navit/navit/route.c

/**
 * Navit, a modular navigation system.
 * Copyright (C) 2005-2008 Navit Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 */

/** @file
 * @brief Contains code related to finding a route from a position to a destination
 *
 * Routing uses segments, points and items. Items are items from the map: Streets, highways, etc.
 * Segments represent such items, or parts of it. Generally, a segment is a driveable path. An item
 * can be represented by more than one segment - in that case it is "segmented". Each segment has an
 * "offset" associated, that indicates at which position in a segmented item this segment is - a 
 * segment representing a not-segmented item always has the offset 1.
 * A point is located at the end of segments, often connecting several segments.
 * 
 * The code in this file will make navit find a route between a position and a destination.
 * It accomplishes this by first building a "route graph". This graph contains segments and
 * points.
 *
 * After building this graph in route_graph_build(), the function route_graph_flood() assigns every 
 * point and segment a "value" which represents the "costs" of traveling from this point to the
 * destination. This is done by Dijkstra's algorithm.
 *
 * When the graph is built a "route path" is created, which is a path in this graph from a given
 * position to the destination determined at time of building the graph.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if 0
#include <math.h>
#include <assert.h>
#include <unistd.h>
#include <sys/time.h>
#endif
#include "glib_slice.h"
#include "config.h"
#include "point.h"
#include "graphics.h"
#include "profile.h"
#include "coord.h"
#include "projection.h"
#include "item.h"
#include "map.h"
#include "mapset.h"
#include "route.h"
#include "track.h"
#include "transform.h"
#include "plugin.h"
#include "fib.h"
#include "event.h"
#include "callback.h"
#include "vehicle.h"
#include "vehicleprofile.h"
#include "roadprofile.h"
#include "debug.h"

#include "navit.h"

struct map_priv {
        struct route *route;
};

int debug_route=0;

/**
 * @brief A point in the route graph
 *
 * This represents a point in the route graph. A point usually connects two or more segments,
 * but there are also points which don't do that (e.g. at the end of a dead-end).
 */
struct route_graph_point {
        struct route_graph_point *hash_next; /**< Pointer to a chained hashlist of all route_graph_points with this hash */
        struct route_graph_segment *start;       /**< Pointer to a list of segments of which this point is the start. The links 
                                                                                  *  of this linked-list are in route_graph_segment->start_next.*/
        struct route_graph_segment *end;         /**< Pointer to a list of segments of which this pointer is the end. The links
                                                                                  *  of this linked-list are in route_graph_segment->end_next. */
        struct route_graph_segment *seg;         /**< Pointer to the segment one should use to reach the destination at
                                                                                  *  least costs */
        struct fibheap_el *el;                           /**< When this point is put on a Fibonacci heap, this is a pointer
                                                                                  *  to this point's heap-element */
        int value;                                                       /**< The cost at which one can reach the destination from this point on */
        struct coord c;                                          /**< Coordinates of this point */
        int flags;                                              /**< Flags for this point (eg traffic distortion) */
};

#define RP_TRAFFIC_DISTORTION 1
#define RP_TURN_RESTRICTION 2
#define RP_TURN_RESTRICTION_RESOLVED 4

/**
 * @brief A segment in the route graph or path
 *
 * This is a segment in the route graph or path. A segment represents a driveable way.
 */

struct route_segment_data {
        struct item item;                                                       /**< The item (e.g. street) that this segment represents. */
        int flags;
        int len;                                                                        /**< Length of this segment */
        /*NOTE: After a segment, various fields may follow, depending on what flags are set. Order of fields:
                                1.) maxspeed                    Maximum allowed speed on this segment. Present if AF_SPEED_LIMIT is set.
                                2.) offset                              If the item is segmented (i.e. represented by more than one segment), this
                                                                                indicates the position of this segment in the item. Present if AF_SEGMENTED is set.
         */
};


struct size_weight_limit {
        int width;
        int length;
        int height;
        int weight;
        int axle_weight;
};

#define RSD_OFFSET(x) *((int *)route_segment_data_field_pos((x), attr_offset))
#define RSD_MAXSPEED(x) *((int *)route_segment_data_field_pos((x), attr_maxspeed))
#define RSD_SIZE_WEIGHT(x) *((struct size_weight_limit *)route_segment_data_field_pos((x), attr_vehicle_width))
#define RSD_DANGEROUS_GOODS(x) *((int *)route_segment_data_field_pos((x), attr_vehicle_dangerous_goods))


struct route_graph_segment_data {
        struct item *item;
        int offset;
        int flags;
        int len;
        int maxspeed;
        struct size_weight_limit size_weight;
        int dangerous_goods;
};

/**
 * @brief A segment in the route graph
 *
 * This is a segment in the route graph. A segment represents a driveable way.
 */
struct route_graph_segment {
        struct route_graph_segment *next;                       /**< Linked-list pointer to a list of all route_graph_segments */
        struct route_graph_segment *start_next;         /**< Pointer to the next element in the list of segments that start at the 
                                                                                                 *  same point. Start of this list is in route_graph_point->start. */
        struct route_graph_segment *end_next;           /**< Pointer to the next element in the list of segments that end at the
                                                                                                 *  same point. Start of this list is in route_graph_point->end. */
        struct route_graph_point *start;                        /**< Pointer to the point this segment starts at. */
        struct route_graph_point *end;                          /**< Pointer to the point this segment ends at. */
        struct route_segment_data data;                         /**< The segment data */
};

/**
 * @brief A traffic distortion
 *
 * This is distortion in the traffic where you can't drive as fast as usual or have to wait for some time
 */
struct route_traffic_distortion {
        int maxspeed;                                   /**< Maximum speed possible in km/h */
        int delay;                                      /**< Delay in tenths of seconds */
};

/**
 * @brief A segment in the route path
 *
 * This is a segment in the route path.
 */
struct route_path_segment {
        struct route_path_segment *next;        /**< Pointer to the next segment in the path */
        struct route_segment_data *data;        /**< The segment data */
        int direction;                                          /**< Order in which the coordinates are ordered. >0 means "First
                                                                                 *  coordinate of the segment is the first coordinate of the item", <=0 
                                                                                 *  means reverse. */
        unsigned ncoords;                                       /**< How many coordinates does this segment have? */
        struct coord c[0];                                      /**< Pointer to the ncoords coordinates of this segment */
        /* WARNING: There will be coordinates following here, so do not create new fields after c! */
};

/**
 * @brief Usually represents a destination or position
 *
 * This struct usually represents a destination or position
 */
struct route_info {
        struct coord c;                  /**< The actual destination / position */
        struct coord lp;                 /**< The nearest point on a street to c */
        int pos;                                 /**< The position of lp within the coords of the street */
        int lenpos;                      /**< Distance between lp and the end of the street */
        int lenneg;                      /**< Distance between lp and the start of the street */
        int lenextra;                    /**< Distance between lp and c */
        int percent;                     /**< ratio of lenneg to lenght of whole street in percent */
        struct street_data *street; /**< The street lp is on */
        int street_direction;   /**< Direction of vehicle on street -1 = Negative direction, 1 = Positive direction, 0 = Unknown */
        int dir;                /**< Direction to take when following the route -1 = Negative direction, 1 = Positive direction */
};

/**
 * @brief A complete route path
 *
 * This structure describes a whole routing path
 */
struct route_path {
        int in_use;                                             /**< The path is in use and can not be updated */
        int update_required;                                    /**< The path needs to be updated after it is no longer in use */
        int updated;                                            /**< The path has only been updated */
        int path_time;                                          /**< Time to pass the path */
        int path_len;                                           /**< Length of the path */
        struct route_path_segment *path;                        /**< The first segment in the path, i.e. the segment one should 
                                                                                                 *  drive in next */
        struct route_path_segment *path_last;           /**< The last segment in the path */
        /* XXX: path_hash is not necessery now */
        struct item_hash *path_hash;                            /**< A hashtable of all the items represented by this route's segements */
        struct route_path *next;                                /**< Next route path in case of intermediate destinations */    
};

/**
 * @brief A complete route
 * 
 * This struct holds all information about a route.
 */

/**
 * @brief A complete route graph
 *
 * This structure describes a whole routing graph
 */
struct route_graph {
        int busy;                                       /**< The graph is being built */
        struct map_selection *sel;                      /**< The rectangle selection for the graph */
        struct mapset_handle *h;                        /**< Handle to the mapset */    
        struct map *m;                                  /**< Pointer to the currently active map */     
        struct map_rect *mr;                            /**< Pointer to the currently active map rectangle */
        struct vehicleprofile *vehicleprofile;          /**< The vehicle profile */
        struct callback *idle_cb;                       /**< Idle callback to process the graph */
        struct callback *done_cb;                       /**< Callback when graph is done */
        struct event_idle *idle_ev;                     /**< The pointer to the idle event */
        struct route_graph_segment *route_segments; /**< Pointer to the first route_graph_segment in the linked list of all segments */
#define HASH_SIZE 8192
        struct route_graph_point *hash[HASH_SIZE];      /**< A hashtable containing all route_graph_points in this graph */
};

#define HASHCOORD(c) ((((c)->x +(c)->y) * 2654435761UL) & (HASH_SIZE-1))

/**
 * @brief Iterator to iterate through all route graph segments in a route graph point
 *
 * This structure can be used to iterate through all route graph segments connected to a
 * route graph point. Use this with the rp_iterator_* functions.
 */
struct route_graph_point_iterator {
        struct route_graph_point *p;            /**< The route graph point whose segments should be iterated */
        int end;                                                        /**< Indicates if we have finished iterating through the "start" segments */
        struct route_graph_segment *next;       /**< The next segment to be returned */
};

struct attr_iter {
        union {
                GList *list;
        } u;
};

static struct route_info * route_find_nearest_street(struct vehicleprofile *vehicleprofile, struct mapset *ms, struct pcoord *c);
static struct route_graph_point *route_graph_get_point(struct route_graph *this, struct coord *c);
static void route_graph_update(struct route *this, struct callback *cb, int async);
static void route_graph_build_done(struct route_graph *rg, int cancel);
static struct route_path *route_path_new(struct route_graph *this, struct route_path *oldpath, struct route_info *pos, struct route_info *dst, struct vehicleprofile *profile);
static void route_process_street_graph(struct route_graph *this, struct item *item, struct vehicleprofile *profile);
static void route_graph_destroy(struct route_graph *this);
static void route_path_update(struct route *this, int cancel, int async);
static int route_time_seg(struct vehicleprofile *profile, struct route_segment_data *over, struct route_traffic_distortion *dist);
static void route_graph_flood(struct route_graph *this, struct route_info *dst, struct vehicleprofile *profile, struct callback *cb);
static void route_graph_reset(struct route_graph *this);


/**
 * @brief Returns the projection used for this route
 *
 * @param route The route to return the projection for
 * @return The projection used for this route
 */
static enum projection route_projection(struct route *route)
{
        struct street_data *street;
        struct route_info *dst=route_get_dst(route);
        if (!route->pos && !dst)
                return projection_none;
        street = route->pos ? route->pos->street : dst->street;
        if (!street || !street->item.map)
                return projection_none;
        return map_projection(street->item.map);
}

/**
 * @brief Creates a new graph point iterator 
 *
 * This function creates a new route graph point iterator, that can be used to
 * iterate through all segments connected to the point.
 *
 * @param p The route graph point to create the iterator from
 * @return A new iterator.
 */
static struct route_graph_point_iterator
rp_iterator_new(struct route_graph_point *p)
{
        struct route_graph_point_iterator it;

        it.p = p;
        if (p->start) {
                it.next = p->start;
                it.end = 0;
        } else {
                it.next = p->end;
                it.end = 1;
        }

        return it;
}

/**
 * @brief Gets the next segment connected to a route graph point from an iterator
 *
 * @param it The route graph point iterator to get the segment from
 * @return The next segment or NULL if there are no more segments
 */
static struct route_graph_segment
*rp_iterator_next(struct route_graph_point_iterator *it) 
{
        struct route_graph_segment *ret;

        ret = it->next;
        if (!ret) {
                return NULL;
        }

        if (!it->end) {
                if (ret->start_next) {
                        it->next = ret->start_next;
                } else {
                        it->next = it->p->end;
                        it->end = 1;
                }
        } else {
                it->next = ret->end_next;
        }

        return ret;
}

/**
 * @brief Checks if the last segment returned from a route_graph_point_iterator comes from the end
 *
 * @param it The route graph point iterator to be checked
 * @return 1 if the last segment returned comes from the end of the route graph point, 0 otherwise
 */
static int
rp_iterator_end(struct route_graph_point_iterator *it) {
        if (it->end && (it->next != it->p->end)) {
                return 1;
        } else {
                return 0;
        }
}

/**
 * @brief Destroys a route_path
 *
 * @param this The route_path to be destroyed
 */
static void
route_path_destroy(struct route_path *this, int recurse)
{
        struct route_path_segment *c,*n;
        struct route_path *next;
        while (this) {
                next=this->next;
                if (this->path_hash) {
                        item_hash_destroy(this->path_hash);
                        this->path_hash=NULL;
                }
                c=this->path;
                while (c) {
                        n=c->next;
                        g_free(c);
                        c=n;
                }
                this->in_use--;
                if (!this->in_use)
                        g_free(this);
                if (!recurse)
                        break;
                this=next;
        }
}

/**
 * @brief Creates a completely new route structure
 *
 * @param attrs Not used
 * @return The newly created route
 */
struct route *
route_new(struct attr *parent, struct attr **attrs)
{
        struct route *this=g_new0(struct route, 1);
        struct attr dest_attr;

        if (attr_generic_get_attr(attrs, NULL, attr_destination_distance, &dest_attr, NULL)) {
                this->destination_distance = dest_attr.u.num;
        } else {
                this->destination_distance = 50; // Default value
        }
        this->cbl2=callback_list_new();

        return this;
}

/**
 * @brief Checks if a segment is part of a roundabout
 *
 * This function checks if a segment is part of a roundabout.
 *
 * @param seg The segment to be checked
 * @param level How deep to scan the route graph
 * @param direction Set this to 1 if we're entering the segment through its end, to 0 otherwise
 * @param origin Used internally, set to NULL
 * @return 1 If a roundabout was detected, 0 otherwise
 */
static int
route_check_roundabout(struct route_graph_segment *seg, int level, int direction, struct route_graph_segment *origin)
{
        struct route_graph_point_iterator it,it2;
        struct route_graph_segment *cur;
        int count=0;

        if (!level) {
                return 0;
        }
        if (!direction && !(seg->data.flags & AF_ONEWAY)) {
                return 0;
        }
        if (direction && !(seg->data.flags & AF_ONEWAYREV)) {
                return 0;
        }
        if (seg->data.flags & AF_ROUNDABOUT_VALID)
                return 0;
        
        if (!origin) {
                origin = seg;
        }

        if (!direction) {
                it = rp_iterator_new(seg->end);
        } else {
                it = rp_iterator_new(seg->start);
        }
        it2=it;
        
        while ((cur = rp_iterator_next(&it2)))
                count++;

        if (count > 3)
                return 0;
        cur = rp_iterator_next(&it);
        while (cur) {
                if (cur == seg) {
                        cur = rp_iterator_next(&it);
                        continue;
                }

                if (cur->data.item.type != origin->data.item.type) {
                        // This street is of another type, can't be part of the roundabout
                        cur = rp_iterator_next(&it);
                        continue;
                }

                if (cur == origin) {
                        seg->data.flags |= AF_ROUNDABOUT;
                        return 1;
                }

                if (route_check_roundabout(cur, (level-1), rp_iterator_end(&it), origin)) {
                        seg->data.flags |= AF_ROUNDABOUT;
                        return 1;
                }

                cur = rp_iterator_next(&it);
        }

        return 0;
}

/**
 * @brief Sets the mapset of the route passwd
 *
 * @param this The route to set the mapset for
 * @param ms The mapset to set for this route
 */
void
route_set_mapset(struct route *this, struct mapset *ms)
{
        this->ms=ms;
}

/**
 * @brief Sets the vehicle profile of a route
 *
 * @param this The route to set the profile for
 * @param prof The vehicle profile
 */

void
route_set_profile(struct route *this, struct vehicleprofile *prof)
{
        if (this->vehicleprofile != prof) {
                this->vehicleprofile=prof;
                route_path_update(this, 1, 1);
        }
}

/**
 * @brief Returns the mapset of the route passed
 *
 * @param this The route to get the mapset of
 * @return The mapset of the route passed
 */
struct mapset *
route_get_mapset(struct route *this)
{
        return this->ms;
}

/**
 * @brief Returns the current position within the route passed
 *
 * @param this The route to get the position for
 * @return The position within the route passed
 */
struct route_info *
route_get_pos(struct route *this)
{
        return this->pos;
}

/**
 * @brief Returns the destination of the route passed
 *
 * @param this The route to get the destination for
 * @return The destination of the route passed
 */
struct route_info *
route_get_dst(struct route *this)
{
        struct route_info *dst=NULL;

        if (this->destinations)
                dst=g_list_last(this->destinations)->data;
        return dst;
}

/**
 * @brief Checks if the path is calculated for the route passed
 *
 * @param this The route to check
 * @return True if the path is calculated, false if not
 */
int
route_get_path_set(struct route *this)
{
        return this->path2 != NULL;
}

/**
 * @brief Checks if the route passed contains a certain item within the route path
 *
 * This function checks if a certain items exists in the path that navit will guide
 * the user to his destination. It does *not* check if this item exists in the route 
 * graph!
 *
 * @param this The route to check for this item
 * @param item The item to search for
 * @return True if the item was found, false if the item was not found or the route was not calculated
 */
int
route_contains(struct route *this, struct item *item)
{
        if (! this->path2 || !this->path2->path_hash)
                return 0;
        if (item_hash_lookup(this->path2->path_hash, item))
                return 1;
        if (! this->pos || !this->pos->street)
                return 0;
        return item_is_equal(this->pos->street->item, *item);

}

static struct route_info *
route_next_destination(struct route *this)
{
        if (!this->destinations)
                return NULL;
        return this->destinations->data;
}

/**
 * @brief Checks if a route has reached its destination
 *
 * @param this The route to be checked
 * @return True if the destination is "reached", false otherwise.
 */
int
route_destination_reached(struct route *this)
{
        struct street_data *sd = NULL;
        enum projection pro;
        struct route_info *dst=route_next_destination(this);

        if (!this->pos)
                return 0;
        if (!dst)
                return 0;
        
        sd = this->pos->street;

        if (!this->path2) {
                return 0;
        }

        if (!item_is_equal(this->pos->street->item, dst->street->item)) { 
                return 0;
        }

        if ((sd->flags & AF_ONEWAY) && (this->pos->lenneg >= dst->lenneg)) { // We would have to drive against the one-way road
                return 0;
        }
        if ((sd->flags & AF_ONEWAYREV) && (this->pos->lenpos >= dst->lenpos)) {
                return 0;
        }
        pro=route_projection(this);
        if (pro == projection_none)
                return 0;
         
        if (transform_distance(pro, &this->pos->c, &dst->lp) > this->destination_distance) {
                return 0;
        }

        if (g_list_next(this->destinations))    
                return 1;
        else
                return 2;
}

static struct route_info *
route_previous_destination(struct route *this)
{
        GList *l=g_list_find(this->destinations, this->current_dst);
        if (!l)
                return this->pos;
        l=g_list_previous(l);
        if (!l)
                return this->pos;
        return l->data;
}

static void
route_path_update_done(struct route *this, int new_graph)
{
        struct route_path *oldpath=this->path2;
        struct attr route_status;
        struct route_info *prev_dst;
        route_status.type=attr_route_status;
        if (this->path2 && (this->path2->in_use>1)) {
                this->path2->update_required=1+new_graph;
                return;
        }
        route_status.u.num=route_status_building_path;
        route_set_attr(this, &route_status);
        prev_dst=route_previous_destination(this);
        if (this->link_path) {
                this->path2=route_path_new(this->graph, NULL, prev_dst, this->current_dst, this->vehicleprofile);
                if (this->path2)
                    this->path2->next=oldpath;
        } else {
                this->path2=route_path_new(this->graph, oldpath, prev_dst, this->current_dst, this->vehicleprofile);
                if (oldpath && this->path2) {
                        this->path2->next=oldpath->next;
                        route_path_destroy(oldpath,0);
                }
        }
        if (this->path2) {
                struct route_path_segment *seg=this->path2->path;
                int path_time=0,path_len=0;
                while (seg) {
                        /* FIXME */
                        int seg_time=route_time_seg(this->vehicleprofile, seg->data, NULL);
                        if (seg_time == INT_MAX) {
                                dbg(1,"error\n");
                        } else
                                path_time+=seg_time;
                        path_len+=seg->data->len;
                        seg=seg->next;
                }
                this->path2->path_time=path_time;
                this->path2->path_len=path_len;
                if (prev_dst != this->pos) {
                        this->link_path=1;
                        this->current_dst=prev_dst;
                        route_graph_reset(this->graph);
                        route_graph_flood(this->graph, this->current_dst, this->vehicleprofile, this->route_graph_flood_done_cb);
                        return;
                }
                if (!new_graph && this->path2->updated)
                {
                        route_status.u.num=route_status_path_done_incremental;
                }
                else
                {
                        route_status.u.num=route_status_path_done_new;
                }
    }
        else
        { 
                        route_status.u.num=route_status_not_found; 
            dbg(0,"try harder\n"); 
            // Try to rebuild the graph with smaller roads 
            if (this->try_harder == 0)
                        {
                this->try_harder = 1; 
                route_graph_destroy(this->graph); 
                this->graph=NULL; 
                route_path_update(this, 1, 1);
            }
        }
        this->link_path=0;
        route_set_attr(this, &route_status);
}

/**
 * @brief Updates the route graph and the route path if something changed with the route
 *
 * This will update the route graph and the route path of the route if some of the
 * route's settings (destination, position) have changed. 
 * 
 * @attention For this to work the route graph has to be destroyed if the route's 
 * @attention destination is changed somewhere!
 *
 * @param this The route to update
 */
static void
route_path_update(struct route *this, int cancel, int async)
{
        dbg(1,"enter %d\n", cancel);
        if (! this->pos || ! this->destinations) {
                dbg(1,"destroy\n");
                route_path_destroy(this->path2,1);
                this->path2 = NULL;
                return;
        }
        if (cancel) {
                route_graph_destroy(this->graph);
                this->graph=NULL;
        }
        /* the graph is destroyed when setting the destination */
        if (this->graph) {
                if (this->graph->busy) {
                        dbg(1,"busy building graph\n");
                        return;
                }
                // we can try to update
                dbg(1,"try update\n");
                route_path_update_done(this, 0);
        } else {
                route_path_destroy(this->path2,1);
                this->path2 = NULL;
        }
        if (!this->graph || !this->path2) {
                dbg(1,"rebuild graph\n");
                if (! this->route_graph_flood_done_cb)
                        this->route_graph_flood_done_cb=callback_new_2(callback_cast(route_path_update_done), this, (long)1);
                dbg(1,"route_graph_update\n");
                route_graph_update(this, this->route_graph_flood_done_cb, async);
        }
}

/** 
 * @brief This will calculate all the distances stored in a route_info
 *
 * @param ri The route_info to calculate the distances for
 * @param pro The projection used for this route
 */
static void
route_info_distances(struct route_info *ri, enum projection pro)
{
        int npos=ri->pos+1;
        struct street_data *sd=ri->street;
        /* 0 1 2 X 3 4 5 6 pos=2 npos=3 count=7 0,1,2 3,4,5,6*/
        ri->lenextra=transform_distance(pro, &ri->lp, &ri->c);
        ri->lenneg=transform_polyline_length(pro, sd->c, npos)+transform_distance(pro, &sd->c[ri->pos], &ri->lp);
        ri->lenpos=transform_polyline_length(pro, sd->c+npos, sd->count-npos)+transform_distance(pro, &sd->c[npos], &ri->lp);
        if (ri->lenneg || ri->lenpos)
                ri->percent=(ri->lenneg*100)/(ri->lenneg+ri->lenpos);
        else
                ri->percent=50;
}

/**
 * @brief This sets the current position of the route passed
 *
 * This will set the current position of the route passed to the street that is nearest to the
 * passed coordinates. It also automatically updates the route.
 *
 * @param this The route to set the position of
 * @param pos Coordinates to set as position
 */
void
route_set_position(struct route *this, struct pcoord *pos)
{
        if (this->pos)
                route_info_free(this->pos);
        this->pos=NULL;
        this->pos=route_find_nearest_street(this->vehicleprofile, this->ms, pos);

        // If there is no nearest street, bail out.
        if (!this->pos) return;

        this->pos->street_direction=0;
        dbg(1,"this->pos=%p\n", this->pos);
        route_info_distances(this->pos, pos->pro);
        route_path_update(this, 0, 1);
}

/**
 * @brief Sets a route's current position based on coordinates from tracking
 *
 * @param this The route to set the current position of
 * @param tracking The tracking to get the coordinates from
 */
void
route_set_position_from_tracking(struct route *this, struct tracking *tracking, enum projection pro)
{
        struct coord *c;
        struct route_info *ret;
        struct street_data *sd;

        dbg(2,"enter\n");
        c=tracking_get_pos(tracking);
        ret=g_new0(struct route_info, 1);
        if (!ret) {
                printf("%s:Out of memory\n", __FUNCTION__);
                return;
        }
        if (this->pos)
                route_info_free(this->pos);
        this->pos=NULL;
        ret->c=*c;
        ret->lp=*c;
        ret->pos=tracking_get_segment_pos(tracking);
        ret->street_direction=tracking_get_street_direction(tracking);
        sd=tracking_get_street_data(tracking);
        if (sd) {
                ret->street=street_data_dup(sd);
                route_info_distances(ret, pro);
        }
        dbg(3,"position 0x%x,0x%x item 0x%x,0x%x direction %d pos %d lenpos %d lenneg %d\n",c->x,c->y,sd?sd->item.id_hi:0,sd?sd->item.id_lo:0,ret->street_direction,ret->pos,ret->lenpos,ret->lenneg);
        dbg(3,"c->x=0x%x, c->y=0x%x pos=%d item=(0x%x,0x%x)\n", c->x, c->y, ret->pos, ret->street?ret->street->item.id_hi:0, ret->street?ret->street->item.id_lo:0);
        dbg(3,"street 0=(0x%x,0x%x) %d=(0x%x,0x%x)\n", ret->street?ret->street->c[0].x:0, ret->street?ret->street->c[0].y:0, ret->street?ret->street->count-1:0, ret->street?ret->street->c[ret->street->count-1].x:0, ret->street?ret->street->c[ret->street->count-1].y:0);
        this->pos=ret;
        if (this->destinations) 
                route_path_update(this, 0, 1);
        dbg(2,"ret\n");
}

/* Used for debuging of route_rect, what routing sees */
struct map_selection *route_selection;

/**
 * @brief Returns a single map selection
 */
struct map_selection *
route_rect(int order, struct coord *c1, struct coord *c2, int rel, int abs)
{
        int dx,dy,sx=1,sy=1,d,m;
        struct map_selection *sel=g_new(struct map_selection, 1);
        if (!sel) {
                printf("%s:Out of memory\n", __FUNCTION__);
                return sel;
        }
        sel->order=order;
        sel->range.min=route_item_first;
        sel->range.max=route_item_last;
        dbg(1,"%p %p\n", c1, c2);
        dx=c1->x-c2->x;
        dy=c1->y-c2->y;
        if (dx < 0) {
                sx=-1;
                sel->u.c_rect.lu.x=c1->x;
                sel->u.c_rect.rl.x=c2->x;
        } else {
                sel->u.c_rect.lu.x=c2->x;
                sel->u.c_rect.rl.x=c1->x;
        }
        if (dy < 0) {
                sy=-1;
                sel->u.c_rect.lu.y=c2->y;
                sel->u.c_rect.rl.y=c1->y;
        } else {
                sel->u.c_rect.lu.y=c1->y;
                sel->u.c_rect.rl.y=c2->y;
        }
        if (dx*sx > dy*sy) 
                d=dx*sx;
        else
                d=dy*sy;
        m=d*rel/100+abs;
        sel->u.c_rect.lu.x-=m;
        sel->u.c_rect.rl.x+=m;
        sel->u.c_rect.lu.y+=m;
        sel->u.c_rect.rl.y-=m;
        sel->next=NULL;
        return sel;
}

/**
 * @brief Returns a list of map selections useable to create a route graph
 *
 * Returns a list of  map selections useable to get a  map rect from which items can be
 * retrieved to build a route graph. The selections are a rectangle with
 * c1 and c2 as two corners.
 *
 * @param c1 Corner 1 of the rectangle
 * @param c2 Corder 2 of the rectangle
 */
static struct map_selection *
route_calc_selection(struct coord *c, int count, int try_harder) 
{
        struct map_selection *ret,*sel;
        int i;
        struct coord_rect r;

        if (!count)
                return NULL;
        r.lu=c[0];
        r.rl=c[0];
        for (i = 1 ; i < count ; i++)
        {
                coord_rect_extend(&r, &c[i]);
        }

        if (routing_mode == 0)
        {
                // normal highway routing
                // sel=route_rect(4, &r.lu, &r.rl, 25, 0);
                sel=route_rect(try_harder?6:4, &r.lu, &r.rl, 25, 0);
        }
        else if (routing_mode == 1)
        {
                // normal roads routing (should take longer and use more roads)
                // sel=route_rect(6, &r.lu, &r.rl, 25, 0);
                sel=route_rect(try_harder?7:6, &r.lu, &r.rl, 25, 0);
        }
        else
        {
                // DEFAULT setting
                // normal highway routing
                // sel=route_rect(4, &r.lu, &r.rl, 25, 0);
                sel=route_rect(try_harder?6:4, &r.lu, &r.rl, 25, 0);
        }

        ret=sel;
        for (i = 0 ; i < count ; i++) {
                sel->next=route_rect(8, &c[i], &c[i], 0, 40000);
                sel=sel->next;
                sel->next=route_rect(18, &c[i], &c[i], 0, 10000);
                sel=sel->next;
        }
        /* route_selection=ret; */
        return ret;
}

/**
 * @brief Destroys a list of map selections
 *
 * @param sel Start of the list to be destroyed
 */
static void
route_free_selection(struct map_selection *sel)
{
        struct map_selection *next;
        while (sel) {
                next=sel->next;
                g_free(sel);
                sel=next;
        }
}


static void
route_clear_destinations(struct route *this_)
{
        g_list_foreach(this_->destinations, (GFunc)route_info_free, NULL);
        g_list_free(this_->destinations);
        this_->destinations=NULL;
}

/**
 * @brief Sets the destination of a route
 *
 * This sets the destination of a route to the street nearest to the coordinates passed
 * and updates the route.
 *
 * @param this The route to set the destination for
 * @param dst Coordinates to set as destination
 * @param count: Number of destinations (last one is final)
 * @param async: If set, do routing asynchronously
 */

void
route_set_destinations(struct route *this, struct pcoord *dst, int count, int async)
{
        struct attr route_status;
        struct route_info *dsti;
        int i;
        route_status.type=attr_route_status;

        profile(0,NULL);
        route_clear_destinations(this);
        if (dst && count) {
                for (i = 0 ; i < count ; i++) {
                        dsti=route_find_nearest_street(this->vehicleprofile, this->ms, &dst[i]);
                        if(dsti) {
                                route_info_distances(dsti, dst->pro);
                                this->destinations=g_list_append(this->destinations, dsti);
                        }
                }
                route_status.u.num=route_status_destination_set;
        } else  
                route_status.u.num=route_status_no_destination;
        callback_list_call_attr_1(this->cbl2, attr_destination, this);
        route_set_attr(this, &route_status);
        profile(1,"find_nearest_street");

        /* The graph has to be destroyed and set to NULL, otherwise route_path_update() doesn't work */
        route_graph_destroy(this->graph);
        this->graph=NULL;
        this->current_dst=route_get_dst(this);
        this->try_harder=0;
        route_path_update(this, 1, async);
        profile(0,"end");
}

int
route_get_destinations(struct route *this, struct pcoord *pc, int count)
{
        int ret=0;
        GList *l=this->destinations;
        while (l && ret < count) {
                struct route_info *dst=l->data;
                pc->x=dst->c.x;
                pc->y=dst->c.y;
                pc->pro=projection_mg; /* FIXME */
                pc++;
                ret++;
                l=g_list_next(l);
        }
        return ret;
}
 
void
route_set_destination(struct route *this, struct pcoord *dst, int async)
{
        route_set_destinations(this, dst, dst?1:0, async);
}

void
route_remove_waypoint(struct route *this)
{
        struct route_path *path=this->path2;
        this->destinations=g_list_remove(this->destinations,this->destinations->data);
        this->path2=this->path2->next;
        route_path_destroy(path,0);
        if (!this->destinations)
                return;
        route_graph_reset(this->graph);
        this->current_dst=this->destinations->data;
        route_graph_flood(this->graph, this->current_dst, this->vehicleprofile, this->route_graph_flood_done_cb);
        
}

/**
 * @brief Gets the route_graph_point with the specified coordinates
 *
 * @param this The route in which to search
 * @param c Coordinates to search for
 * @param last The last route graph point returned to iterate over multiple points with the same coordinates
 * @return The point at the specified coordinates or NULL if not found
 */
static struct route_graph_point *
route_graph_get_point_next(struct route_graph *this, struct coord *c, struct route_graph_point *last)
{
        struct route_graph_point *p;
        int seen=0,hashval=HASHCOORD(c);
        p=this->hash[hashval];
        while (p) {
                if (p->c.x == c->x && p->c.y == c->y) {
                        if (!last || seen)
                                return p;
                        if (p == last)
                                seen=1;
                }
                p=p->hash_next;
        }
        return NULL;
}

static struct route_graph_point *
route_graph_get_point(struct route_graph *this, struct coord *c)
{
        return route_graph_get_point_next(this, c, NULL);
}

/**
 * @brief Gets the last route_graph_point with the specified coordinates 
 *
 * @param this The route in which to search
 * @param c Coordinates to search for
 * @return The point at the specified coordinates or NULL if not found
 */
static struct route_graph_point *
route_graph_get_point_last(struct route_graph *this, struct coord *c)
{
        struct route_graph_point *p,*ret=NULL;
        int hashval=HASHCOORD(c);
        p=this->hash[hashval];
        while (p) {
                if (p->c.x == c->x && p->c.y == c->y)
                        ret=p;
                p=p->hash_next;
        }
        return ret;
}


/**
 * @brief Create a new point for the route graph with the specified coordinates
 *
 * @param this The route to insert the point into
 * @param f The coordinates at which the point should be created
 * @return The point created
 */

static struct route_graph_point *
route_graph_point_new(struct route_graph *this, struct coord *f)
{
        int hashval;
        struct route_graph_point *p;

        hashval=HASHCOORD(f);
        if (debug_route)
                printf("p (0x%x,0x%x)\n", f->x, f->y);
        p=g_slice_new0(struct route_graph_point);
        p->hash_next=this->hash[hashval];
        this->hash[hashval]=p;
        p->value=INT_MAX;
        p->c=*f;
        return p;
}

/**
 * @brief Inserts a point into the route graph at the specified coordinates
 *
 * This will insert a point into the route graph at the coordinates passed in f.
 * Note that the point is not yet linked to any segments.
 *
 * @param this The route to insert the point into
 * @param f The coordinates at which the point should be inserted
 * @return The point inserted or NULL on failure
 */
static struct route_graph_point *
route_graph_add_point(struct route_graph *this, struct coord *f)
{
        struct route_graph_point *p;

        p=route_graph_get_point(this,f);
        if (!p)
                p=route_graph_point_new(this,f);
        return p;
}

/**
 * @brief Frees all the memory used for points in the route graph passed
 *
 * @param this The route graph to delete all points from
 */
static void
route_graph_free_points(struct route_graph *this)
{
        struct route_graph_point *curr,*next;
        int i;
        for (i = 0 ; i < HASH_SIZE ; i++) {
                curr=this->hash[i];
                while (curr) {
                        next=curr->hash_next;
                        g_slice_free(struct route_graph_point, curr);
                        curr=next;
                }
                this->hash[i]=NULL;
        }
}

/**
 * @brief Resets all nodes
 *
 * @param this The route graph to reset
 */
static void
route_graph_reset(struct route_graph *this)
{
        struct route_graph_point *curr;
        int i;
        for (i = 0 ; i < HASH_SIZE ; i++) {
                curr=this->hash[i];
                while (curr) {
                        curr->value=INT_MAX;
                        curr->seg=NULL;
                        curr->el=NULL;
                        curr=curr->hash_next;
                }
        }
}

/**
 * @brief Returns the position of a certain field appended to a route graph segment
 *
 * This function returns a pointer to a field that is appended to a route graph
 * segment.
 *
 * @param seg The route graph segment the field is appended to
 * @param type Type of the field that should be returned
 * @return A pointer to a field of a certain type, or NULL if no such field is present
 */
static void *
route_segment_data_field_pos(struct route_segment_data *seg, enum attr_type type)
{
        unsigned char *ptr;
        
        ptr = ((unsigned char*)seg) + sizeof(struct route_segment_data);

        if (seg->flags & AF_SPEED_LIMIT) {
                if (type == attr_maxspeed) 
                        return (void*)ptr;
                ptr += sizeof(int);
        }
        if (seg->flags & AF_SEGMENTED) {
                if (type == attr_offset) 
                        return (void*)ptr;
                ptr += sizeof(int);
        }
        if (seg->flags & AF_SIZE_OR_WEIGHT_LIMIT) {
                if (type == attr_vehicle_width)
                        return (void*)ptr;
                ptr += sizeof(struct size_weight_limit);
        }
        if (seg->flags & AF_DANGEROUS_GOODS) {
                if (type == attr_vehicle_dangerous_goods)
                        return (void*)ptr;
                ptr += sizeof(int);
        }
        return NULL;
}

/**
 * @brief Calculates the size of a route_segment_data struct with given flags
 *
 * @param flags The flags of the route_segment_data
 */

static int
route_segment_data_size(int flags)
{
        int ret=sizeof(struct route_segment_data);
        if (flags & AF_SPEED_LIMIT)
                ret+=sizeof(int);
        if (flags & AF_SEGMENTED)
                ret+=sizeof(int);
        if (flags & AF_SIZE_OR_WEIGHT_LIMIT)
                ret+=sizeof(struct size_weight_limit);
        if (flags & AF_DANGEROUS_GOODS)
                ret+=sizeof(int);
        return ret;
}


static int
route_graph_segment_is_duplicate(struct route_graph_point *start, struct route_graph_segment_data *data)
{
        struct route_graph_segment *s;
        s=start->start;
        while (s) {
                if (item_is_equal(*data->item, s->data.item)) {
                        if (data->flags & AF_SEGMENTED) {
                                if (RSD_OFFSET(&s->data) == data->offset) {
                                        return 1;
                                }
                        } else
                                return 1;
                }
                s=s->start_next;
        } 
        return 0;
}

/**
 * @brief Inserts a new segment into the route graph
 *
 * This function performs a check if a segment for the item specified already exists, and inserts
 * a new segment representing this item if it does not.
 *
 * @param this The route graph to insert the segment into
 * @param start The graph point which should be connected to the start of this segment
 * @param end The graph point which should be connected to the end of this segment
 * @param len The length of this segment
 * @param item The item that is represented by this segment
 * @param flags Flags for this segment
 * @param offset If the item passed in "item" is segmented (i.e. divided into several segments), this indicates the position of this segment within the item
 * @param maxspeed The maximum speed allowed on this segment in km/h. -1 if not known.
 */
static void
route_graph_add_segment(struct route_graph *this, struct route_graph_point *start,
                        struct route_graph_point *end, struct route_graph_segment_data *data)
{
        struct route_graph_segment *s;
        int size;

        size = sizeof(struct route_graph_segment)-sizeof(struct route_segment_data)+route_segment_data_size(data->flags);
        s = g_slice_alloc0(size);
        if (!s) {
                printf("%s:Out of memory\n", __FUNCTION__);
                return;
        }
        s->start=start;
        s->start_next=start->start;
        start->start=s;
        s->end=end;
        s->end_next=end->end;
        end->end=s;
        dbg_assert(data->len >= 0);
        s->data.len=data->len;
        s->data.item=*data->item;
        s->data.flags=data->flags;

        if (data->flags & AF_SPEED_LIMIT) 
                RSD_MAXSPEED(&s->data)=data->maxspeed;
        if (data->flags & AF_SEGMENTED) 
                RSD_OFFSET(&s->data)=data->offset;
        if (data->flags & AF_SIZE_OR_WEIGHT_LIMIT) 
                RSD_SIZE_WEIGHT(&s->data)=data->size_weight;
        if (data->flags & AF_DANGEROUS_GOODS) 
                RSD_DANGEROUS_GOODS(&s->data)=data->dangerous_goods;

        s->next=this->route_segments;
        this->route_segments=s;
        if (debug_route)
                printf("l (0x%x,0x%x)-(0x%x,0x%x)\n", start->c.x, start->c.y, end->c.x, end->c.y);
}

/**
 * @brief Gets all the coordinates of an item
 *
 * This will get all the coordinates of the item i and return them in c,
 * up to max coordinates. Additionally it is possible to limit the coordinates
 * returned to all the coordinates of the item between the two coordinates
 * start end end.
 *
 * @important Make sure that whatever c points to has enough memory allocated
 * @important to hold max coordinates!
 *
 * @param i The item to get the coordinates of
 * @param c Pointer to memory allocated for holding the coordinates
 * @param max Maximum number of coordinates to return
 * @param start First coordinate to get
 * @param end Last coordinate to get
 * @return The number of coordinates returned
 */
static int get_item_seg_coords(struct item *i, struct coord *c, int max,
                struct coord *start, struct coord *end)
{
        struct map_rect *mr;
        struct item *item;
        int rc = 0, p = 0;
        struct coord c1;
        mr=map_rect_new(i->map, NULL);
        if (!mr)
                return 0;
        item = map_rect_get_item_byid(mr, i->id_hi, i->id_lo);
        if (item) {
                rc = item_coord_get(item, &c1, 1);
                while (rc && (c1.x != start->x || c1.y != start->y)) {
                        rc = item_coord_get(item, &c1, 1);
                }
                while (rc && p < max) {
                        c[p++] = c1;
                        if (c1.x == end->x && c1.y == end->y)
                                break;
                        rc = item_coord_get(item, &c1, 1);
                }
        }
        map_rect_destroy(mr);
        return p;
}

/**
 * @brief Returns and removes one segment from a path
 *
 * @param path The path to take the segment from
 * @param item The item whose segment to remove
 * @param offset Offset of the segment within the item to remove. If the item is not segmented this should be 1.
 * @return The segment removed
 */
static struct route_path_segment *
route_extract_segment_from_path(struct route_path *path, struct item *item,
                                                 int offset)
{
        int soffset;
        struct route_path_segment *sp = NULL, *s;
        s = path->path;
        while (s) {
                if (item_is_equal(s->data->item,*item)) {
                        if (s->data->flags & AF_SEGMENTED)
                                soffset=RSD_OFFSET(s->data);
                        else
                                soffset=1;
                        if (soffset == offset) {
                                if (sp) {
                                        sp->next = s->next;
                                        break;
                                } else {
                                        path->path = s->next;
                                        break;
                                }
                        }
                }
                sp = s;
                s = s->next;
        }
        if (s)
                item_hash_remove(path->path_hash, item);
        return s;
}

/**
 * @brief Adds a segment and the end of a path
 *
 * @param this The path to add the segment to
 * @param segment The segment to add
 */
static void
route_path_add_segment(struct route_path *this, struct route_path_segment *segment)
{
        if (!this->path)
                this->path=segment;
        if (this->path_last)
                this->path_last->next=segment;
        this->path_last=segment;
}

/**
 * @brief Adds a two coordinate line to a path
 *
 * This adds a new line to a path, creating a new segment for it.
 *
 * @param this The path to add the item to
 * @param start coordinate to add to the start of the item. If none should be added, make this NULL.
 * @param end coordinate to add to the end of the item. If none should be added, make this NULL.
 * @param len The length of the item
 */
static void
route_path_add_line(struct route_path *this, struct coord *start, struct coord *end, int len)
{
        int ccnt=2;
        struct route_path_segment *segment;
        int seg_size,seg_dat_size;

        dbg(1,"line from 0x%x,0x%x-0x%x,0x%x\n", start->x, start->y, end->x, end->y);
        seg_size=sizeof(*segment) + sizeof(struct coord) * ccnt;
        seg_dat_size=sizeof(struct route_segment_data);
        segment=g_malloc0(seg_size + seg_dat_size);
        segment->data=(struct route_segment_data *)((char *)segment+seg_size);
        segment->ncoords=ccnt;
        segment->direction=0;
        segment->c[0]=*start;
        segment->c[1]=*end;
        segment->data->len=len;
        route_path_add_segment(this, segment);
}

/**
 * @brief Inserts a new item into the path
 * 
 * This function does almost the same as "route_path_add_item()", but identifies
 * the item to add by a segment from the route graph. Another difference is that it "copies" the
 * segment from the route graph, i.e. if the item is segmented, only the segment passed in rgs will
 * be added to the route path, not all segments of the item. 
 *
 * The function can be sped up by passing an old path already containing this segment in oldpath - 
 * the segment will then be extracted from this old path. Please note that in this case the direction
 * parameter has no effect.
 *
 * @param this The path to add the item to
 * @param oldpath Old path containing the segment to be added. Speeds up the function, but can be NULL.
 * @param rgs Segment of the route graph that should be "copied" to the route path
 * @param dir Order in which to add the coordinates. See route_path_add_item()
 * @param pos  Information about start point if this is the first segment
 * @param dst  Information about end point if this is the last segment
 */

static int
route_path_add_item_from_graph(struct route_path *this, struct route_path *oldpath, struct route_graph_segment *rgs, int dir, struct route_info *pos, struct route_info *dst)
{
        struct route_path_segment *segment;
        int i, ccnt, extra=0, ret=0;
        struct coord *c,*cd,ca[2048];
        int offset=1;
        int seg_size,seg_dat_size;
        int len=rgs->data.len;
        if (rgs->data.flags & AF_SEGMENTED) 
                offset=RSD_OFFSET(&rgs->data);

        dbg(1,"enter (0x%x,0x%x) dir=%d pos=%p dst=%p\n", rgs->data.item.id_hi, rgs->data.item.id_lo, dir, pos, dst);
        if (oldpath) {
                segment=item_hash_lookup(oldpath->path_hash, &rgs->data.item);
                if (segment && segment->direction == dir) {
                        segment = route_extract_segment_from_path(oldpath, &rgs->data.item, offset);
                        if (segment) {
                                ret=1;
                                if (!pos)
                                        goto linkold;
                        }
                }
        }

        if (pos) {
                if (dst) {
                        extra=2;
                        if (dst->lenneg >= pos->lenneg) {
                                dir=1;
                                ccnt=dst->pos-pos->pos;
                                c=pos->street->c+pos->pos+1;
                                len=dst->lenneg-pos->lenneg;
                        } else {
                                dir=-1;
                                ccnt=pos->pos-dst->pos;
                                c=pos->street->c+dst->pos+1;
                                len=pos->lenneg-dst->lenneg;
                        }
                } else {
                        extra=1;
                        dbg(1,"pos dir=%d\n", dir);
                        dbg(1,"pos pos=%d\n", pos->pos);
                        dbg(1,"pos count=%d\n", pos->street->count);
                        if (dir > 0) {
                                c=pos->street->c+pos->pos+1;
                                ccnt=pos->street->count-pos->pos-1;
                                len=pos->lenpos;
                        } else {
                                c=pos->street->c;
                                ccnt=pos->pos+1;
                                len=pos->lenneg;
                        }
                }
                pos->dir=dir;
        } else  if (dst) {
                extra=1;
                dbg(1,"dst dir=%d\n", dir);
                dbg(1,"dst pos=%d\n", dst->pos);
                if (dir > 0) {
                        c=dst->street->c;
                        ccnt=dst->pos+1;
                        len=dst->lenpos;
                } else {
                        c=dst->street->c+dst->pos+1;
                        ccnt=dst->street->count-dst->pos-1;
                        len=dst->lenneg;
                }
        } else {
                ccnt=get_item_seg_coords(&rgs->data.item, ca, 2047, &rgs->start->c, &rgs->end->c);
                c=ca;
        }
        seg_size=sizeof(*segment) + sizeof(struct coord) * (ccnt + extra);
        seg_dat_size=route_segment_data_size(rgs->data.flags);
        segment=g_malloc0(seg_size + seg_dat_size);
        segment->data=(struct route_segment_data *)((char *)segment+seg_size);
        segment->direction=dir;
        cd=segment->c;
        if (pos && (c[0].x != pos->lp.x || c[0].y != pos->lp.y))
                *cd++=pos->lp;
        if (dir < 0)
                c+=ccnt-1;
        for (i = 0 ; i < ccnt ; i++) {
                *cd++=*c;
                c+=dir; 
        }
        segment->ncoords+=ccnt;
        if (dst && (cd[-1].x != dst->lp.x || cd[-1].y != dst->lp.y)) 
                *cd++=dst->lp;
        segment->ncoords=cd-segment->c;
        if (segment->ncoords <= 1) {
                g_free(segment);
                return 1;
        }

        /* We check if the route graph segment is part of a roundabout here, because this
         * only matters for route graph segments which form parts of the route path */
        if (!(rgs->data.flags & AF_ROUNDABOUT)) { // We identified this roundabout earlier
                route_check_roundabout(rgs, 13, (dir < 1), NULL);
        }

        memcpy(segment->data, &rgs->data, seg_dat_size);
linkold:
        segment->data->len=len;
        segment->next=NULL;
        item_hash_insert(this->path_hash,  &rgs->data.item, segment);

        route_path_add_segment(this, segment);

        return ret;
}

/**
 * @brief Destroys all segments of a route graph
 *
 * @param this The graph to destroy all segments from
 */
static void
route_graph_free_segments(struct route_graph *this)
{
        struct route_graph_segment *curr,*next;
        int size;
        curr=this->route_segments;
        while (curr) {
                next=curr->next;
                size = sizeof(struct route_graph_segment)-sizeof(struct route_segment_data)+route_segment_data_size(curr->data.flags);
                g_slice_free1(size, curr);
                curr=next;
        }
        this->route_segments=NULL;
}

/**
 * @brief Destroys a route graph
 * 
 * @param this The route graph to be destroyed
 */
static void
route_graph_destroy(struct route_graph *this)
{
        if (this) {
                route_graph_build_done(this, 1);
                route_graph_free_points(this);
                route_graph_free_segments(this);
                g_free(this);
        }
}

/**
 * @brief Returns the estimated speed on a segment
 *
 * This function returns the estimated speed to be driven on a segment, 0=not passable
 *
 * @param profile The routing preferences
 * @param over The segment which is passed
 * @param dist A traffic distortion if applicable
 * @return The estimated speed
 */
static int
route_seg_speed(struct vehicleprofile *profile, struct route_segment_data *over, struct route_traffic_distortion *dist)
{
        struct roadprofile *roadprofile=vehicleprofile_get_roadprofile(profile, over->item.type);
        int speed,maxspeed;
        if (!roadprofile || !roadprofile->route_weight)
                return 0;
        /* maxspeed_handling: 0=always, 1 only if maxspeed restricts the speed, 2 never */
        speed=roadprofile->route_weight;
        if (profile->maxspeed_handling != 2) {
                if (over->flags & AF_SPEED_LIMIT) {
                        maxspeed=RSD_MAXSPEED(over);
                        if (!profile->maxspeed_handling)
                                speed=maxspeed;
                } else
                        maxspeed=INT_MAX;
                if (dist && maxspeed > dist->maxspeed)
                        maxspeed=dist->maxspeed;
                if (maxspeed != INT_MAX && (profile->maxspeed_handling != 1 || maxspeed < speed))
                        speed=maxspeed;
        }
        if (over->flags & AF_DANGEROUS_GOODS) {
                if (profile->dangerous_goods & RSD_DANGEROUS_GOODS(over))
                        return 0;
        }
        if (over->flags & AF_SIZE_OR_WEIGHT_LIMIT) {
                struct size_weight_limit *size_weight=&RSD_SIZE_WEIGHT(over);
                if (size_weight->width != -1 && profile->width != -1 && profile->width > size_weight->width)
                        return 0;
                if (size_weight->height != -1 && profile->height != -1 && profile->height > size_weight->height)
                        return 0;
                if (size_weight->length != -1 && profile->length != -1 && profile->length > size_weight->length)
                        return 0;
                if (size_weight->weight != -1 && profile->weight != -1 && profile->weight > size_weight->weight)
                        return 0;
                if (size_weight->axle_weight != -1 && profile->axle_weight != -1 && profile->axle_weight > size_weight->axle_weight)
                        return 0;
        }
        return speed;
}

/**
 * @brief Returns the time needed to drive len on item
 *
 * This function returns the time needed to drive len meters on 
 * the item passed in item in tenth of seconds.
 *
 * @param profile The routing preferences
 * @param over The segment which is passed
 * @param dist A traffic distortion if applicable
 * @return The time needed to drive len on item in thenth of senconds
 */

static int
route_time_seg(struct vehicleprofile *profile, struct route_segment_data *over, struct route_traffic_distortion *dist)
{
        int speed=route_seg_speed(profile, over, dist);
        if (!speed)
                return INT_MAX;
        return over->len*36/speed+(dist ? dist->delay : 0);
}

static int
route_get_traffic_distortion(struct route_graph_segment *seg, struct route_traffic_distortion *ret)
{
        struct route_graph_point *start=seg->start;
        struct route_graph_point *end=seg->end;
        struct route_graph_segment *tmp,*found=NULL;
        tmp=start->start;
        while (tmp && !found) {
                if (tmp->data.item.type == type_traffic_distortion && tmp->start == start && tmp->end == end)
                        found=tmp;
                tmp=tmp->start_next;
        }
        tmp=start->end;
        while (tmp && !found) {
                if (tmp->data.item.type == type_traffic_distortion && tmp->end == start && tmp->start == end) 
                        found=tmp;
                tmp=tmp->end_next;
        }
        if (found) {
                ret->delay=found->data.len;
                if (found->data.flags & AF_SPEED_LIMIT)
                        ret->maxspeed=RSD_MAXSPEED(&found->data);
                else
                        ret->maxspeed=INT_MAX;
                return 1;
        }
        return 0;
}

static int
route_through_traffic_allowed(struct vehicleprofile *profile, struct route_graph_segment *seg)
{
        return (seg->data.flags & AF_THROUGH_TRAFFIC_LIMIT) == 0;
}

/**
 * @brief Returns the "costs" of driving from point from over segment over in direction dir
 *
 * @param profile The routing preferences
 * @param from The point where we are starting
 * @param over The segment we are using
 * @param dir The direction of segment which we are driving
 * @return The "costs" needed to drive len on item
 */  

static int
route_value_seg(struct vehicleprofile *profile, struct route_graph_point *from, struct route_graph_segment *over, int dir)
{
        int ret;
        struct route_traffic_distortion dist,*distp=NULL;
#if 0
        dbg(0,"flags 0x%x mask 0x%x flags 0x%x\n", over->flags, dir >= 0 ? profile->flags_forward_mask : profile->flags_reverse_mask, profile->flags);
#endif
        if ((over->data.flags & (dir >= 0 ? profile->flags_forward_mask : profile->flags_reverse_mask)) != profile->flags)
                return INT_MAX;
        if (dir > 0 && (over->start->flags & RP_TURN_RESTRICTION))
                return INT_MAX;
        if (dir < 0 && (over->end->flags & RP_TURN_RESTRICTION))
                return INT_MAX;
        if (from && from->seg == over)
                return INT_MAX;
        if ((over->start->flags & RP_TRAFFIC_DISTORTION) && (over->end->flags & RP_TRAFFIC_DISTORTION) && 
                route_get_traffic_distortion(over, &dist)) {
                        distp=&dist;
        }
        ret=route_time_seg(profile, &over->data, distp);
        if (ret == INT_MAX)
                return ret;
        if (!route_through_traffic_allowed(profile, over) && from && route_through_traffic_allowed(profile, from->seg)) 
                ret+=profile->through_traffic_penalty;
        return ret;
}

/**
 * @brief Adds a route distortion item to the route graph
 *
 * @param this The route graph to add to
 * @param item The item to add
 */
static void
route_process_traffic_distortion(struct route_graph *this, struct item *item)
{
        struct route_graph_point *s_pnt,*e_pnt;
        struct coord c,l;
        struct attr delay_attr, maxspeed_attr;
        struct route_graph_segment_data data;

        data.item=item;
        data.len=0;
        data.flags=0;
        data.offset=1;
        data.maxspeed = INT_MAX;

        if (item_coord_get(item, &l, 1)) {
                s_pnt=route_graph_add_point(this,&l);
                while (item_coord_get(item, &c, 1)) {
                        l=c;
                }
                e_pnt=route_graph_add_point(this,&l);
                s_pnt->flags |= RP_TRAFFIC_DISTORTION;
                e_pnt->flags |= RP_TRAFFIC_DISTORTION;
                if (item_attr_get(item, attr_maxspeed, &maxspeed_attr)) {
                        data.flags |= AF_SPEED_LIMIT;
                        data.maxspeed=maxspeed_attr.u.num;
                }
                if (item_attr_get(item, attr_delay, &delay_attr))
                        data.len=delay_attr.u.num;
                route_graph_add_segment(this, s_pnt, e_pnt, &data);
        }
}

/**
 * @brief Adds a route distortion item to the route graph
 *
 * @param this The route graph to add to
 * @param item The item to add
 */
static void
route_process_turn_restriction(struct route_graph *this, struct item *item)
{
        struct route_graph_point *pnt[4];
        struct coord c[5];
        int i,count;
        struct route_graph_segment_data data;

        count=item_coord_get(item, c, 5);
        if (count != 3 && count != 4) {
                dbg(0,"wrong count %d\n",count);
                return;
        }
        if (count == 4)
                return;
        for (i = 0 ; i < count ; i++) 
                pnt[i]=route_graph_add_point(this,&c[i]);
        dbg(1,"%s: (0x%x,0x%x)-(0x%x,0x%x)-(0x%x,0x%x) %p-%p-%p\n",item_to_name(item->type),c[0].x,c[0].y,c[1].x,c[1].y,c[2].x,c[2].y,pnt[0],pnt[1],pnt[2]);
        data.item=item;
        data.flags=0;
        data.len=0;
        route_graph_add_segment(this, pnt[0], pnt[1], &data);
        route_graph_add_segment(this, pnt[1], pnt[2], &data);
#if 1
        if (count == 4) {
                pnt[1]->flags |= RP_TURN_RESTRICTION;
                pnt[2]->flags |= RP_TURN_RESTRICTION;
                route_graph_add_segment(this, pnt[2], pnt[3], &data);
        } else 
                pnt[1]->flags |= RP_TURN_RESTRICTION;
#endif  
}

/**
 * @brief Adds an item to the route graph
 *
 * This adds an item (e.g. a street) to the route graph, creating as many segments as needed for a
 * segmented item.
 *
 * @param this The route graph to add to
 * @param item The item to add
 * @param profile               The vehicle profile currently in use
 */
static void
route_process_street_graph(struct route_graph *this, struct item *item, struct vehicleprofile *profile)
{
#ifdef AVOID_FLOAT
        int len=0;
#else
        double len=0;
#endif
        int segmented = 0;
        struct roadprofile *roadp;
        struct route_graph_point *s_pnt,*e_pnt;
        struct coord c,l;
        struct attr attr;
        struct route_graph_segment_data data;
        data.flags=0;
        data.offset=1;
        data.maxspeed=-1;
        data.item=item;

        roadp = vehicleprofile_get_roadprofile(profile, item->type);
        if (!roadp) {
                // Don't include any roads that don't have a road profile in our vehicle profile
                return;
        }

        if (item_coord_get(item, &l, 1)) {
                int *default_flags=item_get_default_flags(item->type);
                if (! default_flags)
                        return;
                if (item_attr_get(item, attr_flags, &attr)) {
                        data.flags = attr.u.num;
                        if (data.flags & AF_SEGMENTED)
                                segmented = 1;
                } else
                        data.flags = *default_flags;
                

                if (data.flags & AF_SPEED_LIMIT) {
                        if (item_attr_get(item, attr_maxspeed, &attr)) 
                                data.maxspeed = attr.u.num;
                }
                if (data.flags & AF_DANGEROUS_GOODS) {
                        if (item_attr_get(item, attr_vehicle_dangerous_goods, &attr)) 
                                data.dangerous_goods = attr.u.num;
                        else 
                                data.flags &= ~AF_DANGEROUS_GOODS;
                }
                if (data.flags & AF_SIZE_OR_WEIGHT_LIMIT) {
                        if (item_attr_get(item, attr_vehicle_width, &attr))
                                data.size_weight.width=attr.u.num;
                        else
                                data.size_weight.width=-1;
                        if (item_attr_get(item, attr_vehicle_height, &attr))
                                data.size_weight.height=attr.u.num;
                        else
                                data.size_weight.height=-1;
                        if (item_attr_get(item, attr_vehicle_length, &attr))
                                data.size_weight.length=attr.u.num;
                        else
                                data.size_weight.length=-1;
                        if (item_attr_get(item, attr_vehicle_weight, &attr))
                                data.size_weight.weight=attr.u.num;
                        else
                                data.size_weight.weight=-1;
                        if (item_attr_get(item, attr_vehicle_axle_weight, &attr))
                                data.size_weight.axle_weight=attr.u.num;
                        else
                                data.size_weight.axle_weight=-1;
                }

                s_pnt=route_graph_add_point(this,&l);
                if (!segmented) {
                        while (item_coord_get(item, &c, 1)) {
                                len+=transform_distance(map_projection(item->map), &l, &c);
                                l=c;
                        }
                        e_pnt=route_graph_add_point(this,&l);
                        dbg_assert(len >= 0);
                        data.len=len;
                        if (!route_graph_segment_is_duplicate(s_pnt, &data))
                                route_graph_add_segment(this, s_pnt, e_pnt, &data);
                } else {
                        int isseg,rc;
                        int sc = 0;
                        do {
                                isseg = item_coord_is_node(item);
                                rc = item_coord_get(item, &c, 1);
                                if (rc) {
                                        len+=transform_distance(map_projection(item->map), &l, &c);
                                        l=c;
                                        if (isseg) {
                                                e_pnt=route_graph_add_point(this,&l);
                                                data.len=len;
                                                if (!route_graph_segment_is_duplicate(s_pnt, &data))
                                                        route_graph_add_segment(this, s_pnt, e_pnt, &data);
                                                data.offset++;
                                                s_pnt=route_graph_add_point(this,&l);
                                                len = 0;
                                        }
                                }
                        } while(rc);
                        e_pnt=route_graph_add_point(this,&l);
                        dbg_assert(len >= 0);
                        sc++;
                        data.len=len;
                        if (!route_graph_segment_is_duplicate(s_pnt, &data))
                                route_graph_add_segment(this, s_pnt, e_pnt, &data);
                }
        }
}

static struct route_graph_segment *
route_graph_get_segment(struct route_graph *graph, struct street_data *sd, struct route_graph_segment *last)
{
        struct route_graph_point *start=NULL;
        struct route_graph_segment *s;
        int seen=0;

        while ((start=route_graph_get_point_next(graph, &sd->c[0], start))) {
                s=start->start;
                while (s) {
                        if (item_is_equal(sd->item, s->data.item)) {
                                if (!last || seen)
                                        return s;
                                if (last == s)
                                        seen=1;
                        }
                        s=s->start_next;
                }
        }
        return NULL;
}

/**
 * @brief Calculates the routing costs for each point
 *
 * This function is the heart of routing. It assigns each point in the route graph a
 * cost at which one can reach the destination from this point on. Additionally it assigns
 * each point a segment one should follow from this point on to reach the destination at the
 * stated costs.
 * 
 * This function uses Dijkstra's algorithm to do the routing. To understand it you should have a look
 * at this algorithm.
 */
static void
route_graph_flood(struct route_graph *this, struct route_info *dst, struct vehicleprofile *profile, struct callback *cb)
{
        struct route_graph_point *p_min;
        struct route_graph_segment *s=NULL;
        int min,new,old,val;
        struct fibheap *heap; /* This heap will hold all points with "temporarily" calculated costs */

        heap = fh_makekeyheap();   

        while ((s=route_graph_get_segment(this, dst->street, s))) {
                val=route_value_seg(profile, NULL, s, -1);
                if (val != INT_MAX) {
                        val=val*(100-dst->percent)/100;
                        s->end->seg=s;
                        s->end->value=val;
                        s->end->el=fh_insertkey(heap, s->end->value, s->end);
                }
                val=route_value_seg(profile, NULL, s, 1);
                if (val != INT_MAX) {
                        val=val*dst->percent/100;
                        s->start->seg=s;
                        s->start->value=val;
                        s->start->el=fh_insertkey(heap, s->start->value, s->start);
                }
        }
        for (;;) {
                p_min=fh_extractmin(heap); /* Starting Dijkstra by selecting the point with the minimum costs on the heap */
                if (! p_min) /* There are no more points with temporarily calculated costs, Dijkstra has finished */
                        break;
                min=p_min->value;
                if (debug_route)
                        printf("extract p=%p free el=%p min=%d, 0x%x, 0x%x\n", p_min, p_min->el, min, p_min->c.x, p_min->c.y);
                p_min->el=NULL; /* This point is permanently calculated now, we've taken it out of the heap */
                s=p_min->start;
                while (s) { /* Iterating all the segments leading away from our point to update the points at their ends */
                        val=route_value_seg(profile, p_min, s, -1);
                        if (val != INT_MAX && !item_is_equal(s->data.item,p_min->seg->data.item)) {
                                new=min+val;
                                if (debug_route)
                                        printf("begin %d len %d vs %d (0x%x,0x%x)\n",new,val,s->end->value, s->end->c.x, s->end->c.y);
                                if (new < s->end->value) { /* We've found a less costly way to reach the end of s, update it */
                                        s->end->value=new;
                                        s->end->seg=s;
                                        if (! s->end->el) {
                                                if (debug_route)
                                                        printf("insert_end p=%p el=%p val=%d ", s->end, s->end->el, s->end->value);
                                                s->end->el=fh_insertkey(heap, new, s->end);
                                                if (debug_route)
                                                        printf("el new=%p\n", s->end->el);
                                        }
                                        else {
                                                if (debug_route)
                                                        printf("replace_end p=%p el=%p val=%d\n", s->end, s->end->el, s->end->value);
                                                fh_replacekey(heap, s->end->el, new);
                                        }
                                }
                                if (debug_route)
                                        printf("\n");
                        }
                        s=s->start_next;
                }
                s=p_min->end;
                while (s) { /* Doing the same as above with the segments leading towards our point */
                        val=route_value_seg(profile, p_min, s, 1);
                        if (val != INT_MAX && !item_is_equal(s->data.item,p_min->seg->data.item)) {
                                new=min+val;
                                if (debug_route)
                                        printf("end %d len %d vs %d (0x%x,0x%x)\n",new,val,s->start->value,s->start->c.x, s->start->c.y);
                                if (new < s->start->value) {
                                        old=s->start->value;
                                        s->start->value=new;
                                        s->start->seg=s;
                                        if (! s->start->el) {
                                                if (debug_route)
                                                        printf("insert_start p=%p el=%p val=%d ", s->start, s->start->el, s->start->value);
                                                s->start->el=fh_insertkey(heap, new, s->start);
                                                if (debug_route)
                                                        printf("el new=%p\n", s->start->el);
                                        }
                                        else {
                                                if (debug_route)
                                                        printf("replace_start p=%p el=%p val=%d\n", s->start, s->start->el, s->start->value);
                                                fh_replacekey(heap, s->start->el, new);
                                        }
                                }
                                if (debug_route)
                                        printf("\n");
                        }
                        s=s->end_next;
                }
        }
        fh_deleteheap(heap);
        callback_call_0(cb);
        dbg(1,"return\n");
}

/**
 * @brief Starts an "offroad" path
 *
 * This starts a path that is not located on a street. It creates a new route path
 * adding only one segment, that leads from pos to dest, and which is not associated with an item.
 *
 * @param this Not used
 * @param pos The starting position for the new path
 * @param dst The destination of the new path
 * @param dir Not used
 * @return The new path
 */
static struct route_path *
route_path_new_offroad(struct route_graph *this, struct route_info *pos, struct route_info *dst)
{
        struct route_path *ret;

        ret=g_new0(struct route_path, 1);
        ret->in_use=1;
        ret->path_hash=item_hash_new();
        route_path_add_line(ret, &pos->c, &dst->c, pos->lenextra+dst->lenextra);
        ret->updated=1;

        return ret;
}

/**
 * @brief Returns a coordinate at a given distance
 *
 * This function returns the coordinate, where the user will be if he
 * follows the current route for a certain distance.
 *
 * @param this_ The route we're driving upon
 * @param dist The distance in meters
 * @return The coordinate where the user will be in that distance
 */
struct coord 
route_get_coord_dist(struct route *this_, int dist)
{
        int d,l,i,len;
        int dx,dy;
        double frac;
        struct route_path_segment *cur;
        struct coord ret;
        enum projection pro=route_projection(this_);
        struct route_info *dst=route_get_dst(this_);

        d = dist;

        if (!this_->path2 || pro == projection_none) {
                return this_->pos->c;
        }
        
        ret = this_->pos->c;
        cur = this_->path2->path;
        while (cur) {
                if (cur->data->len < d) {
                        d -= cur->data->len;
                } else {
                        for (i=0; i < (cur->ncoords-1); i++) {
                                l = d;
                                len = (int)transform_polyline_length(pro, (cur->c + i), 2);
                                d -= len;
                                if (d <= 0) { 
                                        // We interpolate a bit here...
                                        frac = (double)l / len;
                                        
                                        dx = (cur->c + i + 1)->x - (cur->c + i)->x;
                                        dy = (cur->c + i + 1)->y - (cur->c + i)->y;
                                        
                                        ret.x = (cur->c + i)->x + (frac * dx);
                                        ret.y = (cur->c + i)->y + (frac * dy);
                                        return ret;
                                }
                        }
                        return cur->c[(cur->ncoords-1)];
                }
                cur = cur->next;
        }

        return dst->c;
}

/**
 * @brief Creates a new route path
 * 
 * This creates a new non-trivial route. It therefore needs the routing information created by route_graph_flood, so
 * make sure to run route_graph_flood() after changing the destination before using this function.
 *
 * @param this The route graph to create the route from
 * @param oldpath (Optional) old path which may contain parts of the new part - this speeds things up a bit. May be NULL.
 * @param pos The starting position of the route
 * @param dst The destination of the route
 * @param preferences The routing preferences
 * @return The new route path
 */
static struct route_path *
route_path_new(struct route_graph *this, struct route_path *oldpath, struct route_info *pos, struct route_info *dst, struct vehicleprofile *profile)
{
        struct route_graph_segment *first,*s=NULL,*s1=NULL,*s2=NULL;
        struct route_graph_point *start;
        struct route_info *posinfo, *dstinfo;
        int segs=0;
        int val1=INT_MAX,val2=INT_MAX;
        int val,val1_new,val2_new;
        struct route_path *ret;

        if (! pos->street || ! dst->street) {
                dbg(0,"pos or dest not set\n");
                return NULL;
        }

        if (profile->mode == 2 || (profile->mode == 0 && pos->lenextra + dst->lenextra > transform_distance(map_projection(pos->street->item.map), &pos->c, &dst->c)))
                return route_path_new_offroad(this, pos, dst);
        while ((s=route_graph_get_segment(this, pos->street, s))) {
                val=route_value_seg(profile, NULL, s, 1);
                if (val != INT_MAX && s->end->value != INT_MAX) {
                        val=val*(100-pos->percent)/100;
                        val1_new=s->end->value+val;
                        if (val1_new < val1) {
                                val1=val1_new;
                                s1=s;
                        }
                }
                val=route_value_seg(profile, NULL, s, -1);
                if (val != INT_MAX && s->start->value != INT_MAX) {
                        val=val*pos->percent/100;
                        val2_new=s->start->value+val;
                        if (val2_new < val2) {
                                val2=val2_new;
                                s2=s;
                        }
                }
        }
        if (val1 == INT_MAX && val2 == INT_MAX) {
                dbg(0,"no route found, pos blocked\n");
                return NULL;
        }
        if (val1 == val2) {
                val1=s1->end->value;
                val2=s2->start->value;
        }
        if (val1 < val2) {
                start=s1->start;
                s=s1;
        } else {
                start=s2->end;
                s=s2;
        }
        ret=g_new0(struct route_path, 1);
        ret->in_use=1;
        ret->updated=1;
        if (pos->lenextra) 
                route_path_add_line(ret, &pos->c, &pos->lp, pos->lenextra);
        ret->path_hash=item_hash_new();
        dstinfo=NULL;
        posinfo=pos;
        first=s;
        while (s && !dstinfo) { /* following start->seg, which indicates the least costly way to reach our destination */
                segs++;
#if 0
                printf("start->value=%d 0x%x,0x%x\n", start->value, start->c.x, start->c.y);
#endif
                if (s->start == start) {                
                        if (item_is_equal(s->data.item, dst->street->item) && (s->end->seg == s || !posinfo))
                                dstinfo=dst;
                        if (!route_path_add_item_from_graph(ret, oldpath, s, 1, posinfo, dstinfo))
                                ret->updated=0;
                        start=s->end;
                } else {
                        if (item_is_equal(s->data.item, dst->street->item) && (s->start->seg == s || !posinfo))
                                dstinfo=dst;
                        if (!route_path_add_item_from_graph(ret, oldpath, s, -1, posinfo, dstinfo))
                                ret->updated=0;
                        start=s->start;
                }
                posinfo=NULL;
                s=start->seg;
        }
        if (dst->lenextra) 
                route_path_add_line(ret, &dst->lp, &dst->c, dst->lenextra);
        dbg(1, "%d segments\n", segs);
        return ret;
}

static int
route_graph_build_next_map(struct route_graph *rg)
{
        do {
                rg->m=mapset_next(rg->h, 2);
                if (! rg->m)
                        return 0;
                map_rect_destroy(rg->mr);
                rg->mr=map_rect_new(rg->m, rg->sel);
        } while (!rg->mr);
                
        return 1;
}


static int
is_turn_allowed(struct route_graph_point *p, struct route_graph_segment *from, struct route_graph_segment *to)
{
        struct route_graph_point *prev,*next;
        struct route_graph_segment *tmp1,*tmp2;
        if (item_is_equal(from->data.item, to->data.item))
                return 0;
        if (from->start == p)
                prev=from->end;
        else
                prev=from->start;
        if (to->start == p)
                next=to->end;
        else
                next=to->start;
        tmp1=p->end;
        while (tmp1) {
                if (tmp1->start->c.x == prev->c.x && tmp1->start->c.y == prev->c.y &&
                        (tmp1->data.item.type == type_street_turn_restriction_no ||
                        tmp1->data.item.type == type_street_turn_restriction_only)) {
                        tmp2=p->start;
                        dbg(1,"found %s (0x%x,0x%x) (0x%x,0x%x)-(0x%x,0x%x) %p-%p\n",item_to_name(tmp1->data.item.type),tmp1->data.item.id_hi,tmp1->data.item.id_lo,tmp1->start->c.x,tmp1->start->c.y,tmp1->end->c.x,tmp1->end->c.y,tmp1->start,tmp1->end);
                        while (tmp2) {
                                dbg(1,"compare %s (0x%x,0x%x) (0x%x,0x%x)-(0x%x,0x%x) %p-%p\n",item_to_name(tmp2->data.item.type),tmp2->data.item.id_hi,tmp2->data.item.id_lo,tmp2->start->c.x,tmp2->start->c.y,tmp2->end->c.x,tmp2->end->c.y,tmp2->start,tmp2->end);
                                if (item_is_equal(tmp1->data.item, tmp2->data.item)) 
                                        break;
                                tmp2=tmp2->start_next;
                        }
                        dbg(1,"tmp2=%p\n",tmp2);
                        if (tmp2) {
                                dbg(1,"%s tmp2->end=%p next=%p\n",item_to_name(tmp1->data.item.type),tmp2->end,next);
                        }
                        if (tmp1->data.item.type == type_street_turn_restriction_no && tmp2 && tmp2->end->c.x == next->c.x && tmp2->end->c.y == next->c.y) {
                                dbg(1,"from 0x%x,0x%x over 0x%x,0x%x to 0x%x,0x%x not allowed (no)\n",prev->c.x,prev->c.y,p->c.x,p->c.y,next->c.x,next->c.y);
                                return 0;
                        }
                        if (tmp1->data.item.type == type_street_turn_restriction_only && tmp2 && (tmp2->end->c.x != next->c.x || tmp2->end->c.y != next->c.y)) {
                                dbg(1,"from 0x%x,0x%x over 0x%x,0x%x to 0x%x,0x%x not allowed (only)\n",prev->c.x,prev->c.y,p->c.x,p->c.y,next->c.x,next->c.y);
                                return 0;
                        }
                }
                tmp1=tmp1->end_next;
        }
        dbg(1,"from 0x%x,0x%x over 0x%x,0x%x to 0x%x,0x%x allowed\n",prev->c.x,prev->c.y,p->c.x,p->c.y,next->c.x,next->c.y);
        return 1;
}

static void
route_graph_clone_segment(struct route_graph *this, struct route_graph_segment *s, struct route_graph_point *start, struct route_graph_point *end, int flags)
{
        struct route_graph_segment_data data;
        data.flags=s->data.flags|flags;
        data.offset=1;
        data.maxspeed=-1;
        data.item=&s->data.item;
        data.len=s->data.len+1;
        if (s->data.flags & AF_SPEED_LIMIT)
                data.maxspeed=RSD_MAXSPEED(&s->data);
        if (s->data.flags & AF_SEGMENTED) 
                data.offset=RSD_OFFSET(&s->data);
        dbg(1,"cloning segment from %p (0x%x,0x%x) to %p (0x%x,0x%x)\n",start,start->c.x,start->c.y, end, end->c.x, end->c.y);
        route_graph_add_segment(this, start, end, &data);
}

static void
route_graph_process_restriction_segment(struct route_graph *this, struct route_graph_point *p, struct route_graph_segment *s, int dir)
{
        struct route_graph_segment *tmp;
        struct route_graph_point *pn;
        struct coord c=p->c;
        int dx=0;
        int dy=0;
        c.x+=dx;
        c.y+=dy;
        dbg(1,"From %s %d,%d\n",item_to_name(s->data.item.type),dx,dy);
        pn=route_graph_point_new(this, &c);
        if (dir > 0) { /* going away */
                dbg(1,"other 0x%x,0x%x\n",s->end->c.x,s->end->c.y);
                if (s->data.flags & AF_ONEWAY) {
                        dbg(1,"Not possible\n");
                        return;
                }
                route_graph_clone_segment(this, s, pn, s->end, AF_ONEWAYREV);
        } else { /* coming in */
                dbg(1,"other 0x%x,0x%x\n",s->start->c.x,s->start->c.y);
                if (s->data.flags & AF_ONEWAYREV) {
                        dbg(1,"Not possible\n");
                        return;
                }
                route_graph_clone_segment(this, s, s->start, pn, AF_ONEWAY);
        }
        tmp=p->start;
        while (tmp) {
                if (tmp != s && tmp->data.item.type != type_street_turn_restriction_no &&
                        tmp->data.item.type != type_street_turn_restriction_only &&
                        !(tmp->data.flags & AF_ONEWAYREV) && is_turn_allowed(p, s, tmp)) {
                        route_graph_clone_segment(this, tmp, pn, tmp->end, AF_ONEWAY);
                        dbg(1,"To start %s\n",item_to_name(tmp->data.item.type));
                }
                tmp=tmp->start_next;
        }
        tmp=p->end;
        while (tmp) {
                if (tmp != s && tmp->data.item.type != type_street_turn_restriction_no &&
                        tmp->data.item.type != type_street_turn_restriction_only &&
                        !(tmp->data.flags & AF_ONEWAY) && is_turn_allowed(p, s, tmp)) {
                        route_graph_clone_segment(this, tmp, tmp->start, pn, AF_ONEWAYREV);
                        dbg(1,"To end %s\n",item_to_name(tmp->data.item.type));
                }
                tmp=tmp->end_next;
        }
}

static void
route_graph_process_restriction_point(struct route_graph *this, struct route_graph_point *p)
{
        struct route_graph_segment *tmp;
        tmp=p->start;
        dbg(1,"node 0x%x,0x%x\n",p->c.x,p->c.y);
        while (tmp) {
                if (tmp->data.item.type != type_street_turn_restriction_no &&
                        tmp->data.item.type != type_street_turn_restriction_only)
                        route_graph_process_restriction_segment(this, p, tmp, 1);
                tmp=tmp->start_next;
        }
        tmp=p->end;
        while (tmp) {
                if (tmp->data.item.type != type_street_turn_restriction_no &&
                        tmp->data.item.type != type_street_turn_restriction_only)
                        route_graph_process_restriction_segment(this, p, tmp, -1);
                tmp=tmp->end_next;
        }
        p->flags |= RP_TURN_RESTRICTION_RESOLVED;
}

static void
route_graph_process_restrictions(struct route_graph *this)
{
        struct route_graph_point *curr;
        int i;
        dbg(1,"enter\n");
        for (i = 0 ; i < HASH_SIZE ; i++) {
                curr=this->hash[i];
                while (curr) {
                        if (curr->flags & RP_TURN_RESTRICTION) 
                                route_graph_process_restriction_point(this, curr);
                        curr=curr->hash_next;
                }
        }
}

static void
route_graph_build_done(struct route_graph *rg, int cancel)
{
        dbg(1,"cancel=%d\n",cancel);
        if (rg->idle_ev)
                event_remove_idle(rg->idle_ev);
        if (rg->idle_cb)
                callback_destroy(rg->idle_cb);
        map_rect_destroy(rg->mr);
        mapset_close(rg->h);
        route_free_selection(rg->sel);
        rg->idle_ev=NULL;
        rg->idle_cb=NULL;
        rg->mr=NULL;
        rg->h=NULL;
        rg->sel=NULL;
        if (! cancel) {
                route_graph_process_restrictions(rg);
                callback_call_0(rg->done_cb);
        }
        rg->busy=0;
}

static void
route_graph_build_idle(struct route_graph *rg, struct vehicleprofile *profile)
{
        int count=1000;
        struct item *item;

        while (count > 0) {
                for (;;) {      
                        item=map_rect_get_item(rg->mr);
                        if (item)
                                break;
                        if (!route_graph_build_next_map(rg)) {
                                route_graph_build_done(rg, 0);
                                return;
                        }
                }
                if (item->type == type_traffic_distortion)
                        route_process_traffic_distortion(rg, item);
                else if (item->type == type_street_turn_restriction_no || item->type == type_street_turn_restriction_only)
                        route_process_turn_restriction(rg, item);
                else
                        route_process_street_graph(rg, item, profile);
                count--;
        }
}

/**
 * @brief Builds a new route graph from a mapset
 *
 * This function builds a new route graph from a map. Please note that this function does not
 * add any routing information to the route graph - this has to be done via the route_graph_flood()
 * function.
 *
 * The function does not create a graph covering the whole map, but only covering the rectangle
 * between c1 and c2.
 *
 * @param ms The mapset to build the route graph from
 * @param c1 Corner 1 of the rectangle to use from the map
 * @param c2 Corner 2 of the rectangle to use from the map
 * @param done_cb The callback which will be called when graph is complete
 * @return The new route graph.
 */
static struct route_graph *
route_graph_build(struct mapset *ms, struct coord *c, int count, struct callback *done_cb, int async, struct vehicleprofile *profile, int try_harder)
{
        struct route_graph *ret=g_new0(struct route_graph, 1);

        dbg(1,"enter\n");

        ret->sel=route_calc_selection(c, count, try_harder);
        ret->h=mapset_open(ms);
        ret->done_cb=done_cb;
        ret->busy=1;
        if (route_graph_build_next_map(ret)) {
                if (async) {
                        ret->idle_cb=callback_new_2(callback_cast(route_graph_build_idle), ret, profile);
                        ret->idle_ev=event_add_idle(50, ret->idle_cb);
                }
        } else
                route_graph_build_done(ret, 0);

        return ret;
}

static void
route_graph_update_done(struct route *this, struct callback *cb)
{
        route_graph_flood(this->graph, this->current_dst, this->vehicleprofile, cb);
}

/**
 * @brief Updates the route graph
 *
 * This updates the route graph after settings in the route have changed. It also
 * adds routing information afterwards by calling route_graph_flood().
 * 
 * @param this The route to update the graph for
 */
static void
route_graph_update(struct route *this, struct callback *cb, int async)
{
        struct attr route_status;
        struct coord *c=g_alloca(sizeof(struct coord)*(1+g_list_length(this->destinations)));
        int i=0;
        GList *tmp;

        route_status.type=attr_route_status;
        route_graph_destroy(this->graph);
        this->graph=NULL;
        callback_destroy(this->route_graph_done_cb);
        this->route_graph_done_cb=callback_new_2(callback_cast(route_graph_update_done), this, cb);
        route_status.u.num=route_status_building_graph;
        route_set_attr(this, &route_status);
        c[i++]=this->pos->c;
        tmp=this->destinations;
        while (tmp) {
                struct route_info *dst=tmp->data;
                c[i++]=dst->c;
                tmp=g_list_next(tmp);
        }
        this->graph=route_graph_build(this->ms, c, i, this->route_graph_done_cb, async, this->vehicleprofile, this->try_harder);
        if (! async) {
                while (this->graph->busy) 
                        route_graph_build_idle(this->graph, this->vehicleprofile);
        }
}

/**
 * @brief Gets street data for an item
 *
 * @param item The item to get the data for
 * @return Street data for the item
 */
struct street_data *
street_get_data (struct item *item)
{
        int count=0,*flags;
        struct street_data *ret = NULL, *ret1;
        struct attr flags_attr, maxspeed_attr;
        const int step = 128;
        int c;

        do {
                ret1=g_realloc(ret, sizeof(struct street_data)+(count+step)*sizeof(struct coord));
                if (!ret1) {
                        if (ret)
                                g_free(ret);
                        return NULL;
                }
                ret = ret1;
                c = item_coord_get(item, &ret->c[count], step);
                count += c;
        } while (c && c == step);

        ret1=g_realloc(ret, sizeof(struct street_data)+count*sizeof(struct coord));
        if (ret1)
                ret = ret1;
        ret->item=*item;
        ret->count=count;
        if (item_attr_get(item, attr_flags, &flags_attr)) 
                ret->flags=flags_attr.u.num;
        else {
                flags=item_get_default_flags(item->type);
                if (flags)
                        ret->flags=*flags;
                else
                        ret->flags=0;
        }

        ret->maxspeed = -1;
        if (ret->flags & AF_SPEED_LIMIT) {
                if (item_attr_get(item, attr_maxspeed, &maxspeed_attr)) {
                        ret->maxspeed = maxspeed_attr.u.num;
                }
        }

        return ret;
}

/**
 * @brief Copies street data
 * 
 * @param orig The street data to copy
 * @return The copied street data
 */ 
struct street_data *
street_data_dup(struct street_data *orig)
{
        struct street_data *ret;
        int size=sizeof(struct street_data)+orig->count*sizeof(struct coord);

        ret=g_malloc(size);
        memcpy(ret, orig, size);

        return ret;
}

/**
 * @brief Frees street data
 *
 * @param sd Street data to be freed
 */
void
street_data_free(struct street_data *sd)
{
        g_free(sd);
}

/**
 * @brief Finds the nearest street to a given coordinate
 *
 * @param ms The mapset to search in for the street
 * @param pc The coordinate to find a street nearby
 * @return The nearest street
 */
static struct route_info *
route_find_nearest_street(struct vehicleprofile *vehicleprofile, struct mapset *ms, struct pcoord *pc)
{
        struct route_info *ret=NULL;
        int max_dist=1000;
        struct map_selection *sel;
        int dist,mindist=0,pos;
        struct mapset_handle *h;
        struct map *m;
        struct map_rect *mr;
        struct item *item;
        struct coord lp;
        struct street_data *sd;
        struct coord c;
        struct coord_geo g;

        ret=g_new0(struct route_info, 1);
        mindist = INT_MAX;

        h=mapset_open(ms);
        while ((m=mapset_next(h,2))) {
                c.x = pc->x;
                c.y = pc->y;
                if (map_projection(m) != pc->pro) {
                        transform_to_geo(pc->pro, &c, &g);
                        transform_from_geo(map_projection(m), &g, &c);
                }
                sel = route_rect(18, &c, &c, 0, max_dist);
                if (!sel)
                        continue;
                mr=map_rect_new(m, sel);
                if (!mr) {
                        map_selection_destroy(sel);
                        continue;
                }
                while ((item=map_rect_get_item(mr))) {
                        if (item_get_default_flags(item->type)) {
                                sd=street_get_data(item);
                                if (!sd)
                                        continue;
                                dist=transform_distance_polyline_sq(sd->c, sd->count, &c, &lp, &pos);
                                if (dist < mindist && (
                                        (sd->flags & vehicleprofile->flags_forward_mask) == vehicleprofile->flags ||
                                        (sd->flags & vehicleprofile->flags_reverse_mask) == vehicleprofile->flags)) {
                                        mindist = dist;
                                        if (ret->street) {
                                                street_data_free(ret->street);
                                        }
                                        ret->c=c;
                                        ret->lp=lp;
                                        ret->pos=pos;
                                        ret->street=sd;
                                        dbg(1,"dist=%d id 0x%x 0x%x pos=%d\n", dist, item->id_hi, item->id_lo, pos);
                                } else {
                                        street_data_free(sd);
                                }
                        }
                }
                map_selection_destroy(sel);
                map_rect_destroy(mr);
        }
        mapset_close(h);

        if (!ret->street || mindist > max_dist*max_dist) {
                if (ret->street) {
                        street_data_free(ret->street);
                        dbg(1,"Much too far %d > %d\n", mindist, max_dist);
                }
                g_free(ret);
                ret = NULL;
        }

        return ret;
}

/**
 * @brief Destroys a route_info
 *
 * @param info The route info to be destroyed
 */
void
route_info_free(struct route_info *inf)
{
        if (!inf)
                return;
        if (inf->street)
                street_data_free(inf->street);
        g_free(inf);
}


#include "point.h"

/**
 * @brief Returns street data for a route info 
 *
 * @param rinf The route info to return the street data for
 * @return Street data for the route info
 */
struct street_data *
route_info_street(struct route_info *rinf)
{
        return rinf->street;
}

#if 0
struct route_crossings *
route_crossings_get(struct route *this, struct coord *c)
{
      struct route_point *pnt;
      struct route_segment *seg;
      int crossings=0;
      struct route_crossings *ret;

       pnt=route_graph_get_point(this, c);
       seg=pnt->start;
       while (seg) {
                printf("start: 0x%x 0x%x\n", seg->item.id_hi, seg->item.id_lo);
               crossings++;
               seg=seg->start_next;
       }
       seg=pnt->end;
       while (seg) {
                printf("end: 0x%x 0x%x\n", seg->item.id_hi, seg->item.id_lo);
               crossings++;
               seg=seg->end_next;
       }
       ret=g_malloc(sizeof(struct route_crossings)+crossings*sizeof(struct route_crossing));
       ret->count=crossings;
       return ret;
}
#endif


struct map_rect_priv {
        struct route_info_handle *ri;
        enum attr_type attr_next;
        int pos;
        struct map_priv *mpriv;
        struct item item;
        unsigned int last_coord;
        struct route_path *path;
        struct route_path_segment *seg,*seg_next;
        struct route_graph_point *point;
        struct route_graph_segment *rseg;
        char *str;
        int hash_bucket;
        struct coord *coord_sel;        /**< Set this to a coordinate if you want to filter for just a single route graph point */
        struct route_graph_point_iterator it;
};

static void
rm_coord_rewind(void *priv_data)
{
        struct map_rect_priv *mr = priv_data;
        mr->last_coord = 0;
}

static void
rm_attr_rewind(void *priv_data)
{
        struct map_rect_priv *mr = priv_data;
        mr->attr_next = attr_street_item;
}

static int
rm_attr_get(void *priv_data, enum attr_type attr_type, struct attr *attr)
{
        struct map_rect_priv *mr = priv_data;
        struct route_path_segment *seg=mr->seg;
        struct route *route=mr->mpriv->route;
        if (mr->item.type != type_street_route)
                return 0;
        attr->type=attr_type;
        switch (attr_type) {
                case attr_any:
                        while (mr->attr_next != attr_none) {
                                if (rm_attr_get(priv_data, mr->attr_next, attr))
                                        return 1;
                        }
                        return 0;
                case attr_maxspeed:
                        mr->attr_next = attr_street_item;
                        if (seg && seg->data->flags & AF_SPEED_LIMIT) {
                                attr->u.num=RSD_MAXSPEED(seg->data);

                        } else {
                                return 0;
                        }
                        return 1;
                case attr_street_item:
                        mr->attr_next=attr_direction;
                        if (seg && seg->data->item.map)
                                attr->u.item=&seg->data->item;
                        else
                                return 0;
                        return 1;
                case attr_direction:
                        mr->attr_next=attr_route;
                        if (seg) 
                                attr->u.num=seg->direction;
                        else
                                return 0;
                        return 1;
                case attr_route:
                        mr->attr_next=attr_length;
                        attr->u.route = mr->mpriv->route;
                        return 1;
                case attr_length:
                        mr->attr_next=attr_time;
                        if (seg)
                                attr->u.num=seg->data->len;
                        else
                                return 0;
                        return 1;
                case attr_time:
                        mr->attr_next=attr_speed;
                        if (seg)
                                attr->u.num=route_time_seg(route->vehicleprofile, seg->data, NULL);
                        else
                                return 0;
                        return 1;
                case attr_speed:
                        mr->attr_next=attr_none;
                        if (seg)
                                attr->u.num=route_seg_speed(route->vehicleprofile, seg->data, NULL);
                        else
                                return 0;
                        return 1;
                case attr_label:
                        mr->attr_next=attr_none;
                        return 0;
                default:
                        mr->attr_next=attr_none;
                        attr->type=attr_none;
                        return 0;
        }
        return 0;
}

static int
rm_coord_get(void *priv_data, struct coord *c, int count)
{
        struct map_rect_priv *mr = priv_data;
        struct route_path_segment *seg = mr->seg;
        int i,rc=0;
        struct route *r = mr->mpriv->route;
        enum projection pro = route_projection(r);

        if (pro == projection_none)
                return 0;
        if (mr->item.type == type_route_start || mr->item.type == type_route_start_reverse || mr->item.type == type_route_end) {
                if (! count || mr->last_coord)
                        return 0;
                mr->last_coord=1;
                if (mr->item.type == type_route_start || mr->item.type == type_route_start_reverse)
                        c[0]=r->pos->c;
                else {
                        c[0]=route_get_dst(r)->c;
                }       
                return 1;
        }
        if (! seg)
                return 0;
        for (i=0; i < count; i++) {
                if (mr->last_coord >= seg->ncoords)
                        break;
                if (i >= seg->ncoords)
                        break;
                if (pro != projection_mg)
                        transform_from_to(&seg->c[mr->last_coord++], pro,
                                &c[i],projection_mg);
                else
                        c[i] = seg->c[mr->last_coord++];
                rc++;
        }
        dbg(1,"return %d\n",rc);
        return rc;
}

static struct item_methods methods_route_item = {
        rm_coord_rewind,
        rm_coord_get,
        rm_attr_rewind,
        rm_attr_get,
};

static void
rp_attr_rewind(void *priv_data)
{
        struct map_rect_priv *mr = priv_data;
        mr->attr_next = attr_label;
}

static int
rp_attr_get(void *priv_data, enum attr_type attr_type, struct attr *attr)
{
        struct map_rect_priv *mr = priv_data;
        struct route_graph_point *p = mr->point;
        struct route_graph_segment *seg = mr->rseg;
        struct route *route=mr->mpriv->route;

        attr->type=attr_type;
        switch (attr_type) {
        case attr_any: // works only with rg_points for now
                while (mr->attr_next != attr_none) {
                        dbg(0,"querying %s\n", attr_to_name(mr->attr_next));
                        if (rp_attr_get(priv_data, mr->attr_next, attr))
                                return 1;
                }
                return 0;
        case attr_maxspeed:
                mr->attr_next = attr_label;
                if (mr->item.type != type_rg_segment) 
                        return 0;
                if (seg && (seg->data.flags & AF_SPEED_LIMIT)) {
                        attr->type = attr_maxspeed;
                        attr->u.num=RSD_MAXSPEED(&seg->data);
                        return 1;
                } else {
                        return 0;
                }
        case attr_label:
                mr->attr_next=attr_street_item;
                if (mr->item.type != type_rg_point) 
                        return 0;
                attr->type = attr_label;
                if (mr->str)
                        g_free(mr->str);
                if (p->value != INT_MAX)
                        mr->str=g_strdup_printf("%d", p->value);
                else
                        mr->str=g_strdup("-");
                attr->u.str = mr->str;
                return 1;
        case attr_street_item:
                mr->attr_next=attr_flags;
                if (mr->item.type != type_rg_segment) 
                        return 0;
                if (seg && seg->data.item.map)
                        attr->u.item=&seg->data.item;
                else
                        return 0;
                return 1;
        case attr_flags:
                mr->attr_next = attr_direction;
                if (mr->item.type != type_rg_segment)
                        return 0;
                if (seg) {
                        attr->u.num = seg->data.flags;
                } else {
                        return 0;
                }
                return 1;
        case attr_direction:
                mr->attr_next = attr_debug;
                // This only works if the map has been opened at a single point, and in that case indicates if the
                // segment returned last is connected to this point via its start (1) or its end (-1)
                if (!mr->coord_sel || (mr->item.type != type_rg_segment))
                        return 0;
                if (seg->start == mr->point) {
                        attr->u.num=1;
                } else if (seg->end == mr->point) {
                        attr->u.num=-1;
                } else {
                        return 0;
                }
                return 1;
        case attr_debug:
                mr->attr_next=attr_none;
                if (mr->str)
                        g_free(mr->str);
                switch (mr->item.type) {
                case type_rg_point:
                {
                        struct route_graph_segment *tmp;
                        int start=0;
                        int end=0;
                        tmp=p->start;
                        while (tmp) {
                                start++;
                                tmp=tmp->start_next;
                        }
                        tmp=p->end;
                        while (tmp) {
                                end++;
                                tmp=tmp->end_next;
                        }
                        mr->str=g_strdup_printf("%d %d %p (0x%x,0x%x)", start, end, p, p->c.x, p->c.y);
                        attr->u.str = mr->str;
                }
                        return 1;
                case type_rg_segment:
                        if (! seg)
                                return 0;
                        mr->str=g_strdup_printf("len %d time %d start %p end %p",seg->data.len, route_time_seg(route->vehicleprofile, &seg->data, NULL), seg->start, seg->end);
                        attr->u.str = mr->str;
                        return 1;
                default:
                        return 0;
                }
        default:
                mr->attr_next=attr_none;
                attr->type=attr_none;
                return 0;
        }
}

/**
 * @brief Returns the coordinates of a route graph item
 *
 * @param priv_data The route graph item's private data
 * @param c Pointer where to store the coordinates
 * @param count How many coordinates to get at a max?
 * @return The number of coordinates retrieved
 */
static int
rp_coord_get(void *priv_data, struct coord *c, int count)
{
        struct map_rect_priv *mr = priv_data;
        struct route_graph_point *p = mr->point;
        struct route_graph_segment *seg = mr->rseg;
        int rc = 0,i,dir;
        struct route *r = mr->mpriv->route;
        enum projection pro = route_projection(r);

        if (pro == projection_none)
                return 0;
        for (i=0; i < count; i++) {
                if (mr->item.type == type_rg_point) {
                        if (mr->last_coord >= 1)
                                break;
                        if (pro != projection_mg)
                                transform_from_to(&p->c, pro,
                                        &c[i],projection_mg);
                        else
                                c[i] = p->c;
                } else {
                        if (mr->last_coord >= 2)
                                break;
                        dir=0;
                        if (seg->end->seg == seg)
                                dir=1;
                        if (mr->last_coord)
                                dir=1-dir;
                        if (dir) {
                                if (pro != projection_mg)
                                        transform_from_to(&seg->end->c, pro,
                                                &c[i],projection_mg);
                                else
                                        c[i] = seg->end->c;
                        } else {
                                if (pro != projection_mg)
                                        transform_from_to(&seg->start->c, pro,
                                                &c[i],projection_mg);
                                else
                                        c[i] = seg->start->c;
                        }
                }
                mr->last_coord++;
                rc++;
        }
        return rc;
}

static struct item_methods methods_point_item = {
        rm_coord_rewind,
        rp_coord_get,
        rp_attr_rewind,
        rp_attr_get,
};

static void
rp_destroy(struct map_priv *priv)
{
        g_free(priv);
}

static void
rm_destroy(struct map_priv *priv)
{
        g_free(priv);
}

static struct map_rect_priv * 
rm_rect_new(struct map_priv *priv, struct map_selection *sel)
{
        struct map_rect_priv * mr;
        dbg(1,"enter\n");
#if 0
        if (! route_get_pos(priv->route))
                return NULL;
        if (! route_get_dst(priv->route))
                return NULL;
#endif
#if 0
        if (! priv->route->path2)
                return NULL;
#endif
        mr=g_new0(struct map_rect_priv, 1);
        mr->mpriv = priv;
        mr->item.priv_data = mr;
        mr->item.type = type_none;
        mr->item.meth = &methods_route_item;
        if (priv->route->path2) {
                mr->path=priv->route->path2;
                mr->seg_next=mr->path->path;
                mr->path->in_use++;
        } else
                mr->seg_next=NULL;
        return mr;
}

/**
 * @brief Opens a new map rectangle on the route graph's map
 *
 * This function opens a new map rectangle on the route graph's map.
 * The "sel" parameter enables you to only search for a single route graph
 * point on this map (or exactly: open a map rectangle that only contains
 * this one point). To do this, pass here a single map selection, whose 
 * c_rect has both coordinates set to the same point. Otherwise this parameter
 * has no effect.
 *
 * @param priv The route graph map's private data
 * @param sel Here it's possible to specify a point for which to search. Please read the function's description.
 * @return A new map rect's private data
 */
static struct map_rect_priv * 
rp_rect_new(struct map_priv *priv, struct map_selection *sel)
{
        struct map_rect_priv * mr;

        dbg(1,"enter\n");
        if (! priv->route->graph)
                return NULL;
        mr=g_new0(struct map_rect_priv, 1);
        mr->mpriv = priv;
        mr->item.priv_data = mr;
        mr->item.type = type_rg_point;
        mr->item.meth = &methods_point_item;
        if (sel) {
                if ((sel->u.c_rect.lu.x == sel->u.c_rect.rl.x) && (sel->u.c_rect.lu.y == sel->u.c_rect.rl.y)) {
                        mr->coord_sel = g_malloc(sizeof(struct coord));
                        *(mr->coord_sel) = sel->u.c_rect.lu;
                }
        }
        return mr;
}

static void
rm_rect_destroy(struct map_rect_priv *mr)
{
        if (mr->str)
                g_free(mr->str);
        if (mr->coord_sel) {
                g_free(mr->coord_sel);
        }
        if (mr->path) {
                mr->path->in_use--;
                if (mr->path->update_required && (mr->path->in_use==1)) 
                        route_path_update_done(mr->mpriv->route, mr->path->update_required-1);
                else if (!mr->path->in_use)
                        g_free(mr->path);
        }

        g_free(mr);
}

static struct item *
rp_get_item(struct map_rect_priv *mr)
{
        struct route *r = mr->mpriv->route;
        struct route_graph_point *p = mr->point;
        struct route_graph_segment *seg = mr->rseg;

        if (mr->item.type == type_rg_point) {
                if (mr->coord_sel) {
                        // We are supposed to return only the point at one specified coordinate...
                        if (!p) {
                                p = route_graph_get_point_last(r->graph, mr->coord_sel);
                                if (!p) {
                                        mr->point = NULL; // This indicates that no point has been found
                                } else {
                                        mr->it = rp_iterator_new(p);
                                }
                        } else {
                                p = NULL;
                        }
                } else {
                        if (!p) {
                                mr->hash_bucket=0;
                                p = r->graph->hash[0];
                        } else 
                                p=p->hash_next;
                        while (!p) {
                                mr->hash_bucket++;
                                if (mr->hash_bucket >= HASH_SIZE)
                                        break;
                                p = r->graph->hash[mr->hash_bucket];
                        }
                }
                if (p) {
                        mr->point = p;
                        mr->item.id_lo++;
                        rm_coord_rewind(mr);
                        rp_attr_rewind(mr);
                        return &mr->item;
                } else
                        mr->item.type = type_rg_segment;
        }
        
        if (mr->coord_sel) {
                if (!mr->point) { // This means that no point has been found
                        return NULL;
                }
                seg = rp_iterator_next(&(mr->it));
        } else {
                if (!seg)
                        seg=r->graph->route_segments;
                else
                        seg=seg->next;
        }
        
        if (seg) {
                mr->rseg = seg;
                mr->item.id_lo++;
                rm_coord_rewind(mr);
                rp_attr_rewind(mr);
                return &mr->item;
        }
        return NULL;
        
}

static struct item *
rp_get_item_byid(struct map_rect_priv *mr, int id_hi, int id_lo)
{
        struct item *ret=NULL;
        while (id_lo-- > 0) 
                ret=rp_get_item(mr);
        return ret;
}


static struct item *
rm_get_item(struct map_rect_priv *mr)
{
        struct route *route=mr->mpriv->route;
        dbg(1,"enter\n", mr->pos);

        switch (mr->item.type) {
        case type_none:
                if (route->pos && route->pos->street_direction && route->pos->street_direction != route->pos->dir)
                        mr->item.type=type_route_start_reverse;
                else
                        mr->item.type=type_route_start;
                if (route->pos) 
                        break;
        default:
                mr->item.type=type_street_route;
                mr->seg=mr->seg_next;
                if (!mr->seg && mr->path && mr->path->next) {
                        struct route_path *p=NULL;
                        mr->path->in_use--;
                        if (!mr->path->in_use)
                                p=mr->path;
                        mr->path=mr->path->next;
                        mr->path->in_use++;
                        mr->seg=mr->path->path;
                        if (p)
                                g_free(p);
                }
                if (mr->seg) {
                        mr->seg_next=mr->seg->next;
                        break;
                }
                mr->item.type=type_route_end;
                if (mr->mpriv->route->destinations)
                        break;
        case type_route_end:
                return NULL;
        }
        mr->last_coord = 0;
        mr->item.id_lo++;
        rm_attr_rewind(mr);
        return &mr->item;
}

static struct item *
rm_get_item_byid(struct map_rect_priv *mr, int id_hi, int id_lo)
{
        struct item *ret=NULL;
        while (id_lo-- > 0) 
                ret=rm_get_item(mr);
        return ret;
}

static struct map_methods route_meth = {
        projection_mg,
        "utf-8",
        rm_destroy,
        rm_rect_new,
        rm_rect_destroy,
        rm_get_item,
        rm_get_item_byid,
        NULL,
        NULL,
        NULL,
};

static struct map_methods route_graph_meth = {
        projection_mg,
        "utf-8",
        rp_destroy,
        rp_rect_new,
        rm_rect_destroy,
        rp_get_item,
        rp_get_item_byid,
        NULL,
        NULL,
        NULL,
};

static struct map_priv *
route_map_new_helper(struct map_methods *meth, struct attr **attrs, int graph)
{
        struct map_priv *ret;
        struct attr *route_attr;

        route_attr=attr_search(attrs, NULL, attr_route);
        if (! route_attr)
                return NULL;
        ret=g_new0(struct map_priv, 1);
        if (graph)
                *meth=route_graph_meth;
        else
                *meth=route_meth;
        ret->route=route_attr->u.route;

        return ret;
}

static struct map_priv *
route_map_new(struct map_methods *meth, struct attr **attrs, struct callback_list *cbl)
{
        return route_map_new_helper(meth, attrs, 0);
}

static struct map_priv *
route_graph_map_new(struct map_methods *meth, struct attr **attrs, struct callback_list *cbl)
{
        return route_map_new_helper(meth, attrs, 1);
}

static struct map *
route_get_map_helper(struct route *this_, struct map **map, char *type, char *description)
{
        struct attr *attrs[5];
        struct attr a_type,navigation,data,a_description;
        a_type.type=attr_type;
        a_type.u.str=type;
        navigation.type=attr_route;
        navigation.u.route=this_;
        data.type=attr_data;
        data.u.str="";
        a_description.type=attr_description;
        a_description.u.str=description;

        attrs[0]=&a_type;
        attrs[1]=&navigation;
        attrs[2]=&data;
        attrs[3]=&a_description;
        attrs[4]=NULL;

        if (! *map) { 
                *map=map_new(NULL, attrs);
                map_ref(*map);
        }
 
        return *map;
}

/**
 * @brief Returns a new map containing the route path
 *
 * This function returns a new map containing the route path.
 *
 * @important Do not map_destroy() this!
 *
 * @param this_ The route to get the map of
 * @return A new map containing the route path
 */
struct map *
route_get_map(struct route *this_)
{
        return route_get_map_helper(this_, &this_->map, "route","Route");
}


/**
 * @brief Returns a new map containing the route graph
 *
 * This function returns a new map containing the route graph.
 *
 * @important Do not map_destroy()  this!
 *
 * @param this_ The route to get the map of
 * @return A new map containing the route graph
 */
struct map *
route_get_graph_map(struct route *this_)
{
        return route_get_map_helper(this_, &this_->graph_map, "route_graph","Route Graph");
}

void
route_set_projection(struct route *this_, enum projection pro)
{
}

int
route_set_attr(struct route *this_, struct attr *attr)
{
        int attr_updated=0;
        switch (attr->type) {
        case attr_route_status:
                attr_updated = (this_->route_status != attr->u.num);
                this_->route_status = attr->u.num;
                // update global route_status notifier
                this_->route_status_was_updated = 1;
                break;
        case attr_destination:
                route_set_destination(this_, attr->u.pcoord, 1);
                return 1;
        case attr_vehicle:
                attr_updated = (this_->v != attr->u.vehicle);
                this_->v=attr->u.vehicle;
                if (attr_updated) {
                        struct attr g;
                        struct pcoord pc;
                        struct coord c;
                        if (vehicle_get_attr(this_->v, attr_position_coord_geo, &g, NULL)) {
                                pc.pro=projection_mg;
                                transform_from_geo(projection_mg, g.u.coord_geo, &c);
                                pc.x=c.x;
                                pc.y=c.y;
                                route_set_position(this_, &pc);
                        }
                }
                break;
        default:
                dbg(0,"unsupported attribute: %s\n",attr_to_name(attr->type));
                return 0;
        }
        if (attr_updated)
                callback_list_call_attr_2(this_->cbl2, attr->type, this_, attr);
        return 1;
}

int
route_add_attr(struct route *this_, struct attr *attr)
{
        switch (attr->type) {
        case attr_callback:
                callback_list_add(this_->cbl2, attr->u.callback);
                return 1;
        default:
                return 0;
        }
}

int
route_remove_attr(struct route *this_, struct attr *attr)
{
        //dbg(0,"enter\n");
        switch (attr->type) {
        case attr_callback:
                callback_list_remove(this_->cbl2, attr->u.callback);
                return 1;
        case attr_vehicle:
                this_->v=NULL;
                return 1;
        default:
                return 0;
        }
}

int
route_get_attr(struct route *this_, enum attr_type type, struct attr *attr, struct attr_iter *iter)
{
        int ret=1;
        switch (type) {
        case attr_map:
                attr->u.map=route_get_map(this_);
                ret=(attr->u.map != NULL);
                break;
        case attr_destination:
                if (this_->destinations) {
                        struct route_info *dst;
                        if (iter) {
                                if (iter->u.list) {
                                        iter->u.list=g_list_next(iter->u.list);
                                } else {
                                        iter->u.list=this_->destinations;
                                }
                                if (!iter->u.list) {
                                        return 0;
                                }
                                dst = (struct route_info*)iter->u.list->data;                           
                        } else { //No iter handling
                                dst=route_get_dst(this_);
                        }
                        attr->u.pcoord=&this_->pc;
                        this_->pc.pro=projection_mg; /* fixme */
                        this_->pc.x=dst->c.x;
                        this_->pc.y=dst->c.y;
                } else
                        ret=0;
                break;
        case attr_vehicle:
                attr->u.vehicle=this_->v;
                ret=(this_->v != NULL);
                //dbg(0,"get vehicle %p\n",this_->v);
                break;
        case attr_vehicleprofile:
                attr->u.vehicleprofile=this_->vehicleprofile;
                ret=(this_->vehicleprofile != NULL);
                break;
        case attr_route_status:
                attr->u.num=this_->route_status;
                break;
        case attr_destination_time:
                if (this_->path2 && (this_->route_status == route_status_path_done_new || this_->route_status == route_status_path_done_incremental)) {

                        attr->u.num=this_->path2->path_time;
                        dbg(1,"path_time %d\n",attr->u.num);
                }
                else
                        ret=0;
                break;
        case attr_destination_length:
                if (this_->path2 && (this_->route_status == route_status_path_done_new || this_->route_status == route_status_path_done_incremental))
                        attr->u.num=this_->path2->path_len;
                else
                        ret=0;
                break;
        default:
                return 0;
        }
        attr->type=type;
        return ret;
}

struct attr_iter *
route_attr_iter_new(void)
{
        return g_new0(struct attr_iter, 1);
}

void
route_attr_iter_destroy(struct attr_iter *iter)
{
        g_free(iter);
}

void
route_init(void)
{
        plugin_register_map_type("route", route_map_new);
        plugin_register_map_type("route_graph", route_graph_map_new);
}

void
route_destroy(struct route *this_)
{
        route_path_destroy(this_->path2,1);
        route_graph_destroy(this_->graph);
        route_clear_destinations(this_);
        route_info_free(this_->pos);
        map_destroy(this_->map);
        map_destroy(this_->graph_map);
        g_free(this_);
}