/*
* Estimates the total area between the curves f1 and f2 in the interval
* [start, end], with samples taken at the given resolution and the given
* delay applied to f2. The higher the resolution given, the higher better the
* estimate will be, but the computation will also take longer.
*/
double total_area_estimate(void* f1, void* f2, double start, double end,
double resolution, double delay, char* type)
{
if (f1 == NULL || f2 == NULL || !interval_valid(start, end) || resolution <= 0)
return -1;
double current = start, pt = 0;
double sum = 0;
int i = 0;
while(current <= end){
if (strcmp(type, "gauss") == 0){
pt = area_at_point_gauss((gauss_vector*)f1, (gauss_vector*)f2, current, delay);
} else if (strcmp(type, "base") == 0){
pt = area_at_point_base((est_arr*)f1, (est_arr*)f2, current, delay);
}
if (pt != -1){
sum += pt;
++i;
}
current += resolution;
}
return sum/i;
}
/**
* g_time_zone_get_offset:
* @tz: a #GTimeZone
* @interval: an interval within the timezone
*
* Determines the offset to UTC in effect during a particular @interval
* of time in the time zone @tz.
*
* The offset is the number of seconds that you add to UTC time to
* arrive at local time for @tz (ie: negative numbers for time zones
* west of GMT, positive numbers for east).
*
* Returns: the number of seconds that should be added to UTC to get the
* local time in @tz
*
* Since: 2.26
**/
gint32
g_time_zone_get_offset (GTimeZone *tz,
gint interval)
{
g_return_val_if_fail (interval_valid (tz, interval), 0);
if (tz->header == NULL)
return 0;
return interval_offset (tz, interval);
}
/**
* g_time_zone_is_dst:
* @tz: a #GTimeZone
* @interval: an interval within the timezone
*
* Determines if daylight savings time is in effect during a particular
* @interval of time in the time zone @tz.
*
* Returns: %TRUE if daylight savings time is in effect
*
* Since: 2.26
**/
gboolean
g_time_zone_is_dst (GTimeZone *tz,
gint interval)
{
g_return_val_if_fail (interval_valid (tz, interval), FALSE);
if (tz->header == NULL)
return FALSE;
return interval_isdst (tz, interval);
}
/**
* g_time_zone_get_abbreviation:
* @tz: a #GTimeZone
* @interval: an interval within the timezone
*
* Determines the time zone abbreviation to be used during a particular
* @interval of time in the time zone @tz.
*
* For example, in Toronto this is currently "EST" during the winter
* months and "EDT" during the summer months when daylight savings time
* is in effect.
*
* Returns: the time zone abbreviation, which belongs to @tz
*
* Since: 2.26
**/
const gchar *
g_time_zone_get_abbreviation (GTimeZone *tz,
gint interval)
{
g_return_val_if_fail (interval_valid (tz, interval), NULL);
if (tz->header == NULL)
return "UTC";
return tz->abbrs + interval_abbrind (tz, interval);
}
