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Refactor userdata metatable registration

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This commit is contained in:
LJ Sonic 2023-10-27 20:17:27 +02:00
parent 4fa4d6e076
commit bc9a378521
11 changed files with 89 additions and 413 deletions
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5
src/lua_consolelib.c
View file

@ -626,10 +626,7 @@ static int cvar_get(lua_State *L)
int LUA_ConsoleLib(lua_State *L)
{
// Metatable for consvar_t
luaL_newmetatable(L, META_CVAR);
lua_pushcfunction(L, cvar_get);
lua_setfield(L, -2, "__index");
lua_pop(L,1);
LUA_RegisterUserdataMetatable(L, META_CVAR, cvar_get, NULL, NULL);
cvar_fields_ref = Lua_CreateFieldTable(L, cvar_opt);

40
src/lua_hudlib.c
View file

@ -1404,16 +1404,13 @@ int LUA_HudLib(lua_State *L)
luaL_register(L, NULL, lib_draw);
lib_draw_ref = luaL_ref(L, LUA_REGISTRYINDEX);
luaL_newmetatable(L, META_HUDINFO);
lua_pushcfunction(L, hudinfo_get);
lua_setfield(L, -2, "__index");
LUA_RegisterUserdataMetatable(L, META_HUDINFO, hudinfo_get, hudinfo_set, hudinfo_num);
LUA_RegisterUserdataMetatable(L, META_COLORMAP, colormap_get, NULL, NULL);
LUA_RegisterUserdataMetatable(L, META_PATCH, patch_get, patch_set, NULL);
LUA_RegisterUserdataMetatable(L, META_CAMERA, camera_get, camera_set, NULL);
lua_pushcfunction(L, hudinfo_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, hudinfo_num);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
patch_fields_ref = Lua_CreateFieldTable(L, patch_opt);
camera_fields_ref = Lua_CreateFieldTable(L, camera_opt);
lua_newuserdata(L, 0);
lua_createtable(L, 0, 2);
@ -1425,31 +1422,6 @@ int LUA_HudLib(lua_State *L)
lua_setmetatable(L, -2);
lua_setglobal(L, "hudinfo");
luaL_newmetatable(L, META_COLORMAP);
lua_pushcfunction(L, colormap_get);
lua_setfield(L, -2, "__index");
lua_pop(L,1);
luaL_newmetatable(L, META_PATCH);
lua_pushcfunction(L, patch_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, patch_set);
lua_setfield(L, -2, "__newindex");
lua_pop(L,1);
patch_fields_ref = Lua_CreateFieldTable(L, patch_opt);
luaL_newmetatable(L, META_CAMERA);
lua_pushcfunction(L, camera_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, camera_set);
lua_setfield(L, -2, "__newindex");
lua_pop(L,1);
camera_fields_ref = Lua_CreateFieldTable(L, camera_opt);
luaL_register(L, "hud", lib_hud);
return 0;
}

107
src/lua_infolib.c
View file

@ -1914,96 +1914,18 @@ int LUA_InfoLib(lua_State *L)
lua_newtable(L);
lua_setfield(L, LUA_REGISTRYINDEX, LREG_ACTIONS);
luaL_newmetatable(L, META_STATE);
lua_pushcfunction(L, state_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, state_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, state_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_MOBJINFO);
lua_pushcfunction(L, mobjinfo_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, mobjinfo_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, mobjinfo_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
LUA_RegisterUserdataMetatable(L, META_STATE, state_get, state_set, state_num);
LUA_RegisterUserdataMetatable(L, META_MOBJINFO, mobjinfo_get, mobjinfo_set, mobjinfo_num);
LUA_RegisterUserdataMetatable(L, META_SKINCOLOR, skincolor_get, skincolor_set, skincolor_num);
LUA_RegisterUserdataMetatable(L, META_COLORRAMP, colorramp_get, colorramp_set, colorramp_len);
LUA_RegisterUserdataMetatable(L, META_SFXINFO, sfxinfo_get, sfxinfo_set, sfxinfo_num);
LUA_RegisterUserdataMetatable(L, META_SPRITEINFO, spriteinfo_get, spriteinfo_set, spriteinfo_num);
LUA_RegisterUserdataMetatable(L, META_PIVOTLIST, pivotlist_get, pivotlist_set, pivotlist_num);
LUA_RegisterUserdataMetatable(L, META_FRAMEPIVOT, framepivot_get, framepivot_set, framepivot_num);
LUA_RegisterUserdataMetatable(L, META_LUABANKS, lib_getluabanks, lib_setluabanks, lib_luabankslen);
mobjinfo_fields_ref = Lua_CreateFieldTable(L, mobjinfo_opt);
luaL_newmetatable(L, META_SKINCOLOR);
lua_pushcfunction(L, skincolor_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, skincolor_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, skincolor_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_COLORRAMP);
lua_pushcfunction(L, colorramp_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, colorramp_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, colorramp_len);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
luaL_newmetatable(L, META_SFXINFO);
lua_pushcfunction(L, sfxinfo_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, sfxinfo_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, sfxinfo_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_SPRITEINFO);
lua_pushcfunction(L, spriteinfo_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, spriteinfo_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, spriteinfo_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_PIVOTLIST);
lua_pushcfunction(L, pivotlist_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, pivotlist_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, pivotlist_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_FRAMEPIVOT);
lua_pushcfunction(L, framepivot_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, framepivot_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, framepivot_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
lua_newuserdata(L, 0);
lua_createtable(L, 0, 2);
lua_pushcfunction(L, lib_getSprname);
@ -2104,16 +2026,5 @@ int LUA_InfoLib(lua_State *L)
lua_setmetatable(L, -2);
lua_setglobal(L, "spriteinfo");
luaL_newmetatable(L, META_LUABANKS);
lua_pushcfunction(L, lib_getluabanks);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, lib_setluabanks);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, lib_luabankslen);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
return 0;
}

14
src/lua_inputlib.c
View file

@ -285,18 +285,8 @@ static int mouse_num(lua_State *L)
int LUA_InputLib(lua_State *L)
{
luaL_newmetatable(L, META_KEYEVENT);
lua_pushcfunction(L, keyevent_get);
lua_setfield(L, -2, "__index");
lua_pop(L, 1);
luaL_newmetatable(L, META_MOUSE);
lua_pushcfunction(L, mouse_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, mouse_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
LUA_RegisterUserdataMetatable(L, META_KEYEVENT, keyevent_get, NULL, NULL);
LUA_RegisterUserdataMetatable(L, META_MOUSE, mouse_get, NULL, mouse_num);
// Register the library, then add __index and __newindex
// metamethods to it to allow global variables

163
src/lua_maplib.c
View file

@ -2843,120 +2843,37 @@ static int mapheaderinfo_get(lua_State *L)
int LUA_MapLib(lua_State *L)
{
luaL_newmetatable(L, META_SECTORLINES);
lua_pushcfunction(L, sectorlines_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, sectorlines_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_SECTOR);
lua_pushcfunction(L, sector_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, sector_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, sector_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
LUA_RegisterUserdataMetatable(L, META_SECTORLINES, sectorlines_get, NULL, sectorlines_num);
LUA_RegisterUserdataMetatable(L, META_SECTOR, sector_get, sector_set, sector_num);
LUA_RegisterUserdataMetatable(L, META_SUBSECTOR, subsector_get, NULL, subsector_num);
LUA_RegisterUserdataMetatable(L, META_LINE, line_get, NULL, line_num);
LUA_RegisterUserdataMetatable(L, META_LINEARGS, lineargs_get, NULL, lineargs_len);
LUA_RegisterUserdataMetatable(L, META_LINESTRINGARGS, linestringargs_get, NULL, linestringargs_len);
LUA_RegisterUserdataMetatable(L, META_SIDENUM, sidenum_get, NULL, NULL);
LUA_RegisterUserdataMetatable(L, META_SIDE, side_get, side_set, side_num);
LUA_RegisterUserdataMetatable(L, META_VERTEX, vertex_get, NULL, vertex_num);
LUA_RegisterUserdataMetatable(L, META_FFLOOR, ffloor_get, ffloor_set, NULL);
LUA_RegisterUserdataMetatable(L, META_BBOX, bbox_get, NULL, NULL);
LUA_RegisterUserdataMetatable(L, META_SLOPE, slope_get, slope_set, NULL);
LUA_RegisterUserdataMetatable(L, META_VECTOR2, vector2_get, NULL, NULL);
LUA_RegisterUserdataMetatable(L, META_VECTOR3, vector3_get, NULL, NULL);
LUA_RegisterUserdataMetatable(L, META_MAPHEADER, mapheaderinfo_get, NULL, NULL);
sector_fields_ref = Lua_CreateFieldTable(L, sector_opt);
luaL_newmetatable(L, META_SUBSECTOR);
lua_pushcfunction(L, subsector_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, subsector_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
subsector_fields_ref = Lua_CreateFieldTable(L, subsector_opt);
luaL_newmetatable(L, META_LINE);
lua_pushcfunction(L, line_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, line_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
line_fields_ref = Lua_CreateFieldTable(L, line_opt);
luaL_newmetatable(L, META_LINEARGS);
lua_pushcfunction(L, lineargs_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, lineargs_len);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_LINESTRINGARGS);
lua_pushcfunction(L, linestringargs_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, linestringargs_len);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_SIDENUM);
lua_pushcfunction(L, sidenum_get);
lua_setfield(L, -2, "__index");
lua_pop(L, 1);
luaL_newmetatable(L, META_SIDE);
lua_pushcfunction(L, side_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, side_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, side_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
side_fields_ref = Lua_CreateFieldTable(L, side_opt);
luaL_newmetatable(L, META_VERTEX);
lua_pushcfunction(L, vertex_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, vertex_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
vertex_fields_ref = Lua_CreateFieldTable(L, vertex_opt);
luaL_newmetatable(L, META_FFLOOR);
lua_pushcfunction(L, ffloor_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, ffloor_set);
lua_setfield(L, -2, "__newindex");
lua_pop(L, 1);
ffloor_fields_ref = Lua_CreateFieldTable(L, ffloor_opt);
slope_fields_ref = Lua_CreateFieldTable(L, slope_opt);
mapheaderinfo_fields_ref = Lua_CreateFieldTable(L, mapheaderinfo_opt);
#ifdef HAVE_LUA_SEGS
luaL_newmetatable(L, META_SEG);
lua_pushcfunction(L, seg_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, seg_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
LUA_RegisterUserdataMetatable(L, META_SEG, seg_get, NULL, seg_num);
LUA_RegisterUserdataMetatable(L, META_NODE, node_get, NULL, node_num);
LUA_RegisterUserdataMetatable(L, META_NODECHILDREN, nodechildren_get, NULL, NULL);
seg_fields_ref = Lua_CreateFieldTable(L, seg_opt);
luaL_newmetatable(L, META_NODE);
lua_pushcfunction(L, node_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, node_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
node_fields_ref = Lua_CreateFieldTable(L, node_opt);
luaL_newmetatable(L, META_NODEBBOX);
@ -2965,48 +2882,8 @@ int LUA_MapLib(lua_State *L)
lua_pushcfunction(L, nodebbox_call);
lua_setfield(L, -2, "__call");
lua_pop(L, 1);
luaL_newmetatable(L, META_NODECHILDREN);
lua_pushcfunction(L, nodechildren_get);
lua_setfield(L, -2, "__index");
lua_pop(L, 1);
#endif
luaL_newmetatable(L, META_BBOX);
lua_pushcfunction(L, bbox_get);
lua_setfield(L, -2, "__index");
lua_pop(L, 1);
luaL_newmetatable(L, META_SLOPE);
lua_pushcfunction(L, slope_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, slope_set);
lua_setfield(L, -2, "__newindex");
lua_pop(L, 1);
slope_fields_ref = Lua_CreateFieldTable(L, slope_opt);
luaL_newmetatable(L, META_VECTOR2);
lua_pushcfunction(L, vector2_get);
lua_setfield(L, -2, "__index");
lua_pop(L, 1);
luaL_newmetatable(L, META_VECTOR3);
lua_pushcfunction(L, vector3_get);
lua_setfield(L, -2, "__index");
lua_pop(L, 1);
luaL_newmetatable(L, META_MAPHEADER);
lua_pushcfunction(L, mapheaderinfo_get);
lua_setfield(L, -2, "__index");
//lua_pushcfunction(L, mapheaderinfo_num);
//lua_setfield(L, -2, "__len");
lua_pop(L, 1);
mapheaderinfo_fields_ref = Lua_CreateFieldTable(L, mapheaderinfo_opt);
LUA_PushTaggableObjectArray(L, "sectors",
lib_iterateSectors,
lib_getSector,

39
src/lua_mobjlib.c
View file

@ -1163,43 +1163,12 @@ static int lib_nummapthings(lua_State *L)
int LUA_MobjLib(lua_State *L)
{
luaL_newmetatable(L, META_MOBJ);
lua_pushcfunction(L, mobj_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, mobj_set);
lua_setfield(L, -2, "__newindex");
lua_pop(L,1);
LUA_RegisterUserdataMetatable(L, META_MOBJ, mobj_get, mobj_set, NULL);
LUA_RegisterUserdataMetatable(L, META_THINGARGS, thingargs_get, NULL, thingargs_len);
LUA_RegisterUserdataMetatable(L, META_THINGSTRINGARGS, thingstringargs_get, NULL, thingstringargs_len);
LUA_RegisterUserdataMetatable(L, META_MAPTHING, mapthing_get, mapthing_set, mapthing_num);
mobj_fields_ref = Lua_CreateFieldTable(L, mobj_opt);
luaL_newmetatable(L, META_THINGARGS);
lua_pushcfunction(L, thingargs_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, thingargs_len);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_THINGSTRINGARGS);
lua_pushcfunction(L, thingstringargs_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, thingstringargs_len);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_MAPTHING);
lua_pushcfunction(L, mapthing_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, mapthing_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, mapthing_num);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
mapthing_fields_ref = Lua_CreateFieldTable(L, mapthing_opt);
LUA_PushTaggableObjectArray(L, "mapthings",

33
src/lua_playerlib.c
View file

@ -1523,38 +1523,11 @@ static int ticcmd_set(lua_State *L)
int LUA_PlayerLib(lua_State *L)
{
luaL_newmetatable(L, META_PLAYER);
lua_pushcfunction(L, player_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, player_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, player_num);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
LUA_RegisterUserdataMetatable(L, META_PLAYER, player_get, player_set, player_num);
LUA_RegisterUserdataMetatable(L, META_POWERS, power_get, power_set, power_len);
LUA_RegisterUserdataMetatable(L, META_TICCMD, ticcmd_get, ticcmd_set, NULL);
player_fields_ref = Lua_CreateFieldTable(L, player_opt);
luaL_newmetatable(L, META_POWERS);
lua_pushcfunction(L, power_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, power_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, power_len);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
luaL_newmetatable(L, META_TICCMD);
lua_pushcfunction(L, ticcmd_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, ticcmd_set);
lua_setfield(L, -2, "__newindex");
lua_pop(L,1);
ticcmd_fields_ref = Lua_CreateFieldTable(L, ticcmd_opt);
lua_newuserdata(L, 0);

29
src/lua_polyobjlib.c
View file

@ -447,32 +447,9 @@ static int lib_numPolyObjects(lua_State *L)
int LUA_PolyObjLib(lua_State *L)
{
luaL_newmetatable(L, META_POLYOBJVERTICES);
lua_pushcfunction(L, polyobjvertices_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, polyobjvertices_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_POLYOBJLINES);
lua_pushcfunction(L, polyobjlines_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, polyobjlines_num);
lua_setfield(L, -2, "__len");
lua_pop(L, 1);
luaL_newmetatable(L, META_POLYOBJ);
lua_pushcfunction(L, polyobj_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, polyobj_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, polyobj_num);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
LUA_RegisterUserdataMetatable(L, META_POLYOBJVERTICES, polyobjvertices_get, NULL, polyobjvertices_num);
LUA_RegisterUserdataMetatable(L, META_POLYOBJLINES, polyobjlines_get, NULL, polyobjlines_num);
LUA_RegisterUserdataMetatable(L, META_POLYOBJ, polyobj_get, polyobj_set, polyobj_num);
lua_newuserdata(L, 0);
lua_createtable(L, 0, 2);

29
src/lua_script.c
View file

@ -1832,3 +1832,32 @@ void LUA_PushTaggableObjectArray
lua_setmetatable(L, -2);
lua_setglobal(L, field);
}
void LUA_RegisterUserdataMetatable(
lua_State *L,
const char *name,
lua_CFunction get,
lua_CFunction set,
lua_CFunction len
)
{
luaL_newmetatable(L, name);
if (get)
{
lua_pushcfunction(L, get);
lua_setfield(L, -2, "__index");
}
if (set)
{
lua_pushcfunction(L, set);
lua_setfield(L, -2, "__newindex");
}
if (len)
{
lua_pushcfunction(L, len);
lua_setfield(L, -2, "__len");
}
lua_pop(L, 1);
}

8
src/lua_script.h
View file

@ -73,6 +73,14 @@ void LUA_PushTaggableObjectArray
size_t sizeof_element,
const char *meta);
void LUA_RegisterUserdataMetatable(
lua_State *L,
const char *name,
lua_CFunction get,
lua_CFunction set,
lua_CFunction len
);
void LUA_InsertTaggroupIterator
( lua_State *L,
taggroup_t *garray[],

35
src/lua_skinlib.c
View file

@ -373,40 +373,13 @@ static int sprite_get(lua_State *L)
int LUA_SkinLib(lua_State *L)
{
luaL_newmetatable(L, META_SKIN);
lua_pushcfunction(L, skin_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, skin_set);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, skin_num);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
LUA_RegisterUserdataMetatable(L, META_SKIN, skin_get, skin_set, skin_num);
LUA_RegisterUserdataMetatable(L, META_SOUNDSID, soundsid_get, NULL, soundsid_num);
LUA_RegisterUserdataMetatable(L, META_SKINSPRITES, lib_getSkinSprite, NULL, lib_numSkinsSprites);
LUA_RegisterUserdataMetatable(L, META_SKINSPRITESLIST, sprite_get, NULL, NULL);
skin_fields_ref = Lua_CreateFieldTable(L, skin_opt);
luaL_newmetatable(L, META_SOUNDSID);
lua_pushcfunction(L, soundsid_get);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, soundsid_num);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
luaL_newmetatable(L, META_SKINSPRITES);
lua_pushcfunction(L, lib_getSkinSprite);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, lib_numSkinsSprites);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
luaL_newmetatable(L, META_SKINSPRITESLIST);
lua_pushcfunction(L, sprite_get);
lua_setfield(L, -2, "__index");
lua_pop(L,1);
lua_newuserdata(L, 0);
lua_createtable(L, 0, 2);
lua_pushcfunction(L, lib_getSkin);