Diff of /trunk/src/osm.c

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revision 40 by harbaum, Sun Jan 18 19:43:20 2009 UTC revision 78 by harbaum, Sun Feb 15 12:07:04 2009 UTC
# Line 17  Line 17 
17   * along with OSM2Go.  If not, see <http://www.gnu.org/licenses/>.   * along with OSM2Go.  If not, see <http://www.gnu.org/licenses/>.
18   */   */
19    
 /* xml parsing has a performance issue */  
 // #define OSM_DOM_PARSER  
 // #define OSM_STREAM_PARSER  
 #define OSM_QND_XML_PARSER  
   
20  #include <stdio.h>  #include <stdio.h>
21  #include <stdlib.h>  #include <stdlib.h>
22  #include <string.h>  #include <string.h>
# Line 58  static void osm_bounds_dump(bounds_t *bo Line 53  static void osm_bounds_dump(bounds_t *bo
53           bounds->ll_min.lon, bounds->ll_max.lon);           bounds->ll_min.lon, bounds->ll_max.lon);
54  }  }
55    
 #ifdef OSM_DOM_PARSER  
 static bounds_t *osm_parse_osm_bounds(osm_t *osm,  
                      xmlDocPtr doc, xmlNode *a_node) {  
   char *prop;  
   
   if(osm->bounds) {  
     errorf(NULL, "Doubly defined bounds");  
     return NULL;  
   }  
   
   bounds_t *bounds = g_new0(bounds_t, 1);  
   
   bounds->ll_min.lat = bounds->ll_min.lon = NAN;  
   bounds->ll_max.lat = bounds->ll_max.lon = NAN;  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"minlat"))) {  
     bounds->ll_min.lat = g_ascii_strtod(prop, NULL);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"maxlat"))) {  
     bounds->ll_max.lat = g_ascii_strtod(prop, NULL);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"minlon"))) {  
     bounds->ll_min.lon = g_ascii_strtod(prop, NULL);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"maxlon"))) {  
     bounds->ll_max.lon = g_ascii_strtod(prop, NULL);  
     xmlFree(prop);  
   }  
   
   if(isnan(bounds->ll_min.lat) || isnan(bounds->ll_min.lon) ||  
      isnan(bounds->ll_max.lat) || isnan(bounds->ll_max.lon)) {  
     errorf(NULL, "Invalid coordinate in bounds (%f/%f/%f/%f)",  
            bounds->ll_min.lat, bounds->ll_min.lon,  
            bounds->ll_max.lat, bounds->ll_max.lon);  
   
     osm_bounds_free(bounds);  
     return NULL;  
   }  
   
   
   /* calculate map zone which will be used as a reference for all */  
   /* drawing/projection later on */  
   pos_t center = { (bounds->ll_max.lat + bounds->ll_min.lat)/2,  
                    (bounds->ll_max.lon + bounds->ll_min.lon)/2 };  
   
   pos2lpos_center(&center, &bounds->center);  
   
   /* the scale is needed to accomodate for "streching" */  
   /* by the mercartor projection */  
   bounds->scale = cos(DEG2RAD(center.lat));  
   
   pos2lpos_center(&bounds->ll_min, &bounds->min);  
   bounds->min.x -= bounds->center.x;  
   bounds->min.y -= bounds->center.y;  
   bounds->min.x *= bounds->scale;  
   bounds->min.y *= bounds->scale;  
   
   pos2lpos_center(&bounds->ll_max, &bounds->max);  
   bounds->max.x -= bounds->center.x;  
   bounds->max.y -= bounds->center.y;  
   bounds->max.x *= bounds->scale;  
   bounds->max.y *= bounds->scale;  
   
   return bounds;  
 }  
 #endif  
   
56  /* ------------------------- user handling --------------------- */  /* ------------------------- user handling --------------------- */
57    
58  void osm_users_free(user_t *user) {  void osm_users_free(user_t *user) {
# Line 330  void osm_nodes_dump(node_t *node) { Line 252  void osm_nodes_dump(node_t *node) {
252    }    }
253  }  }
254    
 #ifdef OSM_DOM_PARSER  
 static node_t *osm_parse_osm_node(osm_t *osm,  
                           xmlDocPtr doc, xmlNode *a_node) {  
   xmlNode *cur_node = NULL;  
   
   /* allocate a new node structure */  
   node_t *node = g_new0(node_t, 1);  
   node->pos.lat = node->pos.lon = NAN;  
   
   char *prop;  
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"id"))) {  
     node->id = strtoul(prop, NULL, 10);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"lat"))) {  
     node->pos.lat = g_ascii_strtod(prop, NULL);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"lon"))) {  
     node->pos.lon = g_ascii_strtod(prop, NULL);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"user"))) {  
     node->user = osm_user(osm, prop);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"visible"))) {  
     node->visible = (strcasecmp(prop, "true") == 0);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"timestamp"))) {  
     node->time = convert_iso8601(prop);  
     xmlFree(prop);  
   }  
   
   /* scan for tags and attach a list of tags */  
   tag_t **tag = &node->tag;  
   for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {  
     if (cur_node->type == XML_ELEMENT_NODE) {  
       if(strcasecmp((char*)cur_node->name, "tag") == 0) {  
         /* attach tag to node */  
         *tag = osm_parse_osm_tag(osm, doc, cur_node);  
         if(*tag) tag = &((*tag)->next);  
       } else  
         printf("found unhandled osm/node/%s\n", cur_node->name);  
     }  
   }  
   
   pos2lpos(osm->bounds, &node->pos, &node->lpos);  
   
   return node;  
 }  
 #endif  
   
255  /* ------------------- way handling ------------------- */  /* ------------------- way handling ------------------- */
256    
257  void osm_node_chain_free(node_chain_t *node_chain) {  void osm_node_chain_free(node_chain_t *node_chain) {
# Line 481  node_chain_t *osm_parse_osm_way_nd(osm_t Line 344  node_chain_t *osm_parse_osm_way_nd(osm_t
344      node_chain_t *node_chain = g_new0(node_chain_t, 1);      node_chain_t *node_chain = g_new0(node_chain_t, 1);
345    
346      /* search matching node */      /* search matching node */
347      node_chain->node = osm->node;      node_chain->node = osm_get_node_by_id(osm, id);
     while(node_chain->node && node_chain->node->id != id)  
       node_chain->node = node_chain->node->next;  
   
348      if(!node_chain->node) printf("Node id %lu not found\n", id);      if(!node_chain->node) printf("Node id %lu not found\n", id);
349        else                  node_chain->node->ways++;
     if(node_chain->node)  
       node_chain->node->ways++;  
350    
351      xmlFree(prop);      xmlFree(prop);
352    
# Line 498  node_chain_t *osm_parse_osm_way_nd(osm_t Line 356  node_chain_t *osm_parse_osm_way_nd(osm_t
356    return NULL;    return NULL;
357  }  }
358    
 #ifdef OSM_DOM_PARSER  
 static way_t *osm_parse_osm_way(osm_t *osm,  
                           xmlDocPtr doc, xmlNode *a_node) {  
   xmlNode *cur_node = NULL;  
   
   /* allocate a new way structure */  
   way_t *way = g_new0(way_t, 1);  
   
   char *prop;  
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"id"))) {  
     way->id = strtoul(prop, NULL, 10);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"user"))) {  
     way->user = osm_user(osm, prop);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"visible"))) {  
     way->visible = (strcasecmp(prop, "true") == 0);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"timestamp"))) {  
     way->time = convert_iso8601(prop);  
     xmlFree(prop);  
   }  
   
   /* scan for tags/nodes and attach their lists */  
   tag_t **tag = &way->tag;  
   node_chain_t **node_chain = &way->node_chain;  
   
   for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {  
     if (cur_node->type == XML_ELEMENT_NODE) {  
       if(strcasecmp((char*)cur_node->name, "tag") == 0) {  
         /* attach tag to node */  
         *tag = osm_parse_osm_tag(osm, doc, cur_node);  
         if(*tag) tag = &((*tag)->next);  
       } else if(strcasecmp((char*)cur_node->name, "nd") == 0) {  
         *node_chain = osm_parse_osm_way_nd(osm, doc, cur_node);  
         if(*node_chain)  
           node_chain = &((*node_chain)->next);  
       } else  
         printf("found unhandled osm/node/%s\n", cur_node->name);  
     }  
   }  
   
   return way;  
 }  
 #endif  
   
359  /* ------------------- relation handling ------------------- */  /* ------------------- relation handling ------------------- */
360    
361  void osm_member_free(member_t *member) {  void osm_member_free(member_t *member) {
# Line 565  void osm_members_free(member_t *member) Line 371  void osm_members_free(member_t *member)
371    }    }
372  }  }
373    
374    void osm_relation_free(relation_t *relation) {
375      osm_tags_free(relation->tag);
376      osm_members_free(relation->member);
377    
378      g_free(relation);
379    }
380    
381  static void osm_relations_free(relation_t *relation) {  static void osm_relations_free(relation_t *relation) {
382    while(relation) {    while(relation) {
383      relation_t *next = relation->next;      relation_t *next = relation->next;
384        osm_relation_free(relation);
     osm_tags_free(relation->tag);  
     osm_members_free(relation->member);  
   
     g_free(relation);  
385      relation = next;      relation = next;
386    }    }
387  }  }
# Line 652  member_t *osm_parse_osm_relation_member( Line 461  member_t *osm_parse_osm_relation_member(
461    
462      case WAY:      case WAY:
463        /* search matching way */        /* search matching way */
464        member->way = osm->way;        member->way = osm_get_way_by_id(osm, id);
       while(member->way && member->way->id != id)  
         member->way = member->way->next;  
   
465        if(!member->way) {        if(!member->way) {
466          member->type = WAY_ID;          member->type = WAY_ID;
467          member->id = id;          member->id = id;
# Line 664  member_t *osm_parse_osm_relation_member( Line 470  member_t *osm_parse_osm_relation_member(
470    
471      case NODE:      case NODE:
472        /* search matching node */        /* search matching node */
473        member->node = osm->node;        member->node = osm_get_node_by_id(osm, id);
       while(member->node && member->node->id != id)  
         member->node = member->node->next;  
   
474        if(!member->node) {        if(!member->node) {
475          member->type = NODE_ID;          member->type = NODE_ID;
476          member->id = id;          member->id = id;
# Line 676  member_t *osm_parse_osm_relation_member( Line 479  member_t *osm_parse_osm_relation_member(
479    
480      case RELATION:      case RELATION:
481        /* search matching relation */        /* search matching relation */
482        member->relation = osm->relation;        member->relation = osm_get_relation_by_id(osm, id);
       while(member->relation && member->relation->id != id)  
         member->relation = member->relation->next;  
   
483        if(!member->relation) {        if(!member->relation) {
484          member->type = NODE_ID;          member->type = NODE_ID;
485          member->id = id;          member->id = id;
# Line 703  member_t *osm_parse_osm_relation_member( Line 503  member_t *osm_parse_osm_relation_member(
503    return member;    return member;
504  }  }
505    
506  #ifdef OSM_DOM_PARSER  /* ------------------ osm handling ----------------- */
 static relation_t *osm_parse_osm_relation(osm_t *osm,  
                           xmlDocPtr doc, xmlNode *a_node) {  
   xmlNode *cur_node = NULL;  
   
   /* allocate a new relation structure */  
   relation_t *relation = g_new0(relation_t, 1);  
   
   char *prop;  
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"id"))) {  
     relation->id = strtoul(prop, NULL, 10);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"user"))) {  
     relation->user = osm_user(osm, prop);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"visible"))) {  
     relation->visible = (strcasecmp(prop, "true") == 0);  
     xmlFree(prop);  
   }  
   
   if((prop = (char*)xmlGetProp(a_node, (unsigned char*)"timestamp"))) {  
     relation->time = convert_iso8601(prop);  
     xmlFree(prop);  
   }  
   
   /* scan for tags and attach a list of tags */  
   tag_t **tag = &relation->tag;  
   member_t **member = &relation->member;  
   
   for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {  
     if (cur_node->type == XML_ELEMENT_NODE) {  
       if(strcasecmp((char*)cur_node->name, "tag") == 0) {  
         /* attach tag to node */  
         *tag = osm_parse_osm_tag(osm, doc, cur_node);  
         if(*tag) tag = &((*tag)->next);  
       } else if(strcasecmp((char*)cur_node->name, "member") == 0) {  
         *member = osm_parse_osm_relation_member(osm, doc, cur_node);  
         if(*member) member = &((*member)->next);  
       } else  
         printf("found unhandled osm/node/%s\n", cur_node->name);  
     }  
   }  
   
   return relation;  
 }  
   
 /* ----------------------- generic xml handling -------------------------- */  
   
 /* parse loc entry */  
 static void osm_parse_osm(osm_t *osm, xmlDocPtr doc, xmlNode * a_node) {  
   xmlNode *cur_node = NULL;  
   
   for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {  
     if (cur_node->type == XML_ELEMENT_NODE) {  
       if(strcasecmp((char*)cur_node->name, "bounds") == 0)  
         osm->bounds = osm_parse_osm_bounds(osm, doc, cur_node);  
       else if(strcasecmp((char*)cur_node->name, "node") == 0) {  
         /* parse node and attach it to chain */  
         node_t *new = osm_parse_osm_node(osm, doc, cur_node);  
         if(new) {  
           node_t **node = &osm->node;  
   
 #ifdef OSM_SORT_ID  
           /* search chain of nodes */  
           while(*node && ((*node)->id < new->id))  
             node = &(*node)->next;  
 #endif  
   
 #ifdef OSM_SORT_LAST  
           while(*node) node = &(*node)->next;  
 #endif  
   
           /* insert into chain */  
           new->next = *node;  
           *node = new;  
         }  
       } else if(strcasecmp((char*)cur_node->name, "way") == 0) {  
         /* parse way and attach it to chain */  
         way_t *new = osm_parse_osm_way(osm, doc, cur_node);  
         if(new) {  
           way_t **way = &osm->way;  
   
 #ifdef OSM_SORT_ID  
           /* insert into chain */  
           while(*way && ((*way)->id < new->id))  
             way = &(*way)->next;  
 #endif  
   
 #ifdef OSM_SORT_LAST  
           while(*way) way = &(*way)->next;  
 #endif  
   
           /* insert into chain */  
           new->next = *way;  
           *way = new;  
         }  
       } else if(strcasecmp((char*)cur_node->name, "relation") == 0) {  
         /* parse relation and attach it to chain */  
         relation_t *new = osm_parse_osm_relation(osm, doc, cur_node);  
         if(new) {  
           relation_t **relation = &osm->relation;  
   
 #ifdef OSM_SORT_ID  
           /* search chain of ways */  
           while(*relation && ((*relation)->id < new->id))  
             relation = &(*relation)->next;  
 #endif  
   
 #ifdef OSM_SORT_LAST  
           while(*relation) relation = &(*relation)->next;  
 #endif  
   
           /* insert into chain */  
           new->next = *relation;  
           *relation = new;  
         }  
       } else  
         printf("found unhandled osm/%s\n", cur_node->name);  
   
     }  
   }  
 }  
   
 /* parse root element and search for "osm" */  
 static osm_t *osm_parse_root(xmlDocPtr doc, xmlNode * a_node) {  
   osm_t *osm;  
   xmlNode *cur_node = NULL;  
   
   /* allocate memory to hold osm file description */  
   osm = g_new0(osm_t, 1);  
507    
508    for (cur_node = a_node; cur_node; cur_node = cur_node->next) {  /* the two hash tables eat over 512kBytes memory and may thus be */
509      if (cur_node->type == XML_ELEMENT_NODE) {  /* freed at any time. osm2go can work without them (albeit slower) */
510        /* parse osm osm file ... */  static void hash_table_free(hash_table_t *table) {
511        if(strcasecmp((char*)cur_node->name, "osm") == 0)    if(!table) return;
512          osm_parse_osm(osm, doc, cur_node);  
513        else    int i;
514          printf("found unhandled %s\n", cur_node->name);    for(i=0;i<65536;i++) {
515        hash_item_t *item = table->hash[i];
516        while(item) {
517          hash_item_t *next = item->next;
518          g_free(item);
519          item = next;
520      }      }
521    }    }
   
   return osm;  
522  }  }
523    
524  static osm_t *osm_parse_doc(xmlDocPtr doc) {  void osm_hash_tables_free(osm_t *osm) {
525    osm_t *osm;    hash_table_free(osm->node_hash);
526      osm->node_hash = NULL;
527    /* Get the root element node */    hash_table_free(osm->way_hash);
528    xmlNode *root_element = xmlDocGetRootElement(doc);    osm->way_hash = NULL;
   
   osm = osm_parse_root(doc, root_element);  
   
   /*free the document */  
   xmlFreeDoc(doc);  
   
   /*  
    * Free the global variables that may  
    * have been allocated by the parser.  
    */  
   xmlCleanupParser();  
   
   return osm;  
529  }  }
 #endif  
   
 /* ------------------ osm handling ----------------- */  
530    
531  void osm_free(icon_t **icon, osm_t *osm) {  void osm_free(icon_t **icon, osm_t *osm) {
532    if(!osm) return;    if(!osm) return;
533    
534      osm_hash_tables_free(osm);
535    
536    if(osm->bounds)   osm_bounds_free(osm->bounds);    if(osm->bounds)   osm_bounds_free(osm->bounds);
537    if(osm->user)     osm_users_free(osm->user);    if(osm->user)     osm_users_free(osm->user);
538    if(osm->way)      osm_ways_free(osm->way);    if(osm->way)      osm_ways_free(osm->way);
# Line 893  void osm_dump(osm_t *osm) { Line 549  void osm_dump(osm_t *osm) {
549    osm_relations_dump(osm->relation);    osm_relations_dump(osm->relation);
550  }  }
551    
552  #ifdef OSM_STREAM_PARSER  /* -------------------------- stream parser ------------------- */
 /* -------------------------- stream parser tests ------------------- */  
553    
554  #include <libxml/xmlreader.h>  #include <libxml/xmlreader.h>
555    
# Line 1057  static node_t *process_node(xmlTextReade Line 712  static node_t *process_node(xmlTextReade
712    
713    pos2lpos(osm->bounds, &node->pos, &node->lpos);    pos2lpos(osm->bounds, &node->pos, &node->lpos);
714    
715      /* append node to end of hash table if present */
716      if(osm->node_hash) {
717        hash_item_t **item = &osm->node_hash->hash[ID2HASH(node->id)];
718        while(*item) item = &(*item)->next;
719    
720        *item = g_new0(hash_item_t, 1);
721        (*item)->data.node = node;
722      }
723    
724    /* just an empty element? then return the node as it is */    /* just an empty element? then return the node as it is */
725    if(xmlTextReaderIsEmptyElement(reader))    if(xmlTextReaderIsEmptyElement(reader))
726      return node;      return node;
# Line 1094  static node_chain_t *process_nd(xmlTextR Line 758  static node_chain_t *process_nd(xmlTextR
758      node_chain_t *node_chain = g_new0(node_chain_t, 1);      node_chain_t *node_chain = g_new0(node_chain_t, 1);
759    
760      /* search matching node */      /* search matching node */
761      node_chain->node = osm->node;      node_chain->node = osm_get_node_by_id(osm, id);
     while(node_chain->node && node_chain->node->id != id)  
       node_chain->node = node_chain->node->next;  
   
762      if(!node_chain->node) printf("Node id %lu not found\n", id);      if(!node_chain->node) printf("Node id %lu not found\n", id);
763        else                  node_chain->node->ways++;
     if(node_chain->node)  
       node_chain->node->ways++;  
764    
765      xmlFree(prop);      xmlFree(prop);
766    
# Line 1138  static way_t *process_way(xmlTextReaderP Line 797  static way_t *process_way(xmlTextReaderP
797      xmlFree(prop);      xmlFree(prop);
798    }    }
799    
800      /* append way to end of hash table if present */
801      if(osm->way_hash) {
802        hash_item_t **item = &osm->way_hash->hash[ID2HASH(way->id)];
803        while(*item) item = &(*item)->next;
804    
805        *item = g_new0(hash_item_t, 1);
806        (*item)->data.way = way;
807      }
808    
809    /* just an empty element? then return the way as it is */    /* just an empty element? then return the way as it is */
810    /* (this should in fact never happen as this would be a way without nodes) */    /* (this should in fact never happen as this would be a way without nodes) */
811    if(xmlTextReaderIsEmptyElement(reader))    if(xmlTextReaderIsEmptyElement(reader))
# Line 1193  static member_t *process_member(xmlTextR Line 861  static member_t *process_member(xmlTextR
861    
862      case WAY:      case WAY:
863        /* search matching way */        /* search matching way */
864        member->way = osm->way;        member->way = osm_get_way_by_id(osm, id);
       while(member->way && member->way->id != id)  
         member->way = member->way->next;  
   
865        if(!member->way) {        if(!member->way) {
866          member->type = WAY_ID;          member->type = WAY_ID;
867          member->id = id;          member->id = id;
# Line 1205  static member_t *process_member(xmlTextR Line 870  static member_t *process_member(xmlTextR
870    
871      case NODE:      case NODE:
872        /* search matching node */        /* search matching node */
873        member->node = osm->node;        member->node = osm_get_node_by_id(osm, id);
       while(member->node && member->node->id != id)  
         member->node = member->node->next;  
   
874        if(!member->node) {        if(!member->node) {
875          member->type = NODE_ID;          member->type = NODE_ID;
876          member->id = id;          member->id = id;
# Line 1217  static member_t *process_member(xmlTextR Line 879  static member_t *process_member(xmlTextR
879    
880      case RELATION:      case RELATION:
881        /* search matching relation */        /* search matching relation */
882        member->relation = osm->relation;        member->relation = osm_get_relation_by_id(osm, id);
       while(member->relation && member->relation->id != id)  
         member->relation = member->relation->next;  
   
883        if(!member->relation) {        if(!member->relation) {
884          member->type = NODE_ID;          member->type = NODE_ID;
885          member->id = id;          member->id = id;
# Line 1306  static relation_t *process_relation(xmlT Line 965  static relation_t *process_relation(xmlT
965  static osm_t *process_osm(xmlTextReaderPtr reader) {  static osm_t *process_osm(xmlTextReaderPtr reader) {
966    /* alloc osm structure */    /* alloc osm structure */
967    osm_t *osm = g_new0(osm_t, 1);    osm_t *osm = g_new0(osm_t, 1);
968      osm->node_hash = g_new0(hash_table_t, 1);
969      osm->way_hash = g_new0(hash_table_t, 1);
970    
971    node_t **node = &osm->node;    node_t **node = &osm->node;
972    way_t **way = &osm->way;    way_t **way = &osm->way;
# Line 1388  static osm_t *process_file(const char *f Line 1049  static osm_t *process_file(const char *f
1049    return osm;    return osm;
1050  }  }
1051    
1052  /* ----------------------- end of stream parser tests ------------------- */  /* ----------------------- end of stream parser ------------------- */
 #endif  
1053    
1054  #ifdef OSM_QND_XML_PARSER  #include <sys/time.h>
 /* -------------------------- qnd-xml parser tests ------------------- */  
1055    
1056  #ifdef USE_FLOAT  osm_t *osm_parse(char *filename) {
 #define GET_PROP_POS(a,b,c) qnd_xml_get_prop_float(a, b, c)  
 #else  
 #define GET_PROP_POS(a,b,c) qnd_xml_get_prop_double(a, b, c)  
 #endif  
1057    
1058  gboolean osm_bounds_cb(qnd_xml_stack_t *stack,    struct timeval start;
1059                         qnd_xml_attribute_t *attributes, gpointer data) {    gettimeofday(&start, NULL);
1060    
1061    /* get parent pointer */    LIBXML_TEST_VERSION;
   osm_t *osm = (osm_t*)stack->prev->userdata[0];  
1062    
1063    if(osm->bounds) {    // use stream parser
1064      errorf(NULL, "Doubly defined bounds");    osm_t *osm = process_file(filename);
1065      return FALSE;    xmlCleanupParser();
   }  
1066    
1067    bounds_t *bounds = osm->bounds = g_new0(bounds_t, 1);    struct timeval end;
1068      gettimeofday(&end, NULL);
1069    
1070    bounds->ll_min.lat = bounds->ll_min.lon = NAN;    printf("total parse time: %ldms\n",
1071    bounds->ll_max.lat = bounds->ll_max.lon = NAN;           (end.tv_usec - start.tv_usec)/1000 +
1072             (end.tv_sec - start.tv_sec)*1000);
1073    
1074    GET_PROP_POS(attributes, "minlat", &bounds->ll_min.lat);    return osm;
1075    GET_PROP_POS(attributes, "minlon", &bounds->ll_min.lon);  }
   GET_PROP_POS(attributes, "maxlat", &bounds->ll_max.lat);  
   GET_PROP_POS(attributes, "maxlon", &bounds->ll_max.lon);  
   
   if(isnan(bounds->ll_min.lat) || isnan(bounds->ll_min.lon) ||  
      isnan(bounds->ll_max.lat) || isnan(bounds->ll_max.lon)) {  
     errorf(NULL, "Invalid coordinate in bounds (%f/%f/%f/%f)",  
            bounds->ll_min.lat, bounds->ll_min.lon,  
            bounds->ll_max.lat, bounds->ll_max.lon);  
   
     osm_bounds_free(bounds);  
     osm->bounds = NULL;  
     return FALSE;  
   }  
   
   
   /* calculate map zone which will be used as a reference for all */  
   /* drawing/projection later on */  
   pos_t center = { (bounds->ll_max.lat + bounds->ll_min.lat)/2,  
                    (bounds->ll_max.lon + bounds->ll_min.lon)/2 };  
   
   pos2lpos_center(&center, &bounds->center);  
   
   /* the scale is needed to accomodate for "streching" */  
   /* by the mercartor projection */  
   bounds->scale = cos(DEG2RAD(center.lat));  
   
   pos2lpos_center(&bounds->ll_min, &bounds->min);  
   bounds->min.x -= bounds->center.x;  
   bounds->min.y -= bounds->center.y;  
   bounds->min.x *= bounds->scale;  
   bounds->min.y *= bounds->scale;  
   
   pos2lpos_center(&bounds->ll_max, &bounds->max);  
   bounds->max.x -= bounds->center.x;  
   bounds->max.y -= bounds->center.y;  
   bounds->max.x *= bounds->scale;  
   bounds->max.y *= bounds->scale;  
   
   return TRUE;  
 }  
   
 static gboolean osm_tag_cb(qnd_xml_stack_t *stack,  
                          qnd_xml_attribute_t *attributes, gpointer data) {  
   
   tag_t *tag = *(tag_t**)stack->prev->userdata[1] = g_new0(tag_t, 1);  
   
   tag->key = qnd_xml_get_prop_str(attributes, "k");  
   tag->value = qnd_xml_get_prop_str(attributes, "v");  
   
   if(!tag->key || !tag->value) {  
     printf("incomplete tag key/value %s/%s\n", tag->key, tag->value);  
     osm_tags_free(tag);  
     tag = NULL;  
   } else  
     stack->prev->userdata[1] = &tag->next;  
   
   return TRUE;  
 }  
   
 static gboolean osm_node_cb(qnd_xml_stack_t *stack,  
                      qnd_xml_attribute_t *attributes, gpointer data) {  
   
   osm_t *osm = (osm_t*)stack->prev->userdata[0];  
   
   /* allocate a new node structure. userdata[1] points to the current */  
   /* position a new node is to be stored */  
   node_t *node = *(node_t**)stack->prev->userdata[1] =  
     stack->userdata[0] = g_new0(node_t, 1);  
   stack->prev->userdata[1] = &node->next;  
   
   qnd_xml_get_prop_gulong(attributes, "id", &node->id);  
   GET_PROP_POS(attributes, "lat", &node->pos.lat);  
   GET_PROP_POS(attributes, "lon", &node->pos.lon);  
   node->user = osm_user(osm, qnd_xml_get_prop(attributes, "user"));  
   node->visible = qnd_xml_get_prop_is(attributes, "visible", "true");  
   node->time = convert_iso8601(qnd_xml_get_prop(attributes, "timestamp"));  
   
   pos2lpos(osm->bounds, &node->pos, &node->lpos);  
   
   /* store current tag pointer in userdata for fast access to current tag */  
   stack->userdata[1] = &node->tag;  
   
   return TRUE;  
 }  
   
 static gboolean osm_way_nd_cb(qnd_xml_stack_t *stack,  
                          qnd_xml_attribute_t *attributes, gpointer data) {  
   
   osm_t *osm = (osm_t*)stack->prev->prev->userdata[0];  
   
   item_id_t id;  
   if(qnd_xml_get_prop_gulong(attributes, "ref", &id)) {  
     /* allocate a new node_chain structure */  
     node_chain_t *node_chain = *(node_chain_t**)stack->prev->userdata[2] =  
       g_new0(node_chain_t, 1);  
   
     /* search matching node */  
     node_chain->node = osm->node;  
     while(node_chain->node && node_chain->node->id != id)  
       node_chain->node = node_chain->node->next;  
   
     if(!node_chain->node) printf("Node id %lu not found\n", id);  
   
     if(node_chain->node)  
       node_chain->node->ways++;  
   
     stack->prev->userdata[2] = &node_chain->next;  
   }  
   
   return TRUE;  
 }  
   
 gboolean osm_way_cb(qnd_xml_stack_t *stack,  
                     qnd_xml_attribute_t *attributes, gpointer data) {  
   
   osm_t *osm = (osm_t*)stack->prev->userdata[0];  
   
   /* allocate a new way structure. userdata[2] points to the current */  
   /* position a new way is to be stored in the way list */  
   way_t *way = *(way_t**)stack->prev->userdata[2] =  
     stack->userdata[0] = g_new0(way_t, 1);  
   stack->prev->userdata[2] = &way->next;  
   
   qnd_xml_get_prop_gulong(attributes, "id", &way->id);  
   way->user = osm_user(osm, qnd_xml_get_prop(attributes, "user"));  
   way->visible = qnd_xml_get_prop_is(attributes, "visible", "true");  
   way->time = convert_iso8601(qnd_xml_get_prop(attributes, "timestamp"));  
   
   /* store current tag and node_chain pointers in userdata for fast */  
   /* access to current tag/node_chain entry */  
   stack->userdata[1] = &way->tag;  
   stack->userdata[2] = &way->node_chain;  
   
   return TRUE;  
 }  
   
 static gboolean osm_rel_member_cb(qnd_xml_stack_t *stack,  
                          qnd_xml_attribute_t *attributes, gpointer data) {  
   
   osm_t *osm = (osm_t*)stack->prev->prev->userdata[0];  
   
   member_t *member = *(member_t**)stack->prev->userdata[2] =  
     g_new0(member_t, 1);  
   stack->prev->userdata[2] = &member->next;  
   member->type = ILLEGAL;  
   
   char *type = qnd_xml_get_prop(attributes, "type");  
   if(type) {  
     if(strcasecmp(type, "way") == 0)           member->type = WAY;  
     else if(strcasecmp(type, "node") == 0)     member->type = NODE;  
     else if(strcasecmp(type, "relation") == 0) member->type = RELATION;  
   }  
   
   item_id_t id;  
   if(qnd_xml_get_prop_gulong(attributes, "ref", &id)) {  
     switch(member->type) {  
     case ILLEGAL:  
       printf("Unable to store illegal type\n");  
       break;  
   
     case WAY:  
       /* search matching way */  
       member->way = osm->way;  
       while(member->way && member->way->id != id)  
         member->way = member->way->next;  
   
       if(!member->way) {  
         member->type = WAY_ID;  
         member->id = id;  
       }  
       break;  
   
     case NODE:  
       /* search matching node */  
       member->node = osm->node;  
       while(member->node && member->node->id != id)  
         member->node = member->node->next;  
   
       if(!member->node) {  
         member->type = NODE_ID;  
         member->id = id;  
       }  
       break;  
   
     case RELATION:  
       /* search matching relation */  
       member->relation = osm->relation;  
       while(member->relation && member->relation->id != id)  
         member->relation = member->relation->next;  
   
       if(!member->relation) {  
         member->type = NODE_ID;  
         member->id = id;  
       }  
       break;  
   
     case WAY_ID:  
     case NODE_ID:  
     case RELATION_ID:  
       break;  
     }  
   }  
   
   return TRUE;  
 }  
   
 gboolean osm_rel_cb(qnd_xml_stack_t *stack,  
                     qnd_xml_attribute_t *attributes, gpointer data) {  
   
   osm_t *osm = (osm_t*)stack->prev->userdata[0];  
   
   /* allocate a new relation structure. userdata[3] points to the current */  
   /* position a new relation is to be stored at in the relation list */  
   relation_t *relation = *(relation_t**)stack->prev->userdata[3] =  
     stack->userdata[0] = g_new0(relation_t, 1);  
   stack->prev->userdata[3] = &relation->next;  
   
   qnd_xml_get_prop_gulong(attributes, "id", &relation->id);  
   relation->user = osm_user(osm, qnd_xml_get_prop(attributes, "user"));  
   relation->visible = qnd_xml_get_prop_is(attributes, "visible", "true");  
   relation->time = convert_iso8601(qnd_xml_get_prop(attributes, "timestamp"));  
   
   /* store current tag and member pointers in userdata for fast access */  
   /* to current tag and members in their chains */  
   stack->userdata[1] = &relation->tag;  
   stack->userdata[2] = &relation->member;  
   
   return TRUE;  
 }  
   
 gboolean osm_cb(qnd_xml_stack_t *stack,  
                 qnd_xml_attribute_t *attributes, gpointer data) {  
   
   g_assert(!stack->userdata[0]);  
   
   /* also set parents (roots) userdata as it's the parsers return value */  
   osm_t *osm = stack->prev->userdata[0] =  
     stack->userdata[0] = g_new0(osm_t, 1);  
   
   /* store direct pointers for faster list access */  
   /* (otherwise we'd have to search the end of the lists for every item */  
   /* to be attached) */  
   stack->userdata[1] = &osm->node;  
   stack->userdata[2] = &osm->way;  
   stack->userdata[3] = &osm->relation;  
   
   return TRUE;  
 }  
   
   
 /* these structures describe the content qnd_xml expects while parsing */  
 qnd_xml_entry_t osm_node_tag = { "tag", osm_tag_cb, QND_XML_LEAF };  
   
 qnd_xml_entry_t osm_way_tag = { "tag", osm_tag_cb, QND_XML_LEAF };  
 qnd_xml_entry_t osm_way_nd = { "nd", osm_way_nd_cb, QND_XML_LEAF };  
   
 qnd_xml_entry_t osm_rel_tag = { "tag", osm_tag_cb, QND_XML_LEAF };  
 qnd_xml_entry_t osm_rel_member = { "member", osm_rel_member_cb, QND_XML_LEAF };  
   
 qnd_xml_entry_t osm_bounds = { "bounds", osm_bounds_cb, QND_XML_LEAF };  
   
 qnd_xml_entry_t *node_children[] = { &osm_node_tag },  
   osm_node = { "node", osm_node_cb, QND_XML_CHILDREN(node_children) };  
   
 qnd_xml_entry_t *way_children[] = { &osm_way_tag, &osm_way_nd },  
   osm_way = { "way", osm_way_cb, QND_XML_CHILDREN(way_children) };  
   
 qnd_xml_entry_t *rel_children[] = { &osm_rel_tag, &osm_rel_member },  
   osm_rel = { "rel", osm_rel_cb, QND_XML_CHILDREN(rel_children) };  
   
 /* the osm element */  
 qnd_xml_entry_t *osm_children[] = {  
   &osm_bounds, &osm_node, &osm_way, &osm_rel };  
 qnd_xml_entry_t osm = { "osm", osm_cb, QND_XML_CHILDREN(osm_children) };  
   
 /* the root element */  
 qnd_xml_entry_t *root_children[] = { &osm };  
 qnd_xml_entry_t root = { "<root>", NULL, QND_XML_CHILDREN(root_children) };  
   
 // gcc `pkg-config --cflags --libs glib-2.0` -o qnd_xml qnd_xml.c  
   
   
   
 /* ----------------------- end of qnd-xml parser tests ------------------- */  
 #endif  
   
   
 #include <sys/time.h>  
   
 osm_t *osm_parse(char *filename) {  
   
   struct timeval start;  
   gettimeofday(&start, NULL);  
   
   
 #ifdef OSM_STREAM_PARSER  
   LIBXML_TEST_VERSION;  
   
   // use stream parser  
   osm_t *osm = process_file(filename);  
   xmlCleanupParser();  
 #endif  
   
 #ifdef OSM_DOM_PARSER  
   LIBXML_TEST_VERSION;  
   
   // parse into a tree  
   /* parse the file and get the DOM */  
   xmlDoc *doc = NULL;  
   if ((doc = xmlReadFile(filename, NULL, 0)) == NULL) {  
     xmlErrorPtr errP = xmlGetLastError();  
     errorf(NULL, "While parsing \"%s\":\n\n%s", filename, errP->message);  
     return NULL;  
   }  
   
   osm_t *osm = osm_parse_doc(doc);  
 #endif  
   
 #ifdef OSM_QND_XML_PARSER  
   osm_t *osm = NULL;  
   if(!(osm = qnd_xml_parse(filename, &root, NULL))) {  
     errorf(NULL, "While parsing \"%s\"", filename);  
     return NULL;  
   }  
 #endif  
   
   struct timeval end;  
   gettimeofday(&end, NULL);  
   
   printf("total parse time: %ldms\n",  
          (end.tv_usec - start.tv_usec)/1000 +  
          (end.tv_sec - start.tv_sec)*1000);  
   
   return osm;  
 }  
1076    
1077  gboolean osm_sanity_check(GtkWidget *parent, osm_t *osm) {  gboolean osm_sanity_check(GtkWidget *parent, osm_t *osm) {
1078    if(!osm->bounds) {    if(!osm->bounds) {
# Line 2002  char *osm_generate_xml_relation(osm_t *o Line 1322  char *osm_generate_xml_relation(osm_t *o
1322    return osm_generate_xml(osm, RELATION, relation);    return osm_generate_xml(osm, RELATION, relation);
1323  }  }
1324    
1325    /* the following three functions are eating much CPU power */
1326    /* as they search the objects lists. Hashing is supposed to help */
1327  node_t *osm_get_node_by_id(osm_t *osm, item_id_t id) {  node_t *osm_get_node_by_id(osm_t *osm, item_id_t id) {
1328      if(id > 0 && osm->node_hash) {
1329        // use hash table if present
1330        hash_item_t *item = osm->node_hash->hash[ID2HASH(id)];
1331        while(item) {
1332          if(item->data.node->id == id)
1333            return item->data.node;
1334    
1335          item = item->next;
1336        }
1337      }
1338    
1339      /* use linear search if no hash tables are present or search in hash table failed */
1340    node_t *node = osm->node;    node_t *node = osm->node;
1341    while(node) {    while(node) {
1342      if(node->id == id)      if(node->id == id)
1343        return node;        return node;
1344    
1345      node = node->next;      node = node->next;
1346    }    }
1347    
1348    return NULL;    return NULL;
1349  }  }
1350    
1351  way_t *osm_get_way_by_id(osm_t *osm, item_id_t id) {  way_t *osm_get_way_by_id(osm_t *osm, item_id_t id) {
1352      if(id > 0 && osm->way_hash) {
1353        // use hash table if present
1354        hash_item_t *item = osm->way_hash->hash[ID2HASH(id)];
1355        while(item) {
1356          if(item->data.way->id == id)
1357            return item->data.way;
1358    
1359          item = item->next;
1360        }
1361      }
1362    
1363      /* use linear search if no hash tables are present or search on hash table failed */
1364    way_t *way = osm->way;    way_t *way = osm->way;
1365    while(way) {    while(way) {
1366      if(way->id == id)      if(way->id == id)
1367        return way;        return way;
1368    
1369      way = way->next;      way = way->next;
1370    }    }
1371    
1372    return NULL;    return NULL;
1373  }  }
1374    
1375  relation_t *osm_get_relation_by_id(osm_t *osm, item_id_t id) {  relation_t *osm_get_relation_by_id(osm_t *osm, item_id_t id) {
1376      // use linear search
1377    relation_t *relation = osm->relation;    relation_t *relation = osm->relation;
1378    while(relation) {    while(relation) {
1379      if(relation->id == id)      if(relation->id == id)
# Line 2082  item_id_t osm_new_node_id(osm_t *osm) { Line 1431  item_id_t osm_new_node_id(osm_t *osm) {
1431    return 0;    return 0;
1432  }  }
1433    
1434    item_id_t osm_new_relation_id(osm_t *osm) {
1435      item_id_t id = -1;
1436    
1437      while(TRUE) {
1438        gboolean found = FALSE;
1439        relation_t *relation = osm->relation;
1440        while(relation) {
1441          if(relation->id == id)
1442            found = TRUE;
1443    
1444          relation = relation->next;
1445        }
1446    
1447        /* no such id so far -> use it */
1448        if(!found) return id;
1449    
1450        id--;
1451      }
1452      g_assert(0);
1453      return 0;
1454    }
1455    
1456  node_t *osm_node_new(osm_t *osm, gint x, gint y) {  node_t *osm_node_new(osm_t *osm, gint x, gint y) {
1457    printf("Creating new node\n");    printf("Creating new node\n");
1458    
# Line 2118  void osm_node_attach(osm_t *osm, node_t Line 1489  void osm_node_attach(osm_t *osm, node_t
1489    *lnode = node;    *lnode = node;
1490  }  }
1491    
1492    void osm_node_restore(osm_t *osm, node_t *node) {
1493      printf("Restoring node\n");
1494    
1495      /* attach to end of node list */
1496      node_t **lnode = &osm->node;
1497      while(*lnode) lnode = &(*lnode)->next;
1498      *lnode = node;
1499    }
1500    
1501  way_t *osm_way_new(void) {  way_t *osm_way_new(void) {
1502    printf("Creating new way\n");    printf("Creating new way\n");
1503    
# Line 2394  void osm_way_remove_from_relation(osm_t Line 1774  void osm_way_remove_from_relation(osm_t
1774    }    }
1775  }  }
1776    
1777    relation_t *osm_relation_new(void) {
1778      printf("Creating new relation\n");
1779    
1780      relation_t *relation = g_new0(relation_t, 1);
1781      relation->visible = TRUE;
1782      relation->flags = OSM_FLAG_NEW;
1783      relation->time = time(NULL);
1784    
1785      /* add created_by tag */
1786      relation->tag = g_new0(tag_t, 1);
1787      relation->tag->key = g_strdup("created_by");
1788      relation->tag->value = g_strdup(PACKAGE " v" VERSION);
1789    
1790      return relation;
1791    }
1792    
1793    void osm_relation_attach(osm_t *osm, relation_t *relation) {
1794      printf("Attaching relation\n");
1795    
1796      relation->id = osm_new_relation_id(osm);
1797      relation->flags = OSM_FLAG_NEW;
1798    
1799      /* attach to end of relation list */
1800      relation_t **lrelation = &osm->relation;
1801      while(*lrelation) lrelation = &(*lrelation)->next;
1802      *lrelation = relation;
1803    }
1804    
1805    
1806  void osm_way_delete(osm_t *osm, icon_t **icon,  void osm_way_delete(osm_t *osm, icon_t **icon,
1807                      way_t *way, gboolean permanently) {                      way_t *way, gboolean permanently) {
1808    
# Line 2457  void osm_way_delete(osm_t *osm, icon_t * Line 1866  void osm_way_delete(osm_t *osm, icon_t *
1866    }    }
1867  }  }
1868    
1869    void osm_relation_delete(osm_t *osm, relation_t *relation,
1870                             gboolean permanently) {
1871    
1872      /* new relations aren't stored on the server and are just */
1873      /* deleted permanently */
1874      if(relation->flags & OSM_FLAG_NEW) {
1875        printf("About to delete NEW relation #%ld -> force permanent delete\n",
1876               relation->id);
1877        permanently = TRUE;
1878      }
1879    
1880      /* the deletion of a relation doesn't affect the members as they */
1881      /* don't have any reference to the relation they are part of */
1882    
1883      if(!permanently) {
1884        printf("mark relation #%ld as deleted\n", relation->id);
1885        relation->flags |= OSM_FLAG_DELETED;
1886      } else {
1887        printf("permanently delete relation #%ld\n", relation->id);
1888    
1889        /* remove it from the chain */
1890        relation_t **crelation = &osm->relation;
1891        int found = 0;
1892    
1893        while(*crelation) {
1894          if(*crelation == relation) {
1895            found++;
1896            *crelation = (*crelation)->next;
1897    
1898            osm_relation_free(relation);
1899          } else
1900            crelation = &((*crelation)->next);
1901        }
1902        g_assert(found == 1);
1903      }
1904    }
1905    
1906  void osm_way_revert(way_t *way) {  void osm_way_revert(way_t *way) {
1907    node_chain_t *new = NULL;    node_chain_t *new = NULL;
1908    
# Line 2532  tag_t *osm_tags_copy(tag_t *src_tag, gbo Line 1978  tag_t *osm_tags_copy(tag_t *src_tag, gbo
1978    
1979    return new_tags;    return new_tags;
1980  }  }
1981    
1982    /* return plain text of type */
1983    char *osm_type_string(type_t type) {
1984      const struct { type_t type; char *name; } types[] = {
1985        { ILLEGAL,     "illegal" },
1986        { NODE,        "node" },
1987        { WAY,         "way" },
1988        { RELATION,    "relation" },
1989        { NODE_ID,     "node id" },
1990        { WAY_ID,      "way id" },
1991        { RELATION_ID, "relation id" },
1992        { 0, NULL }
1993      };
1994    
1995      int i;
1996      for(i=0;types[i].name;i++)
1997        if(type == types[i].type)
1998          return types[i].name;
1999    
2000      return NULL;
2001    }
2002    
2003    char *osm_object_string(type_t type, void *object) {
2004      char *type_str = osm_type_string(type);
2005    
2006      if(!object)
2007        return g_strdup_printf("%s #<invalid>", type_str);
2008    
2009      switch(type) {
2010      case ILLEGAL:
2011        return g_strdup_printf("%s #<unspec>", type_str);
2012        break;
2013      case NODE:
2014        return g_strdup_printf("%s #%ld", type_str, ((node_t*)object)->id);
2015        break;
2016      case WAY:
2017        return g_strdup_printf("%s #%ld", type_str, ((way_t*)object)->id);
2018        break;
2019      case RELATION:
2020        return g_strdup_printf("%s #%ld", type_str, ((relation_t*)object)->id);
2021        break;
2022      case NODE_ID:
2023      case WAY_ID:
2024      case RELATION_ID:
2025        return g_strdup_printf("%s #%ld", type_str, ((item_id_t)object));
2026        break;
2027      }
2028      return NULL;
2029    }
2030    
2031    char *osm_id_string(type_t type, void *object) {
2032      if(!object) return NULL;
2033    
2034      switch(type) {
2035      case ILLEGAL:
2036        return NULL;
2037        break;
2038      case NODE:
2039        return g_strdup_printf("#%ld", ((node_t*)object)->id);
2040        break;
2041      case WAY:
2042        return g_strdup_printf("#%ld", ((way_t*)object)->id);
2043        break;
2044      case RELATION:
2045        return g_strdup_printf("#%ld", ((relation_t*)object)->id);
2046        break;
2047      case NODE_ID:
2048      case WAY_ID:
2049      case RELATION_ID:
2050        return g_strdup_printf("#%ld", ((item_id_t)object));
2051        break;
2052      }
2053      return NULL;
2054    }
2055    
2056    tag_t *osm_object_get_tags(type_t type, void *object) {
2057      if(!object) return NULL;
2058    
2059      switch(type) {
2060      case ILLEGAL:
2061        return NULL;
2062        break;
2063      case NODE:
2064        return ((node_t*)object)->tag;
2065        break;
2066      case WAY:
2067        return ((way_t*)object)->tag;
2068        break;
2069      case RELATION:
2070        return ((relation_t*)object)->tag;
2071        break;
2072      case NODE_ID:
2073      case WAY_ID:
2074      case RELATION_ID:
2075        return NULL;
2076        break;
2077      }
2078      return NULL;
2079    }
2080    
2081    
2082    gint osm_relation_members_num(relation_t *relation) {
2083      gint num = 0;
2084      member_t *member = relation->member;
2085      while(member) {
2086        num++;
2087        member = member->next;
2088      }
2089      return num;
2090    }
2091    
2092  // vim:et:ts=8:sw=2:sts=2:ai  // vim:et:ts=8:sw=2:sts=2:ai
Legend:
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  Added in v.78