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1998-11-30  Havoc Pennington  <hp@pobox.com>

* gdate.c: New file, implements calendrical calculations.

* glib.h: Added declarations for GDate module.
This commit is contained in:
Havoc Pennington 1998-12-01 20:24:32 +00:00 committed by Havoc Pennington
parent 958f33656a
commit a3e59c3ebf
14 changed files with 3010 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
1998-11-30 Havoc Pennington <hp@pobox.com>
* gdate.c: New file, implements calendrical calculations.
* glib.h: Added declarations for GDate module.
Mon Nov 30 07:12:10 1998 Tim Janik <timj@gtk.org>
* glib.h:

6
ChangeLog.pre-2-0
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@ -1,3 +1,9 @@
1998-11-30 Havoc Pennington <hp@pobox.com>
* gdate.c: New file, implements calendrical calculations.
* glib.h: Added declarations for GDate module.
Mon Nov 30 07:12:10 1998 Tim Janik <timj@gtk.org>
* glib.h:

6
ChangeLog.pre-2-10
View File

@ -1,3 +1,9 @@
1998-11-30 Havoc Pennington <hp@pobox.com>
* gdate.c: New file, implements calendrical calculations.
* glib.h: Added declarations for GDate module.
Mon Nov 30 07:12:10 1998 Tim Janik <timj@gtk.org>
* glib.h:

6
ChangeLog.pre-2-12
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@ -1,3 +1,9 @@
1998-11-30 Havoc Pennington <hp@pobox.com>
* gdate.c: New file, implements calendrical calculations.
* glib.h: Added declarations for GDate module.
Mon Nov 30 07:12:10 1998 Tim Janik <timj@gtk.org>
* glib.h:

6
ChangeLog.pre-2-2
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@ -1,3 +1,9 @@
1998-11-30 Havoc Pennington <hp@pobox.com>
* gdate.c: New file, implements calendrical calculations.
* glib.h: Added declarations for GDate module.
Mon Nov 30 07:12:10 1998 Tim Janik <timj@gtk.org>
* glib.h:

6
ChangeLog.pre-2-4
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@ -1,3 +1,9 @@
1998-11-30 Havoc Pennington <hp@pobox.com>
* gdate.c: New file, implements calendrical calculations.
* glib.h: Added declarations for GDate module.
Mon Nov 30 07:12:10 1998 Tim Janik <timj@gtk.org>
* glib.h:

6
ChangeLog.pre-2-6
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@ -1,3 +1,9 @@
1998-11-30 Havoc Pennington <hp@pobox.com>
* gdate.c: New file, implements calendrical calculations.
* glib.h: Added declarations for GDate module.
Mon Nov 30 07:12:10 1998 Tim Janik <timj@gtk.org>
* glib.h:

6
ChangeLog.pre-2-8
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@ -1,3 +1,9 @@
1998-11-30 Havoc Pennington <hp@pobox.com>
* gdate.c: New file, implements calendrical calculations.
* glib.h: Added declarations for GDate module.
Mon Nov 30 07:12:10 1998 Tim Janik <timj@gtk.org>
* glib.h:

1
Makefile.am
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@ -31,6 +31,7 @@ libglib_la_SOURCES = \
gcache.c \
gcompletion.c \
gdataset.c \
gdate.c \
gerror.c \
ghash.c \
ghook.c \

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gdate.c Normal file
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205
glib.h
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@ -2030,6 +2030,211 @@ GList* g_completion_complete (GCompletion* cmp,
void g_completion_free (GCompletion* cmp);
/* 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>
*/
#include <time.h>
/* this enum is used to specify order of appearance in parsed date
* strings
*/
typedef enum {
G_DATE_MONTH = 0,
G_DATE_DAY = 1,
G_DATE_YEAR = 2
} GDateMDY;
/* These other types specify the actual 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;
typedef guint16 GDateYear;
typedef guint8 GDateDay; /* day of the month */
#define G_DATE_BAD_JULIAN 0U
#define G_DATE_BAD_DAY 0U
#define G_DATE_BAD_YEAR 0U
typedef struct _GDate GDate;
/* 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 mdy : 1; /* mdy is valid */
/* MDY representation */
guint month : 4;
guint day : 6;
guint year : 16;
};
/* _new with no args 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_mdy (GDateMonth m,
GDateDay d,
GDateYear y);
GDate* g_date_new_julian (guint32 julian_day);
void g_date_free (GDate *d);
/* 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 *d);
gboolean g_date_valid_month (GDateMonth m);
gboolean g_date_valid_year (GDateYear y);
gboolean g_date_valid_day (GDateDay d);
gboolean g_date_valid_weekday (GDateWeekday w);
gboolean g_date_valid_julian (guint32 j);
gboolean g_date_valid_mdy (GDateMonth m,
GDateDay d,
GDateYear y);
GDateWeekday g_date_weekday (GDate *d);
GDateMonth g_date_month (GDate *d);
GDateYear g_date_year (GDate *d);
GDateDay g_date_day (GDate *d);
guint32 g_date_julian (GDate *d);
guint g_date_day_of_year (GDate *d);
/* 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 should be added.
*/
guint g_date_monday_week_of_year (GDate *d); /* # weeks, starting on Monday */
guint g_date_sunday_week_of_year (GDate *d); /* # weeks, starting on Sunday */
/* 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 *d,
guint ndates);
/* 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 *d,
const gchar *str);
void g_date_set_time (GDate *d,
time_t t);
void g_date_set_month (GDate *d,
GDateMonth m);
void g_date_set_day (GDate *d,
GDateDay day);
void g_date_set_year (GDate *d,
GDateYear y);
void g_date_set_mdy (GDate *d,
GDateMonth m,
GDateDay day,
GDateYear y);
void g_date_set_julian (GDate *d,
guint32 j);
gboolean g_date_is_first_of_month (GDate *d);
gboolean g_date_is_last_of_month (GDate *d);
/* To go forward by some number of weeks just go forward weeks*7 days */
void g_date_add_days (GDate *d,
guint ndays);
void g_date_subtract_days (GDate *d,
guint ndays);
/* If you add/sub months while day > 28, the day might change */
void g_date_add_months (GDate *d,
guint nmonths);
void g_date_subtract_months (GDate *d,
guint nmonths);
/* If it's feb 29, changing years can move you to the 28th */
void g_date_add_years (GDate *d,
guint nyears);
void g_date_subtract_years (GDate *d,
guint nyears);
gboolean g_date_is_leap_year (GDateYear year);
guint8 g_date_days_in_month (GDateMonth month,
GDateYear year);
guint8 g_date_monday_weeks_in_year (GDateYear year);
guint8 g_date_sunday_weeks_in_year (GDateYear year);
/* qsort-friendly (with a cast...) */
gint g_date_compare (GDate *lhs,
GDate *rhs);
void g_date_to_struct_tm (GDate *d,
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 *d);
/* GRelation: Indexed Relations. Imagine a really simple table in a
* database. Relations are not ordered. This data type is meant for
* maintaining a N-way mapping.

1
glib/Makefile.am
View File

@ -31,6 +31,7 @@ libglib_la_SOURCES = \
gcache.c \
gcompletion.c \
gdataset.c \
gdate.c \
gerror.c \
ghash.c \
ghook.c \

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205
glib/glib.h
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@ -2030,6 +2030,211 @@ GList* g_completion_complete (GCompletion* cmp,
void g_completion_free (GCompletion* cmp);
/* 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>
*/
#include <time.h>
/* this enum is used to specify order of appearance in parsed date
* strings
*/
typedef enum {
G_DATE_MONTH = 0,
G_DATE_DAY = 1,
G_DATE_YEAR = 2
} GDateMDY;
/* These other types specify the actual 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;
typedef guint16 GDateYear;
typedef guint8 GDateDay; /* day of the month */
#define G_DATE_BAD_JULIAN 0U
#define G_DATE_BAD_DAY 0U
#define G_DATE_BAD_YEAR 0U
typedef struct _GDate GDate;
/* 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 mdy : 1; /* mdy is valid */
/* MDY representation */
guint month : 4;
guint day : 6;
guint year : 16;
};
/* _new with no args 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_mdy (GDateMonth m,
GDateDay d,
GDateYear y);
GDate* g_date_new_julian (guint32 julian_day);
void g_date_free (GDate *d);
/* 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 *d);
gboolean g_date_valid_month (GDateMonth m);
gboolean g_date_valid_year (GDateYear y);
gboolean g_date_valid_day (GDateDay d);
gboolean g_date_valid_weekday (GDateWeekday w);
gboolean g_date_valid_julian (guint32 j);
gboolean g_date_valid_mdy (GDateMonth m,
GDateDay d,
GDateYear y);
GDateWeekday g_date_weekday (GDate *d);
GDateMonth g_date_month (GDate *d);
GDateYear g_date_year (GDate *d);
GDateDay g_date_day (GDate *d);
guint32 g_date_julian (GDate *d);
guint g_date_day_of_year (GDate *d);
/* 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 should be added.
*/
guint g_date_monday_week_of_year (GDate *d); /* # weeks, starting on Monday */
guint g_date_sunday_week_of_year (GDate *d); /* # weeks, starting on Sunday */
/* 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 *d,
guint ndates);
/* 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 *d,
const gchar *str);
void g_date_set_time (GDate *d,
time_t t);
void g_date_set_month (GDate *d,
GDateMonth m);
void g_date_set_day (GDate *d,
GDateDay day);
void g_date_set_year (GDate *d,
GDateYear y);
void g_date_set_mdy (GDate *d,
GDateMonth m,
GDateDay day,
GDateYear y);
void g_date_set_julian (GDate *d,
guint32 j);
gboolean g_date_is_first_of_month (GDate *d);
gboolean g_date_is_last_of_month (GDate *d);
/* To go forward by some number of weeks just go forward weeks*7 days */
void g_date_add_days (GDate *d,
guint ndays);
void g_date_subtract_days (GDate *d,
guint ndays);
/* If you add/sub months while day > 28, the day might change */
void g_date_add_months (GDate *d,
guint nmonths);
void g_date_subtract_months (GDate *d,
guint nmonths);
/* If it's feb 29, changing years can move you to the 28th */
void g_date_add_years (GDate *d,
guint nyears);
void g_date_subtract_years (GDate *d,
guint nyears);
gboolean g_date_is_leap_year (GDateYear year);
guint8 g_date_days_in_month (GDateMonth month,
GDateYear year);
guint8 g_date_monday_weeks_in_year (GDateYear year);
guint8 g_date_sunday_weeks_in_year (GDateYear year);
/* qsort-friendly (with a cast...) */
gint g_date_compare (GDate *lhs,
GDate *rhs);
void g_date_to_struct_tm (GDate *d,
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 *d);
/* GRelation: Indexed Relations. Imagine a really simple table in a
* database. Relations are not ordered. This data type is meant for
* maintaining a N-way mapping.