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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 | * | |
9 | * Some of the code adapted from GPSBabel 1.2.7 | |
10 | * http://gpsbabel.sf.net/ | |
11 | * Copyright (C) 2002, 2003, 2004, 2005 Robert Lipe, robertlipe@usa.net | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
26 | * | |
27 | */ | |
28 | #ifdef HAVE_CONFIG_H | |
29 | #include "config.h" | |
30 | #endif | |
31 | ||
32 | #define _XOPEN_SOURCE /* glibc2 needs this */ | |
33 | ||
34 | #include "gpx.h" | |
35 | #include "viking.h" | |
36 | #include <expat.h> | |
37 | #ifdef HAVE_STRING_H | |
38 | #include <string.h> | |
39 | #endif | |
40 | #include <glib.h> | |
41 | #ifdef HAVE_MATH_H | |
42 | #include <math.h> | |
43 | #endif | |
44 | #include <time.h> | |
45 | ||
46 | typedef enum { | |
47 | tt_unknown = 0, | |
48 | ||
49 | tt_gpx, | |
50 | ||
51 | tt_wpt, | |
52 | tt_wpt_desc, | |
53 | tt_wpt_name, | |
54 | tt_wpt_ele, | |
55 | tt_wpt_sym, | |
56 | tt_wpt_link, /* New in GPX 1.1 */ | |
57 | ||
58 | tt_trk, | |
59 | tt_trk_desc, | |
60 | tt_trk_name, | |
61 | ||
62 | tt_trk_trkseg, | |
63 | tt_trk_trkseg_trkpt, | |
64 | tt_trk_trkseg_trkpt_ele, | |
65 | tt_trk_trkseg_trkpt_time, | |
66 | /* extended */ | |
67 | tt_trk_trkseg_trkpt_course, | |
68 | tt_trk_trkseg_trkpt_speed, | |
69 | tt_trk_trkseg_trkpt_fix, | |
70 | tt_trk_trkseg_trkpt_sat, | |
71 | ||
72 | tt_trk_trkseg_trkpt_hdop, | |
73 | tt_trk_trkseg_trkpt_vdop, | |
74 | tt_trk_trkseg_trkpt_pdop, | |
75 | ||
76 | tt_waypoint, | |
77 | tt_waypoint_coord, | |
78 | tt_waypoint_name, | |
79 | } tag_type; | |
80 | ||
81 | typedef struct tag_mapping { | |
82 | tag_type tag_type; /* enum from above for this tag */ | |
83 | const char *tag_name; /* xpath-ish tag name */ | |
84 | } tag_mapping; | |
85 | ||
86 | typedef struct { | |
87 | GpxWritingOptions *options; | |
88 | FILE *file; | |
89 | } GpxWritingContext; | |
90 | ||
91 | /* | |
92 | * xpath(ish) mappings between full tag paths and internal identifers. | |
93 | * These appear in the order they appear in the GPX specification. | |
94 | * If it's not a tag we explictly handle, it doesn't go here. | |
95 | */ | |
96 | ||
97 | tag_mapping tag_path_map[] = { | |
98 | ||
99 | { tt_wpt, "/gpx/wpt" }, | |
100 | ||
101 | { tt_waypoint, "/loc/waypoint" }, | |
102 | { tt_waypoint_coord, "/loc/waypoint/coord" }, | |
103 | { tt_waypoint_name, "/loc/waypoint/name" }, | |
104 | ||
105 | { tt_wpt_ele, "/gpx/wpt/ele" }, | |
106 | { tt_wpt_name, "/gpx/wpt/name" }, | |
107 | { tt_wpt_desc, "/gpx/wpt/desc" }, | |
108 | { tt_wpt_sym, "/gpx/wpt/sym" }, | |
109 | { tt_wpt_sym, "/loc/waypoint/type" }, | |
110 | { tt_wpt_link, "/gpx/wpt/link" }, /* GPX 1.1 */ | |
111 | ||
112 | { tt_trk, "/gpx/trk" }, | |
113 | { tt_trk, "/gpx/rte" }, | |
114 | { tt_trk_name, "/gpx/trk/name" }, | |
115 | { tt_trk_desc, "/gpx/trk/desc" }, | |
116 | { tt_trk_trkseg, "/gpx/trk/trkseg" }, | |
117 | { tt_trk_trkseg_trkpt, "/gpx/trk/trkseg/trkpt" }, | |
118 | { tt_trk_trkseg_trkpt, "/gpx/rte/rtept" }, | |
119 | { tt_trk_trkseg_trkpt_ele, "/gpx/trk/trkseg/trkpt/ele" }, | |
120 | { tt_trk_trkseg_trkpt_time, "/gpx/trk/trkseg/trkpt/time" }, | |
121 | /* extended */ | |
122 | { tt_trk_trkseg_trkpt_course, "/gpx/trk/trkseg/trkpt/course" }, | |
123 | { tt_trk_trkseg_trkpt_speed, "/gpx/trk/trkseg/trkpt/speed" }, | |
124 | { tt_trk_trkseg_trkpt_fix, "/gpx/trk/trkseg/trkpt/fix" }, | |
125 | { tt_trk_trkseg_trkpt_sat, "/gpx/trk/trkseg/trkpt/sat" }, | |
126 | ||
127 | { tt_trk_trkseg_trkpt_hdop, "/gpx/trk/trkseg/trkpt/hdop" }, | |
128 | { tt_trk_trkseg_trkpt_vdop, "/gpx/trk/trkseg/trkpt/vdop" }, | |
129 | { tt_trk_trkseg_trkpt_pdop, "/gpx/trk/trkseg/trkpt/pdop" }, | |
130 | {0} | |
131 | }; | |
132 | ||
133 | static tag_type get_tag(const char *t) | |
134 | { | |
135 | tag_mapping *tm; | |
136 | for (tm = tag_path_map; tm->tag_type != 0; tm++) | |
137 | if (0 == strcmp(tm->tag_name, t)) | |
138 | return tm->tag_type; | |
139 | return tt_unknown; | |
140 | } | |
141 | ||
142 | /******************************************/ | |
143 | ||
144 | tag_type current_tag = tt_unknown; | |
145 | GString *xpath = NULL; | |
146 | GString *c_cdata = NULL; | |
147 | ||
148 | /* current ("c_") objects */ | |
149 | VikTrackpoint *c_tp = NULL; | |
150 | VikWaypoint *c_wp = NULL; | |
151 | VikTrack *c_tr = NULL; | |
152 | ||
153 | gchar *c_wp_name = NULL; | |
154 | gchar *c_tr_name = NULL; | |
155 | ||
156 | /* temporary things so we don't have to create them lots of times */ | |
157 | const gchar *c_slat, *c_slon; | |
158 | struct LatLon c_ll; | |
159 | ||
160 | /* specialty flags / etc */ | |
161 | gboolean f_tr_newseg; | |
162 | guint unnamed_waypoints = 0; | |
163 | guint unnamed_tracks = 0; | |
164 | ||
165 | ||
166 | static const char *get_attr ( const char **attr, const char *key ) | |
167 | { | |
168 | while ( *attr ) { | |
169 | if ( strcmp(*attr,key) == 0 ) | |
170 | return *(attr + 1); | |
171 | attr += 2; | |
172 | } | |
173 | return NULL; | |
174 | } | |
175 | ||
176 | static gboolean set_c_ll ( const char **attr ) | |
177 | { | |
178 | if ( (c_slat = get_attr ( attr, "lat" )) && (c_slon = get_attr ( attr, "lon" )) ) { | |
179 | c_ll.lat = g_ascii_strtod(c_slat, NULL); | |
180 | c_ll.lon = g_ascii_strtod(c_slon, NULL); | |
181 | return TRUE; | |
182 | } | |
183 | return FALSE; | |
184 | } | |
185 | ||
186 | static void gpx_start(VikTrwLayer *vtl, const char *el, const char **attr) | |
187 | { | |
188 | static const gchar *tmp; | |
189 | ||
190 | g_string_append_c ( xpath, '/' ); | |
191 | g_string_append ( xpath, el ); | |
192 | current_tag = get_tag ( xpath->str ); | |
193 | ||
194 | switch ( current_tag ) { | |
195 | ||
196 | case tt_wpt: | |
197 | if ( set_c_ll( attr ) ) { | |
198 | c_wp = vik_waypoint_new (); | |
199 | if ( ! get_attr ( attr, "hidden" ) ) | |
200 | c_wp->visible = TRUE; | |
201 | ||
202 | vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll ); | |
203 | } | |
204 | break; | |
205 | ||
206 | case tt_trk: | |
207 | c_tr = vik_track_new (); | |
208 | if ( ! get_attr ( attr, "hidden" ) ) | |
209 | c_tr->visible = TRUE; | |
210 | break; | |
211 | ||
212 | case tt_trk_trkseg: | |
213 | f_tr_newseg = TRUE; | |
214 | break; | |
215 | ||
216 | case tt_trk_trkseg_trkpt: | |
217 | if ( set_c_ll( attr ) ) { | |
218 | c_tp = vik_trackpoint_new (); | |
219 | vik_coord_load_from_latlon ( &(c_tp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll ); | |
220 | if ( f_tr_newseg ) { | |
221 | c_tp->newsegment = TRUE; | |
222 | f_tr_newseg = FALSE; | |
223 | } | |
224 | c_tr->trackpoints = g_list_append ( c_tr->trackpoints, c_tp ); | |
225 | } | |
226 | break; | |
227 | ||
228 | case tt_trk_trkseg_trkpt_ele: | |
229 | case tt_trk_trkseg_trkpt_time: | |
230 | case tt_wpt_desc: | |
231 | case tt_wpt_name: | |
232 | case tt_wpt_ele: | |
233 | case tt_wpt_link: | |
234 | case tt_trk_desc: | |
235 | case tt_trk_name: | |
236 | g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer */ | |
237 | break; | |
238 | ||
239 | case tt_waypoint: | |
240 | c_wp = vik_waypoint_new (); | |
241 | c_wp->visible = TRUE; | |
242 | break; | |
243 | ||
244 | case tt_waypoint_coord: | |
245 | if ( set_c_ll( attr ) ) | |
246 | vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll ); | |
247 | break; | |
248 | ||
249 | case tt_waypoint_name: | |
250 | if ( ( tmp = get_attr(attr, "id") ) ) { | |
251 | if ( c_wp_name ) | |
252 | g_free ( c_wp_name ); | |
253 | c_wp_name = g_strdup ( tmp ); | |
254 | } | |
255 | g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer for description */ | |
256 | break; | |
257 | ||
258 | default: break; | |
259 | } | |
260 | } | |
261 | ||
262 | static void gpx_end(VikTrwLayer *vtl, const char *el) | |
263 | { | |
264 | static GTimeVal tp_time; | |
265 | ||
266 | g_string_truncate ( xpath, xpath->len - strlen(el) - 1 ); | |
267 | ||
268 | switch ( current_tag ) { | |
269 | ||
270 | case tt_waypoint: | |
271 | case tt_wpt: | |
272 | if ( ! c_wp_name ) | |
273 | c_wp_name = g_strdup_printf("VIKING_WP%d", unnamed_waypoints++); | |
274 | vik_trw_layer_filein_add_waypoint ( vtl, c_wp_name, c_wp ); | |
275 | g_free ( c_wp_name ); | |
276 | c_wp = NULL; | |
277 | c_wp_name = NULL; | |
278 | break; | |
279 | ||
280 | case tt_trk: | |
281 | if ( ! c_tr_name ) | |
282 | c_tr_name = g_strdup_printf("VIKING_TR%d", unnamed_tracks++); | |
283 | vik_trw_layer_filein_add_track ( vtl, c_tr_name, c_tr ); | |
284 | g_free ( c_tr_name ); | |
285 | c_tr = NULL; | |
286 | c_tr_name = NULL; | |
287 | break; | |
288 | ||
289 | case tt_wpt_name: | |
290 | if ( c_wp_name ) | |
291 | g_free ( c_wp_name ); | |
292 | c_wp_name = g_strdup ( c_cdata->str ); | |
293 | g_string_erase ( c_cdata, 0, -1 ); | |
294 | break; | |
295 | ||
296 | case tt_trk_name: | |
297 | if ( c_tr_name ) | |
298 | g_free ( c_tr_name ); | |
299 | c_tr_name = g_strdup ( c_cdata->str ); | |
300 | g_string_erase ( c_cdata, 0, -1 ); | |
301 | break; | |
302 | ||
303 | case tt_wpt_ele: | |
304 | c_wp->altitude = g_ascii_strtod ( c_cdata->str, NULL ); | |
305 | g_string_erase ( c_cdata, 0, -1 ); | |
306 | break; | |
307 | ||
308 | case tt_trk_trkseg_trkpt_ele: | |
309 | c_tp->altitude = g_ascii_strtod ( c_cdata->str, NULL ); | |
310 | g_string_erase ( c_cdata, 0, -1 ); | |
311 | break; | |
312 | ||
313 | case tt_waypoint_name: /* .loc name is really description. */ | |
314 | case tt_wpt_desc: | |
315 | vik_waypoint_set_comment ( c_wp, c_cdata->str ); | |
316 | g_string_erase ( c_cdata, 0, -1 ); | |
317 | break; | |
318 | ||
319 | case tt_wpt_link: | |
320 | vik_waypoint_set_image ( c_wp, c_cdata->str ); | |
321 | g_string_erase ( c_cdata, 0, -1 ); | |
322 | break; | |
323 | ||
324 | case tt_wpt_sym: { | |
325 | gchar *tmp_lower = g_utf8_strdown(c_cdata->str, -1); /* for things like <type>Geocache</type> */ | |
326 | vik_waypoint_set_symbol ( c_wp, tmp_lower ); | |
327 | g_free ( tmp_lower ); | |
328 | g_string_erase ( c_cdata, 0, -1 ); | |
329 | break; | |
330 | } | |
331 | ||
332 | case tt_trk_desc: | |
333 | vik_track_set_comment ( c_tr, c_cdata->str ); | |
334 | g_string_erase ( c_cdata, 0, -1 ); | |
335 | break; | |
336 | ||
337 | case tt_trk_trkseg_trkpt_time: | |
338 | if ( g_time_val_from_iso8601(c_cdata->str, &tp_time) ) { | |
339 | c_tp->timestamp = tp_time.tv_sec; | |
340 | c_tp->has_timestamp = TRUE; | |
341 | } | |
342 | g_string_erase ( c_cdata, 0, -1 ); | |
343 | break; | |
344 | ||
345 | case tt_trk_trkseg_trkpt_course: | |
346 | c_tp->course = g_ascii_strtod ( c_cdata->str, NULL ); | |
347 | g_string_erase ( c_cdata, 0, -1 ); | |
348 | break; | |
349 | ||
350 | case tt_trk_trkseg_trkpt_speed: | |
351 | c_tp->speed = g_ascii_strtod ( c_cdata->str, NULL ); | |
352 | g_string_erase ( c_cdata, 0, -1 ); | |
353 | break; | |
354 | ||
355 | case tt_trk_trkseg_trkpt_fix: | |
356 | if (!strcmp("2d", c_cdata->str)) | |
357 | c_tp->fix_mode = VIK_GPS_MODE_2D; | |
358 | else if (!strcmp("3d", c_cdata->str)) | |
359 | c_tp->fix_mode = VIK_GPS_MODE_3D; | |
360 | else /* TODO: more fix modes here */ | |
361 | c_tp->fix_mode = VIK_GPS_MODE_NOT_SEEN; | |
362 | g_string_erase ( c_cdata, 0, -1 ); | |
363 | break; | |
364 | ||
365 | case tt_trk_trkseg_trkpt_sat: | |
366 | c_tp->nsats = atoi ( c_cdata->str ); | |
367 | g_string_erase ( c_cdata, 0, -1 ); | |
368 | break; | |
369 | ||
370 | case tt_trk_trkseg_trkpt_hdop: | |
371 | c_tp->hdop = g_strtod ( c_cdata->str, NULL ); | |
372 | g_string_erase ( c_cdata, 0, -1 ); | |
373 | break; | |
374 | ||
375 | case tt_trk_trkseg_trkpt_vdop: | |
376 | c_tp->vdop = g_strtod ( c_cdata->str, NULL ); | |
377 | g_string_erase ( c_cdata, 0, -1 ); | |
378 | break; | |
379 | ||
380 | case tt_trk_trkseg_trkpt_pdop: | |
381 | c_tp->pdop = g_strtod ( c_cdata->str, NULL ); | |
382 | g_string_erase ( c_cdata, 0, -1 ); | |
383 | break; | |
384 | ||
385 | default: break; | |
386 | } | |
387 | ||
388 | current_tag = get_tag ( xpath->str ); | |
389 | } | |
390 | ||
391 | static void gpx_cdata(void *dta, const XML_Char *s, int len) | |
392 | { | |
393 | switch ( current_tag ) { | |
394 | case tt_wpt_name: | |
395 | case tt_trk_name: | |
396 | case tt_wpt_ele: | |
397 | case tt_trk_trkseg_trkpt_ele: | |
398 | case tt_wpt_desc: | |
399 | case tt_wpt_sym: | |
400 | case tt_wpt_link: | |
401 | case tt_trk_desc: | |
402 | case tt_trk_trkseg_trkpt_time: | |
403 | case tt_trk_trkseg_trkpt_course: | |
404 | case tt_trk_trkseg_trkpt_speed: | |
405 | case tt_trk_trkseg_trkpt_fix: | |
406 | case tt_trk_trkseg_trkpt_sat: | |
407 | case tt_trk_trkseg_trkpt_hdop: | |
408 | case tt_trk_trkseg_trkpt_vdop: | |
409 | case tt_trk_trkseg_trkpt_pdop: | |
410 | case tt_waypoint_name: /* .loc name is really description. */ | |
411 | g_string_append_len ( c_cdata, s, len ); | |
412 | break; | |
413 | ||
414 | default: break; /* ignore cdata from other things */ | |
415 | } | |
416 | } | |
417 | ||
418 | // make like a "stack" of tag names | |
419 | // like gpspoint's separated like /gpx/wpt/whatever | |
420 | ||
421 | gboolean a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) { | |
422 | XML_Parser parser = XML_ParserCreate(NULL); | |
423 | int done=0, len; | |
424 | enum XML_Status status = XML_STATUS_ERROR; | |
425 | ||
426 | XML_SetElementHandler(parser, (XML_StartElementHandler) gpx_start, (XML_EndElementHandler) gpx_end); | |
427 | XML_SetUserData(parser, vtl); /* in the future we could remove all global variables */ | |
428 | XML_SetCharacterDataHandler(parser, (XML_CharacterDataHandler) gpx_cdata); | |
429 | ||
430 | gchar buf[4096]; | |
431 | ||
432 | g_assert ( f != NULL && vtl != NULL ); | |
433 | ||
434 | xpath = g_string_new ( "" ); | |
435 | c_cdata = g_string_new ( "" ); | |
436 | ||
437 | unnamed_waypoints = 0; | |
438 | unnamed_tracks = 0; | |
439 | ||
440 | while (!done) { | |
441 | len = fread(buf, 1, sizeof(buf)-7, f); | |
442 | done = feof(f) || !len; | |
443 | status = XML_Parse(parser, buf, len, done); | |
444 | } | |
445 | ||
446 | XML_ParserFree (parser); | |
447 | g_string_free ( xpath, TRUE ); | |
448 | g_string_free ( c_cdata, TRUE ); | |
449 | ||
450 | return status != XML_STATUS_ERROR; | |
451 | } | |
452 | ||
453 | /**** entitize from GPSBabel ****/ | |
454 | typedef struct { | |
455 | const char * text; | |
456 | const char * entity; | |
457 | int not_html; | |
458 | } entity_types; | |
459 | ||
460 | static | |
461 | entity_types stdentities[] = { | |
462 | { "&", "&", 0 }, | |
463 | { "'", "'", 1 }, | |
464 | { "<", "<", 0 }, | |
465 | { ">", ">", 0 }, | |
466 | { "\"", """, 0 }, | |
467 | { NULL, NULL, 0 } | |
468 | }; | |
469 | ||
470 | void utf8_to_int( const char *cp, int *bytes, int *value ) | |
471 | { | |
472 | if ( (*cp & 0xe0) == 0xc0 ) { | |
473 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
474 | *bytes = 2; | |
475 | *value = ((*cp & 0x1f) << 6) | | |
476 | (*(cp+1) & 0x3f); | |
477 | } | |
478 | else if ( (*cp & 0xf0) == 0xe0 ) { | |
479 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
480 | if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault; | |
481 | *bytes = 3; | |
482 | *value = ((*cp & 0x0f) << 12) | | |
483 | ((*(cp+1) & 0x3f) << 6) | | |
484 | (*(cp+2) & 0x3f); | |
485 | } | |
486 | else if ( (*cp & 0xf8) == 0xf0 ) { | |
487 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
488 | if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault; | |
489 | if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault; | |
490 | *bytes = 4; | |
491 | *value = ((*cp & 0x07) << 18) | | |
492 | ((*(cp+1) & 0x3f) << 12) | | |
493 | ((*(cp+2) & 0x3f) << 6) | | |
494 | (*(cp+3) & 0x3f); | |
495 | } | |
496 | else if ( (*cp & 0xfc) == 0xf8 ) { | |
497 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
498 | if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault; | |
499 | if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault; | |
500 | if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault; | |
501 | *bytes = 5; | |
502 | *value = ((*cp & 0x03) << 24) | | |
503 | ((*(cp+1) & 0x3f) << 18) | | |
504 | ((*(cp+2) & 0x3f) << 12) | | |
505 | ((*(cp+3) & 0x3f) << 6) | | |
506 | (*(cp+4) & 0x3f); | |
507 | } | |
508 | else if ( (*cp & 0xfe) == 0xfc ) { | |
509 | if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault; | |
510 | if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault; | |
511 | if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault; | |
512 | if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault; | |
513 | if ( (*(cp+5) & 0xc0) != 0x80 ) goto dodefault; | |
514 | *bytes = 6; | |
515 | *value = ((*cp & 0x01) << 30) | | |
516 | ((*(cp+1) & 0x3f) << 24) | | |
517 | ((*(cp+2) & 0x3f) << 18) | | |
518 | ((*(cp+3) & 0x3f) << 12) | | |
519 | ((*(cp+4) & 0x3f) << 6) | | |
520 | (*(cp+5) & 0x3f); | |
521 | } | |
522 | else { | |
523 | dodefault: | |
524 | *bytes = 1; | |
525 | *value = (unsigned char)*cp; | |
526 | } | |
527 | } | |
528 | ||
529 | static | |
530 | char * | |
531 | entitize(const char * str) | |
532 | { | |
533 | int elen, ecount, nsecount; | |
534 | entity_types *ep; | |
535 | const char * cp; | |
536 | char * p, * tmp, * xstr; | |
537 | ||
538 | char tmpsub[20]; | |
539 | int bytes = 0; | |
540 | int value = 0; | |
541 | ep = stdentities; | |
542 | elen = ecount = nsecount = 0; | |
543 | ||
544 | /* figure # of entity replacements and additional size. */ | |
545 | while (ep->text) { | |
546 | cp = str; | |
547 | while ((cp = strstr(cp, ep->text)) != NULL) { | |
548 | elen += strlen(ep->entity) - strlen(ep->text); | |
549 | ecount++; | |
550 | cp += strlen(ep->text); | |
551 | } | |
552 | ep++; | |
553 | } | |
554 | ||
555 | /* figure the same for other than standard entities (i.e. anything | |
556 | * that isn't in the range U+0000 to U+007F */ | |
557 | for ( cp = str; *cp; cp++ ) { | |
558 | if ( *cp & 0x80 ) { | |
559 | ||
560 | utf8_to_int( cp, &bytes, &value ); | |
561 | cp += bytes-1; | |
562 | elen += sprintf( tmpsub, "&#x%x;", value ) - bytes; | |
563 | nsecount++; | |
564 | } | |
565 | } | |
566 | ||
567 | /* enough space for the whole string plus entity replacements, if any */ | |
568 | tmp = g_malloc((strlen(str) + elen + 1)); | |
569 | strcpy(tmp, str); | |
570 | ||
571 | /* no entity replacements */ | |
572 | if (ecount == 0 && nsecount == 0) | |
573 | return (tmp); | |
574 | ||
575 | if ( ecount != 0 ) { | |
576 | for (ep = stdentities; ep->text; ep++) { | |
577 | p = tmp; | |
578 | while ((p = strstr(p, ep->text)) != NULL) { | |
579 | elen = strlen(ep->entity); | |
580 | ||
581 | xstr = g_strdup(p + strlen(ep->text)); | |
582 | ||
583 | strcpy(p, ep->entity); | |
584 | strcpy(p + elen, xstr); | |
585 | ||
586 | g_free(xstr); | |
587 | ||
588 | p += elen; | |
589 | } | |
590 | } | |
591 | } | |
592 | ||
593 | if ( nsecount != 0 ) { | |
594 | p = tmp; | |
595 | while (*p) { | |
596 | if ( *p & 0x80 ) { | |
597 | utf8_to_int( p, &bytes, &value ); | |
598 | if ( p[bytes] ) { | |
599 | xstr = g_strdup( p + bytes ); | |
600 | } | |
601 | else { | |
602 | xstr = NULL; | |
603 | } | |
604 | sprintf( p, "&#x%x;", value ); | |
605 | p = p+strlen(p); | |
606 | if ( xstr ) { | |
607 | strcpy( p, xstr ); | |
608 | g_free(xstr); | |
609 | } | |
610 | } | |
611 | else { | |
612 | p++; | |
613 | } | |
614 | } | |
615 | } | |
616 | return (tmp); | |
617 | } | |
618 | /**** end GPSBabel code ****/ | |
619 | ||
620 | /* export GPX */ | |
621 | ||
622 | static void gpx_write_waypoint ( VikWaypoint *wp, GpxWritingContext *context ) | |
623 | { | |
624 | FILE *f = context->file; | |
625 | static struct LatLon ll; | |
626 | gchar *s_lat,*s_lon; | |
627 | gchar *tmp; | |
628 | vik_coord_to_latlon ( &(wp->coord), &ll ); | |
629 | s_lat = a_coords_dtostr( ll.lat ); | |
630 | s_lon = a_coords_dtostr( ll.lon ); | |
631 | fprintf ( f, "<wpt lat=\"%s\" lon=\"%s\"%s>\n", | |
632 | s_lat, s_lon, wp->visible ? "" : " hidden=\"hidden\"" ); | |
633 | g_free ( s_lat ); | |
634 | g_free ( s_lon ); | |
635 | ||
636 | // Sanity clause | |
637 | if ( wp->name ) | |
638 | tmp = entitize ( wp->name ); | |
639 | else | |
640 | tmp = g_strdup ("waypoint"); | |
641 | ||
642 | fprintf ( f, " <name>%s</name>\n", tmp ); | |
643 | g_free ( tmp); | |
644 | ||
645 | if ( wp->altitude != VIK_DEFAULT_ALTITUDE ) | |
646 | { | |
647 | tmp = a_coords_dtostr ( wp->altitude ); | |
648 | fprintf ( f, " <ele>%s</ele>\n", tmp ); | |
649 | g_free ( tmp ); | |
650 | } | |
651 | if ( wp->comment ) | |
652 | { | |
653 | tmp = entitize(wp->comment); | |
654 | fprintf ( f, " <desc>%s</desc>\n", tmp ); | |
655 | g_free ( tmp ); | |
656 | } | |
657 | if ( wp->image ) | |
658 | { | |
659 | tmp = entitize(wp->image); | |
660 | fprintf ( f, " <link>%s</link>\n", tmp ); | |
661 | g_free ( tmp ); | |
662 | } | |
663 | if ( wp->symbol ) | |
664 | { | |
665 | tmp = entitize(wp->symbol); | |
666 | fprintf ( f, " <sym>%s</sym>\n", tmp); | |
667 | g_free ( tmp ); | |
668 | } | |
669 | ||
670 | fprintf ( f, "</wpt>\n" ); | |
671 | } | |
672 | ||
673 | static void gpx_write_trackpoint ( VikTrackpoint *tp, GpxWritingContext *context ) | |
674 | { | |
675 | FILE *f = context->file; | |
676 | static struct LatLon ll; | |
677 | gchar *s_lat,*s_lon, *s_alt, *s_dop; | |
678 | gchar *time_iso8601; | |
679 | vik_coord_to_latlon ( &(tp->coord), &ll ); | |
680 | ||
681 | if ( tp->newsegment ) | |
682 | fprintf ( f, " </trkseg>\n <trkseg>\n" ); | |
683 | ||
684 | s_lat = a_coords_dtostr( ll.lat ); | |
685 | s_lon = a_coords_dtostr( ll.lon ); | |
686 | fprintf ( f, " <trkpt lat=\"%s\" lon=\"%s\">\n", s_lat, s_lon ); | |
687 | g_free ( s_lat ); s_lat = NULL; | |
688 | g_free ( s_lon ); s_lon = NULL; | |
689 | ||
690 | s_alt = NULL; | |
691 | if ( tp->altitude != VIK_DEFAULT_ALTITUDE ) | |
692 | { | |
693 | s_alt = a_coords_dtostr ( tp->altitude ); | |
694 | } | |
695 | else if ( context->options != NULL && context->options->force_ele ) | |
696 | { | |
697 | s_alt = a_coords_dtostr ( 0 ); | |
698 | } | |
699 | if (s_alt != NULL) | |
700 | fprintf ( f, " <ele>%s</ele>\n", s_alt ); | |
701 | g_free ( s_alt ); s_alt = NULL; | |
702 | ||
703 | time_iso8601 = NULL; | |
704 | if ( tp->has_timestamp ) { | |
705 | GTimeVal timestamp; | |
706 | timestamp.tv_sec = tp->timestamp; | |
707 | timestamp.tv_usec = 0; | |
708 | ||
709 | time_iso8601 = g_time_val_to_iso8601 ( ×tamp ); | |
710 | } | |
711 | else if ( context->options != NULL && context->options->force_time ) | |
712 | { | |
713 | GTimeVal current; | |
714 | g_get_current_time ( ¤t ); | |
715 | ||
716 | time_iso8601 = g_time_val_to_iso8601 ( ¤t ); | |
717 | } | |
718 | if ( time_iso8601 != NULL ) | |
719 | fprintf ( f, " <time>%s</time>\n", time_iso8601 ); | |
720 | g_free(time_iso8601); | |
721 | time_iso8601 = NULL; | |
722 | ||
723 | if (!isnan(tp->course)) { | |
724 | gchar *s_course = a_coords_dtostr(tp->course); | |
725 | fprintf ( f, " <course>%s</course>\n", s_course ); | |
726 | g_free(s_course); | |
727 | } | |
728 | if (!isnan(tp->speed)) { | |
729 | gchar *s_speed = a_coords_dtostr(tp->speed); | |
730 | fprintf ( f, " <speed>%s</speed>\n", s_speed ); | |
731 | g_free(s_speed); | |
732 | } | |
733 | if (tp->fix_mode == VIK_GPS_MODE_2D) | |
734 | fprintf ( f, " <fix>2d</fix>\n"); | |
735 | if (tp->fix_mode == VIK_GPS_MODE_3D) | |
736 | fprintf ( f, " <fix>3d</fix>\n"); | |
737 | if (tp->nsats > 0) | |
738 | fprintf ( f, " <sat>%d</sat>\n", tp->nsats ); | |
739 | ||
740 | s_dop = NULL; | |
741 | if ( tp->hdop != VIK_DEFAULT_DOP ) | |
742 | { | |
743 | s_dop = a_coords_dtostr ( tp->hdop ); | |
744 | } | |
745 | if (s_dop != NULL) | |
746 | fprintf ( f, " <hdop>%s</hdop>\n", s_dop ); | |
747 | g_free ( s_dop ); s_dop = NULL; | |
748 | ||
749 | if ( tp->vdop != VIK_DEFAULT_DOP ) | |
750 | { | |
751 | s_dop = a_coords_dtostr ( tp->vdop ); | |
752 | } | |
753 | if (s_dop != NULL) | |
754 | fprintf ( f, " <vdop>%s</vdop>\n", s_dop ); | |
755 | g_free ( s_dop ); s_dop = NULL; | |
756 | ||
757 | if ( tp->pdop != VIK_DEFAULT_DOP ) | |
758 | { | |
759 | s_dop = a_coords_dtostr ( tp->pdop ); | |
760 | } | |
761 | if (s_dop != NULL) | |
762 | fprintf ( f, " <pdop>%s</pdop>\n", s_dop ); | |
763 | g_free ( s_dop ); s_dop = NULL; | |
764 | ||
765 | ||
766 | fprintf ( f, " </trkpt>\n" ); | |
767 | } | |
768 | ||
769 | ||
770 | static void gpx_write_track ( VikTrack *t, GpxWritingContext *context ) | |
771 | { | |
772 | FILE *f = context->file; | |
773 | gchar *tmp; | |
774 | gboolean first_tp_is_newsegment = FALSE; /* must temporarily make it not so, but we want to restore state. not that it matters. */ | |
775 | ||
776 | // Sanity clause | |
777 | if ( t->name ) | |
778 | tmp = entitize ( t->name ); | |
779 | else | |
780 | tmp = g_strdup ("track"); | |
781 | ||
782 | fprintf ( f, "<trk%s>\n <name>%s</name>\n", t->visible ? "" : " hidden=\"hidden\"", tmp ); | |
783 | g_free ( tmp ); | |
784 | ||
785 | if ( t->comment ) | |
786 | { | |
787 | tmp = entitize ( t->comment ); | |
788 | fprintf ( f, " <desc>%s</desc>\n", tmp ); | |
789 | g_free ( tmp ); | |
790 | } | |
791 | ||
792 | fprintf ( f, " <trkseg>\n" ); | |
793 | ||
794 | if ( t->trackpoints && t->trackpoints->data ) { | |
795 | first_tp_is_newsegment = VIK_TRACKPOINT(t->trackpoints->data)->newsegment; | |
796 | VIK_TRACKPOINT(t->trackpoints->data)->newsegment = FALSE; /* so we won't write </trkseg><trkseg> already */ | |
797 | g_list_foreach ( t->trackpoints, (GFunc) gpx_write_trackpoint, context ); | |
798 | VIK_TRACKPOINT(t->trackpoints->data)->newsegment = first_tp_is_newsegment; /* restore state */ | |
799 | } | |
800 | ||
801 | fprintf ( f, "</trkseg>\n</trk>\n" ); | |
802 | } | |
803 | ||
804 | static void gpx_write_header( FILE *f ) | |
805 | { | |
806 | fprintf(f, "<?xml version=\"1.0\"?>\n" | |
807 | "<gpx version=\"1.0\" creator=\"Viking -- http://viking.sf.net/\"\n" | |
808 | "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n" | |
809 | "xmlns=\"http://www.topografix.com/GPX/1/0\"\n" | |
810 | "xsi:schemaLocation=\"http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd\">\n"); | |
811 | } | |
812 | ||
813 | static void gpx_write_footer( FILE *f ) | |
814 | { | |
815 | fprintf(f, "</gpx>\n"); | |
816 | } | |
817 | ||
818 | /* Type to hold name of track and timestamp of first trackpoint */ | |
819 | typedef struct { | |
820 | time_t first_timestamp; | |
821 | gpointer id; | |
822 | } gpx_track_and_timestamp; | |
823 | ||
824 | typedef struct { | |
825 | gpx_track_and_timestamp *trks; | |
826 | guint i; | |
827 | guint n_trks; | |
828 | } gpx_gather_tracks_passalong_t; | |
829 | ||
830 | /* Function to collect a track and the first timestamp in the list */ | |
831 | static void gpx_collect_track (const gpointer id, VikTrack *track, gpx_gather_tracks_passalong_t *passalong) | |
832 | { | |
833 | if (passalong->i < passalong->n_trks) | |
834 | { | |
835 | passalong->trks[passalong->i].id = id; | |
836 | if (track && track->trackpoints && track->trackpoints->data) | |
837 | { | |
838 | VikTrackpoint *first_point = (VikTrackpoint *)track->trackpoints->data; | |
839 | passalong->trks[passalong->i].first_timestamp = first_point->timestamp; | |
840 | } | |
841 | else | |
842 | { | |
843 | passalong->trks[passalong->i].first_timestamp = 0; | |
844 | } | |
845 | passalong->i++; | |
846 | } | |
847 | } | |
848 | ||
849 | static int gpx_waypoint_compare(const void *x, const void *y) | |
850 | { | |
851 | VikWaypoint *a = (VikWaypoint *)x; | |
852 | VikWaypoint *b = (VikWaypoint *)y; | |
853 | return strcmp(a->name,b->name); | |
854 | } | |
855 | ||
856 | /* Function to compare two tracks by their first timestamp */ | |
857 | static int gpx_track_and_timestamp_compare(const void *x, const void *y) | |
858 | { | |
859 | gpx_track_and_timestamp *a = (gpx_track_and_timestamp *)x; | |
860 | gpx_track_and_timestamp *b = (gpx_track_and_timestamp *)y; | |
861 | if (a->first_timestamp < b->first_timestamp) | |
862 | { | |
863 | return -1; | |
864 | } | |
865 | if (a->first_timestamp > b->first_timestamp) | |
866 | { | |
867 | return 1; | |
868 | } | |
869 | return 0; | |
870 | } | |
871 | ||
872 | void a_gpx_write_file( VikTrwLayer *vtl, FILE *f ) | |
873 | { | |
874 | a_gpx_write_file_options(NULL, vtl, f); | |
875 | } | |
876 | ||
877 | void a_gpx_write_file_options ( GpxWritingOptions *options, VikTrwLayer *vtl, FILE *f ) | |
878 | { | |
879 | GpxWritingContext context = { options, f }; | |
880 | ||
881 | gpx_write_header ( f ); | |
882 | ||
883 | // gather waypoints in a list, then sort | |
884 | // g_hash_table_get_values: glib 2.14+ | |
885 | GList *gl = g_hash_table_get_values ( vik_trw_layer_get_waypoints ( vtl ) ); | |
886 | gl = g_list_sort ( gl, gpx_waypoint_compare ); | |
887 | ||
888 | GList *iter; | |
889 | for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) { | |
890 | gpx_write_waypoint ( (VikWaypoint*)iter->data, &context ); | |
891 | } | |
892 | ||
893 | g_list_free ( gl ); | |
894 | ||
895 | gpx_gather_tracks_passalong_t passalong_tracks; | |
896 | passalong_tracks.n_trks = g_hash_table_size ( vik_trw_layer_get_tracks (vtl) ); | |
897 | passalong_tracks.i = 0; | |
898 | passalong_tracks.trks = g_new(gpx_track_and_timestamp,passalong_tracks.n_trks); | |
899 | g_hash_table_foreach (vik_trw_layer_get_tracks(vtl), (GHFunc) gpx_collect_track, &passalong_tracks); | |
900 | /* Sort by timestamp */ | |
901 | gl = g_hash_table_get_values ( vik_trw_layer_get_tracks ( vtl ) ); | |
902 | gl = g_list_sort ( gl, gpx_track_and_timestamp_compare ); | |
903 | ||
904 | for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) { | |
905 | gpx_write_track ( (VikTrack*)iter->data, &context ); | |
906 | } | |
907 | ||
908 | g_list_free ( gl ); | |
909 | ||
910 | g_free ( passalong_tracks.trks ); | |
911 | gpx_write_footer ( f ); | |
912 | } | |
913 | ||
914 | void a_gpx_write_track_file ( VikTrack *trk, FILE *f ) | |
915 | { | |
916 | a_gpx_write_track_file_options ( NULL, trk, f ); | |
917 | } | |
918 | ||
919 | void a_gpx_write_track_file_options ( GpxWritingOptions *options, VikTrack *trk, FILE *f ) | |
920 | { | |
921 | GpxWritingContext context = {options, f}; | |
922 | gpx_write_header ( f ); | |
923 | gpx_write_track ( trk, &context ); | |
924 | gpx_write_footer ( f ); | |
925 | } |