src/database-sqlite3.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 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 /*
  21 SQLite format specification:
  22         blocks:
  23                 (PK) INT id
  24                 BLOB data
  25 */
  26
  27
  28 #include "database-sqlite3.h"
  29
  30 #include "log.h"
  31 #include "filesys.h"
  32 #include "exceptions.h"
  33 #include "settings.h"
  34 #include "porting.h"
  35 #include "util/string.h"
  36 #include "content_sao.h"
  37 #include "remoteplayer.h"
  38
  39 #include <cassert>
  40
  41 // When to print messages when the database is being held locked by another process
  42 // Note: I've seen occasional delays of over 250ms while running minetestmapper.
  43 #define BUSY_INFO_TRESHOLD      100     // Print first informational message after 100ms.
  44 #define BUSY_WARNING_TRESHOLD   250     // Print warning message after 250ms. Lag is increased.
  45 #define BUSY_ERROR_TRESHOLD     1000    // Print error message after 1000ms. Significant lag.
  46 #define BUSY_FATAL_TRESHOLD     3000    // Allow SQLITE_BUSY to be returned, which will cause a minetest crash.
  47 #define BUSY_ERROR_INTERVAL     10000   // Safety net: report again every 10 seconds
  48
  49
  50 #define SQLRES(s, r, m) \
  51         if ((s) != (r)) { \
  52                 throw DatabaseException(std::string(m) + ": " +\
  53                                 sqlite3_errmsg(m_database)); \
  54         }
  55 #define SQLOK(s, m) SQLRES(s, SQLITE_OK, m)
  56
  57 #define PREPARE_STATEMENT(name, query) \
  58         SQLOK(sqlite3_prepare_v2(m_database, query, -1, &m_stmt_##name, NULL),\
  59                 "Failed to prepare query '" query "'")
  60
  61 #define SQLOK_ERRSTREAM(s, m)                           \
  62         if ((s) != SQLITE_OK) {                             \
  63                 errorstream << (m) << ": "                      \
  64                         << sqlite3_errmsg(m_database) << std::endl; \
  65         }
  66
  67 #define FINALIZE_STATEMENT(statement) SQLOK_ERRSTREAM(sqlite3_finalize(statement), \
  68         "Failed to finalize " #statement)
  69
  70 int Database_SQLite3::busyHandler(void *data, int count)
  71 {
  72         s64 &first_time = reinterpret_cast<s64 *>(data)[0];
  73         s64 &prev_time = reinterpret_cast<s64 *>(data)[1];
  74         s64 cur_time = porting::getTimeMs();
  75
  76         if (count == 0) {
  77                 first_time = cur_time;
  78                 prev_time = first_time;
  79         } else {
  80                 while (cur_time < prev_time)
  81                         cur_time += s64(1)<<32;
  82         }
  83
  84         if (cur_time - first_time < BUSY_INFO_TRESHOLD) {
  85                 ; // do nothing
  86         } else if (cur_time - first_time >= BUSY_INFO_TRESHOLD &&
  87                         prev_time - first_time < BUSY_INFO_TRESHOLD) {
  88                 infostream << "SQLite3 database has been locked for "
  89                         << cur_time - first_time << " ms." << std::endl;
  90         } else if (cur_time - first_time >= BUSY_WARNING_TRESHOLD &&
  91                         prev_time - first_time < BUSY_WARNING_TRESHOLD) {
  92                 warningstream << "SQLite3 database has been locked for "
  93                         << cur_time - first_time << " ms." << std::endl;
  94         } else if (cur_time - first_time >= BUSY_ERROR_TRESHOLD &&
  95                         prev_time - first_time < BUSY_ERROR_TRESHOLD) {
  96                 errorstream << "SQLite3 database has been locked for "
  97                         << cur_time - first_time << " ms; this causes lag." << std::endl;
  98         } else if (cur_time - first_time >= BUSY_FATAL_TRESHOLD &&
  99                         prev_time - first_time < BUSY_FATAL_TRESHOLD) {
 100                 errorstream << "SQLite3 database has been locked for "
 101                         << cur_time - first_time << " ms - giving up!" << std::endl;
 102         } else if ((cur_time - first_time) / BUSY_ERROR_INTERVAL !=
 103                         (prev_time - first_time) / BUSY_ERROR_INTERVAL) {
 104                 // Safety net: keep reporting every BUSY_ERROR_INTERVAL
 105                 errorstream << "SQLite3 database has been locked for "
 106                         << (cur_time - first_time) / 1000 << " seconds!" << std::endl;
 107         }
 108
 109         prev_time = cur_time;
 110
 111         // Make sqlite transaction fail if delay exceeds BUSY_FATAL_TRESHOLD
 112         return cur_time - first_time < BUSY_FATAL_TRESHOLD;
 113 }
 114
 115
 116 Database_SQLite3::Database_SQLite3(const std::string &savedir, const std::string &dbname) :
 117         m_savedir(savedir),
 118         m_dbname(dbname)
 119 {
 120 }
 121
 122 void Database_SQLite3::beginSave()
 123 {
 124         verifyDatabase();
 125         SQLRES(sqlite3_step(m_stmt_begin), SQLITE_DONE,
 126                 "Failed to start SQLite3 transaction");
 127         sqlite3_reset(m_stmt_begin);
 128 }
 129
 130 void Database_SQLite3::endSave()
 131 {
 132         verifyDatabase();
 133         SQLRES(sqlite3_step(m_stmt_end), SQLITE_DONE,
 134                 "Failed to commit SQLite3 transaction");
 135         sqlite3_reset(m_stmt_end);
 136 }
 137
 138 void Database_SQLite3::openDatabase()
 139 {
 140         if (m_database) return;
 141
 142         std::string dbp = m_savedir + DIR_DELIM + m_dbname + ".sqlite";
 143
 144         // Open the database connection
 145
 146         if (!fs::CreateAllDirs(m_savedir)) {
 147                 infostream << "Database_SQLite3: Failed to create directory \""
 148                         << m_savedir << "\"" << std::endl;
 149                 throw FileNotGoodException("Failed to create database "
 150                                 "save directory");
 151         }
 152
 153         bool needs_create = !fs::PathExists(dbp);
 154
 155         SQLOK(sqlite3_open_v2(dbp.c_str(), &m_database,
 156                         SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL),
 157                 std::string("Failed to open SQLite3 database file ") + dbp);
 158
 159         SQLOK(sqlite3_busy_handler(m_database, Database_SQLite3::busyHandler,
 160                 m_busy_handler_data), "Failed to set SQLite3 busy handler");
 161
 162         if (needs_create) {
 163                 createDatabase();
 164         }
 165
 166         std::string query_str = std::string("PRAGMA synchronous = ")
 167                          + itos(g_settings->getU16("sqlite_synchronous"));
 168         SQLOK(sqlite3_exec(m_database, query_str.c_str(), NULL, NULL, NULL),
 169                 "Failed to modify sqlite3 synchronous mode");
 170         SQLOK(sqlite3_exec(m_database, "PRAGMA foreign_keys = ON", NULL, NULL, NULL),
 171                 "Failed to enable sqlite3 foreign key support");
 172 }
 173
 174 void Database_SQLite3::verifyDatabase()
 175 {
 176         if (m_initialized) return;
 177
 178         openDatabase();
 179
 180         PREPARE_STATEMENT(begin, "BEGIN;");
 181         PREPARE_STATEMENT(end, "COMMIT;");
 182
 183         initStatements();
 184
 185         m_initialized = true;
 186 }
 187
 188 Database_SQLite3::~Database_SQLite3()
 189 {
 190         FINALIZE_STATEMENT(m_stmt_begin)
 191         FINALIZE_STATEMENT(m_stmt_end)
 192
 193         SQLOK_ERRSTREAM(sqlite3_close(m_database), "Failed to close database");
 194 }
 195
 196 /*
 197  * Map database
 198  */
 199
 200 MapDatabaseSQLite3::MapDatabaseSQLite3(const std::string &savedir):
 201         Database_SQLite3(savedir, "map"),
 202         MapDatabase()
 203 {
 204 }
 205
 206 MapDatabaseSQLite3::~MapDatabaseSQLite3()
 207 {
 208         FINALIZE_STATEMENT(m_stmt_read)
 209         FINALIZE_STATEMENT(m_stmt_write)
 210         FINALIZE_STATEMENT(m_stmt_list)
 211         FINALIZE_STATEMENT(m_stmt_delete)
 212 }
 213
 214
 215 void MapDatabaseSQLite3::createDatabase()
 216 {
 217         assert(m_database); // Pre-condition
 218
 219         SQLOK(sqlite3_exec(m_database,
 220                 "CREATE TABLE IF NOT EXISTS `blocks` (\n"
 221                         "       `pos` INT PRIMARY KEY,\n"
 222                         "       `data` BLOB\n"
 223                         ");\n",
 224                 NULL, NULL, NULL),
 225                 "Failed to create database table");
 226 }
 227
 228 void MapDatabaseSQLite3::initStatements()
 229 {
 230         PREPARE_STATEMENT(read, "SELECT `data` FROM `blocks` WHERE `pos` = ? LIMIT 1");
 231 #ifdef __ANDROID__
 232         PREPARE_STATEMENT(write,  "INSERT INTO `blocks` (`pos`, `data`) VALUES (?, ?)");
 233 #else
 234         PREPARE_STATEMENT(write, "REPLACE INTO `blocks` (`pos`, `data`) VALUES (?, ?)");
 235 #endif
 236         PREPARE_STATEMENT(delete, "DELETE FROM `blocks` WHERE `pos` = ?");
 237         PREPARE_STATEMENT(list, "SELECT `pos` FROM `blocks`");
 238
 239         verbosestream << "ServerMap: SQLite3 database opened." << std::endl;
 240 }
 241
 242 inline void MapDatabaseSQLite3::bindPos(sqlite3_stmt *stmt, const v3s16 &pos, int index)
 243 {
 244         SQLOK(sqlite3_bind_int64(stmt, index, getBlockAsInteger(pos)),
 245                 "Internal error: failed to bind query at " __FILE__ ":" TOSTRING(__LINE__));
 246 }
 247
 248 bool MapDatabaseSQLite3::deleteBlock(const v3s16 &pos)
 249 {
 250         verifyDatabase();
 251
 252         bindPos(m_stmt_delete, pos);
 253
 254         bool good = sqlite3_step(m_stmt_delete) == SQLITE_DONE;
 255         sqlite3_reset(m_stmt_delete);
 256
 257         if (!good) {
 258                 warningstream << "deleteBlock: Block failed to delete "
 259                         << PP(pos) << ": " << sqlite3_errmsg(m_database) << std::endl;
 260         }
 261         return good;
 262 }
 263
 264 bool MapDatabaseSQLite3::saveBlock(const v3s16 &pos, const std::string &data)
 265 {
 266         verifyDatabase();
 267
 268 #ifdef __ANDROID__
 269         /**
 270          * Note: For some unknown reason SQLite3 fails to REPLACE blocks on Android,
 271          * deleting them and then inserting works.
 272          */
 273         bindPos(m_stmt_read, pos);
 274
 275         if (sqlite3_step(m_stmt_read) == SQLITE_ROW) {
 276                 deleteBlock(pos);
 277         }
 278         sqlite3_reset(m_stmt_read);
 279 #endif
 280
 281         bindPos(m_stmt_write, pos);
 282         SQLOK(sqlite3_bind_blob(m_stmt_write, 2, data.data(), data.size(), NULL),
 283                 "Internal error: failed to bind query at " __FILE__ ":" TOSTRING(__LINE__));
 284
 285         SQLRES(sqlite3_step(m_stmt_write), SQLITE_DONE, "Failed to save block")
 286         sqlite3_reset(m_stmt_write);
 287
 288         return true;
 289 }
 290
 291 void MapDatabaseSQLite3::loadBlock(const v3s16 &pos, std::string *block)
 292 {
 293         verifyDatabase();
 294
 295         bindPos(m_stmt_read, pos);
 296
 297         if (sqlite3_step(m_stmt_read) != SQLITE_ROW) {
 298                 sqlite3_reset(m_stmt_read);
 299                 return;
 300         }
 301
 302         const char *data = (const char *) sqlite3_column_blob(m_stmt_read, 0);
 303         size_t len = sqlite3_column_bytes(m_stmt_read, 0);
 304
 305         *block = (data) ? std::string(data, len) : "";
 306
 307         sqlite3_step(m_stmt_read);
 308         // We should never get more than 1 row, so ok to reset
 309         sqlite3_reset(m_stmt_read);
 310 }
 311
 312 void MapDatabaseSQLite3::listAllLoadableBlocks(std::vector<v3s16> &dst)
 313 {
 314         verifyDatabase();
 315
 316         while (sqlite3_step(m_stmt_list) == SQLITE_ROW)
 317                 dst.push_back(getIntegerAsBlock(sqlite3_column_int64(m_stmt_list, 0)));
 318
 319         sqlite3_reset(m_stmt_list);
 320 }
 321
 322 /*
 323  * Player Database
 324  */
 325
 326 PlayerDatabaseSQLite3::PlayerDatabaseSQLite3(const std::string &savedir):
 327         Database_SQLite3(savedir, "players"),
 328         PlayerDatabase()
 329 {
 330 }
 331
 332 PlayerDatabaseSQLite3::~PlayerDatabaseSQLite3()
 333 {
 334         FINALIZE_STATEMENT(m_stmt_player_load)
 335         FINALIZE_STATEMENT(m_stmt_player_add)
 336         FINALIZE_STATEMENT(m_stmt_player_update)
 337         FINALIZE_STATEMENT(m_stmt_player_remove)
 338         FINALIZE_STATEMENT(m_stmt_player_list)
 339         FINALIZE_STATEMENT(m_stmt_player_add_inventory)
 340         FINALIZE_STATEMENT(m_stmt_player_add_inventory_items)
 341         FINALIZE_STATEMENT(m_stmt_player_remove_inventory)
 342         FINALIZE_STATEMENT(m_stmt_player_remove_inventory_items)
 343         FINALIZE_STATEMENT(m_stmt_player_load_inventory)
 344         FINALIZE_STATEMENT(m_stmt_player_load_inventory_items)
 345         FINALIZE_STATEMENT(m_stmt_player_metadata_load)
 346         FINALIZE_STATEMENT(m_stmt_player_metadata_add)
 347         FINALIZE_STATEMENT(m_stmt_player_metadata_remove)
 348 };
 349
 350
 351 void PlayerDatabaseSQLite3::createDatabase()
 352 {
 353         assert(m_database); // Pre-condition
 354
 355         SQLOK(sqlite3_exec(m_database,
 356                 "CREATE TABLE IF NOT EXISTS `player` ("
 357                         "`name` VARCHAR(50) NOT NULL,"
 358                         "`pitch` NUMERIC(11, 4) NOT NULL,"
 359                         "`yaw` NUMERIC(11, 4) NOT NULL,"
 360                         "`posX` NUMERIC(11, 4) NOT NULL,"
 361                         "`posY` NUMERIC(11, 4) NOT NULL,"
 362                         "`posZ` NUMERIC(11, 4) NOT NULL,"
 363                         "`hp` INT NOT NULL,"
 364                         "`breath` INT NOT NULL,"
 365                         "`creation_date` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,"
 366                         "`modification_date` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,"
 367                         "PRIMARY KEY (`name`));",
 368                 NULL, NULL, NULL),
 369                 "Failed to create player table");
 370
 371         SQLOK(sqlite3_exec(m_database,
 372                 "CREATE TABLE IF NOT EXISTS `player_metadata` ("
 373                         "    `player` VARCHAR(50) NOT NULL,"
 374                         "    `metadata` VARCHAR(256) NOT NULL,"
 375                         "    `value` TEXT,"
 376                         "    PRIMARY KEY(`player`, `metadata`),"
 377                         "    FOREIGN KEY (`player`) REFERENCES player (`name`) ON DELETE CASCADE );",
 378                 NULL, NULL, NULL),
 379                 "Failed to create player metadata table");
 380
 381         SQLOK(sqlite3_exec(m_database,
 382                 "CREATE TABLE IF NOT EXISTS `player_inventories` ("
 383                         "   `player` VARCHAR(50) NOT NULL,"
 384                         "       `inv_id` INT NOT NULL,"
 385                         "       `inv_width` INT NOT NULL,"
 386                         "       `inv_name` TEXT NOT NULL DEFAULT '',"
 387                         "       `inv_size` INT NOT NULL,"
 388                         "       PRIMARY KEY(player, inv_id),"
 389                         "   FOREIGN KEY (`player`) REFERENCES player (`name`) ON DELETE CASCADE );",
 390                 NULL, NULL, NULL),
 391                 "Failed to create player inventory table");
 392
 393         SQLOK(sqlite3_exec(m_database,
 394                 "CREATE TABLE `player_inventory_items` ("
 395                         "   `player` VARCHAR(50) NOT NULL,"
 396                         "       `inv_id` INT NOT NULL,"
 397                         "       `slot_id` INT NOT NULL,"
 398                         "       `item` TEXT NOT NULL DEFAULT '',"
 399                         "       PRIMARY KEY(player, inv_id, slot_id),"
 400                         "   FOREIGN KEY (`player`) REFERENCES player (`name`) ON DELETE CASCADE );",
 401                 NULL, NULL, NULL),
 402                 "Failed to create player inventory items table");
 403 }
 404
 405 void PlayerDatabaseSQLite3::initStatements()
 406 {
 407         PREPARE_STATEMENT(player_load, "SELECT `pitch`, `yaw`, `posX`, `posY`, `posZ`, `hp`, "
 408                 "`breath`"
 409                 "FROM `player` WHERE `name` = ?")
 410         PREPARE_STATEMENT(player_add, "INSERT INTO `player` (`name`, `pitch`, `yaw`, `posX`, "
 411                 "`posY`, `posZ`, `hp`, `breath`) VALUES (?, ?, ?, ?, ?, ?, ?, ?)")
 412         PREPARE_STATEMENT(player_update, "UPDATE `player` SET `pitch` = ?, `yaw` = ?, "
 413                         "`posX` = ?, `posY` = ?, `posZ` = ?, `hp` = ?, `breath` = ?, "
 414                         "`modification_date` = CURRENT_TIMESTAMP WHERE `name` = ?")
 415         PREPARE_STATEMENT(player_remove, "DELETE FROM `player` WHERE `name` = ?")
 416         PREPARE_STATEMENT(player_list, "SELECT `name` FROM `player`")
 417
 418         PREPARE_STATEMENT(player_add_inventory, "INSERT INTO `player_inventories` "
 419                 "(`player`, `inv_id`, `inv_width`, `inv_name`, `inv_size`) VALUES (?, ?, ?, ?, ?)")
 420         PREPARE_STATEMENT(player_add_inventory_items, "INSERT INTO `player_inventory_items` "
 421                 "(`player`, `inv_id`, `slot_id`, `item`) VALUES (?, ?, ?, ?)")
 422         PREPARE_STATEMENT(player_remove_inventory, "DELETE FROM `player_inventories` "
 423                 "WHERE `player` = ?")
 424         PREPARE_STATEMENT(player_remove_inventory_items, "DELETE FROM `player_inventory_items` "
 425                 "WHERE `player` = ?")
 426         PREPARE_STATEMENT(player_load_inventory, "SELECT `inv_id`, `inv_width`, `inv_name`, "
 427                 "`inv_size` FROM `player_inventories` WHERE `player` = ? ORDER BY inv_id")
 428         PREPARE_STATEMENT(player_load_inventory_items, "SELECT `slot_id`, `item` "
 429                 "FROM `player_inventory_items` WHERE `player` = ? AND `inv_id` = ?")
 430
 431         PREPARE_STATEMENT(player_metadata_load, "SELECT `metadata`, `value` FROM "
 432                 "`player_metadata` WHERE `player` = ?")
 433         PREPARE_STATEMENT(player_metadata_add, "INSERT INTO `player_metadata` "
 434                 "(`player`, `metadata`, `value`) VALUES (?, ?, ?)")
 435         PREPARE_STATEMENT(player_metadata_remove, "DELETE FROM `player_metadata` "
 436                 "WHERE `player` = ?")
 437         verbosestream << "ServerEnvironment: SQLite3 database opened (players)." << std::endl;
 438 }
 439
 440 bool PlayerDatabaseSQLite3::playerDataExists(const std::string &name)
 441 {
 442         verifyDatabase();
 443         str_to_sqlite(m_stmt_player_load, 1, name);
 444         bool res = (sqlite3_step(m_stmt_player_load) == SQLITE_ROW);
 445         sqlite3_reset(m_stmt_player_load);
 446         return res;
 447 }
 448
 449 void PlayerDatabaseSQLite3::savePlayer(RemotePlayer *player)
 450 {
 451         PlayerSAO* sao = player->getPlayerSAO();
 452         sanity_check(sao);
 453
 454         const v3f &pos = sao->getBasePosition();
 455         // Begin save in brace is mandatory
 456         if (!playerDataExists(player->getName())) {
 457                 beginSave();
 458                 str_to_sqlite(m_stmt_player_add, 1, player->getName());
 459                 double_to_sqlite(m_stmt_player_add, 2, sao->getPitch());
 460                 double_to_sqlite(m_stmt_player_add, 3, sao->getYaw());
 461                 double_to_sqlite(m_stmt_player_add, 4, pos.X);
 462                 double_to_sqlite(m_stmt_player_add, 5, pos.Y);
 463                 double_to_sqlite(m_stmt_player_add, 6, pos.Z);
 464                 int64_to_sqlite(m_stmt_player_add, 7, sao->getHP());
 465                 int64_to_sqlite(m_stmt_player_add, 8, sao->getBreath());
 466
 467                 sqlite3_vrfy(sqlite3_step(m_stmt_player_add), SQLITE_DONE);
 468                 sqlite3_reset(m_stmt_player_add);
 469         } else {
 470                 beginSave();
 471                 double_to_sqlite(m_stmt_player_update, 1, sao->getPitch());
 472                 double_to_sqlite(m_stmt_player_update, 2, sao->getYaw());
 473                 double_to_sqlite(m_stmt_player_update, 3, pos.X);
 474                 double_to_sqlite(m_stmt_player_update, 4, pos.Y);
 475                 double_to_sqlite(m_stmt_player_update, 5, pos.Z);
 476                 int64_to_sqlite(m_stmt_player_update, 6, sao->getHP());
 477                 int64_to_sqlite(m_stmt_player_update, 7, sao->getBreath());
 478                 str_to_sqlite(m_stmt_player_update, 8, player->getName());
 479
 480                 sqlite3_vrfy(sqlite3_step(m_stmt_player_update), SQLITE_DONE);
 481                 sqlite3_reset(m_stmt_player_update);
 482         }
 483
 484         // Write player inventories
 485         str_to_sqlite(m_stmt_player_remove_inventory, 1, player->getName());
 486         sqlite3_vrfy(sqlite3_step(m_stmt_player_remove_inventory), SQLITE_DONE);
 487         sqlite3_reset(m_stmt_player_remove_inventory);
 488
 489         str_to_sqlite(m_stmt_player_remove_inventory_items, 1, player->getName());
 490         sqlite3_vrfy(sqlite3_step(m_stmt_player_remove_inventory_items), SQLITE_DONE);
 491         sqlite3_reset(m_stmt_player_remove_inventory_items);
 492
 493         std::vector<const InventoryList*> inventory_lists = sao->getInventory()->getLists();
 494         for (u16 i = 0; i < inventory_lists.size(); i++) {
 495                 const InventoryList* list = inventory_lists[i];
 496
 497                 str_to_sqlite(m_stmt_player_add_inventory, 1, player->getName());
 498                 int_to_sqlite(m_stmt_player_add_inventory, 2, i);
 499                 int_to_sqlite(m_stmt_player_add_inventory, 3, list->getWidth());
 500                 str_to_sqlite(m_stmt_player_add_inventory, 4, list->getName());
 501                 int_to_sqlite(m_stmt_player_add_inventory, 5, list->getSize());
 502                 sqlite3_vrfy(sqlite3_step(m_stmt_player_add_inventory), SQLITE_DONE);
 503                 sqlite3_reset(m_stmt_player_add_inventory);
 504
 505                 for (u32 j = 0; j < list->getSize(); j++) {
 506                         std::ostringstream os;
 507                         list->getItem(j).serialize(os);
 508                         std::string itemStr = os.str();
 509
 510                         str_to_sqlite(m_stmt_player_add_inventory_items, 1, player->getName());
 511                         int_to_sqlite(m_stmt_player_add_inventory_items, 2, i);
 512                         int_to_sqlite(m_stmt_player_add_inventory_items, 3, j);
 513                         str_to_sqlite(m_stmt_player_add_inventory_items, 4, itemStr);
 514                         sqlite3_vrfy(sqlite3_step(m_stmt_player_add_inventory_items), SQLITE_DONE);
 515                         sqlite3_reset(m_stmt_player_add_inventory_items);
 516                 }
 517         }
 518
 519         str_to_sqlite(m_stmt_player_metadata_remove, 1, player->getName());
 520         sqlite3_vrfy(sqlite3_step(m_stmt_player_metadata_remove), SQLITE_DONE);
 521         sqlite3_reset(m_stmt_player_metadata_remove);
 522
 523         const PlayerAttributes &attrs = sao->getExtendedAttributes();
 524         for (const auto &attr : attrs) {
 525                 str_to_sqlite(m_stmt_player_metadata_add, 1, player->getName());
 526                 str_to_sqlite(m_stmt_player_metadata_add, 2, attr.first);
 527                 str_to_sqlite(m_stmt_player_metadata_add, 3, attr.second);
 528                 sqlite3_vrfy(sqlite3_step(m_stmt_player_metadata_add), SQLITE_DONE);
 529                 sqlite3_reset(m_stmt_player_metadata_add);
 530         }
 531
 532         endSave();
 533 }
 534
 535 bool PlayerDatabaseSQLite3::loadPlayer(RemotePlayer *player, PlayerSAO *sao)
 536 {
 537         verifyDatabase();
 538
 539         str_to_sqlite(m_stmt_player_load, 1, player->getName());
 540         if (sqlite3_step(m_stmt_player_load) != SQLITE_ROW) {
 541                 sqlite3_reset(m_stmt_player_load);
 542                 return false;
 543         }
 544         sao->setPitch(sqlite_to_float(m_stmt_player_load, 0));
 545         sao->setYaw(sqlite_to_float(m_stmt_player_load, 1));
 546         sao->setBasePosition(sqlite_to_v3f(m_stmt_player_load, 2));
 547         sao->setHPRaw((s16) MYMIN(sqlite_to_int(m_stmt_player_load, 5), S16_MAX));
 548         sao->setBreath((u16) MYMIN(sqlite_to_int(m_stmt_player_load, 6), U16_MAX), false);
 549         sqlite3_reset(m_stmt_player_load);
 550
 551         // Load inventory
 552         str_to_sqlite(m_stmt_player_load_inventory, 1, player->getName());
 553         while (sqlite3_step(m_stmt_player_load_inventory) == SQLITE_ROW) {
 554                 InventoryList *invList = player->inventory.addList(
 555                         sqlite_to_string(m_stmt_player_load_inventory, 2),
 556                         sqlite_to_uint(m_stmt_player_load_inventory, 3));
 557                 invList->setWidth(sqlite_to_uint(m_stmt_player_load_inventory, 1));
 558
 559                 u32 invId = sqlite_to_uint(m_stmt_player_load_inventory, 0);
 560
 561                 str_to_sqlite(m_stmt_player_load_inventory_items, 1, player->getName());
 562                 int_to_sqlite(m_stmt_player_load_inventory_items, 2, invId);
 563                 while (sqlite3_step(m_stmt_player_load_inventory_items) == SQLITE_ROW) {
 564                         const std::string itemStr = sqlite_to_string(m_stmt_player_load_inventory_items, 1);
 565                         if (itemStr.length() > 0) {
 566                                 ItemStack stack;
 567                                 stack.deSerialize(itemStr);
 568                                 invList->changeItem(sqlite_to_uint(m_stmt_player_load_inventory_items, 0), stack);
 569                         }
 570                 }
 571                 sqlite3_reset(m_stmt_player_load_inventory_items);
 572         }
 573
 574         sqlite3_reset(m_stmt_player_load_inventory);
 575
 576         str_to_sqlite(m_stmt_player_metadata_load, 1, sao->getPlayer()->getName());
 577         while (sqlite3_step(m_stmt_player_metadata_load) == SQLITE_ROW) {
 578                 std::string attr = sqlite_to_string(m_stmt_player_metadata_load, 0);
 579                 std::string value = sqlite_to_string(m_stmt_player_metadata_load, 1);
 580
 581                 sao->setExtendedAttribute(attr, value);
 582         }
 583         sqlite3_reset(m_stmt_player_metadata_load);
 584         return true;
 585 }
 586
 587 bool PlayerDatabaseSQLite3::removePlayer(const std::string &name)
 588 {
 589         if (!playerDataExists(name))
 590                 return false;
 591
 592         str_to_sqlite(m_stmt_player_remove, 1, name);
 593         sqlite3_vrfy(sqlite3_step(m_stmt_player_remove), SQLITE_DONE);
 594         sqlite3_reset(m_stmt_player_remove);
 595         return true;
 596 }
 597
 598 void PlayerDatabaseSQLite3::listPlayers(std::vector<std::string> &res)
 599 {
 600         verifyDatabase();
 601
 602         while (sqlite3_step(m_stmt_player_list) == SQLITE_ROW)
 603                 res.push_back(sqlite_to_string(m_stmt_player_list, 0));
 604
 605         sqlite3_reset(m_stmt_player_list);
 606 }