mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-11-10 11:26:16 +01:00
855e230f31
2000-12-24 Ali Abdin <aliabdin@aucegypt.edu>
* Makefile.am, gcompat.h, glib.h: New gcompat.h header file
as recommended by Havoc.
* gdate.c, gdate.h, testgdate.c,
docs/reference/glib/glib-sections.txt,
docs/reference/glib/tmpl/date.sgml, tests/date-test.c: Rename some
of the gdate functions to use the '_get' in their name. Patch
reviewed by Havoc.
225 lines
8.9 KiB
C
225 lines
8.9 KiB
C
/* GLIB - Library of useful routines for C programming
|
|
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
|
|
*
|
|
* 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/.
|
|
*/
|
|
|
|
#ifndef __G_DATE_H__
|
|
#define __G_DATE_H__
|
|
|
|
#include <gquark.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/* GDate
|
|
*
|
|
* Date calculations (not time for now, to be resolved). These are a
|
|
* mutant combination of Steffen Beyer's DateCalc routines
|
|
* (http://www.perl.com/CPAN/authors/id/STBEY/) and Jon Trowbridge's
|
|
* date routines (written for in-house software). Written by Havoc
|
|
* Pennington <hp@pobox.com>
|
|
*/
|
|
|
|
typedef gint32 GTime;
|
|
typedef guint16 GDateYear;
|
|
typedef guint8 GDateDay; /* day of the month */
|
|
typedef struct _GDate GDate;
|
|
/* make struct tm known without having to include time.h */
|
|
struct tm;
|
|
|
|
/* enum used to specify order of appearance in parsed date strings */
|
|
typedef enum
|
|
{
|
|
G_DATE_DAY = 0,
|
|
G_DATE_MONTH = 1,
|
|
G_DATE_YEAR = 2
|
|
} GDateDMY;
|
|
|
|
/* actual week and month values */
|
|
typedef enum
|
|
{
|
|
G_DATE_BAD_WEEKDAY = 0,
|
|
G_DATE_MONDAY = 1,
|
|
G_DATE_TUESDAY = 2,
|
|
G_DATE_WEDNESDAY = 3,
|
|
G_DATE_THURSDAY = 4,
|
|
G_DATE_FRIDAY = 5,
|
|
G_DATE_SATURDAY = 6,
|
|
G_DATE_SUNDAY = 7
|
|
} GDateWeekday;
|
|
typedef enum
|
|
{
|
|
G_DATE_BAD_MONTH = 0,
|
|
G_DATE_JANUARY = 1,
|
|
G_DATE_FEBRUARY = 2,
|
|
G_DATE_MARCH = 3,
|
|
G_DATE_APRIL = 4,
|
|
G_DATE_MAY = 5,
|
|
G_DATE_JUNE = 6,
|
|
G_DATE_JULY = 7,
|
|
G_DATE_AUGUST = 8,
|
|
G_DATE_SEPTEMBER = 9,
|
|
G_DATE_OCTOBER = 10,
|
|
G_DATE_NOVEMBER = 11,
|
|
G_DATE_DECEMBER = 12
|
|
} GDateMonth;
|
|
|
|
#define G_DATE_BAD_JULIAN 0U
|
|
#define G_DATE_BAD_DAY 0U
|
|
#define G_DATE_BAD_YEAR 0U
|
|
|
|
/* Note: directly manipulating structs is generally a bad idea, but
|
|
* in this case it's an *incredibly* bad idea, because all or part
|
|
* of this struct can be invalid at any given time. Use the functions,
|
|
* or you will get hosed, I promise.
|
|
*/
|
|
struct _GDate
|
|
{
|
|
guint julian_days : 32; /* julian days representation - we use a
|
|
* bitfield hoping that 64 bit platforms
|
|
* will pack this whole struct in one big
|
|
* int
|
|
*/
|
|
|
|
guint julian : 1; /* julian is valid */
|
|
guint dmy : 1; /* dmy is valid */
|
|
|
|
/* DMY representation */
|
|
guint day : 6;
|
|
guint month : 4;
|
|
guint year : 16;
|
|
};
|
|
|
|
/* g_date_new() returns an invalid date, you then have to _set() stuff
|
|
* to get a usable object. You can also allocate a GDate statically,
|
|
* then call g_date_clear() to initialize.
|
|
*/
|
|
GDate* g_date_new (void);
|
|
GDate* g_date_new_dmy (GDateDay day,
|
|
GDateMonth month,
|
|
GDateYear year);
|
|
GDate* g_date_new_julian (guint32 julian_day);
|
|
void g_date_free (GDate *date);
|
|
|
|
/* check g_date_valid() after doing an operation that might fail, like
|
|
* _parse. Almost all g_date operations are undefined on invalid
|
|
* dates (the exceptions are the mutators, since you need those to
|
|
* return to validity).
|
|
*/
|
|
gboolean g_date_valid (GDate *date);
|
|
gboolean g_date_valid_day (GDateDay day) G_GNUC_CONST;
|
|
gboolean g_date_valid_month (GDateMonth month) G_GNUC_CONST;
|
|
gboolean g_date_valid_year (GDateYear year) G_GNUC_CONST;
|
|
gboolean g_date_valid_weekday (GDateWeekday weekday) G_GNUC_CONST;
|
|
gboolean g_date_valid_julian (guint32 julian_date) G_GNUC_CONST;
|
|
gboolean g_date_valid_dmy (GDateDay day,
|
|
GDateMonth month,
|
|
GDateYear year) G_GNUC_CONST;
|
|
|
|
GDateWeekday g_date_get_weekday (GDate *date);
|
|
GDateMonth g_date_get_month (GDate *date);
|
|
GDateYear g_date_get_year (GDate *date);
|
|
GDateDay g_date_get_day (GDate *date);
|
|
guint32 g_date_get_julian (GDate *date);
|
|
guint g_date_get_day_of_year (GDate *date);
|
|
/* First monday/sunday is the start of week 1; if we haven't reached
|
|
* that day, return 0. These are not ISO weeks of the year; that
|
|
* routine needs to be added.
|
|
* these functions return the number of weeks, starting on the
|
|
* corrsponding day
|
|
*/
|
|
guint g_date_get_monday_week_of_year (GDate *date);
|
|
guint g_date_get_sunday_week_of_year (GDate *date);
|
|
|
|
/* If you create a static date struct you need to clear it to get it
|
|
* in a sane state before use. You can clear a whole array at
|
|
* once with the ndates argument.
|
|
*/
|
|
void g_date_clear (GDate *date,
|
|
guint n_dates);
|
|
|
|
/* The parse routine is meant for dates typed in by a user, so it
|
|
* permits many formats but tries to catch common typos. If your data
|
|
* needs to be strictly validated, it is not an appropriate function.
|
|
*/
|
|
void g_date_set_parse (GDate *date,
|
|
const gchar *str);
|
|
void g_date_set_time (GDate *date,
|
|
GTime time);
|
|
void g_date_set_month (GDate *date,
|
|
GDateMonth month);
|
|
void g_date_set_day (GDate *date,
|
|
GDateDay day);
|
|
void g_date_set_year (GDate *date,
|
|
GDateYear year);
|
|
void g_date_set_dmy (GDate *date,
|
|
GDateDay day,
|
|
GDateMonth month,
|
|
GDateYear y);
|
|
void g_date_set_julian (GDate *date,
|
|
guint32 julian_date);
|
|
gboolean g_date_is_first_of_month (GDate *date);
|
|
gboolean g_date_is_last_of_month (GDate *date);
|
|
|
|
/* To go forward by some number of weeks just go forward weeks*7 days */
|
|
void g_date_add_days (GDate *date,
|
|
guint n_days);
|
|
void g_date_subtract_days (GDate *date,
|
|
guint n_days);
|
|
|
|
/* If you add/sub months while day > 28, the day might change */
|
|
void g_date_add_months (GDate *date,
|
|
guint n_months);
|
|
void g_date_subtract_months (GDate *date,
|
|
guint n_months);
|
|
|
|
/* If it's feb 29, changing years can move you to the 28th */
|
|
void g_date_add_years (GDate *date,
|
|
guint n_years);
|
|
void g_date_subtract_years (GDate *date,
|
|
guint n_years);
|
|
gboolean g_date_is_leap_year (GDateYear year) G_GNUC_CONST;
|
|
guint8 g_date_get_days_in_month (GDateMonth month,
|
|
GDateYear year) G_GNUC_CONST;
|
|
guint8 g_date_get_monday_weeks_in_year (GDateYear year) G_GNUC_CONST;
|
|
guint8 g_date_get_sunday_weeks_in_year (GDateYear year) G_GNUC_CONST;
|
|
|
|
/* qsort-friendly (with a cast...) */
|
|
gint g_date_compare (GDate *lhs,
|
|
GDate *rhs);
|
|
void g_date_to_struct_tm (GDate *date,
|
|
struct tm *tm);
|
|
|
|
/* Just like strftime() except you can only use date-related formats.
|
|
* Using a time format is undefined.
|
|
*/
|
|
gsize g_date_strftime (gchar *s,
|
|
gsize slen,
|
|
const gchar *format,
|
|
GDate *date);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __G_DATE_H__ */
|
|
|