2 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
4 * Copyright (C) 2003-2007, Evan Battaglia <gtoevan@gmx.net>
5 * Copyright (C) 2007, Quy Tonthat <qtonthat@gmail.com>
6 * Copyright (C) 2008, Hein Ragas <viking@ragas.nl>
7 * Copyright (C) 2009, Tal B <tal.bav@gmail.com>
8 * Copyright (c) 2012, Rob Norris <rw_norris@hotmail.com>
10 * Some of the code adapted from GPSBabel 1.2.7
11 * http://gpsbabel.sf.net/
12 * Copyright (C) 2002, 2003, 2004, 2005 Robert Lipe, robertlipe@usa.net
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 #define _XOPEN_SOURCE /* glibc2 needs this */
59 tt_wpt_link, /* New in GPX 1.1 */
70 tt_trk_trkseg_trkpt_ele,
71 tt_trk_trkseg_trkpt_time,
73 tt_trk_trkseg_trkpt_course,
74 tt_trk_trkseg_trkpt_speed,
75 tt_trk_trkseg_trkpt_fix,
76 tt_trk_trkseg_trkpt_sat,
78 tt_trk_trkseg_trkpt_hdop,
79 tt_trk_trkseg_trkpt_vdop,
80 tt_trk_trkseg_trkpt_pdop,
87 typedef struct tag_mapping {
88 tag_type tag_type; /* enum from above for this tag */
89 const char *tag_name; /* xpath-ish tag name */
93 GpxWritingOptions *options;
98 * xpath(ish) mappings between full tag paths and internal identifers.
99 * These appear in the order they appear in the GPX specification.
100 * If it's not a tag we explictly handle, it doesn't go here.
103 tag_mapping tag_path_map[] = {
105 { tt_wpt, "/gpx/wpt" },
107 { tt_waypoint, "/loc/waypoint" },
108 { tt_waypoint_coord, "/loc/waypoint/coord" },
109 { tt_waypoint_name, "/loc/waypoint/name" },
111 { tt_wpt_ele, "/gpx/wpt/ele" },
112 { tt_wpt_time, "/gpx/wpt/time" },
113 { tt_wpt_name, "/gpx/wpt/name" },
114 { tt_wpt_cmt, "/gpx/wpt/cmt" },
115 { tt_wpt_desc, "/gpx/wpt/desc" },
116 { tt_wpt_sym, "/gpx/wpt/sym" },
117 { tt_wpt_sym, "/loc/waypoint/type" },
118 { tt_wpt_link, "/gpx/wpt/link" }, /* GPX 1.1 */
120 { tt_trk, "/gpx/trk" },
121 { tt_trk_name, "/gpx/trk/name" },
122 { tt_trk_cmt, "/gpx/trk/cmt" },
123 { tt_trk_desc, "/gpx/trk/desc" },
124 { tt_trk_trkseg, "/gpx/trk/trkseg" },
125 { tt_trk_trkseg_trkpt, "/gpx/trk/trkseg/trkpt" },
126 { tt_trk_trkseg_trkpt_ele, "/gpx/trk/trkseg/trkpt/ele" },
127 { tt_trk_trkseg_trkpt_time, "/gpx/trk/trkseg/trkpt/time" },
129 { tt_trk_trkseg_trkpt_course, "/gpx/trk/trkseg/trkpt/course" },
130 { tt_trk_trkseg_trkpt_speed, "/gpx/trk/trkseg/trkpt/speed" },
131 { tt_trk_trkseg_trkpt_fix, "/gpx/trk/trkseg/trkpt/fix" },
132 { tt_trk_trkseg_trkpt_sat, "/gpx/trk/trkseg/trkpt/sat" },
134 { tt_trk_trkseg_trkpt_hdop, "/gpx/trk/trkseg/trkpt/hdop" },
135 { tt_trk_trkseg_trkpt_vdop, "/gpx/trk/trkseg/trkpt/vdop" },
136 { tt_trk_trkseg_trkpt_pdop, "/gpx/trk/trkseg/trkpt/pdop" },
138 { tt_rte, "/gpx/rte" },
139 // NB Route reuses track point feature tags
140 { tt_trk_name, "/gpx/rte/name" },
141 { tt_trk_cmt, "/gpx/rte/cmt" },
142 { tt_trk_desc, "/gpx/rte/desc" },
143 { tt_trk_trkseg_trkpt, "/gpx/rte/rtept" },
144 { tt_trk_trkseg_trkpt_ele, "/gpx/rte/rtept/ele" },
149 static tag_type get_tag(const char *t)
152 for (tm = tag_path_map; tm->tag_type != 0; tm++)
153 if (0 == strcmp(tm->tag_name, t))
158 /******************************************/
160 tag_type current_tag = tt_unknown;
161 GString *xpath = NULL;
162 GString *c_cdata = NULL;
164 /* current ("c_") objects */
165 VikTrackpoint *c_tp = NULL;
166 VikWaypoint *c_wp = NULL;
167 VikTrack *c_tr = NULL;
169 gchar *c_wp_name = NULL;
170 gchar *c_tr_name = NULL;
172 /* temporary things so we don't have to create them lots of times */
173 const gchar *c_slat, *c_slon;
176 /* specialty flags / etc */
177 gboolean f_tr_newseg;
178 guint unnamed_waypoints = 0;
179 guint unnamed_tracks = 0;
180 guint unnamed_routes = 0;
182 static const char *get_attr ( const char **attr, const char *key )
185 if ( strcmp(*attr,key) == 0 )
192 static gboolean set_c_ll ( const char **attr )
194 if ( (c_slat = get_attr ( attr, "lat" )) && (c_slon = get_attr ( attr, "lon" )) ) {
195 c_ll.lat = g_ascii_strtod(c_slat, NULL);
196 c_ll.lon = g_ascii_strtod(c_slon, NULL);
202 static void gpx_start(VikTrwLayer *vtl, const char *el, const char **attr)
204 static const gchar *tmp;
206 g_string_append_c ( xpath, '/' );
207 g_string_append ( xpath, el );
208 current_tag = get_tag ( xpath->str );
210 switch ( current_tag ) {
213 if ( set_c_ll( attr ) ) {
214 c_wp = vik_waypoint_new ();
215 c_wp->visible = TRUE;
216 if ( get_attr ( attr, "hidden" ) )
217 c_wp->visible = FALSE;
219 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
225 c_tr = vik_track_new ();
226 vik_track_set_defaults ( c_tr );
227 c_tr->is_route = (current_tag == tt_rte) ? TRUE : FALSE;
228 c_tr->visible = TRUE;
229 if ( get_attr ( attr, "hidden" ) )
230 c_tr->visible = FALSE;
237 case tt_trk_trkseg_trkpt:
238 if ( set_c_ll( attr ) ) {
239 c_tp = vik_trackpoint_new ();
240 vik_coord_load_from_latlon ( &(c_tp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
242 c_tp->newsegment = TRUE;
245 c_tr->trackpoints = g_list_append ( c_tr->trackpoints, c_tp );
249 case tt_trk_trkseg_trkpt_ele:
250 case tt_trk_trkseg_trkpt_time:
260 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer */
264 c_wp = vik_waypoint_new ();
265 c_wp->visible = TRUE;
268 case tt_waypoint_coord:
269 if ( set_c_ll( attr ) )
270 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
273 case tt_waypoint_name:
274 if ( ( tmp = get_attr(attr, "id") ) ) {
276 g_free ( c_wp_name );
277 c_wp_name = g_strdup ( tmp );
279 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer for description */
286 static void gpx_end(VikTrwLayer *vtl, const char *el)
288 static GTimeVal tp_time;
289 static GTimeVal wp_time;
291 g_string_truncate ( xpath, xpath->len - strlen(el) - 1 );
293 switch ( current_tag ) {
298 c_wp_name = g_strdup_printf("VIKING_WP%04d", unnamed_waypoints++);
299 vik_trw_layer_filein_add_waypoint ( vtl, c_wp_name, c_wp );
300 g_free ( c_wp_name );
307 c_tr_name = g_strdup_printf("VIKING_TR%03d", unnamed_tracks++);
308 // Delibrate fall through
311 c_tr_name = g_strdup_printf("VIKING_RT%03d", unnamed_routes++);
312 vik_trw_layer_filein_add_track ( vtl, c_tr_name, c_tr );
313 g_free ( c_tr_name );
320 g_free ( c_wp_name );
321 c_wp_name = g_strdup ( c_cdata->str );
322 g_string_erase ( c_cdata, 0, -1 );
327 g_free ( c_tr_name );
328 c_tr_name = g_strdup ( c_cdata->str );
329 g_string_erase ( c_cdata, 0, -1 );
333 c_wp->altitude = g_ascii_strtod ( c_cdata->str, NULL );
334 g_string_erase ( c_cdata, 0, -1 );
337 case tt_trk_trkseg_trkpt_ele:
338 c_tp->altitude = g_ascii_strtod ( c_cdata->str, NULL );
339 g_string_erase ( c_cdata, 0, -1 );
342 case tt_waypoint_name: /* .loc name is really description. */
344 vik_waypoint_set_description ( c_wp, c_cdata->str );
345 g_string_erase ( c_cdata, 0, -1 );
349 vik_waypoint_set_comment ( c_wp, c_cdata->str );
350 g_string_erase ( c_cdata, 0, -1 );
354 vik_waypoint_set_image ( c_wp, c_cdata->str );
355 g_string_erase ( c_cdata, 0, -1 );
359 vik_waypoint_set_symbol ( c_wp, c_cdata->str );
360 g_string_erase ( c_cdata, 0, -1 );
365 vik_track_set_description ( c_tr, c_cdata->str );
366 g_string_erase ( c_cdata, 0, -1 );
370 vik_track_set_comment ( c_tr, c_cdata->str );
371 g_string_erase ( c_cdata, 0, -1 );
375 if ( g_time_val_from_iso8601(c_cdata->str, &wp_time) ) {
376 c_wp->timestamp = wp_time.tv_sec;
377 c_wp->has_timestamp = TRUE;
379 g_string_erase ( c_cdata, 0, -1 );
382 case tt_trk_trkseg_trkpt_time:
383 if ( g_time_val_from_iso8601(c_cdata->str, &tp_time) ) {
384 c_tp->timestamp = tp_time.tv_sec;
385 c_tp->has_timestamp = TRUE;
387 g_string_erase ( c_cdata, 0, -1 );
390 case tt_trk_trkseg_trkpt_course:
391 c_tp->course = g_ascii_strtod ( c_cdata->str, NULL );
392 g_string_erase ( c_cdata, 0, -1 );
395 case tt_trk_trkseg_trkpt_speed:
396 c_tp->speed = g_ascii_strtod ( c_cdata->str, NULL );
397 g_string_erase ( c_cdata, 0, -1 );
400 case tt_trk_trkseg_trkpt_fix:
401 if (!strcmp("2d", c_cdata->str))
402 c_tp->fix_mode = VIK_GPS_MODE_2D;
403 else if (!strcmp("3d", c_cdata->str))
404 c_tp->fix_mode = VIK_GPS_MODE_3D;
405 else /* TODO: more fix modes here */
406 c_tp->fix_mode = VIK_GPS_MODE_NOT_SEEN;
407 g_string_erase ( c_cdata, 0, -1 );
410 case tt_trk_trkseg_trkpt_sat:
411 c_tp->nsats = atoi ( c_cdata->str );
412 g_string_erase ( c_cdata, 0, -1 );
415 case tt_trk_trkseg_trkpt_hdop:
416 c_tp->hdop = g_strtod ( c_cdata->str, NULL );
417 g_string_erase ( c_cdata, 0, -1 );
420 case tt_trk_trkseg_trkpt_vdop:
421 c_tp->vdop = g_strtod ( c_cdata->str, NULL );
422 g_string_erase ( c_cdata, 0, -1 );
425 case tt_trk_trkseg_trkpt_pdop:
426 c_tp->pdop = g_strtod ( c_cdata->str, NULL );
427 g_string_erase ( c_cdata, 0, -1 );
433 current_tag = get_tag ( xpath->str );
436 static void gpx_cdata(void *dta, const XML_Char *s, int len)
438 switch ( current_tag ) {
442 case tt_trk_trkseg_trkpt_ele:
449 case tt_trk_trkseg_trkpt_time:
451 case tt_trk_trkseg_trkpt_course:
452 case tt_trk_trkseg_trkpt_speed:
453 case tt_trk_trkseg_trkpt_fix:
454 case tt_trk_trkseg_trkpt_sat:
455 case tt_trk_trkseg_trkpt_hdop:
456 case tt_trk_trkseg_trkpt_vdop:
457 case tt_trk_trkseg_trkpt_pdop:
458 case tt_waypoint_name: /* .loc name is really description. */
459 g_string_append_len ( c_cdata, s, len );
462 default: break; /* ignore cdata from other things */
466 // make like a "stack" of tag names
467 // like gpspoint's separated like /gpx/wpt/whatever
469 gboolean a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) {
470 XML_Parser parser = XML_ParserCreate(NULL);
472 enum XML_Status status = XML_STATUS_ERROR;
474 XML_SetElementHandler(parser, (XML_StartElementHandler) gpx_start, (XML_EndElementHandler) gpx_end);
475 XML_SetUserData(parser, vtl); /* in the future we could remove all global variables */
476 XML_SetCharacterDataHandler(parser, (XML_CharacterDataHandler) gpx_cdata);
480 g_assert ( f != NULL && vtl != NULL );
482 xpath = g_string_new ( "" );
483 c_cdata = g_string_new ( "" );
485 unnamed_waypoints = 1;
490 len = fread(buf, 1, sizeof(buf)-7, f);
491 done = feof(f) || !len;
492 status = XML_Parse(parser, buf, len, done);
495 XML_ParserFree (parser);
496 g_string_free ( xpath, TRUE );
497 g_string_free ( c_cdata, TRUE );
499 return status != XML_STATUS_ERROR;
502 /**** entitize from GPSBabel ****/
510 entity_types stdentities[] = {
512 { "'", "'", 1 },
515 { "\"", """, 0 },
519 void utf8_to_int( const char *cp, int *bytes, int *value )
521 if ( (*cp & 0xe0) == 0xc0 ) {
522 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
524 *value = ((*cp & 0x1f) << 6) |
527 else if ( (*cp & 0xf0) == 0xe0 ) {
528 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
529 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
531 *value = ((*cp & 0x0f) << 12) |
532 ((*(cp+1) & 0x3f) << 6) |
535 else if ( (*cp & 0xf8) == 0xf0 ) {
536 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
537 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
538 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
540 *value = ((*cp & 0x07) << 18) |
541 ((*(cp+1) & 0x3f) << 12) |
542 ((*(cp+2) & 0x3f) << 6) |
545 else if ( (*cp & 0xfc) == 0xf8 ) {
546 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
547 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
548 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
549 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
551 *value = ((*cp & 0x03) << 24) |
552 ((*(cp+1) & 0x3f) << 18) |
553 ((*(cp+2) & 0x3f) << 12) |
554 ((*(cp+3) & 0x3f) << 6) |
557 else if ( (*cp & 0xfe) == 0xfc ) {
558 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
559 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
560 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
561 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
562 if ( (*(cp+5) & 0xc0) != 0x80 ) goto dodefault;
564 *value = ((*cp & 0x01) << 30) |
565 ((*(cp+1) & 0x3f) << 24) |
566 ((*(cp+2) & 0x3f) << 18) |
567 ((*(cp+3) & 0x3f) << 12) |
568 ((*(cp+4) & 0x3f) << 6) |
574 *value = (unsigned char)*cp;
580 entitize(const char * str)
582 int elen, ecount, nsecount;
585 char * p, * tmp, * xstr;
591 elen = ecount = nsecount = 0;
593 /* figure # of entity replacements and additional size. */
596 while ((cp = strstr(cp, ep->text)) != NULL) {
597 elen += strlen(ep->entity) - strlen(ep->text);
599 cp += strlen(ep->text);
604 /* figure the same for other than standard entities (i.e. anything
605 * that isn't in the range U+0000 to U+007F */
606 for ( cp = str; *cp; cp++ ) {
609 utf8_to_int( cp, &bytes, &value );
611 elen += sprintf( tmpsub, "&#x%x;", value ) - bytes;
616 /* enough space for the whole string plus entity replacements, if any */
617 tmp = g_malloc((strlen(str) + elen + 1));
620 /* no entity replacements */
621 if (ecount == 0 && nsecount == 0)
625 for (ep = stdentities; ep->text; ep++) {
627 while ((p = strstr(p, ep->text)) != NULL) {
628 elen = strlen(ep->entity);
630 xstr = g_strdup(p + strlen(ep->text));
632 strcpy(p, ep->entity);
633 strcpy(p + elen, xstr);
642 if ( nsecount != 0 ) {
646 utf8_to_int( p, &bytes, &value );
648 xstr = g_strdup( p + bytes );
653 sprintf( p, "&#x%x;", value );
667 /**** end GPSBabel code ****/
671 static void gpx_write_waypoint ( VikWaypoint *wp, GpxWritingContext *context )
673 // Don't write invisible waypoints when specified
674 if (context->options && !context->options->hidden && !wp->visible)
677 FILE *f = context->file;
678 static struct LatLon ll;
681 vik_coord_to_latlon ( &(wp->coord), &ll );
682 s_lat = a_coords_dtostr( ll.lat );
683 s_lon = a_coords_dtostr( ll.lon );
684 // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension'
685 // luckily most other GPX processing software ignores things they don't understand
686 fprintf ( f, "<wpt lat=\"%s\" lon=\"%s\"%s>\n",
687 s_lat, s_lon, wp->visible ? "" : " hidden=\"hidden\"" );
693 tmp = entitize ( wp->name );
695 tmp = g_strdup ("waypoint");
697 fprintf ( f, " <name>%s</name>\n", tmp );
700 if ( wp->altitude != VIK_DEFAULT_ALTITUDE )
702 tmp = a_coords_dtostr ( wp->altitude );
703 fprintf ( f, " <ele>%s</ele>\n", tmp );
707 if ( wp->has_timestamp ) {
709 timestamp.tv_sec = wp->timestamp;
710 timestamp.tv_usec = 0;
712 gchar *time_iso8601 = g_time_val_to_iso8601 ( ×tamp );
713 if ( time_iso8601 != NULL )
714 fprintf ( f, " <time>%s</time>\n", time_iso8601 );
715 g_free ( time_iso8601 );
720 tmp = entitize(wp->comment);
721 fprintf ( f, " <cmt>%s</cmt>\n", tmp );
724 if ( wp->description )
726 tmp = entitize(wp->description);
727 fprintf ( f, " <desc>%s</desc>\n", tmp );
732 tmp = entitize(wp->image);
733 fprintf ( f, " <link>%s</link>\n", tmp );
738 tmp = entitize(wp->symbol);
739 if ( a_vik_gpx_export_wpt_sym_name ( ) ) {
740 // Lowercase the symbol name
741 gchar *tmp2 = g_utf8_strdown ( tmp, -1 );
742 fprintf ( f, " <sym>%s</sym>\n", tmp2 );
746 fprintf ( f, " <sym>%s</sym>\n", tmp);
750 fprintf ( f, "</wpt>\n" );
753 static void gpx_write_trackpoint ( VikTrackpoint *tp, GpxWritingContext *context )
755 FILE *f = context->file;
756 static struct LatLon ll;
757 gchar *s_lat,*s_lon, *s_alt, *s_dop;
759 vik_coord_to_latlon ( &(tp->coord), &ll );
761 // No such thing as a rteseg! So make sure we don't put them in
762 if ( context->options && !context->options->is_route && tp->newsegment )
763 fprintf ( f, " </trkseg>\n <trkseg>\n" );
765 s_lat = a_coords_dtostr( ll.lat );
766 s_lon = a_coords_dtostr( ll.lon );
767 fprintf ( f, " <%spt lat=\"%s\" lon=\"%s\">\n", (context->options && context->options->is_route) ? "rte" : "trk", s_lat, s_lon );
768 g_free ( s_lat ); s_lat = NULL;
769 g_free ( s_lon ); s_lon = NULL;
772 if ( tp->altitude != VIK_DEFAULT_ALTITUDE )
774 s_alt = a_coords_dtostr ( tp->altitude );
776 else if ( context->options != NULL && context->options->force_ele )
778 s_alt = a_coords_dtostr ( 0 );
781 fprintf ( f, " <ele>%s</ele>\n", s_alt );
782 g_free ( s_alt ); s_alt = NULL;
785 if ( tp->has_timestamp ) {
787 timestamp.tv_sec = tp->timestamp;
788 timestamp.tv_usec = 0;
790 time_iso8601 = g_time_val_to_iso8601 ( ×tamp );
792 else if ( context->options != NULL && context->options->force_time )
795 g_get_current_time ( ¤t );
797 time_iso8601 = g_time_val_to_iso8601 ( ¤t );
799 if ( time_iso8601 != NULL )
800 fprintf ( f, " <time>%s</time>\n", time_iso8601 );
801 g_free(time_iso8601);
804 if (!isnan(tp->course)) {
805 gchar *s_course = a_coords_dtostr(tp->course);
806 fprintf ( f, " <course>%s</course>\n", s_course );
809 if (!isnan(tp->speed)) {
810 gchar *s_speed = a_coords_dtostr(tp->speed);
811 fprintf ( f, " <speed>%s</speed>\n", s_speed );
814 if (tp->fix_mode == VIK_GPS_MODE_2D)
815 fprintf ( f, " <fix>2d</fix>\n");
816 if (tp->fix_mode == VIK_GPS_MODE_3D)
817 fprintf ( f, " <fix>3d</fix>\n");
819 fprintf ( f, " <sat>%d</sat>\n", tp->nsats );
822 if ( tp->hdop != VIK_DEFAULT_DOP )
824 s_dop = a_coords_dtostr ( tp->hdop );
827 fprintf ( f, " <hdop>%s</hdop>\n", s_dop );
828 g_free ( s_dop ); s_dop = NULL;
830 if ( tp->vdop != VIK_DEFAULT_DOP )
832 s_dop = a_coords_dtostr ( tp->vdop );
835 fprintf ( f, " <vdop>%s</vdop>\n", s_dop );
836 g_free ( s_dop ); s_dop = NULL;
838 if ( tp->pdop != VIK_DEFAULT_DOP )
840 s_dop = a_coords_dtostr ( tp->pdop );
843 fprintf ( f, " <pdop>%s</pdop>\n", s_dop );
844 g_free ( s_dop ); s_dop = NULL;
846 fprintf ( f, " </%spt>\n", (context->options && context->options->is_route) ? "rte" : "trk" );
850 static void gpx_write_track ( VikTrack *t, GpxWritingContext *context )
852 // Don't write invisible tracks when specified
853 if (context->options && !context->options->hidden && !t->visible)
856 FILE *f = context->file;
858 gboolean first_tp_is_newsegment = FALSE; /* must temporarily make it not so, but we want to restore state. not that it matters. */
862 tmp = entitize ( t->name );
864 tmp = g_strdup ("track");
866 // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension'
867 // luckily most other GPX processing software ignores things they don't understand
868 fprintf ( f, "<%s%s>\n <name>%s</name>\n",
869 t->is_route ? "rte" : "trk",
870 t->visible ? "" : " hidden=\"hidden\"",
876 tmp = entitize ( t->comment );
877 fprintf ( f, " <cmt>%s</cmt>\n", tmp );
881 if ( t->description )
883 tmp = entitize ( t->description );
884 fprintf ( f, " <desc>%s</desc>\n", tmp );
888 /* No such thing as a rteseg! */
890 fprintf ( f, " <trkseg>\n" );
892 if ( t->trackpoints && t->trackpoints->data ) {
893 first_tp_is_newsegment = VIK_TRACKPOINT(t->trackpoints->data)->newsegment;
894 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = FALSE; /* so we won't write </trkseg><trkseg> already */
895 g_list_foreach ( t->trackpoints, (GFunc) gpx_write_trackpoint, context );
896 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = first_tp_is_newsegment; /* restore state */
899 /* NB apparently no such thing as a rteseg! */
901 fprintf ( f, " </trkseg>\n");
903 fprintf ( f, "</%s>\n", t->is_route ? "rte" : "trk" );
906 static void gpx_write_header( FILE *f )
908 fprintf(f, "<?xml version=\"1.0\"?>\n"
909 "<gpx version=\"1.0\" creator=\"Viking -- http://viking.sf.net/\"\n"
910 "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
911 "xmlns=\"http://www.topografix.com/GPX/1/0\"\n"
912 "xsi:schemaLocation=\"http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd\">\n");
915 static void gpx_write_footer( FILE *f )
917 fprintf(f, "</gpx>\n");
920 static int gpx_waypoint_compare(const void *x, const void *y)
922 VikWaypoint *a = (VikWaypoint *)x;
923 VikWaypoint *b = (VikWaypoint *)y;
924 return strcmp(a->name,b->name);
927 static int gpx_track_compare_name(const void *x, const void *y)
929 VikTrack *a = (VikTrack *)x;
930 VikTrack *b = (VikTrack *)y;
931 return strcmp(a->name,b->name);
934 /* Function to compare two tracks by their first timestamp */
935 static int gpx_track_compare_timestamp (const void *x, const void *y)
937 VikTrack *a = (VikTrack *)x;
938 VikTrack *b = (VikTrack *)y;
940 VikTrackpoint *tpa = NULL;
941 VikTrackpoint *tpb = NULL;
943 if ( a->trackpoints )
944 tpa = VIK_TRACKPOINT(g_list_first(a->trackpoints)->data);
946 if ( b->trackpoints )
947 tpb = VIK_TRACKPOINT(g_list_first(b->trackpoints)->data);
950 if ( tpa->timestamp < tpb->timestamp )
952 if ( tpa->timestamp > tpb->timestamp )
965 void a_gpx_write_file ( VikTrwLayer *vtl, FILE *f, GpxWritingOptions *options )
967 GpxWritingContext context = { options, f };
969 gpx_write_header ( f );
971 // gather waypoints in a list, then sort
972 // g_hash_table_get_values: glib 2.14+
973 GList *gl = g_hash_table_get_values ( vik_trw_layer_get_waypoints ( vtl ) );
974 gl = g_list_sort ( gl, gpx_waypoint_compare );
977 for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) {
978 gpx_write_waypoint ( (VikWaypoint*)iter->data, &context );
983 //gl = g_hash_table_get_values ( vik_trw_layer_get_tracks ( vtl ) );
984 // Forming the list manually seems to produce one that is more likely to be nearer to the creation order
987 GHashTableIter ght_iter;
988 g_hash_table_iter_init ( &ght_iter, vik_trw_layer_get_tracks ( vtl ) );
989 while ( g_hash_table_iter_next (&ght_iter, &key, &value) ) {
990 gl = g_list_prepend ( gl ,value );
992 gl = g_list_reverse ( gl );
994 // Sort method determined by preference
995 if ( a_vik_get_gpx_export_trk_sort() == VIK_GPX_EXPORT_TRK_SORT_TIME )
996 gl = g_list_sort ( gl, gpx_track_compare_timestamp );
997 else if ( a_vik_get_gpx_export_trk_sort() == VIK_GPX_EXPORT_TRK_SORT_ALPHA )
998 gl = g_list_sort ( gl, gpx_track_compare_name );
1000 // Routes sorted by name
1001 GList *glrte = g_hash_table_get_values ( vik_trw_layer_get_routes ( vtl ) );
1002 glrte = g_list_sort ( glrte, gpx_track_compare_name );
1004 // g_list_concat doesn't copy memory properly
1005 // so process each list separately
1007 GpxWritingContext context_tmp = context;
1008 GpxWritingOptions opt_tmp = { FALSE, FALSE, FALSE };
1009 // Force trackpoints on tracks
1010 if ( !context.options )
1011 context_tmp.options = &opt_tmp;
1012 context_tmp.options->is_route = FALSE;
1014 // Loop around each list and write each one
1015 for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) {
1016 gpx_write_track ( (VikTrack*)iter->data, &context_tmp );
1019 // Routes (to get routepoints)
1020 context_tmp.options->is_route = TRUE;
1021 for (iter = g_list_first (glrte); iter != NULL; iter = g_list_next (iter)) {
1022 gpx_write_track ( (VikTrack*)iter->data, &context_tmp );
1026 g_list_free ( glrte );
1028 gpx_write_footer ( f );
1031 void a_gpx_write_track_file ( VikTrack *trk, FILE *f, GpxWritingOptions *options )
1033 GpxWritingContext context = {options, f};
1034 gpx_write_header ( f );
1035 gpx_write_track ( trk, &context );
1036 gpx_write_footer ( f );