diff -r 000000000000 -r e4d67989cc36 glib/libglib/src/gdate.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/glib/libglib/src/gdate.c Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,1558 @@ +/* GLIB - Library of useful routines for C programming + * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald + * Portions copyright (c) 2006 Nokia Corporation. All rights reserved. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/* + * Modified by the GLib Team and others 1997-2000. See the AUTHORS + * file for a list of people on the GLib Team. See the ChangeLog + * files for a list of changes. These files are distributed with + * GLib at ftp://ftp.gtk.org/pub/gtk/. + */ + +/* + * MT safe + */ + +#include "config.h" + +#define DEBUG_MSG(x) /* */ +#ifdef G_ENABLE_DEBUG +/* #define DEBUG_MSG(args) g_message args ; */ +#endif + +#include "glib.h" + +#include +#include +#include +#include + +#include "galias.h" + +#ifdef __SYMBIAN32__ +#include +#endif /* __SYMBIAN32__ */ + +#if EMULATOR +#define g_thread_functions_for_glib_use (*_g_thread_functions_for_glib_use()) +#define g_thread_use_default_impl (*_g_thread_use_default_impl()) +#endif /* EMULATOR */ + +EXPORT_C GDate* +g_date_new (void) +{ + GDate *d = g_new0 (GDate, 1); /* happily, 0 is the invalid flag for everything. */ + + return d; +} + +EXPORT_C GDate* +g_date_new_dmy (GDateDay day, GDateMonth m, GDateYear y) +{ + GDate *d; + g_return_val_if_fail (g_date_valid_dmy (day, m, y), NULL); + + d = g_new (GDate, 1); + + d->julian = FALSE; + d->dmy = TRUE; + + d->month = m; + d->day = day; + d->year = y; + + g_assert (g_date_valid (d)); + + return d; +} + +EXPORT_C GDate* +g_date_new_julian (guint32 j) +{ + GDate *d; + g_return_val_if_fail (g_date_valid_julian (j), NULL); + d = g_new (GDate, 1); + + d->julian = TRUE; + d->dmy = FALSE; + + d->julian_days = j; + + g_assert (g_date_valid (d)); + + return d; +} + +EXPORT_C void +g_date_free (GDate *d) +{ + g_return_if_fail (d != NULL); + + g_free (d); +} + +EXPORT_C gboolean +g_date_valid (const GDate *d) +{ + g_return_val_if_fail (d != NULL, FALSE); + + return (d->julian || d->dmy); +} + +static const guint8 days_in_months[2][13] = +{ /* error, jan feb mar apr may jun jul aug sep oct nov dec */ + { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, + { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } /* leap year */ +}; + +static const guint16 days_in_year[2][14] = +{ /* 0, jan feb mar apr may jun jul aug sep oct nov dec */ + { 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, + { 0, 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } +}; + +EXPORT_C gboolean +g_date_valid_month (GDateMonth m) +{ + return ( (m > G_DATE_BAD_MONTH) && (m < 13) ); +} + +EXPORT_C gboolean +g_date_valid_year (GDateYear y) +{ + return ( y > G_DATE_BAD_YEAR ); +} + +EXPORT_C gboolean +g_date_valid_day (GDateDay d) +{ + return ( (d > G_DATE_BAD_DAY) && (d < 32) ); +} + +EXPORT_C gboolean +g_date_valid_weekday (GDateWeekday w) +{ + return ( (w > G_DATE_BAD_WEEKDAY) && (w < 8) ); +} + +EXPORT_C gboolean +g_date_valid_julian (guint32 j) +{ + return (j > G_DATE_BAD_JULIAN); +} + +EXPORT_C gboolean +g_date_valid_dmy (GDateDay d, + GDateMonth m, + GDateYear y) +{ + return ( (m > G_DATE_BAD_MONTH) && + (m < 13) && + (d > G_DATE_BAD_DAY) && + (y > G_DATE_BAD_YEAR) && /* must check before using g_date_is_leap_year */ + (d <= (g_date_is_leap_year (y) ? + days_in_months[1][m] : days_in_months[0][m])) ); +} + + +/* "Julian days" just means an absolute number of days, where Day 1 == + * Jan 1, Year 1 + */ +static void +g_date_update_julian (const GDate *const_d) +{ + GDate *d = (GDate *) const_d; + GDateYear year; + gint index; + + g_return_if_fail (d != NULL); + g_return_if_fail (d->dmy); + g_return_if_fail (!d->julian); + g_return_if_fail (g_date_valid_dmy (d->day, d->month, d->year)); + + /* What we actually do is: multiply years * 365 days in the year, + * add the number of years divided by 4, subtract the number of + * years divided by 100 and add the number of years divided by 400, + * which accounts for leap year stuff. Code from Steffen Beyer's + * DateCalc. + */ + + year = d->year - 1; /* we know d->year > 0 since it's valid */ + + d->julian_days = year * 365U; + d->julian_days += (year >>= 2); /* divide by 4 and add */ + d->julian_days -= (year /= 25); /* divides original # years by 100 */ + d->julian_days += year >> 2; /* divides by 4, which divides original by 400 */ + + index = g_date_is_leap_year (d->year) ? 1 : 0; + + d->julian_days += days_in_year[index][d->month] + d->day; + + g_return_if_fail (g_date_valid_julian (d->julian_days)); + + d->julian = TRUE; +} + +static void +g_date_update_dmy (const GDate *const_d) +{ + GDate *d = (GDate *) const_d; + GDateYear y; + GDateMonth m; + GDateDay day; + + guint32 A, B, C, D, E, M; + + g_return_if_fail (d != NULL); + g_return_if_fail (d->julian); + g_return_if_fail (!d->dmy); + g_return_if_fail (g_date_valid_julian (d->julian_days)); + + /* Formula taken from the Calendar FAQ; the formula was for the + * Julian Period which starts on 1 January 4713 BC, so we add + * 1,721,425 to the number of days before doing the formula. + * + * I'm sure this can be simplified for our 1 January 1 AD period + * start, but I can't figure out how to unpack the formula. + */ + + A = d->julian_days + 1721425 + 32045; + B = ( 4 *(A + 36524) )/ 146097 - 1; + C = A - (146097 * B)/4; + D = ( 4 * (C + 365) ) / 1461 - 1; + E = C - ((1461*D) / 4); + M = (5 * (E - 1) + 2)/153; + + m = M + 3 - (12*(M/10)); + day = E - (153*M + 2)/5; + y = 100 * B + D - 4800 + (M/10); + +#ifdef G_ENABLE_DEBUG + if (!g_date_valid_dmy (day, m, y)) + { + g_warning ("\nOOPS julian: %u computed dmy: %u %u %u\n", + d->julian_days, day, m, y); + } +#endif + + d->month = m; + d->day = day; + d->year = y; + + d->dmy = TRUE; +} + +EXPORT_C GDateWeekday +g_date_get_weekday (const GDate *d) +{ + g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_WEEKDAY); + + if (!d->julian) + { + g_date_update_julian (d); + } + g_return_val_if_fail (d->julian, G_DATE_BAD_WEEKDAY); + + return ((d->julian_days - 1) % 7) + 1; +} + +EXPORT_C GDateMonth +g_date_get_month (const GDate *d) +{ + g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_MONTH); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_val_if_fail (d->dmy, G_DATE_BAD_MONTH); + + return d->month; +} + +EXPORT_C GDateYear +g_date_get_year (const GDate *d) +{ + g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_YEAR); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_val_if_fail (d->dmy, G_DATE_BAD_YEAR); + + return d->year; +} + +EXPORT_C GDateDay +g_date_get_day (const GDate *d) +{ + g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_DAY); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_val_if_fail (d->dmy, G_DATE_BAD_DAY); + + return d->day; +} + +EXPORT_C guint32 +g_date_get_julian (const GDate *d) +{ + g_return_val_if_fail (g_date_valid (d), G_DATE_BAD_JULIAN); + + if (!d->julian) + { + g_date_update_julian (d); + } + g_return_val_if_fail (d->julian, G_DATE_BAD_JULIAN); + + return d->julian_days; +} + +EXPORT_C guint +g_date_get_day_of_year (const GDate *d) +{ + gint index; + + g_return_val_if_fail (g_date_valid (d), 0); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_val_if_fail (d->dmy, 0); + + index = g_date_is_leap_year (d->year) ? 1 : 0; + + return (days_in_year[index][d->month] + d->day); +} + +EXPORT_C guint +g_date_get_monday_week_of_year (const GDate *d) +{ + GDateWeekday wd; + guint day; + GDate first; + + g_return_val_if_fail (g_date_valid (d), 0); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_val_if_fail (d->dmy, 0); + + g_date_clear (&first, 1); + + g_date_set_dmy (&first, 1, 1, d->year); + + wd = g_date_get_weekday (&first) - 1; /* make Monday day 0 */ + day = g_date_get_day_of_year (d) - 1; + + return ((day + wd)/7U + (wd == 0 ? 1 : 0)); +} + +EXPORT_C guint +g_date_get_sunday_week_of_year (const GDate *d) +{ + GDateWeekday wd; + guint day; + GDate first; + + g_return_val_if_fail (g_date_valid (d), 0); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_val_if_fail (d->dmy, 0); + + g_date_clear (&first, 1); + + g_date_set_dmy (&first, 1, 1, d->year); + + wd = g_date_get_weekday (&first); + if (wd == 7) wd = 0; /* make Sunday day 0 */ + day = g_date_get_day_of_year (d) - 1; + + return ((day + wd)/7U + (wd == 0 ? 1 : 0)); +} + +/** + * g_date_get_iso8601_week_of_year: + * @date: a valid #GDate + * + * Returns the week of the year, where weeks are interpreted according + * to ISO 8601. + * + * Returns: ISO 8601 week number of the year. + * + * Since: 2.6 + **/ +EXPORT_C guint +g_date_get_iso8601_week_of_year (const GDate *d) +{ + guint j, d4, L, d1, w; + + g_return_val_if_fail (g_date_valid (d), 0); + + if (!d->julian) + g_date_update_julian (d); + g_return_val_if_fail (d->julian, 0); + + /* Formula taken from the Calendar FAQ; the formula was for the + * Julian Period which starts on 1 January 4713 BC, so we add + * 1,721,425 to the number of days before doing the formula. + */ + j = d->julian_days + 1721425; + d4 = (j + 31741 - (j % 7)) % 146097 % 36524 % 1461; + L = d4 / 1460; + d1 = ((d4 - L) % 365) + L; + w = d1 / 7 + 1; + + return w; +} + +EXPORT_C gint +g_date_days_between (const GDate *d1, + const GDate *d2) +{ + g_return_val_if_fail (g_date_valid (d1), 0); + g_return_val_if_fail (g_date_valid (d2), 0); + + return (gint)g_date_get_julian (d2) - (gint)g_date_get_julian (d1); +} + +EXPORT_C void +g_date_clear (GDate *d, guint ndates) +{ + g_return_if_fail (d != NULL); + g_return_if_fail (ndates != 0); + + memset (d, 0x0, ndates*sizeof (GDate)); +} + +#if EMULATOR + +PLS_MACRO(g_date_global,gdate,GStaticMutex) +PLS_ARRAY(long_month_names, gdate, gchar *) +PLS_ARRAY(short_month_names, gdate, gchar *) +PLS(current_locale,gdate, gchar *) +PLS_ARRAY(dmy_order, gdate, GDateDMY) +PLS(using_twodigit_years,gdate, gboolean) +PLS(locale_era_adjust,gdate, gint) + +#define g__g_date_global_lock (*FUNCTION_NAME_MACRO(g_date_global,gdate)()) +#define long_month_names (FUNCTION_NAME(long_month_names,gdate)()) +#define short_month_names (FUNCTION_NAME(short_month_names,gdate)()) +#define current_locale (*FUNCTION_NAME(current_locale ,gdate)()) +#define dmy_order (FUNCTION_NAME(dmy_order,gdate)()) +#define using_twodigit_years (*FUNCTION_NAME(using_twodigit_years ,gdate)()) +#define locale_era_adjust (*FUNCTION_NAME(locale_era_adjust,gdate)()) + +#else + +G_LOCK_DEFINE_STATIC (g_date_global); + +/* These are for the parser, output to the user should use * + * g_date_strftime () - this creates more never-freed memory to annoy + * all those memory debugger users. :-) + */ + +static gchar *long_month_names[13] = +{ + "Error", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL +}; + +static gchar *short_month_names[13] = +{ + "Error", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL +}; + +/* This tells us if we need to update the parse info */ +static gchar *current_locale = NULL; + +/* order of these in the current locale */ +static GDateDMY dmy_order[3] = +{ + G_DATE_DAY, G_DATE_MONTH, G_DATE_YEAR +}; + +/* It is impossible to enter a year between 1 AD and 99 AD with this + * in effect. + */ +static gboolean using_twodigit_years = FALSE; + +/* Adjustment of locale era to AD, non-zero means using locale era + */ +static gint locale_era_adjust = 0; + +#endif /* EMULATOR */ + +/* Where to chop two-digit years: i.e., for the 1930 default, numbers + * 29 and below are counted as in the year 2000, numbers 30 and above + * are counted as in the year 1900. + */ + +static const GDateYear twodigit_start_year = 1930; + +struct _GDateParseTokens { + gint num_ints; + gint n[3]; + guint month; +}; + +typedef struct _GDateParseTokens GDateParseTokens; + +#define NUM_LEN 10 + +/* HOLDS: g_date_global_lock */ +static void +g_date_fill_parse_tokens (const gchar *str, GDateParseTokens *pt) +{ + gchar num[4][NUM_LEN+1]; + gint i; + const guchar *s; + + /* We count 4, but store 3; so we can give an error + * if there are 4. + */ + num[0][0] = num[1][0] = num[2][0] = num[3][0] = '\0'; + + s = (const guchar *) str; + pt->num_ints = 0; + while (*s && pt->num_ints < 4) + { + + i = 0; + while (*s && g_ascii_isdigit (*s) && i < NUM_LEN) + { + num[pt->num_ints][i] = *s; + ++s; + ++i; + } + + if (i > 0) + { + num[pt->num_ints][i] = '\0'; + ++(pt->num_ints); + } + + if (*s == '\0') break; + + ++s; + } + + pt->n[0] = pt->num_ints > 0 ? atoi (num[0]) : 0; + pt->n[1] = pt->num_ints > 1 ? atoi (num[1]) : 0; + pt->n[2] = pt->num_ints > 2 ? atoi (num[2]) : 0; + + pt->month = G_DATE_BAD_MONTH; + + if (pt->num_ints < 3) + { + gchar *casefold; + gchar *normalized; + + casefold = g_utf8_casefold (str, -1); + normalized = g_utf8_normalize (casefold, -1, G_NORMALIZE_ALL); + g_free (casefold); + + i = 1; + while (i < 13) + { + if (long_month_names[i] != NULL) + { + const gchar *found = strstr (normalized, long_month_names[i]); + + if (found != NULL) + { + pt->month = i; + break; + } + } + + if (short_month_names[i] != NULL) + { + const gchar *found = strstr (normalized, short_month_names[i]); + + if (found != NULL) + { + pt->month = i; + break; + } + } + + ++i; + } + + g_free (normalized); + } +} + +/* HOLDS: g_date_global_lock */ +static void +g_date_prepare_to_parse (const gchar *str, GDateParseTokens *pt) +{ + const gchar *locale = setlocale (LC_TIME, NULL); + gboolean recompute_localeinfo = FALSE; + GDate d; + + g_return_if_fail (locale != NULL); /* should not happen */ + + g_date_clear (&d, 1); /* clear for scratch use */ + + if ( (current_locale == NULL) || (strcmp (locale, current_locale) != 0) ) + { + recompute_localeinfo = TRUE; /* Uh, there used to be a reason for the temporary */ + } + + if (recompute_localeinfo) + { + int i = 1; + GDateParseTokens testpt; + gchar buf[128]; + + g_free (current_locale); /* still works if current_locale == NULL */ + + current_locale = g_strdup (locale); + + while (i < 13) + { + gchar *casefold; + + g_date_set_dmy (&d, 1, i, 1); + + g_return_if_fail (g_date_valid (&d)); + + g_date_strftime (buf, 127, "%b", &d); + + casefold = g_utf8_casefold (buf, -1); + g_free (short_month_names[i]); + short_month_names[i] = g_utf8_normalize (casefold, -1, G_NORMALIZE_ALL); + g_free (casefold); + + g_date_strftime (buf, 127, "%B", &d); + casefold = g_utf8_casefold (buf, -1); + g_free (long_month_names[i]); + long_month_names[i] = g_utf8_normalize (casefold, -1, G_NORMALIZE_ALL); + g_free (casefold); + + ++i; + } + + /* Determine DMY order */ + + /* had to pick a random day - don't change this, some strftimes + * are broken on some days, and this one is good so far. */ + g_date_set_dmy (&d, 4, 7, 1976); + + g_date_strftime (buf, 127, "%x", &d); + + g_date_fill_parse_tokens (buf, &testpt); + + i = 0; + while (i < testpt.num_ints) + { + switch (testpt.n[i]) + { + case 7: + dmy_order[i] = G_DATE_MONTH; + break; + case 4: + dmy_order[i] = G_DATE_DAY; + break; + case 76: + using_twodigit_years = TRUE; /* FALL THRU */ + case 1976: + dmy_order[i] = G_DATE_YEAR; + break; + default: + /* assume locale era */ + locale_era_adjust = 1976 - testpt.n[i]; + dmy_order[i] = G_DATE_YEAR; + break; + } + ++i; + } + +#ifdef G_ENABLE_DEBUG + DEBUG_MSG (("**GDate prepared a new set of locale-specific parse rules.")); + i = 1; + while (i < 13) + { + DEBUG_MSG ((" %s %s", long_month_names[i], short_month_names[i])); + ++i; + } + if (using_twodigit_years) + DEBUG_MSG (("**Using twodigit years with cutoff year: %u", twodigit_start_year)); + { + gchar *strings[3]; + i = 0; + while (i < 3) + { + switch (dmy_order[i]) + { + case G_DATE_MONTH: + strings[i] = "Month"; + break; + case G_DATE_YEAR: + strings[i] = "Year"; + break; + case G_DATE_DAY: + strings[i] = "Day"; + break; + default: + strings[i] = NULL; + break; + } + ++i; + } + DEBUG_MSG (("**Order: %s, %s, %s", strings[0], strings[1], strings[2])); + DEBUG_MSG (("**Sample date in this locale: `%s'", buf)); + } +#endif + } + + g_date_fill_parse_tokens (str, pt); +} + +EXPORT_C void +g_date_set_parse (GDate *d, + const gchar *str) +{ + GDateParseTokens pt; + guint m = G_DATE_BAD_MONTH, day = G_DATE_BAD_DAY, y = G_DATE_BAD_YEAR; + + g_return_if_fail (d != NULL); + + /* set invalid */ + g_date_clear (d, 1); + + G_LOCK (g_date_global); + + g_date_prepare_to_parse (str, &pt); + + DEBUG_MSG (("Found %d ints, `%d' `%d' `%d' and written out month %d", + pt.num_ints, pt.n[0], pt.n[1], pt.n[2], pt.month)); + + + if (pt.num_ints == 4) + { + G_UNLOCK (g_date_global); + return; /* presumably a typo; bail out. */ + } + + if (pt.num_ints > 1) + { + int i = 0; + int j = 0; + + g_assert (pt.num_ints < 4); /* i.e., it is 2 or 3 */ + + while (i < pt.num_ints && j < 3) + { + switch (dmy_order[j]) + { + case G_DATE_MONTH: + { + if (pt.num_ints == 2 && pt.month != G_DATE_BAD_MONTH) + { + m = pt.month; + ++j; /* skip months, but don't skip this number */ + continue; + } + else + m = pt.n[i]; + } + break; + case G_DATE_DAY: + { + if (pt.num_ints == 2 && pt.month == G_DATE_BAD_MONTH) + { + day = 1; + ++j; /* skip days, since we may have month/year */ + continue; + } + day = pt.n[i]; + } + break; + case G_DATE_YEAR: + { + y = pt.n[i]; + + if (locale_era_adjust != 0) + { + y += locale_era_adjust; + } + else if (using_twodigit_years && y < 100) + { + guint two = twodigit_start_year % 100; + guint century = (twodigit_start_year / 100) * 100; + + if (y < two) + century += 100; + + y += century; + } + } + break; + default: + break; + } + + ++i; + ++j; + } + + + if (pt.num_ints == 3 && !g_date_valid_dmy (day, m, y)) + { + /* Try YYYY MM DD */ + y = pt.n[0]; + m = pt.n[1]; + day = pt.n[2]; + + if (using_twodigit_years && y < 100) + y = G_DATE_BAD_YEAR; /* avoids ambiguity */ + } + else if (pt.num_ints == 2) + { + if (m == G_DATE_BAD_MONTH && pt.month != G_DATE_BAD_MONTH) + { + m = pt.month; + } + } + } + else if (pt.num_ints == 1) + { + if (pt.month != G_DATE_BAD_MONTH) + { + /* Month name and year? */ + m = pt.month; + day = 1; + y = pt.n[0]; + } + else + { + /* Try yyyymmdd and yymmdd */ + + m = (pt.n[0]/100) % 100; + day = pt.n[0] % 100; + y = pt.n[0]/10000; + + /* FIXME move this into a separate function */ + if (using_twodigit_years && y < 100) + { + guint two = twodigit_start_year % 100; + guint century = (twodigit_start_year / 100) * 100; + + if (y < two) + century += 100; + + y += century; + } + } + } + + /* See if we got anything valid out of all this. */ + /* y < 8000 is to catch 19998 style typos; the library is OK up to 65535 or so */ + if (y < 8000 && g_date_valid_dmy (day, m, y)) + { + d->month = m; + d->day = day; + d->year = y; + d->dmy = TRUE; + } +#ifdef G_ENABLE_DEBUG + else + DEBUG_MSG (("Rejected DMY %u %u %u", day, m, y)); +#endif + G_UNLOCK (g_date_global); +} + +/** + * g_date_set_time_t: + * @date: a #GDate + * @timet: time_t value to set + * + * Sets the value of a date from a time_t value. + * + * To set the value of a date to the current day, you could write: + * + * g_date_set_time_t (date, time (NULL)); + * + * + * Since: 2.10 + */ +EXPORT_C void +g_date_set_time_t (GDate *date, + time_t timet) +{ + struct tm tm; + + g_return_if_fail (date != NULL); + +#ifdef HAVE_LOCALTIME_R + localtime_r (&timet, &tm); +#else + { + struct tm *ptm = localtime (&timet); + + if (ptm == NULL) + { + /* Happens at least in Microsoft's C library if you pass a + * negative time_t. Use 2000-01-01 as default date. + */ +#ifndef G_DISABLE_CHECKS + g_return_if_fail_warning (G_LOG_DOMAIN, "g_date_set_time", "ptm != NULL"); +#endif + + tm.tm_mon = 0; + tm.tm_mday = 1; + tm.tm_year = 100; + } + else + memcpy ((void *) &tm, (void *) ptm, sizeof(struct tm)); + } +#endif + + date->julian = FALSE; + + date->month = tm.tm_mon + 1; + date->day = tm.tm_mday; + date->year = tm.tm_year + 1900; + + g_return_if_fail (g_date_valid_dmy (date->day, date->month, date->year)); + + date->dmy = TRUE; +} + + +/** + * g_date_set_time: + * @date: a #GDate. + * @time_: #GTime value to set. + * + * Sets the value of a date from a #GTime value. + * + * @Deprecated:2.10: Use g_date_set_time_t() instead. + */ +#ifndef __SYMBIAN32__ +void +g_date_set_time (GDate *date, + GTime *time_) +#else +EXPORT_C void +g_date_set_time (GDate *date, + GTime time_) +#endif /* __SYMBIAN32__ */ +{ + g_date_set_time_t (date, (time_t) time_); +} + +/** + * g_date_set_time_val: + * @date: a #GDate + * @timeval: #GTimeVal value to set + * + * Sets the value of a date from a #GTimeVal value. Note that the + * @tv_usec member is ignored, because #GDate can't make use of the + * additional precision. + * + * Since: 2.10 + */ +EXPORT_C void +g_date_set_time_val (GDate *date, + GTimeVal *timeval) +{ + g_date_set_time_t (date, (time_t) timeval->tv_sec); +} + +EXPORT_C void +g_date_set_month (GDate *d, + GDateMonth m) +{ + g_return_if_fail (d != NULL); + g_return_if_fail (g_date_valid_month (m)); + + if (d->julian && !d->dmy) g_date_update_dmy(d); + d->julian = FALSE; + + d->month = m; + + if (g_date_valid_dmy (d->day, d->month, d->year)) + d->dmy = TRUE; + else + d->dmy = FALSE; +} + +EXPORT_C void +g_date_set_day (GDate *d, + GDateDay day) +{ + g_return_if_fail (d != NULL); + g_return_if_fail (g_date_valid_day (day)); + + if (d->julian && !d->dmy) g_date_update_dmy(d); + d->julian = FALSE; + + d->day = day; + + if (g_date_valid_dmy (d->day, d->month, d->year)) + d->dmy = TRUE; + else + d->dmy = FALSE; +} + +EXPORT_C void +g_date_set_year (GDate *d, + GDateYear y) +{ + g_return_if_fail (d != NULL); + g_return_if_fail (g_date_valid_year (y)); + + if (d->julian && !d->dmy) g_date_update_dmy(d); + d->julian = FALSE; + + d->year = y; + + if (g_date_valid_dmy (d->day, d->month, d->year)) + d->dmy = TRUE; + else + d->dmy = FALSE; +} + +EXPORT_C void +g_date_set_dmy (GDate *d, + GDateDay day, + GDateMonth m, + GDateYear y) +{ + g_return_if_fail (d != NULL); + g_return_if_fail (g_date_valid_dmy (day, m, y)); + + d->julian = FALSE; + + d->month = m; + d->day = day; + d->year = y; + + d->dmy = TRUE; +} + +EXPORT_C void +g_date_set_julian (GDate *d, guint32 j) +{ + g_return_if_fail (d != NULL); + g_return_if_fail (g_date_valid_julian (j)); + + d->julian_days = j; + d->julian = TRUE; + d->dmy = FALSE; +} + + +EXPORT_C gboolean +g_date_is_first_of_month (const GDate *d) +{ + g_return_val_if_fail (g_date_valid (d), FALSE); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_val_if_fail (d->dmy, FALSE); + + if (d->day == 1) return TRUE; + else return FALSE; +} + +EXPORT_C gboolean +g_date_is_last_of_month (const GDate *d) +{ + gint index; + + g_return_val_if_fail (g_date_valid (d), FALSE); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_val_if_fail (d->dmy, FALSE); + + index = g_date_is_leap_year (d->year) ? 1 : 0; + + if (d->day == days_in_months[index][d->month]) return TRUE; + else return FALSE; +} + +EXPORT_C void +g_date_add_days (GDate *d, guint ndays) +{ + g_return_if_fail (g_date_valid (d)); + + if (!d->julian) + { + g_date_update_julian (d); + } + g_return_if_fail (d->julian); + + d->julian_days += ndays; + d->dmy = FALSE; +} + +EXPORT_C void +g_date_subtract_days (GDate *d, guint ndays) +{ + g_return_if_fail (g_date_valid (d)); + + if (!d->julian) + { + g_date_update_julian (d); + } + g_return_if_fail (d->julian); + g_return_if_fail (d->julian_days > ndays); + + d->julian_days -= ndays; + d->dmy = FALSE; +} + +EXPORT_C void +g_date_add_months (GDate *d, + guint nmonths) +{ + guint years, months; + gint index; + + g_return_if_fail (g_date_valid (d)); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_if_fail (d->dmy); + + nmonths += d->month - 1; + + years = nmonths/12; + months = nmonths%12; + + d->month = months + 1; + d->year += years; + + index = g_date_is_leap_year (d->year) ? 1 : 0; + + if (d->day > days_in_months[index][d->month]) + d->day = days_in_months[index][d->month]; + + d->julian = FALSE; + + g_return_if_fail (g_date_valid (d)); +} + +EXPORT_C void +g_date_subtract_months (GDate *d, + guint nmonths) +{ + guint years, months; + gint index; + + g_return_if_fail (g_date_valid (d)); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_if_fail (d->dmy); + + years = nmonths/12; + months = nmonths%12; + + g_return_if_fail (d->year > years); + + d->year -= years; + + if (d->month > months) d->month -= months; + else + { + months -= d->month; + d->month = 12 - months; + d->year -= 1; + } + + index = g_date_is_leap_year (d->year) ? 1 : 0; + + if (d->day > days_in_months[index][d->month]) + d->day = days_in_months[index][d->month]; + + d->julian = FALSE; + + g_return_if_fail (g_date_valid (d)); +} + +EXPORT_C void +g_date_add_years (GDate *d, + guint nyears) +{ + g_return_if_fail (g_date_valid (d)); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_if_fail (d->dmy); + + d->year += nyears; + + if (d->month == 2 && d->day == 29) + { + if (!g_date_is_leap_year (d->year)) + { + d->day = 28; + } + } + + d->julian = FALSE; +} + +EXPORT_C void +g_date_subtract_years (GDate *d, + guint nyears) +{ + g_return_if_fail (g_date_valid (d)); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_if_fail (d->dmy); + g_return_if_fail (d->year > nyears); + + d->year -= nyears; + + if (d->month == 2 && d->day == 29) + { + if (!g_date_is_leap_year (d->year)) + { + d->day = 28; + } + } + + d->julian = FALSE; +} + + +EXPORT_C gboolean +g_date_is_leap_year (GDateYear year) +{ + g_return_val_if_fail (g_date_valid_year (year), FALSE); + + return ( (((year % 4) == 0) && ((year % 100) != 0)) || + (year % 400) == 0 ); +} + +EXPORT_C guint8 +g_date_get_days_in_month (GDateMonth month, + GDateYear year) +{ + gint index; + + g_return_val_if_fail (g_date_valid_year (year), 0); + g_return_val_if_fail (g_date_valid_month (month), 0); + + index = g_date_is_leap_year (year) ? 1 : 0; + + return days_in_months[index][month]; +} + +EXPORT_C guint8 +g_date_get_monday_weeks_in_year (GDateYear year) +{ + GDate d; + + g_return_val_if_fail (g_date_valid_year (year), 0); + + g_date_clear (&d, 1); + g_date_set_dmy (&d, 1, 1, year); + if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53; + g_date_set_dmy (&d, 31, 12, year); + if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53; + if (g_date_is_leap_year (year)) + { + g_date_set_dmy (&d, 2, 1, year); + if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53; + g_date_set_dmy (&d, 30, 12, year); + if (g_date_get_weekday (&d) == G_DATE_MONDAY) return 53; + } + return 52; +} + +EXPORT_C guint8 +g_date_get_sunday_weeks_in_year (GDateYear year) +{ + GDate d; + + g_return_val_if_fail (g_date_valid_year (year), 0); + + g_date_clear (&d, 1); + g_date_set_dmy (&d, 1, 1, year); + if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53; + g_date_set_dmy (&d, 31, 12, year); + if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53; + if (g_date_is_leap_year (year)) + { + g_date_set_dmy (&d, 2, 1, year); + if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53; + g_date_set_dmy (&d, 30, 12, year); + if (g_date_get_weekday (&d) == G_DATE_SUNDAY) return 53; + } + return 52; +} + +EXPORT_C gint +g_date_compare (const GDate *lhs, + const GDate *rhs) +{ + g_return_val_if_fail (lhs != NULL, 0); + g_return_val_if_fail (rhs != NULL, 0); + g_return_val_if_fail (g_date_valid (lhs), 0); + g_return_val_if_fail (g_date_valid (rhs), 0); + + /* Remember the self-comparison case! I think it works right now. */ + + while (TRUE) + { + + if (lhs->julian && rhs->julian) + { + if (lhs->julian_days < rhs->julian_days) return -1; + else if (lhs->julian_days > rhs->julian_days) return 1; + else return 0; + } + else if (lhs->dmy && rhs->dmy) + { + if (lhs->year < rhs->year) return -1; + else if (lhs->year > rhs->year) return 1; + else + { + if (lhs->month < rhs->month) return -1; + else if (lhs->month > rhs->month) return 1; + else + { + if (lhs->day < rhs->day) return -1; + else if (lhs->day > rhs->day) return 1; + else return 0; + } + + } + + } + else + { + if (!lhs->julian) g_date_update_julian (lhs); + if (!rhs->julian) g_date_update_julian (rhs); + g_return_val_if_fail (lhs->julian, 0); + g_return_val_if_fail (rhs->julian, 0); + } + + } + return 0; /* warnings */ +} + + +EXPORT_C void +g_date_to_struct_tm (const GDate *d, + struct tm *tm) +{ + GDateWeekday day; + + g_return_if_fail (g_date_valid (d)); + g_return_if_fail (tm != NULL); + + if (!d->dmy) + { + g_date_update_dmy (d); + } + g_return_if_fail (d->dmy); + + /* zero all the irrelevant fields to be sure they're valid */ + + /* On Linux and maybe other systems, there are weird non-POSIX + * fields on the end of struct tm that choke strftime if they + * contain garbage. So we need to 0 the entire struct, not just the + * fields we know to exist. + */ + + memset (tm, 0x0, sizeof (struct tm)); + + tm->tm_mday = d->day; + tm->tm_mon = d->month - 1; /* 0-11 goes in tm */ + tm->tm_year = ((int)d->year) - 1900; /* X/Open says tm_year can be negative */ + + day = g_date_get_weekday (d); + if (day == 7) day = 0; /* struct tm wants days since Sunday, so Sunday is 0 */ + + tm->tm_wday = (int)day; + + tm->tm_yday = g_date_get_day_of_year (d) - 1; /* 0 to 365 */ + tm->tm_isdst = -1; /* -1 means "information not available" */ +} + +EXPORT_C void +g_date_clamp (GDate *date, + const GDate *min_date, + const GDate *max_date) +{ + g_return_if_fail (g_date_valid (date)); + + if (min_date != NULL) + g_return_if_fail (g_date_valid (min_date)); + if (max_date != NULL) + g_return_if_fail (g_date_valid (max_date)); + if (min_date != NULL && max_date != NULL) + g_return_if_fail (g_date_compare (min_date, max_date) <= 0); + + if (min_date && g_date_compare (date, min_date) < 0) + *date = *min_date; + + if (max_date && g_date_compare (max_date, date) < 0) + *date = *max_date; +} + +EXPORT_C void +g_date_order (GDate *date1, + GDate *date2) +{ + g_return_if_fail (g_date_valid (date1)); + g_return_if_fail (g_date_valid (date2)); + + if (g_date_compare (date1, date2) > 0) + { + GDate tmp = *date1; + *date1 = *date2; + *date2 = tmp; + } +} + +EXPORT_C gsize +g_date_strftime (gchar *s, + gsize slen, + const gchar *format, + const GDate *d) +{ + struct tm tm; + gsize locale_format_len = 0; + gchar *locale_format; + gsize tmplen; + gchar *tmpbuf; + gsize tmpbufsize; + gsize convlen = 0; + gchar *convbuf; + GError *error = NULL; + gsize retval; + + g_return_val_if_fail (g_date_valid (d), 0); + g_return_val_if_fail (slen > 0, 0); + g_return_val_if_fail (format != 0, 0); + g_return_val_if_fail (s != 0, 0); + + g_date_to_struct_tm (d, &tm); + + locale_format = g_locale_from_utf8 (format, -1, NULL, &locale_format_len, &error); + + if (error) + { + g_warning (G_STRLOC "Error converting format to locale encoding: %s\n", error->message); + g_error_free (error); + + s[0] = '\0'; + return 0; + } + + tmpbufsize = MAX (128, locale_format_len * 2); + while (TRUE) + { + tmpbuf = g_malloc (tmpbufsize); + + /* Set the first byte to something other than '\0', to be able to + * recognize whether strftime actually failed or just returned "". + */ + tmpbuf[0] = '\1'; + tmplen = strftime (tmpbuf, tmpbufsize, locale_format, &tm); + + if (tmplen == 0 && tmpbuf[0] != '\0') + { + g_free (tmpbuf); + tmpbufsize *= 2; + + if (tmpbufsize > 65536) + { + g_warning (G_STRLOC "Maximum buffer size for g_date_strftime exceeded: giving up\n"); + g_free (locale_format); + + s[0] = '\0'; + return 0; + } + } + else + break; + } + g_free (locale_format); + + convbuf = g_locale_to_utf8 (tmpbuf, tmplen, NULL, &convlen, &error); + g_free (tmpbuf); + + if (error) + { + g_warning (G_STRLOC "Error converting results of strftime to UTF-8: %s\n", error->message); + g_error_free (error); + + s[0] = '\0'; + return 0; + } + + if (slen <= convlen) + { + /* Ensure only whole characters are copied into the buffer. + */ + gchar *end = g_utf8_find_prev_char (convbuf, convbuf + slen); + g_assert (end != NULL); + convlen = end - convbuf; + + /* Return 0 because the buffer isn't large enough. + */ + retval = 0; + } + else + retval = convlen; + + memcpy (s, convbuf, convlen); + s[convlen] = '\0'; + g_free (convbuf); + + return retval; +} + +#define __G_DATE_C__ +#include "galiasdef.c" +