cargomonitor_sl.cpp

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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/>.
 */
 
#include "../stdafx.h"
 
#include "saveload.h"
#include "compat/cargomonitor_sl_compat.h"
 
#include "../cargomonitor.h"
 
#include "../safeguards.h"
 
struct TempStorage {
  CargoMonitorID number;
  uint32_t amount;
};
 
static const SaveLoad _cargomonitor_pair_desc[] = {
  SLE_VAR(TempStorage, number, SLE_UINT32),
  SLE_VAR(TempStorage, amount, SLE_UINT32),
};
 
static CargoMonitorID FixupCargoMonitor(CargoMonitorID number)
{
  /* Between SLV_EXTEND_CARGOTYPES and SLV_FIX_CARGO_MONITOR, the
   * CargoMonitorID structure had insufficient packing for more
   * than 32 cargo types. Here we have to shuffle bits to account
   * for the change.
   * Company moved from bits 24-31 to 25-28.
   * Cargo type increased from bits 19-23 to 19-24.
   */
  SB(number, 25, 4, GB(number, 24, 4));
  SB(number, 29, 3, 0);
  ClrBit(number, 24);
  return number;
}
 
struct CMDLChunkHandler : ChunkHandler {
  CMDLChunkHandler() : ChunkHandler('CMDL', CH_TABLE) {}
 
  void Save() const override
  {
    SlTableHeader(_cargomonitor_pair_desc);
 
    TempStorage storage;
 
    int i = 0;
    CargoMonitorMap::const_iterator iter = _cargo_deliveries.begin();
    while (iter != _cargo_deliveries.end()) {
      storage.number = iter->first;
      storage.amount = iter->second;
 
      SlSetArrayIndex(i);
      SlObject(&storage, _cargomonitor_pair_desc);
 
      i++;
      iter++;
    }
  }
 
  void Load() const override
  {
    const std::vector<SaveLoad> slt = SlCompatTableHeader(_cargomonitor_pair_desc, _cargomonitor_pair_sl_compat);
 
    TempStorage storage;
    bool fix = IsSavegameVersionBefore(SLV_FIX_CARGO_MONITOR);
 
    ClearCargoDeliveryMonitoring();
    for (;;) {
      if (SlIterateArray() < 0) break;
      SlObject(&storage, slt);
 
      if (fix) storage.number = FixupCargoMonitor(storage.number);
 
      _cargo_deliveries.emplace(storage.number, storage.amount);
    }
  }
};
 
struct CMPUChunkHandler : ChunkHandler {
  CMPUChunkHandler() : ChunkHandler('CMPU', CH_TABLE) {}
 
  void Save() const override
  {
    SlTableHeader(_cargomonitor_pair_desc);
 
    TempStorage storage;
 
    int i = 0;
    CargoMonitorMap::const_iterator iter = _cargo_pickups.begin();
    while (iter != _cargo_pickups.end()) {
      storage.number = iter->first;
      storage.amount = iter->second;
 
      SlSetArrayIndex(i);
      SlObject(&storage, _cargomonitor_pair_desc);
 
      i++;
      iter++;
    }
  }
 
  void Load() const override
  {
    const std::vector<SaveLoad> slt = SlCompatTableHeader(_cargomonitor_pair_desc, _cargomonitor_pair_sl_compat);
 
    TempStorage storage;
    bool fix = IsSavegameVersionBefore(SLV_FIX_CARGO_MONITOR);
 
    ClearCargoPickupMonitoring();
    for (;;) {
      if (SlIterateArray() < 0) break;
      SlObject(&storage, slt);
 
      if (fix) storage.number = FixupCargoMonitor(storage.number);
 
      _cargo_pickups.emplace(storage.number, storage.amount);
    }
  }
};
 
static const CMDLChunkHandler CMDL;
static const CMPUChunkHandler CMPU;
static const ChunkHandlerRef cargomonitor_chunk_handlers[] = {
  CMDL,
  CMPU,
};
 
extern const ChunkHandlerTable _cargomonitor_chunk_handlers(cargomonitor_chunk_handlers);