Freeciv

const struct player *pplayer,

const struct tile *t1, const struct tile *t2);

The cost to move punit from where it is to tile x,y.

It is assumed the move is a valid one, e.g. the tiles are adjacent.

static inline int map_move_cost_unit(const struct civ_map *nmap,

struct unit *punit,

const struct tile *ptile)

unit_tile(punit), ptile);

}

Move cost between two tiles

static inline int map_move_cost(const struct civ_map *nmap,

const struct player *pplayer,

const struct unit_type *punittype,

* elements defined above.

*/

static inline int map_pos_to_index(struct civ_map *nmap, int map_x, int map_y)

{

/* Note: writing this as a macro is hard; it needs temp variables. */

CHECK_MAP_POS(map_x, map_y);

MAP_TO_NATIVE_POS(&nat_x, &nat_y, map_x, map_y);

return native_pos_to_index(nat_x, nat_y);

}

static inline int index_to_map_pos_x(int mindex)

{

/* Note: writing this as a macro is hard; it needs temp variables. */

int map_x, map_y;

index_to_map_pos(&map_x, &map_y, mindex);

return map_x;

}

static inline int index_to_map_pos_y(int mindex)

{

/* Note: writing this as a macro is hard; it needs temp variables. */

int map_x, map_y;

index_to_map_pos(&map_x, &map_y, mindex);

return map_y;

}

A "border position" is any map position that _may have_ positions within

real map distance dist that are non-normal. To see its correctness,

consider the case where dist is 1 or 0.