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Minor changes to avoid undefined behaviour warnings.

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Avoid creating a reference from a nullptr.
Avoid trying a malloc and memcpy into a 0 length buffer.
Virtual trains should never be drawn.
This commit is contained in:
Jonathan G Rennison 2016-03-21 13:09:57 +00:00
parent a70b1e5e9e
commit 330a7327d6
5 changed files with 13 additions and 10 deletions
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7
src/newgrf.cpp
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@ -3664,8 +3664,11 @@ static void DuplicateTileTable(AirportSpec *as)
MemCpyT(table_list[i], as->table[i], num_tiles);
}
as->table = table_list;
HangarTileTable *depot_table = MallocT<HangarTileTable>(as->nof_depots);
MemCpyT(depot_table, as->depot_table, as->nof_depots);
HangarTileTable *depot_table = NULL;
if (as->nof_depots > 0) {
depot_table = MallocT<HangarTileTable>(as->nof_depots);
MemCpyT(depot_table, as->depot_table, as->nof_depots);
}
as->depot_table = depot_table;
}

2
src/pathfinder/follow_track.hpp
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@ -236,7 +236,7 @@ protected:
/** stores track status (available trackdirs) for the new tile into m_new_td_bits */
inline bool QueryNewTileTrackStatus()
{
CPerfStart perf(*m_pPerf);
CPerfStart perf(m_pPerf);
if (IsRailTT() && IsPlainRailTile(m_new_tile)) {
m_new_td_bits = (TrackdirBits)(GetTrackBits(m_new_tile) * 0x101);
} else {

4
src/pathfinder/pf_performance_timer.hpp
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@ -51,7 +51,7 @@ struct CPerfStartReal
{
CPerformanceTimer *m_pperf;
inline CPerfStartReal(CPerformanceTimer& perf) : m_pperf(&perf)
inline CPerfStartReal(CPerformanceTimer* perf) : m_pperf(perf)
{
if (m_pperf != NULL) m_pperf->Start();
}
@ -72,7 +72,7 @@ struct CPerfStartReal
struct CPerfStartFake
{
inline CPerfStartFake(CPerformanceTimer& perf) {}
inline CPerfStartFake(CPerformanceTimer* perf) {}
inline ~CPerfStartFake() {}
inline void Stop() {}
};

6
src/pathfinder/yapf/yapf_costrail.hpp
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@ -94,7 +94,7 @@ protected:
public:
inline int SlopeCost(TileIndex tile, Trackdir td)
{
CPerfStart perf_cost(Yapf().m_perf_slope_cost);
CPerfStart perf_cost(&Yapf().m_perf_slope_cost);
if (!stSlopeCost(tile, td)) return 0;
return Yapf().PfGetSettings().rail_slope_penalty;
}
@ -280,7 +280,7 @@ public:
{
int cost = 0;
/* if there is one-way signal in the opposite direction, then it is not our way */
CPerfStart perf_cost(Yapf().m_perf_other_cost);
CPerfStart perf_cost(&Yapf().m_perf_other_cost);
if (IsTileType(tile, MP_RAILWAY)) {
bool has_signal_against = HasSignalOnTrackdir(tile, ReverseTrackdir(trackdir));
bool has_signal_along = HasSignalOnTrackdir(tile, trackdir);
@ -402,7 +402,7 @@ public:
assert(tf->m_new_tile == n.m_key.m_tile);
assert((TrackdirToTrackdirBits(n.m_key.m_td) & tf->m_new_td_bits) != TRACKDIR_BIT_NONE);
CPerfStart perf_cost(Yapf().m_perf_cost);
CPerfStart perf_cost(&Yapf().m_perf_cost);
/* Does the node have some parent node? */
bool has_parent = (n.m_parent != NULL);

4
src/vehicle.cpp
View File

@ -296,10 +296,10 @@ uint Vehicle::Crash(bool flooded)
*/
bool Vehicle::IsDrawn() const
{
return !(this->vehstatus & VS_HIDDEN) ||
return !(HasBit(this->subtype, GVSF_VIRTUAL)) && (!(this->vehstatus & VS_HIDDEN) ||
(IsTransparencySet(TO_TUNNELS) &&
((this->type == VEH_TRAIN && Train::From(this)->track == TRACK_BIT_WORMHOLE) ||
(this->type == VEH_ROAD && RoadVehicle::From(this)->state == RVSB_WORMHOLE)));
(this->type == VEH_ROAD && RoadVehicle::From(this)->state == RVSB_WORMHOLE))));
}
/**