src/database/database-sqlite3.h

   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 #pragma once
  21
  22 #include <cstring>
  23 #include <string>
  24 #include "database.h"
  25 #include "exceptions.h"
  26
  27 extern "C" {
  28 #include "sqlite3.h"
  29 }
  30
  31 class Database_SQLite3 : public Database
  32 {
  33 public:
  34         virtual ~Database_SQLite3();
  35
  36         void beginSave();
  37         void endSave();
  38
  39         bool initialized() const { return m_initialized; }
  40 protected:
  41         Database_SQLite3(const std::string &savedir, const std::string &dbname);
  42
  43         // Open and initialize the database if needed
  44         void verifyDatabase();
  45
  46         // Convertors
  47         inline void str_to_sqlite(sqlite3_stmt *s, int iCol, const std::string &str) const
  48         {
  49                 sqlite3_vrfy(sqlite3_bind_text(s, iCol, str.c_str(), str.size(), NULL));
  50         }
  51
  52         inline void str_to_sqlite(sqlite3_stmt *s, int iCol, const char *str) const
  53         {
  54                 sqlite3_vrfy(sqlite3_bind_text(s, iCol, str, strlen(str), NULL));
  55         }
  56
  57         inline void int_to_sqlite(sqlite3_stmt *s, int iCol, int val) const
  58         {
  59                 sqlite3_vrfy(sqlite3_bind_int(s, iCol, val));
  60         }
  61
  62         inline void int64_to_sqlite(sqlite3_stmt *s, int iCol, s64 val) const
  63         {
  64                 sqlite3_vrfy(sqlite3_bind_int64(s, iCol, (sqlite3_int64) val));
  65         }
  66
  67         inline void double_to_sqlite(sqlite3_stmt *s, int iCol, double val) const
  68         {
  69                 sqlite3_vrfy(sqlite3_bind_double(s, iCol, val));
  70         }
  71
  72         inline std::string sqlite_to_string(sqlite3_stmt *s, int iCol)
  73         {
  74                 const char* text = reinterpret_cast<const char*>(sqlite3_column_text(s, iCol));
  75                 return std::string(text ? text : "");
  76         }
  77
  78         inline s32 sqlite_to_int(sqlite3_stmt *s, int iCol)
  79         {
  80                 return sqlite3_column_int(s, iCol);
  81         }
  82
  83         inline u32 sqlite_to_uint(sqlite3_stmt *s, int iCol)
  84         {
  85                 return (u32) sqlite3_column_int(s, iCol);
  86         }
  87
  88         inline s64 sqlite_to_int64(sqlite3_stmt *s, int iCol)
  89         {
  90                 return (s64) sqlite3_column_int64(s, iCol);
  91         }
  92
  93         inline u64 sqlite_to_uint64(sqlite3_stmt *s, int iCol)
  94         {
  95                 return (u64) sqlite3_column_int64(s, iCol);
  96         }
  97
  98         inline float sqlite_to_float(sqlite3_stmt *s, int iCol)
  99         {
 100                 return (float) sqlite3_column_double(s, iCol);
 101         }
 102
 103         inline const v3f sqlite_to_v3f(sqlite3_stmt *s, int iCol)
 104         {
 105                 return v3f(sqlite_to_float(s, iCol), sqlite_to_float(s, iCol + 1),
 106                                 sqlite_to_float(s, iCol + 2));
 107         }
 108
 109         // Query verifiers helpers
 110         inline void sqlite3_vrfy(int s, const std::string &m = "", int r = SQLITE_OK) const
 111         {
 112                 if (s != r)
 113                         throw DatabaseException(m + ": " + sqlite3_errmsg(m_database));
 114         }
 115
 116         inline void sqlite3_vrfy(const int s, const int r, const std::string &m = "") const
 117         {
 118                 sqlite3_vrfy(s, m, r);
 119         }
 120
 121         // Create the database structure
 122         virtual void createDatabase() = 0;
 123         virtual void initStatements() = 0;
 124
 125         sqlite3 *m_database = nullptr;
 126 private:
 127         // Open the database
 128         void openDatabase();
 129
 130         bool m_initialized = false;
 131
 132         std::string m_savedir = "";
 133         std::string m_dbname = "";
 134
 135         sqlite3_stmt *m_stmt_begin = nullptr;
 136         sqlite3_stmt *m_stmt_end = nullptr;
 137
 138         s64 m_busy_handler_data[2];
 139
 140         static int busyHandler(void *data, int count);
 141 };
 142
 143 class MapDatabaseSQLite3 : private Database_SQLite3, public MapDatabase
 144 {
 145 public:
 146         MapDatabaseSQLite3(const std::string &savedir);
 147         virtual ~MapDatabaseSQLite3();
 148
 149         bool saveBlock(const v3s16 &pos, const std::string &data);
 150         void loadBlock(const v3s16 &pos, std::string *block);
 151         bool deleteBlock(const v3s16 &pos);
 152         void listAllLoadableBlocks(std::vector<v3s16> &dst);
 153
 154         void beginSave() { Database_SQLite3::beginSave(); }
 155         void endSave() { Database_SQLite3::endSave(); }
 156 protected:
 157         virtual void createDatabase();
 158         virtual void initStatements();
 159
 160 private:
 161         void bindPos(sqlite3_stmt *stmt, const v3s16 &pos, int index = 1);
 162
 163         // Map
 164         sqlite3_stmt *m_stmt_read = nullptr;
 165         sqlite3_stmt *m_stmt_write = nullptr;
 166         sqlite3_stmt *m_stmt_list = nullptr;
 167         sqlite3_stmt *m_stmt_delete = nullptr;
 168 };
 169
 170 class PlayerDatabaseSQLite3 : private Database_SQLite3, public PlayerDatabase
 171 {
 172 public:
 173         PlayerDatabaseSQLite3(const std::string &savedir);
 174         virtual ~PlayerDatabaseSQLite3();
 175
 176         void savePlayer(RemotePlayer *player);
 177         bool loadPlayer(RemotePlayer *player, PlayerSAO *sao);
 178         bool removePlayer(const std::string &name);
 179         void listPlayers(std::vector<std::string> &res);
 180
 181 protected:
 182         virtual void createDatabase();
 183         virtual void initStatements();
 184
 185 private:
 186         bool playerDataExists(const std::string &name);
 187
 188         // Players
 189         sqlite3_stmt *m_stmt_player_load = nullptr;
 190         sqlite3_stmt *m_stmt_player_add = nullptr;
 191         sqlite3_stmt *m_stmt_player_update = nullptr;
 192         sqlite3_stmt *m_stmt_player_remove = nullptr;
 193         sqlite3_stmt *m_stmt_player_list = nullptr;
 194         sqlite3_stmt *m_stmt_player_load_inventory = nullptr;
 195         sqlite3_stmt *m_stmt_player_load_inventory_items = nullptr;
 196         sqlite3_stmt *m_stmt_player_add_inventory = nullptr;
 197         sqlite3_stmt *m_stmt_player_add_inventory_items = nullptr;
 198         sqlite3_stmt *m_stmt_player_remove_inventory = nullptr;
 199         sqlite3_stmt *m_stmt_player_remove_inventory_items = nullptr;
 200         sqlite3_stmt *m_stmt_player_metadata_load = nullptr;
 201         sqlite3_stmt *m_stmt_player_metadata_remove = nullptr;
 202         sqlite3_stmt *m_stmt_player_metadata_add = nullptr;
 203 };
 204
 205 class AuthDatabaseSQLite3 : private Database_SQLite3, public AuthDatabase
 206 {
 207 public:
 208         AuthDatabaseSQLite3(const std::string &savedir);
 209         virtual ~AuthDatabaseSQLite3();
 210
 211         virtual bool getAuth(const std::string &name, AuthEntry &res);
 212         virtual bool saveAuth(const AuthEntry &authEntry);
 213         virtual bool createAuth(AuthEntry &authEntry);
 214         virtual bool deleteAuth(const std::string &name);
 215         virtual void listNames(std::vector<std::string> &res);
 216         virtual void reload();
 217
 218 protected:
 219         virtual void createDatabase();
 220         virtual void initStatements();
 221
 222 private:
 223         virtual void writePrivileges(const AuthEntry &authEntry);
 224
 225         sqlite3_stmt *m_stmt_read = nullptr;
 226         sqlite3_stmt *m_stmt_write = nullptr;
 227         sqlite3_stmt *m_stmt_create = nullptr;
 228         sqlite3_stmt *m_stmt_delete = nullptr;
 229         sqlite3_stmt *m_stmt_list_names = nullptr;
 230         sqlite3_stmt *m_stmt_read_privs = nullptr;
 231         sqlite3_stmt *m_stmt_write_privs = nullptr;
 232         sqlite3_stmt *m_stmt_delete_privs = nullptr;
 233         sqlite3_stmt *m_stmt_last_insert_rowid = nullptr;
 234 };