builtin/mainmenu/init.lua


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160

--Minetest
--Copyright (C) 2014 sapier
--
--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.

mt_color_grey  = "#AAAAAA"
mt_color_blue  = "#6389FF"
mt_color_green = "#72FF63"
mt_color_dark_green = "#25C191"

--for all other colors ask sfan5 to complete his work!

local menupath = core.get_mainmenu_path()
local basepath = core.get_builtin_path()
local menustyle = core.settings:get("main_menu_style")
defaulttexturedir = core.get_texturepath_share() .. DIR_DELIM .. "base" ..
					DIR_DELIM .. "pack" .. DIR_DELIM

dofile(basepath .. "common" .. DIR_DELIM .. "async_event.lua")
dofile(basepath .. "common" .. DIR_DELIM .. "filterlist.lua")
dofile(basepath .. "fstk" .. DIR_DELIM .. "buttonbar.lua")
dofile(basepath .. "fstk" .. DIR_DELIM .. "dialog.lua")
dofile(basepath .. "fstk" .. DIR_DELIM .. "tabview.lua")
dofile(basepath .. "fstk" .. DIR_DELIM .. "ui.lua")
dofile(menupath .. DIR_DELIM .. "common.lua")
dofile(menupath .. DIR_DELIM .. "pkgmgr.lua")
dofile(menupath .. DIR_DELIM .. "textures.lua")

dofile(menupath .. DIR_DELIM .. "dlg_config_world.lua")
dofile(menupath .. DIR_DELIM .. "dlg_settings_advanced.lua")
dofile(menupath .. DIR_DELIM .. "dlg_contentstore.lua")
if menustyle ~= "simple" then
	dofile(menupath .. DIR_DELIM .. "dlg_create_world.lua")
	dofile(menupath .. DIR_DELIM .. "dlg_delete_content.lua")
	dofile(menupath .. DIR_DELIM .. "dlg_delete_world.lua")
	dofile(menupath .. DIR_DELIM .. "dlg_rename_modpack.lua")
end

local tabs = {}

tabs.settings = dofile(menupath .. DIR_DELIM .. "tab_settings.lua")
tabs.content  = dofile(menupath .. DIR_DELIM .. "tab_content.lua")
tabs.credits  = dofile(menupath .. DIR_DELIM .. "tab_credits.lua")
if menustyle == "simple" then
	tabs.simple_main = dofile(menupath .. DIR_DELIM .. "tab_simple_main.lua")
else
	tabs.local_game = dofile(menupath .. DIR_DELIM .. "tab_local.lua")
	tabs.play_online = dofile(menupath .. DIR_DELIM .. "tab_online.lua")
end

--------------------------------------------------------------------------------
local function main_event_handler(tabview, event)
	if event == "MenuQuit" then
		core.close()
	end
	return true
end

--------------------------------------------------------------------------------
local function init_globals()
	-- Init gamedata
	gamedata.worldindex = 0

	if menustyle == "simple" then
		local world_list = core.get_worlds()
		local world_index

		local found_singleplayerworld = false
		for i, world in ipairs(world_list) do
			if world.name == "singleplayerworld" then
				found_singleplayerworld = true
				world_index = i
				break
			end
		end

		if not found_singleplayerworld then
			core.create_world("singleplayerworld", 1)

			world_list = core.get_worlds()

			for i, world in ipairs(world_list) do
				if world.name == "singleplayerworld" then
					world_index = i
					break
				end
			end
		end

		gamedata.worldindex = world_index
	else
		menudata.worldlist = filterlist.create(
			core.get_worlds,
			compare_worlds,
			-- Unique id comparison function
			function(element, uid)
				return element.name == uid
			end,
			-- Filter function
			function(element, gameid)
				return element.gameid == gameid
			end
		)

		menudata.worldlist:add_sort_mechanism("alphabetic", sort_worlds_alphabetic)
		menudata.worldlist:set_sortmode("alphabetic")

		if not core.settings:get("menu_last_game") then
			local default_game = core.settings:get("default_game") or "minetest"
			core.settings:set("menu_last_game", default_game)
		end

		mm_texture.init()
	end

	-- Create main tabview
	local tv_main = tabview_create("maintab", {x = 12, y = 5.4}, {x = 0, y = 0})

	if menustyle == "simple" then
		tv_main:add(tabs.simple_main)
	else
		tv_main:set_autosave_tab(true)
		tv_main:add(tabs.local_game)
		tv_main:add(tabs.play_online)
	end

	tv_main:add(tabs.content)
	tv_main:add(tabs.settings)
	tv_main:add(tabs.credits)

	tv_main:set_global_event_handler(main_event_handler)
	tv_main:set_fixed_size(false)

	if menustyle ~= "simple" then
		local last_tab = core.settings:get("maintab_LAST")
		if last_tab and tv_main.current_tab ~= last_tab then
			tv_main:set_tab(last_tab)
		end
	end
	ui.set_default("maintab")
	tv_main:show()

	ui.update()

	core.sound_play("main_menu", true)
end

init_globals()
/*
** $Id: lapi.c,v 2.55.1.5 2008/07/04 18:41:18 roberto Exp $
** Lua API
** See Copyright Notice in lua.h
*/


#include <assert.h>
#include <math.h>
#include <stdarg.h>
#include <string.h>

#define lapi_c
#define LUA_CORE

#include "lua.h"

#include "lapi.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
#include "lundump.h"
#include "lvm.h"


const char lua_ident[] =
  "$Lua: " LUA_RELEASE " " LUA_COPYRIGHT " $\n"
  "$Authors: " LUA_AUTHORS " $\n"
  "$URL: www.lua.org $\n";


#define api_checknelems(L, n)	api_check(L, (n) <= (L->top - L->base))

#define api_checkvalidindex(L, i)	api_check(L, (i) != luaO_nilobject)

#define api_incr_top(L)   {api_check(L, L->top < L->ci->top); L->top++;}


static TValue *index2adr (lua_State *L, int idx) {
  if (idx > 0) {
    TValue *o = L->base + (idx - 1);
    api_check(L, idx <= L->ci->top - L->base);
    if (o >= L->top) return cast(TValue *, luaO_nilobject);
    else return o;
  }
  else if (idx > LUA_REGISTRYINDEX) {
    api_check(L, idx != 0 && -idx <= L->top - L->base);
    return L->top + idx;
  }
  else switch (idx) {  /* pseudo-indices */
    case LUA_REGISTRYINDEX: return registry(L);
    case LUA_ENVIRONINDEX: {
      Closure *func = curr_func(L);
      sethvalue(L, &L->env, func->c.env);
      return &L->env;
    }
    case LUA_GLOBALSINDEX: return gt(L);
    default: {
      Closure *func = curr_func(L);
      idx = LUA_GLOBALSINDEX - idx;
      return (idx <= func->c.nupvalues)
                ? &func->c.upvalue[idx-1]
                : cast(TValue *, luaO_nilobject);
    }
  }
}


static Table *getcurrenv (lua_State *L) {
  if (L->ci == L->base_ci)  /* no enclosing function? */
    return hvalue(gt(L));  /* use global table as environment */
  else {
    Closure *func = curr_func(L);
    return func->c.env;
  }
}


void luaA_pushobject (lua_State *L, const TValue *o) {
  setobj2s(L, L->top, o);
  api_incr_top(L);
}


LUA_API int lua_checkstack (lua_State *L, int size) {
  int res = 1;
  lua_lock(L);
  if (size > LUAI_MAXCSTACK || (L->top - L->base + size) > LUAI_MAXCSTACK)
    res = 0;  /* stack overflow */
  else if (size > 0) {
    luaD_checkstack(L, size);
    if (L->ci->top < L->top + size)
      L->ci->top = L->top + size;
  }
  lua_unlock(L);
  return res;
}


LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) {
  int i;
  if (from == to) return;
  lua_lock(to);
  api_checknelems(from, n);
  api_check(from, G(from) == G(to));
  api_check(from, to->ci->top - to->top >= n);
  from->top -= n;
  for (i = 0; i < n; i++) {
    setobj2s(to, to->top++, from->top + i);
  }
  lua_unlock(to);
}


LUA_API void lua_setlevel (lua_State *from, lua_State *to) {
  to->nCcalls = from->nCcalls;
}


LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf) {
  lua_CFunction old;
  lua_lock(L);
  old = G(L)->panic;
  G(L)->panic = panicf;
  lua_unlock(L);
  return old;
}


LUA_API lua_State *lua_newthread (lua_State *L) {
  lua_State *L1;
  lua_lock(L);
  luaC_checkGC(L);
  L1 = luaE_newthread(L);
  setthvalue(L, L->top, L1);
  api_incr_top(L);
  lua_unlock(L);
  luai_userstatethread(L, L1);
  return L1;
}


/*
** basic stack manipulation
*/


LUA_API int lua_gettop (lua_State *L) {
  return cast_int(L->top - L->base);
}


LUA_API void lua_settop (lua_State *L, int idx) {
  lua_lock(L);
  if (idx >= 0) {
    api_check(L, idx <= L->stack_last - L->base);
    while (L->top < L->base + idx)
      setnilvalue(L->top++);
    L->top = L->base + idx;
  }
  else {
    api_check(L, -(idx+1) <= (L->top - L->base));
    L->top += idx+1;  /* `subtract' index (index is negative) */
  }
  lua_unlock(L);
}


LUA_API void lua_remove (lua_State *L, int idx) {
  StkId p;
  lua_lock(L);
  p = index2adr(L, idx);
  api_checkvalidindex(L, p);
  while (++p < L->top) setobjs2s(L, p-1, p);
  L->top--;
  lua_unlock(L);
}


LUA_API void lua_insert (lua_State *L, int idx) {
  StkId p;
  StkId q;
  lua_lock(L);
  p = index2adr(L, idx);
  api_checkvalidindex(L, p);
  for (q = L->top; q>p; q--) setobjs2s(L, q, q-1);
  setobjs2s(L, p, L->top);
  lua_unlock(L);
}


LUA_API void lua_replace (lua_State *L, int idx) {
  StkId o;
  lua_lock(L);
  /* explicit test for incompatible code */
  if (idx == LUA_ENVIRONINDEX && L->ci == L->base_ci)
    luaG_runerror(L, "no calling environment");
  api_checknelems(L, 1);
  o = index2adr(L, idx);
  api_checkvalidindex(L, o);
  if (idx == LUA_ENVIRONINDEX) {
    Closure *func = curr_func(L);
    api_check(L, ttistable(L->top - 1)); 
    func->c.env = hvalue(L->top - 1);
    luaC_barrier(L, func, L->top - 1);
  }
  else {
    setobj(L, o, L->top - 1);
    if (idx < LUA_GLOBALSINDEX)  /* function upvalue? */
      luaC_barrier(L, curr_func(L), L->top - 1);
  }
  L->top--;
  lua_unlock(L);
}


LUA_API void lua_pushvalue (lua_State *L, int idx) {
  lua_lock(L);
  setobj2s(L, L->top, index2adr(L, idx));
  api_incr_top(L);
  lua_unlock(L);
}


/*
** access functions (stack -> C)
*/


LUA_API int lua_type (lua_State *L, int idx) {
  StkId o = index2adr(L, idx);
  return (o == luaO_nilobject) ? LUA_TNONE : ttype(o);
}


LUA_API const char *lua_typename (lua_State *L, int t) {
  UNUSED(L);
  return (t == LUA_TNONE) ? "no value" : luaT_typenames[t];
}


LUA_API int lua_iscfunction (lua_State *L, int idx) {
  StkId o = index2adr(L, idx);
  return iscfunction(o);
}


LUA_API int lua_isnumber (lua_State *L, int idx) {
  TValue n;
  const TValue *o = index2adr(L, idx);
  return tonumber(o, &n);
}


LUA_API int lua_isstring (lua_State *L, int idx) {
  int t = lua_type(L, idx);
  return (t == LUA_TSTRING || t == LUA_TNUMBER);
}


LUA_API int lua_isuserdata (lua_State *L, int idx) {
  const TValue *o = index2adr(L, idx);
  return (ttisuserdata(o) || ttislightuserdata(o));
}


LUA_API int lua_rawequal (lua_State *L, int index1, int index2) {
  StkId o1 = index2adr(L, index1);
  StkId o2 = index2adr(L, index2);
  return (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0
         : luaO_rawequalObj(o1, o2);
}


LUA_API int lua_equal (lua_State *L, int index1, int index2) {
  StkId o1, o2;
  int i;
  lua_lock(L);  /* may call tag method */
  o1 = index2adr(L, index1);
  o2 = index2adr(L, index2);
  i = (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0 : equalobj(L, o1, o2);
  lua_unlock(L);
  return i;
}


LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {
  StkId o1, o2;
  int i;
  lua_lock(L);  /* may call tag method */
  o1 = index2adr(L, index1);
  o2 = index2adr(L, index2);
  i = (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0
       : luaV_lessthan(L, o1, o2);
  lua_unlock(L);
  return i;
}


LUA_API lua_Number lua_tonumber (lua_State *L, int idx) {
  TValue n;
  const TValue *o = index2adr(L, idx);
  if (tonumber(o, &n))
    return nvalue(o);
  else
    return 0;
}


LUA_API lua_Integer lua_tointeger (lua_State *L, int idx) {
  TValue n;
  const TValue *o = index2adr(L, idx);
  if (tonumber(o, &n)) {
    lua_Integer res;
    lua_Number num = nvalue(o);
    lua_number2integer(res, num);
    return res;
  }
  else
    return 0;
}


LUA_API int lua_toboolean (lua_State *L, int idx) {
  const TValue *o = index2adr(L, idx);
  return !l_isfalse(o);
}


LUA_API const char *lua_tolstring (lua_State *L, int idx, size_t *len) {
  StkId o = index2adr(L, idx);
  if (!ttisstring(o)) {
    lua_lock(L);  /* `luaV_tostring' may create a new string */
    if (!luaV_tostring(L, o)) {  /* conversion failed? */
      if (len != NULL) *len = 0;
      lua_unlock(L);
      return NULL;
    }
    luaC_checkGC(L);
    o = index2adr(L, idx);  /* previous call may reallocate the stack */
    lua_unlock(L);
  }
  if (len != NULL) *len = tsvalue(o)->len;
  return svalue(o);
}


LUA_API size_t lua_objlen (lua_State *L, int idx) {
  StkId o = index2adr(L, idx);
  switch (ttype(o)) {
    case LUA_TSTRING: return tsvalue(o)->len;
    case LUA_TUSERDATA: return uvalue(o)->len;
    case LUA_TTABLE: return luaH_getn(hvalue(o));
    case LUA_TNUMBER: {
      size_t l;
      lua_lock(L);  /* `luaV_tostring' may create a new string */
      l = (luaV_tostring(L, o) ? tsvalue(o)->len : 0);
      lua_unlock(L);
      return l;
    }
    default: return 0;
  }
}


LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) {
  StkId o = index2adr(L, idx);
  return (!iscfunction(o)) ? NULL : clvalue(o)->c.f;
}


LUA_API void *lua_touserdata (lua_State *L, int idx) {
  StkId o = index2adr(L, idx);
  switch (ttype(o)) {
    case LUA_TUSERDATA: return (rawuvalue(o) + 1);
    case LUA_TLIGHTUSERDATA: return pvalue(o);
    default: return NULL;
  }
}


LUA_API lua_State *lua_tothread (lua_State *L, int idx) {
  StkId o = index2adr(L, idx);
  return (!ttisthread(o)) ? NULL : thvalue(o);
}


LUA_API const void *lua_topointer (lua_State *L, int idx) {
  StkId o = index2adr(L, idx);
  switch (ttype(o)) {
    case LUA_TTABLE: return hvalue(o);
    case LUA_TFUNCTION: return clvalue(o);
    case LUA_TTHREAD: return thvalue(o);
    case LUA_TUSERDATA:
    case LUA_TLIGHTUSERDATA:
      return lua_touserdata(L, idx);
    default: return NULL;
  }
}


/*
** push functions (C -> stack)
*/


LUA_API void lua_pushnil (lua_State *L) {
  lua_lock(L);
  setnilvalue(L->top);
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API void lua_pushnumber (lua_State *L, lua_Number n) {
  lua_lock(L);
  setnvalue(L->top, n);
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) {
  lua_lock(L);
  setnvalue(L->top, cast_num(n));
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) {
  lua_lock(L);
  luaC_checkGC(L);
  setsvalue2s(L, L->top, luaS_newlstr(L, s, len));
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API void lua_pushstring (lua_State *L, const char *s) {
  if (s == NULL)
    lua_pushnil(L);
  else
    lua_pushlstring(L, s, strlen(s));
}


LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt,
                                      va_list argp) {
  const char *ret;
  lua_lock(L);
  luaC_checkGC(L);
  ret = luaO_pushvfstring(L, fmt, argp);
  lua_unlock(L);
  return ret;
}


LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) {
  const char *ret;
  va_list argp;
  lua_lock(L);
  luaC_checkGC(L);
  va_start(argp, fmt);
  ret = luaO_pushvfstring(L, fmt, argp);
  va_end(argp);
  lua_unlock(L);
  return ret;
}


LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
  Closure *cl;
  lua_lock(L);
  luaC_checkGC(L);
  api_checknelems(L, n);
  cl = luaF_newCclosure(L, n, getcurrenv(L));
  cl->c.f = fn;
  L->top -= n;
  while (n--)
    setobj2n(L, &cl->c.upvalue[n], L->top+n);
  setclvalue(L, L->top, cl);
  lua_assert(iswhite(obj2gco(cl)));
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API void lua_pushboolean (lua_State *L, int b) {
  lua_lock(L);
  setbvalue(L->top, (b != 0));  /* ensure that true is 1 */
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API void lua_pushlightuserdata (lua_State *L, void *p) {
  lua_lock(L);
  setpvalue(L->top, p);
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API int lua_pushthread (lua_State *L) {
  lua_lock(L);
  setthvalue(L, L->top, L);
  api_incr_top(L);
  lua_unlock(L);
  return (G(L)->mainthread == L);
}


/*
** get functions (Lua -> stack)
*/


LUA_API void lua_gettable (lua_State *L, int idx) {
  StkId t;
  lua_lock(L);
  t = index2adr(L, idx);
  api_checkvalidindex(L, t);
  luaV_gettable(L, t, L->top - 1, L->top - 1);
  lua_unlock(L);
}


LUA_API void lua_getfield (lua_State *L, int idx, const char *k) {
  StkId t;
  TValue key;
  lua_lock(L);
  t = index2adr(L, idx);
  api_checkvalidindex(L, t);
  setsvalue(L, &key, luaS_new(L, k));
  luaV_gettable(L, t, &key, L->top);
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API void lua_rawget (lua_State *L, int idx) {
  StkId t;
  lua_lock(L);
  t = index2adr(L, idx);
  api_check(L, ttistable(t));
  setobj2s(L, L->top - 1, luaH_get(hvalue(t), L->top - 1));
  lua_unlock(L);
}


LUA_API void lua_rawgeti (lua_State *L, int idx, int n) {
  StkId o;
  lua_lock(L);
  o = index2adr(L, idx);
  api_check(L, ttistable(o));
  setobj2s(L, L->top, luaH_getnum(hvalue(o), n));
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API void lua_createtable (lua_State *L, int narray, int nrec) {
  lua_lock(L);
  luaC_checkGC(L);
  sethvalue(L, L->top, luaH_new(L, narray, nrec));
  api_incr_top(L);
  lua_unlock(L);
}


LUA_API int lua_getmetatable (lua_State *L, int objindex) {
  const TValue *obj;
  Table *mt = NULL;
  int res;
  lua_lock(L);
  obj = index2adr(L, objindex);
  switch (ttype(obj)) {
    case LUA_TTABLE:
      mt = hvalue(obj)->metatable;
      break;
    case LUA_TUSERDATA:
      mt = uvalue(obj)->metatable;
      break;
    default:
      mt = G(L)->mt[ttype(obj)];
      break;
  }
  if (mt == NULL)
    res = 0;
  else {
    sethvalue(L, L->top, mt);
    api_incr_top(L);
    res = 1;
  }
  lua_unlock(L);
  return res;
}


LUA_API void lua_getfenv (lua_State *L, int idx) {
  StkId o;
  lua_lock(L);
  o = index2adr(L, idx);
  api_checkvalidindex(L, o);
  switch (ttype(o)) {
    case LUA_TFUNCTION:
      sethvalue(L, L->top, clvalue(o)->c.env);
      break;
    case LUA_TUSERDATA:
      sethvalue(L, L->top, uvalue(o)->env);
      break;
    case LUA_TTHREAD:
      setobj2s(L, L->top,  gt(thvalue(o)));
      break;
    default:
      setnilvalue(L->top);
      break;
  }
  api_incr_top(L);
  lua_unlock(L);
}


/*
** set functions (stack -> Lua)
*/


LUA_API void lua_settable (lua_State *L, int idx) {
  StkId t;
  lua_lock(L);
  api_checknelems(L, 2);
  t = index2adr(L, idx);
  api_checkvalidindex(L, t);
  luaV_settable(L, t, L->top - 2, L->top - 1);
  L->top -= 2;  /* pop index and value */
  lua_unlock(L);
}


LUA_API void lua_setfield (lua_State *L, int idx, const char *k) {
  StkId t;
  TValue key;
  lua_lock(L);
  api_checknelems(L, 1);
  t = index2adr(L, idx);
  api_checkvalidindex(L, t);
  setsvalue(L, &key, luaS_new(L, k));
  luaV_settable(L, t, &key, L->top - 1);
  L->top--;  /* pop value */
  lua_unlock(L);
}


LUA_API void lua_rawset (lua_State *L, int idx) {
  StkId t;
  lua_lock(L);
  api_checknelems(L, 2);
  t = index2adr(L, idx);
  api_check(L, ttistable(t));
  setobj2t(L, luaH_set(L, hvalue(t), L->top-2), L->top-1);
  luaC_barriert(L, hvalue(t), L->top-1);
  L->top -= 2;
  lua_unlock(L);
}


LUA_API void lua_rawseti (lua_State *L, int idx, int n) {
  StkId o;
  lua_lock(L);
  api_checknelems(L, 1);
  o = index2adr(L, idx);
  api_check(L, ttistable(o));
  setobj2t(L, luaH_setnum(L, hvalue(o), n), L->top-1);
  luaC_barriert(L, hvalue(o), L->top-1);
  L->top--;
  lua_unlock(L);
}


LUA_API int lua_setmetatable (lua_State *L, int objindex) {
  TValue *obj;
  Table *mt;
  lua_lock(L);
  api_checknelems(L, 1);
  obj = index2adr(L, objindex);
  api_checkvalidindex(L, obj);
  if (ttisnil(L->top - 1))
    mt = NULL;
  else {
    api_check(L, ttistable(L->top - 1));
    mt = hvalue(L->top - 1);
  }
  switch (ttype(obj)) {
    case LUA_TTABLE: {
      hvalue(obj)->metatable = mt;
      if (mt)
        luaC_objbarriert(L, hvalue(obj), mt);
      break;
    }
    case LUA_TUSERDATA: {
      uvalue(obj)->metatable = mt;
      if (mt)
        luaC_objbarrier(L, rawuvalue(obj), mt);
      break;
    }
    default: {
      G(L)->mt[ttype(obj)] = mt;
      break;
    }
  }
  L->top--;
  lua_unlock(L);
  return 1;
}


LUA_API int lua_setfenv (lua_State *L, int idx) {
  StkId o;
  int res = 1;
  lua_lock(L);
  api_checknelems(L, 1);
  o = index2adr(L, idx);
  api_checkvalidindex(L, o);
  api_check(L, ttistable(L->top - 1));
  switch (ttype(o)) {
    case LUA_TFUNCTION:
      clvalue(o)->c.env = hvalue(L->top - 1);
      break;
    case LUA_TUSERDATA:
      uvalue(o)->env = hvalue(L->top - 1);
      break;
    case LUA_TTHREAD:
      sethvalue(L, gt(thvalue(o)), hvalue(L->top - 1));
      break;
    default:
      res = 0;
      break;
  }
  if (res) luaC_objbarrier(L, gcvalue(o), hvalue(L->top - 1));
  L->top--;
  lua_unlock(L);
  return res;
}


/*
** `load' and `call' functions (run Lua code)
*/


#define adjustresults(L,nres) \
    { if (nres == LUA_MULTRET && L->top >= L->ci->top) L->ci->top = L->top; }


#define checkresults(L,na,nr) \
     api_check(L, (nr) == LUA_MULTRET || (L->ci->top - L->top >= (nr) - (na)))
	

LUA_API void lua_call (lua_State *L, int nargs, int nresults) {
  StkId func;
  lua_lock(L);
  api_checknelems(L, nargs+1);
  checkresults(L, nargs, nresults);
  func = L->top - (nargs+1);
  luaD_call(L, func, nresults);
  adjustresults(L, nresults);
  lua_unlock(L);
}


/*
** Execute a protected call.
*/
struct CallS {  /* data to `f_call' */
  StkId func;
  int nresults;
};


static void f_call (lua_State *L, void *ud) {
  struct CallS *c = cast(struct CallS *, ud);
  luaD_call(L, c->func, c->nresults);
}


LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc) {
  struct CallS c;
  int status;
  ptrdiff_t func;
  lua_lock(L);
  api_checknelems(L, nargs+1);
  checkresults(L, nargs, nresults);
  if (errfunc == 0)
    func = 0;
  else {
    StkId o = index2adr(L, errfunc);
    api_checkvalidindex(L, o);
    func = savestack(L, o);
  }
  c.func = L->top - (nargs+1);  /* function to be called */
  c.nresults = nresults;
  status = luaD_pcall(L, f_call, &c, savestack(L, c.func), func);
  adjustresults(L, nresults);
  lua_unlock(L);
  return status;
}


/*
** Execute a protected C call.
*/
struct CCallS {  /* data to `f_Ccall' */
  lua_CFunction func;
  void *ud;
};


static void f_Ccall (lua_State *L, void *ud) {
  struct CCallS *c = cast(struct CCallS *, ud);
  Closure *cl;
  cl = luaF_newCclosure(L, 0, getcurrenv(L));
  cl->c.f = c->func;
  setclvalue(L, L->top, cl);  /* push function */
  api_incr_top(L);
  setpvalue(L->top, c->ud);  /* push only argument */
  api_incr_top(L);
  luaD_call(L, L->top - 2, 0);
}


LUA_API int lua_cpcall (lua_State *L, lua_CFunction func, void *ud) {
  struct CCallS c;
  int status;
  lua_lock(L);
  c.func = func;
  c.ud = ud;
  status = luaD_pcall(L, f_Ccall, &c, savestack(L, L->top), 0);
  lua_unlock(L);
  return status;
}


LUA_API int lua_load (lua_State *L, lua_Reader reader, void *data,
                      const char *chunkname) {
  ZIO z;
  int status;
  lua_lock(L);
  if (!chunkname) chunkname = "?";
  luaZ_init(L, &z, reader, data);
  status = luaD_protectedparser(L, &z, chunkname);
  lua_unlock(L);
  return status;
}


LUA_API int lua_dump (lua_State *L, lua_Writer writer, void *data) {
  int status;
  TValue *o;
  lua_lock(L);
  api_checknelems(L, 1);
  o = L->top - 1;
  if (isLfunction(o))
    status = luaU_dump(L, clvalue(o)->l.p, writer, data, 0);
  else
    status = 1;
  lua_unlock(L);
  return status;
}


LUA_API int  lua_status (lua_State *L) {
  return L->status;
}


/*
** Garbage-collection function
*/

LUA_API int lua_gc (lua_State *L, int what, int data) {
  int res = 0;
  global_State *g;
  lua_lock(L);
  g = G(L);
  switch (what) {
    case LUA_GCSTOP: {
      g->GCthreshold = MAX_LUMEM;
      break;
    }
    case LUA_GCRESTART: {
      g->GCthreshold = g->totalbytes;
      break;
    }
    case LUA_GCCOLLECT: {
      luaC_fullgc(L);
      break;
    }
    case LUA_GCCOUNT: {
      /* GC values are expressed in Kbytes: #bytes/2^10 */
      res = cast_int(g->totalbytes >> 10);
      break;
    }
    case LUA_GCCOUNTB: {
      res = cast_int(g->totalbytes & 0x3ff);
      break;
    }
    case LUA_GCSTEP: {
      lu_mem a = (cast(lu_mem, data) << 10);
      if (a <= g->totalbytes)
        g->GCthreshold = g->totalbytes - a;
      else
        g->GCthreshold = 0;
      while (g->GCthreshold <= g->totalbytes) {
        luaC_step(L);
        if (g->gcstate == GCSpause) {  /* end of cycle? */
          res = 1;  /* signal it */
          break;
        }
      }
      break;
    }
    case LUA_GCSETPAUSE: {
      res = g->gcpause;
      g->gcpause = data;
      break;
    }
    case LUA_GCSETSTEPMUL: {
      res = g->gcstepmul;
      g->gcstepmul = data;
      break;
    }
    default: res = -1;  /* invalid option */
  }
  lua_unlock(L);
  return res;
}


/*
** miscellaneous functions
*/


LUA_API int lua_error (lua_State *L) {
  lua_lock(L);
  api_checknelems(L, 1);
  luaG_errormsg(L);
  lua_unlock(L);
  return 0;  /* to avoid warnings */
}


LUA_API int lua_next (lua_State *L, int idx) {
  StkId t;
  int more;
  lua_lock(L);
  t = index2adr(L, idx);
  api_check(L, ttistable(t));
  more = luaH_next(L, hvalue(t), L->top - 1);
  if (more) {
    api_incr_top(L);
  }
  else  /* no more elements */
    L->top -= 1;  /* remove key */
  lua_unlock(L);
  return more;
}


LUA_API void lua_concat (lua_State *L, int n) {
  lua_lock(L);
  api_checknelems(L, n);
  if (n >= 2) {
    luaC_checkGC(L);
    luaV_concat(L, n, cast_int(L->top - L->base) - 1);
    L->top -= (n-1);
  }
  else if (n == 0) {  /* push empty string */
    setsvalue2s(L, L->top, luaS_newlstr(L, "", 0));
    api_incr_top(L);
  }
  /* else n == 1; nothing to do */
  lua_unlock(L);
}


LUA_API lua_Alloc lua_getallocf (lua_State *L, void **ud) {
  lua_Alloc f;
  lua_lock(L);
  if (ud) *ud = G(L)->ud;
  f = G(L)->frealloc;
  lua_unlock(L);
  return f;
}


LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud) {
  lua_lock(L);
  G(L)->ud = ud;
  G(L)->frealloc = f;
  lua_unlock(L);
}


LUA_API void *lua_newuserdata (lua_State *L, size_t size) {
  Udata *u;
  lua_lock(L);
  luaC_checkGC(L);
  u = luaS_newudata(L, size, getcurrenv(L));
  setuvalue(L, L->top, u);
  api_incr_top(L);
  lua_unlock(L);
  return u + 1;
}


static const char *aux_upvalue (StkId fi, int n, TValue **val) {
  Closure *f;
  if (!ttisfunction(fi)) return NULL;
  f = clvalue(fi);