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Location: cpp/openttd-patchpack/source/src/saveload/map_sl.cpp
r25751:3154638283de
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Feature: framework to make savegames self-descriptive
We won't be able to make it fully self-descriptive (looking at you
MAP-chunks), but anything else can. With this framework, we can
add headers for each chunk explaining how each chunk looks like
in detail.
They also will all be tables, making it a lot easier to read in
external tooling, and opening the way to consider a database
(like SQLite) to use as savegame format.
Lastly, with the headers in the savegame, you can freely add
fields without needing a savegame version bump; older versions
of OpenTTD will simply ignore the new field. This also means
we can remove all the SLE_CONDNULL, as they are irrelevant.
The next few commits will start using this framework.
We won't be able to make it fully self-descriptive (looking at you
MAP-chunks), but anything else can. With this framework, we can
add headers for each chunk explaining how each chunk looks like
in detail.
They also will all be tables, making it a lot easier to read in
external tooling, and opening the way to consider a database
(like SQLite) to use as savegame format.
Lastly, with the headers in the savegame, you can freely add
fields without needing a savegame version bump; older versions
of OpenTTD will simply ignore the new field. This also means
we can remove all the SLE_CONDNULL, as they are irrelevant.
The next few commits will start using this framework.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 | /*
* 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 map_sl.cpp Code handling saving and loading of map */
#include "../stdafx.h"
#include "../map_func.h"
#include "../core/bitmath_func.hpp"
#include "../fios.h"
#include <array>
#include "saveload.h"
#include "../safeguards.h"
static uint32 _map_dim_x;
static uint32 _map_dim_y;
static const SaveLoad _map_desc[] = {
SLEG_CONDVAR("dim_x", _map_dim_x, SLE_UINT32, SLV_6, SL_MAX_VERSION),
SLEG_CONDVAR("dim_y", _map_dim_y, SLE_UINT32, SLV_6, SL_MAX_VERSION),
};
static void Save_MAPS()
{
_map_dim_x = MapSizeX();
_map_dim_y = MapSizeY();
SlSetArrayIndex(0);
SlGlobList(_map_desc);
}
static void Load_MAPS()
{
if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
SlGlobList(_map_desc);
if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many MAPS entries");
AllocateMap(_map_dim_x, _map_dim_y);
}
static void Check_MAPS()
{
if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
SlGlobList(_map_desc);
if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many MAPS entries");
_load_check_data.map_size_x = _map_dim_x;
_load_check_data.map_size_y = _map_dim_y;
}
static const uint MAP_SL_BUF_SIZE = 4096;
static void Load_MAPT()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].type = buf[j];
}
}
static void Save_MAPT()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].type;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAPH()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].height = buf[j];
}
}
static void Save_MAPH()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].height;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP1()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m1 = buf[j];
}
}
static void Save_MAP1()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m1;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP2()
{
std::array<uint16, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE,
/* In those versions the m2 was 8 bits */
IsSavegameVersionBefore(SLV_5) ? SLE_FILE_U8 | SLE_VAR_U16 : SLE_UINT16
);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m2 = buf[j];
}
}
static void Save_MAP2()
{
std::array<uint16, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size * sizeof(uint16));
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m2;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT16);
}
}
static void Load_MAP3()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m3 = buf[j];
}
}
static void Save_MAP3()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m3;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP4()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m4 = buf[j];
}
}
static void Save_MAP4()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m4;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP5()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m5 = buf[j];
}
}
static void Save_MAP5()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m5;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP6()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
if (IsSavegameVersionBefore(SLV_42)) {
for (TileIndex i = 0; i != size;) {
/* 1024, otherwise we overflow on 64x64 maps! */
SlCopy(buf.data(), 1024, SLE_UINT8);
for (uint j = 0; j != 1024; j++) {
_me[i++].m6 = GB(buf[j], 0, 2);
_me[i++].m6 = GB(buf[j], 2, 2);
_me[i++].m6 = GB(buf[j], 4, 2);
_me[i++].m6 = GB(buf[j], 6, 2);
}
}
} else {
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _me[i++].m6 = buf[j];
}
}
}
static void Save_MAP6()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _me[i++].m6;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP7()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _me[i++].m7 = buf[j];
}
}
static void Save_MAP7()
{
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _me[i++].m7;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP8()
{
std::array<uint16, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT16);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _me[i++].m8 = buf[j];
}
}
static void Save_MAP8()
{
std::array<uint16, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size * sizeof(uint16));
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _me[i++].m8;
SlCopy(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT16);
}
}
static const ChunkHandler map_chunk_handlers[] = {
{ 'MAPS', Save_MAPS, Load_MAPS, nullptr, Check_MAPS, CH_ARRAY },
{ 'MAPT', Save_MAPT, Load_MAPT, nullptr, nullptr, CH_RIFF },
{ 'MAPH', Save_MAPH, Load_MAPH, nullptr, nullptr, CH_RIFF },
{ 'MAPO', Save_MAP1, Load_MAP1, nullptr, nullptr, CH_RIFF },
{ 'MAP2', Save_MAP2, Load_MAP2, nullptr, nullptr, CH_RIFF },
{ 'M3LO', Save_MAP3, Load_MAP3, nullptr, nullptr, CH_RIFF },
{ 'M3HI', Save_MAP4, Load_MAP4, nullptr, nullptr, CH_RIFF },
{ 'MAP5', Save_MAP5, Load_MAP5, nullptr, nullptr, CH_RIFF },
{ 'MAPE', Save_MAP6, Load_MAP6, nullptr, nullptr, CH_RIFF },
{ 'MAP7', Save_MAP7, Load_MAP7, nullptr, nullptr, CH_RIFF },
{ 'MAP8', Save_MAP8, Load_MAP8, nullptr, nullptr, CH_RIFF },
};
extern const ChunkHandlerTable _map_chunk_handlers(map_chunk_handlers);
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