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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 engine_sl.cpp Code handling saving and loading of engines */
#include "../stdafx.h"
#include "saveload_internal.h"
#include "../engine_base.h"
#include "../string_func.h"
#include <vector>
#include "../safeguards.h"
static const SaveLoad _engine_desc[] = {
SLE_CONDVAR(Engine, intro_date, SLE_FILE_U16 | SLE_VAR_I32, SL_MIN_VERSION, SLV_31),
SLE_CONDVAR(Engine, intro_date, SLE_INT32, SLV_31, SL_MAX_VERSION),
SLE_CONDVAR(Engine, age, SLE_FILE_U16 | SLE_VAR_I32, SL_MIN_VERSION, SLV_31),
SLE_CONDVAR(Engine, age, SLE_INT32, SLV_31, SL_MAX_VERSION),
SLE_VAR(Engine, reliability, SLE_UINT16),
SLE_VAR(Engine, reliability_spd_dec, SLE_UINT16),
SLE_VAR(Engine, reliability_start, SLE_UINT16),
SLE_VAR(Engine, reliability_max, SLE_UINT16),
SLE_VAR(Engine, reliability_final, SLE_UINT16),
SLE_VAR(Engine, duration_phase_1, SLE_UINT16),
SLE_VAR(Engine, duration_phase_2, SLE_UINT16),
SLE_VAR(Engine, duration_phase_3, SLE_UINT16),
SLE_CONDNULL(1, SL_MIN_VERSION, SLV_121),
SLE_VAR(Engine, flags, SLE_UINT8),
SLE_CONDNULL(1, SL_MIN_VERSION, SLV_179), // old preview_company_rank
SLE_CONDVAR(Engine, preview_asked, SLE_UINT16, SLV_179, SL_MAX_VERSION),
SLE_CONDVAR(Engine, preview_company, SLE_UINT8, SLV_179, SL_MAX_VERSION),
SLE_VAR(Engine, preview_wait, SLE_UINT8),
SLE_CONDNULL(1, SL_MIN_VERSION, SLV_45),
SLE_CONDVAR(Engine, company_avail, SLE_FILE_U8 | SLE_VAR_U16, SL_MIN_VERSION, SLV_104),
SLE_CONDVAR(Engine, company_avail, SLE_UINT16, SLV_104, SL_MAX_VERSION),
SLE_CONDVAR(Engine, company_hidden, SLE_UINT16, SLV_193, SL_MAX_VERSION),
SLE_CONDSSTR(Engine, name, SLE_STR, SLV_84, SL_MAX_VERSION),
SLE_CONDNULL(16, SLV_2, SLV_144), // old reserved space
SLE_END()
};
static std::vector<Engine*> _temp_engine;
/**
* Allocate an Engine structure, but not using the pools.
* The allocated Engine must be freed using FreeEngine;
* @return Allocated engine.
*/
static Engine* CallocEngine()
{
uint8 *zero = CallocT<uint8>(sizeof(Engine));
Engine *engine = new (zero) Engine();
return engine;
}
/**
* Deallocate an Engine constructed by CallocEngine.
* @param e Engine to free.
*/
static void FreeEngine(Engine *e)
{
if (e != nullptr) {
e->~Engine();
free(e);
}
}
Engine *GetTempDataEngine(EngineID index)
{
if (index < _temp_engine.size()) {
return _temp_engine[index];
} else if (index == _temp_engine.size()) {
_temp_engine.push_back(CallocEngine());
return _temp_engine[index];
} else {
NOT_REACHED();
}
}
static void Save_ENGN()
{
for (Engine *e : Engine::Iterate()) {
SlSetArrayIndex(e->index);
SlObject(e, _engine_desc);
}
}
static void Load_ENGN()
{
/* As engine data is loaded before engines are initialized we need to load
* this information into a temporary array. This is then copied into the
* engine pool after processing NewGRFs by CopyTempEngineData(). */
int index;
while ((index = SlIterateArray()) != -1) {
Engine *e = GetTempDataEngine(index);
SlObject(e, _engine_desc);
if (IsSavegameVersionBefore(SLV_179)) {
/* preview_company_rank was replaced with preview_company and preview_asked.
* Just cancel any previews. */
e->flags &= ~4; // ENGINE_OFFER_WINDOW_OPEN
e->preview_company = INVALID_COMPANY;
e->preview_asked = (CompanyMask)-1;
}
}
}
/**
* Copy data from temporary engine array into the real engine pool.
*/
void CopyTempEngineData()
{
for (Engine *e : Engine::Iterate()) {
if (e->index >= _temp_engine.size()) break;
const Engine *se = GetTempDataEngine(e->index);
e->intro_date = se->intro_date;
e->age = se->age;
e->reliability = se->reliability;
e->reliability_spd_dec = se->reliability_spd_dec;
e->reliability_start = se->reliability_start;
e->reliability_max = se->reliability_max;
e->reliability_final = se->reliability_final;
e->duration_phase_1 = se->duration_phase_1;
e->duration_phase_2 = se->duration_phase_2;
e->duration_phase_3 = se->duration_phase_3;
e->flags = se->flags;
e->preview_asked = se->preview_asked;
e->preview_company = se->preview_company;
e->preview_wait = se->preview_wait;
e->company_avail = se->company_avail;
e->company_hidden = se->company_hidden;
e->name = se->name;
}
ResetTempEngineData();
}
void ResetTempEngineData()
{
/* Get rid of temporary data */
for (std::vector<Engine*>::iterator it = _temp_engine.begin(); it != _temp_engine.end(); ++it) {
FreeEngine(*it);
}
_temp_engine.clear();
}
static void Load_ENGS()
{
/* Load old separate String ID list into a temporary array. This
* was always 256 entries. */
StringID names[256];
SlArray(names, lengthof(names), SLE_STRINGID);
/* Copy each string into the temporary engine array. */
for (EngineID engine = 0; engine < lengthof(names); engine++) {
Engine *e = GetTempDataEngine(engine);
e->name = CopyFromOldName(names[engine]);
}
}
/** Save and load the mapping between the engine id in the pool, and the grf file it came from. */
static const SaveLoad _engine_id_mapping_desc[] = {
SLE_VAR(EngineIDMapping, grfid, SLE_UINT32),
SLE_VAR(EngineIDMapping, internal_id, SLE_UINT16),
SLE_VAR(EngineIDMapping, type, SLE_UINT8),
SLE_VAR(EngineIDMapping, substitute_id, SLE_UINT8),
SLE_END()
};
static void Save_EIDS()
{
uint index = 0;
for (EngineIDMapping &eid : _engine_mngr) {
SlSetArrayIndex(index);
SlObject(&eid, _engine_id_mapping_desc);
index++;
}
}
static void Load_EIDS()
{
_engine_mngr.clear();
while (SlIterateArray() != -1) {
EngineIDMapping *eid = &_engine_mngr.emplace_back();
SlObject(eid, _engine_id_mapping_desc);
}
}
extern const ChunkHandler _engine_chunk_handlers[] = {
{ 'EIDS', Save_EIDS, Load_EIDS, nullptr, nullptr, CH_ARRAY },
{ 'ENGN', Save_ENGN, Load_ENGN, nullptr, nullptr, CH_ARRAY },
{ 'ENGS', nullptr, Load_ENGS, nullptr, nullptr, CH_RIFF | CH_LAST },
};
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