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Fix ride_shop_connected dereferencing null.

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This commit is contained in:
Matt 2019-02-25 20:07:36 +01:00
parent f769779f0d
commit f0366b84e4
1 changed files with 14 additions and 6 deletions
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20
src/openrct2/ride/Ride.cpp
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@ -3463,7 +3463,6 @@ static void ride_entrance_exit_connected(Ride* ride)
static void ride_shop_connected(Ride* ride)
{
int32_t x, y, count;
TileElement* tileElement;
LocationXY8 coordinates = ride->stations[0].Start;
if (coordinates.xy == RCT_XY8_UNDEFINED)
@ -3472,16 +3471,25 @@ static void ride_shop_connected(Ride* ride)
x = coordinates.x;
y = coordinates.y;
tileElement = map_get_first_element_at(x, y);
TrackElement* trackElement = nullptr;
TileElement* tileElement = map_get_first_element_at(x, y);
do
{
if (tileElement->GetType() == TILE_ELEMENT_TYPE_TRACK && tileElement->AsTrack()->GetRideIndex() == ride->id)
if (tileElement == nullptr)
break;
if (tileElement->GetType() == TILE_ELEMENT_TYPE_TRACK && tileElement->AsTrack()->GetRideIndex() == ride->id)
{
trackElement = tileElement->AsTrack();
break;
}
} while (!(tileElement++)->IsLastForTile());
if (trackElement == nullptr)
return;
uint16_t entrance_directions = 0;
uint8_t track_type = tileElement->AsTrack()->GetTrackType();
ride = get_ride(tileElement->AsTrack()->GetRideIndex());
uint8_t track_type = trackElement->GetTrackType();
ride = get_ride(trackElement->GetRideIndex());
if (ride == nullptr)
{
return;
@ -3495,7 +3503,7 @@ static void ride_shop_connected(Ride* ride)
entrance_directions = TrackSequenceProperties[track_type][0];
}
uint8_t tile_direction = tileElement->GetDirection();
uint8_t tile_direction = trackElement->GetDirection();
entrance_directions <<= tile_direction;
entrance_directions = ((entrance_directions >> 12) | entrance_directions) & 0xF;