2 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
4 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
6 * Some of the code adapted from GPSBabel 1.2.7
7 * http://gpsbabel.sf.net/
8 * Copyright (C) 2002, 2003, 2004, 2005 Robert Lipe, robertlipe@usa.net
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #define _XOPEN_SOURCE /* glibc2 needs this */
53 tt_wpt_link, /* New in GPX 1.1 */
61 tt_trk_trkseg_trkpt_ele,
62 tt_trk_trkseg_trkpt_time,
64 tt_trk_trkseg_trkpt_course,
65 tt_trk_trkseg_trkpt_speed,
66 tt_trk_trkseg_trkpt_fix,
67 tt_trk_trkseg_trkpt_sat,
74 typedef struct tag_mapping {
75 tag_type tag_type; /* enum from above for this tag */
76 const char *tag_name; /* xpath-ish tag name */
80 GpxWritingOptions *options;
85 * xpath(ish) mappings between full tag paths and internal identifers.
86 * These appear in the order they appear in the GPX specification.
87 * If it's not a tag we explictly handle, it doesn't go here.
90 tag_mapping tag_path_map[] = {
92 { tt_wpt, "/gpx/wpt" },
94 { tt_waypoint, "/loc/waypoint" },
95 { tt_waypoint_coord, "/loc/waypoint/coord" },
96 { tt_waypoint_name, "/loc/waypoint/name" },
98 { tt_wpt_ele, "/gpx/wpt/ele" },
99 { tt_wpt_name, "/gpx/wpt/name" },
100 { tt_wpt_desc, "/gpx/wpt/desc" },
101 { tt_wpt_sym, "/gpx/wpt/sym" },
102 { tt_wpt_sym, "/loc/waypoint/type" },
103 { tt_wpt_link, "/gpx/wpt/link" }, /* GPX 1.1 */
105 { tt_trk, "/gpx/trk" },
106 { tt_trk, "/gpx/rte" },
107 { tt_trk_name, "/gpx/trk/name" },
108 { tt_trk_desc, "/gpx/trk/desc" },
109 { tt_trk_trkseg, "/gpx/trk/trkseg" },
110 { tt_trk_trkseg_trkpt, "/gpx/trk/trkseg/trkpt" },
111 { tt_trk_trkseg_trkpt, "/gpx/rte/rtept" },
112 { tt_trk_trkseg_trkpt_ele, "/gpx/trk/trkseg/trkpt/ele" },
113 { tt_trk_trkseg_trkpt_time, "/gpx/trk/trkseg/trkpt/time" },
115 { tt_trk_trkseg_trkpt_course, "/gpx/trk/trkseg/trkpt/course" },
116 { tt_trk_trkseg_trkpt_speed, "/gpx/trk/trkseg/trkpt/speed" },
117 { tt_trk_trkseg_trkpt_fix, "/gpx/trk/trkseg/trkpt/fix" },
118 { tt_trk_trkseg_trkpt_sat, "/gpx/trk/trkseg/trkpt/sat" },
123 static tag_type get_tag(const char *t)
126 for (tm = tag_path_map; tm->tag_type != 0; tm++)
127 if (0 == strcmp(tm->tag_name, t))
132 /******************************************/
134 tag_type current_tag = tt_unknown;
135 GString *xpath = NULL;
136 GString *c_cdata = NULL;
138 /* current ("c_") objects */
139 VikTrackpoint *c_tp = NULL;
140 VikWaypoint *c_wp = NULL;
141 VikTrack *c_tr = NULL;
143 gchar *c_wp_name = NULL;
144 gchar *c_tr_name = NULL;
146 /* temporary things so we don't have to create them lots of times */
147 const gchar *c_slat, *c_slon;
150 /* specialty flags / etc */
151 gboolean f_tr_newseg;
152 guint unnamed_waypoints = 0;
153 guint unnamed_tracks = 0;
156 static const char *get_attr ( const char **attr, const char *key )
159 if ( strcmp(*attr,key) == 0 )
166 static gboolean set_c_ll ( const char **attr )
168 if ( (c_slat = get_attr ( attr, "lat" )) && (c_slon = get_attr ( attr, "lon" )) ) {
169 c_ll.lat = g_strtod(c_slat, NULL);
170 c_ll.lon = g_strtod(c_slon, NULL);
176 static void gpx_start(VikTrwLayer *vtl, const char *el, const char **attr)
178 static const gchar *tmp;
180 g_string_append_c ( xpath, '/' );
181 g_string_append ( xpath, el );
182 current_tag = get_tag ( xpath->str );
184 switch ( current_tag ) {
187 if ( set_c_ll( attr ) ) {
188 c_wp = vik_waypoint_new ();
189 c_wp->altitude = VIK_DEFAULT_ALTITUDE;
190 if ( ! get_attr ( attr, "hidden" ) )
191 c_wp->visible = TRUE;
193 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
198 c_tr = vik_track_new ();
199 if ( ! get_attr ( attr, "hidden" ) )
200 c_tr->visible = TRUE;
207 case tt_trk_trkseg_trkpt:
208 if ( set_c_ll( attr ) ) {
209 c_tp = vik_trackpoint_new ();
210 c_tp->altitude = VIK_DEFAULT_ALTITUDE;
211 vik_coord_load_from_latlon ( &(c_tp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
213 c_tp->newsegment = TRUE;
216 c_tr->trackpoints = g_list_append ( c_tr->trackpoints, c_tp );
220 case tt_trk_trkseg_trkpt_ele:
221 case tt_trk_trkseg_trkpt_time:
228 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer */
232 c_wp = vik_waypoint_new ();
233 c_wp->altitude = VIK_DEFAULT_ALTITUDE;
234 c_wp->visible = TRUE;
237 case tt_waypoint_coord:
238 if ( set_c_ll( attr ) )
239 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
242 case tt_waypoint_name:
243 if ( ( tmp = get_attr(attr, "id") ) ) {
245 g_free ( c_wp_name );
246 c_wp_name = g_strdup ( tmp );
248 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer for description */
255 static void gpx_end(VikTrwLayer *vtl, const char *el)
257 static GTimeVal tp_time;
259 g_string_truncate ( xpath, xpath->len - strlen(el) - 1 );
261 switch ( current_tag ) {
266 c_wp_name = g_strdup_printf("VIKING_WP%d", unnamed_waypoints++);
267 vik_trw_layer_filein_add_waypoint ( vtl, c_wp_name, c_wp );
268 g_free ( c_wp_name );
275 c_tr_name = g_strdup_printf("VIKING_TR%d", unnamed_waypoints++);
276 vik_trw_layer_filein_add_track ( vtl, c_tr_name, c_tr );
277 g_free ( c_tr_name );
284 g_free ( c_wp_name );
285 c_wp_name = g_strdup ( c_cdata->str );
286 g_string_erase ( c_cdata, 0, -1 );
291 g_free ( c_tr_name );
292 c_tr_name = g_strdup ( c_cdata->str );
293 g_string_erase ( c_cdata, 0, -1 );
297 c_wp->altitude = g_strtod ( c_cdata->str, NULL );
298 g_string_erase ( c_cdata, 0, -1 );
301 case tt_trk_trkseg_trkpt_ele:
302 c_tp->altitude = g_strtod ( c_cdata->str, NULL );
303 g_string_erase ( c_cdata, 0, -1 );
306 case tt_waypoint_name: /* .loc name is really description. */
308 vik_waypoint_set_comment ( c_wp, c_cdata->str );
309 g_string_erase ( c_cdata, 0, -1 );
313 vik_waypoint_set_image ( c_wp, c_cdata->str );
314 g_string_erase ( c_cdata, 0, -1 );
318 gchar *tmp_lower = g_utf8_strdown(c_cdata->str, -1); /* for things like <type>Geocache</type> */
319 vik_waypoint_set_symbol ( c_wp, tmp_lower );
320 g_free ( tmp_lower );
321 g_string_erase ( c_cdata, 0, -1 );
326 vik_track_set_comment ( c_tr, c_cdata->str );
327 g_string_erase ( c_cdata, 0, -1 );
330 case tt_trk_trkseg_trkpt_time:
331 if ( g_time_val_from_iso8601(c_cdata->str, &tp_time) ) {
332 c_tp->timestamp = tp_time.tv_sec;
333 c_tp->has_timestamp = TRUE;
335 g_string_erase ( c_cdata, 0, -1 );
338 case tt_trk_trkseg_trkpt_course:
339 c_tp->extended = TRUE;
340 c_tp->course = g_strtod ( c_cdata->str, NULL );
341 g_string_erase ( c_cdata, 0, -1 );
344 case tt_trk_trkseg_trkpt_speed:
345 c_tp->extended = TRUE;
346 c_tp->speed = g_strtod ( c_cdata->str, NULL );
347 g_string_erase ( c_cdata, 0, -1 );
350 case tt_trk_trkseg_trkpt_fix:
351 c_tp->extended = TRUE;
352 if (!strcmp("2d", c_cdata->str))
353 c_tp->fix_mode = VIK_GPS_MODE_2D;
354 else if (!strcmp("3d", c_cdata->str))
355 c_tp->fix_mode = VIK_GPS_MODE_3D;
356 else /* TODO: more fix modes here */
357 c_tp->fix_mode = VIK_GPS_MODE_NOT_SEEN;
358 g_string_erase ( c_cdata, 0, -1 );
361 case tt_trk_trkseg_trkpt_sat:
362 c_tp->extended = TRUE;
363 c_tp->nsats = atoi ( c_cdata->str );
364 g_string_erase ( c_cdata, 0, -1 );
370 current_tag = get_tag ( xpath->str );
373 static void gpx_cdata(void *dta, const XML_Char *s, int len)
375 switch ( current_tag ) {
379 case tt_trk_trkseg_trkpt_ele:
384 case tt_trk_trkseg_trkpt_time:
385 case tt_trk_trkseg_trkpt_course:
386 case tt_trk_trkseg_trkpt_speed:
387 case tt_trk_trkseg_trkpt_fix:
388 case tt_trk_trkseg_trkpt_sat:
389 case tt_waypoint_name: /* .loc name is really description. */
390 g_string_append_len ( c_cdata, s, len );
393 default: break; /* ignore cdata from other things */
397 // make like a "stack" of tag names
398 // like gpspoint's separated like /gpx/wpt/whatever
400 void a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) {
401 XML_Parser parser = XML_ParserCreate(NULL);
404 XML_SetElementHandler(parser, (XML_StartElementHandler) gpx_start, (XML_EndElementHandler) gpx_end);
405 XML_SetUserData(parser, vtl); /* in the future we could remove all global variables */
406 XML_SetCharacterDataHandler(parser, (XML_CharacterDataHandler) gpx_cdata);
410 g_assert ( f != NULL && vtl != NULL );
412 xpath = g_string_new ( "" );
413 c_cdata = g_string_new ( "" );
415 unnamed_waypoints = 0;
419 len = fread(buf, 1, sizeof(buf)-7, f);
420 done = feof(f) || !len;
421 XML_Parse(parser, buf, len, done);
424 XML_ParserFree (parser);
425 g_string_free ( xpath, TRUE );
426 g_string_free ( c_cdata, TRUE );
429 /**** entitize from GPSBabel ****/
437 entity_types stdentities[] = {
439 { "'", "'", 1 },
442 { "\"", """, 0 },
446 void utf8_to_int( const char *cp, int *bytes, int *value )
448 if ( (*cp & 0xe0) == 0xc0 ) {
449 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
451 *value = ((*cp & 0x1f) << 6) |
454 else if ( (*cp & 0xf0) == 0xe0 ) {
455 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
456 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
458 *value = ((*cp & 0x0f) << 12) |
459 ((*(cp+1) & 0x3f) << 6) |
462 else if ( (*cp & 0xf8) == 0xf0 ) {
463 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
464 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
465 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
467 *value = ((*cp & 0x07) << 18) |
468 ((*(cp+1) & 0x3f) << 12) |
469 ((*(cp+2) & 0x3f) << 6) |
472 else if ( (*cp & 0xfc) == 0xf8 ) {
473 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
474 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
475 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
476 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
478 *value = ((*cp & 0x03) << 24) |
479 ((*(cp+1) & 0x3f) << 18) |
480 ((*(cp+2) & 0x3f) << 12) |
481 ((*(cp+3) & 0x3f) << 6) |
484 else if ( (*cp & 0xfe) == 0xfc ) {
485 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
486 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
487 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
488 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
489 if ( (*(cp+5) & 0xc0) != 0x80 ) goto dodefault;
491 *value = ((*cp & 0x01) << 30) |
492 ((*(cp+1) & 0x3f) << 24) |
493 ((*(cp+2) & 0x3f) << 18) |
494 ((*(cp+3) & 0x3f) << 12) |
495 ((*(cp+4) & 0x3f) << 6) |
501 *value = (unsigned char)*cp;
507 entitize(const char * str)
509 int elen, ecount, nsecount;
512 char * p, * tmp, * xstr;
518 elen = ecount = nsecount = 0;
520 /* figure # of entity replacements and additional size. */
523 while ((cp = strstr(cp, ep->text)) != NULL) {
524 elen += strlen(ep->entity) - strlen(ep->text);
526 cp += strlen(ep->text);
531 /* figure the same for other than standard entities (i.e. anything
532 * that isn't in the range U+0000 to U+007F */
533 for ( cp = str; *cp; cp++ ) {
536 utf8_to_int( cp, &bytes, &value );
538 elen += sprintf( tmpsub, "&#x%x;", value ) - bytes;
543 /* enough space for the whole string plus entity replacements, if any */
544 tmp = g_malloc((strlen(str) + elen + 1));
547 /* no entity replacements */
548 if (ecount == 0 && nsecount == 0)
552 for (ep = stdentities; ep->text; ep++) {
554 while ((p = strstr(p, ep->text)) != NULL) {
555 elen = strlen(ep->entity);
557 xstr = g_strdup(p + strlen(ep->text));
559 strcpy(p, ep->entity);
560 strcpy(p + elen, xstr);
569 if ( nsecount != 0 ) {
573 utf8_to_int( p, &bytes, &value );
575 xstr = g_strdup( p + bytes );
580 sprintf( p, "&#x%x;", value );
594 /**** end GPSBabel code ****/
598 static void gpx_write_waypoint ( const gchar *name, VikWaypoint *wp, GpxWritingContext *context )
600 FILE *f = context->file;
601 static struct LatLon ll;
604 vik_coord_to_latlon ( &(wp->coord), &ll );
605 s_lat = a_coords_dtostr( ll.lat );
606 s_lon = a_coords_dtostr( ll.lon );
607 fprintf ( f, "<wpt lat=\"%s\" lon=\"%s\"%s>\n",
608 s_lat, s_lon, wp->visible ? "" : " hidden=\"hidden\"" );
612 tmp = entitize ( name );
613 fprintf ( f, " <name>%s</name>\n", tmp );
616 if ( wp->altitude != VIK_DEFAULT_ALTITUDE )
618 tmp = a_coords_dtostr ( wp->altitude );
619 fprintf ( f, " <ele>%s</ele>\n", tmp );
624 tmp = entitize(wp->comment);
625 fprintf ( f, " <desc>%s</desc>\n", tmp );
630 tmp = entitize(wp->image);
631 fprintf ( f, " <link>%s</link>\n", tmp );
636 tmp = entitize(wp->symbol);
637 fprintf ( f, " <sym>%s</sym>\n", tmp);
641 fprintf ( f, "</wpt>\n" );
644 static void gpx_write_trackpoint ( VikTrackpoint *tp, GpxWritingContext *context )
646 FILE *f = context->file;
647 static struct LatLon ll;
648 gchar *s_lat,*s_lon, *s_alt;
650 vik_coord_to_latlon ( &(tp->coord), &ll );
652 if ( tp->newsegment )
653 fprintf ( f, " </trkseg>\n <trkseg>\n" );
655 s_lat = a_coords_dtostr( ll.lat );
656 s_lon = a_coords_dtostr( ll.lon );
657 fprintf ( f, " <trkpt lat=\"%s\" lon=\"%s\">\n", s_lat, s_lon );
658 g_free ( s_lat ); s_lat = NULL;
659 g_free ( s_lon ); s_lon = NULL;
662 if ( tp->altitude != VIK_DEFAULT_ALTITUDE )
664 s_alt = a_coords_dtostr ( tp->altitude );
666 else if ( context->options != NULL && context->options->force_ele )
668 s_alt = a_coords_dtostr ( 0 );
671 fprintf ( f, " <ele>%s</ele>\n", s_alt );
672 g_free ( s_alt ); s_alt = NULL;
675 if ( tp->has_timestamp ) {
677 timestamp.tv_sec = tp->timestamp;
678 timestamp.tv_usec = 0;
680 time_iso8601 = g_time_val_to_iso8601 ( ×tamp );
682 else if ( context->options != NULL && context->options->force_time )
685 g_get_current_time ( ¤t );
687 time_iso8601 = g_time_val_to_iso8601 ( ¤t );
689 if ( time_iso8601 != NULL )
690 fprintf ( f, " <time>%s</time>\n", time_iso8601 );
691 g_free(time_iso8601);
694 if (tp->extended && (tp->fix_mode >= VIK_GPS_MODE_2D)) {
695 if (!isnan(tp->course)) {
696 gchar *s_course = a_coords_dtostr(tp->course);
697 fprintf ( f, " <course>%s</course>\n", s_course );
700 if (!isnan(tp->speed)) {
701 gchar *s_speed = a_coords_dtostr(tp->speed);
702 fprintf ( f, " <speed>%s</speed>\n", s_speed );
705 if (tp->fix_mode == VIK_GPS_MODE_2D)
706 fprintf ( f, " <fix>2d</fix>\n");
707 if (tp->fix_mode == VIK_GPS_MODE_3D)
708 fprintf ( f, " <fix>3d</fix>\n");
710 fprintf ( f, " <sat>%d</sat>\n", tp->nsats );
713 fprintf ( f, " </trkpt>\n" );
717 static void gpx_write_track ( const gchar *name, VikTrack *t, GpxWritingContext *context )
719 FILE *f = context->file;
721 gboolean first_tp_is_newsegment = FALSE; /* must temporarily make it not so, but we want to restore state. not that it matters. */
723 tmp = entitize ( name );
724 fprintf ( f, "<trk%s>\n <name>%s</name>\n", t->visible ? "" : " hidden=\"hidden\"", tmp );
729 tmp = entitize ( t->comment );
730 fprintf ( f, " <desc>%s</desc>\n", tmp );
734 fprintf ( f, " <trkseg>\n" );
736 if ( t->trackpoints && t->trackpoints->data ) {
737 first_tp_is_newsegment = VIK_TRACKPOINT(t->trackpoints->data)->newsegment;
738 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = FALSE; /* so we won't write </trkseg><trkseg> already */
739 g_list_foreach ( t->trackpoints, (GFunc) gpx_write_trackpoint, context );
740 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = first_tp_is_newsegment; /* restore state */
743 fprintf ( f, "</trkseg>\n</trk>\n" );
746 static void gpx_write_header( FILE *f )
748 fprintf(f, "<?xml version=\"1.0\"?>\n"
749 "<gpx version=\"1.0\" creator=\"Viking -- http://viking.sf.net/\"\n"
750 "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
751 "xmlns=\"http://www.topografix.com/GPX/1/0\"\n"
752 "xsi:schemaLocation=\"http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd\">\n");
755 static void gpx_write_footer( FILE *f )
757 fprintf(f, "</gpx>\n");
765 } gpx_waypoint_and_name;
768 gpx_waypoint_and_name *wps;
771 } gpx_gather_waypoints_passalong_t;
773 /* Type to hold name of track and timestamp of first trackpoint */
775 time_t first_timestamp;
777 } gpx_track_and_timestamp;
780 gpx_track_and_timestamp *trks;
783 } gpx_gather_tracks_passalong_t;
785 static void gpx_collect_waypoint ( const gchar *name, VikWaypoint *wp, gpx_gather_waypoints_passalong_t *passalong )
787 if ( passalong->i < passalong->n_wps ) {
788 passalong->wps[passalong->i].name = name;
789 passalong->wps[passalong->i].wp = wp;
794 /* Function to collect a track and the first timestamp in the list */
795 static void gpx_collect_track (const gchar *name, VikTrack *track, gpx_gather_tracks_passalong_t *passalong)
797 if (passalong->i < passalong->n_trks)
799 VikTrackpoint *first_point = (VikTrackpoint *)track->trackpoints->data;
800 passalong->trks[passalong->i].name = name;
801 passalong->trks[passalong->i].first_timestamp = first_point->timestamp;
806 static int gpx_waypoint_and_name_compar(const void *x, const void *y)
808 gpx_waypoint_and_name *a = (gpx_waypoint_and_name *)x;
809 gpx_waypoint_and_name *b = (gpx_waypoint_and_name *)y;
810 return strcmp(a->name,b->name);
813 /* Function to compare two tracks by their first timestamp */
814 static int gpx_track_and_timestamp_compar(const void *x, const void *y)
816 gpx_track_and_timestamp *a = (gpx_track_and_timestamp *)x;
817 gpx_track_and_timestamp *b = (gpx_track_and_timestamp *)y;
818 if (a->first_timestamp < b->first_timestamp)
822 if (a->first_timestamp > b->first_timestamp)
829 void a_gpx_write_file( VikTrwLayer *vtl, FILE *f )
831 a_gpx_write_file_options(NULL, vtl, f);
834 void a_gpx_write_file_options ( GpxWritingOptions *options, VikTrwLayer *vtl, FILE *f )
836 GpxWritingContext context = { options, f };
839 gpx_write_header ( f );
842 gpx_gather_waypoints_passalong_t passalong;
843 passalong.n_wps = g_hash_table_size ( vik_trw_layer_get_waypoints ( vtl ) );
845 passalong.wps = g_new(gpx_waypoint_and_name,passalong.n_wps);
846 g_hash_table_foreach ( vik_trw_layer_get_waypoints ( vtl ), (GHFunc) gpx_collect_waypoint, &passalong );
847 /* gather waypoints in a list, then sort */
848 qsort(passalong.wps, passalong.n_wps, sizeof(gpx_waypoint_and_name), gpx_waypoint_and_name_compar);
849 for ( i = 0; i < passalong.n_wps; i++ )
850 gpx_write_waypoint ( passalong.wps[i].name, passalong.wps[i].wp, &context);
851 g_free ( passalong.wps );
853 gpx_gather_tracks_passalong_t passalong_tracks;
854 passalong_tracks.n_trks = g_hash_table_size ( vik_trw_layer_get_tracks (vtl) );
855 passalong_tracks.i = 0;
856 passalong_tracks.trks = g_new(gpx_track_and_timestamp,passalong_tracks.n_trks);
857 g_hash_table_foreach (vik_trw_layer_get_tracks(vtl), (GHFunc) gpx_collect_track, &passalong_tracks);
858 /* Sort by timestamp */
859 qsort(passalong_tracks.trks, passalong_tracks.n_trks, sizeof(gpx_track_and_timestamp), gpx_track_and_timestamp_compar);
860 for (i=0;i<passalong_tracks.n_trks; i++)
862 gpx_write_track(passalong_tracks.trks[i].name, (VikTrack *)g_hash_table_lookup(vik_trw_layer_get_tracks(vtl), passalong_tracks.trks[i].name), &context);
864 g_free ( passalong_tracks.trks );
865 gpx_write_footer ( f );
868 void a_gpx_write_track_file ( const gchar *name, VikTrack *t, FILE *f )
870 a_gpx_write_track_file_options ( NULL, name, t, f );
873 void a_gpx_write_track_file_options ( GpxWritingOptions *options, const gchar *name, VikTrack *t, FILE *f )
875 GpxWritingContext context = {options, f};
876 gpx_write_header ( f );
877 gpx_write_track ( name, t, &context );
878 gpx_write_footer ( f );