game_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 "../debug.h"
 
#include "saveload.h"
#include "compat/game_sl_compat.h"
 
#include "../string_func.h"
#include "../game/game.hpp"
#include "../game/game_config.hpp"
#include "../network/network.h"
#include "../game/game_instance.hpp"
#include "../game/game_text.hpp"
 
#include "../safeguards.h"
 
static std::string _game_saveload_name;
static int         _game_saveload_version;
static std::string _game_saveload_settings;
 
static const SaveLoad _game_script_desc[] = {
     SLEG_SSTR("name",      _game_saveload_name,         SLE_STR),
     SLEG_SSTR("settings",  _game_saveload_settings,     SLE_STR),
      SLEG_VAR("version",   _game_saveload_version,   SLE_UINT32),
};
 
static void SaveReal_GSDT(int)
{
  GameConfig *config = GameConfig::GetConfig();
 
  if (config->HasScript()) {
    _game_saveload_name = config->GetName();
    _game_saveload_version = config->GetVersion();
  } else {
    /* No GameScript is configured for this so store an empty string as name. */
    _game_saveload_name.clear();
    _game_saveload_version = -1;
  }
 
  _game_saveload_settings = config->SettingsToString();
 
  SlObject(nullptr, _game_script_desc);
  Game::Save();
}
 
struct GSDTChunkHandler : ChunkHandler {
  GSDTChunkHandler() : ChunkHandler('GSDT', CH_TABLE) {}
 
  void Load() const override
  {
    const std::vector<SaveLoad> slt = SlCompatTableHeader(_game_script_desc, _game_script_sl_compat);
 
    /* Free all current data */
    GameConfig::GetConfig(GameConfig::SSS_FORCE_GAME)->Change(std::nullopt);
 
    if (SlIterateArray() == -1) return;
 
    _game_saveload_version = -1;
    SlObject(nullptr, slt);
 
    if (_game_mode == GM_MENU || (_networking && !_network_server)) {
      GameInstance::LoadEmpty();
      if (SlIterateArray() != -1) SlErrorCorrupt("Too many GameScript configs");
      return;
    }
 
    GameConfig *config = GameConfig::GetConfig(GameConfig::SSS_FORCE_GAME);
    if (!_game_saveload_name.empty()) {
      config->Change(_game_saveload_name, _game_saveload_version, false);
      if (!config->HasScript()) {
        /* No version of the GameScript available that can load the data. Try to load the
         * latest version of the GameScript instead. */
        config->Change(_game_saveload_name, -1, false);
        if (!config->HasScript()) {
          if (_game_saveload_name.compare("%_dummy") != 0) {
            Debug(script, 0, "The savegame has an GameScript by the name '{}', version {} which is no longer available.", _game_saveload_name, _game_saveload_version);
            Debug(script, 0, "This game will continue to run without GameScript.");
          } else {
            Debug(script, 0, "The savegame had no GameScript available at the time of saving.");
            Debug(script, 0, "This game will continue to run without GameScript.");
          }
        } else {
          Debug(script, 0, "The savegame has an GameScript by the name '{}', version {} which is no longer available.", _game_saveload_name, _game_saveload_version);
          Debug(script, 0, "The latest version of that GameScript has been loaded instead, but it'll not get the savegame data as it's incompatible.");
        }
        /* Make sure the GameScript doesn't get the saveload data, as it was not the
         *  writer of the saveload data in the first place */
        _game_saveload_version = -1;
      }
    }
 
    config->StringToSettings(_game_saveload_settings);
 
    /* Load the GameScript saved data */
    config->SetToLoadData(GameInstance::Load(_game_saveload_version));
 
    if (SlIterateArray() != -1) SlErrorCorrupt("Too many GameScript configs");
  }
 
  void Save() const override
  {
    SlTableHeader(_game_script_desc);
    SlSetArrayIndex(0);
    SlAutolength(SaveReal_GSDT, 0);
  }
};
 
extern GameStrings *_current_data;
 
static std::string _game_saveload_string;
static uint32_t _game_saveload_strings;
 
class SlGameLanguageString : public DefaultSaveLoadHandler<SlGameLanguageString, LanguageStrings> {
public:
  inline static const SaveLoad description[] = {
    SLEG_SSTR("string", _game_saveload_string, SLE_STR | SLF_ALLOW_CONTROL),
  };
  inline const static SaveLoadCompatTable compat_description = _game_language_string_sl_compat;
 
  void Save(LanguageStrings *ls) const override
  {
    SlSetStructListLength(ls->lines.size());
 
    for (const auto &string : ls->lines) {
      _game_saveload_string = string;
      SlObject(nullptr, this->GetDescription());
    }
  }
 
  void Load(LanguageStrings *ls) const override
  {
    uint32_t length = IsSavegameVersionBefore(SLV_SAVELOAD_LIST_LENGTH) ? _game_saveload_strings : (uint32_t)SlGetStructListLength(UINT32_MAX);
 
    for (uint32_t i = 0; i < length; i++) {
      SlObject(nullptr, this->GetLoadDescription());
      ls->lines.emplace_back(_game_saveload_string);
    }
  }
};
 
static const SaveLoad _game_language_desc[] = {
  SLE_SSTR(LanguageStrings, language, SLE_STR),
  SLEG_CONDVAR("count", _game_saveload_strings, SLE_UINT32, SL_MIN_VERSION, SLV_SAVELOAD_LIST_LENGTH),
  SLEG_STRUCTLIST("strings", SlGameLanguageString),
};
 
struct GSTRChunkHandler : ChunkHandler {
  GSTRChunkHandler() : ChunkHandler('GSTR', CH_TABLE) {}
 
  void Load() const override
  {
    const std::vector<SaveLoad> slt = SlCompatTableHeader(_game_language_desc, _game_language_sl_compat);
 
    delete _current_data;
    _current_data = new GameStrings();
 
    while (SlIterateArray() != -1) {
      LanguageStrings ls;
      SlObject(&ls, slt);
      _current_data->raw_strings.push_back(std::move(ls));
    }
 
    /* If there were no strings in the savegame, set GameStrings to nullptr */
    if (_current_data->raw_strings.empty()) {
      delete _current_data;
      _current_data = nullptr;
      return;
    }
 
    _current_data->Compile();
    ReconsiderGameScriptLanguage();
  }
 
  void Save() const override
  {
    SlTableHeader(_game_language_desc);
 
    if (_current_data == nullptr) return;
 
    for (uint i = 0; i < _current_data->raw_strings.size(); i++) {
      SlSetArrayIndex(i);
      SlObject(&_current_data->raw_strings[i], _game_language_desc);
    }
  }
};
 
static const GSTRChunkHandler GSTR;
static const GSDTChunkHandler GSDT;
static const ChunkHandlerRef game_chunk_handlers[] = {
  GSTR,
  GSDT,
};
 
extern const ChunkHandlerTable _game_chunk_handlers(game_chunk_handlers);