dependencies/lua-5.3/src/luaconf.h

   1 /*
   2 ** $Id: luaconf.h,v 1.259 2016/12/22 13:08:50 roberto Exp $
   3 ** Configuration file for Lua
   4 ** See Copyright Notice in lua.h
   5 */
   6
   7
   8 #ifndef luaconf_h
   9 #define luaconf_h
  10
  11 #include <limits.h>
  12 #include <stddef.h>
  13
  14 #include "localluaconf.h"
  15
  16 /*
  17 ** ===================================================================
  18 ** Search for "@@" to find all configurable definitions.
  19 ** ===================================================================
  20 */
  21
  22
  23 /*
  24 ** {====================================================================
  25 ** System Configuration: macros to adapt (if needed) Lua to some
  26 ** particular platform, for instance compiling it with 32-bit numbers or
  27 ** restricting it to C89.
  28 ** =====================================================================
  29 */
  30
  31 /*
  32 @@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats. You
  33 ** can also define LUA_32BITS in the make file, but changing here you
  34 ** ensure that all software connected to Lua will be compiled with the
  35 ** same configuration.
  36 */
  37 /* #define LUA_32BITS */
  38
  39
  40 /*
  41 @@ LUA_USE_C89 controls the use of non-ISO-C89 features.
  42 ** Define it if you want Lua to avoid the use of a few C99 features
  43 ** or Windows-specific features on Windows.
  44 */
  45 /* #define LUA_USE_C89 */
  46
  47
  48 /*
  49 ** By default, Lua on Windows use (some) specific Windows features
  50 */
  51 #if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE)
  52 #define LUA_USE_WINDOWS  /* enable goodies for regular Windows */
  53 #endif
  54
  55
  56 #if defined(LUA_USE_WINDOWS)
  57 #define LUA_DL_DLL      /* enable support for DLL */
  58 #define LUA_USE_C89     /* broadly, Windows is C89 */
  59 #endif
  60
  61
  62 #if defined(LUA_USE_LINUX)
  63 #define LUA_USE_POSIX
  64 #define LUA_USE_DLOPEN          /* needs an extra library: -ldl */
  65 #endif
  66
  67
  68 #if defined(LUA_USE_MACOSX)
  69 #define LUA_USE_POSIX
  70 #define LUA_USE_DLOPEN          /* MacOS does not need -ldl */
  71 #endif
  72
  73
  74 /*
  75 @@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for
  76 ** C89 ('long' and 'double'); Windows always has '__int64', so it does
  77 ** not need to use this case.
  78 */
  79 #if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS)
  80 #define LUA_C89_NUMBERS
  81 #endif
  82
  83
  84
  85 /*
  86 @@ LUAI_BITSINT defines the (minimum) number of bits in an 'int'.
  87 */
  88 /* avoid undefined shifts */
  89 #if ((INT_MAX >> 15) >> 15) >= 1
  90 #define LUAI_BITSINT    32
  91 #else
  92 /* 'int' always must have at least 16 bits */
  93 #define LUAI_BITSINT    16
  94 #endif
  95
  96
  97 /*
  98 @@ LUA_INT_TYPE defines the type for Lua integers.
  99 @@ LUA_FLOAT_TYPE defines the type for Lua floats.
 100 ** Lua should work fine with any mix of these options (if supported
 101 ** by your C compiler). The usual configurations are 64-bit integers
 102 ** and 'double' (the default), 32-bit integers and 'float' (for
 103 ** restricted platforms), and 'long'/'double' (for C compilers not
 104 ** compliant with C99, which may not have support for 'long long').
 105 */
 106
 107 /* predefined options for LUA_INT_TYPE */
 108 #define LUA_INT_INT             1
 109 #define LUA_INT_LONG            2
 110 #define LUA_INT_LONGLONG        3
 111
 112 /* predefined options for LUA_FLOAT_TYPE */
 113 #define LUA_FLOAT_FLOAT         1
 114 #define LUA_FLOAT_DOUBLE        2
 115 #define LUA_FLOAT_LONGDOUBLE    3
 116
 117 #if defined(LUA_32BITS)         /* { */
 118 /*
 119 ** 32-bit integers and 'float'
 120 */
 121 #if LUAI_BITSINT >= 32  /* use 'int' if big enough */
 122 #define LUA_INT_TYPE    LUA_INT_INT
 123 #else  /* otherwise use 'long' */
 124 #define LUA_INT_TYPE    LUA_INT_LONG
 125 #endif
 126 #define LUA_FLOAT_TYPE  LUA_FLOAT_FLOAT
 127
 128 #elif defined(LUA_C89_NUMBERS)  /* }{ */
 129 /*
 130 ** largest types available for C89 ('long' and 'double')
 131 */
 132 #define LUA_INT_TYPE    LUA_INT_LONG
 133 #define LUA_FLOAT_TYPE  LUA_FLOAT_DOUBLE
 134
 135 #endif                          /* } */
 136
 137
 138 /*
 139 ** default configuration for 64-bit Lua ('long long' and 'double')
 140 */
 141 #if !defined(LUA_INT_TYPE)
 142 #define LUA_INT_TYPE    LUA_INT_LONGLONG
 143 #endif
 144
 145 #if !defined(LUA_FLOAT_TYPE)
 146 #define LUA_FLOAT_TYPE  LUA_FLOAT_DOUBLE
 147 #endif
 148
 149 /* }================================================================== */
 150
 151
 152
 153
 154 /*
 155 ** {==================================================================
 156 ** Configuration for Paths.
 157 ** ===================================================================
 158 */
 159
 160 /*
 161 ** LUA_PATH_SEP is the character that separates templates in a path.
 162 ** LUA_PATH_MARK is the string that marks the substitution points in a
 163 ** template.
 164 ** LUA_EXEC_DIR in a Windows path is replaced by the executable's
 165 ** directory.
 166 */
 167 #define LUA_PATH_SEP            ";"
 168 #define LUA_PATH_MARK           "?"
 169 #define LUA_EXEC_DIR            "!"
 170
 171
 172 /*
 173 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
 174 ** Lua libraries.
 175 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
 176 ** C libraries.
 177 ** CHANGE them if your machine has a non-conventional directory
 178 ** hierarchy or if you want to install your libraries in
 179 ** non-conventional directories.
 180 */
 181 #define LUA_VDIR        LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
 182 #if defined(_WIN32)     /* { */
 183 /*
 184 ** In Windows, any exclamation mark ('!') in the path is replaced by the
 185 ** path of the directory of the executable file of the current process.
 186 */
 187 #define LUA_LDIR        "!\\lua\\"
 188 #define LUA_CDIR        "!\\"
 189 #define LUA_SHRDIR      "!\\..\\share\\lua\\" LUA_VDIR "\\"
 190 #define LUA_PATH_DEFAULT  \
 191                 LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
 192                 LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua;" \
 193                 LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \
 194                 ".\\?.lua;" ".\\?\\init.lua"
 195 #define LUA_CPATH_DEFAULT \
 196                 LUA_CDIR"?.dll;" \
 197                 LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \
 198                 LUA_CDIR"loadall.dll;" ".\\?.dll"
 199
 200 #else                   /* }{ */
 201
 202 #define LUA_ROOT        "/usr/local/"
 203 #define LUA_LDIR        LUA_ROOT "share/lua/" LUA_VDIR "/"
 204 #define LUA_CDIR        LUA_ROOT "lib/lua/" LUA_VDIR "/"
 205 #define LUA_PATH_DEFAULT  \
 206                 LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
 207                 LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua;" \
 208                 "./?.lua;" "./?/init.lua"
 209 #define LUA_CPATH_DEFAULT \
 210                 LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
 211 #endif                  /* } */
 212
 213
 214 /*
 215 @@ LUA_DIRSEP is the directory separator (for submodules).
 216 ** CHANGE it if your machine does not use "/" as the directory separator
 217 ** and is not Windows. (On Windows Lua automatically uses "\".)
 218 */
 219 #if defined(_WIN32)
 220 #define LUA_DIRSEP      "\\"
 221 #else
 222 #define LUA_DIRSEP      "/"
 223 #endif
 224
 225 /* }================================================================== */
 226
 227
 228 /*
 229 ** {==================================================================
 230 ** Marks for exported symbols in the C code
 231 ** ===================================================================
 232 */
 233
 234 /*
 235 @@ LUA_API is a mark for all core API functions.
 236 @@ LUALIB_API is a mark for all auxiliary library functions.
 237 @@ LUAMOD_API is a mark for all standard library opening functions.
 238 ** CHANGE them if you need to define those functions in some special way.
 239 ** For instance, if you want to create one Windows DLL with the core and
 240 ** the libraries, you may want to use the following definition (define
 241 ** LUA_BUILD_AS_DLL to get it).
 242 */
 243 #if defined(LUA_BUILD_AS_DLL)   /* { */
 244
 245 #if defined(LUA_CORE) || defined(LUA_LIB)       /* { */
 246 #define LUA_API __declspec(dllexport)
 247 #else                                           /* }{ */
 248 #define LUA_API __declspec(dllimport)
 249 #endif                                          /* } */
 250
 251 #else                           /* }{ */
 252
 253 #define LUA_API         extern
 254
 255 #endif                          /* } */
 256
 257
 258 /* more often than not the libs go together with the core */
 259 #define LUALIB_API      LUA_API
 260 #define LUAMOD_API      LUALIB_API
 261
 262
 263 /*
 264 @@ LUAI_FUNC is a mark for all extern functions that are not to be
 265 ** exported to outside modules.
 266 @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables
 267 ** that are not to be exported to outside modules (LUAI_DDEF for
 268 ** definitions and LUAI_DDEC for declarations).
 269 ** CHANGE them if you need to mark them in some special way. Elf/gcc
 270 ** (versions 3.2 and later) mark them as "hidden" to optimize access
 271 ** when Lua is compiled as a shared library. Not all elf targets support
 272 ** this attribute. Unfortunately, gcc does not offer a way to check
 273 ** whether the target offers that support, and those without support
 274 ** give a warning about it. To avoid these warnings, change to the
 275 ** default definition.
 276 */
 277 #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
 278     defined(__ELF__)            /* { */
 279 #define LUAI_FUNC       __attribute__((visibility("hidden"))) extern
 280 #else                           /* }{ */
 281 #define LUAI_FUNC       extern
 282 #endif                          /* } */
 283
 284 #define LUAI_DDEC       LUAI_FUNC
 285 #define LUAI_DDEF       /* empty */
 286
 287 /* }================================================================== */
 288
 289
 290 /*
 291 ** {==================================================================
 292 ** Compatibility with previous versions
 293 ** ===================================================================
 294 */
 295
 296 /*
 297 @@ LUA_COMPAT_5_2 controls other macros for compatibility with Lua 5.2.
 298 @@ LUA_COMPAT_5_1 controls other macros for compatibility with Lua 5.1.
 299 ** You can define it to get all options, or change specific options
 300 ** to fit your specific needs.
 301 */
 302 #if defined(LUA_COMPAT_5_2)     /* { */
 303
 304 /*
 305 @@ LUA_COMPAT_MATHLIB controls the presence of several deprecated
 306 ** functions in the mathematical library.
 307 */
 308 #define LUA_COMPAT_MATHLIB
 309
 310 /*
 311 @@ LUA_COMPAT_BITLIB controls the presence of library 'bit32'.
 312 */
 313 #define LUA_COMPAT_BITLIB
 314
 315 /*
 316 @@ LUA_COMPAT_IPAIRS controls the effectiveness of the __ipairs metamethod.
 317 */
 318 #define LUA_COMPAT_IPAIRS
 319
 320 /*
 321 @@ LUA_COMPAT_APIINTCASTS controls the presence of macros for
 322 ** manipulating other integer types (lua_pushunsigned, lua_tounsigned,
 323 ** luaL_checkint, luaL_checklong, etc.)
 324 */
 325 #define LUA_COMPAT_APIINTCASTS
 326
 327 #endif                          /* } */
 328
 329
 330 #if defined(LUA_COMPAT_5_1)     /* { */
 331
 332 /* Incompatibilities from 5.2 -> 5.3 */
 333 #define LUA_COMPAT_MATHLIB
 334 #define LUA_COMPAT_APIINTCASTS
 335
 336 /*
 337 @@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'.
 338 ** You can replace it with 'table.unpack'.
 339 */
 340 #define LUA_COMPAT_UNPACK
 341
 342 /*
 343 @@ LUA_COMPAT_LOADERS controls the presence of table 'package.loaders'.
 344 ** You can replace it with 'package.searchers'.
 345 */
 346 #define LUA_COMPAT_LOADERS
 347
 348 /*
 349 @@ macro 'lua_cpcall' emulates deprecated function lua_cpcall.
 350 ** You can call your C function directly (with light C functions).
 351 */
 352 #define lua_cpcall(L,f,u)  \
 353         (lua_pushcfunction(L, (f)), \
 354          lua_pushlightuserdata(L,(u)), \
 355          lua_pcall(L,1,0,0))
 356
 357
 358 /*
 359 @@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library.
 360 ** You can rewrite 'log10(x)' as 'log(x, 10)'.
 361 */
 362 #define LUA_COMPAT_LOG10
 363
 364 /*
 365 @@ LUA_COMPAT_LOADSTRING defines the function 'loadstring' in the base
 366 ** library. You can rewrite 'loadstring(s)' as 'load(s)'.
 367 */
 368 #define LUA_COMPAT_LOADSTRING
 369
 370 /*
 371 @@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library.
 372 */
 373 #define LUA_COMPAT_MAXN
 374
 375 /*
 376 @@ The following macros supply trivial compatibility for some
 377 ** changes in the API. The macros themselves document how to
 378 ** change your code to avoid using them.
 379 */
 380 #define lua_strlen(L,i)         lua_rawlen(L, (i))
 381
 382 #define lua_objlen(L,i)         lua_rawlen(L, (i))
 383
 384 #define lua_equal(L,idx1,idx2)          lua_compare(L,(idx1),(idx2),LUA_OPEQ)
 385 #define lua_lessthan(L,idx1,idx2)       lua_compare(L,(idx1),(idx2),LUA_OPLT)
 386
 387 /*
 388 @@ LUA_COMPAT_MODULE controls compatibility with previous
 389 ** module functions 'module' (Lua) and 'luaL_register' (C).
 390 */
 391 #define LUA_COMPAT_MODULE
 392
 393 #endif                          /* } */
 394
 395
 396 /*
 397 @@ LUA_COMPAT_FLOATSTRING makes Lua format integral floats without a
 398 @@ a float mark ('.0').
 399 ** This macro is not on by default even in compatibility mode,
 400 ** because this is not really an incompatibility.
 401 */
 402 /* #define LUA_COMPAT_FLOATSTRING */
 403
 404 /* }================================================================== */
 405
 406
 407
 408 /*
 409 ** {==================================================================
 410 ** Configuration for Numbers.
 411 ** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_*
 412 ** satisfy your needs.
 413 ** ===================================================================
 414 */
 415
 416 /*
 417 @@ LUA_NUMBER is the floating-point type used by Lua.
 418 @@ LUAI_UACNUMBER is the result of a 'default argument promotion'
 419 @@ over a floating number.
 420 @@ l_mathlim(x) corrects limit name 'x' to the proper float type
 421 ** by prefixing it with one of FLT/DBL/LDBL.
 422 @@ LUA_NUMBER_FRMLEN is the length modifier for writing floats.
 423 @@ LUA_NUMBER_FMT is the format for writing floats.
 424 @@ lua_number2str converts a float to a string.
 425 @@ l_mathop allows the addition of an 'l' or 'f' to all math operations.
 426 @@ l_floor takes the floor of a float.
 427 @@ lua_str2number converts a decimal numeric string to a number.
 428 */
 429
 430
 431 /* The following definitions are good for most cases here */
 432
 433 #define l_floor(x)              (l_mathop(floor)(x))
 434
 435 #define lua_number2str(s,sz,n)  \
 436         l_sprintf((s), sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)(n))
 437
 438 /*
 439 @@ lua_numbertointeger converts a float number to an integer, or
 440 ** returns 0 if float is not within the range of a lua_Integer.
 441 ** (The range comparisons are tricky because of rounding. The tests
 442 ** here assume a two-complement representation, where MININTEGER always
 443 ** has an exact representation as a float; MAXINTEGER may not have one,
 444 ** and therefore its conversion to float may have an ill-defined value.)
 445 */
 446 #define lua_numbertointeger(n,p) \
 447   ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \
 448    (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \
 449       (*(p) = (LUA_INTEGER)(n), 1))
 450
 451
 452 /* now the variable definitions */
 453
 454 #if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT           /* { single float */
 455
 456 #define LUA_NUMBER      float
 457
 458 #define l_mathlim(n)            (FLT_##n)
 459
 460 #define LUAI_UACNUMBER  double
 461
 462 #define LUA_NUMBER_FRMLEN       ""
 463 #define LUA_NUMBER_FMT          "%.7g"
 464
 465 #define l_mathop(op)            op##f
 466
 467 #define lua_str2number(s,p)     strtof((s), (p))
 468
 469
 470 #elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE    /* }{ long double */
 471
 472 #define LUA_NUMBER      long double
 473
 474 #define l_mathlim(n)            (LDBL_##n)
 475
 476 #define LUAI_UACNUMBER  long double
 477
 478 #define LUA_NUMBER_FRMLEN       "L"
 479 #define LUA_NUMBER_FMT          "%.19Lg"
 480
 481 #define l_mathop(op)            op##l
 482
 483 #define lua_str2number(s,p)     strtold((s), (p))
 484
 485 #elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE        /* }{ double */
 486
 487 #define LUA_NUMBER      double
 488
 489 #define l_mathlim(n)            (DBL_##n)
 490
 491 #define LUAI_UACNUMBER  double
 492
 493 #define LUA_NUMBER_FRMLEN       ""
 494 #define LUA_NUMBER_FMT          "%.14g"
 495
 496 #define l_mathop(op)            op
 497
 498 #define lua_str2number(s,p)     strtod((s), (p))
 499
 500 #else                                           /* }{ */
 501
 502 #error "numeric float type not defined"
 503
 504 #endif                                  /* } */
 505
 506
 507
 508 /*
 509 @@ LUA_INTEGER is the integer type used by Lua.
 510 **
 511 @@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
 512 **
 513 @@ LUAI_UACINT is the result of a 'default argument promotion'
 514 @@ over a lUA_INTEGER.
 515 @@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers.
 516 @@ LUA_INTEGER_FMT is the format for writing integers.
 517 @@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER.
 518 @@ LUA_MININTEGER is the minimum value for a LUA_INTEGER.
 519 @@ lua_integer2str converts an integer to a string.
 520 */
 521
 522
 523 /* The following definitions are good for most cases here */
 524
 525 #define LUA_INTEGER_FMT         "%" LUA_INTEGER_FRMLEN "d"
 526
 527 #define LUAI_UACINT             LUA_INTEGER
 528
 529 #define lua_integer2str(s,sz,n)  \
 530         l_sprintf((s), sz, LUA_INTEGER_FMT, (LUAI_UACINT)(n))
 531
 532 /*
 533 ** use LUAI_UACINT here to avoid problems with promotions (which
 534 ** can turn a comparison between unsigneds into a signed comparison)
 535 */
 536 #define LUA_UNSIGNED            unsigned LUAI_UACINT
 537
 538
 539 /* now the variable definitions */
 540
 541 #if LUA_INT_TYPE == LUA_INT_INT         /* { int */
 542
 543 #define LUA_INTEGER             int
 544 #define LUA_INTEGER_FRMLEN      ""
 545
 546 #define LUA_MAXINTEGER          INT_MAX
 547 #define LUA_MININTEGER          INT_MIN
 548
 549 #elif LUA_INT_TYPE == LUA_INT_LONG      /* }{ long */
 550
 551 #define LUA_INTEGER             long
 552 #define LUA_INTEGER_FRMLEN      "l"
 553
 554 #define LUA_MAXINTEGER          LONG_MAX
 555 #define LUA_MININTEGER          LONG_MIN
 556
 557 #elif LUA_INT_TYPE == LUA_INT_LONGLONG  /* }{ long long */
 558
 559 /* use presence of macro LLONG_MAX as proxy for C99 compliance */
 560 #if defined(LLONG_MAX)          /* { */
 561 /* use ISO C99 stuff */
 562
 563 #define LUA_INTEGER             long long
 564 #define LUA_INTEGER_FRMLEN      "ll"
 565
 566 #define LUA_MAXINTEGER          LLONG_MAX
 567 #define LUA_MININTEGER          LLONG_MIN
 568
 569 #elif defined(LUA_USE_WINDOWS) /* }{ */
 570 /* in Windows, can use specific Windows types */
 571
 572 #define LUA_INTEGER             __int64
 573 #define LUA_INTEGER_FRMLEN      "I64"
 574
 575 #define LUA_MAXINTEGER          _I64_MAX
 576 #define LUA_MININTEGER          _I64_MIN
 577
 578 #else                           /* }{ */
 579
 580 #error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \
 581   or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)"
 582
 583 #endif                          /* } */
 584
 585 #else                           /* }{ */
 586
 587 #error "numeric integer type not defined"
 588
 589 #endif                          /* } */
 590
 591 /* }================================================================== */
 592
 593
 594 /*
 595 ** {==================================================================
 596 ** Dependencies with C99 and other C details
 597 ** ===================================================================
 598 */
 599
 600 /*
 601 @@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89.
 602 ** (All uses in Lua have only one format item.)
 603 */
 604 #if !defined(LUA_USE_C89)
 605 #define l_sprintf(s,sz,f,i)     snprintf(s,sz,f,i)
 606 #else
 607 #define l_sprintf(s,sz,f,i)     ((void)(sz), sprintf(s,f,i))
 608 #endif
 609
 610
 611 /*
 612 @@ lua_strx2number converts an hexadecimal numeric string to a number.
 613 ** In C99, 'strtod' does that conversion. Otherwise, you can
 614 ** leave 'lua_strx2number' undefined and Lua will provide its own
 615 ** implementation.
 616 */
 617 #if !defined(LUA_USE_C89)
 618 #define lua_strx2number(s,p)            lua_str2number(s,p)
 619 #endif
 620
 621
 622 /*
 623 @@ lua_number2strx converts a float to an hexadecimal numeric string.
 624 ** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that.
 625 ** Otherwise, you can leave 'lua_number2strx' undefined and Lua will
 626 ** provide its own implementation.
 627 */
 628 #if !defined(LUA_USE_C89)
 629 #define lua_number2strx(L,b,sz,f,n)  \
 630         ((void)L, l_sprintf(b,sz,f,(LUAI_UACNUMBER)(n)))
 631 #endif
 632
 633
 634 /*
 635 ** 'strtof' and 'opf' variants for math functions are not valid in
 636 ** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the
 637 ** availability of these variants. ('math.h' is already included in
 638 ** all files that use these macros.)
 639 */
 640 #if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF))
 641 #undef l_mathop  /* variants not available */
 642 #undef lua_str2number
 643 #define l_mathop(op)            (lua_Number)op  /* no variant */
 644 #define lua_str2number(s,p)     ((lua_Number)strtod((s), (p)))
 645 #endif
 646
 647
 648 /*
 649 @@ LUA_KCONTEXT is the type of the context ('ctx') for continuation
 650 ** functions.  It must be a numerical type; Lua will use 'intptr_t' if
 651 ** available, otherwise it will use 'ptrdiff_t' (the nearest thing to
 652 ** 'intptr_t' in C89)
 653 */
 654 #define LUA_KCONTEXT    ptrdiff_t
 655
 656 #if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \
 657     __STDC_VERSION__ >= 199901L
 658 #include <stdint.h>
 659 #if defined(INTPTR_MAX)  /* even in C99 this type is optional */
 660 #undef LUA_KCONTEXT
 661 #define LUA_KCONTEXT    intptr_t
 662 #endif
 663 #endif
 664
 665
 666 /*
 667 @@ lua_getlocaledecpoint gets the locale "radix character" (decimal point).
 668 ** Change that if you do not want to use C locales. (Code using this
 669 ** macro must include header 'locale.h'.)
 670 */
 671 #if !defined(lua_getlocaledecpoint)
 672 #define lua_getlocaledecpoint()         (localeconv()->decimal_point[0])
 673 #endif
 674
 675 /* }================================================================== */
 676
 677
 678 /*
 679 ** {==================================================================
 680 ** Language Variations
 681 ** =====================================================================
 682 */
 683
 684 /*
 685 @@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some
 686 ** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from
 687 ** numbers to strings. Define LUA_NOCVTS2N to turn off automatic
 688 ** coercion from strings to numbers.
 689 */
 690 /* #define LUA_NOCVTN2S */
 691 /* #define LUA_NOCVTS2N */
 692
 693
 694 /*
 695 @@ LUA_USE_APICHECK turns on several consistency checks on the C API.
 696 ** Define it as a help when debugging C code.
 697 */
 698 #if defined(LUA_USE_APICHECK)
 699 #include <assert.h>
 700 #define luai_apicheck(l,e)      assert(e)
 701 #endif
 702
 703 /* }================================================================== */
 704
 705
 706 /*
 707 ** {==================================================================
 708 ** Macros that affect the API and must be stable (that is, must be the
 709 ** same when you compile Lua and when you compile code that links to
 710 ** Lua). You probably do not want/need to change them.
 711 ** =====================================================================
 712 */
 713
 714 /*
 715 @@ LUAI_MAXSTACK limits the size of the Lua stack.
 716 ** CHANGE it if you need a different limit. This limit is arbitrary;
 717 ** its only purpose is to stop Lua from consuming unlimited stack
 718 ** space (and to reserve some numbers for pseudo-indices).
 719 */
 720 #if LUAI_BITSINT >= 32
 721 #define LUAI_MAXSTACK           1000000
 722 #else
 723 #define LUAI_MAXSTACK           15000
 724 #endif
 725
 726
 727 /*
 728 @@ LUA_EXTRASPACE defines the size of a raw memory area associated with
 729 ** a Lua state with very fast access.
 730 ** CHANGE it if you need a different size.
 731 */
 732 #define LUA_EXTRASPACE          (sizeof(void *))
 733
 734
 735 /*
 736 @@ LUA_IDSIZE gives the maximum size for the description of the source
 737 @@ of a function in debug information.
 738 ** CHANGE it if you want a different size.
 739 */
 740 #define LUA_IDSIZE      60
 741
 742
 743 /*
 744 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
 745 ** CHANGE it if it uses too much C-stack space. (For long double,
 746 ** 'string.format("%.99f", -1e4932)' needs 5034 bytes, so a
 747 ** smaller buffer would force a memory allocation for each call to
 748 ** 'string.format'.)
 749 */
 750 #if LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE
 751 #define LUAL_BUFFERSIZE         8192
 752 #else
 753 #define LUAL_BUFFERSIZE   ((int)(0x80 * sizeof(void*) * sizeof(lua_Integer)))
 754 #endif
 755
 756 /* }================================================================== */
 757
 758
 759 /*
 760 @@ LUA_QL describes how error messages quote program elements.
 761 ** Lua does not use these macros anymore; they are here for
 762 ** compatibility only.
 763 */
 764 #define LUA_QL(x)       "'" x "'"
 765 #define LUA_QS          LUA_QL("%s")
 766
 767
 768
 769
 770 /* =================================================================== */
 771
 772 /*
 773 ** Local configuration. You can use this space to add your redefinitions
 774 ** without modifying the main part of the file.
 775 */
 776
 777
 778
 779
 780
 781 #endif
 782