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1 | /* | |
2 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
3 | * | |
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> | |
9 | * | |
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 | |
13 | * | |
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. | |
18 | * | |
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. | |
23 | * | |
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 | |
27 | * | |
28 | */ | |
29 | #ifdef HAVE_CONFIG_H | |
30 | #include "config.h" | |
31 | #endif | |
32 | ||
33 | #define _XOPEN_SOURCE /* glibc2 needs this */ | |
34 | ||
35 | #include "gpx.h" | |
36 | #include "viking.h" | |
37 | #include <expat.h> | |
38 | #ifdef HAVE_STRING_H | |
39 | #include <string.h> | |
40 | #endif | |
41 | #include <glib.h> | |
42 | #ifdef HAVE_MATH_H | |
43 | #include <math.h> | |
44 | #endif | |
45 | #include <time.h> | |
46 | ||
47 | typedef enum { | |
48 | tt_unknown = 0, | |
49 | ||
50 | tt_gpx, | |
51 | ||
52 | tt_wpt, | |
53 | tt_wpt_cmt, | |
54 | tt_wpt_desc, | |
55 | tt_wpt_name, | |
56 | tt_wpt_ele, | |
57 | tt_wpt_sym, | |
58 | tt_wpt_link, /* New in GPX 1.1 */ | |
59 | ||
60 | tt_trk, | |
61 | tt_trk_cmt, | |
62 | tt_trk_desc, | |
63 | tt_trk_name, | |
64 | ||
65 | tt_rte, | |
66 | ||
67 | tt_trk_trkseg, | |
68 | tt_trk_trkseg_trkpt, | |
69 | tt_trk_trkseg_trkpt_ele, | |
70 | tt_trk_trkseg_trkpt_time, | |
71 | /* extended */ | |
72 | tt_trk_trkseg_trkpt_course, | |
73 | tt_trk_trkseg_trkpt_speed, | |
74 | tt_trk_trkseg_trkpt_fix, | |
75 | tt_trk_trkseg_trkpt_sat, | |
76 | ||
77 | tt_trk_trkseg_trkpt_hdop, | |
78 | tt_trk_trkseg_trkpt_vdop, | |
79 | tt_trk_trkseg_trkpt_pdop, | |
80 | ||
81 | tt_waypoint, | |
82 | tt_waypoint_coord, | |
83 | tt_waypoint_name, | |
84 | } tag_type; | |
85 | ||
86 | typedef struct tag_mapping { | |
87 | tag_type tag_type; /* enum from above for this tag */ | |
88 | const char *tag_name; /* xpath-ish tag name */ | |
89 | } tag_mapping; | |
90 | ||
91 | typedef struct { | |
92 | GpxWritingOptions *options; | |
93 | FILE *file; | |
94 | } GpxWritingContext; | |
95 | ||
96 | /* | |
97 | * xpath(ish) mappings between full tag paths and internal identifers. | |
98 | * These appear in the order they appear in the GPX specification. | |
99 | * If it's not a tag we explictly handle, it doesn't go here. | |
100 | */ | |
101 | ||
102 | tag_mapping tag_path_map[] = { | |
103 | ||
104 | { tt_wpt, "/gpx/wpt" }, | |
105 | ||
106 | { tt_waypoint, "/loc/waypoint" }, | |
107 | { tt_waypoint_coord, "/loc/waypoint/coord" }, | |
108 | { tt_waypoint_name, "/loc/waypoint/name" }, | |
109 | ||
110 | { tt_wpt_ele, "/gpx/wpt/ele" }, | |
111 | { tt_wpt_name, "/gpx/wpt/name" }, | |
112 | { tt_wpt_cmt, "/gpx/wpt/cmt" }, | |
113 | { tt_wpt_desc, "/gpx/wpt/desc" }, | |
114 | { tt_wpt_sym, "/gpx/wpt/sym" }, | |
115 | { tt_wpt_sym, "/loc/waypoint/type" }, | |
116 | { tt_wpt_link, "/gpx/wpt/link" }, /* GPX 1.1 */ | |
117 | ||
118 | { tt_trk, "/gpx/trk" }, | |
119 | { tt_trk_name, "/gpx/trk/name" }, | |
120 | { tt_trk_cmt, "/gpx/trk/cmt" }, | |
121 | { tt_trk_desc, "/gpx/trk/desc" }, | |
122 | { tt_trk_trkseg, "/gpx/trk/trkseg" }, | |
123 | { tt_trk_trkseg_trkpt, "/gpx/trk/trkseg/trkpt" }, | |
124 | { tt_trk_trkseg_trkpt_ele, "/gpx/trk/trkseg/trkpt/ele" }, | |
125 | { tt_trk_trkseg_trkpt_time, "/gpx/trk/trkseg/trkpt/time" }, | |
126 | /* extended */ | |
127 | { tt_trk_trkseg_trkpt_course, "/gpx/trk/trkseg/trkpt/course" }, | |
128 | { tt_trk_trkseg_trkpt_speed, "/gpx/trk/trkseg/trkpt/speed" }, | |
129 | { tt_trk_trkseg_trkpt_fix, "/gpx/trk/trkseg/trkpt/fix" }, | |
130 | { tt_trk_trkseg_trkpt_sat, "/gpx/trk/trkseg/trkpt/sat" }, | |
131 | ||
132 | { tt_trk_trkseg_trkpt_hdop, "/gpx/trk/trkseg/trkpt/hdop" }, | |
133 | { tt_trk_trkseg_trkpt_vdop, "/gpx/trk/trkseg/trkpt/vdop" }, | |
134 | { tt_trk_trkseg_trkpt_pdop, "/gpx/trk/trkseg/trkpt/pdop" }, | |
135 | ||
136 | { tt_rte, "/gpx/rte" }, | |
137 | // NB Route reuses track point feature tags | |
138 | { tt_trk_name, "/gpx/rte/name" }, | |
139 | { tt_trk_cmt, "/gpx/rte/cmt" }, | |
140 | { tt_trk_desc, "/gpx/rte/desc" }, | |
141 | { tt_trk_trkseg_trkpt, "/gpx/rte/rtept" }, | |
142 | { tt_trk_trkseg_trkpt_ele, "/gpx/rte/rtept/ele" }, | |
143 | ||
144 | {0} | |
145 | }; | |
146 | ||
147 | static tag_type get_tag(const char *t) | |
148 | { | |
149 | tag_mapping *tm; | |
150 | for (tm = tag_path_map; tm->tag_type != 0; tm++) | |
151 | if (0 == strcmp(tm->tag_name, t)) | |
152 | return tm->tag_type; | |
153 | return tt_unknown; | |
154 | } | |
155 | ||
156 | /******************************************/ | |
157 | ||
158 | tag_type current_tag = tt_unknown; | |
159 | GString *xpath = NULL; | |
160 | GString *c_cdata = NULL; | |
161 | ||
162 | /* current ("c_") objects */ | |
163 | VikTrackpoint *c_tp = NULL; | |
164 | VikWaypoint *c_wp = NULL; | |
165 | VikTrack *c_tr = NULL; | |
166 | ||
167 | gchar *c_wp_name = NULL; | |
168 | gchar *c_tr_name = NULL; | |
169 | ||
170 | /* temporary things so we don't have to create them lots of times */ | |
171 | const gchar *c_slat, *c_slon; | |
172 | struct LatLon c_ll; | |
173 | ||
174 | /* specialty flags / etc */ | |
175 | gboolean f_tr_newseg; | |
176 | guint unnamed_waypoints = 0; | |
177 | guint unnamed_tracks = 0; | |
178 | ||
179 | ||
180 | static const char *get_attr ( const char **attr, const char *key ) | |
181 | { | |
182 | while ( *attr ) { | |
183 | if ( strcmp(*attr,key) == 0 ) | |
184 | return *(attr + 1); | |
185 | attr += 2; | |
186 | } | |
187 | return NULL; | |
188 | } | |
189 | ||
190 | static gboolean set_c_ll ( const char **attr ) | |
191 | { | |
192 | if ( (c_slat = get_attr ( attr, "lat" )) && (c_slon = get_attr ( attr, "lon" )) ) { | |
193 | c_ll.lat = g_ascii_strtod(c_slat, NULL); | |
194 | c_ll.lon = g_ascii_strtod(c_slon, NULL); | |
195 | return TRUE; | |
196 | } | |
197 | return FALSE; | |
198 | } | |
199 | ||
200 | static void gpx_start(VikTrwLayer *vtl, const char *el, const char **attr) | |
201 | { | |
202 | static const gchar *tmp; | |
203 | ||
204 | g_string_append_c ( xpath, '/' ); | |
205 | g_string_append ( xpath, el ); | |
206 | current_tag = get_tag ( xpath->str ); | |
207 | ||
208 | switch ( current_tag ) { | |
209 | ||
210 | case tt_wpt: | |
211 | if ( set_c_ll( attr ) ) { | |
212 | c_wp = vik_waypoint_new (); | |
213 | c_wp->visible = TRUE; | |
214 | if ( get_attr ( attr, "hidden" ) ) | |
215 | c_wp->visible = FALSE; | |
216 | ||
217 | vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll ); | |
218 | } | |
219 | break; | |
220 | ||
221 | case tt_trk: | |
222 | case tt_rte: | |
223 | c_tr = vik_track_new (); | |
224 | c_tr->is_route = (current_tag == tt_rte) ? TRUE : FALSE; | |
225 | c_tr->visible = TRUE; | |
226 | if ( get_attr ( attr, "hidden" ) ) | |
227 | c_tr->visible = FALSE; | |
228 | break; | |
229 | ||
230 | case tt_trk_trkseg: | |
231 | f_tr_newseg = TRUE; | |
232 | break; | |
233 | ||
234 | case tt_trk_trkseg_trkpt: | |
235 | if ( set_c_ll( attr ) ) { | |
236 | c_tp = vik_trackpoint_new (); | |
237 | vik_coord_load_from_latlon ( &(c_tp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll ); | |
238 | if ( f_tr_newseg ) { | |
239 | c_tp->newsegment = TRUE; | |
240 | f_tr_newseg = FALSE; | |
241 | } | |
242 | c_tr->trackpoints = g_list_append ( c_tr->trackpoints, c_tp ); | |
243 | } | |
244 | break; | |
245 | ||
246 | case tt_trk_trkseg_trkpt_ele: | |
247 | case tt_trk_trkseg_trkpt_time: | |
248 | case tt_wpt_cmt: | |
249 | case tt_wpt_desc: | |
250 | case tt_wpt_name: | |
251 | case tt_wpt_ele: | |
252 | case tt_wpt_link: | |
253 | case tt_trk_cmt: | |
254 | case tt_trk_desc: | |
255 | case tt_trk_name: | |
256 | g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer */ | |
257 | break; | |
258 | ||
259 | case tt_waypoint: | |
260 | c_wp = vik_waypoint_new (); | |
261 | c_wp->visible = TRUE; | |
262 | break; | |
263 | ||
264 | case tt_waypoint_coord: | |
265 | if ( set_c_ll( attr ) ) | |
266 | vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll ); | |
267 | break; | |
268 | ||
269 | case tt_waypoint_name: | |
270 | if ( ( tmp = get_attr(attr, "id") ) ) { | |
271 | if ( c_wp_name ) | |
272 | g_free ( c_wp_name ); | |
273 | c_wp_name = g_strdup ( tmp ); | |
274 | } | |
275 | g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer for description */ | |
276 | break; | |
277 | ||
278 | default: break; | |
279 | } | |
280 | } | |
281 | ||
282 | static void gpx_end(VikTrwLayer *vtl, const char *el) | |
283 | { | |
284 | static GTimeVal tp_time; | |
285 | ||
286 | g_string_truncate ( xpath, xpath->len - strlen(el) - 1 ); | |
287 | ||
288 | switch ( current_tag ) { | |
289 | ||
290 | case tt_waypoint: | |
291 | case tt_wpt: | |
292 | if ( ! c_wp_name ) | |
293 | c_wp_name = g_strdup_printf("VIKING_WP%d", unnamed_waypoints++); | |
294 | vik_trw_layer_filein_add_waypoint ( vtl, c_wp_name, c_wp ); | |
295 | g_free ( c_wp_name ); | |
296 | c_wp = NULL; | |
297 | c_wp_name = NULL; | |
298 | break; | |
299 | ||
300 | case tt_trk: | |
301 | case tt_rte: | |
302 | if ( ! c_tr_name ) | |
303 | c_tr_name = g_strdup_printf("VIKING_TR%d", unnamed_tracks++); | |
304 | vik_trw_layer_filein_add_track ( vtl, c_tr_name, c_tr ); | |
305 | g_free ( c_tr_name ); | |
306 | c_tr = NULL; | |
307 | c_tr_name = NULL; | |
308 | break; | |
309 | ||
310 | case tt_wpt_name: | |
311 | if ( c_wp_name ) | |
312 | g_free ( c_wp_name ); | |
313 | c_wp_name = g_strdup ( c_cdata->str ); | |
314 | g_string_erase ( c_cdata, 0, -1 ); | |
315 | break; | |
316 | ||
317 | case tt_trk_name: | |
318 | if ( c_tr_name ) | |
319 | g_free ( c_tr_name ); | |
320 | c_tr_name = g_strdup ( c_cdata->str ); | |
321 | g_string_erase ( c_cdata, 0, -1 ); | |
322 | break; | |
323 | ||
324 | case tt_wpt_ele: | |
325 | c_wp->altitude = g_ascii_strtod ( c_cdata->str, NULL ); | |
326 | g_string_erase ( c_cdata, 0, -1 ); | |
327 | break; | |
328 | ||
329 | case tt_trk_trkseg_trkpt_ele: | |
330 | c_tp->altitude = g_ascii_strtod ( c_cdata->str, NULL ); | |
331 | g_string_erase ( c_cdata, 0, -1 ); | |
332 | break; | |
333 | ||
334 | case tt_waypoint_name: /* .loc name is really description. */ | |
335 | case tt_wpt_desc: | |
336 | vik_waypoint_set_description ( c_wp, c_cdata->str ); | |
337 | g_string_erase ( c_cdata, 0, -1 ); | |
338 | break; | |
339 | ||
340 | case tt_wpt_cmt: | |
341 | vik_waypoint_set_comment ( c_wp, c_cdata->str ); | |
342 | g_string_erase ( c_cdata, 0, -1 ); | |
343 | break; | |
344 | ||
345 | case tt_wpt_link: | |
346 | vik_waypoint_set_image ( c_wp, c_cdata->str ); | |
347 | g_string_erase ( c_cdata, 0, -1 ); | |
348 | break; | |
349 | ||
350 | case tt_wpt_sym: { | |
351 | gchar *tmp_lower = g_utf8_strdown(c_cdata->str, -1); /* for things like <type>Geocache</type> */ | |
352 | vik_waypoint_set_symbol ( c_wp, tmp_lower ); | |
353 | g_free ( tmp_lower ); | |
354 | g_string_erase ( c_cdata, 0, -1 ); | |
355 | break; | |
356 | } | |
357 | ||
358 | case tt_trk_desc: | |
359 | vik_track_set_description ( c_tr, c_cdata->str ); | |
360 | g_string_erase ( c_cdata, 0, -1 ); | |
361 | break; | |
362 | ||
363 | case tt_trk_cmt: | |
364 | vik_track_set_comment ( c_tr, c_cdata->str ); | |
365 | g_string_erase ( c_cdata, 0, -1 ); | |
366 | break; | |
367 | ||
368 | case tt_trk_trkseg_trkpt_time: | |
369 | if ( g_time_val_from_iso8601(c_cdata->str, &tp_time) ) { | |
370 | c_tp->timestamp = tp_time.tv_sec; | |
371 | c_tp->has_timestamp = TRUE; | |
372 | } | |
373 | g_string_erase ( c_cdata, 0, -1 ); | |
374 | break; | |
375 | ||
376 | case tt_trk_trkseg_trkpt_course: | |
377 | c_tp->course = g_ascii_strtod ( c_cdata->str, NULL ); | |
378 | g_string_erase ( c_cdata, 0, -1 ); | |
379 | break; | |
380 | ||
381 | case tt_trk_trkseg_trkpt_speed: | |
382 | c_tp->speed = g_ascii_strtod ( c_cdata->str, NULL ); | |
383 | g_string_erase ( c_cdata, 0, -1 ); | |
384 | break; | |
385 | ||
386 | case tt_trk_trkseg_trkpt_fix: | |
387 | if (!strcmp("2d", c_cdata->str)) | |
388 | c_tp->fix_mode = VIK_GPS_MODE_2D; | |
389 | else if (!strcmp("3d", c_cdata->str)) | |
390 | c_tp->fix_mode = VIK_GPS_MODE_3D; | |
391 | else /* TODO: more fix modes here */ | |
392 | c_tp->fix_mode = VIK_GPS_MODE_NOT_SEEN; | |
393 | g_string_erase ( c_cdata, 0, -1 ); | |
394 | break; | |
395 | ||
396 | case tt_trk_trkseg_trkpt_sat: | |
397 | c_tp->nsats = atoi ( c_cdata->str ); | |
398 | g_string_erase ( c_cdata, 0, -1 ); | |
399 | break; | |
400 | ||
401 | case tt_trk_trkseg_trkpt_hdop: | |
402 | c_tp->hdop = g_strtod ( c_cdata->str, NULL ); | |
403 | g_string_erase ( c_cdata, 0, -1 ); | |
404 | break; | |
405 | ||
406 | case tt_trk_trkseg_trkpt_vdop: | |
407 | c_tp->vdop = g_strtod ( c_cdata->str, NULL ); | |
408 | g_string_erase ( c_cdata, 0, -1 ); | |
409 | break; | |
410 | ||
411 | case tt_trk_trkseg_trkpt_pdop: | |
412 | c_tp->pdop = g_strtod ( c_cdata->str, NULL ); | |
413 | g_string_erase ( c_cdata, 0, -1 ); | |
414 | break; | |
415 | ||
416 | default: break; | |
417 | } | |
418 | ||
419 | current_tag = get_tag ( xpath->str ); | |
420 | } | |
421 | ||
422 | static void gpx_cdata(void *dta, const XML_Char *s, int len) | |
423 | { | |
424 | switch ( current_tag ) { | |
425 | case tt_wpt_name: | |
426 | case tt_trk_name: | |
427 | case tt_wpt_ele: | |
428 | case tt_trk_trkseg_trkpt_ele: | |
429 | case tt_wpt_cmt: | |
430 | case tt_wpt_desc: | |
431 | case tt_wpt_sym: | |
432 | case tt_wpt_link: | |
433 | case tt_trk_cmt: | |
434 | case tt_trk_desc: | |
435 | case tt_trk_trkseg_trkpt_time: | |
436 | case tt_trk_trkseg_trkpt_course: | |
437 | case tt_trk_trkseg_trkpt_speed: | |
438 | case tt_trk_trkseg_trkpt_fix: | |
439 | case tt_trk_trkseg_trkpt_sat: | |
440 | case tt_trk_trkseg_trkpt_hdop: | |
441 | case tt_trk_trkseg_trkpt_vdop: | |
442 | case tt_trk_trkseg_trkpt_pdop: | |
443 | case tt_waypoint_name: /* .loc name is really description. */ | |
444 | g_string_append_len ( c_cdata, s, len ); | |
445 | break; | |
446 | ||
447 | default: break; /* ignore cdata from other things */ | |
448 | } | |
449 | } | |
450 | ||
451 | // make like a "stack" of tag names | |
452 | // like gpspoint's separated like /gpx/wpt/whatever | |
453 | ||
454 | gboolean a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) { | |
455 | XML_Parser parser = XML_ParserCreate(NULL); | |
456 | int done=0, len; | |
457 | enum XML_Status status = XML_STATUS_ERROR; | |
458 | ||
459 | XML_SetElementHandler(parser, (XML_StartElementHandler) gpx_start, (XML_EndElementHandler) gpx_end); | |
460 | XML_SetUserData(parser, vtl); /* in the future we could remove all global variables */ | |
461 | XML_SetCharacterDataHandler(parser, (XML_CharacterDataHandler) gpx_cdata); | |
462 | ||
463 | gchar buf[4096]; | |
464 | ||
465 | g_assert ( f != NULL && vtl != NULL ); | |
466 | ||
467 | xpath = g_string_new ( "" ); | |
468 | c_cdata = g_string_new ( "" ); | |
469 | ||
470 | unnamed_waypoints = 0; | |
471 | unnamed_tracks = 0; | |
472 | ||
473 | while (!done) { | |
474 | len = fread(buf, 1, sizeof(buf)-7, f); | |
475 | done = feof(f) || !len; | |
476 | status = XML_Parse(parser, buf, len, done); | |
477 | } | |
478 | ||
479 | XML_ParserFree (parser); | |
480 | g_string_free ( xpath, TRUE ); | |
481 | g_string_free ( c_cdata, TRUE ); | |
482 | ||
483 | return status != XML_STATUS_ERROR; | |
484 | } | |
485 | ||
486 | /**** entitize from GPSBabel ****/ | |
487 | typedef struct { | |
488 | const char * text; | |
489 | const char * entity; | |
490 | int not_html; | |
491 | } entity_types; | |
492 | ||
493 | static | |
494 | entity_types stdentities[] = { | |
495 | { "&", "&", 0 }, | |
496 | { "'", "'", 1 }, | |
497 | { "<", "<", 0 }, | |
498 | { ">", ">", 0 }, | |
499 | { "\"", """, 0 }, | |
500 | { NULL, NULL, 0 } | |
501 | }; | |
502 | ||
503 | void utf8_to_int( const char *cp, int *bytes, int *value ) | |
504 | { | |
505 | if ( (*cp & 0xe0) == 0xc0 ) { | |
506 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
507 | *bytes = 2; | |
508 | *value = ((*cp & 0x1f) << 6) | | |
509 | (*(cp+1) & 0x3f); | |
510 | } | |
511 | else if ( (*cp & 0xf0) == 0xe0 ) { | |
512 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
513 | if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault; | |
514 | *bytes = 3; | |
515 | *value = ((*cp & 0x0f) << 12) | | |
516 | ((*(cp+1) & 0x3f) << 6) | | |
517 | (*(cp+2) & 0x3f); | |
518 | } | |
519 | else if ( (*cp & 0xf8) == 0xf0 ) { | |
520 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
521 | if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault; | |
522 | if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault; | |
523 | *bytes = 4; | |
524 | *value = ((*cp & 0x07) << 18) | | |
525 | ((*(cp+1) & 0x3f) << 12) | | |
526 | ((*(cp+2) & 0x3f) << 6) | | |
527 | (*(cp+3) & 0x3f); | |
528 | } | |
529 | else if ( (*cp & 0xfc) == 0xf8 ) { | |
530 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
531 | if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault; | |
532 | if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault; | |
533 | if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault; | |
534 | *bytes = 5; | |
535 | *value = ((*cp & 0x03) << 24) | | |
536 | ((*(cp+1) & 0x3f) << 18) | | |
537 | ((*(cp+2) & 0x3f) << 12) | | |
538 | ((*(cp+3) & 0x3f) << 6) | | |
539 | (*(cp+4) & 0x3f); | |
540 | } | |
541 | else if ( (*cp & 0xfe) == 0xfc ) { | |
542 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
543 | if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault; | |
544 | if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault; | |
545 | if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault; | |
546 | if ( (*(cp+5) & 0xc0) != 0x80 ) goto dodefault; | |
547 | *bytes = 6; | |
548 | *value = ((*cp & 0x01) << 30) | | |
549 | ((*(cp+1) & 0x3f) << 24) | | |
550 | ((*(cp+2) & 0x3f) << 18) | | |
551 | ((*(cp+3) & 0x3f) << 12) | | |
552 | ((*(cp+4) & 0x3f) << 6) | | |
553 | (*(cp+5) & 0x3f); | |
554 | } | |
555 | else { | |
556 | dodefault: | |
557 | *bytes = 1; | |
558 | *value = (unsigned char)*cp; | |
559 | } | |
560 | } | |
561 | ||
562 | static | |
563 | char * | |
564 | entitize(const char * str) | |
565 | { | |
566 | int elen, ecount, nsecount; | |
567 | entity_types *ep; | |
568 | const char * cp; | |
569 | char * p, * tmp, * xstr; | |
570 | ||
571 | char tmpsub[20]; | |
572 | int bytes = 0; | |
573 | int value = 0; | |
574 | ep = stdentities; | |
575 | elen = ecount = nsecount = 0; | |
576 | ||
577 | /* figure # of entity replacements and additional size. */ | |
578 | while (ep->text) { | |
579 | cp = str; | |
580 | while ((cp = strstr(cp, ep->text)) != NULL) { | |
581 | elen += strlen(ep->entity) - strlen(ep->text); | |
582 | ecount++; | |
583 | cp += strlen(ep->text); | |
584 | } | |
585 | ep++; | |
586 | } | |
587 | ||
588 | /* figure the same for other than standard entities (i.e. anything | |
589 | * that isn't in the range U+0000 to U+007F */ | |
590 | for ( cp = str; *cp; cp++ ) { | |
591 | if ( *cp & 0x80 ) { | |
592 | ||
593 | utf8_to_int( cp, &bytes, &value ); | |
594 | cp += bytes-1; | |
595 | elen += sprintf( tmpsub, "&#x%x;", value ) - bytes; | |
596 | nsecount++; | |
597 | } | |
598 | } | |
599 | ||
600 | /* enough space for the whole string plus entity replacements, if any */ | |
601 | tmp = g_malloc((strlen(str) + elen + 1)); | |
602 | strcpy(tmp, str); | |
603 | ||
604 | /* no entity replacements */ | |
605 | if (ecount == 0 && nsecount == 0) | |
606 | return (tmp); | |
607 | ||
608 | if ( ecount != 0 ) { | |
609 | for (ep = stdentities; ep->text; ep++) { | |
610 | p = tmp; | |
611 | while ((p = strstr(p, ep->text)) != NULL) { | |
612 | elen = strlen(ep->entity); | |
613 | ||
614 | xstr = g_strdup(p + strlen(ep->text)); | |
615 | ||
616 | strcpy(p, ep->entity); | |
617 | strcpy(p + elen, xstr); | |
618 | ||
619 | g_free(xstr); | |
620 | ||
621 | p += elen; | |
622 | } | |
623 | } | |
624 | } | |
625 | ||
626 | if ( nsecount != 0 ) { | |
627 | p = tmp; | |
628 | while (*p) { | |
629 | if ( *p & 0x80 ) { | |
630 | utf8_to_int( p, &bytes, &value ); | |
631 | if ( p[bytes] ) { | |
632 | xstr = g_strdup( p + bytes ); | |
633 | } | |
634 | else { | |
635 | xstr = NULL; | |
636 | } | |
637 | sprintf( p, "&#x%x;", value ); | |
638 | p = p+strlen(p); | |
639 | if ( xstr ) { | |
640 | strcpy( p, xstr ); | |
641 | g_free(xstr); | |
642 | } | |
643 | } | |
644 | else { | |
645 | p++; | |
646 | } | |
647 | } | |
648 | } | |
649 | return (tmp); | |
650 | } | |
651 | /**** end GPSBabel code ****/ | |
652 | ||
653 | /* export GPX */ | |
654 | ||
655 | static void gpx_write_waypoint ( VikWaypoint *wp, GpxWritingContext *context ) | |
656 | { | |
657 | // Don't write invisible waypoints when specified | |
658 | if (context->options && !context->options->hidden && !wp->visible) | |
659 | return; | |
660 | ||
661 | FILE *f = context->file; | |
662 | static struct LatLon ll; | |
663 | gchar *s_lat,*s_lon; | |
664 | gchar *tmp; | |
665 | vik_coord_to_latlon ( &(wp->coord), &ll ); | |
666 | s_lat = a_coords_dtostr( ll.lat ); | |
667 | s_lon = a_coords_dtostr( ll.lon ); | |
668 | // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension' | |
669 | // luckily most other GPX processing software ignores things they don't understand | |
670 | fprintf ( f, "<wpt lat=\"%s\" lon=\"%s\"%s>\n", | |
671 | s_lat, s_lon, wp->visible ? "" : " hidden=\"hidden\"" ); | |
672 | g_free ( s_lat ); | |
673 | g_free ( s_lon ); | |
674 | ||
675 | // Sanity clause | |
676 | if ( wp->name ) | |
677 | tmp = entitize ( wp->name ); | |
678 | else | |
679 | tmp = g_strdup ("waypoint"); | |
680 | ||
681 | fprintf ( f, " <name>%s</name>\n", tmp ); | |
682 | g_free ( tmp); | |
683 | ||
684 | if ( wp->altitude != VIK_DEFAULT_ALTITUDE ) | |
685 | { | |
686 | tmp = a_coords_dtostr ( wp->altitude ); | |
687 | fprintf ( f, " <ele>%s</ele>\n", tmp ); | |
688 | g_free ( tmp ); | |
689 | } | |
690 | if ( wp->comment ) | |
691 | { | |
692 | tmp = entitize(wp->comment); | |
693 | fprintf ( f, " <cmt>%s</cmt>\n", tmp ); | |
694 | g_free ( tmp ); | |
695 | } | |
696 | if ( wp->description ) | |
697 | { | |
698 | tmp = entitize(wp->description); | |
699 | fprintf ( f, " <desc>%s</desc>\n", tmp ); | |
700 | g_free ( tmp ); | |
701 | } | |
702 | if ( wp->image ) | |
703 | { | |
704 | tmp = entitize(wp->image); | |
705 | fprintf ( f, " <link>%s</link>\n", tmp ); | |
706 | g_free ( tmp ); | |
707 | } | |
708 | if ( wp->symbol ) | |
709 | { | |
710 | tmp = entitize(wp->symbol); | |
711 | fprintf ( f, " <sym>%s</sym>\n", tmp); | |
712 | g_free ( tmp ); | |
713 | } | |
714 | ||
715 | fprintf ( f, "</wpt>\n" ); | |
716 | } | |
717 | ||
718 | static void gpx_write_trackpoint ( VikTrackpoint *tp, GpxWritingContext *context ) | |
719 | { | |
720 | FILE *f = context->file; | |
721 | static struct LatLon ll; | |
722 | gchar *s_lat,*s_lon, *s_alt, *s_dop; | |
723 | gchar *time_iso8601; | |
724 | vik_coord_to_latlon ( &(tp->coord), &ll ); | |
725 | ||
726 | // No such thing as a rteseg! So make sure we don't put them in | |
727 | if ( context->options && !context->options->is_route && tp->newsegment ) | |
728 | fprintf ( f, " </trkseg>\n <trkseg>\n" ); | |
729 | ||
730 | s_lat = a_coords_dtostr( ll.lat ); | |
731 | s_lon = a_coords_dtostr( ll.lon ); | |
732 | fprintf ( f, " <%spt lat=\"%s\" lon=\"%s\">\n", (context->options && context->options->is_route) ? "rte" : "trk", s_lat, s_lon ); | |
733 | g_free ( s_lat ); s_lat = NULL; | |
734 | g_free ( s_lon ); s_lon = NULL; | |
735 | ||
736 | s_alt = NULL; | |
737 | if ( tp->altitude != VIK_DEFAULT_ALTITUDE ) | |
738 | { | |
739 | s_alt = a_coords_dtostr ( tp->altitude ); | |
740 | } | |
741 | else if ( context->options != NULL && context->options->force_ele ) | |
742 | { | |
743 | s_alt = a_coords_dtostr ( 0 ); | |
744 | } | |
745 | if (s_alt != NULL) | |
746 | fprintf ( f, " <ele>%s</ele>\n", s_alt ); | |
747 | g_free ( s_alt ); s_alt = NULL; | |
748 | ||
749 | time_iso8601 = NULL; | |
750 | if ( tp->has_timestamp ) { | |
751 | GTimeVal timestamp; | |
752 | timestamp.tv_sec = tp->timestamp; | |
753 | timestamp.tv_usec = 0; | |
754 | ||
755 | time_iso8601 = g_time_val_to_iso8601 ( ×tamp ); | |
756 | } | |
757 | else if ( context->options != NULL && context->options->force_time ) | |
758 | { | |
759 | GTimeVal current; | |
760 | g_get_current_time ( ¤t ); | |
761 | ||
762 | time_iso8601 = g_time_val_to_iso8601 ( ¤t ); | |
763 | } | |
764 | if ( time_iso8601 != NULL ) | |
765 | fprintf ( f, " <time>%s</time>\n", time_iso8601 ); | |
766 | g_free(time_iso8601); | |
767 | time_iso8601 = NULL; | |
768 | ||
769 | if (!isnan(tp->course)) { | |
770 | gchar *s_course = a_coords_dtostr(tp->course); | |
771 | fprintf ( f, " <course>%s</course>\n", s_course ); | |
772 | g_free(s_course); | |
773 | } | |
774 | if (!isnan(tp->speed)) { | |
775 | gchar *s_speed = a_coords_dtostr(tp->speed); | |
776 | fprintf ( f, " <speed>%s</speed>\n", s_speed ); | |
777 | g_free(s_speed); | |
778 | } | |
779 | if (tp->fix_mode == VIK_GPS_MODE_2D) | |
780 | fprintf ( f, " <fix>2d</fix>\n"); | |
781 | if (tp->fix_mode == VIK_GPS_MODE_3D) | |
782 | fprintf ( f, " <fix>3d</fix>\n"); | |
783 | if (tp->nsats > 0) | |
784 | fprintf ( f, " <sat>%d</sat>\n", tp->nsats ); | |
785 | ||
786 | s_dop = NULL; | |
787 | if ( tp->hdop != VIK_DEFAULT_DOP ) | |
788 | { | |
789 | s_dop = a_coords_dtostr ( tp->hdop ); | |
790 | } | |
791 | if (s_dop != NULL) | |
792 | fprintf ( f, " <hdop>%s</hdop>\n", s_dop ); | |
793 | g_free ( s_dop ); s_dop = NULL; | |
794 | ||
795 | if ( tp->vdop != VIK_DEFAULT_DOP ) | |
796 | { | |
797 | s_dop = a_coords_dtostr ( tp->vdop ); | |
798 | } | |
799 | if (s_dop != NULL) | |
800 | fprintf ( f, " <vdop>%s</vdop>\n", s_dop ); | |
801 | g_free ( s_dop ); s_dop = NULL; | |
802 | ||
803 | if ( tp->pdop != VIK_DEFAULT_DOP ) | |
804 | { | |
805 | s_dop = a_coords_dtostr ( tp->pdop ); | |
806 | } | |
807 | if (s_dop != NULL) | |
808 | fprintf ( f, " <pdop>%s</pdop>\n", s_dop ); | |
809 | g_free ( s_dop ); s_dop = NULL; | |
810 | ||
811 | fprintf ( f, " </%spt>\n", (context->options && context->options->is_route) ? "rte" : "trk" ); | |
812 | } | |
813 | ||
814 | ||
815 | static void gpx_write_track ( VikTrack *t, GpxWritingContext *context ) | |
816 | { | |
817 | // Don't write invisible tracks when specified | |
818 | if (context->options && !context->options->hidden && !t->visible) | |
819 | return; | |
820 | ||
821 | FILE *f = context->file; | |
822 | gchar *tmp; | |
823 | gboolean first_tp_is_newsegment = FALSE; /* must temporarily make it not so, but we want to restore state. not that it matters. */ | |
824 | ||
825 | // Sanity clause | |
826 | if ( t->name ) | |
827 | tmp = entitize ( t->name ); | |
828 | else | |
829 | tmp = g_strdup ("track"); | |
830 | ||
831 | // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension' | |
832 | // luckily most other GPX processing software ignores things they don't understand | |
833 | fprintf ( f, "<%s%s>\n <name>%s</name>\n", | |
834 | t->is_route ? "rte" : "trk", | |
835 | t->visible ? "" : " hidden=\"hidden\"", | |
836 | tmp ); | |
837 | g_free ( tmp ); | |
838 | ||
839 | if ( t->comment ) | |
840 | { | |
841 | tmp = entitize ( t->comment ); | |
842 | fprintf ( f, " <cmt>%s</cmt>\n", tmp ); | |
843 | g_free ( tmp ); | |
844 | } | |
845 | ||
846 | if ( t->description ) | |
847 | { | |
848 | tmp = entitize ( t->description ); | |
849 | fprintf ( f, " <desc>%s</desc>\n", tmp ); | |
850 | g_free ( tmp ); | |
851 | } | |
852 | ||
853 | /* No such thing as a rteseg! */ | |
854 | if ( !t->is_route ) | |
855 | fprintf ( f, " <trkseg>\n" ); | |
856 | ||
857 | if ( t->trackpoints && t->trackpoints->data ) { | |
858 | first_tp_is_newsegment = VIK_TRACKPOINT(t->trackpoints->data)->newsegment; | |
859 | VIK_TRACKPOINT(t->trackpoints->data)->newsegment = FALSE; /* so we won't write </trkseg><trkseg> already */ | |
860 | g_list_foreach ( t->trackpoints, (GFunc) gpx_write_trackpoint, context ); | |
861 | VIK_TRACKPOINT(t->trackpoints->data)->newsegment = first_tp_is_newsegment; /* restore state */ | |
862 | } | |
863 | ||
864 | /* NB apparently no such thing as a rteseg! */ | |
865 | if (!t->is_route) | |
866 | fprintf ( f, " </trkseg>\n"); | |
867 | ||
868 | fprintf ( f, "</%s>\n", t->is_route ? "rte" : "trk" ); | |
869 | } | |
870 | ||
871 | static void gpx_write_header( FILE *f ) | |
872 | { | |
873 | fprintf(f, "<?xml version=\"1.0\"?>\n" | |
874 | "<gpx version=\"1.0\" creator=\"Viking -- http://viking.sf.net/\"\n" | |
875 | "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n" | |
876 | "xmlns=\"http://www.topografix.com/GPX/1/0\"\n" | |
877 | "xsi:schemaLocation=\"http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd\">\n"); | |
878 | } | |
879 | ||
880 | static void gpx_write_footer( FILE *f ) | |
881 | { | |
882 | fprintf(f, "</gpx>\n"); | |
883 | } | |
884 | ||
885 | static int gpx_waypoint_compare(const void *x, const void *y) | |
886 | { | |
887 | VikWaypoint *a = (VikWaypoint *)x; | |
888 | VikWaypoint *b = (VikWaypoint *)y; | |
889 | return strcmp(a->name,b->name); | |
890 | } | |
891 | ||
892 | static int gpx_track_compare_name(const void *x, const void *y) | |
893 | { | |
894 | VikTrack *a = (VikTrack *)x; | |
895 | VikTrack *b = (VikTrack *)y; | |
896 | return strcmp(a->name,b->name); | |
897 | } | |
898 | ||
899 | /* Function to compare two tracks by their first timestamp */ | |
900 | static int gpx_track_compare_timestamp (const void *x, const void *y) | |
901 | { | |
902 | VikTrack *a = (VikTrack *)x; | |
903 | VikTrack *b = (VikTrack *)y; | |
904 | ||
905 | VikTrackpoint *tpa = NULL; | |
906 | VikTrackpoint *tpb = NULL; | |
907 | ||
908 | if ( a->trackpoints ) | |
909 | tpa = VIK_TRACKPOINT(g_list_first(a->trackpoints)->data); | |
910 | ||
911 | if ( b->trackpoints ) | |
912 | tpb = VIK_TRACKPOINT(g_list_first(b->trackpoints)->data); | |
913 | ||
914 | if ( tpa && tpb ) { | |
915 | if ( tpa->timestamp < tpb->timestamp ) | |
916 | return -1; | |
917 | if ( tpa->timestamp > tpb->timestamp ) | |
918 | return 1; | |
919 | } | |
920 | ||
921 | if ( tpa && !tpb ) | |
922 | return 1; | |
923 | ||
924 | if ( !tpa && tpb ) | |
925 | return -1; | |
926 | ||
927 | return 0; | |
928 | } | |
929 | ||
930 | void a_gpx_write_file ( VikTrwLayer *vtl, FILE *f, GpxWritingOptions *options ) | |
931 | { | |
932 | GpxWritingContext context = { options, f }; | |
933 | ||
934 | gpx_write_header ( f ); | |
935 | ||
936 | // gather waypoints in a list, then sort | |
937 | // g_hash_table_get_values: glib 2.14+ | |
938 | GList *gl = g_hash_table_get_values ( vik_trw_layer_get_waypoints ( vtl ) ); | |
939 | gl = g_list_sort ( gl, gpx_waypoint_compare ); | |
940 | ||
941 | GList *iter; | |
942 | for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) { | |
943 | gpx_write_waypoint ( (VikWaypoint*)iter->data, &context ); | |
944 | } | |
945 | ||
946 | g_list_free ( gl ); | |
947 | ||
948 | gl = g_hash_table_get_values ( vik_trw_layer_get_tracks ( vtl ) ); | |
949 | // Sort method determined by preference | |
950 | if ( a_vik_get_gpx_export_trk_sort() == VIK_GPX_EXPORT_TRK_SORT_TIME ) | |
951 | gl = g_list_sort ( gl, gpx_track_compare_timestamp ); | |
952 | else | |
953 | gl = g_list_sort ( gl, gpx_track_compare_name ); | |
954 | ||
955 | // Routes sorted by name | |
956 | GList *glrte = g_hash_table_get_values ( vik_trw_layer_get_routes ( vtl ) ); | |
957 | glrte = g_list_sort ( glrte, gpx_track_compare_name ); | |
958 | ||
959 | // g_list_concat doesn't copy memory properly | |
960 | // so process each list separately | |
961 | ||
962 | GpxWritingContext context_tmp = context; | |
963 | GpxWritingOptions opt_tmp = { FALSE, FALSE, FALSE }; | |
964 | // Force trackpoints on tracks | |
965 | if ( !context.options ) | |
966 | context_tmp.options = &opt_tmp; | |
967 | context_tmp.options->is_route = FALSE; | |
968 | ||
969 | // Loop around each list and write each one | |
970 | for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) { | |
971 | gpx_write_track ( (VikTrack*)iter->data, &context_tmp ); | |
972 | } | |
973 | ||
974 | // Routes (to get routepoints) | |
975 | context_tmp.options->is_route = TRUE; | |
976 | for (iter = g_list_first (glrte); iter != NULL; iter = g_list_next (iter)) { | |
977 | gpx_write_track ( (VikTrack*)iter->data, &context_tmp ); | |
978 | } | |
979 | ||
980 | g_list_free ( gl ); | |
981 | g_list_free ( glrte ); | |
982 | ||
983 | gpx_write_footer ( f ); | |
984 | } | |
985 | ||
986 | void a_gpx_write_track_file ( VikTrack *trk, FILE *f, GpxWritingOptions *options ) | |
987 | { | |
988 | GpxWritingContext context = {options, f}; | |
989 | gpx_write_header ( f ); | |
990 | gpx_write_track ( trk, &context ); | |
991 | gpx_write_footer ( f ); | |
992 | } |