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#define LUA_FLOAT_INT64 4 110 111 112/* Default configuration ('long long' and 'double', for 64-bit Lua) */ 113#define LUA_INT_DEFAULT LUA_INT_LONGLONG 114#define LUA_FLOAT_DEFAULT LUA_FLOAT_DOUBLE 115 116 117/* 118@@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats. 119*/ 120#define LUA_32BITS 0 121 122 123/* 124@@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for 125** C89 ('long' and 'double'); Windows always has '__int64', so it does 126** not need to use this case. 127*/ 128#if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS) 129#define LUA_C89_NUMBERS 1 130#else 131#define LUA_C89_NUMBERS 0 132#endif 133 134 135#if LUA_32BITS /* { */ 136/* 137** 32-bit integers and 'float' 138*/ 139#if LUAI_IS32INT /* use 'int' if big enough */ 140#define LUA_INT_TYPE LUA_INT_INT 141#else /* otherwise use 'long' */ 142#define LUA_INT_TYPE LUA_INT_LONG 143#endif 144#define LUA_FLOAT_TYPE LUA_FLOAT_FLOAT 145 146#elif LUA_C89_NUMBERS /* }{ */ 147/* 148** largest types available for C89 ('long' and 'double') 149*/ 150#define LUA_INT_TYPE LUA_INT_LONG 151#define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE 152 153#else /* }{ */ 154/* use defaults */ 155 156#define LUA_INT_TYPE LUA_INT_DEFAULT 157#define LUA_FLOAT_TYPE LUA_FLOAT_DEFAULT 158 159#endif /* } */ 160 161 162/* }================================================================== */ 163 164 165 166/* 167** {================================================================== 168** Configuration for Paths. 169** =================================================================== 170*/ 171 172/* 173** LUA_PATH_SEP is the character that separates templates in a path. 174** LUA_PATH_MARK is the string that marks the substitution points in a 175** template. 176** LUA_EXEC_DIR in a Windows path is replaced by the executable's 177** directory. 178*/ 179#define LUA_PATH_SEP ";" 180#define LUA_PATH_MARK "?" 181#define LUA_EXEC_DIR "!" 182 183 184/* 185@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for 186** Lua libraries. 187@@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for 188** C libraries. 189** CHANGE them if your machine has a non-conventional directory 190** hierarchy or if you want to install your libraries in 191** non-conventional directories. 192*/ 193 194#define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR 195#if defined(_WIN32) /* { */ 196/* 197** In Windows, any exclamation mark ('!') in the path is replaced by the 198** path of the directory of the executable file of the current process. 199*/ 200#define LUA_LDIR "!\\lua\\" 201#define LUA_CDIR "!\\" 202#define LUA_SHRDIR "!\\..\\share\\lua\\" LUA_VDIR "\\" 203 204#if !defined(LUA_PATH_DEFAULT) 205#define LUA_PATH_DEFAULT \ 206 LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \ 207 LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" \ 208 LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \ 209 ".\\?.lua;" ".\\?\\init.lua" 210#endif 211 212#if !defined(LUA_CPATH_DEFAULT) 213#define LUA_CPATH_DEFAULT \ 214 LUA_CDIR"?.dll;" \ 215 LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \ 216 LUA_CDIR"loadall.dll;" ".\\?.dll" 217#endif 218 219#else /* }{ */ 220 221#define LUA_ROOT "/usr/local/" 222#define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR "/" 223#define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR "/" 224 225#if !defined(LUA_PATH_DEFAULT) 226#define LUA_PATH_DEFAULT \ 227 LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \ 228 LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" \ 229 "./?.lua;" "./?/init.lua" 230#endif 231 232#if !defined(LUA_CPATH_DEFAULT) 233#define LUA_CPATH_DEFAULT \ 234 LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so" 235#endif 236 237#endif /* } */ 238 239 240/* 241@@ LUA_DIRSEP is the directory separator (for submodules). 242** CHANGE it if your machine does not use "/" as the directory separator 243** and is not Windows. (On Windows Lua automatically uses "\".) 244*/ 245#if !defined(LUA_DIRSEP) 246 247#if defined(_WIN32) 248#define LUA_DIRSEP "\\" 249#else 250#define LUA_DIRSEP "/" 251#endif 252 253#endif 254 255/* }================================================================== */ 256 257 258/* 259** {================================================================== 260** Marks for exported symbols in the C code 261** =================================================================== 262*/ 263 264/* 265@@ LUA_API is a mark for all core API functions. 266@@ LUALIB_API is a mark for all auxiliary library functions. 267@@ LUAMOD_API is a mark for all standard library opening functions. 268** CHANGE them if you need to define those functions in some special way. 269** For instance, if you want to create one Windows DLL with the core and 270** the libraries, you may want to use the following definition (define 271** LUA_BUILD_AS_DLL to get it). 272*/ 273#if defined(LUA_BUILD_AS_DLL) /* { */ 274 275#if defined(LUA_CORE) || defined(LUA_LIB) /* { */ 276#define LUA_API __declspec(dllexport) 277#else /* }{ */ 278#define LUA_API __declspec(dllimport) 279#endif /* } */ 280 281#else /* }{ */ 282 283#define LUA_API extern 284 285#endif /* } */ 286 287 288/* 289** More often than not the libs go together with the core. 290*/ 291#define LUALIB_API LUA_API 292#define LUAMOD_API LUA_API 293 294 295/* 296@@ LUAI_FUNC is a mark for all extern functions that are not to be 297** exported to outside modules. 298@@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables, 299** none of which to be exported to outside modules (LUAI_DDEF for 300** definitions and LUAI_DDEC for declarations). 301** CHANGE them if you need to mark them in some special way. Elf/gcc 302** (versions 3.2 and later) mark them as "hidden" to optimize access 303** when Lua is compiled as a shared library. Not all elf targets support 304** this attribute. Unfortunately, gcc does not offer a way to check 305** whether the target offers that support, and those without support 306** give a warning about it. To avoid these warnings, change to the 307** default definition. 308*/ 309#if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ 310 defined(__ELF__) /* { */ 311#define LUAI_FUNC __attribute__((visibility("internal"))) extern 312#else /* }{ */ 313#define LUAI_FUNC extern 314#endif /* } */ 315 316#define LUAI_DDEC(dec) LUAI_FUNC dec 317#define LUAI_DDEF /* empty */ 318 319/* }================================================================== */ 320 321 322/* 323** {================================================================== 324** Compatibility with previous versions 325** =================================================================== 326*/ 327 328/* 329@@ LUA_COMPAT_5_3 controls other macros for compatibility with Lua 5.3. 330** You can define it to get all options, or change specific options 331** to fit your specific needs. 332*/ 333#if defined(LUA_COMPAT_5_3) /* { */ 334 335/* 336@@ LUA_COMPAT_MATHLIB controls the presence of several deprecated 337** functions in the mathematical library. 338** (These functions were already officially removed in 5.3; 339** nevertheless they are still available here.) 340*/ 341#define LUA_COMPAT_MATHLIB 342 343/* 344@@ LUA_COMPAT_APIINTCASTS controls the presence of macros for 345** manipulating other integer types (lua_pushunsigned, lua_tounsigned, 346** luaL_checkint, luaL_checklong, etc.) 347** (These macros were also officially removed in 5.3, but they are still 348** available here.) 349*/ 350#define LUA_COMPAT_APIINTCASTS 351 352 353/* 354@@ LUA_COMPAT_LT_LE controls the emulation of the '__le' metamethod 355** using '__lt'. 356*/ 357#define LUA_COMPAT_LT_LE 358 359 360/* 361@@ The following macros supply trivial compatibility for some 362** changes in the API. The macros themselves document how to 363** change your code to avoid using them. 364** (Once more, these macros were officially removed in 5.3, but they are 365** still available here.) 366*/ 367#define lua_strlen(L,i) lua_rawlen(L, (i)) 368 369#define lua_objlen(L,i) lua_rawlen(L, (i)) 370 371#define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ) 372#define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT) 373 374#endif /* } */ 375 376/* }================================================================== */ 377 378 379 380/* 381** {================================================================== 382** Configuration for Numbers (low-level part). 383** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_* 384** satisfy your needs. 385** =================================================================== 386*/ 387 388/* 389@@ LUAI_UACNUMBER is the result of a 'default argument promotion' 390@@ over a floating number. 391@@ l_floatatt(x) corrects float attribute 'x' to the proper float type 392** by prefixing it with one of FLT/DBL/LDBL. 393@@ LUA_NUMBER_FRMLEN is the length modifier for writing floats. 394@@ LUA_NUMBER_FMT is the format for writing floats. 395@@ lua_number2str converts a float to a string. 396@@ l_mathop allows the addition of an 'l' or 'f' to all math operations. 397@@ l_floor takes the floor of a float. 398@@ lua_str2number converts a decimal numeral to a number. 399*/ 400 401 402/* The following definitions are good for most cases here */ 403 404#define l_floor(x) (l_mathop(floor)(x)) 405 406#define lua_number2str(s,sz,n) \ 407 l_sprintf((s), sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)(n)) 408 409/* 410@@ lua_numbertointeger converts a float number with an integral value 411** to an integer, or returns 0 if float is not within the range of 412** a lua_Integer. (The range comparisons are tricky because of 413** rounding. The tests here assume a two-complement representation, 414** where MININTEGER always has an exact representation as a float; 415** MAXINTEGER may not have one, and therefore its conversion to float 416** may have an ill-defined value.) 417*/ 418#define lua_numbertointeger(n,p) \ 419 ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \ 420 (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \ 421 (*(p) = (LUA_INTEGER)(n), 1)) 422 423 424/* now the variable definitions */ 425 426#if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT /* { single float */ 427 428#define LUA_NUMBER float 429 430#define l_floatatt(n) (FLT_##n) 431 432#define LUAI_UACNUMBER double 433 434#define LUA_NUMBER_FRMLEN "" 435#define LUA_NUMBER_FMT "%.7g" 436 437#define l_mathop(op) op##f 438 439#define lua_str2number(s,p) strtof((s), (p)) 440 441 442#elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE /* }{ long double */ 443 444#define LUA_NUMBER long double 445 446#define l_floatatt(n) (LDBL_##n) 447 448#define LUAI_UACNUMBER long double 449 450#define LUA_NUMBER_FRMLEN "L" 451#define LUA_NUMBER_FMT "%.19Lg" 452 453#define l_mathop(op) op##l 454 455#define lua_str2number(s,p) strtold((s), (p)) 456 457#elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE /* }{ double */ 458 459#define LUA_NUMBER double 460 461#define l_floatatt(n) (DBL_##n) 462 463#define LUAI_UACNUMBER double 464 465#define LUA_NUMBER_FRMLEN "" 466#define LUA_NUMBER_FMT "%.14g" 467 468#define l_mathop(op) op 469 470#define lua_str2number(s,p) strtod((s), (p)) 471 472#else /* }{ */ 473 474#error "numeric float type not defined" 475 476#endif /* } */ 477 478 479 480/* 481@@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER. 482@@ LUAI_UACINT is the result of a 'default argument promotion' 483@@ over a LUA_INTEGER. 484@@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers. 485@@ LUA_INTEGER_FMT is the format for writing integers. 486@@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER. 487@@ LUA_MININTEGER is the minimum value for a LUA_INTEGER. 488@@ LUA_MAXUNSIGNED is the maximum value for 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/* now the variable definitions */ 510 511#if LUA_INT_TYPE == LUA_INT_INT /* { int */ 512 513#define LUA_INTEGER int 514#define LUA_INTEGER_FRMLEN "" 515 516#define LUA_MAXINTEGER INT_MAX 517#define LUA_MININTEGER INT_MIN 518 519#define LUA_MAXUNSIGNED UINT_MAX 520 521#elif LUA_INT_TYPE == LUA_INT_LONG /* }{ long */ 522 523#define LUA_INTEGER long 524#define LUA_INTEGER_FRMLEN "l" 525 526#define LUA_MAXINTEGER LONG_MAX 527#define LUA_MININTEGER LONG_MIN 528 529#define LUA_MAXUNSIGNED ULONG_MAX 530 531#elif LUA_INT_TYPE == LUA_INT_LONGLONG /* }{ long long */ 532 533/* use presence of macro LLONG_MAX as proxy for C99 compliance */ 534#if defined(LLONG_MAX) /* { */ 535/* use ISO C99 stuff */ 536 537#define LUA_INTEGER long long 538#define LUA_INTEGER_FRMLEN "ll" 539 540#define LUA_MAXINTEGER LLONG_MAX 541#define LUA_MININTEGER LLONG_MIN 542 543#define LUA_MAXUNSIGNED ULLONG_MAX 544 545#elif defined(LUA_USE_WINDOWS) /* }{ */ 546/* in Windows, can use specific Windows types */ 547 548#define LUA_INTEGER __int64 549#define LUA_INTEGER_FRMLEN "I64" 550 551#define LUA_MAXINTEGER _I64_MAX 552#define LUA_MININTEGER _I64_MIN 553 554#define LUA_MAXUNSIGNED _UI64_MAX 555 556#else /* }{ */ 557 558#error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \ 559 or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)" 560 561#endif /* } */ 562 563#else /* }{ */ 564 565#error "numeric integer type not defined" 566 567#endif /* } */ 568 569/* }================================================================== */ 570 571 572/* 573** {================================================================== 574** Dependencies with C99 and other C details 575** =================================================================== 576*/ 577 578/* 579@@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89. 580** (All uses in Lua have only one format item.) 581*/ 582#if !defined(LUA_USE_C89) 583#define l_sprintf(s,sz,f,i) snprintf(s,sz,f,i) 584#else 585#define l_sprintf(s,sz,f,i) ((void)(sz), sprintf(s,f,i)) 586#endif 587 588 589/* 590@@ lua_strx2number converts a hexadecimal numeral to a number. 591** In C99, 'strtod' does that conversion. Otherwise, you can 592** leave 'lua_strx2number' undefined and Lua will provide its own 593** implementation. 594*/ 595#if !defined(LUA_USE_C89) 596#define lua_strx2number(s,p) lua_str2number(s,p) 597#endif 598 599 600/* 601@@ lua_pointer2str converts a pointer to a readable string in a 602** non-specified way. 603*/ 604#define lua_pointer2str(buff,sz,p) l_sprintf(buff,sz,"%p",p) 605 606 607/* 608@@ lua_number2strx converts a float to a hexadecimal numeral. 609** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that. 610** Otherwise, you can leave 'lua_number2strx' undefined and Lua will 611** provide its own implementation. 612*/ 613#if !defined(LUA_USE_C89) 614#define lua_number2strx(L,b,sz,f,n) \ 615 ((void)L, l_sprintf(b,sz,f,(LUAI_UACNUMBER)(n))) 616#endif 617 618 619/* 620** 'strtof' and 'opf' variants for math functions are not valid in 621** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the 622** availability of these variants. ('math.h' is already included in 623** all files that use these macros.) 624*/ 625#if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF)) 626#undef l_mathop /* variants not available */ 627#undef lua_str2number 628#define l_mathop(op) (lua_Number)op /* no variant */ 629#define lua_str2number(s,p) ((lua_Number)strtod((s), (p))) 630#endif 631 632 633/* 634@@ LUA_KCONTEXT is the type of the context ('ctx') for continuation 635** functions. It must be a numerical type; Lua will use 'intptr_t' if 636** available, otherwise it will use 'ptrdiff_t' (the nearest thing to 637** 'intptr_t' in C89) 638*/ 639#define LUA_KCONTEXT ptrdiff_t 640 641#if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \ 642 __STDC_VERSION__ >= 199901L 643#include <stdint.h> 644#if defined(INTPTR_MAX) /* even in C99 this type is optional */ 645#undef LUA_KCONTEXT 646#define LUA_KCONTEXT intptr_t 647#endif 648#endif 649 650 651/* 652@@ lua_getlocaledecpoint gets the locale "radix character" (decimal point). 653** Change that if you do not want to use C locales. (Code using this 654** macro must include the header 'locale.h'.) 655*/ 656#if !defined(lua_getlocaledecpoint) 657#define lua_getlocaledecpoint() (localeconv()->decimal_point[0]) 658#endif 659 660 661/* 662** macros to improve jump prediction, used mostly for error handling 663** and debug facilities. (Some macros in the Lua API use these macros. 664** Define LUA_NOBUILTIN if you do not want '__builtin_expect' in your 665** code.) 666*/ 667#if !defined(luai_likely) 668 669#if defined(__GNUC__) && !defined(LUA_NOBUILTIN) 670#define luai_likely(x) (__builtin_expect(((x) != 0), 1)) 671#define luai_unlikely(x) (__builtin_expect(((x) != 0), 0)) 672#else 673#define luai_likely(x) (x) 674#define luai_unlikely(x) (x) 675#endif 676 677#endif 678 679 680#if defined(LUA_CORE) || defined(LUA_LIB) 681/* shorter names for Lua's own use */ 682#define l_likely(x) luai_likely(x) 683#define l_unlikely(x) luai_unlikely(x) 684#endif 685 686 687 688/* }================================================================== */ 689 690 691/* 692** {================================================================== 693** Language Variations 694** ===================================================================== 695*/ 696 697/* 698@@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some 699** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from 700** numbers to strings. Define LUA_NOCVTS2N to turn off automatic 701** coercion from strings to numbers. 702*/ 703/* #define LUA_NOCVTN2S */ 704/* #define LUA_NOCVTS2N */ 705 706 707/* 708@@ LUA_USE_APICHECK turns on several consistency checks on the C API. 709** Define it as a help when debugging C code. 710*/ 711#if defined(LUA_USE_APICHECK) 712#include <assert.h> 713#define luai_apicheck(l,e) assert(e) 714#endif 715 716/* }================================================================== */ 717 718 719/* 720** {================================================================== 721** Macros that affect the API and must be stable (that is, must be the 722** same when you compile Lua and when you compile code that links to 723** Lua). 724** ===================================================================== 725*/ 726 727/* 728@@ LUAI_MAXSTACK limits the size of the Lua stack. 729** CHANGE it if you need a different limit. This limit is arbitrary; 730** its only purpose is to stop Lua from consuming unlimited stack 731** space (and to reserve some numbers for pseudo-indices). 732** (It must fit into max(size_t)/32.) 733*/ 734#if LUAI_IS32INT 735#define LUAI_MAXSTACK 1000000 736#else 737#define LUAI_MAXSTACK 15000 738#endif 739 740 741/* 742@@ LUA_EXTRASPACE defines the size of a raw memory area associated with 743** a Lua state with very fast access. 744** CHANGE it if you need a different size. 745*/ 746#define LUA_EXTRASPACE (sizeof(void *)) 747 748 749/* 750@@ LUA_IDSIZE gives the maximum size for the description of the source 751@@ of a function in debug information. 752** CHANGE it if you want a different size. 753*/ 754#define LUA_IDSIZE 60 755 756 757/* 758@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system. 759*/ 760#define LUAL_BUFFERSIZE ((int)(16 * sizeof(void*) * sizeof(lua_Number))) 761 762 763/* 764@@ LUAI_MAXALIGN defines fields that, when used in a union, ensure 765** maximum alignment for the other items in that union. 766*/ 767#define LUAI_MAXALIGN lua_Number n; double u; void *s; lua_Integer i; long l 768 769/* }================================================================== */ 770 771 772 773 774 775/* =================================================================== */ 776 777/* 778** Local configuration. You can use this space to add your redefinitions 779** without modifying the main part of the file. 780*/ 781 782 783 784 785 786#endif 787 788