/[zanavi_public1]/navit/navit/projection.c
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Contents of /navit/navit/projection.c

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Revision 2 - (show annotations) (download)
Fri Oct 28 21:19:04 2011 UTC (8 years, 2 months ago) by zoff99
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1 /**
2 * Navit, a modular navigation system.
3 * Copyright (C) 2005-2008 Navit Team
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * version 2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #include <string.h>
21 #include <glib.h>
22 #include "coord.h"
23 #include "debug.h"
24 #include "projection.h"
25
26 struct projection_name {
27 enum projection projection;
28 char *name;
29 };
30
31
32 struct projection_name projection_names[]={
33 {projection_none, ""},
34 {projection_mg, "mg"},
35 {projection_garmin, "garmin"},
36 {projection_utm, "utm"},
37 {projection_gk, "gk"},
38 };
39
40
41 enum projection
42 projection_from_name(const char *name, struct coord *offset)
43 {
44 int i;
45 int zone;
46 char ns;
47
48 for (i=0 ; i < sizeof(projection_names)/sizeof(struct projection_name) ; i++) {
49 if (! strcmp(projection_names[i].name, name))
50 return projection_names[i].projection;
51 }
52 if (offset) {
53 if (sscanf(name,"utm%d%c",&zone,&ns) == 2 && zone > 0 && zone <= 60 && (ns == 'n' || ns == 's')) {
54 offset->x=zone*1000000;
55 offset->y=(ns == 's' ? -10000000:0);
56 return projection_utm;
57 }
58 }
59 return projection_none;
60 }
61
62 char *
63 projection_to_name(enum projection proj, struct coord *offset)
64 {
65 int i;
66
67 for (i=0 ; i < sizeof(projection_names)/sizeof(struct projection_name) ; i++) {
68 if (projection_names[i].projection == proj)
69 return projection_names[i].name;
70 }
71 return NULL;
72 }
73

   
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