src/lib/lbaselib.c

   1 /*
   2 ** $Id: lbaselib.c,v 1.17a 2000/11/06 13:45:18 roberto Exp $
   3 ** Basic library
   4 ** See Copyright Notice in lua.h
   5 */
   6
   7
   8
   9 #include <ctype.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13
  14 #include "lua.h"
  15
  16 #include "lauxlib.h"
  17 #include "luadebug.h"
  18 #include "lualib.h"
  19
  20
  21
  22 /*
  23 ** If your system does not support `stderr', redefine this function, or
  24 ** redefine _ERRORMESSAGE so that it won't need _ALERT.
  25 */
  26 static int luaB__ALERT (lua_State *L) {
  27   fputs(luaL_check_string(L, 1), stderr);
  28   return 0;
  29 }
  30
  31
  32 /*
  33 ** Basic implementation of _ERRORMESSAGE.
  34 ** The library `liolib' redefines _ERRORMESSAGE for better error information.
  35 */
  36 static int luaB__ERRORMESSAGE (lua_State *L) {
  37   luaL_checktype(L, 1, LUA_TSTRING);
  38   lua_getglobal(L, LUA_ALERT);
  39   if (lua_isfunction(L, -1)) {  /* avoid error loop if _ALERT is not defined */
  40     lua_Debug ar;
  41     lua_pushstring(L, "error: ");
  42     lua_pushvalue(L, 1);
  43     if (lua_getstack(L, 1, &ar)) {
  44       lua_getinfo(L, "Sl", &ar);
  45       if (ar.source && ar.currentline > 0) {
  46         char buff[100];
  47         sprintf(buff, "\n  <%.70s: line %d>", ar.short_src, ar.currentline);
  48         lua_pushstring(L, buff);
  49         lua_concat(L, 2);
  50       }
  51     }
  52     lua_pushstring(L, "\n");
  53     lua_concat(L, 3);
  54     lua_rawcall(L, 1, 0);
  55   }
  56   return 0;
  57 }
  58
  59
  60 /*
  61 ** If your system does not support `stdout', you can just remove this function.
  62 ** If you need, you can define your own `print' function, following this
  63 ** model but changing `fputs' to put the strings at a proper place
  64 ** (a console window or a log file, for instance).
  65 */
  66 static int luaB_print (lua_State *L) {
  67   int n = lua_gettop(L);  /* number of arguments */
  68   int i;
  69   lua_getglobal(L, "tostring");
  70   for (i=1; i<=n; i++) {
  71     const char *s;
  72     lua_pushvalue(L, -1);  /* function to be called */
  73     lua_pushvalue(L, i);   /* value to print */
  74     lua_rawcall(L, 1, 1);
  75     s = lua_tostring(L, -1);  /* get result */
  76     if (s == NULL)
  77       lua_error(L, "`tostring' must return a string to `print'");
  78     if (i>1) fputs("\t", stdout);
  79     fputs(s, stdout);
  80     lua_pop(L, 1);  /* pop result */
  81   }
  82   fputs("\n", stdout);
  83   return 0;
  84 }
  85
  86
  87 static int luaB_tonumber (lua_State *L) {
  88   int base = luaL_opt_int(L, 2, 10);
  89   if (base == 10) {  /* standard conversion */
  90     luaL_checkany(L, 1);
  91     if (lua_isnumber(L, 1)) {
  92       lua_pushnumber(L, lua_tonumber(L, 1));
  93       return 1;
  94     }
  95   }
  96   else {
  97     const char *s1 = luaL_check_string(L, 1);
  98     char *s2;
  99     unsigned long n;
 100     luaL_arg_check(L, 2 <= base && base <= 36, 2, "base out of range");
 101     n = strtoul(s1, &s2, base);
 102     if (s1 != s2) {  /* at least one valid digit? */
 103       while (isspace((unsigned char)*s2)) s2++;  /* skip trailing spaces */
 104       if (*s2 == '\0') {  /* no invalid trailing characters? */
 105         lua_pushnumber(L, n);
 106         return 1;
 107       }
 108     }
 109   }
 110   lua_pushnil(L);  /* else not a number */
 111   return 1;
 112 }
 113
 114
 115 static int luaB_error (lua_State *L) {
 116   lua_error(L, luaL_opt_string(L, 1, NULL));
 117   return 0;  /* to avoid warnings */
 118 }
 119
 120 static int luaB_setglobal (lua_State *L) {
 121   luaL_checkany(L, 2);
 122   lua_setglobal(L, luaL_check_string(L, 1));
 123   return 0;
 124 }
 125
 126 static int luaB_getglobal (lua_State *L) {
 127   lua_getglobal(L, luaL_check_string(L, 1));
 128   return 1;
 129 }
 130
 131 static int luaB_tag (lua_State *L) {
 132   luaL_checkany(L, 1);
 133   lua_pushnumber(L, lua_tag(L, 1));
 134   return 1;
 135 }
 136
 137 static int luaB_settag (lua_State *L) {
 138   luaL_checktype(L, 1, LUA_TTABLE);
 139   lua_pushvalue(L, 1);  /* push table */
 140   lua_settag(L, luaL_check_int(L, 2));
 141   return 1;  /* return table */
 142 }
 143
 144 static int luaB_newtag (lua_State *L) {
 145   lua_pushnumber(L, lua_newtag(L));
 146   return 1;
 147 }
 148
 149 static int luaB_copytagmethods (lua_State *L) {
 150   lua_pushnumber(L, lua_copytagmethods(L, luaL_check_int(L, 1),
 151                                           luaL_check_int(L, 2)));
 152   return 1;
 153 }
 154
 155 static int luaB_globals (lua_State *L) {
 156   lua_getglobals(L);  /* value to be returned */
 157   if (!lua_isnull(L, 1)) {
 158     luaL_checktype(L, 1, LUA_TTABLE);
 159     lua_pushvalue(L, 1);  /* new table of globals */
 160     lua_setglobals(L);
 161   }
 162   return 1;
 163 }
 164
 165 static int luaB_rawget (lua_State *L) {
 166   luaL_checktype(L, 1, LUA_TTABLE);
 167   luaL_checkany(L, 2);
 168   lua_rawget(L, 1);
 169   return 1;
 170 }
 171
 172 static int luaB_rawset (lua_State *L) {
 173   luaL_checktype(L, 1, LUA_TTABLE);
 174   luaL_checkany(L, 2);
 175   luaL_checkany(L, 3);
 176   lua_rawset(L, 1);
 177   return 1;
 178 }
 179
 180 static int luaB_settagmethod (lua_State *L) {
 181   int tag = luaL_check_int(L, 1);
 182   const char *event = luaL_check_string(L, 2);
 183   luaL_arg_check(L, lua_isfunction(L, 3) || lua_isnil(L, 3), 3,
 184                  "function or nil expected");
 185   if (strcmp(event, "gc") == 0)
 186     lua_error(L, "deprecated use: cannot set the `gc' tag method from Lua");
 187   lua_gettagmethod(L, tag, event);
 188   lua_pushvalue(L, 3);
 189   lua_settagmethod(L, tag, event);
 190   return 1;
 191 }
 192
 193
 194 static int luaB_gettagmethod (lua_State *L) {
 195   int tag = luaL_check_int(L, 1);
 196   const char *event = luaL_check_string(L, 2);
 197   if (strcmp(event, "gc") == 0)
 198     lua_error(L, "deprecated use: cannot get the `gc' tag method from Lua");
 199   lua_gettagmethod(L, tag, event);
 200   return 1;
 201 }
 202
 203
 204 static int luaB_gcinfo (lua_State *L) {
 205   lua_pushnumber(L, lua_getgccount(L));
 206   lua_pushnumber(L, lua_getgcthreshold(L));
 207   return 2;
 208 }
 209
 210
 211 static int luaB_collectgarbage (lua_State *L) {
 212   lua_setgcthreshold(L, luaL_opt_int(L, 1, 0));
 213   return 0;
 214 }
 215
 216
 217 static int luaB_type (lua_State *L) {
 218   luaL_checkany(L, 1);
 219   lua_pushstring(L, lua_typename(L, lua_type(L, 1)));
 220   return 1;
 221 }
 222
 223
 224 static int luaB_next (lua_State *L) {
 225   luaL_checktype(L, 1, LUA_TTABLE);
 226   lua_settop(L, 2);  /* create a 2nd argument if there isn't one */
 227   if (lua_next(L, 1))
 228     return 2;
 229   else {
 230     lua_pushnil(L);
 231     return 1;
 232   }
 233 }
 234
 235
 236 static int passresults (lua_State *L, int status, int oldtop) {
 237   static const char *const errornames[] =
 238     {"ok", "run-time error", "file error", "syntax error",
 239      "memory error", "error in error handling"};
 240   if (status == 0) {
 241     int nresults = lua_gettop(L) - oldtop;
 242     if (nresults > 0)
 243       return nresults;  /* results are already on the stack */
 244     else {
 245       lua_pushuserdata(L, NULL);  /* at least one result to signal no errors */
 246       return 1;
 247     }
 248   }
 249   else {  /* error */
 250     lua_pushnil(L);
 251     lua_pushstring(L, errornames[status]);  /* error code */
 252     return 2;
 253   }
 254 }
 255
 256 static int luaB_dostring (lua_State *L) {
 257   int oldtop = lua_gettop(L);
 258   size_t l;
 259   const char *s = luaL_check_lstr(L, 1, &l);
 260   if (*s == '\33')  /* binary files start with ESC... */
 261     lua_error(L, "`dostring' cannot run pre-compiled code");
 262   return passresults(L, lua_dobuffer(L, s, l, luaL_opt_string(L, 2, s)), oldtop);
 263 }
 264
 265
 266 static int luaB_dofile (lua_State *L) {
 267   int oldtop = lua_gettop(L);
 268   const char *fname = luaL_opt_string(L, 1, NULL);
 269   return passresults(L, lua_dofile(L, fname), oldtop);
 270 }
 271
 272
 273 static int luaB_call (lua_State *L) {
 274   int oldtop;
 275   const char *options = luaL_opt_string(L, 3, "");
 276   int err = 0;  /* index of old error method */
 277   int i, status;
 278   int n;
 279   luaL_checktype(L, 2, LUA_TTABLE);
 280   n = lua_getn(L, 2);
 281   if (!lua_isnull(L, 4)) {  /* set new error method */
 282     lua_getglobal(L, LUA_ERRORMESSAGE);
 283     err = lua_gettop(L);  /* get index */
 284     lua_pushvalue(L, 4);
 285     lua_setglobal(L, LUA_ERRORMESSAGE);
 286   }
 287   oldtop = lua_gettop(L);  /* top before function-call preparation */
 288   /* push function */
 289   lua_pushvalue(L, 1);
 290   luaL_checkstack(L, n, "too many arguments");
 291   for (i=0; i<n; i++)  /* push arg[1...n] */
 292     lua_rawgeti(L, 2, i+1);
 293   status = lua_call(L, n, LUA_MULTRET);
 294   if (err != 0) {  /* restore old error method */
 295     lua_pushvalue(L, err);
 296     lua_setglobal(L, LUA_ERRORMESSAGE);
 297   }
 298   if (status != 0) {  /* error in call? */
 299     if (strchr(options, 'x'))
 300       lua_pushnil(L);  /* return nil to signal the error */
 301     else
 302       lua_error(L, NULL);  /* propagate error without additional messages */
 303     return 1;
 304   }
 305   if (strchr(options, 'p'))  /* pack results? */
 306     lua_error(L, "deprecated option `p' in `call'");
 307   return lua_gettop(L) - oldtop;  /* results are already on the stack */
 308 }
 309
 310
 311 static int luaB_tostring (lua_State *L) {
 312   char buff[64];
 313   switch (lua_type(L, 1)) {
 314     case LUA_TNUMBER:
 315       lua_pushstring(L, lua_tostring(L, 1));
 316       return 1;
 317     case LUA_TSTRING:
 318       lua_pushvalue(L, 1);
 319       return 1;
 320     case LUA_TTABLE:
 321       sprintf(buff, "table: %p", lua_topointer(L, 1));
 322       break;
 323     case LUA_TFUNCTION:
 324       sprintf(buff, "function: %p", lua_topointer(L, 1));
 325       break;
 326     case LUA_TUSERDATA:
 327       sprintf(buff, "userdata(%d): %p", lua_tag(L, 1), lua_touserdata(L, 1));
 328       break;
 329     case LUA_TNIL:
 330       lua_pushstring(L, "nil");
 331       return 1;
 332     default:
 333       luaL_argerror(L, 1, "value expected");
 334   }
 335   lua_pushstring(L, buff);
 336   return 1;
 337 }
 338
 339
 340 static int luaB_foreachi (lua_State *L) {
 341   int n, i;
 342   luaL_checktype(L, 1, LUA_TTABLE);
 343   luaL_checktype(L, 2, LUA_TFUNCTION);
 344   n = lua_getn(L, 1);
 345   for (i=1; i<=n; i++) {
 346     lua_pushvalue(L, 2);  /* function */
 347     lua_pushnumber(L, i);  /* 1st argument */
 348     lua_rawgeti(L, 1, i);  /* 2nd argument */
 349     lua_rawcall(L, 2, 1);
 350     if (!lua_isnil(L, -1))
 351       return 1;
 352     lua_pop(L, 1);  /* remove nil result */
 353   }
 354   return 0;
 355 }
 356
 357
 358 static int luaB_foreach (lua_State *L) {
 359   luaL_checktype(L, 1, LUA_TTABLE);
 360   luaL_checktype(L, 2, LUA_TFUNCTION);
 361   lua_pushnil(L);  /* first index */
 362   for (;;) {
 363     if (lua_next(L, 1) == 0)
 364       return 0;
 365     lua_pushvalue(L, 2);  /* function */
 366     lua_pushvalue(L, -3);  /* key */
 367     lua_pushvalue(L, -3);  /* value */
 368     lua_rawcall(L, 2, 1);
 369     if (!lua_isnil(L, -1))
 370       return 1;
 371     lua_pop(L, 2);  /* remove value and result */
 372   }
 373 }
 374
 375
 376 static int luaB_assert (lua_State *L) {
 377   luaL_checkany(L, 1);
 378   if (lua_isnil(L, 1))
 379     luaL_verror(L, "assertion failed!  %.90s", luaL_opt_string(L, 2, ""));
 380   return 0;
 381 }
 382
 383
 384 static int luaB_getn (lua_State *L) {
 385   luaL_checktype(L, 1, LUA_TTABLE);
 386   lua_pushnumber(L, lua_getn(L, 1));
 387   return 1;
 388 }
 389
 390
 391 static int luaB_tinsert (lua_State *L) {
 392   int v = lua_gettop(L);  /* last argument: to be inserted */
 393   int n, pos;
 394   luaL_checktype(L, 1, LUA_TTABLE);
 395   n = lua_getn(L, 1);
 396   if (v == 2)  /* called with only 2 arguments */
 397     pos = n+1;
 398   else
 399     pos = luaL_check_int(L, 2);  /* 2nd argument is the position */
 400   lua_pushstring(L, "n");
 401   lua_pushnumber(L, n+1);
 402   lua_rawset(L, 1);  /* t.n = n+1 */
 403   for (; n>=pos; n--) {
 404     lua_rawgeti(L, 1, n);
 405     lua_rawseti(L, 1, n+1);  /* t[n+1] = t[n] */
 406   }
 407   lua_pushvalue(L, v);
 408   lua_rawseti(L, 1, pos);  /* t[pos] = v */
 409   return 0;
 410 }
 411
 412
 413 static int luaB_tremove (lua_State *L) {
 414   int pos, n;
 415   luaL_checktype(L, 1, LUA_TTABLE);
 416   n = lua_getn(L, 1);
 417   pos = luaL_opt_int(L, 2, n);
 418   if (n <= 0) return 0;  /* table is "empty" */
 419   lua_rawgeti(L, 1, pos);  /* result = t[pos] */
 420   for ( ;pos<n; pos++) {
 421     lua_rawgeti(L, 1, pos+1);
 422     lua_rawseti(L, 1, pos);  /* a[pos] = a[pos+1] */
 423   }
 424   lua_pushstring(L, "n");
 425   lua_pushnumber(L, n-1);
 426   lua_rawset(L, 1);  /* t.n = n-1 */
 427   lua_pushnil(L);
 428   lua_rawseti(L, 1, n);  /* t[n] = nil */
 429   return 1;
 430 }
 431
 432
 433
 434
 435 /*
 436 ** {======================================================
 437 ** Quicksort
 438 ** (based on `Algorithms in MODULA-3', Robert Sedgewick;
 439 **  Addison-Wesley, 1993.)
 440 */
 441
 442
 443 static void set2 (lua_State *L, int i, int j) {
 444   lua_rawseti(L, 1, i);
 445   lua_rawseti(L, 1, j);
 446 }
 447
 448 static int sort_comp (lua_State *L, int a, int b) {
 449   /* WARNING: the caller (auxsort) must ensure stack space */
 450   if (!lua_isnil(L, 2)) {  /* function? */
 451     int res;
 452     lua_pushvalue(L, 2);
 453     lua_pushvalue(L, a-1);  /* -1 to compensate function */
 454     lua_pushvalue(L, b-2);  /* -2 to compensate function and `a' */
 455     lua_rawcall(L, 2, 1);
 456     res = !lua_isnil(L, -1);
 457     lua_pop(L, 1);
 458     return res;
 459   }
 460   else  /* a < b? */
 461     return lua_lessthan(L, a, b);
 462 }
 463
 464 static void auxsort (lua_State *L, int l, int u) {
 465   while (l < u) {  /* for tail recursion */
 466     int i, j;
 467     /* sort elements a[l], a[(l+u)/2] and a[u] */
 468     lua_rawgeti(L, 1, l);
 469     lua_rawgeti(L, 1, u);
 470     if (sort_comp(L, -1, -2))  /* a[u] < a[l]? */
 471       set2(L, l, u);  /* swap a[l] - a[u] */
 472     else
 473       lua_pop(L, 2);
 474     if (u-l == 1) break;  /* only 2 elements */
 475     i = (l+u)/2;
 476     lua_rawgeti(L, 1, i);
 477     lua_rawgeti(L, 1, l);
 478     if (sort_comp(L, -2, -1))  /* a[i]<a[l]? */
 479       set2(L, i, l);
 480     else {
 481       lua_pop(L, 1);  /* remove a[l] */
 482       lua_rawgeti(L, 1, u);
 483       if (sort_comp(L, -1, -2))  /* a[u]<a[i]? */
 484         set2(L, i, u);
 485       else
 486         lua_pop(L, 2);
 487     }
 488     if (u-l == 2) break;  /* only 3 elements */
 489     lua_rawgeti(L, 1, i);  /* Pivot */
 490     lua_pushvalue(L, -1);
 491     lua_rawgeti(L, 1, u-1);
 492     set2(L, i, u-1);
 493     /* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */
 494     i = l; j = u-1;
 495     for (;;) {  /* invariant: a[l..i] <= P <= a[j..u] */
 496       /* repeat ++i until a[i] >= P */
 497       while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
 498         if (i>u) lua_error(L, "invalid order function for sorting");
 499         lua_pop(L, 1);  /* remove a[i] */
 500       }
 501       /* repeat --j until a[j] <= P */
 502       while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
 503         if (j<l) lua_error(L, "invalid order function for sorting");
 504         lua_pop(L, 1);  /* remove a[j] */
 505       }
 506       if (j<i) {
 507         lua_pop(L, 3);  /* pop pivot, a[i], a[j] */
 508         break;
 509       }
 510       set2(L, i, j);
 511     }
 512     lua_rawgeti(L, 1, u-1);
 513     lua_rawgeti(L, 1, i);
 514     set2(L, u-1, i);  /* swap pivot (a[u-1]) with a[i] */
 515     /* a[l..i-1] <= a[i] == P <= a[i+1..u] */
 516     /* adjust so that smaller "half" is in [j..i] and larger one in [l..u] */
 517     if (i-l < u-i) {
 518       j=l; i=i-1; l=i+2;
 519     }
 520     else {
 521       j=i+1; i=u; u=j-2;
 522     }
 523     auxsort(L, j, i);  /* call recursively the smaller one */
 524   }  /* repeat the routine for the larger one */
 525 }
 526
 527 static int luaB_sort (lua_State *L) {
 528   int n;
 529   luaL_checktype(L, 1, LUA_TTABLE);
 530   n = lua_getn(L, 1);
 531   if (!lua_isnull(L, 2))  /* is there a 2nd argument? */
 532     luaL_checktype(L, 2, LUA_TFUNCTION);
 533   lua_settop(L, 2);  /* make sure there is two arguments */
 534   auxsort(L, 1, n);
 535   return 0;
 536 }
 537
 538 /* }====================================================== */
 539
 540
 541
 542 /*
 543 ** {======================================================
 544 ** Deprecated functions to manipulate global environment.
 545 ** =======================================================
 546 */
 547
 548
 549 #define num_deprecated  4
 550
 551 static const struct luaL_reg deprecated_names [num_deprecated] = {
 552   {"foreachvar", luaB_foreach},
 553   {"nextvar", luaB_next},
 554   {"rawgetglobal", luaB_rawget},
 555   {"rawsetglobal", luaB_rawset}
 556 };
 557
 558
 559 #ifdef LUA_DEPRECATEDFUNCS
 560
 561 /*
 562 ** call corresponding function inserting `globals' as first argument
 563 */
 564 static int deprecated_func (lua_State *L) {
 565   lua_insert(L, 1);  /* upvalue is the function to be called */
 566   lua_getglobals(L);
 567   lua_insert(L, 2);  /* table of globals is 1o argument */
 568   lua_rawcall(L, lua_gettop(L)-1, LUA_MULTRET);
 569   return lua_gettop(L);  /* return all results */
 570 }
 571
 572
 573 static void deprecated_funcs (lua_State *L) {
 574   int i;
 575   for (i=0; i<num_deprecated; i++) {
 576     lua_pushcfunction(L, deprecated_names[i].func);
 577     lua_pushcclosure(L, deprecated_func, 1);
 578     lua_setglobal(L, deprecated_names[i].name);
 579   }
 580 }
 581
 582
 583 #else
 584
 585 /*
 586 ** gives an explicit error in any attempt to call a deprecated function
 587 */
 588 static int deprecated_func (lua_State *L) {
 589   luaL_verror(L, "function `%.20s' is deprecated", lua_tostring(L, -1));
 590   return 0;  /* to avoid warnings */
 591 }
 592
 593
 594 static void deprecated_funcs (lua_State *L) {
 595   int i;
 596   for (i=0; i<num_deprecated; i++) {
 597     lua_pushstring(L, deprecated_names[i].name);
 598     lua_pushcclosure(L, deprecated_func, 1);
 599     lua_setglobal(L, deprecated_names[i].name);
 600   }
 601 }
 602
 603 #endif
 604
 605 /* }====================================================== */
 606
 607 static const struct luaL_reg base_funcs[] = {
 608   {LUA_ALERT, luaB__ALERT},
 609   {LUA_ERRORMESSAGE, luaB__ERRORMESSAGE},
 610   {"call", luaB_call},
 611   {"collectgarbage", luaB_collectgarbage},
 612   {"copytagmethods", luaB_copytagmethods},
 613   {"dofile", luaB_dofile},
 614   {"dostring", luaB_dostring},
 615   {"error", luaB_error},
 616   {"foreach", luaB_foreach},
 617   {"foreachi", luaB_foreachi},
 618   {"gcinfo", luaB_gcinfo},
 619   {"getglobal", luaB_getglobal},
 620   {"gettagmethod", luaB_gettagmethod},
 621   {"globals", luaB_globals},
 622   {"newtag", luaB_newtag},
 623   {"next", luaB_next},
 624   {"print", luaB_print},
 625   {"rawget", luaB_rawget},
 626   {"rawset", luaB_rawset},
 627   {"rawgettable", luaB_rawget},  /* for compatibility */
 628   {"rawsettable", luaB_rawset},  /* for compatibility */
 629   {"setglobal", luaB_setglobal},
 630   {"settag", luaB_settag},
 631   {"settagmethod", luaB_settagmethod},
 632   {"tag", luaB_tag},
 633   {"tonumber", luaB_tonumber},
 634   {"tostring", luaB_tostring},
 635   {"type", luaB_type},
 636   {"assert", luaB_assert},
 637   {"getn", luaB_getn},
 638   {"sort", luaB_sort},
 639   {"tinsert", luaB_tinsert},
 640   {"tremove", luaB_tremove}
 641 };
 642
 643
 644
 645 LUALIB_API void lua_baselibopen (lua_State *L) {
 646   luaL_openl(L, base_funcs);
 647   lua_pushstring(L, LUA_VERSION);
 648   lua_setglobal(L, "_VERSION");
 649   deprecated_funcs(L);
 650 }
 651