common/lqt_common.cpp

   1 /*
   2  * Copyright (c) 2007-2008 Mauro Iazzi
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use,
   8  * copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following
  11  * conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be
  14  * included in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  18  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  20  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "lqt_common.hpp"
  28 #include <cstring>
  29
  30 #include <QDebug>
  31
  32 static void lqtL_getenumtable (lua_State *L) {
  33         lua_getfield(L, LUA_REGISTRYINDEX, LQT_ENUMS);
  34         if (lua_isnil(L, -1)) {
  35                 lua_pop(L, 1);
  36                 lua_newtable(L);
  37                 lua_pushvalue(L, -1);
  38                 lua_setfield(L, LUA_REGISTRYINDEX, LQT_ENUMS);
  39         }
  40 }
  41
  42 static void lqtL_getpointertable (lua_State *L) {
  43         lua_getfield(L, LUA_REGISTRYINDEX, LQT_POINTERS); // (1) get storage for pointers
  44         if (lua_isnil(L, -1)) { // (1) if there is not
  45                 lua_pop(L, 1); // (0) pop the nil value
  46                 lua_newtable(L); // (1) create a new one
  47                 lua_newtable(L); // (2) create an empty metatable
  48                 lua_pushstring(L, "v"); // (3) push the mode value: weak values are enough
  49                 lua_setfield(L, -2, "__mode"); // (2) set the __mode field
  50                 lua_setmetatable(L, -2); // (1) set it as the metatable
  51                 lua_pushvalue(L, -1); // (2) duplicate the new pointer table
  52                 lua_setfield(L, LUA_REGISTRYINDEX, LQT_POINTERS); // (1) put one copy as storage
  53         }
  54 }
  55
  56 static void lqtL_getreftable (lua_State *L) {
  57         lua_getfield(L, LUA_REGISTRYINDEX, LQT_REFS); // (1) get storage for pointers
  58         if (lua_isnil(L, -1)) { // (1) if there is not
  59                 lua_pop(L, 1); // (0) pop the nil value
  60                 lua_newtable(L); // (1) create a new one
  61                 lua_newtable(L); // (2) create an empty metatable
  62                 lua_pushstring(L, "v"); // (3) push the mode value: weak values are enough
  63                 lua_setfield(L, -2, "__mode"); // (2) set the __mode field
  64                 lua_setmetatable(L, -2); // (1) set it as the metatable
  65                 lua_pushvalue(L, -1); // (2) duplicate the new pointer table
  66                 lua_setfield(L, LUA_REGISTRYINDEX, LQT_REFS); // (1) put one copy as storage
  67         }
  68 }
  69
  70 void * lqtL_getref (lua_State *L, size_t sz, bool weak) {
  71         void *ret = NULL;
  72         lqtL_getreftable(L); // (1)
  73         ret = lua_newuserdata(L, sz); // (2)
  74         /*
  75         lua_newtable(L); // (3)
  76         lua_getglobal(L, "DEBUG"); // (4)
  77         lua_setfield(L, -2, "__gc"); // (3)
  78         lua_setmetatable(L, -2); // (2)
  79         */
  80         if (weak) {
  81             lua_rawseti(L, -2, 1+lua_objlen(L, -2)); // (1)
  82         } else {
  83             lua_pushinteger(L, 1+lua_objlen(L, -2)); // (3)
  84             lua_settable(L, -3); // (1)
  85         }
  86         lua_pop(L, 1);
  87         return ret;
  88 }
  89
  90 bool * lqtL_toboolref (lua_State *L, int index) {
  91         bool tmp = lua_toboolean(L, index);
  92         bool *ret = (bool*)lqtL_getref(L, sizeof(bool), true);
  93         *ret = tmp;
  94         return ret;
  95 }
  96
  97 int * lqtL_tointref (lua_State *L, int index) {
  98         int tmp = lua_tointeger(L, index);
  99         int *ret = (int*)lqtL_getref(L, sizeof(int), false);
 100         *ret = tmp;
 101         return ret;
 102 }
 103
 104 void lqtL_pusharguments (lua_State *L, char **argv) {
 105         int i = 0;
 106         lua_newtable(L);
 107         for (i=0;*argv /* fix the maximum number? */;argv++,i++) {
 108                 lua_pushstring(L, *argv);
 109                 lua_rawseti(L, -2, i+1);
 110         }
 111         return;
 112 }
 113
 114 char ** lqtL_toarguments (lua_State *L, int index) {
 115         char ** ret = (char**)lqtL_getref(L, sizeof(char*)*(lua_objlen(L, index)+1), false);
 116         const char *str = NULL;
 117         size_t strlen = 0;
 118         int i = 0;
 119         for (i=0;;i++) {
 120                 lua_rawgeti(L, index, i+1);
 121                 if (!lua_isstring(L, -1)) {
 122                         str = NULL; strlen = 0;
 123                         ret[i] = NULL;
 124                         lua_pop(L, 1);
 125                         break;
 126                 } else {
 127                         str = lua_tolstring(L, -1, &strlen);
 128                         ret[i] = (char*)lqtL_getref(L, sizeof(char)*(strlen+1), false);
 129                         strncpy(ret[i], str, strlen+1);
 130                         lua_pop(L, 1);
 131                 }
 132         }
 133         return ret;
 134 }
 135
 136 static int lqtL_createenum (lua_State *L, lqt_Enum e[], const char *n) {
 137     luaL_Reg empty[] = { { 0, 0 } };
 138     lqt_Enum *l = e;
 139     lqtL_getenumtable(L); // (1)
 140     lua_newtable(L); // (2)
 141     lua_pushvalue(L, -1); // (3)
 142     lua_setfield(L, -3, n); // (2)
 143     while ( (l->name!=0) ) { // (2)
 144         lua_pushstring(L, l->name); // (3)
 145         lua_pushinteger(L, l->value); // (4)
 146         lua_settable(L, -3); // (2)
 147         lua_pushinteger(L, l->value); // (3)
 148         lua_pushstring(L, l->name); // (4)
 149         lua_settable(L, -3); // (2)
 150         l++; // (2)
 151     }
 152     lua_pop(L, 2); // (0)
 153     l = e;
 154     luaL_register(L, n, empty); // (1)
 155     while ( (l->name!=0) ) { // (1)
 156         lua_pushstring(L, l->name); // (2)
 157         lua_pushinteger(L, l->value); // (3)
 158         lua_settable(L, -3); // (1)
 159         lua_pushinteger(L, l->value); // (2)
 160         lua_pushstring(L, l->name); // (3)
 161         lua_settable(L, -3); // (1)
 162         l++; // (1)
 163     }
 164     lua_pop(L, 1); // (0)
 165     return 0;
 166 }
 167
 168 int lqtL_createenumlist (lua_State *L, lqt_Enumlist list[]) {
 169         while (list->enums!=0 && list->name!=0) {
 170                 lqtL_createenum(L, list->enums, list->name); // (0)
 171                 list++;
 172         }
 173         return 0;
 174 }
 175
 176 static int lqtL_gcfunc (lua_State *L) {
 177         if (!lua_isuserdata(L, 1) && lua_islightuserdata(L, 1)) return 0;
 178         lua_getfenv(L, 1); // (1)
 179         if (!lua_istable(L, -1)) {
 180                 lua_pop(L, 1); // (0)
 181                 return 0;
 182         }
 183         lua_getfield(L, -1, "__gc"); // (2)
 184         lua_remove(L, -2); // (1)
 185         if (!lua_isfunction(L, -1)) {
 186                 lua_pop(L, 1); // (0)
 187                 return 0;
 188         }
 189         lua_pushvalue(L, 1); // (2)
 190         if (lua_pcall(L, 1, 0, 0)) { // (-2;+1/+0)
 191                 // (1)
 192                 return lua_error(L);
 193         }
 194         return 0; // (+0)
 195 }
 196
 197 static int lqtL_newindexfunc (lua_State *L) {
 198         lua_settop(L, 3); // (=3)
 199         if (!lua_isuserdata(L, 1) && lua_islightuserdata(L, 1)) return 0;
 200         lua_getfenv(L, 1); // (+1)
 201         if (!lua_istable(L, -1)) {
 202                 lua_pop(L, 1); // (+0)
 203                 return 0;
 204         }
 205         lua_remove(L, 1); // (+0)
 206         lua_insert(L, 1); // (+0)
 207         lua_rawset(L, 1); // (-2)
 208         return 0;
 209 }
 210 static int lqtL_indexfunc (lua_State *L) {
 211         int i = 1;
 212         if (lua_isuserdata(L, 1) && !lua_islightuserdata(L, 1)) {
 213                 lua_getfenv(L, 1); // (1)
 214                 lua_pushvalue(L, 2); // (2)
 215                 lua_gettable(L, -2); // (2)
 216                 if (!lua_isnil(L, -1)) {
 217                         lua_remove(L, -2);
 218                         return 1;
 219                 }
 220                 lua_pop(L, 2); // (0)
 221         }
 222         lua_pushnil(L); // (+1)
 223         while (!lua_isnone(L, lua_upvalueindex(i))) { // (+1)
 224                 lua_pop(L, 1); // (+0)
 225                 lua_pushvalue(L, 2); // (+1)
 226                 if (i==1) {
 227                         lua_rawget(L, lua_upvalueindex(i)); // (+1)
 228                 } else {
 229                         lua_gettable(L, lua_upvalueindex(i)); // (+1)
 230                 }
 231                 if (!lua_isnil(L, -1)) break;
 232                 i++;
 233         }
 234         return 1; // (+1)
 235 }
 236
 237 static int lqtL_pushindexfunc (lua_State *L, const char *name, lqt_Base *bases) {
 238         int upnum = 1;
 239         luaL_newmetatable(L, name); // (1)
 240         while (bases->basename!=NULL) {
 241                 luaL_newmetatable(L, bases->basename); // (upnum)
 242                 upnum++;
 243                 bases++;
 244         }
 245         lua_pushcclosure(L, lqtL_indexfunc, upnum); // (1)
 246         return 1;
 247 }
 248
 249 static int lqtL_ctor_helper(lua_State*L) {
 250         lua_getfield(L, 1, "new");
 251         lua_replace(L, 1);
 252         lua_call(L, lua_gettop(L)-1, LUA_MULTRET);
 253         return lua_gettop(L);
 254 }
 255
 256 static int lqtL_local_ctor(lua_State*L) {
 257         lua_pushvalue(L, lua_upvalueindex(1)); // (+1)
 258         lua_getfield(L, -1, "new"); // (+2)
 259         lua_insert(L, 1); // (+2)
 260         lua_pop(L, 1); // (+1)
 261         lua_call(L, lua_gettop(L)-1, LUA_MULTRET); // (X)
 262         lua_getfield(L, 1, "delete"); // (X+1)
 263         lua_setfield(L, 1, "__gc"); // (X)
 264         return lua_gettop(L);
 265 }
 266
 267 int lqtL_createclass (lua_State *L, const char *name, luaL_Reg *mt, lqt_Base *bases) {
 268         int len = 0;
 269         char *new_name = NULL;
 270         lqt_Base *bi = bases;
 271         luaL_newmetatable(L, name); // (1)
 272         luaL_register(L, NULL, mt); // (1)
 273         // setup offsets
 274         lua_pushstring(L, name); // (2) FIXME: remove
 275         lua_pushinteger(L, 0); // (3) FIXME: remove
 276         lua_settable(L, -3); // (1) FIXME: remove
 277         while (bi->basename!=NULL) {
 278                 lua_pushstring(L, bi->basename); // (2) FIXME: remove
 279                 lua_pushinteger(L, bi->offset); // (3) FIXME: remove
 280                 lua_settable(L, -3); // (1) FIXME: remove
 281                 bi++;
 282         }
 283         // set metafunctions
 284         lqtL_pushindexfunc(L, name, bases); // (2)
 285         lua_setfield(L, -2, "__index"); // (1)
 286         lua_pushcfunction(L, lqtL_newindexfunc); // (2)
 287         lua_setfield(L, -2, "__newindex"); // (1)
 288         lua_pushcfunction(L, lqtL_gcfunc); // (2)
 289         lua_setfield(L, -2, "__gc"); // (1)
 290
 291         // set it as its own metatable
 292         lua_pushvalue(L, -1); // (2)
 293         lua_setmetatable(L, -2); // (1)
 294         lua_pop(L, 1); // (0)
 295         len = strlen(name);
 296         new_name = (char*)malloc(len*sizeof(char));
 297         strncpy(new_name, name, len);
 298         new_name[len-1] = '\0';
 299         luaL_register(L, new_name, mt); // (1)
 300         free(new_name);
 301         new_name = NULL;
 302         lua_newtable(L); // (2)
 303         lua_pushcfunction(L, lqtL_ctor_helper); // (3)
 304         lua_setfield(L, -2, "__call"); // (2)
 305         lua_setmetatable(L, -2); // (1)
 306         lua_pushvalue(L, -1); // (2)
 307         lua_pushcclosure(L, lqtL_local_ctor, 1); // (2)
 308         lua_setfield(L, -2, "new_local");
 309         lua_pop(L, 1); // (0)
 310         /*
 311         lua_pushlstring(L, name, strlen(name)-1); // (1)
 312         lua_newtable(L); // (2)
 313         luaL_newmetatable(L, name); // (3)
 314         lua_setmetatable(L, -2); // (2)
 315         // don't register again but use metatable
 316         //luaL_register(L, NULL, mt); // (2)
 317         lua_settable(L, LUA_GLOBALSINDEX); // (0)
 318         */
 319         return 0;
 320 }
 321
 322 int lqtL_createclasses (lua_State *L, lqt_Class *list) {
 323         while (list->name!=0) { // (0)
 324                 luaL_newmetatable(L, list->name); // (1)
 325                 luaL_register(L, NULL, list->mt); // (1)
 326                 lua_pushstring(L, list->name); // (2)
 327                 lua_pushboolean(L, 1); // (3)
 328                 lua_settable(L, -3); // (1)
 329                 lqtL_pushindexfunc(L, list->name, list->bases); // (2)
 330                 lua_setfield(L, -2, "__index"); // (1)
 331                 lua_pushcfunction(L, lqtL_newindexfunc); // (2)
 332                 lua_setfield(L, -2, "__newindex"); // (1)
 333                 lua_pushcfunction(L, lqtL_gcfunc); // (2)
 334                 lua_setfield(L, -2, "__gc"); // (1)
 335                 lua_pushvalue(L, -1); // (2)
 336                 lua_setmetatable(L, -2); // (1)
 337                 lua_pop(L, 1); // (0)
 338                 lua_pushlstring(L, list->name, strlen(list->name)-1); // (1)
 339                 lua_newtable(L); // (2)
 340                 luaL_register(L, NULL, list->mt); // (2)
 341                 lua_settable(L, LUA_GLOBALSINDEX); // (0)
 342                 list++;
 343         }
 344         return 0;
 345 }
 346
 347 bool lqtL_isinteger (lua_State *L, int i) {
 348         if (lua_type(L, i)==LUA_TNUMBER)
 349                 return lua_tointeger(L, i)==lua_tonumber(L, i);
 350         else
 351                 return false;
 352 }
 353 bool lqtL_isnumber (lua_State *L, int i) {
 354         return lua_type(L, i)==LUA_TNUMBER;
 355 }
 356 bool lqtL_isstring (lua_State *L, int i) {
 357         return lua_type(L, i)==LUA_TSTRING;
 358 }
 359 bool lqtL_isboolean (lua_State *L, int i) {
 360         return lua_type(L, i)==LUA_TBOOLEAN;
 361 }
 362 bool lqtL_missarg (lua_State *L, int index, int n) {
 363         bool ret = true;
 364         int i = 0;
 365         for (i=index;i<index+n;i++) {
 366                 if (!lua_isnoneornil(L, i)) {
 367                         ret = false;
 368                         break;
 369                 }
 370         }
 371         return ret;
 372 }
 373
 374 static void CS(lua_State *L) {
 375         qDebug() << "++++++++++";
 376         for (int i=1;i<=lua_gettop(L);i++) {
 377                 qDebug() << luaL_typename(L, i) << lua_touserdata(L, i);
 378         }
 379         qDebug() << "----------";
 380 }
 381
 382 static void lqtL_ensurepointer (lua_State *L, const void *p) { // (+1)
 383         lqtL_getpointertable(L); // (1)
 384         lua_pushlightuserdata(L, const_cast<void*>(p)); // (2)
 385         lua_gettable(L, -2); // (2)
 386         if (lua_isnil(L, -1)) { // (2)
 387                 lua_pop(L, 1); // (1)
 388                 const void **pp = static_cast<const void**>(lua_newuserdata(L, sizeof(void*))); // (2)
 389                 *pp = p; // (2)
 390                 lua_newtable(L); // (3)
 391                 lua_setfenv(L, -2); // (2)
 392                 lua_pushlightuserdata(L, const_cast<void*>(p)); // (3)
 393                 lua_pushvalue(L, -2); // (4)
 394                 lua_settable(L, -4); // (2)
 395         } else {
 396                 //const void **pp = static_cast<const void**>(lua_touserdata(L, -1)); // (2)
 397                 //if (pp!=NULL) *pp = p; // (2)
 398         }
 399         // (2)
 400         lua_remove(L, -2); // (1)
 401 }
 402
 403 void lqtL_register (lua_State *L, const void *p) { // (+0)
 404         lqtL_ensurepointer(L, p);
 405         lua_pop(L, 1);
 406 }
 407
 408 void lqtL_unregister (lua_State *L, const void *p) {
 409         lqtL_getpointertable(L); // (1)
 410         lua_pushlightuserdata(L, const_cast<void*>(p)); // (2)
 411         lua_gettable(L, -2); // (2)
 412         if (lua_isuserdata(L, -1)) {
 413                 const void **pp = static_cast<const void**>(lua_touserdata(L, -1)); // (2)
 414                 *pp = 0;
 415         }
 416         lua_pop(L, 1); // (1)
 417         lua_pushlightuserdata(L, const_cast<void*>(p)); // (2)
 418         lua_pushnil(L); // (3)
 419         lua_settable(L, -3); // (1)
 420         lua_pop(L, 1); // (0)
 421 }
 422
 423 void lqtL_pushudata (lua_State *L, const void *p, const char *name) {
 424         bool already = false;
 425         lqtL_ensurepointer(L, p); // (1)
 426         if (lua_getmetatable(L, -1)) {
 427                 // (2)
 428                 lua_pop(L, 1); // (1)
 429                 lua_getfield(L, -1, name); // (2)
 430                 already = lua_toboolean(L, -1); // (2)
 431                 lua_pop(L, 1); // (1)
 432         } else {
 433                 // (1)
 434         }
 435         if (!already) {
 436                 luaL_newmetatable(L, name); // (2)
 437                 lua_setmetatable(L, -2); // (1)
 438         }
 439         return;
 440 }
 441
 442 void lqtL_passudata (lua_State *L, const void *p, const char *name) {
 443         lqtL_pushudata(L, p, name);
 444         // FIXME: these should be added, but it is not safe for now
 445         //lua_getfield(L, -1, "delete");
 446         //lua_setfield(L, -2, "__gc");
 447         return;
 448 }
 449
 450 void lqtL_copyudata (lua_State *L, const void *p, const char *name) {
 451         luaL_newmetatable(L, name);
 452         lua_pushstring(L, "new");
 453         lua_rawget(L, -2);
 454         if (lua_isnil(L, -1)) {
 455                 qDebug() << "cannot copy" << name;
 456                 lua_pop(L, 2);
 457                 lua_pushnil(L);
 458         } else {
 459                 lua_remove(L, -2);
 460                 lqtL_pushudata(L, p, name);
 461                 if (lua_pcall(L, 1, 1, 0)) {
 462                         qDebug() << "error copying" << name;
 463                         lua_pop(L, 1);
 464                         lua_pushnil(L);
 465                 }
 466         }
 467         return;
 468 }
 469
 470 void *lqtL_toudata (lua_State *L, int index, const char *name) {
 471         void *ret = 0;
 472         if (!lqtL_testudata(L, index, name)) return 0;
 473         void **pp = static_cast<void**>(lua_touserdata(L, index));
 474         ret = *pp;
 475         lua_getfield(L, index, name);
 476         ret = (void*)(lua_tointeger(L, -1) + (char*)ret);
 477         lua_pop(L, 1);
 478         return ret;
 479 }
 480
 481 void lqtL_eraseudata (lua_State *L, int index, const char *name) {
 482         void *ret = 0;
 483         if (name!=NULL && !lqtL_testudata(L, index, name)) return;
 484         void **pp = static_cast<void**>(lua_touserdata(L, index));
 485         void *p = *pp;
 486         *pp = 0;
 487         lqtL_getpointertable(L); // (1)
 488         lua_pushlightuserdata(L, p); // (2)
 489         lua_pushnil(L); // (3)
 490         lua_settable(L, -3); // (1)
 491         lua_pop(L, 1);
 492         return;
 493 }
 494
 495 bool lqtL_testudata (lua_State *L, int index, const char *name) {
 496         if (!lua_isuserdata(L, index) || lua_islightuserdata(L, index)) return false;
 497         lua_getfield(L, index, name);
 498         if (lua_isnil(L, -1)) {
 499                 lua_pop(L, 1);
 500                 return false;
 501         }
 502         lua_pop(L, 1);
 503         return true;
 504 }
 505
 506 void lqtL_pushenum (lua_State *L, int value, const char *name) {
 507         lqtL_getenumtable(L);
 508         lua_getfield(L, -1, name);
 509         lua_remove(L, -2);
 510         if (!lua_istable(L, -1)) {
 511                 lua_pop(L, 1);
 512                 lua_pushnil(L);
 513                 return;
 514         }
 515         lua_pushnumber(L, value);
 516         lua_gettable(L, -2);
 517         lua_remove(L, -2);
 518 }
 519
 520 bool lqtL_isenum (lua_State *L, int index, const char *name) {
 521         bool ret = false;
 522         if (!lua_isstring(L, index)) return false;
 523         lqtL_getenumtable(L);
 524         lua_getfield(L, -1, name);
 525         if (!lua_istable(L, -1)) {
 526                 lua_pop(L, 2);
 527                 return false;
 528         }
 529         lua_remove(L, -2);
 530         lua_pushvalue(L, index);
 531         lua_gettable(L, -2);
 532         ret = !lua_isnil(L, -1);
 533         lua_pop(L, 2);
 534         return ret;
 535 }
 536
 537 int lqtL_toenum (lua_State *L, int index, const char *name) {
 538         int ret = -1;
 539         // index = LQT_TOPOSITIVE(L, index);
 540         lqtL_getenumtable(L); // (1)
 541         lua_getfield(L, -1, name); // (2)
 542         if (lua_isnil(L, -1)) {
 543                 lua_pop(L, 2); //(0)
 544                 return 0;
 545         }
 546         lua_pushvalue(L, index); // (3)
 547         lua_gettable(L, -2); // (3)
 548         if (lqtL_isinteger(L, -1)) {
 549             ret = lua_tointeger(L, -1); // (3)
 550         } else {
 551             ret = lua_tointeger(L, index); // (3)
 552         }
 553         lua_pop(L, 3); // (0)
 554         return ret;
 555 }
 556
 557 int lqtL_getflags (lua_State *L, int index, const char *name) {
 558         int ret = 0;
 559         int eindex = 0;
 560         int i = 1;
 561         if (lqtL_isinteger(L, index)) return lua_tointeger(L, index);
 562         if (!lua_istable(L, index)) return 0;
 563         lqtL_getenumtable(L); // (1)
 564         lua_getfield(L, -1, name); // (2)
 565         if (!lua_istable(L, -1)) {
 566                 // (2)
 567                 lua_pop(L, 2);
 568                 return 0;
 569         }
 570         // (2)
 571         lua_remove(L, -2); // (1)
 572         eindex = lua_gettop(L);
 573         for (i=1;;i++) { // (1)
 574                 lua_rawgeti(L, index, i); // (2)
 575                 if (lua_type(L, -1)!=LUA_TSTRING) {
 576                         lua_pop(L, 1); // (1)
 577                         break;
 578                 } else {
 579                         lua_gettable(L, eindex); // (2)
 580                         ret = ret | (int)lua_tointeger(L, -1);
 581                         lua_pop(L, 1); // (1)
 582                 }
 583         }
 584         // (1)
 585         lua_pop(L, 1); // (0)
 586         return ret;
 587 }
 588
 589 void lqtL_pushflags (lua_State *L, int index, const char *name) {
 590         // TODO
 591         lua_pushnil(L);
 592         return;
 593 }
 594
 595 int lqtL_touintarray (lua_State *L) {
 596         uint *p = NULL;
 597         size_t i = 0;
 598         size_t n, nb;
 599         n = lua_objlen(L, -1);
 600         nb = (n + 1) * sizeof(uint);
 601         p = (uint*)lua_newuserdata(L, nb);
 602         for (i=1;i<=n;i++) {
 603                 lua_rawgeti(L, -2, i);
 604                 p[i-1] = lua_tointeger(L, -1);
 605                 lua_pop(L, 1);
 606         }
 607         lua_remove(L, -2);
 608         p[n] = 0;
 609         return 1;
 610 }
 611
 612
 613
 614