package/utils/lua/patches/010-lua-5.1.3-lnum-full-260308.patch

   1 --- a/src/Makefile
   2 +++ b/src/Makefile
   3 @@ -25,7 +25,7 @@ PLATS= aix ansi bsd freebsd generic linu
   4  LUA_A= liblua.a
   5  CORE_O=        lapi.o lcode.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o lmem.o \
   6         lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o ltm.o  \
   7 -       lundump.o lvm.o lzio.o
   8 +       lundump.o lvm.o lzio.o lnum.o
   9  LIB_O= lauxlib.o lbaselib.o ldblib.o liolib.o lmathlib.o loslib.o ltablib.o \
  10         lstrlib.o loadlib.o linit.o
  11
  12 @@ -148,6 +148,7 @@ llex.o: llex.c lua.h luaconf.h ldo.h lob
  13  lmathlib.o: lmathlib.c lua.h luaconf.h lauxlib.h lualib.h
  14  lmem.o: lmem.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h \
  15    ltm.h lzio.h lmem.h ldo.h
  16 +lnum.o: lnum.c lua.h llex.h lnum.h
  17  loadlib.o: loadlib.c lua.h luaconf.h lauxlib.h lualib.h
  18  lobject.o: lobject.c lua.h luaconf.h ldo.h lobject.h llimits.h lstate.h \
  19    ltm.h lzio.h lmem.h lstring.h lgc.h lvm.h
  20 @@ -179,4 +180,18 @@ lzio.o: lzio.c lua.h luaconf.h llimits.h
  21  print.o: print.c ldebug.h lstate.h lua.h luaconf.h lobject.h llimits.h \
  22    ltm.h lzio.h lmem.h lopcodes.h lundump.h
  23
  24 +luaconf.h: lnum_config.h
  25 +lapi.c: lnum.h
  26 +lauxlib.c: llimits.h
  27 +lbaselib.c: llimits.h lobject.h lapi.h
  28 +lcode.c: lnum.h
  29 +liolib.c: lnum.h llex.h
  30 +llex.c: lnum.h
  31 +lnum.h: lobject.h
  32 +lobject.c: llex.h lnum.h
  33 +ltable.c: lnum.h
  34 +lua.c: llimits.h
  35 +lvm.c: llex.h lnum.h
  36 +print.c: lnum.h
  37 +
  38  # (end of Makefile)
  39 --- a/src/lapi.c
  40 +++ b/src/lapi.c
  41 @@ -28,7 +28,7 @@
  42  #include "ltm.h"
  43  #include "lundump.h"
  44  #include "lvm.h"
  45 -
  46 +#include "lnum.h"
  47
  48
  49  const char lua_ident[] =
  50 @@ -241,12 +241,13 @@ LUA_API void lua_pushvalue (lua_State *L
  51
  52  LUA_API int lua_type (lua_State *L, int idx) {
  53    StkId o = index2adr(L, idx);
  54 -  return (o == luaO_nilobject) ? LUA_TNONE : ttype(o);
  55 +  return (o == luaO_nilobject) ? LUA_TNONE : ttype_ext(o);
  56  }
  57
  58
  59  LUA_API const char *lua_typename (lua_State *L, int t) {
  60    UNUSED(L);
  61 +  lua_assert( t!= LUA_TINT );
  62    return (t == LUA_TNONE) ? "no value" : luaT_typenames[t];
  63  }
  64
  65 @@ -264,6 +265,14 @@ LUA_API int lua_isnumber (lua_State *L,
  66  }
  67
  68
  69 +LUA_API int lua_isinteger (lua_State *L, int idx) {
  70 +  TValue tmp;
  71 +  lua_Integer dum;
  72 +  const TValue *o = index2adr(L, idx);
  73 +  return tonumber(o,&tmp) && (ttisint(o) || tt_integer_valued(o,&dum));
  74 +}
  75 +
  76 +
  77  LUA_API int lua_isstring (lua_State *L, int idx) {
  78    int t = lua_type(L, idx);
  79    return (t == LUA_TSTRING || t == LUA_TNUMBER);
  80 @@ -309,31 +318,66 @@ LUA_API int lua_lessthan (lua_State *L,
  81  }
  82
  83
  84 -
  85  LUA_API lua_Number lua_tonumber (lua_State *L, int idx) {
  86    TValue n;
  87    const TValue *o = index2adr(L, idx);
  88 -  if (tonumber(o, &n))
  89 +  if (tonumber(o, &n)) {
  90 +#ifdef LNUM_COMPLEX
  91 +    if (nvalue_img(o) != 0)
  92 +      luaG_runerror(L, "expecting a real number");
  93 +#endif
  94      return nvalue(o);
  95 -  else
  96 -    return 0;
  97 +  }
  98 +  return 0;
  99  }
 100
 101
 102  LUA_API lua_Integer lua_tointeger (lua_State *L, int idx) {
 103    TValue n;
 104 +    /* Lua 5.1 documented behaviour is to return nonzero for non-integer:
 105 +     * "If the number is not an integer, it is truncated in some non-specified way."
 106 +     * I would suggest to change this, to return 0 for anything that would
 107 +     * not fit in 'lua_Integer'.
 108 +     */
 109 +#ifdef LUA_COMPAT_TOINTEGER
 110 +  /* Lua 5.1 compatible */
 111    const TValue *o = index2adr(L, idx);
 112    if (tonumber(o, &n)) {
 113 -    lua_Integer res;
 114 -    lua_Number num = nvalue(o);
 115 -    lua_number2integer(res, num);
 116 -    return res;
 117 +    lua_Integer i;
 118 +    lua_Number d;
 119 +    if (ttisint(o)) return ivalue(o);
 120 +    d= nvalue_fast(o);
 121 +# ifdef LNUM_COMPLEX
 122 +    if (nvalue_img_fast(o) != 0)
 123 +      luaG_runerror(L, "expecting a real number");
 124 +# endif
 125 +    lua_number2integer(i, d);
 126 +    return i;
 127    }
 128 -  else
 129 -    return 0;
 130 +#else
 131 +  /* New suggestion */
 132 +  const TValue *o = index2adr(L, idx);
 133 +  if (tonumber(o, &n)) {
 134 +    lua_Integer i;
 135 +    if (ttisint(o)) return ivalue(o);
 136 +    if (tt_integer_valued(o,&i)) return i;
 137 +  }
 138 +#endif
 139 +  return 0;
 140  }
 141
 142
 143 +#ifdef LNUM_COMPLEX
 144 +LUA_API lua_Complex lua_tocomplex (lua_State *L, int idx) {
 145 +  TValue tmp;
 146 +  const TValue *o = index2adr(L, idx);
 147 +  if (tonumber(o, &tmp))
 148 +    return nvalue_complex(o);
 149 +  return 0;
 150 +}
 151 +#endif
 152 +
 153 +
 154  LUA_API int lua_toboolean (lua_State *L, int idx) {
 155    const TValue *o = index2adr(L, idx);
 156    return !l_isfalse(o);
 157 @@ -364,6 +408,7 @@ LUA_API size_t lua_objlen (lua_State *L,
 158      case LUA_TSTRING: return tsvalue(o)->len;
 159      case LUA_TUSERDATA: return uvalue(o)->len;
 160      case LUA_TTABLE: return luaH_getn(hvalue(o));
 161 +    case LUA_TINT:
 162      case LUA_TNUMBER: {
 163        size_t l;
 164        lua_lock(L);  /* `luaV_tostring' may create a new string */
 165 @@ -426,6 +471,8 @@ LUA_API void lua_pushnil (lua_State *L)
 166  }
 167
 168
 169 +/* 'lua_pushnumber()' may lose accuracy on integers, 'lua_pushinteger' will not.
 170 + */
 171  LUA_API void lua_pushnumber (lua_State *L, lua_Number n) {
 172    lua_lock(L);
 173    setnvalue(L->top, n);
 174 @@ -434,12 +481,22 @@ LUA_API void lua_pushnumber (lua_State *
 175  }
 176
 177
 178 -LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) {
 179 +LUA_API void lua_pushinteger (lua_State *L, lua_Integer i) {
 180 +  lua_lock(L);
 181 +  setivalue(L->top, i);
 182 +  api_incr_top(L);
 183 +  lua_unlock(L);
 184 +}
 185 +
 186 +
 187 +#ifdef LNUM_COMPLEX
 188 +LUA_API void lua_pushcomplex (lua_State *L, lua_Complex v) {
 189    lua_lock(L);
 190 -  setnvalue(L->top, cast_num(n));
 191 +  setnvalue_complex( L->top, v );
 192    api_incr_top(L);
 193    lua_unlock(L);
 194  }
 195 +#endif
 196
 197
 198  LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) {
 199 @@ -569,7 +626,7 @@ LUA_API void lua_rawgeti (lua_State *L,
 200    lua_lock(L);
 201    o = index2adr(L, idx);
 202    api_check(L, ttistable(o));
 203 -  setobj2s(L, L->top, luaH_getnum(hvalue(o), n));
 204 +  setobj2s(L, L->top, luaH_getint(hvalue(o), n));
 205    api_incr_top(L);
 206    lua_unlock(L);
 207  }
 208 @@ -597,6 +654,9 @@ LUA_API int lua_getmetatable (lua_State
 209      case LUA_TUSERDATA:
 210        mt = uvalue(obj)->metatable;
 211        break;
 212 +    case LUA_TINT:
 213 +      mt = G(L)->mt[LUA_TNUMBER];
 214 +      break;
 215      default:
 216        mt = G(L)->mt[ttype(obj)];
 217        break;
 218 @@ -687,7 +747,7 @@ LUA_API void lua_rawseti (lua_State *L,
 219    api_checknelems(L, 1);
 220    o = index2adr(L, idx);
 221    api_check(L, ttistable(o));
 222 -  setobj2t(L, luaH_setnum(L, hvalue(o), n), L->top-1);
 223 +  setobj2t(L, luaH_setint(L, hvalue(o), n), L->top-1);
 224    luaC_barriert(L, hvalue(o), L->top-1);
 225    L->top--;
 226    lua_unlock(L);
 227 @@ -721,7 +781,7 @@ LUA_API int lua_setmetatable (lua_State
 228        break;
 229      }
 230      default: {
 231 -      G(L)->mt[ttype(obj)] = mt;
 232 +      G(L)->mt[ttype_ext(obj)] = mt;
 233        break;
 234      }
 235    }
 236 @@ -1085,3 +1145,32 @@ LUA_API const char *lua_setupvalue (lua_
 237    return name;
 238  }
 239
 240 +
 241 +/* Help function for 'luaB_tonumber()', avoids multiple str->number
 242 + * conversions for Lua "tonumber()".
 243 + *
 244 + * Also pushes floating point numbers with integer value as integer, which
 245 + * can be used by 'tonumber()' in scripts to bring values back to integer
 246 + * realm.
 247 + *
 248 + * Note: The 'back to integer realm' is _not_ to affect string conversions:
 249 + * 'tonumber("4294967295.1")' should give a floating point value, although
 250 + * the value would be 4294967296 (and storable in int64 realm).
 251 + */
 252 +int lua_pushvalue_as_number (lua_State *L, int idx)
 253 +{
 254 +  const TValue *o = index2adr(L, idx);
 255 +  TValue tmp;
 256 +  lua_Integer i;
 257 +  if (ttisnumber(o)) {
 258 +    if ( (!ttisint(o)) && tt_integer_valued(o,&i)) {
 259 +      lua_pushinteger( L, i );
 260 +      return 1;
 261 +    }
 262 +  } else if (!tonumber(o, &tmp)) {
 263 +    return 0;
 264 +  }
 265 +  if (ttisint(o)) lua_pushinteger( L, ivalue(o) );
 266 +  else lua_pushnumber( L, nvalue_fast(o) );
 267 +  return 1;
 268 +}
 269 --- a/src/lapi.h
 270 +++ b/src/lapi.h
 271 @@ -13,4 +13,6 @@
 272
 273  LUAI_FUNC void luaA_pushobject (lua_State *L, const TValue *o);
 274
 275 +int lua_pushvalue_as_number (lua_State *L, int idx);
 276 +
 277  #endif
 278 --- a/src/lauxlib.c
 279 +++ b/src/lauxlib.c
 280 @@ -23,7 +23,7 @@
 281  #include "lua.h"
 282
 283  #include "lauxlib.h"
 284 -
 285 +#include "llimits.h"
 286
 287  #define FREELIST_REF   0       /* free list of references */
 288
 289 @@ -66,7 +66,7 @@ LUALIB_API int luaL_typerror (lua_State
 290
 291
 292  static void tag_error (lua_State *L, int narg, int tag) {
 293 -  luaL_typerror(L, narg, lua_typename(L, tag));
 294 +  luaL_typerror(L, narg, tag==LUA_TINT ? "integer" : lua_typename(L, tag));
 295  }
 296
 297
 298 @@ -188,8 +188,8 @@ LUALIB_API lua_Number luaL_optnumber (lu
 299
 300  LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) {
 301    lua_Integer d = lua_tointeger(L, narg);
 302 -  if (d == 0 && !lua_isnumber(L, narg))  /* avoid extra test when d is not 0 */
 303 -    tag_error(L, narg, LUA_TNUMBER);
 304 +  if (d == 0 && !lua_isinteger(L, narg))  /* avoid extra test when d is not 0 */
 305 +    tag_error(L, narg, LUA_TINT);
 306    return d;
 307  }
 308
 309 @@ -200,6 +200,16 @@ LUALIB_API lua_Integer luaL_optinteger (
 310  }
 311
 312
 313 +#ifdef LNUM_COMPLEX
 314 +LUALIB_API lua_Complex luaL_checkcomplex (lua_State *L, int narg) {
 315 +  lua_Complex c = lua_tocomplex(L, narg);
 316 +  if (c == 0 && !lua_isnumber(L, narg))  /* avoid extra test when c is not 0 */
 317 +    tag_error(L, narg, LUA_TNUMBER);
 318 +  return c;
 319 +}
 320 +#endif
 321 +
 322 +
 323  LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
 324    if (!lua_getmetatable(L, obj))  /* no metatable? */
 325      return 0;
 326 --- a/src/lauxlib.h
 327 +++ b/src/lauxlib.h
 328 @@ -57,6 +57,12 @@ LUALIB_API lua_Number (luaL_optnumber) (
 329  LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
 330  LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
 331                                            lua_Integer def);
 332 +#define luaL_checkint32(L,narg) ((int)luaL_checkinteger(L,narg))
 333 +#define luaL_optint32(L,narg,def) ((int)luaL_optinteger(L,narg,def))
 334 +
 335 +#ifdef LNUM_COMPLEX
 336 +  LUALIB_API lua_Complex (luaL_checkcomplex) (lua_State *L, int narg);
 337 +#endif
 338
 339  LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
 340  LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
 341 --- a/src/lbaselib.c
 342 +++ b/src/lbaselib.c
 343 @@ -18,7 +18,9 @@
 344
 345  #include "lauxlib.h"
 346  #include "lualib.h"
 347 -
 348 +#include "llimits.h"
 349 +#include "lobject.h"
 350 +#include "lapi.h"
 351
 352
 353
 354 @@ -54,20 +56,25 @@ static int luaB_tonumber (lua_State *L)
 355    int base = luaL_optint(L, 2, 10);
 356    if (base == 10) {  /* standard conversion */
 357      luaL_checkany(L, 1);
 358 -    if (lua_isnumber(L, 1)) {
 359 -      lua_pushnumber(L, lua_tonumber(L, 1));
 360 +    if (lua_isnumber(L, 1)) {       /* numeric string, or a number */
 361 +      lua_pushvalue_as_number(L,1);     /* API extension (not to lose accuracy here) */
 362        return 1;
 363 -    }
 364 +       }
 365    }
 366    else {
 367      const char *s1 = luaL_checkstring(L, 1);
 368      char *s2;
 369 -    unsigned long n;
 370 +    unsigned LUA_INTEGER n;
 371      luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
 372 -    n = strtoul(s1, &s2, base);
 373 +    n = lua_str2ul(s1, &s2, base);
 374      if (s1 != s2) {  /* at least one valid digit? */
 375        while (isspace((unsigned char)(*s2))) s2++;  /* skip trailing spaces */
 376        if (*s2 == '\0') {  /* no invalid trailing characters? */
 377 +
 378 +               /* Push as number, there needs to be separate 'luaB_tointeger' for
 379 +                * when the caller wants to preserve the bits (matters if unsigned
 380 +                * values are used).
 381 +                */
 382          lua_pushnumber(L, (lua_Number)n);
 383          return 1;
 384        }
 385 @@ -144,7 +151,7 @@ static int luaB_setfenv (lua_State *L) {
 386    luaL_checktype(L, 2, LUA_TTABLE);
 387    getfunc(L, 0);
 388    lua_pushvalue(L, 2);
 389 -  if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0) {
 390 +  if (lua_isnumber(L, 1) && lua_tointeger(L, 1) == 0) {
 391      /* change environment of current thread */
 392      lua_pushthread(L);
 393      lua_insert(L, -2);
 394 @@ -209,7 +216,7 @@ static int luaB_collectgarbage (lua_Stat
 395        return 1;
 396      }
 397      default: {
 398 -      lua_pushnumber(L, res);
 399 +      lua_pushinteger(L, res);
 400        return 1;
 401      }
 402    }
 403 @@ -631,6 +638,8 @@ static void base_open (lua_State *L) {
 404    luaL_register(L, "_G", base_funcs);
 405    lua_pushliteral(L, LUA_VERSION);
 406    lua_setglobal(L, "_VERSION");  /* set global _VERSION */
 407 +  lua_pushliteral(L, LUA_LNUM);
 408 +  lua_setglobal(L, "_LNUM");  /* "[complex] double|float|ldouble int32|int64" */
 409    /* `ipairs' and `pairs' need auxiliary functions as upvalues */
 410    auxopen(L, "ipairs", luaB_ipairs, ipairsaux);
 411    auxopen(L, "pairs", luaB_pairs, luaB_next);
 412 --- a/src/lcode.c
 413 +++ b/src/lcode.c
 414 @@ -22,13 +22,18 @@
 415  #include "lopcodes.h"
 416  #include "lparser.h"
 417  #include "ltable.h"
 418 +#include "lnum.h"
 419
 420
 421  #define hasjumps(e)    ((e)->t != (e)->f)
 422
 423 -
 424  static int isnumeral(expdesc *e) {
 425 -  return (e->k == VKNUM && e->t == NO_JUMP && e->f == NO_JUMP);
 426 +  int ek=
 427 +#ifdef LNUM_COMPLEX
 428 +    (e->k == VKNUM2) ||
 429 +#endif
 430 +    (e->k == VKINT) || (e->k == VKNUM);
 431 +  return (ek && e->t == NO_JUMP && e->f == NO_JUMP);
 432  }
 433
 434
 435 @@ -231,12 +236,16 @@ static int addk (FuncState *fs, TValue *
 436    TValue *idx = luaH_set(L, fs->h, k);
 437    Proto *f = fs->f;
 438    int oldsize = f->sizek;
 439 -  if (ttisnumber(idx)) {
 440 -    lua_assert(luaO_rawequalObj(&fs->f->k[cast_int(nvalue(idx))], v));
 441 -    return cast_int(nvalue(idx));
 442 +  if (ttype(idx)==LUA_TNUMBER) {
 443 +    luai_normalize(idx);
 444 +    lua_assert( ttype(idx)==LUA_TINT );     /* had no fraction */
 445 +  }
 446 +  if (ttisint(idx)) {
 447 +    lua_assert(luaO_rawequalObj(&fs->f->k[ivalue(idx)], v));
 448 +    return cast_int(ivalue(idx));
 449    }
 450    else {  /* constant not found; create a new entry */
 451 -    setnvalue(idx, cast_num(fs->nk));
 452 +    setivalue(idx, fs->nk);
 453      luaM_growvector(L, f->k, fs->nk, f->sizek, TValue,
 454                      MAXARG_Bx, "constant table overflow");
 455      while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
 456 @@ -261,6 +270,21 @@ int luaK_numberK (FuncState *fs, lua_Num
 457  }
 458
 459
 460 +int luaK_integerK (FuncState *fs, lua_Integer r) {
 461 +  TValue o;
 462 +  setivalue(&o, r);
 463 +  return addk(fs, &o, &o);
 464 +}
 465 +
 466 +
 467 +#ifdef LNUM_COMPLEX
 468 +static int luaK_imagK (FuncState *fs, lua_Number r) {
 469 +  TValue o;
 470 +  setnvalue_complex(&o, r*I);
 471 +  return addk(fs, &o, &o);
 472 +}
 473 +#endif
 474 +
 475  static int boolK (FuncState *fs, int b) {
 476    TValue o;
 477    setbvalue(&o, b);
 478 @@ -359,6 +383,16 @@ static void discharge2reg (FuncState *fs
 479        luaK_codeABx(fs, OP_LOADK, reg, luaK_numberK(fs, e->u.nval));
 480        break;
 481      }
 482 +    case VKINT: {
 483 +      luaK_codeABx(fs, OP_LOADK, reg, luaK_integerK(fs, e->u.ival));
 484 +      break;
 485 +    }
 486 +#ifdef LNUM_COMPLEX
 487 +    case VKNUM2: {
 488 +      luaK_codeABx(fs, OP_LOADK, reg, luaK_imagK(fs, e->u.nval));
 489 +      break;
 490 +    }
 491 +#endif
 492      case VRELOCABLE: {
 493        Instruction *pc = &getcode(fs, e);
 494        SETARG_A(*pc, reg);
 495 @@ -444,6 +478,10 @@ void luaK_exp2val (FuncState *fs, expdes
 496  int luaK_exp2RK (FuncState *fs, expdesc *e) {
 497    luaK_exp2val(fs, e);
 498    switch (e->k) {
 499 +#ifdef LNUM_COMPLEX
 500 +    case VKNUM2:
 501 +#endif
 502 +    case VKINT:
 503      case VKNUM:
 504      case VTRUE:
 505      case VFALSE:
 506 @@ -451,6 +489,10 @@ int luaK_exp2RK (FuncState *fs, expdesc
 507        if (fs->nk <= MAXINDEXRK) {  /* constant fit in RK operand? */
 508          e->u.s.info = (e->k == VNIL)  ? nilK(fs) :
 509                        (e->k == VKNUM) ? luaK_numberK(fs, e->u.nval) :
 510 +                      (e->k == VKINT) ? luaK_integerK(fs, e->u.ival) :
 511 +#ifdef LNUM_COMPLEX
 512 +                      (e->k == VKNUM2) ? luaK_imagK(fs, e->u.nval) :
 513 +#endif
 514                                          boolK(fs, (e->k == VTRUE));
 515          e->k = VK;
 516          return RKASK(e->u.s.info);
 517 @@ -540,7 +582,10 @@ void luaK_goiftrue (FuncState *fs, expde
 518    int pc;  /* pc of last jump */
 519    luaK_dischargevars(fs, e);
 520    switch (e->k) {
 521 -    case VK: case VKNUM: case VTRUE: {
 522 +#ifdef LNUM_COMPLEX
 523 +    case VKNUM2:
 524 +#endif
 525 +    case VKINT: case VK: case VKNUM: case VTRUE: {
 526        pc = NO_JUMP;  /* always true; do nothing */
 527        break;
 528      }
 529 @@ -590,7 +635,10 @@ static void codenot (FuncState *fs, expd
 530        e->k = VTRUE;
 531        break;
 532      }
 533 -    case VK: case VKNUM: case VTRUE: {
 534 +#ifdef LNUM_COMPLEX
 535 +    case VKNUM2:
 536 +#endif
 537 +    case VKINT: case VK: case VKNUM: case VTRUE: {
 538        e->k = VFALSE;
 539        break;
 540      }
 541 @@ -626,25 +674,70 @@ void luaK_indexed (FuncState *fs, expdes
 542
 543  static int constfolding (OpCode op, expdesc *e1, expdesc *e2) {
 544    lua_Number v1, v2, r;
 545 +  int vkres= VKNUM;
 546    if (!isnumeral(e1) || !isnumeral(e2)) return 0;
 547 -  v1 = e1->u.nval;
 548 -  v2 = e2->u.nval;
 549 +
 550 +  /* real and imaginary parts don't mix. */
 551 +#ifdef LNUM_COMPLEX
 552 +  if (e1->k == VKNUM2) {
 553 +    if ((op != OP_UNM) && (e2->k != VKNUM2)) return 0;
 554 +    vkres= VKNUM2; }
 555 +  else if (e2->k == VKNUM2) { return 0; }
 556 +#endif
 557 +  if ((e1->k == VKINT) && (e2->k == VKINT)) {
 558 +    lua_Integer i1= e1->u.ival, i2= e2->u.ival;
 559 +    lua_Integer rr;
 560 +    int done= 0;
 561 +    /* Integer/integer calculations (may end up producing floating point) */
 562 +    switch (op) {
 563 +      case OP_ADD: done= try_addint( &rr, i1, i2 ); break;
 564 +      case OP_SUB: done= try_subint( &rr, i1, i2 ); break;
 565 +      case OP_MUL: done= try_mulint( &rr, i1, i2 ); break;
 566 +      case OP_DIV: done= try_divint( &rr, i1, i2 ); break;
 567 +      case OP_MOD: done= try_modint( &rr, i1, i2 ); break;
 568 +      case OP_POW: done= try_powint( &rr, i1, i2 ); break;
 569 +      case OP_UNM: done= try_unmint( &rr, i1 ); break;
 570 +      default:     done= 0; break;
 571 +    }
 572 +    if (done) {
 573 +      e1->u.ival = rr;  /* remained within integer range */
 574 +      return 1;
 575 +    }
 576 +  }
 577 +  v1 = (e1->k == VKINT) ? ((lua_Number)e1->u.ival) : e1->u.nval;
 578 +  v2 = (e2->k == VKINT) ? ((lua_Number)e2->u.ival) : e2->u.nval;
 579 +
 580    switch (op) {
 581      case OP_ADD: r = luai_numadd(v1, v2); break;
 582      case OP_SUB: r = luai_numsub(v1, v2); break;
 583 -    case OP_MUL: r = luai_nummul(v1, v2); break;
 584 +    case OP_MUL:
 585 +#ifdef LNUM_COMPLEX
 586 +        if (vkres==VKNUM2) return 0;    /* leave to runtime (could do here, but not worth it?) */
 587 +#endif
 588 +        r = luai_nummul(v1, v2); break;
 589      case OP_DIV:
 590        if (v2 == 0) return 0;  /* do not attempt to divide by 0 */
 591 -      r = luai_numdiv(v1, v2); break;
 592 +#ifdef LNUM_COMPLEX
 593 +        if (vkres==VKNUM2) return 0;    /* leave to runtime */
 594 +#endif
 595 +        r = luai_numdiv(v1, v2); break;
 596      case OP_MOD:
 597        if (v2 == 0) return 0;  /* do not attempt to divide by 0 */
 598 +#ifdef LNUM_COMPLEX
 599 +      if (vkres==VKNUM2) return 0;    /* leave to runtime */
 600 +#endif
 601        r = luai_nummod(v1, v2); break;
 602 -    case OP_POW: r = luai_numpow(v1, v2); break;
 603 +    case OP_POW:
 604 +#ifdef LNUM_COMPLEX
 605 +      if (vkres==VKNUM2) return 0;    /* leave to runtime */
 606 +#endif
 607 +      r = luai_numpow(v1, v2); break;
 608      case OP_UNM: r = luai_numunm(v1); break;
 609      case OP_LEN: return 0;  /* no constant folding for 'len' */
 610      default: lua_assert(0); r = 0; break;
 611    }
 612    if (luai_numisnan(r)) return 0;  /* do not attempt to produce NaN */
 613 +  e1->k = cast(expkind,vkres);
 614    e1->u.nval = r;
 615    return 1;
 616  }
 617 @@ -688,7 +781,8 @@ static void codecomp (FuncState *fs, OpC
 618
 619  void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {
 620    expdesc e2;
 621 -  e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;
 622 +  e2.t = e2.f = NO_JUMP; e2.k = VKINT; e2.u.ival = 0;
 623 +
 624    switch (op) {
 625      case OPR_MINUS: {
 626        if (!isnumeral(e))
 627 --- a/src/lcode.h
 628 +++ b/src/lcode.h
 629 @@ -71,6 +71,6 @@ LUAI_FUNC void luaK_prefix (FuncState *f
 630  LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
 631  LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1, expdesc *v2);
 632  LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore);
 633 -
 634 +LUAI_FUNC int luaK_integerK (FuncState *fs, lua_Integer r);
 635
 636  #endif
 637 --- a/src/ldebug.c
 638 +++ b/src/ldebug.c
 639 @@ -183,7 +183,7 @@ static void collectvalidlines (lua_State
 640      int *lineinfo = f->l.p->lineinfo;
 641      int i;
 642      for (i=0; i<f->l.p->sizelineinfo; i++)
 643 -      setbvalue(luaH_setnum(L, t, lineinfo[i]), 1);
 644 +      setbvalue(luaH_setint(L, t, lineinfo[i]), 1);
 645      sethvalue(L, L->top, t);
 646    }
 647    incr_top(L);
 648 @@ -566,7 +566,7 @@ static int isinstack (CallInfo *ci, cons
 649
 650  void luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
 651    const char *name = NULL;
 652 -  const char *t = luaT_typenames[ttype(o)];
 653 +  const char *t = luaT_typenames[ttype_ext(o)];
 654    const char *kind = (isinstack(L->ci, o)) ?
 655                           getobjname(L, L->ci, cast_int(o - L->base), &name) :
 656                           NULL;
 657 @@ -594,8 +594,8 @@ void luaG_aritherror (lua_State *L, cons
 658
 659
 660  int luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
 661 -  const char *t1 = luaT_typenames[ttype(p1)];
 662 -  const char *t2 = luaT_typenames[ttype(p2)];
 663 +  const char *t1 = luaT_typenames[ttype_ext(p1)];
 664 +  const char *t2 = luaT_typenames[ttype_ext(p2)];
 665    if (t1[2] == t2[2])
 666      luaG_runerror(L, "attempt to compare two %s values", t1);
 667    else
 668 --- a/src/ldo.c
 669 +++ b/src/ldo.c
 670 @@ -220,9 +220,9 @@ static StkId adjust_varargs (lua_State *
 671      luaD_checkstack(L, p->maxstacksize);
 672      htab = luaH_new(L, nvar, 1);  /* create `arg' table */
 673      for (i=0; i<nvar; i++)  /* put extra arguments into `arg' table */
 674 -      setobj2n(L, luaH_setnum(L, htab, i+1), L->top - nvar + i);
 675 +      setobj2n(L, luaH_setint(L, htab, i+1), L->top - nvar + i);
 676      /* store counter in field `n' */
 677 -    setnvalue(luaH_setstr(L, htab, luaS_newliteral(L, "n")), cast_num(nvar));
 678 +    setivalue(luaH_setstr(L, htab, luaS_newliteral(L, "n")), nvar);
 679    }
 680  #endif
 681    /* move fixed parameters to final position */
 682 --- a/src/ldump.c
 683 +++ b/src/ldump.c
 684 @@ -52,6 +52,11 @@ static void DumpNumber(lua_Number x, Dum
 685   DumpVar(x,D);
 686  }
 687
 688 +static void DumpInteger(lua_Integer x, DumpState* D)
 689 +{
 690 + DumpVar(x,D);
 691 +}
 692 +
 693  static void DumpVector(const void* b, int n, size_t size, DumpState* D)
 694  {
 695   DumpInt(n,D);
 696 @@ -93,8 +98,11 @@ static void DumpConstants(const Proto* f
 697         DumpChar(bvalue(o),D);
 698         break;
 699     case LUA_TNUMBER:
 700 -       DumpNumber(nvalue(o),D);
 701 +       DumpNumber(nvalue_fast(o),D);
 702         break;
 703 +   case LUA_TINT:
 704 +       DumpInteger(ivalue(o),D);
 705 +    break;
 706     case LUA_TSTRING:
 707         DumpString(rawtsvalue(o),D);
 708         break;
 709 --- a/src/liolib.c
 710 +++ b/src/liolib.c
 711 @@ -9,6 +9,7 @@
 712  #include <stdio.h>
 713  #include <stdlib.h>
 714  #include <string.h>
 715 +#include <ctype.h>
 716
 717  #define liolib_c
 718  #define LUA_LIB
 719 @@ -18,7 +19,8 @@
 720  #include "lauxlib.h"
 721  #include "lualib.h"
 722
 723 -
 724 +#include "lnum.h"
 725 +#include "llex.h"
 726
 727  #define IO_INPUT       1
 728  #define IO_OUTPUT      2
 729 @@ -269,6 +271,13 @@ static int io_lines (lua_State *L) {
 730  ** =======================================================
 731  */
 732
 733 +/*
 734 +* Many problems if we intend the same 'n' format specifier (see 'file:read()')
 735 +* to work for both FP and integer numbers, without losing their accuracy. So
 736 +* we don't. 'n' reads numbers as floating points, 'i' as integers. Old code
 737 +* remains valid, but won't provide full integer accuracy (this only matters
 738 +* with float FP and/or 64-bit integers).
 739 +*/
 740
 741  static int read_number (lua_State *L, FILE *f) {
 742    lua_Number d;
 743 @@ -282,6 +291,43 @@ static int read_number (lua_State *L, FI
 744    }
 745  }
 746
 747 +static int read_integer (lua_State *L, FILE *f) {
 748 +  lua_Integer i;
 749 +  if (fscanf(f, LUA_INTEGER_SCAN, &i) == 1) {
 750 +    lua_pushinteger(L, i);
 751 +    return 1;
 752 +  }
 753 +  else return 0;  /* read fails */
 754 +}
 755 +
 756 +#ifdef LNUM_COMPLEX
 757 +static int read_complex (lua_State *L, FILE *f) {
 758 +  /* NNN / NNNi / NNN+MMMi / NNN-MMMi */
 759 +  lua_Number a,b;
 760 +  if (fscanf(f, LUA_NUMBER_SCAN, &a) == 1) {
 761 +    int c=fgetc(f);
 762 +    switch(c) {
 763 +        case 'i':
 764 +            lua_pushcomplex(L, a*I);
 765 +            return 1;
 766 +        case '+':
 767 +        case '-':
 768 +            /* "i" is consumed if at the end; just 'NNN+MMM' will most likely
 769 +             * behave as if "i" was there? (TBD: test)
 770 +             */
 771 +            if (fscanf(f, LUA_NUMBER_SCAN "i", &b) == 1) {
 772 +                lua_pushcomplex(L, a+ (c=='+' ? b:-b)*I);
 773 +                return 1;
 774 +            }
 775 +    }
 776 +    ungetc( c,f );
 777 +    lua_pushnumber(L,a);  /*real part only*/
 778 +    return 1;
 779 +  }
 780 +  return 0;  /* read fails */
 781 +}
 782 +#endif
 783 +
 784
 785  static int test_eof (lua_State *L, FILE *f) {
 786    int c = getc(f);
 787 @@ -355,6 +401,14 @@ static int g_read (lua_State *L, FILE *f
 788            case 'n':  /* number */
 789              success = read_number(L, f);
 790              break;
 791 +          case 'i':  /* integer (full accuracy) */
 792 +            success = read_integer(L, f);
 793 +            break;
 794 +#ifdef LNUM_COMPLEX
 795 +          case 'c':  /* complex */
 796 +            success = read_complex(L, f);
 797 +            break;
 798 +#endif
 799            case 'l':  /* line */
 800              success = read_line(L, f);
 801              break;
 802 @@ -415,9 +469,10 @@ static int g_write (lua_State *L, FILE *
 803    int status = 1;
 804    for (; nargs--; arg++) {
 805      if (lua_type(L, arg) == LUA_TNUMBER) {
 806 -      /* optimization: could be done exactly as for strings */
 807 -      status = status &&
 808 -          fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
 809 +      if (lua_isinteger(L,arg))
 810 +          status = status && fprintf(f, LUA_INTEGER_FMT, lua_tointeger(L, arg)) > 0;
 811 +      else
 812 +          status = status && fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
 813      }
 814      else {
 815        size_t l;
 816 @@ -460,7 +515,7 @@ static int f_setvbuf (lua_State *L) {
 817    static const char *const modenames[] = {"no", "full", "line", NULL};
 818    FILE *f = tofile(L);
 819    int op = luaL_checkoption(L, 2, NULL, modenames);
 820 -  lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
 821 +  size_t sz = luaL_optint32(L, 3, LUAL_BUFFERSIZE);
 822    int res = setvbuf(f, NULL, mode[op], sz);
 823    return pushresult(L, res == 0, NULL);
 824  }
 825 --- a/src/llex.c
 826 +++ b/src/llex.c
 827 @@ -22,6 +22,7 @@
 828  #include "lstring.h"
 829  #include "ltable.h"
 830  #include "lzio.h"
 831 +#include "lnum.h"
 832
 833
 834
 835 @@ -34,13 +35,17 @@
 836
 837
 838  /* ORDER RESERVED */
 839 -const char *const luaX_tokens [] = {
 840 +static const char *const luaX_tokens [] = {
 841      "and", "break", "do", "else", "elseif",
 842      "end", "false", "for", "function", "if",
 843      "in", "local", "nil", "not", "or", "repeat",
 844      "return", "then", "true", "until", "while",
 845      "..", "...", "==", ">=", "<=", "~=",
 846      "<number>", "<name>", "<string>", "<eof>",
 847 +    "<integer>",
 848 +#ifdef LNUM_COMPLEX
 849 +    "<number2>",
 850 +#endif
 851      NULL
 852  };
 853
 854 @@ -90,7 +95,11 @@ static const char *txtToken (LexState *l
 855    switch (token) {
 856      case TK_NAME:
 857      case TK_STRING:
 858 +    case TK_INT:
 859      case TK_NUMBER:
 860 +#ifdef LNUM_COMPLEX
 861 +    case TK_NUMBER2:
 862 +#endif
 863        save(ls, '\0');
 864        return luaZ_buffer(ls->buff);
 865      default:
 866 @@ -175,23 +184,27 @@ static void buffreplace (LexState *ls, c
 867      if (p[n] == from) p[n] = to;
 868  }
 869
 870 -
 871 -static void trydecpoint (LexState *ls, SemInfo *seminfo) {
 872 +/* TK_NUMBER (/ TK_NUMBER2) */
 873 +static int trydecpoint (LexState *ls, SemInfo *seminfo) {
 874    /* format error: try to update decimal point separator */
 875    struct lconv *cv = localeconv();
 876    char old = ls->decpoint;
 877 +  int ret;
 878    ls->decpoint = (cv ? cv->decimal_point[0] : '.');
 879    buffreplace(ls, old, ls->decpoint);  /* try updated decimal separator */
 880 -  if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r)) {
 881 +  ret= luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r, NULL);
 882 +  if (!ret) {
 883      /* format error with correct decimal point: no more options */
 884      buffreplace(ls, ls->decpoint, '.');  /* undo change (for error message) */
 885      luaX_lexerror(ls, "malformed number", TK_NUMBER);
 886    }
 887 +  return ret;
 888  }
 889
 890
 891 -/* LUA_NUMBER */
 892 -static void read_numeral (LexState *ls, SemInfo *seminfo) {
 893 +/* TK_NUMBER / TK_INT (/TK_NUMBER2) */
 894 +static int read_numeral (LexState *ls, SemInfo *seminfo) {
 895 +  int ret;
 896    lua_assert(isdigit(ls->current));
 897    do {
 898      save_and_next(ls);
 899 @@ -202,8 +215,9 @@ static void read_numeral (LexState *ls,
 900      save_and_next(ls);
 901    save(ls, '\0');
 902    buffreplace(ls, '.', ls->decpoint);  /* follow locale for decimal point */
 903 -  if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r))  /* format error? */
 904 -    trydecpoint(ls, seminfo); /* try to update decimal point separator */
 905 +  ret= luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r, &seminfo->i );
 906 +  if (!ret) return trydecpoint(ls, seminfo); /* try to update decimal point separator */
 907 +  return ret;
 908  }
 909
 910
 911 @@ -331,6 +345,7 @@ static void read_string (LexState *ls, i
 912  }
 913
 914
 915 +/* char / TK_* */
 916  static int llex (LexState *ls, SemInfo *seminfo) {
 917    luaZ_resetbuffer(ls->buff);
 918    for (;;) {
 919 @@ -402,8 +417,7 @@ static int llex (LexState *ls, SemInfo *
 920          }
 921          else if (!isdigit(ls->current)) return '.';
 922          else {
 923 -          read_numeral(ls, seminfo);
 924 -          return TK_NUMBER;
 925 +          return read_numeral(ls, seminfo);
 926          }
 927        }
 928        case EOZ: {
 929 @@ -416,8 +430,7 @@ static int llex (LexState *ls, SemInfo *
 930            continue;
 931          }
 932          else if (isdigit(ls->current)) {
 933 -          read_numeral(ls, seminfo);
 934 -          return TK_NUMBER;
 935 +          return read_numeral(ls, seminfo);
 936          }
 937          else if (isalpha(ls->current) || ls->current == '_') {
 938            /* identifier or reserved word */
 939 --- a/src/llex.h
 940 +++ b/src/llex.h
 941 @@ -29,19 +29,22 @@ enum RESERVED {
 942    TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
 943    /* other terminal symbols */
 944    TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER,
 945 -  TK_NAME, TK_STRING, TK_EOS
 946 +  TK_NAME, TK_STRING, TK_EOS, TK_INT
 947 +#ifdef LNUM_COMPLEX
 948 +  , TK_NUMBER2   /* imaginary constants: Ni */
 949 +#endif
 950  };
 951
 952  /* number of reserved words */
 953  #define NUM_RESERVED   (cast(int, TK_WHILE-FIRST_RESERVED+1))
 954
 955
 956 -/* array with token `names' */
 957 -LUAI_DATA const char *const luaX_tokens [];
 958 -
 959 -
 960 +/* SemInfo is a local data structure of 'llex.c', used for carrying a string
 961 + * or a number. A separate token (TK_*) will tell, how to interpret the data.
 962 + */
 963  typedef union {
 964    lua_Number r;
 965 +  lua_Integer i;
 966    TString *ts;
 967  } SemInfo;  /* semantics information */
 968
 969 --- a/src/llimits.h
 970 +++ b/src/llimits.h
 971 @@ -49,6 +49,7 @@ typedef LUAI_USER_ALIGNMENT_T L_Umaxalig
 972
 973  /* result of a `usual argument conversion' over lua_Number */
 974  typedef LUAI_UACNUMBER l_uacNumber;
 975 +typedef LUAI_UACINTEGER l_uacInteger;
 976
 977
 978  /* internal assertions for in-house debugging */
 979 @@ -80,7 +81,6 @@ typedef LUAI_UACNUMBER l_uacNumber;
 980  #define cast_int(i)    cast(int, (i))
 981
 982
 983 -
 984  /*
 985  ** type for virtual-machine instructions
 986  ** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
 987 --- a/src/lmathlib.c
 988 +++ b/src/lmathlib.c
 989 @@ -4,7 +4,6 @@
 990  ** See Copyright Notice in lua.h
 991  */
 992
 993 -
 994  #include <stdlib.h>
 995  #include <math.h>
 996
 997 @@ -16,113 +15,210 @@
 998  #include "lauxlib.h"
 999  #include "lualib.h"
1000
1001 +/* 'luai_vectpow()' as a replacement for 'cpow()'. Defined in the header; we
1002 + * don't intrude the code libs internal functions.
1003 + */
1004 +#ifdef LNUM_COMPLEX
1005 +# include "lnum.h"
1006 +#endif
1007
1008  #undef PI
1009 -#define PI (3.14159265358979323846)
1010 -#define RADIANS_PER_DEGREE (PI/180.0)
1011 -
1012 +#ifdef LNUM_FLOAT
1013 +# define PI (3.14159265358979323846F)
1014 +#elif defined(M_PI)
1015 +# define PI M_PI
1016 +#else
1017 +# define PI (3.14159265358979323846264338327950288)
1018 +#endif
1019 +#define RADIANS_PER_DEGREE (PI/180)
1020
1021 +#undef HUGE
1022 +#ifdef LNUM_FLOAT
1023 +# define HUGE HUGE_VALF
1024 +#elif defined(LNUM_LDOUBLE)
1025 +# define HUGE HUGE_VALL
1026 +#else
1027 +# define HUGE HUGE_VAL
1028 +#endif
1029
1030  static int math_abs (lua_State *L) {
1031 -  lua_pushnumber(L, fabs(luaL_checknumber(L, 1)));
1032 +#ifdef LNUM_COMPLEX
1033 +  lua_pushnumber(L, _LF(cabs) (luaL_checkcomplex(L,1)));
1034 +#else
1035 +  lua_pushnumber(L, _LF(fabs) (luaL_checknumber(L, 1)));
1036 +#endif
1037    return 1;
1038  }
1039
1040  static int math_sin (lua_State *L) {
1041 -  lua_pushnumber(L, sin(luaL_checknumber(L, 1)));
1042 +#ifdef LNUM_COMPLEX
1043 +  lua_pushcomplex(L, _LF(csin) (luaL_checkcomplex(L,1)));
1044 +#else
1045 +  lua_pushnumber(L, _LF(sin) (luaL_checknumber(L, 1)));
1046 +#endif
1047    return 1;
1048  }
1049
1050  static int math_sinh (lua_State *L) {
1051 -  lua_pushnumber(L, sinh(luaL_checknumber(L, 1)));
1052 +#ifdef LNUM_COMPLEX
1053 +  lua_pushcomplex(L, _LF(csinh) (luaL_checkcomplex(L,1)));
1054 +#else
1055 +  lua_pushnumber(L, _LF(sinh) (luaL_checknumber(L, 1)));
1056 +#endif
1057    return 1;
1058  }
1059
1060  static int math_cos (lua_State *L) {
1061 -  lua_pushnumber(L, cos(luaL_checknumber(L, 1)));
1062 +#ifdef LNUM_COMPLEX
1063 +  lua_pushcomplex(L, _LF(ccos) (luaL_checkcomplex(L,1)));
1064 +#else
1065 +  lua_pushnumber(L, _LF(cos) (luaL_checknumber(L, 1)));
1066 +#endif
1067    return 1;
1068  }
1069
1070  static int math_cosh (lua_State *L) {
1071 -  lua_pushnumber(L, cosh(luaL_checknumber(L, 1)));
1072 +#ifdef LNUM_COMPLEX
1073 +  lua_pushcomplex(L, _LF(ccosh) (luaL_checkcomplex(L,1)));
1074 +#else
1075 +  lua_pushnumber(L, _LF(cosh) (luaL_checknumber(L, 1)));
1076 +#endif
1077    return 1;
1078  }
1079
1080  static int math_tan (lua_State *L) {
1081 -  lua_pushnumber(L, tan(luaL_checknumber(L, 1)));
1082 +#ifdef LNUM_COMPLEX
1083 +  lua_pushcomplex(L, _LF(ctan) (luaL_checkcomplex(L,1)));
1084 +#else
1085 +  lua_pushnumber(L, _LF(tan) (luaL_checknumber(L, 1)));
1086 +#endif
1087    return 1;
1088  }
1089
1090  static int math_tanh (lua_State *L) {
1091 -  lua_pushnumber(L, tanh(luaL_checknumber(L, 1)));
1092 +#ifdef LNUM_COMPLEX
1093 +  lua_pushcomplex(L, _LF(ctanh) (luaL_checkcomplex(L,1)));
1094 +#else
1095 +  lua_pushnumber(L, _LF(tanh) (luaL_checknumber(L, 1)));
1096 +#endif
1097    return 1;
1098  }
1099
1100  static int math_asin (lua_State *L) {
1101 -  lua_pushnumber(L, asin(luaL_checknumber(L, 1)));
1102 +#ifdef LNUM_COMPLEX
1103 +  lua_pushcomplex(L, _LF(casin) (luaL_checkcomplex(L,1)));
1104 +#else
1105 +  lua_pushnumber(L, _LF(asin) (luaL_checknumber(L, 1)));
1106 +#endif
1107    return 1;
1108  }
1109
1110  static int math_acos (lua_State *L) {
1111 -  lua_pushnumber(L, acos(luaL_checknumber(L, 1)));
1112 +#ifdef LNUM_COMPLEX
1113 +  lua_pushcomplex(L, _LF(cacos) (luaL_checkcomplex(L,1)));
1114 +#else
1115 +  lua_pushnumber(L, _LF(acos) (luaL_checknumber(L, 1)));
1116 +#endif
1117    return 1;
1118  }
1119
1120  static int math_atan (lua_State *L) {
1121 -  lua_pushnumber(L, atan(luaL_checknumber(L, 1)));
1122 +#ifdef LNUM_COMPLEX
1123 +  lua_pushcomplex(L, _LF(catan) (luaL_checkcomplex(L,1)));
1124 +#else
1125 +  lua_pushnumber(L, _LF(atan) (luaL_checknumber(L, 1)));
1126 +#endif
1127    return 1;
1128  }
1129
1130  static int math_atan2 (lua_State *L) {
1131 -  lua_pushnumber(L, atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
1132 +  /* scalars only */
1133 +  lua_pushnumber(L, _LF(atan2) (luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
1134    return 1;
1135  }
1136
1137  static int math_ceil (lua_State *L) {
1138 -  lua_pushnumber(L, ceil(luaL_checknumber(L, 1)));
1139 +#ifdef LNUM_COMPLEX
1140 +  lua_Complex v= luaL_checkcomplex(L, 1);
1141 +  lua_pushcomplex(L, _LF(ceil) (_LF(creal)(v)) + _LF(ceil) (_LF(cimag)(v))*I);
1142 +#else
1143 +  lua_pushnumber(L, _LF(ceil) (luaL_checknumber(L, 1)));
1144 +#endif
1145    return 1;
1146  }
1147
1148  static int math_floor (lua_State *L) {
1149 -  lua_pushnumber(L, floor(luaL_checknumber(L, 1)));
1150 +#ifdef LNUM_COMPLEX
1151 +  lua_Complex v= luaL_checkcomplex(L, 1);
1152 +  lua_pushcomplex(L, _LF(floor) (_LF(creal)(v)) + _LF(floor) (_LF(cimag)(v))*I);
1153 +#else
1154 +  lua_pushnumber(L, _LF(floor) (luaL_checknumber(L, 1)));
1155 +#endif
1156    return 1;
1157  }
1158
1159 -static int math_fmod (lua_State *L) {
1160 -  lua_pushnumber(L, fmod(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
1161 +static int math_fmod (lua_State *L) {
1162 +  /* scalars only */
1163 +  lua_pushnumber(L, _LF(fmod) (luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
1164    return 1;
1165  }
1166
1167  static int math_modf (lua_State *L) {
1168 -  double ip;
1169 -  double fp = modf(luaL_checknumber(L, 1), &ip);
1170 +  /* scalars only */
1171 +  lua_Number ip;
1172 +  lua_Number fp = _LF(modf) (luaL_checknumber(L, 1), &ip);
1173    lua_pushnumber(L, ip);
1174    lua_pushnumber(L, fp);
1175    return 2;
1176  }
1177
1178  static int math_sqrt (lua_State *L) {
1179 -  lua_pushnumber(L, sqrt(luaL_checknumber(L, 1)));
1180 +#ifdef LNUM_COMPLEX
1181 +  lua_pushcomplex(L, _LF(csqrt) (luaL_checkcomplex(L,1)));
1182 +#else
1183 +  lua_pushnumber(L, _LF(sqrt) (luaL_checknumber(L, 1)));
1184 +#endif
1185    return 1;
1186  }
1187
1188  static int math_pow (lua_State *L) {
1189 -  lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
1190 +#ifdef LNUM_COMPLEX
1191 +  /* C99 'cpow' gives somewhat inaccurate results (i.e. (-1)^2 = -1+1.2246467991474e-16i).
1192 +  * 'luai_vectpow' smoothens such, reusing it is the reason we need to #include "lnum.h".
1193 +  */
1194 +  lua_pushcomplex(L, luai_vectpow(luaL_checkcomplex(L,1), luaL_checkcomplex(L,2)));
1195 +#else
1196 +  lua_pushnumber(L, _LF(pow) (luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
1197 +#endif
1198    return 1;
1199  }
1200
1201  static int math_log (lua_State *L) {
1202 -  lua_pushnumber(L, log(luaL_checknumber(L, 1)));
1203 +#ifdef LNUM_COMPLEX
1204 +  lua_pushcomplex(L, _LF(clog) (luaL_checkcomplex(L,1)));
1205 +#else
1206 +  lua_pushnumber(L, _LF(log) (luaL_checknumber(L, 1)));
1207 +#endif
1208    return 1;
1209  }
1210
1211  static int math_log10 (lua_State *L) {
1212 -  lua_pushnumber(L, log10(luaL_checknumber(L, 1)));
1213 +#ifdef LNUM_COMPLEX
1214 +  /* Not in standard <complex.h> , but easy to calculate: log_a(x) = log_b(x) / log_b(a)
1215 +  */
1216 +  lua_pushcomplex(L, _LF(clog) (luaL_checkcomplex(L,1)) / _LF(log) (10));
1217 +#else
1218 +  lua_pushnumber(L, _LF(log10) (luaL_checknumber(L, 1)));
1219 +#endif
1220    return 1;
1221  }
1222
1223  static int math_exp (lua_State *L) {
1224 -  lua_pushnumber(L, exp(luaL_checknumber(L, 1)));
1225 +#ifdef LNUM_COMPLEX
1226 +  lua_pushcomplex(L, _LF(cexp) (luaL_checkcomplex(L,1)));
1227 +#else
1228 +  lua_pushnumber(L, _LF(exp) (luaL_checknumber(L, 1)));
1229 +#endif
1230    return 1;
1231  }
1232
1233 @@ -138,19 +234,20 @@ static int math_rad (lua_State *L) {
1234
1235  static int math_frexp (lua_State *L) {
1236    int e;
1237 -  lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e));
1238 +  lua_pushnumber(L, _LF(frexp) (luaL_checknumber(L, 1), &e));
1239    lua_pushinteger(L, e);
1240    return 2;
1241  }
1242
1243  static int math_ldexp (lua_State *L) {
1244 -  lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2)));
1245 +  lua_pushnumber(L, _LF(ldexp) (luaL_checknumber(L, 1), luaL_checkint(L, 2)));
1246    return 1;
1247  }
1248
1249
1250
1251  static int math_min (lua_State *L) {
1252 +  /* scalars only */
1253    int n = lua_gettop(L);  /* number of arguments */
1254    lua_Number dmin = luaL_checknumber(L, 1);
1255    int i;
1256 @@ -165,6 +262,7 @@ static int math_min (lua_State *L) {
1257
1258
1259  static int math_max (lua_State *L) {
1260 +  /* scalars only */
1261    int n = lua_gettop(L);  /* number of arguments */
1262    lua_Number dmax = luaL_checknumber(L, 1);
1263    int i;
1264 @@ -182,25 +280,20 @@ static int math_random (lua_State *L) {
1265    /* the `%' avoids the (rare) case of r==1, and is needed also because on
1266       some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */
1267    lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;
1268 -  switch (lua_gettop(L)) {  /* check number of arguments */
1269 -    case 0: {  /* no arguments */
1270 -      lua_pushnumber(L, r);  /* Number between 0 and 1 */
1271 -      break;
1272 -    }
1273 -    case 1: {  /* only upper limit */
1274 -      int u = luaL_checkint(L, 1);
1275 -      luaL_argcheck(L, 1<=u, 1, "interval is empty");
1276 -      lua_pushnumber(L, floor(r*u)+1);  /* int between 1 and `u' */
1277 -      break;
1278 -    }
1279 -    case 2: {  /* lower and upper limits */
1280 -      int l = luaL_checkint(L, 1);
1281 -      int u = luaL_checkint(L, 2);
1282 -      luaL_argcheck(L, l<=u, 2, "interval is empty");
1283 -      lua_pushnumber(L, floor(r*(u-l+1))+l);  /* int between `l' and `u' */
1284 -      break;
1285 -    }
1286 -    default: return luaL_error(L, "wrong number of arguments");
1287 +  int n= lua_gettop(L);  /* number of arguments */
1288 +  if (n==0) {  /* no arguments: range [0,1) */
1289 +    lua_pushnumber(L, r);
1290 +  } else if (n<=2) {   /* int range [1,u] or [l,u] */
1291 +    int l= n==1 ? 1 : luaL_checkint(L, 1);
1292 +    int u = luaL_checkint(L, n);
1293 +    int tmp;
1294 +    lua_Number d;
1295 +    luaL_argcheck(L, l<=u, n, "interval is empty");
1296 +    d= _LF(floor)(r*(u-l+1));
1297 +    lua_number2int(tmp,d);
1298 +    lua_pushinteger(L, l+tmp);
1299 +  } else {
1300 +    return luaL_error(L, "wrong number of arguments");
1301    }
1302    return 1;
1303  }
1304 @@ -211,6 +304,66 @@ static int math_randomseed (lua_State *L
1305    return 0;
1306  }
1307
1308 +/*
1309 +* Lua 5.1 does not have acosh, asinh, atanh for scalars (not ANSI C)
1310 +*/
1311 +#if __STDC_VERSION__ >= 199901L
1312 +static int math_acosh (lua_State *L) {
1313 +# ifdef LNUM_COMPLEX
1314 +  lua_pushcomplex(L, _LF(cacosh) (luaL_checkcomplex(L,1)));
1315 +# else
1316 +  lua_pushnumber(L, _LF(acosh) (luaL_checknumber(L,1)));
1317 +# endif
1318 +  return 1;
1319 +}
1320 +static int math_asinh (lua_State *L) {
1321 +# ifdef LNUM_COMPLEX
1322 +  lua_pushcomplex(L, _LF(casinh) (luaL_checkcomplex(L,1)));
1323 +# else
1324 +  lua_pushnumber(L, _LF(asinh) (luaL_checknumber(L,1)));
1325 +# endif
1326 +  return 1;
1327 +}
1328 +static int math_atanh (lua_State *L) {
1329 +# ifdef LNUM_COMPLEX
1330 +  lua_pushcomplex(L, _LF(catanh) (luaL_checkcomplex(L,1)));
1331 +# else
1332 +  lua_pushnumber(L, _LF(atanh) (luaL_checknumber(L,1)));
1333 +# endif
1334 +  return 1;
1335 +}
1336 +#endif
1337 +
1338 +/*
1339 + * C99 complex functions, not covered above.
1340 +*/
1341 +#ifdef LNUM_COMPLEX
1342 +static int math_arg (lua_State *L) {
1343 +  lua_pushnumber(L, _LF(carg) (luaL_checkcomplex(L,1)));
1344 +  return 1;
1345 +}
1346 +
1347 +static int math_imag (lua_State *L) {
1348 +  lua_pushnumber(L, _LF(cimag) (luaL_checkcomplex(L,1)));
1349 +  return 1;
1350 +}
1351 +
1352 +static int math_real (lua_State *L) {
1353 +  lua_pushnumber(L, _LF(creal) (luaL_checkcomplex(L,1)));
1354 +  return 1;
1355 +}
1356 +
1357 +static int math_conj (lua_State *L) {
1358 +  lua_pushcomplex(L, _LF(conj) (luaL_checkcomplex(L,1)));
1359 +  return 1;
1360 +}
1361 +
1362 +static int math_proj (lua_State *L) {
1363 +  lua_pushcomplex(L, _LF(cproj) (luaL_checkcomplex(L,1)));
1364 +  return 1;
1365 +}
1366 +#endif
1367 +
1368
1369  static const luaL_Reg mathlib[] = {
1370    {"abs",   math_abs},
1371 @@ -241,6 +394,18 @@ static const luaL_Reg mathlib[] = {
1372    {"sqrt",  math_sqrt},
1373    {"tanh",   math_tanh},
1374    {"tan",   math_tan},
1375 +#if __STDC_VERSION__ >= 199901L
1376 +  {"acosh",  math_acosh},
1377 +  {"asinh",  math_asinh},
1378 +  {"atanh",  math_atanh},
1379 +#endif
1380 +#ifdef LNUM_COMPLEX
1381 +  {"arg",   math_arg},
1382 +  {"imag",  math_imag},
1383 +  {"real",  math_real},
1384 +  {"conj",  math_conj},
1385 +  {"proj",  math_proj},
1386 +#endif
1387    {NULL, NULL}
1388  };
1389
1390 @@ -252,8 +417,10 @@ LUALIB_API int luaopen_math (lua_State *
1391    luaL_register(L, LUA_MATHLIBNAME, mathlib);
1392    lua_pushnumber(L, PI);
1393    lua_setfield(L, -2, "pi");
1394 -  lua_pushnumber(L, HUGE_VAL);
1395 +  lua_pushnumber(L, HUGE);
1396    lua_setfield(L, -2, "huge");
1397 +  lua_pushinteger(L, LUA_INTEGER_MAX );
1398 +  lua_setfield(L, -2, "hugeint");
1399  #if defined(LUA_COMPAT_MOD)
1400    lua_getfield(L, -1, "fmod");
1401    lua_setfield(L, -2, "mod");
1402 --- /dev/null
1403 +++ b/src/lnum.c
1404 @@ -0,0 +1,312 @@
1405 +/*
1406 +** $Id: lnum.c,v ... $
1407 +** Internal number model
1408 +** See Copyright Notice in lua.h
1409 +*/
1410 +
1411 +#include <stdlib.h>
1412 +#include <math.h>
1413 +#include <ctype.h>
1414 +#include <string.h>
1415 +#include <stdio.h>
1416 +#include <errno.h>
1417 +
1418 +#define lnum_c
1419 +#define LUA_CORE
1420 +
1421 +#include "lua.h"
1422 +#include "llex.h"
1423 +#include "lnum.h"
1424 +
1425 +/*
1426 +** lua_real2str converts a (non-complex) number to a string.
1427 +** lua_str2real converts a string to a (non-complex) number.
1428 +*/
1429 +#define lua_real2str(s,n)  sprintf((s), LUA_NUMBER_FMT, (n))
1430 +
1431 +/*
1432 +* Note: Only 'strtod()' is part of ANSI C; others are C99 and
1433 +* may need '--std=c99' compiler setting (at least on Ubuntu 7.10).
1434 +*
1435 +* Visual C++ 2008 Express does not have 'strtof()', nor 'strtold()'.
1436 +* References to '_strtold()' exist but don't compile. It seems best
1437 +* to leave Windows users with DOUBLE only (or compile with MinGW).
1438 +*
1439 +* In practise, using '(long double)strtod' is a risky thing, since
1440 +* it will cause accuracy loss in reading in numbers, and such losses
1441 +* will pile up in later processing. Get a real 'strtold()' or don't
1442 +* use that mode at all.
1443 +*/
1444 +#ifdef LNUM_DOUBLE
1445 +# define lua_str2real  strtod
1446 +#elif defined(LNUM_FLOAT)
1447 +# define lua_str2real  strtof
1448 +#elif defined(LNUM_LDOUBLE)
1449 +# define lua_str2real  strtold
1450 +#endif
1451 +
1452 +#define lua_integer2str(s,v) sprintf((s), LUA_INTEGER_FMT, (v))
1453 +
1454 +/* 's' is expected to be LUAI_MAXNUMBER2STR long (enough for any number)
1455 +*/
1456 +void luaO_num2buf( char *s, const TValue *o )
1457 +{
1458 +  lua_Number n;
1459 +  lua_assert( ttisnumber(o) );
1460 +
1461 +  /* Reason to handle integers differently is not only speed, but accuracy as
1462 +   * well. We want to make any integer tostring() without roundings, at all.
1463 +   */
1464 +  if (ttisint(o)) {
1465 +    lua_integer2str( s, ivalue(o) );
1466 +    return;
1467 +  }
1468 +  n= nvalue_fast(o);
1469 +  lua_real2str(s, n);
1470 +
1471 +#ifdef LNUM_COMPLEX
1472 +  lua_Number n2= nvalue_img_fast(o);
1473 +  if (n2!=0) {   /* Postfix with +-Ni */
1474 +      int re0= (n == 0);
1475 +      char *s2= re0 ? s : strchr(s,'\0');
1476 +      if ((!re0) && (n2>0)) *s2++= '+';
1477 +      lua_real2str( s2, n2 );
1478 +      strcat(s2,"i");
1479 +  }
1480 +#endif
1481 +}
1482 +
1483 +/*
1484 +* If a LUA_TNUMBER has integer value, give it.
1485 +*/
1486 +int /*bool*/ tt_integer_valued( const TValue *o, lua_Integer *ref ) {
1487 +  lua_Number d;
1488 +  lua_Integer i;
1489 +
1490 +  lua_assert( ttype(o)==LUA_TNUMBER );
1491 +  lua_assert( ref );
1492 +#ifdef LNUM_COMPLEX
1493 +  if (nvalue_img_fast(o)!=0) return 0;
1494 +#endif
1495 +  d= nvalue_fast(o);
1496 +  lua_number2integer(i, d);
1497 +  if (cast_num(i) == d) {
1498 +    *ref= i; return 1;
1499 +  }
1500 +  return 0;
1501 +}
1502 +
1503 +/*
1504 + * Lua 5.1.3 (using 'strtod()') allows 0x+hex but not 0+octal. This is good,
1505 + * and we should NOT use 'autobase' 0 with 'strtoul[l]()' for this reason.
1506 + *
1507 + * Lua 5.1.3 allows '0x...' numbers to overflow and lose precision; this is not
1508 + * good. On Visual C++ 2008, 'strtod()' does not even take them in. Better to
1509 + * require hex values to fit 'lua_Integer' or give an error that they don't?
1510 + *
1511 + * Full hex range (0 .. 0xff..ff) is stored as integers, not to lose any bits.
1512 + * Numerical value of 0xff..ff will be -1, if used in calculations.
1513 + *
1514 + * Returns: TK_INT for a valid integer, '*endptr_ref' updated
1515 + *          TK_NUMBER for seemingly numeric, to be parsed as floating point
1516 + *          0 for bad characters, not a number (or '0x' out of range)
1517 + */
1518 +static int luaO_str2i (const char *s, lua_Integer *res, char **endptr_ref) {
1519 +  char *endptr;
1520 +  /* 'v' gets ULONG_MAX on possible overflow (which is > LUA_INTEGER_MAX);
1521 +   * we don't have to check 'errno' here.
1522 +   */
1523 +  unsigned LUA_INTEGER v= lua_str2ul(s, &endptr, 10);
1524 +  if (endptr == s) return 0;  /* nothing numeric */
1525 +  if (v==0 && *endptr=='x') {
1526 +    errno= 0;   /* needs to be set, 'strtoul[l]' does not clear it */
1527 +    v= lua_str2ul(endptr+1, &endptr, 16);  /* retry as hex, unsigned range */
1528 +    if (errno==ERANGE) {   /* clamped to 0xff..ff */
1529 +#if (defined(LNUM_INT32) && !defined(LNUM_FLOAT)) || defined(LNUM_LDOUBLE)
1530 +      return TK_NUMBER; /* Allow to be read as floating point (has more integer range) */
1531 +#else
1532 +      return 0;  /* Reject the number */
1533 +#endif
1534 +    }
1535 +  } else if ((v > LUA_INTEGER_MAX) || (*endptr && (!isspace(*endptr)))) {
1536 +    return TK_NUMBER;  /* not in signed range, or has '.', 'e' etc. trailing */
1537 +  }
1538 +  *res= (lua_Integer)v;
1539 +  *endptr_ref= endptr;
1540 +  return TK_INT;
1541 +}
1542 +
1543 +/* 0 / TK_NUMBER / TK_INT (/ TK_NUMBER2) */
1544 +int luaO_str2d (const char *s, lua_Number *res_n, lua_Integer *res_i) {
1545 +  char *endptr;
1546 +  int ret= TK_NUMBER;
1547 +  /* Check integers first, if caller is allowing.
1548 +   * If 'res2'==NULL, they're only looking for floating point.
1549 +   */
1550 +  if (res_i) {
1551 +    ret= luaO_str2i(s,res_i,&endptr);
1552 +    if (ret==0) return 0;
1553 +  }
1554 +  if (ret==TK_NUMBER) {
1555 +    lua_assert(res_n);
1556 +    /* Note: Visual C++ 2008 Express 'strtod()' does not read in "0x..."
1557 +     *       numbers; it will read '0' and spit 'x' as endptr.
1558 +     *       This means hex constants not fitting in 'lua_Integer' won't
1559 +     *       be read in at all. What to do?
1560 +     */
1561 +    *res_n = lua_str2real(s, &endptr);
1562 +    if (endptr == s) return 0;  /* conversion failed */
1563 +    /* Visual C++ 2008 'strtod()' does not allow "0x..." input. */
1564 +#if defined(_MSC_VER) && !defined(LNUM_FLOAT) && !defined(LNUM_INT64)
1565 +    if (*res_n==0 && *endptr=='x') {
1566 +      /* Hex constant too big for 'lua_Integer' but that could fit in 'lua_Number'
1567 +       * integer bits
1568 +       */
1569 +      unsigned __int64 v= _strtoui64( s, &endptr, 16 );
1570 +      /* We just let > 64 bit values be clamped to _UI64_MAX (MSDN does not say 'errno'==ERANGE would be set) */
1571 +      *res_n= cast_num(v);
1572 +      if (*res_n != v) return 0;    /* Would have lost accuracy */
1573 +    }
1574 +#endif
1575 +#ifdef LNUM_COMPLEX
1576 +    if (*endptr == 'i') { endptr++; ret= TK_NUMBER2; }
1577 +#endif
1578 +  }
1579 +  if (*endptr) {
1580 +    while (isspace(cast(unsigned char, *endptr))) endptr++;
1581 +    if (*endptr) return 0;  /* invalid trail */
1582 +  }
1583 +  return ret;
1584 +}
1585 +
1586 +
1587 +/* Functions for finding out, when integer operations remain in range
1588 + * (and doing them).
1589 + */
1590 +int try_addint( lua_Integer *r, lua_Integer ib, lua_Integer ic ) {
1591 +  lua_Integer v= ib+ic; /* may overflow */
1592 +  if (ib>0 && ic>0)      { if (v < 0) return 0; /*overflow, use floats*/ }
1593 +  else if (ib<0 && ic<0) { if (v >= 0) return 0; }
1594 +  *r= v;
1595 +  return 1;
1596 +}
1597 +
1598 +int try_subint( lua_Integer *r, lua_Integer ib, lua_Integer ic ) {
1599 +  lua_Integer v= ib-ic; /* may overflow */
1600 +  if (ib>=0 && ic<0)     { if (v < 0) return 0; /*overflow, use floats*/ }
1601 +  else if (ib<0 && ic>0) { if (v >= 0) return 0; }
1602 +  *r= v;
1603 +  return 1;
1604 +}
1605 +
1606 +int try_mulint( lua_Integer *r, lua_Integer ib, lua_Integer ic ) {
1607 +  if (ib!=LUA_INTEGER_MIN && ic!=LUA_INTEGER_MIN) {
1608 +    lua_Integer b= luai_abs(ib), c= luai_abs(ic);
1609 +    if ( (ib==0) || (LUA_INTEGER_MAX/b >= c) ) {
1610 +      *r= ib*ic;  /* no overflow */
1611 +      return 1;
1612 +    }
1613 +  } else if (ib==0 || ic==0) {
1614 +    *r= 0; return 1;
1615 +  }
1616 +
1617 +  /* Result can be LUA_INTEGER_MIN; if it is, calculating it using floating
1618 +   * point will not cause accuracy loss.
1619 +   */
1620 +  if ( luai_nummul( cast_num(ib), cast_num(ic) ) == LUA_INTEGER_MIN ) {
1621 +    *r= LUA_INTEGER_MIN;
1622 +    return 1;
1623 +  }
1624 +  return 0;
1625 +}
1626 +
1627 +int try_divint( lua_Integer *r, lua_Integer ib, lua_Integer ic ) {
1628 +  /* N/0: leave to float side, to give an error
1629 +  */
1630 +  if (ic==0) return 0;
1631 +
1632 +  /* N/LUA_INTEGER_MIN: always non-integer results, or 0 or +1
1633 +  */
1634 +  if (ic==LUA_INTEGER_MIN) {
1635 +    if (ib==LUA_INTEGER_MIN) { *r=1; return 1; }
1636 +    if (ib==0) { *r=0; return 1; }
1637 +
1638 +  /* LUA_INTEGER_MIN (-2^31|63)/N: calculate using float side (either the division
1639 +   *    causes non-integer results, or there is no accuracy loss in int->fp->int
1640 +   *    conversions (N=2,4,8,..,256 and N=2^30,2^29,..2^23).
1641 +   */
1642 +  } else if (ib==LUA_INTEGER_MIN) {
1643 +    lua_Number d= luai_numdiv( cast_num(LUA_INTEGER_MIN), cast_num(ic) );
1644 +    lua_Integer i; lua_number2integer(i,d);
1645 +    if (cast_num(i)==d) { *r= i; return 1; }
1646 +
1647 +  } else {
1648 +    /* Note: We _can_ use ANSI C mod here, even on negative values, since
1649 +     *       we only test for == 0 (the sign would be implementation dependent).
1650 +     */
1651 +     if (ib%ic == 0) { *r= ib/ic; return 1; }
1652 +  }
1653 +
1654 +  return 0;
1655 +}
1656 +
1657 +int try_modint( lua_Integer *r, lua_Integer ib, lua_Integer ic ) {
1658 +  if (ic!=0) {
1659 +    /* ANSI C can be trusted when b%c==0, or when values are non-negative.
1660 +     * b - (floor(b/c) * c)
1661 +     *   -->
1662 +     * + +: b - (b/c) * c (b % c can be used)
1663 +     * - -: b - (b/c) * c (b % c could work, but not defined by ANSI C)
1664 +     * 0 -: b - (b/c) * c (=0, b % c could work, but not defined by ANSI C)
1665 +     * - +: b - (b/c-1) * c (when b!=-c)
1666 +     * + -: b - (b/c-1) * c (when b!=-c)
1667 +     *
1668 +     * o MIN%MIN ends up 0, via overflow in calcs but that does not matter.
1669 +     * o MIN%MAX ends up MAX-1 (and other such numbers), also after overflow,
1670 +     *   but that does not matter, results do.
1671 +     */
1672 +    lua_Integer v= ib % ic;
1673 +    if ( v!=0 && (ib<0 || ic<0) ) {
1674 +      v= ib - ((ib/ic) - ((ib<=0 && ic<0) ? 0:1)) * ic;
1675 +    }
1676 +    /* Result should always have same sign as 2nd argument. (PIL2) */
1677 +    lua_assert( (v<0) ? (ic<0) : (v>0) ? (ic>0) : 1 );
1678 +    *r= v;
1679 +    return 1;
1680 +  }
1681 +  return 0;  /* let float side return NaN */
1682 +}
1683 +
1684 +int try_powint( lua_Integer *r, lua_Integer ib, lua_Integer ic ) {
1685 +
1686 +    /* In FLOAT/INT32 or FLOAT|DOUBLE/INT64 modes, calculating integer powers
1687 +     * via FP realm may lose accuracy (i.e. 7^11 = 1977326743, which fits int32
1688 +     * but not 23-bit float mantissa).
1689 +     *
1690 +     * The current solution is dumb, but it works and uses little code. Use of
1691 +     * integer powers is not anticipated to be very frequent (apart from 2^x,
1692 +     * which is separately optimized).
1693 +     */
1694 +  if (ib==0) *r=0;
1695 +  else if (ic<0) return 0;  /* FP realm */
1696 +  else if (ib==2 && ic < (int)sizeof(lua_Integer)*8-1) *r= ((lua_Integer)1)<<ic;   /* 1,2,4,...2^30 | 2^62 optimization */
1697 +  else if (ic==0) *r=1;
1698 +  else if (luai_abs(ib)==1) *r= (ic%2) ? ib:1;
1699 +  else {
1700 +    lua_Integer x= ib;
1701 +    while( --ic ) {
1702 +      if (!try_mulint( &x, x, ib ))
1703 +        return 0; /* FP realm */
1704 +    }
1705 +    *r= x;
1706 +  }
1707 +  return 1;
1708 +}
1709 +
1710 +int try_unmint( lua_Integer *r, lua_Integer ib ) {
1711 +  /* Negating LUA_INTEGER_MIN leaves the range. */
1712 +  if ( ib != LUA_INTEGER_MIN )
1713 +    { *r= -ib; return 1; }
1714 +  return 0;
1715 +}
1716 +
1717 --- /dev/null
1718 +++ b/src/lnum.h
1719 @@ -0,0 +1,116 @@
1720 +/*
1721 +** $Id: lnum.h,v ... $
1722 +** Internal Number model
1723 +** See Copyright Notice in lua.h
1724 +*/
1725 +
1726 +#ifndef lnum_h
1727 +#define lnum_h
1728 +
1729 +#include <math.h>
1730 +
1731 +#include "lobject.h"
1732 +
1733 +/*
1734 +** The luai_num* macros define the primitive operations over 'lua_Number's
1735 +** (not 'lua_Integer's, not 'lua_Complex').
1736 +*/
1737 +#define luai_numadd(a,b)       ((a)+(b))
1738 +#define luai_numsub(a,b)       ((a)-(b))
1739 +#define luai_nummul(a,b)       ((a)*(b))
1740 +#define luai_numdiv(a,b)       ((a)/(b))
1741 +#define luai_nummod(a,b)       ((a) - _LF(floor)((a)/(b))*(b))
1742 +#define luai_numpow(a,b)       (_LF(pow)(a,b))
1743 +#define luai_numunm(a)         (-(a))
1744 +#define luai_numeq(a,b)            ((a)==(b))
1745 +#define luai_numlt(a,b)            ((a)<(b))
1746 +#define luai_numle(a,b)            ((a)<=(b))
1747 +#define luai_numisnan(a)       (!luai_numeq((a), (a)))
1748 +
1749 +int try_addint( lua_Integer *r, lua_Integer ib, lua_Integer ic );
1750 +int try_subint( lua_Integer *r, lua_Integer ib, lua_Integer ic );
1751 +int try_mulint( lua_Integer *r, lua_Integer ib, lua_Integer ic );
1752 +int try_divint( lua_Integer *r, lua_Integer ib, lua_Integer ic );
1753 +int try_modint( lua_Integer *r, lua_Integer ib, lua_Integer ic );
1754 +int try_powint( lua_Integer *r, lua_Integer ib, lua_Integer ic );
1755 +int try_unmint( lua_Integer *r, lua_Integer ib );
1756 +
1757 +#ifdef LNUM_COMPLEX
1758 +  static inline lua_Complex luai_vectunm( lua_Complex a ) { return -a; }
1759 +  static inline lua_Complex luai_vectadd( lua_Complex a, lua_Complex b ) { return a+b; }
1760 +  static inline lua_Complex luai_vectsub( lua_Complex a, lua_Complex b ) { return a-b; }
1761 +  static inline lua_Complex luai_vectmul( lua_Complex a, lua_Complex b ) { return a*b; }
1762 +  static inline lua_Complex luai_vectdiv( lua_Complex a, lua_Complex b ) { return a/b; }
1763 +
1764 +/*
1765 + * C99 does not provide modulus for complex numbers. It most likely is not
1766 + * meaningful at all.
1767 + */
1768 +
1769 +/*
1770 + * Complex power
1771 + *
1772 + * C99 'cpow' gives inaccurate results for many common cases s.a. (1i)^2 ->
1773 + * -1+1.2246467991474e-16i (OS X 10.4, gcc 4.0.1 build 5367)
1774 + *
1775 + * [(a+bi)^(c+di)] = (r^c) * exp(-d*t) * cos(c*t + d*ln(r)) +
1776 + *                 = (r^c) * exp(-d*t) * sin(c*t + d*ln(r)) *i
1777 + * r = sqrt(a^2+b^2), t = arctan( b/a )
1778 + *
1779 + * Reference: <http://home.att.net/~srschmitt/complexnumbers.html>
1780 + * Could also be calculated using: x^y = exp(ln(x)*y)
1781 + *
1782 + * Note: Defined here (and not in .c) so 'lmathlib.c' can share the
1783 + *       implementation.
1784 + */
1785 +  static inline
1786 +  lua_Complex luai_vectpow( lua_Complex a, lua_Complex b )
1787 +  {
1788 +# if 1
1789 +    lua_Number ar= _LF(creal)(a), ai= _LF(cimag)(a);
1790 +    lua_Number br= _LF(creal)(b), bi= _LF(cimag)(b);
1791 +
1792 +    if (ai==0 && bi==0) {     /* a^c (real) */
1793 +        return luai_numpow( ar, br );
1794 +    }
1795 +
1796 +    int br_int= (int)br;
1797 +
1798 +    if ( ai!=0 && bi==0 && br_int==br && br_int!=0 && br_int!=INT_MIN ) {
1799 +        /* (a+bi)^N, N = { +-1,+-2, ... +-INT_MAX }
1800 +        */
1801 +        lua_Number k= luai_numpow( _LF(sqrt) (ar*ar + ai*ai), br );
1802 +        lua_Number cos_z, sin_z;
1803 +
1804 +        /* Situation depends upon c (N) in the following manner:
1805 +         *
1806 +         * N%4==0                                => cos(c*t)=1, sin(c*t)=0
1807 +         * (N*sign(b))%4==1 or (N*sign(b))%4==-3 => cos(c*t)=0, sin(c*t)=1
1808 +         * N%4==2 or N%4==-2                     => cos(c*t)=-1, sin(c*t)=0
1809 +         * (N*sign(b))%4==-1 or (N*sign(b))%4==3 => cos(c*t)=0, sin(c*t)=-1
1810 +         */
1811 +      int br_int_abs = br_int<0 ? -br_int:br_int;
1812 +
1813 +      switch( (br_int_abs%4) * (br_int<0 ? -1:1) * (ai<0 ? -1:1) ) {
1814 +        case 0:             cos_z=1, sin_z=0; break;
1815 +        case 2: case -2:    cos_z=-1, sin_z=0; break;
1816 +        case 1: case -3:    cos_z=0, sin_z=1; break;
1817 +        case 3: case -1:    cos_z=0, sin_z=-1; break;
1818 +        default:            lua_assert(0); return 0;
1819 +      }
1820 +      return k*cos_z + (k*sin_z)*I;
1821 +    }
1822 +# endif
1823 +    return _LF(cpow) ( a, b );
1824 +  }
1825 +#endif
1826 +
1827 +LUAI_FUNC int luaO_str2d (const char *s, lua_Number *res1, lua_Integer *res2);
1828 +LUAI_FUNC void luaO_num2buf( char *s, const TValue *o );
1829 +
1830 +LUAI_FUNC int /*bool*/ tt_integer_valued( const TValue *o, lua_Integer *ref );
1831 +
1832 +#define luai_normalize(o) \
1833 +{ lua_Integer _i; if (tt_integer_valued(o,&_i)) setivalue(o,_i); }
1834 +
1835 +#endif
1836 --- /dev/null
1837 +++ b/src/lnum_config.h
1838 @@ -0,0 +1,221 @@
1839 +/*
1840 +** $Id: lnum_config.h,v ... $
1841 +** Internal Number model
1842 +** See Copyright Notice in lua.h
1843 +*/
1844 +
1845 +#ifndef lnum_config_h
1846 +#define lnum_config_h
1847 +
1848 +/*
1849 +** Default number modes
1850 +*/
1851 +#if (!defined LNUM_DOUBLE) && (!defined LNUM_FLOAT) && (!defined LNUM_LDOUBLE)
1852 +# define LNUM_FLOAT
1853 +#endif
1854 +#if (!defined LNUM_INT16) && (!defined LNUM_INT32) && (!defined LNUM_INT64)
1855 +# define LNUM_INT32
1856 +#endif
1857 +
1858 +/*
1859 +** Require C99 mode for COMPLEX, FLOAT and LDOUBLE (only DOUBLE is ANSI C).
1860 +*/
1861 +#if defined(LNUM_COMPLEX) && (__STDC_VERSION__ < 199901L)
1862 +# error "Need C99 for complex (use '--std=c99' or similar)"
1863 +#elif defined(LNUM_LDOUBLE) && (__STDC_VERSION__ < 199901L) && !defined(_MSC_VER)
1864 +# error "Need C99 for 'long double' (use '--std=c99' or similar)"
1865 +#elif defined(LNUM_FLOAT) && (__STDC_VERSION__ < 199901L)
1866 +/* LNUM_FLOAT not supported on Windows */
1867 +# error "Need C99 for 'float' (use '--std=c99' or similar)"
1868 +#endif
1869 +
1870 +/*
1871 +** Number mode identifier to accompany the version string.
1872 +*/
1873 +#ifdef LNUM_COMPLEX
1874 +# define _LNUM1 "complex "
1875 +#else
1876 +# define _LNUM1 ""
1877 +#endif
1878 +#ifdef LNUM_DOUBLE
1879 +# define _LNUM2 "double"
1880 +#elif defined(LNUM_FLOAT)
1881 +# define _LNUM2 "float"
1882 +#elif defined(LNUM_LDOUBLE)
1883 +# define _LNUM2 "ldouble"
1884 +#endif
1885 +#ifdef LNUM_INT32
1886 +# define _LNUM3 "int32"
1887 +#elif defined(LNUM_INT64)
1888 +# define _LNUM3 "int64"
1889 +#elif defined(LNUM_INT16)
1890 +# define _LNUM3 "int16"
1891 +#endif
1892 +#define LUA_LNUM _LNUM1 _LNUM2 " " _LNUM3
1893 +
1894 +/*
1895 +** LUA_NUMBER is the type of floating point number in Lua
1896 +** LUA_NUMBER_SCAN is the format for reading numbers.
1897 +** LUA_NUMBER_FMT is the format for writing numbers.
1898 +*/
1899 +#ifdef LNUM_FLOAT
1900 +# define LUA_NUMBER         float
1901 +# define LUA_NUMBER_SCAN    "%f"
1902 +# define LUA_NUMBER_FMT     "%g"
1903 +#elif (defined LNUM_DOUBLE)
1904 +# define LUA_NUMBER            double
1905 +# define LUA_NUMBER_SCAN    "%lf"
1906 +# define LUA_NUMBER_FMT     "%.14g"
1907 +#elif (defined LNUM_LDOUBLE)
1908 +# define LUA_NUMBER         long double
1909 +# define LUA_NUMBER_SCAN    "%Lg"
1910 +# define LUA_NUMBER_FMT     "%.20Lg"
1911 +#endif
1912 +
1913 +
1914 +/*
1915 +** LUAI_MAXNUMBER2STR: size of a buffer fitting any number->string result.
1916 +**
1917 +**  double:  24 (sign, x.xxxxxxxxxxxxxxe+nnnn, and \0)
1918 +**  int64:   21 (19 digits, sign, and \0)
1919 +**  long double: 43 for 128-bit (sign, x.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxe+nnnn, and \0)
1920 +**           30 for 80-bit (sign, x.xxxxxxxxxxxxxxxxxxxxe+nnnn, and \0)
1921 +*/
1922 +#ifdef LNUM_LDOUBLE
1923 +# define _LUAI_MN2S 44
1924 +#else
1925 +# define _LUAI_MN2S 24
1926 +#endif
1927 +
1928 +#ifdef LNUM_COMPLEX
1929 +# define LUAI_MAXNUMBER2STR (2*_LUAI_MN2S)
1930 +#else
1931 +# define LUAI_MAXNUMBER2STR _LUAI_MN2S
1932 +#endif
1933 +
1934 +/*
1935 +** LUA_INTEGER is the integer type used by lua_pushinteger/lua_tointeger/lua_isinteger.
1936 +** LUA_INTEGER_SCAN is the format for reading integers
1937 +** LUA_INTEGER_FMT is the format for writing integers
1938 +**
1939 +** Note: Visual C++ 2005 does not have 'strtoull()', use '_strtoui64()' instead.
1940 +*/
1941 +#ifdef LNUM_INT32
1942 +# if LUAI_BITSINT > 16
1943 +#  define LUA_INTEGER   int
1944 +#  define LUA_INTEGER_SCAN "%d"
1945 +#  define LUA_INTEGER_FMT "%d"
1946 +# else
1947 +/* Note: 'LUA_INTEGER' being 'ptrdiff_t' (as in Lua 5.1) causes problems with
1948 + *       'printf()' operations. Also 'unsigned ptrdiff_t' is invalid.
1949 + */
1950 +#  define LUA_INTEGER   long
1951 +#  define LUA_INTEGER_SCAN "%ld"
1952 +#  define LUA_INTEGER_FMT "%ld"
1953 +# endif
1954 +# define LUA_INTEGER_MAX 0x7FFFFFFF             /* 2^31-1 */
1955 +/* */
1956 +#elif defined(LNUM_INT64)
1957 +# define LUA_INTEGER   long long
1958 +# ifdef _MSC_VER
1959 +#  define lua_str2ul    _strtoui64
1960 +# else
1961 +#  define lua_str2ul    strtoull
1962 +# endif
1963 +# define LUA_INTEGER_SCAN "%lld"
1964 +# define LUA_INTEGER_FMT "%lld"
1965 +# define LUA_INTEGER_MAX 0x7fffffffffffffffLL       /* 2^63-1 */
1966 +# define LUA_INTEGER_MIN (-LUA_INTEGER_MAX - 1LL)   /* -2^63 */
1967 +/* */
1968 +#elif defined(LNUM_INT16)
1969 +# if LUAI_BITSINT > 16
1970 +#  define LUA_INTEGER    short
1971 +#  define LUA_INTEGER_SCAN "%hd"
1972 +#  define LUA_INTEGER_FMT "%hd"
1973 +# else
1974 +#  define LUA_INTEGER    int
1975 +#  define LUA_INTEGER_SCAN "%d"
1976 +#  define LUA_INTEGER_FMT "%d"
1977 +# endif
1978 +# define LUA_INTEGER_MAX 0x7FFF             /* 2^16-1 */
1979 +#endif
1980 +
1981 +#ifndef lua_str2ul
1982 +# define lua_str2ul (unsigned LUA_INTEGER)strtoul
1983 +#endif
1984 +#ifndef LUA_INTEGER_MIN
1985 +# define LUA_INTEGER_MIN (-LUA_INTEGER_MAX -1)  /* -2^16|32 */
1986 +#endif
1987 +
1988 +/*
1989 +@@ lua_number2int is a macro to convert lua_Number to int.
1990 +@@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
1991 +** CHANGE them if you know a faster way to convert a lua_Number to
1992 +** int (with any rounding method and without throwing errors) in your
1993 +** system. In Pentium machines, a naive typecast from double to int
1994 +** in C is extremely slow, so any alternative is worth trying.
1995 +*/
1996 +
1997 +/* On a Pentium, resort to a trick */
1998 +#if defined(LNUM_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
1999 +    (defined(__i386) || defined (_M_IX86) || defined(__i386__))
2000 +
2001 +/* On a Microsoft compiler, use assembler */
2002 +# if defined(_MSC_VER)
2003 +#  define lua_number2int(i,d)   __asm fld d   __asm fistp i
2004 +# else
2005 +
2006 +/* the next trick should work on any Pentium, but sometimes clashes
2007 +   with a DirectX idiosyncrasy */
2008 +union luai_Cast { double l_d; long l_l; };
2009 +#  define lua_number2int(i,d) \
2010 +  { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
2011 +# endif
2012 +
2013 +# ifndef LNUM_INT64
2014 +#  define lua_number2integer    lua_number2int
2015 +# endif
2016 +
2017 +/* this option always works, but may be slow */
2018 +#else
2019 +# define lua_number2int(i,d)        ((i)=(int)(d))
2020 +#endif
2021 +
2022 +/* Note: Some compilers (OS X gcc 4.0?) may choke on double->long long conversion
2023 + *       since it can lose precision. Others do require 'long long' there.
2024 + */
2025 +#ifndef lua_number2integer
2026 +# define lua_number2integer(i,d)    ((i)=(lua_Integer)(d))
2027 +#endif
2028 +
2029 +/*
2030 +** 'luai_abs()' to give absolute value of 'lua_Integer'
2031 +*/
2032 +#ifdef LNUM_INT32
2033 +# define luai_abs abs
2034 +#elif defined(LNUM_INT64) && (__STDC_VERSION__ >= 199901L)
2035 +# define luai_abs llabs
2036 +#else
2037 +# define luai_abs(v) ((v) >= 0 ? (v) : -(v))
2038 +#endif
2039 +
2040 +/*
2041 +** LUAI_UACNUMBER is the result of an 'usual argument conversion' over a number.
2042 +** LUAI_UACINTEGER the same, over an integer.
2043 +*/
2044 +#define LUAI_UACNUMBER double
2045 +#define LUAI_UACINTEGER long
2046 +
2047 +/* ANSI C only has math funcs for 'double. C99 required for float and long double
2048 + * variants.
2049 + */
2050 +#ifdef LNUM_DOUBLE
2051 +# define _LF(name) name
2052 +#elif defined(LNUM_FLOAT)
2053 +# define _LF(name) name ## f
2054 +#elif defined(LNUM_LDOUBLE)
2055 +# define _LF(name) name ## l
2056 +#endif
2057 +
2058 +#endif
2059 +
2060 --- a/src/lobject.c
2061 +++ b/src/lobject.c
2062 @@ -21,7 +21,8 @@
2063  #include "lstate.h"
2064  #include "lstring.h"
2065  #include "lvm.h"
2066 -
2067 +#include "llex.h"
2068 +#include "lnum.h"
2069
2070
2071  const TValue luaO_nilobject_ = {{NULL}, LUA_TNIL};
2072 @@ -70,12 +71,31 @@ int luaO_log2 (unsigned int x) {
2073
2074
2075  int luaO_rawequalObj (const TValue *t1, const TValue *t2) {
2076 -  if (ttype(t1) != ttype(t2)) return 0;
2077 +  if (!ttype_ext_same(t1,t2)) return 0;
2078    else switch (ttype(t1)) {
2079      case LUA_TNIL:
2080        return 1;
2081 +    case LUA_TINT:
2082 +      if (ttype(t2)==LUA_TINT)
2083 +        return ivalue(t1) == ivalue(t2);
2084 +      else {  /* t1:int, t2:num */
2085 +#ifdef LNUM_COMPLEX
2086 +        if (nvalue_img_fast(t2) != 0) return 0;
2087 +#endif
2088 +        /* Avoid doing accuracy losing cast, if possible. */
2089 +        lua_Integer tmp;
2090 +        if (tt_integer_valued(t2,&tmp))
2091 +          return ivalue(t1) == tmp;
2092 +        else
2093 +          return luai_numeq( cast_num(ivalue(t1)), nvalue_fast(t2) );
2094 +        }
2095      case LUA_TNUMBER:
2096 -      return luai_numeq(nvalue(t1), nvalue(t2));
2097 +        if (ttype(t2)==LUA_TINT)
2098 +          return luaO_rawequalObj(t2, t1);  /* swap LUA_TINT to left */
2099 +#ifdef LNUM_COMPLEX
2100 +        if (!luai_numeq(nvalue_img_fast(t1), nvalue_img_fast(t2))) return 0;
2101 +#endif
2102 +        return luai_numeq(nvalue_fast(t1), nvalue_fast(t2));
2103      case LUA_TBOOLEAN:
2104        return bvalue(t1) == bvalue(t2);  /* boolean true must be 1 !! */
2105      case LUA_TLIGHTUSERDATA:
2106 @@ -86,21 +106,6 @@ int luaO_rawequalObj (const TValue *t1,
2107    }
2108  }
2109
2110 -
2111 -int luaO_str2d (const char *s, lua_Number *result) {
2112 -  char *endptr;
2113 -  *result = lua_str2number(s, &endptr);
2114 -  if (endptr == s) return 0;  /* conversion failed */
2115 -  if (*endptr == 'x' || *endptr == 'X')  /* maybe an hexadecimal constant? */
2116 -    *result = cast_num(strtoul(s, &endptr, 16));
2117 -  if (*endptr == '\0') return 1;  /* most common case */
2118 -  while (isspace(cast(unsigned char, *endptr))) endptr++;
2119 -  if (*endptr != '\0') return 0;  /* invalid trailing characters? */
2120 -  return 1;
2121 -}
2122 -
2123 -
2124 -
2125  static void pushstr (lua_State *L, const char *str) {
2126    setsvalue2s(L, L->top, luaS_new(L, str));
2127    incr_top(L);
2128 @@ -131,7 +136,11 @@ const char *luaO_pushvfstring (lua_State
2129          break;
2130        }
2131        case 'd': {
2132 -        setnvalue(L->top, cast_num(va_arg(argp, int)));
2133 +        /* This is tricky for 64-bit integers; maybe they even cannot be
2134 +         * supported on all compilers; depends on the conversions applied to
2135 +         * variable argument lists. TBD: test!
2136 +         */
2137 +        setivalue(L->top, (lua_Integer) va_arg(argp, l_uacInteger));
2138          incr_top(L);
2139          break;
2140        }
2141 @@ -212,3 +221,4 @@ void luaO_chunkid (char *out, const char
2142      }
2143    }
2144  }
2145 +
2146 --- a/src/lobject.h
2147 +++ b/src/lobject.h
2148 @@ -17,7 +17,11 @@
2149
2150
2151  /* tags for values visible from Lua */
2152 -#define LAST_TAG       LUA_TTHREAD
2153 +#if LUA_TINT > LUA_TTHREAD
2154 +# define LAST_TAG   LUA_TINT
2155 +#else
2156 +# define LAST_TAG      LUA_TTHREAD
2157 +#endif
2158
2159  #define NUM_TAGS       (LAST_TAG+1)
2160
2161 @@ -59,7 +63,12 @@ typedef struct GCheader {
2162  typedef union {
2163    GCObject *gc;
2164    void *p;
2165 +#ifdef LNUM_COMPLEX
2166 +  lua_Complex n;
2167 +#else
2168    lua_Number n;
2169 +#endif
2170 +  lua_Integer i;
2171    int b;
2172  } Value;
2173
2174 @@ -77,7 +86,11 @@ typedef struct lua_TValue {
2175
2176  /* Macros to test type */
2177  #define ttisnil(o)     (ttype(o) == LUA_TNIL)
2178 -#define ttisnumber(o)  (ttype(o) == LUA_TNUMBER)
2179 +#define ttisint(o) (ttype(o) == LUA_TINT)
2180 +#define ttisnumber(o) ((ttype(o) == LUA_TINT) || (ttype(o) == LUA_TNUMBER))
2181 +#ifdef LNUM_COMPLEX
2182 +# define ttiscomplex(o) ((ttype(o) == LUA_TNUMBER) && (nvalue_img_fast(o)!=0))
2183 +#endif
2184  #define ttisstring(o)  (ttype(o) == LUA_TSTRING)
2185  #define ttistable(o)   (ttype(o) == LUA_TTABLE)
2186  #define ttisfunction(o)        (ttype(o) == LUA_TFUNCTION)
2187 @@ -90,7 +103,25 @@ typedef struct lua_TValue {
2188  #define ttype(o)       ((o)->tt)
2189  #define gcvalue(o)     check_exp(iscollectable(o), (o)->value.gc)
2190  #define pvalue(o)      check_exp(ttislightuserdata(o), (o)->value.p)
2191 -#define nvalue(o)      check_exp(ttisnumber(o), (o)->value.n)
2192 +
2193 +#define ttype_ext(o) ( ttype(o) == LUA_TINT ? LUA_TNUMBER : ttype(o) )
2194 +#define ttype_ext_same(o1,o2) ( (ttype(o1)==ttype(o2)) || (ttisnumber(o1) && ttisnumber(o2)) )
2195 +
2196 +/* '_fast' variants are for cases where 'ttype(o)' is known to be LUA_TNUMBER.
2197 + */
2198 +#ifdef LNUM_COMPLEX
2199 +#  define nvalue_complex_fast(o) check_exp( ttype(o)==LUA_TNUMBER, (o)->value.n )
2200 +#  define nvalue_fast(o)     ( _LF(creal) ( nvalue_complex_fast(o) ) )
2201 +#  define nvalue_img_fast(o) ( _LF(cimag) ( nvalue_complex_fast(o) ) )
2202 +#  define nvalue_complex(o) check_exp( ttisnumber(o), (ttype(o)==LUA_TINT) ? (o)->value.i : (o)->value.n )
2203 +#  define nvalue_img(o) check_exp( ttisnumber(o), (ttype(o)==LUA_TINT) ? 0 : _LF(cimag)( (o)->value.n ) )
2204 +#  define nvalue(o) check_exp( ttisnumber(o), (ttype(o)==LUA_TINT) ? cast_num((o)->value.i) : _LF(creal)((o)->value.n) )
2205 +#else
2206 +# define nvalue(o)     check_exp( ttisnumber(o), (ttype(o)==LUA_TINT) ? cast_num((o)->value.i) : (o)->value.n )
2207 +# define nvalue_fast(o) check_exp( ttype(o)==LUA_TNUMBER, (o)->value.n )
2208 +#endif
2209 +#define ivalue(o)      check_exp( ttype(o)==LUA_TINT, (o)->value.i )
2210 +
2211  #define rawtsvalue(o)  check_exp(ttisstring(o), &(o)->value.gc->ts)
2212  #define tsvalue(o)     (&rawtsvalue(o)->tsv)
2213  #define rawuvalue(o)   check_exp(ttisuserdata(o), &(o)->value.gc->u)
2214 @@ -116,8 +147,27 @@ typedef struct lua_TValue {
2215  /* Macros to set values */
2216  #define setnilvalue(obj) ((obj)->tt=LUA_TNIL)
2217
2218 -#define setnvalue(obj,x) \
2219 -  { TValue *i_o=(obj); i_o->value.n=(x); i_o->tt=LUA_TNUMBER; }
2220 +/* Must not have side effects, 'x' may be expression.
2221 +*/
2222 +#define setivalue(obj,x) \
2223 +    { TValue *i_o=(obj); i_o->value.i=(x); i_o->tt=LUA_TINT; }
2224 +
2225 +# define setnvalue(obj,x) \
2226 +    { TValue *i_o=(obj); i_o->value.n= (x); i_o->tt=LUA_TNUMBER; }
2227 +
2228 +/* Note: Complex always has "inline", both are C99.
2229 +*/
2230 +#ifdef LNUM_COMPLEX
2231 +  static inline void setnvalue_complex_fast( TValue *obj, lua_Complex x ) {
2232 +    lua_assert( _LF(cimag)(x) != 0 );
2233 +    obj->value.n= x; obj->tt= LUA_TNUMBER;
2234 +  }
2235 +  static inline void setnvalue_complex( TValue *obj, lua_Complex x ) {
2236 +    if (_LF(cimag)(x) == 0) { setnvalue(obj, _LF(creal)(x)); }
2237 +    else { obj->value.n= x; obj->tt= LUA_TNUMBER; }
2238 +  }
2239 +#endif
2240 +
2241
2242  #define setpvalue(obj,x) \
2243    { TValue *i_o=(obj); i_o->value.p=(x); i_o->tt=LUA_TLIGHTUSERDATA; }
2244 @@ -155,9 +205,6 @@ typedef struct lua_TValue {
2245      i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TPROTO; \
2246      checkliveness(G(L),i_o); }
2247
2248 -
2249 -
2250 -
2251  #define setobj(L,obj1,obj2) \
2252    { const TValue *o2=(obj2); TValue *o1=(obj1); \
2253      o1->value = o2->value; o1->tt=o2->tt; \
2254 @@ -185,8 +232,11 @@ typedef struct lua_TValue {
2255
2256  #define setttype(obj, tt) (ttype(obj) = (tt))
2257
2258 -
2259 -#define iscollectable(o)       (ttype(o) >= LUA_TSTRING)
2260 +#if LUA_TINT >= LUA_TSTRING
2261 +# define iscollectable(o)      ((ttype(o) >= LUA_TSTRING) && (ttype(o) != LUA_TINT))
2262 +#else
2263 +# define iscollectable(o)      (ttype(o) >= LUA_TSTRING)
2264 +#endif
2265
2266
2267
2268 @@ -370,12 +420,10 @@ LUAI_FUNC int luaO_log2 (unsigned int x)
2269  LUAI_FUNC int luaO_int2fb (unsigned int x);
2270  LUAI_FUNC int luaO_fb2int (int x);
2271  LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2);
2272 -LUAI_FUNC int luaO_str2d (const char *s, lua_Number *result);
2273  LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
2274                                                         va_list argp);
2275  LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);
2276  LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t len);
2277
2278 -
2279  #endif
2280
2281 --- a/src/loslib.c
2282 +++ b/src/loslib.c
2283 @@ -186,15 +186,30 @@ static int os_time (lua_State *L) {
2284    }
2285    if (t == (time_t)(-1))
2286      lua_pushnil(L);
2287 -  else
2288 -    lua_pushnumber(L, (lua_Number)t);
2289 +  else {
2290 +     /* On float systems the pushed value must be an integer, NOT a number.
2291 +      * Otherwise, accuracy is lost in the time_t->float conversion.
2292 +      */
2293 +#ifdef LNUM_FLOAT
2294 +     lua_pushinteger(L, (lua_Integer) t);
2295 +#else
2296 +     lua_pushnumber(L, (lua_Number) t);
2297 +#endif
2298 +     }
2299    return 1;
2300  }
2301
2302
2303  static int os_difftime (lua_State *L) {
2304 +#ifdef LNUM_FLOAT
2305 +  lua_Integer i= (lua_Integer)
2306 +    difftime( (time_t)(luaL_checkinteger(L, 1)),
2307 +              (time_t)(luaL_optinteger(L, 2, 0)));
2308 +  lua_pushinteger(L, i);
2309 +#else
2310    lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
2311                               (time_t)(luaL_optnumber(L, 2, 0))));
2312 +#endif
2313    return 1;
2314  }
2315
2316 --- a/src/lparser.c
2317 +++ b/src/lparser.c
2318 @@ -33,7 +33,6 @@
2319
2320  #define luaY_checklimit(fs,v,l,m)      if ((v)>(l)) errorlimit(fs,l,m)
2321
2322 -
2323  /*
2324  ** nodes for block list (list of active blocks)
2325  */
2326 @@ -72,7 +71,7 @@ static void errorlimit (FuncState *fs, i
2327    const char *msg = (fs->f->linedefined == 0) ?
2328      luaO_pushfstring(fs->L, "main function has more than %d %s", limit, what) :
2329      luaO_pushfstring(fs->L, "function at line %d has more than %d %s",
2330 -                            fs->f->linedefined, limit, what);
2331 +                            (fs->f->linedefined), limit, what);
2332    luaX_lexerror(fs->ls, msg, 0);
2333  }
2334
2335 @@ -733,6 +732,18 @@ static void simpleexp (LexState *ls, exp
2336        v->u.nval = ls->t.seminfo.r;
2337        break;
2338      }
2339 +    case TK_INT: {
2340 +      init_exp(v, VKINT, 0);
2341 +      v->u.ival = ls->t.seminfo.i;
2342 +      break;
2343 +    }
2344 +#ifdef LNUM_COMPLEX
2345 +    case TK_NUMBER2: {
2346 +      init_exp(v, VKNUM2, 0);
2347 +      v->u.nval = ls->t.seminfo.r;
2348 +      break;
2349 +    }
2350 +#endif
2351      case TK_STRING: {
2352        codestring(ls, v, ls->t.seminfo.ts);
2353        break;
2354 @@ -1079,7 +1090,7 @@ static void fornum (LexState *ls, TStrin
2355    if (testnext(ls, ','))
2356      exp1(ls);  /* optional step */
2357    else {  /* default step = 1 */
2358 -    luaK_codeABx(fs, OP_LOADK, fs->freereg, luaK_numberK(fs, 1));
2359 +    luaK_codeABx(fs, OP_LOADK, fs->freereg, luaK_integerK(fs, 1));
2360      luaK_reserveregs(fs, 1);
2361    }
2362    forbody(ls, base, line, 1, 1);
2363 --- a/src/lparser.h
2364 +++ b/src/lparser.h
2365 @@ -31,7 +31,11 @@ typedef enum {
2366    VRELOCABLE,  /* info = instruction pc */
2367    VNONRELOC,   /* info = result register */
2368    VCALL,       /* info = instruction pc */
2369 -  VVARARG      /* info = instruction pc */
2370 +  VVARARG,     /* info = instruction pc */
2371 +  VKINT     /* ival = integer value */
2372 +#ifdef LNUM_COMPLEX
2373 +  ,VKNUM2   /* nval = imaginary value */
2374 +#endif
2375  } expkind;
2376
2377  typedef struct expdesc {
2378 @@ -39,6 +43,7 @@ typedef struct expdesc {
2379    union {
2380      struct { int info, aux; } s;
2381      lua_Number nval;
2382 +    lua_Integer ival;
2383    } u;
2384    int t;  /* patch list of `exit when true' */
2385    int f;  /* patch list of `exit when false' */
2386 --- a/src/lstrlib.c
2387 +++ b/src/lstrlib.c
2388 @@ -43,8 +43,8 @@ static ptrdiff_t posrelat (ptrdiff_t pos
2389  static int str_sub (lua_State *L) {
2390    size_t l;
2391    const char *s = luaL_checklstring(L, 1, &l);
2392 -  ptrdiff_t start = posrelat(luaL_checkinteger(L, 2), l);
2393 -  ptrdiff_t end = posrelat(luaL_optinteger(L, 3, -1), l);
2394 +  ptrdiff_t start = posrelat(luaL_checkint32(L, 2), l);
2395 +  ptrdiff_t end = posrelat(luaL_optint32(L, 3, -1), l);
2396    if (start < 1) start = 1;
2397    if (end > (ptrdiff_t)l) end = (ptrdiff_t)l;
2398    if (start <= end)
2399 @@ -106,8 +106,8 @@ static int str_rep (lua_State *L) {
2400  static int str_byte (lua_State *L) {
2401    size_t l;
2402    const char *s = luaL_checklstring(L, 1, &l);
2403 -  ptrdiff_t posi = posrelat(luaL_optinteger(L, 2, 1), l);
2404 -  ptrdiff_t pose = posrelat(luaL_optinteger(L, 3, posi), l);
2405 +  ptrdiff_t posi = posrelat(luaL_optint32(L, 2, 1), l);
2406 +  ptrdiff_t pose = posrelat(luaL_optint32(L, 3, posi), l);
2407    int n, i;
2408    if (posi <= 0) posi = 1;
2409    if ((size_t)pose > l) pose = l;
2410 @@ -496,7 +496,7 @@ static int str_find_aux (lua_State *L, i
2411    size_t l1, l2;
2412    const char *s = luaL_checklstring(L, 1, &l1);
2413    const char *p = luaL_checklstring(L, 2, &l2);
2414 -  ptrdiff_t init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1;
2415 +  ptrdiff_t init = posrelat(luaL_optint32(L, 3, 1), l1) - 1;
2416    if (init < 0) init = 0;
2417    else if ((size_t)(init) > l1) init = (ptrdiff_t)l1;
2418    if (find && (lua_toboolean(L, 4) ||  /* explicit request? */
2419 @@ -690,7 +690,7 @@ static int str_gsub (lua_State *L) {
2420  ** maximum size of each format specification (such as '%-099.99d')
2421  ** (+10 accounts for %99.99x plus margin of error)
2422  */
2423 -#define MAX_FORMAT     (sizeof(FLAGS) + sizeof(LUA_INTFRMLEN) + 10)
2424 +#define MAX_FORMAT     (sizeof(FLAGS) + sizeof(LUA_INTEGER_FMT)-2 + 10)
2425
2426
2427  static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
2428 @@ -747,9 +747,9 @@ static const char *scanformat (lua_State
2429  static void addintlen (char *form) {
2430    size_t l = strlen(form);
2431    char spec = form[l - 1];
2432 -  strcpy(form + l - 1, LUA_INTFRMLEN);
2433 -  form[l + sizeof(LUA_INTFRMLEN) - 2] = spec;
2434 -  form[l + sizeof(LUA_INTFRMLEN) - 1] = '\0';
2435 +  const char *tmp= LUA_INTEGER_FMT;   /* "%lld" or "%ld" */
2436 +  strcpy(form + l - 1, tmp+1);
2437 +  form[l + sizeof(LUA_INTEGER_FMT)-4] = spec;
2438  }
2439
2440
2441 @@ -779,12 +779,12 @@ static int str_format (lua_State *L) {
2442          }
2443          case 'd':  case 'i': {
2444            addintlen(form);
2445 -          sprintf(buff, form, (LUA_INTFRM_T)luaL_checknumber(L, arg));
2446 +          sprintf(buff, form, luaL_checkinteger(L, arg));
2447            break;
2448          }
2449          case 'o':  case 'u':  case 'x':  case 'X': {
2450            addintlen(form);
2451 -          sprintf(buff, form, (unsigned LUA_INTFRM_T)luaL_checknumber(L, arg));
2452 +          sprintf(buff, form, (unsigned LUA_INTEGER)luaL_checkinteger(L, arg));
2453            break;
2454          }
2455          case 'e':  case 'E': case 'f':
2456 --- a/src/ltable.c
2457 +++ b/src/ltable.c
2458 @@ -33,6 +33,7 @@
2459  #include "lobject.h"
2460  #include "lstate.h"
2461  #include "ltable.h"
2462 +#include "lnum.h"
2463
2464
2465  /*
2466 @@ -51,25 +52,15 @@
2467
2468  #define hashstr(t,str)  hashpow2(t, (str)->tsv.hash)
2469  #define hashboolean(t,p)        hashpow2(t, p)
2470 -
2471 +#define hashint(t,i)    hashpow2(t,i)
2472
2473  /*
2474  ** for some types, it is better to avoid modulus by power of 2, as
2475  ** they tend to have many 2 factors.
2476  */
2477  #define hashmod(t,n)   (gnode(t, ((n) % ((sizenode(t)-1)|1))))
2478 -
2479 -
2480  #define hashpointer(t,p)       hashmod(t, IntPoint(p))
2481
2482 -
2483 -/*
2484 -** number of ints inside a lua_Number
2485 -*/
2486 -#define numints                cast_int(sizeof(lua_Number)/sizeof(int))
2487 -
2488 -
2489 -
2490  #define dummynode              (&dummynode_)
2491
2492  static const Node dummynode_ = {
2493 @@ -80,27 +71,46 @@ static const Node dummynode_ = {
2494
2495  /*
2496  ** hash for lua_Numbers
2497 +**
2498 +** for non-complex modes, never called with 'lua_Integer' value range (s.a. 0)
2499  */
2500  static Node *hashnum (const Table *t, lua_Number n) {
2501 -  unsigned int a[numints];
2502 -  int i;
2503 -  if (luai_numeq(n, 0))  /* avoid problems with -0 */
2504 -    return gnode(t, 0);
2505 -  memcpy(a, &n, sizeof(a));
2506 -  for (i = 1; i < numints; i++) a[0] += a[i];
2507 -  return hashmod(t, a[0]);
2508 +  const unsigned int *p= cast(const unsigned int *,&n);
2509 +  unsigned int sum= *p;
2510 +  unsigned int m= sizeof(lua_Number)/sizeof(int);
2511 +  unsigned int i;
2512 +  /* OS X Intel has 'm'==4 and gives "Bus error" if the last integer of
2513 +   * 'n' is read; the actual size of long double is only 80 bits = 10 bytes.
2514 +   * Linux x86 has 'm'==3, and does not require reduction.
2515 +   */
2516 +#if defined(LNUM_LDOUBLE) && defined(__i386__)
2517 +  if (m>3) m--;
2518 +#endif
2519 +  for (i = 1; i < m; i++) sum += p[i];
2520 +  return hashmod(t, sum);
2521  }
2522
2523
2524 -
2525  /*
2526  ** returns the `main' position of an element in a table (that is, the index
2527  ** of its hash value)
2528 +**
2529 +** Floating point numbers with integer value give the hash position of the
2530 +** integer (so they use the same table position).
2531  */
2532  static Node *mainposition (const Table *t, const TValue *key) {
2533 +  lua_Integer i;
2534    switch (ttype(key)) {
2535      case LUA_TNUMBER:
2536 -      return hashnum(t, nvalue(key));
2537 +      if (tt_integer_valued(key,&i))
2538 +        return hashint(t, i);
2539 +#ifdef LNUM_COMPLEX
2540 +      if (nvalue_img_fast(key)!=0 && luai_numeq(nvalue_fast(key),0))
2541 +        return gnode(t, 0);  /* 0 and -0 to give same hash */
2542 +#endif
2543 +      return hashnum(t, nvalue_fast(key));
2544 +    case LUA_TINT:
2545 +      return hashint(t, ivalue(key));
2546      case LUA_TSTRING:
2547        return hashstr(t, rawtsvalue(key));
2548      case LUA_TBOOLEAN:
2549 @@ -116,16 +126,20 @@ static Node *mainposition (const Table *
2550  /*
2551  ** returns the index for `key' if `key' is an appropriate key to live in
2552  ** the array part of the table, -1 otherwise.
2553 +**
2554 +** Anything <=0 is taken as not being in the array part.
2555  */
2556 -static int arrayindex (const TValue *key) {
2557 -  if (ttisnumber(key)) {
2558 -    lua_Number n = nvalue(key);
2559 -    int k;
2560 -    lua_number2int(k, n);
2561 -    if (luai_numeq(cast_num(k), n))
2562 -      return k;
2563 +static int arrayindex (const TValue *key, int max) {
2564 +  lua_Integer k;
2565 +  switch( ttype(key) ) {
2566 +    case LUA_TINT:
2567 +      k= ivalue(key); break;
2568 +    case LUA_TNUMBER:
2569 +      if (tt_integer_valued(key,&k)) break;
2570 +    default:
2571 +      return -1;  /* not to be used as array index */
2572    }
2573 -  return -1;  /* `key' did not match some condition */
2574 +  return ((k>0) && (k <= max)) ? cast_int(k) : -1;
2575  }
2576
2577
2578 @@ -137,8 +151,8 @@ static int arrayindex (const TValue *key
2579  static int findindex (lua_State *L, Table *t, StkId key) {
2580    int i;
2581    if (ttisnil(key)) return -1;  /* first iteration */
2582 -  i = arrayindex(key);
2583 -  if (0 < i && i <= t->sizearray)  /* is `key' inside array part? */
2584 +  i = arrayindex(key, t->sizearray);
2585 +  if (i>0)  /* inside array part? */
2586      return i-1;  /* yes; that's the index (corrected to C) */
2587    else {
2588      Node *n = mainposition(t, key);
2589 @@ -163,7 +177,7 @@ int luaH_next (lua_State *L, Table *t, S
2590    int i = findindex(L, t, key);  /* find original element */
2591    for (i++; i < t->sizearray; i++) {  /* try first array part */
2592      if (!ttisnil(&t->array[i])) {  /* a non-nil value? */
2593 -      setnvalue(key, cast_num(i+1));
2594 +      setivalue(key, i+1);
2595        setobj2s(L, key+1, &t->array[i]);
2596        return 1;
2597      }
2598 @@ -209,8 +223,8 @@ static int computesizes (int nums[], int
2599
2600
2601  static int countint (const TValue *key, int *nums) {
2602 -  int k = arrayindex(key);
2603 -  if (0 < k && k <= MAXASIZE) {  /* is `key' an appropriate array index? */
2604 +  int k = arrayindex(key,MAXASIZE);
2605 +  if (k>0) {  /* appropriate array index? */
2606      nums[ceillog2(k)]++;  /* count as such */
2607      return 1;
2608    }
2609 @@ -308,7 +322,7 @@ static void resize (lua_State *L, Table
2610      /* re-insert elements from vanishing slice */
2611      for (i=nasize; i<oldasize; i++) {
2612        if (!ttisnil(&t->array[i]))
2613 -        setobjt2t(L, luaH_setnum(L, t, i+1), &t->array[i]);
2614 +        setobjt2t(L, luaH_setint(L, t, i+1), &t->array[i]);
2615      }
2616      /* shrink array */
2617      luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
2618 @@ -409,7 +423,9 @@ static TValue *newkey (lua_State *L, Tab
2619      othern = mainposition(t, key2tval(mp));
2620      if (othern != mp) {  /* is colliding node out of its main position? */
2621        /* yes; move colliding node into free position */
2622 -      while (gnext(othern) != mp) othern = gnext(othern);  /* find previous */
2623 +      while (gnext(othern) != mp) {
2624 +        othern = gnext(othern);  /* find previous */
2625 +      }
2626        gnext(othern) = n;  /* redo the chain with `n' in place of `mp' */
2627        *n = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
2628        gnext(mp) = NULL;  /* now `mp' is free */
2629 @@ -432,17 +448,18 @@ static TValue *newkey (lua_State *L, Tab
2630  /*
2631  ** search function for integers
2632  */
2633 -const TValue *luaH_getnum (Table *t, int key) {
2634 +const TValue *luaH_getint (Table *t, lua_Integer key) {
2635    /* (1 <= key && key <= t->sizearray) */
2636    if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray))
2637      return &t->array[key-1];
2638    else {
2639 -    lua_Number nk = cast_num(key);
2640 -    Node *n = hashnum(t, nk);
2641 +    Node *n = hashint(t, key);
2642      do {  /* check whether `key' is somewhere in the chain */
2643 -      if (ttisnumber(gkey(n)) && luai_numeq(nvalue(gkey(n)), nk))
2644 +      if (ttisint(gkey(n)) && (ivalue(gkey(n)) == key)) {
2645          return gval(n);  /* that's it */
2646 -      else n = gnext(n);
2647 +      } else {
2648 +      n = gnext(n);
2649 +    }
2650      } while (n);
2651      return luaO_nilobject;
2652    }
2653 @@ -470,14 +487,12 @@ const TValue *luaH_get (Table *t, const
2654    switch (ttype(key)) {
2655      case LUA_TNIL: return luaO_nilobject;
2656      case LUA_TSTRING: return luaH_getstr(t, rawtsvalue(key));
2657 +    case LUA_TINT: return luaH_getint(t, ivalue(key));
2658      case LUA_TNUMBER: {
2659 -      int k;
2660 -      lua_Number n = nvalue(key);
2661 -      lua_number2int(k, n);
2662 -      if (luai_numeq(cast_num(k), nvalue(key))) /* index is int? */
2663 -        return luaH_getnum(t, k);  /* use specialized version */
2664 -      /* else go through */
2665 -    }
2666 +      lua_Integer i;
2667 +      if (tt_integer_valued(key,&i))
2668 +        return luaH_getint(t,i);
2669 +    } /* pass through */
2670      default: {
2671        Node *n = mainposition(t, key);
2672        do {  /* check whether `key' is somewhere in the chain */
2673 @@ -498,20 +513,25 @@ TValue *luaH_set (lua_State *L, Table *t
2674      return cast(TValue *, p);
2675    else {
2676      if (ttisnil(key)) luaG_runerror(L, "table index is nil");
2677 -    else if (ttisnumber(key) && luai_numisnan(nvalue(key)))
2678 -      luaG_runerror(L, "table index is NaN");
2679 +    else if (ttype(key)==LUA_TNUMBER) {
2680 +      lua_Integer k;
2681 +      if (luai_numisnan(nvalue_fast(key)))
2682 +        luaG_runerror(L, "table index is NaN");
2683 +      if (tt_integer_valued(key,&k))
2684 +        return luaH_setint(L, t, k);
2685 +    }
2686      return newkey(L, t, key);
2687    }
2688  }
2689
2690
2691 -TValue *luaH_setnum (lua_State *L, Table *t, int key) {
2692 -  const TValue *p = luaH_getnum(t, key);
2693 +TValue *luaH_setint (lua_State *L, Table *t, lua_Integer key) {
2694 +  const TValue *p = luaH_getint(t, key);
2695    if (p != luaO_nilobject)
2696      return cast(TValue *, p);
2697    else {
2698      TValue k;
2699 -    setnvalue(&k, cast_num(key));
2700 +    setivalue(&k, key);
2701      return newkey(L, t, &k);
2702    }
2703  }
2704 @@ -533,20 +553,21 @@ static int unbound_search (Table *t, uns
2705    unsigned int i = j;  /* i is zero or a present index */
2706    j++;
2707    /* find `i' and `j' such that i is present and j is not */
2708 -  while (!ttisnil(luaH_getnum(t, j))) {
2709 +  while (!ttisnil(luaH_getint(t, j))) {
2710      i = j;
2711      j *= 2;
2712      if (j > cast(unsigned int, MAX_INT)) {  /* overflow? */
2713        /* table was built with bad purposes: resort to linear search */
2714 -      i = 1;
2715 -      while (!ttisnil(luaH_getnum(t, i))) i++;
2716 -      return i - 1;
2717 +      for( i = 1; i<MAX_INT+1; i++ ) {
2718 +        if (ttisnil(luaH_getint(t, i))) break;
2719 +      }
2720 +      return i - 1;  /* up to MAX_INT */
2721      }
2722    }
2723    /* now do a binary search between them */
2724    while (j - i > 1) {
2725      unsigned int m = (i+j)/2;
2726 -    if (ttisnil(luaH_getnum(t, m))) j = m;
2727 +    if (ttisnil(luaH_getint(t, m))) j = m;
2728      else i = m;
2729    }
2730    return i;
2731 --- a/src/ltable.h
2732 +++ b/src/ltable.h
2733 @@ -18,8 +18,8 @@
2734  #define key2tval(n)    (&(n)->i_key.tvk)
2735
2736
2737 -LUAI_FUNC const TValue *luaH_getnum (Table *t, int key);
2738 -LUAI_FUNC TValue *luaH_setnum (lua_State *L, Table *t, int key);
2739 +LUAI_FUNC const TValue *luaH_getint (Table *t, lua_Integer key);
2740 +LUAI_FUNC TValue *luaH_setint (lua_State *L, Table *t, lua_Integer key);
2741  LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
2742  LUAI_FUNC TValue *luaH_setstr (lua_State *L, Table *t, TString *key);
2743  LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
2744 --- a/src/ltm.c
2745 +++ b/src/ltm.c
2746 @@ -19,7 +19,6 @@
2747  #include "ltm.h"
2748
2749
2750 -
2751  const char *const luaT_typenames[] = {
2752    "nil", "boolean", "userdata", "number",
2753    "string", "table", "function", "userdata", "thread",
2754 @@ -67,6 +66,9 @@ const TValue *luaT_gettmbyobj (lua_State
2755      case LUA_TUSERDATA:
2756        mt = uvalue(o)->metatable;
2757        break;
2758 +    case LUA_TINT:
2759 +      mt = G(L)->mt[LUA_TNUMBER];
2760 +      break;
2761      default:
2762        mt = G(L)->mt[ttype(o)];
2763    }
2764 --- a/src/lua.c
2765 +++ b/src/lua.c
2766 @@ -16,7 +16,7 @@
2767
2768  #include "lauxlib.h"
2769  #include "lualib.h"
2770 -
2771 +#include "llimits.h"
2772
2773
2774  static lua_State *globalL = NULL;
2775 @@ -382,6 +382,15 @@ int main (int argc, char **argv) {
2776      l_message(argv[0], "cannot create state: not enough memory");
2777      return EXIT_FAILURE;
2778    }
2779 +  /* Checking 'sizeof(lua_Integer)' cannot be made in preprocessor on all compilers.
2780 +  */
2781 +#ifdef LNUM_INT16
2782 +  lua_assert( sizeof(lua_Integer) == 2 );
2783 +#elif defined(LNUM_INT32)
2784 +  lua_assert( sizeof(lua_Integer) == 4 );
2785 +#elif defined(LNUM_INT64)
2786 +  lua_assert( sizeof(lua_Integer) == 8 );
2787 +#endif
2788    s.argc = argc;
2789    s.argv = argv;
2790    status = lua_cpcall(L, &pmain, &s);
2791 --- a/src/lua.h
2792 +++ b/src/lua.h
2793 @@ -19,7 +19,7 @@
2794  #define LUA_VERSION    "Lua 5.1"
2795  #define LUA_RELEASE    "Lua 5.1.5"
2796  #define LUA_VERSION_NUM        501
2797 -#define LUA_COPYRIGHT  "Copyright (C) 1994-2012 Lua.org, PUC-Rio"
2798 +#define LUA_COPYRIGHT  "Copyright (C) 1994-2012 Lua.org, PUC-Rio" " (" LUA_LNUM ")"
2799  #define LUA_AUTHORS    "R. Ierusalimschy, L. H. de Figueiredo & W. Celes"
2800
2801
2802 @@ -71,6 +71,16 @@ typedef void * (*lua_Alloc) (void *ud, v
2803  */
2804  #define LUA_TNONE              (-1)
2805
2806 +/* LUA_TINT is an internal type, not visible to applications. There are three
2807 + * potential values where it can be tweaked to (code autoadjusts to these):
2808 + *
2809 + * -2: not 'usual' type value; good since 'LUA_TINT' is not part of the API
2810 + * LUA_TNUMBER+1: shifts other type values upwards, breaking binary compatibility
2811 + *     not acceptable for 5.1, maybe 5.2 onwards?
2812 + *  9: greater than existing (5.1) type values.
2813 +*/
2814 +#define LUA_TINT (-2)
2815 +
2816  #define LUA_TNIL               0
2817  #define LUA_TBOOLEAN           1
2818  #define LUA_TLIGHTUSERDATA     2
2819 @@ -139,6 +149,8 @@ LUA_API int             (lua_isuserdata)
2820  LUA_API int             (lua_type) (lua_State *L, int idx);
2821  LUA_API const char     *(lua_typename) (lua_State *L, int tp);
2822
2823 +LUA_API int             (lua_isinteger) (lua_State *L, int idx);
2824 +
2825  LUA_API int            (lua_equal) (lua_State *L, int idx1, int idx2);
2826  LUA_API int            (lua_rawequal) (lua_State *L, int idx1, int idx2);
2827  LUA_API int            (lua_lessthan) (lua_State *L, int idx1, int idx2);
2828 @@ -244,6 +256,19 @@ LUA_API lua_Alloc (lua_getallocf) (lua_S
2829  LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud);
2830
2831
2832 +/*
2833 +* It is unnecessary to break Lua C API 'lua_tonumber()' compatibility, just
2834 +* because the Lua number type is complex. Most C modules would use scalars
2835 +* only. We'll introduce new 'lua_tocomplex' and 'lua_pushcomplex' for when
2836 +* the module really wants to use them.
2837 +*/
2838 +#ifdef LNUM_COMPLEX
2839 +  #include <complex.h>
2840 +  typedef LUA_NUMBER complex lua_Complex;
2841 +  LUA_API lua_Complex (lua_tocomplex) (lua_State *L, int idx);
2842 +  LUA_API void (lua_pushcomplex) (lua_State *L, lua_Complex v);
2843 +#endif
2844 +
2845
2846  /*
2847  ** ===============================================================
2848 @@ -268,7 +293,12 @@ LUA_API void lua_setallocf (lua_State *L
2849  #define lua_isboolean(L,n)     (lua_type(L, (n)) == LUA_TBOOLEAN)
2850  #define lua_isthread(L,n)      (lua_type(L, (n)) == LUA_TTHREAD)
2851  #define lua_isnone(L,n)                (lua_type(L, (n)) == LUA_TNONE)
2852 -#define lua_isnoneornil(L, n)  (lua_type(L, (n)) <= 0)
2853 +
2854 +#if LUA_TINT < 0
2855 +# define lua_isnoneornil(L, n) ( (lua_type(L,(n)) <= 0) && (lua_type(L,(n)) != LUA_TINT) )
2856 +#else
2857 +# define lua_isnoneornil(L, n) (lua_type(L, (n)) <= 0)
2858 +#endif
2859
2860  #define lua_pushliteral(L, s)  \
2861         lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)
2862 @@ -386,3 +416,4 @@ struct lua_Debug {
2863
2864
2865  #endif
2866 +
2867 --- a/src/luaconf.h
2868 +++ b/src/luaconf.h
2869 @@ -10,7 +10,9 @@
2870
2871  #include <limits.h>
2872  #include <stddef.h>
2873 -
2874 +#ifdef lua_assert
2875 +# include <assert.h>
2876 +#endif
2877
2878  /*
2879  ** ==================================================================
2880 @@ -136,14 +138,38 @@
2881
2882
2883  /*
2884 -@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
2885 -** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
2886 -** machines, ptrdiff_t gives a good choice between int or long.)
2887 +@@ LUAI_BITSINT defines the number of bits in an int.
2888 +** CHANGE here if Lua cannot automatically detect the number of bits of
2889 +** your machine. Probably you do not need to change this.
2890  */
2891 -#define LUA_INTEGER    ptrdiff_t
2892 +/* avoid overflows in comparison */
2893 +#if INT_MAX-20 < 32760
2894 +#define LUAI_BITSINT   16
2895 +#elif INT_MAX > 2147483640L
2896 +/* int has at least 32 bits */
2897 +#define LUAI_BITSINT   32
2898 +#else
2899 +#error "you must define LUA_BITSINT with number of bits in an integer"
2900 +#endif
2901
2902
2903  /*
2904 +@@ LNUM_DOUBLE | LNUM_FLOAT | LNUM_LDOUBLE: Generic Lua number mode
2905 +@@ LNUM_INT32 | LNUM_INT64: Integer type
2906 +@@ LNUM_COMPLEX: Define for using 'a+bi' numbers
2907 +@@
2908 +@@ You can combine LNUM_xxx but only one of each group. I.e. '-DLNUM_FLOAT
2909 +@@ -DLNUM_INT32 -DLNUM_COMPLEX' gives float range complex numbers, with
2910 +@@ 32-bit scalar integer range optimized.
2911 +**
2912 +** These are kept in a separate configuration file mainly for ease of patching
2913 +** (can be changed if integerated to Lua proper).
2914 +*/
2915 +/*#define LNUM_DOUBLE*/
2916 +/*#define LNUM_INT32*/
2917 +#include "lnum_config.h"
2918 +
2919 +/*
2920  @@ LUA_API is a mark for all core API functions.
2921  @@ LUALIB_API is a mark for all standard library functions.
2922  ** CHANGE them if you need to define those functions in some special way.
2923 @@ -383,22 +409,6 @@
2924
2925
2926  /*
2927 -@@ LUAI_BITSINT defines the number of bits in an int.
2928 -** CHANGE here if Lua cannot automatically detect the number of bits of
2929 -** your machine. Probably you do not need to change this.
2930 -*/
2931 -/* avoid overflows in comparison */
2932 -#if INT_MAX-20 < 32760
2933 -#define LUAI_BITSINT   16
2934 -#elif INT_MAX > 2147483640L
2935 -/* int has at least 32 bits */
2936 -#define LUAI_BITSINT   32
2937 -#else
2938 -#error "you must define LUA_BITSINT with number of bits in an integer"
2939 -#endif
2940 -
2941 -
2942 -/*
2943  @@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
2944  @@ LUAI_INT32 is an signed integer with at least 32 bits.
2945  @@ LUAI_UMEM is an unsigned integer big enough to count the total
2946 @@ -425,6 +435,15 @@
2947  #define LUAI_MEM       long
2948  #endif
2949
2950 +/*
2951 +@@ LUAI_BOOL carries 0 and nonzero (normally 1). It may be defined as 'char'
2952 +** (to save memory), 'int' (for speed), 'bool' (for C++) or '_Bool' (C99)
2953 +*/
2954 +#ifdef __cplusplus
2955 +# define LUAI_BOOL bool
2956 +#else
2957 +# define LUAI_BOOL int
2958 +#endif
2959
2960  /*
2961  @@ LUAI_MAXCALLS limits the number of nested calls.
2962 @@ -490,101 +509,6 @@
2963  /* }================================================================== */
2964
2965
2966 -
2967 -
2968 -/*
2969 -** {==================================================================
2970 -@@ LUA_NUMBER is the type of numbers in Lua.
2971 -** CHANGE the following definitions only if you want to build Lua
2972 -** with a number type different from double. You may also need to
2973 -** change lua_number2int & lua_number2integer.
2974 -** ===================================================================
2975 -*/
2976 -
2977 -#define LUA_NUMBER_DOUBLE
2978 -#define LUA_NUMBER     double
2979 -
2980 -/*
2981 -@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
2982 -@* over a number.
2983 -*/
2984 -#define LUAI_UACNUMBER double
2985 -
2986 -
2987 -/*
2988 -@@ LUA_NUMBER_SCAN is the format for reading numbers.
2989 -@@ LUA_NUMBER_FMT is the format for writing numbers.
2990 -@@ lua_number2str converts a number to a string.
2991 -@@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
2992 -@@ lua_str2number converts a string to a number.
2993 -*/
2994 -#define LUA_NUMBER_SCAN                "%lf"
2995 -#define LUA_NUMBER_FMT         "%.14g"
2996 -#define lua_number2str(s,n)    sprintf((s), LUA_NUMBER_FMT, (n))
2997 -#define LUAI_MAXNUMBER2STR     32 /* 16 digits, sign, point, and \0 */
2998 -#define lua_str2number(s,p)    strtod((s), (p))
2999 -
3000 -
3001 -/*
3002 -@@ The luai_num* macros define the primitive operations over numbers.
3003 -*/
3004 -#if defined(LUA_CORE)
3005 -#include <math.h>
3006 -#define luai_numadd(a,b)       ((a)+(b))
3007 -#define luai_numsub(a,b)       ((a)-(b))
3008 -#define luai_nummul(a,b)       ((a)*(b))
3009 -#define luai_numdiv(a,b)       ((a)/(b))
3010 -#define luai_nummod(a,b)       ((a) - floor((a)/(b))*(b))
3011 -#define luai_numpow(a,b)       (pow(a,b))
3012 -#define luai_numunm(a)         (-(a))
3013 -#define luai_numeq(a,b)                ((a)==(b))
3014 -#define luai_numlt(a,b)                ((a)<(b))
3015 -#define luai_numle(a,b)                ((a)<=(b))
3016 -#define luai_numisnan(a)       (!luai_numeq((a), (a)))
3017 -#endif
3018 -
3019 -
3020 -/*
3021 -@@ lua_number2int is a macro to convert lua_Number to int.
3022 -@@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
3023 -** CHANGE them if you know a faster way to convert a lua_Number to
3024 -** int (with any rounding method and without throwing errors) in your
3025 -** system. In Pentium machines, a naive typecast from double to int
3026 -** in C is extremely slow, so any alternative is worth trying.
3027 -*/
3028 -
3029 -/* On a Pentium, resort to a trick */
3030 -#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
3031 -    (defined(__i386) || defined (_M_IX86) || defined(__i386__))
3032 -
3033 -/* On a Microsoft compiler, use assembler */
3034 -#if defined(_MSC_VER)
3035 -
3036 -#define lua_number2int(i,d)   __asm fld d   __asm fistp i
3037 -#define lua_number2integer(i,n)                lua_number2int(i, n)
3038 -
3039 -/* the next trick should work on any Pentium, but sometimes clashes
3040 -   with a DirectX idiosyncrasy */
3041 -#else
3042 -
3043 -union luai_Cast { double l_d; long l_l; };
3044 -#define lua_number2int(i,d) \
3045 -  { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
3046 -#define lua_number2integer(i,n)                lua_number2int(i, n)
3047 -
3048 -#endif
3049 -
3050 -
3051 -/* this option always works, but may be slow */
3052 -#else
3053 -#define lua_number2int(i,d)    ((i)=(int)(d))
3054 -#define lua_number2integer(i,d)        ((i)=(lua_Integer)(d))
3055 -
3056 -#endif
3057 -
3058 -/* }================================================================== */
3059 -
3060 -
3061  /*
3062  @@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
3063  ** CHANGE it if your system requires alignments larger than double. (For
3064 @@ -728,28 +652,6 @@ union luai_Cast { double l_d; long l_l;
3065  #define luai_userstateyield(L,n)       ((void)L)
3066
3067
3068 -/*
3069 -@@ LUA_INTFRMLEN is the length modifier for integer conversions
3070 -@* in 'string.format'.
3071 -@@ LUA_INTFRM_T is the integer type correspoding to the previous length
3072 -@* modifier.
3073 -** CHANGE them if your system supports long long or does not support long.
3074 -*/
3075 -
3076 -#if defined(LUA_USELONGLONG)
3077 -
3078 -#define LUA_INTFRMLEN          "ll"
3079 -#define LUA_INTFRM_T           long long
3080 -
3081 -#else
3082 -
3083 -#define LUA_INTFRMLEN          "l"
3084 -#define LUA_INTFRM_T           long
3085 -
3086 -#endif
3087 -
3088 -
3089 -
3090  /* =================================================================== */
3091
3092  /*
3093 --- a/src/lundump.c
3094 +++ b/src/lundump.c
3095 @@ -73,6 +73,13 @@ static lua_Number LoadNumber(LoadState*
3096   return x;
3097  }
3098
3099 +static lua_Integer LoadInteger(LoadState* S)
3100 +{
3101 + lua_Integer x;
3102 + LoadVar(S,x);
3103 + return x;
3104 +}
3105 +
3106  static TString* LoadString(LoadState* S)
3107  {
3108   size_t size;
3109 @@ -119,6 +126,9 @@ static void LoadConstants(LoadState* S,
3110     case LUA_TNUMBER:
3111         setnvalue(o,LoadNumber(S));
3112         break;
3113 +   case LUA_TINT:   /* Integer type saved in bytecode (see lcode.c) */
3114 +       setivalue(o,LoadInteger(S));
3115 +       break;
3116     case LUA_TSTRING:
3117         setsvalue2n(S->L,o,LoadString(S));
3118         break;
3119 @@ -223,5 +233,22 @@ void luaU_header (char* h)
3120   *h++=(char)sizeof(size_t);
3121   *h++=(char)sizeof(Instruction);
3122   *h++=(char)sizeof(lua_Number);
3123 - *h++=(char)(((lua_Number)0.5)==0);            /* is lua_Number integral? */
3124 +
3125 + /*
3126 +  * Last byte of header (0/1 in unpatched Lua 5.1.3):
3127 +  *
3128 +  * 0: lua_Number is float or double, lua_Integer not used. (nonpatched only)
3129 +  * 1: lua_Number is integer (nonpatched only)
3130 +  *
3131 +  * +2: LNUM_INT16: sizeof(lua_Integer)
3132 +  * +4: LNUM_INT32: sizeof(lua_Integer)
3133 +  * +8: LNUM_INT64: sizeof(lua_Integer)
3134 +  *
3135 +  * +0x80: LNUM_COMPLEX
3136 +  */
3137 + *h++ = (char)(sizeof(lua_Integer)
3138 +#ifdef LNUM_COMPLEX
3139 +    | 0x80
3140 +#endif
3141 +    );
3142  }
3143 --- a/src/lvm.c
3144 +++ b/src/lvm.c
3145 @@ -25,22 +25,35 @@
3146  #include "ltable.h"
3147  #include "ltm.h"
3148  #include "lvm.h"
3149 -
3150 -
3151 +#include "llex.h"
3152 +#include "lnum.h"
3153
3154  /* limit for table tag-method chains (to avoid loops) */
3155  #define MAXTAGLOOP     100
3156
3157
3158 -const TValue *luaV_tonumber (const TValue *obj, TValue *n) {
3159 -  lua_Number num;
3160 +/*
3161 + * If 'obj' is a string, it is tried to be interpreted as a number.
3162 + */
3163 +const TValue *luaV_tonumber ( const TValue *obj, TValue *n) {
3164 +  lua_Number d;
3165 +  lua_Integer i;
3166 +
3167    if (ttisnumber(obj)) return obj;
3168 -  if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
3169 -    setnvalue(n, num);
3170 -    return n;
3171 -  }
3172 -  else
3173 -    return NULL;
3174 +
3175 +  if (ttisstring(obj)) {
3176 +    switch( luaO_str2d( svalue(obj), &d, &i ) ) {
3177 +        case TK_INT:
3178 +            setivalue(n,i); return n;
3179 +        case TK_NUMBER:
3180 +            setnvalue(n,d); return n;
3181 +#ifdef LNUM_COMPLEX
3182 +        case TK_NUMBER2:    /* "N.NNNi", != 0 */
3183 +            setnvalue_complex_fast(n, d*I); return n;
3184 +#endif
3185 +        }
3186 +    }
3187 +  return NULL;
3188  }
3189
3190
3191 @@ -49,8 +62,7 @@ int luaV_tostring (lua_State *L, StkId o
3192      return 0;
3193    else {
3194      char s[LUAI_MAXNUMBER2STR];
3195 -    lua_Number n = nvalue(obj);
3196 -    lua_number2str(s, n);
3197 +    luaO_num2buf(s,obj);
3198      setsvalue2s(L, obj, luaS_new(L, s));
3199      return 1;
3200    }
3201 @@ -222,59 +234,127 @@ static int l_strcmp (const TString *ls,
3202  }
3203
3204
3205 +#ifdef LNUM_COMPLEX
3206 +void error_complex( lua_State *L, const TValue *l, const TValue *r )
3207 +{
3208 +  char buf1[ LUAI_MAXNUMBER2STR ];
3209 +  char buf2[ LUAI_MAXNUMBER2STR ];
3210 +  luaO_num2buf( buf1, l );
3211 +  luaO_num2buf( buf2, r );
3212 +  luaG_runerror( L, "unable to compare: %s with %s", buf1, buf2 );
3213 +  /* no return */
3214 +}
3215 +#endif
3216 +
3217 +
3218  int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) {
3219    int res;
3220 -  if (ttype(l) != ttype(r))
3221 +  int tl,tr;
3222 +  lua_Integer tmp;
3223 +
3224 +  if (!ttype_ext_same(l,r))
3225      return luaG_ordererror(L, l, r);
3226 -  else if (ttisnumber(l))
3227 -    return luai_numlt(nvalue(l), nvalue(r));
3228 -  else if (ttisstring(l))
3229 -    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
3230 -  else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
3231 +#ifdef LNUM_COMPLEX
3232 +  if ( (nvalue_img(l)!=0) || (nvalue_img(r)!=0) )
3233 +    error_complex( L, l, r );
3234 +#endif
3235 +  tl= ttype(l); tr= ttype(r);
3236 +  if (tl==tr) {  /* clear arithmetics */
3237 +    switch(tl) {
3238 +      case LUA_TINT:      return ivalue(l) < ivalue(r);
3239 +      case LUA_TNUMBER:   return luai_numlt(nvalue_fast(l), nvalue_fast(r));
3240 +      case LUA_TSTRING:   return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
3241 +    }
3242 +  } else if (tl==LUA_TINT) {  /* l:int, r:num */
3243 +    /* Avoid accuracy losing casts: if 'r' is integer by value, do comparisons
3244 +     * in integer realm. Only otherwise cast 'l' to FP (which might change its
3245 +     * value).
3246 +     */
3247 +    if (tt_integer_valued(r,&tmp))
3248 +        return ivalue(l) < tmp;
3249 +    else
3250 +        return luai_numlt( cast_num(ivalue(l)), nvalue_fast(r) );
3251 +
3252 +  } else if (tl==LUA_TNUMBER) {  /* l:num, r:int */
3253 +    if (tt_integer_valued(l,&tmp))
3254 +        return tmp < ivalue(r);
3255 +    else
3256 +        return luai_numlt( nvalue_fast(l), cast_num(ivalue(r)) );
3257 +
3258 +  } else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
3259      return res;
3260 +
3261    return luaG_ordererror(L, l, r);
3262  }
3263
3264
3265  static int lessequal (lua_State *L, const TValue *l, const TValue *r) {
3266    int res;
3267 -  if (ttype(l) != ttype(r))
3268 +  int tl, tr;
3269 +  lua_Integer tmp;
3270 +
3271 +  if (!ttype_ext_same(l,r))
3272      return luaG_ordererror(L, l, r);
3273 -  else if (ttisnumber(l))
3274 -    return luai_numle(nvalue(l), nvalue(r));
3275 -  else if (ttisstring(l))
3276 -    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
3277 -  else if ((res = call_orderTM(L, l, r, TM_LE)) != -1)  /* first try `le' */
3278 +#ifdef LNUM_COMPLEX
3279 +  if ( (nvalue_img(l)!=0) || (nvalue_img(r)!=0) )
3280 +    error_complex( L, l, r );
3281 +#endif
3282 +  tl= ttype(l); tr= ttype(r);
3283 +  if (tl==tr) {  /* clear arithmetics */
3284 +    switch(tl) {
3285 +      case LUA_TINT:      return ivalue(l) <= ivalue(r);
3286 +      case LUA_TNUMBER:   return luai_numle(nvalue_fast(l), nvalue_fast(r));
3287 +      case LUA_TSTRING:   return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
3288 +    }
3289 +  }
3290 +  if (tl==LUA_TINT) {  /* l:int, r:num */
3291 +    if (tt_integer_valued(r,&tmp))
3292 +        return ivalue(l) <= tmp;
3293 +    else
3294 +        return luai_numle( cast_num(ivalue(l)), nvalue_fast(r) );
3295 +
3296 +  } else if (tl==LUA_TNUMBER) {  /* l:num, r:int */
3297 +    if (tt_integer_valued(l,&tmp))
3298 +        return tmp <= ivalue(r);
3299 +    else
3300 +        return luai_numle( nvalue_fast(l), cast_num(ivalue(r)) );
3301 +
3302 +  } else if ((res = call_orderTM(L, l, r, TM_LE)) != -1)  /* first try `le' */
3303      return res;
3304    else if ((res = call_orderTM(L, r, l, TM_LT)) != -1)  /* else try `lt' */
3305      return !res;
3306 +
3307    return luaG_ordererror(L, l, r);
3308  }
3309
3310
3311 -int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2) {
3312 +/* Note: 'luaV_equalval()' and 'luaO_rawequalObj()' have largely overlapping
3313 + *       implementation. LUA_TNIL..LUA_TLIGHTUSERDATA cases could be handled
3314 + *       simply by the 'default' case here.
3315 + */
3316 +int luaV_equalval (lua_State *L, const TValue *l, const TValue *r) {
3317    const TValue *tm;
3318 -  lua_assert(ttype(t1) == ttype(t2));
3319 -  switch (ttype(t1)) {
3320 +  lua_assert(ttype_ext_same(l,r));
3321 +  switch (ttype(l)) {
3322      case LUA_TNIL: return 1;
3323 -    case LUA_TNUMBER: return luai_numeq(nvalue(t1), nvalue(t2));
3324 -    case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2);  /* true must be 1 !! */
3325 -    case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
3326 +    case LUA_TINT:
3327 +    case LUA_TNUMBER: return luaO_rawequalObj(l,r);
3328 +    case LUA_TBOOLEAN: return bvalue(l) == bvalue(r);  /* true must be 1 !! */
3329 +    case LUA_TLIGHTUSERDATA: return pvalue(l) == pvalue(r);
3330      case LUA_TUSERDATA: {
3331 -      if (uvalue(t1) == uvalue(t2)) return 1;
3332 -      tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable,
3333 -                         TM_EQ);
3334 +      if (uvalue(l) == uvalue(r)) return 1;
3335 +      tm = get_compTM(L, uvalue(l)->metatable, uvalue(r)->metatable, TM_EQ);
3336        break;  /* will try TM */
3337      }
3338      case LUA_TTABLE: {
3339 -      if (hvalue(t1) == hvalue(t2)) return 1;
3340 -      tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
3341 +      if (hvalue(l) == hvalue(r)) return 1;
3342 +      tm = get_compTM(L, hvalue(l)->metatable, hvalue(r)->metatable, TM_EQ);
3343        break;  /* will try TM */
3344      }
3345 -    default: return gcvalue(t1) == gcvalue(t2);
3346 +    default: return gcvalue(l) == gcvalue(r);
3347    }
3348    if (tm == NULL) return 0;  /* no TM? */
3349 -  callTMres(L, L->top, tm, t1, t2);  /* call TM */
3350 +  callTMres(L, L->top, tm, l, r);  /* call TM */
3351    return !l_isfalse(L->top);
3352  }
3353
3354 @@ -314,30 +394,6 @@ void luaV_concat (lua_State *L, int tota
3355  }
3356
3357
3358 -static void Arith (lua_State *L, StkId ra, const TValue *rb,
3359 -                   const TValue *rc, TMS op) {
3360 -  TValue tempb, tempc;
3361 -  const TValue *b, *c;
3362 -  if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
3363 -      (c = luaV_tonumber(rc, &tempc)) != NULL) {
3364 -    lua_Number nb = nvalue(b), nc = nvalue(c);
3365 -    switch (op) {
3366 -      case TM_ADD: setnvalue(ra, luai_numadd(nb, nc)); break;
3367 -      case TM_SUB: setnvalue(ra, luai_numsub(nb, nc)); break;
3368 -      case TM_MUL: setnvalue(ra, luai_nummul(nb, nc)); break;
3369 -      case TM_DIV: setnvalue(ra, luai_numdiv(nb, nc)); break;
3370 -      case TM_MOD: setnvalue(ra, luai_nummod(nb, nc)); break;
3371 -      case TM_POW: setnvalue(ra, luai_numpow(nb, nc)); break;
3372 -      case TM_UNM: setnvalue(ra, luai_numunm(nb)); break;
3373 -      default: lua_assert(0); break;
3374 -    }
3375 -  }
3376 -  else if (!call_binTM(L, rb, rc, ra, op))
3377 -    luaG_aritherror(L, rb, rc);
3378 -}
3379 -
3380 -
3381 -
3382  /*
3383  ** some macros for common tasks in `luaV_execute'
3384  */
3385 @@ -361,17 +417,154 @@ static void Arith (lua_State *L, StkId r
3386  #define Protect(x)     { L->savedpc = pc; {x;}; base = L->base; }
3387
3388
3389 -#define arith_op(op,tm) { \
3390 -        TValue *rb = RKB(i); \
3391 -        TValue *rc = RKC(i); \
3392 -        if (ttisnumber(rb) && ttisnumber(rc)) { \
3393 -          lua_Number nb = nvalue(rb), nc = nvalue(rc); \
3394 -          setnvalue(ra, op(nb, nc)); \
3395 -        } \
3396 -        else \
3397 -          Protect(Arith(L, ra, rb, rc, tm)); \
3398 +/* Note: if called for unary operations, 'rc'=='rb'.
3399 + */
3400 +static void Arith (lua_State *L, StkId ra, const TValue *rb,
3401 +                   const TValue *rc, TMS op) {
3402 +  TValue tempb, tempc;
3403 +  const TValue *b, *c;
3404 +  lua_Number nb,nc;
3405 +
3406 +  if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
3407 +      (c = luaV_tonumber(rc, &tempc)) != NULL) {
3408 +
3409 +    /* Keep integer arithmetics in the integer realm, if possible.
3410 +     */
3411 +    if (ttisint(b) && ttisint(c)) {
3412 +      lua_Integer ib = ivalue(b), ic = ivalue(c);
3413 +      lua_Integer *ri = &ra->value.i;
3414 +      ra->tt= LUA_TINT;  /* part of 'setivalue(ra)' */
3415 +      switch (op) {
3416 +        case TM_ADD: if (try_addint( ri, ib, ic)) return; break;
3417 +        case TM_SUB: if (try_subint( ri, ib, ic)) return; break;
3418 +        case TM_MUL: if (try_mulint( ri, ib, ic)) return; break;
3419 +        case TM_DIV: if (try_divint( ri, ib, ic)) return; break;
3420 +        case TM_MOD: if (try_modint( ri, ib, ic)) return; break;
3421 +        case TM_POW: if (try_powint( ri, ib, ic)) return; break;
3422 +        case TM_UNM: if (try_unmint( ri, ib)) return; break;
3423 +        default: lua_assert(0);
3424 +      }
3425 +    }
3426 +    /* Fallback to floating point, when leaving range. */
3427 +
3428 +#ifdef LNUM_COMPLEX
3429 +    if ((nvalue_img(b)!=0) || (nvalue_img(c)!=0)) {
3430 +      lua_Complex r;
3431 +      if (op==TM_UNM) {
3432 +        r= -nvalue_complex_fast(b);     /* never an integer (or scalar) */
3433 +        setnvalue_complex_fast( ra, r );
3434 +      } else {
3435 +        lua_Complex bb= nvalue_complex(b), cc= nvalue_complex(c);
3436 +        switch (op) {
3437 +          case TM_ADD: r= bb + cc; break;
3438 +          case TM_SUB: r= bb - cc; break;
3439 +          case TM_MUL: r= bb * cc; break;
3440 +          case TM_DIV: r= bb / cc; break;
3441 +          case TM_MOD:
3442 +            luaG_runerror(L, "attempt to use %% on complex numbers");  /* no return */
3443 +          case TM_POW: r= luai_vectpow( bb, cc ); break;
3444 +          default: lua_assert(0); r=0;
3445 +        }
3446 +        setnvalue_complex( ra, r );
3447        }
3448 +      return;
3449 +    }
3450 +#endif
3451 +    nb = nvalue(b); nc = nvalue(c);
3452 +    switch (op) {
3453 +      case TM_ADD: setnvalue(ra, luai_numadd(nb, nc)); return;
3454 +      case TM_SUB: setnvalue(ra, luai_numsub(nb, nc)); return;
3455 +      case TM_MUL: setnvalue(ra, luai_nummul(nb, nc)); return;
3456 +      case TM_DIV: setnvalue(ra, luai_numdiv(nb, nc)); return;
3457 +      case TM_MOD: setnvalue(ra, luai_nummod(nb, nc)); return;
3458 +      case TM_POW: setnvalue(ra, luai_numpow(nb, nc)); return;
3459 +      case TM_UNM: setnvalue(ra, luai_numunm(nb)); return;
3460 +      default: lua_assert(0);
3461 +    }
3462 +  }
3463 +
3464 +  /* Either operand not a number */
3465 +  if (!call_binTM(L, rb, rc, ra, op))
3466 +    luaG_aritherror(L, rb, rc);
3467 +}
3468
3469 +/* Helper macro to sort arithmetic operations into four categories:
3470 + *  TK_INT: integer - integer operands
3471 + *  TK_NUMBER: number - number (non complex, either may be integer)
3472 + *  TK_NUMBER2: complex numbers (at least the other)
3473 + *  0: non-numeric (at least the other)
3474 +*/
3475 +#ifdef LNUM_COMPLEX
3476 +static inline int arith_mode( const TValue *rb, const TValue *rc ) {
3477 +  if (ttisint(rb) && ttisint(rc)) return TK_INT;
3478 +  if (ttiscomplex(rb) || ttiscomplex(rc)) return TK_NUMBER2;
3479 +  if (ttisnumber(rb) && ttisnumber(rc)) return TK_NUMBER;
3480 +  return 0;
3481 +}
3482 +#else
3483 +# define arith_mode(rb,rc) \
3484 +    ( (ttisint(rb) && ttisint(rc)) ? TK_INT : \
3485 +      (ttisnumber(rb) && ttisnumber(rc)) ? TK_NUMBER : 0 )
3486 +#endif
3487 +
3488 +/* arith_op macro for two operators:
3489 + * automatically chooses, which function (number, integer, complex) to use
3490 + */
3491 +#define ARITH_OP2_START( op_num, op_int ) \
3492 +  int failed= 0; \
3493 +  switch( arith_mode(rb,rc) ) { \
3494 +    case TK_INT: \
3495 +      if (op_int ( &(ra)->value.i, ivalue(rb), ivalue(rc) )) \
3496 +        { ra->tt= LUA_TINT; break; } /* else flow through */ \
3497 +    case TK_NUMBER: \
3498 +      setnvalue(ra, op_num ( nvalue(rb), nvalue(rc) )); break;
3499 +
3500 +#define ARITH_OP2_END \
3501 +    default: \
3502 +      failed= 1; break; \
3503 +  } if (!failed) continue;
3504 +
3505 +#define arith_op_continue_scalar( op_num, op_int ) \
3506 +    ARITH_OP2_START( op_num, op_int ) \
3507 +    ARITH_OP2_END
3508 +
3509 +#ifdef LNUM_COMPLEX
3510 +# define arith_op_continue( op_num, op_int, op_complex ) \
3511 +    ARITH_OP2_START( op_num, op_int ) \
3512 +      case TK_NUMBER2: \
3513 +        setnvalue_complex( ra, op_complex ( nvalue_complex(rb), nvalue_complex(rc) ) ); break; \
3514 +    ARITH_OP2_END
3515 +#else
3516 +# define arith_op_continue(op_num,op_int,_) arith_op_continue_scalar(op_num,op_int)
3517 +#endif
3518 +
3519 +/* arith_op macro for one operator:
3520 + */
3521 +#define ARITH_OP1_START( op_num, op_int ) \
3522 +  int failed= 0; \
3523 +  switch( arith_mode(rb,rb) ) { \
3524 +    case TK_INT: \
3525 +      if (op_int ( &(ra)->value.i, ivalue(rb) )) \
3526 +        { ra->tt= LUA_TINT; break; } /* else flow through */ \
3527 +      case TK_NUMBER: \
3528 +        setnvalue(ra, op_num (nvalue(rb))); break; \
3529 +
3530 +#define ARITH_OP1_END \
3531 +      default: \
3532 +        failed= 1; break; \
3533 +  } if (!failed) continue;
3534 +
3535 +#ifdef LNUM_COMPLEX
3536 +# define arith_op1_continue( op_num, op_int, op_complex ) \
3537 +    ARITH_OP1_START( op_num, op_int ) \
3538 +      case TK_NUMBER2: \
3539 +        setnvalue_complex( ra, op_complex ( nvalue_complex_fast(rb) )); break; \
3540 +    ARITH_OP1_END
3541 +#else
3542 +# define arith_op1_continue( op_num, op_int, _ ) \
3543 +    ARITH_OP1_START( op_num, op_int ) \
3544 +    ARITH_OP1_END
3545 +#endif
3546
3547
3548  void luaV_execute (lua_State *L, int nexeccalls) {
3549 @@ -472,38 +665,45 @@ void luaV_execute (lua_State *L, int nex
3550          continue;
3551        }
3552        case OP_ADD: {
3553 -        arith_op(luai_numadd, TM_ADD);
3554 +        TValue *rb = RKB(i), *rc= RKC(i);
3555 +        arith_op_continue( luai_numadd, try_addint, luai_vectadd );
3556 +        Protect(Arith(L, ra, rb, rc, TM_ADD)); \
3557          continue;
3558        }
3559        case OP_SUB: {
3560 -        arith_op(luai_numsub, TM_SUB);
3561 +        TValue *rb = RKB(i), *rc= RKC(i);
3562 +        arith_op_continue( luai_numsub, try_subint, luai_vectsub );
3563 +        Protect(Arith(L, ra, rb, rc, TM_SUB));
3564          continue;
3565        }
3566        case OP_MUL: {
3567 -        arith_op(luai_nummul, TM_MUL);
3568 +        TValue *rb = RKB(i), *rc= RKC(i);
3569 +        arith_op_continue(luai_nummul, try_mulint, luai_vectmul);
3570 +        Protect(Arith(L, ra, rb, rc, TM_MUL));
3571          continue;
3572        }
3573        case OP_DIV: {
3574 -        arith_op(luai_numdiv, TM_DIV);
3575 +        TValue *rb = RKB(i), *rc= RKC(i);
3576 +        arith_op_continue(luai_numdiv, try_divint, luai_vectdiv);
3577 +        Protect(Arith(L, ra, rb, rc, TM_DIV));
3578          continue;
3579        }
3580        case OP_MOD: {
3581 -        arith_op(luai_nummod, TM_MOD);
3582 +        TValue *rb = RKB(i), *rc= RKC(i);
3583 +        arith_op_continue_scalar(luai_nummod, try_modint);  /* scalars only */
3584 +        Protect(Arith(L, ra, rb, rc, TM_MOD));
3585          continue;
3586        }
3587        case OP_POW: {
3588 -        arith_op(luai_numpow, TM_POW);
3589 +        TValue *rb = RKB(i), *rc= RKC(i);
3590 +        arith_op_continue(luai_numpow, try_powint, luai_vectpow);
3591 +        Protect(Arith(L, ra, rb, rc, TM_POW));
3592          continue;
3593        }
3594        case OP_UNM: {
3595          TValue *rb = RB(i);
3596 -        if (ttisnumber(rb)) {
3597 -          lua_Number nb = nvalue(rb);
3598 -          setnvalue(ra, luai_numunm(nb));
3599 -        }
3600 -        else {
3601 -          Protect(Arith(L, ra, rb, rb, TM_UNM));
3602 -        }
3603 +        arith_op1_continue(luai_numunm, try_unmint, luai_vectunm);
3604 +        Protect(Arith(L, ra, rb, rb, TM_UNM));
3605          continue;
3606        }
3607        case OP_NOT: {
3608 @@ -515,11 +715,11 @@ void luaV_execute (lua_State *L, int nex
3609          const TValue *rb = RB(i);
3610          switch (ttype(rb)) {
3611            case LUA_TTABLE: {
3612 -            setnvalue(ra, cast_num(luaH_getn(hvalue(rb))));
3613 +            setivalue(ra, luaH_getn(hvalue(rb)));
3614              break;
3615            }
3616            case LUA_TSTRING: {
3617 -            setnvalue(ra, cast_num(tsvalue(rb)->len));
3618 +            setivalue(ra, tsvalue(rb)->len);
3619              break;
3620            }
3621            default: {  /* try metamethod */
3622 @@ -652,14 +852,30 @@ void luaV_execute (lua_State *L, int nex
3623          }
3624        }
3625        case OP_FORLOOP: {
3626 -        lua_Number step = nvalue(ra+2);
3627 -        lua_Number idx = luai_numadd(nvalue(ra), step); /* increment index */
3628 -        lua_Number limit = nvalue(ra+1);
3629 -        if (luai_numlt(0, step) ? luai_numle(idx, limit)
3630 -                                : luai_numle(limit, idx)) {
3631 -          dojump(L, pc, GETARG_sBx(i));  /* jump back */
3632 -          setnvalue(ra, idx);  /* update internal index... */
3633 -          setnvalue(ra+3, idx);  /* ...and external index */
3634 +        /* If start,step and limit are all integers, we don't need to check
3635 +         * against overflow in the looping.
3636 +         */
3637 +        if (ttisint(ra) && ttisint(ra+1) && ttisint(ra+2)) {
3638 +          lua_Integer step = ivalue(ra+2);
3639 +          lua_Integer idx = ivalue(ra) + step; /* increment index */
3640 +          lua_Integer limit = ivalue(ra+1);
3641 +          if (step > 0 ? (idx <= limit) : (limit <= idx)) {
3642 +            dojump(L, pc, GETARG_sBx(i));  /* jump back */
3643 +            setivalue(ra, idx);  /* update internal index... */
3644 +            setivalue(ra+3, idx);  /* ...and external index */
3645 +          }
3646 +        } else {
3647 +          /* non-integer looping (don't use 'nvalue_fast', some may be integer!)
3648 +          */
3649 +          lua_Number step = nvalue(ra+2);
3650 +          lua_Number idx = luai_numadd(nvalue(ra), step); /* increment index */
3651 +          lua_Number limit = nvalue(ra+1);
3652 +          if (luai_numlt(0, step) ? luai_numle(idx, limit)
3653 +                                  : luai_numle(limit, idx)) {
3654 +            dojump(L, pc, GETARG_sBx(i));  /* jump back */
3655 +            setnvalue(ra, idx);  /* update internal index... */
3656 +            setnvalue(ra+3, idx);  /* ...and external index */
3657 +          }
3658          }
3659          continue;
3660        }
3661 @@ -668,13 +884,21 @@ void luaV_execute (lua_State *L, int nex
3662          const TValue *plimit = ra+1;
3663          const TValue *pstep = ra+2;
3664          L->savedpc = pc;  /* next steps may throw errors */
3665 +        /* Using same location for tonumber's both arguments, effectively does
3666 +         * in-place modification (string->number). */
3667          if (!tonumber(init, ra))
3668            luaG_runerror(L, LUA_QL("for") " initial value must be a number");
3669          else if (!tonumber(plimit, ra+1))
3670            luaG_runerror(L, LUA_QL("for") " limit must be a number");
3671          else if (!tonumber(pstep, ra+2))
3672            luaG_runerror(L, LUA_QL("for") " step must be a number");
3673 -        setnvalue(ra, luai_numsub(nvalue(ra), nvalue(pstep)));
3674 +        /* Step back one value (keep within integers if we can)
3675 +         */
3676 +        if (!( ttisint(ra) && ttisint(pstep) &&
3677 +               try_subint( &ra->value.i, ivalue(ra), ivalue(pstep) ) )) {
3678 +            /* don't use 'nvalue_fast()', values may be integer */
3679 +            setnvalue(ra, luai_numsub(nvalue(ra), nvalue(pstep)));
3680 +        }
3681          dojump(L, pc, GETARG_sBx(i));
3682          continue;
3683        }
3684 @@ -711,7 +935,7 @@ void luaV_execute (lua_State *L, int nex
3685            luaH_resizearray(L, h, last);  /* pre-alloc it at once */
3686          for (; n > 0; n--) {
3687            TValue *val = ra+n;
3688 -          setobj2t(L, luaH_setnum(L, h, last--), val);
3689 +          setobj2t(L, luaH_setint(L, h, last--), val);
3690            luaC_barriert(L, h, val);
3691          }
3692          continue;
3693 --- a/src/lvm.h
3694 +++ b/src/lvm.h
3695 @@ -15,11 +15,9 @@
3696
3697  #define tostring(L,o) ((ttype(o) == LUA_TSTRING) || (luaV_tostring(L, o)))
3698
3699 -#define tonumber(o,n)  (ttype(o) == LUA_TNUMBER || \
3700 -                         (((o) = luaV_tonumber(o,n)) != NULL))
3701 +#define tonumber(o,n) (ttisnumber(o) || (((o) = luaV_tonumber(o,n)) != NULL))
3702
3703 -#define equalobj(L,o1,o2) \
3704 -       (ttype(o1) == ttype(o2) && luaV_equalval(L, o1, o2))
3705 +#define equalobj(L,o1,o2) (ttype_ext_same(o1,o2) && luaV_equalval(L, o1, o2))
3706
3707
3708  LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
3709 --- a/src/print.c
3710 +++ b/src/print.c
3711 @@ -14,6 +14,7 @@
3712  #include "lobject.h"
3713  #include "lopcodes.h"
3714  #include "lundump.h"
3715 +#include "lnum.h"
3716
3717  #define PrintFunction  luaU_print
3718
3719 @@ -59,8 +60,16 @@ static void PrintConstant(const Proto* f
3720    case LUA_TBOOLEAN:
3721         printf(bvalue(o) ? "true" : "false");
3722         break;
3723 +  case LUA_TINT:
3724 +       printf(LUA_INTEGER_FMT,ivalue(o));
3725 +       break;
3726    case LUA_TNUMBER:
3727 -       printf(LUA_NUMBER_FMT,nvalue(o));
3728 +#ifdef LNUM_COMPLEX
3729 +    // TBD: Do we get complex values here?
3730 +    { lua_Number b= nvalue_img_fast(o);
3731 +         printf( LUA_NUMBER_FMT "%s" LUA_NUMBER_FMT "i", nvalue_fast(o), b>=0 ? "+":"", b ); }
3732 +#endif
3733 +       printf(LUA_NUMBER_FMT,nvalue_fast(o));
3734         break;
3735    case LUA_TSTRING:
3736         PrintString(rawtsvalue(o));