Parent Directory | Revision Log
Quick'n dirty XML parser
1 | /* |
2 | * Copyright (C) 2008 Till Harbaum <till@harbaum.org>. |
3 | * |
4 | * This file is part of OSM2Go. |
5 | * |
6 | * OSM2Go 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 3 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * OSM2Go 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 OSM2Go. If not, see <http://www.gnu.org/licenses/>. |
18 | */ |
19 | |
20 | /* xml parsing has a performance issue */ |
21 | // #define OSM_DOM_PARSER |
22 | // #define OSM_STREAM_PARSER |
23 | #define OSM_QND_XML_PARSER |
24 | |
25 | #include <stdio.h> |
26 | #include <stdlib.h> |
27 | #include <string.h> |
28 | #include <math.h> |
29 | |
30 | #define __USE_XOPEN |
31 | #include <time.h> |
32 | |
33 | #include <libxml/parser.h> |
34 | #include <libxml/tree.h> |
35 | |
36 | #include "appdata.h" |
37 | #include "banner.h" |
38 | |
39 | #ifndef LIBXML_TREE_ENABLED |
40 | #error "Tree not enabled in libxml" |
41 | #endif |
42 | |
43 | /* determine where a node/way/relation read from the osm file */ |
44 | /* is inserted into the internal database */ |
45 | // #define OSM_SORT_ID |
46 | #define OSM_SORT_LAST |
47 | // #define OSM_SORT_FIRST |
48 | |
49 | /* ------------------------- bounds handling --------------------- */ |
50 | |
51 | static void osm_bounds_free(bounds_t *bounds) { |
52 | free(bounds); |
53 | } |
54 | |
55 | static void osm_bounds_dump(bounds_t *bounds) { |
56 | printf("\nBounds: %f->%f %f->%f\n", |
57 | bounds->ll_min.lat, bounds->ll_max.lat, |
58 | bounds->ll_min.lon, bounds->ll_max.lon); |
59 | } |
60 | |
61 | #ifdef OSM_DOM_PARSER |
62 | static bounds_t *osm_parse_osm_bounds(osm_t *osm, |
63 | xmlDocPtr doc, xmlNode *a_node) { |
64 | char *prop; |
65 | |
66 | if(osm->bounds) { |
67 | errorf(NULL, "Doubly defined bounds"); |
68 | return NULL; |
69 | } |
70 | |
71 | bounds_t *bounds = g_new0(bounds_t, 1); |
72 | |
73 | bounds->ll_min.lat = bounds->ll_min.lon = NAN; |
74 | bounds->ll_max.lat = bounds->ll_max.lon = NAN; |
75 | |
76 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"minlat"))) { |
77 | bounds->ll_min.lat = g_ascii_strtod(prop, NULL); |
78 | xmlFree(prop); |
79 | } |
80 | |
81 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"maxlat"))) { |
82 | bounds->ll_max.lat = g_ascii_strtod(prop, NULL); |
83 | xmlFree(prop); |
84 | } |
85 | |
86 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"minlon"))) { |
87 | bounds->ll_min.lon = g_ascii_strtod(prop, NULL); |
88 | xmlFree(prop); |
89 | } |
90 | |
91 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"maxlon"))) { |
92 | bounds->ll_max.lon = g_ascii_strtod(prop, NULL); |
93 | xmlFree(prop); |
94 | } |
95 | |
96 | if(isnan(bounds->ll_min.lat) || isnan(bounds->ll_min.lon) || |
97 | isnan(bounds->ll_max.lat) || isnan(bounds->ll_max.lon)) { |
98 | errorf(NULL, "Invalid coordinate in bounds (%f/%f/%f/%f)", |
99 | bounds->ll_min.lat, bounds->ll_min.lon, |
100 | bounds->ll_max.lat, bounds->ll_max.lon); |
101 | |
102 | osm_bounds_free(bounds); |
103 | return NULL; |
104 | } |
105 | |
106 | |
107 | /* calculate map zone which will be used as a reference for all */ |
108 | /* drawing/projection later on */ |
109 | pos_t center = { (bounds->ll_max.lat + bounds->ll_min.lat)/2, |
110 | (bounds->ll_max.lon + bounds->ll_min.lon)/2 }; |
111 | |
112 | pos2lpos_center(¢er, &bounds->center); |
113 | |
114 | /* the scale is needed to accomodate for "streching" */ |
115 | /* by the mercartor projection */ |
116 | bounds->scale = cos(DEG2RAD(center.lat)); |
117 | |
118 | pos2lpos_center(&bounds->ll_min, &bounds->min); |
119 | bounds->min.x -= bounds->center.x; |
120 | bounds->min.y -= bounds->center.y; |
121 | bounds->min.x *= bounds->scale; |
122 | bounds->min.y *= bounds->scale; |
123 | |
124 | pos2lpos_center(&bounds->ll_max, &bounds->max); |
125 | bounds->max.x -= bounds->center.x; |
126 | bounds->max.y -= bounds->center.y; |
127 | bounds->max.x *= bounds->scale; |
128 | bounds->max.y *= bounds->scale; |
129 | |
130 | return bounds; |
131 | } |
132 | #endif |
133 | |
134 | /* ------------------------- user handling --------------------- */ |
135 | |
136 | void osm_users_free(user_t *user) { |
137 | while(user) { |
138 | user_t *next = user->next; |
139 | |
140 | if(user->name) g_free(user->name); |
141 | g_free(user); |
142 | |
143 | user = next; |
144 | } |
145 | } |
146 | |
147 | void osm_users_dump(user_t *user) { |
148 | printf("\nUser list:\n"); |
149 | while(user) { |
150 | printf("Name: %s\n", user->name); |
151 | user = user->next; |
152 | } |
153 | } |
154 | |
155 | static user_t *osm_user(osm_t *osm, char *name) { |
156 | if(!name) return NULL; |
157 | |
158 | /* search through user list */ |
159 | user_t **user = &osm->user; |
160 | while(*user && strcasecmp((*user)->name, name) < 0) |
161 | user = &(*user)->next; |
162 | |
163 | /* end of list or inexact match? create new user entry! */ |
164 | if(!*user || strcasecmp((*user)->name, name)) { |
165 | user_t *new = g_new0(user_t, 1); |
166 | new->name = g_strdup(name); |
167 | new->next = *user; |
168 | *user = new; |
169 | |
170 | return new; |
171 | } |
172 | |
173 | return *user; |
174 | } |
175 | |
176 | static |
177 | time_t convert_iso8601(const char *str) { |
178 | if(!str) return 0; |
179 | |
180 | tzset(); |
181 | |
182 | struct tm ctime; |
183 | memset(&ctime, 0, sizeof(struct tm)); |
184 | strptime(str, "%FT%T%z", &ctime); |
185 | |
186 | return mktime(&ctime) - timezone; |
187 | } |
188 | |
189 | /* -------------------- tag handling ----------------------- */ |
190 | |
191 | void osm_tag_free(tag_t *tag) { |
192 | if(tag->key) g_free(tag->key); |
193 | if(tag->value) g_free(tag->value); |
194 | g_free(tag); |
195 | } |
196 | |
197 | void osm_tags_free(tag_t *tag) { |
198 | while(tag) { |
199 | tag_t *next = tag->next; |
200 | osm_tag_free(tag); |
201 | tag = next; |
202 | } |
203 | } |
204 | |
205 | static void osm_tags_dump(tag_t *tag) { |
206 | while(tag) { |
207 | printf("Key/Val: %s/%s\n", tag->key, tag->value); |
208 | tag = tag->next; |
209 | } |
210 | } |
211 | |
212 | tag_t *osm_parse_osm_tag(osm_t *osm, xmlDocPtr doc, xmlNode *a_node) { |
213 | xmlNode *cur_node = NULL; |
214 | |
215 | /* allocate a new tag structure */ |
216 | tag_t *tag = g_new0(tag_t, 1); |
217 | |
218 | char *prop; |
219 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"k"))) { |
220 | if(strlen(prop) > 0) tag->key = g_strdup(prop); |
221 | xmlFree(prop); |
222 | } |
223 | |
224 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"v"))) { |
225 | if(strlen(prop) > 0) tag->value = g_strdup(prop); |
226 | xmlFree(prop); |
227 | } |
228 | |
229 | if(!tag->key || !tag->value) { |
230 | printf("incomplete tag key/value %s/%s\n", tag->key, tag->value); |
231 | osm_tags_free(tag); |
232 | return NULL; |
233 | } |
234 | |
235 | for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) |
236 | if (cur_node->type == XML_ELEMENT_NODE) |
237 | printf("found unhandled osm/node/tag/%s\n", cur_node->name); |
238 | |
239 | return tag; |
240 | } |
241 | |
242 | gboolean osm_is_creator_tag(tag_t *tag) { |
243 | if(strcasecmp(tag->key, "created_by") == 0) return TRUE; |
244 | if(strcasecmp(tag->key, "source") == 0) return TRUE; |
245 | |
246 | return FALSE; |
247 | } |
248 | |
249 | gboolean osm_tag_key_and_value_present(tag_t *haystack, tag_t *tag) { |
250 | while(haystack) { |
251 | if((strcasecmp(haystack->key, tag->key) == 0) && |
252 | (strcasecmp(haystack->value, tag->value) == 0)) |
253 | return TRUE; |
254 | |
255 | haystack = haystack->next; |
256 | } |
257 | return FALSE; |
258 | } |
259 | |
260 | gboolean osm_tag_key_other_value_present(tag_t *haystack, tag_t *tag) { |
261 | while(haystack) { |
262 | if((strcasecmp(haystack->key, tag->key) == 0) && |
263 | (strcasecmp(haystack->value, tag->value) != 0)) |
264 | return TRUE; |
265 | |
266 | haystack = haystack->next; |
267 | } |
268 | return FALSE; |
269 | } |
270 | |
271 | gboolean osm_way_ends_with_node(way_t *way, node_t *node) { |
272 | /* and deleted way may even not contain any nodes at all */ |
273 | /* so ignore it */ |
274 | if(way->flags & OSM_FLAG_DELETED) |
275 | return FALSE; |
276 | |
277 | /* any valid way must have at least two nodes */ |
278 | g_assert(way->node_chain && way->node_chain->next); |
279 | |
280 | node_chain_t *chain = way->node_chain; |
281 | if(chain->node == node) return TRUE; |
282 | |
283 | while(chain->next) chain = chain->next; |
284 | if(chain->node == node) return TRUE; |
285 | |
286 | return FALSE; |
287 | } |
288 | |
289 | /* ------------------- node handling ------------------- */ |
290 | |
291 | void osm_node_free(icon_t **icon, node_t *node) { |
292 | if(node->icon_buf) |
293 | icon_free(icon, node->icon_buf); |
294 | |
295 | /* there must not be anything left in this chain */ |
296 | g_assert(!node->map_item_chain); |
297 | |
298 | osm_tags_free(node->tag); |
299 | g_free(node); |
300 | } |
301 | |
302 | static void osm_nodes_free(icon_t **icon, node_t *node) { |
303 | while(node) { |
304 | node_t *next = node->next; |
305 | osm_node_free(icon, node); |
306 | node = next; |
307 | } |
308 | } |
309 | |
310 | void osm_node_dump(node_t *node) { |
311 | char buf[64]; |
312 | struct tm tm; |
313 | |
314 | printf("Id: %lu\n", node->id); |
315 | printf("User: %s\n", node->user?node->user->name:"<unspecified>"); |
316 | printf("Visible: %s\n", node->visible?"yes":"no"); |
317 | |
318 | localtime_r(&node->time, &tm); |
319 | strftime(buf, sizeof(buf), "%a, %d %b %Y %H:%M:%S %Z", &tm); |
320 | printf("Time: %s\n", buf); |
321 | osm_tags_dump(node->tag); |
322 | } |
323 | |
324 | void osm_nodes_dump(node_t *node) { |
325 | printf("\nNode list:\n"); |
326 | while(node) { |
327 | osm_node_dump(node); |
328 | printf("\n"); |
329 | node = node->next; |
330 | } |
331 | } |
332 | |
333 | #ifdef OSM_DOM_PARSER |
334 | static node_t *osm_parse_osm_node(osm_t *osm, |
335 | xmlDocPtr doc, xmlNode *a_node) { |
336 | xmlNode *cur_node = NULL; |
337 | |
338 | /* allocate a new node structure */ |
339 | node_t *node = g_new0(node_t, 1); |
340 | node->pos.lat = node->pos.lon = NAN; |
341 | |
342 | char *prop; |
343 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"id"))) { |
344 | node->id = strtoul(prop, NULL, 10); |
345 | xmlFree(prop); |
346 | } |
347 | |
348 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"lat"))) { |
349 | node->pos.lat = g_ascii_strtod(prop, NULL); |
350 | xmlFree(prop); |
351 | } |
352 | |
353 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"lon"))) { |
354 | node->pos.lon = g_ascii_strtod(prop, NULL); |
355 | xmlFree(prop); |
356 | } |
357 | |
358 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"user"))) { |
359 | node->user = osm_user(osm, prop); |
360 | xmlFree(prop); |
361 | } |
362 | |
363 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"visible"))) { |
364 | node->visible = (strcasecmp(prop, "true") == 0); |
365 | xmlFree(prop); |
366 | } |
367 | |
368 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"timestamp"))) { |
369 | node->time = convert_iso8601(prop); |
370 | xmlFree(prop); |
371 | } |
372 | |
373 | /* scan for tags and attach a list of tags */ |
374 | tag_t **tag = &node->tag; |
375 | for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) { |
376 | if (cur_node->type == XML_ELEMENT_NODE) { |
377 | if(strcasecmp((char*)cur_node->name, "tag") == 0) { |
378 | /* attach tag to node */ |
379 | *tag = osm_parse_osm_tag(osm, doc, cur_node); |
380 | if(*tag) tag = &((*tag)->next); |
381 | } else |
382 | printf("found unhandled osm/node/%s\n", cur_node->name); |
383 | } |
384 | } |
385 | |
386 | pos2lpos(osm->bounds, &node->pos, &node->lpos); |
387 | |
388 | return node; |
389 | } |
390 | #endif |
391 | |
392 | /* ------------------- way handling ------------------- */ |
393 | |
394 | void osm_node_chain_free(node_chain_t *node_chain) { |
395 | while(node_chain) { |
396 | g_assert(node_chain->node->ways); |
397 | |
398 | node_chain_t *next = node_chain->next; |
399 | node_chain->node->ways--; |
400 | g_free(node_chain); |
401 | node_chain = next; |
402 | } |
403 | } |
404 | |
405 | void osm_way_free(way_t *way) { |
406 | // printf("freeing way #%ld\n", way->id); |
407 | |
408 | osm_node_chain_free(way->node_chain); |
409 | osm_tags_free(way->tag); |
410 | |
411 | /* there must not be anything left in this chain */ |
412 | g_assert(!way->map_item_chain); |
413 | |
414 | g_free(way); |
415 | } |
416 | |
417 | static void osm_ways_free(way_t *way) { |
418 | while(way) { |
419 | way_t *next = way->next; |
420 | osm_way_free(way); |
421 | way = next; |
422 | } |
423 | } |
424 | |
425 | void osm_way_append_node(way_t *way, node_t *node) { |
426 | node_chain_t **node_chain = &way->node_chain; |
427 | |
428 | while(*node_chain) |
429 | node_chain = &((*node_chain)->next); |
430 | |
431 | *node_chain = g_new0(node_chain_t, 1); |
432 | (*node_chain)->node = node; |
433 | |
434 | node->ways++; |
435 | } |
436 | |
437 | int osm_node_chain_length(node_chain_t *node_chain) { |
438 | int cnt = 0; |
439 | while(node_chain) { |
440 | cnt++; |
441 | node_chain = node_chain->next; |
442 | } |
443 | |
444 | return cnt; |
445 | } |
446 | |
447 | void osm_way_dump(way_t *way) { |
448 | char buf[64]; |
449 | struct tm tm; |
450 | |
451 | printf("Id: %lu\n", way->id); |
452 | printf("User: %s\n", way->user?way->user->name:"<unspecified>"); |
453 | printf("Visible: %s\n", way->visible?"yes":"no"); |
454 | node_chain_t *node_chain = way->node_chain; |
455 | while(node_chain) { |
456 | printf(" Node: %lu\n", node_chain->node->id); |
457 | node_chain = node_chain->next; |
458 | } |
459 | |
460 | localtime_r(&way->time, &tm); |
461 | strftime(buf, sizeof(buf), "%a, %d %b %Y %H:%M:%S %Z", &tm); |
462 | printf("Time: %s\n", buf); |
463 | osm_tags_dump(way->tag); |
464 | } |
465 | |
466 | void osm_ways_dump(way_t *way) { |
467 | printf("\nWay list:\n"); |
468 | while(way) { |
469 | osm_way_dump(way); |
470 | printf("\n"); |
471 | way = way->next; |
472 | } |
473 | } |
474 | |
475 | node_chain_t *osm_parse_osm_way_nd(osm_t *osm, |
476 | xmlDocPtr doc, xmlNode *a_node) { |
477 | char *prop; |
478 | |
479 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"ref"))) { |
480 | item_id_t id = strtoul(prop, NULL, 10); |
481 | node_chain_t *node_chain = g_new0(node_chain_t, 1); |
482 | |
483 | /* search matching node */ |
484 | node_chain->node = osm->node; |
485 | while(node_chain->node && node_chain->node->id != id) |
486 | node_chain->node = node_chain->node->next; |
487 | |
488 | if(!node_chain->node) printf("Node id %lu not found\n", id); |
489 | |
490 | if(node_chain->node) |
491 | node_chain->node->ways++; |
492 | |
493 | xmlFree(prop); |
494 | |
495 | return node_chain; |
496 | } |
497 | |
498 | return NULL; |
499 | } |
500 | |
501 | #ifdef OSM_DOM_PARSER |
502 | static way_t *osm_parse_osm_way(osm_t *osm, |
503 | xmlDocPtr doc, xmlNode *a_node) { |
504 | xmlNode *cur_node = NULL; |
505 | |
506 | /* allocate a new way structure */ |
507 | way_t *way = g_new0(way_t, 1); |
508 | |
509 | char *prop; |
510 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"id"))) { |
511 | way->id = strtoul(prop, NULL, 10); |
512 | xmlFree(prop); |
513 | } |
514 | |
515 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"user"))) { |
516 | way->user = osm_user(osm, prop); |
517 | xmlFree(prop); |
518 | } |
519 | |
520 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"visible"))) { |
521 | way->visible = (strcasecmp(prop, "true") == 0); |
522 | xmlFree(prop); |
523 | } |
524 | |
525 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"timestamp"))) { |
526 | way->time = convert_iso8601(prop); |
527 | xmlFree(prop); |
528 | } |
529 | |
530 | /* scan for tags/nodes and attach their lists */ |
531 | tag_t **tag = &way->tag; |
532 | node_chain_t **node_chain = &way->node_chain; |
533 | |
534 | for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) { |
535 | if (cur_node->type == XML_ELEMENT_NODE) { |
536 | if(strcasecmp((char*)cur_node->name, "tag") == 0) { |
537 | /* attach tag to node */ |
538 | *tag = osm_parse_osm_tag(osm, doc, cur_node); |
539 | if(*tag) tag = &((*tag)->next); |
540 | } else if(strcasecmp((char*)cur_node->name, "nd") == 0) { |
541 | *node_chain = osm_parse_osm_way_nd(osm, doc, cur_node); |
542 | if(*node_chain) |
543 | node_chain = &((*node_chain)->next); |
544 | } else |
545 | printf("found unhandled osm/node/%s\n", cur_node->name); |
546 | } |
547 | } |
548 | |
549 | return way; |
550 | } |
551 | #endif |
552 | |
553 | /* ------------------- relation handling ------------------- */ |
554 | |
555 | void osm_member_free(member_t *member) { |
556 | if(member->role) g_free(member->role); |
557 | g_free(member); |
558 | } |
559 | |
560 | void osm_members_free(member_t *member) { |
561 | while(member) { |
562 | member_t *next = member->next; |
563 | osm_member_free(member); |
564 | member = next; |
565 | } |
566 | } |
567 | |
568 | static void osm_relations_free(relation_t *relation) { |
569 | while(relation) { |
570 | relation_t *next = relation->next; |
571 | |
572 | osm_tags_free(relation->tag); |
573 | osm_members_free(relation->member); |
574 | |
575 | g_free(relation); |
576 | relation = next; |
577 | } |
578 | } |
579 | |
580 | void osm_relations_dump(relation_t *relation) { |
581 | printf("\nRelation list:\n"); |
582 | while(relation) { |
583 | char buf[64]; |
584 | struct tm tm; |
585 | |
586 | printf("Id: %lu\n", relation->id); |
587 | printf("User: %s\n", |
588 | relation->user?relation->user->name:"<unspecified>"); |
589 | printf("Visible: %s\n", relation->visible?"yes":"no"); |
590 | |
591 | member_t *member = relation->member; |
592 | while(member) { |
593 | switch(member->type) { |
594 | case ILLEGAL: |
595 | case NODE_ID: |
596 | case WAY_ID: |
597 | case RELATION_ID: |
598 | break; |
599 | |
600 | case NODE: |
601 | if(member->node) |
602 | printf(" Member: Node, id = %lu, role = %s\n", |
603 | member->node->id, member->role); |
604 | break; |
605 | |
606 | case WAY: |
607 | if(member->way) |
608 | printf(" Member: Way, id = %lu, role = %s\n", |
609 | member->way->id, member->role); |
610 | break; |
611 | |
612 | case RELATION: |
613 | if(member->relation) |
614 | printf(" Member: Relation, id = %lu, role = %s\n", |
615 | member->relation->id, member->role); |
616 | break; |
617 | } |
618 | |
619 | member = member->next; |
620 | } |
621 | |
622 | localtime_r(&relation->time, &tm); |
623 | strftime(buf, sizeof(buf), "%a, %d %b %Y %H:%M:%S %Z", &tm); |
624 | printf("Time: %s\n", buf); |
625 | osm_tags_dump(relation->tag); |
626 | |
627 | printf("\n"); |
628 | relation = relation->next; |
629 | } |
630 | } |
631 | |
632 | member_t *osm_parse_osm_relation_member(osm_t *osm, |
633 | xmlDocPtr doc, xmlNode *a_node) { |
634 | char *prop; |
635 | member_t *member = g_new0(member_t, 1); |
636 | member->type = ILLEGAL; |
637 | |
638 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"type"))) { |
639 | if(strcasecmp(prop, "way") == 0) member->type = WAY; |
640 | else if(strcasecmp(prop, "node") == 0) member->type = NODE; |
641 | else if(strcasecmp(prop, "relation") == 0) member->type = RELATION; |
642 | xmlFree(prop); |
643 | } |
644 | |
645 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"ref"))) { |
646 | item_id_t id = strtoul(prop, NULL, 10); |
647 | |
648 | switch(member->type) { |
649 | case ILLEGAL: |
650 | printf("Unable to store illegal type\n"); |
651 | break; |
652 | |
653 | case WAY: |
654 | /* search matching way */ |
655 | member->way = osm->way; |
656 | while(member->way && member->way->id != id) |
657 | member->way = member->way->next; |
658 | |
659 | if(!member->way) { |
660 | member->type = WAY_ID; |
661 | member->id = id; |
662 | } |
663 | break; |
664 | |
665 | case NODE: |
666 | /* search matching node */ |
667 | member->node = osm->node; |
668 | while(member->node && member->node->id != id) |
669 | member->node = member->node->next; |
670 | |
671 | if(!member->node) { |
672 | member->type = NODE_ID; |
673 | member->id = id; |
674 | } |
675 | break; |
676 | |
677 | case RELATION: |
678 | /* search matching relation */ |
679 | member->relation = osm->relation; |
680 | while(member->relation && member->relation->id != id) |
681 | member->relation = member->relation->next; |
682 | |
683 | if(!member->relation) { |
684 | member->type = NODE_ID; |
685 | member->id = id; |
686 | } |
687 | break; |
688 | |
689 | case WAY_ID: |
690 | case NODE_ID: |
691 | case RELATION_ID: |
692 | break; |
693 | } |
694 | |
695 | xmlFree(prop); |
696 | } |
697 | |
698 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"role"))) { |
699 | if(strlen(prop) > 0) member->role = g_strdup(prop); |
700 | xmlFree(prop); |
701 | } |
702 | |
703 | return member; |
704 | } |
705 | |
706 | #ifdef OSM_DOM_PARSER |
707 | static relation_t *osm_parse_osm_relation(osm_t *osm, |
708 | xmlDocPtr doc, xmlNode *a_node) { |
709 | xmlNode *cur_node = NULL; |
710 | |
711 | /* allocate a new relation structure */ |
712 | relation_t *relation = g_new0(relation_t, 1); |
713 | |
714 | char *prop; |
715 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"id"))) { |
716 | relation->id = strtoul(prop, NULL, 10); |
717 | xmlFree(prop); |
718 | } |
719 | |
720 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"user"))) { |
721 | relation->user = osm_user(osm, prop); |
722 | xmlFree(prop); |
723 | } |
724 | |
725 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"visible"))) { |
726 | relation->visible = (strcasecmp(prop, "true") == 0); |
727 | xmlFree(prop); |
728 | } |
729 | |
730 | if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"timestamp"))) { |
731 | relation->time = convert_iso8601(prop); |
732 | xmlFree(prop); |
733 | } |
734 | |
735 | /* scan for tags and attach a list of tags */ |
736 | tag_t **tag = &relation->tag; |
737 | member_t **member = &relation->member; |
738 | |
739 | for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) { |
740 | if (cur_node->type == XML_ELEMENT_NODE) { |
741 | if(strcasecmp((char*)cur_node->name, "tag") == 0) { |
742 | /* attach tag to node */ |
743 | *tag = osm_parse_osm_tag(osm, doc, cur_node); |
744 | if(*tag) tag = &((*tag)->next); |
745 | } else if(strcasecmp((char*)cur_node->name, "member") == 0) { |
746 | *member = osm_parse_osm_relation_member(osm, doc, cur_node); |
747 | if(*member) member = &((*member)->next); |
748 | } else |
749 | printf("found unhandled osm/node/%s\n", cur_node->name); |
750 | } |
751 | } |
752 | |
753 | return relation; |
754 | } |
755 | |
756 | /* ----------------------- generic xml handling -------------------------- */ |
757 | |
758 | /* parse loc entry */ |
759 | static void osm_parse_osm(osm_t *osm, xmlDocPtr doc, xmlNode * a_node) { |
760 | xmlNode *cur_node = NULL; |
761 | |
762 | for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) { |
763 | if (cur_node->type == XML_ELEMENT_NODE) { |
764 | if(strcasecmp((char*)cur_node->name, "bounds") == 0) |
765 | osm->bounds = osm_parse_osm_bounds(osm, doc, cur_node); |
766 | else if(strcasecmp((char*)cur_node->name, "node") == 0) { |
767 | /* parse node and attach it to chain */ |
768 | node_t *new = osm_parse_osm_node(osm, doc, cur_node); |
769 | if(new) { |
770 | node_t **node = &osm->node; |
771 | |
772 | #ifdef OSM_SORT_ID |
773 | /* search chain of nodes */ |
774 | while(*node && ((*node)->id < new->id)) |
775 | node = &(*node)->next; |
776 | #endif |
777 | |
778 | #ifdef OSM_SORT_LAST |
779 | while(*node) node = &(*node)->next; |
780 | #endif |
781 | |
782 | /* insert into chain */ |
783 | new->next = *node; |
784 | *node = new; |
785 | } |
786 | } else if(strcasecmp((char*)cur_node->name, "way") == 0) { |
787 | /* parse way and attach it to chain */ |
788 | way_t *new = osm_parse_osm_way(osm, doc, cur_node); |
789 | if(new) { |
790 | way_t **way = &osm->way; |
791 | |
792 | #ifdef OSM_SORT_ID |
793 | /* insert into chain */ |
794 | while(*way && ((*way)->id < new->id)) |
795 | way = &(*way)->next; |
796 | #endif |
797 | |
798 | #ifdef OSM_SORT_LAST |
799 | while(*way) way = &(*way)->next; |
800 | #endif |
801 | |
802 | /* insert into chain */ |
803 | new->next = *way; |
804 | *way = new; |
805 | } |
806 | } else if(strcasecmp((char*)cur_node->name, "relation") == 0) { |
807 | /* parse relation and attach it to chain */ |
808 | relation_t *new = osm_parse_osm_relation(osm, doc, cur_node); |
809 | if(new) { |
810 | relation_t **relation = &osm->relation; |
811 | |
812 | #ifdef OSM_SORT_ID |
813 | /* search chain of ways */ |
814 | while(*relation && ((*relation)->id < new->id)) |
815 | relation = &(*relation)->next; |
816 | #endif |
817 | |
818 | #ifdef OSM_SORT_LAST |
819 | while(*relation) relation = &(*relation)->next; |
820 | #endif |
821 | |
822 | /* insert into chain */ |
823 | new->next = *relation; |
824 | *relation = new; |
825 | } |
826 | } else |
827 | printf("found unhandled osm/%s\n", cur_node->name); |
828 | |
829 | } |
830 | } |
831 | } |
832 | |
833 | /* parse root element and search for "osm" */ |
834 | static osm_t *osm_parse_root(xmlDocPtr doc, xmlNode * a_node) { |
835 | osm_t *osm; |
836 | xmlNode *cur_node = NULL; |
837 | |
838 | /* allocate memory to hold osm file description */ |
839 | osm = g_new0(osm_t, 1); |
840 | |
841 | for (cur_node = a_node; cur_node; cur_node = cur_node->next) { |
842 | if (cur_node->type == XML_ELEMENT_NODE) { |
843 | /* parse osm osm file ... */ |
844 | if(strcasecmp((char*)cur_node->name, "osm") == 0) |
845 | osm_parse_osm(osm, doc, cur_node); |
846 | else |
847 | printf("found unhandled %s\n", cur_node->name); |
848 | } |
849 | } |
850 | |
851 | return osm; |
852 | } |
853 | |
854 | static osm_t *osm_parse_doc(xmlDocPtr doc) { |
855 | osm_t *osm; |
856 | |
857 | /* Get the root element node */ |
858 | xmlNode *root_element = xmlDocGetRootElement(doc); |
859 | |
860 | osm = osm_parse_root(doc, root_element); |
861 | |
862 | /*free the document */ |
863 | xmlFreeDoc(doc); |
864 | |
865 | /* |
866 | * Free the global variables that may |
867 | * have been allocated by the parser. |
868 | */ |
869 | xmlCleanupParser(); |
870 | |
871 | return osm; |
872 | } |
873 | #endif |
874 | |
875 | /* ------------------ osm handling ----------------- */ |
876 | |
877 | void osm_free(icon_t **icon, osm_t *osm) { |
878 | if(!osm) return; |
879 | |
880 | if(osm->bounds) osm_bounds_free(osm->bounds); |
881 | if(osm->user) osm_users_free(osm->user); |
882 | if(osm->way) osm_ways_free(osm->way); |
883 | if(osm->node) osm_nodes_free(icon, osm->node); |
884 | if(osm->relation) osm_relations_free(osm->relation); |
885 | g_free(osm); |
886 | } |
887 | |
888 | void osm_dump(osm_t *osm) { |
889 | osm_bounds_dump(osm->bounds); |
890 | osm_users_dump(osm->user); |
891 | osm_nodes_dump(osm->node); |
892 | osm_ways_dump(osm->way); |
893 | osm_relations_dump(osm->relation); |
894 | } |
895 | |
896 | #ifdef OSM_STREAM_PARSER |
897 | /* -------------------------- stream parser tests ------------------- */ |
898 | |
899 | #include <libxml/xmlreader.h> |
900 | |
901 | static gint my_strcmp(const xmlChar *a, const xmlChar *b) { |
902 | if(!a && !b) return 0; |
903 | if(!a) return -1; |
904 | if(!b) return +1; |
905 | return strcmp((char*)a,(char*)b); |
906 | } |
907 | |
908 | /* skip current element incl. everything below (mainly for testing) */ |
909 | /* returns FALSE if something failed */ |
910 | static gboolean skip_element(xmlTextReaderPtr reader) { |
911 | g_assert(xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT); |
912 | const xmlChar *name = xmlTextReaderConstName(reader); |
913 | g_assert(name); |
914 | int depth = xmlTextReaderDepth(reader); |
915 | |
916 | if(xmlTextReaderIsEmptyElement(reader)) |
917 | return TRUE; |
918 | |
919 | int ret = xmlTextReaderRead(reader); |
920 | while((ret == 1) && |
921 | ((xmlTextReaderNodeType(reader) != XML_READER_TYPE_END_ELEMENT) || |
922 | (xmlTextReaderDepth(reader) > depth) || |
923 | (my_strcmp(xmlTextReaderConstName(reader), name) != 0))) { |
924 | ret = xmlTextReaderRead(reader); |
925 | } |
926 | return(ret == 1); |
927 | } |
928 | |
929 | /* parse bounds */ |
930 | static bounds_t *process_bounds(xmlTextReaderPtr reader) { |
931 | char *prop = NULL; |
932 | bounds_t *bounds = g_new0(bounds_t, 1); |
933 | |
934 | bounds->ll_min.lat = bounds->ll_min.lon = NAN; |
935 | bounds->ll_max.lat = bounds->ll_max.lon = NAN; |
936 | |
937 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "minlat"))) { |
938 | bounds->ll_min.lat = g_ascii_strtod(prop, NULL); |
939 | xmlFree(prop); |
940 | } |
941 | |
942 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "maxlat"))) { |
943 | bounds->ll_max.lat = g_ascii_strtod(prop, NULL); |
944 | xmlFree(prop); |
945 | } |
946 | |
947 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "minlon"))) { |
948 | bounds->ll_min.lon = g_ascii_strtod(prop, NULL); |
949 | xmlFree(prop); |
950 | } |
951 | |
952 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "maxlon"))) { |
953 | bounds->ll_max.lon = g_ascii_strtod(prop, NULL); |
954 | xmlFree(prop); |
955 | } |
956 | |
957 | if(isnan(bounds->ll_min.lat) || isnan(bounds->ll_min.lon) || |
958 | isnan(bounds->ll_max.lat) || isnan(bounds->ll_max.lon)) { |
959 | errorf(NULL, "Invalid coordinate in bounds (%f/%f/%f/%f)", |
960 | bounds->ll_min.lat, bounds->ll_min.lon, |
961 | bounds->ll_max.lat, bounds->ll_max.lon); |
962 | |
963 | osm_bounds_free(bounds); |
964 | return NULL; |
965 | } |
966 | |
967 | /* skip everything below */ |
968 | skip_element(reader); |
969 | |
970 | /* calculate map zone which will be used as a reference for all */ |
971 | /* drawing/projection later on */ |
972 | pos_t center = { (bounds->ll_max.lat + bounds->ll_min.lat)/2, |
973 | (bounds->ll_max.lon + bounds->ll_min.lon)/2 }; |
974 | |
975 | pos2lpos_center(¢er, &bounds->center); |
976 | |
977 | /* the scale is needed to accomodate for "streching" */ |
978 | /* by the mercartor projection */ |
979 | bounds->scale = cos(DEG2RAD(center.lat)); |
980 | |
981 | pos2lpos_center(&bounds->ll_min, &bounds->min); |
982 | bounds->min.x -= bounds->center.x; |
983 | bounds->min.y -= bounds->center.y; |
984 | bounds->min.x *= bounds->scale; |
985 | bounds->min.y *= bounds->scale; |
986 | |
987 | pos2lpos_center(&bounds->ll_max, &bounds->max); |
988 | bounds->max.x -= bounds->center.x; |
989 | bounds->max.y -= bounds->center.y; |
990 | bounds->max.x *= bounds->scale; |
991 | bounds->max.y *= bounds->scale; |
992 | |
993 | return bounds; |
994 | } |
995 | |
996 | static tag_t *process_tag(xmlTextReaderPtr reader) { |
997 | /* allocate a new tag structure */ |
998 | tag_t *tag = g_new0(tag_t, 1); |
999 | |
1000 | char *prop; |
1001 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "k"))) { |
1002 | if(strlen(prop) > 0) tag->key = g_strdup(prop); |
1003 | xmlFree(prop); |
1004 | } |
1005 | |
1006 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "v"))) { |
1007 | if(strlen(prop) > 0) tag->value = g_strdup(prop); |
1008 | xmlFree(prop); |
1009 | } |
1010 | |
1011 | if(!tag->key || !tag->value) { |
1012 | printf("incomplete tag key/value %s/%s\n", tag->key, tag->value); |
1013 | osm_tags_free(tag); |
1014 | tag = NULL; |
1015 | } |
1016 | |
1017 | skip_element(reader); |
1018 | return tag; |
1019 | } |
1020 | |
1021 | static node_t *process_node(xmlTextReaderPtr reader, osm_t *osm) { |
1022 | |
1023 | /* allocate a new node structure */ |
1024 | node_t *node = g_new0(node_t, 1); |
1025 | node->pos.lat = node->pos.lon = NAN; |
1026 | |
1027 | char *prop; |
1028 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "id"))) { |
1029 | node->id = strtoul(prop, NULL, 10); |
1030 | xmlFree(prop); |
1031 | } |
1032 | |
1033 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "lat"))) { |
1034 | node->pos.lat = g_ascii_strtod(prop, NULL); |
1035 | xmlFree(prop); |
1036 | } |
1037 | |
1038 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "lon"))) { |
1039 | node->pos.lon = g_ascii_strtod(prop, NULL); |
1040 | xmlFree(prop); |
1041 | } |
1042 | |
1043 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "user"))) { |
1044 | node->user = osm_user(osm, prop); |
1045 | xmlFree(prop); |
1046 | } |
1047 | |
1048 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "visible"))) { |
1049 | node->visible = (strcasecmp(prop, "true") == 0); |
1050 | xmlFree(prop); |
1051 | } |
1052 | |
1053 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "timestamp"))) { |
1054 | node->time = convert_iso8601(prop); |
1055 | xmlFree(prop); |
1056 | } |
1057 | |
1058 | pos2lpos(osm->bounds, &node->pos, &node->lpos); |
1059 | |
1060 | /* just an empty element? then return the node as it is */ |
1061 | if(xmlTextReaderIsEmptyElement(reader)) |
1062 | return node; |
1063 | |
1064 | /* parse tags if present */ |
1065 | int depth = xmlTextReaderDepth(reader); |
1066 | |
1067 | /* scan all elements on same level or its children */ |
1068 | tag_t **tag = &node->tag; |
1069 | int ret = xmlTextReaderRead(reader); |
1070 | while((ret == 1) && |
1071 | ((xmlTextReaderNodeType(reader) != XML_READER_TYPE_END_ELEMENT) || |
1072 | (xmlTextReaderDepth(reader) != depth))) { |
1073 | |
1074 | if(xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) { |
1075 | char *subname = (char*)xmlTextReaderConstName(reader); |
1076 | if(strcasecmp(subname, "tag") == 0) { |
1077 | *tag = process_tag(reader); |
1078 | if(*tag) tag = &(*tag)->next; |
1079 | } else |
1080 | skip_element(reader); |
1081 | } |
1082 | |
1083 | ret = xmlTextReaderRead(reader); |
1084 | } |
1085 | |
1086 | return node; |
1087 | } |
1088 | |
1089 | static node_chain_t *process_nd(xmlTextReaderPtr reader, osm_t *osm) { |
1090 | char *prop; |
1091 | |
1092 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "ref"))) { |
1093 | item_id_t id = strtoul(prop, NULL, 10); |
1094 | node_chain_t *node_chain = g_new0(node_chain_t, 1); |
1095 | |
1096 | /* search matching node */ |
1097 | node_chain->node = osm->node; |
1098 | while(node_chain->node && node_chain->node->id != id) |
1099 | node_chain->node = node_chain->node->next; |
1100 | |
1101 | if(!node_chain->node) printf("Node id %lu not found\n", id); |
1102 | |
1103 | if(node_chain->node) |
1104 | node_chain->node->ways++; |
1105 | |
1106 | xmlFree(prop); |
1107 | |
1108 | skip_element(reader); |
1109 | return node_chain; |
1110 | } |
1111 | |
1112 | skip_element(reader); |
1113 | return NULL; |
1114 | } |
1115 | |
1116 | static way_t *process_way(xmlTextReaderPtr reader, osm_t *osm) { |
1117 | /* allocate a new way structure */ |
1118 | way_t *way = g_new0(way_t, 1); |
1119 | |
1120 | char *prop; |
1121 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "id"))) { |
1122 | way->id = strtoul(prop, NULL, 10); |
1123 | xmlFree(prop); |
1124 | } |
1125 | |
1126 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "user"))) { |
1127 | way->user = osm_user(osm, prop); |
1128 | xmlFree(prop); |
1129 | } |
1130 | |
1131 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "visible"))) { |
1132 | way->visible = (strcasecmp(prop, "true") == 0); |
1133 | xmlFree(prop); |
1134 | } |
1135 | |
1136 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "timestamp"))) { |
1137 | way->time = convert_iso8601(prop); |
1138 | xmlFree(prop); |
1139 | } |
1140 | |
1141 | /* just an empty element? then return the way as it is */ |
1142 | /* (this should in fact never happen as this would be a way without nodes) */ |
1143 | if(xmlTextReaderIsEmptyElement(reader)) |
1144 | return way; |
1145 | |
1146 | /* parse tags/nodes if present */ |
1147 | int depth = xmlTextReaderDepth(reader); |
1148 | |
1149 | /* scan all elements on same level or its children */ |
1150 | tag_t **tag = &way->tag; |
1151 | node_chain_t **node_chain = &way->node_chain; |
1152 | int ret = xmlTextReaderRead(reader); |
1153 | while((ret == 1) && |
1154 | ((xmlTextReaderNodeType(reader) != XML_READER_TYPE_END_ELEMENT) || |
1155 | (xmlTextReaderDepth(reader) != depth))) { |
1156 | |
1157 | if(xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) { |
1158 | char *subname = (char*)xmlTextReaderConstName(reader); |
1159 | if(strcasecmp(subname, "nd") == 0) { |
1160 | *node_chain = process_nd(reader, osm); |
1161 | if(*node_chain) node_chain = &(*node_chain)->next; |
1162 | } else if(strcasecmp(subname, "tag") == 0) { |
1163 | *tag = process_tag(reader); |
1164 | if(*tag) tag = &(*tag)->next; |
1165 | } else |
1166 | skip_element(reader); |
1167 | } |
1168 | ret = xmlTextReaderRead(reader); |
1169 | } |
1170 | |
1171 | return way; |
1172 | } |
1173 | |
1174 | static member_t *process_member(xmlTextReaderPtr reader, osm_t *osm) { |
1175 | char *prop; |
1176 | member_t *member = g_new0(member_t, 1); |
1177 | member->type = ILLEGAL; |
1178 | |
1179 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "type"))) { |
1180 | if(strcasecmp(prop, "way") == 0) member->type = WAY; |
1181 | else if(strcasecmp(prop, "node") == 0) member->type = NODE; |
1182 | else if(strcasecmp(prop, "relation") == 0) member->type = RELATION; |
1183 | xmlFree(prop); |
1184 | } |
1185 | |
1186 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "ref"))) { |
1187 | item_id_t id = strtoul(prop, NULL, 10); |
1188 | |
1189 | switch(member->type) { |
1190 | case ILLEGAL: |
1191 | printf("Unable to store illegal type\n"); |
1192 | break; |
1193 | |
1194 | case WAY: |
1195 | /* search matching way */ |
1196 | member->way = osm->way; |
1197 | while(member->way && member->way->id != id) |
1198 | member->way = member->way->next; |
1199 | |
1200 | if(!member->way) { |
1201 | member->type = WAY_ID; |
1202 | member->id = id; |
1203 | } |
1204 | break; |
1205 | |
1206 | case NODE: |
1207 | /* search matching node */ |
1208 | member->node = osm->node; |
1209 | while(member->node && member->node->id != id) |
1210 | member->node = member->node->next; |
1211 | |
1212 | if(!member->node) { |
1213 | member->type = NODE_ID; |
1214 | member->id = id; |
1215 | } |
1216 | break; |
1217 | |
1218 | case RELATION: |
1219 | /* search matching relation */ |
1220 | member->relation = osm->relation; |
1221 | while(member->relation && member->relation->id != id) |
1222 | member->relation = member->relation->next; |
1223 | |
1224 | if(!member->relation) { |
1225 | member->type = NODE_ID; |
1226 | member->id = id; |
1227 | } |
1228 | break; |
1229 | |
1230 | case WAY_ID: |
1231 | case NODE_ID: |
1232 | case RELATION_ID: |
1233 | break; |
1234 | } |
1235 | |
1236 | xmlFree(prop); |
1237 | } |
1238 | |
1239 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "role"))) { |
1240 | if(strlen(prop) > 0) member->role = g_strdup(prop); |
1241 | xmlFree(prop); |
1242 | } |
1243 | |
1244 | return member; |
1245 | } |
1246 | |
1247 | static relation_t *process_relation(xmlTextReaderPtr reader, osm_t *osm) { |
1248 | /* allocate a new relation structure */ |
1249 | relation_t *relation = g_new0(relation_t, 1); |
1250 | |
1251 | char *prop; |
1252 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "id"))) { |
1253 | relation->id = strtoul(prop, NULL, 10); |
1254 | xmlFree(prop); |
1255 | } |
1256 | |
1257 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "user"))) { |
1258 | relation->user = osm_user(osm, prop); |
1259 | xmlFree(prop); |
1260 | } |
1261 | |
1262 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "visible"))) { |
1263 | relation->visible = (strcasecmp(prop, "true") == 0); |
1264 | xmlFree(prop); |
1265 | } |
1266 | |
1267 | if((prop = (char*)xmlTextReaderGetAttribute(reader, BAD_CAST "timestamp"))) { |
1268 | relation->time = convert_iso8601(prop); |
1269 | xmlFree(prop); |
1270 | } |
1271 | |
1272 | /* just an empty element? then return the relation as it is */ |
1273 | /* (this should in fact never happen as this would be a relation */ |
1274 | /* without members) */ |
1275 | if(xmlTextReaderIsEmptyElement(reader)) |
1276 | return relation; |
1277 | |
1278 | /* parse tags/member if present */ |
1279 | int depth = xmlTextReaderDepth(reader); |
1280 | |
1281 | /* scan all elements on same level or its children */ |
1282 | tag_t **tag = &relation->tag; |
1283 | member_t **member = &relation->member; |
1284 | int ret = xmlTextReaderRead(reader); |
1285 | while((ret == 1) && |
1286 | ((xmlTextReaderNodeType(reader) != XML_READER_TYPE_END_ELEMENT) || |
1287 | (xmlTextReaderDepth(reader) != depth))) { |
1288 | |
1289 | if(xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) { |
1290 | char *subname = (char*)xmlTextReaderConstName(reader); |
1291 | if(strcasecmp(subname, "member") == 0) { |
1292 | *member = process_member(reader, osm); |
1293 | if(*member) member = &(*member)->next; |
1294 | } else if(strcasecmp(subname, "tag") == 0) { |
1295 | *tag = process_tag(reader); |
1296 | if(*tag) tag = &(*tag)->next; |
1297 | } else |
1298 | skip_element(reader); |
1299 | } |
1300 | ret = xmlTextReaderRead(reader); |
1301 | } |
1302 | |
1303 | return relation; |
1304 | } |
1305 | |
1306 | static osm_t *process_osm(xmlTextReaderPtr reader) { |
1307 | /* alloc osm structure */ |
1308 | osm_t *osm = g_new0(osm_t, 1); |
1309 | |
1310 | node_t **node = &osm->node; |
1311 | way_t **way = &osm->way; |
1312 | relation_t **relation = &osm->relation; |
1313 | |
1314 | /* no attributes of interest */ |
1315 | |
1316 | const xmlChar *name = xmlTextReaderConstName(reader); |
1317 | g_assert(name); |
1318 | |
1319 | /* read next node */ |
1320 | int num_elems = 0; |
1321 | const int tick_every = 50; // Balance responsive appearance with performance. |
1322 | int ret = xmlTextReaderRead(reader); |
1323 | while(ret == 1) { |
1324 | |
1325 | switch(xmlTextReaderNodeType(reader)) { |
1326 | case XML_READER_TYPE_ELEMENT: |
1327 | |
1328 | g_assert(xmlTextReaderDepth(reader) == 1); |
1329 | char *name = (char*)xmlTextReaderConstName(reader); |
1330 | if(strcasecmp(name, "bounds") == 0) { |
1331 | osm->bounds = process_bounds(reader); |
1332 | } else if(strcasecmp(name, "node") == 0) { |
1333 | *node = process_node(reader, osm); |
1334 | if(*node) node = &(*node)->next; |
1335 | } else if(strcasecmp(name, "way") == 0) { |
1336 | *way = process_way(reader, osm); |
1337 | if(*way) way = &(*way)->next; |
1338 | } else if(strcasecmp(name, "relation") == 0) { |
1339 | *relation = process_relation(reader, osm); |
1340 | if(*relation) relation = &(*relation)->next; |
1341 | } else { |
1342 | printf("something unknown found\n"); |
1343 | g_assert(0); |
1344 | skip_element(reader); |
1345 | } |
1346 | break; |
1347 | |
1348 | case XML_READER_TYPE_END_ELEMENT: |
1349 | /* end element must be for the current element */ |
1350 | g_assert(xmlTextReaderDepth(reader) == 0); |
1351 | return osm; |
1352 | break; |
1353 | |
1354 | default: |
1355 | break; |
1356 | } |
1357 | ret = xmlTextReaderRead(reader); |
1358 | |
1359 | if (num_elems++ > tick_every) { |
1360 | num_elems = 0; |
1361 | banner_busy_tick(); |
1362 | } |
1363 | } |
1364 | |
1365 | g_assert(0); |
1366 | return NULL; |
1367 | } |
1368 | |
1369 | static osm_t *process_file(const char *filename) { |
1370 | osm_t *osm = NULL; |
1371 | xmlTextReaderPtr reader; |
1372 | int ret; |
1373 | |
1374 | reader = xmlReaderForFile(filename, NULL, 0); |
1375 | if (reader != NULL) { |
1376 | ret = xmlTextReaderRead(reader); |
1377 | if(ret == 1) { |
1378 | char *name = (char*)xmlTextReaderConstName(reader); |
1379 | if(name && strcasecmp(name, "osm") == 0) |
1380 | osm = process_osm(reader); |
1381 | } else |
1382 | printf("file empty\n"); |
1383 | |
1384 | xmlFreeTextReader(reader); |
1385 | } else { |
1386 | fprintf(stderr, "Unable to open %s\n", filename); |
1387 | } |
1388 | return osm; |
1389 | } |
1390 | |
1391 | /* ----------------------- end of stream parser tests ------------------- */ |
1392 | #endif |
1393 | |
1394 | #ifdef OSM_QND_XML_PARSER |
1395 | /* -------------------------- qnd-xml parser tests ------------------- */ |
1396 | |
1397 | gboolean osm_bounds_cb(qnd_xml_stack_t *stack, |
1398 | qnd_xml_attribute_t *attributes, gpointer data) { |
1399 | |
1400 | /* get parent pointer */ |
1401 | osm_t *osm = (osm_t*)stack->prev->userdata[0]; |
1402 | |
1403 | if(osm->bounds) { |
1404 | errorf(NULL, "Doubly defined bounds"); |
1405 | return FALSE; |
1406 | } |
1407 | |
1408 | bounds_t *bounds = osm->bounds = g_new0(bounds_t, 1); |
1409 | |
1410 | bounds->ll_min.lat = bounds->ll_min.lon = NAN; |
1411 | bounds->ll_max.lat = bounds->ll_max.lon = NAN; |
1412 | |
1413 | qnd_xml_get_prop_double(attributes, "minlat", &bounds->ll_min.lat); |
1414 | qnd_xml_get_prop_double(attributes, "minlon", &bounds->ll_min.lon); |
1415 | qnd_xml_get_prop_double(attributes, "maxlat", &bounds->ll_max.lat); |
1416 | qnd_xml_get_prop_double(attributes, "maxlon", &bounds->ll_max.lon); |
1417 | |
1418 | if(isnan(bounds->ll_min.lat) || isnan(bounds->ll_min.lon) || |
1419 | isnan(bounds->ll_max.lat) || isnan(bounds->ll_max.lon)) { |
1420 | errorf(NULL, "Invalid coordinate in bounds (%f/%f/%f/%f)", |
1421 | bounds->ll_min.lat, bounds->ll_min.lon, |
1422 | bounds->ll_max.lat, bounds->ll_max.lon); |
1423 | |
1424 | osm_bounds_free(bounds); |
1425 | osm->bounds = NULL; |
1426 | return FALSE; |
1427 | } |
1428 | |
1429 | |
1430 | /* calculate map zone which will be used as a reference for all */ |
1431 | /* drawing/projection later on */ |
1432 | pos_t center = { (bounds->ll_max.lat + bounds->ll_min.lat)/2, |
1433 | (bounds->ll_max.lon + bounds->ll_min.lon)/2 }; |
1434 | |
1435 | pos2lpos_center(¢er, &bounds->center); |
1436 | |
1437 | /* the scale is needed to accomodate for "streching" */ |
1438 | /* by the mercartor projection */ |
1439 | bounds->scale = cos(DEG2RAD(center.lat)); |
1440 | |
1441 | pos2lpos_center(&bounds->ll_min, &bounds->min); |
1442 | bounds->min.x -= bounds->center.x; |
1443 | bounds->min.y -= bounds->center.y; |
1444 | bounds->min.x *= bounds->scale; |
1445 | bounds->min.y *= bounds->scale; |
1446 | |
1447 | pos2lpos_center(&bounds->ll_max, &bounds->max); |
1448 | bounds->max.x -= bounds->center.x; |
1449 | bounds->max.y -= bounds->center.y; |
1450 | bounds->max.x *= bounds->scale; |
1451 | bounds->max.y *= bounds->scale; |
1452 | |
1453 | return TRUE; |
1454 | } |
1455 | |
1456 | static gboolean osm_tag_cb(qnd_xml_stack_t *stack, |
1457 | qnd_xml_attribute_t *attributes, gpointer data) { |
1458 | |
1459 | tag_t *tag = *(tag_t**)stack->prev->userdata[1] = g_new0(tag_t, 1); |
1460 | |
1461 | tag->key = qnd_xml_get_prop_str(attributes, "k"); |
1462 | tag->value = qnd_xml_get_prop_str(attributes, "v"); |
1463 | |
1464 | if(!tag->key || !tag->value) { |
1465 | printf("incomplete tag key/value %s/%s\n", tag->key, tag->value); |
1466 | osm_tags_free(tag); |
1467 | tag = NULL; |
1468 | } else |
1469 | stack->prev->userdata[1] = &tag->next; |
1470 | |
1471 | return TRUE; |
1472 | } |
1473 | |
1474 | static gboolean osm_node_cb(qnd_xml_stack_t *stack, |
1475 | qnd_xml_attribute_t *attributes, gpointer data) { |
1476 | |
1477 | osm_t *osm = (osm_t*)stack->prev->userdata[0]; |
1478 | |
1479 | /* allocate a new node structure. userdata[1] points to the current */ |
1480 | /* position a new node is to be stored */ |
1481 | node_t *node = *(node_t**)stack->prev->userdata[1] = |
1482 | stack->userdata[0] = g_new0(node_t, 1); |
1483 | stack->prev->userdata[1] = &node->next; |
1484 | |
1485 | qnd_xml_get_prop_gulong(attributes, "id", &node->id); |
1486 | qnd_xml_get_prop_double(attributes, "lat", &node->pos.lat); |
1487 | qnd_xml_get_prop_double(attributes, "lon", &node->pos.lon); |
1488 | node->user = osm_user(osm, qnd_xml_get_prop(attributes, "user")); |
1489 | node->visible = qnd_xml_get_prop_is(attributes, "visible", "true"); |
1490 | node->time = convert_iso8601(qnd_xml_get_prop(attributes, "timestamp")); |
1491 | |
1492 | pos2lpos(osm->bounds, &node->pos, &node->lpos); |
1493 | |
1494 | /* store current tag pointer in userdata for fast access to current tag */ |
1495 | stack->userdata[1] = &node->tag; |
1496 | |
1497 | return TRUE; |
1498 | } |
1499 | |
1500 | static gboolean osm_way_nd_cb(qnd_xml_stack_t *stack, |
1501 | qnd_xml_attribute_t *attributes, gpointer data) { |
1502 | |
1503 | osm_t *osm = (osm_t*)stack->prev->prev->userdata[0]; |
1504 | |
1505 | item_id_t id; |
1506 | if(qnd_xml_get_prop_gulong(attributes, "ref", &id)) { |
1507 | /* allocate a new node_chain structure */ |
1508 | node_chain_t *node_chain = *(node_chain_t**)stack->prev->userdata[2] = |
1509 | g_new0(node_chain_t, 1); |
1510 | |
1511 | /* search matching node */ |
1512 | node_chain->node = osm->node; |
1513 | while(node_chain->node && node_chain->node->id != id) |
1514 | node_chain->node = node_chain->node->next; |
1515 | |
1516 | if(!node_chain->node) printf("Node id %lu not found\n", id); |
1517 | |
1518 | if(node_chain->node) |
1519 | node_chain->node->ways++; |
1520 | |
1521 | stack->prev->userdata[2] = &node_chain->next; |
1522 | } |
1523 | |
1524 | return TRUE; |
1525 | } |
1526 | |
1527 | gboolean osm_way_cb(qnd_xml_stack_t *stack, |
1528 | qnd_xml_attribute_t *attributes, gpointer data) { |
1529 | |
1530 | osm_t *osm = (osm_t*)stack->prev->userdata[0]; |
1531 | |
1532 | /* allocate a new way structure. userdata[2] points to the current */ |
1533 | /* position a new way is to be stored in the way list */ |
1534 | way_t *way = *(way_t**)stack->prev->userdata[2] = |
1535 | stack->userdata[0] = g_new0(way_t, 1); |
1536 | stack->prev->userdata[2] = &way->next; |
1537 | |
1538 | qnd_xml_get_prop_gulong(attributes, "id", &way->id); |
1539 | way->user = osm_user(osm, qnd_xml_get_prop(attributes, "user")); |
1540 | way->visible = qnd_xml_get_prop_is(attributes, "visible", "true"); |
1541 | way->time = convert_iso8601(qnd_xml_get_prop(attributes, "timestamp")); |
1542 | |
1543 | /* store current tag and node_chain pointers in userdata for fast */ |
1544 | /* access to current tag/node_chain entry */ |
1545 | stack->userdata[1] = &way->tag; |
1546 | stack->userdata[2] = &way->node_chain; |
1547 | |
1548 | return TRUE; |
1549 | } |
1550 | |
1551 | static gboolean osm_rel_member_cb(qnd_xml_stack_t *stack, |
1552 | qnd_xml_attribute_t *attributes, gpointer data) { |
1553 | |
1554 | osm_t *osm = (osm_t*)stack->prev->prev->userdata[0]; |
1555 | |
1556 | member_t *member = *(member_t**)stack->prev->userdata[2] = |
1557 | g_new0(member_t, 1); |
1558 | stack->prev->userdata[2] = &member->next; |
1559 | member->type = ILLEGAL; |
1560 | |
1561 | char *type = qnd_xml_get_prop(attributes, "type"); |
1562 | if(type) { |
1563 | if(strcasecmp(type, "way") == 0) member->type = WAY; |
1564 | else if(strcasecmp(type, "node") == 0) member->type = NODE; |
1565 | else if(strcasecmp(type, "relation") == 0) member->type = RELATION; |
1566 | } |
1567 | |
1568 | item_id_t id; |
1569 | if(qnd_xml_get_prop_gulong(attributes, "ref", &id)) { |
1570 | switch(member->type) { |
1571 | case ILLEGAL: |
1572 | printf("Unable to store illegal type\n"); |
1573 | break; |
1574 | |
1575 | case WAY: |
1576 | /* search matching way */ |
1577 | member->way = osm->way; |
1578 | while(member->way && member->way->id != id) |
1579 | member->way = member->way->next; |
1580 | |
1581 | if(!member->way) { |
1582 | member->type = WAY_ID; |
1583 | member->id = id; |
1584 | } |
1585 | break; |
1586 | |
1587 | case NODE: |
1588 | /* search matching node */ |
1589 | member->node = osm->node; |
1590 | while(member->node && member->node->id != id) |
1591 | member->node = member->node->next; |
1592 | |
1593 | if(!member->node) { |
1594 | member->type = NODE_ID; |
1595 | member->id = id; |
1596 | } |
1597 | break; |
1598 | |
1599 | case RELATION: |
1600 | /* search matching relation */ |
1601 | member->relation = osm->relation; |
1602 | while(member->relation && member->relation->id != id) |
1603 | member->relation = member->relation->next; |
1604 | |
1605 | if(!member->relation) { |
1606 | member->type = NODE_ID; |
1607 | member->id = id; |
1608 | } |
1609 | break; |
1610 | |
1611 | case WAY_ID: |
1612 | case NODE_ID: |
1613 | case RELATION_ID: |
1614 | break; |
1615 | } |
1616 | } |
1617 | |
1618 | return TRUE; |
1619 | } |
1620 | |
1621 | gboolean osm_rel_cb(qnd_xml_stack_t *stack, |
1622 | qnd_xml_attribute_t *attributes, gpointer data) { |
1623 | |
1624 | osm_t *osm = (osm_t*)stack->prev->userdata[0]; |
1625 | |
1626 | /* allocate a new relation structure. userdata[3] points to the current */ |
1627 | /* position a new relation is to be stored at in the relation list */ |
1628 | relation_t *relation = *(relation_t**)stack->prev->userdata[3] = |
1629 | stack->userdata[0] = g_new0(relation_t, 1); |
1630 | stack->prev->userdata[3] = &relation->next; |
1631 | |
1632 | qnd_xml_get_prop_gulong(attributes, "id", &relation->id); |
1633 | relation->user = osm_user(osm, qnd_xml_get_prop(attributes, "user")); |
1634 | relation->visible = qnd_xml_get_prop_is(attributes, "visible", "true"); |
1635 | relation->time = convert_iso8601(qnd_xml_get_prop(attributes, "timestamp")); |
1636 | |
1637 | /* store current tag and member pointers in userdata for fast access */ |
1638 | /* to current tag and members in their chains */ |
1639 | stack->userdata[1] = &relation->tag; |
1640 | stack->userdata[2] = &relation->member; |
1641 | |
1642 | return TRUE; |
1643 | } |
1644 | |
1645 | gboolean osm_cb(qnd_xml_stack_t *stack, |
1646 | qnd_xml_attribute_t *attributes, gpointer data) { |
1647 | |
1648 | g_assert(!stack->userdata[0]); |
1649 | |
1650 | /* also set parents (roots) userdata as it's the parsers return value */ |
1651 | osm_t *osm = stack->prev->userdata[0] = |
1652 | stack->userdata[0] = g_new0(osm_t, 1); |
1653 | |
1654 | /* store direct pointers for faster list access */ |
1655 | /* (otherwise we'd have to search the end of the lists for every item */ |
1656 | /* to be attached) */ |
1657 | stack->userdata[1] = &osm->node; |
1658 | stack->userdata[2] = &osm->way; |
1659 | stack->userdata[3] = &osm->relation; |
1660 | |
1661 | return TRUE; |
1662 | } |
1663 | |
1664 | |
1665 | /* these structures describe the content qnd_xml expects while parsing */ |
1666 | qnd_xml_entry_t osm_node_tag = { "tag", osm_tag_cb, QND_XML_LEAF }; |
1667 | |
1668 | qnd_xml_entry_t osm_way_tag = { "tag", osm_tag_cb, QND_XML_LEAF }; |
1669 | qnd_xml_entry_t osm_way_nd = { "nd", osm_way_nd_cb, QND_XML_LEAF }; |
1670 | |
1671 | qnd_xml_entry_t osm_rel_tag = { "tag", osm_tag_cb, QND_XML_LEAF }; |
1672 | qnd_xml_entry_t osm_rel_member = { "member", osm_rel_member_cb, QND_XML_LEAF }; |
1673 | |
1674 | qnd_xml_entry_t osm_bounds = { "bounds", osm_bounds_cb, QND_XML_LEAF }; |
1675 | |
1676 | qnd_xml_entry_t *node_children[] = { &osm_node_tag }, |
1677 | osm_node = { "node", osm_node_cb, QND_XML_CHILDREN(node_children) }; |
1678 | |
1679 | qnd_xml_entry_t *way_children[] = { &osm_way_tag, &osm_way_nd }, |
1680 | osm_way = { "way", osm_way_cb, QND_XML_CHILDREN(way_children) }; |
1681 | |
1682 | qnd_xml_entry_t *rel_children[] = { &osm_rel_tag, &osm_rel_member }, |
1683 | osm_rel = { "rel", osm_rel_cb, QND_XML_CHILDREN(rel_children) }; |
1684 | |
1685 | /* the osm element */ |
1686 | qnd_xml_entry_t *osm_children[] = { |
1687 | &osm_bounds, &osm_node, &osm_way, &osm_rel }; |
1688 | qnd_xml_entry_t osm = { "osm", osm_cb, QND_XML_CHILDREN(osm_children) }; |
1689 | |
1690 | /* the root element */ |
1691 | qnd_xml_entry_t *root_children[] = { &osm }; |
1692 | qnd_xml_entry_t root = { "<root>", NULL, QND_XML_CHILDREN(root_children) }; |
1693 | |
1694 | // gcc `pkg-config --cflags --libs glib-2.0` -o qnd_xml qnd_xml.c |
1695 | |
1696 | |
1697 | |
1698 | /* ----------------------- end of qnd-xml parser tests ------------------- */ |
1699 | #endif |
1700 | |
1701 | |
1702 | #include <sys/time.h> |
1703 | |
1704 | osm_t *osm_parse(char *filename) { |
1705 | |
1706 | struct timeval start; |
1707 | gettimeofday(&start, NULL); |
1708 | |
1709 | |
1710 | #ifdef OSM_STREAM_PARSER |
1711 | LIBXML_TEST_VERSION; |
1712 | |
1713 | // use stream parser |
1714 | osm_t *osm = process_file(filename); |
1715 | xmlCleanupParser(); |
1716 | #endif |
1717 | |
1718 | #ifdef OSM_DOM_PARSER |
1719 | LIBXML_TEST_VERSION; |
1720 | |
1721 | // parse into a tree |
1722 | /* parse the file and get the DOM */ |
1723 | xmlDoc *doc = NULL; |
1724 | if ((doc = xmlReadFile(filename, NULL, 0)) == NULL) { |
1725 | xmlErrorPtr errP = xmlGetLastError(); |
1726 | errorf(NULL, "While parsing \"%s\":\n\n%s", filename, errP->message); |
1727 | return NULL; |
1728 | } |
1729 | |
1730 | osm_t *osm = osm_parse_doc(doc); |
1731 | #endif |
1732 | |
1733 | #ifdef OSM_QND_XML_PARSER |
1734 | osm_t *osm = NULL; |
1735 | if(!(osm = qnd_xml_parse(filename, &root, NULL))) { |
1736 | errorf(NULL, "While parsing \"%s\"", filename); |
1737 | return NULL; |
1738 | } |
1739 | #endif |
1740 | |
1741 | struct timeval end; |
1742 | gettimeofday(&end, NULL); |
1743 | |
1744 | printf("total parse time: %ldms\n", |
1745 | (end.tv_usec - start.tv_usec)/1000 + |
1746 | (end.tv_sec - start.tv_sec)*1000); |
1747 | |
1748 | return osm; |
1749 | } |
1750 | |
1751 | gboolean osm_sanity_check(GtkWidget *parent, osm_t *osm) { |
1752 | if(!osm->bounds) { |
1753 | errorf(parent, _("Invalid data in OSM file:\n" |
1754 | "Boundary box missing!")); |
1755 | return FALSE; |
1756 | } |
1757 | if(!osm->node) { |
1758 | errorf(parent, _("Invalid data in OSM file:\n" |
1759 | "No drawable content found!")); |
1760 | return FALSE; |
1761 | } |
1762 | return TRUE; |
1763 | } |
1764 | |
1765 | /* ------------------------- misc access functions -------------- */ |
1766 | |
1767 | char *osm_tag_get_by_key(tag_t *tag, char *key) { |
1768 | if(!tag || !key) return NULL; |
1769 | |
1770 | while(tag) { |
1771 | if(strcasecmp(tag->key, key) == 0) |
1772 | return tag->value; |
1773 | |
1774 | tag = tag->next; |
1775 | } |
1776 | |
1777 | return NULL; |
1778 | } |
1779 | |
1780 | char *osm_way_get_value(way_t *way, char *key) { |
1781 | tag_t *tag = way->tag; |
1782 | |
1783 | while(tag) { |
1784 | if(strcasecmp(tag->key, key) == 0) |
1785 | return tag->value; |
1786 | |
1787 | tag = tag->next; |
1788 | } |
1789 | |
1790 | return NULL; |
1791 | } |
1792 | |
1793 | char *osm_node_get_value(node_t *node, char *key) { |
1794 | tag_t *tag = node->tag; |
1795 | |
1796 | while(tag) { |
1797 | if(strcasecmp(tag->key, key) == 0) |
1798 | return tag->value; |
1799 | |
1800 | tag = tag->next; |
1801 | } |
1802 | |
1803 | return NULL; |
1804 | } |
1805 | |
1806 | gboolean osm_way_has_value(way_t *way, char *str) { |
1807 | tag_t *tag = way->tag; |
1808 | |
1809 | while(tag) { |
1810 | if(tag->value && strcasecmp(tag->value, str) == 0) |
1811 | return TRUE; |
1812 | |
1813 | tag = tag->next; |
1814 | } |
1815 | return FALSE; |
1816 | } |
1817 | |
1818 | gboolean osm_node_has_value(node_t *node, char *str) { |
1819 | tag_t *tag = node->tag; |
1820 | |
1821 | while(tag) { |
1822 | if(tag->value && strcasecmp(tag->value, str) == 0) |
1823 | return TRUE; |
1824 | |
1825 | tag = tag->next; |
1826 | } |
1827 | return FALSE; |
1828 | } |
1829 | |
1830 | gboolean osm_node_has_tag(node_t *node) { |
1831 | tag_t *tag = node->tag; |
1832 | |
1833 | if(tag && strcasecmp(tag->key, "created_by") == 0) |
1834 | tag = tag->next; |
1835 | |
1836 | return tag != NULL; |
1837 | } |
1838 | |
1839 | /* return true if node is part of way */ |
1840 | gboolean osm_node_in_way(way_t *way, node_t *node) { |
1841 | node_chain_t *node_chain = way->node_chain; |
1842 | while(node_chain) { |
1843 | if(node_chain->node == node) |
1844 | return TRUE; |
1845 | |
1846 | node_chain = node_chain->next; |
1847 | } |
1848 | return FALSE; |
1849 | } |
1850 | |
1851 | static void osm_generate_tags(tag_t *tag, xmlNodePtr node) { |
1852 | while(tag) { |
1853 | /* make sure "created_by" tag contains our id */ |
1854 | if(strcasecmp(tag->key, "created_by") == 0) { |
1855 | g_free(tag->value); |
1856 | tag->value = g_strdup(PACKAGE " v" VERSION); |
1857 | } |
1858 | |
1859 | xmlNodePtr tag_node = xmlNewChild(node, NULL, BAD_CAST "tag", NULL); |
1860 | xmlNewProp(tag_node, BAD_CAST "k", BAD_CAST tag->key); |
1861 | xmlNewProp(tag_node, BAD_CAST "v", BAD_CAST tag->value); |
1862 | tag = tag->next; |
1863 | } |
1864 | } |
1865 | |
1866 | /* build xml representation for a way */ |
1867 | char *osm_generate_xml(osm_t *osm, type_t type, void *item) { |
1868 | char str[32]; |
1869 | xmlChar *result = NULL; |
1870 | int len = 0; |
1871 | |
1872 | LIBXML_TEST_VERSION; |
1873 | |
1874 | xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0"); |
1875 | xmlNodePtr root_node = xmlNewNode(NULL, BAD_CAST "osm"); |
1876 | xmlNewProp(root_node, BAD_CAST "version", BAD_CAST "0.5"); |
1877 | xmlNewProp(root_node, BAD_CAST "generator", BAD_CAST PACKAGE " V" VERSION); |
1878 | xmlDocSetRootElement(doc, root_node); |
1879 | |
1880 | switch(type) { |
1881 | case NODE: |
1882 | { |
1883 | node_t *node = (node_t*)item; |
1884 | xmlNodePtr node_node = xmlNewChild(root_node, NULL, |
1885 | BAD_CAST "node", NULL); |
1886 | /* new nodes don't have an id, but get one after the upload */ |
1887 | if(!(node->flags & OSM_FLAG_NEW)) { |
1888 | snprintf(str, sizeof(str), "%u", (unsigned)node->id); |
1889 | xmlNewProp(node_node, BAD_CAST "id", BAD_CAST str); |
1890 | } |
1891 | g_ascii_dtostr(str, sizeof(str), node->pos.lat); |
1892 | xmlNewProp(node_node, BAD_CAST "lat", BAD_CAST str); |
1893 | g_ascii_dtostr(str, sizeof(str), node->pos.lon); |
1894 | xmlNewProp(node_node, BAD_CAST "lon", BAD_CAST str); |
1895 | osm_generate_tags(node->tag, node_node); |
1896 | } |
1897 | break; |
1898 | |
1899 | case WAY: |
1900 | { |
1901 | way_t *way = (way_t*)item; |
1902 | xmlNodePtr way_node = xmlNewChild(root_node, NULL, BAD_CAST "way", NULL); |
1903 | snprintf(str, sizeof(str), "%u", (unsigned)way->id); |
1904 | xmlNewProp(way_node, BAD_CAST "id", BAD_CAST str); |
1905 | |
1906 | node_chain_t *node_chain = way->node_chain; |
1907 | while(node_chain) { |
1908 | xmlNodePtr nd_node = xmlNewChild(way_node, NULL, BAD_CAST "nd", NULL); |
1909 | char *str = g_strdup_printf("%ld", node_chain->node->id); |
1910 | xmlNewProp(nd_node, BAD_CAST "ref", BAD_CAST str); |
1911 | g_free(str); |
1912 | node_chain = node_chain->next; |
1913 | } |
1914 | |
1915 | osm_generate_tags(way->tag, way_node); |
1916 | } |
1917 | break; |
1918 | |
1919 | case RELATION: |
1920 | { |
1921 | relation_t *relation = (relation_t*)item; |
1922 | xmlNodePtr rel_node = xmlNewChild(root_node, NULL, |
1923 | BAD_CAST "relation", NULL); |
1924 | snprintf(str, sizeof(str), "%u", (unsigned)relation->id); |
1925 | xmlNewProp(rel_node, BAD_CAST "id", BAD_CAST str); |
1926 | |
1927 | member_t *member = relation->member; |
1928 | while(member) { |
1929 | xmlNodePtr m_node = xmlNewChild(rel_node,NULL,BAD_CAST "member", NULL); |
1930 | char *str = NULL; |
1931 | |
1932 | switch(member->type) { |
1933 | case NODE: |
1934 | xmlNewProp(m_node, BAD_CAST "type", BAD_CAST "node"); |
1935 | str = g_strdup_printf("%ld", member->node->id); |
1936 | break; |
1937 | |
1938 | case WAY: |
1939 | xmlNewProp(m_node, BAD_CAST "type", BAD_CAST "way"); |
1940 | str = g_strdup_printf("%ld", member->way->id); |
1941 | break; |
1942 | |
1943 | case RELATION: |
1944 | xmlNewProp(m_node, BAD_CAST "type", BAD_CAST "relation"); |
1945 | str = g_strdup_printf("%ld", member->relation->id); |
1946 | break; |
1947 | |
1948 | default: |
1949 | break; |
1950 | } |
1951 | |
1952 | if(str) { |
1953 | xmlNewProp(m_node, BAD_CAST "ref", BAD_CAST str); |
1954 | g_free(str); |
1955 | } |
1956 | |
1957 | if(member->role) |
1958 | xmlNewProp(m_node, BAD_CAST "role", BAD_CAST member->role); |
1959 | else |
1960 | xmlNewProp(m_node, BAD_CAST "role", BAD_CAST ""); |
1961 | |
1962 | member = member->next; |
1963 | } |
1964 | osm_generate_tags(relation->tag, rel_node); |
1965 | } |
1966 | break; |
1967 | |
1968 | default: |
1969 | printf("neither NODE nor WAY nor RELATION\n"); |
1970 | g_assert(0); |
1971 | break; |
1972 | } |
1973 | |
1974 | xmlDocDumpFormatMemoryEnc(doc, &result, &len, "UTF-8", 1); |
1975 | xmlFreeDoc(doc); |
1976 | xmlCleanupParser(); |
1977 | |
1978 | // puts("xml encoding result:"); |
1979 | // puts((char*)result); |
1980 | |
1981 | return (char*)result; |
1982 | } |
1983 | |
1984 | /* build xml representation for a node */ |
1985 | char *osm_generate_xml_node(osm_t *osm, node_t *node) { |
1986 | return osm_generate_xml(osm, NODE, node); |
1987 | } |
1988 | |
1989 | /* build xml representation for a way */ |
1990 | char *osm_generate_xml_way(osm_t *osm, way_t *way) { |
1991 | return osm_generate_xml(osm, WAY, way); |
1992 | } |
1993 | |
1994 | /* build xml representation for a relation */ |
1995 | char *osm_generate_xml_relation(osm_t *osm, relation_t *relation) { |
1996 | return osm_generate_xml(osm, RELATION, relation); |
1997 | } |
1998 | |
1999 | node_t *osm_get_node_by_id(osm_t *osm, item_id_t id) { |
2000 | node_t *node = osm->node; |
2001 | while(node) { |
2002 | if(node->id == id) |
2003 | return node; |
2004 | |
2005 | node = node->next; |
2006 | } |
2007 | return NULL; |
2008 | } |
2009 | |
2010 | way_t *osm_get_way_by_id(osm_t *osm, item_id_t id) { |
2011 | way_t *way = osm->way; |
2012 | while(way) { |
2013 | if(way->id == id) |
2014 | return way; |
2015 | |
2016 | way = way->next; |
2017 | } |
2018 | return NULL; |
2019 | } |
2020 | |
2021 | relation_t *osm_get_relation_by_id(osm_t *osm, item_id_t id) { |
2022 | relation_t *relation = osm->relation; |
2023 | while(relation) { |
2024 | if(relation->id == id) |
2025 | return relation; |
2026 | |
2027 | relation = relation->next; |
2028 | } |
2029 | |
2030 | return NULL; |
2031 | } |
2032 | |
2033 | /* ---------- edit functions ------------- */ |
2034 | |
2035 | item_id_t osm_new_way_id(osm_t *osm) { |
2036 | item_id_t id = -1; |
2037 | |
2038 | while(TRUE) { |
2039 | gboolean found = FALSE; |
2040 | way_t *way = osm->way; |
2041 | while(way) { |
2042 | if(way->id == id) |
2043 | found = TRUE; |
2044 | |
2045 | way = way->next; |
2046 | } |
2047 | |
2048 | /* no such id so far -> use it */ |
2049 | if(!found) return id; |
2050 | |
2051 | id--; |
2052 | } |
2053 | g_assert(0); |
2054 | return 0; |
2055 | } |
2056 | |
2057 | item_id_t osm_new_node_id(osm_t *osm) { |
2058 | item_id_t id = -1; |
2059 | |
2060 | while(TRUE) { |
2061 | gboolean found = FALSE; |
2062 | node_t *node = osm->node; |
2063 | while(node) { |
2064 | if(node->id == id) |
2065 | found = TRUE; |
2066 | |
2067 | node = node->next; |
2068 | } |
2069 | |
2070 | /* no such id so far -> use it */ |
2071 | if(!found) return id; |
2072 | |
2073 | id--; |
2074 | } |
2075 | g_assert(0); |
2076 | return 0; |
2077 | } |
2078 | |
2079 | node_t *osm_node_new(osm_t *osm, gint x, gint y) { |
2080 | printf("Creating new node\n"); |
2081 | |
2082 | node_t *node = g_new0(node_t, 1); |
2083 | node->lpos.x = x; |
2084 | node->lpos.y = y; |
2085 | node->visible = TRUE; |
2086 | node->time = time(NULL); |
2087 | |
2088 | /* add created_by tag */ |
2089 | node->tag = g_new0(tag_t, 1); |
2090 | node->tag->key = g_strdup("created_by"); |
2091 | node->tag->value = g_strdup(PACKAGE " v" VERSION); |
2092 | |
2093 | /* convert screen position back to ll */ |
2094 | lpos2pos(osm->bounds, &node->lpos, &node->pos); |
2095 | |
2096 | printf(" new at %d %d (%f %f)\n", |
2097 | node->lpos.x, node->lpos.y, node->pos.lat, node->pos.lon); |
2098 | |
2099 | return node; |
2100 | } |
2101 | |
2102 | |
2103 | void osm_node_attach(osm_t *osm, node_t *node) { |
2104 | printf("Attaching node\n"); |
2105 | |
2106 | node->id = osm_new_node_id(osm); |
2107 | node->flags = OSM_FLAG_NEW; |
2108 | |
2109 | /* attach to end of node list */ |
2110 | node_t **lnode = &osm->node; |
2111 | while(*lnode) lnode = &(*lnode)->next; |
2112 | *lnode = node; |
2113 | } |
2114 | |
2115 | way_t *osm_way_new(void) { |
2116 | printf("Creating new way\n"); |
2117 | |
2118 | way_t *way = g_new0(way_t, 1); |
2119 | way->visible = TRUE; |
2120 | way->flags = OSM_FLAG_NEW; |
2121 | way->time = time(NULL); |
2122 | |
2123 | /* add created_by tag */ |
2124 | way->tag = g_new0(tag_t, 1); |
2125 | way->tag->key = g_strdup("created_by"); |
2126 | way->tag->value = g_strdup(PACKAGE " v" VERSION); |
2127 | |
2128 | return way; |
2129 | } |
2130 | |
2131 | void osm_way_attach(osm_t *osm, way_t *way) { |
2132 | printf("Attaching way\n"); |
2133 | |
2134 | way->id = osm_new_way_id(osm); |
2135 | way->flags = OSM_FLAG_NEW; |
2136 | |
2137 | /* attach to end of way list */ |
2138 | way_t **lway = &osm->way; |
2139 | while(*lway) lway = &(*lway)->next; |
2140 | *lway = way; |
2141 | } |
2142 | |
2143 | /* returns pointer to chain of ways affected by this deletion */ |
2144 | way_chain_t *osm_node_delete(osm_t *osm, icon_t **icon, |
2145 | node_t *node, gboolean permanently, |
2146 | gboolean affect_ways) { |
2147 | way_chain_t *way_chain = NULL, **cur_way_chain = &way_chain; |
2148 | |
2149 | /* new nodes aren't stored on the server and are just deleted permanently */ |
2150 | if(node->flags & OSM_FLAG_NEW) { |
2151 | printf("About to delete NEW node #%ld -> force permanent delete\n", |
2152 | node->id); |
2153 | permanently = TRUE; |
2154 | } |
2155 | |
2156 | /* first remove node from all ways using it */ |
2157 | way_t *way = osm->way; |
2158 | while(way) { |
2159 | node_chain_t **chain = &(way->node_chain); |
2160 | gboolean modified = FALSE; |
2161 | while(*chain) { |
2162 | /* remove node from chain */ |
2163 | if(node == (*chain)->node) { |
2164 | modified = TRUE; |
2165 | if(affect_ways) { |
2166 | node_chain_t *next = (*chain)->next; |
2167 | g_free(*chain); |
2168 | *chain = next; |
2169 | } else |
2170 | chain = &((*chain)->next); |
2171 | } else |
2172 | chain = &((*chain)->next); |
2173 | } |
2174 | |
2175 | if(modified) { |
2176 | way->flags |= OSM_FLAG_DIRTY; |
2177 | |
2178 | /* and add the way to the list of affected ways */ |
2179 | *cur_way_chain = g_new0(way_chain_t, 1); |
2180 | (*cur_way_chain)->way = way; |
2181 | cur_way_chain = &((*cur_way_chain)->next); |
2182 | } |
2183 | |
2184 | way = way->next; |
2185 | } |
2186 | |
2187 | if(!permanently) { |
2188 | printf("mark node #%ld as deleted\n", node->id); |
2189 | node->flags |= OSM_FLAG_DELETED; |
2190 | } else { |
2191 | printf("permanently delete node #%ld\n", node->id); |
2192 | |
2193 | /* remove it from the chain */ |
2194 | node_t **cnode = &osm->node; |
2195 | int found = 0; |
2196 | |
2197 | while(*cnode) { |
2198 | if(*cnode == node) { |
2199 | found++; |
2200 | *cnode = (*cnode)->next; |
2201 | |
2202 | osm_node_free(icon, node); |
2203 | } else |
2204 | cnode = &((*cnode)->next); |
2205 | } |
2206 | g_assert(found == 1); |
2207 | } |
2208 | |
2209 | return way_chain; |
2210 | } |
2211 | |
2212 | guint osm_way_number_of_nodes(way_t *way) { |
2213 | guint nodes = 0; |
2214 | node_chain_t *chain = way->node_chain; |
2215 | while(chain) { |
2216 | nodes++; |
2217 | chain = chain->next; |
2218 | } |
2219 | return nodes; |
2220 | } |
2221 | |
2222 | /* return all relations a node is in */ |
2223 | relation_chain_t *osm_node_to_relation(osm_t *osm, node_t *node) { |
2224 | relation_chain_t *rel_chain = NULL, **cur_rel_chain = &rel_chain; |
2225 | |
2226 | relation_t *relation = osm->relation; |
2227 | while(relation) { |
2228 | gboolean is_member = FALSE; |
2229 | |
2230 | member_t *member = relation->member; |
2231 | while(member) { |
2232 | switch(member->type) { |
2233 | case NODE: |
2234 | /* nodes are checked directly */ |
2235 | if(member->node == node) |
2236 | is_member = TRUE; |
2237 | break; |
2238 | |
2239 | case WAY: { |
2240 | /* ways have to be checked for the nodes they consist of */ |
2241 | node_chain_t *chain = member->way->node_chain; |
2242 | while(chain && !is_member) { |
2243 | if(chain->node == node) |
2244 | is_member = TRUE; |
2245 | |
2246 | chain = chain->next; |
2247 | } |
2248 | } break; |
2249 | |
2250 | default: |
2251 | break; |
2252 | } |
2253 | member = member->next; |
2254 | } |
2255 | |
2256 | /* node is a member of this relation, so move it to the member chain */ |
2257 | if(is_member) { |
2258 | *cur_rel_chain = g_new0(relation_chain_t, 1); |
2259 | (*cur_rel_chain)->relation = relation; |
2260 | cur_rel_chain = &((*cur_rel_chain)->next); |
2261 | } |
2262 | |
2263 | relation = relation->next; |
2264 | } |
2265 | |
2266 | return rel_chain; |
2267 | } |
2268 | |
2269 | /* return all relations a way is in */ |
2270 | relation_chain_t *osm_way_to_relation(osm_t *osm, way_t *way) { |
2271 | relation_chain_t *rel_chain = NULL, **cur_rel_chain = &rel_chain; |
2272 | |
2273 | relation_t *relation = osm->relation; |
2274 | while(relation) { |
2275 | gboolean is_member = FALSE; |
2276 | |
2277 | member_t *member = relation->member; |
2278 | while(member) { |
2279 | switch(member->type) { |
2280 | case WAY: { |
2281 | /* ways can be check directly */ |
2282 | if(member->way == way) |
2283 | is_member = TRUE; |
2284 | } break; |
2285 | |
2286 | default: |
2287 | break; |
2288 | } |
2289 | member = member->next; |
2290 | } |
2291 | |
2292 | /* way is a member of this relation, so move it to the member chain */ |
2293 | if(is_member) { |
2294 | *cur_rel_chain = g_new0(relation_chain_t, 1); |
2295 | (*cur_rel_chain)->relation = relation; |
2296 | cur_rel_chain = &((*cur_rel_chain)->next); |
2297 | } |
2298 | |
2299 | relation = relation->next; |
2300 | } |
2301 | |
2302 | return rel_chain; |
2303 | } |
2304 | |
2305 | /* return all ways a node is in */ |
2306 | way_chain_t *osm_node_to_way(osm_t *osm, node_t *node) { |
2307 | way_chain_t *chain = NULL, **cur_chain = &chain; |
2308 | |
2309 | way_t *way = osm->way; |
2310 | while(way) { |
2311 | gboolean is_member = FALSE; |
2312 | |
2313 | node_chain_t *node_chain = way->node_chain; |
2314 | while(node_chain) { |
2315 | if(node_chain->node == node) |
2316 | is_member = TRUE; |
2317 | |
2318 | node_chain = node_chain->next; |
2319 | } |
2320 | |
2321 | /* node is a member of this relation, so move it to the member chain */ |
2322 | if(is_member) { |
2323 | *cur_chain = g_new0(way_chain_t, 1); |
2324 | (*cur_chain)->way = way; |
2325 | cur_chain = &((*cur_chain)->next); |
2326 | } |
2327 | |
2328 | way = way->next; |
2329 | } |
2330 | |
2331 | return chain; |
2332 | } |
2333 | |
2334 | gboolean osm_position_within_bounds(osm_t *osm, gint x, gint y) { |
2335 | if((x < osm->bounds->min.x) || (x > osm->bounds->max.x)) return FALSE; |
2336 | if((y < osm->bounds->min.y) || (y > osm->bounds->max.y)) return FALSE; |
2337 | return TRUE; |
2338 | } |
2339 | |
2340 | /* remove the given node from all relations. used if the node is to */ |
2341 | /* be deleted */ |
2342 | void osm_node_remove_from_relation(osm_t *osm, node_t *node) { |
2343 | relation_t *relation = osm->relation; |
2344 | printf("removing node #%ld from all relations:\n", node->id); |
2345 | |
2346 | while(relation) { |
2347 | member_t **member = &relation->member; |
2348 | while(*member) { |
2349 | if(((*member)->type == NODE) && |
2350 | ((*member)->node == node)) { |
2351 | |
2352 | printf(" from relation #%ld\n", relation->id); |
2353 | |
2354 | member_t *cur = *member; |
2355 | *member = (*member)->next; |
2356 | osm_member_free(cur); |
2357 | |
2358 | relation->flags |= OSM_FLAG_DIRTY; |
2359 | } else |
2360 | member = &(*member)->next; |
2361 | } |
2362 | relation = relation->next; |
2363 | } |
2364 | } |
2365 | |
2366 | /* remove the given way from all relations */ |
2367 | void osm_way_remove_from_relation(osm_t *osm, way_t *way) { |
2368 | relation_t *relation = osm->relation; |
2369 | printf("removing way #%ld from all relations:\n", way->id); |
2370 | |
2371 | while(relation) { |
2372 | member_t **member = &relation->member; |
2373 | while(*member) { |
2374 | if(((*member)->type == WAY) && |
2375 | ((*member)->way == way)) { |
2376 | |
2377 | printf(" from relation #%ld\n", relation->id); |
2378 | |
2379 | member_t *cur = *member; |
2380 | *member = (*member)->next; |
2381 | osm_member_free(cur); |
2382 | |
2383 | relation->flags |= OSM_FLAG_DIRTY; |
2384 | } else |
2385 | member = &(*member)->next; |
2386 | } |
2387 | relation = relation->next; |
2388 | } |
2389 | } |
2390 | |
2391 | void osm_way_delete(osm_t *osm, icon_t **icon, |
2392 | way_t *way, gboolean permanently) { |
2393 | |
2394 | /* new ways aren't stored on the server and are just deleted permanently */ |
2395 | if(way->flags & OSM_FLAG_NEW) { |
2396 | printf("About to delete NEW way #%ld -> force permanent delete\n", |
2397 | way->id); |
2398 | permanently = TRUE; |
2399 | } |
2400 | |
2401 | /* delete all nodes that aren't in other use now */ |
2402 | node_chain_t **chain = &way->node_chain; |
2403 | while(*chain) { |
2404 | |
2405 | (*chain)->node->ways--; |
2406 | printf("checking node #%ld (still used by %d)\n", |
2407 | (*chain)->node->id, (*chain)->node->ways); |
2408 | |
2409 | /* this node must only be part of this way */ |
2410 | if(!(*chain)->node->ways) { |
2411 | /* delete this node, but don't let this actually affect the */ |
2412 | /* associated ways as the only such way is the oen we are currently */ |
2413 | /* deleting */ |
2414 | way_chain_t *way_chain = |
2415 | osm_node_delete(osm, icon, (*chain)->node, FALSE, FALSE); |
2416 | g_assert(way_chain); |
2417 | while(way_chain) { |
2418 | way_chain_t *way_next = way_chain->next; |
2419 | g_assert(way_chain->way == way); |
2420 | g_free(way_chain); |
2421 | way_chain = way_next; |
2422 | } |
2423 | } |
2424 | |
2425 | node_chain_t *cur = (*chain); |
2426 | *chain = cur->next; |
2427 | g_free(cur); |
2428 | } |
2429 | way->node_chain = NULL; |
2430 | |
2431 | if(!permanently) { |
2432 | printf("mark way #%ld as deleted\n", way->id); |
2433 | way->flags |= OSM_FLAG_DELETED; |
2434 | } else { |
2435 | printf("permanently delete way #%ld\n", way->id); |
2436 | |
2437 | /* remove it from the chain */ |
2438 | way_t **cway = &osm->way; |
2439 | int found = 0; |
2440 | |
2441 | while(*cway) { |
2442 | if(*cway == way) { |
2443 | found++; |
2444 | *cway = (*cway)->next; |
2445 | |
2446 | osm_way_free(way); |
2447 | } else |
2448 | cway = &((*cway)->next); |
2449 | } |
2450 | g_assert(found == 1); |
2451 | } |
2452 | } |
2453 | |
2454 | void osm_way_revert(way_t *way) { |
2455 | node_chain_t *new = NULL; |
2456 | |
2457 | /* walk old chain first to last */ |
2458 | node_chain_t *old = way->node_chain; |
2459 | while(old) { |
2460 | node_chain_t *next = old->next; |
2461 | |
2462 | /* and prepend each node to the new chain */ |
2463 | old->next = new; |
2464 | new = old; |
2465 | |
2466 | old = next; |
2467 | } |
2468 | |
2469 | way->node_chain = new; |
2470 | } |
2471 | |
2472 | node_t *osm_way_get_first_node(way_t *way) { |
2473 | node_chain_t *chain = way->node_chain; |
2474 | if(!chain) return NULL; |
2475 | return chain->node; |
2476 | } |
2477 | |
2478 | node_t *osm_way_get_last_node(way_t *way) { |
2479 | node_chain_t *chain = way->node_chain; |
2480 | |
2481 | while(chain && chain->next) chain=chain->next; |
2482 | |
2483 | if(!chain) return NULL; |
2484 | |
2485 | return chain->node; |
2486 | } |
2487 | |
2488 | void osm_way_rotate(way_t *way, gint offset) { |
2489 | if(!offset) return; |
2490 | |
2491 | /* needs at least two nodes to work properly */ |
2492 | g_assert(way->node_chain); |
2493 | g_assert(way->node_chain->next); |
2494 | |
2495 | while(offset--) { |
2496 | node_chain_t *chain = way->node_chain; |
2497 | chain->node->ways--; // reduce way count of old start/end node |
2498 | |
2499 | /* move all nodes ahead one chain element ... */ |
2500 | while(chain->next) { |
2501 | chain->node = chain->next->node; |
2502 | chain = chain->next; |
2503 | } |
2504 | |
2505 | /* ... and make last one same as first one */ |
2506 | chain->node = way->node_chain->node; |
2507 | chain->node->ways++; // increase way count of new start/end node |
2508 | } |
2509 | } |
2510 | |
2511 | tag_t *osm_tags_copy(tag_t *src_tag, gboolean update_creator) { |
2512 | tag_t *new_tags = NULL; |
2513 | tag_t **dst_tag = &new_tags; |
2514 | |
2515 | while(src_tag) { |
2516 | *dst_tag = g_new0(tag_t, 1); |
2517 | (*dst_tag)->key = g_strdup(src_tag->key); |
2518 | if(update_creator && (strcasecmp(src_tag->key, "created_by") == 0)) |
2519 | (*dst_tag)->value = g_strdup(PACKAGE " v" VERSION); |
2520 | else |
2521 | (*dst_tag)->value = g_strdup(src_tag->value); |
2522 | |
2523 | dst_tag = &(*dst_tag)->next; |
2524 | src_tag = src_tag->next; |
2525 | } |
2526 | |
2527 | return new_tags; |
2528 | } |
2529 | // vim:et:ts=8:sw=2:sts=2:ai |