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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 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | #ifdef HAVE_CONFIG_H | |
22 | #include "config.h" | |
23 | #endif | |
24 | ||
25 | #ifdef HAVE_MATH_H | |
26 | #include <math.h> | |
27 | #endif | |
28 | ||
29 | #include "viking.h" | |
30 | ||
31 | #include <ctype.h> | |
32 | #ifdef HAVE_STRING_H | |
33 | #include <string.h> | |
34 | #endif | |
35 | ||
36 | #include <stdlib.h> | |
37 | /* strtod */ | |
38 | ||
39 | ||
40 | static void a_gpspoint_write_track ( const gchar *name, VikTrack *t, FILE *f ); | |
41 | static void a_gpspoint_write_trackpoint ( VikTrackpoint *tp, FILE *f ); | |
42 | static void a_gpspoint_write_waypoint ( const gchar *name, VikWaypoint *wp, FILE *f ); | |
43 | ||
44 | ||
45 | /* outline for file gpspoint.c | |
46 | ||
47 | reading file: | |
48 | ||
49 | take a line. | |
50 | get first tag, if not type, skip it. | |
51 | if type, record type. if waypoint list, etc move on. if track, make a new track, make it current track, add it, etc. | |
52 | if waypoint, read on and store to the waypoint. | |
53 | if trackpoint, make trackpoint, store to current track (error / skip if none) | |
54 | ||
55 | */ | |
56 | ||
57 | /* Thanks to etrex-cache's gpsbabel's gpspoint.c for starting me off! */ | |
58 | ||
59 | static char line_buffer[2048]; | |
60 | ||
61 | #define GPSPOINT_TYPE_NONE 0 | |
62 | #define GPSPOINT_TYPE_WAYPOINT 1 | |
63 | #define GPSPOINT_TYPE_TRACKPOINT 2 | |
64 | /* #define GPSPOINT_TYPE_ROUTEPOINT 3 */ | |
65 | #define GPSPOINT_TYPE_TRACK 4 | |
66 | ||
67 | /* #define GPSPOINT_TYPE_ROUTE 5 */ | |
68 | ||
69 | static VikTrack *current_track; /* pointer to pointer to first GList */ | |
70 | ||
71 | static gint line_type = GPSPOINT_TYPE_NONE; | |
72 | static struct LatLon line_latlon; | |
73 | static gchar *line_name; | |
74 | static gchar *line_comment; | |
75 | static gchar *line_image; | |
76 | static gchar *line_symbol; | |
77 | static gboolean line_newsegment = FALSE; | |
78 | static gboolean line_has_timestamp = FALSE; | |
79 | static time_t line_timestamp = 0; | |
80 | static gdouble line_altitude = VIK_DEFAULT_ALTITUDE; | |
81 | static gboolean line_visible = TRUE; | |
82 | ||
83 | static gboolean line_extended = FALSE; | |
84 | static gdouble line_speed = NAN; | |
85 | static gdouble line_course = NAN; | |
86 | static gint line_sat = 0; | |
87 | static gint line_fix = 0; | |
88 | /* other possible properties go here */ | |
89 | ||
90 | ||
91 | static void gpspoint_process_tag ( const gchar *tag, gint len ); | |
92 | static void gpspoint_process_key_and_value ( const gchar *key, gint key_len, const gchar *value, gint value_len ); | |
93 | ||
94 | static gchar *slashdup(const gchar *str) | |
95 | { | |
96 | guint16 len = strlen(str); | |
97 | guint16 need_bs_count, i, j; | |
98 | gchar *rv; | |
99 | for ( i = 0, need_bs_count = 0; i < len; i++ ) | |
100 | if ( str[i] == '\\' || str[i] == '"' ) | |
101 | need_bs_count++; | |
102 | rv = g_malloc ( (len+need_bs_count+1) * sizeof(gchar) ); | |
103 | for ( i = 0, j = 0; i < len; i++, j++ ) | |
104 | { | |
105 | if ( str[i] == '\\' || str[i] == '"' ) | |
106 | rv[j++] = '\\'; | |
107 | rv[j] = str[i]; | |
108 | } | |
109 | rv[j] = '\0'; | |
110 | return rv; | |
111 | } | |
112 | ||
113 | static gchar *deslashndup ( const gchar *str, guint16 len ) | |
114 | { | |
115 | guint16 i,j, bs_count, new_len; | |
116 | gboolean backslash = FALSE; | |
117 | gchar *rv; | |
118 | ||
119 | if ( len < 1 ) | |
120 | return NULL; | |
121 | ||
122 | for ( i = 0, bs_count = 0; i < len; i++ ) | |
123 | if ( str[i] == '\\' ) | |
124 | { | |
125 | bs_count++; | |
126 | i++; | |
127 | } | |
128 | ||
129 | if ( str[i-1] == '\\' && (len == 1 || str[i-2] != '\\') ) | |
130 | bs_count--; | |
131 | ||
132 | new_len = len - bs_count; | |
133 | rv = g_malloc ( (new_len+1) * sizeof(gchar) ); | |
134 | for ( i = 0, j = 0; i < len && j < new_len; i++ ) | |
135 | if ( str[i] == '\\' && !backslash ) | |
136 | backslash = TRUE; | |
137 | else | |
138 | { | |
139 | rv[j++] = str[i]; | |
140 | backslash = FALSE; | |
141 | } | |
142 | ||
143 | rv[new_len] = '\0'; | |
144 | return rv; | |
145 | } | |
146 | ||
147 | void a_gpspoint_read_file(VikTrwLayer *trw, FILE *f ) { | |
148 | VikCoordMode coord_mode = vik_trw_layer_get_coord_mode ( trw ); | |
149 | gchar *tag_start, *tag_end; | |
150 | g_assert ( f != NULL && trw != NULL ); | |
151 | line_type = 0; | |
152 | line_timestamp = 0; | |
153 | line_newsegment = FALSE; | |
154 | line_image = NULL; | |
155 | line_symbol = NULL; | |
156 | ||
157 | current_track = NULL; | |
158 | while (fgets(line_buffer, 2048, f)) | |
159 | { | |
160 | gboolean inside_quote = 0; | |
161 | gboolean backslash = 0; | |
162 | ||
163 | line_buffer[strlen(line_buffer)-1] = '\0'; /* chop off newline */ | |
164 | ||
165 | /* for gpspoint files wrapped inside */ | |
166 | if ( strlen(line_buffer) >= 13 && strncmp ( line_buffer, "~EndLayerData", 13 ) == 0 ) | |
167 | break; | |
168 | ||
169 | /* each line: nullify stuff, make thing if nes, free name if ness */ | |
170 | tag_start = line_buffer; | |
171 | for (;;) | |
172 | { | |
173 | /* my addition: find first non-whitespace character. if the null, skip line. */ | |
174 | while (*tag_start != '\0' && isspace(*tag_start)) | |
175 | tag_start++; | |
176 | if (tag_start == '\0') | |
177 | break; | |
178 | ||
179 | if (*tag_start == '#') | |
180 | break; | |
181 | ||
182 | tag_end = tag_start; | |
183 | if (*tag_end == '"') | |
184 | inside_quote = !inside_quote; | |
185 | while (*tag_end != '\0' && (!isspace(*tag_end) || inside_quote)) { | |
186 | tag_end++; | |
187 | if (*tag_end == '\\' && !backslash) | |
188 | backslash = TRUE; | |
189 | else if (backslash) | |
190 | backslash = FALSE; | |
191 | else if (*tag_end == '"') | |
192 | inside_quote = !inside_quote; | |
193 | } | |
194 | ||
195 | gpspoint_process_tag ( tag_start, tag_end - tag_start ); | |
196 | ||
197 | if (*tag_end == '\0' ) | |
198 | break; | |
199 | else | |
200 | tag_start = tag_end+1; | |
201 | } | |
202 | if (line_type == GPSPOINT_TYPE_WAYPOINT && line_name) | |
203 | { | |
204 | VikWaypoint *wp = vik_waypoint_new(); | |
205 | wp->visible = line_visible; | |
206 | wp->altitude = line_altitude; | |
207 | ||
208 | vik_coord_load_from_latlon ( &(wp->coord), coord_mode, &line_latlon ); | |
209 | ||
210 | vik_trw_layer_filein_add_waypoint ( trw, line_name, wp ); | |
211 | g_free ( line_name ); | |
212 | line_name = NULL; | |
213 | ||
214 | if ( line_comment ) | |
215 | { | |
216 | vik_waypoint_set_comment ( wp, line_comment ); | |
217 | line_comment = NULL; | |
218 | } | |
219 | ||
220 | if ( line_image ) | |
221 | { | |
222 | vik_waypoint_set_image ( wp, line_image ); | |
223 | line_image = NULL; | |
224 | } | |
225 | ||
226 | if ( line_symbol ) | |
227 | { | |
228 | vik_waypoint_set_symbol ( wp, line_symbol ); | |
229 | line_symbol = NULL; | |
230 | } | |
231 | } | |
232 | else if (line_type == GPSPOINT_TYPE_TRACK && line_name) | |
233 | { | |
234 | VikTrack *pl = vik_track_new(); | |
235 | ||
236 | /* Thanks to Peter Jones for this Fix */ | |
237 | if (!line_name) line_name = g_strdup("UNK"); | |
238 | ||
239 | pl->visible = line_visible; | |
240 | ||
241 | if ( line_comment ) | |
242 | { | |
243 | vik_track_set_comment ( pl, line_comment ); | |
244 | line_comment = NULL; | |
245 | } | |
246 | ||
247 | pl->trackpoints = NULL; | |
248 | vik_trw_layer_filein_add_track ( trw, line_name, pl ); | |
249 | g_free ( line_name ); | |
250 | line_name = NULL; | |
251 | ||
252 | current_track = pl; | |
253 | } | |
254 | else if (line_type == GPSPOINT_TYPE_TRACKPOINT && current_track) | |
255 | { | |
256 | VikTrackpoint *tp = vik_trackpoint_new(); | |
257 | vik_coord_load_from_latlon ( &(tp->coord), coord_mode, &line_latlon ); | |
258 | tp->newsegment = line_newsegment; | |
259 | tp->has_timestamp = line_has_timestamp; | |
260 | tp->timestamp = line_timestamp; | |
261 | tp->altitude = line_altitude; | |
262 | if (line_extended) { | |
263 | tp->speed = line_speed; | |
264 | tp->course = line_course; | |
265 | tp->nsats = line_sat; | |
266 | tp->fix_mode = line_fix; | |
267 | } | |
268 | current_track->trackpoints = g_list_append ( current_track->trackpoints, tp ); | |
269 | } | |
270 | ||
271 | if (line_name) | |
272 | g_free ( line_name ); | |
273 | line_name = NULL; | |
274 | if (line_comment) | |
275 | g_free ( line_comment ); | |
276 | if (line_image) | |
277 | g_free ( line_image ); | |
278 | if (line_symbol) | |
279 | g_free ( line_symbol ); | |
280 | line_comment = NULL; | |
281 | line_image = NULL; | |
282 | line_symbol = NULL; | |
283 | line_type = GPSPOINT_TYPE_NONE; | |
284 | line_newsegment = FALSE; | |
285 | line_has_timestamp = FALSE; | |
286 | line_timestamp = 0; | |
287 | line_altitude = VIK_DEFAULT_ALTITUDE; | |
288 | line_visible = TRUE; | |
289 | line_symbol = NULL; | |
290 | ||
291 | line_extended = FALSE; | |
292 | line_speed = NAN; | |
293 | line_course = NAN; | |
294 | line_sat = 0; | |
295 | line_fix = 0; | |
296 | } | |
297 | } | |
298 | ||
299 | /* Tag will be of a few defined forms: | |
300 | ^[:alpha:]*=".*"$ | |
301 | ^[:alpha:]*=.*$ | |
302 | ||
303 | <invalid tag> | |
304 | ||
305 | So we must determine end of tag name, start of value, end of value. | |
306 | */ | |
307 | static void gpspoint_process_tag ( const gchar *tag, gint len ) | |
308 | { | |
309 | const gchar *key_end, *value_start, *value_end; | |
310 | ||
311 | /* Searching for key end */ | |
312 | key_end = tag; | |
313 | ||
314 | while (++key_end - tag < len) | |
315 | if (*key_end == '=') | |
316 | break; | |
317 | ||
318 | if (key_end - tag == len) | |
319 | return; /* no good */ | |
320 | ||
321 | if (key_end - tag == len + 1) | |
322 | value_start = value_end = 0; /* size = 0 */ | |
323 | else | |
324 | { | |
325 | value_start = key_end + 1; /* equal_sign plus one */ | |
326 | ||
327 | if (*value_start == '"') | |
328 | { | |
329 | value_start++; | |
330 | if (*value_start == '"') | |
331 | value_start = value_end = 0; /* size = 0 */ | |
332 | else | |
333 | { | |
334 | if (*(tag+len-1) == '"') | |
335 | value_end = tag + len - 1; | |
336 | else | |
337 | return; /* bogus */ | |
338 | } | |
339 | } | |
340 | else | |
341 | value_end = tag + len; /* value start really IS value start. */ | |
342 | ||
343 | gpspoint_process_key_and_value(tag, key_end - tag, value_start, value_end - value_start); | |
344 | } | |
345 | } | |
346 | ||
347 | /* | |
348 | value = NULL for none | |
349 | */ | |
350 | static void gpspoint_process_key_and_value ( const gchar *key, gint key_len, const gchar *value, gint value_len ) | |
351 | { | |
352 | if (key_len == 4 && strncasecmp( key, "type", key_len ) == 0 ) | |
353 | { | |
354 | if (value == NULL) | |
355 | line_type = GPSPOINT_TYPE_NONE; | |
356 | else if (value_len == 5 && strncasecmp( value, "track", value_len ) == 0 ) | |
357 | line_type = GPSPOINT_TYPE_TRACK; | |
358 | else if (value_len == 10 && strncasecmp( value, "trackpoint", value_len ) == 0 ) | |
359 | line_type = GPSPOINT_TYPE_TRACKPOINT; | |
360 | else if (value_len == 8 && strncasecmp( value, "waypoint", value_len ) == 0 ) | |
361 | line_type = GPSPOINT_TYPE_WAYPOINT; | |
362 | else | |
363 | /* all others are ignored */ | |
364 | line_type = GPSPOINT_TYPE_NONE; | |
365 | } | |
366 | else if (key_len == 4 && strncasecmp( key, "name", key_len ) == 0 && value != NULL) | |
367 | { | |
368 | if (line_name == NULL) | |
369 | { | |
370 | line_name = g_strndup ( value, value_len ); | |
371 | } | |
372 | } | |
373 | else if (key_len == 7 && strncasecmp( key, "comment", key_len ) == 0 && value != NULL) | |
374 | { | |
375 | if (line_comment == NULL) | |
376 | line_comment = deslashndup ( value, value_len ); | |
377 | } | |
378 | else if (key_len == 5 && strncasecmp( key, "image", key_len ) == 0 && value != NULL) | |
379 | { | |
380 | if (line_image == NULL) | |
381 | line_image = deslashndup ( value, value_len ); | |
382 | } | |
383 | else if (key_len == 8 && strncasecmp( key, "latitude", key_len ) == 0 && value != NULL) | |
384 | { | |
385 | line_latlon.lat = g_ascii_strtod(value, NULL); | |
386 | } | |
387 | else if (key_len == 9 && strncasecmp( key, "longitude", key_len ) == 0 && value != NULL) | |
388 | { | |
389 | line_latlon.lon = g_ascii_strtod(value, NULL); | |
390 | } | |
391 | else if (key_len == 8 && strncasecmp( key, "altitude", key_len ) == 0 && value != NULL) | |
392 | { | |
393 | line_altitude = g_ascii_strtod(value, NULL); | |
394 | } | |
395 | else if (key_len == 7 && strncasecmp( key, "visible", key_len ) == 0 && value[0] != 'y' && value[0] != 'Y' && value[0] != 't' && value[0] != 'T') | |
396 | { | |
397 | line_visible = FALSE; | |
398 | } | |
399 | else if (key_len == 6 && strncasecmp( key, "symbol", key_len ) == 0 && value != NULL) | |
400 | { | |
401 | line_symbol = g_strndup ( value, value_len ); | |
402 | } | |
403 | else if (key_len == 8 && strncasecmp( key, "unixtime", key_len ) == 0 && value != NULL) | |
404 | { | |
405 | line_timestamp = g_ascii_strtod(value, NULL); | |
406 | if ( line_timestamp != 0x80000000 ) | |
407 | line_has_timestamp = TRUE; | |
408 | } | |
409 | else if (key_len == 10 && strncasecmp( key, "newsegment", key_len ) == 0 && value != NULL) | |
410 | { | |
411 | line_newsegment = TRUE; | |
412 | } | |
413 | else if (key_len == 8 && strncasecmp( key, "extended", key_len ) == 0 && value != NULL) | |
414 | { | |
415 | line_extended = TRUE; | |
416 | } | |
417 | else if (key_len == 5 && strncasecmp( key, "speed", key_len ) == 0 && value != NULL) | |
418 | { | |
419 | line_speed = g_ascii_strtod(value, NULL); | |
420 | } | |
421 | else if (key_len == 6 && strncasecmp( key, "course", key_len ) == 0 && value != NULL) | |
422 | { | |
423 | line_course = g_ascii_strtod(value, NULL); | |
424 | } | |
425 | else if (key_len == 3 && strncasecmp( key, "sat", key_len ) == 0 && value != NULL) | |
426 | { | |
427 | line_sat = atoi(value); | |
428 | } | |
429 | else if (key_len == 3 && strncasecmp( key, "fix", key_len ) == 0 && value != NULL) | |
430 | { | |
431 | line_fix = atoi(value); | |
432 | } | |
433 | } | |
434 | ||
435 | static void a_gpspoint_write_waypoint ( const gchar *name, VikWaypoint *wp, FILE *f ) | |
436 | { | |
437 | static struct LatLon ll; | |
438 | gchar *s_lat, *s_lon; | |
439 | vik_coord_to_latlon ( &(wp->coord), &ll ); | |
440 | s_lat = a_coords_dtostr(ll.lat); | |
441 | s_lon = a_coords_dtostr(ll.lon); | |
442 | fprintf ( f, "type=\"waypoint\" latitude=\"%s\" longitude=\"%s\" name=\"%s\"", s_lat, s_lon, name ); | |
443 | g_free ( s_lat ); | |
444 | g_free ( s_lon ); | |
445 | ||
446 | if ( wp->altitude != VIK_DEFAULT_ALTITUDE ) { | |
447 | gchar *s_alt = a_coords_dtostr(wp->altitude); | |
448 | fprintf ( f, " altitude=\"%s\"", s_alt ); | |
449 | g_free(s_alt); | |
450 | } | |
451 | if ( wp->comment ) | |
452 | { | |
453 | gchar *tmp_comment = slashdup(wp->comment); | |
454 | fprintf ( f, " comment=\"%s\"", tmp_comment ); | |
455 | g_free ( tmp_comment ); | |
456 | } | |
457 | if ( wp->image ) | |
458 | { | |
459 | gchar *tmp_image = slashdup(wp->image); | |
460 | fprintf ( f, " image=\"%s\"", tmp_image ); | |
461 | g_free ( tmp_image ); | |
462 | } | |
463 | if ( wp->symbol ) | |
464 | { | |
465 | fprintf ( f, " symbol=\"%s\"", wp->symbol ); | |
466 | } | |
467 | if ( ! wp->visible ) | |
468 | fprintf ( f, " visible=\"n\"" ); | |
469 | fprintf ( f, "\n" ); | |
470 | } | |
471 | ||
472 | static void a_gpspoint_write_trackpoint ( VikTrackpoint *tp, FILE *f ) | |
473 | { | |
474 | static struct LatLon ll; | |
475 | gchar *s_lat, *s_lon; | |
476 | vik_coord_to_latlon ( &(tp->coord), &ll ); | |
477 | ||
478 | /* TODO: modify a_coords_dtostr() to accept (optional) buffer | |
479 | * instead of doing malloc/free everytime */ | |
480 | s_lat = a_coords_dtostr(ll.lat); | |
481 | s_lon = a_coords_dtostr(ll.lon); | |
482 | fprintf ( f, "type=\"trackpoint\" latitude=\"%s\" longitude=\"%s\"", s_lat, s_lon ); | |
483 | g_free ( s_lat ); | |
484 | g_free ( s_lon ); | |
485 | ||
486 | if ( tp->altitude != VIK_DEFAULT_ALTITUDE ) { | |
487 | gchar *s_alt = a_coords_dtostr(tp->altitude); | |
488 | fprintf ( f, " altitude=\"%s\"", s_alt ); | |
489 | g_free(s_alt); | |
490 | } | |
491 | if ( tp->has_timestamp ) | |
492 | fprintf ( f, " unixtime=\"%ld\"", tp->timestamp ); | |
493 | if ( tp->newsegment ) | |
494 | fprintf ( f, " newsegment=\"yes\"" ); | |
495 | ||
496 | if (!isnan(tp->speed) || !isnan(tp->course) || tp->nsats > 0) { | |
497 | fprintf ( f, " extended=\"yes\"" ); | |
498 | if (!isnan(tp->speed)) { | |
499 | gchar *s_speed = a_coords_dtostr(tp->speed); | |
500 | fprintf ( f, " speed=\"%s\"", s_speed ); | |
501 | g_free(s_speed); | |
502 | } | |
503 | if (!isnan(tp->course)) { | |
504 | gchar *s_course = a_coords_dtostr(tp->course); | |
505 | fprintf ( f, " course=\"%s\"", s_course ); | |
506 | g_free(s_course); | |
507 | } | |
508 | if (tp->nsats > 0) | |
509 | fprintf ( f, " sat=\"%d\"", tp->nsats ); | |
510 | if (tp->fix_mode > 0) | |
511 | fprintf ( f, " fix=\"%d\"", tp->fix_mode ); | |
512 | } | |
513 | fprintf ( f, "\n" ); | |
514 | } | |
515 | ||
516 | ||
517 | static void a_gpspoint_write_track ( const gchar *name, VikTrack *t, FILE *f ) | |
518 | { | |
519 | if ( t->comment ) | |
520 | { | |
521 | gchar *tmp_comment = slashdup(t->comment); | |
522 | fprintf ( f, "type=\"track\" name=\"%s\" comment=\"%s\"%s\n", name, tmp_comment, t->visible ? "" : " visible=\"n\"" ); | |
523 | g_free ( tmp_comment ); | |
524 | } | |
525 | else | |
526 | fprintf ( f, "type=\"track\" name=\"%s\"%s\n", name, t->visible ? "" : " visible=\"n\"" ); | |
527 | g_list_foreach ( t->trackpoints, (GFunc) a_gpspoint_write_trackpoint, f ); | |
528 | fprintf ( f, "type=\"trackend\"\n" ); | |
529 | } | |
530 | ||
531 | void a_gpspoint_write_file ( VikTrwLayer *trw, FILE *f ) | |
532 | { | |
533 | GHashTable *tracks = vik_trw_layer_get_tracks ( trw ); | |
534 | GHashTable *waypoints = vik_trw_layer_get_waypoints ( trw ); | |
535 | ||
536 | fprintf ( f, "type=\"waypointlist\"\n" ); | |
537 | g_hash_table_foreach ( waypoints, (GHFunc) a_gpspoint_write_waypoint, f ); | |
538 | fprintf ( f, "type=\"waypointlistend\"\n" ); | |
539 | g_hash_table_foreach ( tracks, (GHFunc) a_gpspoint_write_track, f ); | |
540 | } |