src/map.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "map.h"
  21 #include "mapsector.h"
  22 #include "mapblock.h"
  23 #include "filesys.h"
  24 #include "voxel.h"
  25 #include "voxelalgorithms.h"
  26 #include "porting.h"
  27 #include "serialization.h"
  28 #include "nodemetadata.h"
  29 #include "settings.h"
  30 #include "log.h"
  31 #include "profiler.h"
  32 #include "nodedef.h"
  33 #include "gamedef.h"
  34 #include "util/directiontables.h"
  35 #include "util/basic_macros.h"
  36 #include "rollback_interface.h"
  37 #include "environment.h"
  38 #include "reflowscan.h"
  39 #include "emerge.h"
  40 #include "mapgen_v6.h"
  41 #include "mg_biome.h"
  42 #include "config.h"
  43 #include "server.h"
  44 #include "database.h"
  45 #include "database-dummy.h"
  46 #include "database-sqlite3.h"
  47 #include "script/scripting_server.h"
  48 #include <deque>
  49 #include <queue>
  50 #if USE_LEVELDB
  51 #include "database-leveldb.h"
  52 #endif
  53 #if USE_REDIS
  54 #include "database-redis.h"
  55 #endif
  56 #if USE_POSTGRESQL
  57 #include "database-postgresql.h"
  58 #endif
  59
  60
  61 /*
  62         Map
  63 */
  64
  65 Map::Map(std::ostream &dout, IGameDef *gamedef):
  66         m_dout(dout),
  67         m_gamedef(gamedef),
  68         m_nodedef(gamedef->ndef())
  69 {
  70 }
  71
  72 Map::~Map()
  73 {
  74         /*
  75                 Free all MapSectors
  76         */
  77         for (auto &sector : m_sectors) {
  78                 delete sector.second;
  79         }
  80 }
  81
  82 void Map::addEventReceiver(MapEventReceiver *event_receiver)
  83 {
  84         m_event_receivers.insert(event_receiver);
  85 }
  86
  87 void Map::removeEventReceiver(MapEventReceiver *event_receiver)
  88 {
  89         m_event_receivers.erase(event_receiver);
  90 }
  91
  92 void Map::dispatchEvent(MapEditEvent *event)
  93 {
  94         for (MapEventReceiver *event_receiver : m_event_receivers) {
  95                 event_receiver->onMapEditEvent(event);
  96         }
  97 }
  98
  99 MapSector * Map::getSectorNoGenerateNoExNoLock(v2s16 p)
 100 {
 101         if(m_sector_cache != NULL && p == m_sector_cache_p){
 102                 MapSector * sector = m_sector_cache;
 103                 return sector;
 104         }
 105
 106         std::map<v2s16, MapSector*>::iterator n = m_sectors.find(p);
 107
 108         if (n == m_sectors.end())
 109                 return NULL;
 110
 111         MapSector *sector = n->second;
 112
 113         // Cache the last result
 114         m_sector_cache_p = p;
 115         m_sector_cache = sector;
 116
 117         return sector;
 118 }
 119
 120 MapSector * Map::getSectorNoGenerateNoEx(v2s16 p)
 121 {
 122         return getSectorNoGenerateNoExNoLock(p);
 123 }
 124
 125 MapSector * Map::getSectorNoGenerate(v2s16 p)
 126 {
 127         MapSector *sector = getSectorNoGenerateNoEx(p);
 128         if(sector == NULL)
 129                 throw InvalidPositionException();
 130
 131         return sector;
 132 }
 133
 134 MapBlock * Map::getBlockNoCreateNoEx(v3s16 p3d)
 135 {
 136         v2s16 p2d(p3d.X, p3d.Z);
 137         MapSector * sector = getSectorNoGenerateNoEx(p2d);
 138         if(sector == NULL)
 139                 return NULL;
 140         MapBlock *block = sector->getBlockNoCreateNoEx(p3d.Y);
 141         return block;
 142 }
 143
 144 MapBlock * Map::getBlockNoCreate(v3s16 p3d)
 145 {
 146         MapBlock *block = getBlockNoCreateNoEx(p3d);
 147         if(block == NULL)
 148                 throw InvalidPositionException();
 149         return block;
 150 }
 151
 152 bool Map::isNodeUnderground(v3s16 p)
 153 {
 154         v3s16 blockpos = getNodeBlockPos(p);
 155         try{
 156                 MapBlock * block = getBlockNoCreate(blockpos);
 157                 return block->getIsUnderground();
 158         }
 159         catch(InvalidPositionException &e)
 160         {
 161                 return false;
 162         }
 163 }
 164
 165 bool Map::isValidPosition(v3s16 p)
 166 {
 167         v3s16 blockpos = getNodeBlockPos(p);
 168         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 169         return (block != NULL);
 170 }
 171
 172 // Returns a CONTENT_IGNORE node if not found
 173 MapNode Map::getNodeNoEx(v3s16 p, bool *is_valid_position)
 174 {
 175         v3s16 blockpos = getNodeBlockPos(p);
 176         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 177         if (block == NULL) {
 178                 if (is_valid_position != NULL)
 179                         *is_valid_position = false;
 180                 return {CONTENT_IGNORE};
 181         }
 182
 183         v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
 184         bool is_valid_p;
 185         MapNode node = block->getNodeNoCheck(relpos, &is_valid_p);
 186         if (is_valid_position != NULL)
 187                 *is_valid_position = is_valid_p;
 188         return node;
 189 }
 190
 191 #if 0
 192 // Deprecated
 193 // throws InvalidPositionException if not found
 194 // TODO: Now this is deprecated, getNodeNoEx should be renamed
 195 MapNode Map::getNode(v3s16 p)
 196 {
 197         v3s16 blockpos = getNodeBlockPos(p);
 198         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 199         if (block == NULL)
 200                 throw InvalidPositionException();
 201         v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
 202         bool is_valid_position;
 203         MapNode node = block->getNodeNoCheck(relpos, &is_valid_position);
 204         if (!is_valid_position)
 205                 throw InvalidPositionException();
 206         return node;
 207 }
 208 #endif
 209
 210 // throws InvalidPositionException if not found
 211 void Map::setNode(v3s16 p, MapNode & n)
 212 {
 213         v3s16 blockpos = getNodeBlockPos(p);
 214         MapBlock *block = getBlockNoCreate(blockpos);
 215         v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
 216         // Never allow placing CONTENT_IGNORE, it fucks up stuff
 217         if(n.getContent() == CONTENT_IGNORE){
 218                 bool temp_bool;
 219                 errorstream<<"Map::setNode(): Not allowing to place CONTENT_IGNORE"
 220                                 <<" while trying to replace \""
 221                                 <<m_nodedef->get(block->getNodeNoCheck(relpos, &temp_bool)).name
 222                                 <<"\" at "<<PP(p)<<" (block "<<PP(blockpos)<<")"<<std::endl;
 223                 debug_stacks_print_to(infostream);
 224                 return;
 225         }
 226         block->setNodeNoCheck(relpos, n);
 227 }
 228
 229 void Map::addNodeAndUpdate(v3s16 p, MapNode n,
 230                 std::map<v3s16, MapBlock*> &modified_blocks,
 231                 bool remove_metadata)
 232 {
 233         // Collect old node for rollback
 234         RollbackNode rollback_oldnode(this, p, m_gamedef);
 235
 236         // This is needed for updating the lighting
 237         MapNode oldnode = getNodeNoEx(p);
 238
 239         // Remove node metadata
 240         if (remove_metadata) {
 241                 removeNodeMetadata(p);
 242         }
 243
 244         // Set the node on the map
 245         // Ignore light (because calling voxalgo::update_lighting_nodes)
 246         n.setLight(LIGHTBANK_DAY, 0, m_nodedef);
 247         n.setLight(LIGHTBANK_NIGHT, 0, m_nodedef);
 248         setNode(p, n);
 249
 250         // Update lighting
 251         std::vector<std::pair<v3s16, MapNode> > oldnodes;
 252         oldnodes.emplace_back(p, oldnode);
 253         voxalgo::update_lighting_nodes(this, oldnodes, modified_blocks);
 254
 255         for (auto &modified_block : modified_blocks) {
 256                 modified_block.second->expireDayNightDiff();
 257         }
 258
 259         // Report for rollback
 260         if(m_gamedef->rollback())
 261         {
 262                 RollbackNode rollback_newnode(this, p, m_gamedef);
 263                 RollbackAction action;
 264                 action.setSetNode(p, rollback_oldnode, rollback_newnode);
 265                 m_gamedef->rollback()->reportAction(action);
 266         }
 267
 268         /*
 269                 Add neighboring liquid nodes and this node to transform queue.
 270                 (it's vital for the node itself to get updated last, if it was removed.)
 271          */
 272
 273         for (const v3s16 &dir : g_7dirs) {
 274                 v3s16 p2 = p + dir;
 275
 276                 bool is_valid_position;
 277                 MapNode n2 = getNodeNoEx(p2, &is_valid_position);
 278                 if(is_valid_position &&
 279                                 (m_nodedef->get(n2).isLiquid() ||
 280                                 n2.getContent() == CONTENT_AIR))
 281                         m_transforming_liquid.push_back(p2);
 282         }
 283 }
 284
 285 void Map::removeNodeAndUpdate(v3s16 p,
 286                 std::map<v3s16, MapBlock*> &modified_blocks)
 287 {
 288         addNodeAndUpdate(p, MapNode(CONTENT_AIR), modified_blocks, true);
 289 }
 290
 291 bool Map::addNodeWithEvent(v3s16 p, MapNode n, bool remove_metadata)
 292 {
 293         MapEditEvent event;
 294         event.type = remove_metadata ? MEET_ADDNODE : MEET_SWAPNODE;
 295         event.p = p;
 296         event.n = n;
 297
 298         bool succeeded = true;
 299         try{
 300                 std::map<v3s16, MapBlock*> modified_blocks;
 301                 addNodeAndUpdate(p, n, modified_blocks, remove_metadata);
 302
 303                 // Copy modified_blocks to event
 304                 for (auto &modified_block : modified_blocks) {
 305                         event.modified_blocks.insert(modified_block.first);
 306                 }
 307         }
 308         catch(InvalidPositionException &e){
 309                 succeeded = false;
 310         }
 311
 312         dispatchEvent(&event);
 313
 314         return succeeded;
 315 }
 316
 317 bool Map::removeNodeWithEvent(v3s16 p)
 318 {
 319         MapEditEvent event;
 320         event.type = MEET_REMOVENODE;
 321         event.p = p;
 322
 323         bool succeeded = true;
 324         try{
 325                 std::map<v3s16, MapBlock*> modified_blocks;
 326                 removeNodeAndUpdate(p, modified_blocks);
 327
 328                 // Copy modified_blocks to event
 329                 for (auto &modified_block : modified_blocks) {
 330                         event.modified_blocks.insert(modified_block.first);
 331                 }
 332         }
 333         catch(InvalidPositionException &e){
 334                 succeeded = false;
 335         }
 336
 337         dispatchEvent(&event);
 338
 339         return succeeded;
 340 }
 341
 342 struct TimeOrderedMapBlock {
 343         MapSector *sect;
 344         MapBlock *block;
 345
 346         TimeOrderedMapBlock(MapSector *sect, MapBlock *block) :
 347                 sect(sect),
 348                 block(block)
 349         {}
 350
 351         bool operator<(const TimeOrderedMapBlock &b) const
 352         {
 353                 return block->getUsageTimer() < b.block->getUsageTimer();
 354         };
 355 };
 356
 357 /*
 358         Updates usage timers
 359 */
 360 void Map::timerUpdate(float dtime, float unload_timeout, u32 max_loaded_blocks,
 361                 std::vector<v3s16> *unloaded_blocks)
 362 {
 363         bool save_before_unloading = (mapType() == MAPTYPE_SERVER);
 364
 365         // Profile modified reasons
 366         Profiler modprofiler;
 367
 368         std::vector<v2s16> sector_deletion_queue;
 369         u32 deleted_blocks_count = 0;
 370         u32 saved_blocks_count = 0;
 371         u32 block_count_all = 0;
 372
 373         beginSave();
 374
 375         // If there is no practical limit, we spare creation of mapblock_queue
 376         if (max_loaded_blocks == U32_MAX) {
 377                 for (auto &sector_it : m_sectors) {
 378                         MapSector *sector = sector_it.second;
 379
 380                         bool all_blocks_deleted = true;
 381
 382                         MapBlockVect blocks;
 383                         sector->getBlocks(blocks);
 384
 385                         for (MapBlock *block : blocks) {
 386                                 block->incrementUsageTimer(dtime);
 387
 388                                 if (block->refGet() == 0
 389                                                 && block->getUsageTimer() > unload_timeout) {
 390                                         v3s16 p = block->getPos();
 391
 392                                         // Save if modified
 393                                         if (block->getModified() != MOD_STATE_CLEAN
 394                                                         && save_before_unloading) {
 395                                                 modprofiler.add(block->getModifiedReasonString(), 1);
 396                                                 if (!saveBlock(block))
 397                                                         continue;
 398                                                 saved_blocks_count++;
 399                                         }
 400
 401                                         // Delete from memory
 402                                         sector->deleteBlock(block);
 403
 404                                         if (unloaded_blocks)
 405                                                 unloaded_blocks->push_back(p);
 406
 407                                         deleted_blocks_count++;
 408                                 } else {
 409                                         all_blocks_deleted = false;
 410                                         block_count_all++;
 411                                 }
 412                         }
 413
 414                         if (all_blocks_deleted) {
 415                                 sector_deletion_queue.push_back(sector_it.first);
 416                         }
 417                 }
 418         } else {
 419                 std::priority_queue<TimeOrderedMapBlock> mapblock_queue;
 420                 for (auto &sector_it : m_sectors) {
 421                         MapSector *sector = sector_it.second;
 422
 423                         MapBlockVect blocks;
 424                         sector->getBlocks(blocks);
 425
 426                         for (MapBlock *block : blocks) {
 427                                 block->incrementUsageTimer(dtime);
 428                                 mapblock_queue.push(TimeOrderedMapBlock(sector, block));
 429                         }
 430                 }
 431                 block_count_all = mapblock_queue.size();
 432                 // Delete old blocks, and blocks over the limit from the memory
 433                 while (!mapblock_queue.empty() && (mapblock_queue.size() > max_loaded_blocks
 434                                 || mapblock_queue.top().block->getUsageTimer() > unload_timeout)) {
 435                         TimeOrderedMapBlock b = mapblock_queue.top();
 436                         mapblock_queue.pop();
 437
 438                         MapBlock *block = b.block;
 439
 440                         if (block->refGet() != 0)
 441                                 continue;
 442
 443                         v3s16 p = block->getPos();
 444
 445                         // Save if modified
 446                         if (block->getModified() != MOD_STATE_CLEAN && save_before_unloading) {
 447                                 modprofiler.add(block->getModifiedReasonString(), 1);
 448                                 if (!saveBlock(block))
 449                                         continue;
 450                                 saved_blocks_count++;
 451                         }
 452
 453                         // Delete from memory
 454                         b.sect->deleteBlock(block);
 455
 456                         if (unloaded_blocks)
 457                                 unloaded_blocks->push_back(p);
 458
 459                         deleted_blocks_count++;
 460                         block_count_all--;
 461                 }
 462                 // Delete empty sectors
 463                 for (auto &sector_it : m_sectors) {
 464                         if (sector_it.second->empty()) {
 465                                 sector_deletion_queue.push_back(sector_it.first);
 466                         }
 467                 }
 468         }
 469         endSave();
 470
 471         // Finally delete the empty sectors
 472         deleteSectors(sector_deletion_queue);
 473
 474         if(deleted_blocks_count != 0)
 475         {
 476                 PrintInfo(infostream); // ServerMap/ClientMap:
 477                 infostream<<"Unloaded "<<deleted_blocks_count
 478                                 <<" blocks from memory";
 479                 if(save_before_unloading)
 480                         infostream<<", of which "<<saved_blocks_count<<" were written";
 481                 infostream<<", "<<block_count_all<<" blocks in memory";
 482                 infostream<<"."<<std::endl;
 483                 if(saved_blocks_count != 0){
 484                         PrintInfo(infostream); // ServerMap/ClientMap:
 485                         infostream<<"Blocks modified by: "<<std::endl;
 486                         modprofiler.print(infostream);
 487                 }
 488         }
 489 }
 490
 491 void Map::unloadUnreferencedBlocks(std::vector<v3s16> *unloaded_blocks)
 492 {
 493         timerUpdate(0.0, -1.0, 0, unloaded_blocks);
 494 }
 495
 496 void Map::deleteSectors(std::vector<v2s16> &sectorList)
 497 {
 498         for (v2s16 j : sectorList) {
 499                 MapSector *sector = m_sectors[j];
 500                 // If sector is in sector cache, remove it from there
 501                 if(m_sector_cache == sector)
 502                         m_sector_cache = NULL;
 503                 // Remove from map and delete
 504                 m_sectors.erase(j);
 505                 delete sector;
 506         }
 507 }
 508
 509 void Map::PrintInfo(std::ostream &out)
 510 {
 511         out<<"Map: ";
 512 }
 513
 514 #define WATER_DROP_BOOST 4
 515
 516 enum NeighborType {
 517         NEIGHBOR_UPPER,
 518         NEIGHBOR_SAME_LEVEL,
 519         NEIGHBOR_LOWER
 520 };
 521 struct NodeNeighbor {
 522         MapNode n;
 523         NeighborType t;
 524         v3s16 p;
 525         bool l; //can liquid
 526
 527         NodeNeighbor()
 528                 : n(CONTENT_AIR)
 529         { }
 530
 531         NodeNeighbor(const MapNode &node, NeighborType n_type, v3s16 pos)
 532                 : n(node),
 533                   t(n_type),
 534                   p(pos)
 535         { }
 536 };
 537
 538 void Map::transforming_liquid_add(v3s16 p) {
 539         m_transforming_liquid.push_back(p);
 540 }
 541
 542 s32 Map::transforming_liquid_size() {
 543         return m_transforming_liquid.size();
 544 }
 545
 546 void Map::transformLiquids(std::map<v3s16, MapBlock*> &modified_blocks,
 547                 ServerEnvironment *env)
 548 {
 549         DSTACK(FUNCTION_NAME);
 550         //TimeTaker timer("transformLiquids()");
 551
 552         u32 loopcount = 0;
 553         u32 initial_size = m_transforming_liquid.size();
 554
 555         /*if(initial_size != 0)
 556                 infostream<<"transformLiquids(): initial_size="<<initial_size<<std::endl;*/
 557
 558         // list of nodes that due to viscosity have not reached their max level height
 559         std::deque<v3s16> must_reflow;
 560
 561         std::vector<std::pair<v3s16, MapNode> > changed_nodes;
 562
 563         u32 liquid_loop_max = g_settings->getS32("liquid_loop_max");
 564         u32 loop_max = liquid_loop_max;
 565
 566 #if 0
 567
 568         /* If liquid_loop_max is not keeping up with the queue size increase
 569          * loop_max up to a maximum of liquid_loop_max * dedicated_server_step.
 570          */
 571         if (m_transforming_liquid.size() > loop_max * 2) {
 572                 // "Burst" mode
 573                 float server_step = g_settings->getFloat("dedicated_server_step");
 574                 if (m_transforming_liquid_loop_count_multiplier - 1.0 < server_step)
 575                         m_transforming_liquid_loop_count_multiplier *= 1.0 + server_step / 10;
 576         } else {
 577                 m_transforming_liquid_loop_count_multiplier = 1.0;
 578         }
 579
 580         loop_max *= m_transforming_liquid_loop_count_multiplier;
 581 #endif
 582
 583         while (m_transforming_liquid.size() != 0)
 584         {
 585                 // This should be done here so that it is done when continue is used
 586                 if (loopcount >= initial_size || loopcount >= loop_max)
 587                         break;
 588                 loopcount++;
 589
 590                 /*
 591                         Get a queued transforming liquid node
 592                 */
 593                 v3s16 p0 = m_transforming_liquid.front();
 594                 m_transforming_liquid.pop_front();
 595
 596                 MapNode n0 = getNodeNoEx(p0);
 597
 598                 /*
 599                         Collect information about current node
 600                  */
 601                 s8 liquid_level = -1;
 602                 // The liquid node which will be placed there if
 603                 // the liquid flows into this node.
 604                 content_t liquid_kind = CONTENT_IGNORE;
 605                 // The node which will be placed there if liquid
 606                 // can't flow into this node.
 607                 content_t floodable_node = CONTENT_AIR;
 608                 const ContentFeatures &cf = m_nodedef->get(n0);
 609                 LiquidType liquid_type = cf.liquid_type;
 610                 switch (liquid_type) {
 611                         case LIQUID_SOURCE:
 612                                 liquid_level = LIQUID_LEVEL_SOURCE;
 613                                 liquid_kind = m_nodedef->getId(cf.liquid_alternative_flowing);
 614                                 break;
 615                         case LIQUID_FLOWING:
 616                                 liquid_level = (n0.param2 & LIQUID_LEVEL_MASK);
 617                                 liquid_kind = n0.getContent();
 618                                 break;
 619                         case LIQUID_NONE:
 620                                 // if this node is 'floodable', it *could* be transformed
 621                                 // into a liquid, otherwise, continue with the next node.
 622                                 if (!cf.floodable)
 623                                         continue;
 624                                 floodable_node = n0.getContent();
 625                                 liquid_kind = CONTENT_AIR;
 626                                 break;
 627                 }
 628
 629                 /*
 630                         Collect information about the environment
 631                  */
 632                 const v3s16 *dirs = g_6dirs;
 633                 NodeNeighbor sources[6]; // surrounding sources
 634                 int num_sources = 0;
 635                 NodeNeighbor flows[6]; // surrounding flowing liquid nodes
 636                 int num_flows = 0;
 637                 NodeNeighbor airs[6]; // surrounding air
 638                 int num_airs = 0;
 639                 NodeNeighbor neutrals[6]; // nodes that are solid or another kind of liquid
 640                 int num_neutrals = 0;
 641                 bool flowing_down = false;
 642                 bool ignored_sources = false;
 643                 for (u16 i = 0; i < 6; i++) {
 644                         NeighborType nt = NEIGHBOR_SAME_LEVEL;
 645                         switch (i) {
 646                                 case 1:
 647                                         nt = NEIGHBOR_UPPER;
 648                                         break;
 649                                 case 4:
 650                                         nt = NEIGHBOR_LOWER;
 651                                         break;
 652                         }
 653                         v3s16 npos = p0 + dirs[i];
 654                         NodeNeighbor nb(getNodeNoEx(npos), nt, npos);
 655                         const ContentFeatures &cfnb = m_nodedef->get(nb.n);
 656                         switch (m_nodedef->get(nb.n.getContent()).liquid_type) {
 657                                 case LIQUID_NONE:
 658                                         if (cfnb.floodable) {
 659                                                 airs[num_airs++] = nb;
 660                                                 // if the current node is a water source the neighbor
 661                                                 // should be enqueded for transformation regardless of whether the
 662                                                 // current node changes or not.
 663                                                 if (nb.t != NEIGHBOR_UPPER && liquid_type != LIQUID_NONE)
 664                                                         m_transforming_liquid.push_back(npos);
 665                                                 // if the current node happens to be a flowing node, it will start to flow down here.
 666                                                 if (nb.t == NEIGHBOR_LOWER)
 667                                                         flowing_down = true;
 668                                         } else {
 669                                                 neutrals[num_neutrals++] = nb;
 670                                                 if (nb.n.getContent() == CONTENT_IGNORE) {
 671                                                         // If node below is ignore prevent water from
 672                                                         // spreading outwards and otherwise prevent from
 673                                                         // flowing away as ignore node might be the source
 674                                                         if (nb.t == NEIGHBOR_LOWER)
 675                                                                 flowing_down = true;
 676                                                         else
 677                                                                 ignored_sources = true;
 678                                                 }
 679                                         }
 680                                         break;
 681                                 case LIQUID_SOURCE:
 682                                         // if this node is not (yet) of a liquid type, choose the first liquid type we encounter
 683                                         if (liquid_kind == CONTENT_AIR)
 684                                                 liquid_kind = m_nodedef->getId(cfnb.liquid_alternative_flowing);
 685                                         if (m_nodedef->getId(cfnb.liquid_alternative_flowing) != liquid_kind) {
 686                                                 neutrals[num_neutrals++] = nb;
 687                                         } else {
 688                                                 // Do not count bottom source, it will screw things up
 689                                                 if(dirs[i].Y != -1)
 690                                                         sources[num_sources++] = nb;
 691                                         }
 692                                         break;
 693                                 case LIQUID_FLOWING:
 694                                         // if this node is not (yet) of a liquid type, choose the first liquid type we encounter
 695                                         if (liquid_kind == CONTENT_AIR)
 696                                                 liquid_kind = m_nodedef->getId(cfnb.liquid_alternative_flowing);
 697                                         if (m_nodedef->getId(cfnb.liquid_alternative_flowing) != liquid_kind) {
 698                                                 neutrals[num_neutrals++] = nb;
 699                                         } else {
 700                                                 flows[num_flows++] = nb;
 701                                                 if (nb.t == NEIGHBOR_LOWER)
 702                                                         flowing_down = true;
 703                                         }
 704                                         break;
 705                         }
 706                 }
 707
 708                 /*
 709                         decide on the type (and possibly level) of the current node
 710                  */
 711                 content_t new_node_content;
 712                 s8 new_node_level = -1;
 713                 s8 max_node_level = -1;
 714
 715                 u8 range = m_nodedef->get(liquid_kind).liquid_range;
 716                 if (range > LIQUID_LEVEL_MAX + 1)
 717                         range = LIQUID_LEVEL_MAX + 1;
 718
 719                 if ((num_sources >= 2 && m_nodedef->get(liquid_kind).liquid_renewable) || liquid_type == LIQUID_SOURCE) {
 720                         // liquid_kind will be set to either the flowing alternative of the node (if it's a liquid)
 721                         // or the flowing alternative of the first of the surrounding sources (if it's air), so
 722                         // it's perfectly safe to use liquid_kind here to determine the new node content.
 723                         new_node_content = m_nodedef->getId(m_nodedef->get(liquid_kind).liquid_alternative_source);
 724                 } else if (num_sources >= 1 && sources[0].t != NEIGHBOR_LOWER) {
 725                         // liquid_kind is set properly, see above
 726                         max_node_level = new_node_level = LIQUID_LEVEL_MAX;
 727                         if (new_node_level >= (LIQUID_LEVEL_MAX + 1 - range))
 728                                 new_node_content = liquid_kind;
 729                         else
 730                                 new_node_content = floodable_node;
 731                 } else if (ignored_sources && liquid_level >= 0) {
 732                         // Maybe there are neighbouring sources that aren't loaded yet
 733                         // so prevent flowing away.
 734                         new_node_level = liquid_level;
 735                         new_node_content = liquid_kind;
 736                 } else {
 737                         // no surrounding sources, so get the maximum level that can flow into this node
 738                         for (u16 i = 0; i < num_flows; i++) {
 739                                 u8 nb_liquid_level = (flows[i].n.param2 & LIQUID_LEVEL_MASK);
 740                                 switch (flows[i].t) {
 741                                         case NEIGHBOR_UPPER:
 742                                                 if (nb_liquid_level + WATER_DROP_BOOST > max_node_level) {
 743                                                         max_node_level = LIQUID_LEVEL_MAX;
 744                                                         if (nb_liquid_level + WATER_DROP_BOOST < LIQUID_LEVEL_MAX)
 745                                                                 max_node_level = nb_liquid_level + WATER_DROP_BOOST;
 746                                                 } else if (nb_liquid_level > max_node_level) {
 747                                                         max_node_level = nb_liquid_level;
 748                                                 }
 749                                                 break;
 750                                         case NEIGHBOR_LOWER:
 751                                                 break;
 752                                         case NEIGHBOR_SAME_LEVEL:
 753                                                 if ((flows[i].n.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK &&
 754                                                                 nb_liquid_level > 0 && nb_liquid_level - 1 > max_node_level)
 755                                                         max_node_level = nb_liquid_level - 1;
 756                                                 break;
 757                                 }
 758                         }
 759
 760                         u8 viscosity = m_nodedef->get(liquid_kind).liquid_viscosity;
 761                         if (viscosity > 1 && max_node_level != liquid_level) {
 762                                 // amount to gain, limited by viscosity
 763                                 // must be at least 1 in absolute value
 764                                 s8 level_inc = max_node_level - liquid_level;
 765                                 if (level_inc < -viscosity || level_inc > viscosity)
 766                                         new_node_level = liquid_level + level_inc/viscosity;
 767                                 else if (level_inc < 0)
 768                                         new_node_level = liquid_level - 1;
 769                                 else if (level_inc > 0)
 770                                         new_node_level = liquid_level + 1;
 771                                 if (new_node_level != max_node_level)
 772                                         must_reflow.push_back(p0);
 773                         } else {
 774                                 new_node_level = max_node_level;
 775                         }
 776
 777                         if (max_node_level >= (LIQUID_LEVEL_MAX + 1 - range))
 778                                 new_node_content = liquid_kind;
 779                         else
 780                                 new_node_content = floodable_node;
 781
 782                 }
 783
 784                 /*
 785                         check if anything has changed. if not, just continue with the next node.
 786                  */
 787                 if (new_node_content == n0.getContent() &&
 788                                 (m_nodedef->get(n0.getContent()).liquid_type != LIQUID_FLOWING ||
 789                                 ((n0.param2 & LIQUID_LEVEL_MASK) == (u8)new_node_level &&
 790                                 ((n0.param2 & LIQUID_FLOW_DOWN_MASK) == LIQUID_FLOW_DOWN_MASK)
 791                                 == flowing_down)))
 792                         continue;
 793
 794
 795                 /*
 796                         update the current node
 797                  */
 798                 MapNode n00 = n0;
 799                 //bool flow_down_enabled = (flowing_down && ((n0.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK));
 800                 if (m_nodedef->get(new_node_content).liquid_type == LIQUID_FLOWING) {
 801                         // set level to last 3 bits, flowing down bit to 4th bit
 802                         n0.param2 = (flowing_down ? LIQUID_FLOW_DOWN_MASK : 0x00) | (new_node_level & LIQUID_LEVEL_MASK);
 803                 } else {
 804                         // set the liquid level and flow bit to 0
 805                         n0.param2 = ~(LIQUID_LEVEL_MASK | LIQUID_FLOW_DOWN_MASK);
 806                 }
 807
 808                 // change the node.
 809                 n0.setContent(new_node_content);
 810
 811                 // on_flood() the node
 812                 if (floodable_node != CONTENT_AIR) {
 813                         if (env->getScriptIface()->node_on_flood(p0, n00, n0))
 814                                 continue;
 815                 }
 816
 817                 // Ignore light (because calling voxalgo::update_lighting_nodes)
 818                 n0.setLight(LIGHTBANK_DAY, 0, m_nodedef);
 819                 n0.setLight(LIGHTBANK_NIGHT, 0, m_nodedef);
 820
 821                 // Find out whether there is a suspect for this action
 822                 std::string suspect;
 823                 if (m_gamedef->rollback())
 824                         suspect = m_gamedef->rollback()->getSuspect(p0, 83, 1);
 825
 826                 if (m_gamedef->rollback() && !suspect.empty()) {
 827                         // Blame suspect
 828                         RollbackScopeActor rollback_scope(m_gamedef->rollback(), suspect, true);
 829                         // Get old node for rollback
 830                         RollbackNode rollback_oldnode(this, p0, m_gamedef);
 831                         // Set node
 832                         setNode(p0, n0);
 833                         // Report
 834                         RollbackNode rollback_newnode(this, p0, m_gamedef);
 835                         RollbackAction action;
 836                         action.setSetNode(p0, rollback_oldnode, rollback_newnode);
 837                         m_gamedef->rollback()->reportAction(action);
 838                 } else {
 839                         // Set node
 840                         setNode(p0, n0);
 841                 }
 842
 843                 v3s16 blockpos = getNodeBlockPos(p0);
 844                 MapBlock *block = getBlockNoCreateNoEx(blockpos);
 845                 if (block != NULL) {
 846                         modified_blocks[blockpos] =  block;
 847                         changed_nodes.emplace_back(p0, n00);
 848                 }
 849
 850                 /*
 851                         enqueue neighbors for update if neccessary
 852                  */
 853                 switch (m_nodedef->get(n0.getContent()).liquid_type) {
 854                         case LIQUID_SOURCE:
 855                         case LIQUID_FLOWING:
 856                                 // make sure source flows into all neighboring nodes
 857                                 for (u16 i = 0; i < num_flows; i++)
 858                                         if (flows[i].t != NEIGHBOR_UPPER)
 859                                                 m_transforming_liquid.push_back(flows[i].p);
 860                                 for (u16 i = 0; i < num_airs; i++)
 861                                         if (airs[i].t != NEIGHBOR_UPPER)
 862                                                 m_transforming_liquid.push_back(airs[i].p);
 863                                 break;
 864                         case LIQUID_NONE:
 865                                 // this flow has turned to air; neighboring flows might need to do the same
 866                                 for (u16 i = 0; i < num_flows; i++)
 867                                         m_transforming_liquid.push_back(flows[i].p);
 868                                 break;
 869                 }
 870         }
 871         //infostream<<"Map::transformLiquids(): loopcount="<<loopcount<<std::endl;
 872
 873         for (auto &iter : must_reflow)
 874                 m_transforming_liquid.push_back(iter);
 875
 876         voxalgo::update_lighting_nodes(this, changed_nodes, modified_blocks);
 877
 878
 879         /* ----------------------------------------------------------------------
 880          * Manage the queue so that it does not grow indefinately
 881          */
 882         u16 time_until_purge = g_settings->getU16("liquid_queue_purge_time");
 883
 884         if (time_until_purge == 0)
 885                 return; // Feature disabled
 886
 887         time_until_purge *= 1000;       // seconds -> milliseconds
 888
 889         u64 curr_time = porting::getTimeMs();
 890         u32 prev_unprocessed = m_unprocessed_count;
 891         m_unprocessed_count = m_transforming_liquid.size();
 892
 893         // if unprocessed block count is decreasing or stable
 894         if (m_unprocessed_count <= prev_unprocessed) {
 895                 m_queue_size_timer_started = false;
 896         } else {
 897                 if (!m_queue_size_timer_started)
 898                         m_inc_trending_up_start_time = curr_time;
 899                 m_queue_size_timer_started = true;
 900         }
 901
 902         // Account for curr_time overflowing
 903         if (m_queue_size_timer_started && m_inc_trending_up_start_time > curr_time)
 904                 m_queue_size_timer_started = false;
 905
 906         /* If the queue has been growing for more than liquid_queue_purge_time seconds
 907          * and the number of unprocessed blocks is still > liquid_loop_max then we
 908          * cannot keep up; dump the oldest blocks from the queue so that the queue
 909          * has liquid_loop_max items in it
 910          */
 911         if (m_queue_size_timer_started
 912                         && curr_time - m_inc_trending_up_start_time > time_until_purge
 913                         && m_unprocessed_count > liquid_loop_max) {
 914
 915                 size_t dump_qty = m_unprocessed_count - liquid_loop_max;
 916
 917                 infostream << "transformLiquids(): DUMPING " << dump_qty
 918                            << " blocks from the queue" << std::endl;
 919
 920                 while (dump_qty--)
 921                         m_transforming_liquid.pop_front();
 922
 923                 m_queue_size_timer_started = false; // optimistically assume we can keep up now
 924                 m_unprocessed_count = m_transforming_liquid.size();
 925         }
 926 }
 927
 928 std::vector<v3s16> Map::findNodesWithMetadata(v3s16 p1, v3s16 p2)
 929 {
 930         std::vector<v3s16> positions_with_meta;
 931
 932         sortBoxVerticies(p1, p2);
 933         v3s16 bpmin = getNodeBlockPos(p1);
 934         v3s16 bpmax = getNodeBlockPos(p2);
 935
 936         VoxelArea area(p1, p2);
 937
 938         for (s16 z = bpmin.Z; z <= bpmax.Z; z++)
 939         for (s16 y = bpmin.Y; y <= bpmax.Y; y++)
 940         for (s16 x = bpmin.X; x <= bpmax.X; x++) {
 941                 v3s16 blockpos(x, y, z);
 942
 943                 MapBlock *block = getBlockNoCreateNoEx(blockpos);
 944                 if (!block) {
 945                         verbosestream << "Map::getNodeMetadata(): Need to emerge "
 946                                 << PP(blockpos) << std::endl;
 947                         block = emergeBlock(blockpos, false);
 948                 }
 949                 if (!block) {
 950                         infostream << "WARNING: Map::getNodeMetadata(): Block not found"
 951                                 << std::endl;
 952                         continue;
 953                 }
 954
 955                 v3s16 p_base = blockpos * MAP_BLOCKSIZE;
 956                 std::vector<v3s16> keys = block->m_node_metadata.getAllKeys();
 957                 for (size_t i = 0; i != keys.size(); i++) {
 958                         v3s16 p(keys[i] + p_base);
 959                         if (!area.contains(p))
 960                                 continue;
 961
 962                         positions_with_meta.push_back(p);
 963                 }
 964         }
 965
 966         return positions_with_meta;
 967 }
 968
 969 NodeMetadata *Map::getNodeMetadata(v3s16 p)
 970 {
 971         v3s16 blockpos = getNodeBlockPos(p);
 972         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
 973         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 974         if(!block){
 975                 infostream<<"Map::getNodeMetadata(): Need to emerge "
 976                                 <<PP(blockpos)<<std::endl;
 977                 block = emergeBlock(blockpos, false);
 978         }
 979         if(!block){
 980                 warningstream<<"Map::getNodeMetadata(): Block not found"
 981                                 <<std::endl;
 982                 return NULL;
 983         }
 984         NodeMetadata *meta = block->m_node_metadata.get(p_rel);
 985         return meta;
 986 }
 987
 988 bool Map::setNodeMetadata(v3s16 p, NodeMetadata *meta)
 989 {
 990         v3s16 blockpos = getNodeBlockPos(p);
 991         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
 992         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 993         if(!block){
 994                 infostream<<"Map::setNodeMetadata(): Need to emerge "
 995                                 <<PP(blockpos)<<std::endl;
 996                 block = emergeBlock(blockpos, false);
 997         }
 998         if(!block){
 999                 warningstream<<"Map::setNodeMetadata(): Block not found"
1000                                 <<std::endl;
1001                 return false;
1002         }
1003         block->m_node_metadata.set(p_rel, meta);
1004         return true;
1005 }
1006
1007 void Map::removeNodeMetadata(v3s16 p)
1008 {
1009         v3s16 blockpos = getNodeBlockPos(p);
1010         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
1011         MapBlock *block = getBlockNoCreateNoEx(blockpos);
1012         if(block == NULL)
1013         {
1014                 warningstream<<"Map::removeNodeMetadata(): Block not found"
1015                                 <<std::endl;
1016                 return;
1017         }
1018         block->m_node_metadata.remove(p_rel);
1019 }
1020
1021 NodeTimer Map::getNodeTimer(v3s16 p)
1022 {
1023         v3s16 blockpos = getNodeBlockPos(p);
1024         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
1025         MapBlock *block = getBlockNoCreateNoEx(blockpos);
1026         if(!block){
1027                 infostream<<"Map::getNodeTimer(): Need to emerge "
1028                                 <<PP(blockpos)<<std::endl;
1029                 block = emergeBlock(blockpos, false);
1030         }
1031         if(!block){
1032                 warningstream<<"Map::getNodeTimer(): Block not found"
1033                                 <<std::endl;
1034                 return NodeTimer();
1035         }
1036         NodeTimer t = block->m_node_timers.get(p_rel);
1037         NodeTimer nt(t.timeout, t.elapsed, p);
1038         return nt;
1039 }
1040
1041 void Map::setNodeTimer(const NodeTimer &t)
1042 {
1043         v3s16 p = t.position;
1044         v3s16 blockpos = getNodeBlockPos(p);
1045         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
1046         MapBlock *block = getBlockNoCreateNoEx(blockpos);
1047         if(!block){
1048                 infostream<<"Map::setNodeTimer(): Need to emerge "
1049                                 <<PP(blockpos)<<std::endl;
1050                 block = emergeBlock(blockpos, false);
1051         }
1052         if(!block){
1053                 warningstream<<"Map::setNodeTimer(): Block not found"
1054                                 <<std::endl;
1055                 return;
1056         }
1057         NodeTimer nt(t.timeout, t.elapsed, p_rel);
1058         block->m_node_timers.set(nt);
1059 }
1060
1061 void Map::removeNodeTimer(v3s16 p)
1062 {
1063         v3s16 blockpos = getNodeBlockPos(p);
1064         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
1065         MapBlock *block = getBlockNoCreateNoEx(blockpos);
1066         if(block == NULL)
1067         {
1068                 warningstream<<"Map::removeNodeTimer(): Block not found"
1069                                 <<std::endl;
1070                 return;
1071         }
1072         block->m_node_timers.remove(p_rel);
1073 }
1074
1075 bool Map::isOccluded(v3s16 p0, v3s16 p1, float step, float stepfac,
1076                 float start_off, float end_off, u32 needed_count)
1077 {
1078         float d0 = (float)BS * p0.getDistanceFrom(p1);
1079         v3s16 u0 = p1 - p0;
1080         v3f uf = v3f(u0.X, u0.Y, u0.Z) * BS;
1081         uf.normalize();
1082         v3f p0f = v3f(p0.X, p0.Y, p0.Z) * BS;
1083         u32 count = 0;
1084         for(float s=start_off; s<d0+end_off; s+=step){
1085                 v3f pf = p0f + uf * s;
1086                 v3s16 p = floatToInt(pf, BS);
1087                 MapNode n = getNodeNoEx(p);
1088                 const ContentFeatures &f = m_nodedef->get(n);
1089                 if(f.drawtype == NDT_NORMAL){
1090                         // not transparent, see ContentFeature::updateTextures
1091                         count++;
1092                         if(count >= needed_count)
1093                                 return true;
1094                 }
1095                 step *= stepfac;
1096         }
1097         return false;
1098 }
1099
1100 bool Map::isBlockOccluded(MapBlock *block, v3s16 cam_pos_nodes) {
1101         v3s16 cpn = block->getPos() * MAP_BLOCKSIZE;
1102         cpn += v3s16(MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2);
1103         float step = BS * 1;
1104         float stepfac = 1.1;
1105         float startoff = BS * 1;
1106         // The occlusion search of 'isOccluded()' must stop short of the target
1107         // point by distance 'endoff' (end offset) to not enter the target mapblock.
1108         // For the 8 mapblock corners 'endoff' must therefore be the maximum diagonal
1109         // of a mapblock, because we must consider all view angles.
1110         // sqrt(1^2 + 1^2 + 1^2) = 1.732
1111         float endoff = -BS * MAP_BLOCKSIZE * 1.732050807569;
1112         s16 bs2 = MAP_BLOCKSIZE / 2 + 1;
1113         // to reduce the likelihood of falsely occluded blocks
1114         // require at least two solid blocks
1115         // this is a HACK, we should think of a more precise algorithm
1116         u32 needed_count = 2;
1117
1118         return (
1119                 // For the central point of the mapblock 'endoff' can be halved
1120                 isOccluded(cam_pos_nodes, cpn,
1121                         step, stepfac, startoff, endoff / 2.0f, needed_count) &&
1122                 isOccluded(cam_pos_nodes, cpn + v3s16(bs2,bs2,bs2),
1123                         step, stepfac, startoff, endoff, needed_count) &&
1124                 isOccluded(cam_pos_nodes, cpn + v3s16(bs2,bs2,-bs2),
1125                         step, stepfac, startoff, endoff, needed_count) &&
1126                 isOccluded(cam_pos_nodes, cpn + v3s16(bs2,-bs2,bs2),
1127                         step, stepfac, startoff, endoff, needed_count) &&
1128                 isOccluded(cam_pos_nodes, cpn + v3s16(bs2,-bs2,-bs2),
1129                         step, stepfac, startoff, endoff, needed_count) &&
1130                 isOccluded(cam_pos_nodes, cpn + v3s16(-bs2,bs2,bs2),
1131                         step, stepfac, startoff, endoff, needed_count) &&
1132                 isOccluded(cam_pos_nodes, cpn + v3s16(-bs2,bs2,-bs2),
1133                         step, stepfac, startoff, endoff, needed_count) &&
1134                 isOccluded(cam_pos_nodes, cpn + v3s16(-bs2,-bs2,bs2),
1135                         step, stepfac, startoff, endoff, needed_count) &&
1136                 isOccluded(cam_pos_nodes, cpn + v3s16(-bs2,-bs2,-bs2),
1137                         step, stepfac, startoff, endoff, needed_count));
1138 }
1139
1140 /*
1141         ServerMap
1142 */
1143 ServerMap::ServerMap(const std::string &savedir, IGameDef *gamedef,
1144                 EmergeManager *emerge):
1145         Map(dout_server, gamedef),
1146         settings_mgr(g_settings, savedir + DIR_DELIM + "map_meta.txt"),
1147         m_emerge(emerge)
1148 {
1149         verbosestream<<FUNCTION_NAME<<std::endl;
1150
1151         // Tell the EmergeManager about our MapSettingsManager
1152         emerge->map_settings_mgr = &settings_mgr;
1153
1154         /*
1155                 Try to load map; if not found, create a new one.
1156         */
1157
1158         // Determine which database backend to use
1159         std::string conf_path = savedir + DIR_DELIM + "world.mt";
1160         Settings conf;
1161         bool succeeded = conf.readConfigFile(conf_path.c_str());
1162         if (!succeeded || !conf.exists("backend")) {
1163                 // fall back to sqlite3
1164                 conf.set("backend", "sqlite3");
1165         }
1166         std::string backend = conf.get("backend");
1167         dbase = createDatabase(backend, savedir, conf);
1168
1169         if (!conf.updateConfigFile(conf_path.c_str()))
1170                 errorstream << "ServerMap::ServerMap(): Failed to update world.mt!" << std::endl;
1171
1172         m_savedir = savedir;
1173         m_map_saving_enabled = false;
1174
1175         try {
1176                 // If directory exists, check contents and load if possible
1177                 if (fs::PathExists(m_savedir)) {
1178                         // If directory is empty, it is safe to save into it.
1179                         if (fs::GetDirListing(m_savedir).empty()) {
1180                                 infostream<<"ServerMap: Empty save directory is valid."
1181                                                 <<std::endl;
1182                                 m_map_saving_enabled = true;
1183                         }
1184                         else
1185                         {
1186
1187                                 if (settings_mgr.loadMapMeta()) {
1188                                         infostream << "ServerMap: Metadata loaded from "
1189                                                 << savedir << std::endl;
1190                                 } else {
1191                                         infostream << "ServerMap: Metadata could not be loaded "
1192                                                 "from " << savedir << ", assuming valid save "
1193                                                 "directory." << std::endl;
1194                                 }
1195
1196                                 m_map_saving_enabled = true;
1197                                 // Map loaded, not creating new one
1198                                 return;
1199                         }
1200                 }
1201                 // If directory doesn't exist, it is safe to save to it
1202                 else{
1203                         m_map_saving_enabled = true;
1204                 }
1205         }
1206         catch(std::exception &e)
1207         {
1208                 warningstream<<"ServerMap: Failed to load map from "<<savedir
1209                                 <<", exception: "<<e.what()<<std::endl;
1210                 infostream<<"Please remove the map or fix it."<<std::endl;
1211                 warningstream<<"Map saving will be disabled."<<std::endl;
1212         }
1213 }
1214
1215 ServerMap::~ServerMap()
1216 {
1217         verbosestream<<FUNCTION_NAME<<std::endl;
1218
1219         try
1220         {
1221                 if (m_map_saving_enabled) {
1222                         // Save only changed parts
1223                         save(MOD_STATE_WRITE_AT_UNLOAD);
1224                         infostream << "ServerMap: Saved map to " << m_savedir << std::endl;
1225                 } else {
1226                         infostream << "ServerMap: Map not saved" << std::endl;
1227                 }
1228         }
1229         catch(std::exception &e)
1230         {
1231                 infostream<<"ServerMap: Failed to save map to "<<m_savedir
1232                                 <<", exception: "<<e.what()<<std::endl;
1233         }
1234
1235         /*
1236                 Close database if it was opened
1237         */
1238         delete dbase;
1239
1240 #if 0
1241         /*
1242                 Free all MapChunks
1243         */
1244         core::map<v2s16, MapChunk*>::Iterator i = m_chunks.getIterator();
1245         for(; i.atEnd() == false; i++)
1246         {
1247                 MapChunk *chunk = i.getNode()->getValue();
1248                 delete chunk;
1249         }
1250 #endif
1251 }
1252
1253 MapgenParams *ServerMap::getMapgenParams()
1254 {
1255         // getMapgenParams() should only ever be called after Server is initialized
1256         assert(settings_mgr.mapgen_params != NULL);
1257         return settings_mgr.mapgen_params;
1258 }
1259
1260 u64 ServerMap::getSeed()
1261 {
1262         return getMapgenParams()->seed;
1263 }
1264
1265 s16 ServerMap::getWaterLevel()
1266 {
1267         return getMapgenParams()->water_level;
1268 }
1269
1270 bool ServerMap::saoPositionOverLimit(const v3f &p)
1271 {
1272         return getMapgenParams()->saoPosOverLimit(p);
1273 }
1274
1275 bool ServerMap::blockpos_over_mapgen_limit(v3s16 p)
1276 {
1277         const s16 mapgen_limit_bp = rangelim(
1278                 getMapgenParams()->mapgen_limit, 0, MAX_MAP_GENERATION_LIMIT) /
1279                 MAP_BLOCKSIZE;
1280         return p.X < -mapgen_limit_bp ||
1281                 p.X >  mapgen_limit_bp ||
1282                 p.Y < -mapgen_limit_bp ||
1283                 p.Y >  mapgen_limit_bp ||
1284                 p.Z < -mapgen_limit_bp ||
1285                 p.Z >  mapgen_limit_bp;
1286 }
1287
1288 bool ServerMap::initBlockMake(v3s16 blockpos, BlockMakeData *data)
1289 {
1290         s16 csize = getMapgenParams()->chunksize;
1291         v3s16 bpmin = EmergeManager::getContainingChunk(blockpos, csize);
1292         v3s16 bpmax = bpmin + v3s16(1, 1, 1) * (csize - 1);
1293
1294         bool enable_mapgen_debug_info = m_emerge->enable_mapgen_debug_info;
1295         EMERGE_DBG_OUT("initBlockMake(): " PP(bpmin) " - " PP(bpmax));
1296
1297         v3s16 extra_borders(1, 1, 1);
1298         v3s16 full_bpmin = bpmin - extra_borders;
1299         v3s16 full_bpmax = bpmax + extra_borders;
1300
1301         // Do nothing if not inside mapgen limits (+-1 because of neighbors)
1302         if (blockpos_over_mapgen_limit(full_bpmin) ||
1303                         blockpos_over_mapgen_limit(full_bpmax))
1304                 return false;
1305
1306         data->seed = getSeed();
1307         data->blockpos_min = bpmin;
1308         data->blockpos_max = bpmax;
1309         data->blockpos_requested = blockpos;
1310         data->nodedef = m_nodedef;
1311
1312         /*
1313                 Create the whole area of this and the neighboring blocks
1314         */
1315         for (s16 x = full_bpmin.X; x <= full_bpmax.X; x++)
1316         for (s16 z = full_bpmin.Z; z <= full_bpmax.Z; z++) {
1317                 v2s16 sectorpos(x, z);
1318                 // Sector metadata is loaded from disk if not already loaded.
1319                 MapSector *sector = createSector(sectorpos);
1320                 FATAL_ERROR_IF(sector == NULL, "createSector() failed");
1321
1322                 for (s16 y = full_bpmin.Y; y <= full_bpmax.Y; y++) {
1323                         v3s16 p(x, y, z);
1324
1325                         MapBlock *block = emergeBlock(p, false);
1326                         if (block == NULL) {
1327                                 block = createBlock(p);
1328
1329                                 // Block gets sunlight if this is true.
1330                                 // Refer to the map generator heuristics.
1331                                 bool ug = m_emerge->isBlockUnderground(p);
1332                                 block->setIsUnderground(ug);
1333                         }
1334                 }
1335         }
1336
1337         /*
1338                 Now we have a big empty area.
1339
1340                 Make a ManualMapVoxelManipulator that contains this and the
1341                 neighboring blocks
1342         */
1343
1344         data->vmanip = new MMVManip(this);
1345         data->vmanip->initialEmerge(full_bpmin, full_bpmax);
1346
1347         // Note: we may need this again at some point.
1348 #if 0
1349         // Ensure none of the blocks to be generated were marked as
1350         // containing CONTENT_IGNORE
1351         for (s16 z = blockpos_min.Z; z <= blockpos_max.Z; z++) {
1352                 for (s16 y = blockpos_min.Y; y <= blockpos_max.Y; y++) {
1353                         for (s16 x = blockpos_min.X; x <= blockpos_max.X; x++) {
1354                                 core::map<v3s16, u8>::Node *n;
1355                                 n = data->vmanip->m_loaded_blocks.find(v3s16(x, y, z));
1356                                 if (n == NULL)
1357                                         continue;
1358                                 u8 flags = n->getValue();
1359                                 flags &= ~VMANIP_BLOCK_CONTAINS_CIGNORE;
1360                                 n->setValue(flags);
1361                         }
1362                 }
1363         }
1364 #endif
1365
1366         // Data is ready now.
1367         return true;
1368 }
1369
1370 void ServerMap::finishBlockMake(BlockMakeData *data,
1371         std::map<v3s16, MapBlock*> *changed_blocks)
1372 {
1373         v3s16 bpmin = data->blockpos_min;
1374         v3s16 bpmax = data->blockpos_max;
1375
1376         v3s16 extra_borders(1, 1, 1);
1377
1378         bool enable_mapgen_debug_info = m_emerge->enable_mapgen_debug_info;
1379         EMERGE_DBG_OUT("finishBlockMake(): " PP(bpmin) " - " PP(bpmax));
1380
1381         /*
1382                 Blit generated stuff to map
1383                 NOTE: blitBackAll adds nearly everything to changed_blocks
1384         */
1385         data->vmanip->blitBackAll(changed_blocks);
1386
1387         EMERGE_DBG_OUT("finishBlockMake: changed_blocks.size()="
1388                 << changed_blocks->size());
1389
1390         /*
1391                 Copy transforming liquid information
1392         */
1393         while (data->transforming_liquid.size()) {
1394                 m_transforming_liquid.push_back(data->transforming_liquid.front());
1395                 data->transforming_liquid.pop_front();
1396         }
1397
1398         for (auto &changed_block : *changed_blocks) {
1399                 MapBlock *block = changed_block.second;
1400                 if (!block)
1401                         continue;
1402                 /*
1403                         Update day/night difference cache of the MapBlocks
1404                 */
1405                 block->expireDayNightDiff();
1406                 /*
1407                         Set block as modified
1408                 */
1409                 block->raiseModified(MOD_STATE_WRITE_NEEDED,
1410                         MOD_REASON_EXPIRE_DAYNIGHTDIFF);
1411         }
1412
1413         /*
1414                 Set central blocks as generated
1415         */
1416         for (s16 x = bpmin.X; x <= bpmax.X; x++)
1417         for (s16 z = bpmin.Z; z <= bpmax.Z; z++)
1418         for (s16 y = bpmin.Y; y <= bpmax.Y; y++) {
1419                 MapBlock *block = getBlockNoCreateNoEx(v3s16(x, y, z));
1420                 if (!block)
1421                         continue;
1422
1423                 block->setGenerated(true);
1424         }
1425
1426         /*
1427                 Save changed parts of map
1428                 NOTE: Will be saved later.
1429         */
1430         //save(MOD_STATE_WRITE_AT_UNLOAD);
1431 }
1432
1433 MapSector *ServerMap::createSector(v2s16 p2d)
1434 {
1435         DSTACKF("%s: p2d=(%d,%d)",
1436                         FUNCTION_NAME,
1437                         p2d.X, p2d.Y);
1438
1439         /*
1440                 Check if it exists already in memory
1441         */
1442         MapSector *sector = getSectorNoGenerateNoEx(p2d);
1443         if (sector)
1444                 return sector;
1445
1446         /*
1447                 Do not create over max mapgen limit
1448         */
1449         const s16 max_limit_bp = MAX_MAP_GENERATION_LIMIT / MAP_BLOCKSIZE;
1450         if (p2d.X < -max_limit_bp ||
1451                         p2d.X >  max_limit_bp ||
1452                         p2d.Y < -max_limit_bp ||
1453                         p2d.Y >  max_limit_bp)
1454                 throw InvalidPositionException("createSector(): pos. over max mapgen limit");
1455
1456         /*
1457                 Generate blank sector
1458         */
1459
1460         sector = new MapSector(this, p2d, m_gamedef);
1461
1462         // Sector position on map in nodes
1463         //v2s16 nodepos2d = p2d * MAP_BLOCKSIZE;
1464
1465         /*
1466                 Insert to container
1467         */
1468         m_sectors[p2d] = sector;
1469
1470         return sector;
1471 }
1472
1473 #if 0
1474 /*
1475         This is a quick-hand function for calling makeBlock().
1476 */
1477 MapBlock * ServerMap::generateBlock(
1478                 v3s16 p,
1479                 std::map<v3s16, MapBlock*> &modified_blocks
1480 )
1481 {
1482         DSTACKF("%s: p=(%d,%d,%d)", FUNCTION_NAME, p.X, p.Y, p.Z);
1483
1484         /*infostream<<"generateBlock(): "
1485                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"
1486                         <<std::endl;*/
1487
1488         bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
1489
1490         TimeTaker timer("generateBlock");
1491
1492         //MapBlock *block = original_dummy;
1493
1494         v2s16 p2d(p.X, p.Z);
1495         v2s16 p2d_nodes = p2d * MAP_BLOCKSIZE;
1496
1497         /*
1498                 Do not generate over-limit
1499         */
1500         if(blockpos_over_limit(p))
1501         {
1502                 infostream<<FUNCTION_NAME<<": Block position over limit"<<std::endl;
1503                 throw InvalidPositionException("generateBlock(): pos. over limit");
1504         }
1505
1506         /*
1507                 Create block make data
1508         */
1509         BlockMakeData data;
1510         initBlockMake(&data, p);
1511
1512         /*
1513                 Generate block
1514         */
1515         {
1516                 TimeTaker t("mapgen::make_block()");
1517                 mapgen->makeChunk(&data);
1518                 //mapgen::make_block(&data);
1519
1520                 if(enable_mapgen_debug_info == false)
1521                         t.stop(true); // Hide output
1522         }
1523
1524         /*
1525                 Blit data back on map, update lighting, add mobs and whatever this does
1526         */
1527         finishBlockMake(&data, modified_blocks);
1528
1529         /*
1530                 Get central block
1531         */
1532         MapBlock *block = getBlockNoCreateNoEx(p);
1533
1534 #if 0
1535         /*
1536                 Check result
1537         */
1538         if(block)
1539         {
1540                 bool erroneus_content = false;
1541                 for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
1542                 for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
1543                 for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
1544                 {
1545                         v3s16 p(x0,y0,z0);
1546                         MapNode n = block->getNode(p);
1547                         if(n.getContent() == CONTENT_IGNORE)
1548                         {
1549                                 infostream<<"CONTENT_IGNORE at "
1550                                                 <<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"
1551                                                 <<std::endl;
1552                                 erroneus_content = true;
1553                                 assert(0);
1554                         }
1555                 }
1556                 if(erroneus_content)
1557                 {
1558                         assert(0);
1559                 }
1560         }
1561 #endif
1562
1563 #if 0
1564         /*
1565                 Generate a completely empty block
1566         */
1567         if(block)
1568         {
1569                 for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
1570                 for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
1571                 {
1572                         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
1573                         {
1574                                 MapNode n;
1575                                 n.setContent(CONTENT_AIR);
1576                                 block->setNode(v3s16(x0,y0,z0), n);
1577                         }
1578                 }
1579         }
1580 #endif
1581
1582         if(enable_mapgen_debug_info == false)
1583                 timer.stop(true); // Hide output
1584
1585         return block;
1586 }
1587 #endif
1588
1589 MapBlock * ServerMap::createBlock(v3s16 p)
1590 {
1591         DSTACKF("%s: p=(%d,%d,%d)",
1592                         FUNCTION_NAME, p.X, p.Y, p.Z);
1593
1594         /*
1595                 Do not create over max mapgen limit
1596         */
1597         if (blockpos_over_max_limit(p))
1598                 throw InvalidPositionException("createBlock(): pos. over max mapgen limit");
1599
1600         v2s16 p2d(p.X, p.Z);
1601         s16 block_y = p.Y;
1602         /*
1603                 This will create or load a sector if not found in memory.
1604                 If block exists on disk, it will be loaded.
1605
1606                 NOTE: On old save formats, this will be slow, as it generates
1607                       lighting on blocks for them.
1608         */
1609         MapSector *sector;
1610         try {
1611                 sector = createSector(p2d);
1612         } catch (InvalidPositionException &e) {
1613                 infostream<<"createBlock: createSector() failed"<<std::endl;
1614                 throw e;
1615         }
1616
1617         /*
1618                 Try to get a block from the sector
1619         */
1620
1621         MapBlock *block = sector->getBlockNoCreateNoEx(block_y);
1622         if (block) {
1623                 if(block->isDummy())
1624                         block->unDummify();
1625                 return block;
1626         }
1627         // Create blank
1628         block = sector->createBlankBlock(block_y);
1629
1630         return block;
1631 }
1632
1633 MapBlock * ServerMap::emergeBlock(v3s16 p, bool create_blank)
1634 {
1635         DSTACKF("%s: p=(%d,%d,%d), create_blank=%d",
1636                         FUNCTION_NAME,
1637                         p.X, p.Y, p.Z, create_blank);
1638
1639         {
1640                 MapBlock *block = getBlockNoCreateNoEx(p);
1641                 if (block && !block->isDummy())
1642                         return block;
1643         }
1644
1645         {
1646                 MapBlock *block = loadBlock(p);
1647                 if(block)
1648                         return block;
1649         }
1650
1651         if (create_blank) {
1652                 MapSector *sector = createSector(v2s16(p.X, p.Z));
1653                 MapBlock *block = sector->createBlankBlock(p.Y);
1654
1655                 return block;
1656         }
1657
1658         return NULL;
1659 }
1660
1661 MapBlock *ServerMap::getBlockOrEmerge(v3s16 p3d)
1662 {
1663         MapBlock *block = getBlockNoCreateNoEx(p3d);
1664         if (block == NULL)
1665                 m_emerge->enqueueBlockEmerge(PEER_ID_INEXISTENT, p3d, false);
1666
1667         return block;
1668 }
1669
1670 // N.B.  This requires no synchronization, since data will not be modified unless
1671 // the VoxelManipulator being updated belongs to the same thread.
1672 void ServerMap::updateVManip(v3s16 pos)
1673 {
1674         Mapgen *mg = m_emerge->getCurrentMapgen();
1675         if (!mg)
1676                 return;
1677
1678         MMVManip *vm = mg->vm;
1679         if (!vm)
1680                 return;
1681
1682         if (!vm->m_area.contains(pos))
1683                 return;
1684
1685         s32 idx = vm->m_area.index(pos);
1686         vm->m_data[idx] = getNodeNoEx(pos);
1687         vm->m_flags[idx] &= ~VOXELFLAG_NO_DATA;
1688
1689         vm->m_is_dirty = true;
1690 }
1691
1692 s16 ServerMap::findGroundLevel(v2s16 p2d)
1693 {
1694 #if 0
1695         /*
1696                 Uh, just do something random...
1697         */
1698         // Find existing map from top to down
1699         s16 max=63;
1700         s16 min=-64;
1701         v3s16 p(p2d.X, max, p2d.Y);
1702         for(; p.Y>min; p.Y--)
1703         {
1704                 MapNode n = getNodeNoEx(p);
1705                 if(n.getContent() != CONTENT_IGNORE)
1706                         break;
1707         }
1708         if(p.Y == min)
1709                 goto plan_b;
1710         // If this node is not air, go to plan b
1711         if(getNodeNoEx(p).getContent() != CONTENT_AIR)
1712                 goto plan_b;
1713         // Search existing walkable and return it
1714         for(; p.Y>min; p.Y--)
1715         {
1716                 MapNode n = getNodeNoEx(p);
1717                 if(content_walkable(n.d) && n.getContent() != CONTENT_IGNORE)
1718                         return p.Y;
1719         }
1720
1721         // Move to plan b
1722 plan_b:
1723 #endif
1724
1725         /*
1726                 Determine from map generator noise functions
1727         */
1728
1729         s16 level = m_emerge->getGroundLevelAtPoint(p2d);
1730         return level;
1731
1732         //double level = base_rock_level_2d(m_seed, p2d) + AVERAGE_MUD_AMOUNT;
1733         //return (s16)level;
1734 }
1735
1736 bool ServerMap::loadFromFolders() {
1737         if (!dbase->initialized() &&
1738                         !fs::PathExists(m_savedir + DIR_DELIM + "map.sqlite"))
1739                 return true;
1740         return false;
1741 }
1742
1743 void ServerMap::createDirs(std::string path)
1744 {
1745         if (!fs::CreateAllDirs(path)) {
1746                 m_dout<<"ServerMap: Failed to create directory "
1747                                 <<"\""<<path<<"\""<<std::endl;
1748                 throw BaseException("ServerMap failed to create directory");
1749         }
1750 }
1751
1752 std::string ServerMap::getSectorDir(v2s16 pos, int layout)
1753 {
1754         char cc[9];
1755         switch(layout)
1756         {
1757                 case 1:
1758                         snprintf(cc, 9, "%.4x%.4x",
1759                                 (unsigned int) pos.X & 0xffff,
1760                                 (unsigned int) pos.Y & 0xffff);
1761
1762                         return m_savedir + DIR_DELIM + "sectors" + DIR_DELIM + cc;
1763                 case 2:
1764                         snprintf(cc, 9, (std::string("%.3x") + DIR_DELIM + "%.3x").c_str(),
1765                                 (unsigned int) pos.X & 0xfff,
1766                                 (unsigned int) pos.Y & 0xfff);
1767
1768                         return m_savedir + DIR_DELIM + "sectors2" + DIR_DELIM + cc;
1769                 default:
1770                         assert(false);
1771                         return "";
1772         }
1773 }
1774
1775 v2s16 ServerMap::getSectorPos(const std::string &dirname)
1776 {
1777         unsigned int x = 0, y = 0;
1778         int r;
1779         std::string component;
1780         fs::RemoveLastPathComponent(dirname, &component, 1);
1781         if(component.size() == 8)
1782         {
1783                 // Old layout
1784                 r = sscanf(component.c_str(), "%4x%4x", &x, &y);
1785         }
1786         else if(component.size() == 3)
1787         {
1788                 // New layout
1789                 fs::RemoveLastPathComponent(dirname, &component, 2);
1790                 r = sscanf(component.c_str(), (std::string("%3x") + DIR_DELIM + "%3x").c_str(), &x, &y);
1791                 // Sign-extend the 12 bit values up to 16 bits...
1792                 if(x & 0x800) x |= 0xF000;
1793                 if(y & 0x800) y |= 0xF000;
1794         }
1795         else
1796         {
1797                 r = -1;
1798         }
1799
1800         FATAL_ERROR_IF(r != 2, "getSectorPos()");
1801         v2s16 pos((s16)x, (s16)y);
1802         return pos;
1803 }
1804
1805 v3s16 ServerMap::getBlockPos(const std::string &sectordir, const std::string &blockfile)
1806 {
1807         v2s16 p2d = getSectorPos(sectordir);
1808
1809         if(blockfile.size() != 4){
1810                 throw InvalidFilenameException("Invalid block filename");
1811         }
1812         unsigned int y;
1813         int r = sscanf(blockfile.c_str(), "%4x", &y);
1814         if(r != 1)
1815                 throw InvalidFilenameException("Invalid block filename");
1816         return v3s16(p2d.X, y, p2d.Y);
1817 }
1818
1819 std::string ServerMap::getBlockFilename(v3s16 p)
1820 {
1821         char cc[5];
1822         snprintf(cc, 5, "%.4x", (unsigned int)p.Y&0xffff);
1823         return cc;
1824 }
1825
1826 void ServerMap::save(ModifiedState save_level)
1827 {
1828         DSTACK(FUNCTION_NAME);
1829         if (!m_map_saving_enabled) {
1830                 warningstream<<"Not saving map, saving disabled."<<std::endl;
1831                 return;
1832         }
1833
1834         if(save_level == MOD_STATE_CLEAN)
1835                 infostream<<"ServerMap: Saving whole map, this can take time."
1836                                 <<std::endl;
1837
1838         if (m_map_metadata_changed || save_level == MOD_STATE_CLEAN) {
1839                 if (settings_mgr.saveMapMeta())
1840                         m_map_metadata_changed = false;
1841         }
1842
1843         // Profile modified reasons
1844         Profiler modprofiler;
1845
1846         u32 block_count = 0;
1847         u32 block_count_all = 0; // Number of blocks in memory
1848
1849         // Don't do anything with sqlite unless something is really saved
1850         bool save_started = false;
1851
1852         for (auto &sector_it : m_sectors) {
1853                 MapSector *sector = sector_it.second;
1854
1855                 MapBlockVect blocks;
1856                 sector->getBlocks(blocks);
1857
1858                 for (MapBlock *block : blocks) {
1859                         block_count_all++;
1860
1861                         if(block->getModified() >= (u32)save_level) {
1862                                 // Lazy beginSave()
1863                                 if(!save_started) {
1864                                         beginSave();
1865                                         save_started = true;
1866                                 }
1867
1868                                 modprofiler.add(block->getModifiedReasonString(), 1);
1869
1870                                 saveBlock(block);
1871                                 block_count++;
1872                         }
1873                 }
1874         }
1875
1876         if(save_started)
1877                 endSave();
1878
1879         /*
1880                 Only print if something happened or saved whole map
1881         */
1882         if(save_level == MOD_STATE_CLEAN
1883                         || block_count != 0) {
1884                 infostream<<"ServerMap: Written: "
1885                                 <<block_count<<" block files"
1886                                 <<", "<<block_count_all<<" blocks in memory."
1887                                 <<std::endl;
1888                 PrintInfo(infostream); // ServerMap/ClientMap:
1889                 infostream<<"Blocks modified by: "<<std::endl;
1890                 modprofiler.print(infostream);
1891         }
1892 }
1893
1894 void ServerMap::listAllLoadableBlocks(std::vector<v3s16> &dst)
1895 {
1896         if (loadFromFolders()) {
1897                 errorstream << "Map::listAllLoadableBlocks(): Result will be missing "
1898                                 << "all blocks that are stored in flat files." << std::endl;
1899         }
1900         dbase->listAllLoadableBlocks(dst);
1901 }
1902
1903 void ServerMap::listAllLoadedBlocks(std::vector<v3s16> &dst)
1904 {
1905         for (auto &sector_it : m_sectors) {
1906                 MapSector *sector = sector_it.second;
1907
1908                 MapBlockVect blocks;
1909                 sector->getBlocks(blocks);
1910
1911                 for (MapBlock *block : blocks) {
1912                         v3s16 p = block->getPos();
1913                         dst.push_back(p);
1914                 }
1915         }
1916 }
1917
1918 MapDatabase *ServerMap::createDatabase(
1919         const std::string &name,
1920         const std::string &savedir,
1921         Settings &conf)
1922 {
1923         if (name == "sqlite3")
1924                 return new MapDatabaseSQLite3(savedir);
1925         if (name == "dummy")
1926                 return new Database_Dummy();
1927         #if USE_LEVELDB
1928         if (name == "leveldb")
1929                 return new Database_LevelDB(savedir);
1930         #endif
1931         #if USE_REDIS
1932         if (name == "redis")
1933                 return new Database_Redis(conf);
1934         #endif
1935         #if USE_POSTGRESQL
1936         if (name == "postgresql") {
1937                 std::string connect_string;
1938                 conf.getNoEx("pgsql_connection", connect_string);
1939                 return new MapDatabasePostgreSQL(connect_string);
1940         }
1941         #endif
1942
1943         throw BaseException(std::string("Database backend ") + name + " not supported.");
1944 }
1945
1946 void ServerMap::beginSave()
1947 {
1948         dbase->beginSave();
1949 }
1950
1951 void ServerMap::endSave()
1952 {
1953         dbase->endSave();
1954 }
1955
1956 bool ServerMap::saveBlock(MapBlock *block)
1957 {
1958         return saveBlock(block, dbase);
1959 }
1960
1961 bool ServerMap::saveBlock(MapBlock *block, MapDatabase *db)
1962 {
1963         v3s16 p3d = block->getPos();
1964
1965         // Dummy blocks are not written
1966         if (block->isDummy()) {
1967                 warningstream << "saveBlock: Not writing dummy block "
1968                         << PP(p3d) << std::endl;
1969                 return true;
1970         }
1971
1972         // Format used for writing
1973         u8 version = SER_FMT_VER_HIGHEST_WRITE;
1974
1975         /*
1976                 [0] u8 serialization version
1977                 [1] data
1978         */
1979         std::ostringstream o(std::ios_base::binary);
1980         o.write((char*) &version, 1);
1981         block->serialize(o, version, true);
1982
1983         bool ret = db->saveBlock(p3d, o.str());
1984         if (ret) {
1985                 // We just wrote it to the disk so clear modified flag
1986                 block->resetModified();
1987         }
1988         return ret;
1989 }
1990
1991 void ServerMap::loadBlock(const std::string &sectordir, const std::string &blockfile,
1992                 MapSector *sector, bool save_after_load)
1993 {
1994         DSTACK(FUNCTION_NAME);
1995
1996         std::string fullpath = sectordir + DIR_DELIM + blockfile;
1997         try {
1998                 std::ifstream is(fullpath.c_str(), std::ios_base::binary);
1999                 if (!is.good())
2000                         throw FileNotGoodException("Cannot open block file");
2001
2002                 v3s16 p3d = getBlockPos(sectordir, blockfile);
2003                 v2s16 p2d(p3d.X, p3d.Z);
2004
2005                 assert(sector->getPos() == p2d);
2006
2007                 u8 version = SER_FMT_VER_INVALID;
2008                 is.read((char*)&version, 1);
2009
2010                 if(is.fail())
2011                         throw SerializationError("ServerMap::loadBlock(): Failed"
2012                                         " to read MapBlock version");
2013
2014                 /*u32 block_size = MapBlock::serializedLength(version);
2015                 SharedBuffer<u8> data(block_size);
2016                 is.read((char*)*data, block_size);*/
2017
2018                 // This will always return a sector because we're the server
2019                 //MapSector *sector = emergeSector(p2d);
2020
2021                 MapBlock *block = NULL;
2022                 bool created_new = false;
2023                 block = sector->getBlockNoCreateNoEx(p3d.Y);
2024                 if(block == NULL)
2025                 {
2026                         block = sector->createBlankBlockNoInsert(p3d.Y);
2027                         created_new = true;
2028                 }
2029
2030                 // Read basic data
2031                 block->deSerialize(is, version, true);
2032
2033                 // If it's a new block, insert it to the map
2034                 if (created_new) {
2035                         sector->insertBlock(block);
2036                         ReflowScan scanner(this, m_emerge->ndef);
2037                         scanner.scan(block, &m_transforming_liquid);
2038                 }
2039
2040                 /*
2041                         Save blocks loaded in old format in new format
2042                 */
2043
2044                 if(version < SER_FMT_VER_HIGHEST_WRITE || save_after_load)
2045                 {
2046                         saveBlock(block);
2047
2048                         // Should be in database now, so delete the old file
2049                         fs::RecursiveDelete(fullpath);
2050                 }
2051
2052                 // We just loaded it from the disk, so it's up-to-date.
2053                 block->resetModified();
2054
2055         }
2056         catch(SerializationError &e)
2057         {
2058                 warningstream<<"Invalid block data on disk "
2059                                 <<"fullpath="<<fullpath
2060                                 <<" (SerializationError). "
2061                                 <<"what()="<<e.what()
2062                                 <<std::endl;
2063                                 // Ignoring. A new one will be generated.
2064                 abort();
2065
2066                 // TODO: Backup file; name is in fullpath.
2067         }
2068 }
2069
2070 void ServerMap::loadBlock(std::string *blob, v3s16 p3d, MapSector *sector, bool save_after_load)
2071 {
2072         DSTACK(FUNCTION_NAME);
2073
2074         try {
2075                 std::istringstream is(*blob, std::ios_base::binary);
2076
2077                 u8 version = SER_FMT_VER_INVALID;
2078                 is.read((char*)&version, 1);
2079
2080                 if(is.fail())
2081                         throw SerializationError("ServerMap::loadBlock(): Failed"
2082                                         " to read MapBlock version");
2083
2084                 MapBlock *block = NULL;
2085                 bool created_new = false;
2086                 block = sector->getBlockNoCreateNoEx(p3d.Y);
2087                 if(block == NULL)
2088                 {
2089                         block = sector->createBlankBlockNoInsert(p3d.Y);
2090                         created_new = true;
2091                 }
2092
2093                 // Read basic data
2094                 block->deSerialize(is, version, true);
2095
2096                 // If it's a new block, insert it to the map
2097                 if (created_new) {
2098                         sector->insertBlock(block);
2099                         ReflowScan scanner(this, m_emerge->ndef);
2100                         scanner.scan(block, &m_transforming_liquid);
2101                 }
2102
2103                 /*
2104                         Save blocks loaded in old format in new format
2105                 */
2106
2107                 //if(version < SER_FMT_VER_HIGHEST_READ || save_after_load)
2108                 // Only save if asked to; no need to update version
2109                 if(save_after_load)
2110                         saveBlock(block);
2111
2112                 // We just loaded it from, so it's up-to-date.
2113                 block->resetModified();
2114         }
2115         catch(SerializationError &e)
2116         {
2117                 errorstream<<"Invalid block data in database"
2118                                 <<" ("<<p3d.X<<","<<p3d.Y<<","<<p3d.Z<<")"
2119                                 <<" (SerializationError): "<<e.what()<<std::endl;
2120
2121                 // TODO: Block should be marked as invalid in memory so that it is
2122                 // not touched but the game can run
2123
2124                 if(g_settings->getBool("ignore_world_load_errors")){
2125                         errorstream<<"Ignoring block load error. Duck and cover! "
2126                                         <<"(ignore_world_load_errors)"<<std::endl;
2127                 } else {
2128                         throw SerializationError("Invalid block data in database");
2129                 }
2130         }
2131 }
2132
2133 MapBlock* ServerMap::loadBlock(v3s16 blockpos)
2134 {
2135         DSTACK(FUNCTION_NAME);
2136
2137         bool created_new = (getBlockNoCreateNoEx(blockpos) == NULL);
2138
2139         v2s16 p2d(blockpos.X, blockpos.Z);
2140
2141         std::string ret;
2142         dbase->loadBlock(blockpos, &ret);
2143         if (!ret.empty()) {
2144                 loadBlock(&ret, blockpos, createSector(p2d), false);
2145         } else {
2146                 // Not found in database, try the files
2147
2148                 // The directory layout we're going to load from.
2149                 //  1 - original sectors/xxxxzzzz/
2150                 //  2 - new sectors2/xxx/zzz/
2151                 //  If we load from anything but the latest structure, we will
2152                 //  immediately save to the new one, and remove the old.
2153                 std::string sectordir1 = getSectorDir(p2d, 1);
2154                 std::string sectordir;
2155                 if (fs::PathExists(sectordir1)) {
2156                         sectordir = sectordir1;
2157                 } else {
2158                         sectordir = getSectorDir(p2d, 2);
2159                 }
2160
2161                 /*
2162                 Make sure sector is loaded
2163                  */
2164
2165                 MapSector *sector = getSectorNoGenerateNoEx(p2d);
2166
2167                 /*
2168                 Make sure file exists
2169                  */
2170
2171                 std::string blockfilename = getBlockFilename(blockpos);
2172                 if (!fs::PathExists(sectordir + DIR_DELIM + blockfilename))
2173                         return NULL;
2174
2175                 /*
2176                 Load block and save it to the database
2177                  */
2178                 loadBlock(sectordir, blockfilename, sector, true);
2179         }
2180
2181         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2182         if (created_new && (block != NULL)) {
2183                 std::map<v3s16, MapBlock*> modified_blocks;
2184                 // Fix lighting if necessary
2185                 voxalgo::update_block_border_lighting(this, block, modified_blocks);
2186                 if (!modified_blocks.empty()) {
2187                         //Modified lighting, send event
2188                         MapEditEvent event;
2189                         event.type = MEET_OTHER;
2190                         std::map<v3s16, MapBlock *>::iterator it;
2191                         for (it = modified_blocks.begin();
2192                                         it != modified_blocks.end(); ++it)
2193                                 event.modified_blocks.insert(it->first);
2194                         dispatchEvent(&event);
2195                 }
2196         }
2197         return block;
2198 }
2199
2200 bool ServerMap::deleteBlock(v3s16 blockpos)
2201 {
2202         if (!dbase->deleteBlock(blockpos))
2203                 return false;
2204
2205         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2206         if (block) {
2207                 v2s16 p2d(blockpos.X, blockpos.Z);
2208                 MapSector *sector = getSectorNoGenerateNoEx(p2d);
2209                 if (!sector)
2210                         return false;
2211                 sector->deleteBlock(block);
2212         }
2213
2214         return true;
2215 }
2216
2217 void ServerMap::PrintInfo(std::ostream &out)
2218 {
2219         out<<"ServerMap: ";
2220 }
2221
2222 bool ServerMap::repairBlockLight(v3s16 blockpos,
2223         std::map<v3s16, MapBlock *> *modified_blocks)
2224 {
2225         MapBlock *block = emergeBlock(blockpos, false);
2226         if (!block || !block->isGenerated())
2227                 return false;
2228         voxalgo::repair_block_light(this, block, modified_blocks);
2229         return true;
2230 }
2231
2232 MMVManip::MMVManip(Map *map):
2233                 VoxelManipulator(),
2234                 m_map(map)
2235 {
2236 }
2237
2238 void MMVManip::initialEmerge(v3s16 blockpos_min, v3s16 blockpos_max,
2239         bool load_if_inexistent)
2240 {
2241         TimeTaker timer1("initialEmerge", &emerge_time);
2242
2243         // Units of these are MapBlocks
2244         v3s16 p_min = blockpos_min;
2245         v3s16 p_max = blockpos_max;
2246
2247         VoxelArea block_area_nodes
2248                         (p_min*MAP_BLOCKSIZE, (p_max+1)*MAP_BLOCKSIZE-v3s16(1,1,1));
2249
2250         u32 size_MB = block_area_nodes.getVolume()*4/1000000;
2251         if(size_MB >= 1)
2252         {
2253                 infostream<<"initialEmerge: area: ";
2254                 block_area_nodes.print(infostream);
2255                 infostream<<" ("<<size_MB<<"MB)";
2256                 infostream<<std::endl;
2257         }
2258
2259         addArea(block_area_nodes);
2260
2261         for(s32 z=p_min.Z; z<=p_max.Z; z++)
2262         for(s32 y=p_min.Y; y<=p_max.Y; y++)
2263         for(s32 x=p_min.X; x<=p_max.X; x++)
2264         {
2265                 u8 flags = 0;
2266                 MapBlock *block;
2267                 v3s16 p(x,y,z);
2268                 std::map<v3s16, u8>::iterator n;
2269                 n = m_loaded_blocks.find(p);
2270                 if(n != m_loaded_blocks.end())
2271                         continue;
2272
2273                 bool block_data_inexistent = false;
2274                 try
2275                 {
2276                         TimeTaker timer1("emerge load", &emerge_load_time);
2277
2278                         block = m_map->getBlockNoCreate(p);
2279                         if(block->isDummy())
2280                                 block_data_inexistent = true;
2281                         else
2282                                 block->copyTo(*this);
2283                 }
2284                 catch(InvalidPositionException &e)
2285                 {
2286                         block_data_inexistent = true;
2287                 }
2288
2289                 if(block_data_inexistent)
2290                 {
2291
2292                         if (load_if_inexistent && !blockpos_over_max_limit(p)) {
2293                                 ServerMap *svrmap = (ServerMap *)m_map;
2294                                 block = svrmap->emergeBlock(p, false);
2295                                 if (block == NULL)
2296                                         block = svrmap->createBlock(p);
2297                                 block->copyTo(*this);
2298                         } else {
2299                                 flags |= VMANIP_BLOCK_DATA_INEXIST;
2300
2301                                 /*
2302                                         Mark area inexistent
2303                                 */
2304                                 VoxelArea a(p*MAP_BLOCKSIZE, (p+1)*MAP_BLOCKSIZE-v3s16(1,1,1));
2305                                 // Fill with VOXELFLAG_NO_DATA
2306                                 for(s32 z=a.MinEdge.Z; z<=a.MaxEdge.Z; z++)
2307                                 for(s32 y=a.MinEdge.Y; y<=a.MaxEdge.Y; y++)
2308                                 {
2309                                         s32 i = m_area.index(a.MinEdge.X,y,z);
2310                                         memset(&m_flags[i], VOXELFLAG_NO_DATA, MAP_BLOCKSIZE);
2311                                 }
2312                         }
2313                 }
2314                 /*else if (block->getNode(0, 0, 0).getContent() == CONTENT_IGNORE)
2315                 {
2316                         // Mark that block was loaded as blank
2317                         flags |= VMANIP_BLOCK_CONTAINS_CIGNORE;
2318                 }*/
2319
2320                 m_loaded_blocks[p] = flags;
2321         }
2322
2323         m_is_dirty = false;
2324 }
2325
2326 void MMVManip::blitBackAll(std::map<v3s16, MapBlock*> *modified_blocks,
2327         bool overwrite_generated)
2328 {
2329         if(m_area.getExtent() == v3s16(0,0,0))
2330                 return;
2331
2332         /*
2333                 Copy data of all blocks
2334         */
2335         for (auto &loaded_block : m_loaded_blocks) {
2336                 v3s16 p = loaded_block.first;
2337                 MapBlock *block = m_map->getBlockNoCreateNoEx(p);
2338                 bool existed = !(loaded_block.second & VMANIP_BLOCK_DATA_INEXIST);
2339                 if (!existed || (block == NULL) ||
2340                         (!overwrite_generated && block->isGenerated()))
2341                         continue;
2342
2343                 block->copyFrom(*this);
2344
2345                 if(modified_blocks)
2346                         (*modified_blocks)[p] = block;
2347         }
2348 }
2349
2350 //END