trunk/src/gps.c

/*
 * Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
 *
 * This file is part of OSM2Go.
 *
 * OSM2Go is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * OSM2Go 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 OSM2Go.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <string.h>
#include <math.h>

#include "appdata.h"

#ifdef ENABLE_LIBLOCATION

#include <location/location-gps-device.h>

gboolean gps_get_pos(appdata_t *appdata, pos_t *pos, float *alt) {
  if(!appdata->gps_enabled)
    return FALSE;

  gps_state_t *gps_state = appdata->gps_state;

  if(!gps_state->fix)
    return FALSE;

  if(pos) {
    pos->lat = gps_state->latitude;
    pos->lon = gps_state->longitude;
  }

  if(alt) 
    *alt = gps_state->altitude;

  return TRUE;
}

static void
location_changed(LocationGPSDevice *device, gps_state_t *gps_state) {

  gps_state->fix = 
    (device->fix->fields & LOCATION_GPS_DEVICE_LATLONG_SET);
  
  if(gps_state->fix) {
    gps_state->latitude = device->fix->latitude;
    gps_state->longitude = device->fix->longitude;
  }

  if(device->fix->fields & LOCATION_GPS_DEVICE_ALTITUDE_SET)
    gps_state->altitude = device->fix->altitude;
  else
    gps_state->altitude = NAN;
}

void gps_init(appdata_t *appdata) {
  gps_state_t *gps_state = appdata->gps_state = g_new0(gps_state_t, 1);

  printf("GPS init: Using liblocation\n");

  gps_state->device = g_object_new(LOCATION_TYPE_GPS_DEVICE, NULL);  
  if(!gps_state->device) {
    printf("Unable to connect to liblocation\n");
    return;
  }

  gps_state->idd_changed = 
    g_signal_connect(gps_state->device, "changed", 
                     G_CALLBACK(location_changed), gps_state);

#if MAEMO_VERSION_MAJOR < 5
  gps_state->control = location_gpsd_control_get_default();

  if(appdata->gps_enabled && gps_state->control && 
     gps_state->control->can_control) {
    printf("Having control over GPSD and GPS is to be enabled, starting it\n");
    location_gpsd_control_start(gps_state->control);
  }
#endif
}

void gps_release(appdata_t *appdata) { 
  gps_state_t *gps_state = appdata->gps_state;

  if(!gps_state->device) return;

#if MAEMO_VERSION_MAJOR < 5
  if(gps_state->control && gps_state->control->can_control) {
    printf("Having control over GPSD, stopping it\n");
    location_gpsd_control_stop(gps_state->control);
  }
#endif

  /* Disconnect signal */
  g_signal_handler_disconnect(gps_state->device, gps_state->idd_changed);

  g_free(appdata->gps_state);
  appdata->gps_state = NULL;
}

void gps_enable(appdata_t *appdata, gboolean enable) {
  appdata->gps_enabled = enable;

#if MAEMO_VERSION_MAJOR < 5
  gps_state_t *gps_state = appdata->gps_state;
  if(gps_state->control && gps_state->control->can_control) {
    printf("Having control over GPSD, %sing it\n",
           enable?"start":"stop");

    if(enable)
      location_gpsd_control_start(gps_state->control);
    else
      location_gpsd_control_stop(gps_state->control);
  }
#endif
}

#else  // ENABLE_LIBLOCATION

#ifdef ENABLE_GPSBT
#include <gpsbt.h>
#include <gpsmgr.h>
#include <errno.h>
#endif

/* maybe user configurable later on ... */
#define GPSD_HOST "127.0.0.1"
#define GPSD_PORT 2947

gboolean gps_get_pos(appdata_t *appdata, pos_t *pos, float *alt) {
  if(pos) pos->lat = NAN;

  g_mutex_lock(appdata->gps_state->mutex);
  if(appdata->gps_state->gpsdata.set & STATUS_SET) {
    if(appdata->gps_state->gpsdata.status != STATUS_NO_FIX) {
      if(appdata->gps_state->gpsdata.set & LATLON_SET) 
        *pos = appdata->gps_state->gpsdata.fix.pos;
      if(appdata->gps_state->gpsdata.set & ALTITUDE_SET) 
        *alt = appdata->gps_state->gpsdata.fix.alt;
    }
  }
  
  g_mutex_unlock(appdata->gps_state->mutex);
  
  return(!isnan(pos->lat));
}

static int gps_connect(gps_state_t *gps_state) {
  GnomeVFSResult vfs_result;
#ifdef ENABLE_GPSBT
  char errstr[256] = "";

  /* We need to start gpsd (via gpsbt) first. */
  memset(&gps_state->context, 0, sizeof(gpsbt_t));
  errno = 0;

  if(gpsbt_start(NULL, 0, 0, 0, errstr, sizeof(errstr),
                 0, &gps_state->context) < 0) {
    printf("Error connecting to GPS receiver: (%d) %s (%s)\n",
           errno, strerror(errno), errstr);
  }
#endif

  /************** from here down pure gnome/gtk/gpsd ********************/

  /* try to connect to gpsd */
  /* Create a socket to interact with GPSD. */

  printf("GPSD: trying to connect to %s %d\n", GPSD_HOST, GPSD_PORT);

  int retries = 5;
  while(retries && 
        (GNOME_VFS_OK != (vfs_result = gnome_vfs_inet_connection_create(
                &gps_state->iconn, GPSD_HOST, GPSD_PORT, NULL)))) {
    printf("Error creating connection to GPSD, retrying ...\n");

    retries--;
    sleep(1);
  }

  if(!retries) {
    printf("Finally failed ...\n");
    return -1;
  }

  retries = 5;
  while(retries && ((gps_state->socket = 
     gnome_vfs_inet_connection_to_socket(gps_state->iconn)) == NULL)) {
    printf("Error creating connecting GPSD socket, retrying ...\n");

    retries--;
    sleep(1);
  }

  if(!retries) {
    printf("Finally failed ...\n");
    gnome_vfs_inet_connection_destroy(gps_state->iconn, NULL);
    return -1;
  }

  GTimeVal timeout = { 10, 0 };
  if(GNOME_VFS_OK != (vfs_result = gnome_vfs_socket_set_timeout(
        gps_state->socket, &timeout, NULL))) {
    printf("Error setting GPSD timeout\n");
    gnome_vfs_inet_connection_destroy(gps_state->iconn, NULL);
    return -1;
  } 

  printf("GPSD connected ...\n");

  return 0;
}       

void gps_clear_fix(struct gps_fix_t *fixp) {
  fixp->mode = MODE_NOT_SEEN;
  fixp->pos.lat = fixp->pos.lon = NAN;
  fixp->alt = NAN;
  fixp->eph = NAN;
}

/* unpack a daemon response into a status structure */
static void gps_unpack(char *buf, struct gps_data_t *gpsdata) {
  char *ns, *sp, *tp;

  for(ns = buf; ns; ns = strstr(ns+1, "GPSD")) {
    if(strncmp(ns, "GPSD", 4) == 0) {
      /* the following should execute each time we have a good next sp */
      for (sp = ns + 5; *sp != '\0'; sp = tp+1) {
        tp = sp + strcspn(sp, ",\r\n");
        if (*tp == '\0') tp--;
        else *tp = '\0';
        
        switch (*sp) {
        case 'O':
          if (sp[2] == '?') {
            gpsdata->set = 
              (gpsdata->set & SATELLITE_SET) | // fix for below
              MODE_SET | STATUS_SET;  // this clears sat info??
            gpsdata->status = STATUS_NO_FIX;
            gps_clear_fix(&gpsdata->fix);
          } else {
            struct gps_fix_t nf;
            char tag[MAXTAGLEN+1], alt[20], eph[20], lat[20], lon[20], mode[2];
            int st = sscanf(sp+2, 
                            "%8s %*s %*s %19s %19s "
                            "%19s %19s %*s %*s %*s %*s "
                            "%*s %*s %*s %1s",
                            tag, lat, lon,
                            alt, eph,
                            mode);
            if (st >= 5) {
#define DEFAULT(val) (val[0] == '?') ? NAN : g_ascii_strtod(val, NULL)
              nf.pos.lat = DEFAULT(lat);
              nf.pos.lon = DEFAULT(lon);
              nf.eph = DEFAULT(eph);
              nf.alt = DEFAULT(alt);
#undef DEFAULT
              if (st >= 6)
                nf.mode = (mode[0] == '?') ? MODE_NOT_SEEN : atoi(mode);
              else
                nf.mode = (alt[0] == '?') ? MODE_2D : MODE_3D;
              gpsdata->fix = nf;
              gpsdata->set |= LATLON_SET|MODE_SET;
              gpsdata->status = STATUS_FIX;
              gpsdata->set |= STATUS_SET;

              if(alt[0] != '?')
                gpsdata->set |= ALTITUDE_SET;
            }
          }
          break;
        }
      }
    }
  }
}

void gps_enable(appdata_t *appdata, gboolean enable) {
  appdata->gps_enabled = enable;
}

gpointer gps_thread(gpointer data) {
  GnomeVFSFileSize bytes_read;
  GnomeVFSResult vfs_result;
  char str[512];
  appdata_t *appdata = (appdata_t*)data;

  const char *msg = "o\r\n";   /* pos request */

  appdata->gps_state->gpsdata.set = 0;

  gboolean connected = FALSE;

  while(1) {
    if(appdata->gps_enabled) {
      if(!connected) {
        printf("trying to connect\n");

        if(gps_connect(appdata->gps_state) < 0)
          sleep(10);
        else 
          connected = TRUE;
      } else {
        if(GNOME_VFS_OK == 
           (vfs_result = gnome_vfs_socket_write(appdata->gps_state->socket,
                      msg, strlen(msg)+1, &bytes_read, NULL))) {

          /* update every second, wait here to make sure a complete */
          /* reply is received */
          sleep(1);
          
          if(bytes_read == (strlen(msg)+1)) {
            vfs_result = gnome_vfs_socket_read(appdata->gps_state->socket,
                               str, sizeof(str)-1, &bytes_read, NULL);
            if(vfs_result == GNOME_VFS_OK) {
              str[bytes_read] = 0; 
            
              printf("msg: %s (%d)\n", str, strlen(str));
              
              g_mutex_lock(appdata->gps_state->mutex);
              
              appdata->gps_state->gpsdata.set &= 
                ~(LATLON_SET|MODE_SET|STATUS_SET);
            
              gps_unpack(str, &appdata->gps_state->gpsdata);
              g_mutex_unlock(appdata->gps_state->mutex);
            }
          }
        }
      }
    } else {
      if(connected) {
        printf("stopping GPS connection due to user request\n");
        gnome_vfs_inet_connection_destroy(appdata->gps_state->iconn, NULL);

#ifdef ENABLE_GPSBT
        gpsbt_stop(&appdata->gps_state->context);
#endif
        connected = FALSE;
      } else
        sleep(1);
    }
  }

  printf("GPS thread ended???\n");
  return NULL;
}

void gps_init(appdata_t *appdata) {
  appdata->gps_state = g_new0(gps_state_t, 1);

  printf("GPS init: Using gpsd\n");

  /* start a new thread to listen to gpsd */
  appdata->gps_state->mutex = g_mutex_new();
  appdata->gps_state->thread_p = 
    g_thread_create(gps_thread, appdata, FALSE, NULL);
}

void gps_release(appdata_t *appdata) { 
#ifdef ENABLE_GPSBT
  gpsbt_stop(&appdata->gps_state->context);
#endif
  g_free(appdata->gps_state);
  appdata->gps_state = NULL;
}

#endif // ENABLE_LIBLOCATION
1	/*
2	* Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
3	*
4	* This file is part of OSM2Go.
5	*
6	* OSM2Go is free software: you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation, either version 3 of the License, or
9	* (at your option) any later version.
10	*
11	* OSM2Go is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with OSM2Go. If not, see <http://www.gnu.org/licenses/>.
18	*/
19
20	#include <stdio.h>
21	#include <string.h>
22	#include <math.h>
23
24	#include "appdata.h"
25
26	#ifdef ENABLE_LIBLOCATION
27
28	#include <location/location-gps-device.h>
29
30	gboolean gps_get_pos(appdata_t appdata, pos_t pos, float *alt) {
31	if(!appdata->gps_enabled)
32	return FALSE;
33
34	gps_state_t *gps_state = appdata->gps_state;
35
36	if(!gps_state->fix)
37	return FALSE;
38
39	if(pos) {
40	pos->lat = gps_state->latitude;
41	pos->lon = gps_state->longitude;
42	}
43
44	if(alt)
45	*alt = gps_state->altitude;
46
47	return TRUE;
48	}
49
50	static void
51	location_changed(LocationGPSDevice device, gps_state_t gps_state) {
52
53	gps_state->fix =
54	(device->fix->fields & LOCATION_GPS_DEVICE_LATLONG_SET);
55
56	if(gps_state->fix) {
57	gps_state->latitude = device->fix->latitude;
58	gps_state->longitude = device->fix->longitude;
59	}
60
61	if(device->fix->fields & LOCATION_GPS_DEVICE_ALTITUDE_SET)
62	gps_state->altitude = device->fix->altitude;
63	else
64	gps_state->altitude = NAN;
65	}
66
67	void gps_init(appdata_t *appdata) {
68	gps_state_t *gps_state = appdata->gps_state = g_new0(gps_state_t, 1);
69
70	printf("GPS init: Using liblocation\n");
71
72	gps_state->device = g_object_new(LOCATION_TYPE_GPS_DEVICE, NULL);
73	if(!gps_state->device) {
74	printf("Unable to connect to liblocation\n");
75	return;
76	}
77
78	gps_state->idd_changed =
79	g_signal_connect(gps_state->device, "changed",
80	G_CALLBACK(location_changed), gps_state);
81
82	#if MAEMO_VERSION_MAJOR < 5
83	gps_state->control = location_gpsd_control_get_default();
84
85	if(appdata->gps_enabled && gps_state->control &&
86	gps_state->control->can_control) {
87	printf("Having control over GPSD and GPS is to be enabled, starting it\n");
88	location_gpsd_control_start(gps_state->control);
89	}
90	#endif
91	}
92
93	void gps_release(appdata_t *appdata) {
94	gps_state_t *gps_state = appdata->gps_state;
95
96	if(!gps_state->device) return;
97
98	#if MAEMO_VERSION_MAJOR < 5
99	if(gps_state->control && gps_state->control->can_control) {
100	printf("Having control over GPSD, stopping it\n");
101	location_gpsd_control_stop(gps_state->control);
102	}
103	#endif
104
105	/* Disconnect signal */
106	g_signal_handler_disconnect(gps_state->device, gps_state->idd_changed);
107
108	g_free(appdata->gps_state);
109	appdata->gps_state = NULL;
110	}
111
112	void gps_enable(appdata_t *appdata, gboolean enable) {
113	appdata->gps_enabled = enable;
114
115	#if MAEMO_VERSION_MAJOR < 5
116	gps_state_t *gps_state = appdata->gps_state;
117	if(gps_state->control && gps_state->control->can_control) {
118	printf("Having control over GPSD, %sing it\n",
119	enable?"start":"stop");
120
121	if(enable)
122	location_gpsd_control_start(gps_state->control);
123	else
124	location_gpsd_control_stop(gps_state->control);
125	}
126	#endif
127	}
128
129	#else // ENABLE_LIBLOCATION
130
131	#ifdef ENABLE_GPSBT
132	#include <gpsbt.h>
133	#include <gpsmgr.h>
134	#include <errno.h>
135	#endif
136
137	/* maybe user configurable later on ... */
138	#define GPSD_HOST "127.0.0.1"
139	#define GPSD_PORT 2947
140
141	gboolean gps_get_pos(appdata_t appdata, pos_t pos, float *alt) {
142	if(pos) pos->lat = NAN;
143
144	g_mutex_lock(appdata->gps_state->mutex);
145	if(appdata->gps_state->gpsdata.set & STATUS_SET) {
146	if(appdata->gps_state->gpsdata.status != STATUS_NO_FIX) {
147	if(appdata->gps_state->gpsdata.set & LATLON_SET)
148	*pos = appdata->gps_state->gpsdata.fix.pos;
149	if(appdata->gps_state->gpsdata.set & ALTITUDE_SET)
150	*alt = appdata->gps_state->gpsdata.fix.alt;
151	}
152	}
153
154	g_mutex_unlock(appdata->gps_state->mutex);
155
156	return(!isnan(pos->lat));
157	}
158
159	static int gps_connect(gps_state_t *gps_state) {
160	GnomeVFSResult vfs_result;
161	#ifdef ENABLE_GPSBT
162	char errstr[256] = "";
163
164	/* We need to start gpsd (via gpsbt) first. */
165	memset(&gps_state->context, 0, sizeof(gpsbt_t));
166	errno = 0;
167
168	if(gpsbt_start(NULL, 0, 0, 0, errstr, sizeof(errstr),
169	0, &gps_state->context) < 0) {
170	printf("Error connecting to GPS receiver: (%d) %s (%s)\n",
171	errno, strerror(errno), errstr);
172	}
173	#endif
174
175	/************ from here down pure gnome/gtk/gpsd ******************/
176
177	/* try to connect to gpsd */
178	/* Create a socket to interact with GPSD. */
179
180	printf("GPSD: trying to connect to %s %d\n", GPSD_HOST, GPSD_PORT);
181
182	int retries = 5;
183	while(retries &&
184	(GNOME_VFS_OK != (vfs_result = gnome_vfs_inet_connection_create(
185	&gps_state->iconn, GPSD_HOST, GPSD_PORT, NULL)))) {
186	printf("Error creating connection to GPSD, retrying ...\n");
187
188	retries--;
189	sleep(1);
190	}
191
192	if(!retries) {
193	printf("Finally failed ...\n");
194	return -1;
195	}
196
197	retries = 5;
198	while(retries && ((gps_state->socket =
199	gnome_vfs_inet_connection_to_socket(gps_state->iconn)) == NULL)) {
200	printf("Error creating connecting GPSD socket, retrying ...\n");
201
202	retries--;
203	sleep(1);
204	}
205
206	if(!retries) {
207	printf("Finally failed ...\n");
208	gnome_vfs_inet_connection_destroy(gps_state->iconn, NULL);
209	return -1;
210	}
211
212	GTimeVal timeout = { 10, 0 };
213	if(GNOME_VFS_OK != (vfs_result = gnome_vfs_socket_set_timeout(
214	gps_state->socket, &timeout, NULL))) {
215	printf("Error setting GPSD timeout\n");
216	gnome_vfs_inet_connection_destroy(gps_state->iconn, NULL);
217	return -1;
218	}
219
220	printf("GPSD connected ...\n");
221
222	return 0;
223	}
224
225	void gps_clear_fix(struct gps_fix_t *fixp) {
226	fixp->mode = MODE_NOT_SEEN;
227	fixp->pos.lat = fixp->pos.lon = NAN;
228	fixp->alt = NAN;
229	fixp->eph = NAN;
230	}
231
232	/* unpack a daemon response into a status structure */
233	static void gps_unpack(char buf, struct gps_data_t gpsdata) {
234	char ns, sp, *tp;
235
236	for(ns = buf; ns; ns = strstr(ns+1, "GPSD")) {
237	if(strncmp(ns, "GPSD", 4) == 0) {
238	/* the following should execute each time we have a good next sp */
239	for (sp = ns + 5; *sp != '\0'; sp = tp+1) {
240	tp = sp + strcspn(sp, ",\r\n");
241	if (*tp == '\0') tp--;
242	else *tp = '\0';
243
244	switch (*sp) {
245	case 'O':
246	if (sp[2] == '?') {
247	gpsdata->set =
248	(gpsdata->set & SATELLITE_SET) \| // fix for below
249	MODE_SET \| STATUS_SET; // this clears sat info??
250	gpsdata->status = STATUS_NO_FIX;
251	gps_clear_fix(&gpsdata->fix);
252	} else {
253	struct gps_fix_t nf;
254	char tag[MAXTAGLEN+1], alt[20], eph[20], lat[20], lon[20], mode[2];
255	int st = sscanf(sp+2,
256	"%8s %s %s %19s %19s "
257	"%19s %19s %s %s %s %s "
258	"%s %s %*s %1s",
259	tag, lat, lon,
260	alt, eph,
261	mode);
262	if (st >= 5) {
263	#define DEFAULT(val) (val[0] == '?') ? NAN : g_ascii_strtod(val, NULL)
264	nf.pos.lat = DEFAULT(lat);
265	nf.pos.lon = DEFAULT(lon);
266	nf.eph = DEFAULT(eph);
267	nf.alt = DEFAULT(alt);
268	#undef DEFAULT
269	if (st >= 6)
270	nf.mode = (mode[0] == '?') ? MODE_NOT_SEEN : atoi(mode);
271	else
272	nf.mode = (alt[0] == '?') ? MODE_2D : MODE_3D;
273	gpsdata->fix = nf;
274	gpsdata->set \|= LATLON_SET\|MODE_SET;
275	gpsdata->status = STATUS_FIX;
276	gpsdata->set \|= STATUS_SET;
277
278	if(alt[0] != '?')
279	gpsdata->set \|= ALTITUDE_SET;
280	}
281	}
282	break;
283	}
284	}
285	}
286	}
287	}
288
289	void gps_enable(appdata_t *appdata, gboolean enable) {
290	appdata->gps_enabled = enable;
291	}
292
293	gpointer gps_thread(gpointer data) {
294	GnomeVFSFileSize bytes_read;
295	GnomeVFSResult vfs_result;
296	char str[512];
297	appdata_t appdata = (appdata_t)data;
298
299	const char msg = "o\r\n"; / pos request */
300
301	appdata->gps_state->gpsdata.set = 0;
302
303	gboolean connected = FALSE;
304
305	while(1) {
306	if(appdata->gps_enabled) {
307	if(!connected) {
308	printf("trying to connect\n");
309
310	if(gps_connect(appdata->gps_state) < 0)
311	sleep(10);
312	else
313	connected = TRUE;
314	} else {
315	if(GNOME_VFS_OK ==
316	(vfs_result = gnome_vfs_socket_write(appdata->gps_state->socket,
317	msg, strlen(msg)+1, &bytes_read, NULL))) {
318
319	/* update every second, wait here to make sure a complete */
320	/* reply is received */
321	sleep(1);
322
323	if(bytes_read == (strlen(msg)+1)) {
324	vfs_result = gnome_vfs_socket_read(appdata->gps_state->socket,
325	str, sizeof(str)-1, &bytes_read, NULL);
326	if(vfs_result == GNOME_VFS_OK) {
327	str[bytes_read] = 0;
328
329	printf("msg: %s (%d)\n", str, strlen(str));
330
331	g_mutex_lock(appdata->gps_state->mutex);
332
333	appdata->gps_state->gpsdata.set &=
334	~(LATLON_SET\|MODE_SET\|STATUS_SET);
335
336	gps_unpack(str, &appdata->gps_state->gpsdata);
337	g_mutex_unlock(appdata->gps_state->mutex);
338	}
339	}
340	}
341	}
342	} else {
343	if(connected) {
344	printf("stopping GPS connection due to user request\n");
345	gnome_vfs_inet_connection_destroy(appdata->gps_state->iconn, NULL);
346
347	#ifdef ENABLE_GPSBT
348	gpsbt_stop(&appdata->gps_state->context);
349	#endif
350	connected = FALSE;
351	} else
352	sleep(1);
353	}
354	}
355
356	printf("GPS thread ended???\n");
357	return NULL;
358	}
359
360	void gps_init(appdata_t *appdata) {
361	appdata->gps_state = g_new0(gps_state_t, 1);
362
363	printf("GPS init: Using gpsd\n");
364
365	/* start a new thread to listen to gpsd */
366	appdata->gps_state->mutex = g_mutex_new();
367	appdata->gps_state->thread_p =
368	g_thread_create(gps_thread, appdata, FALSE, NULL);
369	}
370
371	void gps_release(appdata_t *appdata) {
372	#ifdef ENABLE_GPSBT
373	gpsbt_stop(&appdata->gps_state->context);
374	#endif
375	g_free(appdata->gps_state);
376	appdata->gps_state = NULL;
377	}
378
379	#endif // ENABLE_LIBLOCATION