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/**
* Navit, a modular navigation system.
* Copyright (C) 2005-2009 Navit Team
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program 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 program; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* this program is free software, please use it as you like.
* i am not a programmer, so please have this code reviewed
* to make sure it has nog bugs or ill side efects.
* use at your own risk
* compile it with: gcc -l m -o latlon2bookmark latlon2bookmark.c
* Credits for this work goes to edje in #navit
**/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
int main( int argc, char **argv )
{
char description[256];
char lngsign[10];
char latsign[10];
float lat;
float lng;
long intlat;
long intlng;
int i;
int n;
if ( argc < 4 )
{
printf("\n");
printf("This program converts a lat/lon coordinates pair\n");
printf("into a bookmark you can use with navit.\n");
printf("This program expects 3 arguments in the following order:\n");
printf("Lat, Lon and a description\n");
printf("and will print a bookmark.\n");
printf("for example: latlon2bookmark 51.980344 4.358005 this is my house \n");
printf("\n");
return 1;
}
lat=atof(argv[1]);
lng=atof(argv[2]);
/* concatenate all parts of the description string */
strcpy(description, argv[3]);
n=0;
for (i=4; i < argc; i++)
{
/* add spaces between the parts of the description */
if ( i < argc )
{
strcat(description, " ");
}
strcat(description, argv[i]);
n=n+1;
}
if ( lat < -90 )
{
printf("\n");
printf("The first argument must be the lattitude\n");
printf("and can't be smaller then -90 (southpole)\n");
printf("\n");
return 2;
}
if ( lat > 90 )
{
printf("\n");
printf("The first argument must be the lattitude\n");
printf("and can't be bigger then 90 (northpole)\n");
printf("\n");
return 3;
}
if ( lng < -180 )
{
printf("\n");
printf("The second argument must be the longitude\n");
printf("and can't be smaller then -180 (oposite the 0 meridian)\n");
printf("\n");
return 4;
}
if ( lng > 180 )
{
printf("\n");
printf("The first argument must be the longitude\n");
printf("and can't be bigger then 180 (oposite the 0 meridian)\n");
printf("\n");
return 5;
}
/* convert the longitude to an integer */
intlng=lng*6371000.0*M_PI/180;
/* aparently if inlng < 0 , inlng needs to be inverted and a - sign used in the output */
strcpy(lngsign, "0x");
if ( intlng < 0)
{
intlng=(intlng ^ 0xffffffff);
strcpy(lngsign, "-0x");
}
/* and the same for the latitude */
intlat=log(tan(M_PI_4+lat*M_PI/360))*6371000.0;
/* aparently if inlat < 0 , inlat needs to be inverted and a - sign used in the output */
strcpy(latsign, "0x");
if ( intlat < 0)
{
intlat=(intlat ^ 0xffffffff);
strcpy(latsign, "-0x");
}
/* print the bookmark */
fprintf(stderr,"\n");
fprintf(stdout,"mg:%s%x %s%x type=bookmark label=\"%s\"\n",lngsign,intlng,latsign,intlat,description);
fprintf(stderr,"\n");
return 0;
}
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