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