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 */
42 #include <glib/gstdio.h>
43 #include <glib/gi18n.h>
67 tt_wpt_link, /* New in GPX 1.1 */
78 tt_trk_trkseg_trkpt_ele,
79 tt_trk_trkseg_trkpt_time,
80 tt_trk_trkseg_trkpt_name,
82 tt_trk_trkseg_trkpt_course,
83 tt_trk_trkseg_trkpt_speed,
84 tt_trk_trkseg_trkpt_fix,
85 tt_trk_trkseg_trkpt_sat,
87 tt_trk_trkseg_trkpt_hdop,
88 tt_trk_trkseg_trkpt_vdop,
89 tt_trk_trkseg_trkpt_pdop,
96 typedef struct tag_mapping {
97 tag_type tag_type; /* enum from above for this tag */
98 const char *tag_name; /* xpath-ish tag name */
102 GpxWritingOptions *options;
107 * xpath(ish) mappings between full tag paths and internal identifiers.
108 * These appear in the order they appear in the GPX specification.
109 * If it's not a tag we explicitly handle, it doesn't go here.
112 tag_mapping tag_path_map[] = {
115 { tt_gpx_name, "/gpx/name" },
116 { tt_gpx_desc, "/gpx/desc" },
117 { tt_gpx_time, "/gpx/time" },
118 { tt_gpx_author, "/gpx/author" },
119 { tt_gpx_keywords, "/gpx/keywords" },
121 // GPX 1.1 variant - basic properties moved into metadata namespace
122 { tt_gpx_name, "/gpx/metadata/name" },
123 { tt_gpx_desc, "/gpx/metadata/desc" },
124 { tt_gpx_time, "/gpx/metadata/time" },
125 { tt_gpx_author, "/gpx/metadata/author" },
126 { tt_gpx_keywords, "/gpx/metadata/keywords" },
128 { tt_wpt, "/gpx/wpt" },
130 { tt_waypoint, "/loc/waypoint" },
131 { tt_waypoint_coord, "/loc/waypoint/coord" },
132 { tt_waypoint_name, "/loc/waypoint/name" },
134 { tt_wpt_ele, "/gpx/wpt/ele" },
135 { tt_wpt_time, "/gpx/wpt/time" },
136 { tt_wpt_name, "/gpx/wpt/name" },
137 { tt_wpt_cmt, "/gpx/wpt/cmt" },
138 { tt_wpt_desc, "/gpx/wpt/desc" },
139 { tt_wpt_sym, "/gpx/wpt/sym" },
140 { tt_wpt_sym, "/loc/waypoint/type" },
141 { tt_wpt_url, "/gpx/wpt/url" },
142 { tt_wpt_link, "/gpx/wpt/link" }, /* GPX 1.1 */
144 { tt_trk, "/gpx/trk" },
145 { tt_trk_name, "/gpx/trk/name" },
146 { tt_trk_cmt, "/gpx/trk/cmt" },
147 { tt_trk_desc, "/gpx/trk/desc" },
148 { tt_trk_trkseg, "/gpx/trk/trkseg" },
149 { tt_trk_trkseg_trkpt, "/gpx/trk/trkseg/trkpt" },
150 { tt_trk_trkseg_trkpt_ele, "/gpx/trk/trkseg/trkpt/ele" },
151 { tt_trk_trkseg_trkpt_time, "/gpx/trk/trkseg/trkpt/time" },
152 { tt_trk_trkseg_trkpt_name, "/gpx/trk/trkseg/trkpt/name" },
154 { tt_trk_trkseg_trkpt_course, "/gpx/trk/trkseg/trkpt/course" },
155 { tt_trk_trkseg_trkpt_speed, "/gpx/trk/trkseg/trkpt/speed" },
156 { tt_trk_trkseg_trkpt_fix, "/gpx/trk/trkseg/trkpt/fix" },
157 { tt_trk_trkseg_trkpt_sat, "/gpx/trk/trkseg/trkpt/sat" },
159 { tt_trk_trkseg_trkpt_hdop, "/gpx/trk/trkseg/trkpt/hdop" },
160 { tt_trk_trkseg_trkpt_vdop, "/gpx/trk/trkseg/trkpt/vdop" },
161 { tt_trk_trkseg_trkpt_pdop, "/gpx/trk/trkseg/trkpt/pdop" },
163 { tt_rte, "/gpx/rte" },
164 // NB Route reuses track point feature tags
165 { tt_trk_name, "/gpx/rte/name" },
166 { tt_trk_cmt, "/gpx/rte/cmt" },
167 { tt_trk_desc, "/gpx/rte/desc" },
168 { tt_trk_trkseg_trkpt, "/gpx/rte/rtept" },
169 { tt_trk_trkseg_trkpt_name, "/gpx/rte/rtept/name" },
170 { tt_trk_trkseg_trkpt_ele, "/gpx/rte/rtept/ele" },
175 static tag_type get_tag(const char *t)
178 for (tm = tag_path_map; tm->tag_type != 0; tm++)
179 if (0 == strcmp(tm->tag_name, t))
184 /******************************************/
186 tag_type current_tag = tt_unknown;
187 GString *xpath = NULL;
188 GString *c_cdata = NULL;
190 /* current ("c_") objects */
191 VikTrackpoint *c_tp = NULL;
192 VikWaypoint *c_wp = NULL;
193 VikTrack *c_tr = NULL;
194 VikTRWMetadata *c_md = NULL;
196 gchar *c_wp_name = NULL;
197 gchar *c_tr_name = NULL;
199 /* temporary things so we don't have to create them lots of times */
200 const gchar *c_slat, *c_slon;
203 /* specialty flags / etc */
204 gboolean f_tr_newseg;
205 guint unnamed_waypoints = 0;
206 guint unnamed_tracks = 0;
207 guint unnamed_routes = 0;
209 static const char *get_attr ( const char **attr, const char *key )
212 if ( strcmp(*attr,key) == 0 )
219 static gboolean set_c_ll ( const char **attr )
221 if ( (c_slat = get_attr ( attr, "lat" )) && (c_slon = get_attr ( attr, "lon" )) ) {
222 c_ll.lat = g_ascii_strtod(c_slat, NULL);
223 c_ll.lon = g_ascii_strtod(c_slon, NULL);
229 static void gpx_start(VikTrwLayer *vtl, const char *el, const char **attr)
231 static const gchar *tmp;
233 g_string_append_c ( xpath, '/' );
234 g_string_append ( xpath, el );
235 current_tag = get_tag ( xpath->str );
237 switch ( current_tag ) {
240 c_md = vik_trw_metadata_new();
244 if ( set_c_ll( attr ) ) {
245 c_wp = vik_waypoint_new ();
246 c_wp->visible = TRUE;
247 if ( get_attr ( attr, "hidden" ) )
248 c_wp->visible = FALSE;
250 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
256 c_tr = vik_track_new ();
257 vik_track_set_defaults ( c_tr );
258 c_tr->is_route = (current_tag == tt_rte) ? TRUE : FALSE;
259 c_tr->visible = TRUE;
260 if ( get_attr ( attr, "hidden" ) )
261 c_tr->visible = FALSE;
268 case tt_trk_trkseg_trkpt:
269 if ( set_c_ll( attr ) ) {
270 c_tp = vik_trackpoint_new ();
271 vik_coord_load_from_latlon ( &(c_tp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
273 c_tp->newsegment = TRUE;
276 c_tr->trackpoints = g_list_append ( c_tr->trackpoints, c_tp );
283 case tt_gpx_keywords:
285 case tt_trk_trkseg_trkpt_name:
286 case tt_trk_trkseg_trkpt_ele:
287 case tt_trk_trkseg_trkpt_time:
298 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer */
302 c_wp = vik_waypoint_new ();
303 c_wp->visible = TRUE;
306 case tt_waypoint_coord:
307 if ( set_c_ll( attr ) )
308 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
311 case tt_waypoint_name:
312 if ( ( tmp = get_attr(attr, "id") ) ) {
314 g_free ( c_wp_name );
315 c_wp_name = g_strdup ( tmp );
317 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer for description */
324 static void gpx_end(VikTrwLayer *vtl, const char *el)
326 static GTimeVal tp_time;
327 static GTimeVal wp_time;
329 g_string_truncate ( xpath, xpath->len - strlen(el) - 1 );
331 switch ( current_tag ) {
334 vik_trw_layer_set_metadata ( vtl, c_md );
339 vik_layer_rename ( VIK_LAYER(vtl), c_cdata->str );
340 g_string_erase ( c_cdata, 0, -1 );
345 g_free ( c_md->description );
346 c_md->author = g_strdup ( c_cdata->str );
347 g_string_erase ( c_cdata, 0, -1 );
351 if ( c_md->description )
352 g_free ( c_md->description );
353 c_md->description = g_strdup ( c_cdata->str );
354 g_string_erase ( c_cdata, 0, -1 );
357 case tt_gpx_keywords:
358 if ( c_md->keywords )
359 g_free ( c_md->keywords );
360 c_md->keywords = g_strdup ( c_cdata->str );
361 g_string_erase ( c_cdata, 0, -1 );
365 if ( c_md->timestamp )
366 g_free ( c_md->timestamp );
367 c_md->timestamp = g_strdup ( c_cdata->str );
368 g_string_erase ( c_cdata, 0, -1 );
374 c_wp_name = g_strdup_printf("VIKING_WP%04d", unnamed_waypoints++);
375 vik_trw_layer_filein_add_waypoint ( vtl, c_wp_name, c_wp );
376 g_free ( c_wp_name );
383 c_tr_name = g_strdup_printf("VIKING_TR%03d", unnamed_tracks++);
384 // Delibrate fall through
387 c_tr_name = g_strdup_printf("VIKING_RT%03d", unnamed_routes++);
388 vik_trw_layer_filein_add_track ( vtl, c_tr_name, c_tr );
389 g_free ( c_tr_name );
396 g_free ( c_wp_name );
397 c_wp_name = g_strdup ( c_cdata->str );
398 g_string_erase ( c_cdata, 0, -1 );
403 g_free ( c_tr_name );
404 c_tr_name = g_strdup ( c_cdata->str );
405 g_string_erase ( c_cdata, 0, -1 );
409 c_wp->altitude = g_ascii_strtod ( c_cdata->str, NULL );
410 g_string_erase ( c_cdata, 0, -1 );
413 case tt_trk_trkseg_trkpt_ele:
414 c_tp->altitude = g_ascii_strtod ( c_cdata->str, NULL );
415 g_string_erase ( c_cdata, 0, -1 );
418 case tt_waypoint_name: /* .loc name is really description. */
420 vik_waypoint_set_description ( c_wp, c_cdata->str );
421 g_string_erase ( c_cdata, 0, -1 );
425 vik_waypoint_set_comment ( c_wp, c_cdata->str );
426 g_string_erase ( c_cdata, 0, -1 );
430 vik_waypoint_set_url ( c_wp, c_cdata->str );
431 g_string_erase ( c_cdata, 0, -1 );
435 vik_waypoint_set_image ( c_wp, c_cdata->str );
436 g_string_erase ( c_cdata, 0, -1 );
440 vik_waypoint_set_symbol ( c_wp, c_cdata->str );
441 g_string_erase ( c_cdata, 0, -1 );
446 vik_track_set_description ( c_tr, c_cdata->str );
447 g_string_erase ( c_cdata, 0, -1 );
451 vik_track_set_comment ( c_tr, c_cdata->str );
452 g_string_erase ( c_cdata, 0, -1 );
456 if ( g_time_val_from_iso8601(c_cdata->str, &wp_time) ) {
457 c_wp->timestamp = wp_time.tv_sec;
458 c_wp->has_timestamp = TRUE;
460 g_string_erase ( c_cdata, 0, -1 );
463 case tt_trk_trkseg_trkpt_name:
464 vik_trackpoint_set_name ( c_tp, c_cdata->str );
465 g_string_erase ( c_cdata, 0, -1 );
468 case tt_trk_trkseg_trkpt_time:
469 if ( g_time_val_from_iso8601(c_cdata->str, &tp_time) ) {
470 c_tp->timestamp = tp_time.tv_sec;
471 c_tp->has_timestamp = TRUE;
473 g_string_erase ( c_cdata, 0, -1 );
476 case tt_trk_trkseg_trkpt_course:
477 c_tp->course = g_ascii_strtod ( c_cdata->str, NULL );
478 g_string_erase ( c_cdata, 0, -1 );
481 case tt_trk_trkseg_trkpt_speed:
482 c_tp->speed = g_ascii_strtod ( c_cdata->str, NULL );
483 g_string_erase ( c_cdata, 0, -1 );
486 case tt_trk_trkseg_trkpt_fix:
487 if (!strcmp("2d", c_cdata->str))
488 c_tp->fix_mode = VIK_GPS_MODE_2D;
489 else if (!strcmp("3d", c_cdata->str))
490 c_tp->fix_mode = VIK_GPS_MODE_3D;
491 else if (!strcmp("dgps", c_cdata->str))
492 c_tp->fix_mode = VIK_GPS_MODE_DGPS;
493 else if (!strcmp("pps", c_cdata->str))
494 c_tp->fix_mode = VIK_GPS_MODE_PPS;
496 c_tp->fix_mode = VIK_GPS_MODE_NOT_SEEN;
497 g_string_erase ( c_cdata, 0, -1 );
500 case tt_trk_trkseg_trkpt_sat:
501 c_tp->nsats = atoi ( c_cdata->str );
502 g_string_erase ( c_cdata, 0, -1 );
505 case tt_trk_trkseg_trkpt_hdop:
506 c_tp->hdop = g_strtod ( c_cdata->str, NULL );
507 g_string_erase ( c_cdata, 0, -1 );
510 case tt_trk_trkseg_trkpt_vdop:
511 c_tp->vdop = g_strtod ( c_cdata->str, NULL );
512 g_string_erase ( c_cdata, 0, -1 );
515 case tt_trk_trkseg_trkpt_pdop:
516 c_tp->pdop = g_strtod ( c_cdata->str, NULL );
517 g_string_erase ( c_cdata, 0, -1 );
523 current_tag = get_tag ( xpath->str );
526 static void gpx_cdata(void *dta, const XML_Char *s, int len)
528 switch ( current_tag ) {
532 case tt_gpx_keywords:
537 case tt_trk_trkseg_trkpt_ele:
545 case tt_trk_trkseg_trkpt_time:
547 case tt_trk_trkseg_trkpt_name:
548 case tt_trk_trkseg_trkpt_course:
549 case tt_trk_trkseg_trkpt_speed:
550 case tt_trk_trkseg_trkpt_fix:
551 case tt_trk_trkseg_trkpt_sat:
552 case tt_trk_trkseg_trkpt_hdop:
553 case tt_trk_trkseg_trkpt_vdop:
554 case tt_trk_trkseg_trkpt_pdop:
555 case tt_waypoint_name: /* .loc name is really description. */
556 g_string_append_len ( c_cdata, s, len );
559 default: break; /* ignore cdata from other things */
563 // make like a "stack" of tag names
564 // like gpspoint's separated like /gpx/wpt/whatever
566 gboolean a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) {
567 XML_Parser parser = XML_ParserCreate(NULL);
569 enum XML_Status status = XML_STATUS_ERROR;
571 XML_SetElementHandler(parser, (XML_StartElementHandler) gpx_start, (XML_EndElementHandler) gpx_end);
572 XML_SetUserData(parser, vtl); /* in the future we could remove all global variables */
573 XML_SetCharacterDataHandler(parser, (XML_CharacterDataHandler) gpx_cdata);
577 g_assert ( f != NULL && vtl != NULL );
579 xpath = g_string_new ( "" );
580 c_cdata = g_string_new ( "" );
582 unnamed_waypoints = 1;
587 len = fread(buf, 1, sizeof(buf)-7, f);
588 done = feof(f) || !len;
589 status = XML_Parse(parser, buf, len, done);
592 XML_ParserFree (parser);
593 g_string_free ( xpath, TRUE );
594 g_string_free ( c_cdata, TRUE );
596 return status != XML_STATUS_ERROR;
599 /**** entitize from GPSBabel ****/
607 entity_types stdentities[] = {
609 { "'", "'", 1 },
612 { "\"", """, 0 },
616 void utf8_to_int( const char *cp, int *bytes, int *value )
618 if ( (*cp & 0xe0) == 0xc0 ) {
619 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
621 *value = ((*cp & 0x1f) << 6) |
624 else if ( (*cp & 0xf0) == 0xe0 ) {
625 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
626 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
628 *value = ((*cp & 0x0f) << 12) |
629 ((*(cp+1) & 0x3f) << 6) |
632 else if ( (*cp & 0xf8) == 0xf0 ) {
633 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
634 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
635 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
637 *value = ((*cp & 0x07) << 18) |
638 ((*(cp+1) & 0x3f) << 12) |
639 ((*(cp+2) & 0x3f) << 6) |
642 else if ( (*cp & 0xfc) == 0xf8 ) {
643 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
644 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
645 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
646 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
648 *value = ((*cp & 0x03) << 24) |
649 ((*(cp+1) & 0x3f) << 18) |
650 ((*(cp+2) & 0x3f) << 12) |
651 ((*(cp+3) & 0x3f) << 6) |
654 else if ( (*cp & 0xfe) == 0xfc ) {
655 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
656 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
657 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
658 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
659 if ( (*(cp+5) & 0xc0) != 0x80 ) goto dodefault;
661 *value = ((*cp & 0x01) << 30) |
662 ((*(cp+1) & 0x3f) << 24) |
663 ((*(cp+2) & 0x3f) << 18) |
664 ((*(cp+3) & 0x3f) << 12) |
665 ((*(cp+4) & 0x3f) << 6) |
671 *value = (unsigned char)*cp;
677 entitize(const char * str)
679 int elen, ecount, nsecount;
682 char * p, * tmp, * xstr;
688 elen = ecount = nsecount = 0;
690 /* figure # of entity replacements and additional size. */
693 while ((cp = strstr(cp, ep->text)) != NULL) {
694 elen += strlen(ep->entity) - strlen(ep->text);
696 cp += strlen(ep->text);
701 /* figure the same for other than standard entities (i.e. anything
702 * that isn't in the range U+0000 to U+007F */
703 for ( cp = str; *cp; cp++ ) {
706 utf8_to_int( cp, &bytes, &value );
708 elen += sprintf( tmpsub, "&#x%x;", value ) - bytes;
713 /* enough space for the whole string plus entity replacements, if any */
714 tmp = g_malloc((strlen(str) + elen + 1));
717 /* no entity replacements */
718 if (ecount == 0 && nsecount == 0)
722 for (ep = stdentities; ep->text; ep++) {
724 while ((p = strstr(p, ep->text)) != NULL) {
725 elen = strlen(ep->entity);
727 xstr = g_strdup(p + strlen(ep->text));
729 strcpy(p, ep->entity);
730 strcpy(p + elen, xstr);
739 if ( nsecount != 0 ) {
743 utf8_to_int( p, &bytes, &value );
745 xstr = g_strdup( p + bytes );
750 sprintf( p, "&#x%x;", value );
764 /**** end GPSBabel code ****/
768 static void gpx_write_waypoint ( VikWaypoint *wp, GpxWritingContext *context )
770 // Don't write invisible waypoints when specified
771 if (context->options && !context->options->hidden && !wp->visible)
774 FILE *f = context->file;
775 static struct LatLon ll;
778 vik_coord_to_latlon ( &(wp->coord), &ll );
779 s_lat = a_coords_dtostr( ll.lat );
780 s_lon = a_coords_dtostr( ll.lon );
781 // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension'
782 // luckily most other GPX processing software ignores things they don't understand
783 fprintf ( f, "<wpt lat=\"%s\" lon=\"%s\"%s>\n",
784 s_lat, s_lon, wp->visible ? "" : " hidden=\"hidden\"" );
790 tmp = entitize ( wp->name );
792 tmp = g_strdup ("waypoint");
794 fprintf ( f, " <name>%s</name>\n", tmp );
797 if ( wp->altitude != VIK_DEFAULT_ALTITUDE )
799 tmp = a_coords_dtostr ( wp->altitude );
800 fprintf ( f, " <ele>%s</ele>\n", tmp );
804 if ( wp->has_timestamp ) {
806 timestamp.tv_sec = wp->timestamp;
807 timestamp.tv_usec = 0;
809 gchar *time_iso8601 = g_time_val_to_iso8601 ( ×tamp );
810 if ( time_iso8601 != NULL )
811 fprintf ( f, " <time>%s</time>\n", time_iso8601 );
812 g_free ( time_iso8601 );
817 tmp = entitize(wp->comment);
818 fprintf ( f, " <cmt>%s</cmt>\n", tmp );
821 if ( wp->description )
823 tmp = entitize(wp->description);
824 fprintf ( f, " <desc>%s</desc>\n", tmp );
829 tmp = entitize(wp->url);
830 fprintf ( f, " <url>%s</url>\n", tmp );
835 tmp = entitize(wp->image);
836 fprintf ( f, " <link>%s</link>\n", tmp );
841 tmp = entitize(wp->symbol);
842 if ( a_vik_gpx_export_wpt_sym_name ( ) ) {
843 // Lowercase the symbol name
844 gchar *tmp2 = g_utf8_strdown ( tmp, -1 );
845 fprintf ( f, " <sym>%s</sym>\n", tmp2 );
849 fprintf ( f, " <sym>%s</sym>\n", tmp);
853 fprintf ( f, "</wpt>\n" );
856 static void gpx_write_trackpoint ( VikTrackpoint *tp, GpxWritingContext *context )
858 FILE *f = context->file;
859 static struct LatLon ll;
860 gchar *s_lat,*s_lon, *s_alt, *s_dop;
862 vik_coord_to_latlon ( &(tp->coord), &ll );
864 // No such thing as a rteseg! So make sure we don't put them in
865 if ( context->options && !context->options->is_route && tp->newsegment )
866 fprintf ( f, " </trkseg>\n <trkseg>\n" );
868 s_lat = a_coords_dtostr( ll.lat );
869 s_lon = a_coords_dtostr( ll.lon );
870 fprintf ( f, " <%spt lat=\"%s\" lon=\"%s\">\n", (context->options && context->options->is_route) ? "rte" : "trk", s_lat, s_lon );
871 g_free ( s_lat ); s_lat = NULL;
872 g_free ( s_lon ); s_lon = NULL;
875 gchar *s_name = entitize(tp->name);
876 fprintf ( f, " <name>%s</name>\n", s_name );
881 if ( tp->altitude != VIK_DEFAULT_ALTITUDE )
883 s_alt = a_coords_dtostr ( tp->altitude );
885 else if ( context->options != NULL && context->options->force_ele )
887 s_alt = a_coords_dtostr ( 0 );
890 fprintf ( f, " <ele>%s</ele>\n", s_alt );
891 g_free ( s_alt ); s_alt = NULL;
894 if ( tp->has_timestamp ) {
896 timestamp.tv_sec = tp->timestamp;
897 timestamp.tv_usec = 0;
899 time_iso8601 = g_time_val_to_iso8601 ( ×tamp );
901 else if ( context->options != NULL && context->options->force_time )
904 g_get_current_time ( ¤t );
906 time_iso8601 = g_time_val_to_iso8601 ( ¤t );
908 if ( time_iso8601 != NULL )
909 fprintf ( f, " <time>%s</time>\n", time_iso8601 );
910 g_free(time_iso8601);
913 if (!isnan(tp->course)) {
914 gchar *s_course = a_coords_dtostr(tp->course);
915 fprintf ( f, " <course>%s</course>\n", s_course );
918 if (!isnan(tp->speed)) {
919 gchar *s_speed = a_coords_dtostr(tp->speed);
920 fprintf ( f, " <speed>%s</speed>\n", s_speed );
923 if (tp->fix_mode == VIK_GPS_MODE_2D)
924 fprintf ( f, " <fix>2d</fix>\n");
925 if (tp->fix_mode == VIK_GPS_MODE_3D)
926 fprintf ( f, " <fix>3d</fix>\n");
927 if (tp->fix_mode == VIK_GPS_MODE_DGPS)
928 fprintf ( f, " <fix>dgps</fix>\n");
929 if (tp->fix_mode == VIK_GPS_MODE_PPS)
930 fprintf ( f, " <fix>pps</fix>\n");
932 fprintf ( f, " <sat>%d</sat>\n", tp->nsats );
935 if ( tp->hdop != VIK_DEFAULT_DOP )
937 s_dop = a_coords_dtostr ( tp->hdop );
940 fprintf ( f, " <hdop>%s</hdop>\n", s_dop );
941 g_free ( s_dop ); s_dop = NULL;
943 if ( tp->vdop != VIK_DEFAULT_DOP )
945 s_dop = a_coords_dtostr ( tp->vdop );
948 fprintf ( f, " <vdop>%s</vdop>\n", s_dop );
949 g_free ( s_dop ); s_dop = NULL;
951 if ( tp->pdop != VIK_DEFAULT_DOP )
953 s_dop = a_coords_dtostr ( tp->pdop );
956 fprintf ( f, " <pdop>%s</pdop>\n", s_dop );
957 g_free ( s_dop ); s_dop = NULL;
959 fprintf ( f, " </%spt>\n", (context->options && context->options->is_route) ? "rte" : "trk" );
963 static void gpx_write_track ( VikTrack *t, GpxWritingContext *context )
965 // Don't write invisible tracks when specified
966 if (context->options && !context->options->hidden && !t->visible)
969 FILE *f = context->file;
971 gboolean first_tp_is_newsegment = FALSE; /* must temporarily make it not so, but we want to restore state. not that it matters. */
975 tmp = entitize ( t->name );
977 tmp = g_strdup ("track");
979 // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension'
980 // luckily most other GPX processing software ignores things they don't understand
981 fprintf ( f, "<%s%s>\n <name>%s</name>\n",
982 t->is_route ? "rte" : "trk",
983 t->visible ? "" : " hidden=\"hidden\"",
989 tmp = entitize ( t->comment );
990 fprintf ( f, " <cmt>%s</cmt>\n", tmp );
994 if ( t->description )
996 tmp = entitize ( t->description );
997 fprintf ( f, " <desc>%s</desc>\n", tmp );
1001 /* No such thing as a rteseg! */
1003 fprintf ( f, " <trkseg>\n" );
1005 if ( t->trackpoints && t->trackpoints->data ) {
1006 first_tp_is_newsegment = VIK_TRACKPOINT(t->trackpoints->data)->newsegment;
1007 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = FALSE; /* so we won't write </trkseg><trkseg> already */
1008 g_list_foreach ( t->trackpoints, (GFunc) gpx_write_trackpoint, context );
1009 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = first_tp_is_newsegment; /* restore state */
1012 /* NB apparently no such thing as a rteseg! */
1014 fprintf ( f, " </trkseg>\n");
1016 fprintf ( f, "</%s>\n", t->is_route ? "rte" : "trk" );
1019 static void gpx_write_header( FILE *f )
1021 fprintf(f, "<?xml version=\"1.0\"?>\n"
1022 "<gpx version=\"1.0\" creator=\"Viking -- http://viking.sf.net/\"\n"
1023 "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
1024 "xmlns=\"http://www.topografix.com/GPX/1/0\"\n"
1025 "xsi:schemaLocation=\"http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd\">\n");
1028 static void gpx_write_footer( FILE *f )
1030 fprintf(f, "</gpx>\n");
1033 static int gpx_waypoint_compare(const void *x, const void *y)
1035 VikWaypoint *a = (VikWaypoint *)x;
1036 VikWaypoint *b = (VikWaypoint *)y;
1037 return strcmp(a->name,b->name);
1040 static int gpx_track_compare_name(const void *x, const void *y)
1042 VikTrack *a = (VikTrack *)x;
1043 VikTrack *b = (VikTrack *)y;
1044 return strcmp(a->name,b->name);
1047 void a_gpx_write_file ( VikTrwLayer *vtl, FILE *f, GpxWritingOptions *options )
1049 GpxWritingContext context = { options, f };
1051 gpx_write_header ( f );
1054 const gchar *name = vik_layer_get_name(VIK_LAYER(vtl));
1056 tmp = entitize ( name );
1057 fprintf ( f, " <name>%s</name>\n", tmp );
1061 VikTRWMetadata *md = vik_trw_layer_get_metadata (vtl);
1064 tmp = entitize ( md->author );
1065 fprintf ( f, " <author>%s</author>\n", tmp );
1068 if ( md->description ) {
1069 tmp = entitize ( md->description );
1070 fprintf ( f, " <desc>%s</desc>\n", tmp );
1073 if ( md->timestamp ) {
1074 tmp = entitize ( md->timestamp );
1075 fprintf ( f, " <time>%s</time>\n", tmp );
1078 if ( md->keywords ) {
1079 tmp = entitize ( md->keywords );
1080 fprintf ( f, " <keywords>%s</keywords>\n", tmp );
1085 if ( vik_trw_layer_get_waypoints_visibility(vtl) || (options && options->hidden) ) {
1086 // gather waypoints in a list, then sort
1087 GList *gl = g_hash_table_get_values ( vik_trw_layer_get_waypoints ( vtl ) );
1088 gl = g_list_sort ( gl, gpx_waypoint_compare );
1090 for (GList *iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) {
1091 gpx_write_waypoint ( (VikWaypoint*)iter->data, &context );
1097 if ( vik_trw_layer_get_tracks_visibility(vtl) || (options && options->hidden) ) {
1098 //gl = g_hash_table_get_values ( vik_trw_layer_get_tracks ( vtl ) );
1099 // Forming the list manually seems to produce one that is more likely to be nearer to the creation order
1100 gpointer key, value;
1101 GHashTableIter ght_iter;
1102 g_hash_table_iter_init ( &ght_iter, vik_trw_layer_get_tracks ( vtl ) );
1103 while ( g_hash_table_iter_next (&ght_iter, &key, &value) ) {
1104 gl = g_list_prepend ( gl ,value );
1106 gl = g_list_reverse ( gl );
1108 // Sort method determined by preference
1109 if ( a_vik_get_gpx_export_trk_sort() == VIK_GPX_EXPORT_TRK_SORT_TIME )
1110 gl = g_list_sort ( gl, vik_track_compare_timestamp );
1111 else if ( a_vik_get_gpx_export_trk_sort() == VIK_GPX_EXPORT_TRK_SORT_ALPHA )
1112 gl = g_list_sort ( gl, gpx_track_compare_name );
1115 GList *glrte = NULL;
1116 // Routes sorted by name
1117 if ( vik_trw_layer_get_tracks_visibility(vtl) || (options && options->hidden) ) {
1118 glrte = g_hash_table_get_values ( vik_trw_layer_get_routes ( vtl ) );
1119 glrte = g_list_sort ( glrte, gpx_track_compare_name );
1122 // g_list_concat doesn't copy memory properly
1123 // so process each list separately
1125 GpxWritingContext context_tmp = context;
1126 GpxWritingOptions opt_tmp = { FALSE, FALSE, FALSE, FALSE };
1127 // Force trackpoints on tracks
1128 if ( !context.options )
1129 context_tmp.options = &opt_tmp;
1130 context_tmp.options->is_route = FALSE;
1132 // Loop around each list and write each one
1133 for (GList *iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) {
1134 gpx_write_track ( (VikTrack*)iter->data, &context_tmp );
1137 // Routes (to get routepoints)
1138 context_tmp.options->is_route = TRUE;
1139 for (GList *iter = g_list_first (glrte); iter != NULL; iter = g_list_next (iter)) {
1140 gpx_write_track ( (VikTrack*)iter->data, &context_tmp );
1144 g_list_free ( glrte );
1146 gpx_write_footer ( f );
1149 void a_gpx_write_track_file ( VikTrack *trk, FILE *f, GpxWritingOptions *options )
1151 GpxWritingContext context = {options, f};
1152 gpx_write_header ( f );
1153 gpx_write_track ( trk, &context );
1154 gpx_write_footer ( f );
1158 * Common write of a temporary GPX file
1160 static gchar* write_tmp_file ( VikTrwLayer *vtl, VikTrack *trk, GpxWritingOptions *options )
1162 gchar *tmp_filename = NULL;
1163 GError *error = NULL;
1164 // Opening temporary file
1165 int fd = g_file_open_tmp("viking_XXXXXX.gpx", &tmp_filename, &error);
1167 g_warning ( _("failed to open temporary file: %s"), error->message );
1168 g_clear_error ( &error );
1171 g_debug ("%s: temporary file = %s", __FUNCTION__, tmp_filename);
1173 FILE *ff = fdopen (fd, "w");
1176 a_gpx_write_track_file ( trk, ff, options );
1178 a_gpx_write_file ( vtl, ff, options );
1182 return tmp_filename;
1186 * a_gpx_write_tmp_file:
1187 * @vtl: The #VikTrwLayer to write
1188 * @options: Possible ways of writing the file data (can be NULL)
1190 * Returns: The name of newly created temporary GPX file
1191 * This file should be removed once used and the string freed.
1192 * If NULL then the process failed.
1194 gchar* a_gpx_write_tmp_file ( VikTrwLayer *vtl, GpxWritingOptions *options )
1196 return write_tmp_file ( vtl, NULL, options );
1200 * a_gpx_write_track_tmp_file:
1201 * @trk: The #VikTrack to write
1202 * @options: Possible ways of writing the file data (can be NULL)
1204 * Returns: The name of newly created temporary GPX file
1205 * This file should be removed once used and the string freed.
1206 * If NULL then the process failed.
1208 gchar* a_gpx_write_track_tmp_file ( VikTrack *trk, GpxWritingOptions *options )
1210 return write_tmp_file ( NULL, trk, options );