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 */
36 #define GPX_TIME_FORMAT "%Y-%m-%dT%H:%M:%SZ"
48 tt_wpt_link, /* New in GPX 1.1 */
56 tt_trk_trkseg_trkpt_ele,
57 tt_trk_trkseg_trkpt_time,
59 tt_trk_trkseg_trkpt_course,
60 tt_trk_trkseg_trkpt_speed,
61 tt_trk_trkseg_trkpt_fix,
62 tt_trk_trkseg_trkpt_sat,
69 typedef struct tag_mapping {
70 tag_type tag_type; /* enum from above for this tag */
71 const char *tag_name; /* xpath-ish tag name */
75 GpxWritingOptions *options;
80 * xpath(ish) mappings between full tag paths and internal identifers.
81 * These appear in the order they appear in the GPX specification.
82 * If it's not a tag we explictly handle, it doesn't go here.
85 tag_mapping tag_path_map[] = {
87 { tt_wpt, "/gpx/wpt" },
89 { tt_waypoint, "/loc/waypoint" },
90 { tt_waypoint_coord, "/loc/waypoint/coord" },
91 { tt_waypoint_name, "/loc/waypoint/name" },
93 { tt_wpt_ele, "/gpx/wpt/ele" },
94 { tt_wpt_name, "/gpx/wpt/name" },
95 { tt_wpt_desc, "/gpx/wpt/desc" },
96 { tt_wpt_sym, "/gpx/wpt/sym" },
97 { tt_wpt_sym, "/loc/waypoint/type" },
98 { tt_wpt_link, "/gpx/wpt/link" }, /* GPX 1.1 */
100 { tt_trk, "/gpx/trk" },
101 { tt_trk, "/gpx/rte" },
102 { tt_trk_name, "/gpx/trk/name" },
103 { tt_trk_desc, "/gpx/trk/desc" },
104 { tt_trk_trkseg, "/gpx/trk/trkseg" },
105 { tt_trk_trkseg_trkpt, "/gpx/trk/trkseg/trkpt" },
106 { tt_trk_trkseg_trkpt, "/gpx/rte/rtept" },
107 { tt_trk_trkseg_trkpt_ele, "/gpx/trk/trkseg/trkpt/ele" },
108 { tt_trk_trkseg_trkpt_time, "/gpx/trk/trkseg/trkpt/time" },
110 { tt_trk_trkseg_trkpt_course, "/gpx/trk/trkseg/trkpt/course" },
111 { tt_trk_trkseg_trkpt_speed, "/gpx/trk/trkseg/trkpt/speed" },
112 { tt_trk_trkseg_trkpt_fix, "/gpx/trk/trkseg/trkpt/fix" },
113 { tt_trk_trkseg_trkpt_sat, "/gpx/trk/trkseg/trkpt/sat" },
118 static tag_type get_tag(const char *t)
121 for (tm = tag_path_map; tm->tag_type != 0; tm++)
122 if (0 == strcmp(tm->tag_name, t))
127 /******************************************/
129 tag_type current_tag = tt_unknown;
130 GString *xpath = NULL;
131 GString *c_cdata = NULL;
133 /* current ("c_") objects */
134 VikTrackpoint *c_tp = NULL;
135 VikWaypoint *c_wp = NULL;
136 VikTrack *c_tr = NULL;
138 gchar *c_wp_name = NULL;
139 gchar *c_tr_name = NULL;
141 /* temporary things so we don't have to create them lots of times */
142 const gchar *c_slat, *c_slon;
145 /* specialty flags / etc */
146 gboolean f_tr_newseg;
147 guint unnamed_waypoints = 0;
148 guint unnamed_tracks = 0;
151 static const char *get_attr ( const char **attr, const char *key )
154 if ( strcmp(*attr,key) == 0 )
161 static gboolean set_c_ll ( const char **attr )
163 if ( (c_slat = get_attr ( attr, "lat" )) && (c_slon = get_attr ( attr, "lon" )) ) {
164 c_ll.lat = g_strtod(c_slat, NULL);
165 c_ll.lon = g_strtod(c_slon, NULL);
171 static void gpx_start(VikTrwLayer *vtl, const char *el, const char **attr)
173 static const gchar *tmp;
175 g_string_append_c ( xpath, '/' );
176 g_string_append ( xpath, el );
177 current_tag = get_tag ( xpath->str );
179 switch ( current_tag ) {
182 if ( set_c_ll( attr ) ) {
183 c_wp = vik_waypoint_new ();
184 c_wp->altitude = VIK_DEFAULT_ALTITUDE;
185 if ( ! get_attr ( attr, "hidden" ) )
186 c_wp->visible = TRUE;
188 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
193 c_tr = vik_track_new ();
194 if ( ! get_attr ( attr, "hidden" ) )
195 c_tr->visible = TRUE;
202 case tt_trk_trkseg_trkpt:
203 if ( set_c_ll( attr ) ) {
204 c_tp = vik_trackpoint_new ();
205 c_tp->altitude = VIK_DEFAULT_ALTITUDE;
206 vik_coord_load_from_latlon ( &(c_tp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
208 c_tp->newsegment = TRUE;
211 c_tr->trackpoints = g_list_append ( c_tr->trackpoints, c_tp );
215 case tt_trk_trkseg_trkpt_ele:
216 case tt_trk_trkseg_trkpt_time:
223 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer */
227 c_wp = vik_waypoint_new ();
228 c_wp->altitude = VIK_DEFAULT_ALTITUDE;
229 c_wp->visible = TRUE;
232 case tt_waypoint_coord:
233 if ( set_c_ll( attr ) )
234 vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
237 case tt_waypoint_name:
238 if ( ( tmp = get_attr(attr, "id") ) ) {
240 g_free ( c_wp_name );
241 c_wp_name = g_strdup ( tmp );
243 g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer for description */
250 static void gpx_end(VikTrwLayer *vtl, const char *el)
253 g_string_truncate ( xpath, xpath->len - strlen(el) - 1 );
255 switch ( current_tag ) {
260 c_wp_name = g_strdup_printf("VIKING_WP%d", unnamed_waypoints++);
261 vik_trw_layer_filein_add_waypoint ( vtl, c_wp_name, c_wp );
262 g_free ( c_wp_name );
269 c_tr_name = g_strdup_printf("VIKING_TR%d", unnamed_waypoints++);
270 vik_trw_layer_filein_add_track ( vtl, c_tr_name, c_tr );
271 g_free ( c_tr_name );
278 g_free ( c_wp_name );
279 c_wp_name = g_strdup ( c_cdata->str );
280 g_string_erase ( c_cdata, 0, -1 );
285 g_free ( c_tr_name );
286 c_tr_name = g_strdup ( c_cdata->str );
287 g_string_erase ( c_cdata, 0, -1 );
291 c_wp->altitude = g_strtod ( c_cdata->str, NULL );
292 g_string_erase ( c_cdata, 0, -1 );
295 case tt_trk_trkseg_trkpt_ele:
296 c_tp->altitude = g_strtod ( c_cdata->str, NULL );
297 g_string_erase ( c_cdata, 0, -1 );
300 case tt_waypoint_name: /* .loc name is really description. */
302 vik_waypoint_set_comment ( c_wp, c_cdata->str );
303 g_string_erase ( c_cdata, 0, -1 );
307 vik_waypoint_set_image ( c_wp, c_cdata->str );
308 g_string_erase ( c_cdata, 0, -1 );
312 gchar *tmp_lower = g_utf8_strdown(c_cdata->str, -1); /* for things like <type>Geocache</type> */
313 vik_waypoint_set_symbol ( c_wp, tmp_lower );
314 g_free ( tmp_lower );
315 g_string_erase ( c_cdata, 0, -1 );
320 vik_track_set_comment ( c_tr, c_cdata->str );
321 g_string_erase ( c_cdata, 0, -1 );
324 case tt_trk_trkseg_trkpt_time:
326 if ( strptime(c_cdata->str, GPX_TIME_FORMAT, &tm) != c_cdata->str ) { /* it read at least one char */
327 c_tp->timestamp = mktime(&tm);
328 c_tp->has_timestamp = TRUE;
330 g_string_erase ( c_cdata, 0, -1 );
333 case tt_trk_trkseg_trkpt_course:
334 c_tp->extended = TRUE;
335 c_tp->course = g_strtod ( c_cdata->str, NULL );
336 g_string_erase ( c_cdata, 0, -1 );
339 case tt_trk_trkseg_trkpt_speed:
340 c_tp->extended = TRUE;
341 c_tp->speed = g_strtod ( c_cdata->str, NULL );
342 g_string_erase ( c_cdata, 0, -1 );
345 case tt_trk_trkseg_trkpt_fix:
346 c_tp->extended = TRUE;
347 if (!strcmp("2d", c_cdata->str))
348 c_tp->fix_mode = VIK_GPS_MODE_2D;
349 else if (!strcmp("3d", c_cdata->str))
350 c_tp->fix_mode = VIK_GPS_MODE_3D;
351 else /* TODO: more fix modes here */
352 c_tp->fix_mode = VIK_GPS_MODE_NOT_SEEN;
353 g_string_erase ( c_cdata, 0, -1 );
356 case tt_trk_trkseg_trkpt_sat:
357 c_tp->extended = TRUE;
358 c_tp->nsats = atoi ( c_cdata->str );
359 g_string_erase ( c_cdata, 0, -1 );
365 current_tag = get_tag ( xpath->str );
368 static void gpx_cdata(void *dta, const XML_Char *s, int len)
370 switch ( current_tag ) {
374 case tt_trk_trkseg_trkpt_ele:
379 case tt_trk_trkseg_trkpt_time:
380 case tt_trk_trkseg_trkpt_course:
381 case tt_trk_trkseg_trkpt_speed:
382 case tt_trk_trkseg_trkpt_fix:
383 case tt_trk_trkseg_trkpt_sat:
384 case tt_waypoint_name: /* .loc name is really description. */
385 g_string_append_len ( c_cdata, s, len );
388 default: break; /* ignore cdata from other things */
392 // make like a "stack" of tag names
393 // like gpspoint's separated like /gpx/wpt/whatever
395 void a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) {
396 XML_Parser parser = XML_ParserCreate(NULL);
399 XML_SetElementHandler(parser, (XML_StartElementHandler) gpx_start, (XML_EndElementHandler) gpx_end);
400 XML_SetUserData(parser, vtl); /* in the future we could remove all global variables */
401 XML_SetCharacterDataHandler(parser, (XML_CharacterDataHandler) gpx_cdata);
405 g_assert ( f != NULL && vtl != NULL );
407 xpath = g_string_new ( "" );
408 c_cdata = g_string_new ( "" );
410 unnamed_waypoints = 0;
414 len = fread(buf, 1, sizeof(buf)-7, f);
415 done = feof(f) || !len;
416 XML_Parse(parser, buf, len, done);
419 g_string_free ( xpath, TRUE );
420 g_string_free ( c_cdata, TRUE );
423 /**** entitize from GPSBabel ****/
431 entity_types stdentities[] = {
433 { "'", "'", 1 },
436 { "\"", """, 0 },
440 void utf8_to_int( const char *cp, int *bytes, int *value )
442 if ( (*cp & 0xe0) == 0xc0 ) {
443 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
445 *value = ((*cp & 0x1f) << 6) |
448 else if ( (*cp & 0xf0) == 0xe0 ) {
449 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
450 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
452 *value = ((*cp & 0x0f) << 12) |
453 ((*(cp+1) & 0x3f) << 6) |
456 else if ( (*cp & 0xf8) == 0xf0 ) {
457 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
458 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
459 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
461 *value = ((*cp & 0x07) << 18) |
462 ((*(cp+1) & 0x3f) << 12) |
463 ((*(cp+2) & 0x3f) << 6) |
466 else if ( (*cp & 0xfc) == 0xf8 ) {
467 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
468 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
469 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
470 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
472 *value = ((*cp & 0x03) << 24) |
473 ((*(cp+1) & 0x3f) << 18) |
474 ((*(cp+2) & 0x3f) << 12) |
475 ((*(cp+3) & 0x3f) << 6) |
478 else if ( (*cp & 0xfe) == 0xfc ) {
479 if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
480 if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
481 if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
482 if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
483 if ( (*(cp+5) & 0xc0) != 0x80 ) goto dodefault;
485 *value = ((*cp & 0x01) << 30) |
486 ((*(cp+1) & 0x3f) << 24) |
487 ((*(cp+2) & 0x3f) << 18) |
488 ((*(cp+3) & 0x3f) << 12) |
489 ((*(cp+4) & 0x3f) << 6) |
495 *value = (unsigned char)*cp;
501 entitize(const char * str)
503 int elen, ecount, nsecount;
506 char * p, * tmp, * xstr;
512 elen = ecount = nsecount = 0;
514 /* figure # of entity replacements and additional size. */
517 while ((cp = strstr(cp, ep->text)) != NULL) {
518 elen += strlen(ep->entity) - strlen(ep->text);
520 cp += strlen(ep->text);
525 /* figure the same for other than standard entities (i.e. anything
526 * that isn't in the range U+0000 to U+007F */
527 for ( cp = str; *cp; cp++ ) {
530 utf8_to_int( cp, &bytes, &value );
532 elen += sprintf( tmpsub, "&#x%x;", value ) - bytes;
537 /* enough space for the whole string plus entity replacements, if any */
538 tmp = g_malloc((strlen(str) + elen + 1));
541 /* no entity replacements */
542 if (ecount == 0 && nsecount == 0)
546 for (ep = stdentities; ep->text; ep++) {
548 while ((p = strstr(p, ep->text)) != NULL) {
549 elen = strlen(ep->entity);
551 xstr = g_strdup(p + strlen(ep->text));
553 strcpy(p, ep->entity);
554 strcpy(p + elen, xstr);
563 if ( nsecount != 0 ) {
567 utf8_to_int( p, &bytes, &value );
569 xstr = g_strdup( p + bytes );
574 sprintf( p, "&#x%x;", value );
588 /**** end GPSBabel code ****/
592 static void gpx_write_waypoint ( const gchar *name, VikWaypoint *wp, GpxWritingContext *context )
594 FILE *f = context->file;
595 static struct LatLon ll;
598 vik_coord_to_latlon ( &(wp->coord), &ll );
599 s_lat = a_coords_dtostr( ll.lat );
600 s_lon = a_coords_dtostr( ll.lon );
601 fprintf ( f, "<wpt lat=\"%s\" lon=\"%s\"%s>\n",
602 s_lat, s_lon, wp->visible ? "" : " hidden=\"hidden\"" );
606 tmp = entitize ( name );
607 fprintf ( f, " <name>%s</name>\n", tmp );
610 if ( wp->altitude != VIK_DEFAULT_ALTITUDE )
612 tmp = a_coords_dtostr ( wp->altitude );
613 fprintf ( f, " <ele>%s</ele>\n", tmp );
618 tmp = entitize(wp->comment);
619 fprintf ( f, " <desc>%s</desc>\n", tmp );
624 tmp = entitize(wp->image);
625 fprintf ( f, " <link>%s</link>\n", tmp );
630 tmp = entitize(wp->symbol);
631 fprintf ( f, " <sym>%s</sym>\n", tmp);
635 fprintf ( f, "</wpt>\n" );
638 static void gpx_write_trackpoint ( VikTrackpoint *tp, GpxWritingContext *context )
640 FILE *f = context->file;
641 static struct LatLon ll;
642 gchar *s_lat,*s_lon, *s_alt;
643 static gchar time_buf[30];
644 vik_coord_to_latlon ( &(tp->coord), &ll );
646 if ( tp->newsegment )
647 fprintf ( f, " </trkseg>\n <trkseg>\n" );
649 s_lat = a_coords_dtostr( ll.lat );
650 s_lon = a_coords_dtostr( ll.lon );
651 fprintf ( f, " <trkpt lat=\"%s\" lon=\"%s\">\n", s_lat, s_lon );
652 g_free ( s_lat ); s_lat = NULL;
653 g_free ( s_lon ); s_lon = NULL;
656 if ( tp->altitude != VIK_DEFAULT_ALTITUDE )
658 s_alt = a_coords_dtostr ( tp->altitude );
660 else if ( context->options != NULL && context->options->force_ele )
662 s_alt = a_coords_dtostr ( 0 );
665 fprintf ( f, " <ele>%s</ele>\n", s_alt );
666 g_free ( s_alt ); s_alt = NULL;
669 if ( tp->has_timestamp ) {
670 time_buf [ strftime ( time_buf, sizeof(time_buf)-1, GPX_TIME_FORMAT, localtime(&(tp->timestamp)) ) ] = '\0';
672 else if ( context->options != NULL && context->options->force_time )
677 time_buf [strftime ( time_buf, sizeof(time_buf)-1, GPX_TIME_FORMAT, localtime(&rawtime)) ] ='\0';
679 if ( time_buf[0] != '\0' )
680 fprintf ( f, " <time>%s</time>\n", time_buf );
682 if (tp->extended && (tp->fix_mode >= VIK_GPS_MODE_2D)) {
683 if (!isnan(tp->course)) {
684 gchar *s_course = a_coords_dtostr(tp->course);
685 fprintf ( f, " <course>%s</course>\n", s_course );
688 if (!isnan(tp->speed)) {
689 gchar *s_speed = a_coords_dtostr(tp->speed);
690 fprintf ( f, " <speed>%s</speed>\n", s_speed );
693 if (tp->fix_mode == VIK_GPS_MODE_2D)
694 fprintf ( f, " <fix>2d</fix>\n");
695 if (tp->fix_mode == VIK_GPS_MODE_3D)
696 fprintf ( f, " <fix>3d</fix>\n");
698 fprintf ( f, " <sat>%d</sat>\n", tp->nsats );
701 fprintf ( f, " </trkpt>\n" );
705 static void gpx_write_track ( const gchar *name, VikTrack *t, GpxWritingContext *context )
707 FILE *f = context->file;
709 gboolean first_tp_is_newsegment = FALSE; /* must temporarily make it not so, but we want to restore state. not that it matters. */
711 tmp = entitize ( name );
712 fprintf ( f, "<trk%s>\n <name>%s</name>\n", t->visible ? "" : " hidden=\"hidden\"", tmp );
717 tmp = entitize ( t->comment );
718 fprintf ( f, " <desc>%s</desc>\n", tmp );
722 fprintf ( f, " <trkseg>\n" );
724 if ( t->trackpoints && t->trackpoints->data ) {
725 first_tp_is_newsegment = VIK_TRACKPOINT(t->trackpoints->data)->newsegment;
726 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = FALSE; /* so we won't write </trkseg><trkseg> already */
727 g_list_foreach ( t->trackpoints, (GFunc) gpx_write_trackpoint, context );
728 VIK_TRACKPOINT(t->trackpoints->data)->newsegment = first_tp_is_newsegment; /* restore state */
731 fprintf ( f, "</trkseg>\n</trk>\n" );
734 static void gpx_write_header( FILE *f )
736 fprintf(f, "<?xml version=\"1.0\"?>\n"
737 "<gpx version=\"1.0\" creator=\"Viking -- http://viking.sf.net/\"\n"
738 "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
739 "xmlns=\"http://www.topografix.com/GPX/1/0\"\n"
740 "xsi:schemaLocation=\"http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd\">\n");
743 static void gpx_write_footer( FILE *f )
745 fprintf(f, "</gpx>\n");
753 } gpx_waypoint_and_name;
756 gpx_waypoint_and_name *wps;
759 } gpx_gather_waypoints_passalong_t;
761 static void gpx_collect_waypoint ( const gchar *name, VikWaypoint *wp, gpx_gather_waypoints_passalong_t *passalong )
763 if ( passalong->i < passalong->n_wps ) {
764 passalong->wps[passalong->i].name = name;
765 passalong->wps[passalong->i].wp = wp;
770 static int gpx_waypoint_and_name_compar(const void *x, const void *y)
772 gpx_waypoint_and_name *a = (gpx_waypoint_and_name *)x;
773 gpx_waypoint_and_name *b = (gpx_waypoint_and_name *)y;
774 return strcmp(a->name,b->name);
777 void a_gpx_write_file( VikTrwLayer *vtl, FILE *f )
779 a_gpx_write_file_options(NULL, vtl, f);
782 void a_gpx_write_file_options ( GpxWritingOptions *options, VikTrwLayer *vtl, FILE *f )
784 GpxWritingContext context = { options, f };
787 gpx_write_header ( f );
790 gpx_gather_waypoints_passalong_t passalong;
791 passalong.n_wps = g_hash_table_size ( vik_trw_layer_get_waypoints ( vtl ) );
793 passalong.wps = g_new(gpx_waypoint_and_name,passalong.n_wps);
794 g_hash_table_foreach ( vik_trw_layer_get_waypoints ( vtl ), (GHFunc) gpx_collect_waypoint, &passalong );
795 /* gather waypoints in a list, then sort */
796 qsort(passalong.wps, passalong.n_wps, sizeof(gpx_waypoint_and_name), gpx_waypoint_and_name_compar);
797 for ( i = 0; i < passalong.n_wps; i++ )
798 gpx_write_waypoint ( passalong.wps[i].name, passalong.wps[i].wp, &context);
799 g_free ( passalong.wps );
801 g_hash_table_foreach ( vik_trw_layer_get_tracks ( vtl ), (GHFunc) gpx_write_track, &context );
803 gpx_write_footer ( f );
806 void a_gpx_write_track_file ( const gchar *name, VikTrack *t, FILE *f )
808 a_gpx_write_track_file_options ( NULL, name, t, f );
811 void a_gpx_write_track_file_options ( GpxWritingOptions *options, const gchar *name, VikTrack *t, FILE *f )
813 GpxWritingContext context = {options, f};
814 gpx_write_header ( f );
815 gpx_write_track ( name, t, &context );
816 gpx_write_footer ( f );