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) 2012-2014, 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 */
65 tt_wpt_link, /* New in GPX 1.1 */
76 tt_trk_trkseg_trkpt_ele,
77 tt_trk_trkseg_trkpt_time,
78 tt_trk_trkseg_trkpt_name,
80 tt_trk_trkseg_trkpt_course,
81 tt_trk_trkseg_trkpt_speed,
82 tt_trk_trkseg_trkpt_fix,
83 tt_trk_trkseg_trkpt_sat,
85 tt_trk_trkseg_trkpt_hdop,
86 tt_trk_trkseg_trkpt_vdop,
87 tt_trk_trkseg_trkpt_pdop,
94 typedef struct tag_mapping {
95 tag_type tag_type; /* enum from above for this tag */
96 const char *tag_name; /* xpath-ish tag name */
100 GpxWritingOptions *options;
105 * xpath(ish) mappings between full tag paths and internal identifiers.
106 * These appear in the order they appear in the GPX specification.
107 * If it's not a tag we explicitly handle, it doesn't go here.
110 tag_mapping tag_path_map[] = {
113 { tt_gpx_name, "/gpx/name" },
114 { tt_gpx_desc, "/gpx/desc" },
115 { tt_gpx_time, "/gpx/time" },
116 { tt_gpx_author, "/gpx/author" },
117 { tt_gpx_keywords, "/gpx/keywords" },
119 // GPX 1.1 variant - basic properties moved into metadata namespace
120 { tt_gpx_name, "/gpx/metadata/name" },
121 { tt_gpx_desc, "/gpx/metadata/desc" },
122 { tt_gpx_time, "/gpx/metadata/time" },
123 { tt_gpx_author, "/gpx/metadata/author" },
124 { tt_gpx_keywords, "/gpx/metadata/keywords" },
126 { tt_wpt, "/gpx/wpt" },
128 { tt_waypoint, "/loc/waypoint" },
129 { tt_waypoint_coord, "/loc/waypoint/coord" },
130 { tt_waypoint_name, "/loc/waypoint/name" },
132 { tt_wpt_ele, "/gpx/wpt/ele" },
133 { tt_wpt_time, "/gpx/wpt/time" },
134 { tt_wpt_name, "/gpx/wpt/name" },
135 { tt_wpt_cmt, "/gpx/wpt/cmt" },
136 { tt_wpt_desc, "/gpx/wpt/desc" },
137 { tt_wpt_sym, "/gpx/wpt/sym" },
138 { tt_wpt_sym, "/loc/waypoint/type" },
139 { tt_wpt_url, "/gpx/wpt/url" },
140 { tt_wpt_link, "/gpx/wpt/link" }, /* GPX 1.1 */
142 { tt_trk, "/gpx/trk" },
143 { tt_trk_name, "/gpx/trk/name" },
144 { tt_trk_cmt, "/gpx/trk/cmt" },
145 { tt_trk_desc, "/gpx/trk/desc" },
146 { tt_trk_trkseg, "/gpx/trk/trkseg" },
147 { tt_trk_trkseg_trkpt, "/gpx/trk/trkseg/trkpt" },
148 { tt_trk_trkseg_trkpt_ele, "/gpx/trk/trkseg/trkpt/ele" },
149 { tt_trk_trkseg_trkpt_time, "/gpx/trk/trkseg/trkpt/time" },
150 { tt_trk_trkseg_trkpt_name, "/gpx/trk/trkseg/trkpt/name" },
152 { tt_trk_trkseg_trkpt_course, "/gpx/trk/trkseg/trkpt/course" },
153 { tt_trk_trkseg_trkpt_speed, "/gpx/trk/trkseg/trkpt/speed" },
154 { tt_trk_trkseg_trkpt_fix, "/gpx/trk/trkseg/trkpt/fix" },
155 { tt_trk_trkseg_trkpt_sat, "/gpx/trk/trkseg/trkpt/sat" },
157 { tt_trk_trkseg_trkpt_hdop, "/gpx/trk/trkseg/trkpt/hdop" },
158 { tt_trk_trkseg_trkpt_vdop, "/gpx/trk/trkseg/trkpt/vdop" },
159 { tt_trk_trkseg_trkpt_pdop, "/gpx/trk/trkseg/trkpt/pdop" },
161 { tt_rte, "/gpx/rte" },
162 // NB Route reuses track point feature tags
163 { tt_trk_name, "/gpx/rte/name" },
164 { tt_trk_cmt, "/gpx/rte/cmt" },
165 { tt_trk_desc, "/gpx/rte/desc" },
166 { tt_trk_trkseg_trkpt, "/gpx/rte/rtept" },
167 { tt_trk_trkseg_trkpt_name, "/gpx/rte/rtept/name" },
168 { tt_trk_trkseg_trkpt_ele, "/gpx/rte/rtept/ele" },
173 static tag_type get_tag(const char *t)
176 for (tm = tag_path_map; tm->tag_type != 0; tm++)
177 if (0 == strcmp(tm->tag_name, t))
182 /******************************************/
184 tag_type current_tag = tt_unknown;
185 GString *xpath = NULL;
186 GString *c_cdata = NULL;
188 /* current ("c_") objects */
189 VikTrackpoint *c_tp = NULL;
190 VikWaypoint *c_wp = NULL;
191 VikTrack *c_tr = NULL;
192 VikTRWMetadata *c_md = NULL;
194 gchar *c_wp_name = NULL;
195 gchar *c_tr_name = NULL;
197 /* temporary things so we don't have to create them lots of times */
198 const gchar *c_slat, *c_slon;
201 /* specialty flags / etc */
202 gboolean f_tr_newseg;
203 guint unnamed_waypoints = 0;
204 guint unnamed_tracks = 0;
205 guint unnamed_routes = 0;
207 static const char *get_attr ( const char **attr, const char *key )
210 if ( strcmp(*attr,key) == 0 )
217 static gboolean set_c_ll ( const char **attr )
219 if ( (c_slat = get_attr ( attr, "lat" )) && (c_slon = get_attr ( attr, "lon" )) ) {
220 c_ll.lat = g_ascii_strtod(c_slat, NULL);
221 c_ll.lon = g_ascii_strtod(c_slon, NULL);
227 static void gpx_start(VikTrwLayer *vtl, const char *el, const char **attr)
229 static const gchar *tmp;
231 g_string_append_c ( xpath, '/' );
232 g_string_append ( xpath, el );
233 current_tag = get_tag ( xpath->str );
235 switch ( current_tag ) {
238 c_md = vik_trw_metadata_new();
242 if ( set_c_ll( attr ) ) {
243 c_wp = vik_waypoint_new ();
244 c_wp->visible = TRUE;
245 if ( get_attr ( attr, "hidden" ) )
246 c_wp->visible = FALSE;
248 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
254 c_tr = vik_track_new ();
255 vik_track_set_defaults ( c_tr );
256 c_tr->is_route = (current_tag == tt_rte) ? TRUE : FALSE;
257 c_tr->visible = TRUE;
258 if ( get_attr ( attr, "hidden" ) )
259 c_tr->visible = FALSE;
266 case tt_trk_trkseg_trkpt:
267 if ( set_c_ll( attr ) ) {
268 c_tp = vik_trackpoint_new ();
269 vik_coord_load_from_latlon ( &(c_tp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
271 c_tp->newsegment = TRUE;
274 c_tr->trackpoints = g_list_append ( c_tr->trackpoints, c_tp );
281 case tt_gpx_keywords:
283 case tt_trk_trkseg_trkpt_name:
284 case tt_trk_trkseg_trkpt_ele:
285 case tt_trk_trkseg_trkpt_time:
296 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer */
300 c_wp = vik_waypoint_new ();
301 c_wp->visible = TRUE;
304 case tt_waypoint_coord:
305 if ( set_c_ll( attr ) )
306 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
309 case tt_waypoint_name:
310 if ( ( tmp = get_attr(attr, "id") ) ) {
312 g_free ( c_wp_name );
313 c_wp_name = g_strdup ( tmp );
315 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer for description */
322 static void gpx_end(VikTrwLayer *vtl, const char *el)
324 static GTimeVal tp_time;
325 static GTimeVal wp_time;
327 g_string_truncate ( xpath, xpath->len - strlen(el) - 1 );
329 switch ( current_tag ) {
332 vik_trw_layer_set_metadata ( vtl, c_md );
337 vik_layer_rename ( VIK_LAYER(vtl), c_cdata->str );
338 g_string_erase ( c_cdata, 0, -1 );
343 g_free ( c_md->description );
344 c_md->author = g_strdup ( c_cdata->str );
345 g_string_erase ( c_cdata, 0, -1 );
349 if ( c_md->description )
350 g_free ( c_md->description );
351 c_md->description = g_strdup ( c_cdata->str );
352 g_string_erase ( c_cdata, 0, -1 );
355 case tt_gpx_keywords:
356 if ( c_md->keywords )
357 g_free ( c_md->keywords );
358 c_md->keywords = g_strdup ( c_cdata->str );
359 g_string_erase ( c_cdata, 0, -1 );
363 if ( c_md->timestamp )
364 g_free ( c_md->timestamp );
365 c_md->timestamp = g_strdup ( c_cdata->str );
366 g_string_erase ( c_cdata, 0, -1 );
372 c_wp_name = g_strdup_printf("VIKING_WP%04d", unnamed_waypoints++);
373 vik_trw_layer_filein_add_waypoint ( vtl, c_wp_name, c_wp );
374 g_free ( c_wp_name );
381 c_tr_name = g_strdup_printf("VIKING_TR%03d", unnamed_tracks++);
382 // Delibrate fall through
385 c_tr_name = g_strdup_printf("VIKING_RT%03d", unnamed_routes++);
386 vik_trw_layer_filein_add_track ( vtl, c_tr_name, c_tr );
387 g_free ( c_tr_name );
394 g_free ( c_wp_name );
395 c_wp_name = g_strdup ( c_cdata->str );
396 g_string_erase ( c_cdata, 0, -1 );
401 g_free ( c_tr_name );
402 c_tr_name = g_strdup ( c_cdata->str );
403 g_string_erase ( c_cdata, 0, -1 );
407 c_wp->altitude = g_ascii_strtod ( c_cdata->str, NULL );
408 g_string_erase ( c_cdata, 0, -1 );
411 case tt_trk_trkseg_trkpt_ele:
412 c_tp->altitude = g_ascii_strtod ( c_cdata->str, NULL );
413 g_string_erase ( c_cdata, 0, -1 );
416 case tt_waypoint_name: /* .loc name is really description. */
418 vik_waypoint_set_description ( c_wp, c_cdata->str );
419 g_string_erase ( c_cdata, 0, -1 );
423 vik_waypoint_set_comment ( c_wp, c_cdata->str );
424 g_string_erase ( c_cdata, 0, -1 );
428 vik_waypoint_set_url ( c_wp, c_cdata->str );
429 g_string_erase ( c_cdata, 0, -1 );
433 vik_waypoint_set_image ( c_wp, c_cdata->str );
434 g_string_erase ( c_cdata, 0, -1 );
438 vik_waypoint_set_symbol ( c_wp, c_cdata->str );
439 g_string_erase ( c_cdata, 0, -1 );
444 vik_track_set_description ( c_tr, c_cdata->str );
445 g_string_erase ( c_cdata, 0, -1 );
449 vik_track_set_comment ( c_tr, c_cdata->str );
450 g_string_erase ( c_cdata, 0, -1 );
454 if ( g_time_val_from_iso8601(c_cdata->str, &wp_time) ) {
455 c_wp->timestamp = wp_time.tv_sec;
456 c_wp->has_timestamp = TRUE;
458 g_string_erase ( c_cdata, 0, -1 );
461 case tt_trk_trkseg_trkpt_name:
462 vik_trackpoint_set_name ( c_tp, c_cdata->str );
463 g_string_erase ( c_cdata, 0, -1 );
466 case tt_trk_trkseg_trkpt_time:
467 if ( g_time_val_from_iso8601(c_cdata->str, &tp_time) ) {
468 c_tp->timestamp = tp_time.tv_sec;
469 c_tp->has_timestamp = TRUE;
471 g_string_erase ( c_cdata, 0, -1 );
474 case tt_trk_trkseg_trkpt_course:
475 c_tp->course = g_ascii_strtod ( c_cdata->str, NULL );
476 g_string_erase ( c_cdata, 0, -1 );
479 case tt_trk_trkseg_trkpt_speed:
480 c_tp->speed = g_ascii_strtod ( c_cdata->str, NULL );
481 g_string_erase ( c_cdata, 0, -1 );
484 case tt_trk_trkseg_trkpt_fix:
485 if (!strcmp("2d", c_cdata->str))
486 c_tp->fix_mode = VIK_GPS_MODE_2D;
487 else if (!strcmp("3d", c_cdata->str))
488 c_tp->fix_mode = VIK_GPS_MODE_3D;
489 else /* TODO: more fix modes here */
490 c_tp->fix_mode = VIK_GPS_MODE_NOT_SEEN;
491 g_string_erase ( c_cdata, 0, -1 );
494 case tt_trk_trkseg_trkpt_sat:
495 c_tp->nsats = atoi ( c_cdata->str );
496 g_string_erase ( c_cdata, 0, -1 );
499 case tt_trk_trkseg_trkpt_hdop:
500 c_tp->hdop = g_strtod ( c_cdata->str, NULL );
501 g_string_erase ( c_cdata, 0, -1 );
504 case tt_trk_trkseg_trkpt_vdop:
505 c_tp->vdop = g_strtod ( c_cdata->str, NULL );
506 g_string_erase ( c_cdata, 0, -1 );
509 case tt_trk_trkseg_trkpt_pdop:
510 c_tp->pdop = g_strtod ( c_cdata->str, NULL );
511 g_string_erase ( c_cdata, 0, -1 );
517 current_tag = get_tag ( xpath->str );
520 static void gpx_cdata(void *dta, const XML_Char *s, int len)
522 switch ( current_tag ) {
526 case tt_gpx_keywords:
531 case tt_trk_trkseg_trkpt_ele:
539 case tt_trk_trkseg_trkpt_time:
541 case tt_trk_trkseg_trkpt_name:
542 case tt_trk_trkseg_trkpt_course:
543 case tt_trk_trkseg_trkpt_speed:
544 case tt_trk_trkseg_trkpt_fix:
545 case tt_trk_trkseg_trkpt_sat:
546 case tt_trk_trkseg_trkpt_hdop:
547 case tt_trk_trkseg_trkpt_vdop:
548 case tt_trk_trkseg_trkpt_pdop:
549 case tt_waypoint_name: /* .loc name is really description. */
550 g_string_append_len ( c_cdata, s, len );
553 default: break; /* ignore cdata from other things */
557 // make like a "stack" of tag names
558 // like gpspoint's separated like /gpx/wpt/whatever
560 gboolean a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) {
561 XML_Parser parser = XML_ParserCreate(NULL);
563 enum XML_Status status = XML_STATUS_ERROR;
565 XML_SetElementHandler(parser, (XML_StartElementHandler) gpx_start, (XML_EndElementHandler) gpx_end);
566 XML_SetUserData(parser, vtl); /* in the future we could remove all global variables */
567 XML_SetCharacterDataHandler(parser, (XML_CharacterDataHandler) gpx_cdata);
571 g_assert ( f != NULL && vtl != NULL );
573 xpath = g_string_new ( "" );
574 c_cdata = g_string_new ( "" );
576 unnamed_waypoints = 1;
581 len = fread(buf, 1, sizeof(buf)-7, f);
582 done = feof(f) || !len;
583 status = XML_Parse(parser, buf, len, done);
586 XML_ParserFree (parser);
587 g_string_free ( xpath, TRUE );
588 g_string_free ( c_cdata, TRUE );
590 return status != XML_STATUS_ERROR;
593 /**** entitize from GPSBabel ****/
601 entity_types stdentities[] = {
603 { "'", "'", 1 },
606 { "\"", """, 0 },
610 void utf8_to_int( const char *cp, int *bytes, int *value )
612 if ( (*cp & 0xe0) == 0xc0 ) {
613 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
615 *value = ((*cp & 0x1f) << 6) |
618 else if ( (*cp & 0xf0) == 0xe0 ) {
619 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
620 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
622 *value = ((*cp & 0x0f) << 12) |
623 ((*(cp+1) & 0x3f) << 6) |
626 else if ( (*cp & 0xf8) == 0xf0 ) {
627 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
628 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
629 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
631 *value = ((*cp & 0x07) << 18) |
632 ((*(cp+1) & 0x3f) << 12) |
633 ((*(cp+2) & 0x3f) << 6) |
636 else if ( (*cp & 0xfc) == 0xf8 ) {
637 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
638 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
639 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
640 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
642 *value = ((*cp & 0x03) << 24) |
643 ((*(cp+1) & 0x3f) << 18) |
644 ((*(cp+2) & 0x3f) << 12) |
645 ((*(cp+3) & 0x3f) << 6) |
648 else if ( (*cp & 0xfe) == 0xfc ) {
649 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
650 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
651 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
652 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
653 if ( (*(cp+5) & 0xc0) != 0x80 ) goto dodefault;
655 *value = ((*cp & 0x01) << 30) |
656 ((*(cp+1) & 0x3f) << 24) |
657 ((*(cp+2) & 0x3f) << 18) |
658 ((*(cp+3) & 0x3f) << 12) |
659 ((*(cp+4) & 0x3f) << 6) |
665 *value = (unsigned char)*cp;
671 entitize(const char * str)
673 int elen, ecount, nsecount;
676 char * p, * tmp, * xstr;
682 elen = ecount = nsecount = 0;
684 /* figure # of entity replacements and additional size. */
687 while ((cp = strstr(cp, ep->text)) != NULL) {
688 elen += strlen(ep->entity) - strlen(ep->text);
690 cp += strlen(ep->text);
695 /* figure the same for other than standard entities (i.e. anything
696 * that isn't in the range U+0000 to U+007F */
697 for ( cp = str; *cp; cp++ ) {
700 utf8_to_int( cp, &bytes, &value );
702 elen += sprintf( tmpsub, "&#x%x;", value ) - bytes;
707 /* enough space for the whole string plus entity replacements, if any */
708 tmp = g_malloc((strlen(str) + elen + 1));
711 /* no entity replacements */
712 if (ecount == 0 && nsecount == 0)
716 for (ep = stdentities; ep->text; ep++) {
718 while ((p = strstr(p, ep->text)) != NULL) {
719 elen = strlen(ep->entity);
721 xstr = g_strdup(p + strlen(ep->text));
723 strcpy(p, ep->entity);
724 strcpy(p + elen, xstr);
733 if ( nsecount != 0 ) {
737 utf8_to_int( p, &bytes, &value );
739 xstr = g_strdup( p + bytes );
744 sprintf( p, "&#x%x;", value );
758 /**** end GPSBabel code ****/
762 static void gpx_write_waypoint ( VikWaypoint *wp, GpxWritingContext *context )
764 // Don't write invisible waypoints when specified
765 if (context->options && !context->options->hidden && !wp->visible)
768 FILE *f = context->file;
769 static struct LatLon ll;
772 vik_coord_to_latlon ( &(wp->coord), &ll );
773 s_lat = a_coords_dtostr( ll.lat );
774 s_lon = a_coords_dtostr( ll.lon );
775 // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension'
776 // luckily most other GPX processing software ignores things they don't understand
777 fprintf ( f, "<wpt lat=\"%s\" lon=\"%s\"%s>\n",
778 s_lat, s_lon, wp->visible ? "" : " hidden=\"hidden\"" );
784 tmp = entitize ( wp->name );
786 tmp = g_strdup ("waypoint");
788 fprintf ( f, " <name>%s</name>\n", tmp );
791 if ( wp->altitude != VIK_DEFAULT_ALTITUDE )
793 tmp = a_coords_dtostr ( wp->altitude );
794 fprintf ( f, " <ele>%s</ele>\n", tmp );
798 if ( wp->has_timestamp ) {
800 timestamp.tv_sec = wp->timestamp;
801 timestamp.tv_usec = 0;
803 gchar *time_iso8601 = g_time_val_to_iso8601 ( ×tamp );
804 if ( time_iso8601 != NULL )
805 fprintf ( f, " <time>%s</time>\n", time_iso8601 );
806 g_free ( time_iso8601 );
811 tmp = entitize(wp->comment);
812 fprintf ( f, " <cmt>%s</cmt>\n", tmp );
815 if ( wp->description )
817 tmp = entitize(wp->description);
818 fprintf ( f, " <desc>%s</desc>\n", tmp );
823 tmp = entitize(wp->url);
824 fprintf ( f, " <url>%s</url>\n", tmp );
829 tmp = entitize(wp->image);
830 fprintf ( f, " <link>%s</link>\n", tmp );
835 tmp = entitize(wp->symbol);
836 if ( a_vik_gpx_export_wpt_sym_name ( ) ) {
837 // Lowercase the symbol name
838 gchar *tmp2 = g_utf8_strdown ( tmp, -1 );
839 fprintf ( f, " <sym>%s</sym>\n", tmp2 );
843 fprintf ( f, " <sym>%s</sym>\n", tmp);
847 fprintf ( f, "</wpt>\n" );
850 static void gpx_write_trackpoint ( VikTrackpoint *tp, GpxWritingContext *context )
852 FILE *f = context->file;
853 static struct LatLon ll;
854 gchar *s_lat,*s_lon, *s_alt, *s_dop;
856 vik_coord_to_latlon ( &(tp->coord), &ll );
858 // No such thing as a rteseg! So make sure we don't put them in
859 if ( context->options && !context->options->is_route && tp->newsegment )
860 fprintf ( f, " </trkseg>\n <trkseg>\n" );
862 s_lat = a_coords_dtostr( ll.lat );
863 s_lon = a_coords_dtostr( ll.lon );
864 fprintf ( f, " <%spt lat=\"%s\" lon=\"%s\">\n", (context->options && context->options->is_route) ? "rte" : "trk", s_lat, s_lon );
865 g_free ( s_lat ); s_lat = NULL;
866 g_free ( s_lon ); s_lon = NULL;
869 gchar *s_name = entitize(tp->name);
870 fprintf ( f, " <name>%s</name>\n", s_name );
875 if ( tp->altitude != VIK_DEFAULT_ALTITUDE )
877 s_alt = a_coords_dtostr ( tp->altitude );
879 else if ( context->options != NULL && context->options->force_ele )
881 s_alt = a_coords_dtostr ( 0 );
884 fprintf ( f, " <ele>%s</ele>\n", s_alt );
885 g_free ( s_alt ); s_alt = NULL;
888 if ( tp->has_timestamp ) {
890 timestamp.tv_sec = tp->timestamp;
891 timestamp.tv_usec = 0;
893 time_iso8601 = g_time_val_to_iso8601 ( ×tamp );
895 else if ( context->options != NULL && context->options->force_time )
898 g_get_current_time ( ¤t );
900 time_iso8601 = g_time_val_to_iso8601 ( ¤t );
902 if ( time_iso8601 != NULL )
903 fprintf ( f, " <time>%s</time>\n", time_iso8601 );
904 g_free(time_iso8601);
907 if (!isnan(tp->course)) {
908 gchar *s_course = a_coords_dtostr(tp->course);
909 fprintf ( f, " <course>%s</course>\n", s_course );
912 if (!isnan(tp->speed)) {
913 gchar *s_speed = a_coords_dtostr(tp->speed);
914 fprintf ( f, " <speed>%s</speed>\n", s_speed );
917 if (tp->fix_mode == VIK_GPS_MODE_2D)
918 fprintf ( f, " <fix>2d</fix>\n");
919 if (tp->fix_mode == VIK_GPS_MODE_3D)
920 fprintf ( f, " <fix>3d</fix>\n");
922 fprintf ( f, " <sat>%d</sat>\n", tp->nsats );
925 if ( tp->hdop != VIK_DEFAULT_DOP )
927 s_dop = a_coords_dtostr ( tp->hdop );
930 fprintf ( f, " <hdop>%s</hdop>\n", s_dop );
931 g_free ( s_dop ); s_dop = NULL;
933 if ( tp->vdop != VIK_DEFAULT_DOP )
935 s_dop = a_coords_dtostr ( tp->vdop );
938 fprintf ( f, " <vdop>%s</vdop>\n", s_dop );
939 g_free ( s_dop ); s_dop = NULL;
941 if ( tp->pdop != VIK_DEFAULT_DOP )
943 s_dop = a_coords_dtostr ( tp->pdop );
946 fprintf ( f, " <pdop>%s</pdop>\n", s_dop );
947 g_free ( s_dop ); s_dop = NULL;
949 fprintf ( f, " </%spt>\n", (context->options && context->options->is_route) ? "rte" : "trk" );
953 static void gpx_write_track ( VikTrack *t, GpxWritingContext *context )
955 // Don't write invisible tracks when specified
956 if (context->options && !context->options->hidden && !t->visible)
959 FILE *f = context->file;
961 gboolean first_tp_is_newsegment = FALSE; /* must temporarily make it not so, but we want to restore state. not that it matters. */
965 tmp = entitize ( t->name );
967 tmp = g_strdup ("track");
969 // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension'
970 // luckily most other GPX processing software ignores things they don't understand
971 fprintf ( f, "<%s%s>\n <name>%s</name>\n",
972 t->is_route ? "rte" : "trk",
973 t->visible ? "" : " hidden=\"hidden\"",
979 tmp = entitize ( t->comment );
980 fprintf ( f, " <cmt>%s</cmt>\n", tmp );
984 if ( t->description )
986 tmp = entitize ( t->description );
987 fprintf ( f, " <desc>%s</desc>\n", tmp );
991 /* No such thing as a rteseg! */
993 fprintf ( f, " <trkseg>\n" );
995 if ( t->trackpoints && t->trackpoints->data ) {
996 first_tp_is_newsegment = VIK_TRACKPOINT(t->trackpoints->data)->newsegment;
997 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = FALSE; /* so we won't write </trkseg><trkseg> already */
998 g_list_foreach ( t->trackpoints, (GFunc) gpx_write_trackpoint, context );
999 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = first_tp_is_newsegment; /* restore state */
1002 /* NB apparently no such thing as a rteseg! */
1004 fprintf ( f, " </trkseg>\n");
1006 fprintf ( f, "</%s>\n", t->is_route ? "rte" : "trk" );
1009 static void gpx_write_header( FILE *f )
1011 fprintf(f, "<?xml version=\"1.0\"?>\n"
1012 "<gpx version=\"1.0\" creator=\"Viking -- http://viking.sf.net/\"\n"
1013 "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
1014 "xmlns=\"http://www.topografix.com/GPX/1/0\"\n"
1015 "xsi:schemaLocation=\"http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd\">\n");
1018 static void gpx_write_footer( FILE *f )
1020 fprintf(f, "</gpx>\n");
1023 static int gpx_waypoint_compare(const void *x, const void *y)
1025 VikWaypoint *a = (VikWaypoint *)x;
1026 VikWaypoint *b = (VikWaypoint *)y;
1027 return strcmp(a->name,b->name);
1030 static int gpx_track_compare_name(const void *x, const void *y)
1032 VikTrack *a = (VikTrack *)x;
1033 VikTrack *b = (VikTrack *)y;
1034 return strcmp(a->name,b->name);
1037 void a_gpx_write_file ( VikTrwLayer *vtl, FILE *f, GpxWritingOptions *options )
1039 GpxWritingContext context = { options, f };
1041 gpx_write_header ( f );
1044 const gchar *name = vik_layer_get_name(VIK_LAYER(vtl));
1046 tmp = entitize ( name );
1047 fprintf ( f, " <name>%s</name>\n", tmp );
1051 VikTRWMetadata *md = vik_trw_layer_get_metadata (vtl);
1054 tmp = entitize ( md->author );
1055 fprintf ( f, " <author>%s</author>\n", tmp );
1058 if ( md->description ) {
1059 tmp = entitize ( md->description );
1060 fprintf ( f, " <desc>%s</desc>\n", tmp );
1063 if ( md->timestamp ) {
1064 tmp = entitize ( md->timestamp );
1065 fprintf ( f, " <time>%s</time>\n", tmp );
1068 if ( md->keywords ) {
1069 tmp = entitize ( md->keywords );
1070 fprintf ( f, " <keywords>%s</keywords>\n", tmp );
1075 // gather waypoints in a list, then sort
1076 // g_hash_table_get_values: glib 2.14+
1077 GList *gl = g_hash_table_get_values ( vik_trw_layer_get_waypoints ( vtl ) );
1078 gl = g_list_sort ( gl, gpx_waypoint_compare );
1081 for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) {
1082 gpx_write_waypoint ( (VikWaypoint*)iter->data, &context );
1087 //gl = g_hash_table_get_values ( vik_trw_layer_get_tracks ( vtl ) );
1088 // Forming the list manually seems to produce one that is more likely to be nearer to the creation order
1090 gpointer key, value;
1091 GHashTableIter ght_iter;
1092 g_hash_table_iter_init ( &ght_iter, vik_trw_layer_get_tracks ( vtl ) );
1093 while ( g_hash_table_iter_next (&ght_iter, &key, &value) ) {
1094 gl = g_list_prepend ( gl ,value );
1096 gl = g_list_reverse ( gl );
1098 // Sort method determined by preference
1099 if ( a_vik_get_gpx_export_trk_sort() == VIK_GPX_EXPORT_TRK_SORT_TIME )
1100 gl = g_list_sort ( gl, vik_track_compare_timestamp );
1101 else if ( a_vik_get_gpx_export_trk_sort() == VIK_GPX_EXPORT_TRK_SORT_ALPHA )
1102 gl = g_list_sort ( gl, gpx_track_compare_name );
1104 // Routes sorted by name
1105 GList *glrte = g_hash_table_get_values ( vik_trw_layer_get_routes ( vtl ) );
1106 glrte = g_list_sort ( glrte, gpx_track_compare_name );
1108 // g_list_concat doesn't copy memory properly
1109 // so process each list separately
1111 GpxWritingContext context_tmp = context;
1112 GpxWritingOptions opt_tmp = { FALSE, FALSE, FALSE, FALSE };
1113 // Force trackpoints on tracks
1114 if ( !context.options )
1115 context_tmp.options = &opt_tmp;
1116 context_tmp.options->is_route = FALSE;
1118 // Loop around each list and write each one
1119 for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) {
1120 gpx_write_track ( (VikTrack*)iter->data, &context_tmp );
1123 // Routes (to get routepoints)
1124 context_tmp.options->is_route = TRUE;
1125 for (iter = g_list_first (glrte); iter != NULL; iter = g_list_next (iter)) {
1126 gpx_write_track ( (VikTrack*)iter->data, &context_tmp );
1130 g_list_free ( glrte );
1132 gpx_write_footer ( f );
1135 void a_gpx_write_track_file ( VikTrack *trk, FILE *f, GpxWritingOptions *options )
1137 GpxWritingContext context = {options, f};
1138 gpx_write_header ( f );
1139 gpx_write_track ( trk, &context );
1140 gpx_write_footer ( f );