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A GLib style wrapper library around the Swiss Ephemeris library, created by Astrodienst.
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swe-glib/src/gswe-timestamp.c

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/* gswe-timestamp.c - Converter GObject between Gregorian calendar date and
* Julian day
*
* Copyright © 2013 Gergely Polonkai
*
* SWE-GLib is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* SWE-GLib 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include <math.h>
#include <glib.h>
#include <swephexp.h>
#include "swe-glib-private.h"
#include "swe-glib.h"
#include "gswe-timestamp.h"
/**
* SECTION:gswe-timestamp
* @short_description: conversion between Gregorian dates and Julian day values
* @title: GsweTimestamp
* @stability: Stable
* @include: swe-glib/swe-glib.h
*
* This object converts Gregorian dates to Julian days and vice versa.
*/
#define GSWE_TIMESTAMP_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE( \
(obj), \
GSWE_TYPE_TIMESTAMP, \
GsweTimestampPrivate \
))
struct _GsweTimestampPrivate {
gboolean instant_recalc;
GsweTimestampValidityFlags valid_dates;
gint gregorian_year;
gint gregorian_month;
gint gregorian_day;
gint gregorian_hour;
gint gregorian_minute;
gint gregorian_second;
gint gregorian_microsecond;
gdouble gregorian_timezone_offset;
gdouble julian_day;
gdouble julian_day_ut;
};
enum {
SIGNAL_CHANGED,
SIGNAL_LAST
};
enum {
PROP_0,
PROP_INSTANT_RECALC,
PROP_GREGORIAN_VALID,
PROP_GREGORIAN_YEAR,
PROP_GREGORIAN_MONTH,
PROP_GREGORIAN_DAY,
PROP_GREGORIAN_HOUR,
PROP_GREGORIAN_MINUTE,
PROP_GREGORIAN_SECOND,
PROP_GREGORIAN_MICROSECOND,
PROP_GREGORIAN_TIMEZONE_OFFSET,
PROP_JULIAN_DAY,
PROP_JULIAN_DAY_VALID,
PROP_COUNT
};
static guint gswe_timestamp_signals[SIGNAL_LAST] = { 0 };
static GParamSpec *gswe_timestamp_props[PROP_COUNT];
static void gswe_timestamp_dispose(
GObject *gobject);
static void gswe_timestamp_finalize(
GObject *gobject);
static void gswe_timestamp_set_property(
GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gswe_timestamp_get_property(
GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gswe_timestamp_calculate_all(
GsweTimestamp *timestamp,
GError **err);
static void gswe_timestamp_calculate_gregorian(
GsweTimestamp *timestamp,
GError **err);
static void gswe_timestamp_calculate_julian(
GsweTimestamp *timestamp,
GError **err);
G_DEFINE_TYPE(GsweTimestamp, gswe_timestamp, G_TYPE_OBJECT);
static void
gswe_timestamp_class_init(GsweTimestampClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
GDateTime *local_time = g_date_time_new_now_utc();
g_type_class_add_private(klass, sizeof(GsweTimestampPrivate));
gobject_class->dispose = gswe_timestamp_dispose;
gobject_class->finalize = gswe_timestamp_finalize;
gobject_class->set_property = gswe_timestamp_set_property;
gobject_class->get_property = gswe_timestamp_get_property;
/**
* GsweTimestamp::changed:
* @timestamp: the GsweTimestamp that receives the signal
*
* The ::changed signal is emitted each time the timestamp is changed
*/
gswe_timestamp_signals[SIGNAL_CHANGED] = g_signal_new(
"changed",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_FIRST,
0, NULL, NULL,
g_cclosure_marshal_generic, G_TYPE_NONE, 0);
/**
* GsweTimestamp:instant-recalc:
*
* If set to TRUE, recalculate timestamp values instantly, when changing a
* parameter (e.g. recalculate Julian date when changing Gregorian year).
* Otherwise, the values are recalculated only upon request (e.g. on
* calling gswe_timestamp_get_julian_day()).
*/
gswe_timestamp_props[PROP_INSTANT_RECALC] = g_param_spec_boolean(
"instant-recalc",
"Instant recalculation",
"Instantly recalculate values upon parameter change",
FALSE, G_PARAM_CONSTRUCT | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_INSTANT_RECALC,
gswe_timestamp_props[PROP_INSTANT_RECALC]
);
/**
* GsweTimestamp:gregorian-valid:
*
* If TRUE, the Gregorian value stored in the GsweTimestamp object is
* currently considered as valid, thus, no recalculation is needed.
* Otherwise, the Gregorian date components will be recalculated upon
* request.
*/
gswe_timestamp_props[PROP_GREGORIAN_VALID] = g_param_spec_boolean(
"gregorian-valid",
"Gregorian date is valid",
"TRUE if the Gregorian date components are considered as valid.",
TRUE, G_PARAM_READABLE
);
g_object_class_install_property(
gobject_class,
PROP_GREGORIAN_VALID,
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
/**
* GsweTimestamp:gregorian-year:
*
* The Gregorian year of the timestamp
*/
gswe_timestamp_props[PROP_GREGORIAN_YEAR] = g_param_spec_int(
"gregorian-year",
"Gregorian year",
"The year according to the Gregorian calendar",
G_MININT, G_MAXINT, g_date_time_get_year(local_time),
G_PARAM_CONSTRUCT | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_GREGORIAN_YEAR,
gswe_timestamp_props[PROP_GREGORIAN_YEAR]
);
/**
* GsweTimestamp:gregorian-month:
*
* The Gregorian month of the timestamp
*/
gswe_timestamp_props[PROP_GREGORIAN_MONTH] = g_param_spec_int(
"gregorian-month",
"Gregorian month",
"The month according to the Gregorian calendar",
1, 12, g_date_time_get_month(local_time),
G_PARAM_CONSTRUCT | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_GREGORIAN_MONTH,
gswe_timestamp_props[PROP_GREGORIAN_MONTH]
);
/**
* GsweTimestamp:gregorian-day:
*
* The Gregorian day of the timestamp
*/
gswe_timestamp_props[PROP_GREGORIAN_DAY] = g_param_spec_int(
"gregorian-day",
"Gregorian day",
"The day according to the Gregorian calendar",
1, 31, g_date_time_get_day_of_month(local_time),
G_PARAM_CONSTRUCT | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_GREGORIAN_DAY,
gswe_timestamp_props[PROP_GREGORIAN_DAY]
);
/**
* GsweTimestamp:gregorian-hour:
*
* The Gregorian hour of the timestamp
*/
gswe_timestamp_props[PROP_GREGORIAN_HOUR] = g_param_spec_int(
"gregorian-hour",
"Gregorian hour",
"The hour according to the Gregorian calendar",
0, 23, g_date_time_get_hour(local_time),
G_PARAM_CONSTRUCT | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_GREGORIAN_HOUR,
gswe_timestamp_props[PROP_GREGORIAN_HOUR]
);
/**
* GsweTimestamp:gregorian-minute:
*
* The Gregorian minute of the timestamp
*/
gswe_timestamp_props[PROP_GREGORIAN_MINUTE] = g_param_spec_int(
"gregorian-minute",
"Gregorian minute",
"The minute according to the Gregorian calendar",
0, 59, g_date_time_get_minute(local_time),
G_PARAM_CONSTRUCT | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_GREGORIAN_MINUTE,
gswe_timestamp_props[PROP_GREGORIAN_MINUTE]
);
/**
* GsweTimestamp:gregorian-second:
*
* The Gregorian second of the timestamp
*/
gswe_timestamp_props[PROP_GREGORIAN_SECOND] = g_param_spec_int(
"gregorian-second",
"Gregorian second",
"The second according to the Gregorian calendar",
0, 61, g_date_time_get_second(local_time),
G_PARAM_CONSTRUCT | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_GREGORIAN_SECOND,
gswe_timestamp_props[PROP_GREGORIAN_SECOND]
);
/**
* GsweTimestamp:gregorian-microsecond:
*
* The Gregorian microsecond of the timestamp
*/
gswe_timestamp_props[PROP_GREGORIAN_MICROSECOND] = g_param_spec_int(
"gregorian-microsecond",
"Gregorian microsecond",
"The microsecond according to the Gregorian calendar",
0, G_MAXINT, g_date_time_get_microsecond(local_time),
G_PARAM_CONSTRUCT | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_GREGORIAN_MICROSECOND,
gswe_timestamp_props[PROP_GREGORIAN_MICROSECOND]
);
/**
* GsweTimestamp:gregorian-timezone-offset:
*
* The time zone offset in hours, relative to UTC
*/
gswe_timestamp_props[PROP_GREGORIAN_TIMEZONE_OFFSET] = g_param_spec_double(
"gregorian-timezone-offset",
"Gregorian timezone offset",
"The offset relative to UTC in the Gregorian calendar",
-24.0, 24.0,
0.0,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_GREGORIAN_TIMEZONE_OFFSET,
gswe_timestamp_props[PROP_GREGORIAN_TIMEZONE_OFFSET]
);
/**
* GsweTimestamp:julian-day:
*
* The Julian Day represented by #GsweTimestamp
*/
gswe_timestamp_props[PROP_JULIAN_DAY] = g_param_spec_double(
"julian-day",
"Julian Day",
"The Julian Day represented by this object",
-G_MAXDOUBLE, G_MAXDOUBLE, 0,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE
);
g_object_class_install_property(
gobject_class,
PROP_JULIAN_DAY,
gswe_timestamp_props[PROP_JULIAN_DAY]
);
/**
* GsweTimestamp:julian-day-valid:
*
* If TRUE, the Julian day value stored in the GsweTimestamp object is
* currently considered as valid, thus, no recalculation is needed.
* Otherwise, the Julian day components will be recalculated upon request.
*/
gswe_timestamp_props[PROP_JULIAN_DAY_VALID] = g_param_spec_boolean(
"julian-day-valid",
"Julian day is valid",
"TRUE if the Julian day components are considered as valid.",
TRUE, G_PARAM_READABLE
);
g_object_class_install_property(
gobject_class,
PROP_JULIAN_DAY_VALID,
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
g_date_time_unref(local_time);
}
static void
gswe_timestamp_emit_changed(GsweTimestamp *timestamp)
{
g_signal_emit(timestamp, gswe_timestamp_signals[SIGNAL_CHANGED], 0);
}
void
gswe_timestamp_init(GsweTimestamp *self)
{
self->priv = GSWE_TIMESTAMP_GET_PRIVATE(self);
}
static void
gswe_timestamp_dispose(GObject *gobject)
{
G_OBJECT_CLASS(gswe_timestamp_parent_class)->dispose(gobject);
}
static void
gswe_timestamp_finalize(GObject *gobject)
{
G_OBJECT_CLASS(gswe_timestamp_parent_class)->finalize(gobject);
}
static void
gswe_timestamp_set_property(GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GsweTimestamp *timestamp = GSWE_TIMESTAMP(object);
switch (prop_id) {
case PROP_INSTANT_RECALC:
timestamp->priv->instant_recalc = g_value_get_boolean(value);
if (timestamp->priv->instant_recalc) {
gswe_timestamp_calculate_all(timestamp, NULL);
}
break;
case PROP_GREGORIAN_YEAR:
gswe_timestamp_set_gregorian_year(
timestamp,
g_value_get_int(value),
NULL
);
break;
case PROP_GREGORIAN_MONTH:
gswe_timestamp_set_gregorian_month(
timestamp,
g_value_get_int(value),
NULL
);
break;
case PROP_GREGORIAN_DAY:
gswe_timestamp_set_gregorian_day(
timestamp,
g_value_get_int(value),
NULL
);
break;
case PROP_GREGORIAN_HOUR:
gswe_timestamp_set_gregorian_hour(
timestamp,
g_value_get_int(value),
NULL
);
break;
case PROP_GREGORIAN_MINUTE:
gswe_timestamp_set_gregorian_minute(
timestamp,
g_value_get_int(value),
NULL
);
break;
case PROP_GREGORIAN_SECOND:
gswe_timestamp_set_gregorian_second(
timestamp,
g_value_get_int(value),
NULL
);
break;
case PROP_GREGORIAN_MICROSECOND:
gswe_timestamp_set_gregorian_microsecond(
timestamp,
g_value_get_int(value),
NULL
);
break;
case PROP_GREGORIAN_TIMEZONE_OFFSET:
gswe_timestamp_set_gregorian_timezone(
timestamp,
g_value_get_double(value),
NULL
);
break;
case PROP_JULIAN_DAY:
gswe_timestamp_set_julian_day_et(
timestamp,
g_value_get_double(value),
NULL
);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gswe_timestamp_get_property(
GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GsweTimestamp *timestamp = GSWE_TIMESTAMP(object);
switch (prop_id) {
case PROP_INSTANT_RECALC:
g_value_set_boolean(value, timestamp->priv->instant_recalc);
break;
case PROP_GREGORIAN_VALID:
g_value_set_boolean(
value,
((timestamp->priv->valid_dates & GSWE_VALID_GREGORIAN)
== GSWE_VALID_GREGORIAN)
);
break;
case PROP_GREGORIAN_YEAR:
gswe_timestamp_calculate_gregorian(timestamp, NULL);
g_value_set_int(value, timestamp->priv->gregorian_year);
break;
case PROP_GREGORIAN_MONTH:
gswe_timestamp_calculate_gregorian(timestamp, NULL);
g_value_set_int(value, timestamp->priv->gregorian_month);
break;
case PROP_GREGORIAN_DAY:
gswe_timestamp_calculate_gregorian(timestamp, NULL);
g_value_set_int(value, timestamp->priv->gregorian_day);
break;
case PROP_GREGORIAN_HOUR:
gswe_timestamp_calculate_gregorian(timestamp, NULL);
g_value_set_int(value, timestamp->priv->gregorian_hour);
break;
case PROP_GREGORIAN_MINUTE:
gswe_timestamp_calculate_gregorian(timestamp, NULL);
g_value_set_int(value, timestamp->priv->gregorian_minute);
break;
case PROP_GREGORIAN_SECOND:
gswe_timestamp_calculate_gregorian(timestamp, NULL);
g_value_set_int(value, timestamp->priv->gregorian_second);
break;
case PROP_GREGORIAN_MICROSECOND:
gswe_timestamp_calculate_gregorian(timestamp, NULL);
g_value_set_int(value, timestamp->priv->gregorian_microsecond);
break;
case PROP_GREGORIAN_TIMEZONE_OFFSET:
g_value_set_double(
value,
timestamp->priv->gregorian_timezone_offset);
break;
case PROP_JULIAN_DAY:
g_value_set_double(
value,
timestamp->priv->julian_day
);
break;
case PROP_JULIAN_DAY_VALID:
g_value_set_boolean(
value,
((timestamp->priv->valid_dates & GSWE_VALID_JULIAN_DAY)
== GSWE_VALID_JULIAN_DAY)
);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gswe_timestamp_calculate_all(GsweTimestamp *timestamp, GError **err)
{
if ((timestamp->priv->valid_dates & GSWE_VALID_JULIAN_DAY) != GSWE_VALID_JULIAN_DAY) {
gswe_timestamp_calculate_julian(timestamp, err);
}
if ((timestamp->priv->valid_dates & GSWE_VALID_GREGORIAN) != GSWE_VALID_GREGORIAN) {
gswe_timestamp_calculate_gregorian(timestamp, err);
}
}
static void
gswe_timestamp_calculate_gregorian(GsweTimestamp *timestamp, GError **err)
{
gint utc_year,
utc_month,
utc_day,
utc_hour,
utc_minute;
gdouble utc_second,
local_second;
if ((timestamp->priv->valid_dates & GSWE_VALID_GREGORIAN) == GSWE_VALID_GREGORIAN) {
return;
}
if (timestamp->priv->valid_dates == 0) {
g_set_error(
err,
GSWE_ERROR,
GSWE_ERROR_NO_VALID_VALUE,
"This timestamp object holds no valid values"
);
return;
}
swe_jdet_to_utc(
timestamp->priv->julian_day,
SE_GREG_CAL,
&utc_year, &utc_month, &utc_day,
&utc_hour, &utc_minute, &utc_second
);
swe_utc_time_zone(
utc_year, utc_month, utc_day,
utc_hour, utc_minute, utc_second,
0 - timestamp->priv->gregorian_timezone_offset,
&timestamp->priv->gregorian_year,
&timestamp->priv->gregorian_month,
&timestamp->priv->gregorian_day,
&timestamp->priv->gregorian_hour,
&timestamp->priv->gregorian_minute,
&local_second
);
timestamp->priv->gregorian_second = floor(local_second);
timestamp->priv->gregorian_microsecond = (
local_second - floor(local_second))
* 1000;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_YEAR]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_MONTH]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_DAY]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_HOUR]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_MINUTE]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_SECOND]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_MICROSECOND]
);
}
/**
* gswe_timestamp_set_instant_recalc:
* @timestamp: a GsweTimestamp
* @instant_recalc: the new value
* @err: a #GError
*
* Sets the value of the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property. For
* details, see the property's description. @err is populated with calculation
* errors if @instant_recalc is TRUE and a calculation error happens.
*/
void
gswe_timestamp_set_instant_recalc(
GsweTimestamp *timestamp,
gboolean instant_recalc,
GError **err)
{
timestamp->priv->instant_recalc = instant_recalc;
if (instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_INSTANT_RECALC]
);
}
/**
* gswe_timestamp_get_instant_recalc:
* @timestamp: a GsweTimestamp
*
* Gets the value of the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property. For
* details, see the property's description.
*/
gboolean
gswe_timestamp_get_instant_recalc(GsweTimestamp *timestamp)
{
return timestamp->priv->instant_recalc;
}
/**
* gswe_timestamp_set_gregorian_full:
* @timestamp: a GsweTimestamp
* @year: the new Gregorian year
* @month: the new Gregorian month
* @day: the new Gregorian day
* @hour: the new hour value
* @minute: the new minute value
* @second: the new second value
* @microsecond: the new microsecond value
* @time_zone_offset: the time zone offset, in hours
* @err: a #GError
*
* Sets the Gregorian date of @timestamp. @err is populated with calculation
* errors if the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property is
* TRUE
*/
void
gswe_timestamp_set_gregorian_full(
GsweTimestamp *timestamp,
gint year, gint month, gint day,
gint hour, gint minute, gint second, gint microsecond,
gdouble time_zone_offset,
GError **err)
{
gboolean changed = FALSE;
if (timestamp->priv->gregorian_year != year) {
timestamp->priv->gregorian_year = year;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_YEAR]
);
changed = TRUE;
}
if (timestamp->priv->gregorian_month != month) {
timestamp->priv->gregorian_month = month;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_MONTH]
);
changed = TRUE;
}
if (timestamp->priv->gregorian_day != day) {
timestamp->priv->gregorian_day = day;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_DAY]
);
changed = TRUE;
}
if (timestamp->priv->gregorian_hour != hour) {
timestamp->priv->gregorian_hour = hour;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_HOUR]
);
changed = TRUE;
}
if (timestamp->priv->gregorian_minute != minute) {
timestamp->priv->gregorian_minute = minute;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_MINUTE]
);
changed = TRUE;
}
if (timestamp->priv->gregorian_second != second) {
timestamp->priv->gregorian_second = second;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_SECOND]
);
changed = TRUE;
}
if (timestamp->priv->gregorian_microsecond != microsecond) {
timestamp->priv->gregorian_microsecond = microsecond;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_MICROSECOND]
);
changed = TRUE;
}
if (timestamp->priv->gregorian_timezone_offset != time_zone_offset) {
timestamp->priv->gregorian_timezone_offset = time_zone_offset;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_TIMEZONE_OFFSET]
);
changed = TRUE;
}
if (changed) {
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
}
/**
* gswe_timestamp_set_gregorian_year:
* @timestamp: a GsweTimestamp
* @gregorian_year: the new Gregorian year
* @err: a #GError
*
* Sets the Gregorian year of @timestamp. @err is populated with calculation
* errors if the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property is
* TRUE
*/
void
gswe_timestamp_set_gregorian_year(
GsweTimestamp *timestamp,
gint gregorian_year,
GError **err)
{
if (timestamp->priv->gregorian_year == gregorian_year) {
return;
}
timestamp->priv->gregorian_year = gregorian_year;
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_YEAR]
);
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
/**
* gswe_timestamp_get_gregorian_year:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Returns the Gregorian year of @timestamp.
*
* Returns: the year part of @timestamp's Gregorian Date value.
*/
gint
gswe_timestamp_get_gregorian_year(GsweTimestamp *timestamp, GError **err)
{
gswe_timestamp_calculate_gregorian(timestamp, err);
return timestamp->priv->gregorian_year;
}
/**
* gswe_timestamp_set_gregorian_month:
* @timestamp: a GsweTimestamp
* @gregorian_month: the new Gregorian month
* @err: a #GError
*
* Sets the Gregorian month of @timestamp. @err is populated with calculation
* errors if the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property is
* TRUE
*/
void
gswe_timestamp_set_gregorian_month(
GsweTimestamp *timestamp,
gint gregorian_month,
GError **err)
{
if (timestamp->priv->gregorian_month == gregorian_month) {
return;
}
timestamp->priv->gregorian_month = gregorian_month;
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_MONTH]
);
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
/**
* gswe_timestamp_get_gregorian_month:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Returns the Gregorian month of @timestamp.
*
* Returns: the month part of @timestamp's Gregorian Date value.
*/
gint
gswe_timestamp_get_gregorian_month(GsweTimestamp *timestamp, GError **err)
{
gswe_timestamp_calculate_gregorian(timestamp, err);
return timestamp->priv->gregorian_month;
}
/**
* gswe_timestamp_set_gregorian_day:
* @timestamp: a GsweTimestamp
* @gregorian_day: the new Gregorian day
* @err: a #GError
*
* Sets the Gregorian day of @timestamp. @err is populated with calculation
* errors if the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property is
* TRUE
*/
void
gswe_timestamp_set_gregorian_day(
GsweTimestamp *timestamp,
gint gregorian_day,
GError **err)
{
if (timestamp->priv->gregorian_day == gregorian_day) {
return;
}
timestamp->priv->gregorian_day = gregorian_day;
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_DAY]
);
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
/**
* gswe_timestamp_get_gregorian_day:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Returns the Gregorian day of @timestamp.
*
* Returns: the day part of @timestamp's Gregorian Date value.
*/
gint
gswe_timestamp_get_gregorian_day(GsweTimestamp *timestamp, GError **err)
{
gswe_timestamp_calculate_gregorian(timestamp, err);
return timestamp->priv->gregorian_day;
}
/**
* gswe_timestamp_set_gregorian_hour:
* @timestamp: a GsweTimestamp
* @gregorian_hour: the new hour value
* @err: a #GError
*
* Sets the hour value of @timestamp, which may be modified by the time zone.
* @err is populated with calculation errors if the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property is
* TRUE
*/
void
gswe_timestamp_set_gregorian_hour(
GsweTimestamp *timestamp,
gint gregorian_hour,
GError **err)
{
if (timestamp->priv->gregorian_hour == gregorian_hour) {
return;
}
timestamp->priv->gregorian_hour = gregorian_hour;
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_HOUR]
);
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
/**
* gswe_timestamp_get_gregorian_hour:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Returns the hour of @timestamp.
*
* Returns: the hour part of @timestamp's Gregorian Date value.
*/
gint
gswe_timestamp_get_gregorian_hour(GsweTimestamp *timestamp, GError **err)
{
gswe_timestamp_calculate_gregorian(timestamp, err);
return timestamp->priv->gregorian_hour;
}
/**
* gswe_timestamp_set_gregorian_minute:
* @timestamp: a GsweTimestamp
* @gregorian_minute: the new minute value
* @err: a #GError
*
* Sets the minute value of @timestamp, which may be modified by the timezone.
* @err is populated with calculation errors if the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property is
* TRUE
*/
void
gswe_timestamp_set_gregorian_minute(
GsweTimestamp *timestamp,
gint gregorian_minute,
GError **err)
{
if (timestamp->priv->gregorian_minute == gregorian_minute) {
return;
}
timestamp->priv->gregorian_minute = gregorian_minute;
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_MINUTE]
);
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
/**
* gswe_timestamp_get_gregorian_minute:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Returns the minute of @timestamp.
*
* Returns: the minute part of @timestamp's Gregorian Date value.
*/
gint
gswe_timestamp_get_gregorian_minute(GsweTimestamp *timestamp, GError **err)
{
gswe_timestamp_calculate_gregorian(timestamp, err);
return timestamp->priv->gregorian_minute;
}
/**
* gswe_timestamp_set_gregorian_second:
* @timestamp: a GsweTimestamp
* @gregorian_second: the new second value
* @err: a #GError
*
* Sets the second value of @timestamp, which may be modified by the timezone.
* @err is populated with calculation errors if the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property is
* TRUE.
*/
void
gswe_timestamp_set_gregorian_second(
GsweTimestamp *timestamp,
gint gregorian_second,
GError **err)
{
if (timestamp->priv->gregorian_second == gregorian_second) {
return;
}
timestamp->priv->gregorian_second = gregorian_second;
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_SECOND]
);
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
/**
* gswe_timestamp_get_gregorian_second:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Returns the second of @timestamp.
*
* Returns: the second part of @timestamp's Gregorian Date value.
*/
gint
gswe_timestamp_get_gregorian_second(GsweTimestamp *timestamp, GError **err)
{
gswe_timestamp_calculate_gregorian(timestamp, err);
return timestamp->priv->gregorian_second;
}
/**
* gswe_timestamp_set_gregorian_microsecond:
* @timestamp: a GsweTimestamp
* @gregorian_microsecond: the new microsecond value
* @err: a #GError
*
* Sets the microsecond value of @timestamp. @err is populated with calculation
* errors if the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property is
* TRUE
*/
void
gswe_timestamp_set_gregorian_microsecond(
GsweTimestamp *timestamp,
gint gregorian_microsecond,
GError **err)
{
if (timestamp->priv->gregorian_microsecond == gregorian_microsecond) {
return;
}
timestamp->priv->gregorian_microsecond = gregorian_microsecond;
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_MICROSECOND]
);
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
/**
* gswe_timestamp_get_gregorian_microsecond:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Returns the microsecond of @timestamp.
*
* Returns: the microsecond part of @timestamp's Gregorian Date value.
*/
gint
gswe_timestamp_get_gregorian_microsecond(GsweTimestamp *timestamp, GError **err)
{
gswe_timestamp_calculate_gregorian(timestamp, err);
return timestamp->priv->gregorian_microsecond;
}
/**
* gswe_timestamp_set_gregorian_timezone:
* @timestamp: a GsweTimestamp
* @gregorian_timezone_offset: the offset of the desired time zone, in hours
* @err: a #GError
*
* Sets the time zone used in Gregorian date calculations. @err is populated
* with calculation errors if the <link
* linkend="GsweTimestamp--instant-recalc">instant-recalc</link> property's
* value is TRUE and a calculation error happens.
*/
void
gswe_timestamp_set_gregorian_timezone(
GsweTimestamp *timestamp,
gdouble gregorian_timezone_offset,
GError **err)
{
if (timestamp->priv->gregorian_timezone_offset == gregorian_timezone_offset) {
return;
}
gswe_timestamp_calculate_julian(timestamp, NULL);
timestamp->priv->gregorian_timezone_offset = gregorian_timezone_offset;
timestamp->priv->valid_dates &= ~GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_TIMEZONE_OFFSET]
);
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
}
/**
* gswe_timestamp_get_gregorian_timezone:
* @timestamp: a GsweTimestamp
*
* Gets the time zone used in Gregorian date calculations.
*/
gdouble
gswe_timestamp_get_gregorian_timezone(GsweTimestamp *timestamp)
{
return timestamp->priv->gregorian_timezone_offset;
}
static void
gswe_timestamp_calculate_julian(GsweTimestamp *timestamp, GError **err)
{
gint utc_year,
utc_month,
utc_day,
utc_hour,
utc_minute,
retval;
gdouble utc_second,
dret[2];
gchar serr[AS_MAXCH];
if ((timestamp->priv->valid_dates & GSWE_VALID_JULIAN_DAY) == GSWE_VALID_JULIAN_DAY) {
return;
}
if (timestamp->priv->valid_dates == 0) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_NO_VALID_VALUE,
"This timestamp object holds no valid values"
);
return;
}
swe_utc_time_zone(
timestamp->priv->gregorian_year,
timestamp->priv->gregorian_month,
timestamp->priv->gregorian_day,
timestamp->priv->gregorian_hour,
timestamp->priv->gregorian_minute,
timestamp->priv->gregorian_second
+ timestamp->priv->gregorian_microsecond / 1000.0,
timestamp->priv->gregorian_timezone_offset,
&utc_year, &utc_month, &utc_day,
&utc_hour, &utc_minute, &utc_second
);
if (
(retval = swe_utc_to_jd(
utc_year, utc_month, utc_day,
utc_hour, utc_minute, utc_second,
SE_GREG_CAL, dret, serr)
) == ERR) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_SWE_FATAL,
"Swiss Ephemeris error: %s", serr
);
} else {
timestamp->priv->julian_day = dret[0];
timestamp->priv->julian_day_ut = dret[1];
timestamp->priv->valid_dates |= GSWE_VALID_JULIAN_DAY;
}
}
/**
* gswe_timestamp_set_julian_day:
* @timestamp: a #GsweTimestamp
* @julian_day: The Julian day number, with hours included as fractions
*
* Deprecated: This function is deprecated in version 2.1. In newly written
* code use gswe_timestamp_set_julian_day_et()
*/
void
gswe_timestamp_set_julian_day(GsweTimestamp *timestamp, gdouble julian_day)
{
gswe_timestamp_set_julian_day_et(timestamp, julian_day, NULL);
}
/**
* gswe_timestamp_get_julian_day:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Deprecated: This function is deprecated in version 2.1. In newly written
* code use gswe_timestamp_get_julian_day_et()
*/
gdouble
gswe_timestamp_get_julian_day(GsweTimestamp *timestamp, GError **err)
{
return gswe_timestamp_get_julian_day_et(timestamp, err);
}
/**
* gswe_timestamp_set_julian_day_et:
* @timestamp: A GsweTimestamp
* @julian_day: The Julian day number, with hours included as fractions
* @err: a #GError
*
* Sets the Julian day value of the timestamp. The Gregorian date will be
* calculated as requested. Given Julian day must be given in Ephemeris Time
* (ET). See gswe_timestamp_set_julian_day_ut() for Universal Time (UT)
* version.
*
* Since: 2.1
*/
void
gswe_timestamp_set_julian_day_et(
GsweTimestamp *timestamp,
gdouble julian_day,
GError **err)
{
GError *err_local = NULL;
timestamp->priv->julian_day = julian_day;
timestamp->priv->valid_dates = GSWE_VALID_JULIAN_DAY;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
// to get exact UT value, we must calculate gregorian date, and
// reverse-engineer the UT value from that. This is an overkill, but libswe
// doesn’t provide an API for that.
gswe_timestamp_calculate_gregorian(timestamp, &err_local);
if (err_local) {
if (err) {
*err = err_local;
}
return;
}
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
gswe_timestamp_calculate_julian(timestamp, &err_local);
if (err_local) {
if (err) {
*err = err_local;
}
return;
}
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
/**
* gswe_timestamp_get_julian_day_et:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Gets the Julian day value of @timestamp, Ephemeris Time (ET). For Universal
* Time (UT), see gswe_timestamp_get_julian_day_ut(). @err is populated if the
* calculations raises an error.
*
* Since: 2.1
*/
gdouble
gswe_timestamp_get_julian_day_et(GsweTimestamp *timestamp, GError **err)
{
gswe_timestamp_calculate_julian(timestamp, err);
return timestamp->priv->julian_day;
}
/**
* gswe_timestamp_set_julian_day_ut:
* @timestamp: a GsweTimestamp
* @julian_day: The Julian day number in Universal Time
* @err: a #GError
*
* Sets the Julian day value of the timestamp. The Julian day is considered to
* be in Universal Time (UT). For Ephemeris time, see
* gswe_timestamp_set_julian_day(). Should an error occur, @err is populated
* with the error details.
*
* Since: 2.1
*/
void
gswe_timestamp_set_julian_day_ut(
GsweTimestamp *timestamp,
gdouble julian_day,
GError **err)
{
GError *err_local = NULL;
timestamp->priv->julian_day_ut = julian_day;
timestamp->priv->valid_dates = GSWE_VALID_JULIAN_DAY;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
// to get exact ET value, we must calculate gregorian date, and
// reverse-engineer the ET value from that. This is an overkill, but libswe
// doesn’t provide an API for that.
gswe_timestamp_calculate_gregorian(timestamp, err);
if (err_local) {
if (err) {
*err = err_local;
}
return;
}
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_GREGORIAN_VALID]
);
g_object_notify_by_pspec(
G_OBJECT(timestamp),
gswe_timestamp_props[PROP_JULIAN_DAY_VALID]
);
gswe_timestamp_calculate_julian(timestamp, err);
if (err_local) {
if (err) {
*err = err_local;
}
return;
}
if (timestamp->priv->instant_recalc == TRUE) {
gswe_timestamp_calculate_all(timestamp, err);
}
gswe_timestamp_emit_changed(timestamp);
}
/**
* gswe_timestamp_get_julian_day_ut:
* @timestamp: a #GsweTimestamp
* @err: a #GError
*
* Gets the Julian day value of @timestamp, Universal Time (UT). For Ephemeris
* Time (ET) see gswe_timestamp_get_julian_day_et(). @err is populated if the
* calculations raise an error.
*
* Since: 2.1
*/
gdouble
gswe_timestamp_get_julian_day_ut(GsweTimestamp *timestamp, GError **err)
{
gswe_timestamp_calculate_julian(timestamp, err);
return timestamp->priv->julian_day_ut;
}
/**
* gswe_timestamp_get_sidereal_time:
* @timestamp: a GsweTimestamp
* @err: a #GError
*
* Gets the sidereal time on the Greenwich Meridian.
*
* Returns: the sidereal time in hours. To get the degrees, multiply this value
* by 15.
*
* Since: 2.1
*/
gdouble
gswe_timestamp_get_sidereal_time(GsweTimestamp *timestamp, GError **err)
{
GError *local_err = NULL;
gswe_timestamp_calculate_julian(timestamp, &local_err);
if (local_err) {
if (err) {
*err = local_err;
} else {
g_error_free(local_err);
}
return 0.0;
}
return swe_sidtime(timestamp->priv->julian_day_ut);
}
/**
* gswe_timestamp_new:
*
* Creates a new GsweTimestamp object. The object is initialized with current
* date and time in the local timezone.
*
* Returns: a new GsweTimestamp object
*/
GsweTimestamp *
gswe_timestamp_new(void)
{
gswe_init();
return GSWE_TIMESTAMP(g_object_new(GSWE_TYPE_TIMESTAMP, NULL));
}
/**
* gswe_timestamp_new_from_gregorian_full:
* @year: the year
* @month: the month
* @day: the day
* @hour: the hour
* @minute: the minute
* @second: the second
* @microsecond: the microsecond
* @time_zone_offset: the time zone offset in hours
*
* Creates a new GsweTimestamp object, initialized with the Gregorian date
* specified by the function parameters.
*
* Returns: a new GsweTimestamp object.
*/
GsweTimestamp *
gswe_timestamp_new_from_gregorian_full(
gint year, gint month, gint day,
gint hour, gint minute, gint second, gint microsecond,
gdouble time_zone_offset)
{
GsweTimestamp *timestamp;
gswe_init();
timestamp = GSWE_TIMESTAMP(g_object_new(GSWE_TYPE_TIMESTAMP,
"gregorian-year", year,
"gregorian-month", month,
"gregorian-day", day,
"gregorian-hour", hour,
"gregorian-minute", minute,
"gregorian-second", second,
"gregorian-microsecond", microsecond,
"gregorian-timezone-offset", time_zone_offset,
NULL));
timestamp->priv->valid_dates = GSWE_VALID_GREGORIAN;
return timestamp;
}
/**
* gswe_timestamp_new_from_julian_day:
* @julian_day: a Julian day value, with time included as fractions.
*
* Creates a new GsweTimestamp object with @julian_day as its initial date
* value. The object can be used for astronomical calculations, e.g. with
* #GsweMoment, but unless a time zone is provided with
* gswe_timestamp_set_gregorian_timezone(), exact Gregorian dates can not be
* calculated.
*
* Returns: a new GsweTimestamp object.
*/
GsweTimestamp *
gswe_timestamp_new_from_julian_day(gdouble julian_day)
{
GsweTimestamp *timestamp;
timestamp = GSWE_TIMESTAMP(g_object_new(GSWE_TYPE_TIMESTAMP,
"julian-day", julian_day,
NULL));
return timestamp;
}
/**
* gswe_timestamp_set_now_local:
* @timestamp: the #GsweTimestamp to operate on
* @err: a #GError to store errors
*
* Sets the date and time in @timestamp to the current time in the local time
* zone. This also changes the timezone to the local time zone.
*/
void
gswe_timestamp_set_now_local(GsweTimestamp *timestamp,
GError **err)
{
GDateTime *datetime;
gint year,
month,
day,
hour,
minute,
seconds,
microsec;
gdouble timezone;
datetime = g_date_time_new_now_local();
year = g_date_time_get_year(datetime);
month = g_date_time_get_month(datetime);
day = g_date_time_get_day_of_month(datetime);
hour = g_date_time_get_hour(datetime);
minute = g_date_time_get_minute(datetime);
seconds = g_date_time_get_seconds(datetime);
microsec = g_date_time_get_microsecond(datetime);
timezone = (gdouble)g_date_time_get_utc_offset(datetime) / 3600000000.0;
g_date_time_unref(datetime);
gswe_timestamp_set_gregorian_full(
timestamp,
year, month, day,
hour, minute, seconds, microsec,
timezone,
err
);
}
/**
* gswe_timestamp_new_from_now_local:
*
* Create a new #GsweTimestamp initialised with the current local date and time.
*
* Returns: (transfer full): a new #GsweTimestamp object, or NULL upon an error.
*/
GsweTimestamp *
gswe_timestamp_new_from_now_local(void)
{
GsweTimestamp *ret;
GError *err = NULL;
ret = gswe_timestamp_new();
gswe_timestamp_set_now_local(ret, &err);
if (err) {
g_clear_error(&err);
return NULL;
}
return ret;
}