1 /* 2 ** $Id: luaconf.h $ 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 15 /* 16 ** =================================================================== 17 ** General Configuration File for Lua 18 ** 19 ** Some definitions here can be changed externally, through the compiler 20 ** (e.g., with '-D' options): They are commented out or protected 21 ** by '#if !defined' guards. However, several other definitions 22 ** should be changed directly here, either because they affect the 23 ** Lua ABI (by making the changes here, you ensure that all software 24 ** connected to Lua, such as C libraries, will be compiled with the same 25 ** configuration); or because they are seldom changed. 26 ** 27 ** Search for "@@" to find all configurable definitions. 28 ** =================================================================== 29 */ 30 31 32 /* 33 ** {==================================================================== 34 ** System Configuration: macros to adapt (if needed) Lua to some 35 ** particular platform, for instance restricting it to C89. 36 ** ===================================================================== 37 */ 38 39 /* 40 @@ LUA_USE_C89 controls the use of non-ISO-C89 features. 41 ** Define it if you want Lua to avoid the use of a few C99 features 42 ** or Windows-specific features on Windows. 43 */ 44 /* #define LUA_USE_C89 */ 45 46 47 /* 48 ** By default, Lua on Windows use (some) specific Windows features 49 */ 50 #if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE) 51 #define LUA_USE_WINDOWS /* enable goodies for regular Windows */ 52 #endif 53 54 55 #if defined(LUA_USE_WINDOWS) 56 #define LUA_DL_DLL /* enable support for DLL */ 57 #define LUA_USE_C89 /* broadly, Windows is C89 */ 58 #endif 59 60 61 #if defined(LUA_USE_LINUX) 62 #define LUA_USE_POSIX 63 #define LUA_USE_DLOPEN /* needs an extra library: -ldl */ 64 #endif 65 66 67 #if defined(LUA_USE_MACOSX) 68 #define LUA_USE_POSIX 69 #define LUA_USE_DLOPEN /* MacOS does not need -ldl */ 70 #endif 71 72 73 #if defined(LUA_USE_IOS) 74 #define LUA_USE_POSIX 75 #define LUA_USE_DLOPEN 76 #endif 77 78 79 /* 80 @@ LUAI_IS32INT is true iff 'int' has (at least) 32 bits. 81 */ 82 #define LUAI_IS32INT ((UINT_MAX >> 30) >= 3) 83 84 /* }================================================================== */ 85 86 87 88 /* 89 ** {================================================================== 90 ** Configuration for Number types. These options should not be 91 ** set externally, because any other code connected to Lua must 92 ** use the same configuration. 93 ** =================================================================== 94 */ 95 96 /* 97 @@ LUA_INT_TYPE defines the type for Lua integers. 98 @@ LUA_FLOAT_TYPE defines the type for Lua floats. 99 ** Lua should work fine with any mix of these options supported 100 ** by your C compiler. The usual configurations are 64-bit integers 101 ** and 'double' (the default), 32-bit integers and 'float' (for 102 ** restricted platforms), and 'long'/'double' (for C compilers not 103 ** compliant with C99, which may not have support for 'long long'). 104 */ 105 106 /* predefined options for LUA_INT_TYPE */ 107 #define LUA_INT_INT 1 108 #define LUA_INT_LONG 2 109 #define LUA_INT_LONGLONG 3 110 111 /* predefined options for LUA_FLOAT_TYPE */ 112 #define LUA_FLOAT_FLOAT 1 113 #define LUA_FLOAT_DOUBLE 2 114 #define LUA_FLOAT_LONGDOUBLE 3 115 116 117 /* Default configuration ('long long' and 'double', for 64-bit Lua) */ 118 #define LUA_INT_DEFAULT LUA_INT_LONGLONG 119 #define LUA_FLOAT_DEFAULT LUA_FLOAT_DOUBLE 120 121 122 /* 123 @@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats. 124 */ 125 #define LUA_32BITS 0 126 127 128 /* 129 @@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for 130 ** C89 ('long' and 'double'); Windows always has '__int64', so it does 131 ** not need to use this case. 132 */ 133 #if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS) 134 #define LUA_C89_NUMBERS 1 135 #else 136 #define LUA_C89_NUMBERS 0 137 #endif 138 139 140 #if LUA_32BITS /* { */ 141 /* 142 ** 32-bit integers and 'float' 143 */ 144 #if LUAI_IS32INT /* use 'int' if big enough */ 145 #define LUA_INT_TYPE LUA_INT_INT 146 #else /* otherwise use 'long' */ 147 #define LUA_INT_TYPE LUA_INT_LONG 148 #endif 149 #define LUA_FLOAT_TYPE LUA_FLOAT_FLOAT 150 151 #elif LUA_C89_NUMBERS /* }{ */ 152 /* 153 ** largest types available for C89 ('long' and 'double') 154 */ 155 #define LUA_INT_TYPE LUA_INT_LONG 156 #define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE 157 158 #else /* }{ */ 159 /* use defaults */ 160 161 #define LUA_INT_TYPE LUA_INT_DEFAULT 162 #define LUA_FLOAT_TYPE LUA_FLOAT_DEFAULT 163 164 #endif /* } */ 165 166 167 /* }================================================================== */ 168 169 170 171 /* 172 ** {================================================================== 173 ** Configuration for Paths. 174 ** =================================================================== 175 */ 176 177 /* 178 ** LUA_PATH_SEP is the character that separates templates in a path. 179 ** LUA_PATH_MARK is the string that marks the substitution points in a 180 ** template. 181 ** LUA_EXEC_DIR in a Windows path is replaced by the executable's 182 ** directory. 183 */ 184 #define LUA_PATH_SEP ";" 185 #define LUA_PATH_MARK "?" 186 #define LUA_EXEC_DIR "!" 187 188 189 /* 190 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for 191 ** Lua libraries. 192 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for 193 ** C libraries. 194 ** CHANGE them if your machine has a non-conventional directory 195 ** hierarchy or if you want to install your libraries in 196 ** non-conventional directories. 197 */ 198 199 #define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR 200 #if defined(_WIN32) /* { */ 201 /* 202 ** In Windows, any exclamation mark ('!') in the path is replaced by the 203 ** path of the directory of the executable file of the current process. 204 */ 205 #define LUA_LDIR "!\\lua\\" 206 #define LUA_CDIR "!\\" 207 #define LUA_SHRDIR "!\\..\\share\\lua\\" LUA_VDIR "\\" 208 209 #if !defined(LUA_PATH_DEFAULT) 210 #define LUA_PATH_DEFAULT \ 211 LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \ 212 LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" \ 213 LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \ 214 ".\\?.lua;" ".\\?\\init.lua" 215 #endif 216 217 #if !defined(LUA_CPATH_DEFAULT) 218 #define LUA_CPATH_DEFAULT \ 219 LUA_CDIR"?.dll;" \ 220 LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \ 221 LUA_CDIR"loadall.dll;" ".\\?.dll" 222 #endif 223 224 #else /* }{ */ 225 226 #define LUA_ROOT "/usr/local/" 227 #define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR "/" 228 #define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR "/" 229 230 #if !defined(LUA_PATH_DEFAULT) 231 #define LUA_PATH_DEFAULT \ 232 LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \ 233 LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" \ 234 "./?.lua;" "./?/init.lua" 235 #endif 236 237 #if !defined(LUA_CPATH_DEFAULT) 238 #define LUA_CPATH_DEFAULT \ 239 LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so" 240 #endif 241 242 #endif /* } */ 243 244 245 /* 246 @@ LUA_DIRSEP is the directory separator (for submodules). 247 ** CHANGE it if your machine does not use "/" as the directory separator 248 ** and is not Windows. (On Windows Lua automatically uses "\".) 249 */ 250 #if !defined(LUA_DIRSEP) 251 252 #if defined(_WIN32) 253 #define LUA_DIRSEP "\\" 254 #else 255 #define LUA_DIRSEP "/" 256 #endif 257 258 #endif 259 260 261 /* 262 ** LUA_IGMARK is a mark to ignore all after it when building the 263 ** module name (e.g., used to build the luaopen_ function name). 264 ** Typically, the suffix after the mark is the module version, 265 ** as in "mod-v1.2.so". 266 */ 267 #define LUA_IGMARK "-" 268 269 /* }================================================================== */ 270 271 272 /* 273 ** {================================================================== 274 ** Marks for exported symbols in the C code 275 ** =================================================================== 276 */ 277 278 /* 279 @@ LUA_API is a mark for all core API functions. 280 @@ LUALIB_API is a mark for all auxiliary library functions. 281 @@ LUAMOD_API is a mark for all standard library opening functions. 282 ** CHANGE them if you need to define those functions in some special way. 283 ** For instance, if you want to create one Windows DLL with the core and 284 ** the libraries, you may want to use the following definition (define 285 ** LUA_BUILD_AS_DLL to get it). 286 */ 287 #if defined(LUA_BUILD_AS_DLL) /* { */ 288 289 #if defined(LUA_CORE) || defined(LUA_LIB) /* { */ 290 #define LUA_API __declspec(dllexport) 291 #else /* }{ */ 292 #define LUA_API __declspec(dllimport) 293 #endif /* } */ 294 295 #else /* }{ */ 296 297 #define LUA_API extern 298 299 #endif /* } */ 300 301 302 /* 303 ** More often than not the libs go together with the core. 304 */ 305 #define LUALIB_API LUA_API 306 #define LUAMOD_API LUA_API 307 308 309 /* 310 @@ LUAI_FUNC is a mark for all extern functions that are not to be 311 ** exported to outside modules. 312 @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables, 313 ** none of which to be exported to outside modules (LUAI_DDEF for 314 ** definitions and LUAI_DDEC for declarations). 315 ** CHANGE them if you need to mark them in some special way. Elf/gcc 316 ** (versions 3.2 and later) mark them as "hidden" to optimize access 317 ** when Lua is compiled as a shared library. Not all elf targets support 318 ** this attribute. Unfortunately, gcc does not offer a way to check 319 ** whether the target offers that support, and those without support 320 ** give a warning about it. To avoid these warnings, change to the 321 ** default definition. 322 */ 323 #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ 324 defined(__ELF__) /* { */ 325 #define LUAI_FUNC __attribute__((visibility("internal"))) extern 326 #else /* }{ */ 327 #define LUAI_FUNC extern 328 #endif /* } */ 329 330 #define LUAI_DDEC(dec) LUAI_FUNC dec 331 #define LUAI_DDEF /* empty */ 332 333 /* }================================================================== */ 334 335 336 /* 337 ** {================================================================== 338 ** Compatibility with previous versions 339 ** =================================================================== 340 */ 341 342 /* 343 @@ LUA_COMPAT_5_3 controls other macros for compatibility with Lua 5.3. 344 ** You can define it to get all options, or change specific options 345 ** to fit your specific needs. 346 */ 347 #if defined(LUA_COMPAT_5_3) /* { */ 348 349 /* 350 @@ LUA_COMPAT_MATHLIB controls the presence of several deprecated 351 ** functions in the mathematical library. 352 ** (These functions were already officially removed in 5.3; 353 ** nevertheless they are still available here.) 354 */ 355 #define LUA_COMPAT_MATHLIB 356 357 /* 358 @@ LUA_COMPAT_APIINTCASTS controls the presence of macros for 359 ** manipulating other integer types (lua_pushunsigned, lua_tounsigned, 360 ** luaL_checkint, luaL_checklong, etc.) 361 ** (These macros were also officially removed in 5.3, but they are still 362 ** available here.) 363 */ 364 #define LUA_COMPAT_APIINTCASTS 365 366 367 /* 368 @@ LUA_COMPAT_LT_LE controls the emulation of the '__le' metamethod 369 ** using '__lt'. 370 */ 371 #define LUA_COMPAT_LT_LE 372 373 374 /* 375 @@ The following macros supply trivial compatibility for some 376 ** changes in the API. The macros themselves document how to 377 ** change your code to avoid using them. 378 ** (Once more, these macros were officially removed in 5.3, but they are 379 ** still available here.) 380 */ 381 #define lua_strlen(L,i) lua_rawlen(L, (i)) 382 383 #define lua_objlen(L,i) lua_rawlen(L, (i)) 384 385 #define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ) 386 #define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT) 387 388 #endif /* } */ 389 390 /* }================================================================== */ 391 392 393 394 /* 395 ** {================================================================== 396 ** Configuration for Numbers (low-level part). 397 ** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_* 398 ** satisfy your needs. 399 ** =================================================================== 400 */ 401 402 /* 403 @@ LUAI_UACNUMBER is the result of a 'default argument promotion' 404 @@ over a floating number. 405 @@ l_floatatt(x) corrects float attribute 'x' to the proper float type 406 ** by prefixing it with one of FLT/DBL/LDBL. 407 @@ LUA_NUMBER_FRMLEN is the length modifier for writing floats. 408 @@ LUA_NUMBER_FMT is the format for writing floats. 409 @@ lua_number2str converts a float to a string. 410 @@ l_mathop allows the addition of an 'l' or 'f' to all math operations. 411 @@ l_floor takes the floor of a float. 412 @@ lua_str2number converts a decimal numeral to a number. 413 */ 414 415 416 /* The following definitions are good for most cases here */ 417 418 #define l_floor(x) (l_mathop(floor)(x)) 419 420 #define lua_number2str(s,sz,n) \ 421 l_sprintf((s), sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)(n)) 422 423 /* 424 @@ lua_numbertointeger converts a float number with an integral value 425 ** to an integer, or returns 0 if float is not within the range of 426 ** a lua_Integer. (The range comparisons are tricky because of 427 ** rounding. The tests here assume a two-complement representation, 428 ** where MININTEGER always has an exact representation as a float; 429 ** MAXINTEGER may not have one, and therefore its conversion to float 430 ** may have an ill-defined value.) 431 */ 432 #define lua_numbertointeger(n,p) \ 433 ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \ 434 (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \ 435 (*(p) = (LUA_INTEGER)(n), 1)) 436 437 438 /* now the variable definitions */ 439 440 #if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT /* { single float */ 441 442 #define LUA_NUMBER float 443 444 #define l_floatatt(n) (FLT_##n) 445 446 #define LUAI_UACNUMBER double 447 448 #define LUA_NUMBER_FRMLEN "" 449 #define LUA_NUMBER_FMT "%.7g" 450 451 #define l_mathop(op) op##f 452 453 #define lua_str2number(s,p) strtof((s), (p)) 454 455 456 #elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE /* }{ long double */ 457 458 #define LUA_NUMBER long double 459 460 #define l_floatatt(n) (LDBL_##n) 461 462 #define LUAI_UACNUMBER long double 463 464 #define LUA_NUMBER_FRMLEN "L" 465 #define LUA_NUMBER_FMT "%.19Lg" 466 467 #define l_mathop(op) op##l 468 469 #define lua_str2number(s,p) strtold((s), (p)) 470 471 #elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE /* }{ double */ 472 473 #define LUA_NUMBER double 474 475 #define l_floatatt(n) (DBL_##n) 476 477 #define LUAI_UACNUMBER double 478 479 #define LUA_NUMBER_FRMLEN "" 480 #define LUA_NUMBER_FMT "%.14g" 481 482 #define l_mathop(op) op 483 484 #define lua_str2number(s,p) strtod((s), (p)) 485 486 #else /* }{ */ 487 488 #error "numeric float type not defined" 489 490 #endif /* } */ 491 492 493 494 /* 495 @@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER. 496 @@ LUAI_UACINT is the result of a 'default argument promotion' 497 @@ over a LUA_INTEGER. 498 @@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers. 499 @@ LUA_INTEGER_FMT is the format for writing integers. 500 @@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER. 501 @@ LUA_MININTEGER is the minimum value for a LUA_INTEGER. 502 @@ LUA_MAXUNSIGNED is the maximum value for a LUA_UNSIGNED. 503 @@ lua_integer2str converts an integer to a string. 504 */ 505 506 507 /* The following definitions are good for most cases here */ 508 509 #define LUA_INTEGER_FMT "%" LUA_INTEGER_FRMLEN "d" 510 511 #define LUAI_UACINT LUA_INTEGER 512 513 #define lua_integer2str(s,sz,n) \ 514 l_sprintf((s), sz, LUA_INTEGER_FMT, (LUAI_UACINT)(n)) 515 516 /* 517 ** use LUAI_UACINT here to avoid problems with promotions (which 518 ** can turn a comparison between unsigneds into a signed comparison) 519 */ 520 #define LUA_UNSIGNED unsigned LUAI_UACINT 521 522 523 /* now the variable definitions */ 524 525 #if LUA_INT_TYPE == LUA_INT_INT /* { int */ 526 527 #define LUA_INTEGER int 528 #define LUA_INTEGER_FRMLEN "" 529 530 #define LUA_MAXINTEGER INT_MAX 531 #define LUA_MININTEGER INT_MIN 532 533 #define LUA_MAXUNSIGNED UINT_MAX 534 535 #elif LUA_INT_TYPE == LUA_INT_LONG /* }{ long */ 536 537 #define LUA_INTEGER long 538 #define LUA_INTEGER_FRMLEN "l" 539 540 #define LUA_MAXINTEGER LONG_MAX 541 #define LUA_MININTEGER LONG_MIN 542 543 #define LUA_MAXUNSIGNED ULONG_MAX 544 545 #elif LUA_INT_TYPE == LUA_INT_LONGLONG /* }{ long long */ 546 547 /* use presence of macro LLONG_MAX as proxy for C99 compliance */ 548 #if defined(LLONG_MAX) /* { */ 549 /* use ISO C99 stuff */ 550 551 #define LUA_INTEGER long long 552 #define LUA_INTEGER_FRMLEN "ll" 553 554 #define LUA_MAXINTEGER LLONG_MAX 555 #define LUA_MININTEGER LLONG_MIN 556 557 #define LUA_MAXUNSIGNED ULLONG_MAX 558 559 #elif defined(LUA_USE_WINDOWS) /* }{ */ 560 /* in Windows, can use specific Windows types */ 561 562 #define LUA_INTEGER __int64 563 #define LUA_INTEGER_FRMLEN "I64" 564 565 #define LUA_MAXINTEGER _I64_MAX 566 #define LUA_MININTEGER _I64_MIN 567 568 #define LUA_MAXUNSIGNED _UI64_MAX 569 570 #else /* }{ */ 571 572 #error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \ 573 or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)" 574 575 #endif /* } */ 576 577 #else /* }{ */ 578 579 #error "numeric integer type not defined" 580 581 #endif /* } */ 582 583 /* }================================================================== */ 584 585 586 /* 587 ** {================================================================== 588 ** Dependencies with C99 and other C details 589 ** =================================================================== 590 */ 591 592 /* 593 @@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89. 594 ** (All uses in Lua have only one format item.) 595 */ 596 #if !defined(LUA_USE_C89) 597 #define l_sprintf(s,sz,f,i) snprintf(s,sz,f,i) 598 #else 599 #define l_sprintf(s,sz,f,i) ((void)(sz), sprintf(s,f,i)) 600 #endif 601 602 603 /* 604 @@ lua_strx2number converts a hexadecimal numeral to a number. 605 ** In C99, 'strtod' does that conversion. Otherwise, you can 606 ** leave 'lua_strx2number' undefined and Lua will provide its own 607 ** implementation. 608 */ 609 #if !defined(LUA_USE_C89) 610 #define lua_strx2number(s,p) lua_str2number(s,p) 611 #endif 612 613 614 /* 615 @@ lua_pointer2str converts a pointer to a readable string in a 616 ** non-specified way. 617 */ 618 #define lua_pointer2str(buff,sz,p) l_sprintf(buff,sz,"%p",p) 619 620 621 /* 622 @@ lua_number2strx converts a float to a hexadecimal numeral. 623 ** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that. 624 ** Otherwise, you can leave 'lua_number2strx' undefined and Lua will 625 ** provide its own implementation. 626 */ 627 #if !defined(LUA_USE_C89) 628 #define lua_number2strx(L,b,sz,f,n) \ 629 ((void)L, l_sprintf(b,sz,f,(LUAI_UACNUMBER)(n))) 630 #endif 631 632 633 /* 634 ** 'strtof' and 'opf' variants for math functions are not valid in 635 ** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the 636 ** availability of these variants. ('math.h' is already included in 637 ** all files that use these macros.) 638 */ 639 #if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF)) 640 #undef l_mathop /* variants not available */ 641 #undef lua_str2number 642 #define l_mathop(op) (lua_Number)op /* no variant */ 643 #define lua_str2number(s,p) ((lua_Number)strtod((s), (p))) 644 #endif 645 646 647 /* 648 @@ LUA_KCONTEXT is the type of the context ('ctx') for continuation 649 ** functions. It must be a numerical type; Lua will use 'intptr_t' if 650 ** available, otherwise it will use 'ptrdiff_t' (the nearest thing to 651 ** 'intptr_t' in C89) 652 */ 653 #define LUA_KCONTEXT ptrdiff_t 654 655 #if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \ 656 __STDC_VERSION__ >= 199901L 657 #include <stdint.h> 658 #if defined(INTPTR_MAX) /* even in C99 this type is optional */ 659 #undef LUA_KCONTEXT 660 #define LUA_KCONTEXT intptr_t 661 #endif 662 #endif 663 664 665 /* 666 @@ lua_getlocaledecpoint gets the locale "radix character" (decimal point). 667 ** Change that if you do not want to use C locales. (Code using this 668 ** macro must include the header 'locale.h'.) 669 */ 670 #if !defined(lua_getlocaledecpoint) 671 #define lua_getlocaledecpoint() (localeconv()->decimal_point[0]) 672 #endif 673 674 675 /* 676 ** macros to improve jump prediction, used mostly for error handling 677 ** and debug facilities. (Some macros in the Lua API use these macros. 678 ** Define LUA_NOBUILTIN if you do not want '__builtin_expect' in your 679 ** code.) 680 */ 681 #if !defined(luai_likely) 682 683 #if defined(__GNUC__) && !defined(LUA_NOBUILTIN) 684 #define luai_likely(x) (__builtin_expect(((x) != 0), 1)) 685 #define luai_unlikely(x) (__builtin_expect(((x) != 0), 0)) 686 #else 687 #define luai_likely(x) (x) 688 #define luai_unlikely(x) (x) 689 #endif 690 691 #endif 692 693 694 #if defined(LUA_CORE) || defined(LUA_LIB) 695 /* shorter names for Lua's own use */ 696 #define l_likely(x) luai_likely(x) 697 #define l_unlikely(x) luai_unlikely(x) 698 #endif 699 700 701 702 /* }================================================================== */ 703 704 705 /* 706 ** {================================================================== 707 ** Language Variations 708 ** ===================================================================== 709 */ 710 711 /* 712 @@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some 713 ** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from 714 ** numbers to strings. Define LUA_NOCVTS2N to turn off automatic 715 ** coercion from strings to numbers. 716 */ 717 /* #define LUA_NOCVTN2S */ 718 /* #define LUA_NOCVTS2N */ 719 720 721 /* 722 @@ LUA_USE_APICHECK turns on several consistency checks on the C API. 723 ** Define it as a help when debugging C code. 724 */ 725 #if defined(LUA_USE_APICHECK) 726 #include <assert.h> 727 #define luai_apicheck(l,e) assert(e) 728 #endif 729 730 /* }================================================================== */ 731 732 733 /* 734 ** {================================================================== 735 ** Macros that affect the API and must be stable (that is, must be the 736 ** same when you compile Lua and when you compile code that links to 737 ** Lua). 738 ** ===================================================================== 739 */ 740 741 /* 742 @@ LUAI_MAXSTACK limits the size of the Lua stack. 743 ** CHANGE it if you need a different limit. This limit is arbitrary; 744 ** its only purpose is to stop Lua from consuming unlimited stack 745 ** space (and to reserve some numbers for pseudo-indices). 746 ** (It must fit into max(size_t)/32 and max(int)/2.) 747 */ 748 #if LUAI_IS32INT 749 #define LUAI_MAXSTACK 1000000 750 #else 751 #define LUAI_MAXSTACK 15000 752 #endif 753 754 755 /* 756 @@ LUA_EXTRASPACE defines the size of a raw memory area associated with 757 ** a Lua state with very fast access. 758 ** CHANGE it if you need a different size. 759 */ 760 #define LUA_EXTRASPACE (sizeof(void *)) 761 762 763 /* 764 @@ LUA_IDSIZE gives the maximum size for the description of the source 765 ** of a function in debug information. 766 ** CHANGE it if you want a different size. 767 */ 768 #define LUA_IDSIZE 60 769 770 771 /* 772 @@ LUAL_BUFFERSIZE is the initial buffer size used by the lauxlib 773 ** buffer system. 774 */ 775 #define LUAL_BUFFERSIZE ((int)(16 * sizeof(void*) * sizeof(lua_Number))) 776 777 778 /* 779 @@ LUAI_MAXALIGN defines fields that, when used in a union, ensure 780 ** maximum alignment for the other items in that union. 781 */ 782 #define LUAI_MAXALIGN lua_Number n; double u; void *s; lua_Integer i; long l 783 784 /* }================================================================== */ 785 786 787 788 789 790 /* =================================================================== */ 791 792 /* 793 ** Local configuration. You can use this space to add your redefinitions 794 ** without modifying the main part of the file. 795 */ 796 797 798 799 #include <luaconf.local.h> 800 801 #endif 802 803