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
27 #define _XOPEN_SOURCE /* glibc2 needs this */
35 #define GPX_TIME_FORMAT "%Y-%m-%dT%H:%M:%SZ"
47 tt_wpt_link, /* New in GPX 1.1 */
55 tt_trk_trkseg_trkpt_ele,
56 tt_trk_trkseg_trkpt_time,
58 tt_trk_trkseg_trkpt_course,
59 tt_trk_trkseg_trkpt_speed,
60 tt_trk_trkseg_trkpt_fix,
61 tt_trk_trkseg_trkpt_sat,
68 typedef struct tag_mapping {
69 tag_type tag_type; /* enum from above for this tag */
70 const char *tag_name; /* xpath-ish tag name */
74 * xpath(ish) mappings between full tag paths and internal identifers.
75 * These appear in the order they appear in the GPX specification.
76 * If it's not a tag we explictly handle, it doesn't go here.
79 tag_mapping tag_path_map[] = {
81 { tt_wpt, "/gpx/wpt" },
83 { tt_waypoint, "/loc/waypoint" },
84 { tt_waypoint_coord, "/loc/waypoint/coord" },
85 { tt_waypoint_name, "/loc/waypoint/name" },
87 { tt_wpt_ele, "/gpx/wpt/ele" },
88 { tt_wpt_name, "/gpx/wpt/name" },
89 { tt_wpt_desc, "/gpx/wpt/desc" },
90 { tt_wpt_sym, "/gpx/wpt/sym" },
91 { tt_wpt_sym, "/loc/waypoint/type" },
92 { tt_wpt_link, "/gpx/wpt/link" }, /* GPX 1.1 */
94 { tt_trk, "/gpx/trk" },
95 { tt_trk, "/gpx/rte" },
96 { tt_trk_name, "/gpx/trk/name" },
97 { tt_trk_desc, "/gpx/trk/desc" },
98 { tt_trk_trkseg, "/gpx/trk/trkseg" },
99 { tt_trk_trkseg_trkpt, "/gpx/trk/trkseg/trkpt" },
100 { tt_trk_trkseg_trkpt, "/gpx/rte/rtept" },
101 { tt_trk_trkseg_trkpt_ele, "/gpx/trk/trkseg/trkpt/ele" },
102 { tt_trk_trkseg_trkpt_time, "/gpx/trk/trkseg/trkpt/time" },
104 { tt_trk_trkseg_trkpt_course, "/gpx/trk/trkseg/trkpt/course" },
105 { tt_trk_trkseg_trkpt_speed, "/gpx/trk/trkseg/trkpt/speed" },
106 { tt_trk_trkseg_trkpt_fix, "/gpx/trk/trkseg/trkpt/fix" },
107 { tt_trk_trkseg_trkpt_sat, "/gpx/trk/trkseg/trkpt/sat" },
112 static tag_type get_tag(const char *t)
115 for (tm = tag_path_map; tm->tag_type != 0; tm++)
116 if (0 == strcmp(tm->tag_name, t))
121 /******************************************/
123 tag_type current_tag = tt_unknown;
124 GString *xpath = NULL;
125 GString *c_cdata = NULL;
127 /* current ("c_") objects */
128 VikTrackpoint *c_tp = NULL;
129 VikWaypoint *c_wp = NULL;
130 VikTrack *c_tr = NULL;
132 gchar *c_wp_name = NULL;
133 gchar *c_tr_name = NULL;
135 /* temporary things so we don't have to create them lots of times */
136 const gchar *c_slat, *c_slon;
139 /* specialty flags / etc */
140 gboolean f_tr_newseg;
141 guint unnamed_waypoints = 0;
142 guint unnamed_tracks = 0;
145 static const char *get_attr ( const char **attr, const char *key )
148 if ( strcmp(*attr,key) == 0 )
155 static gboolean set_c_ll ( const char **attr )
157 if ( (c_slat = get_attr ( attr, "lat" )) && (c_slon = get_attr ( attr, "lon" )) ) {
158 c_ll.lat = g_strtod(c_slat, NULL);
159 c_ll.lon = g_strtod(c_slon, NULL);
165 static void gpx_start(VikTrwLayer *vtl, const char *el, const char **attr)
167 static const gchar *tmp;
169 g_string_append_c ( xpath, '/' );
170 g_string_append ( xpath, el );
171 current_tag = get_tag ( xpath->str );
173 switch ( current_tag ) {
176 if ( set_c_ll( attr ) ) {
177 c_wp = vik_waypoint_new ();
178 c_wp->altitude = VIK_DEFAULT_ALTITUDE;
179 if ( ! get_attr ( attr, "hidden" ) )
180 c_wp->visible = TRUE;
182 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
187 c_tr = vik_track_new ();
188 if ( ! get_attr ( attr, "hidden" ) )
189 c_tr->visible = TRUE;
196 case tt_trk_trkseg_trkpt:
197 if ( set_c_ll( attr ) ) {
198 c_tp = vik_trackpoint_new ();
199 c_tp->altitude = VIK_DEFAULT_ALTITUDE;
200 vik_coord_load_from_latlon ( &(c_tp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
202 c_tp->newsegment = TRUE;
205 c_tr->trackpoints = g_list_append ( c_tr->trackpoints, c_tp );
209 case tt_trk_trkseg_trkpt_ele:
210 case tt_trk_trkseg_trkpt_time:
217 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer */
221 c_wp = vik_waypoint_new ();
222 c_wp->altitude = VIK_DEFAULT_ALTITUDE;
223 c_wp->visible = TRUE;
226 case tt_waypoint_coord:
227 if ( set_c_ll( attr ) )
228 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
231 case tt_waypoint_name:
232 if ( ( tmp = get_attr(attr, "id") ) ) {
234 g_free ( c_wp_name );
235 c_wp_name = g_strdup ( tmp );
237 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer for description */
244 static void gpx_end(VikTrwLayer *vtl, const char *el)
247 g_string_truncate ( xpath, xpath->len - strlen(el) - 1 );
249 switch ( current_tag ) {
254 c_wp_name = g_strdup_printf("VIKING_WP%d", unnamed_waypoints++);
255 vik_trw_layer_filein_add_waypoint ( vtl, c_wp_name, c_wp );
256 g_free ( c_wp_name );
263 c_tr_name = g_strdup_printf("VIKING_TR%d", unnamed_waypoints++);
264 vik_trw_layer_filein_add_track ( vtl, c_tr_name, c_tr );
265 g_free ( c_tr_name );
272 g_free ( c_wp_name );
273 c_wp_name = g_strdup ( c_cdata->str );
274 g_string_erase ( c_cdata, 0, -1 );
279 g_free ( c_tr_name );
280 c_tr_name = g_strdup ( c_cdata->str );
281 g_string_erase ( c_cdata, 0, -1 );
285 c_wp->altitude = g_strtod ( c_cdata->str, NULL );
286 g_string_erase ( c_cdata, 0, -1 );
289 case tt_trk_trkseg_trkpt_ele:
290 c_tp->altitude = g_strtod ( c_cdata->str, NULL );
291 g_string_erase ( c_cdata, 0, -1 );
294 case tt_waypoint_name: /* .loc name is really description. */
296 vik_waypoint_set_comment ( c_wp, c_cdata->str );
297 g_string_erase ( c_cdata, 0, -1 );
301 vik_waypoint_set_image ( c_wp, c_cdata->str );
302 g_string_erase ( c_cdata, 0, -1 );
306 gchar *tmp_lower = g_utf8_strdown(c_cdata->str, -1); /* for things like <type>Geocache</type> */
307 vik_waypoint_set_symbol ( c_wp, tmp_lower );
308 g_free ( tmp_lower );
309 g_string_erase ( c_cdata, 0, -1 );
314 vik_track_set_comment ( c_tr, c_cdata->str );
315 g_string_erase ( c_cdata, 0, -1 );
318 case tt_trk_trkseg_trkpt_time:
320 if ( strptime(c_cdata->str, GPX_TIME_FORMAT, &tm) != c_cdata->str ) { /* it read at least one char */
321 c_tp->timestamp = mktime(&tm);
322 c_tp->has_timestamp = TRUE;
324 g_string_erase ( c_cdata, 0, -1 );
327 case tt_trk_trkseg_trkpt_course:
328 c_tp->extended = TRUE;
329 c_tp->course = g_strtod ( c_cdata->str, NULL );
330 g_string_erase ( c_cdata, 0, -1 );
333 case tt_trk_trkseg_trkpt_speed:
334 c_tp->extended = TRUE;
335 c_tp->speed = g_strtod ( c_cdata->str, NULL );
336 g_string_erase ( c_cdata, 0, -1 );
339 case tt_trk_trkseg_trkpt_fix:
340 c_tp->extended = TRUE;
341 if (!strcmp("2d", c_cdata->str))
342 c_tp->fix_mode = VIK_GPS_MODE_2D;
343 else if (!strcmp("3d", c_cdata->str))
344 c_tp->fix_mode = VIK_GPS_MODE_3D;
345 else /* TODO: more fix modes here */
346 c_tp->fix_mode = VIK_GPS_MODE_NOT_SEEN;
347 g_string_erase ( c_cdata, 0, -1 );
350 case tt_trk_trkseg_trkpt_sat:
351 c_tp->extended = TRUE;
352 c_tp->nsats = atoi ( c_cdata->str );
353 g_string_erase ( c_cdata, 0, -1 );
359 current_tag = get_tag ( xpath->str );
362 static void gpx_cdata(void *dta, const XML_Char *s, int len)
364 switch ( current_tag ) {
368 case tt_trk_trkseg_trkpt_ele:
373 case tt_trk_trkseg_trkpt_time:
374 case tt_trk_trkseg_trkpt_course:
375 case tt_trk_trkseg_trkpt_speed:
376 case tt_trk_trkseg_trkpt_fix:
377 case tt_trk_trkseg_trkpt_sat:
378 case tt_waypoint_name: /* .loc name is really description. */
379 g_string_append_len ( c_cdata, s, len );
382 default: break; /* ignore cdata from other things */
386 // make like a "stack" of tag names
387 // like gpspoint's separated like /gpx/wpt/whatever
389 void a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) {
390 XML_Parser parser = XML_ParserCreate(NULL);
393 XML_SetElementHandler(parser, (XML_StartElementHandler) gpx_start, (XML_EndElementHandler) gpx_end);
394 XML_SetUserData(parser, vtl); /* in the future we could remove all global variables */
395 XML_SetCharacterDataHandler(parser, (XML_CharacterDataHandler) gpx_cdata);
399 g_assert ( f != NULL && vtl != NULL );
401 xpath = g_string_new ( "" );
402 c_cdata = g_string_new ( "" );
404 unnamed_waypoints = 0;
408 len = fread(buf, 1, sizeof(buf)-7, f);
409 done = feof(f) || !len;
410 XML_Parse(parser, buf, len, done);
413 g_string_free ( xpath, TRUE );
414 g_string_free ( c_cdata, TRUE );
417 /**** entitize from GPSBabel ****/
425 entity_types stdentities[] = {
427 { "'", "'", 1 },
430 { "\"", """, 0 },
434 void utf8_to_int( const char *cp, int *bytes, int *value )
436 if ( (*cp & 0xe0) == 0xc0 ) {
437 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
439 *value = ((*cp & 0x1f) << 6) |
442 else if ( (*cp & 0xf0) == 0xe0 ) {
443 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
444 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
446 *value = ((*cp & 0x0f) << 12) |
447 ((*(cp+1) & 0x3f) << 6) |
450 else if ( (*cp & 0xf8) == 0xf0 ) {
451 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
452 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
453 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
455 *value = ((*cp & 0x07) << 18) |
456 ((*(cp+1) & 0x3f) << 12) |
457 ((*(cp+2) & 0x3f) << 6) |
460 else if ( (*cp & 0xfc) == 0xf8 ) {
461 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
462 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
463 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
464 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
466 *value = ((*cp & 0x03) << 24) |
467 ((*(cp+1) & 0x3f) << 18) |
468 ((*(cp+2) & 0x3f) << 12) |
469 ((*(cp+3) & 0x3f) << 6) |
472 else if ( (*cp & 0xfe) == 0xfc ) {
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;
477 if ( (*(cp+5) & 0xc0) != 0x80 ) goto dodefault;
479 *value = ((*cp & 0x01) << 30) |
480 ((*(cp+1) & 0x3f) << 24) |
481 ((*(cp+2) & 0x3f) << 18) |
482 ((*(cp+3) & 0x3f) << 12) |
483 ((*(cp+4) & 0x3f) << 6) |
489 *value = (unsigned char)*cp;
495 entitize(const char * str)
497 int elen, ecount, nsecount;
500 char * p, * tmp, * xstr;
506 elen = ecount = nsecount = 0;
508 /* figure # of entity replacements and additional size. */
511 while ((cp = strstr(cp, ep->text)) != NULL) {
512 elen += strlen(ep->entity) - strlen(ep->text);
514 cp += strlen(ep->text);
519 /* figure the same for other than standard entities (i.e. anything
520 * that isn't in the range U+0000 to U+007F */
521 for ( cp = str; *cp; cp++ ) {
524 utf8_to_int( cp, &bytes, &value );
526 elen += sprintf( tmpsub, "&#x%x;", value ) - bytes;
531 /* enough space for the whole string plus entity replacements, if any */
532 tmp = g_malloc((strlen(str) + elen + 1));
535 /* no entity replacements */
536 if (ecount == 0 && nsecount == 0)
540 for (ep = stdentities; ep->text; ep++) {
542 while ((p = strstr(p, ep->text)) != NULL) {
543 elen = strlen(ep->entity);
545 xstr = g_strdup(p + strlen(ep->text));
547 strcpy(p, ep->entity);
548 strcpy(p + elen, xstr);
557 if ( nsecount != 0 ) {
561 utf8_to_int( p, &bytes, &value );
563 xstr = g_strdup( p + bytes );
568 sprintf( p, "&#x%x;", value );
582 /**** end GPSBabel code ****/
586 static void gpx_write_waypoint ( const gchar *name, VikWaypoint *wp, FILE *f )
588 static struct LatLon ll;
591 vik_coord_to_latlon ( &(wp->coord), &ll );
592 s_lat = a_coords_dtostr( ll.lat );
593 s_lon = a_coords_dtostr( ll.lon );
594 fprintf ( f, "<wpt lat=\"%s\" lon=\"%s\"%s>\n",
595 s_lat, s_lon, wp->visible ? "" : " hidden=\"hidden\"" );
599 tmp = entitize ( name );
600 fprintf ( f, " <name>%s</name>\n", tmp );
603 if ( wp->altitude != VIK_DEFAULT_ALTITUDE )
605 tmp = a_coords_dtostr ( wp->altitude );
606 fprintf ( f, " <ele>%s</ele>\n", tmp );
611 tmp = entitize(wp->comment);
612 fprintf ( f, " <desc>%s</desc>\n", tmp );
617 tmp = entitize(wp->image);
618 fprintf ( f, " <link>%s</link>\n", tmp );
623 tmp = entitize(wp->symbol);
624 fprintf ( f, " <sym>%s</sym>\n", tmp);
628 fprintf ( f, "</wpt>\n" );
631 static void gpx_write_trackpoint ( VikTrackpoint *tp, FILE *f )
633 static struct LatLon ll;
634 gchar *s_lat,*s_lon, *s_alt;
635 static gchar time_buf[30];
636 vik_coord_to_latlon ( &(tp->coord), &ll );
638 if ( tp->newsegment )
639 fprintf ( f, " </trkseg>\n <trkseg>\n" );
641 s_lat = a_coords_dtostr( ll.lat );
642 s_lon = a_coords_dtostr( ll.lon );
643 fprintf ( f, " <trkpt lat=\"%s\" lon=\"%s\">\n", s_lat, s_lon );
647 if ( tp->altitude != VIK_DEFAULT_ALTITUDE )
649 s_alt = a_coords_dtostr ( tp->altitude );
651 else /* Modified to always include altitude, needed for OSM export */
653 s_alt = a_coords_dtostr ( 0 );
655 fprintf ( f, " <ele>%s</ele>\n", s_alt );
658 if ( tp->has_timestamp ) {
659 time_buf [ strftime ( time_buf, sizeof(time_buf)-1, GPX_TIME_FORMAT, localtime(&(tp->timestamp)) ) ] = '\0';
661 else /* Modified to always include time, needed for OSM export */
666 time_buf [strftime ( time_buf, sizeof(time_buf)-1, GPX_TIME_FORMAT, localtime(&rawtime)) ] ='\0';
668 fprintf ( f, " <time>%s</time>\n", time_buf );
670 if (tp->extended && (tp->fix_mode >= VIK_GPS_MODE_2D)) {
671 if (!isnan(tp->course)) {
672 gchar *s_course = a_coords_dtostr(tp->course);
673 fprintf ( f, " <course>%s</course>\n", s_course );
676 if (!isnan(tp->speed)) {
677 gchar *s_speed = a_coords_dtostr(tp->speed);
678 fprintf ( f, " <speed>%s</speed>\n", s_speed );
681 if (tp->fix_mode == VIK_GPS_MODE_2D)
682 fprintf ( f, " <fix>2d</fix>\n");
683 if (tp->fix_mode == VIK_GPS_MODE_3D)
684 fprintf ( f, " <fix>3d</fix>\n");
686 fprintf ( f, " <sat>%d</sat>\n", tp->nsats );
689 fprintf ( f, " </trkpt>\n" );
693 static void gpx_write_track ( const gchar *name, VikTrack *t, FILE *f )
696 gboolean first_tp_is_newsegment = FALSE; /* must temporarily make it not so, but we want to restore state. not that it matters. */
698 tmp = entitize ( name );
699 fprintf ( f, "<trk%s>\n <name>%s</name>\n", t->visible ? "" : " hidden=\"hidden\"", tmp );
704 tmp = entitize ( t->comment );
705 fprintf ( f, " <desc>%s</desc>\n", tmp );
709 fprintf ( f, " <trkseg>\n" );
711 if ( t->trackpoints && t->trackpoints->data ) {
712 first_tp_is_newsegment = VIK_TRACKPOINT(t->trackpoints->data)->newsegment;
713 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = FALSE; /* so we won't write </trkseg><trkseg> already */
714 g_list_foreach ( t->trackpoints, (GFunc) gpx_write_trackpoint, f );
715 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = first_tp_is_newsegment; /* restore state */
718 fprintf ( f, "</trkseg>\n</trk>\n" );
721 static void gpx_write_header( FILE *f )
723 fprintf(f, "<?xml version=\"1.0\"?>\n"
724 "<gpx version=\"1.0\" creator=\"Viking -- http://viking.sf.net/\"\n"
725 "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
726 "xmlns=\"http://www.topografix.com/GPX/1/0\"\n"
727 "xsi:schemaLocation=\"http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd\">\n");
730 static void gpx_write_footer( FILE *f )
732 fprintf(f, "</gpx>\n");
740 } gpx_waypoint_and_name;
743 gpx_waypoint_and_name *wps;
746 } gpx_gather_waypoints_passalong_t;
748 static void gpx_collect_waypoint ( const gchar *name, VikWaypoint *wp, gpx_gather_waypoints_passalong_t *passalong )
750 if ( passalong->i < passalong->n_wps ) {
751 passalong->wps[passalong->i].name = name;
752 passalong->wps[passalong->i].wp = wp;
757 static int gpx_waypoint_and_name_compar(const void *x, const void *y)
759 gpx_waypoint_and_name *a = (gpx_waypoint_and_name *)x;
760 gpx_waypoint_and_name *b = (gpx_waypoint_and_name *)y;
761 return strcmp(a->name,b->name);
764 void a_gpx_write_file( VikTrwLayer *vtl, FILE *f )
768 gpx_write_header ( f );
770 gpx_gather_waypoints_passalong_t passalong;
771 passalong.n_wps = g_hash_table_size ( vik_trw_layer_get_waypoints ( vtl ) );
773 passalong.wps = g_new(gpx_waypoint_and_name,passalong.n_wps);
774 g_hash_table_foreach ( vik_trw_layer_get_waypoints ( vtl ), (GHFunc) gpx_collect_waypoint, &passalong );
775 /* gather waypoints in a list, then sort */
776 qsort(passalong.wps, passalong.n_wps, sizeof(gpx_waypoint_and_name), gpx_waypoint_and_name_compar);
777 for ( i = 0; i < passalong.n_wps; i++ )
778 gpx_write_waypoint ( passalong.wps[i].name, passalong.wps[i].wp, f);
779 g_free ( passalong.wps );
781 g_hash_table_foreach ( vik_trw_layer_get_tracks ( vtl ), (GHFunc) gpx_write_track, f );
783 gpx_write_footer ( f );
786 void a_gpx_write_track_file ( const gchar *name, VikTrack *t, FILE *f )
788 gpx_write_header ( f );
789 gpx_write_track ( name, t, f );
790 gpx_write_footer ( f );