Use lua for special level files

Game is playable, and should compile on linux and Windows.
Assumes you have a lua 5.3 library available.

Removes level compiler and associated files.
Replaces special level des-files with lua scripts.
Exposes some NetHack internals to lua:
 - des-table with commands to create special levels
 - nh-table with NetHack core commands
 - nhc-table with some constants
 - u-table with some player-specific data (u-struct)
 - selection userdata

Adds some rudimentary tests.

Adds new extended command #wizloadlua to run a specific script,
and #wizloaddes to run a specific level-creation script.

nhlib.lua is loaded for every lua script.

Download and untar lua:
  mkdir lib
  cd lib
  curl -R -O http://www.lua.org/ftp/lua-5.3.5.tar.gz
  tar zxf lua-5.3.5.tar.gz

Then make nethack normally.
This commit is contained in:
Pasi Kallinen
2019-05-10 21:11:50 +03:00
parent 3e029d2900
commit fd55d9118e
189 changed files with 16653 additions and 27346 deletions

723
src/nhlsel.c Normal file
View File

@@ -0,0 +1,723 @@
/* NetHack 3.6 nhlua.c $NHDT-Date: 1524287226 2018/04/21 05:07:06 $ $NHDT-Branch: NetHack-3.6.0 $:$NHDT-Revision: 1.98 $ */
/* Copyright (c) 2018 by Pasi Kallinen */
/* NetHack may be freely redistributed. See license for details. */
#include "hack.h"
#include "sp_lev.h"
/* lua_CFunction prototypes */
STATIC_DCL int FDECL(l_selection_new, (lua_State *));
STATIC_DCL int FDECL(l_selection_clone, (lua_State *));
STATIC_DCL int FDECL(l_selection_getpoint, (lua_State *));
STATIC_DCL int FDECL(l_selection_setpoint, (lua_State *));
STATIC_DCL int FDECL(l_selection_not, (lua_State *));
STATIC_DCL int FDECL(l_selection_filter_percent, (lua_State *));
STATIC_DCL int FDECL(l_selection_rndcoord, (lua_State *));
STATIC_DCL int FDECL(l_selection_line, (lua_State *));
STATIC_DCL int FDECL(l_selection_randline, (lua_State *));
STATIC_DCL int FDECL(l_selection_rect, (lua_State *));
STATIC_DCL int FDECL(l_selection_fillrect, (lua_State *));
STATIC_DCL int FDECL(l_selection_fillrect, (lua_State *));
STATIC_DCL int FDECL(l_selection_grow, (lua_State *));
STATIC_DCL int FDECL(l_selection_filter_mapchar, (lua_State *));
STATIC_DCL int FDECL(l_selection_flood, (lua_State *));
STATIC_DCL int FDECL(l_selection_circle, (lua_State *));
STATIC_DCL int FDECL(l_selection_ellipse, (lua_State *));
STATIC_DCL int FDECL(l_selection_gradient, (lua_State *));
STATIC_DCL int FDECL(l_selection_iterate, (lua_State *));
STATIC_DCL int FDECL(l_selection_gc, (lua_State *));
STATIC_DCL int FDECL(l_selection_not, (lua_State *));
STATIC_DCL int FDECL(l_selection_and, (lua_State *));
STATIC_DCL int FDECL(l_selection_or, (lua_State *));
STATIC_DCL int FDECL(l_selection_xor, (lua_State *));
STATIC_DCL int FDECL(l_selection_not, (lua_State *));
STATIC_DCL int FDECL(l_selection_add, (lua_State *));
STATIC_DCL int FDECL(l_selection_sub, (lua_State *));
STATIC_DCL int FDECL(l_selection_ipairs, (lua_State *));
struct selectionvar *
l_selection_check(L, index)
lua_State *L;
int index;
{
struct selectionvar *sel;
luaL_checktype(L, index, LUA_TUSERDATA);
sel = (struct selectionvar *)luaL_checkudata(L, index, "selection");
if (!sel)
nhl_error(L, "Selection error");
return sel;
}
static int
l_selection_gc(L)
lua_State *L;
{
struct selectionvar *sel = l_selection_check(L, 1);
if (sel)
selection_free(sel);
return 0;
}
static struct selectionvar *
l_selection_to(L, index)
lua_State *L;
int index;
{
struct selectionvar *sel = (struct selectionvar *)lua_touserdata(L, index);
if (!sel)
nhl_error(L, "Selection error");
return sel;
}
static struct selectionvar *
l_selection_push(L)
lua_State *L;
{
struct selectionvar *tmp = selection_new();
struct selectionvar *sel = (struct selectionvar *)lua_newuserdata(L, sizeof(struct selectionvar));
luaL_getmetatable(L, "selection");
lua_setmetatable(L, -2);
sel->wid = tmp->wid;
sel->hei = tmp->hei;
sel->map = dupstr(tmp->map);
selection_free(tmp);
return sel;
}
/* local sel = selection.new(); */
static int
l_selection_new(L)
lua_State *L;
{
(void) l_selection_push(L);
return 1;
}
/* local sel = selection.clone(sel); */
static int
l_selection_clone(L)
lua_State *L;
{
struct selectionvar *sel = l_selection_check(L, 1);
struct selectionvar *tmp;
/* int x,y; */ /* REVIEW: unreferenced */
lua_pop(L, 1);
(void) l_selection_new(L);
tmp = l_selection_check(L, 1);
if (tmp->map)
free(tmp->map);
tmp->map = dupstr(sel->map);
tmp->wid = sel->wid;
tmp->hei = sel->hei;
return 1;
}
/* selection.set(sel, x, y); */
/* selection.set(sel, x, y, value); */
/* local sel = selection.set(); */
/* local sel = sel:set(); */
/* local sel = selection.set(sel); */
/* TODO: allow setting multiple coordinates at once: set({x,y}, {x,y}, ...); */
static int
l_selection_setpoint(L)
lua_State *L;
{
struct selectionvar *sel = (struct selectionvar *) 0;
/* REVIEW: initializer added */
schar x = -1, y = -1;
int val = 1;
int argc = lua_gettop(L);
long coord;
if (argc == 0) {
(void) l_selection_new(L);
} else if (argc == 1) {
sel = l_selection_check(L, 1);
} else if (argc == 2) {
x = (schar) luaL_checkinteger(L, 1);
y = (schar) luaL_checkinteger(L, 2);
lua_pop(L, 2);
(void) l_selection_new(L);
sel = l_selection_check(L, 1);
} else {
sel = l_selection_check(L, 1);
x = (schar) luaL_checkinteger(L, 2);
y = (schar) luaL_checkinteger(L, 3);
val = (int) luaL_optinteger(L, 4, 1);
}
if (!sel || !sel->map) {
nhl_error(L, "Selection setpoint error");
return 0;
}
if (x == -1 && y == -1)
coord = SP_COORD_PACK_RANDOM(0);
else
coord = SP_COORD_PACK(x,y);
get_location_coord(&x, &y, ANY_LOC, g.coder ? g.coder->croom : NULL, coord);
selection_setpoint(x, y, sel, val);
lua_settop(L, 1);
return 1;
}
/* local value = selection.get(sel, x, y); */
static int
l_selection_getpoint(L)
lua_State *L;
{
struct selectionvar *sel = l_selection_check(L, 1);
schar x = (schar) luaL_checkinteger(L, 2);
schar y = (schar) luaL_checkinteger(L, 3);
int val;
long coord;
if (x == -1 && y == -1)
coord = SP_COORD_PACK_RANDOM(0);
else
coord = SP_COORD_PACK(x,y);
get_location_coord(&x, &y, ANY_LOC, g.coder ? g.coder->croom : NULL, coord);
val = selection_getpoint(x, y, sel);
lua_settop(L, 0);
lua_pushnumber(L, val);
return 1;
}
/* local s = selection.negate(sel); */
/* local s = selection.negate(); */
static int
l_selection_not(L)
lua_State *L;
{
int argc = lua_gettop(L);
struct selectionvar *sel;
if (argc == 0)
(void) l_selection_new(L);
sel = l_selection_check(L, 1);
selection_not(sel);
lua_settop(L, 1);
return 1;
}
/* local sel = selection.area(4,5, 40,10) & selection.rect(7,8, 60,14); */
static int
l_selection_and(L)
lua_State *L;
{
int x,y;
struct selectionvar *sela = l_selection_check(L, 1);
struct selectionvar *selb = l_selection_check(L, 2);
for (x = 0; x < sela->wid; x++)
for (y = 0; y < sela->hei; y++) {
int val = selection_getpoint(x, y, sela) & selection_getpoint(x, y, selb);
selection_setpoint(x, y, sela, val);
}
lua_settop(L, 1);
return 1;
}
/* local sel = selection.area(4,5, 40,10) | selection.rect(7,8, 60,14); */
static int
l_selection_or(L)
lua_State *L;
{
int x,y;
struct selectionvar *sela = l_selection_check(L, 1);
struct selectionvar *selb = l_selection_check(L, 2);
for (x = 0; x < sela->wid; x++)
for (y = 0; y < sela->hei; y++) {
int val = selection_getpoint(x, y, sela) | selection_getpoint(x, y, selb);
selection_setpoint(x, y, sela, val);
}
lua_settop(L, 1);
return 1;
}
/* local sel = selection.area(4,5, 40,10) ~ selection.rect(7,8, 60,14); */
static int
l_selection_xor(L)
lua_State *L;
{
int x,y;
struct selectionvar *sela = l_selection_check(L, 1);
struct selectionvar *selb = l_selection_check(L, 2);
for (x = 0; x < sela->wid; x++)
for (y = 0; y < sela->hei; y++) {
int val = selection_getpoint(x, y, sela) ^ selection_getpoint(x, y, selb);
selection_setpoint(x, y, sela, val);
}
lua_settop(L, 1);
return 1;
}
/* local s = selection.percentage(sel, 50); */
static int
l_selection_filter_percent(L)
lua_State *L;
{
struct selectionvar *sel = l_selection_check(L, 1);
int p = (int) luaL_checkinteger(L, 2);
selection_filter_percent(sel, p);
lua_settop(L, 1);
return 1;
}
/* local x,y = selection.rndcoord(sel); */
/* local x,y = selection.rndcoord(sel, 1); */
static int
l_selection_rndcoord(L)
lua_State *L;
{
struct selectionvar *sel = l_selection_check(L, 1);
int removeit = (int) luaL_optinteger(L, 2, 0);
schar x, y;
selection_rndcoord(sel, &x, &y, removeit);
update_croom();
if (g.coder && g.coder->croom) {
x -= g.coder->croom->lx;
y -= g.coder->croom->ly;
} else {
x -= g.xstart;
y -= g.ystart;
}
lua_settop(L, 0);
lua_pushnumber(L, x);
lua_pushnumber(L, y);
return 2;
}
/* local s = selection.line(sel, x1,y1, x2,y2); */
/* local s = selection.line(x1,y1, x2,y2); */
/* s:line(x1,y1, x2,y2); */
static int
l_selection_line(L)
lua_State *L;
{
int argc = lua_gettop(L);
struct selectionvar *sel;
schar x1;
schar y1;
schar x2;
schar y2;
if (argc == 4) {
(void) l_selection_new(L);
x1 = (schar) luaL_checkinteger(L, 1);
y1 = (schar) luaL_checkinteger(L, 2);
x2 = (schar) luaL_checkinteger(L, 3);
y2 = (schar) luaL_checkinteger(L, 4);
sel = l_selection_check(L, 5);
lua_remove(L, 1);
lua_remove(L, 1);
lua_remove(L, 1);
lua_remove(L, 1);
} else {
sel = l_selection_check(L, 1);
x1 = (schar) luaL_checkinteger(L, 2);
y1 = (schar) luaL_checkinteger(L, 3);
x2 = (schar) luaL_checkinteger(L, 4);
y2 = (schar) luaL_checkinteger(L, 5);
}
get_location_coord(&x1, &y1, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x1,y1));
get_location_coord(&x2, &y2, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x2,y2));
selection_do_line(x1,y1,x2,y2, sel);
lua_settop(L, 1);
return 1;
}
/* local s = selection.rect(sel, x1,y1, x2,y2); */
static int
l_selection_rect(L)
lua_State *L;
{
int argc = lua_gettop(L);
struct selectionvar *sel;
schar x1;
schar y1;
schar x2;
schar y2;
if (argc == 4) {
(void) l_selection_new(L);
x1 = (schar) luaL_checkinteger(L, 1);
y1 = (schar) luaL_checkinteger(L, 2);
x2 = (schar) luaL_checkinteger(L, 3);
y2 = (schar) luaL_checkinteger(L, 4);
sel = l_selection_check(L, 5);
lua_remove(L, 1);
lua_remove(L, 1);
lua_remove(L, 1);
lua_remove(L, 1);
} else {
sel = l_selection_check(L, 1);
x1 = (schar) luaL_checkinteger(L, 2);
y1 = (schar) luaL_checkinteger(L, 3);
x2 = (schar) luaL_checkinteger(L, 4);
y2 = (schar) luaL_checkinteger(L, 5);
}
get_location_coord(&x1, &y1, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x1,y1));
get_location_coord(&x2, &y2, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x2,y2));
selection_do_line(x1,y1,x2,y1, sel);
selection_do_line(x1,y1,x1,y2, sel);
selection_do_line(x2,y1,x2,y2, sel);
selection_do_line(x1,y2,x2,y2, sel);
lua_settop(L, 1);
return 1;
}
/* local s = selection.fillrect(sel, x1,y1, x2,y2); */
/* local s = selection.fillrect(x1,y1, x2,y2); */
/* s:fillrect(x1,y1, x2,y2); */
/* selection.area(x1,y1, x2,y2); */
static int
l_selection_fillrect(L)
lua_State *L;
{
int argc = lua_gettop(L);
struct selectionvar *sel;
int y;
schar x1;
schar y1;
schar x2;
schar y2;
if (argc == 4) {
(void) l_selection_new(L);
x1 = (schar) luaL_checkinteger(L, 1);
y1 = (schar) luaL_checkinteger(L, 2);
x2 = (schar) luaL_checkinteger(L, 3);
y2 = (schar) luaL_checkinteger(L, 4);
sel = l_selection_check(L, 5);
lua_remove(L, 1);
lua_remove(L, 1);
lua_remove(L, 1);
lua_remove(L, 1);
} else {
sel = l_selection_check(L, 1);
x1 = (schar) luaL_checkinteger(L, 2);
y1 = (schar) luaL_checkinteger(L, 3);
x2 = (schar) luaL_checkinteger(L, 4);
y2 = (schar) luaL_checkinteger(L, 5);
}
get_location_coord(&x1, &y1, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x1,y1));
get_location_coord(&x2, &y2, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x2,y2));
if (x1 == x2) {
for (y = y1; y <= y2; y++)
selection_setpoint(x1, y, sel, 1);
} else {
for (y = y1; y <= y2; y++)
selection_do_line(x1,y,x2,y, sel);
}
lua_settop(L, 1);
return 1;
}
/* local s = selection.randline(sel, x1,y1, x2,y2, roughness); */
/* local s = selection.randline(x1,y1, x2,y2, roughness); */
/* TODO: selection.randline(x1,y1, x2,y2, roughness); */
/* TODO: selection.randline({x1,y1}, {x2,y2}, roughness); */
static int
l_selection_randline(L)
lua_State *L;
{
int argc = lua_gettop(L);
struct selectionvar *sel = (struct selectionvar *) 0;
/* REVIEW: initializer added */
schar x1, y1, x2, y2;
int roughness = 7;
if (argc == 6) {
sel = l_selection_check(L, 1);
x1 = (schar) luaL_checkinteger(L, 2);
y1 = (schar) luaL_checkinteger(L, 3);
x2 = (schar) luaL_checkinteger(L, 4);
y2 = (schar) luaL_checkinteger(L, 5);
roughness = (int) luaL_checkinteger(L, 6);
} else if (argc == 5 && lua_type(L, 1) == LUA_TNUMBER) {
x1 = (schar) luaL_checkinteger(L, 1);
y1 = (schar) luaL_checkinteger(L, 2);
x2 = (schar) luaL_checkinteger(L, 3);
y2 = (schar) luaL_checkinteger(L, 4);
roughness = (int) luaL_checkinteger(L, 5);
lua_pop(L, 5);
(void) l_selection_new(L);
sel = l_selection_check(L, 1);
}
get_location_coord(&x1, &y1, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x1,y1));
get_location_coord(&x2, &y2, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x2,y2));
selection_do_randline(x1,y1, x2,y2, roughness, 12, sel);
lua_settop(L, 1);
return 1;
}
/* local s = selection.grow(sel); */
/* local s = selection.grow(sel, "north"); */
static int
l_selection_grow(L)
lua_State *L;
{
const char *const growdirs[] = { "all", "random", "north", "west", "east", "south", NULL };
const int growdirs2i[] = { W_ANY, -1, W_NORTH, W_WEST, W_EAST, W_SOUTH, 0 };
struct selectionvar *sel = l_selection_check(L, 1);
int dir = growdirs2i[luaL_checkoption(L, 2, "all", growdirs)];
selection_do_grow(sel, dir);
lua_settop(L, 1);
return 1;
}
/* local s = selection.filter_mapchar(sel, mapchar, lit); */
static int
l_selection_filter_mapchar(L)
lua_State *L;
{
struct selectionvar *sel = l_selection_check(L, 1);
char *mapchr = dupstr(luaL_checkstring(L, 2));
xchar typ = check_mapchr(mapchr);
int lit = (int) luaL_optinteger(L, 3, -2); /* TODO: special lit values */
struct selectionvar *tmp = selection_filter_mapchar(sel, typ, lit);
if (typ == INVALID_TYPE)
nhl_error(L, "Erroneous map char");
if (sel->map)
free(sel->map);
sel->map = tmp->map;
if (tmp)
free(tmp);
if (mapchr)
free(mapchr);
lua_settop(L, 1);
return 1;
}
/* local s = selection.floodfill(sel, x, y); */
/* local s = selection.floodfill(x,y); */
static int
l_selection_flood(L)
lua_State *L;
{
int argc = lua_gettop(L);
struct selectionvar *sel = (struct selectionvar *) 0;
/* REVIEW: initializer added */
schar x, y;
if (argc == 3) {
sel = l_selection_check(L, 1);
x = (schar) luaL_checkinteger(L, 2);
y = (schar) luaL_checkinteger(L, 3);
} else if (argc == 2) {
x = (schar) luaL_checkinteger(L, 1);
y = (schar) luaL_checkinteger(L, 2);
lua_pop(L, 2);
(void) l_selection_new(L);
sel = l_selection_check(L, 1);
} else {
nhl_error(L, "wrong parameters");
}
get_location_coord(&x, &y, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x,y));
if (isok(x,y)) {
set_floodfillchk_match_under(levl[x][y].typ);
selection_floodfill(sel, x, y, FALSE);
}
lua_settop(L, 1);
return 1;
}
/* local s = selection.circle(x,y, radius); */
/* local s = selection.circle(x, y, radius, filled); */
/* local s = selection.circle(sel, x, y, radius); */
/* local s = selection.circle(sel, x, y, radius, filled); */
static int
l_selection_circle(L)
lua_State *L;
{
int argc = lua_gettop(L);
struct selectionvar *sel = (struct selectionvar *) 0;
/* REVIEW: initializer added */
schar x, y;
int r, filled = 0;
if (argc == 3) {
x = (schar) luaL_checkinteger(L, 1);
y = (schar) luaL_checkinteger(L, 2);
r = (int) luaL_checkinteger(L, 3);
lua_pop(L, 3);
(void) l_selection_new(L);
sel = l_selection_check(L, 1);
filled = 0;
} else if (argc == 4 && lua_type(L, 1) == LUA_TNUMBER) {
x = (schar) luaL_checkinteger(L, 1);
y = (schar) luaL_checkinteger(L, 2);
r = (int) luaL_checkinteger(L, 3);
filled = (int) luaL_checkinteger(L, 4); /* TODO: boolean*/
lua_pop(L, 4);
(void) l_selection_new(L);
sel = l_selection_check(L, 1);
} else if (argc == 4 || argc == 5) {
sel = l_selection_check(L, 1);
x = (schar) luaL_checkinteger(L, 2);
y = (schar) luaL_checkinteger(L, 3);
r = (int) luaL_checkinteger(L, 4);
filled = (int) luaL_optinteger(L, 5, 0); /* TODO: boolean */
} else {
nhl_error(L, "wrong parameters");
}
get_location_coord(&x, &y, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x,y));
selection_do_ellipse(sel, x,y, r,r, !filled);
lua_settop(L, 1);
return 1;
}
/* local s = selection.ellipse(x, y, radius1, radius2); */
/* local s = selection.ellipse(x, y, radius1, radius2, filled); */
/* local s = selection.ellipse(sel, x, y, radius1, radius2); */
/* local s = selection.ellipse(sel, x, y, radius1, radius2, filled); */
static int
l_selection_ellipse(L)
lua_State *L;
{
int argc = lua_gettop(L);
struct selectionvar *sel = (struct selectionvar *) 0;
/* REVIEW: initializer added */
schar x, y;
int r1, r2, filled = 0;
if (argc == 4) {
x = (schar) luaL_checkinteger(L, 1);
y = (schar) luaL_checkinteger(L, 2);
r1 = (int) luaL_checkinteger(L, 3);
r2 = (int) luaL_checkinteger(L, 4);
lua_pop(L, 4);
(void) l_selection_new(L);
sel = l_selection_check(L, 1);
filled = 0;
} else if (argc == 5 && lua_type(L, 1) == LUA_TNUMBER) {
x = (schar) luaL_checkinteger(L, 1);
y = (schar) luaL_checkinteger(L, 2);
r1 = (int) luaL_checkinteger(L, 3);
r2 = (int) luaL_checkinteger(L, 4);
filled = (int) luaL_optinteger(L, 5, 0); /* TODO: boolean */
lua_pop(L, 5);
(void) l_selection_new(L);
sel = l_selection_check(L, 1);
} else if (argc == 5 || argc == 6) {
sel = l_selection_check(L, 1);
x = (schar) luaL_checkinteger(L, 2);
y = (schar) luaL_checkinteger(L, 3);
r1 = (int) luaL_checkinteger(L, 4);
r2 = (int) luaL_checkinteger(L, 5);
filled = (int) luaL_optinteger(L, 6, 0); /* TODO: boolean */
} else {
nhl_error(L, "wrong parameters");
}
get_location_coord(&x, &y, ANY_LOC, g.coder ? g.coder->croom : NULL, SP_COORD_PACK(x,y));
selection_do_ellipse(sel, x,y, r1,r2, !filled);
lua_settop(L, 1);
return 1;
}
static const struct luaL_Reg l_selection_methods[] = {
{ "new", l_selection_new },
{ "clone", l_selection_clone },
{ "get", l_selection_getpoint },
{ "set", l_selection_setpoint },
{ "negate", l_selection_not },
{ "percentage", l_selection_filter_percent },
{ "rndcoord", l_selection_rndcoord },
{ "line", l_selection_line },
{ "randline", l_selection_randline },
{ "rect", l_selection_rect },
{ "fillrect", l_selection_fillrect },
{ "area", l_selection_fillrect },
{ "grow", l_selection_grow },
{ "filter_mapchar", l_selection_filter_mapchar },
{ "floodfill", l_selection_flood },
{ "circle", l_selection_circle },
{ "ellipse", l_selection_ellipse },
/* TODO:
{ "gradient", l_selection_gradient },
{ "iterate", l_selection_iterate },
*/
{ NULL, NULL }
};
static const luaL_Reg l_selection_meta[] = {
{ "__gc", l_selection_gc },
{ "__unm", l_selection_not },
{ "__band", l_selection_and },
{ "__bor", l_selection_or },
{ "__bxor", l_selection_xor },
{ "__bnot", l_selection_not },
/* TODO: http://lua-users.org/wiki/MetatableEvents
{ "__add", l_selection_add },
{ "__sub", l_selection_sub },
{ "__ipairs", l_selection_ipairs },
*/
{ NULL, NULL }
};
int
l_selection_register(L)
lua_State *L;
{
int lib_id, meta_id;
/* newclass = {} */
lua_createtable(L, 0, 0);
lib_id = lua_gettop(L);
/* metatable = {} */
luaL_newmetatable(L, "selection");
meta_id = lua_gettop(L);
luaL_setfuncs(L, l_selection_meta, 0);
/* metatable.__index = _methods */
luaL_newlib(L, l_selection_methods);
lua_setfield(L, meta_id, "__index");
/* metatable.__metatable = _meta */
luaL_newlib(L, l_selection_meta);
lua_setfield(L, meta_id, "__metatable");
/* class.__metatable = metatable */
lua_setmetatable(L, lib_id);
/* _G["selection"] = newclass */
lua_setglobal(L, "selection");
return 0;
}