com32/lua/src/luaconf.h

   1 /*
   2 ** $Id: luaconf.h,v 1.82.1.6 2008/01/18 17:07:48 roberto Exp $
   3 ** Configuration file for Lua
   4 ** See Copyright Notice in lua.h
   5 */
   6
   7
   8 #ifndef lconfig_h
   9 #define lconfig_h
  10
  11 #include <limits.h>
  12 #include <stddef.h>
  13
  14
  15 /*
  16 ** ==================================================================
  17 ** Search for "@@" to find all configurable definitions.
  18 ** ===================================================================
  19 */
  20
  21
  22 /*
  23 @@ LUA_ANSI controls the use of non-ansi features.
  24 ** CHANGE it (define it) if you want Lua to avoid the use of any
  25 ** non-ansi feature or library.
  26 */
  27 #if defined(__STRICT_ANSI__)
  28 #define LUA_ANSI
  29 #endif
  30
  31
  32 #if !defined(LUA_ANSI) && defined(_WIN32)
  33 #define LUA_WIN
  34 #endif
  35
  36 #if defined(LUA_USE_LINUX)
  37 #define LUA_USE_POSIX
  38 #define LUA_USE_DLOPEN          /* needs an extra library: -ldl */
  39 #define LUA_USE_READLINE        /* needs some extra libraries */
  40 #endif
  41
  42 #if defined(LUA_USE_MACOSX)
  43 #define LUA_USE_POSIX
  44 #define LUA_DL_DYLD             /* does not need extra library */
  45 #endif
  46
  47
  48
  49 /*
  50 @@ LUA_USE_POSIX includes all functionallity listed as X/Open System
  51 @* Interfaces Extension (XSI).
  52 ** CHANGE it (define it) if your system is XSI compatible.
  53 */
  54 #if defined(LUA_USE_POSIX)
  55 #define LUA_USE_MKSTEMP
  56 #define LUA_USE_ISATTY
  57 #define LUA_USE_POPEN
  58 #define LUA_USE_ULONGJMP
  59 #endif
  60
  61
  62 /*
  63 @@ LUA_PATH and LUA_CPATH are the names of the environment variables that
  64 @* Lua check to set its paths.
  65 @@ LUA_INIT is the name of the environment variable that Lua
  66 @* checks for initialization code.
  67 ** CHANGE them if you want different names.
  68 */
  69 #define LUA_PATH        "LUA_PATH"
  70 #define LUA_CPATH       "LUA_CPATH"
  71 #define LUA_INIT        "LUA_INIT"
  72
  73
  74 /*
  75 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
  76 @* Lua libraries.
  77 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
  78 @* C libraries.
  79 ** CHANGE them if your machine has a non-conventional directory
  80 ** hierarchy or if you want to install your libraries in
  81 ** non-conventional directories.
  82 */
  83 #if defined(_WIN32)
  84 /*
  85 ** In Windows, any exclamation mark ('!') in the path is replaced by the
  86 ** path of the directory of the executable file of the current process.
  87 */
  88 #define LUA_LDIR        "!\\lua\\"
  89 #define LUA_CDIR        "!\\"
  90 #define LUA_PATH_DEFAULT  \
  91                 ".\\?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
  92                              LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua"
  93 #define LUA_CPATH_DEFAULT \
  94         ".\\?.dll;"  LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"
  95
  96 #else
  97 #define LUA_ROOT        "/usr/local/"
  98 #define LUA_LDIR        LUA_ROOT "share/lua/5.1/"
  99 #define LUA_CDIR        LUA_ROOT "lib/lua/5.1/"
 100 #define LUA_PATH_DEFAULT  \
 101                 "./?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
 102                             LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua"
 103 #define LUA_CPATH_DEFAULT \
 104         "./?.so;"  LUA_CDIR"?.so;" LUA_CDIR"loadall.so"
 105 #endif
 106
 107
 108 /*
 109 @@ LUA_DIRSEP is the directory separator (for submodules).
 110 ** CHANGE it if your machine does not use "/" as the directory separator
 111 ** and is not Windows. (On Windows Lua automatically uses "\".)
 112 */
 113 #if defined(_WIN32)
 114 #define LUA_DIRSEP      "\\"
 115 #else
 116 #define LUA_DIRSEP      "/"
 117 #endif
 118
 119
 120 /*
 121 @@ LUA_PATHSEP is the character that separates templates in a path.
 122 @@ LUA_PATH_MARK is the string that marks the substitution points in a
 123 @* template.
 124 @@ LUA_EXECDIR in a Windows path is replaced by the executable's
 125 @* directory.
 126 @@ LUA_IGMARK is a mark to ignore all before it when bulding the
 127 @* luaopen_ function name.
 128 ** CHANGE them if for some reason your system cannot use those
 129 ** characters. (E.g., if one of those characters is a common character
 130 ** in file/directory names.) Probably you do not need to change them.
 131 */
 132 #define LUA_PATHSEP     ";"
 133 #define LUA_PATH_MARK   "?"
 134 #define LUA_EXECDIR     "!"
 135 #define LUA_IGMARK      "-"
 136
 137
 138 /*
 139 @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
 140 ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
 141 ** machines, ptrdiff_t gives a good choice between int or long.)
 142 */
 143
 144 /* Changed to long for use with integral Lua numbers. */
 145 #define LUA_INTEGER     long
 146
 147 /*
 148 @@ LUA_API is a mark for all core API functions.
 149 @@ LUALIB_API is a mark for all standard library functions.
 150 ** CHANGE them if you need to define those functions in some special way.
 151 ** For instance, if you want to create one Windows DLL with the core and
 152 ** the libraries, you may want to use the following definition (define
 153 ** LUA_BUILD_AS_DLL to get it).
 154 */
 155 #if defined(LUA_BUILD_AS_DLL)
 156
 157 #if defined(LUA_CORE) || defined(LUA_LIB)
 158 #define LUA_API __declspec(dllexport)
 159 #else
 160 #define LUA_API __declspec(dllimport)
 161 #endif
 162
 163 #else
 164
 165 #define LUA_API         extern
 166
 167 #endif
 168
 169 /* more often than not the libs go together with the core */
 170 #define LUALIB_API      LUA_API
 171
 172
 173 /*
 174 @@ LUAI_FUNC is a mark for all extern functions that are not to be
 175 @* exported to outside modules.
 176 @@ LUAI_DATA is a mark for all extern (const) variables that are not to
 177 @* be exported to outside modules.
 178 ** CHANGE them if you need to mark them in some special way. Elf/gcc
 179 ** (versions 3.2 and later) mark them as "hidden" to optimize access
 180 ** when Lua is compiled as a shared library.
 181 */
 182 #if defined(luaall_c)
 183 #define LUAI_FUNC       static
 184 #define LUAI_DATA       /* empty */
 185
 186 #elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
 187       defined(__ELF__)
 188 #define LUAI_FUNC       __attribute__((visibility("hidden"))) extern
 189 #define LUAI_DATA       LUAI_FUNC
 190
 191 #else
 192 #define LUAI_FUNC       extern
 193 #define LUAI_DATA       extern
 194 #endif
 195
 196
 197
 198 /*
 199 @@ LUA_QL describes how error messages quote program elements.
 200 ** CHANGE it if you want a different appearance.
 201 */
 202 #define LUA_QL(x)       "'" x "'"
 203 #define LUA_QS          LUA_QL("%s")
 204
 205
 206 /*
 207 @@ LUA_IDSIZE gives the maximum size for the description of the source
 208 @* of a function in debug information.
 209 ** CHANGE it if you want a different size.
 210 */
 211 #define LUA_IDSIZE      60
 212
 213
 214 /*
 215 ** {==================================================================
 216 ** Stand-alone configuration
 217 ** ===================================================================
 218 */
 219
 220 #if defined(lua_c) || defined(luaall_c)
 221
 222 /*
 223 @@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that
 224 @* is, whether we're running lua interactively).
 225 ** CHANGE it if you have a better definition for non-POSIX/non-Windows
 226 ** systems.
 227 */
 228 #if defined(LUA_USE_ISATTY)
 229 #include <unistd.h>
 230 #define lua_stdin_is_tty()      isatty(0)
 231 #elif defined(LUA_WIN)
 232 #include <io.h>
 233 #include <stdio.h>
 234 #define lua_stdin_is_tty()      _isatty(_fileno(stdin))
 235 #else
 236 #define lua_stdin_is_tty()      1  /* assume stdin is a tty */
 237 #endif
 238
 239
 240 /*
 241 @@ LUA_PROMPT is the default prompt used by stand-alone Lua.
 242 @@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua.
 243 ** CHANGE them if you want different prompts. (You can also change the
 244 ** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)
 245 */
 246 #define LUA_PROMPT              "> "
 247 #define LUA_PROMPT2             ">> "
 248
 249
 250 /*
 251 @@ LUA_PROGNAME is the default name for the stand-alone Lua program.
 252 ** CHANGE it if your stand-alone interpreter has a different name and
 253 ** your system is not able to detect that name automatically.
 254 */
 255 #define LUA_PROGNAME            "lua"
 256
 257
 258 /*
 259 @@ LUA_MAXINPUT is the maximum length for an input line in the
 260 @* stand-alone interpreter.
 261 ** CHANGE it if you need longer lines.
 262 */
 263 #define LUA_MAXINPUT    512
 264
 265
 266 /*
 267 @@ lua_readline defines how to show a prompt and then read a line from
 268 @* the standard input.
 269 @@ lua_saveline defines how to "save" a read line in a "history".
 270 @@ lua_freeline defines how to free a line read by lua_readline.
 271 ** CHANGE them if you want to improve this functionality (e.g., by using
 272 ** GNU readline and history facilities).
 273 */
 274 #if defined(LUA_USE_READLINE)
 275 #include <stdio.h>
 276 #include <readline/readline.h>
 277 #include <readline/history.h>
 278 #define lua_readline(L,b,p)     ((void)L, ((b)=readline(p)) != NULL)
 279 #define lua_saveline(L,idx) \
 280         if (lua_strlen(L,idx) > 0)  /* non-empty line? */ \
 281           add_history(lua_tostring(L, idx));  /* add it to history */
 282 #define lua_freeline(L,b)       ((void)L, free(b))
 283 #else
 284 #define lua_readline(L,b,p)     \
 285         ((void)L, fputs(p, stdout), fflush(stdout),  /* show prompt */ \
 286         fgets(b, LUA_MAXINPUT, stdin) != NULL)  /* get line */
 287 #define lua_saveline(L,idx)     { (void)L; (void)idx; }
 288 #define lua_freeline(L,b)       { (void)L; (void)b; }
 289 #endif
 290
 291 #endif
 292
 293 /* }================================================================== */
 294
 295
 296 /*
 297 @@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles
 298 @* as a percentage.
 299 ** CHANGE it if you want the GC to run faster or slower (higher values
 300 ** mean larger pauses which mean slower collection.) You can also change
 301 ** this value dynamically.
 302 */
 303 #define LUAI_GCPAUSE    200  /* 200% (wait memory to double before next GC) */
 304
 305
 306 /*
 307 @@ LUAI_GCMUL defines the default speed of garbage collection relative to
 308 @* memory allocation as a percentage.
 309 ** CHANGE it if you want to change the granularity of the garbage
 310 ** collection. (Higher values mean coarser collections. 0 represents
 311 ** infinity, where each step performs a full collection.) You can also
 312 ** change this value dynamically.
 313 */
 314 #define LUAI_GCMUL      200 /* GC runs 'twice the speed' of memory allocation */
 315
 316
 317
 318 /*
 319 @@ LUA_COMPAT_GETN controls compatibility with old getn behavior.
 320 ** CHANGE it (define it) if you want exact compatibility with the
 321 ** behavior of setn/getn in Lua 5.0.
 322 */
 323 #undef LUA_COMPAT_GETN
 324
 325 /*
 326 @@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib.
 327 ** CHANGE it to undefined as soon as you do not need a global 'loadlib'
 328 ** function (the function is still available as 'package.loadlib').
 329 */
 330 #undef LUA_COMPAT_LOADLIB
 331
 332 /*
 333 @@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.
 334 ** CHANGE it to undefined as soon as your programs use only '...' to
 335 ** access vararg parameters (instead of the old 'arg' table).
 336 */
 337 #define LUA_COMPAT_VARARG
 338
 339 /*
 340 @@ LUA_COMPAT_MOD controls compatibility with old math.mod function.
 341 ** CHANGE it to undefined as soon as your programs use 'math.fmod' or
 342 ** the new '%' operator instead of 'math.mod'.
 343 */
 344 #define LUA_COMPAT_MOD
 345
 346 /*
 347 @@ LUA_COMPAT_LSTR controls compatibility with old long string nesting
 348 @* facility.
 349 ** CHANGE it to 2 if you want the old behaviour, or undefine it to turn
 350 ** off the advisory error when nesting [[...]].
 351 */
 352 #define LUA_COMPAT_LSTR         1
 353
 354 /*
 355 @@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.
 356 ** CHANGE it to undefined as soon as you rename 'string.gfind' to
 357 ** 'string.gmatch'.
 358 */
 359 #define LUA_COMPAT_GFIND
 360
 361 /*
 362 @@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib'
 363 @* behavior.
 364 ** CHANGE it to undefined as soon as you replace to 'luaL_register'
 365 ** your uses of 'luaL_openlib'
 366 */
 367 #define LUA_COMPAT_OPENLIB
 368
 369
 370
 371 /*
 372 @@ luai_apicheck is the assert macro used by the Lua-C API.
 373 ** CHANGE luai_apicheck if you want Lua to perform some checks in the
 374 ** parameters it gets from API calls. This may slow down the interpreter
 375 ** a bit, but may be quite useful when debugging C code that interfaces
 376 ** with Lua. A useful redefinition is to use assert.h.
 377 */
 378 #if defined(LUA_USE_APICHECK)
 379 #include <assert.h>
 380 #define luai_apicheck(L,o)      { (void)L; assert(o); }
 381 #else
 382 #define luai_apicheck(L,o)      { (void)L; }
 383 #endif
 384
 385
 386 /*
 387 @@ LUAI_BITSINT defines the number of bits in an int.
 388 ** CHANGE here if Lua cannot automatically detect the number of bits of
 389 ** your machine. Probably you do not need to change this.
 390 */
 391 /* avoid overflows in comparison */
 392 #if INT_MAX-20 < 32760
 393 #define LUAI_BITSINT    16
 394 #elif INT_MAX > 2147483640L
 395 /* int has at least 32 bits */
 396 #define LUAI_BITSINT    32
 397 #else
 398 #error "you must define LUA_BITSINT with number of bits in an integer"
 399 #endif
 400
 401
 402 /*
 403 @@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
 404 @@ LUAI_INT32 is an signed integer with at least 32 bits.
 405 @@ LUAI_UMEM is an unsigned integer big enough to count the total
 406 @* memory used by Lua.
 407 @@ LUAI_MEM is a signed integer big enough to count the total memory
 408 @* used by Lua.
 409 ** CHANGE here if for some weird reason the default definitions are not
 410 ** good enough for your machine. (The definitions in the 'else'
 411 ** part always works, but may waste space on machines with 64-bit
 412 ** longs.) Probably you do not need to change this.
 413 */
 414 #if LUAI_BITSINT >= 32
 415 #define LUAI_UINT32     unsigned int
 416 #define LUAI_INT32      int
 417 #define LUAI_MAXINT32   INT_MAX
 418 #define LUAI_UMEM       size_t
 419 #define LUAI_MEM        ptrdiff_t
 420 #else
 421 /* 16-bit ints */
 422 #define LUAI_UINT32     unsigned long
 423 #define LUAI_INT32      long
 424 #define LUAI_MAXINT32   LONG_MAX
 425 #define LUAI_UMEM       unsigned long
 426 #define LUAI_MEM        long
 427 #endif
 428
 429
 430 /*
 431 @@ LUAI_MAXCALLS limits the number of nested calls.
 432 ** CHANGE it if you need really deep recursive calls. This limit is
 433 ** arbitrary; its only purpose is to stop infinite recursion before
 434 ** exhausting memory.
 435 */
 436 #define LUAI_MAXCALLS   20000
 437
 438
 439 /*
 440 @@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
 441 @* can use.
 442 ** CHANGE it if you need lots of (Lua) stack space for your C
 443 ** functions. This limit is arbitrary; its only purpose is to stop C
 444 ** functions to consume unlimited stack space.
 445 */
 446 #define LUAI_MCS_AUX    ((int)(INT_MAX / (4*sizeof(LUA_NUMBER))))
 447 #define LUAI_MAXCSTACK  (LUAI_MCS_AUX > SHRT_MAX ? SHRT_MAX : LUAI_MCS_AUX)
 448
 449
 450
 451 /*
 452 ** {==================================================================
 453 ** CHANGE (to smaller values) the following definitions if your system
 454 ** has a small C stack. (Or you may want to change them to larger
 455 ** values if your system has a large C stack and these limits are
 456 ** too rigid for you.) Some of these constants control the size of
 457 ** stack-allocated arrays used by the compiler or the interpreter, while
 458 ** others limit the maximum number of recursive calls that the compiler
 459 ** or the interpreter can perform. Values too large may cause a C stack
 460 ** overflow for some forms of deep constructs.
 461 ** ===================================================================
 462 */
 463
 464
 465 /*
 466 @@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and
 467 @* syntactical nested non-terminals in a program.
 468 */
 469 #define LUAI_MAXCCALLS          200
 470
 471
 472 /*
 473 @@ LUAI_MAXVARS is the maximum number of local variables per function
 474 @* (must be smaller than 250).
 475 */
 476 #define LUAI_MAXVARS            200
 477
 478
 479 /*
 480 @@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
 481 @* (must be smaller than 250).
 482 */
 483 #define LUAI_MAXUPVALUES        60
 484
 485
 486 /*
 487 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
 488 */
 489 #define LUAL_BUFFERSIZE         BUFSIZ
 490
 491 /* }================================================================== */
 492
 493
 494
 495
 496 /*
 497 ** {==================================================================
 498 @@ LUA_NUMBER is the type of numbers in Lua.
 499 ** CHANGE the following definitions only if you want to build Lua
 500 ** with a number type different from double. You may also need to
 501 ** change lua_number2int & lua_number2integer.
 502 ** ===================================================================
 503 */
 504
 505 /* Define LUA_NUMBER_INTEGRAL to produce a system that uses no
 506    floating point operations by changing the type of Lua numbers from
 507    double to long.  It implements division and modulus so that
 508
 509    x == (x / y) * y + x % y.
 510
 511    The exponentiation function returns zero for negative exponents.
 512    Defining LUA_NUMBER_INTEGRAL also removes the difftime function,
 513    and the math module should not be used.  The string.format function
 514    no longer handles the floating point directives %e, %E, %f, %g, and
 515    %G. */
 516
 517 #define LUA_NUMBER_INTEGRAL
 518 #if defined LUA_NUMBER_INTEGRAL
 519 #define LUA_NUMBER      long
 520 #else
 521 #define LUA_NUMBER_DOUBLE
 522 #define LUA_NUMBER      double
 523 #endif
 524
 525 /*
 526 @@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
 527 @* over a number.
 528 */
 529 #define LUAI_UACNUMBER  LUA_NUMBER
 530
 531
 532 /*
 533 @@ LUA_NUMBER_SCAN is the format for reading numbers.
 534 @@ LUA_NUMBER_FMT is the format for writing numbers.
 535 @@ lua_number2str converts a number to a string.
 536 @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
 537 @@ lua_str2number converts a string to a number.
 538 */
 539 #if defined LUA_NUMBER_INTEGRAL
 540 #define LUA_NUMBER_SCAN         "%ld"
 541 #define LUA_NUMBER_FMT          "%ld"
 542 #else
 543 #define LUA_NUMBER_SCAN         "%lf"
 544 #define LUA_NUMBER_FMT          "%.14g"
 545 #endif
 546 #define lua_number2str(s,n)     sprintf((s), LUA_NUMBER_FMT, (n))
 547 #define LUAI_MAXNUMBER2STR      32 /* 16 digits, sign, point, and \0 */
 548 #if defined LUA_NUMBER_INTEGRAL
 549 #define lua_str2number(s,p)     strtol((s), (p), 10)
 550 #else
 551 #define lua_str2number(s,p)     strtod((s), (p))
 552 #endif
 553
 554
 555 /*
 556 @@ The luai_num* macros define the primitive operations over numbers.
 557 */
 558 #if defined(LUA_CORE)
 559 #include <math.h>
 560 #define luai_numadd(a,b)        ((a)+(b))
 561 #define luai_numsub(a,b)        ((a)-(b))
 562 #define luai_nummul(a,b)        ((a)*(b))
 563 #if defined LUA_NUMBER_INTEGRAL
 564 #define luai_numdiv(a,b)        \
 565   (-1/2?                        \
 566    (a)/(b):                     \
 567    (((a)<0)==((b)<0)||(a)%(b)==0?               \
 568     (a)/(b):                    \
 569     (a)/(b)-1))
 570 #define luai_nummod(a,b)        \
 571   (-1/2?                        \
 572    (a)%(b):                     \
 573    (((a)<0)==((b)<0)||(a)%(b)==0?               \
 574     (a)%(b):                    \
 575     (a)%(b)+(b)))
 576 #define luai_lnumdiv(a,b)       \
 577   ((b)==0?                      \
 578    (luaG_runerror(L,"divide by zero"),0): \
 579    luai_numdiv(a,b))
 580 #define luai_lnummod(a,b)       \
 581   ((b)==0?                      \
 582    (luaG_runerror(L,"modulo by zero"),0): \
 583    luai_nummod(a,b))
 584 LUA_NUMBER luai_ipow(LUA_NUMBER, LUA_NUMBER);
 585 #define luai_numpow(a,b)        (luai_ipow(a,b))
 586 #else
 587 #define luai_numdiv(a,b)        ((a)/(b))
 588 #define luai_nummod(a,b)        ((a) - floor((a)/(b))*(b))
 589 #define luai_lnumdiv(a,b)       (luai_numdiv(a,b))
 590 #define luai_lnummod(a,b)       (luai_nummod(a,b))
 591 #define luai_numpow(a,b)        (pow(a,b))
 592 #endif
 593 #define luai_numunm(a)          (-(a))
 594 #define luai_numeq(a,b)         ((a)==(b))
 595 #define luai_numlt(a,b)         ((a)<(b))
 596 #define luai_numle(a,b)         ((a)<=(b))
 597 #define luai_numisnan(a)        (!luai_numeq((a), (a)))
 598 #endif
 599
 600
 601 /*
 602 @@ lua_number2int is a macro to convert lua_Number to int.
 603 @@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
 604 ** CHANGE them if you know a faster way to convert a lua_Number to
 605 ** int (with any rounding method and without throwing errors) in your
 606 ** system. In Pentium machines, a naive typecast from double to int
 607 ** in C is extremely slow, so any alternative is worth trying.
 608 */
 609
 610 /* On a Pentium, resort to a trick */
 611 #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
 612     (defined(__i386) || defined (_M_IX86) || defined(__i386__))
 613
 614 /* On a Microsoft compiler, use assembler */
 615 #if defined(_MSC_VER)
 616
 617 #define lua_number2int(i,d)   __asm fld d   __asm fistp i
 618 #define lua_number2integer(i,n)         lua_number2int(i, n)
 619
 620 /* the next trick should work on any Pentium, but sometimes clashes
 621    with a DirectX idiosyncrasy */
 622 #else
 623
 624 union luai_Cast { double l_d; long l_l; };
 625 #define lua_number2int(i,d) \
 626   { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
 627 #define lua_number2integer(i,n)         lua_number2int(i, n)
 628
 629 #endif
 630
 631
 632 /* this option always works, but may be slow */
 633 #else
 634 #define lua_number2int(i,d)     ((i)=(int)(d))
 635 #define lua_number2integer(i,d) ((i)=(lua_Integer)(d))
 636
 637 #endif
 638
 639 /* }================================================================== */
 640
 641
 642 /*
 643 @@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
 644 ** CHANGE it if your system requires alignments larger than double. (For
 645 ** instance, if your system supports long doubles and they must be
 646 ** aligned in 16-byte boundaries, then you should add long double in the
 647 ** union.) Probably you do not need to change this.
 648 */
 649 #define LUAI_USER_ALIGNMENT_T   union { double u; void *s; long l; }
 650
 651
 652 /*
 653 @@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.
 654 ** CHANGE them if you prefer to use longjmp/setjmp even with C++
 655 ** or if want/don't to use _longjmp/_setjmp instead of regular
 656 ** longjmp/setjmp. By default, Lua handles errors with exceptions when
 657 ** compiling as C++ code, with _longjmp/_setjmp when asked to use them,
 658 ** and with longjmp/setjmp otherwise.
 659 */
 660 #if defined(__cplusplus)
 661 /* C++ exceptions */
 662 #define LUAI_THROW(L,c) throw(c)
 663 #define LUAI_TRY(L,c,a) try { a } catch(...) \
 664         { if ((c)->status == 0) (c)->status = -1; }
 665 #define luai_jmpbuf     int  /* dummy variable */
 666
 667 #elif defined(LUA_USE_ULONGJMP)
 668 /* in Unix, try _longjmp/_setjmp (more efficient) */
 669 #define LUAI_THROW(L,c) _longjmp((c)->b, 1)
 670 #define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }
 671 #define luai_jmpbuf     jmp_buf
 672
 673 #else
 674 /* default handling with long jumps */
 675 #define LUAI_THROW(L,c) longjmp((c)->b, 1)
 676 #define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }
 677 #define luai_jmpbuf     jmp_buf
 678
 679 #endif
 680
 681
 682 /*
 683 @@ LUA_MAXCAPTURES is the maximum number of captures that a pattern
 684 @* can do during pattern-matching.
 685 ** CHANGE it if you need more captures. This limit is arbitrary.
 686 */
 687 #define LUA_MAXCAPTURES         32
 688
 689
 690 /*
 691 @@ lua_tmpnam is the function that the OS library uses to create a
 692 @* temporary name.
 693 @@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam.
 694 ** CHANGE them if you have an alternative to tmpnam (which is considered
 695 ** insecure) or if you want the original tmpnam anyway.  By default, Lua
 696 ** uses tmpnam except when POSIX is available, where it uses mkstemp.
 697 */
 698 #if defined(loslib_c) || defined(luaall_c)
 699
 700 #if defined(LUA_USE_MKSTEMP)
 701 #include <unistd.h>
 702 #define LUA_TMPNAMBUFSIZE       32
 703 #define lua_tmpnam(b,e) { \
 704         strcpy(b, "/tmp/lua_XXXXXX"); \
 705         e = mkstemp(b); \
 706         if (e != -1) close(e); \
 707         e = (e == -1); }
 708
 709 #else
 710 #define LUA_TMPNAMBUFSIZE       L_tmpnam
 711 #define lua_tmpnam(b,e)         { e = (tmpnam(b) == NULL); }
 712 #endif
 713
 714 #endif
 715
 716
 717 /*
 718 @@ lua_popen spawns a new process connected to the current one through
 719 @* the file streams.
 720 ** CHANGE it if you have a way to implement it in your system.
 721 */
 722 #if defined(LUA_USE_POPEN)
 723
 724 #define lua_popen(L,c,m)        ((void)L, fflush(NULL), popen(c,m))
 725 #define lua_pclose(L,file)      ((void)L, (pclose(file) != -1))
 726
 727 #elif defined(LUA_WIN)
 728
 729 #define lua_popen(L,c,m)        ((void)L, _popen(c,m))
 730 #define lua_pclose(L,file)      ((void)L, (_pclose(file) != -1))
 731
 732 #else
 733
 734 #define lua_popen(L,c,m)        ((void)((void)c, m),  \
 735                 luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
 736 #define lua_pclose(L,file)              ((void)((void)L, file), 0)
 737
 738 #endif
 739
 740 /*
 741 @@ LUA_DL_* define which dynamic-library system Lua should use.
 742 ** CHANGE here if Lua has problems choosing the appropriate
 743 ** dynamic-library system for your platform (either Windows' DLL, Mac's
 744 ** dyld, or Unix's dlopen). If your system is some kind of Unix, there
 745 ** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for
 746 ** it.  To use dlopen you also need to adapt the src/Makefile (probably
 747 ** adding -ldl to the linker options), so Lua does not select it
 748 ** automatically.  (When you change the makefile to add -ldl, you must
 749 ** also add -DLUA_USE_DLOPEN.)
 750 ** If you do not want any kind of dynamic library, undefine all these
 751 ** options.
 752 ** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD.
 753 */
 754 #if defined(LUA_USE_DLOPEN)
 755 #define LUA_DL_DLOPEN
 756 #endif
 757
 758 #if defined(LUA_WIN)
 759 #define LUA_DL_DLL
 760 #endif
 761
 762
 763 /*
 764 @@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
 765 @* (the data goes just *before* the lua_State pointer).
 766 ** CHANGE (define) this if you really need that. This value must be
 767 ** a multiple of the maximum alignment required for your machine.
 768 */
 769 #define LUAI_EXTRASPACE         0
 770
 771
 772 /*
 773 @@ luai_userstate* allow user-specific actions on threads.
 774 ** CHANGE them if you defined LUAI_EXTRASPACE and need to do something
 775 ** extra when a thread is created/deleted/resumed/yielded.
 776 */
 777 #define luai_userstateopen(L)           ((void)L)
 778 #define luai_userstateclose(L)          ((void)L)
 779 #define luai_userstatethread(L,L1)      ((void)L)
 780 #define luai_userstatefree(L)           ((void)L)
 781 #define luai_userstateresume(L,n)       ((void)L)
 782 #define luai_userstateyield(L,n)        ((void)L)
 783
 784
 785 /*
 786 @@ LUA_INTFRMLEN is the length modifier for integer conversions
 787 @* in 'string.format'.
 788 @@ LUA_INTFRM_T is the integer type correspoding to the previous length
 789 @* modifier.
 790 ** CHANGE them if your system supports long long or does not support long.
 791 */
 792
 793 #if defined(LUA_USELONGLONG)
 794
 795 #define LUA_INTFRMLEN           "ll"
 796 #define LUA_INTFRM_T            long long
 797
 798 #else
 799
 800 #define LUA_INTFRMLEN           "l"
 801 #define LUA_INTFRM_T            long
 802
 803 #endif
 804
 805
 806
 807 /* =================================================================== */
 808
 809 /*
 810 ** Local configuration. You can use this space to add your redefinitions
 811 ** without modifying the main part of the file.
 812 */
 813
 814
 815
 816 #endif
 817