external/mit/lua/dist/src/luaconf.h

   1 /*      $NetBSD: luaconf.h,v 1.4 2012/03/15 01:02:19 alnsn Exp $        */
   2
   3 /*
   4 ** Id: luaconf.h,v 1.82.1.7 2008/02/11 16:25:08 roberto Exp $
   5 ** Configuration file for Lua
   6 ** See Copyright Notice in lua.h
   7 */
   8
   9
  10 #ifndef lconfig_h
  11 #define lconfig_h
  12
  13 #include <limits.h>
  14 #include <stddef.h>
  15
  16
  17 /*
  18 ** ==================================================================
  19 ** Search for "@@" to find all configurable definitions.
  20 ** ===================================================================
  21 */
  22
  23
  24 /*
  25 @@ LUA_ANSI controls the use of non-ansi features.
  26 ** CHANGE it (define it) if you want Lua to avoid the use of any
  27 ** non-ansi feature or library.
  28 */
  29 #if defined(__STRICT_ANSI__)
  30 #define LUA_ANSI
  31 #endif
  32
  33
  34 #if !defined(LUA_ANSI) && defined(_WIN32)
  35 #define LUA_WIN
  36 #endif
  37
  38 #if defined(LUA_USE_LINUX)
  39 #define LUA_USE_POSIX
  40 #define LUA_USE_DLOPEN          /* needs an extra library: -ldl */
  41 #define LUA_USE_READLINE        /* needs some extra libraries */
  42 #endif
  43
  44 #if defined(LUA_USE_MACOSX)
  45 #define LUA_USE_POSIX
  46 #define LUA_DL_DYLD             /* does not need extra library */
  47 #endif
  48
  49
  50
  51 /*
  52 @@ LUA_USE_POSIX includes all functionallity listed as X/Open System
  53 @* Interfaces Extension (XSI).
  54 ** CHANGE it (define it) if your system is XSI compatible.
  55 */
  56 #if defined(LUA_USE_POSIX)
  57 #define LUA_USE_MKSTEMP
  58 #define LUA_USE_ISATTY
  59 #define LUA_USE_POPEN
  60 #define LUA_USE_ULONGJMP
  61 #endif
  62
  63
  64 /*
  65 @@ LUA_PATH and LUA_CPATH are the names of the environment variables that
  66 @* Lua check to set its paths.
  67 @@ LUA_INIT is the name of the environment variable that Lua
  68 @* checks for initialization code.
  69 ** CHANGE them if you want different names.
  70 */
  71 #define LUA_PATH        "LUA_PATH"
  72 #define LUA_CPATH       "LUA_CPATH"
  73 #define LUA_INIT        "LUA_INIT"
  74
  75
  76 /*
  77 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
  78 @* Lua libraries.
  79 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
  80 @* C libraries.
  81 ** CHANGE them if your machine has a non-conventional directory
  82 ** hierarchy or if you want to install your libraries in
  83 ** non-conventional directories.
  84 */
  85 #if defined(_WIN32)
  86 /*
  87 ** In Windows, any exclamation mark ('!') in the path is replaced by the
  88 ** path of the directory of the executable file of the current process.
  89 */
  90 #define LUA_LDIR        "!\\lua\\"
  91 #define LUA_CDIR        "!\\"
  92 #define LUA_PATH_DEFAULT  \
  93                 ".\\?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
  94                              LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua"
  95 #define LUA_CPATH_DEFAULT \
  96         ".\\?.dll;"  LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"
  97
  98 #else
  99 #define LUA_ROOT        "/usr/"
 100 #define LUA_LDIR        LUA_ROOT "share/lua/5.1/"
 101 #define LUA_CDIR        LUA_ROOT "lib/lua/5.1/"
 102
 103 /*
 104  * The original Lua distribution contain "./?.lua" at the beginning
 105  * of LUA_PATH_DEFAULT and "./?.so" at the beginning of LUA_CPATH_DEFAULT.
 106  * These path elements have been removed for the NetBSD version of Lua
 107  * to avoid potential security problems.
 108  */
 109 #define LUA_PATH_DEFAULT  \
 110         LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
 111         LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua"
 112 #define LUA_CPATH_DEFAULT \
 113         LUA_CDIR"?.so;" LUA_CDIR"loadall.so"
 114 #endif
 115
 116
 117 /*
 118 @@ LUA_DIRSEP is the directory separator (for submodules).
 119 ** CHANGE it if your machine does not use "/" as the directory separator
 120 ** and is not Windows. (On Windows Lua automatically uses "\".)
 121 */
 122 #if defined(_WIN32)
 123 #define LUA_DIRSEP      "\\"
 124 #else
 125 #define LUA_DIRSEP      "/"
 126 #endif
 127
 128
 129 /*
 130 @@ LUA_PATHSEP is the character that separates templates in a path.
 131 @@ LUA_PATH_MARK is the string that marks the substitution points in a
 132 @* template.
 133 @@ LUA_EXECDIR in a Windows path is replaced by the executable's
 134 @* directory.
 135 @@ LUA_IGMARK is a mark to ignore all before it when bulding the
 136 @* luaopen_ function name.
 137 ** CHANGE them if for some reason your system cannot use those
 138 ** characters. (E.g., if one of those characters is a common character
 139 ** in file/directory names.) Probably you do not need to change them.
 140 */
 141 #define LUA_PATHSEP     ";"
 142 #define LUA_PATH_MARK   "?"
 143 #define LUA_EXECDIR     "!"
 144 #define LUA_IGMARK      "-"
 145
 146
 147 /*
 148 @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
 149 ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
 150 ** machines, ptrdiff_t gives a good choice between int or long.)
 151 */
 152 #define LUA_INTEGER     ptrdiff_t
 153
 154
 155 /*
 156 @@ LUA_API is a mark for all core API functions.
 157 @@ LUALIB_API is a mark for all standard library functions.
 158 ** CHANGE them if you need to define those functions in some special way.
 159 ** For instance, if you want to create one Windows DLL with the core and
 160 ** the libraries, you may want to use the following definition (define
 161 ** LUA_BUILD_AS_DLL to get it).
 162 */
 163 #if defined(LUA_BUILD_AS_DLL)
 164
 165 #if defined(LUA_CORE) || defined(LUA_LIB)
 166 #define LUA_API __declspec(dllexport)
 167 #else
 168 #define LUA_API __declspec(dllimport)
 169 #endif
 170
 171 #else
 172
 173 #define LUA_API         extern
 174
 175 #endif
 176
 177 /* more often than not the libs go together with the core */
 178 #define LUALIB_API      LUA_API
 179
 180
 181 /*
 182 @@ LUAI_FUNC is a mark for all extern functions that are not to be
 183 @* exported to outside modules.
 184 @@ LUAI_DATA is a mark for all extern (const) variables that are not to
 185 @* be exported to outside modules.
 186 ** CHANGE them if you need to mark them in some special way. Elf/gcc
 187 ** (versions 3.2 and later) mark them as "hidden" to optimize access
 188 ** when Lua is compiled as a shared library.
 189 */
 190 #if defined(luaall_c)
 191 #define LUAI_FUNC       static
 192 #define LUAI_DATA       /* empty */
 193
 194 #elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
 195       defined(__ELF__)
 196 #define LUAI_FUNC       __attribute__((visibility("hidden"))) extern
 197 #define LUAI_DATA       LUAI_FUNC
 198
 199 #else
 200 #define LUAI_FUNC       extern
 201 #define LUAI_DATA       extern
 202 #endif
 203
 204
 205
 206 /*
 207 @@ LUA_QL describes how error messages quote program elements.
 208 ** CHANGE it if you want a different appearance.
 209 */
 210 #define LUA_QL(x)       "'" x "'"
 211 #define LUA_QS          LUA_QL("%s")
 212
 213
 214 /*
 215 @@ LUA_IDSIZE gives the maximum size for the description of the source
 216 @* of a function in debug information.
 217 ** CHANGE it if you want a different size.
 218 */
 219 #define LUA_IDSIZE      60
 220
 221
 222 /*
 223 ** {==================================================================
 224 ** Stand-alone configuration
 225 ** ===================================================================
 226 */
 227
 228 #if defined(lua_c) || defined(luaall_c)
 229
 230 /*
 231 @@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that
 232 @* is, whether we're running lua interactively).
 233 ** CHANGE it if you have a better definition for non-POSIX/non-Windows
 234 ** systems.
 235 */
 236 #if defined(LUA_USE_ISATTY)
 237 #include <unistd.h>
 238 #define lua_stdin_is_tty()      isatty(0)
 239 #elif defined(LUA_WIN)
 240 #include <io.h>
 241 #include <stdio.h>
 242 #define lua_stdin_is_tty()      _isatty(_fileno(stdin))
 243 #else
 244 #define lua_stdin_is_tty()      1  /* assume stdin is a tty */
 245 #endif
 246
 247
 248 /*
 249 @@ LUA_PROMPT is the default prompt used by stand-alone Lua.
 250 @@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua.
 251 ** CHANGE them if you want different prompts. (You can also change the
 252 ** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)
 253 */
 254 #define LUA_PROMPT              "> "
 255 #define LUA_PROMPT2             ">> "
 256
 257
 258 /*
 259 @@ LUA_PROGNAME is the default name for the stand-alone Lua program.
 260 ** CHANGE it if your stand-alone interpreter has a different name and
 261 ** your system is not able to detect that name automatically.
 262 */
 263 #define LUA_PROGNAME            "lua"
 264
 265
 266 /*
 267 @@ LUA_MAXINPUT is the maximum length for an input line in the
 268 @* stand-alone interpreter.
 269 ** CHANGE it if you need longer lines.
 270 */
 271 #define LUA_MAXINPUT    512
 272
 273
 274 /*
 275 @@ lua_readline defines how to show a prompt and then read a line from
 276 @* the standard input.
 277 @@ lua_saveline defines how to "save" a read line in a "history".
 278 @@ lua_freeline defines how to free a line read by lua_readline.
 279 ** CHANGE them if you want to improve this functionality (e.g., by using
 280 ** GNU readline and history facilities).
 281 */
 282 #if defined(LUA_USE_READLINE)
 283 #include <stdio.h>
 284 #include <readline/readline.h>
 285 #include <readline/history.h>
 286 #define lua_readline(L,b,p)     ((void)L, ((b)=readline(p)) != NULL)
 287 #define lua_saveline(L,idx) \
 288         if (lua_strlen(L,idx) > 0)  /* non-empty line? */ \
 289           add_history(lua_tostring(L, idx));  /* add it to history */
 290 #define lua_freeline(L,b)       ((void)L, free(b))
 291 #else
 292 #define lua_readline(L,b,p)     \
 293         ((void)L, fputs(p, stdout), fflush(stdout),  /* show prompt */ \
 294         fgets(b, LUA_MAXINPUT, stdin) != NULL)  /* get line */
 295 #define lua_saveline(L,idx)     { (void)L; (void)idx; }
 296 #define lua_freeline(L,b)       { (void)L; (void)b; }
 297 #endif
 298
 299 #endif
 300
 301 /* }================================================================== */
 302
 303
 304 /*
 305 @@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles
 306 @* as a percentage.
 307 ** CHANGE it if you want the GC to run faster or slower (higher values
 308 ** mean larger pauses which mean slower collection.) You can also change
 309 ** this value dynamically.
 310 */
 311 #define LUAI_GCPAUSE    200  /* 200% (wait memory to double before next GC) */
 312
 313
 314 /*
 315 @@ LUAI_GCMUL defines the default speed of garbage collection relative to
 316 @* memory allocation as a percentage.
 317 ** CHANGE it if you want to change the granularity of the garbage
 318 ** collection. (Higher values mean coarser collections. 0 represents
 319 ** infinity, where each step performs a full collection.) You can also
 320 ** change this value dynamically.
 321 */
 322 #define LUAI_GCMUL      200 /* GC runs 'twice the speed' of memory allocation */
 323
 324
 325
 326 /*
 327 @@ LUA_COMPAT_GETN controls compatibility with old getn behavior.
 328 ** CHANGE it (define it) if you want exact compatibility with the
 329 ** behavior of setn/getn in Lua 5.0.
 330 */
 331 #undef LUA_COMPAT_GETN
 332
 333 /*
 334 @@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib.
 335 ** CHANGE it to undefined as soon as you do not need a global 'loadlib'
 336 ** function (the function is still available as 'package.loadlib').
 337 */
 338 #undef LUA_COMPAT_LOADLIB
 339
 340 /*
 341 @@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.
 342 ** CHANGE it to undefined as soon as your programs use only '...' to
 343 ** access vararg parameters (instead of the old 'arg' table).
 344 */
 345 #define LUA_COMPAT_VARARG
 346
 347 /*
 348 @@ LUA_COMPAT_MOD controls compatibility with old math.mod function.
 349 ** CHANGE it to undefined as soon as your programs use 'math.fmod' or
 350 ** the new '%' operator instead of 'math.mod'.
 351 */
 352 #define LUA_COMPAT_MOD
 353
 354 /*
 355 @@ LUA_COMPAT_LSTR controls compatibility with old long string nesting
 356 @* facility.
 357 ** CHANGE it to 2 if you want the old behaviour, or undefine it to turn
 358 ** off the advisory error when nesting [[...]].
 359 */
 360 #define LUA_COMPAT_LSTR         1
 361
 362 /*
 363 @@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.
 364 ** CHANGE it to undefined as soon as you rename 'string.gfind' to
 365 ** 'string.gmatch'.
 366 */
 367 #define LUA_COMPAT_GFIND
 368
 369 /*
 370 @@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib'
 371 @* behavior.
 372 ** CHANGE it to undefined as soon as you replace to 'luaL_register'
 373 ** your uses of 'luaL_openlib'
 374 */
 375 #define LUA_COMPAT_OPENLIB
 376
 377
 378
 379 /*
 380 @@ luai_apicheck is the assert macro used by the Lua-C API.
 381 ** CHANGE luai_apicheck if you want Lua to perform some checks in the
 382 ** parameters it gets from API calls. This may slow down the interpreter
 383 ** a bit, but may be quite useful when debugging C code that interfaces
 384 ** with Lua. A useful redefinition is to use assert.h.
 385 */
 386 #if defined(LUA_USE_APICHECK)
 387 #include <assert.h>
 388 #define luai_apicheck(L,o)      { (void)L; assert(o); }
 389 #else
 390 #define luai_apicheck(L,o)      { (void)L; }
 391 #endif
 392
 393
 394 /*
 395 @@ LUAI_BITSINT defines the number of bits in an int.
 396 ** CHANGE here if Lua cannot automatically detect the number of bits of
 397 ** your machine. Probably you do not need to change this.
 398 */
 399 /* avoid overflows in comparison */
 400 #if INT_MAX-20 < 32760
 401 #define LUAI_BITSINT    16
 402 #elif INT_MAX > 2147483640L
 403 /* int has at least 32 bits */
 404 #define LUAI_BITSINT    32
 405 #else
 406 #error "you must define LUA_BITSINT with number of bits in an integer"
 407 #endif
 408
 409
 410 /*
 411 @@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
 412 @@ LUAI_INT32 is an signed integer with at least 32 bits.
 413 @@ LUAI_UMEM is an unsigned integer big enough to count the total
 414 @* memory used by Lua.
 415 @@ LUAI_MEM is a signed integer big enough to count the total memory
 416 @* used by Lua.
 417 ** CHANGE here if for some weird reason the default definitions are not
 418 ** good enough for your machine. (The definitions in the 'else'
 419 ** part always works, but may waste space on machines with 64-bit
 420 ** longs.) Probably you do not need to change this.
 421 */
 422 #if LUAI_BITSINT >= 32
 423 #define LUAI_UINT32     unsigned int
 424 #define LUAI_INT32      int
 425 #define LUAI_MAXINT32   INT_MAX
 426 #define LUAI_UMEM       size_t
 427 #define LUAI_MEM        ptrdiff_t
 428 #else
 429 /* 16-bit ints */
 430 #define LUAI_UINT32     unsigned long
 431 #define LUAI_INT32      long
 432 #define LUAI_MAXINT32   LONG_MAX
 433 #define LUAI_UMEM       unsigned long
 434 #define LUAI_MEM        long
 435 #endif
 436
 437
 438 /*
 439 @@ LUAI_MAXCALLS limits the number of nested calls.
 440 ** CHANGE it if you need really deep recursive calls. This limit is
 441 ** arbitrary; its only purpose is to stop infinite recursion before
 442 ** exhausting memory.
 443 */
 444 #define LUAI_MAXCALLS   20000
 445
 446
 447 /*
 448 @@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
 449 @* can use.
 450 ** CHANGE it if you need lots of (Lua) stack space for your C
 451 ** functions. This limit is arbitrary; its only purpose is to stop C
 452 ** functions to consume unlimited stack space. (must be smaller than
 453 ** -LUA_REGISTRYINDEX)
 454 */
 455 #define LUAI_MAXCSTACK  8000
 456
 457
 458
 459 /*
 460 ** {==================================================================
 461 ** CHANGE (to smaller values) the following definitions if your system
 462 ** has a small C stack. (Or you may want to change them to larger
 463 ** values if your system has a large C stack and these limits are
 464 ** too rigid for you.) Some of these constants control the size of
 465 ** stack-allocated arrays used by the compiler or the interpreter, while
 466 ** others limit the maximum number of recursive calls that the compiler
 467 ** or the interpreter can perform. Values too large may cause a C stack
 468 ** overflow for some forms of deep constructs.
 469 ** ===================================================================
 470 */
 471
 472
 473 /*
 474 @@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and
 475 @* syntactical nested non-terminals in a program.
 476 */
 477 #define LUAI_MAXCCALLS          200
 478
 479
 480 /*
 481 @@ LUAI_MAXVARS is the maximum number of local variables per function
 482 @* (must be smaller than 250).
 483 */
 484 #define LUAI_MAXVARS            200
 485
 486
 487 /*
 488 @@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
 489 @* (must be smaller than 250).
 490 */
 491 #define LUAI_MAXUPVALUES        60
 492
 493
 494 /*
 495 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
 496 */
 497 #define LUAL_BUFFERSIZE         BUFSIZ
 498
 499 /* }================================================================== */
 500
 501
 502
 503
 504 /*
 505 ** {==================================================================
 506 @@ LUA_NUMBER is the type of numbers in Lua.
 507 ** CHANGE the following definitions only if you want to build Lua
 508 ** with a number type different from double. You may also need to
 509 ** change lua_number2int & lua_number2integer.
 510 ** ===================================================================
 511 */
 512
 513 #define LUA_NUMBER_DOUBLE
 514 #define LUA_NUMBER      double
 515
 516 /*
 517 @@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
 518 @* over a number.
 519 */
 520 #define LUAI_UACNUMBER  double
 521
 522
 523 /*
 524 @@ LUA_NUMBER_SCAN is the format for reading numbers.
 525 @@ LUA_NUMBER_FMT is the format for writing numbers.
 526 @@ lua_number2str converts a number to a string.
 527 @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
 528 @@ lua_str2number converts a string to a number.
 529 */
 530 #define LUA_NUMBER_SCAN         "%lf"
 531 #define LUA_NUMBER_FMT          "%.14g"
 532 #define lua_number2str(s,n)     sprintf((s), LUA_NUMBER_FMT, (n))
 533 #define LUAI_MAXNUMBER2STR      32 /* 16 digits, sign, point, and \0 */
 534 #define lua_str2number(s,p)     strtod((s), (p))
 535
 536
 537 /*
 538 @@ The luai_num* macros define the primitive operations over numbers.
 539 */
 540 #if defined(LUA_CORE)
 541 #include <math.h>
 542 #define luai_numadd(a,b)        ((a)+(b))
 543 #define luai_numsub(a,b)        ((a)-(b))
 544 #define luai_nummul(a,b)        ((a)*(b))
 545 #define luai_numdiv(a,b)        ((a)/(b))
 546 #define luai_nummod(a,b)        ((a) - floor((a)/(b))*(b))
 547 #define luai_numpow(a,b)        (pow(a,b))
 548 #define luai_numunm(a)          (-(a))
 549 #define luai_numeq(a,b)         ((a)==(b))
 550 #define luai_numlt(a,b)         ((a)<(b))
 551 #define luai_numle(a,b)         ((a)<=(b))
 552 #define luai_numisnan(a)        (!luai_numeq((a), (a)))
 553 #endif
 554
 555
 556 /*
 557 @@ lua_number2int is a macro to convert lua_Number to int.
 558 @@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
 559 ** CHANGE them if you know a faster way to convert a lua_Number to
 560 ** int (with any rounding method and without throwing errors) in your
 561 ** system. In Pentium machines, a naive typecast from double to int
 562 ** in C is extremely slow, so any alternative is worth trying.
 563 */
 564
 565 /* On a Pentium, resort to a trick */
 566 #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
 567     (defined(__i386) || defined (_M_IX86) || defined(__i386__))
 568
 569 /* On a Microsoft compiler, use assembler */
 570 #if defined(_MSC_VER)
 571
 572 #define lua_number2int(i,d)   __asm fld d   __asm fistp i
 573 #define lua_number2integer(i,n)         lua_number2int(i, n)
 574
 575 /* the next trick should work on any Pentium, but sometimes clashes
 576    with a DirectX idiosyncrasy */
 577 #else
 578
 579 union luai_Cast { double l_d; long l_l; };
 580 #define lua_number2int(i,d) \
 581   { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
 582 #define lua_number2integer(i,n)         lua_number2int(i, n)
 583
 584 #endif
 585
 586
 587 /* this option always works, but may be slow */
 588 #else
 589 #define lua_number2int(i,d)     ((i)=(int)(d))
 590 #define lua_number2integer(i,d) ((i)=(lua_Integer)(d))
 591
 592 #endif
 593
 594 /* }================================================================== */
 595
 596
 597 /*
 598 @@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
 599 ** CHANGE it if your system requires alignments larger than double. (For
 600 ** instance, if your system supports long doubles and they must be
 601 ** aligned in 16-byte boundaries, then you should add long double in the
 602 ** union.) Probably you do not need to change this.
 603 */
 604 #define LUAI_USER_ALIGNMENT_T   union { double u; void *s; long l; }
 605
 606
 607 /*
 608 @@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.
 609 ** CHANGE them if you prefer to use longjmp/setjmp even with C++
 610 ** or if want/don't to use _longjmp/_setjmp instead of regular
 611 ** longjmp/setjmp. By default, Lua handles errors with exceptions when
 612 ** compiling as C++ code, with _longjmp/_setjmp when asked to use them,
 613 ** and with longjmp/setjmp otherwise.
 614 */
 615 #if defined(__cplusplus)
 616 /* C++ exceptions */
 617 #define LUAI_THROW(L,c) throw(c)
 618 #define LUAI_TRY(L,c,a) try { a } catch(...) \
 619         { if ((c)->status == 0) (c)->status = -1; }
 620 #define luai_jmpbuf     int  /* dummy variable */
 621
 622 #elif defined(LUA_USE_ULONGJMP)
 623 /* in Unix, try _longjmp/_setjmp (more efficient) */
 624 #define LUAI_THROW(L,c) _longjmp((c)->b, 1)
 625 #define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }
 626 #define luai_jmpbuf     jmp_buf
 627
 628 #else
 629 /* default handling with long jumps */
 630 #define LUAI_THROW(L,c) longjmp((c)->b, 1)
 631 #define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }
 632 #define luai_jmpbuf     jmp_buf
 633
 634 #endif
 635
 636
 637 /*
 638 @@ LUA_MAXCAPTURES is the maximum number of captures that a pattern
 639 @* can do during pattern-matching.
 640 ** CHANGE it if you need more captures. This limit is arbitrary.
 641 */
 642 #define LUA_MAXCAPTURES         32
 643
 644
 645 /*
 646 @@ lua_tmpnam is the function that the OS library uses to create a
 647 @* temporary name.
 648 @@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam.
 649 ** CHANGE them if you have an alternative to tmpnam (which is considered
 650 ** insecure) or if you want the original tmpnam anyway.  By default, Lua
 651 ** uses tmpnam except when POSIX is available, where it uses mkstemp.
 652 */
 653 #if defined(loslib_c) || defined(luaall_c)
 654
 655 #if defined(LUA_USE_MKSTEMP)
 656 #include <unistd.h>
 657 #define LUA_TMPNAMBUFSIZE       32
 658 #define lua_tmpnam(b,e) { \
 659         strcpy(b, "/tmp/lua_XXXXXX"); \
 660         e = mkstemp(b); \
 661         if (e != -1) close(e); \
 662         e = (e == -1); }
 663
 664 #else
 665 #define LUA_TMPNAMBUFSIZE       L_tmpnam
 666 #define lua_tmpnam(b,e)         { e = (tmpnam(b) == NULL); }
 667 #endif
 668
 669 #endif
 670
 671
 672 /*
 673 @@ lua_popen spawns a new process connected to the current one through
 674 @* the file streams.
 675 ** CHANGE it if you have a way to implement it in your system.
 676 */
 677 #if defined(LUA_USE_POPEN)
 678
 679 #define lua_popen(L,c,m)        ((void)L, fflush(NULL), popen(c,m))
 680 #define lua_pclose(L,file)      ((void)L, (pclose(file) != -1))
 681
 682 #elif defined(LUA_WIN)
 683
 684 #define lua_popen(L,c,m)        ((void)L, _popen(c,m))
 685 #define lua_pclose(L,file)      ((void)L, (_pclose(file) != -1))
 686
 687 #else
 688
 689 #define lua_popen(L,c,m)        ((void)((void)c, m),  \
 690                 luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
 691 #define lua_pclose(L,file)              ((void)((void)L, file), 0)
 692
 693 #endif
 694
 695 /*
 696 @@ LUA_DL_* define which dynamic-library system Lua should use.
 697 ** CHANGE here if Lua has problems choosing the appropriate
 698 ** dynamic-library system for your platform (either Windows' DLL, Mac's
 699 ** dyld, or Unix's dlopen). If your system is some kind of Unix, there
 700 ** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for
 701 ** it.  To use dlopen you also need to adapt the src/Makefile (probably
 702 ** adding -ldl to the linker options), so Lua does not select it
 703 ** automatically.  (When you change the makefile to add -ldl, you must
 704 ** also add -DLUA_USE_DLOPEN.)
 705 ** If you do not want any kind of dynamic library, undefine all these
 706 ** options.
 707 ** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD.
 708 */
 709 #if defined(LUA_USE_DLOPEN)
 710 #define LUA_DL_DLOPEN
 711 #endif
 712
 713 #if defined(LUA_WIN)
 714 #define LUA_DL_DLL
 715 #endif
 716
 717
 718 /*
 719 @@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
 720 @* (the data goes just *before* the lua_State pointer).
 721 ** CHANGE (define) this if you really need that. This value must be
 722 ** a multiple of the maximum alignment required for your machine.
 723 */
 724 #define LUAI_EXTRASPACE         0
 725
 726
 727 /*
 728 @@ luai_userstate* allow user-specific actions on threads.
 729 ** CHANGE them if you defined LUAI_EXTRASPACE and need to do something
 730 ** extra when a thread is created/deleted/resumed/yielded.
 731 */
 732 #define luai_userstateopen(L)           ((void)L)
 733 #define luai_userstateclose(L)          ((void)L)
 734 #define luai_userstatethread(L,L1)      ((void)L)
 735 #define luai_userstatefree(L)           ((void)L)
 736 #define luai_userstateresume(L,n)       ((void)L)
 737 #define luai_userstateyield(L,n)        ((void)L)
 738
 739
 740 /*
 741 @@ LUA_INTFRMLEN is the length modifier for integer conversions
 742 @* in 'string.format'.
 743 @@ LUA_INTFRM_T is the integer type correspoding to the previous length
 744 @* modifier.
 745 ** CHANGE them if your system supports long long or does not support long.
 746 */
 747
 748 #if defined(LUA_USELONGLONG)
 749
 750 #define LUA_INTFRMLEN           "ll"
 751 #define LUA_INTFRM_T            long long
 752
 753 #else
 754
 755 #define LUA_INTFRMLEN           "l"
 756 #define LUA_INTFRM_T            long
 757
 758 #endif
 759
 760
 761
 762 /* =================================================================== */
 763
 764 /*
 765 ** Local configuration. You can use this space to add your redefinitions
 766 ** without modifying the main part of the file.
 767 */
 768
 769
 770
 771 #endif
 772