src/lua/luaconf.h

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