# ai_waypoint.cpp

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    00001 /* $Id: ai_waypoint.cpp 15519 2009-02-19 07:40:08Z yexo $ */
    00002
    00005 #include "ai_waypoint.hpp"
    00006 #include "ai_rail.hpp"
    00007 #include "../../command_func.h"
    00008 #include "../../string_func.h"
    00009 #include "../../strings_func.h"
    00010 #include "../../company_func.h"
    00011 #include "../../waypoint.h"
    00012 #include "../../core/alloc_func.hpp"
    00013 #include "table/strings.h"
    00014
    00015 /* static */ bool AIWaypoint::IsValidWaypoint(WaypointID waypoint_id)
    00016 {
    00017   return ::IsValidWaypointID(waypoint_id) && ::GetWaypoint(waypoint_id)->owner == _current_company;
    00018 }
    00019
    00020 /* static */ WaypointID AIWaypoint::GetWaypointID(TileIndex tile)
    00021 {
    00022   if (!AIRail::IsRailWaypointTile(tile)) return WAYPOINT_INVALID;
    00023
    00024   return ::GetWaypointIndex(tile);
    00025 }
    00026
    00027 /* static */ char *AIWaypoint::GetName(WaypointID waypoint_id)
    00028 {
    00029   if (!IsValidWaypoint(waypoint_id)) return NULL;
    00030
    00031   static const int len = 64;
    00032   char *waypoint_name = MallocT<char>(len);
    00033
    00034   ::SetDParam(0, waypoint_id);
    00035   ::GetString(waypoint_name, STR_WAYPOINT_RAW, &waypoint_name[len - 1]);
    00036   return waypoint_name;
    00037 }
    00038
    00039 /* static */ bool AIWaypoint::SetName(WaypointID waypoint_id, const char *name)
    00040 {
    00041   EnforcePrecondition(false, IsValidWaypoint(waypoint_id));
    00042   EnforcePrecondition(false, !::StrEmpty(name));
    00043   EnforcePreconditionCustomError(false, ::strlen(name) < MAX_LENGTH_WAYPOINT_NAME_BYTES, AIError::ERR_PRECONDITION_STRING_TOO_LONG);
    00044
    00045   return AIObject::DoCommand(0, waypoint_id, 0, CMD_RENAME_WAYPOINT, name);
    00046 }
    00047
    00048 /* static */ TileIndex AIWaypoint::GetLocation(WaypointID waypoint_id)
    00049 {
    00050   if (!IsValidWaypoint(waypoint_id)) return INVALID_TILE;
    00051
    00052   return ::GetWaypoint(waypoint_id)->xy;
    00053 }