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/.
32 #include "glibconfig.h"
34 #define DEBUG_MSG(x) /* */
36 /* #define DEBUG_MSG(args) g_message args ; */
52 #include "gstrfuncs.h"
53 #include "gtestutils.h"
64 GDate *d = g_new0 (GDate, 1); /* happily, 0 is the invalid flag for everything. */
70 g_date_new_dmy (GDateDay day,
75 g_return_val_if_fail (g_date_valid_dmy (day, m, y), NULL);
86 g_assert (g_date_valid (d));
92 g_date_new_julian (guint32 j)
95 g_return_val_if_fail (g_date_valid_julian (j), NULL);
104 g_assert (g_date_valid (d));
110 g_date_free (GDate *d)
112 g_return_if_fail (d != NULL);
118 g_date_valid (const GDate *d)
120 g_return_val_if_fail (d != NULL, FALSE);
122 return (d->julian || d->dmy);
125 static const guint8 days_in_months[2][13] =
126 { /* error, jan feb mar apr may jun jul aug sep oct nov dec */
127 { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
128 { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } /* leap year */
131 static const guint16 days_in_year[2][14] =
132 { /* 0, jan feb mar apr may jun jul aug sep oct nov dec */
133 { 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
134 { 0, 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
138 g_date_valid_month (GDateMonth m)
140 return ( (m > G_DATE_BAD_MONTH) && (m < 13) );
144 g_date_valid_year (GDateYear y)
146 return ( y > G_DATE_BAD_YEAR );
150 g_date_valid_day (GDateDay d)
152 return ( (d > G_DATE_BAD_DAY) && (d < 32) );
156 g_date_valid_weekday (GDateWeekday w)
158 return ( (w > G_DATE_BAD_WEEKDAY) && (w < 8) );
162 g_date_valid_julian (guint32 j)
164 return (j > G_DATE_BAD_JULIAN);
168 g_date_valid_dmy (GDateDay d,
172 return ( (m > G_DATE_BAD_MONTH) &&
174 (d > G_DATE_BAD_DAY) &&
175 (y > G_DATE_BAD_YEAR) && /* must check before using g_date_is_leap_year */
176 (d <= (g_date_is_leap_year (y) ?
177 days_in_months[1][m] : days_in_months[0][m])) );
181 /* "Julian days" just means an absolute number of days, where Day 1 ==
185 g_date_update_julian (const GDate *const_d)
187 GDate *d = (GDate *) const_d;
191 g_return_if_fail (d != NULL);
192 g_return_if_fail (d->dmy);
193 g_return_if_fail (!d->julian);
194 g_return_if_fail (g_date_valid_dmy (d->day, d->month, d->year));
196 /* What we actually do is: multiply years * 365 days in the year,
197 * add the number of years divided by 4, subtract the number of
198 * years divided by 100 and add the number of years divided by 400,
199 * which accounts for leap year stuff. Code from Steffen Beyer's
203 year = d->year - 1; /* we know d->year > 0 since it's valid */
205 d->julian_days = year * 365U;
206 d->julian_days += (year >>= 2); /* divide by 4 and add */
207 d->julian_days -= (year /= 25); /* divides original # years by 100 */
208 d->julian_days += year >> 2; /* divides by 4, which divides original by 400 */
210 idx = g_date_is_leap_year (d->year) ? 1 : 0;
212 d->julian_days += days_in_year[idx][d->month] + d->day;
214 g_return_if_fail (g_date_valid_julian (d->julian_days));
220 g_date_update_dmy (const GDate *const_d)
222 GDate *d = (GDate *) const_d;
227 guint32 A, B, C, D, E, M;
229 g_return_if_fail (d != NULL);
230 g_return_if_fail (d->julian);
231 g_return_if_fail (!d->dmy);
232 g_return_if_fail (g_date_valid_julian (d->julian_days));
234 /* Formula taken from the Calendar FAQ; the formula was for the
235 * Julian Period which starts on 1 January 4713 BC, so we add
236 * 1,721,425 to the number of days before doing the formula.
238 * I'm sure this can be simplified for our 1 January 1 AD period
239 * start, but I can't figure out how to unpack the formula.
242 A = d->julian_days + 1721425 + 32045;
243 B = ( 4 *(A + 36524) )/ 146097 - 1;
244 C = A - (146097 * B)/4;
245 D = ( 4 * (C + 365) ) / 1461 - 1;
246 E = C - ((1461*D) / 4);
247 M = (5 * (E - 1) + 2)/153;
249 m = M + 3 - (12*(M/10));
250 day = E - (153*M + 2)/5;
251 y = 100 * B + D - 4800 + (M/10);
253 #ifdef G_ENABLE_DEBUG
254 if (!g_date_valid_dmy (day, m, y))
255 g_warning ("\nOOPS julian: %u computed dmy: %u %u %u\n",
256 d->julian_days, day, m, y);
267 g_date_get_weekday (const GDate *d)
269 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_WEEKDAY);
272 g_date_update_julian (d);
274 g_return_val_if_fail (d->julian, G_DATE_BAD_WEEKDAY);
276 return ((d->julian_days - 1) % 7) + 1;
280 g_date_get_month (const GDate *d)
282 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_MONTH);
285 g_date_update_dmy (d);
287 g_return_val_if_fail (d->dmy, G_DATE_BAD_MONTH);
293 g_date_get_year (const GDate *d)
295 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_YEAR);
298 g_date_update_dmy (d);
300 g_return_val_if_fail (d->dmy, G_DATE_BAD_YEAR);
306 g_date_get_day (const GDate *d)
308 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_DAY);
311 g_date_update_dmy (d);
313 g_return_val_if_fail (d->dmy, G_DATE_BAD_DAY);
319 g_date_get_julian (const GDate *d)
321 g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_JULIAN);
324 g_date_update_julian (d);
326 g_return_val_if_fail (d->julian, G_DATE_BAD_JULIAN);
328 return d->julian_days;
332 g_date_get_day_of_year (const GDate *d)
336 g_return_val_if_fail (g_date_valid (d), 0);
339 g_date_update_dmy (d);
341 g_return_val_if_fail (d->dmy, 0);
343 idx = g_date_is_leap_year (d->year) ? 1 : 0;
345 return (days_in_year[idx][d->month] + d->day);
349 g_date_get_monday_week_of_year (const GDate *d)
355 g_return_val_if_fail (g_date_valid (d), 0);
358 g_date_update_dmy (d);
360 g_return_val_if_fail (d->dmy, 0);
362 g_date_clear (&first, 1);
364 g_date_set_dmy (&first, 1, 1, d->year);
366 wd = g_date_get_weekday (&first) - 1; /* make Monday day 0 */
367 day = g_date_get_day_of_year (d) - 1;
369 return ((day + wd)/7U + (wd == 0 ? 1 : 0));
373 g_date_get_sunday_week_of_year (const GDate *d)
379 g_return_val_if_fail (g_date_valid (d), 0);
382 g_date_update_dmy (d);
384 g_return_val_if_fail (d->dmy, 0);
386 g_date_clear (&first, 1);
388 g_date_set_dmy (&first, 1, 1, d->year);
390 wd = g_date_get_weekday (&first);
391 if (wd == 7) wd = 0; /* make Sunday day 0 */
392 day = g_date_get_day_of_year (d) - 1;
394 return ((day + wd)/7U + (wd == 0 ? 1 : 0));
398 * g_date_get_iso8601_week_of_year:
399 * @date: a valid #GDate
401 * Returns the week of the year, where weeks are interpreted according
404 * Returns: ISO 8601 week number of the year.
409 g_date_get_iso8601_week_of_year (const GDate *d)
411 guint j, d4, L, d1, w;
413 g_return_val_if_fail (g_date_valid (d), 0);
416 g_date_update_julian (d);
418 g_return_val_if_fail (d->julian, 0);
420 /* Formula taken from the Calendar FAQ; the formula was for the
421 * Julian Period which starts on 1 January 4713 BC, so we add
422 * 1,721,425 to the number of days before doing the formula.
424 j = d->julian_days + 1721425;
425 d4 = (j + 31741 - (j % 7)) % 146097 % 36524 % 1461;
427 d1 = ((d4 - L) % 365) + L;
434 g_date_days_between (const GDate *d1,
437 g_return_val_if_fail (g_date_valid (d1), 0);
438 g_return_val_if_fail (g_date_valid (d2), 0);
440 return (gint)g_date_get_julian (d2) - (gint)g_date_get_julian (d1);
444 g_date_clear (GDate *d, guint ndates)
446 g_return_if_fail (d != NULL);
447 g_return_if_fail (ndates != 0);
449 memset (d, 0x0, ndates*sizeof (GDate));
452 G_LOCK_DEFINE_STATIC (g_date_global);
454 /* These are for the parser, output to the user should use *
455 * g_date_strftime () - this creates more never-freed memory to annoy
456 * all those memory debugger users. :-)
459 static gchar *long_month_names[13] =
464 static gchar *short_month_names[13] =
469 /* This tells us if we need to update the parse info */
470 static gchar *current_locale = NULL;
472 /* order of these in the current locale */
473 static GDateDMY dmy_order[3] =
475 G_DATE_DAY, G_DATE_MONTH, G_DATE_YEAR
478 /* Where to chop two-digit years: i.e., for the 1930 default, numbers
479 * 29 and below are counted as in the year 2000, numbers 30 and above
480 * are counted as in the year 1900.
483 static const GDateYear twodigit_start_year = 1930;
485 /* It is impossible to enter a year between 1 AD and 99 AD with this
488 static gboolean using_twodigit_years = FALSE;
490 /* Adjustment of locale era to AD, non-zero means using locale era
492 static gint locale_era_adjust = 0;
494 struct _GDateParseTokens {
500 typedef struct _GDateParseTokens GDateParseTokens;
504 /* HOLDS: g_date_global_lock */
506 g_date_fill_parse_tokens (const gchar *str, GDateParseTokens *pt)
508 gchar num[4][NUM_LEN+1];
512 /* We count 4, but store 3; so we can give an error
515 num[0][0] = num[1][0] = num[2][0] = num[3][0] = '\0';
517 s = (const guchar *) str;
519 while (*s && pt->num_ints < 4)
523 while (*s && g_ascii_isdigit (*s) && i < NUM_LEN)
525 num[pt->num_ints][i] = *s;
532 num[pt->num_ints][i] = '\0';
536 if (*s == '\0') break;
541 pt->n[0] = pt->num_ints > 0 ? atoi (num[0]) : 0;
542 pt->n[1] = pt->num_ints > 1 ? atoi (num[1]) : 0;
543 pt->n[2] = pt->num_ints > 2 ? atoi (num[2]) : 0;
545 pt->month = G_DATE_BAD_MONTH;
547 if (pt->num_ints < 3)
552 casefold = g_utf8_casefold (str, -1);
553 normalized = g_utf8_normalize (casefold, -1, G_NORMALIZE_ALL);
559 if (long_month_names[i] != NULL)
561 const gchar *found = strstr (normalized, long_month_names[i]);
570 if (short_month_names[i] != NULL)
572 const gchar *found = strstr (normalized, short_month_names[i]);
588 /* HOLDS: g_date_global_lock */
590 g_date_prepare_to_parse (const gchar *str,
591 GDateParseTokens *pt)
593 const gchar *locale = setlocale (LC_TIME, NULL);
594 gboolean recompute_localeinfo = FALSE;
597 g_return_if_fail (locale != NULL); /* should not happen */
599 g_date_clear (&d, 1); /* clear for scratch use */
601 if ( (current_locale == NULL) || (strcmp (locale, current_locale) != 0) )
602 recompute_localeinfo = TRUE; /* Uh, there used to be a reason for the temporary */
604 if (recompute_localeinfo)
607 GDateParseTokens testpt;
610 g_free (current_locale); /* still works if current_locale == NULL */
612 current_locale = g_strdup (locale);
614 short_month_names[0] = "Error";
615 long_month_names[0] = "Error";
621 g_date_set_dmy (&d, 1, i, 1);
623 g_return_if_fail (g_date_valid (&d));
625 g_date_strftime (buf, 127, "%b", &d);
627 casefold = g_utf8_casefold (buf, -1);
628 g_free (short_month_names[i]);
629 short_month_names[i] = g_utf8_normalize (casefold, -1, G_NORMALIZE_ALL);
632 g_date_strftime (buf, 127, "%B", &d);
633 casefold = g_utf8_casefold (buf, -1);
634 g_free (long_month_names[i]);
635 long_month_names[i] = g_utf8_normalize (casefold, -1, G_NORMALIZE_ALL);
641 /* Determine DMY order */
643 /* had to pick a random day - don't change this, some strftimes
644 * are broken on some days, and this one is good so far. */
645 g_date_set_dmy (&d, 4, 7, 1976);
647 g_date_strftime (buf, 127, "%x", &d);
649 g_date_fill_parse_tokens (buf, &testpt);
652 while (i < testpt.num_ints)
657 dmy_order[i] = G_DATE_MONTH;
660 dmy_order[i] = G_DATE_DAY;
663 using_twodigit_years = TRUE; /* FALL THRU */
665 dmy_order[i] = G_DATE_YEAR;
668 /* assume locale era */
669 locale_era_adjust = 1976 - testpt.n[i];
670 dmy_order[i] = G_DATE_YEAR;
676 #if defined(G_ENABLE_DEBUG) && 0
677 DEBUG_MSG (("**GDate prepared a new set of locale-specific parse rules."));
681 DEBUG_MSG ((" %s %s", long_month_names[i], short_month_names[i]));
684 if (using_twodigit_years)
686 DEBUG_MSG (("**Using twodigit years with cutoff year: %u", twodigit_start_year));
693 switch (dmy_order[i])
696 strings[i] = "Month";
710 DEBUG_MSG (("**Order: %s, %s, %s", strings[0], strings[1], strings[2]));
711 DEBUG_MSG (("**Sample date in this locale: `%s'", buf));
716 g_date_fill_parse_tokens (str, pt);
720 g_date_set_parse (GDate *d,
724 guint m = G_DATE_BAD_MONTH, day = G_DATE_BAD_DAY, y = G_DATE_BAD_YEAR;
726 g_return_if_fail (d != NULL);
731 G_LOCK (g_date_global);
733 g_date_prepare_to_parse (str, &pt);
735 DEBUG_MSG (("Found %d ints, `%d' `%d' `%d' and written out month %d",
736 pt.num_ints, pt.n[0], pt.n[1], pt.n[2], pt.month));
739 if (pt.num_ints == 4)
741 G_UNLOCK (g_date_global);
742 return; /* presumably a typo; bail out. */
750 g_assert (pt.num_ints < 4); /* i.e., it is 2 or 3 */
752 while (i < pt.num_ints && j < 3)
754 switch (dmy_order[j])
758 if (pt.num_ints == 2 && pt.month != G_DATE_BAD_MONTH)
761 ++j; /* skip months, but don't skip this number */
770 if (pt.num_ints == 2 && pt.month == G_DATE_BAD_MONTH)
773 ++j; /* skip days, since we may have month/year */
783 if (locale_era_adjust != 0)
785 y += locale_era_adjust;
787 else if (using_twodigit_years && y < 100)
789 guint two = twodigit_start_year % 100;
790 guint century = (twodigit_start_year / 100) * 100;
808 if (pt.num_ints == 3 && !g_date_valid_dmy (day, m, y))
815 if (using_twodigit_years && y < 100)
816 y = G_DATE_BAD_YEAR; /* avoids ambiguity */
818 else if (pt.num_ints == 2)
820 if (m == G_DATE_BAD_MONTH && pt.month != G_DATE_BAD_MONTH)
824 else if (pt.num_ints == 1)
826 if (pt.month != G_DATE_BAD_MONTH)
828 /* Month name and year? */
835 /* Try yyyymmdd and yymmdd */
837 m = (pt.n[0]/100) % 100;
841 /* FIXME move this into a separate function */
842 if (using_twodigit_years && y < 100)
844 guint two = twodigit_start_year % 100;
845 guint century = (twodigit_start_year / 100) * 100;
855 /* See if we got anything valid out of all this. */
856 /* y < 8000 is to catch 19998 style typos; the library is OK up to 65535 or so */
857 if (y < 8000 && g_date_valid_dmy (day, m, y))
864 #ifdef G_ENABLE_DEBUG
867 DEBUG_MSG (("Rejected DMY %u %u %u", day, m, y));
870 G_UNLOCK (g_date_global);
876 * @timet: <type>time_t</type> value to set
878 * Sets the value of a date to the date corresponding to a time
879 * specified as a time_t. The time to date conversion is done using
880 * the user's current timezone.
882 * To set the value of a date to the current day, you could write:
884 * g_date_set_time_t (date, time (NULL));
890 g_date_set_time_t (GDate *date,
895 g_return_if_fail (date != NULL);
897 #ifdef HAVE_LOCALTIME_R
898 localtime_r (&timet, &tm);
901 struct tm *ptm = localtime (&timet);
905 /* Happens at least in Microsoft's C library if you pass a
906 * negative time_t. Use 2000-01-01 as default date.
908 #ifndef G_DISABLE_CHECKS
909 g_return_if_fail_warning (G_LOG_DOMAIN, "g_date_set_time", "ptm != NULL");
917 memcpy ((void *) &tm, (void *) ptm, sizeof(struct tm));
921 date->julian = FALSE;
923 date->month = tm.tm_mon + 1;
924 date->day = tm.tm_mday;
925 date->year = tm.tm_year + 1900;
927 g_return_if_fail (g_date_valid_dmy (date->day, date->month, date->year));
936 * @time_: #GTime value to set.
938 * Sets the value of a date from a #GTime value.
939 * The time to date conversion is done using the user's current timezone.
941 * Deprecated: 2.10: Use g_date_set_time_t() instead.
944 g_date_set_time (GDate *date,
947 g_date_set_time_t (date, (time_t) time_);
951 * g_date_set_time_val:
953 * @timeval: #GTimeVal value to set
955 * Sets the value of a date from a #GTimeVal value. Note that the
956 * @tv_usec member is ignored, because #GDate can't make use of the
957 * additional precision.
959 * The time to date conversion is done using the user's current timezone.
964 g_date_set_time_val (GDate *date,
967 g_date_set_time_t (date, (time_t) timeval->tv_sec);
971 g_date_set_month (GDate *d,
974 g_return_if_fail (d != NULL);
975 g_return_if_fail (g_date_valid_month (m));
977 if (d->julian && !d->dmy) g_date_update_dmy(d);
982 if (g_date_valid_dmy (d->day, d->month, d->year))
989 g_date_set_day (GDate *d,
992 g_return_if_fail (d != NULL);
993 g_return_if_fail (g_date_valid_day (day));
995 if (d->julian && !d->dmy) g_date_update_dmy(d);
1000 if (g_date_valid_dmy (d->day, d->month, d->year))
1007 g_date_set_year (GDate *d,
1010 g_return_if_fail (d != NULL);
1011 g_return_if_fail (g_date_valid_year (y));
1013 if (d->julian && !d->dmy) g_date_update_dmy(d);
1018 if (g_date_valid_dmy (d->day, d->month, d->year))
1025 g_date_set_dmy (GDate *d,
1030 g_return_if_fail (d != NULL);
1031 g_return_if_fail (g_date_valid_dmy (day, m, y));
1043 g_date_set_julian (GDate *d,
1046 g_return_if_fail (d != NULL);
1047 g_return_if_fail (g_date_valid_julian (j));
1056 g_date_is_first_of_month (const GDate *d)
1058 g_return_val_if_fail (g_date_valid (d), FALSE);
1061 g_date_update_dmy (d);
1063 g_return_val_if_fail (d->dmy, FALSE);
1065 if (d->day == 1) return TRUE;
1070 g_date_is_last_of_month (const GDate *d)
1074 g_return_val_if_fail (g_date_valid (d), FALSE);
1077 g_date_update_dmy (d);
1079 g_return_val_if_fail (d->dmy, FALSE);
1081 idx = g_date_is_leap_year (d->year) ? 1 : 0;
1083 if (d->day == days_in_months[idx][d->month]) return TRUE;
1088 g_date_add_days (GDate *d,
1091 g_return_if_fail (g_date_valid (d));
1094 g_date_update_julian (d);
1096 g_return_if_fail (d->julian);
1098 d->julian_days += ndays;
1103 g_date_subtract_days (GDate *d,
1106 g_return_if_fail (g_date_valid (d));
1109 g_date_update_julian (d);
1111 g_return_if_fail (d->julian);
1112 g_return_if_fail (d->julian_days > ndays);
1114 d->julian_days -= ndays;
1119 g_date_add_months (GDate *d,
1122 guint years, months;
1125 g_return_if_fail (g_date_valid (d));
1128 g_date_update_dmy (d);
1130 g_return_if_fail (d->dmy);
1132 nmonths += d->month - 1;
1135 months = nmonths%12;
1137 d->month = months + 1;
1140 idx = g_date_is_leap_year (d->year) ? 1 : 0;
1142 if (d->day > days_in_months[idx][d->month])
1143 d->day = days_in_months[idx][d->month];
1147 g_return_if_fail (g_date_valid (d));
1151 g_date_subtract_months (GDate *d,
1154 guint years, months;
1157 g_return_if_fail (g_date_valid (d));
1160 g_date_update_dmy (d);
1162 g_return_if_fail (d->dmy);
1165 months = nmonths%12;
1167 g_return_if_fail (d->year > years);
1171 if (d->month > months) d->month -= months;
1175 d->month = 12 - months;
1179 idx = g_date_is_leap_year (d->year) ? 1 : 0;
1181 if (d->day > days_in_months[idx][d->month])
1182 d->day = days_in_months[idx][d->month];
1186 g_return_if_fail (g_date_valid (d));
1190 g_date_add_years (GDate *d,
1193 g_return_if_fail (g_date_valid (d));
1196 g_date_update_dmy (d);
1198 g_return_if_fail (d->dmy);
1202 if (d->month == 2 && d->day == 29)
1204 if (!g_date_is_leap_year (d->year))
1212 g_date_subtract_years (GDate *d,
1215 g_return_if_fail (g_date_valid (d));
1218 g_date_update_dmy (d);
1220 g_return_if_fail (d->dmy);
1221 g_return_if_fail (d->year > nyears);
1225 if (d->month == 2 && d->day == 29)
1227 if (!g_date_is_leap_year (d->year))
1235 g_date_is_leap_year (GDateYear year)
1237 g_return_val_if_fail (g_date_valid_year (year), FALSE);
1239 return ( (((year % 4) == 0) && ((year % 100) != 0)) ||
1240 (year % 400) == 0 );
1244 g_date_get_days_in_month (GDateMonth month,
1249 g_return_val_if_fail (g_date_valid_year (year), 0);
1250 g_return_val_if_fail (g_date_valid_month (month), 0);
1252 idx = g_date_is_leap_year (year) ? 1 : 0;
1254 return days_in_months[idx][month];
1258 g_date_get_monday_weeks_in_year (GDateYear year)
1262 g_return_val_if_fail (g_date_valid_year (year), 0);
1264 g_date_clear (&d, 1);
1265 g_date_set_dmy (&d, 1, 1, year);
1266 if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53;
1267 g_date_set_dmy (&d, 31, 12, year);
1268 if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53;
1269 if (g_date_is_leap_year (year))
1271 g_date_set_dmy (&d, 2, 1, year);
1272 if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53;
1273 g_date_set_dmy (&d, 30, 12, year);
1274 if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53;
1280 g_date_get_sunday_weeks_in_year (GDateYear year)
1284 g_return_val_if_fail (g_date_valid_year (year), 0);
1286 g_date_clear (&d, 1);
1287 g_date_set_dmy (&d, 1, 1, year);
1288 if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53;
1289 g_date_set_dmy (&d, 31, 12, year);
1290 if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53;
1291 if (g_date_is_leap_year (year))
1293 g_date_set_dmy (&d, 2, 1, year);
1294 if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53;
1295 g_date_set_dmy (&d, 30, 12, year);
1296 if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53;
1302 g_date_compare (const GDate *lhs,
1305 g_return_val_if_fail (lhs != NULL, 0);
1306 g_return_val_if_fail (rhs != NULL, 0);
1307 g_return_val_if_fail (g_date_valid (lhs), 0);
1308 g_return_val_if_fail (g_date_valid (rhs), 0);
1310 /* Remember the self-comparison case! I think it works right now. */
1314 if (lhs->julian && rhs->julian)
1316 if (lhs->julian_days < rhs->julian_days) return -1;
1317 else if (lhs->julian_days > rhs->julian_days) return 1;
1320 else if (lhs->dmy && rhs->dmy)
1322 if (lhs->year < rhs->year) return -1;
1323 else if (lhs->year > rhs->year) return 1;
1326 if (lhs->month < rhs->month) return -1;
1327 else if (lhs->month > rhs->month) return 1;
1330 if (lhs->day < rhs->day) return -1;
1331 else if (lhs->day > rhs->day) return 1;
1340 if (!lhs->julian) g_date_update_julian (lhs);
1341 if (!rhs->julian) g_date_update_julian (rhs);
1342 g_return_val_if_fail (lhs->julian, 0);
1343 g_return_val_if_fail (rhs->julian, 0);
1347 return 0; /* warnings */
1352 g_date_to_struct_tm (const GDate *d,
1357 g_return_if_fail (g_date_valid (d));
1358 g_return_if_fail (tm != NULL);
1361 g_date_update_dmy (d);
1363 g_return_if_fail (d->dmy);
1365 /* zero all the irrelevant fields to be sure they're valid */
1367 /* On Linux and maybe other systems, there are weird non-POSIX
1368 * fields on the end of struct tm that choke strftime if they
1369 * contain garbage. So we need to 0 the entire struct, not just the
1370 * fields we know to exist.
1373 memset (tm, 0x0, sizeof (struct tm));
1375 tm->tm_mday = d->day;
1376 tm->tm_mon = d->month - 1; /* 0-11 goes in tm */
1377 tm->tm_year = ((int)d->year) - 1900; /* X/Open says tm_year can be negative */
1379 day = g_date_get_weekday (d);
1380 if (day == 7) day = 0; /* struct tm wants days since Sunday, so Sunday is 0 */
1382 tm->tm_wday = (int)day;
1384 tm->tm_yday = g_date_get_day_of_year (d) - 1; /* 0 to 365 */
1385 tm->tm_isdst = -1; /* -1 means "information not available" */
1389 g_date_clamp (GDate *date,
1390 const GDate *min_date,
1391 const GDate *max_date)
1393 g_return_if_fail (g_date_valid (date));
1395 if (min_date != NULL)
1396 g_return_if_fail (g_date_valid (min_date));
1398 if (max_date != NULL)
1399 g_return_if_fail (g_date_valid (max_date));
1401 if (min_date != NULL && max_date != NULL)
1402 g_return_if_fail (g_date_compare (min_date, max_date) <= 0);
1404 if (min_date && g_date_compare (date, min_date) < 0)
1407 if (max_date && g_date_compare (max_date, date) < 0)
1412 g_date_order (GDate *date1,
1415 g_return_if_fail (g_date_valid (date1));
1416 g_return_if_fail (g_date_valid (date2));
1418 if (g_date_compare (date1, date2) > 0)
1428 win32_strftime_helper (const GDate *d,
1429 const gchar *format,
1430 const struct tm *tm,
1434 SYSTEMTIME systemtime;
1435 TIME_ZONE_INFORMATION tzinfo;
1441 const wchar_t digits[] = L"0123456789";
1446 systemtime.wYear = tm->tm_year + 1900;
1447 systemtime.wMonth = tm->tm_mon + 1;
1448 systemtime.wDayOfWeek = tm->tm_wday;
1449 systemtime.wDay = tm->tm_mday;
1450 systemtime.wHour = tm->tm_hour;
1451 systemtime.wMinute = tm->tm_min;
1452 systemtime.wSecond = tm->tm_sec;
1453 systemtime.wMilliseconds = 0;
1455 lcid = GetThreadLocale ();
1456 result = g_array_sized_new (FALSE, FALSE, sizeof (wchar_t), MAX (128, strlen (format) * 2));
1461 c = g_utf8_get_char (p);
1464 p = g_utf8_next_char (p);
1468 g_array_free (result, TRUE);
1473 c = g_utf8_get_char (p);
1474 if (c == 'E' || c == 'O')
1476 /* Ignore modified conversion specifiers for now. */
1477 p = g_utf8_next_char (p);
1481 g_array_free (result, TRUE);
1486 c = g_utf8_get_char (p);
1492 if (systemtime.wDayOfWeek == 0)
1495 k = systemtime.wDayOfWeek - 1;
1496 n = GetLocaleInfoW (lcid, LOCALE_SABBREVDAYNAME1+k, NULL, 0);
1497 g_array_set_size (result, result->len + n);
1498 GetLocaleInfoW (lcid, LOCALE_SABBREVDAYNAME1+k, ((wchar_t *) result->data) + result->len - n, n);
1499 g_array_set_size (result, result->len - 1);
1502 if (systemtime.wDayOfWeek == 0)
1505 k = systemtime.wDayOfWeek - 1;
1506 n = GetLocaleInfoW (lcid, LOCALE_SDAYNAME1+k, NULL, 0);
1507 g_array_set_size (result, result->len + n);
1508 GetLocaleInfoW (lcid, LOCALE_SDAYNAME1+k, ((wchar_t *) result->data) + result->len - n, n);
1509 g_array_set_size (result, result->len - 1);
1513 n = GetLocaleInfoW (lcid, LOCALE_SABBREVMONTHNAME1+systemtime.wMonth-1, NULL, 0);
1514 g_array_set_size (result, result->len + n);
1515 GetLocaleInfoW (lcid, LOCALE_SABBREVMONTHNAME1+systemtime.wMonth-1, ((wchar_t *) result->data) + result->len - n, n);
1516 g_array_set_size (result, result->len - 1);
1519 n = GetLocaleInfoW (lcid, LOCALE_SMONTHNAME1+systemtime.wMonth-1, NULL, 0);
1520 g_array_set_size (result, result->len + n);
1521 GetLocaleInfoW (lcid, LOCALE_SMONTHNAME1+systemtime.wMonth-1, ((wchar_t *) result->data) + result->len - n, n);
1522 g_array_set_size (result, result->len - 1);
1525 n = GetDateFormatW (lcid, 0, &systemtime, NULL, NULL, 0);
1528 g_array_set_size (result, result->len + n);
1529 GetDateFormatW (lcid, 0, &systemtime, NULL, ((wchar_t *) result->data) + result->len - n, n);
1530 g_array_set_size (result, result->len - 1);
1532 g_array_append_vals (result, L" ", 1);
1533 n = GetTimeFormatW (lcid, 0, &systemtime, NULL, NULL, 0);
1536 g_array_set_size (result, result->len + n);
1537 GetTimeFormatW (lcid, 0, &systemtime, NULL, ((wchar_t *) result->data) + result->len - n, n);
1538 g_array_set_size (result, result->len - 1);
1542 g_array_append_vals (result, digits + systemtime.wYear/1000, 1);
1543 g_array_append_vals (result, digits + (systemtime.wYear/1000)%10, 1);
1546 g_array_append_vals (result, digits + systemtime.wDay/10, 1);
1547 g_array_append_vals (result, digits + systemtime.wDay%10, 1);
1550 g_array_append_vals (result, digits + systemtime.wMonth/10, 1);
1551 g_array_append_vals (result, digits + systemtime.wMonth%10, 1);
1552 g_array_append_vals (result, L"/", 1);
1553 g_array_append_vals (result, digits + systemtime.wDay/10, 1);
1554 g_array_append_vals (result, digits + systemtime.wDay%10, 1);
1555 g_array_append_vals (result, L"/", 1);
1556 g_array_append_vals (result, digits + (systemtime.wYear/10)%10, 1);
1557 g_array_append_vals (result, digits + systemtime.wYear%10, 1);
1560 if (systemtime.wDay >= 10)
1561 g_array_append_vals (result, digits + systemtime.wDay/10, 1);
1563 g_array_append_vals (result, L" ", 1);
1564 g_array_append_vals (result, digits + systemtime.wDay%10, 1);
1567 /* A GDate has no time fields, so for now we can
1568 * hardcode all time conversions into zeros (or 12 for
1569 * %I). The alternative code snippets in the #else
1570 * branches are here ready to be taken into use when
1571 * needed by a g_strftime() or g_date_and_time_format()
1576 g_array_append_vals (result, L"00", 2);
1578 g_array_append_vals (result, digits + systemtime.wHour/10, 1);
1579 g_array_append_vals (result, digits + systemtime.wHour%10, 1);
1584 g_array_append_vals (result, L"12", 2);
1586 if (systemtime.wHour == 0)
1587 g_array_append_vals (result, L"12", 2);
1590 g_array_append_vals (result, digits + (systemtime.wHour%12)/10, 1);
1591 g_array_append_vals (result, digits + (systemtime.wHour%12)%10, 1);
1596 g_array_append_vals (result, digits + (tm->tm_yday+1)/100, 1);
1597 g_array_append_vals (result, digits + ((tm->tm_yday+1)/10)%10, 1);
1598 g_array_append_vals (result, digits + (tm->tm_yday+1)%10, 1);
1601 g_array_append_vals (result, digits + systemtime.wMonth/10, 1);
1602 g_array_append_vals (result, digits + systemtime.wMonth%10, 1);
1606 g_array_append_vals (result, L"00", 2);
1608 g_array_append_vals (result, digits + systemtime.wMinute/10, 1);
1609 g_array_append_vals (result, digits + systemtime.wMinute%10, 1);
1613 g_array_append_vals (result, L"\n", 1);
1616 n = GetTimeFormatW (lcid, 0, &systemtime, L"tt", NULL, 0);
1619 g_array_set_size (result, result->len + n);
1620 GetTimeFormatW (lcid, 0, &systemtime, L"tt", ((wchar_t *) result->data) + result->len - n, n);
1621 g_array_set_size (result, result->len - 1);
1625 /* This is a rather odd format. Hard to say what to do.
1626 * Let's always use the POSIX %I:%M:%S %p
1629 g_array_append_vals (result, L"12:00:00", 8);
1631 if (systemtime.wHour == 0)
1632 g_array_append_vals (result, L"12", 2);
1635 g_array_append_vals (result, digits + (systemtime.wHour%12)/10, 1);
1636 g_array_append_vals (result, digits + (systemtime.wHour%12)%10, 1);
1638 g_array_append_vals (result, L":", 1);
1639 g_array_append_vals (result, digits + systemtime.wMinute/10, 1);
1640 g_array_append_vals (result, digits + systemtime.wMinute%10, 1);
1641 g_array_append_vals (result, L":", 1);
1642 g_array_append_vals (result, digits + systemtime.wSecond/10, 1);
1643 g_array_append_vals (result, digits + systemtime.wSecond%10, 1);
1644 g_array_append_vals (result, L" ", 1);
1646 n = GetTimeFormatW (lcid, 0, &systemtime, L"tt", NULL, 0);
1649 g_array_set_size (result, result->len + n);
1650 GetTimeFormatW (lcid, 0, &systemtime, L"tt", ((wchar_t *) result->data) + result->len - n, n);
1651 g_array_set_size (result, result->len - 1);
1656 g_array_append_vals (result, L"00:00", 5);
1658 g_array_append_vals (result, digits + systemtime.wHour/10, 1);
1659 g_array_append_vals (result, digits + systemtime.wHour%10, 1);
1660 g_array_append_vals (result, L":", 1);
1661 g_array_append_vals (result, digits + systemtime.wMinute/10, 1);
1662 g_array_append_vals (result, digits + systemtime.wMinute%10, 1);
1667 g_array_append_vals (result, L"00", 2);
1669 g_array_append_vals (result, digits + systemtime.wSecond/10, 1);
1670 g_array_append_vals (result, digits + systemtime.wSecond%10, 1);
1674 g_array_append_vals (result, L"\t", 1);
1678 g_array_append_vals (result, L"00:00:00", 8);
1680 g_array_append_vals (result, digits + systemtime.wHour/10, 1);
1681 g_array_append_vals (result, digits + systemtime.wHour%10, 1);
1682 g_array_append_vals (result, L":", 1);
1683 g_array_append_vals (result, digits + systemtime.wMinute/10, 1);
1684 g_array_append_vals (result, digits + systemtime.wMinute%10, 1);
1685 g_array_append_vals (result, L":", 1);
1686 g_array_append_vals (result, digits + systemtime.wSecond/10, 1);
1687 g_array_append_vals (result, digits + systemtime.wSecond%10, 1);
1691 if (systemtime.wDayOfWeek == 0)
1692 g_array_append_vals (result, L"7", 1);
1694 g_array_append_vals (result, digits + systemtime.wDayOfWeek, 1);
1697 n = g_date_get_sunday_week_of_year (d);
1698 g_array_append_vals (result, digits + n/10, 1);
1699 g_array_append_vals (result, digits + n%10, 1);
1702 n = g_date_get_iso8601_week_of_year (d);
1703 g_array_append_vals (result, digits + n/10, 1);
1704 g_array_append_vals (result, digits + n%10, 1);
1707 g_array_append_vals (result, digits + systemtime.wDayOfWeek, 1);
1710 n = g_date_get_monday_week_of_year (d);
1711 g_array_append_vals (result, digits + n/10, 1);
1712 g_array_append_vals (result, digits + n%10, 1);
1715 n = GetDateFormatW (lcid, 0, &systemtime, NULL, NULL, 0);
1718 g_array_set_size (result, result->len + n);
1719 GetDateFormatW (lcid, 0, &systemtime, NULL, ((wchar_t *) result->data) + result->len - n, n);
1720 g_array_set_size (result, result->len - 1);
1724 n = GetTimeFormatW (lcid, 0, &systemtime, NULL, NULL, 0);
1727 g_array_set_size (result, result->len + n);
1728 GetTimeFormatW (lcid, 0, &systemtime, NULL, ((wchar_t *) result->data) + result->len - n, n);
1729 g_array_set_size (result, result->len - 1);
1733 g_array_append_vals (result, digits + (systemtime.wYear/10)%10, 1);
1734 g_array_append_vals (result, digits + systemtime.wYear%10, 1);
1737 g_array_append_vals (result, digits + systemtime.wYear/1000, 1);
1738 g_array_append_vals (result, digits + (systemtime.wYear/100)%10, 1);
1739 g_array_append_vals (result, digits + (systemtime.wYear/10)%10, 1);
1740 g_array_append_vals (result, digits + systemtime.wYear%10, 1);
1743 n = GetTimeZoneInformation (&tzinfo);
1744 if (n == TIME_ZONE_ID_UNKNOWN)
1746 else if (n == TIME_ZONE_ID_STANDARD)
1747 g_array_append_vals (result, tzinfo.StandardName, wcslen (tzinfo.StandardName));
1748 else if (n == TIME_ZONE_ID_DAYLIGHT)
1749 g_array_append_vals (result, tzinfo.DaylightName, wcslen (tzinfo.DaylightName));
1752 g_array_append_vals (result, L"%", 1);
1756 else if (c <= 0xFFFF)
1759 g_array_append_vals (result, &wc, 1);
1766 ws = g_ucs4_to_utf16 (&c, 1, NULL, &nwc, NULL);
1767 g_array_append_vals (result, ws, nwc);
1770 p = g_utf8_next_char (p);
1773 convbuf = g_utf16_to_utf8 ((wchar_t *) result->data, result->len, NULL, &convlen, NULL);
1774 g_array_free (result, TRUE);
1782 if (slen <= convlen)
1784 /* Ensure only whole characters are copied into the buffer. */
1785 gchar *end = g_utf8_find_prev_char (convbuf, convbuf + slen);
1786 g_assert (end != NULL);
1787 convlen = end - convbuf;
1789 /* Return 0 because the buffer isn't large enough. */
1795 memcpy (s, convbuf, convlen);
1805 g_date_strftime (gchar *s,
1807 const gchar *format,
1812 gsize locale_format_len = 0;
1813 gchar *locale_format;
1819 GError *error = NULL;
1823 g_return_val_if_fail (g_date_valid (d), 0);
1824 g_return_val_if_fail (slen > 0, 0);
1825 g_return_val_if_fail (format != NULL, 0);
1826 g_return_val_if_fail (s != NULL, 0);
1828 g_date_to_struct_tm (d, &tm);
1831 if (!g_utf8_validate (format, -1, NULL))
1836 return win32_strftime_helper (d, format, &tm, s, slen);
1839 locale_format = g_locale_from_utf8 (format, -1, NULL, &locale_format_len, &error);
1843 g_warning (G_STRLOC "Error converting format to locale encoding: %s\n", error->message);
1844 g_error_free (error);
1850 tmpbufsize = MAX (128, locale_format_len * 2);
1853 tmpbuf = g_malloc (tmpbufsize);
1855 /* Set the first byte to something other than '\0', to be able to
1856 * recognize whether strftime actually failed or just returned "".
1859 tmplen = strftime (tmpbuf, tmpbufsize, locale_format, &tm);
1861 if (tmplen == 0 && tmpbuf[0] != '\0')
1866 if (tmpbufsize > 65536)
1868 g_warning (G_STRLOC "Maximum buffer size for g_date_strftime exceeded: giving up\n");
1869 g_free (locale_format);
1878 g_free (locale_format);
1880 convbuf = g_locale_to_utf8 (tmpbuf, tmplen, NULL, &convlen, &error);
1885 g_warning (G_STRLOC "Error converting results of strftime to UTF-8: %s\n", error->message);
1886 g_error_free (error);
1892 if (slen <= convlen)
1894 /* Ensure only whole characters are copied into the buffer.
1896 gchar *end = g_utf8_find_prev_char (convbuf, convbuf + slen);
1897 g_assert (end != NULL);
1898 convlen = end - convbuf;
1900 /* Return 0 because the buffer isn't large enough.
1907 memcpy (s, convbuf, convlen);