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Codechange: Simplify testing for railtype map conversion.

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Build the list of railtype conversions at the same time as testing if conversion is needed.

This avoids having two similar loops which need to compare the same things.
This commit is contained in:
Peter Nelson 2024-10-22 17:42:36 +01:00 committed by Peter Nelson
parent 36c735ebfa
commit 157d028915
1 changed files with 45 additions and 55 deletions
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100
src/saveload/labelmaps_sl.cpp
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@ -22,67 +22,59 @@ static std::vector<RailTypeLabel> _railtype_list;
/**
* Test if any saved rail type labels are different to the currently loaded
* rail types, which therefore requires conversion.
* @return true if (and only if) conversion due to rail type changes is needed.
* rail types. Rail types stored in the map will be converted if necessary.
*/
static bool NeedRailTypeConversion()
static void ConvertRailTypes()
{
for (uint i = 0; i < _railtype_list.size(); i++) {
if ((RailType)i < RAILTYPE_END) {
const RailTypeInfo *rti = GetRailTypeInfo((RailType)i);
if (rti->label != _railtype_list[i]) return true;
} else {
if (_railtype_list[i] != 0) return true;
std::vector<RailType> railtype_conversion_map;
bool needs_conversion = false;
for (auto it = std::begin(_railtype_list); it != std::end(_railtype_list); ++it) {
RailType rt = GetRailTypeByLabel(*it);
if (rt == INVALID_RAILTYPE) {
rt = RAILTYPE_RAIL;
}
railtype_conversion_map.push_back(rt);
/* Conversion is needed if the rail type is in a different position than the list. */
if (*it != 0 && rt != std::distance(std::begin(_railtype_list), it)) needs_conversion = true;
}
if (!needs_conversion) return;
for (TileIndex t : Map::Iterate()) {
switch (GetTileType(t)) {
case MP_RAILWAY:
SetRailType(t, railtype_conversion_map[GetRailType(t)]);
break;
case MP_ROAD:
if (IsLevelCrossing(t)) {
SetRailType(t, railtype_conversion_map[GetRailType(t)]);
}
break;
case MP_STATION:
if (HasStationRail(t)) {
SetRailType(t, railtype_conversion_map[GetRailType(t)]);
}
break;
case MP_TUNNELBRIDGE:
if (GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL) {
SetRailType(t, railtype_conversion_map[GetRailType(t)]);
}
break;
default:
break;
}
}
/* No rail type conversion is necessary */
return false;
}
void AfterLoadLabelMaps()
{
if (NeedRailTypeConversion()) {
std::vector<RailType> railtype_conversion_map;
for (uint i = 0; i < _railtype_list.size(); i++) {
RailType r = GetRailTypeByLabel(_railtype_list[i]);
if (r == INVALID_RAILTYPE) r = RAILTYPE_BEGIN;
railtype_conversion_map.push_back(r);
}
for (TileIndex t = 0; t < Map::Size(); t++) {
switch (GetTileType(t)) {
case MP_RAILWAY:
SetRailType(t, railtype_conversion_map[GetRailType(t)]);
break;
case MP_ROAD:
if (IsLevelCrossing(t)) {
SetRailType(t, railtype_conversion_map[GetRailType(t)]);
}
break;
case MP_STATION:
if (HasStationRail(t)) {
SetRailType(t, railtype_conversion_map[GetRailType(t)]);
}
break;
case MP_TUNNELBRIDGE:
if (GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL) {
SetRailType(t, railtype_conversion_map[GetRailType(t)]);
}
break;
default:
break;
}
}
}
ResetLabelMaps();
ConvertRailTypes();
}
void ResetLabelMaps()
@ -120,8 +112,6 @@ struct RAILChunkHandler : ChunkHandler {
{
const std::vector<SaveLoad> slt = SlCompatTableHeader(_label_object_desc, _label_object_sl_compat);
ResetLabelMaps();
LabelObject lo;
while (SlIterateArray() != -1) {