDay d,
162 return ( (m > G_DATE_BAD_MONTH) &&
164 (d > G_DATE_BAD_DAY) &&
165 (y > G_DATE_BAD_YEAR) && /* must check before using g_date_is_leap_year */
166 (d <= (g_date_is_leap_year (y) ?
167 days_in_months[1][m] : days_in_months[0][m])) );
171 /* "Julian days" just means an absolute number of days, where Day 1 ==
175 g_date_update_julian (const GDate *const_d)
177 GDate *d = (GDate *) const_d;
181 g_return_if_fail (d != NULL);
182 g_return_if_fail (d->dmy);
183 g_return_if_fail (!d->julian);
184 g_return_if_fail (g_date_valid_dmy (d->day, d->month, d->year));
186 /* What we actually do is: multiply years * 365 days in the year,
187 * add the number of years divided by 4, subtract the number of
188 * years divided by 100 and add the number of years divided by 400,
189 * which accounts for leap year stuff. Code from Steffen Beyer's
193 year = d->year - 1; /* we know d->year > 0 since it's valid */
195 d->julian_days = year * 365U;
196 d->julian_days += (year >>= 2); /* divide by 4 and add */
197 d->julian_days -= (year /= 25); /* divides original # years by 100 */
198 d->julian_days += year >> 2; /* divides by 4, which divides original by 400 */
200 index = g_date_is_leap_year (d->year) ? 1 : 0;
202 d->julian_days += days_in_year[index][d->month] + d->day;
204 g_return_if_fail (g_date_valid_julian (d->julian_days));
210 g_date_update_dmy (const GDate *const_d)
212 GDate *d = (GDate *) const_d;
217 guint32 A, B, C, D, E, M;
219 g_return_if_fail (d != NULL);
220 g_return_if_fail (d->julian);
221 g_return_if_fail (!d->dmy);
222 g_return_if_fail (g_date_valid_julian (d->julian_days));
224 /* Formula taken from the Calendar FAQ; the formula was for the
225 * Julian Period which starts on 1 January 4713 BC, so we add
226 * 1,721,425 to the number of days before doing the formula.
228 * I'm sure this can be simplified for our 1 January 1 AD period
229 * start, but I can't figure out how to unpack the formula.
232 A = d->julian_days + 1721425 + 32045;
233 B = ( 4 *(A + 36524) )/ 146097 - 1;
234 C = A - (146097 * B)/4;
235 D = ( 4 * (C + 365) ) / 1461 - 1;
236 E = C - ((1461*D) / 4);
237 M = (5 * (E - 1) + 2)/153;
239 m = M + 3 - (12*(M/10));
240 day = E - (153*M + 2)/5;
241 y = 100 * B + D - 4800 + (M/10);
243 #ifdef G_ENABLE_DEBUG
244 if (!g_date_valid_dmy (day, m, y))
245 g_warning ("\nOOPS julian: %u computed dmy: %u %u %u\n",
246 d->julian_days, day, m, y);
257 g_date_get_weekday (const GDate *d)
259 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_WEEKDAY);
262 g_date_update_julian (d);
264 g_return_val_if_fail (d->julian, G_DATE_BAD_WEEKDAY);
266 return ((d->julian_days - 1) % 7) + 1;
270 g_date_get_month (const GDate *d)
272 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_MONTH);
275 g_date_update_dmy (d);
277 g_return_val_if_fail (d->dmy, G_DATE_BAD_MONTH);
283 g_date_get_year (const GDate *d)
285 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_YEAR);
288 g_date_update_dmy (d);
290 g_return_val_if_fail (d->dmy, G_DATE_BAD_YEAR);
296 g_date_get_day (const GDate *d)
298 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_DAY);
301 g_date_update_dmy (d);
303 g_return_val_if_fail (d->dmy, G_DATE_BAD_DAY);
309 g_date_get_julian (const GDate *d)
311 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_JULIAN);
314 g_date_update_julian (d);
316 g_return_val_if_fail (d->julian, G_DATE_BAD_JULIAN);
318 return d->julian_days;
322 g_date_get_day_of_year (const GDate *d)
326 g_return_val_if_fail (g_date_valid (d), 0);
329 g_date_update_dmy (d);
331 g_return_val_if_fail (d->dmy, 0);
333 index = g_date_is_leap_year (d->year) ? 1 : 0;
335 return (days_in_year[index][d->month] + d->day);
339 g_date_get_monday_week_of_year (const GDate *d)
345 g_return_val_if_fail (g_date_valid (d), 0);
348 g_date_update_dmy (d);
350 g_return_val_if_fail (d->dmy, 0);
352 g_date_clear (&first, 1);
354 g_date_set_dmy (&first, 1, 1, d->year);
356 wd = g_date_get_weekday (&first) - 1; /* make Monday day 0 */
357 day = g_date_get_day_of_year (d) - 1;
359 return ((day + wd)/7U + (wd == 0 ? 1 : 0));
363 g_date_get_sunday_week_of_year (const GDate *d)
369 g_return_val_if_fail (g_date_valid (d), 0);
372 g_date_update_dmy (d);
374 g_return_val_if_fail (d->dmy, 0);
376 g_date_clear (&first, 1);
378 g_date_set_dmy (&first, 1, 1, d->year);
380 wd = g_date_get_weekday (&first);
381 if (wd == 7) wd = 0; /* make Sunday day 0 */
382 day = g_date_get_day_of_year (d) - 1;
384 return ((day + wd)/7U + (wd == 0 ? 1 : 0));
388 * g_date_get_iso8601_week_of_year:
389 * @date: a valid #GDate
391 * Returns the week of the year, where weeks are interpreted according
394 * Returns: ISO 8601 week number of the year.
399 g_date_get_iso8601_week_of_year (const GDate *d)
401 guint j, d4, L, d1, w;
403 g_return_val_if_fail (g_date_valid (d), 0);
406 g_date_update_julian (d);
408 g_return_val_if_fail (d->julian, 0);
410 /* Formula taken from the Calendar FAQ; the formula was for the
411 * Julian Period which starts on 1 January 4713 BC, so we add
412 * 1,721,425 to the number of days before doing the formula.
414 j = d->julian_days + 1721425;
415 d4 = (j + 31741 - (j % 7)) % 146097 % 36524 % 1461;
417 d1 = ((d4 - L) % 365) + L;
424 g_date_days_between (const GDate *d1,
427 g_return_val_if_fail (g_date_valid (d1), 0);
428 g_return_val_if_fail (g_date_valid (d2), 0);
430 return (gint)g_date_get_julian (d2) - (gint)g_date_get_julian (d1);
434 g_date_clear (GDate *d, guint ndates)
436 g_return_if_fail (d != NULL);
437 g_return_if_fail (ndates != 0);
439 memset (d, 0x0, ndates*sizeof (GDate));
442 G_LOCK_DEFINE_STATIC (g_date_global);
444 /* These are for the parser, output to the user should use *
445 * g_date_strftime () - this creates more never-freed memory to annoy
446 * all those memory debugger users. :-)
449 static gchar *long_month_names[13] =
454 static gchar *short_month_names[13] =
459 /* This tells us if we need to update the parse info */
460 static gchar *current_locale = NULL;
462 /* order of these in the current locale */
463 static GDateDMY dmy_order[3] =
465 G_DATE_DAY, G_DATE_MONTH, G_DATE_YEAR
468 /* Where to chop two-digit years: i.e., for the 1930 default, numbers
469 * 29 and below are counted as in the year 2000, numbers 30 and above
470 * are counted as in the year 1900.
473 static const GDateYear twodigit_start_year = 1930;
475 /* It is impossible to enter a year between 1 AD and 99 AD with this
478 static gboolean using_twodigit_years = FALSE;
480 /* Adjustment of locale era to AD, non-zero means using locale era
482 static gint locale_era_adjust = 0;
484 struct _GDateParseTokens {
490 typedef struct _GDateParseTokens GDateParseTokens;
494 /* HOLDS: g_date_global_lock */
496 g_date_fill_parse_tokens (const gchar *str, GDateParseTokens *pt)
498 gchar num[4][NUM_LEN+1];
502 /* We count 4, but store 3; so we can give an error
505 num[0][0] = num[1][0] = num[2][0] = num[3][0] = '\0';
507 s = (const guchar *) str;
509 while (*s && pt->num_ints < 4)
513 while (*s && g_ascii_isdigit (*s) && i < NUM_LEN)
515 num[pt->num_ints][i] = *s;
522 num[pt->num_ints][i] = '\0';
526 if (*s == '\0') break;
531 pt->n[0] = pt->num_ints > 0 ? atoi (num[0]) : 0;
532 pt->n[1] = pt->num_ints > 1 ? atoi (num[1]) : 0;
533 pt->n[2] = pt->num_ints > 2 ? atoi (num[2]) : 0;
535 pt->month = G_DATE_BAD_MONTH;
537 if (pt->num_ints < 3)
542 casefold = g_utf8_casefold (str, -1);
543 normalized = g_utf8_normalize (casefold, -1, G_NORMALIZE_ALL);
549 if (long_month_names[i] != NULL)
551 const gchar *found = strstr (normalized, long_month_names[i]);
560 if (short_month_names[i] != NULL)
562 const gchar *found = strstr (normalized, short_month_names[i]);
578 /* HOLDS: g_date_global_lock */
580 g_date_prepare_to_parse (const gchar *str,
581 GDateParseTokens *pt)
583 const gchar *locale = setlocale (LC_TIME, NULL);
584 gboolean recompute_localeinfo = FALSE;
587 g_return_if_fail (locale != NULL); /* should not happen */
589 g_date_clear (&d, 1); /* clear for scratch use */
591 if ( (current_locale == NULL) || (strcmp (locale, current_locale) != 0) )
592 recompute_localeinfo = TRUE; /* Uh, there used to be a reason for the temporary */
594 if (recompute_localeinfo)
597 GDateParseTokens testpt;
600 g_free (current_locale); /* still works if current_locale == NULL */
602 current_locale = g_strdup (locale);
604 short_month_names[0] = "Error";
605 long_month_names[0] = "Error";
611 g_date_set_dmy (&d, 1, i, 1);
613 g_return_if_fail (g_date_valid (&d));
615 g_date_strftime (buf, 127, "%b", &d);
617 casefold = g_utf8_casefold (buf, -1);
618 g_free (short_month_names[i]);
619 short_month_names[i] = g_utf8_normalize (casefold, -1, G_NORMALIZE_ALL);
622 g_date_strftime (buf, 127, "%B", &d);
623 casefold = g_utf8_casefold (buf, -1);
624 g_free (long_month_names[i]);
625 long_month_names[i] = g_utf8_normalize (casefold, -1, G_NORMALIZE_ALL);
631 /* Determine DMY order */
633 /* had to pick a random day - don't change this, some strftimes
634 * are broken on some days, and this one is good so far. */
635 g_date_set_dmy (&d, 4, 7, 1976);
637 g_date_strftime (buf, 127, "%x", &d);
639 g_date_fill_parse_tokens (buf, &testpt);
642 while (i < testpt.num_ints)
647 dmy_order[i] = G_DATE_MONTH;
650 dmy_order[i] = G_DATE_DAY;
653 using_twodigit_years = TRUE; /* FALL THRU */
655 dmy_order[i] = G_DATE_YEAR;
658 /* assume locale era */
659 locale_era_adjust = 1976 - testpt.n[i];
660 dmy_order[i] = G_DATE_YEAR;
666 #ifdef G_ENABLE_DEBUG
667 DEBUG_MSG (("**GDate prepared a new set of locale-specific parse rules."));
671 DEBUG_MSG ((" %s %s", long_month_names[i], short_month_names[i]));
674 if (using_twodigit_years)
675 DEBUG_MSG (("**Using twodigit years with cutoff year: %u", twodigit_start_year));
681 switch (dmy_order[i])
684 strings[i] = "Month";
698 DEBUG_MSG (("**Order: %s, %s, %s", strings[0], strings[1], strings[2]));
699 DEBUG_MSG (("**Sample date in this locale: `%s'", buf));
704 g_date_fill_parse_tokens (str, pt);
708 g_date_set_parse (GDate *d,
712 guint m = G_DATE_BAD_MONTH, day = G_DATE_BAD_DAY, y = G_DATE_BAD_YEAR;
714 g_return_if_fail (d != NULL);
719 G_LOCK (g_date_global);
721 g_date_prepare_to_parse (str, &pt);
723 DEBUG_MSG (("Found %d ints, `%d' `%d' `%d' and written out month %d",
724 pt.num_ints, pt.n[0], pt.n[1], pt.n[2], pt.month));
727 if (pt.num_ints == 4)
729 G_UNLOCK (g_date_global);
730 return; /* presumably a typo; bail out. */
738 g_assert (pt.num_ints < 4); /* i.e., it is 2 or 3 */
740 while (i < pt.num_ints && j < 3)
742 switch (dmy_order[j])
746 if (pt.num_ints == 2 && pt.month != G_DATE_BAD_MONTH)
749 ++j; /* skip months, but don't skip this number */
758 if (pt.num_ints == 2 && pt.month == G_DATE_BAD_MONTH)
761 ++j; /* skip days, since we may have month/year */
771 if (locale_era_adjust != 0)
773 y += locale_era_adjust;
775 else if (using_twodigit_years && y < 100)
777 guint two = twodigit_start_year % 100;
778 guint century = (twodigit_start_year / 100) * 100;
796 if (pt.num_ints == 3 && !g_date_valid_dmy (day, m, y))
803 if (using_twodigit_years && y < 100)
804 y = G_DATE_BAD_YEAR; /* avoids ambiguity */
806 else if (pt.num_ints == 2)
808 if (m == G_DATE_BAD_MONTH && pt.month != G_DATE_BAD_MONTH)
812 else if (pt.num_ints == 1)
814 if (pt.month != G_DATE_BAD_MONTH)
816 /* Month name and year? */
823 /* Try yyyymmdd and yymmdd */
825 m = (pt.n[0]/100) % 100;
829 /* FIXME move this into a separate function */
830 if (using_twodigit_years && y < 100)
832 guint two = twodigit_start_year % 100;
833 guint century = (twodigit_start_year / 100) * 100;
843 /* See if we got anything valid out of all this. */
844 /* y < 8000 is to catch 19998 style typos; the library is OK up to 65535 or so */
845 if (y < 8000 && g_date_valid_dmy (day, m, y))
852 #ifdef G_ENABLE_DEBUG
854 DEBUG_MSG (("Rejected DMY %u %u %u", day, m, y));
856 G_UNLOCK (g_date_global);
862 * @timet: <type>time_t</type> value to set
864 * Sets the value of a date from a <type>time_t</type> value.
866 * To set the value of a date to the current day, you could write:
868 * g_date_set_time_t (date, time (NULL));
874 g_date_set_time_t (GDate *date,
879 g_return_if_fail (date != NULL);
881 #ifdef HAVE_LOCALTIME_R
882 localtime_r (&timet, &tm);
885 struct tm *ptm = localtime (&timet);
889 /* Happens at least in Microsoft's C library if you pass a
890 * negative time_t. Use 2000-01-01 as default date.
892 #ifndef G_DISABLE_CHECKS
893 g_return_if_fail_warning (G_LOG_DOMAIN, "g_date_set_time", "ptm != NULL");
901 memcpy ((void *) &tm, (void *) ptm, sizeof(struct tm));
905 date->julian = FALSE;
907 date->month = tm.tm_mon + 1;
908 date->day = tm.tm_mday;
909 date->year = tm.tm_year + 1900;
911 g_return_if_fail (g_date_valid_dmy (date->day, date->month, date->year));
920 * @time_: #GTime value to set.
922 * Sets the value of a date from a #GTime value.
924 * @Deprecated:2.10: Use g_date_set_time_t() instead.
927 g_date_set_time (GDate *date,
930 g_date_set_time_t (date, (time_t) time_);
934 * g_date_set_time_val:
936 * @timeval: #GTimeVal value to set
938 * Sets the value of a date from a #GTimeVal value. Note that the
939 * @tv_usec member is ignored, because #GDate can't make use of the
940 * additional precision.
945 g_date_set_time_val (GDate *date,
948 g_date_set_time_t (date, (time_t) timeval->tv_sec);
952 g_date_set_month (GDate *d,
955 g_return_if_fail (d != NULL);
956 g_return_if_fail (g_date_valid_month (m));
958 if (d->julian && !d->dmy) g_date_update_dmy(d);
963 if (g_date_valid_dmy (d->day, d->month, d->year))
970 g_date_set_day (GDate *d,
973 g_return_if_fail (d != NULL);
974 g_return_if_fail (g_date_valid_day (day));
976 if (d->julian && !d->dmy) g_date_update_dmy(d);
981 if (g_date_valid_dmy (d->day, d->month, d->year))
988 g_date_set_year (GDate *d,
991 g_return_if_fail (d != NULL);
992 g_return_if_fail (g_date_valid_year (y));
994 if (d->julian && !d->dmy) g_date_update_dmy(d);
999 if (g_date_valid_dmy (d->day, d->month, d->year))
1006 g_date_set_dmy (GDate *d,
1011 g_return_if_fail (d != NULL);
1012 g_return_if_fail (g_date_valid_dmy (day, m, y));
1024 g_date_set_julian (GDate *d,
1027 g_return_if_fail (d != NULL);
1028 g_return_if_fail (g_date_valid_julian (j));
1037 g_date_is_first_of_month (const GDate *d)
1039 g_return_val_if_fail (g_date_valid (d), FALSE);
1042 g_date_update_dmy (d);
1044 g_return_val_if_fail (d->dmy, FALSE);
1046 if (d->day == 1) return TRUE;
1051 g_date_is_last_of_month (const GDate *d)
1055 g_return_val_if_fail (g_date_valid (d), FALSE);
1058 g_date_update_dmy (d);
1060 g_return_val_if_fail (d->dmy, FALSE);
1062 index = g_date_is_leap_year (d->year) ? 1 : 0;
1064 if (d->day == days_in_months[index][d->month]) return TRUE;
1069 g_date_add_days (GDate *d,
1072 g_return_if_fail (g_date_valid (d));
1075 g_date_update_julian (d);
1077 g_return_if_fail (d->julian);
1079 d->julian_days += ndays;
1084 g_date_subtract_days (GDate *d,
1087 g_return_if_fail (g_date_valid (d));
1090 g_date_update_julian (d);
1092 g_return_if_fail (d->julian);
1093 g_return_if_fail (d->julian_days > ndays);
1095 d->julian_days -= ndays;
1100 g_date_add_months (GDate *d,
1103 guint years, months;
1106 g_return_if_fail (g_date_valid (d));
1109 g_date_update_dmy (d);
1111 g_return_if_fail (d->dmy);
1113 nmonths += d->month - 1;
1116 months = nmonths%12;
1118 d->month = months + 1;
1121 index = g_date_is_leap_year (d->year) ? 1 : 0;
1123 if (d->day > days_in_months[index][d->month])
1124 d->day = days_in_months[index][d->month];
1128 g_return_if_fail (g_date_valid (d));
1132 g_date_subtract_months (GDate *d,
1135 guint years, months;
1138 g_return_if_fail (g_date_valid (d));
1141 g_date_update_dmy (d);
1143 g_return_if_fail (d->dmy);
1146 months = nmonths%12;
1148 g_return_if_fail (d->year > years);
1152 if (d->month > months) d->month -= months;
1156 d->month = 12 - months;
1160 index = g_date_is_leap_year (d->year) ? 1 : 0;
1162 if (d->day > days_in_months[index][d->month])
1163 d->day = days_in_months[index][d->month];
1167 g_return_if_fail (g_date_valid (d));
1171 g_date_add_years (GDate *d,
1174 g_return_if_fail (g_date_valid (d));
1177 g_date_update_dmy (d);
1179 g_return_if_fail (d->dmy);
1183 if (d->month == 2 && d->day == 29)
1185 if (!g_date_is_leap_year (d->year))
1193 g_date_subtract_years (GDate *d,
1196 g_return_if_fail (g_date_valid (d));
1199 g_date_update_dmy (d);
1201 g_return_if_fail (d->dmy);
1202 g_return_if_fail (d->year > nyears);
1206 if (d->month == 2 && d->day == 29)
1208 if (!g_date_is_leap_year (d->year))
1216 g_date_is_leap_year (GDateYear year)
1218 g_return_val_if_fail (g_date_valid_year (year), FALSE);
1220 return ( (((year % 4) == 0) && ((year % 100) != 0)) ||
1221 (year % 400) == 0 );
1225 g_date_get_days_in_month (GDateMonth month,
1230 g_return_val_if_fail (g_date_valid_year (year), 0);
1231 g_return_val_if_fail (g_date_valid_month (month), 0);
1233 index = g_date_is_leap_year (year) ? 1 : 0;
1235 return days_in_months[index][month];
1239 g_date_get_monday_weeks_in_year (GDateYear year)
1243 g_return_val_if_fail (g_date_valid_year (year), 0);
1245 g_date_clear (&d, 1);
1246 g_date_set_dmy (&d, 1, 1, year);
1247 if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53;
1248 g_date_set_dmy (&d, 31, 12, year);
1249 if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53;
1250 if (g_date_is_leap_year (year))
1252 g_date_set_dmy (&d, 2, 1, year);
1253 if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53;
1254 g_date_set_dmy (&d, 30, 12, year);
1255 if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53;
1261 g_date_get_sunday_weeks_in_year (GDateYear year)
1265 g_return_val_if_fail (g_date_valid_year (year), 0);
1267 g_date_clear (&d, 1);
1268 g_date_set_dmy (&d, 1, 1, year);
1269 if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53;
1270 g_date_set_dmy (&d, 31, 12, year);
1271 if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53;
1272 if (g_date_is_leap_year (year))
1274 g_date_set_dmy (&d, 2, 1, year);
1275 if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53;
1276 g_date_set_dmy (&d, 30, 12, year);
1277 if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53;
1283 g_date_compare (const GDate *lhs,
1286 g_return_val_if_fail (lhs != NULL, 0);
1287 g_return_val_if_fail (rhs != NULL, 0);
1288 g_return_val_if_fail (g_date_valid (lhs), 0);
1289 g_return_val_if_fail (g_date_valid (rhs), 0);
1291 /* Remember the self-comparison case! I think it works right now. */
1295 if (lhs->julian && rhs->julian)
1297 if (lhs->julian_days < rhs->julian_days) return -1;
1298 else if (lhs->julian_days > rhs->julian_days) return 1;
1301 else if (lhs->dmy && rhs->dmy)
1303 if (lhs->year < rhs->year) return -1;
1304 else if (lhs->year > rhs->year) return 1;
1307 if (lhs->month < rhs->month) return -1;
1308 else if (lhs->month > rhs->month) return 1;
1311 if (lhs->day < rhs->day) return -1;
1312 else if (lhs->day > rhs->day) return 1;
1321 if (!lhs->julian) g_date_update_julian (lhs);
1322 if (!rhs->julian) g_date_update_julian (rhs);
1323 g_return_val_if_fail (lhs->julian, 0);
1324 g_return_val_if_fail (rhs->julian, 0);
1328 return 0; /* warnings */
1333 g_date_to_struct_tm (const GDate *d,
1338 g_return_if_fail (g_date_valid (d));
1339 g_return_if_fail (tm != NULL);
1342 g_date_update_dmy (d);
1344 g_return_if_fail (d->dmy);
1346 /* zero all the irrelevant fields to be sure they're valid */
1348 /* On Linux and maybe other systems, there are weird non-POSIX
1349 * fields on the end of struct tm that choke strftime if they
1350 * contain garbage. So we need to 0 the entire struct, not just the
1351 * fields we know to exist.
1354 memset (tm, 0x0, sizeof (struct tm));
1356 tm->tm_mday = d->day;
1357 tm->tm_mon = d->month - 1; /* 0-11 goes in tm */
1358 tm->tm_year = ((int)d->year) - 1900; /* X/Open says tm_year can be negative */
1360 day = g_date_get_weekday (d);
1361 if (day == 7) day = 0; /* struct tm wants days since Sunday, so Sunday is 0 */
1363 tm->tm_wday = (int)day;
1365 tm->tm_yday = g_date_get_day_of_year (d) - 1; /* 0 to 365 */
1366 tm->tm_isdst = -1; /* -1 means "information not available" */
1370 g_date_clamp (GDate *date,
1371 const GDate *min_date,
1372 const GDate *max_date)
1374 g_return_if_fail (g_date_valid (date));
1376 if (min_date != NULL)
1377 g_return_if_fail (g_date_valid (min_date));
1379 if (max_date != NULL)
1380 g_return_if_fail (g_date_valid (max_date));
1382 if (min_date != NULL && max_date != NULL)
1383 g_return_if_fail (g_date_compare (min_date, max_date) <= 0);
1385 if (min_date && g_date_compare (date, min_date) < 0)
1388 if (max_date && g_date_compare (max_date, date) < 0)
1393 g_date_order (GDate *date1,
1396 g_return_if_fail (g_date_valid (date1));
1397 g_return_if_fail (g_date_valid (date2));
1399 if (g_date_compare (date1, date2) > 0)
1409 win32_strftime_helper (const GDate *d,
1410 const gchar *format,
1411 const struct tm *tm,
1415 SYSTEMTIME systemtime;
1416 TIME_ZONE_INFORMATION tzinfo;
1422 const wchar_t digits[] = L"0123456789";
1427 systemtime.wYear = tm->tm_year + 1900;
1428 systemtime.wMonth = tm->tm_mon + 1;
1429 systemtime.wDayOfWeek = tm->tm_wday;
1430 systemtime.wDay = tm->tm_mday;
1431 systemtime.wHour = tm->tm_hour;
1432 systemtime.wMinute = tm->tm_min;
1433 systemtime.wSecond = tm->tm_sec;
1434 systemtime.wMilliseconds = 0;
1436 lcid = GetThreadLocale ();
1437 result = g_array_sized_new (FALSE, FALSE, sizeof (wchar_t), MAX (128, strlen (format) * 2));
1442 c = g_utf8_get_char (p);
1445 p = g_utf8_next_char (p);
1449 g_array_free (result, TRUE);
1454 c = g_utf8_get_char (p);
1455 if (c == 'E' || c == 'O')
1457 /* Ignore modified conversion specifiers for now. */
1458 p = g_utf8_next_char (p);
1462 g_array_free (result, TRUE);
1467 c = g_utf8_get_char (p);
1473 if (systemtime.wDayOfWeek == 0)
1476 k = systemtime.wDayOfWeek - 1;
1477 n = GetLocaleInfoW (lcid, LOCALE_SABBREVDAYNAME1+k, NULL, 0);
1478 g_array_set_size (result, result->len + n);
1479 GetLocaleInfoW (lcid, LOCALE_SABBREVDAYNAME1+k, ((wchar_t *) result->data) + result->len - n, n);
1480 g_array_set_size (result, result->len - 1);
1483 if (systemtime.wDayOfWeek == 0)
1486 k = systemtime.wDayOfWeek - 1;
1487 n = GetLocaleInfoW (lcid, LOCALE_SDAYNAME1+k, NULL, 0);
1488 g_array_set_size (result, result->len + n);
1489 GetLocaleInfoW (lcid, LOCALE_SDAYNAME1+k, ((wchar_t *) result->data) + result->len - n, n);
1490 g_array_set_size (result, result->len - 1);
1494 n = GetLocaleInfoW (lcid, LOCALE_SABBREVMONTHNAME1+systemtime.wMonth-1, NULL, 0);
1495 g_array_set_size (result, result->len + n);
1496 GetLocaleInfoW (lcid, LOCALE_SABBREVMONTHNAME1+systemtime.wMonth-1, ((wchar_t *) result->data) + result->len - n, n);
1497 g_array_set_size (result, result->len - 1);
1500 n = GetLocaleInfoW (lcid, LOCALE_SMONTHNAME1+systemtime.wMonth-1, NULL, 0);
1501 g_array_set_size (result, result->len + n);
1502 GetLocaleInfoW (lcid, LOCALE_SMONTHNAME1+systemtime.wMonth-1, ((wchar_t *) result->data) + result->len - n, n);
1503 g_array_set_size (result, result->len - 1);
1506 n = GetDateFormatW (lcid, 0, &systemtime, NULL, NULL, 0);
1509 g_array_set_size (result, result->len + n);
1510 GetDateFormatW (lcid, 0, &systemtime, NULL, ((wchar_t *) result->data) + result->len - n, n);
1511 g_array_set_size (result, result->len - 1);
1513 g_array_append_vals (result, L" ", 1);
1514 n = GetTimeFormatW (lcid, 0, &systemtime, NULL, NULL, 0);
1517 g_array_set_size (result, result->len + n);
1518 GetTimeFormatW (lcid, 0, &systemtime, NULL, ((wchar_t *) result->data) + result->len - n, n);
1519 g_array_set_size (result, result->len - 1);
1523 g_array_append_vals (result, digits + systemtime.wYear/1000, 1);
1524 g_array_append_vals (result, digits + (systemtime.wYear/1000)%10, 1);
1527 g_array_append_vals (result, digits + systemtime.wDay/10, 1);
1528 g_array_append_vals (result, digits + systemtime.wDay%10, 1);
1531 g_array_append_vals (result, digits + systemtime.wMonth/10, 1);
1532 g_array_append_vals (result, digits + systemtime.wMonth%10, 1);
1533 g_array_append_vals (result, L"/", 1);
1534 g_array_append_vals (result, digits + systemtime.wDay/10, 1);
1535 g_array_append_vals (result, digits + systemtime.wDay%10, 1);
1536 g_array_append_vals (result, L"/", 1);
1537 g_array_append_vals (result, digits + (systemtime.wYear/10)%10, 1);
1538 g_array_append_vals (result, digits + systemtime.wYear%10, 1);
1541 if (systemtime.wDay >= 10)
1542 g_array_append_vals (result, digits + systemtime.wDay/10, 1);
1544 g_array_append_vals (result, L" ", 1);
1545 g_array_append_vals (result, digits + systemtime.wDay%10, 1);
1548 /* A GDate has no time fields, so for now we can
1549 * hardcode all time conversions into zeros (or 12 for
1550 * %I). The alternative code snippets in the #else
1551 * branches are here ready to be taken into use when
1552 * needed by a g_strftime() or g_date_and_time_format()
1557 g_array_append_vals (result, L"00", 2);
1559 g_array_append_vals (result, digits + systemtime.wHour/10, 1);
1560 g_array_append_vals (result, digits + systemtime.wHour%10, 1);
1565 g_array_append_vals (result, L"12", 2);
1567 if (systemtime.wHour == 0)
1568 g_array_append_vals (result, L"12", 2);
1571 g_array_append_vals (result, digits + (systemtime.wHour%12)/10, 1);
1572 g_array_append_vals (result, digits + (systemtime.wHour%12)%10, 1);
1577 g_array_append_vals (result, digits + (tm->tm_yday+1)/100, 1);
1578 g_array_append_vals (result, digits + ((tm->tm_yday+1)/10)%10, 1);
1579 g_array_append_vals (result, digits + (tm->tm_yday+1)%10, 1);
1582 g_array_append_vals (result, digits + systemtime.wMonth/10, 1);
1583 g_array_append_vals (result, digits + systemtime.wMonth%10, 1);
1587 g_array_append_vals (result, L"00", 2);
1589 g_array_append_vals (result, digits + systemtime.wMinute/10, 1);
1590 g_array_append_vals (result, digits + systemtime.wMinute%10, 1);
1594 g_array_append_vals (result, L"\n", 1);
1597 n = GetTimeFormatW (lcid, 0, &systemtime, L"tt", NULL, 0);
1600 g_array_set_size (result, result->len + n);
1601 GetTimeFormatW (lcid, 0, &systemtime, L"tt", ((wchar_t *) result->data) + result->len - n, n);
1602 g_array_set_size (result, result->len - 1);
1606 /* This is a rather odd format. Hard to say what to do.
1607 * Let's always use the POSIX %I:%M:%S %p
1610 g_array_append_vals (result, L"12:00:00", 8);
1612 if (systemtime.wHour == 0)
1613 g_array_append_vals (result, L"12", 2);
1616 g_array_append_vals (result, digits + (systemtime.wHour%12)/10, 1);
1617 g_array_append_vals (result, digits + (systemtime.wHour%12)%10, 1);
1619 g_array_append_vals (result, L":", 1);
1620 g_array_append_vals (result, digits + systemtime.wMinute/10, 1);
1621 g_array_append_vals (result, digits + systemtime.wMinute%10, 1);
1622 g_array_append_vals (result, L":", 1);
1623 g_array_append_vals (result, digits + systemtime.wSecond/10, 1);
1624 g_array_append_vals (result, digits + systemtime.wSecond%10, 1);
1625 g_array_append_vals (result, L" ", 1);
1627 n = GetTimeFormatW (lcid, 0, &systemtime, L"tt", NULL, 0);
1630 g_array_set_size (result, result->len + n);
1631 GetTimeFormatW (lcid, 0, &systemtime, L"tt", ((wchar_t *) result->data) + result->len - n, n);
1632 g_array_set_size (result, result->len - 1);
1637 g_array_append_vals (result, L"00:00", 5);
1639 g_array_append_vals (result, digits + systemtime.wHour/10, 1);
1640 g_array_append_vals (result, digits + systemtime.wHour%10, 1);
1641 g_array_append_vals (result, L":", 1);
1642 g_array_append_vals (result, digits + systemtime.wMinute/10, 1);
1643 g_array_append_vals (result, digits + systemtime.wMinute%10, 1);
1648 g_array_append_vals (result, L"00", 2);
1650 g_array_append_vals (result, digits + systemtime.wSecond/10, 1);
1651 g_array_append_vals (result, digits + systemtime.wSecond%10, 1);
1655 g_array_append_vals (result, L"\t", 1);
1659 g_array_append_vals (result, L"00:00:00", 8);
1661 g_array_append_vals (result, digits + systemtime.wHour/10, 1);
1662 g_array_append_vals (result, digits + systemtime.wHour%10, 1);
1663 g_array_append_vals (result, L":", 1);
1664 g_array_append_vals (result, digits + systemtime.wMinute/10, 1);
1665 g_array_append_vals (result, digits + systemtime.wMinute%10, 1);
1666 g_array_append_vals (result, L":", 1);
1667 g_array_append_vals (result, digits + systemtime.wSecond/10, 1);
1668 g_array_append_vals (result, digits + systemtime.wSecond%10, 1);
1672 if (systemtime.wDayOfWeek == 0)
1673 g_array_append_vals (result, L"7", 1);
1675 g_array_append_vals (result, digits + systemtime.wDayOfWeek, 1);
1678 n = g_date_get_sunday_week_of_year (d);
1679 g_array_append_vals (result, digits + n/10, 1);
1680 g_array_append_vals (result, digits + n%10, 1);
1683 n = g_date_get_iso8601_week_of_year (d);
1684 g_array_append_vals (result, digits + n/10, 1);
1685 g_array_append_vals (result, digits + n%10, 1);
1688 g_array_append_vals (result, digits + systemtime.wDayOfWeek, 1);
1691 n = g_date_get_monday_week_of_year (d);
1692 g_array_append_vals (result, digits + n/10, 1);
1693 g_array_append_vals (result, digits + n%10, 1);
1696 n = GetDateFormatW (lcid, 0, &systemtime, NULL, NULL, 0);
1699 g_array_set_size (result, result->len + n);
1700 GetDateFormatW (lcid, 0, &systemtime, NULL, ((wchar_t *) result->data) + result->len - n, n);
1701 g_array_set_size (result, result->len - 1);
1705 n = GetTimeFormatW (lcid, 0, &systemtime, NULL, NULL, 0);
1708 g_array_set_size (result, result->len + n);
1709 GetTimeFormatW (lcid, 0, &systemtime, NULL, ((wchar_t *) result->data) + result->len - n, n);
1710 g_array_set_size (result, result->len - 1);
1714 g_array_append_vals (result, digits + (systemtime.wYear/10)%10, 1);
1715 g_array_append_vals (result, digits + systemtime.wYear%10, 1);
1718 g_array_append_vals (result, digits + systemtime.wYear/1000, 1);
1719 g_array_append_vals (result, digits + (systemtime.wYear/100)%10, 1);
1720 g_array_append_vals (result, digits + (systemtime.wYear/10)%10, 1);
1721 g_array_append_vals (result, digits + systemtime.wYear%10, 1);
1724 n = GetTimeZoneInformation (&tzinfo);
1725 if (n == TIME_ZONE_ID_UNKNOWN)
1727 else if (n == TIME_ZONE_ID_STANDARD)
1728 g_array_append_vals (result, tzinfo.StandardName, wcslen (tzinfo.StandardName));
1729 else if (n == TIME_ZONE_ID_DAYLIGHT)
1730 g_array_append_vals (result, tzinfo.DaylightName, wcslen (tzinfo.DaylightName));
1733 g_array_append_vals (result, L"%", 1);
1737 else if (c <= 0xFFFF)
1740 g_array_append_vals (result, &wc, 1);
1747 ws = g_ucs4_to_utf16 (&c, 1, NULL, &nwc, NULL);
1748 g_array_append_vals (result, ws, nwc);
1751 p = g_utf8_next_char (p);
1754 convbuf = g_utf16_to_utf8 ((wchar_t *) result->data, result->len, NULL, &convlen, NULL);
1755 g_array_free (result, TRUE);
1763 if (slen <= convlen)
1765 /* Ensure only whole characters are copied into the buffer. */
1766 gchar *end = g_utf8_find_prev_char (convbuf, convbuf + slen);
1767 g_assert (end != NULL);
1768 convlen = end - convbuf;
1770 /* Return 0 because the buffer isn't large enough. */
1776 memcpy (s, convbuf, convlen);
1786 g_date_strftime (gchar *s,
1788 const gchar *format,
1793 gsize locale_format_len = 0;
1794 gchar *locale_format;
1800 GError *error = NULL;
1804 g_return_val_if_fail (g_date_valid (d), 0);
1805 g_return_val_if_fail (slen > 0, 0);
1806 g_return_val_if_fail (format != NULL, 0);
1807 g_return_val_if_fail (s != NULL, 0);
1809 g_date_to_struct_tm (d, &tm);
1812 if (!g_utf8_validate (format, -1, NULL))
1817 return win32_strftime_helper (d, format, &tm, s, slen);
1820 locale_format = g_locale_from_utf8 (format, -1, NULL, &locale_format_len, &error);
1824 g_warning (G_STRLOC "Error converting format to locale encoding: %s\n", error->message);
1825 g_error_free (error);
1831 tmpbufsize = MAX (128, locale_format_len * 2);
1834 tmpbuf = g_malloc (tmpbufsize);
1836 /* Set the first byte to something other than '\0', to be able to
1837 * recognize whether strftime actually failed or just returned "".
1840 tmplen = strftime (tmpbuf, tmpbufsize, locale_format, &tm);
1842 if (tmplen == 0 && tmpbuf[0] != '\0')
1847 if (tmpbufsize > 65536)
1849 g_warning (G_STRLOC "Maximum buffer size for g_date_strftime exceeded: giving up\n");
1850 g_free (locale_format);
1859 g_free (locale_format);
1861 convbuf = g_locale_to_utf8 (tmpbuf, tmplen, NULL, &convlen, &error);
1866 g_warning (G_STRLOC "Error converting results of strftime to UTF-8: %s\n", error->message);
1867 g_error_free (error);
1873 if (slen <= convlen)
1875 /* Ensure only whole characters are copied into the buffer.
1877 gchar *end = g_utf8_find_prev_char (convbuf, convbuf + slen);
1878 g_assert (end != NULL);
1879 convlen = end - convbuf;
1881 /* Return 0 because the buffer isn't large enough.
1888 memcpy (s, convbuf, convlen);
1896 #define __G_DATE_C__
1897 #include "galiasdef.c"