1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/**
* 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%ld %s%ld type=bookmark label=\"%s\"\n",lngsign,intlng,latsign,intlat,description);
fprintf(stderr,"\n");
return 0;
}
|
