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path: root/src/database/database.h
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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#pragma once

#include <string>
#include <vector>
#include "irr_v3d.h"
#include "irrlichttypes.h"
#include "util/basic_macros.h"

class Database
{
public:
	virtual void beginSave() = 0;
	virtual void endSave() = 0;
	virtual bool initialized() const { return true; }
};

class MapDatabase : public Database
{
public:
	virtual ~MapDatabase() = default;

	virtual bool saveBlock(const v3s16 &pos, const std::string &data) = 0;
	virtual void loadBlock(const v3s16 &pos, std::string *block) = 0;
	virtual bool deleteBlock(const v3s16 &pos) = 0;

	static s64 getBlockAsInteger(const v3s16 &pos);
	static v3s16 getIntegerAsBlock(s64 i);

	virtual void listAllLoadableBlocks(std::vector<v3s16> &dst) = 0;
};

class PlayerSAO;
class RemotePlayer;

class PlayerDatabase
{
public:
	virtual ~PlayerDatabase() = default;

	virtual void savePlayer(RemotePlayer *player) = 0;
	virtual bool loadPlayer(RemotePlayer *player, PlayerSAO *sao) = 0;
	virtual bool removePlayer(const std::string &name) = 0;
	virtual void listPlayers(std::vector<std::string> &res) = 0;
};
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-21 01:29:31 +0000
a">if(lua_isfunction(L, -1)) { lua_call(L, 0, 1); if(lua_isstring(L, -1)){ s = lua_tostring(L, -1); } } lua_pop(L, 1); } lua_pop(L, 1); return s; } int script_error_handler(lua_State *L) { lua_getglobal(L, "debug"); if (!lua_istable(L, -1)) { lua_pop(L, 1); return 1; } lua_getfield(L, -1, "traceback"); if (!lua_isfunction(L, -1)) { lua_pop(L, 2); return 1; } lua_pushvalue(L, 1); lua_pushinteger(L, 2); lua_call(L, 2, 1); return 1; } int script_exception_wrapper(lua_State *L, lua_CFunction f) { try { return f(L); // Call wrapped function and return result. } catch (const char *s) { // Catch and convert exceptions. lua_pushstring(L, s); } catch (std::exception &e) { lua_pushstring(L, e.what()); } return lua_error(L); // Rethrow as a Lua error. } /* * Note that we can't get tracebacks for LUA_ERRMEM or LUA_ERRERR (without * hacking Lua internals). For LUA_ERRMEM, this is because memory errors will * not execute the the error handler, and by the time lua_pcall returns the * execution stack will have already been unwound. For LUA_ERRERR, there was * another error while trying to generate a backtrace from a LUA_ERRRUN. It is * presumed there is an error with the internal Lua state and thus not possible * to gather a coherent backtrace. Realistically, the best we can do here is * print which C function performed the failing pcall. */ void script_error(lua_State *L, int pcall_result, const char *mod, const char *fxn) { if (pcall_result == 0) return; const char *err_type; switch (pcall_result) { case LUA_ERRRUN: err_type = "Runtime"; break; case LUA_ERRMEM: err_type = "OOM"; break; case LUA_ERRERR: err_type = "Double fault"; break; default: err_type = "Unknown"; } if (!mod) mod = "??"; if (!fxn) fxn = "??"; const char *err_descr = lua_tostring(L, -1); if (!err_descr) err_descr = "<no description>"; char buf[256]; snprintf(buf, sizeof(buf), "%s error from mod '%s' in callback %s(): ", err_type, mod, fxn); std::string err_msg(buf); err_msg += err_descr; if (pcall_result == LUA_ERRMEM) { err_msg += "\nCurrent Lua memory usage: " + itos(lua_gc(L, LUA_GCCOUNT, 0) >> 10) + " MB"; } throw LuaError(err_msg); } // Push the list of callbacks (a lua table). // Then push nargs arguments. // Then call this function, which // - runs the callbacks // - replaces the table and arguments with the return value, // computed depending on mode void script_run_callbacks_f(lua_State *L, int nargs, RunCallbacksMode mode, const char *fxn) { FATAL_ERROR_IF(lua_gettop(L) < nargs + 1, "Not enough arguments"); // Insert error handler PUSH_ERROR_HANDLER(L); int error_handler = lua_gettop(L) - nargs - 1; lua_insert(L, error_handler); // Insert run_callbacks between error handler and table lua_getglobal(L, "core"); lua_getfield(L, -1, "run_callbacks"); lua_remove(L, -2); lua_insert(L, error_handler + 1); // Insert mode after table lua_pushnumber(L, (int) mode); lua_insert(L, error_handler + 3); // Stack now looks like this: // ... <error handler> <run_callbacks> <table> <mode> <arg#1> <arg#2> ... <arg#n> int result = lua_pcall(L, nargs + 2, 1, error_handler); if (result != 0) script_error(L, result, NULL, fxn); lua_remove(L, error_handler); } void log_deprecated(lua_State *L, const std::string &message) { static bool configured = false; static bool do_log = false; static bool do_error = false; // Only read settings on first call if (!configured) { std::string value = g_settings->get("deprecated_lua_api_handling"); if (value == "log") { do_log = true; } else if (value == "error") { do_log = true; do_error = true; } } if (do_log) { warningstream << message << std::endl; // L can be NULL if we get called by log_deprecated(const std::string &msg) // from scripting_game.cpp. if (L) { if (do_error) script_error(L, LUA_ERRRUN, NULL, NULL); else infostream << script_get_backtrace(L) << std::endl; } } }
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-21 01:29:30 +0000