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/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file labelmaps_sl.cpp Code handling saving and loading of rail type label mappings */
#include "../stdafx.h"
#include "saveload.h"
#include "compat/labelmaps_sl_compat.h"
#include "saveload_internal.h"
#include "../station_map.h"
#include "../tunnelbridge_map.h"
#include "../safeguards.h"
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.
*/
static bool NeedRailTypeConversion()
{
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;
}
}
/* 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 < MapSize(); 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();
}
void ResetLabelMaps()
{
_railtype_list.clear();
}
/** Container for a label for SaveLoad system */
struct LabelObject {
uint32 label;
};
static const SaveLoad _label_object_desc[] = {
SLE_VAR(LabelObject, label, SLE_UINT32),
};
struct RAILChunkHandler : ChunkHandler {
RAILChunkHandler() : ChunkHandler('RAIL', CH_TABLE) {}
void Save() const override
{
SlTableHeader(_label_object_desc);
LabelObject lo;
for (RailType r = RAILTYPE_BEGIN; r != RAILTYPE_END; r++) {
lo.label = GetRailTypeInfo(r)->label;
SlSetArrayIndex(r);
SlObject(&lo, _label_object_desc);
}
}
void Load() const override
{
const std::vector<SaveLoad> slt = SlCompatTableHeader(_label_object_desc, _label_object_sl_compat);
ResetLabelMaps();
LabelObject lo;
while (SlIterateArray() != -1) {
SlObject(&lo, slt);
_railtype_list.push_back((RailTypeLabel)lo.label);
}
}
};
static const RAILChunkHandler RAIL;
static const ChunkHandlerRef labelmaps_chunk_handlers[] = {
RAIL,
};
extern const ChunkHandlerTable _labelmaps_chunk_handlers(labelmaps_chunk_handlers);
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