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path: root/src/debug.cpp
Commit message (Collapse)AuthorAge
* Add server side ncurses terminalest312015-11-06
| | | | | | | | | | | | | | | | | | | | | | | | This adds a chat console the server owner can use for administration or to talk with players. It runs in its own thread, which makes the user interface immune to the server's lag, behaving just like a client, except timeout. As it uses the same console code as the f10 console, things like nick completion or a scroll buffer basically come for free. The terminal itself is written in a general way so that adding a client version later on is just about implementing an interface. Fatal errors are printed after the console exists and the ncurses terminal buffer gets cleaned up with endwin(), so that the error still remains visible. The server owner can chose their username their entered text will have in chat and where players can send PMs to. Once the username is secured with a password to prevent anybody to take over the server, the owner can execute admin tasks over the console. This change includes a contribution by @kahrl who has improved ncurses library detection.
* Fix C++11 compatibilitykwolekr2015-10-31
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* Refactor thread utility interfacekwolekr2015-10-16
| | | | | - Add "thr_" prefix to thread utility functions - Compare threadid_ts in a portable manner, where possible
* Refactor loggingShadowNinja2015-10-14
| | | | | | | | | - Add warning log level - Change debug_log_level setting to enumeration string - Map Irrlicht log events to MT log events - Encapsulate log_* functions and global variables into a class, Logger - Unify dstream with standard logging mechanism - Unify core.debug() with standard core.log() script API
* Clean up threadingShadowNinja2015-08-23
| | | | | | | | | | | | | | | | | | | | * Rename everything. * Strip J prefix. * Change UpperCamelCase functions to lowerCamelCase. * Remove global (!) semaphore count mutex on OSX. * Remove semaphore count getter (unused, unsafe, depended on internal API functions on Windows, and used a hack on OSX). * Add `Atomic<type>`. * Make `Thread` handle thread names. * Add support for C++11 multi-threading. * Combine pthread and win32 sources. * Remove `ThreadStarted` (unused, unneeded). * Move some includes from the headers to the sources. * Move all of `Event` into its header (allows inlining with no new includes). * Make `Event` use `Semaphore` (except on Windows). * Move some porting functions into `Thread`. * Integrate logging with `Thread`. * Add threading test.
* Fix MSVC compile errorShadowNinja2015-03-27
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* Clean up and tweak build systemShadowNinja2015-03-27
| | | | | | | | | | | | | | | | * Combine client and server man pages. * Update unit test options and available databases in man page. * Add `--worldname` to man page. * Fix a bunch of places where `"Minetest"` was used directly instead of `PROJECT_NAME`. * Disable server build by default on all operating systems. * Make `ENABLE_FREETYPE` not fail if FreeType isn't found. * Enable LevelDB, Redis, and FreeType detection by default. * Remove the `VERSION_PATCH_ORIG` hack. * Add option to search for and use system JSONCPP. * Remove broken LuaJIT version detection. * Rename `DISABLE_LUAJIT` to `ENABLE_LUAJIT`. * Rename `minetest_*` variables in `version.{h,cpp}` to `g_*`. * Clean up style of CMake files.
* For usages of assert() that are meant to persist in Release builds (when ↵Craig Robbins2015-03-07
| | | | NDEBUG is defined), replace those usages with persistent alternatives
* Create minidump on fatal Win32 exceptionskwolekr2015-02-02
| | | | | Remove software exception translator function, simplifying exception handler macros. FatalSystemExceptions are left unhandled.
* Performance fixes.onkrot2015-01-13
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* Add support for Android 2.3+sapier2014-06-29
| | | | | | | | | | | | | There have been plenty of ppl involved in creating this version. I don't wanna mention names as I'm sure I'd forget someone so I just tell where help has been done: - The partial android versions done by various ppl - Testing on different android devices - reviewing code (especially the in core changes) - testing controls - reviewing texts A big thank you to everyone helping this to be completed!
* Cleanup jthread and fix win32 buildsapier2013-12-01
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* Always use builtin JThread librarykwolekr2013-09-15
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* Omnicleanup: header cleanup, add ModApiUtil shared between game and mainmenuKahrl2013-08-14
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* Migrate to STL containers/algorithms.Ilya Zhuravlev2013-03-11
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* Update Copyright YearsSfan52013-02-24
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* Change Minetest-c55 to MinetestPilzAdam2013-02-24
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* Optimize headersPerttu Ahola2012-06-17
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* Switch the license to be LGPLv2/later, with small parts still remaining as ↵Perttu Ahola2012-06-05
| | | | GPLv2/later, by agreement of major contributors
* Remove useless debug output (log at info level)Perttu Ahola2012-03-11
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* Clean up log messages everywherePerttu Ahola2012-03-11
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* Improve debug stack printing interfacePerttu Ahola2011-11-29
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* Prevent threadid_t from losing precision when casted on 64bit systemsq662011-08-11
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* fixed warnings reported by cppcheckPerttu Ahola2011-04-11
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* fixes toward mingw compatibilityPerttu Ahola2011-02-10
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* local game connects to 127.0.0.1 instead of localhost (windows returns an ↵Perttu Ahola2011-02-08
| | | | ipv6 address sometimes which is not supported)
* backing up some stuffPerttu Ahola2011-01-26
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* Added a more flexible path system (and fixed some minor stuff)Perttu Ahola2011-01-07
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* better debug output in segfaults and stack overflows in windowsPerttu Ahola2010-12-27
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* some work-in-progressPerttu Ahola2010-12-22
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* license stuff (more to come)Perttu Ahola2010-11-29
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* Windows bug fixesPerttu Ahola2010-11-29
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* Initial filesPerttu Ahola2010-11-27
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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.
*/
#include "common/c_content.h"
#include "common/c_converter.h"
#include "common/c_types.h"
#include "nodedef.h"
#include "itemdef.h"
#include "object_properties.h"
#include "cpp_api/s_node.h"
#include "lua_api/l_object.h"
#include "lua_api/l_item.h"
#include "common/c_internal.h"
#include "server.h"
#include "log.h"
#include "tool.h"
#include "serverobject.h"
#include "porting.h"
#include "mg_schematic.h"
#include "noise.h"
#include <json/json.h>

struct EnumString es_TileAnimationType[] =
{
	{TAT_NONE, "none"},
	{TAT_VERTICAL_FRAMES, "vertical_frames"},
	{0, NULL},
};

/******************************************************************************/
ItemDefinition read_item_definition(lua_State* L,int index,
		ItemDefinition default_def)
{
	if(index < 0)
		index = lua_gettop(L) + 1 + index;

	// Read the item definition
	ItemDefinition def = default_def;

	def.type = (ItemType)getenumfield(L, index, "type",
			es_ItemType, ITEM_NONE);
	getstringfield(L, index, "name", def.name);
	getstringfield(L, index, "description", def.description);
	getstringfield(L, index, "inventory_image", def.inventory_image);
	getstringfield(L, index, "wield_image", def.wield_image);

	lua_getfield(L, index, "wield_scale");
	if(lua_istable(L, -1)){
		def.wield_scale = check_v3f(L, -1);
	}
	lua_pop(L, 1);

	int stack_max = getintfield_default(L, index, "stack_max", def.stack_max);
	def.stack_max = rangelim(stack_max, 1, U16_MAX);

	lua_getfield(L, index, "on_use");
	def.usable = lua_isfunction(L, -1);
	lua_pop(L, 1);

	getboolfield(L, index, "liquids_pointable", def.liquids_pointable);

	warn_if_field_exists(L, index, "tool_digging_properties",
			"Deprecated; use tool_capabilities");

	lua_getfield(L, index, "tool_capabilities");
	if(lua_istable(L, -1)){
		def.tool_capabilities = new ToolCapabilities(
				read_tool_capabilities(L, -1));
	}

	// If name is "" (hand), ensure there are ToolCapabilities
	// because it will be looked up there whenever any other item has
	// no ToolCapabilities
	if(def.name == "" && def.tool_capabilities == NULL){
		def.tool_capabilities = new ToolCapabilities();
	}

	lua_getfield(L, index, "groups");
	read_groups(L, -1, def.groups);
	lua_pop(L, 1);

	lua_getfield(L, index, "sounds");
	if(lua_istable(L, -1)){
		lua_getfield(L, -1, "place");
		read_soundspec(L, -1, def.sound_place);
		lua_pop(L, 1);
		lua_getfield(L, -1, "place_failed");
		read_soundspec(L, -1, def.sound_place_failed);
		lua_pop(L, 1);
	}
	lua_pop(L, 1);

	def.range = getfloatfield_default(L, index, "range", def.range);

	// Client shall immediately place this node when player places the item.
	// Server will update the precise end result a moment later.
	// "" = no prediction
	getstringfield(L, index, "node_placement_prediction",
			def.node_placement_prediction);

	return def;
}

/******************************************************************************/
void read_object_properties(lua_State *L, int index,
		ObjectProperties *prop)
{
	if(index < 0)
		index = lua_gettop(L) + 1 + index;
	if(!lua_istable(L, index))
		return;

	prop->hp_max = getintfield_default(L, -1, "hp_max", 10);

	getboolfield(L, -1, "physical", prop->physical);
	getboolfield(L, -1, "collide_with_objects", prop->collideWithObjects);

	getfloatfield(L, -1, "weight", prop->weight);

	lua_getfield(L, -1, "collisionbox");
	if(lua_istable(L, -1))
		prop->collisionbox = read_aabb3f(L, -1, 1.0);
	lua_pop(L, 1);

	getstringfield(L, -1, "visual", prop->visual);

	getstringfield(L, -1, "mesh", prop->mesh);

	lua_getfield(L, -1, "visual_size");
	if(lua_istable(L, -1))
		prop->visual_size = read_v2f(L, -1);
	lua_pop(L, 1);

	lua_getfield(L, -1, "textures");
	if(lua_istable(L, -1)){
		prop->textures.clear();
		int table = lua_gettop(L);
		lua_pushnil(L);
		while(lua_next(L, table) != 0){
			// key at index -2 and value at index -1
			if(lua_isstring(L, -1))
				prop->textures.push_back(lua_tostring(L, -1));
			else
				prop->textures.push_back("");
			// removes value, keeps key for next iteration
			lua_pop(L, 1);
		}
	}
	lua_pop(L, 1);

	lua_getfield(L, -1, "colors");
	if (lua_istable(L, -1)) {
		int table = lua_gettop(L);
		prop->colors.clear();
		for (lua_pushnil(L); lua_next(L, table); lua_pop(L, 1)) {
			video::SColor color(255, 255, 255, 255);
			read_color(L, -1, &color);
			prop->colors.push_back(color);
		}
	}
	lua_pop(L, 1);

	lua_getfield(L, -1, "spritediv");
	if(lua_istable(L, -1))
		prop->spritediv = read_v2s16(L, -1);
	lua_pop(L, 1);

	lua_getfield(L, -1, "initial_sprite_basepos");
	if(lua_istable(L, -1))
		prop->initial_sprite_basepos = read_v2s16(L, -1);
	lua_pop(L, 1);

	getboolfield(L, -1, "is_visible", prop->is_visible);
	getboolfield(L, -1, "makes_footstep_sound", prop->makes_footstep_sound);
	getfloatfield(L, -1, "automatic_rotate", prop->automatic_rotate);
	if (getfloatfield(L, -1, "stepheight", prop->stepheight))
		prop->stepheight *= BS;
	lua_getfield(L, -1, "automatic_face_movement_dir");
	if (lua_isnumber(L, -1)) {
		prop->automatic_face_movement_dir = true;
		prop->automatic_face_movement_dir_offset = luaL_checknumber(L, -1);
	} else if (lua_isboolean(L, -1)) {
		prop->automatic_face_movement_dir = lua_toboolean(L, -1);
		prop->automatic_face_movement_dir_offset = 0.0;
	}
	lua_pop(L, 1);
	getboolfield(L, -1, "backface_culling", prop->backface_culling);

	getstringfield(L, -1, "nametag", prop->nametag);
	lua_getfield(L, -1, "nametag_color");
	if (!lua_isnil(L, -1)) {
		video::SColor color = prop->nametag_color;
		if (read_color(L, -1, &color))
			prop->nametag_color = color;
	}
	lua_pop(L, 1);

	lua_getfield(L, -1, "automatic_face_movement_max_rotation_per_sec");
	if (lua_isnumber(L, -1)) {
		prop->automatic_face_movement_max_rotation_per_sec = luaL_checknumber(L, -1);
	}
	lua_pop(L, 1);
	getstringfield(L, -1, "infotext", prop->infotext);
}

/******************************************************************************/
void push_object_properties(lua_State *L, ObjectProperties *prop)
{
	lua_newtable(L);
	lua_pushnumber(L, prop->hp_max);
	lua_setfield(L, -2, "hp_max");
	lua_pushboolean(L, prop->physical);
	lua_setfield(L, -2, "physical");
	lua_pushboolean(L, prop->collideWithObjects);
	lua_setfield(L, -2, "collide_with_objects");
	lua_pushnumber(L, prop->weight);
	lua_setfield(L, -2, "weight");
	push_aabb3f(L, prop->collisionbox);
	lua_setfield(L, -2, "collisionbox");
	lua_pushlstring(L, prop->visual.c_str(), prop->visual.size());
	lua_setfield(L, -2, "visual");
	lua_pushlstring(L, prop->mesh.c_str(), prop->mesh.size());
	lua_setfield(L, -2, "mesh");
	push_v2f(L, prop->visual_size);
	lua_setfield(L, -2, "visual_size");

	lua_newtable(L);
	u16 i = 1;
	for (std::vector<std::string>::iterator it = prop->textures.begin();
			it != prop->textures.end(); ++it) {
		lua_pushlstring(L, it->c_str(), it->size());
		lua_rawseti(L, -2, i);
	}
	lua_setfield(L, -2, "textures");

	lua_newtable(L);
	i = 1;
	for (std::vector<video::SColor>::iterator it = prop->colors.begin();
			it != prop->colors.end(); ++it) {
		push_ARGB8(L, *it);
		lua_rawseti(L, -2, i);
	}
	lua_setfield(L, -2, "colors");

	push_v2s16(L, prop->spritediv);
	lua_setfield(L, -2, "spritediv");
	push_v2s16(L, prop->initial_sprite_basepos);
	lua_setfield(L, -2, "initial_sprite_basepos");
	lua_pushboolean(L, prop->is_visible);
	lua_setfield(L, -2, "is_visible");
	lua_pushboolean(L, prop->makes_footstep_sound);
	lua_setfield(L, -2, "makes_footstep_sound");
	lua_pushnumber(L, prop->automatic_rotate);
	lua_setfield(L, -2, "automatic_rotate");
	lua_pushnumber(L, prop->stepheight / BS);
	lua_setfield(L, -2, "stepheight");
	if (prop->automatic_face_movement_dir)
		lua_pushnumber(L, prop->automatic_face_movement_dir_offset);
	else
		lua_pushboolean(L, false);
	lua_setfield(L, -2, "automatic_face_movement_dir");
	lua_pushboolean(L, prop->backface_culling);
	lua_setfield(L, -2, "backface_culling");
	lua_pushlstring(L, prop->nametag.c_str(), prop->nametag.size());
	lua_setfield(L, -2, "nametag");
	push_ARGB8(L, prop->nametag_color);
	lua_setfield(L, -2, "nametag_color");
	lua_pushnumber(L, prop->automatic_face_movement_max_rotation_per_sec);
	lua_setfield(L, -2, "automatic_face_movement_max_rotation_per_sec");
	lua_pushlstring(L, prop->infotext.c_str(), prop->infotext.size());
	lua_setfield(L, -2, "infotext");
}

/******************************************************************************/
TileDef read_tiledef(lua_State *L, int index, u8 drawtype)
{
	if(index < 0)
		index = lua_gettop(L) + 1 + index;

	TileDef tiledef;

	bool default_tiling = true;
	bool default_culling = true;
	switch (drawtype) {
		case NDT_PLANTLIKE:
		case NDT_FIRELIKE:
			default_tiling = false;
			// "break" is omitted here intentionaly, as PLANTLIKE
			// FIRELIKE drawtype both should default to having
			// backface_culling to false.
		case NDT_MESH:
		case NDT_LIQUID:
			default_culling = false;
			break;
		default:
			break;
	}

	// key at index -2 and value at index
	if(lua_isstring(L, index)){
		// "default_lava.png"
		tiledef.name = lua_tostring(L, index);
		tiledef.tileable_vertical = default_tiling;
		tiledef.tileable_horizontal = default_tiling;
		tiledef.backface_culling = default_culling;
	}
	else if(lua_istable(L, index))
	{
		// {name="default_lava.png", animation={}}
		tiledef.name = "";
		getstringfield(L, index, "name", tiledef.name);
		getstringfield(L, index, "image", tiledef.name); // MaterialSpec compat.
		tiledef.backface_culling = getboolfield_default(
			L, index, "backface_culling", default_culling);
		tiledef.tileable_horizontal = getboolfield_default(
			L, index, "tileable_horizontal", default_tiling);
		tiledef.tileable_vertical = getboolfield_default(
			L, index, "tileable_vertical", default_tiling);
		// animation = {}
		lua_getfield(L, index, "animation");
		if(lua_istable(L, -1)){
			// {type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0}
			tiledef.animation.type = (TileAnimationType)
				getenumfield(L, -1, "type", es_TileAnimationType,
				TAT_NONE);
			tiledef.animation.aspect_w =
				getintfield_default(L, -1, "aspect_w", 16);
			tiledef.animation.aspect_h =
				getintfield_default(L, -1, "aspect_h", 16);
			tiledef.animation.length =
				getfloatfield_default(L, -1, "length", 1.0);
		}
		lua_pop(L, 1);
	}

	return tiledef;
}

/******************************************************************************/
ContentFeatures read_content_features(lua_State *L, int index)
{
	if(index < 0)
		index = lua_gettop(L) + 1 + index;

	ContentFeatures f;

	/* Cache existence of some callbacks */
	lua_getfield(L, index, "on_construct");
	if(!lua_isnil(L, -1)) f.has_on_construct = true;
	lua_pop(L, 1);
	lua_getfield(L, index, "on_destruct");
	if(!lua_isnil(L, -1)) f.has_on_destruct = true;
	lua_pop(L, 1);
	lua_getfield(L, index, "after_destruct");
	if(!lua_isnil(L, -1)) f.has_after_destruct = true;
	lua_pop(L, 1);

	lua_getfield(L, index, "on_rightclick");
	f.rightclickable = lua_isfunction(L, -1);
	lua_pop(L, 1);

	/* Name */
	getstringfield(L, index, "name", f.name);

	/* Groups */
	lua_getfield(L, index, "groups");
	read_groups(L, -1, f.groups);
	lua_pop(L, 1);

	/* Visual definition */

	f.drawtype = (NodeDrawType)getenumfield(L, index, "drawtype",
			ScriptApiNode::es_DrawType,NDT_NORMAL);
	getfloatfield(L, index, "visual_scale", f.visual_scale);

	/* Meshnode model filename */
	getstringfield(L, index, "mesh", f.mesh);

	// tiles = {}
	lua_getfield(L, index, "tiles");
	// If nil, try the deprecated name "tile_images" instead
	if(lua_isnil(L, -1)){
		lua_pop(L, 1);
		warn_if_field_exists(L, index, "tile_images",
				"Deprecated; new name is \"tiles\".");
		lua_getfield(L, index, "tile_images");
	}
	if(lua_istable(L, -1)){
		int table = lua_gettop(L);
		lua_pushnil(L);
		int i = 0;
		while(lua_next(L, table) != 0){
			// Read tiledef from value
			f.tiledef[i] = read_tiledef(L, -1, f.drawtype);
			// removes value, keeps key for next iteration
			lua_pop(L, 1);
			i++;
			if(i==6){
				lua_pop(L, 1);
				break;
			}
		}
		// Copy last value to all remaining textures
		if(i >= 1){
			TileDef lasttile = f.tiledef[i-1];
			while(i < 6){
				f.tiledef[i] = lasttile;
				i++;
			}
		}
	}
	lua_pop(L, 1);

	// special_tiles = {}
	lua_getfield(L, index, "special_tiles");
	// If nil, try the deprecated name "special_materials" instead
	if(lua_isnil(L, -1)){
		lua_pop(L, 1);
		warn_if_field_exists(L, index, "special_materials",
				"Deprecated; new name is \"special_tiles\".");
		lua_getfield(L, index, "special_materials");
	}
	if(lua_istable(L, -1)){
		int table = lua_gettop(L);
		lua_pushnil(L);
		int i = 0;
		while(lua_next(L, table) != 0){
			// Read tiledef from value
			f.tiledef_special[i] = read_tiledef(L, -1, f.drawtype);
			// removes value, keeps key for next iteration
			lua_pop(L, 1);
			i++;
			if(i==CF_SPECIAL_COUNT){
				lua_pop(L, 1);
				break;
			}
		}
	}
	lua_pop(L, 1);

	f.alpha = getintfield_default(L, index, "alpha", 255);

	bool usealpha = getboolfield_default(L, index,
			"use_texture_alpha", false);
	if (usealpha)
		f.alpha = 0;

	/* Other stuff */

	lua_getfield(L, index, "post_effect_color");
	read_color(L, -1, &f.post_effect_color);
	lua_pop(L, 1);

	f.param_type = (ContentParamType)getenumfield(L, index, "paramtype",
			ScriptApiNode::es_ContentParamType, CPT_NONE);
	f.param_type_2 = (ContentParamType2)getenumfield(L, index, "paramtype2",
			ScriptApiNode::es_ContentParamType2, CPT2_NONE);

	// Warn about some deprecated fields
	warn_if_field_exists(L, index, "wall_mounted",
			"Deprecated; use paramtype2 = 'wallmounted'");
	warn_if_field_exists(L, index, "light_propagates",
			"Deprecated; determined from paramtype");
	warn_if_field_exists(L, index, "dug_item",
			"Deprecated; use 'drop' field");
	warn_if_field_exists(L, index, "extra_dug_item",
			"Deprecated; use 'drop' field");
	warn_if_field_exists(L, index, "extra_dug_item_rarity",
			"Deprecated; use 'drop' field");
	warn_if_field_exists(L, index, "metadata_name",
			"Deprecated; use on_add and metadata callbacks");

	// True for all ground-like things like stone and mud, false for eg. trees
	getboolfield(L, index, "is_ground_content", f.is_ground_content);
	f.light_propagates = (f.param_type == CPT_LIGHT);
	getboolfield(L, index, "sunlight_propagates", f.sunlight_propagates);
	// This is used for collision detection.
	// Also for general solidness queries.
	getboolfield(L, index, "walkable", f.walkable);
	// Player can point to these
	getboolfield(L, index, "pointable", f.pointable);
	// Player can dig these
	getboolfield(L, index, "diggable", f.diggable);
	// Player can climb these
	getboolfield(L, index, "climbable", f.climbable);
	// Player can build on these
	getboolfield(L, index, "buildable_to", f.buildable_to);
	// Liquids flow into and replace node
	getboolfield(L, index, "floodable", f.floodable);
	// Whether the node is non-liquid, source liquid or flowing liquid
	f.liquid_type = (LiquidType)getenumfield(L, index, "liquidtype",
			ScriptApiNode::es_LiquidType, LIQUID_NONE);
	// If the content is liquid, this is the flowing version of the liquid.
	getstringfield(L, index, "liquid_alternative_flowing",
			f.liquid_alternative_flowing);
	// If the content is liquid, this is the source version of the liquid.
	getstringfield(L, index, "liquid_alternative_source",
			f.liquid_alternative_source);
	// Viscosity for fluid flow, ranging from 1 to 7, with
	// 1 giving almost instantaneous propagation and 7 being
	// the slowest possible
	f.liquid_viscosity = getintfield_default(L, index,
			"liquid_viscosity", f.liquid_viscosity);
	f.liquid_range = getintfield_default(L, index,
			"liquid_range", f.liquid_range);
	f.leveled = getintfield_default(L, index, "leveled", f.leveled);

	getboolfield(L, index, "liquid_renewable", f.liquid_renewable);
	f.drowning = getintfield_default(L, index,
			"drowning", f.drowning);
	// Amount of light the node emits
	f.light_source = getintfield_default(L, index,
			"light_source", f.light_source);
	f.damage_per_second = getintfield_default(L, index,
			"damage_per_second", f.damage_per_second);

	lua_getfield(L, index, "node_box");
	if(lua_istable(L, -1))
		f.node_box = read_nodebox(L, -1);
	lua_pop(L, 1);

	lua_getfield(L, index, "connects_to");
	if (lua_istable(L, -1)) {
		int table = lua_gettop(L);
		lua_pushnil(L);
		while (lua_next(L, table) != 0) {
			// Value at -1
			f.connects_to.push_back(lua_tostring(L, -1));
			lua_pop(L, 1);
		}
	}
	lua_pop(L, 1);

	lua_getfield(L, index, "connect_sides");
	if (lua_istable(L, -1)) {
		int table = lua_gettop(L);
		lua_pushnil(L);
		while (lua_next(L, table) != 0) {
			// Value at -1
			std::string side(lua_tostring(L, -1));
			// Note faces are flipped to make checking easier
			if (side == "top")
				f.connect_sides |= 2;
			else if (side == "bottom")
				f.connect_sides |= 1;
			else if (side == "front")
				f.connect_sides |= 16;
			else if (side == "left")
				f.connect_sides |= 32;
			else if (side == "back")
				f.connect_sides |= 4;
			else if (side == "right")
				f.connect_sides |= 8;
			else
				warningstream << "Unknown value for \"connect_sides\": "
					<< side << std::endl;
			lua_pop(L, 1);
		}
	}
	lua_pop(L, 1);

	lua_getfield(L, index, "selection_box");
	if(lua_istable(L, -1))
		f.selection_box = read_nodebox(L, -1);
 	lua_pop(L, 1);

	lua_getfield(L, index, "collision_box");
	if(lua_istable(L, -1))
		f.collision_box = read_nodebox(L, -1);
	lua_pop(L, 1);

	f.waving = getintfield_default(L, index,
			"waving", f.waving);

	// Set to true if paramtype used to be 'facedir_simple'
	getboolfield(L, index, "legacy_facedir_simple", f.legacy_facedir_simple);
	// Set to true if wall_mounted used to be set to true
	getboolfield(L, index, "legacy_wallmounted", f.legacy_wallmounted);

	// Sound table
	lua_getfield(L, index, "sounds");
	if(lua_istable(L, -1)){
		lua_getfield(L, -1, "footstep");
		read_soundspec(L, -1, f.sound_footstep);
		lua_pop(L, 1);
		lua_getfield(L, -1, "dig");
		read_soundspec(L, -1, f.sound_dig);
		lua_pop(L, 1);
		lua_getfield(L, -1, "dug");
		read_soundspec(L, -1, f.sound_dug);
		lua_pop(L, 1);
	}
	lua_pop(L, 1);

	return f;
}

/******************************************************************************/
void read_server_sound_params(lua_State *L, int index,
		ServerSoundParams &params)
{
	if(index < 0)
		index = lua_gettop(L) + 1 + index;
	// Clear
	params = ServerSoundParams();
	if(lua_istable(L, index)){
		getfloatfield(L, index, "gain", params.gain);
		getstringfield(L, index, "to_player", params.to_player);
		lua_getfield(L, index, "pos");
		if(!lua_isnil(L, -1)){
			v3f p = read_v3f(L, -1)*BS;
			params.pos = p;
			params.type = ServerSoundParams::SSP_POSITIONAL;
		}
		lua_pop(L, 1);
		lua_getfield(L, index, "object");
		if(!lua_isnil(L, -1)){
			ObjectRef *ref = ObjectRef::checkobject(L, -1);
			ServerActiveObject *sao = ObjectRef::getobject(ref);
			if(sao){
				params.object = sao->getId();
				params.type = ServerSoundParams::SSP_OBJECT;
			}
		}
		lua_pop(L, 1);
		params.max_hear_distance = BS*getfloatfield_default(L, index,
				"max_hear_distance", params.max_hear_distance/BS);
		getboolfield(L, index, "loop", params.loop);
	}
}

/******************************************************************************/
void read_soundspec(lua_State *L, int index, SimpleSoundSpec &spec)
{
	if(index < 0)
		index = lua_gettop(L) + 1 + index;
	if(lua_isnil(L, index)){
	} else if(lua_istable(L, index)){
		getstringfield(L, index, "name", spec.name);
		getfloatfield(L, index, "gain", spec.gain);
	} else if(lua_isstring(L, index)){
		spec.name = lua_tostring(L, index);
	}
}

/******************************************************************************/
NodeBox read_nodebox(lua_State *L, int index)
{
	NodeBox nodebox;
	if(lua_istable(L, -1)){
		nodebox.type = (NodeBoxType)getenumfield(L, index, "type",
				ScriptApiNode::es_NodeBoxType, NODEBOX_REGULAR);

#define NODEBOXREAD(n, s) \
	do { \
		lua_getfield(L, index, (s)); \
		if (lua_istable(L, -1)) \
			(n) = read_aabb3f(L, -1, BS); \
		lua_pop(L, 1); \
	} while (0)

#define NODEBOXREADVEC(n, s) \
	do { \
		lua_getfield(L, index, (s)); \
		if (lua_istable(L, -1)) \
			(n) = read_aabb3f_vector(L, -1, BS); \
		lua_pop(L, 1); \
	} while (0)
		NODEBOXREADVEC(nodebox.fixed, "fixed");
		NODEBOXREAD(nodebox.wall_top, "wall_top");
		NODEBOXREAD(nodebox.wall_bottom, "wall_bottom");
		NODEBOXREAD(nodebox.wall_side, "wall_side");
		NODEBOXREADVEC(nodebox.connect_top, "connect_top");
		NODEBOXREADVEC(nodebox.connect_bottom, "connect_bottom");
		NODEBOXREADVEC(nodebox.connect_front, "connect_front");
		NODEBOXREADVEC(nodebox.connect_left, "connect_left");
		NODEBOXREADVEC(nodebox.connect_back, "connect_back");
		NODEBOXREADVEC(nodebox.connect_right, "connect_right");
	}
	return nodebox;
}

/******************************************************************************/
MapNode readnode(lua_State *L, int index, INodeDefManager *ndef)
{
	lua_getfield(L, index, "name");
	if (!lua_isstring(L, -1))
		throw LuaError("Node name is not set or is not a string!");
	const char *name = lua_tostring(L, -1);
	lua_pop(L, 1);

	u8 param1 = 0;
	lua_getfield(L, index, "param1");
	if (!lua_isnil(L, -1))
		param1 = lua_tonumber(L, -1);
	lua_pop(L, 1);

	u8 param2 = 0;
	lua_getfield(L, index, "param2");
	if (!lua_isnil(L, -1))
		param2 = lua_tonumber(L, -1);
	lua_pop(L, 1);

	return MapNode(ndef, name, param1, param2);
}

/******************************************************************************/
void pushnode(lua_State *L, const MapNode &n, INodeDefManager *ndef)
{
	lua_newtable(L);
	lua_pushstring(L, ndef->get(n).name.c_str());
	lua_setfield(L, -2, "name");
	lua_pushnumber(L, n.getParam1());
	lua_setfield(L, -2, "param1");
	lua_pushnumber(L, n.getParam2());
	lua_setfield(L, -2, "param2");
}

/******************************************************************************/
void warn_if_field_exists(lua_State *L, int table,
		const char *name, const std::string &message)
{
	lua_getfield(L, table, name);
	if (!lua_isnil(L, -1)) {
		warningstream << "Field \"" << name << "\": "
				<< message << std::endl;
		infostream << script_get_backtrace(L) << std::endl;
	}
	lua_pop(L, 1);
}

/******************************************************************************/
int getenumfield(lua_State *L, int table,
		const char *fieldname, const EnumString *spec, int default_)
{
	int result = default_;
	string_to_enum(spec, result,
			getstringfield_default(L, table, fieldname, ""));
	return result;
}

/******************************************************************************/
bool string_to_enum(const EnumString *spec, int &result,
		const std::string &str)
{
	const EnumString *esp = spec;
	while(esp->str){
		if(str == std::string(esp->str)){
			result = esp->num;
			return true;
		}
		esp++;
	}
	return false;
}

/******************************************************************************/
ItemStack read_item(lua_State* L, int index,Server* srv)
{
	if(index < 0)
		index = lua_gettop(L) + 1 + index;

	if(lua_isnil(L, index))
	{
		return ItemStack();
	}
	else if(lua_isuserdata(L, index))
	{
		// Convert from LuaItemStack
		LuaItemStack *o = LuaItemStack::checkobject(L, index);
		return o->getItem();
	}
	else if(lua_isstring(L, index))
	{
		// Convert from itemstring
		std::string itemstring = lua_tostring(L, index);
		IItemDefManager *idef = srv->idef();
		try
		{
			ItemStack item;
			item.deSerialize(itemstring, idef);
			return item;
		}
		catch(SerializationError &e)
		{
			warningstream<<"unable to create item from itemstring"
					<<": "<<itemstring<<std::endl;
			return ItemStack();
		}
	}
	else if(lua_istable(L, index))
	{
		// Convert from table
		IItemDefManager *idef = srv->idef();
		std::string name = getstringfield_default(L, index, "name", "");
		int count = getintfield_default(L, index, "count", 1);
		int wear = getintfield_default(L, index, "wear", 0);
		std::string metadata = getstringfield_default(L, index, "metadata", "");
		return ItemStack(name, count, wear, metadata, idef);
	}
	else
	{
		throw LuaError("Expecting itemstack, itemstring, table or nil");
	}
}

/******************************************************************************/
void push_tool_capabilities(lua_State *L,
		const ToolCapabilities &toolcap)
{
	lua_newtable(L);
	setfloatfield(L, -1, "full_punch_interval", toolcap.full_punch_interval);
		setintfield(L, -1, "max_drop_level", toolcap.max_drop_level);
		// Create groupcaps table
		lua_newtable(L);
		// For each groupcap
		for (ToolGCMap::const_iterator i = toolcap.groupcaps.begin();
			i != toolcap.groupcaps.end(); i++) {
			// Create groupcap table
			lua_newtable(L);
			const std::string &name = i->first;
			const ToolGroupCap &groupcap = i->second;
			// Create subtable "times"
			lua_newtable(L);
			for (UNORDERED_MAP<int, float>::const_iterator
					i = groupcap.times.begin(); i != groupcap.times.end(); i++) {
				lua_pushinteger(L, i->first);
				lua_pushnumber(L, i->second);
				lua_settable(L, -3);
			}
			// Set subtable "times"
			lua_setfield(L, -2, "times");
			// Set simple parameters
			setintfield(L, -1, "maxlevel", groupcap.maxlevel);
			setintfield(L, -1, "uses", groupcap.uses);
			// Insert groupcap table into groupcaps table
			lua_setfield(L, -2, name.c_str());
		}
		// Set groupcaps table
		lua_setfield(L, -2, "groupcaps");
		//Create damage_groups table
		lua_newtable(L);
		// For each damage group
		for (DamageGroup::const_iterator i = toolcap.damageGroups.begin();
			i != toolcap.damageGroups.end(); i++) {
			// Create damage group table
			lua_pushinteger(L, i->second);
			lua_setfield(L, -2, i->first.c_str());
		}
		lua_setfield(L, -2, "damage_groups");
}

/******************************************************************************/
void push_inventory_list(lua_State *L, Inventory *inv, const char *name)
{
	InventoryList *invlist = inv->getList(name);
	if(invlist == NULL){
		lua_pushnil(L);
		return;
	}
	std::vector<ItemStack> items;
	for(u32 i=0; i<invlist->getSize(); i++)
		items.push_back(invlist->getItem(i));
	push_items(L, items);
}

/******************************************************************************/
void read_inventory_list(lua_State *L, int tableindex,
		Inventory *inv, const char *name, Server* srv, int forcesize)
{
	if(tableindex < 0)
		tableindex = lua_gettop(L) + 1 + tableindex;
	// If nil, delete list
	if(lua_isnil(L, tableindex)){
		inv->deleteList(name);
		return;
	}
	// Otherwise set list
	std::vector<ItemStack> items = read_items(L, tableindex,srv);
	int listsize = (forcesize != -1) ? forcesize : items.size();
	InventoryList *invlist = inv->addList(name, listsize);
	int index = 0;
	for(std::vector<ItemStack>::const_iterator
			i = items.begin(); i != items.end(); i++){
		if(forcesize != -1 && index == forcesize)
			break;
		invlist->changeItem(index, *i);
		index++;
	}
	while(forcesize != -1 && index < forcesize){
		invlist->deleteItem(index);
		index++;
	}
}

/******************************************************************************/
ToolCapabilities read_tool_capabilities(
		lua_State *L, int table)
{
	ToolCapabilities toolcap;
	getfloatfield(L, table, "full_punch_interval", toolcap.full_punch_interval);
	getintfield(L, table, "max_drop_level", toolcap.max_drop_level);
	lua_getfield(L, table, "groupcaps");
	if(lua_istable(L, -1)){
		int table_groupcaps = lua_gettop(L);
		lua_pushnil(L);
		while(lua_next(L, table_groupcaps) != 0){
			// key at index -2 and value at index -1
			std::string groupname = luaL_checkstring(L, -2);
			if(lua_istable(L, -1)){
				int table_groupcap = lua_gettop(L);
				// This will be created
				ToolGroupCap groupcap;
				// Read simple parameters
				getintfield(L, table_groupcap, "maxlevel", groupcap.maxlevel);
				getintfield(L, table_groupcap, "uses", groupcap.uses);
				// DEPRECATED: maxwear
				float maxwear = 0;
				if (getfloatfield(L, table_groupcap, "maxwear", maxwear)){
					if (maxwear != 0)
						groupcap.uses = 1.0/maxwear;
					else
						groupcap.uses = 0;
					warningstream << "Field \"maxwear\" is deprecated; "
							<< "replace with uses=1/maxwear" << std::endl;
					infostream << script_get_backtrace(L) << std::endl;
				}
				// Read "times" table
				lua_getfield(L, table_groupcap, "times");
				if(lua_istable(L, -1)){
					int table_times = lua_gettop(L);
					lua_pushnil(L);
					while(lua_next(L, table_times) != 0){
						// key at index -2 and value at index -1
						int rating = luaL_checkinteger(L, -2);
						float time = luaL_checknumber(L, -1);
						groupcap.times[rating] = time;
						// removes value, keeps key for next iteration
						lua_pop(L, 1);
					}
				}
				lua_pop(L, 1);
				// Insert groupcap into toolcap
				toolcap.groupcaps[groupname] = groupcap;
			}
			// removes value, keeps key for next iteration
			lua_pop(L, 1);
		}
	}
	lua_pop(L, 1);

	lua_getfield(L, table, "damage_groups");
	if(lua_istable(L, -1)){
		int table_damage_groups = lua_gettop(L);
		lua_pushnil(L);
		while(lua_next(L, table_damage_groups) != 0){
			// key at index -2 and value at index -1
			std::string groupname = luaL_checkstring(L, -2);
			u16 value = luaL_checkinteger(L, -1);
			toolcap.damageGroups[groupname] = value;
			// removes value, keeps key for next iteration
			lua_pop(L, 1);
		}
	}
	lua_pop(L, 1);
	return toolcap;
}

/******************************************************************************/
void push_dig_params(lua_State *L,const DigParams &params)
{
	lua_newtable(L);
	setboolfield(L, -1, "diggable", params.diggable);
	setfloatfield(L, -1, "time", params.time);
	setintfield(L, -1, "wear", params.wear);
}

/******************************************************************************/
void push_hit_params(lua_State *L,const HitParams &params)
{
	lua_newtable(L);
	setintfield(L, -1, "hp", params.hp);
	setintfield(L, -1, "wear", params.wear);
}

/******************************************************************************/

bool getflagsfield(lua_State *L, int table, const char *fieldname,
	FlagDesc *flagdesc, u32 *flags, u32 *flagmask)
{
	lua_getfield(L, table, fieldname);

	bool success = read_flags(L, -1, flagdesc, flags, flagmask);

	lua_pop(L, 1);

	return success;
}

bool read_flags(lua_State *L, int index, FlagDesc *flagdesc,
	u32 *flags, u32 *flagmask)
{
	if (lua_isstring(L, index)) {
		std::string flagstr = lua_tostring(L, index);
		*flags = readFlagString(flagstr, flagdesc, flagmask);
	} else if (lua_istable(L, index)) {
		*flags = read_flags_table(L, index, flagdesc, flagmask);
	} else {
		return false;
	}

	return true;
}

u32 read_flags_table(lua_State *L, int table, FlagDesc *flagdesc, u32 *flagmask)
{
	u32 flags = 0, mask = 0;
	char fnamebuf[64] = "no";

	for (int i = 0; flagdesc[i].name; i++) {
		bool result;

		if (getboolfield(L, table, flagdesc[i].name, result)) {
			mask |= flagdesc[i].flag;
			if (result)
				flags |= flagdesc[i].flag;
		}

		strlcpy(fnamebuf + 2, flagdesc[i].name, sizeof(fnamebuf) - 2);
		if (getboolfield(L, table, fnamebuf, result))
			mask |= flagdesc[i].flag;
	}

	if (flagmask)
		*flagmask = mask;

	return flags;
}

void push_flags_string(lua_State *L, FlagDesc *flagdesc, u32 flags, u32 flagmask)
{
	std::string flagstring = writeFlagString(flags, flagdesc, flagmask);
	lua_pushlstring(L, flagstring.c_str(), flagstring.size());
}

/******************************************************************************/
/* Lua Stored data!                                                           */
/******************************************************************************/

/******************************************************************************/
void read_groups(lua_State *L, int index, ItemGroupList &result)
{
	if (!lua_istable(L,index))
		return;
	result.clear();
	lua_pushnil(L);
	if(index < 0)
		index -= 1;
	while(lua_next(L, index) != 0){
		// key at index -2 and value at index -1
		std::string name = luaL_checkstring(L, -2);
		int rating = luaL_checkinteger(L, -1);
		result[name] = rating;
		// removes value, keeps key for next iteration
		lua_pop(L, 1);
	}
}

/******************************************************************************/
void push_groups(lua_State *L, const ItemGroupList &groups)
{
	lua_newtable(L);
	for (ItemGroupList::const_iterator it = groups.begin(); it != groups.end(); ++it) {
		lua_pushnumber(L, it->second);
		lua_setfield(L, -2, it->first.c_str());
	}
}

/******************************************************************************/
void push_items(lua_State *L, const std::vector<ItemStack> &items)
{
	lua_createtable(L, items.size(), 0);
	for (u32 i = 0; i != items.size(); i++) {
		LuaItemStack::create(L, items[i]);
		lua_rawseti(L, -2, i + 1);
	}
}

/******************************************************************************/
std::vector<ItemStack> read_items(lua_State *L, int index, Server *srv)
{
	if(index < 0)
		index = lua_gettop(L) + 1 + index;

	std::vector<ItemStack> items;
	luaL_checktype(L, index, LUA_TTABLE);
	lua_pushnil(L);
	while (lua_next(L, index)) {
		s32 key = luaL_checkinteger(L, -2);
		if (key < 1) {
			throw LuaError("Invalid inventory list index");
		}
		if (items.size() < (u32) key) {
			items.resize(key);
		}
		items[key - 1] = read_item(L, -1, srv);
		lua_pop(L, 1);
	}
	return items;
}

/******************************************************************************/
void luaentity_get(lua_State *L, u16 id)
{
	// Get luaentities[i]
	lua_getglobal(L, "core");
	lua_getfield(L, -1, "luaentities");
	luaL_checktype(L, -1, LUA_TTABLE);
	lua_pushnumber(L, id);
	lua_gettable(L, -2);
	lua_remove(L, -2); // Remove luaentities
	lua_remove(L, -2); // Remove core
}

/******************************************************************************/
bool read_noiseparams(lua_State *L, int index, NoiseParams *np)
{
	if (index < 0)
		index = lua_gettop(L) + 1 + index;

	if (!lua_istable(L, index))
		return false;

	getfloatfield(L, index, "offset",      np->offset);
	getfloatfield(L, index, "scale",       np->scale);
	getfloatfield(L, index, "persist",     np->persist);
	getfloatfield(L, index, "persistence", np->persist);
	getfloatfield(L, index, "lacunarity",  np->lacunarity);
	getintfield(L,   index, "seed",        np->seed);
	getintfield(L,   index, "octaves",     np->octaves);

	u32 flags    = 0;
	u32 flagmask = 0;
	np->flags = getflagsfield(L, index, "flags", flagdesc_noiseparams,
		&flags, &flagmask) ? flags : NOISE_FLAG_DEFAULTS;

	lua_getfield(L, index, "spread");
	np->spread  = read_v3f(L, -1);
	lua_pop(L, 1);

	return true;
}

void push_noiseparams(lua_State *L, NoiseParams *np)
{
	lua_newtable(L);
	lua_pushnumber(L, np->offset);
	lua_setfield(L, -2, "offset");
	lua_pushnumber(L, np->scale);
	lua_setfield(L, -2, "scale");
	lua_pushnumber(L, np->persist);
	lua_setfield(L, -2, "persistence");
	lua_pushnumber(L, np->lacunarity);
	lua_setfield(L, -2, "lacunarity");
	lua_pushnumber(L, np->seed);
	lua_setfield(L, -2, "seed");
	lua_pushnumber(L, np->octaves);
	lua_setfield(L, -2, "octaves");

	push_flags_string(L, flagdesc_noiseparams, np->flags,
		np->flags);
	lua_setfield(L, -2, "flags");

	push_v3f(L, np->spread);
	lua_setfield(L, -2, "spread");
}

/******************************************************************************/
// Returns depth of json value tree
static int push_json_value_getdepth(const Json::Value &value)
{
	if (!value.isArray() && !value.isObject())
		return 1;

	int maxdepth = 0;
	for (Json::Value::const_iterator it = value.begin();
			it != value.end(); ++it) {
		int elemdepth = push_json_value_getdepth(*it);
		if (elemdepth > maxdepth)
			maxdepth = elemdepth;
	}
	return maxdepth + 1;
}
// Recursive function to convert JSON --> Lua table
static bool push_json_value_helper(lua_State *L, const Json::Value &value,
		int nullindex)
{
	switch(value.type()) {
		case Json::nullValue:
		default:
			lua_pushvalue(L, nullindex);
			break;
		case Json::intValue:
			lua_pushinteger(L, value.asInt());
			break;
		case Json::uintValue:
			lua_pushinteger(L, value.asUInt());
			break;
		case Json::realValue:
			lua_pushnumber(L, value.asDouble());
			break;
		case Json::stringValue:
			{
				const char *str = value.asCString();
				lua_pushstring(L, str ? str : "");
			}
			break;
		case Json::booleanValue:
			lua_pushboolean(L, value.asInt());
			break;
		case Json::arrayValue:
			lua_newtable(L);
			for (Json::Value::const_iterator it = value.begin();
					it != value.end(); ++it) {
				push_json_value_helper(L, *it, nullindex);
				lua_rawseti(L, -2, it.index() + 1);
			}
			break;
		case Json::objectValue:
			lua_newtable(L);
			for (Json::Value::const_iterator it = value.begin();
					it != value.end(); ++it) {
#ifndef JSONCPP_STRING
				const char *str = it.memberName();
				lua_pushstring(L, str ? str : "");
#else
				std::string str = it.name();
				lua_pushstring(L, str.c_str());
#endif
				push_json_value_helper(L, *it, nullindex);
				lua_rawset(L, -3);
			}
			break;
	}
	return true;
}
// converts JSON --> Lua table; returns false if lua stack limit exceeded
// nullindex: Lua stack index of value to use in place of JSON null
bool push_json_value(lua_State *L, const Json::Value &value, int nullindex)
{
	if(nullindex < 0)
		nullindex = lua_gettop(L) + 1 + nullindex;

	int depth = push_json_value_getdepth(value);

	// The maximum number of Lua stack slots used at each recursion level
	// of push_json_value_helper is 2, so make sure there a depth * 2 slots
	if (lua_checkstack(L, depth * 2))
		return push_json_value_helper(L, value, nullindex);
	else
		return false;
}

// Converts Lua table --> JSON
void read_json_value(lua_State *L, Json::Value &root, int index, u8 recursion)
{
	if (recursion > 16) {
		throw SerializationError("Maximum recursion depth exceeded");
	}
	int type = lua_type(L, index);
	if (type == LUA_TBOOLEAN) {
		root = (bool) lua_toboolean(L, index);
	} else if (type == LUA_TNUMBER) {
		root = lua_tonumber(L, index);
	} else if (type == LUA_TSTRING) {
		size_t len;
		const char *str = lua_tolstring(L, index, &len);
		root = std::string(str, len);
	} else if (type == LUA_TTABLE) {
		lua_pushnil(L);
		while (lua_next(L, index)) {
			// Key is at -2 and value is at -1
			Json::Value value;
			read_json_value(L, value, lua_gettop(L), recursion + 1);

			Json::ValueType roottype = root.type();
			int keytype = lua_type(L, -1);
			if (keytype == LUA_TNUMBER) {
				lua_Number key = lua_tonumber(L, -1);
				if (roottype != Json::nullValue && roottype != Json::arrayValue) {
					throw SerializationError("Can't mix array and object values in JSON");
				} else if (key < 1) {
					throw SerializationError("Can't use zero-based or negative indexes in JSON");
				} else if (floor(key) != key) {
					throw SerializationError("Can't use indexes with a fractional part in JSON");
				}
				root[(Json::ArrayIndex) key - 1] = value;
			} else if (keytype == LUA_TSTRING) {
				if (roottype != Json::nullValue && roottype != Json::objectValue) {
					throw SerializationError("Can't mix array and object values in JSON");
				}
				root[lua_tostring(L, -1)] = value;
			} else {
				throw SerializationError("Lua key to convert to JSON is not a string or number");
			}
		}
	} else if (type == LUA_TNIL) {
		root = Json::nullValue;
	} else {
		throw SerializationError("Can only store booleans, numbers, strings, objects, arrays, and null in JSON");
	}
	lua_pop(L, 1); // Pop value
}