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 #if 0
  12 #include <limits.h>
  13 #include <stddef.h>
  14 #endif
  15
  16 #include "grub_lua.h"
  17
  18 /*
  19 ** ==================================================================
  20 ** Search for "@@" to find all configurable definitions.
  21 ** ===================================================================
  22 */
  23
  24
  25 /*
  26 @@ LUA_ANSI controls the use of non-ansi features.
  27 ** CHANGE it (define it) if you want Lua to avoid the use of any
  28 ** non-ansi feature or library.
  29 */
  30 #if defined(__STRICT_ANSI__)
  31 #define LUA_ANSI
  32 #endif
  33
  34
  35 #if !defined(LUA_ANSI) && defined(_WIN32)
  36 #define LUA_WIN
  37 #endif
  38
  39 #if defined(LUA_USE_LINUX)
  40 #define LUA_USE_POSIX
  41 #define LUA_USE_DLOPEN          /* needs an extra library: -ldl */
  42 #define LUA_USE_READLINE        /* needs some extra libraries */
  43 #endif
  44
  45 #if defined(LUA_USE_MACOSX)
  46 #define LUA_USE_POSIX
  47 #define LUA_DL_DYLD             /* does not need extra library */
  48 #endif
  49
  50
  51
  52 /*
  53 @@ LUA_USE_POSIX includes all functionallity listed as X/Open System
  54 @* Interfaces Extension (XSI).
  55 ** CHANGE it (define it) if your system is XSI compatible.
  56 */
  57 #if 0
  58 #if defined(LUA_USE_POSIX)
  59 #define LUA_USE_MKSTEMP
  60 #define LUA_USE_ISATTY
  61 #define LUA_USE_POPEN
  62 #define LUA_USE_ULONGJMP
  63 #endif
  64 #endif
  65
  66 /*
  67 @@ LUA_PATH and LUA_CPATH are the names of the environment variables that
  68 @* Lua check to set its paths.
  69 @@ LUA_INIT is the name of the environment variable that Lua
  70 @* checks for initialization code.
  71 ** CHANGE them if you want different names.
  72 */
  73 #define LUA_PATH        "LUA_PATH"
  74 #define LUA_CPATH       "LUA_CPATH"
  75 #define LUA_INIT        "LUA_INIT"
  76
  77
  78 /*
  79 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
  80 @* Lua libraries.
  81 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
  82 @* C libraries.
  83 ** CHANGE them if your machine has a non-conventional directory
  84 ** hierarchy or if you want to install your libraries in
  85 ** non-conventional directories.
  86 */
  87 #if defined(_WIN32)
  88 /*
  89 ** In Windows, any exclamation mark ('!') in the path is replaced by the
  90 ** path of the directory of the executable file of the current process.
  91 */
  92 #define LUA_LDIR        "!\\lua\\"
  93 #define LUA_CDIR        "!\\"
  94 #define LUA_PATH_DEFAULT  \
  95                 ".\\?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
  96                              LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua"
  97 #define LUA_CPATH_DEFAULT \
  98         ".\\?.dll;"  ".\\?51.dll;"  LUA_CDIR"?.dll;" LUA_CDIR"?51.dll;" LUA_CDIR"clibs\\?.dll;" LUA_CDIR"clibs\\?51.dll;" LUA_CDIR"loadall.dll;" LUA_CDIR"clibs\\loadall.dll"
  99
 100 #else
 101 #define LUA_ROOT        "/usr/local/"
 102 #define LUA_LDIR        LUA_ROOT "share/lua/5.1/"
 103 #define LUA_CDIR        LUA_ROOT "lib/lua/5.1/"
 104 #define LUA_PATH_DEFAULT  \
 105                 "./?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
 106                             LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua"
 107 #define LUA_CPATH_DEFAULT \
 108         "./?.so;"  "./lib?51.so;"  LUA_CDIR"?.so;" LUA_CDIR"lib?51.so;" LUA_CDIR"loadall.so"
 109 #endif
 110
 111
 112 /*
 113 @@ LUA_DIRSEP is the directory separator (for submodules).
 114 ** CHANGE it if your machine does not use "/" as the directory separator
 115 ** and is not Windows. (On Windows Lua automatically uses "\".)
 116 */
 117 #if defined(_WIN32)
 118 #define LUA_DIRSEP      "\\"
 119 #else
 120 #define LUA_DIRSEP      "/"
 121 #endif
 122
 123
 124 /*
 125 @@ LUA_PATHSEP is the character that separates templates in a path.
 126 @@ LUA_PATH_MARK is the string that marks the substitution points in a
 127 @* template.
 128 @@ LUA_EXECDIR in a Windows path is replaced by the executable's
 129 @* directory.
 130 @@ LUA_IGMARK is a mark to ignore all before it when bulding the
 131 @* luaopen_ function name.
 132 ** CHANGE them if for some reason your system cannot use those
 133 ** characters. (E.g., if one of those characters is a common character
 134 ** in file/directory names.) Probably you do not need to change them.
 135 */
 136 #define LUA_PATHSEP     ";"
 137 #define LUA_PATH_MARK   "?"
 138 #define LUA_EXECDIR     "!"
 139 #define LUA_IGMARK      "-"
 140
 141
 142 /*
 143 @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
 144 ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
 145 ** machines, ptrdiff_t gives a good choice between int or long.)
 146 */
 147 #define LUA_INTEGER     ptrdiff_t
 148
 149
 150 /*
 151 @@ LUA_API is a mark for all core API functions.
 152 @@ LUALIB_API is a mark for all standard library functions.
 153 ** CHANGE them if you need to define those functions in some special way.
 154 ** For instance, if you want to create one Windows DLL with the core and
 155 ** the libraries, you may want to use the following definition (define
 156 ** LUA_BUILD_AS_DLL to get it).
 157 */
 158 #if defined(LUA_BUILD_AS_DLL)
 159
 160 #if defined(LUA_CORE) || defined(LUA_LIB)
 161 #define LUA_API __declspec(dllexport)
 162 #else
 163 #define LUA_API __declspec(dllimport)
 164 #endif
 165
 166 #else
 167
 168 #define LUA_API         extern
 169
 170 #endif
 171
 172 /* more often than not the libs go together with the core */
 173 #define LUALIB_API      LUA_API
 174
 175
 176 /*
 177 @@ LUAI_FUNC is a mark for all extern functions that are not to be
 178 @* exported to outside modules.
 179 @@ LUAI_DATA is a mark for all extern (const) variables that are not to
 180 @* be exported to outside modules.
 181 ** CHANGE them if you need to mark them in some special way. Elf/gcc
 182 ** (versions 3.2 and later) mark them as "hidden" to optimize access
 183 ** when Lua is compiled as a shared library.
 184 */
 185 #if defined(luaall_c)
 186 #define LUAI_FUNC       static
 187 #define LUAI_DATA       /* empty */
 188
 189 #elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
 190       defined(__ELF__)
 191 #define LUAI_FUNC       __attribute__((visibility("hidden"))) extern
 192 #define LUAI_DATA       LUAI_FUNC
 193
 194 #else
 195 #define LUAI_FUNC       extern
 196 #define LUAI_DATA       extern
 197 #endif
 198
 199
 200
 201 /*
 202 @@ LUA_QL describes how error messages quote program elements.
 203 ** CHANGE it if you want a different appearance.
 204 */
 205 #define LUA_QL(x)       "'" x "'"
 206 #define LUA_QS          LUA_QL("%s")
 207
 208
 209 /*
 210 @@ LUA_IDSIZE gives the maximum size for the description of the source
 211 @* of a function in debug information.
 212 ** CHANGE it if you want a different size.
 213 */
 214 #define LUA_IDSIZE      60
 215
 216
 217 /*
 218 ** {==================================================================
 219 ** Stand-alone configuration
 220 ** ===================================================================
 221 */
 222
 223 #if defined(lua_c) || defined(luaall_c)
 224
 225 /*
 226 @@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that
 227 @* is, whether we're running lua interactively).
 228 ** CHANGE it if you have a better definition for non-POSIX/non-Windows
 229 ** systems.
 230 */
 231 #if defined(LUA_USE_ISATTY)
 232 #include <unistd.h>
 233 #define lua_stdin_is_tty()      isatty(0)
 234 #elif defined(LUA_WIN)
 235 #include <io.h>
 236 #include <stdio.h>
 237 #define lua_stdin_is_tty()      _isatty(_fileno(stdin))
 238 #else
 239 #define lua_stdin_is_tty()      1  /* assume stdin is a tty */
 240 #endif
 241
 242
 243 /*
 244 @@ LUA_PROMPT is the default prompt used by stand-alone Lua.
 245 @@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua.
 246 ** CHANGE them if you want different prompts. (You can also change the
 247 ** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)
 248 */
 249 #define LUA_PROMPT              "> "
 250 #define LUA_PROMPT2             ">> "
 251
 252
 253 /*
 254 @@ LUA_PROGNAME is the default name for the stand-alone Lua program.
 255 ** CHANGE it if your stand-alone interpreter has a different name and
 256 ** your system is not able to detect that name automatically.
 257 */
 258 #define LUA_PROGNAME            "lua"
 259
 260
 261 /*
 262 @@ LUA_MAXINPUT is the maximum length for an input line in the
 263 @* stand-alone interpreter.
 264 ** CHANGE it if you need longer lines.
 265 */
 266 #define LUA_MAXINPUT    512
 267
 268
 269 /*
 270 @@ lua_readline defines how to show a prompt and then read a line from
 271 @* the standard input.
 272 @@ lua_saveline defines how to "save" a read line in a "history".
 273 @@ lua_freeline defines how to free a line read by lua_readline.
 274 ** CHANGE them if you want to improve this functionality (e.g., by using
 275 ** GNU readline and history facilities).
 276 */
 277 #if defined(LUA_USE_READLINE)
 278 #include <stdio.h>
 279 #include <readline/readline.h>
 280 #include <readline/history.h>
 281 #define lua_readline(L,b,p)     ((void)L, ((b)=readline(p)) != NULL)
 282 #define lua_saveline(L,idx) \
 283         if (lua_strlen(L,idx) > 0)  /* non-empty line? */ \
 284           add_history(lua_tostring(L, idx));  /* add it to history */
 285 #define lua_freeline(L,b)       ((void)L, free(b))
 286 #else
 287 #define lua_readline(L,b,p)     \
 288         ((void)L, fputs(p, stdout), fflush(stdout),  /* show prompt */ \
 289         fgets(b, LUA_MAXINPUT, stdin) != NULL)  /* get line */
 290 #define lua_saveline(L,idx)     { (void)L; (void)idx; }
 291 #define lua_freeline(L,b)       { (void)L; (void)b; }
 292 #endif
 293
 294 #endif
 295
 296 /* }================================================================== */
 297
 298
 299 /*
 300 @@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles
 301 @* as a percentage.
 302 ** CHANGE it if you want the GC to run faster or slower (higher values
 303 ** mean larger pauses which mean slower collection.) You can also change
 304 ** this value dynamically.
 305 */
 306 #define LUAI_GCPAUSE    200  /* 200% (wait memory to double before next GC) */
 307
 308
 309 /*
 310 @@ LUAI_GCMUL defines the default speed of garbage collection relative to
 311 @* memory allocation as a percentage.
 312 ** CHANGE it if you want to change the granularity of the garbage
 313 ** collection. (Higher values mean coarser collections. 0 represents
 314 ** infinity, where each step performs a full collection.) You can also
 315 ** change this value dynamically.
 316 */
 317 #define LUAI_GCMUL      200 /* GC runs 'twice the speed' of memory allocation */
 318
 319
 320
 321 /*
 322 @@ LUA_COMPAT_GETN controls compatibility with old getn behavior.
 323 ** CHANGE it (define it) if you want exact compatibility with the
 324 ** behavior of setn/getn in Lua 5.0.
 325 */
 326 #undef LUA_COMPAT_GETN
 327
 328 /*
 329 @@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib.
 330 ** CHANGE it to undefined as soon as you do not need a global 'loadlib'
 331 ** function (the function is still available as 'package.loadlib').
 332 */
 333 #undef LUA_COMPAT_LOADLIB
 334
 335 /*
 336 @@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.
 337 ** CHANGE it to undefined as soon as your programs use only '...' to
 338 ** access vararg parameters (instead of the old 'arg' table).
 339 */
 340 #define LUA_COMPAT_VARARG
 341
 342 /*
 343 @@ LUA_COMPAT_MOD controls compatibility with old math.mod function.
 344 ** CHANGE it to undefined as soon as your programs use 'math.fmod' or
 345 ** the new '%' operator instead of 'math.mod'.
 346 */
 347 #define LUA_COMPAT_MOD
 348
 349 /*
 350 @@ LUA_COMPAT_LSTR controls compatibility with old long string nesting
 351 @* facility.
 352 ** CHANGE it to 2 if you want the old behaviour, or undefine it to turn
 353 ** off the advisory error when nesting [[...]].
 354 */
 355 #define LUA_COMPAT_LSTR         1
 356
 357 /*
 358 @@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.
 359 ** CHANGE it to undefined as soon as you rename 'string.gfind' to
 360 ** 'string.gmatch'.
 361 */
 362 #define LUA_COMPAT_GFIND
 363
 364 /*
 365 @@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib'
 366 @* behavior.
 367 ** CHANGE it to undefined as soon as you replace to 'luaL_register'
 368 ** your uses of 'luaL_openlib'
 369 */
 370 #define LUA_COMPAT_OPENLIB
 371
 372
 373
 374 /*
 375 @@ luai_apicheck is the assert macro used by the Lua-C API.
 376 ** CHANGE luai_apicheck if you want Lua to perform some checks in the
 377 ** parameters it gets from API calls. This may slow down the interpreter
 378 ** a bit, but may be quite useful when debugging C code that interfaces
 379 ** with Lua. A useful redefinition is to use assert.h.
 380 */
 381 #if defined(LUA_USE_APICHECK)
 382 #include <assert.h>
 383 #define luai_apicheck(L,o)      { (void)L; assert(o); }
 384 #else
 385 #define luai_apicheck(L,o)      { (void)L; }
 386 #endif
 387
 388
 389 /*
 390 @@ LUAI_BITSINT defines the number of bits in an int.
 391 ** CHANGE here if Lua cannot automatically detect the number of bits of
 392 ** your machine. Probably you do not need to change this.
 393 */
 394 /* avoid overflows in comparison */
 395 #if INT_MAX-20 < 32760
 396 #define LUAI_BITSINT    16
 397 #elif INT_MAX > 2147483640L
 398 /* int has at least 32 bits */
 399 #define LUAI_BITSINT    32
 400 #else
 401 #error "you must define LUA_BITSINT with number of bits in an integer"
 402 #endif
 403
 404
 405 /*
 406 @@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
 407 @@ LUAI_INT32 is an signed integer with at least 32 bits.
 408 @@ LUAI_UMEM is an unsigned integer big enough to count the total
 409 @* memory used by Lua.
 410 @@ LUAI_MEM is a signed integer big enough to count the total memory
 411 @* used by Lua.
 412 ** CHANGE here if for some weird reason the default definitions are not
 413 ** good enough for your machine. (The definitions in the 'else'
 414 ** part always works, but may waste space on machines with 64-bit
 415 ** longs.) Probably you do not need to change this.
 416 */
 417 #if LUAI_BITSINT >= 32
 418 #define LUAI_UINT32     unsigned int
 419 #define LUAI_INT32      int
 420 #define LUAI_MAXINT32   INT_MAX
 421 #define LUAI_UMEM       size_t
 422 #define LUAI_MEM        ptrdiff_t
 423 #else
 424 /* 16-bit ints */
 425 #define LUAI_UINT32     unsigned long
 426 #define LUAI_INT32      long
 427 #define LUAI_MAXINT32   LONG_MAX
 428 #define LUAI_UMEM       unsigned long
 429 #define LUAI_MEM        long
 430 #endif
 431
 432
 433 /*
 434 @@ LUAI_MAXCALLS limits the number of nested calls.
 435 ** CHANGE it if you need really deep recursive calls. This limit is
 436 ** arbitrary; its only purpose is to stop infinite recursion before
 437 ** exhausting memory.
 438 */
 439 #define LUAI_MAXCALLS   20000
 440
 441
 442 /*
 443 @@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
 444 @* can use.
 445 ** CHANGE it if you need lots of (Lua) stack space for your C
 446 ** functions. This limit is arbitrary; its only purpose is to stop C
 447 ** functions to consume unlimited stack space. (must be smaller than
 448 ** -LUA_REGISTRYINDEX)
 449 */
 450 #define LUAI_MAXCSTACK  8000
 451
 452
 453
 454 /*
 455 ** {==================================================================
 456 ** CHANGE (to smaller values) the following definitions if your system
 457 ** has a small C stack. (Or you may want to change them to larger
 458 ** values if your system has a large C stack and these limits are
 459 ** too rigid for you.) Some of these constants control the size of
 460 ** stack-allocated arrays used by the compiler or the interpreter, while
 461 ** others limit the maximum number of recursive calls that the compiler
 462 ** or the interpreter can perform. Values too large may cause a C stack
 463 ** overflow for some forms of deep constructs.
 464 ** ===================================================================
 465 */
 466
 467
 468 /*
 469 @@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and
 470 @* syntactical nested non-terminals in a program.
 471 */
 472 #define LUAI_MAXCCALLS          200
 473
 474
 475 /*
 476 @@ LUAI_MAXVARS is the maximum number of local variables per function
 477 @* (must be smaller than 250).
 478 */
 479 #define LUAI_MAXVARS            200
 480
 481
 482 /*
 483 @@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
 484 @* (must be smaller than 250).
 485 */
 486 #define LUAI_MAXUPVALUES        60
 487
 488
 489 /*
 490 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
 491 */
 492 #if 0
 493 #define LUAL_BUFFERSIZE         BUFSIZ
 494 #else
 495 #define LUAL_BUFFERSIZE         512
 496 #endif
 497
 498 /* }================================================================== */
 499
 500
 501
 502
 503 /*
 504 ** {==================================================================
 505 @@ LUA_NUMBER is the type of numbers in Lua.
 506 ** CHANGE the following definitions only if you want to build Lua
 507 ** with a number type different from double. You may also need to
 508 ** change lua_number2int & lua_number2integer.
 509 ** ===================================================================
 510 */
 511
 512 #if 0
 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 #else
 522
 523 #define LUA_NUMBER      int
 524 #define LUAI_UACNUMBER  int
 525
 526 #endif
 527
 528 /*
 529 @@ LUA_NUMBER_SCAN is the format for reading numbers.
 530 @@ LUA_NUMBER_FMT is the format for writing numbers.
 531 @@ lua_number2str converts a number to a string.
 532 @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
 533 @@ lua_str2number converts a string to a number.
 534 */
 535 #if 0
 536 #define LUA_NUMBER_SCAN         "%lf"
 537 #define LUA_NUMBER_FMT          "%.14g"
 538 #else
 539 #define LUA_NUMBER_SCAN         "%d"
 540 #define LUA_NUMBER_FMT          "%d"
 541 #endif
 542 #define lua_number2str(s,n)     sprintf((s), LUA_NUMBER_FMT, (n))
 543 #define LUAI_MAXNUMBER2STR      32 /* 16 digits, sign, point, and \0 */
 544 #define lua_str2number(s,p)     strtod((s), (p))
 545
 546
 547 /*
 548 @@ The luai_num* macros define the primitive operations over numbers.
 549 */
 550 #if defined(LUA_CORE)
 551 #if 0
 552 #include <math.h>
 553 #endif
 554 #define luai_numadd(a,b)        ((a)+(b))
 555 #define luai_numsub(a,b)        ((a)-(b))
 556 #define luai_nummul(a,b)        ((a)*(b))
 557 #define luai_numdiv(a,b)        ((a)/(b))
 558 #if 0
 559 #define luai_nummod(a,b)        ((a) - floor((a)/(b))*(b))
 560 #define luai_numpow(a,b)        (pow(a,b))
 561 #else
 562
 563 #define luai_nummod(a,b)        ((a) % (b))
 564
 565 static inline LUA_NUMBER
 566 luai_numpow (LUA_NUMBER a, LUA_NUMBER b)
 567 {
 568   LUA_NUMBER c;
 569
 570   c = 1;
 571   while (b > 0)
 572     {
 573       c *= a;
 574       b--;
 575     }
 576
 577   return c;
 578 }
 579
 580 #endif
 581 #define luai_numunm(a)          (-(a))
 582 #define luai_numeq(a,b)         ((a)==(b))
 583 #define luai_numlt(a,b)         ((a)<(b))
 584 #define luai_numle(a,b)         ((a)<=(b))
 585 #define luai_numisnan(a)        (!luai_numeq((a), (a)))
 586 #endif
 587
 588
 589 /*
 590 @@ lua_number2int is a macro to convert lua_Number to int.
 591 @@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
 592 ** CHANGE them if you know a faster way to convert a lua_Number to
 593 ** int (with any rounding method and without throwing errors) in your
 594 ** system. In Pentium machines, a naive typecast from double to int
 595 ** in C is extremely slow, so any alternative is worth trying.
 596 */
 597
 598 #if 0
 599 /* On a Pentium, resort to a trick */
 600 #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
 601     (defined(__i386) || defined (_M_IX86) || defined(__i386__))
 602
 603 /* On a Microsoft compiler, use assembler */
 604 #if defined(_MSC_VER)
 605
 606 #define lua_number2int(i,d)   __asm fld d   __asm fistp i
 607 #define lua_number2integer(i,n)         lua_number2int(i, n)
 608
 609 /* the next trick should work on any Pentium, but sometimes clashes
 610    with a DirectX idiosyncrasy */
 611 #else
 612
 613 union luai_Cast { double l_d; long l_l; };
 614 #define lua_number2int(i,d) \
 615   { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
 616 #define lua_number2integer(i,n)         lua_number2int(i, n)
 617
 618 #endif
 619
 620
 621 /* this option always works, but may be slow */
 622 #else
 623 #define lua_number2int(i,d)     ((i)=(int)(d))
 624 #define lua_number2integer(i,d) ((i)=(lua_Integer)(d))
 625
 626 #endif
 627
 628 #else
 629 #define lua_number2int(i,d)     ((i)=(int)(d))
 630 #define lua_number2integer(i,d) ((i)=(lua_Integer)(d))
 631 #endif
 632
 633 /* }================================================================== */
 634
 635
 636 /*
 637 @@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
 638 ** CHANGE it if your system requires alignments larger than double. (For
 639 ** instance, if your system supports long doubles and they must be
 640 ** aligned in 16-byte boundaries, then you should add long double in the
 641 ** union.) Probably you do not need to change this.
 642 */
 643 #define LUAI_USER_ALIGNMENT_T   union { double u; void *s; long l; }
 644
 645
 646 /*
 647 @@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.
 648 ** CHANGE them if you prefer to use longjmp/setjmp even with C++
 649 ** or if want/don't to use _longjmp/_setjmp instead of regular
 650 ** longjmp/setjmp. By default, Lua handles errors with exceptions when
 651 ** compiling as C++ code, with _longjmp/_setjmp when asked to use them,
 652 ** and with longjmp/setjmp otherwise.
 653 */
 654 #if defined(__cplusplus)
 655 /* C++ exceptions */
 656 #define LUAI_THROW(L,c) throw(c)
 657 #define LUAI_TRY(L,c,a) try { a } catch(...) \
 658         { if ((c)->status == 0) (c)->status = -1; }
 659 #define luai_jmpbuf     int  /* dummy variable */
 660
 661 #elif defined(LUA_USE_ULONGJMP)
 662 /* in Unix, try _longjmp/_setjmp (more efficient) */
 663 #define LUAI_THROW(L,c) _longjmp((c)->b, 1)
 664 #define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }
 665 #define luai_jmpbuf     jmp_buf
 666
 667 #else
 668 /* default handling with long jumps */
 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 #endif
 674
 675
 676 /*
 677 @@ LUA_MAXCAPTURES is the maximum number of captures that a pattern
 678 @* can do during pattern-matching.
 679 ** CHANGE it if you need more captures. This limit is arbitrary.
 680 */
 681 #define LUA_MAXCAPTURES         32
 682
 683
 684 /*
 685 @@ lua_tmpnam is the function that the OS library uses to create a
 686 @* temporary name.
 687 @@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam.
 688 ** CHANGE them if you have an alternative to tmpnam (which is considered
 689 ** insecure) or if you want the original tmpnam anyway.  By default, Lua
 690 ** uses tmpnam except when POSIX is available, where it uses mkstemp.
 691 */
 692 #if defined(loslib_c) || defined(luaall_c)
 693
 694 #if defined(LUA_USE_MKSTEMP)
 695 #include <unistd.h>
 696 #define LUA_TMPNAMBUFSIZE       32
 697 #define lua_tmpnam(b,e) { \
 698         strcpy(b, "/tmp/lua_XXXXXX"); \
 699         e = mkstemp(b); \
 700         if (e != -1) close(e); \
 701         e = (e == -1); }
 702
 703 #else
 704 #define LUA_TMPNAMBUFSIZE       L_tmpnam
 705 #define lua_tmpnam(b,e)         { e = (tmpnam(b) == NULL); }
 706 #endif
 707
 708 #endif
 709
 710
 711 /*
 712 @@ lua_popen spawns a new process connected to the current one through
 713 @* the file streams.
 714 ** CHANGE it if you have a way to implement it in your system.
 715 */
 716 #if defined(LUA_USE_POPEN)
 717
 718 #define lua_popen(L,c,m)        ((void)L, fflush(NULL), popen(c,m))
 719 #define lua_pclose(L,file)      ((void)L, (pclose(file) != -1))
 720
 721 #elif defined(LUA_WIN)
 722
 723 #define lua_popen(L,c,m)        ((void)L, _popen(c,m))
 724 #define lua_pclose(L,file)      ((void)L, (_pclose(file) != -1))
 725
 726 #else
 727
 728 #define lua_popen(L,c,m)        ((void)((void)c, m),  \
 729                 luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
 730 #define lua_pclose(L,file)              ((void)((void)L, file), 0)
 731
 732 #endif
 733
 734 /*
 735 @@ LUA_DL_* define which dynamic-library system Lua should use.
 736 ** CHANGE here if Lua has problems choosing the appropriate
 737 ** dynamic-library system for your platform (either Windows' DLL, Mac's
 738 ** dyld, or Unix's dlopen). If your system is some kind of Unix, there
 739 ** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for
 740 ** it.  To use dlopen you also need to adapt the src/Makefile (probably
 741 ** adding -ldl to the linker options), so Lua does not select it
 742 ** automatically.  (When you change the makefile to add -ldl, you must
 743 ** also add -DLUA_USE_DLOPEN.)
 744 ** If you do not want any kind of dynamic library, undefine all these
 745 ** options.
 746 ** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD.
 747 */
 748 #if 0
 749 #if defined(LUA_USE_DLOPEN)
 750 #define LUA_DL_DLOPEN
 751 #endif
 752
 753 #if defined(LUA_WIN)
 754 #define LUA_DL_DLL
 755 #endif
 756 #endif
 757
 758 /*
 759 @@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
 760 @* (the data goes just *before* the lua_State pointer).
 761 ** CHANGE (define) this if you really need that. This value must be
 762 ** a multiple of the maximum alignment required for your machine.
 763 */
 764 #define LUAI_EXTRASPACE         0
 765
 766
 767 /*
 768 @@ luai_userstate* allow user-specific actions on threads.
 769 ** CHANGE them if you defined LUAI_EXTRASPACE and need to do something
 770 ** extra when a thread is created/deleted/resumed/yielded.
 771 */
 772 #define luai_userstateopen(L)           ((void)L)
 773 #define luai_userstateclose(L)          ((void)L)
 774 #define luai_userstatethread(L,L1)      ((void)L)
 775 #define luai_userstatefree(L)           ((void)L)
 776 #define luai_userstateresume(L,n)       ((void)L)
 777 #define luai_userstateyield(L,n)        ((void)L)
 778
 779
 780 /*
 781 @@ LUA_INTFRMLEN is the length modifier for integer conversions
 782 @* in 'string.format'.
 783 @@ LUA_INTFRM_T is the integer type correspoding to the previous length
 784 @* modifier.
 785 ** CHANGE them if your system supports long long or does not support long.
 786 */
 787
 788 #if defined(LUA_USELONGLONG)
 789
 790 #define LUA_INTFRMLEN           "ll"
 791 #define LUA_INTFRM_T            long long
 792
 793 #else
 794
 795 #define LUA_INTFRMLEN           "l"
 796 #define LUA_INTFRM_T            long
 797
 798 #endif
 799
 800
 801
 802 /* =================================================================== */
 803
 804 /*
 805 ** Local configuration. You can use this space to add your redefinitions
 806 ** without modifying the main part of the file.
 807 */
 808
 809
 810
 811 #endif