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/* GNOME canvas based interface to a map using a simple cylindrical proj */
/* */
/* Copyright (C) 1999, 2000 Red Hat, Incorportated */
/* Original work by Michael Fulbright <drmike@redhat.com> */
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <math.h>
#include <string.h>
#include "timezones.h"
TZZoneInfo *
tzinfo_get_for_location (TimeZoneLocation *loc)
{
TZZoneInfo *tzinfo;
gchar *str;
g_return_val_if_fail (loc != NULL, NULL);
g_return_val_if_fail (loc->zone != NULL, NULL);
str = g_strdup_printf ("TZ=%s", loc->zone);
g_print ("%s %s\n",loc->zone, str);
putenv (str);
tzset ();
g_free (str);
tzinfo = g_new0 (TZZoneInfo, 1);
g_print ("%s %s %ld %d\n",tzname[0], tzname[1], timezone, daylight);
/* Currently this solution doesnt seem to work - I get that */
/* America/Phoenix uses daylight savings, which is wrong */
tzinfo->tzname_normal = (tzname[0]) ? g_strdup (tzname[0]) : NULL;
tzinfo->tzname_daylight = (tzname[1]) ? g_strdup (tzname[1]) : NULL;
tzinfo->utc_offset = timezone;
tzinfo->daylight = daylight;
return tzinfo;
}
void
tzinfo_free (TZZoneInfo *tzinfo)
{
g_return_if_fail (tzinfo != NULL);
if (tzinfo->tzname_normal)
g_free (tzinfo->tzname_normal);
if (tzinfo->tzname_daylight)
g_free (tzinfo->tzname_daylight);
g_free (tzinfo);
}
static float
convertPos( gchar *pos, int digits )
{
gchar whole[10];
gchar *fraction;
gint i;
float t1, t2;
if (!pos || strlen(pos) < 4 || digits > 9)
return 0.0;
for (i=0; i < digits+1; i++)
whole[i] = pos[i];
whole[i] = '\0';
fraction = pos+digits+1;
t1 = g_strtod (whole, NULL);
t2 = g_strtod (fraction, NULL);
/* how do I get sign of a float in a portable fashion? */
if (t1 >= 0.0 )
return t1 + t2/pow (10.0, strlen(fraction));
else
return t1 - t2/pow (10.0, strlen(fraction));
}
#if 0
/* Currently not working */
static void
free_tzdata( TimeZoneLocation *tz)
{
if (tz->country)
g_free(tz->country);
if (tz->zone)
g_free(tz->zone);
if (tz->comment)
g_free(tz->comment);
g_free(tz);
}
#endif
static int
compare_country_names (const void * a, const void * b)
{
const TimeZoneLocation *tza = * (TimeZoneLocation **) a;
const TimeZoneLocation *tzb = * (TimeZoneLocation **) b;
return strcmp (tza->zone, tzb->zone);
}
static void
sort_locations_by_country (GPtrArray *locations)
{
qsort (locations->pdata, locations->len, sizeof (gpointer),
compare_country_names);
}
GPtrArray *
loadTZDB( void )
{
GPtrArray *tzdb;
FILE *tzfile;
char buf[4096];
tzfile = fopen (TZ_DATAFILE, "r");
if (!tzfile)
return NULL;
tzdb = g_ptr_array_new ();
while (fgets (buf, sizeof(buf), tzfile)) {
gchar **tmpstrarr;
gchar *latstr, *lngstr, *p;
TimeZoneLocation *loc;
if (*buf == '#')
continue;
g_strchomp(buf);
tmpstrarr = g_strsplit(buf,"\t", 4);
#ifdef DEBUG_ZONEREAD
printf ("country code: %s\nlocaton:%s\ntimezone:%s\ncomment:\%s\n",
tmpstrarr[0], tmpstrarr[1], tmpstrarr[2], tmpstrarr[3]);
#endif
latstr = g_strdup (tmpstrarr[1]);
p = latstr+1;
while (*p != '-' && *p != '+')
p++;
lngstr = g_strdup (p);
*p = '\0';
#ifdef DEBUG_ZONEREAD
printf ("lat: %s\nlong: %s\n",latstr, lngstr);
printf ("lat: %f\nlong: %f\n\n", convertPos (latstr,2), convertPos (lngstr,3));
#endif
loc = g_new( TimeZoneLocation, 1);
loc->country = g_strdup(tmpstrarr[0]);
loc->zone = g_strdup(tmpstrarr[2]);
loc->comment = (tmpstrarr[3]) ? g_strdup(tmpstrarr[3]) : NULL;
loc->latitude = convertPos(latstr,2);
loc->longitude = convertPos(lngstr,3);
g_ptr_array_add (tzdb, (gpointer) loc);
g_free (latstr);
g_free (lngstr);
g_strfreev (tmpstrarr);
}
fclose (tzfile);
/* now sort by country */
sort_locations_by_country (tzdb);
return tzdb;
}
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