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