Files @ r15321:b66ded98380f
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Location: cpp/openttd-patchpack/source/src/saveload/engine_sl.cpp

frosch
(svn r19972) -Change: Use the md5sum from the previous save of the game for BaNaNaS instead of the initial (when the grf was added) md5sum from the gamelog. Neither method is 'better', but this way it is independent from the gamelog.
/* $Id$ */

/*
 * 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 <map>

static const SaveLoad _engine_desc[] = {
	 SLE_CONDVAR(Engine, intro_date,          SLE_FILE_U16 | SLE_VAR_I32,  0,  30),
	 SLE_CONDVAR(Engine, intro_date,          SLE_INT32,                  31, SL_MAX_VERSION),
	 SLE_CONDVAR(Engine, age,                 SLE_FILE_U16 | SLE_VAR_I32,  0,  30),
	 SLE_CONDVAR(Engine, age,                 SLE_INT32,                  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,                                                        0, 120),
	     SLE_VAR(Engine, flags,               SLE_UINT8),
	     SLE_VAR(Engine, preview_company_rank,SLE_UINT8),
	     SLE_VAR(Engine, preview_wait,        SLE_UINT8),
	SLE_CONDNULL(1,                                                        0,  44),
	 SLE_CONDVAR(Engine, company_avail,       SLE_FILE_U8  | SLE_VAR_U16,  0, 103),
	 SLE_CONDVAR(Engine, company_avail,       SLE_UINT16,                104, SL_MAX_VERSION),
	 SLE_CONDSTR(Engine, name,                SLE_STR, 0,                 84, SL_MAX_VERSION),

	/* reserve extra space in savegame here. (currently 16 bytes) */
	SLE_CONDNULL(16,                                                       2, SL_MAX_VERSION),

	SLE_END()
};

static std::map<EngineID, Engine> _temp_engine;

Engine *GetTempDataEngine(EngineID index)
{
	return &_temp_engine[index];
}

static void Save_ENGN()
{
	Engine *e;
	FOR_ALL_ENGINES(e) {
		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);
	}
}

/**
 * Copy data from temporary engine array into the real engine pool.
 */
void CopyTempEngineData()
{
	Engine *e;
	FOR_ALL_ENGINES(e) {
		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_company_rank= se->preview_company_rank;
		e->preview_wait        = se->preview_wait;
		e->company_avail       = se->company_avail;
		if (se->name != NULL) e->name = strdup(se->name);
	}

	/* Get rid of temporary data */
	_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()
{
	const EngineIDMapping *end = _engine_mngr.End();
	uint index = 0;
	for (EngineIDMapping *eid = _engine_mngr.Begin(); eid != end; eid++, index++) {
		SlSetArrayIndex(index);
		SlObject(eid, _engine_id_mapping_desc);
	}
}

static void Load_EIDS()
{
	int index;

	_engine_mngr.Clear();

	while ((index = SlIterateArray()) != -1) {
		EngineIDMapping *eid = _engine_mngr.Append();
		SlObject(eid, _engine_id_mapping_desc);
	}
}

extern const ChunkHandler _engine_chunk_handlers[] = {
	{ 'EIDS', Save_EIDS, Load_EIDS, NULL, CH_ARRAY          },
	{ 'ENGN', Save_ENGN, Load_ENGN, NULL, CH_ARRAY          },
	{ 'ENGS', NULL,      Load_ENGS, NULL, CH_RIFF | CH_LAST },
};