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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-moment.c

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/* gswe-moment.c - Planetary moment object for SWE-GLib
*
* 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 <swephexp.h>
#include "swe-glib.h"
#include "swe-glib-private.h"
#define glforeach(a, b) for ((a) = (b); (a); (a) = g_list_next((a)))
/**
* SECTION:gswe-moment
* @short_description: an exact moment of the sky, as seen from a given point
* of Earth at a given time
* @title: GsweMoment
* @stability: Stable
* @include: swe-glib/swe-glib.h
*
* This class represents an exact moment of the sky, as it can be seen from
* one given point on Earth at a given time.
*/
#define GSWE_MOMENT_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE( \
(obj), \
GSWE_TYPE_MOMENT, \
GsweMomentPrivate))
/**
* GsweMomentPrivate:
* @timestamp: a #GsweTimestmp object representing the current local time at
* the given position specified by @coordinates. Be warned though,
* that the time zone is NOT checked against the coordinates!
* @coordinates: the coordinates of the observers position
* @house_system: the house system this object uses
* @revision: an internal counter which is incremented whenever the timestamp
* or the coordinates change. When this number changes, every data
* that has a *_revision value here will be recalculated before the
* data is served
* @house_list: (element-type GsweHouseData): the list of house data
* @house_revision: the revision of the calculated house data
* @planet_list: (element-type GswePlanetData): the list of planets
* @points_revision: the revision of the points
* @element_points: the table of the element points
* @quality_points: the table of the quality points
* @moon_phase_revision: the revision of the Moon phase data
* @moon_phase: the calculated Moon phase data
* @aspect_list: (element-type GsweAspectData): the list of calculated aspects
* @aspect_revision: the revision of the aspect data
* @antiscia_list: (element-type GsweAntisciaData): the list of calculated
* antiscia (mirror points)
* @antiscia_revision: the revision of the antiscia data
*
* The private parts of #GsweMoment
*/
struct _GsweMomentPrivate {
GsweTimestamp *timestamp;
GsweCoordinates coordinates;
GsweHouseSystem house_system;
guint revision;
GList *house_list;
guint house_revision;
GList *planet_list;
guint points_revision;
GHashTable *element_points;
GHashTable *quality_points;
guint moon_phase_revision;
GsweMoonPhaseData *moon_phase;
GList *aspect_list;
guint aspect_revision;
GList *antiscia_list;
guint antiscia_revision;
gulong timestamp_signal_handler;
};
enum {
SIGNAL_CHANGED,
SIGNAL_PLANET_ADDED,
SIGNAL_LAST
};
enum {
PROP_0,
PROP_TIMESTAMP,
PROP_COORDINATES,
PROP_HOUSE_SYSTEM,
PROP_COUNT
};
struct GsweAspectFinder {
GswePlanet planet1;
GswePlanet planet2;
};
static guint gswe_moment_signals[SIGNAL_LAST] = {0};
static void gswe_moment_dispose(GObject *gobject);
static void gswe_moment_finalize(GObject *gobject);
static void gswe_moment_set_property(
GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gswe_moment_get_property(
GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static GParamSpec *properties[PROP_COUNT];
G_DEFINE_TYPE(GsweMoment, gswe_moment, G_TYPE_OBJECT);
static void
gswe_moment_class_init(GsweMomentClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
g_type_class_add_private(klass, sizeof(GsweMomentPrivate));
gobject_class->dispose = gswe_moment_dispose;
gobject_class->finalize = gswe_moment_finalize;
gobject_class->set_property = gswe_moment_set_property;
gobject_class->get_property = gswe_moment_get_property;
/**
* GsweMoment::changed:
* @moment: the GsweMoment object that received the signal
*
* The ::changed signal is emitted each time the time, coordinates
* or the house system changes.
*/
gswe_moment_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
);
/**
* GsweMoment::planet-added:
* @moment: the GsweMoment object that received the signal
* @planet: the planet that was just added to @moment
*
* The ::planet-added signal is emitted each time a planet is
* added to @moment.
*/
gswe_moment_signals[SIGNAL_PLANET_ADDED] = g_signal_new(
"planet-added",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_FIRST,
0,
NULL,
NULL,
g_cclosure_marshal_generic,
G_TYPE_NONE,
1,
GSWE_TYPE_PLANET
);
/**
* GsweMoment:timestamp:
*
* The timestamp associated with this moment
*/
properties[PROP_TIMESTAMP] = g_param_spec_object(
"timestamp",
"Timestamp",
"Timestamp of this moment",
GSWE_TYPE_TIMESTAMP,
G_PARAM_STATIC_NICK
| G_PARAM_STATIC_NAME
| G_PARAM_STATIC_BLURB
| G_PARAM_READABLE
| G_PARAM_WRITABLE
);
g_object_class_install_property(
gobject_class,
PROP_TIMESTAMP,
properties[PROP_TIMESTAMP]
);
/**
* GsweMoment:coordinates:
*
* The geographical coordinates associated with this moment
*/
properties[PROP_COORDINATES] = g_param_spec_boxed(
"coordinates",
"Coordinates",
"Geographical coordinates",
GSWE_TYPE_COORDINATES,
G_PARAM_STATIC_NICK
| G_PARAM_STATIC_NAME
| G_PARAM_STATIC_BLURB
| G_PARAM_READABLE
| G_PARAM_WRITABLE
);
g_object_class_install_property(
gobject_class,
PROP_COORDINATES,
properties[PROP_COORDINATES]
);
/**
* GsweMoment:house-system:
*
* The house system associated with this moment
*/
properties[PROP_HOUSE_SYSTEM] = g_param_spec_enum(
"house-system",
"House System",
"Astrological house system",
GSWE_TYPE_HOUSE_SYSTEM,
GSWE_HOUSE_SYSTEM_PLACIDUS,
G_PARAM_STATIC_NICK
| G_PARAM_STATIC_NAME
| G_PARAM_STATIC_BLURB
| G_PARAM_READABLE
| G_PARAM_WRITABLE
);
g_object_class_install_property(
gobject_class,
PROP_HOUSE_SYSTEM,
properties[PROP_HOUSE_SYSTEM]
);
}
static void
gswe_moment_emit_changed(GsweMoment *moment)
{
g_signal_emit(moment, gswe_moment_signals[SIGNAL_CHANGED], 0);
}
static void
gswe_moment_init(GsweMoment *moment)
{
moment->priv = GSWE_MOMENT_GET_PRIVATE(moment);
moment->priv->timestamp = NULL;
moment->priv->house_list = NULL;
moment->priv->planet_list = NULL;
moment->priv->aspect_list = NULL;
moment->priv->antiscia_list = NULL;
moment->priv->moon_phase = gswe_moon_phase_data_new();
moment->priv->element_points = g_hash_table_new_full(
g_direct_hash, g_direct_equal,
NULL, NULL
);
moment->priv->quality_points = g_hash_table_new_full(
g_direct_hash, g_direct_equal,
NULL, NULL
);
moment->priv->house_revision = 0;
moment->priv->points_revision = 0;
moment->priv->moon_phase_revision = 0;
moment->priv->aspect_revision = 0;
moment->priv->antiscia_revision = 0;
moment->priv->revision = 1;
}
static void
gswe_moment_timestamp_changed(GsweTimestamp *timestamp, GsweMoment *moment)
{
moment->priv->revision++;
gswe_moment_emit_changed(moment);
}
/* Dispose object */
static void
gswe_moment_dispose(GObject *gobject)
{
GsweMoment *moment = GSWE_MOMENT(gobject);
g_signal_handler_disconnect(
moment->priv->timestamp,
moment->priv->timestamp_signal_handler
);
g_clear_object(&moment->priv->timestamp);
G_OBJECT_CLASS(gswe_moment_parent_class)->dispose(gobject);
}
/* Reset object to the initialized state */
static void
gswe_moment_finalize(GObject *gobject)
{
GsweMoment *moment = GSWE_MOMENT(gobject);
g_clear_object(&moment->priv->timestamp);
g_list_free_full(
moment->priv->house_list,
(GDestroyNotify)gswe_house_data_unref
);
moment->priv->house_list = NULL;
g_list_free_full(
moment->priv->planet_list,
(GDestroyNotify)gswe_planet_data_unref
);
moment->priv->planet_list = NULL;
g_list_free_full(
moment->priv->aspect_list,
(GDestroyNotify)gswe_aspect_data_unref
);
moment->priv->aspect_list = NULL;
g_list_free_full(
moment->priv->antiscia_list,
(GDestroyNotify)gswe_antiscion_data_unref
);
moment->priv->antiscia_list = NULL;
g_hash_table_remove_all(moment->priv->element_points);
g_hash_table_remove_all(moment->priv->quality_points);
moment->priv->house_revision = 0;
moment->priv->points_revision = 0;
moment->priv->moon_phase_revision = 0;
moment->priv->aspect_revision = 0;
moment->priv->antiscia_revision = 0;
moment->priv->revision = 1;
G_OBJECT_CLASS(gswe_moment_parent_class)->finalize(gobject);
}
static void
gswe_moment_set_property(
GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GsweMoment *moment = GSWE_MOMENT(object);
switch (prop_id) {
case PROP_TIMESTAMP:
gswe_moment_set_timestamp(moment, (g_value_get_object(value)));
break;
case PROP_COORDINATES:
{
GsweCoordinates *coords = g_value_get_boxed(value);
gswe_moment_set_coordinates(
moment,
coords->longitude,
coords->latitude,
coords->altitude
);
}
break;
case PROP_HOUSE_SYSTEM:
gswe_moment_set_house_system(moment, g_value_get_enum(value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gswe_moment_get_property(
GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec
)
{
GsweMoment *moment = GSWE_MOMENT(object);
GsweMomentPrivate *priv = moment->priv;
switch (prop_id) {
case PROP_TIMESTAMP:
g_value_set_object(value, priv->timestamp);
break;
case PROP_COORDINATES:
{
GsweCoordinates *coords = gswe_coordinates_copy(
&(priv->coordinates)
);
g_value_set_boxed(value, coords);
}
break;
case PROP_HOUSE_SYSTEM:
g_value_set_enum(value, priv->house_system);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
/**
* gswe_moment_set_timestamp:
* @moment: A GsweMoment object
* @timestamp: A GsweTimestamp object. The moment object holds a reference on
* timestamp, which is cleared when a new timestamp is set, or the
* moment object is disposed.
*
* Sets a new timestamp for this planetary moment. Also emits the ::changed
* signal to notify owner of this change. This helps redrawing screen data
* according to the new time value.
*/
void
gswe_moment_set_timestamp(GsweMoment *moment, GsweTimestamp *timestamp)
{
if (moment->priv->timestamp == timestamp) {
return;
}
if (moment->priv->timestamp != NULL) {
g_signal_handler_disconnect(
moment->priv->timestamp,
moment->priv->timestamp_signal_handler
);
g_clear_object(&moment->priv->timestamp);
}
moment->priv->revision++;
moment->priv->timestamp = timestamp;
g_object_ref(timestamp);
moment->priv->timestamp_signal_handler = g_signal_connect(
G_OBJECT(timestamp),
"changed",
G_CALLBACK(gswe_moment_timestamp_changed),
moment
);
/* Emit the changed signal to notify registrants of the change */
gswe_moment_emit_changed(moment);
g_object_notify_by_pspec(G_OBJECT(moment), properties[PROP_TIMESTAMP]);
}
/**
* gswe_moment_get_timestamp:
* @moment: a GsweMoment object
*
* Gets the #GsweTimestamp object associated with @moment
*
* Returns: (transfer none): the GsweTimestamp object associated with @moment.
* The returned object is used by @moment exclusively. If you need it even
* after @moment is destroyed, call g_object_ref() on it.
*/
GsweTimestamp *
gswe_moment_get_timestamp(GsweMoment *moment)
{
return moment->priv->timestamp;
}
/**
* gswe_moment_set_coordinates:
* @moment: a GsweMoment
* @longitude: the longitude part of the coordinates, in degrees
* @latitude: the latitude part of the coordinates, in degrees
* @altitude: the altitude part of the coordinates, in meters. As also noted in
* the README, it is safe to pass a value of around 400.0, unless
* you want to create a *really* precise chart
*
* Sets the coordinates associated with @moment. Emits the ::changed signal on
* @moment. All values depending on the coordinates (planetary and house cusp
* positions, aspects, antiscion, so basically everything) should be
* re-fetched after changing it.
*/
void
gswe_moment_set_coordinates(
GsweMoment *moment,
gdouble longitude,
gdouble latitude,
gdouble altitude)
{
GsweCoordinates *current_coords = &(moment->priv->coordinates);
if (
(current_coords->longitude == longitude)
&& (current_coords->latitude == latitude)
&& (current_coords->altitude == altitude)
) {
return;
}
moment->priv->coordinates.longitude = longitude;
moment->priv->coordinates.latitude = latitude;
moment->priv->coordinates.altitude = altitude;
moment->priv->revision++;
gswe_moment_emit_changed(moment);
g_object_notify_by_pspec(G_OBJECT(moment), properties[PROP_COORDINATES]);
}
/**
* gswe_moment_get_coordinates:
* @moment: a GsweMoment
*
* Gets the coordinates associated with @moment.
*
* Returns: (transfer full): a newly allocated GsweCoordinates structure with
* the coordinates associated with @moment. The returned pointer
* should be freed with g_free if you don't need it any more.
*/
GsweCoordinates *
gswe_moment_get_coordinates(GsweMoment *moment)
{
return gswe_coordinates_copy(&(moment->priv->coordinates));
}
/**
* gswe_moment_set_house_system:
* @moment: a GsweMoment object
* @house_system: the new house system to associate with @moment
*
* Associates a new house system with @moment. Emits the ::changed signal.
* House cusp positions are recalculated upon next fetch.
*/
void
gswe_moment_set_house_system(GsweMoment *moment, GsweHouseSystem house_system)
{
if (moment->priv->house_system != house_system) {
moment->priv->house_system = house_system;
moment->priv->revision++;
gswe_moment_emit_changed(moment);
g_object_notify_by_pspec(G_OBJECT(moment), properties[PROP_HOUSE_SYSTEM]);
}
}
/**
* gswe_moment_get_house_system:
* @moment: a GsweMoment object
*
* Gets the house system associated with @moment.
*
* Returns: The house system currently associated with @moment
*/
GsweHouseSystem
gswe_moment_get_house_system(GsweMoment *moment)
{
return moment->priv->house_system;
}
/**
* gswe_moment_new:
*
* Creates a new, empty GsweMoment object. The object created this way can not
* be used for any calculations yet, you need to call various gswe_moment_set_*
* functions first. It is preferred to call gswe_moment_new_full() instead.
*
* Returns: (transfer full): a new GsweMoment object
*/
GsweMoment *
gswe_moment_new(void)
{
gswe_init();
return (GsweMoment *)g_object_new(GSWE_TYPE_MOMENT, NULL);
}
/**
* gswe_moment_new_full:
* @timestamp: a #GsweTimestamp, the exact time of your calculations
* @longitude: the longitude part of the observer's position, in degrees
* @latitude: the latitude part of the observer's position, in degrees
* @altitude: the altitude part of the coordinates, in meters. As also noted in
* the README, it is safe to pass a value of around 400.0, unless
* you want to create a *really* precise chart
* @house_system: the house system you want to use
*
* Creates a new GsweMoment object with the timestamp, coordinates and house
* system set. This is the preferred way to create a GsweMoment object.
*
* Returns: (transfer full): a new GsweMoment object, which is usable out of
* the box
*/
GsweMoment *
gswe_moment_new_full(
GsweTimestamp *timestamp,
gdouble longitude,
gdouble latitude,
gdouble altitude,
GsweHouseSystem house_system)
{
GsweMoment *moment = gswe_moment_new();
moment->priv->timestamp = timestamp;
g_object_ref(timestamp);
g_signal_connect(
G_OBJECT(timestamp),
"changed",
G_CALLBACK(gswe_moment_timestamp_changed),
moment
);
moment->priv->coordinates.longitude = longitude;
moment->priv->coordinates.latitude = latitude;
moment->priv->coordinates.altitude = altitude;
moment->priv->house_system = house_system;
return moment;
}
static gint
find_planet_by_id(GswePlanetData *planet_data, GswePlanet *planet)
{
if (planet_data->planet_info == NULL) {
return -1;
}
if (planet_data->planet_info->planet == *planet) {
return 0;
}
return 1;
}
static void
calculate_data_by_position(
GsweMoment *moment,
GswePlanet planet,
gdouble position,
GError **err)
{
GswePlanetData *planet_data;
GsweZodiac sign;
GsweSignInfo *sign_info;
GList *result;
if ((result = g_list_find_custom(
moment->priv->planet_list,
&planet,
(GCompareFunc)find_planet_by_id
)) == NULL) {
return;
}
if ((planet_data = (GswePlanetData *)(result->data)) == NULL) {
return;
}
if (planet_data->revision == moment->priv->revision) {
return;
}
sign = (GsweZodiac)ceil(position / 30.0);
// If position happens to be exactly 0, this calculation yields
// GSWE_SIGN_NONE, but should be GSWE_SIGN_ARIES
if (sign == GSWE_SIGN_NONE) {
sign = GSWE_SIGN_ARIES;
}
if ((sign_info = g_hash_table_lookup(
gswe_sign_info_table,
GINT_TO_POINTER(sign)
)) == NULL) {
g_error("Calculations brought an unknown sign!");
}
planet_data->position = position;
planet_data->retrograde = FALSE;
planet_data->house = gswe_moment_get_house(moment, position, err);
planet_data->sign_info = gswe_sign_info_ref(sign_info);
planet_data->revision = moment->priv->revision;
}
static void
gswe_moment_calculate_house_positions(GsweMoment *moment, GError **err)
{
gdouble cusps[13],
ascmc[10],
jd;
gint i;
GsweHouseSystemInfo *house_system_info;
if (moment->priv->house_revision == moment->priv->revision) {
return;
}
g_list_free_full(
moment->priv->house_list,
(GDestroyNotify)gswe_house_data_unref
);
moment->priv->house_list = NULL;
// If no house system is set, we need no calculations at all. Just leave
// the list empty and return
if (moment->priv->house_system == GSWE_HOUSE_SYSTEM_NONE) {
moment->priv->house_revision = moment->priv->revision;
return;
}
if ((house_system_info = g_hash_table_lookup(
gswe_house_system_info_table,
GINT_TO_POINTER(moment->priv->house_system)
)) == NULL) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_UNKNOWN_HSYS,
"Unknown house system"
);
return;
}
jd = gswe_timestamp_get_julian_day_et(moment->priv->timestamp, err);
// If Julian Day calculation yields error, we don't do anything. err is
// already filled with the error message, so let's just return
if ((err) && (*err)) {
return;
}
swe_houses(
jd,
moment->priv->coordinates.latitude,
moment->priv->coordinates.longitude,
house_system_info->sweph_id,
cusps,
ascmc
);
/* TODO: SWE house system 'G' (Gauquelin sector cusps) have 36 houses; we
* should detect that somehow (house system 'G' is not implemented yet in
* GsweHouseSystem, and all other house systems have exactly 12 houses, so
* this should not cause trouble yet, though) */
for (i = 12; i >= 1; i--) {
GsweSignInfo *sign_info;
GsweHouseData *house_data = gswe_house_data_new();
house_data->house = i;
house_data->cusp_position = cusps[i];
if ((sign_info = g_hash_table_lookup(
gswe_sign_info_table,
GINT_TO_POINTER((gint)ceilf(cusps[i] / 30.0))
)) == NULL) {
g_list_free_full(
moment->priv->house_list,
(GDestroyNotify)gswe_house_data_unref
);
moment->priv->house_list = NULL;
moment->priv->house_revision = 0;
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_UNKNOWN_SIGN,
"Calculation brought an unknown sign"
);
return;
}
house_data->sign_info = gswe_sign_info_ref(sign_info);
moment->priv->house_list = g_list_prepend(
moment->priv->house_list,
house_data
);
}
moment->priv->house_revision = moment->priv->revision;
// The Ascendant, MC and Vertex points are also calculated by swe_houses(),
// so let's update them.
if (gswe_moment_has_planet(moment, GSWE_PLANET_ASCENDANT)) {
calculate_data_by_position(
moment,
GSWE_PLANET_ASCENDANT,
ascmc[0],
err
);
}
if (gswe_moment_has_planet(moment, GSWE_PLANET_DESCENDANT)) {
calculate_data_by_position(
moment,
GSWE_PLANET_DESCENDANT,
fmod(ascmc[0] + 180.0, 180.0),
err
);
}
if (gswe_moment_has_planet(moment, GSWE_PLANET_MC)) {
calculate_data_by_position(moment, GSWE_PLANET_MC, ascmc[1], err);
}
if (gswe_moment_has_planet(moment, GSWE_PLANET_IC)) {
calculate_data_by_position(
moment,
GSWE_PLANET_IC,
fmod(ascmc[2] + 180.0, 180.0),
err
);
}
if (gswe_moment_has_planet(moment, GSWE_PLANET_VERTEX)) {
calculate_data_by_position(moment, GSWE_PLANET_VERTEX, ascmc[3], err);
}
if (gswe_moment_has_planet(moment, GSWE_PLANET_ANTIVERTEX)) {
calculate_data_by_position(
moment,
GSWE_PLANET_ANTIVERTEX,
fmod(ascmc[3] + 180.0, 180.0),
err
);
}
}
/**
* gswe_moment_get_house_cusps:
* @moment: The GsweMoment object to operate on
* @err: a #GError
*
* Calculate house cusp positions based on the house system, location and time
* set in @moment.
*
* Returns: (element-type GsweHouseData) (transfer none): a GList of
* #GsweHouseData
*/
GList *
gswe_moment_get_house_cusps(GsweMoment *moment, GError **err)
{
if (moment->priv->house_revision != moment->priv->revision) {
gswe_moment_calculate_house_positions(moment, err);
}
return moment->priv->house_list;
}
/**
* gswe_moment_has_planet:
* @moment: a GsweMoment
* @planet: the planet whose existence is queried
*
* Checks if @planet is added to @moment, e.g. its position and related data is
* calculated.
*
* Returns: #TRUE if @planet is already added to @moment, #FALSE otherwise
*/
gboolean
gswe_moment_has_planet(GsweMoment *moment, GswePlanet planet)
{
return (g_list_find_custom(
moment->priv->planet_list,
&planet,
(GCompareFunc)find_planet_by_id
) != NULL);
}
/**
* gswe_moment_add_planet:
* @moment: a GsweMoment object
* @planet: the planet to add
* @err: a #GError
*
* Adds @planet to the calculated planets of @moment. @err is populated with
* GSWE_ERROR_UNKNOWN_PLANET if the given planet is not known to SWE-GLib.
*/
void
gswe_moment_add_planet(GsweMoment *moment, GswePlanet planet, GError **err)
{
GswePlanetData *planet_data;
GswePlanetInfo *planet_info;
if (gswe_moment_has_planet(moment, planet)) {
return;
}
if ((planet_info = g_hash_table_lookup(
gswe_planet_info_table,
GINT_TO_POINTER(planet)
)) == NULL) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_UNKNOWN_PLANET,
"Unknown planet"
);
return;
}
planet_data = gswe_planet_data_new();
planet_data->planet_info = gswe_planet_info_ref(planet_info);
planet_data->revision = 0;
moment->priv->planet_list = g_list_append(
moment->priv->planet_list,
planet_data
);
g_signal_emit(moment, gswe_moment_signals[SIGNAL_PLANET_ADDED], 0, planet);
}
static void
planet_add(gpointer key, gpointer value, GsweMoment *moment)
{
GswePlanet planet = (GswePlanet)GPOINTER_TO_INT(key);
gswe_moment_add_planet(moment, planet, NULL);
}
/**
* gswe_moment_add_all_planets:
* @moment: a GsweMoment object
*
* Adds all known planets to @moment.
*/
void
gswe_moment_add_all_planets(GsweMoment *moment)
{
g_hash_table_foreach(gswe_planet_info_table, (GHFunc)planet_add, moment);
}
static void
gswe_moment_calculate_planet(GsweMoment *moment,
GswePlanet planet,
GError **err)
{
GswePlanetData *planet_data;
gpointer data = g_list_find_custom(
moment->priv->planet_list,
&planet,
(GCompareFunc)find_planet_by_id
);
g_return_if_fail(data != NULL);
planet_data = (GswePlanetData *)(g_list_find_custom(
moment->priv->planet_list,
&planet,
(GCompareFunc)find_planet_by_id
)->data);
gchar serr[AS_MAXCH];
gint ret;
gdouble x2[6],
jd;
GError *calc_err = NULL;
if (planet_data == NULL) {
return;
}
if (planet_data->revision == moment->priv->revision) {
return;
}
swe_set_topo(
moment->priv->coordinates.longitude,
moment->priv->coordinates.latitude,
moment->priv->coordinates.altitude
);
jd = gswe_timestamp_get_julian_day_et(moment->priv->timestamp, err);
if (planet_data->planet_info->real_body == FALSE) {
if (
(planet_data->planet_info->planet != GSWE_PLANET_ASCENDANT)
&& (planet_data->planet_info->planet != GSWE_PLANET_MC)
&& (planet_data->planet_info->planet != GSWE_PLANET_VERTEX)
) {
g_warning(
"The position data of planet %d can not be "
"calculated by this function",
planet
);
return;
} else {
// gswe_moment_calculate_house_positions() calculates house cusp
// positions, together with Ascendant, MC and Vertex points
gswe_moment_calculate_house_positions(moment, err);
return;
}
}
if ((err) && (*err)) {
return;
}
if ((ret = swe_calc(
jd,
planet_data->planet_info->sweph_id,
SEFLG_SPEED | SEFLG_TOPOCTR,
x2,
serr
)) < 0) {
g_warning("Swiss Ephemeris error: %s", serr);
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_SWE_FATAL,
"Swiss Ephemeris fatal error: %s",
serr
);
return;
} else if (ret != (SEFLG_SPEED | SEFLG_TOPOCTR)) {
g_warning("Swiss Ephemeris non-fatal error: %s", serr);
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_SWE_NONFATAL,
"Swiss Ephemeris error: %s",
serr
);
}
// The south node is actually on the opposite side of the chart,
// so let’s invert the position.
if (planet == GSWE_PLANET_MOON_SOUTH_NODE) {
x2[0] = fmod(x2[0] + 180.0, 180.0);
}
calculate_data_by_position(moment, planet, x2[0], &calc_err);
if (calc_err != NULL) {
g_clear_error(err);
if (err) {
*err = calc_err;
}
}
planet_data->retrograde = (x2[3] < 0);
}
static void
calculate_planet(GswePlanetData *planet_data, GsweMoment *moment)
{
if (planet_data->planet_info) {
gswe_moment_calculate_planet(
moment,
planet_data->planet_info->planet,
NULL
);
} else {
g_warning(
"planet_data holds no planet. This is a possible "
"bug in SWE-GLib, or in your application."
);
}
}
static void
gswe_moment_calculate_all_planets(GsweMoment *moment)
{
g_list_foreach(moment->priv->planet_list, (GFunc)calculate_planet, moment);
}
/**
* gswe_moment_get_all_planets:
* @moment: The GsweMoment to operate on
*
* Get all the planets added to @moment.
*
* Returns: (element-type GswePlanetData) (transfer none): A #GList of
* #GswePlanetData.
*/
GList *
gswe_moment_get_all_planets(GsweMoment *moment)
{
gswe_moment_calculate_all_planets(moment);
return moment->priv->planet_list;
}
/**
* gswe_moment_get_sign_planets:
* @moment: a GsweMoment
* @sign: the sign of whose planets are requested
*
* Gets the list of planets in @sign.
*
* Returns: (transfer container) (element-type GswePlanetData): a #GList of
* #GswePlanetData.
*/
GList *
gswe_moment_get_sign_planets(GsweMoment *moment, GsweZodiac sign)
{
GList *ret = NULL,
*planet;
gswe_moment_calculate_all_planets(moment);
glforeach (planet, moment->priv->planet_list) {
GswePlanetData *pd = planet->data;
if (pd->sign_info->sign == sign) {
ret = g_list_prepend(ret, pd);
}
}
return ret;
}
/**
* gswe_moment_get_house_planets:
* @moment: a GsweMoment
* @house: a house number
*
* Gets the list of planets in house @house.
*
* Returns: (transfer container) (element-type GswePlanetData): a #GList of
* #GswePlanetData
*/
GList *
gswe_moment_get_house_planets(GsweMoment *moment, guint house)
{
GList *ret = NULL,
*planet;
// If the house system is none, we always return NULL
if (moment->priv->house_system == GSWE_HOUSE_SYSTEM_NONE) {
return NULL;
}
gswe_moment_calculate_all_planets(moment);
glforeach (planet, moment->priv->planet_list) {
GswePlanetData *pd = planet->data;
if (pd->house == house) {
ret = g_list_prepend(ret, pd);
}
}
return ret;
}
/**
* gswe_moment_get_house:
* @moment: a GsweMoment object
* @position: an ecliptic position
* @err: a #GError
*
* Returns the number of the house in which @position is.
*
* Returns: the number of the house in which @position is. This function always
* yields 0 if the associated house system is #GSWE_HOUSE_SYSTEM_NONE.
*/
gint
gswe_moment_get_house(GsweMoment *moment, gdouble position, GError **err)
{
gint i;
if (moment->priv->house_system == GSWE_HOUSE_SYSTEM_NONE) {
return 0;
}
gswe_moment_calculate_house_positions(moment, err);
/* TODO: SWE house system 'G' (Gauquelin sector cusps) have 36 houses; we
* should detect that somehow (house system 'G' is not implemented yet in
* GsweHouseSystem, and all other house systems have exactly 12 houses, so
* this should not cause trouble yet, though) */
for (i = 1; i <= 12; i++) {
gint j = (i < 12) ? i + 1 : 1;
gdouble cusp_i = *(gdouble *)g_list_nth_data(
moment->priv->house_list,
i - 1
),
cusp_j = *(gdouble *)g_list_nth_data(
moment->priv->house_list,
j - 1
);
if (cusp_j < cusp_i) {
if ((position >= cusp_i) || (position < cusp_j)) {
return i;
}
} else {
if ((position >= cusp_i) && (position < cusp_j)) {
return i;
}
}
}
return 0;
}
/**
* gswe_moment_get_planet:
* @moment: a GsweMoment
* @planet: the planet whose data is requested
* @err: a #GError
*
* Gets @planet's data, like its position, house number, sign, etc. @err is
* populated if the planetary information can not be calculated.
*
* WARNING! @err may be populated if the Swiss Ephemeris data files are not
* found. For some planets, position data still can be calculated (the results
* will not be that exact, though). @err is populatet only to carry this
* warning. Thus, you should always provide a non-NULL value for @err, and
* always check it after calling this function.
*
* Returns: (transfer full): @planet's data
*/
GswePlanetData *
gswe_moment_get_planet(GsweMoment *moment, GswePlanet planet, GError **err)
{
GList *planet_element;
GswePlanetData *planet_data;
if ((planet_element = g_list_find_custom(
moment->priv->planet_list,
&planet,
(GCompareFunc)find_planet_by_id
)) == NULL) {
return NULL;
}
planet_data = (GswePlanetData *)(planet_element->data);
if (planet_data == NULL) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_UNKNOWN_PLANET,
"Specified planet is not added to the moment object"
);
return NULL;
}
gswe_moment_calculate_planet(moment, planet, err);
return gswe_planet_data_ref(planet_data);
}
static void
add_points(GswePlanetData *planet_data, GsweMoment *moment)
{
guint point;
GsweSignInfo *sign_info;
GswePlanetInfo *planet_info;
GsweElement element;
GsweQuality quality;
gswe_moment_calculate_planet(
moment,
planet_data->planet_info->planet,
NULL
);
sign_info = gswe_planet_data_get_sign_info(planet_data);
if (G_UNLIKELY(sign_info == NULL)) {
g_error("Planet data calculation failed");
}
planet_info = gswe_planet_data_get_planet_info(planet_data);
if (G_UNLIKELY(planet_info == NULL)) {
g_error("Planet data calculation failed. No planet info.");
}
element = gswe_sign_info_get_element(sign_info);
point = GPOINTER_TO_INT(g_hash_table_lookup(
moment->priv->element_points,
GINT_TO_POINTER(element)
)) + gswe_planet_info_get_points(planet_info);
g_hash_table_replace(
moment->priv->element_points,
GINT_TO_POINTER(element),
GINT_TO_POINTER(point)
);
quality = gswe_sign_info_get_quality(sign_info);
point = GPOINTER_TO_INT(g_hash_table_lookup(
moment->priv->quality_points,
GINT_TO_POINTER(quality)
)) + gswe_planet_info_get_points(planet_info);
g_hash_table_replace(
moment->priv->quality_points,
GINT_TO_POINTER(quality),
GINT_TO_POINTER(point)
);
}
static void
gswe_moment_calculate_points(GsweMoment *moment)
{
if (moment->priv->points_revision == moment->priv->revision) {
return;
}
g_hash_table_remove_all(moment->priv->element_points);
g_hash_table_remove_all(moment->priv->quality_points);
g_list_foreach(moment->priv->planet_list, (GFunc)add_points, moment);
moment->priv->points_revision = moment->priv->revision;
}
/**
* gswe_moment_get_element_points:
* @moment: a GsweMoment
* @element: the element whose point value is requested
*
* Gets the point value of the @element element.
*
* Returns: the point value
*/
guint
gswe_moment_get_element_points(GsweMoment *moment, GsweElement element)
{
guint point;
gswe_moment_calculate_points(moment);
point = GPOINTER_TO_INT(g_hash_table_lookup(
moment->priv->element_points,
GINT_TO_POINTER(element)
));
return point;
}
/**
* gswe_moment_get_quality_points:
* @moment: a GsweMoment
* @quality: the quality whose point value is requested
*
* Gets the point value of the @quality quality.
*
* Returns: the point value
*/
guint
gswe_moment_get_quality_points(GsweMoment *moment, GsweQuality quality)
{
guint point;
gswe_moment_calculate_points(moment);
point = GPOINTER_TO_INT(g_hash_table_lookup(
moment->priv->quality_points,
GINT_TO_POINTER(quality)
));
return point;
}
/**
* gswe_moment_get_moon_phase:
* @moment: a GsweMoment
* @err: a #GError
*
* Gets the phase of the Moon.
*
* Returns: (transfer full): a #GsweMoonPhaseData representing the phase of the
* Moon
*/
GsweMoonPhaseData *
gswe_moment_get_moon_phase(GsweMoment *moment, GError **err)
{
if (moment->priv->moon_phase_revision == moment->priv->revision) {
return moment->priv->moon_phase;
}
gswe_moon_phase_data_calculate_by_timestamp(
moment->priv->moon_phase,
moment->priv->timestamp,
err
);
if (!err || !*err) {
moment->priv->moon_phase_revision = moment->priv->revision;
}
return gswe_moon_phase_data_ref(moment->priv->moon_phase);
}
static gint
find_aspect_by_both_planets(
GsweAspectData *aspect,
struct GsweAspectFinder *aspect_finder)
{
if (
(
(aspect->planet1->planet_info->planet == aspect_finder->planet1)
&& (aspect->planet2->planet_info->planet == aspect_finder->planet2)
)
|| (
(aspect->planet1->planet_info->planet == aspect_finder->planet2)
&& (aspect->planet2->planet_info->planet == aspect_finder->planet1)
)
) {
return 0;
}
return 1;
}
static void
gswe_moment_calculate_aspects(GsweMoment *moment)
{
GList *oplanet,
*iplanet;
if (moment->priv->aspect_revision == moment->priv->revision) {
return;
}
gswe_moment_calculate_all_planets(moment);
g_list_free_full(
moment->priv->aspect_list,
(GDestroyNotify)gswe_aspect_data_unref
);
moment->priv->aspect_list = NULL;
for (
oplanet = moment->priv->planet_list;
oplanet;
oplanet = g_list_next(oplanet)) {
for (
iplanet = moment->priv->planet_list;
iplanet;
iplanet = g_list_next(iplanet)) {
GswePlanetData *outer_planet = oplanet->data,
*inner_planet = iplanet->data;
struct GsweAspectFinder aspect_finder;
GsweAspectData *aspect_data;
GList *aspect_data_element;
if (outer_planet->planet_info->planet
== inner_planet->planet_info->planet
) {
continue;
}
aspect_finder.planet1 = outer_planet->planet_info->planet;
aspect_finder.planet2 = inner_planet->planet_info->planet;
if ((aspect_data_element = g_list_find_custom(
moment->priv->aspect_list,
&aspect_finder,
(GCompareFunc)find_aspect_by_both_planets
)) != NULL) {
gswe_aspect_data_calculate(aspect_data_element->data);
} else {
aspect_data = gswe_aspect_data_new_with_planets(
inner_planet,
outer_planet
);
moment->priv->aspect_list = g_list_prepend(
moment->priv->aspect_list,
aspect_data
);
}
}
}
moment->priv->aspect_revision = moment->priv->revision;
}
/**
* gswe_moment_get_all_aspects:
* @moment: the GsweMoment to operate on
*
* Gets all planetary aspects between the planets added by
* gswe_moment_add_planet() or gswe_moment_add_all_planets().
*
* Returns: (element-type GsweAspectData) (transfer none): a GList of
* #GsweAspectData. Both the GList and GsweAspectData objects belong
* to @moment, and should not be freed or modified.
*/
GList *
gswe_moment_get_all_aspects(GsweMoment *moment)
{
gswe_moment_calculate_aspects(moment);
return moment->priv->aspect_list;
}
/**
* gswe_moment_get_planet_aspects:
* @moment: the GsweMoment to operate on
* @planet: the planet whose aspects you want to get
* @err: a #GError
*
* Get all the aspects between @planet and all the other planets added with
* gswe_moment_add_planet() or gswe_moment_add_all_planets().
*
* Returns: (element-type GsweAspectData) (transfer container): a #GList of
* #GsweAspectData. The GsweAspectData structures belong to @moment,
* but the GList should be freed using g_list_free(). If the planet
* has no aspects, or the planet has not been added to @moment,
* returns NULL.
*/
GList *
gswe_moment_get_planet_aspects(
GsweMoment *moment,
GswePlanet planet,
GError **err)
{
GList *ret = NULL,
*aspect;
if (!gswe_moment_has_planet(moment, planet)) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_UNKNOWN_PLANET,
"Specified planet is not added to the moment object"
);
return NULL;
}
gswe_moment_calculate_aspects(moment);
for (
aspect = moment->priv->aspect_list;
aspect;
aspect = g_list_next(aspect)
) {
GsweAspectData *aspect_data = aspect->data;
if (
(aspect_data->planet1->planet_info->planet == planet)
|| (aspect_data->planet2->planet_info->planet == planet)
) {
ret = g_list_prepend(ret, aspect_data);
}
}
return ret;
}
/**
* gswe_moment_get_aspect_by_planets:
* @moment: the GsweMoment to operate on
* @planet1: the first planet
* @planet2: the second planet
* @err: a #GError
*
* Get the aspect between two given planets. The order of @planet1 and @planet2
* doesn’t matter.
*
* Returns: (transfer none): a #GsweAspectData containing the aspect data of the
* two planets. If an error occurs, like when one of the planets are
* not added to the planet list, returns NULL, and @err is set
* accordingly.
*/
GsweAspectData *
gswe_moment_get_aspect_by_planets(
GsweMoment *moment,
GswePlanet planet1,
GswePlanet planet2,
GError **err)
{
struct GsweAspectFinder aspect_finder;
GList *aspect_data_element;
if (
!gswe_moment_has_planet(moment, planet1)
|| !gswe_moment_has_planet(moment, planet2)
) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_UNKNOWN_PLANET,
"One of the requested planets is not found in the planet list"
);
return NULL;
}
aspect_finder.planet1 = planet1;
aspect_finder.planet2 = planet2;
if ((aspect_data_element = g_list_find_custom(
moment->priv->aspect_list,
&aspect_finder,
(GCompareFunc)find_aspect_by_both_planets
)) != NULL) {
return aspect_data_element->data;
}
return NULL;
}
static gint
find_antiscion_by_both_planets(
GsweAntiscionData *antiscion,
struct GsweAspectFinder *antiscion_finder)
{
if (
(
(antiscion->planet1->planet_info->planet
== antiscion_finder->planet1)
&& (antiscion->planet2->planet_info->planet
== antiscion_finder->planet2)
)
|| (
(antiscion->planet1->planet_info->planet
== antiscion_finder->planet2)
&& (antiscion->planet2->planet_info->planet
== antiscion_finder->planet1)
)
) {
return 0;
}
return 1;
}
static void
gswe_moment_calculate_antiscia(GsweMoment *moment)
{
GList *oplanet,
*iplanet;
if (moment->priv->antiscia_revision == moment->priv->revision) {
return;
}
gswe_moment_calculate_all_planets(moment);
g_list_free_full(
moment->priv->antiscia_list,
(GDestroyNotify)gswe_antiscion_data_unref
);
moment->priv->antiscia_list = NULL;
for (
oplanet = moment->priv->planet_list;
oplanet;
oplanet = g_list_next(oplanet)
) {
for (
iplanet = moment->priv->planet_list;
iplanet;
iplanet = g_list_next(iplanet)
) {
GswePlanetData *outer_planet = oplanet->data,
*inner_planet = iplanet->data;
struct GsweAspectFinder antiscion_finder;
GsweAntiscionData *antiscion_data;
GList *antiscion_data_element;
if (outer_planet->planet_info->planet
== inner_planet->planet_info->planet
) {
continue;
}
antiscion_finder.planet1 = outer_planet->planet_info->planet;
antiscion_finder.planet2 = inner_planet->planet_info->planet;
if ((antiscion_data_element = g_list_find_custom(
moment->priv->antiscia_list,
&antiscion_finder,
(GCompareFunc)find_antiscion_by_both_planets)
) != NULL) {
gswe_antiscion_data_calculate(antiscion_data_element->data);
} else {
antiscion_data = gswe_antiscion_data_new_with_planets(
inner_planet,
outer_planet
);
moment->priv->antiscia_list = g_list_prepend(
moment->priv->antiscia_list,
antiscion_data
);
}
}
}
moment->priv->antiscia_revision = moment->priv->revision;
}
/**
* gswe_moment_get_all_antiscia:
* @moment: The GsweMoment object to operate on.
*
* Get all found antiscia between planets in @moment.
*
* Returns: (element-type GsweAntiscionData) (transfer none): A #GList of
* #GsweAntiscionData.
*/
GList *
gswe_moment_get_all_antiscia(GsweMoment *moment)
{
gswe_moment_calculate_antiscia(moment);
return moment->priv->antiscia_list;
}
/**
* gswe_moment_get_all_planet_antiscia:
* @moment: The GsweMoment object to operate on.
* @planet: The planet whose antiscion planets are requested.
* @err: a #GError
*
* Get all the antiscion planets on all registered axes for @planet.
*
* Returns: (element-type GsweAntiscionData) (transfer container): a #GList of
* #GsweAntiscionData. The GsweAntiscionData structures belong to
* @moment, but the GList should be freed using g_list_free(). If no
* planet has any antiscia, or the planet has not been added to
* @moment, returns NULL.
*/
GList *
gswe_moment_get_all_planet_antiscia(
GsweMoment *moment,
GswePlanet planet,
GError **err)
{
GList *ret = NULL,
*antiscion_l;
if (!gswe_moment_has_planet(moment, planet)) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_UNKNOWN_PLANET,
"Specified planet is not added to the moment object"
);
return NULL;
}
gswe_moment_calculate_antiscia(moment);
glforeach (antiscion_l, moment->priv->antiscia_list) {
GsweAntiscionData *antiscion_data = antiscion_l->data;
if (
(antiscion_data->planet1->planet_info->planet == planet)
|| (antiscion_data->planet2->planet_info->planet == planet)
) {
ret = g_list_prepend(ret, antiscion_data);
}
}
return ret;
}
/**
* gswe_moment_get_axis_all_antiscia:
* @moment: The GsweMoment object to operate on.
* @axis: The axis on which you want to search for antiscion planets.
*
* Get all the antiscion planets on the specified axis @axis.
*
* Returns: (element-type GsweAntiscionData) (transfer container): a #GList of
* #GsweAntiscionData. The GsweAntiscionData structures belong to
* @moment, but the GList should be freed using g_list_free(). If
* there are no antiscion planets on the given axis, returns NULL.
*/
GList *
gswe_moment_get_axis_all_antiscia(GsweMoment *moment, GsweAntiscionAxis axis)
{
GList *ret = NULL,
*antiscion_l;
gswe_moment_calculate_antiscia(moment);
glforeach (antiscion_l, moment->priv->antiscia_list) {
GsweAntiscionData *antiscion_data = antiscion_l->data;
if (antiscion_data->antiscion_axis_info->axis == axis) {
ret = g_list_prepend(ret, antiscion_data);
}
}
return ret;
}
/**
* gswe_moment_get_axis_planet_antiscia:
* @moment: the GsweMoment object to operate on
* @axis: the axis on which you want to search for antiscion planets
* @planet: the planet whose antiscion planets are requested
* @err: a #GError
*
* Get the antiscion planets of @planet as seen in @axis.
*
* Returns: (element-type GsweAntiscionData) (transfer container): a #GList of
* #GsweAntiscionData. The GsweAntiscionData structires belong to
* @moment, but the GList should be freed using g_list_free(). If the
* planet has no antiscia, or the planet has not been added to
* @moment, returns NULL.
*/
GList *
gswe_moment_get_axis_planet_antiscia(
GsweMoment *moment,
GsweAntiscionAxis axis,
GswePlanet planet,
GError **err)
{
GList *ret = NULL,
*antiscion_l;
if (!gswe_moment_has_planet(moment, planet)) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_UNKNOWN_PLANET,
"Specified planet is not added to the moment object"
);
return NULL;
}
gswe_moment_calculate_antiscia(moment);
glforeach (antiscion_l, moment->priv->antiscia_list) {
GsweAntiscionData *antiscion_data = antiscion_l->data;
if (
(
(antiscion_data->planet1->planet_info->planet == planet)
|| (antiscion_data->planet2->planet_info->planet == planet)
)
&& (antiscion_data->antiscion_axis_info->axis == axis)
) {
ret = g_list_prepend(ret, antiscion_data);
}
}
return ret;
}
/**
* gswe_moment_get_antiscion_by_planets:
* @moment: the GsweMoment to operate on
* @planet1: the first planet
* @planet2: the second planet
* @err: a #GError
*
* Get the aspect between two given planets. The order of @planet1 and @planet2
* doesn’t matter.
*
* Returns: (transfer none): a #GsweAspectData containing the aspect data of the
* two planets. If an error occurs, like when one of the planets are
* not added to the planet list, returns NULL, and @err is set
* accordingly.
*/
GsweAntiscionData *
gswe_moment_get_antiscion_by_planets(
GsweMoment *moment,
GswePlanet planet1,
GswePlanet planet2,
GError **err)
{
struct GsweAspectFinder antiscion_finder;
GList *antiscion_data_element;
if (
!gswe_moment_has_planet(moment, planet1)
|| !gswe_moment_has_planet(moment, planet2)
) {
g_set_error(
err,
GSWE_ERROR, GSWE_ERROR_UNKNOWN_PLANET,
"One of the planets is not found in the planet list"
);
return NULL;
}
antiscion_finder.planet1 = planet1;
antiscion_finder.planet2 = planet2;
if ((antiscion_data_element = g_list_find_custom(
moment->priv->antiscia_list,
&antiscion_finder,
(GCompareFunc)find_antiscion_by_both_planets
)) != NULL) {
return antiscion_data_element->data;
}
return NULL;
}